diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/scsi/megaraid/megaraid_sas_fusion.c | 5260 |
1 files changed, 5260 insertions, 0 deletions
diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.c b/drivers/scsi/megaraid/megaraid_sas_fusion.c new file mode 100644 index 000000000..8eb126d48 --- /dev/null +++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c @@ -0,0 +1,5260 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Linux MegaRAID driver for SAS based RAID controllers + * + * Copyright (c) 2009-2013 LSI Corporation + * Copyright (c) 2013-2016 Avago Technologies + * Copyright (c) 2016-2018 Broadcom Inc. + * + * FILE: megaraid_sas_fusion.c + * + * Authors: Broadcom Inc. + * Sumant Patro + * Adam Radford + * Kashyap Desai <kashyap.desai@broadcom.com> + * Sumit Saxena <sumit.saxena@broadcom.com> + * + * Send feedback to: megaraidlinux.pdl@broadcom.com + */ + +#include <linux/kernel.h> +#include <linux/types.h> +#include <linux/pci.h> +#include <linux/list.h> +#include <linux/moduleparam.h> +#include <linux/module.h> +#include <linux/spinlock.h> +#include <linux/interrupt.h> +#include <linux/delay.h> +#include <linux/uio.h> +#include <linux/uaccess.h> +#include <linux/fs.h> +#include <linux/compat.h> +#include <linux/blkdev.h> +#include <linux/mutex.h> +#include <linux/poll.h> +#include <linux/vmalloc.h> +#include <linux/workqueue.h> +#include <linux/irq_poll.h> + +#include <scsi/scsi.h> +#include <scsi/scsi_cmnd.h> +#include <scsi/scsi_device.h> +#include <scsi/scsi_host.h> +#include <scsi/scsi_dbg.h> +#include <linux/dmi.h> + +#include "megaraid_sas_fusion.h" +#include "megaraid_sas.h" + + +extern void +megasas_complete_cmd(struct megasas_instance *instance, + struct megasas_cmd *cmd, u8 alt_status); +int +wait_and_poll(struct megasas_instance *instance, struct megasas_cmd *cmd, + int seconds); + +int +megasas_clear_intr_fusion(struct megasas_instance *instance); + +int megasas_transition_to_ready(struct megasas_instance *instance, int ocr); + +extern u32 megasas_dbg_lvl; +int megasas_sriov_start_heartbeat(struct megasas_instance *instance, + int initial); +extern struct megasas_mgmt_info megasas_mgmt_info; +extern unsigned int resetwaittime; +extern unsigned int dual_qdepth_disable; +static void megasas_free_rdpq_fusion(struct megasas_instance *instance); +static void megasas_free_reply_fusion(struct megasas_instance *instance); +static inline +void megasas_configure_queue_sizes(struct megasas_instance *instance); +static void megasas_fusion_crash_dump(struct megasas_instance *instance); + +/** + * megasas_adp_reset_wait_for_ready - initiate chip reset and wait for + * controller to come to ready state + * @instance: adapter's soft state + * @do_adp_reset: If true, do a chip reset + * @ocr_context: If called from OCR context this will + * be set to 1, else 0 + * + * This function initates a chip reset followed by a wait for controller to + * transition to ready state. + * During this, driver will block all access to PCI config space from userspace + */ +int +megasas_adp_reset_wait_for_ready(struct megasas_instance *instance, + bool do_adp_reset, + int ocr_context) +{ + int ret = FAILED; + + /* + * Block access to PCI config space from userspace + * when diag reset is initiated from driver + */ + if (megasas_dbg_lvl & OCR_DEBUG) + dev_info(&instance->pdev->dev, + "Block access to PCI config space %s %d\n", + __func__, __LINE__); + + pci_cfg_access_lock(instance->pdev); + + if (do_adp_reset) { + if (instance->instancet->adp_reset + (instance, instance->reg_set)) + goto out; + } + + /* Wait for FW to become ready */ + if (megasas_transition_to_ready(instance, ocr_context)) { + dev_warn(&instance->pdev->dev, + "Failed to transition controller to ready for scsi%d.\n", + instance->host->host_no); + goto out; + } + + ret = SUCCESS; +out: + if (megasas_dbg_lvl & OCR_DEBUG) + dev_info(&instance->pdev->dev, + "Unlock access to PCI config space %s %d\n", + __func__, __LINE__); + + pci_cfg_access_unlock(instance->pdev); + + return ret; +} + +/** + * megasas_check_same_4gb_region - check if allocation + * crosses same 4GB boundary or not + * @instance: adapter's soft instance + * @start_addr: start address of DMA allocation + * @size: size of allocation in bytes + * @return: true : allocation does not cross same + * 4GB boundary + * false: allocation crosses same + * 4GB boundary + */ +static inline bool megasas_check_same_4gb_region + (struct megasas_instance *instance, dma_addr_t start_addr, size_t size) +{ + dma_addr_t end_addr; + + end_addr = start_addr + size; + + if (upper_32_bits(start_addr) != upper_32_bits(end_addr)) { + dev_err(&instance->pdev->dev, + "Failed to get same 4GB boundary: start_addr: 0x%llx end_addr: 0x%llx\n", + (unsigned long long)start_addr, + (unsigned long long)end_addr); + return false; + } + + return true; +} + +/** + * megasas_enable_intr_fusion - Enables interrupts + * @instance: adapter's soft instance + */ +static void +megasas_enable_intr_fusion(struct megasas_instance *instance) +{ + struct megasas_register_set __iomem *regs; + regs = instance->reg_set; + + instance->mask_interrupts = 0; + /* For Thunderbolt/Invader also clear intr on enable */ + writel(~0, ®s->outbound_intr_status); + readl(®s->outbound_intr_status); + + writel(~MFI_FUSION_ENABLE_INTERRUPT_MASK, &(regs)->outbound_intr_mask); + + /* Dummy readl to force pci flush */ + dev_info(&instance->pdev->dev, "%s is called outbound_intr_mask:0x%08x\n", + __func__, readl(®s->outbound_intr_mask)); +} + +/** + * megasas_disable_intr_fusion - Disables interrupt + * @instance: adapter's soft instance + */ +static void +megasas_disable_intr_fusion(struct megasas_instance *instance) +{ + u32 mask = 0xFFFFFFFF; + struct megasas_register_set __iomem *regs; + regs = instance->reg_set; + instance->mask_interrupts = 1; + + writel(mask, ®s->outbound_intr_mask); + /* Dummy readl to force pci flush */ + dev_info(&instance->pdev->dev, "%s is called outbound_intr_mask:0x%08x\n", + __func__, readl(®s->outbound_intr_mask)); +} + +int +megasas_clear_intr_fusion(struct megasas_instance *instance) +{ + u32 status; + struct megasas_register_set __iomem *regs; + regs = instance->reg_set; + /* + * Check if it is our interrupt + */ + status = megasas_readl(instance, + ®s->outbound_intr_status); + + if (status & 1) { + writel(status, ®s->outbound_intr_status); + readl(®s->outbound_intr_status); + return 1; + } + if (!(status & MFI_FUSION_ENABLE_INTERRUPT_MASK)) + return 0; + + return 1; +} + +/** + * megasas_get_cmd_fusion - Get a command from the free pool + * @instance: Adapter soft state + * @blk_tag: Command tag + * + * Returns a blk_tag indexed mpt frame + */ +inline struct megasas_cmd_fusion *megasas_get_cmd_fusion(struct megasas_instance + *instance, u32 blk_tag) +{ + struct fusion_context *fusion; + + fusion = instance->ctrl_context; + return fusion->cmd_list[blk_tag]; +} + +/** + * megasas_return_cmd_fusion - Return a cmd to free command pool + * @instance: Adapter soft state + * @cmd: Command packet to be returned to free command pool + */ +inline void megasas_return_cmd_fusion(struct megasas_instance *instance, + struct megasas_cmd_fusion *cmd) +{ + cmd->scmd = NULL; + memset(cmd->io_request, 0, MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE); + cmd->r1_alt_dev_handle = MR_DEVHANDLE_INVALID; + cmd->cmd_completed = false; +} + +/** + * megasas_write_64bit_req_desc - PCI writes 64bit request descriptor + * @instance: Adapter soft state + * @req_desc: 64bit Request descriptor + */ +static void +megasas_write_64bit_req_desc(struct megasas_instance *instance, + union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc) +{ +#if defined(writeq) && defined(CONFIG_64BIT) + u64 req_data = (((u64)le32_to_cpu(req_desc->u.high) << 32) | + le32_to_cpu(req_desc->u.low)); + writeq(req_data, &instance->reg_set->inbound_low_queue_port); +#else + unsigned long flags; + spin_lock_irqsave(&instance->hba_lock, flags); + writel(le32_to_cpu(req_desc->u.low), + &instance->reg_set->inbound_low_queue_port); + writel(le32_to_cpu(req_desc->u.high), + &instance->reg_set->inbound_high_queue_port); + spin_unlock_irqrestore(&instance->hba_lock, flags); +#endif +} + +/** + * megasas_fire_cmd_fusion - Sends command to the FW + * @instance: Adapter soft state + * @req_desc: 32bit or 64bit Request descriptor + * + * Perform PCI Write. AERO SERIES supports 32 bit Descriptor. + * Prior to AERO_SERIES support 64 bit Descriptor. + */ +static void +megasas_fire_cmd_fusion(struct megasas_instance *instance, + union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc) +{ + if (instance->atomic_desc_support) + writel(le32_to_cpu(req_desc->u.low), + &instance->reg_set->inbound_single_queue_port); + else + megasas_write_64bit_req_desc(instance, req_desc); +} + +/** + * megasas_fusion_update_can_queue - Do all Adapter Queue depth related calculations here + * @instance: Adapter soft state + * @fw_boot_context: Whether this function called during probe or after OCR + * + * This function is only for fusion controllers. + * Update host can queue, if firmware downgrade max supported firmware commands. + * Firmware upgrade case will be skiped because underlying firmware has + * more resource than exposed to the OS. + * + */ +static void +megasas_fusion_update_can_queue(struct megasas_instance *instance, int fw_boot_context) +{ + u16 cur_max_fw_cmds = 0; + u16 ldio_threshold = 0; + + /* ventura FW does not fill outbound_scratch_pad_2 with queue depth */ + if (instance->adapter_type < VENTURA_SERIES) + cur_max_fw_cmds = + megasas_readl(instance, + &instance->reg_set->outbound_scratch_pad_2) & 0x00FFFF; + + if (dual_qdepth_disable || !cur_max_fw_cmds) + cur_max_fw_cmds = instance->instancet->read_fw_status_reg(instance) & 0x00FFFF; + else + ldio_threshold = + (instance->instancet->read_fw_status_reg(instance) & 0x00FFFF) - MEGASAS_FUSION_IOCTL_CMDS; + + dev_info(&instance->pdev->dev, + "Current firmware supports maximum commands: %d\t LDIO threshold: %d\n", + cur_max_fw_cmds, ldio_threshold); + + if (fw_boot_context == OCR_CONTEXT) { + cur_max_fw_cmds = cur_max_fw_cmds - 1; + if (cur_max_fw_cmds < instance->max_fw_cmds) { + instance->cur_can_queue = + cur_max_fw_cmds - (MEGASAS_FUSION_INTERNAL_CMDS + + MEGASAS_FUSION_IOCTL_CMDS); + instance->host->can_queue = instance->cur_can_queue; + instance->ldio_threshold = ldio_threshold; + } + } else { + instance->max_fw_cmds = cur_max_fw_cmds; + instance->ldio_threshold = ldio_threshold; + + if (reset_devices) + instance->max_fw_cmds = min(instance->max_fw_cmds, + (u16)MEGASAS_KDUMP_QUEUE_DEPTH); + /* + * Reduce the max supported cmds by 1. This is to ensure that the + * reply_q_sz (1 more than the max cmd that driver may send) + * does not exceed max cmds that the FW can support + */ + instance->max_fw_cmds = instance->max_fw_cmds-1; + } +} + +static inline void +megasas_get_msix_index(struct megasas_instance *instance, + struct scsi_cmnd *scmd, + struct megasas_cmd_fusion *cmd, + u8 data_arms) +{ + int sdev_busy; + + /* nr_hw_queue = 1 for MegaRAID */ + struct blk_mq_hw_ctx *hctx = + scmd->device->request_queue->queue_hw_ctx[0]; + + sdev_busy = atomic_read(&hctx->nr_active); + + if (instance->perf_mode == MR_BALANCED_PERF_MODE && + sdev_busy > (data_arms * MR_DEVICE_HIGH_IOPS_DEPTH)) + cmd->request_desc->SCSIIO.MSIxIndex = + mega_mod64((atomic64_add_return(1, &instance->high_iops_outstanding) / + MR_HIGH_IOPS_BATCH_COUNT), instance->low_latency_index_start); + else if (instance->msix_load_balance) + cmd->request_desc->SCSIIO.MSIxIndex = + (mega_mod64(atomic64_add_return(1, &instance->total_io_count), + instance->msix_vectors)); + else + cmd->request_desc->SCSIIO.MSIxIndex = + instance->reply_map[raw_smp_processor_id()]; +} + +/** + * megasas_free_cmds_fusion - Free all the cmds in the free cmd pool + * @instance: Adapter soft state + */ +void +megasas_free_cmds_fusion(struct megasas_instance *instance) +{ + int i; + struct fusion_context *fusion = instance->ctrl_context; + struct megasas_cmd_fusion *cmd; + + if (fusion->sense) + dma_pool_free(fusion->sense_dma_pool, fusion->sense, + fusion->sense_phys_addr); + + /* SG */ + if (fusion->cmd_list) { + for (i = 0; i < instance->max_mpt_cmds; i++) { + cmd = fusion->cmd_list[i]; + if (cmd) { + if (cmd->sg_frame) + dma_pool_free(fusion->sg_dma_pool, + cmd->sg_frame, + cmd->sg_frame_phys_addr); + } + kfree(cmd); + } + kfree(fusion->cmd_list); + } + + if (fusion->sg_dma_pool) { + dma_pool_destroy(fusion->sg_dma_pool); + fusion->sg_dma_pool = NULL; + } + if (fusion->sense_dma_pool) { + dma_pool_destroy(fusion->sense_dma_pool); + fusion->sense_dma_pool = NULL; + } + + + /* Reply Frame, Desc*/ + if (instance->is_rdpq) + megasas_free_rdpq_fusion(instance); + else + megasas_free_reply_fusion(instance); + + /* Request Frame, Desc*/ + if (fusion->req_frames_desc) + dma_free_coherent(&instance->pdev->dev, + fusion->request_alloc_sz, fusion->req_frames_desc, + fusion->req_frames_desc_phys); + if (fusion->io_request_frames) + dma_pool_free(fusion->io_request_frames_pool, + fusion->io_request_frames, + fusion->io_request_frames_phys); + if (fusion->io_request_frames_pool) { + dma_pool_destroy(fusion->io_request_frames_pool); + fusion->io_request_frames_pool = NULL; + } +} + +/** + * megasas_create_sg_sense_fusion - Creates DMA pool for cmd frames + * @instance: Adapter soft state + * + */ +static int megasas_create_sg_sense_fusion(struct megasas_instance *instance) +{ + int i; + u16 max_cmd; + struct fusion_context *fusion; + struct megasas_cmd_fusion *cmd; + int sense_sz; + u32 offset; + + fusion = instance->ctrl_context; + max_cmd = instance->max_fw_cmds; + sense_sz = instance->max_mpt_cmds * SCSI_SENSE_BUFFERSIZE; + + fusion->sg_dma_pool = + dma_pool_create("mr_sg", &instance->pdev->dev, + instance->max_chain_frame_sz, + MR_DEFAULT_NVME_PAGE_SIZE, 0); + /* SCSI_SENSE_BUFFERSIZE = 96 bytes */ + fusion->sense_dma_pool = + dma_pool_create("mr_sense", &instance->pdev->dev, + sense_sz, 64, 0); + + if (!fusion->sense_dma_pool || !fusion->sg_dma_pool) { + dev_err(&instance->pdev->dev, + "Failed from %s %d\n", __func__, __LINE__); + return -ENOMEM; + } + + fusion->sense = dma_pool_alloc(fusion->sense_dma_pool, + GFP_KERNEL, &fusion->sense_phys_addr); + if (!fusion->sense) { + dev_err(&instance->pdev->dev, + "failed from %s %d\n", __func__, __LINE__); + return -ENOMEM; + } + + /* sense buffer, request frame and reply desc pool requires to be in + * same 4 gb region. Below function will check this. + * In case of failure, new pci pool will be created with updated + * alignment. + * Older allocation and pool will be destroyed. + * Alignment will be used such a way that next allocation if success, + * will always meet same 4gb region requirement. + * Actual requirement is not alignment, but we need start and end of + * DMA address must have same upper 32 bit address. + */ + + if (!megasas_check_same_4gb_region(instance, fusion->sense_phys_addr, + sense_sz)) { + dma_pool_free(fusion->sense_dma_pool, fusion->sense, + fusion->sense_phys_addr); + fusion->sense = NULL; + dma_pool_destroy(fusion->sense_dma_pool); + + fusion->sense_dma_pool = + dma_pool_create("mr_sense_align", &instance->pdev->dev, + sense_sz, roundup_pow_of_two(sense_sz), + 0); + if (!fusion->sense_dma_pool) { + dev_err(&instance->pdev->dev, + "Failed from %s %d\n", __func__, __LINE__); + return -ENOMEM; + } + fusion->sense = dma_pool_alloc(fusion->sense_dma_pool, + GFP_KERNEL, + &fusion->sense_phys_addr); + if (!fusion->sense) { + dev_err(&instance->pdev->dev, + "failed from %s %d\n", __func__, __LINE__); + return -ENOMEM; + } + } + + /* + * Allocate and attach a frame to each of the commands in cmd_list + */ + for (i = 0; i < max_cmd; i++) { + cmd = fusion->cmd_list[i]; + cmd->sg_frame = dma_pool_alloc(fusion->sg_dma_pool, + GFP_KERNEL, &cmd->sg_frame_phys_addr); + + offset = SCSI_SENSE_BUFFERSIZE * i; + cmd->sense = (u8 *)fusion->sense + offset; + cmd->sense_phys_addr = fusion->sense_phys_addr + offset; + + if (!cmd->sg_frame) { + dev_err(&instance->pdev->dev, + "Failed from %s %d\n", __func__, __LINE__); + return -ENOMEM; + } + } + + /* create sense buffer for the raid 1/10 fp */ + for (i = max_cmd; i < instance->max_mpt_cmds; i++) { + cmd = fusion->cmd_list[i]; + offset = SCSI_SENSE_BUFFERSIZE * i; + cmd->sense = (u8 *)fusion->sense + offset; + cmd->sense_phys_addr = fusion->sense_phys_addr + offset; + + } + + return 0; +} + +static int +megasas_alloc_cmdlist_fusion(struct megasas_instance *instance) +{ + u32 max_mpt_cmd, i, j; + struct fusion_context *fusion; + + fusion = instance->ctrl_context; + + max_mpt_cmd = instance->max_mpt_cmds; + + /* + * fusion->cmd_list is an array of struct megasas_cmd_fusion pointers. + * Allocate the dynamic array first and then allocate individual + * commands. + */ + fusion->cmd_list = + kcalloc(max_mpt_cmd, sizeof(struct megasas_cmd_fusion *), + GFP_KERNEL); + if (!fusion->cmd_list) { + dev_err(&instance->pdev->dev, + "Failed from %s %d\n", __func__, __LINE__); + return -ENOMEM; + } + + for (i = 0; i < max_mpt_cmd; i++) { + fusion->cmd_list[i] = kzalloc(sizeof(struct megasas_cmd_fusion), + GFP_KERNEL); + if (!fusion->cmd_list[i]) { + for (j = 0; j < i; j++) + kfree(fusion->cmd_list[j]); + kfree(fusion->cmd_list); + dev_err(&instance->pdev->dev, + "Failed from %s %d\n", __func__, __LINE__); + return -ENOMEM; + } + } + + return 0; +} + +static int +megasas_alloc_request_fusion(struct megasas_instance *instance) +{ + struct fusion_context *fusion; + + fusion = instance->ctrl_context; + +retry_alloc: + fusion->io_request_frames_pool = + dma_pool_create("mr_ioreq", &instance->pdev->dev, + fusion->io_frames_alloc_sz, 16, 0); + + if (!fusion->io_request_frames_pool) { + dev_err(&instance->pdev->dev, + "Failed from %s %d\n", __func__, __LINE__); + return -ENOMEM; + } + + fusion->io_request_frames = + dma_pool_alloc(fusion->io_request_frames_pool, + GFP_KERNEL | __GFP_NOWARN, + &fusion->io_request_frames_phys); + if (!fusion->io_request_frames) { + if (instance->max_fw_cmds >= (MEGASAS_REDUCE_QD_COUNT * 2)) { + instance->max_fw_cmds -= MEGASAS_REDUCE_QD_COUNT; + dma_pool_destroy(fusion->io_request_frames_pool); + megasas_configure_queue_sizes(instance); + goto retry_alloc; + } else { + dev_err(&instance->pdev->dev, + "Failed from %s %d\n", __func__, __LINE__); + return -ENOMEM; + } + } + + if (!megasas_check_same_4gb_region(instance, + fusion->io_request_frames_phys, + fusion->io_frames_alloc_sz)) { + dma_pool_free(fusion->io_request_frames_pool, + fusion->io_request_frames, + fusion->io_request_frames_phys); + fusion->io_request_frames = NULL; + dma_pool_destroy(fusion->io_request_frames_pool); + + fusion->io_request_frames_pool = + dma_pool_create("mr_ioreq_align", + &instance->pdev->dev, + fusion->io_frames_alloc_sz, + roundup_pow_of_two(fusion->io_frames_alloc_sz), + 0); + + if (!fusion->io_request_frames_pool) { + dev_err(&instance->pdev->dev, + "Failed from %s %d\n", __func__, __LINE__); + return -ENOMEM; + } + + fusion->io_request_frames = + dma_pool_alloc(fusion->io_request_frames_pool, + GFP_KERNEL | __GFP_NOWARN, + &fusion->io_request_frames_phys); + + if (!fusion->io_request_frames) { + dev_err(&instance->pdev->dev, + "Failed from %s %d\n", __func__, __LINE__); + return -ENOMEM; + } + } + + fusion->req_frames_desc = + dma_alloc_coherent(&instance->pdev->dev, + fusion->request_alloc_sz, + &fusion->req_frames_desc_phys, GFP_KERNEL); + if (!fusion->req_frames_desc) { + dev_err(&instance->pdev->dev, + "Failed from %s %d\n", __func__, __LINE__); + return -ENOMEM; + } + + return 0; +} + +static int +megasas_alloc_reply_fusion(struct megasas_instance *instance) +{ + int i, count; + struct fusion_context *fusion; + union MPI2_REPLY_DESCRIPTORS_UNION *reply_desc; + fusion = instance->ctrl_context; + + count = instance->msix_vectors > 0 ? instance->msix_vectors : 1; + fusion->reply_frames_desc_pool = + dma_pool_create("mr_reply", &instance->pdev->dev, + fusion->reply_alloc_sz * count, 16, 0); + + if (!fusion->reply_frames_desc_pool) { + dev_err(&instance->pdev->dev, + "Failed from %s %d\n", __func__, __LINE__); + return -ENOMEM; + } + + fusion->reply_frames_desc[0] = + dma_pool_alloc(fusion->reply_frames_desc_pool, + GFP_KERNEL, &fusion->reply_frames_desc_phys[0]); + if (!fusion->reply_frames_desc[0]) { + dev_err(&instance->pdev->dev, + "Failed from %s %d\n", __func__, __LINE__); + return -ENOMEM; + } + + if (!megasas_check_same_4gb_region(instance, + fusion->reply_frames_desc_phys[0], + (fusion->reply_alloc_sz * count))) { + dma_pool_free(fusion->reply_frames_desc_pool, + fusion->reply_frames_desc[0], + fusion->reply_frames_desc_phys[0]); + fusion->reply_frames_desc[0] = NULL; + dma_pool_destroy(fusion->reply_frames_desc_pool); + + fusion->reply_frames_desc_pool = + dma_pool_create("mr_reply_align", + &instance->pdev->dev, + fusion->reply_alloc_sz * count, + roundup_pow_of_two(fusion->reply_alloc_sz * count), + 0); + + if (!fusion->reply_frames_desc_pool) { + dev_err(&instance->pdev->dev, + "Failed from %s %d\n", __func__, __LINE__); + return -ENOMEM; + } + + fusion->reply_frames_desc[0] = + dma_pool_alloc(fusion->reply_frames_desc_pool, + GFP_KERNEL, + &fusion->reply_frames_desc_phys[0]); + + if (!fusion->reply_frames_desc[0]) { + dev_err(&instance->pdev->dev, + "Failed from %s %d\n", __func__, __LINE__); + return -ENOMEM; + } + } + + reply_desc = fusion->reply_frames_desc[0]; + for (i = 0; i < fusion->reply_q_depth * count; i++, reply_desc++) + reply_desc->Words = cpu_to_le64(ULLONG_MAX); + + /* This is not a rdpq mode, but driver still populate + * reply_frame_desc array to use same msix index in ISR path. + */ + for (i = 0; i < (count - 1); i++) + fusion->reply_frames_desc[i + 1] = + fusion->reply_frames_desc[i] + + (fusion->reply_alloc_sz)/sizeof(union MPI2_REPLY_DESCRIPTORS_UNION); + + return 0; +} + +static int +megasas_alloc_rdpq_fusion(struct megasas_instance *instance) +{ + int i, j, k, msix_count; + struct fusion_context *fusion; + union MPI2_REPLY_DESCRIPTORS_UNION *reply_desc; + union MPI2_REPLY_DESCRIPTORS_UNION *rdpq_chunk_virt[RDPQ_MAX_CHUNK_COUNT]; + dma_addr_t rdpq_chunk_phys[RDPQ_MAX_CHUNK_COUNT]; + u8 dma_alloc_count, abs_index; + u32 chunk_size, array_size, offset; + + fusion = instance->ctrl_context; + chunk_size = fusion->reply_alloc_sz * RDPQ_MAX_INDEX_IN_ONE_CHUNK; + array_size = sizeof(struct MPI2_IOC_INIT_RDPQ_ARRAY_ENTRY) * + MAX_MSIX_QUEUES_FUSION; + + fusion->rdpq_virt = dma_alloc_coherent(&instance->pdev->dev, + array_size, &fusion->rdpq_phys, + GFP_KERNEL); + if (!fusion->rdpq_virt) { + dev_err(&instance->pdev->dev, + "Failed from %s %d\n", __func__, __LINE__); + return -ENOMEM; + } + + msix_count = instance->msix_vectors > 0 ? instance->msix_vectors : 1; + + fusion->reply_frames_desc_pool = dma_pool_create("mr_rdpq", + &instance->pdev->dev, + chunk_size, 16, 0); + fusion->reply_frames_desc_pool_align = + dma_pool_create("mr_rdpq_align", + &instance->pdev->dev, + chunk_size, + roundup_pow_of_two(chunk_size), + 0); + + if (!fusion->reply_frames_desc_pool || + !fusion->reply_frames_desc_pool_align) { + dev_err(&instance->pdev->dev, + "Failed from %s %d\n", __func__, __LINE__); + return -ENOMEM; + } + +/* + * For INVADER_SERIES each set of 8 reply queues(0-7, 8-15, ..) and + * VENTURA_SERIES each set of 16 reply queues(0-15, 16-31, ..) should be + * within 4GB boundary and also reply queues in a set must have same + * upper 32-bits in their memory address. so here driver is allocating the + * DMA'able memory for reply queues according. Driver uses limitation of + * VENTURA_SERIES to manage INVADER_SERIES as well. + */ + dma_alloc_count = DIV_ROUND_UP(msix_count, RDPQ_MAX_INDEX_IN_ONE_CHUNK); + + for (i = 0; i < dma_alloc_count; i++) { + rdpq_chunk_virt[i] = + dma_pool_alloc(fusion->reply_frames_desc_pool, + GFP_KERNEL, &rdpq_chunk_phys[i]); + if (!rdpq_chunk_virt[i]) { + dev_err(&instance->pdev->dev, + "Failed from %s %d\n", __func__, __LINE__); + return -ENOMEM; + } + /* reply desc pool requires to be in same 4 gb region. + * Below function will check this. + * In case of failure, new pci pool will be created with updated + * alignment. + * For RDPQ buffers, driver always allocate two separate pci pool. + * Alignment will be used such a way that next allocation if + * success, will always meet same 4gb region requirement. + * rdpq_tracker keep track of each buffer's physical, + * virtual address and pci pool descriptor. It will help driver + * while freeing the resources. + * + */ + if (!megasas_check_same_4gb_region(instance, rdpq_chunk_phys[i], + chunk_size)) { + dma_pool_free(fusion->reply_frames_desc_pool, + rdpq_chunk_virt[i], + rdpq_chunk_phys[i]); + + rdpq_chunk_virt[i] = + dma_pool_alloc(fusion->reply_frames_desc_pool_align, + GFP_KERNEL, &rdpq_chunk_phys[i]); + if (!rdpq_chunk_virt[i]) { + dev_err(&instance->pdev->dev, + "Failed from %s %d\n", + __func__, __LINE__); + return -ENOMEM; + } + fusion->rdpq_tracker[i].dma_pool_ptr = + fusion->reply_frames_desc_pool_align; + } else { + fusion->rdpq_tracker[i].dma_pool_ptr = + fusion->reply_frames_desc_pool; + } + + fusion->rdpq_tracker[i].pool_entry_phys = rdpq_chunk_phys[i]; + fusion->rdpq_tracker[i].pool_entry_virt = rdpq_chunk_virt[i]; + } + + for (k = 0; k < dma_alloc_count; k++) { + for (i = 0; i < RDPQ_MAX_INDEX_IN_ONE_CHUNK; i++) { + abs_index = (k * RDPQ_MAX_INDEX_IN_ONE_CHUNK) + i; + + if (abs_index == msix_count) + break; + offset = fusion->reply_alloc_sz * i; + fusion->rdpq_virt[abs_index].RDPQBaseAddress = + cpu_to_le64(rdpq_chunk_phys[k] + offset); + fusion->reply_frames_desc_phys[abs_index] = + rdpq_chunk_phys[k] + offset; + fusion->reply_frames_desc[abs_index] = + (union MPI2_REPLY_DESCRIPTORS_UNION *)((u8 *)rdpq_chunk_virt[k] + offset); + + reply_desc = fusion->reply_frames_desc[abs_index]; + for (j = 0; j < fusion->reply_q_depth; j++, reply_desc++) + reply_desc->Words = ULLONG_MAX; + } + } + + return 0; +} + +static void +megasas_free_rdpq_fusion(struct megasas_instance *instance) { + + int i; + struct fusion_context *fusion; + + fusion = instance->ctrl_context; + + for (i = 0; i < RDPQ_MAX_CHUNK_COUNT; i++) { + if (fusion->rdpq_tracker[i].pool_entry_virt) + dma_pool_free(fusion->rdpq_tracker[i].dma_pool_ptr, + fusion->rdpq_tracker[i].pool_entry_virt, + fusion->rdpq_tracker[i].pool_entry_phys); + + } + + dma_pool_destroy(fusion->reply_frames_desc_pool); + dma_pool_destroy(fusion->reply_frames_desc_pool_align); + + if (fusion->rdpq_virt) + dma_free_coherent(&instance->pdev->dev, + sizeof(struct MPI2_IOC_INIT_RDPQ_ARRAY_ENTRY) * MAX_MSIX_QUEUES_FUSION, + fusion->rdpq_virt, fusion->rdpq_phys); +} + +static void +megasas_free_reply_fusion(struct megasas_instance *instance) { + + struct fusion_context *fusion; + + fusion = instance->ctrl_context; + + if (fusion->reply_frames_desc[0]) + dma_pool_free(fusion->reply_frames_desc_pool, + fusion->reply_frames_desc[0], + fusion->reply_frames_desc_phys[0]); + + dma_pool_destroy(fusion->reply_frames_desc_pool); + +} + + +/** + * megasas_alloc_cmds_fusion - Allocates the command packets + * @instance: Adapter soft state + * + * + * Each frame has a 32-bit field called context. This context is used to get + * back the megasas_cmd_fusion from the frame when a frame gets completed + * In this driver, the 32 bit values are the indices into an array cmd_list. + * This array is used only to look up the megasas_cmd_fusion given the context. + * The free commands themselves are maintained in a linked list called cmd_pool. + * + * cmds are formed in the io_request and sg_frame members of the + * megasas_cmd_fusion. The context field is used to get a request descriptor + * and is used as SMID of the cmd. + * SMID value range is from 1 to max_fw_cmds. + */ +static int +megasas_alloc_cmds_fusion(struct megasas_instance *instance) +{ + int i; + struct fusion_context *fusion; + struct megasas_cmd_fusion *cmd; + u32 offset; + dma_addr_t io_req_base_phys; + u8 *io_req_base; + + + fusion = instance->ctrl_context; + + if (megasas_alloc_request_fusion(instance)) + goto fail_exit; + + if (instance->is_rdpq) { + if (megasas_alloc_rdpq_fusion(instance)) + goto fail_exit; + } else + if (megasas_alloc_reply_fusion(instance)) + goto fail_exit; + + if (megasas_alloc_cmdlist_fusion(instance)) + goto fail_exit; + + dev_info(&instance->pdev->dev, "Configured max firmware commands: %d\n", + instance->max_fw_cmds); + + /* The first 256 bytes (SMID 0) is not used. Don't add to the cmd list */ + io_req_base = fusion->io_request_frames + MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE; + io_req_base_phys = fusion->io_request_frames_phys + MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE; + + /* + * Add all the commands to command pool (fusion->cmd_pool) + */ + + /* SMID 0 is reserved. Set SMID/index from 1 */ + for (i = 0; i < instance->max_mpt_cmds; i++) { + cmd = fusion->cmd_list[i]; + offset = MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE * i; + memset(cmd, 0, sizeof(struct megasas_cmd_fusion)); + cmd->index = i + 1; + cmd->scmd = NULL; + cmd->sync_cmd_idx = + (i >= instance->max_scsi_cmds && i < instance->max_fw_cmds) ? + (i - instance->max_scsi_cmds) : + (u32)ULONG_MAX; /* Set to Invalid */ + cmd->instance = instance; + cmd->io_request = + (struct MPI2_RAID_SCSI_IO_REQUEST *) + (io_req_base + offset); + memset(cmd->io_request, 0, + sizeof(struct MPI2_RAID_SCSI_IO_REQUEST)); + cmd->io_request_phys_addr = io_req_base_phys + offset; + cmd->r1_alt_dev_handle = MR_DEVHANDLE_INVALID; + } + + if (megasas_create_sg_sense_fusion(instance)) + goto fail_exit; + + return 0; + +fail_exit: + megasas_free_cmds_fusion(instance); + return -ENOMEM; +} + +/** + * wait_and_poll - Issues a polling command + * @instance: Adapter soft state + * @cmd: Command packet to be issued + * @seconds: Maximum poll time + * + * For polling, MFI requires the cmd_status to be set to 0xFF before posting. + */ +int +wait_and_poll(struct megasas_instance *instance, struct megasas_cmd *cmd, + int seconds) +{ + int i; + struct megasas_header *frame_hdr = &cmd->frame->hdr; + u32 status_reg; + + u32 msecs = seconds * 1000; + + /* + * Wait for cmd_status to change + */ + for (i = 0; (i < msecs) && (frame_hdr->cmd_status == 0xff); i += 20) { + rmb(); + msleep(20); + if (!(i % 5000)) { + status_reg = instance->instancet->read_fw_status_reg(instance) + & MFI_STATE_MASK; + if (status_reg == MFI_STATE_FAULT) + break; + } + } + + if (frame_hdr->cmd_status == MFI_STAT_INVALID_STATUS) + return DCMD_TIMEOUT; + else if (frame_hdr->cmd_status == MFI_STAT_OK) + return DCMD_SUCCESS; + else + return DCMD_FAILED; +} + +/** + * megasas_ioc_init_fusion - Initializes the FW + * @instance: Adapter soft state + * + * Issues the IOC Init cmd + */ +int +megasas_ioc_init_fusion(struct megasas_instance *instance) +{ + struct megasas_init_frame *init_frame; + struct MPI2_IOC_INIT_REQUEST *IOCInitMessage = NULL; + dma_addr_t ioc_init_handle; + struct megasas_cmd *cmd; + u8 ret, cur_rdpq_mode; + struct fusion_context *fusion; + union MEGASAS_REQUEST_DESCRIPTOR_UNION req_desc; + int i; + struct megasas_header *frame_hdr; + const char *sys_info; + MFI_CAPABILITIES *drv_ops; + u32 scratch_pad_1; + ktime_t time; + bool cur_fw_64bit_dma_capable; + bool cur_intr_coalescing; + + fusion = instance->ctrl_context; + + ioc_init_handle = fusion->ioc_init_request_phys; + IOCInitMessage = fusion->ioc_init_request; + + cmd = fusion->ioc_init_cmd; + + scratch_pad_1 = megasas_readl + (instance, &instance->reg_set->outbound_scratch_pad_1); + + cur_rdpq_mode = (scratch_pad_1 & MR_RDPQ_MODE_OFFSET) ? 1 : 0; + + if (instance->adapter_type == INVADER_SERIES) { + cur_fw_64bit_dma_capable = + (scratch_pad_1 & MR_CAN_HANDLE_64_BIT_DMA_OFFSET) ? true : false; + + if (instance->consistent_mask_64bit && !cur_fw_64bit_dma_capable) { + dev_err(&instance->pdev->dev, "Driver was operating on 64bit " + "DMA mask, but upcoming FW does not support 64bit DMA mask\n"); + megaraid_sas_kill_hba(instance); + ret = 1; + goto fail_fw_init; + } + } + + if (instance->is_rdpq && !cur_rdpq_mode) { + dev_err(&instance->pdev->dev, "Firmware downgrade *NOT SUPPORTED*" + " from RDPQ mode to non RDPQ mode\n"); + ret = 1; + goto fail_fw_init; + } + + cur_intr_coalescing = (scratch_pad_1 & MR_INTR_COALESCING_SUPPORT_OFFSET) ? + true : false; + + if ((instance->low_latency_index_start == + MR_HIGH_IOPS_QUEUE_COUNT) && cur_intr_coalescing) + instance->perf_mode = MR_BALANCED_PERF_MODE; + + dev_info(&instance->pdev->dev, "Performance mode :%s\n", + MEGASAS_PERF_MODE_2STR(instance->perf_mode)); + + instance->fw_sync_cache_support = (scratch_pad_1 & + MR_CAN_HANDLE_SYNC_CACHE_OFFSET) ? 1 : 0; + dev_info(&instance->pdev->dev, "FW supports sync cache\t: %s\n", + instance->fw_sync_cache_support ? "Yes" : "No"); + + memset(IOCInitMessage, 0, sizeof(struct MPI2_IOC_INIT_REQUEST)); + + IOCInitMessage->Function = MPI2_FUNCTION_IOC_INIT; + IOCInitMessage->WhoInit = MPI2_WHOINIT_HOST_DRIVER; + IOCInitMessage->MsgVersion = cpu_to_le16(MPI2_VERSION); + IOCInitMessage->HeaderVersion = cpu_to_le16(MPI2_HEADER_VERSION); + IOCInitMessage->SystemRequestFrameSize = cpu_to_le16(MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE / 4); + + IOCInitMessage->ReplyDescriptorPostQueueDepth = cpu_to_le16(fusion->reply_q_depth); + IOCInitMessage->ReplyDescriptorPostQueueAddress = instance->is_rdpq ? + cpu_to_le64(fusion->rdpq_phys) : + cpu_to_le64(fusion->reply_frames_desc_phys[0]); + IOCInitMessage->MsgFlags = instance->is_rdpq ? + MPI2_IOCINIT_MSGFLAG_RDPQ_ARRAY_MODE : 0; + IOCInitMessage->SystemRequestFrameBaseAddress = cpu_to_le64(fusion->io_request_frames_phys); + IOCInitMessage->SenseBufferAddressHigh = cpu_to_le32(upper_32_bits(fusion->sense_phys_addr)); + IOCInitMessage->HostMSIxVectors = instance->msix_vectors; + IOCInitMessage->HostPageSize = MR_DEFAULT_NVME_PAGE_SHIFT; + + time = ktime_get_real(); + /* Convert to milliseconds as per FW requirement */ + IOCInitMessage->TimeStamp = cpu_to_le64(ktime_to_ms(time)); + + init_frame = (struct megasas_init_frame *)cmd->frame; + memset(init_frame, 0, IOC_INIT_FRAME_SIZE); + + frame_hdr = &cmd->frame->hdr; + frame_hdr->cmd_status = 0xFF; + frame_hdr->flags |= cpu_to_le16(MFI_FRAME_DONT_POST_IN_REPLY_QUEUE); + + init_frame->cmd = MFI_CMD_INIT; + init_frame->cmd_status = 0xFF; + + drv_ops = (MFI_CAPABILITIES *) &(init_frame->driver_operations); + + /* driver support Extended MSIX */ + if (instance->adapter_type >= INVADER_SERIES) + drv_ops->mfi_capabilities.support_additional_msix = 1; + /* driver supports HA / Remote LUN over Fast Path interface */ + drv_ops->mfi_capabilities.support_fp_remote_lun = 1; + + drv_ops->mfi_capabilities.support_max_255lds = 1; + drv_ops->mfi_capabilities.support_ndrive_r1_lb = 1; + drv_ops->mfi_capabilities.security_protocol_cmds_fw = 1; + + if (instance->max_chain_frame_sz > MEGASAS_CHAIN_FRAME_SZ_MIN) + drv_ops->mfi_capabilities.support_ext_io_size = 1; + + drv_ops->mfi_capabilities.support_fp_rlbypass = 1; + if (!dual_qdepth_disable) + drv_ops->mfi_capabilities.support_ext_queue_depth = 1; + + drv_ops->mfi_capabilities.support_qd_throttling = 1; + drv_ops->mfi_capabilities.support_pd_map_target_id = 1; + drv_ops->mfi_capabilities.support_nvme_passthru = 1; + drv_ops->mfi_capabilities.support_fw_exposed_dev_list = 1; + + if (instance->consistent_mask_64bit) + drv_ops->mfi_capabilities.support_64bit_mode = 1; + + /* Convert capability to LE32 */ + cpu_to_le32s((u32 *)&init_frame->driver_operations.mfi_capabilities); + + sys_info = dmi_get_system_info(DMI_PRODUCT_UUID); + if (instance->system_info_buf && sys_info) { + memcpy(instance->system_info_buf->systemId, sys_info, + strlen(sys_info) > 64 ? 64 : strlen(sys_info)); + instance->system_info_buf->systemIdLength = + strlen(sys_info) > 64 ? 64 : strlen(sys_info); + init_frame->system_info_lo = cpu_to_le32(lower_32_bits(instance->system_info_h)); + init_frame->system_info_hi = cpu_to_le32(upper_32_bits(instance->system_info_h)); + } + + init_frame->queue_info_new_phys_addr_hi = + cpu_to_le32(upper_32_bits(ioc_init_handle)); + init_frame->queue_info_new_phys_addr_lo = + cpu_to_le32(lower_32_bits(ioc_init_handle)); + init_frame->data_xfer_len = cpu_to_le32(sizeof(struct MPI2_IOC_INIT_REQUEST)); + + /* + * Each bit in replyqueue_mask represents one group of MSI-x vectors + * (each group has 8 vectors) + */ + switch (instance->perf_mode) { + case MR_BALANCED_PERF_MODE: + init_frame->replyqueue_mask = + cpu_to_le16(~(~0 << instance->low_latency_index_start/8)); + break; + case MR_IOPS_PERF_MODE: + init_frame->replyqueue_mask = + cpu_to_le16(~(~0 << instance->msix_vectors/8)); + break; + } + + + req_desc.u.low = cpu_to_le32(lower_32_bits(cmd->frame_phys_addr)); + req_desc.u.high = cpu_to_le32(upper_32_bits(cmd->frame_phys_addr)); + req_desc.MFAIo.RequestFlags = + (MEGASAS_REQ_DESCRIPT_FLAGS_MFA << + MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT); + + /* + * disable the intr before firing the init frame + */ + instance->instancet->disable_intr(instance); + + for (i = 0; i < (10 * 1000); i += 20) { + if (megasas_readl(instance, &instance->reg_set->doorbell) & 1) + msleep(20); + else + break; + } + + /* For AERO also, IOC_INIT requires 64 bit descriptor write */ + megasas_write_64bit_req_desc(instance, &req_desc); + + wait_and_poll(instance, cmd, MFI_IO_TIMEOUT_SECS); + + frame_hdr = &cmd->frame->hdr; + if (frame_hdr->cmd_status != 0) { + ret = 1; + goto fail_fw_init; + } + + if (instance->adapter_type >= AERO_SERIES) { + scratch_pad_1 = megasas_readl + (instance, &instance->reg_set->outbound_scratch_pad_1); + + instance->atomic_desc_support = + (scratch_pad_1 & MR_ATOMIC_DESCRIPTOR_SUPPORT_OFFSET) ? 1 : 0; + + dev_info(&instance->pdev->dev, "FW supports atomic descriptor\t: %s\n", + instance->atomic_desc_support ? "Yes" : "No"); + } + + return 0; + +fail_fw_init: + dev_err(&instance->pdev->dev, + "Init cmd return status FAILED for SCSI host %d\n", + instance->host->host_no); + + return ret; +} + +/** + * megasas_sync_pd_seq_num - JBOD SEQ MAP + * @instance: Adapter soft state + * @pend: set to 1, if it is pended jbod map. + * + * Issue Jbod map to the firmware. If it is pended command, + * issue command and return. If it is first instance of jbod map + * issue and receive command. + */ +int +megasas_sync_pd_seq_num(struct megasas_instance *instance, bool pend) { + int ret = 0; + size_t pd_seq_map_sz; + struct megasas_cmd *cmd; + struct megasas_dcmd_frame *dcmd; + struct fusion_context *fusion = instance->ctrl_context; + struct MR_PD_CFG_SEQ_NUM_SYNC *pd_sync; + dma_addr_t pd_seq_h; + + pd_sync = (void *)fusion->pd_seq_sync[(instance->pd_seq_map_id & 1)]; + pd_seq_h = fusion->pd_seq_phys[(instance->pd_seq_map_id & 1)]; + pd_seq_map_sz = struct_size(pd_sync, seq, MAX_PHYSICAL_DEVICES - 1); + + cmd = megasas_get_cmd(instance); + if (!cmd) { + dev_err(&instance->pdev->dev, + "Could not get mfi cmd. Fail from %s %d\n", + __func__, __LINE__); + return -ENOMEM; + } + + dcmd = &cmd->frame->dcmd; + + memset(pd_sync, 0, pd_seq_map_sz); + memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE); + + if (pend) { + dcmd->mbox.b[0] = MEGASAS_DCMD_MBOX_PEND_FLAG; + dcmd->flags = MFI_FRAME_DIR_WRITE; + instance->jbod_seq_cmd = cmd; + } else { + dcmd->flags = MFI_FRAME_DIR_READ; + } + + dcmd->cmd = MFI_CMD_DCMD; + dcmd->cmd_status = 0xFF; + dcmd->sge_count = 1; + dcmd->timeout = 0; + dcmd->pad_0 = 0; + dcmd->data_xfer_len = cpu_to_le32(pd_seq_map_sz); + dcmd->opcode = cpu_to_le32(MR_DCMD_SYSTEM_PD_MAP_GET_INFO); + + megasas_set_dma_settings(instance, dcmd, pd_seq_h, pd_seq_map_sz); + + if (pend) { + instance->instancet->issue_dcmd(instance, cmd); + return 0; + } + + /* Below code is only for non pended DCMD */ + if (!instance->mask_interrupts) + ret = megasas_issue_blocked_cmd(instance, cmd, + MFI_IO_TIMEOUT_SECS); + else + ret = megasas_issue_polled(instance, cmd); + + if (le32_to_cpu(pd_sync->count) > MAX_PHYSICAL_DEVICES) { + dev_warn(&instance->pdev->dev, + "driver supports max %d JBOD, but FW reports %d\n", + MAX_PHYSICAL_DEVICES, le32_to_cpu(pd_sync->count)); + ret = -EINVAL; + } + + if (ret == DCMD_TIMEOUT) + dev_warn(&instance->pdev->dev, + "%s DCMD timed out, continue without JBOD sequence map\n", + __func__); + + if (ret == DCMD_SUCCESS) + instance->pd_seq_map_id++; + + megasas_return_cmd(instance, cmd); + return ret; +} + +/* + * megasas_get_ld_map_info - Returns FW's ld_map structure + * @instance: Adapter soft state + * @pend: Pend the command or not + * Issues an internal command (DCMD) to get the FW's controller PD + * list structure. This information is mainly used to find out SYSTEM + * supported by the FW. + * dcmd.mbox value setting for MR_DCMD_LD_MAP_GET_INFO + * dcmd.mbox.b[0] - number of LDs being sync'd + * dcmd.mbox.b[1] - 0 - complete command immediately. + * - 1 - pend till config change + * dcmd.mbox.b[2] - 0 - supports max 64 lds and uses legacy MR_FW_RAID_MAP + * - 1 - supports max MAX_LOGICAL_DRIVES_EXT lds and + * uses extended struct MR_FW_RAID_MAP_EXT + */ +static int +megasas_get_ld_map_info(struct megasas_instance *instance) +{ + int ret = 0; + struct megasas_cmd *cmd; + struct megasas_dcmd_frame *dcmd; + void *ci; + dma_addr_t ci_h = 0; + u32 size_map_info; + struct fusion_context *fusion; + + cmd = megasas_get_cmd(instance); + + if (!cmd) { + dev_printk(KERN_DEBUG, &instance->pdev->dev, "Failed to get cmd for map info\n"); + return -ENOMEM; + } + + fusion = instance->ctrl_context; + + if (!fusion) { + megasas_return_cmd(instance, cmd); + return -ENXIO; + } + + dcmd = &cmd->frame->dcmd; + + size_map_info = fusion->current_map_sz; + + ci = (void *) fusion->ld_map[(instance->map_id & 1)]; + ci_h = fusion->ld_map_phys[(instance->map_id & 1)]; + + if (!ci) { + dev_printk(KERN_DEBUG, &instance->pdev->dev, "Failed to alloc mem for ld_map_info\n"); + megasas_return_cmd(instance, cmd); + return -ENOMEM; + } + + memset(ci, 0, fusion->max_map_sz); + memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE); + dcmd->cmd = MFI_CMD_DCMD; + dcmd->cmd_status = 0xFF; + dcmd->sge_count = 1; + dcmd->flags = MFI_FRAME_DIR_READ; + dcmd->timeout = 0; + dcmd->pad_0 = 0; + dcmd->data_xfer_len = cpu_to_le32(size_map_info); + dcmd->opcode = cpu_to_le32(MR_DCMD_LD_MAP_GET_INFO); + + megasas_set_dma_settings(instance, dcmd, ci_h, size_map_info); + + if (!instance->mask_interrupts) + ret = megasas_issue_blocked_cmd(instance, cmd, + MFI_IO_TIMEOUT_SECS); + else + ret = megasas_issue_polled(instance, cmd); + + if (ret == DCMD_TIMEOUT) + dev_warn(&instance->pdev->dev, + "%s DCMD timed out, RAID map is disabled\n", + __func__); + + megasas_return_cmd(instance, cmd); + + return ret; +} + +u8 +megasas_get_map_info(struct megasas_instance *instance) +{ + struct fusion_context *fusion = instance->ctrl_context; + + fusion->fast_path_io = 0; + if (!megasas_get_ld_map_info(instance)) { + if (MR_ValidateMapInfo(instance, instance->map_id)) { + fusion->fast_path_io = 1; + return 0; + } + } + return 1; +} + +/* + * megasas_sync_map_info - Returns FW's ld_map structure + * @instance: Adapter soft state + * + * Issues an internal command (DCMD) to get the FW's controller PD + * list structure. This information is mainly used to find out SYSTEM + * supported by the FW. + */ +int +megasas_sync_map_info(struct megasas_instance *instance) +{ + int i; + struct megasas_cmd *cmd; + struct megasas_dcmd_frame *dcmd; + u16 num_lds; + struct fusion_context *fusion; + struct MR_LD_TARGET_SYNC *ci = NULL; + struct MR_DRV_RAID_MAP_ALL *map; + struct MR_LD_RAID *raid; + struct MR_LD_TARGET_SYNC *ld_sync; + dma_addr_t ci_h = 0; + u32 size_map_info; + + cmd = megasas_get_cmd(instance); + + if (!cmd) { + dev_printk(KERN_DEBUG, &instance->pdev->dev, "Failed to get cmd for sync info\n"); + return -ENOMEM; + } + + fusion = instance->ctrl_context; + + if (!fusion) { + megasas_return_cmd(instance, cmd); + return 1; + } + + map = fusion->ld_drv_map[instance->map_id & 1]; + + num_lds = le16_to_cpu(map->raidMap.ldCount); + + dcmd = &cmd->frame->dcmd; + + memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE); + + ci = (struct MR_LD_TARGET_SYNC *) + fusion->ld_map[(instance->map_id - 1) & 1]; + memset(ci, 0, fusion->max_map_sz); + + ci_h = fusion->ld_map_phys[(instance->map_id - 1) & 1]; + + ld_sync = (struct MR_LD_TARGET_SYNC *)ci; + + for (i = 0; i < num_lds; i++, ld_sync++) { + raid = MR_LdRaidGet(i, map); + ld_sync->targetId = MR_GetLDTgtId(i, map); + ld_sync->seqNum = raid->seqNum; + } + + size_map_info = fusion->current_map_sz; + + dcmd->cmd = MFI_CMD_DCMD; + dcmd->cmd_status = 0xFF; + dcmd->sge_count = 1; + dcmd->flags = MFI_FRAME_DIR_WRITE; + dcmd->timeout = 0; + dcmd->pad_0 = 0; + dcmd->data_xfer_len = cpu_to_le32(size_map_info); + dcmd->mbox.b[0] = num_lds; + dcmd->mbox.b[1] = MEGASAS_DCMD_MBOX_PEND_FLAG; + dcmd->opcode = cpu_to_le32(MR_DCMD_LD_MAP_GET_INFO); + + megasas_set_dma_settings(instance, dcmd, ci_h, size_map_info); + + instance->map_update_cmd = cmd; + + instance->instancet->issue_dcmd(instance, cmd); + + return 0; +} + +/* + * meagasas_display_intel_branding - Display branding string + * @instance: per adapter object + * + * Return nothing. + */ +static void +megasas_display_intel_branding(struct megasas_instance *instance) +{ + if (instance->pdev->subsystem_vendor != PCI_VENDOR_ID_INTEL) + return; + + switch (instance->pdev->device) { + case PCI_DEVICE_ID_LSI_INVADER: + switch (instance->pdev->subsystem_device) { + case MEGARAID_INTEL_RS3DC080_SSDID: + dev_info(&instance->pdev->dev, "scsi host %d: %s\n", + instance->host->host_no, + MEGARAID_INTEL_RS3DC080_BRANDING); + break; + case MEGARAID_INTEL_RS3DC040_SSDID: + dev_info(&instance->pdev->dev, "scsi host %d: %s\n", + instance->host->host_no, + MEGARAID_INTEL_RS3DC040_BRANDING); + break; + case MEGARAID_INTEL_RS3SC008_SSDID: + dev_info(&instance->pdev->dev, "scsi host %d: %s\n", + instance->host->host_no, + MEGARAID_INTEL_RS3SC008_BRANDING); + break; + case MEGARAID_INTEL_RS3MC044_SSDID: + dev_info(&instance->pdev->dev, "scsi host %d: %s\n", + instance->host->host_no, + MEGARAID_INTEL_RS3MC044_BRANDING); + break; + default: + break; + } + break; + case PCI_DEVICE_ID_LSI_FURY: + switch (instance->pdev->subsystem_device) { + case MEGARAID_INTEL_RS3WC080_SSDID: + dev_info(&instance->pdev->dev, "scsi host %d: %s\n", + instance->host->host_no, + MEGARAID_INTEL_RS3WC080_BRANDING); + break; + case MEGARAID_INTEL_RS3WC040_SSDID: + dev_info(&instance->pdev->dev, "scsi host %d: %s\n", + instance->host->host_no, + MEGARAID_INTEL_RS3WC040_BRANDING); + break; + default: + break; + } + break; + case PCI_DEVICE_ID_LSI_CUTLASS_52: + case PCI_DEVICE_ID_LSI_CUTLASS_53: + switch (instance->pdev->subsystem_device) { + case MEGARAID_INTEL_RMS3BC160_SSDID: + dev_info(&instance->pdev->dev, "scsi host %d: %s\n", + instance->host->host_no, + MEGARAID_INTEL_RMS3BC160_BRANDING); + break; + default: + break; + } + break; + default: + break; + } +} + +/** + * megasas_allocate_raid_maps - Allocate memory for RAID maps + * @instance: Adapter soft state + * + * return: if success: return 0 + * failed: return -ENOMEM + */ +static inline int megasas_allocate_raid_maps(struct megasas_instance *instance) +{ + struct fusion_context *fusion; + int i = 0; + + fusion = instance->ctrl_context; + + fusion->drv_map_pages = get_order(fusion->drv_map_sz); + + for (i = 0; i < 2; i++) { + fusion->ld_map[i] = NULL; + + fusion->ld_drv_map[i] = (void *) + __get_free_pages(__GFP_ZERO | GFP_KERNEL, + fusion->drv_map_pages); + + if (!fusion->ld_drv_map[i]) { + fusion->ld_drv_map[i] = vzalloc(fusion->drv_map_sz); + + if (!fusion->ld_drv_map[i]) { + dev_err(&instance->pdev->dev, + "Could not allocate memory for local map" + " size requested: %d\n", + fusion->drv_map_sz); + goto ld_drv_map_alloc_fail; + } + } + } + + for (i = 0; i < 2; i++) { + fusion->ld_map[i] = dma_alloc_coherent(&instance->pdev->dev, + fusion->max_map_sz, + &fusion->ld_map_phys[i], + GFP_KERNEL); + if (!fusion->ld_map[i]) { + dev_err(&instance->pdev->dev, + "Could not allocate memory for map info %s:%d\n", + __func__, __LINE__); + goto ld_map_alloc_fail; + } + } + + return 0; + +ld_map_alloc_fail: + for (i = 0; i < 2; i++) { + if (fusion->ld_map[i]) + dma_free_coherent(&instance->pdev->dev, + fusion->max_map_sz, + fusion->ld_map[i], + fusion->ld_map_phys[i]); + } + +ld_drv_map_alloc_fail: + for (i = 0; i < 2; i++) { + if (fusion->ld_drv_map[i]) { + if (is_vmalloc_addr(fusion->ld_drv_map[i])) + vfree(fusion->ld_drv_map[i]); + else + free_pages((ulong)fusion->ld_drv_map[i], + fusion->drv_map_pages); + } + } + + return -ENOMEM; +} + +/** + * megasas_configure_queue_sizes - Calculate size of request desc queue, + * reply desc queue, + * IO request frame queue, set can_queue. + * @instance: Adapter soft state + * @return: void + */ +static inline +void megasas_configure_queue_sizes(struct megasas_instance *instance) +{ + struct fusion_context *fusion; + u16 max_cmd; + + fusion = instance->ctrl_context; + max_cmd = instance->max_fw_cmds; + + if (instance->adapter_type >= VENTURA_SERIES) + instance->max_mpt_cmds = instance->max_fw_cmds * RAID_1_PEER_CMDS; + else + instance->max_mpt_cmds = instance->max_fw_cmds; + + instance->max_scsi_cmds = instance->max_fw_cmds - instance->max_mfi_cmds; + instance->cur_can_queue = instance->max_scsi_cmds; + instance->host->can_queue = instance->cur_can_queue; + + fusion->reply_q_depth = 2 * ((max_cmd + 1 + 15) / 16) * 16; + + fusion->request_alloc_sz = sizeof(union MEGASAS_REQUEST_DESCRIPTOR_UNION) * + instance->max_mpt_cmds; + fusion->reply_alloc_sz = sizeof(union MPI2_REPLY_DESCRIPTORS_UNION) * + (fusion->reply_q_depth); + fusion->io_frames_alloc_sz = MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE + + (MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE + * (instance->max_mpt_cmds + 1)); /* Extra 1 for SMID 0 */ +} + +static int megasas_alloc_ioc_init_frame(struct megasas_instance *instance) +{ + struct fusion_context *fusion; + struct megasas_cmd *cmd; + + fusion = instance->ctrl_context; + + cmd = kzalloc(sizeof(struct megasas_cmd), GFP_KERNEL); + + if (!cmd) { + dev_err(&instance->pdev->dev, "Failed from func: %s line: %d\n", + __func__, __LINE__); + return -ENOMEM; + } + + cmd->frame = dma_alloc_coherent(&instance->pdev->dev, + IOC_INIT_FRAME_SIZE, + &cmd->frame_phys_addr, GFP_KERNEL); + + if (!cmd->frame) { + dev_err(&instance->pdev->dev, "Failed from func: %s line: %d\n", + __func__, __LINE__); + kfree(cmd); + return -ENOMEM; + } + + fusion->ioc_init_cmd = cmd; + return 0; +} + +/** + * megasas_free_ioc_init_cmd - Free IOC INIT command frame + * @instance: Adapter soft state + */ +static inline void megasas_free_ioc_init_cmd(struct megasas_instance *instance) +{ + struct fusion_context *fusion; + + fusion = instance->ctrl_context; + + if (fusion->ioc_init_cmd && fusion->ioc_init_cmd->frame) + dma_free_coherent(&instance->pdev->dev, + IOC_INIT_FRAME_SIZE, + fusion->ioc_init_cmd->frame, + fusion->ioc_init_cmd->frame_phys_addr); + + kfree(fusion->ioc_init_cmd); +} + +/** + * megasas_init_adapter_fusion - Initializes the FW + * @instance: Adapter soft state + * + * This is the main function for initializing firmware. + */ +static u32 +megasas_init_adapter_fusion(struct megasas_instance *instance) +{ + struct fusion_context *fusion; + u32 scratch_pad_1; + int i = 0, count; + u32 status_reg; + + fusion = instance->ctrl_context; + + megasas_fusion_update_can_queue(instance, PROBE_CONTEXT); + + /* + * Only Driver's internal DCMDs and IOCTL DCMDs needs to have MFI frames + */ + instance->max_mfi_cmds = + MEGASAS_FUSION_INTERNAL_CMDS + MEGASAS_FUSION_IOCTL_CMDS; + + megasas_configure_queue_sizes(instance); + + scratch_pad_1 = megasas_readl(instance, + &instance->reg_set->outbound_scratch_pad_1); + /* If scratch_pad_1 & MEGASAS_MAX_CHAIN_SIZE_UNITS_MASK is set, + * Firmware support extended IO chain frame which is 4 times more than + * legacy Firmware. + * Legacy Firmware - Frame size is (8 * 128) = 1K + * 1M IO Firmware - Frame size is (8 * 128 * 4) = 4K + */ + if (scratch_pad_1 & MEGASAS_MAX_CHAIN_SIZE_UNITS_MASK) + instance->max_chain_frame_sz = + ((scratch_pad_1 & MEGASAS_MAX_CHAIN_SIZE_MASK) >> + MEGASAS_MAX_CHAIN_SHIFT) * MEGASAS_1MB_IO; + else + instance->max_chain_frame_sz = + ((scratch_pad_1 & MEGASAS_MAX_CHAIN_SIZE_MASK) >> + MEGASAS_MAX_CHAIN_SHIFT) * MEGASAS_256K_IO; + + if (instance->max_chain_frame_sz < MEGASAS_CHAIN_FRAME_SZ_MIN) { + dev_warn(&instance->pdev->dev, "frame size %d invalid, fall back to legacy max frame size %d\n", + instance->max_chain_frame_sz, + MEGASAS_CHAIN_FRAME_SZ_MIN); + instance->max_chain_frame_sz = MEGASAS_CHAIN_FRAME_SZ_MIN; + } + + fusion->max_sge_in_main_msg = + (MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE + - offsetof(struct MPI2_RAID_SCSI_IO_REQUEST, SGL))/16; + + fusion->max_sge_in_chain = + instance->max_chain_frame_sz + / sizeof(union MPI2_SGE_IO_UNION); + + instance->max_num_sge = + rounddown_pow_of_two(fusion->max_sge_in_main_msg + + fusion->max_sge_in_chain - 2); + + /* Used for pass thru MFI frame (DCMD) */ + fusion->chain_offset_mfi_pthru = + offsetof(struct MPI2_RAID_SCSI_IO_REQUEST, SGL)/16; + + fusion->chain_offset_io_request = + (MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE - + sizeof(union MPI2_SGE_IO_UNION))/16; + + count = instance->msix_vectors > 0 ? instance->msix_vectors : 1; + for (i = 0 ; i < count; i++) + fusion->last_reply_idx[i] = 0; + + /* + * For fusion adapters, 3 commands for IOCTL and 8 commands + * for driver's internal DCMDs. + */ + instance->max_scsi_cmds = instance->max_fw_cmds - + (MEGASAS_FUSION_INTERNAL_CMDS + + MEGASAS_FUSION_IOCTL_CMDS); + sema_init(&instance->ioctl_sem, MEGASAS_FUSION_IOCTL_CMDS); + + if (megasas_alloc_ioc_init_frame(instance)) + return 1; + + /* + * Allocate memory for descriptors + * Create a pool of commands + */ + if (megasas_alloc_cmds(instance)) + goto fail_alloc_mfi_cmds; + if (megasas_alloc_cmds_fusion(instance)) + goto fail_alloc_cmds; + + if (megasas_ioc_init_fusion(instance)) { + status_reg = instance->instancet->read_fw_status_reg(instance); + if (((status_reg & MFI_STATE_MASK) == MFI_STATE_FAULT) && + (status_reg & MFI_RESET_ADAPTER)) { + /* Do a chip reset and then retry IOC INIT once */ + if (megasas_adp_reset_wait_for_ready + (instance, true, 0) == FAILED) + goto fail_ioc_init; + + if (megasas_ioc_init_fusion(instance)) + goto fail_ioc_init; + } else { + goto fail_ioc_init; + } + } + + megasas_display_intel_branding(instance); + if (megasas_get_ctrl_info(instance)) { + dev_err(&instance->pdev->dev, + "Could not get controller info. Fail from %s %d\n", + __func__, __LINE__); + goto fail_ioc_init; + } + + instance->flag_ieee = 1; + instance->r1_ldio_hint_default = MR_R1_LDIO_PIGGYBACK_DEFAULT; + instance->threshold_reply_count = instance->max_fw_cmds / 4; + fusion->fast_path_io = 0; + + if (megasas_allocate_raid_maps(instance)) + goto fail_ioc_init; + + if (!megasas_get_map_info(instance)) + megasas_sync_map_info(instance); + + return 0; + +fail_ioc_init: + megasas_free_cmds_fusion(instance); +fail_alloc_cmds: + megasas_free_cmds(instance); +fail_alloc_mfi_cmds: + megasas_free_ioc_init_cmd(instance); + return 1; +} + +/** + * megasas_fault_detect_work - Worker function of + * FW fault handling workqueue. + * @work: FW fault work struct + */ +static void +megasas_fault_detect_work(struct work_struct *work) +{ + struct megasas_instance *instance = + container_of(work, struct megasas_instance, + fw_fault_work.work); + u32 fw_state, dma_state, status; + + /* Check the fw state */ + fw_state = instance->instancet->read_fw_status_reg(instance) & + MFI_STATE_MASK; + + if (fw_state == MFI_STATE_FAULT) { + dma_state = instance->instancet->read_fw_status_reg(instance) & + MFI_STATE_DMADONE; + /* Start collecting crash, if DMA bit is done */ + if (instance->crash_dump_drv_support && + instance->crash_dump_app_support && dma_state) { + megasas_fusion_crash_dump(instance); + } else { + if (instance->unload == 0) { + status = megasas_reset_fusion(instance->host, 0); + if (status != SUCCESS) { + dev_err(&instance->pdev->dev, + "Failed from %s %d, do not re-arm timer\n", + __func__, __LINE__); + return; + } + } + } + } + + if (instance->fw_fault_work_q) + queue_delayed_work(instance->fw_fault_work_q, + &instance->fw_fault_work, + msecs_to_jiffies(MEGASAS_WATCHDOG_THREAD_INTERVAL)); +} + +int +megasas_fusion_start_watchdog(struct megasas_instance *instance) +{ + /* Check if the Fault WQ is already started */ + if (instance->fw_fault_work_q) + return SUCCESS; + + INIT_DELAYED_WORK(&instance->fw_fault_work, megasas_fault_detect_work); + + snprintf(instance->fault_handler_work_q_name, + sizeof(instance->fault_handler_work_q_name), + "poll_megasas%d_status", instance->host->host_no); + + instance->fw_fault_work_q = + create_singlethread_workqueue(instance->fault_handler_work_q_name); + if (!instance->fw_fault_work_q) { + dev_err(&instance->pdev->dev, "Failed from %s %d\n", + __func__, __LINE__); + return FAILED; + } + + queue_delayed_work(instance->fw_fault_work_q, + &instance->fw_fault_work, + msecs_to_jiffies(MEGASAS_WATCHDOG_THREAD_INTERVAL)); + + return SUCCESS; +} + +void +megasas_fusion_stop_watchdog(struct megasas_instance *instance) +{ + struct workqueue_struct *wq; + + if (instance->fw_fault_work_q) { + wq = instance->fw_fault_work_q; + instance->fw_fault_work_q = NULL; + if (!cancel_delayed_work_sync(&instance->fw_fault_work)) + flush_workqueue(wq); + destroy_workqueue(wq); + } +} + +/** + * map_cmd_status - Maps FW cmd status to OS cmd status + * @fusion: fusion context + * @scmd: Pointer to cmd + * @status: status of cmd returned by FW + * @ext_status: ext status of cmd returned by FW + * @data_length: command data length + * @sense: command sense data + */ +static void +map_cmd_status(struct fusion_context *fusion, + struct scsi_cmnd *scmd, u8 status, u8 ext_status, + u32 data_length, u8 *sense) +{ + u8 cmd_type; + int resid; + + cmd_type = megasas_cmd_type(scmd); + switch (status) { + + case MFI_STAT_OK: + scmd->result = DID_OK << 16; + break; + + case MFI_STAT_SCSI_IO_FAILED: + case MFI_STAT_LD_INIT_IN_PROGRESS: + scmd->result = (DID_ERROR << 16) | ext_status; + break; + + case MFI_STAT_SCSI_DONE_WITH_ERROR: + + scmd->result = (DID_OK << 16) | ext_status; + if (ext_status == SAM_STAT_CHECK_CONDITION) { + memset(scmd->sense_buffer, 0, + SCSI_SENSE_BUFFERSIZE); + memcpy(scmd->sense_buffer, sense, + SCSI_SENSE_BUFFERSIZE); + scmd->result |= DRIVER_SENSE << 24; + } + + /* + * If the IO request is partially completed, then MR FW will + * update "io_request->DataLength" field with actual number of + * bytes transferred.Driver will set residual bytes count in + * SCSI command structure. + */ + resid = (scsi_bufflen(scmd) - data_length); + scsi_set_resid(scmd, resid); + + if (resid && + ((cmd_type == READ_WRITE_LDIO) || + (cmd_type == READ_WRITE_SYSPDIO))) + scmd_printk(KERN_INFO, scmd, "BRCM Debug mfi stat 0x%x, data len" + " requested/completed 0x%x/0x%x\n", + status, scsi_bufflen(scmd), data_length); + break; + + case MFI_STAT_LD_OFFLINE: + case MFI_STAT_DEVICE_NOT_FOUND: + scmd->result = DID_BAD_TARGET << 16; + break; + case MFI_STAT_CONFIG_SEQ_MISMATCH: + scmd->result = DID_IMM_RETRY << 16; + break; + default: + scmd->result = DID_ERROR << 16; + break; + } +} + +/** + * megasas_is_prp_possible - + * Checks if native NVMe PRPs can be built for the IO + * + * @instance: Adapter soft state + * @scmd: SCSI command from the mid-layer + * @sge_count: scatter gather element count. + * + * Returns: true: PRPs can be built + * false: IEEE SGLs needs to be built + */ +static bool +megasas_is_prp_possible(struct megasas_instance *instance, + struct scsi_cmnd *scmd, int sge_count) +{ + u32 data_length = 0; + struct scatterlist *sg_scmd; + bool build_prp = false; + u32 mr_nvme_pg_size; + + mr_nvme_pg_size = max_t(u32, instance->nvme_page_size, + MR_DEFAULT_NVME_PAGE_SIZE); + data_length = scsi_bufflen(scmd); + sg_scmd = scsi_sglist(scmd); + + /* + * NVMe uses one PRP for each page (or part of a page) + * look at the data length - if 4 pages or less then IEEE is OK + * if > 5 pages then we need to build a native SGL + * if > 4 and <= 5 pages, then check physical address of 1st SG entry + * if this first size in the page is >= the residual beyond 4 pages + * then use IEEE, otherwise use native SGL + */ + + if (data_length > (mr_nvme_pg_size * 5)) { + build_prp = true; + } else if ((data_length > (mr_nvme_pg_size * 4)) && + (data_length <= (mr_nvme_pg_size * 5))) { + /* check if 1st SG entry size is < residual beyond 4 pages */ + if (sg_dma_len(sg_scmd) < (data_length - (mr_nvme_pg_size * 4))) + build_prp = true; + } + + return build_prp; +} + +/** + * megasas_make_prp_nvme - + * Prepare PRPs(Physical Region Page)- SGLs specific to NVMe drives only + * + * @instance: Adapter soft state + * @scmd: SCSI command from the mid-layer + * @sgl_ptr: SGL to be filled in + * @cmd: Fusion command frame + * @sge_count: scatter gather element count. + * + * Returns: true: PRPs are built + * false: IEEE SGLs needs to be built + */ +static bool +megasas_make_prp_nvme(struct megasas_instance *instance, struct scsi_cmnd *scmd, + struct MPI25_IEEE_SGE_CHAIN64 *sgl_ptr, + struct megasas_cmd_fusion *cmd, int sge_count) +{ + int sge_len, offset, num_prp_in_chain = 0; + struct MPI25_IEEE_SGE_CHAIN64 *main_chain_element, *ptr_first_sgl; + u64 *ptr_sgl; + dma_addr_t ptr_sgl_phys; + u64 sge_addr; + u32 page_mask, page_mask_result; + struct scatterlist *sg_scmd; + u32 first_prp_len; + bool build_prp = false; + int data_len = scsi_bufflen(scmd); + u32 mr_nvme_pg_size = max_t(u32, instance->nvme_page_size, + MR_DEFAULT_NVME_PAGE_SIZE); + + build_prp = megasas_is_prp_possible(instance, scmd, sge_count); + + if (!build_prp) + return false; + + /* + * Nvme has a very convoluted prp format. One prp is required + * for each page or partial page. Driver need to split up OS sg_list + * entries if it is longer than one page or cross a page + * boundary. Driver also have to insert a PRP list pointer entry as + * the last entry in each physical page of the PRP list. + * + * NOTE: The first PRP "entry" is actually placed in the first + * SGL entry in the main message as IEEE 64 format. The 2nd + * entry in the main message is the chain element, and the rest + * of the PRP entries are built in the contiguous pcie buffer. + */ + page_mask = mr_nvme_pg_size - 1; + ptr_sgl = (u64 *)cmd->sg_frame; + ptr_sgl_phys = cmd->sg_frame_phys_addr; + memset(ptr_sgl, 0, instance->max_chain_frame_sz); + + /* Build chain frame element which holds all prps except first*/ + main_chain_element = (struct MPI25_IEEE_SGE_CHAIN64 *) + ((u8 *)sgl_ptr + sizeof(struct MPI25_IEEE_SGE_CHAIN64)); + + main_chain_element->Address = cpu_to_le64(ptr_sgl_phys); + main_chain_element->NextChainOffset = 0; + main_chain_element->Flags = IEEE_SGE_FLAGS_CHAIN_ELEMENT | + IEEE_SGE_FLAGS_SYSTEM_ADDR | + MPI26_IEEE_SGE_FLAGS_NSF_NVME_PRP; + + /* Build first prp, sge need not to be page aligned*/ + ptr_first_sgl = sgl_ptr; + sg_scmd = scsi_sglist(scmd); + sge_addr = sg_dma_address(sg_scmd); + sge_len = sg_dma_len(sg_scmd); + + offset = (u32)(sge_addr & page_mask); + first_prp_len = mr_nvme_pg_size - offset; + + ptr_first_sgl->Address = cpu_to_le64(sge_addr); + ptr_first_sgl->Length = cpu_to_le32(first_prp_len); + + data_len -= first_prp_len; + + if (sge_len > first_prp_len) { + sge_addr += first_prp_len; + sge_len -= first_prp_len; + } else if (sge_len == first_prp_len) { + sg_scmd = sg_next(sg_scmd); + sge_addr = sg_dma_address(sg_scmd); + sge_len = sg_dma_len(sg_scmd); + } + + for (;;) { + offset = (u32)(sge_addr & page_mask); + + /* Put PRP pointer due to page boundary*/ + page_mask_result = (uintptr_t)(ptr_sgl + 1) & page_mask; + if (unlikely(!page_mask_result)) { + scmd_printk(KERN_NOTICE, + scmd, "page boundary ptr_sgl: 0x%p\n", + ptr_sgl); + ptr_sgl_phys += 8; + *ptr_sgl = cpu_to_le64(ptr_sgl_phys); + ptr_sgl++; + num_prp_in_chain++; + } + + *ptr_sgl = cpu_to_le64(sge_addr); + ptr_sgl++; + ptr_sgl_phys += 8; + num_prp_in_chain++; + + sge_addr += mr_nvme_pg_size; + sge_len -= mr_nvme_pg_size; + data_len -= mr_nvme_pg_size; + + if (data_len <= 0) + break; + + if (sge_len > 0) + continue; + + sg_scmd = sg_next(sg_scmd); + sge_addr = sg_dma_address(sg_scmd); + sge_len = sg_dma_len(sg_scmd); + } + + main_chain_element->Length = + cpu_to_le32(num_prp_in_chain * sizeof(u64)); + + return build_prp; +} + +/** + * megasas_make_sgl_fusion - Prepares 32-bit SGL + * @instance: Adapter soft state + * @scp: SCSI command from the mid-layer + * @sgl_ptr: SGL to be filled in + * @cmd: cmd we are working on + * @sge_count: sge count + * + */ +static void +megasas_make_sgl_fusion(struct megasas_instance *instance, + struct scsi_cmnd *scp, + struct MPI25_IEEE_SGE_CHAIN64 *sgl_ptr, + struct megasas_cmd_fusion *cmd, int sge_count) +{ + int i, sg_processed; + struct scatterlist *os_sgl; + struct fusion_context *fusion; + + fusion = instance->ctrl_context; + + if (instance->adapter_type >= INVADER_SERIES) { + struct MPI25_IEEE_SGE_CHAIN64 *sgl_ptr_end = sgl_ptr; + sgl_ptr_end += fusion->max_sge_in_main_msg - 1; + sgl_ptr_end->Flags = 0; + } + + scsi_for_each_sg(scp, os_sgl, sge_count, i) { + sgl_ptr->Length = cpu_to_le32(sg_dma_len(os_sgl)); + sgl_ptr->Address = cpu_to_le64(sg_dma_address(os_sgl)); + sgl_ptr->Flags = 0; + if (instance->adapter_type >= INVADER_SERIES) + if (i == sge_count - 1) + sgl_ptr->Flags = IEEE_SGE_FLAGS_END_OF_LIST; + sgl_ptr++; + sg_processed = i + 1; + + if ((sg_processed == (fusion->max_sge_in_main_msg - 1)) && + (sge_count > fusion->max_sge_in_main_msg)) { + + struct MPI25_IEEE_SGE_CHAIN64 *sg_chain; + if (instance->adapter_type >= INVADER_SERIES) { + if ((le16_to_cpu(cmd->io_request->IoFlags) & + MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH) != + MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH) + cmd->io_request->ChainOffset = + fusion-> + chain_offset_io_request; + else + cmd->io_request->ChainOffset = 0; + } else + cmd->io_request->ChainOffset = + fusion->chain_offset_io_request; + + sg_chain = sgl_ptr; + /* Prepare chain element */ + sg_chain->NextChainOffset = 0; + if (instance->adapter_type >= INVADER_SERIES) + sg_chain->Flags = IEEE_SGE_FLAGS_CHAIN_ELEMENT; + else + sg_chain->Flags = + (IEEE_SGE_FLAGS_CHAIN_ELEMENT | + MPI2_IEEE_SGE_FLAGS_IOCPLBNTA_ADDR); + sg_chain->Length = cpu_to_le32((sizeof(union MPI2_SGE_IO_UNION) * (sge_count - sg_processed))); + sg_chain->Address = cpu_to_le64(cmd->sg_frame_phys_addr); + + sgl_ptr = + (struct MPI25_IEEE_SGE_CHAIN64 *)cmd->sg_frame; + memset(sgl_ptr, 0, instance->max_chain_frame_sz); + } + } +} + +/** + * megasas_make_sgl - Build Scatter Gather List(SGLs) + * @scp: SCSI command pointer + * @instance: Soft instance of controller + * @cmd: Fusion command pointer + * + * This function will build sgls based on device type. + * For nvme drives, there is different way of building sgls in nvme native + * format- PRPs(Physical Region Page). + * + * Returns the number of sg lists actually used, zero if the sg lists + * is NULL, or -ENOMEM if the mapping failed + */ +static +int megasas_make_sgl(struct megasas_instance *instance, struct scsi_cmnd *scp, + struct megasas_cmd_fusion *cmd) +{ + int sge_count; + bool build_prp = false; + struct MPI25_IEEE_SGE_CHAIN64 *sgl_chain64; + + sge_count = scsi_dma_map(scp); + + if ((sge_count > instance->max_num_sge) || (sge_count <= 0)) + return sge_count; + + sgl_chain64 = (struct MPI25_IEEE_SGE_CHAIN64 *)&cmd->io_request->SGL; + if ((le16_to_cpu(cmd->io_request->IoFlags) & + MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH) && + (cmd->pd_interface == NVME_PD)) + build_prp = megasas_make_prp_nvme(instance, scp, sgl_chain64, + cmd, sge_count); + + if (!build_prp) + megasas_make_sgl_fusion(instance, scp, sgl_chain64, + cmd, sge_count); + + return sge_count; +} + +/** + * megasas_set_pd_lba - Sets PD LBA + * @io_request: IO request + * @cdb_len: cdb length + * @io_info: IO information + * @scp: SCSI command + * @local_map_ptr: Raid map + * @ref_tag: Primary reference tag + * + * Used to set the PD LBA in CDB for FP IOs + */ +static void +megasas_set_pd_lba(struct MPI2_RAID_SCSI_IO_REQUEST *io_request, u8 cdb_len, + struct IO_REQUEST_INFO *io_info, struct scsi_cmnd *scp, + struct MR_DRV_RAID_MAP_ALL *local_map_ptr, u32 ref_tag) +{ + struct MR_LD_RAID *raid; + u16 ld; + u64 start_blk = io_info->pdBlock; + u8 *cdb = io_request->CDB.CDB32; + u32 num_blocks = io_info->numBlocks; + u8 opcode = 0, flagvals = 0, groupnum = 0, control = 0; + + /* Check if T10 PI (DIF) is enabled for this LD */ + ld = MR_TargetIdToLdGet(io_info->ldTgtId, local_map_ptr); + raid = MR_LdRaidGet(ld, local_map_ptr); + if (raid->capability.ldPiMode == MR_PROT_INFO_TYPE_CONTROLLER) { + memset(cdb, 0, sizeof(io_request->CDB.CDB32)); + cdb[0] = MEGASAS_SCSI_VARIABLE_LENGTH_CMD; + cdb[7] = MEGASAS_SCSI_ADDL_CDB_LEN; + + if (scp->sc_data_direction == DMA_FROM_DEVICE) + cdb[9] = MEGASAS_SCSI_SERVICE_ACTION_READ32; + else + cdb[9] = MEGASAS_SCSI_SERVICE_ACTION_WRITE32; + cdb[10] = MEGASAS_RD_WR_PROTECT_CHECK_ALL; + + /* LBA */ + cdb[12] = (u8)((start_blk >> 56) & 0xff); + cdb[13] = (u8)((start_blk >> 48) & 0xff); + cdb[14] = (u8)((start_blk >> 40) & 0xff); + cdb[15] = (u8)((start_blk >> 32) & 0xff); + cdb[16] = (u8)((start_blk >> 24) & 0xff); + cdb[17] = (u8)((start_blk >> 16) & 0xff); + cdb[18] = (u8)((start_blk >> 8) & 0xff); + cdb[19] = (u8)(start_blk & 0xff); + + /* Logical block reference tag */ + io_request->CDB.EEDP32.PrimaryReferenceTag = + cpu_to_be32(ref_tag); + io_request->CDB.EEDP32.PrimaryApplicationTagMask = cpu_to_be16(0xffff); + io_request->IoFlags = cpu_to_le16(32); /* Specify 32-byte cdb */ + + /* Transfer length */ + cdb[28] = (u8)((num_blocks >> 24) & 0xff); + cdb[29] = (u8)((num_blocks >> 16) & 0xff); + cdb[30] = (u8)((num_blocks >> 8) & 0xff); + cdb[31] = (u8)(num_blocks & 0xff); + + /* set SCSI IO EEDPFlags */ + if (scp->sc_data_direction == DMA_FROM_DEVICE) { + io_request->EEDPFlags = cpu_to_le16( + MPI2_SCSIIO_EEDPFLAGS_INC_PRI_REFTAG | + MPI2_SCSIIO_EEDPFLAGS_CHECK_REFTAG | + MPI2_SCSIIO_EEDPFLAGS_CHECK_REMOVE_OP | + MPI2_SCSIIO_EEDPFLAGS_CHECK_APPTAG | + MPI25_SCSIIO_EEDPFLAGS_DO_NOT_DISABLE_MODE | + MPI2_SCSIIO_EEDPFLAGS_CHECK_GUARD); + } else { + io_request->EEDPFlags = cpu_to_le16( + MPI2_SCSIIO_EEDPFLAGS_INC_PRI_REFTAG | + MPI2_SCSIIO_EEDPFLAGS_INSERT_OP); + } + io_request->Control |= cpu_to_le32((0x4 << 26)); + io_request->EEDPBlockSize = cpu_to_le32(scp->device->sector_size); + } else { + /* Some drives don't support 16/12 byte CDB's, convert to 10 */ + if (((cdb_len == 12) || (cdb_len == 16)) && + (start_blk <= 0xffffffff)) { + if (cdb_len == 16) { + opcode = cdb[0] == READ_16 ? READ_10 : WRITE_10; + flagvals = cdb[1]; + groupnum = cdb[14]; + control = cdb[15]; + } else { + opcode = cdb[0] == READ_12 ? READ_10 : WRITE_10; + flagvals = cdb[1]; + groupnum = cdb[10]; + control = cdb[11]; + } + + memset(cdb, 0, sizeof(io_request->CDB.CDB32)); + + cdb[0] = opcode; + cdb[1] = flagvals; + cdb[6] = groupnum; + cdb[9] = control; + + /* Transfer length */ + cdb[8] = (u8)(num_blocks & 0xff); + cdb[7] = (u8)((num_blocks >> 8) & 0xff); + + io_request->IoFlags = cpu_to_le16(10); /* Specify 10-byte cdb */ + cdb_len = 10; + } else if ((cdb_len < 16) && (start_blk > 0xffffffff)) { + /* Convert to 16 byte CDB for large LBA's */ + switch (cdb_len) { + case 6: + opcode = cdb[0] == READ_6 ? READ_16 : WRITE_16; + control = cdb[5]; + break; + case 10: + opcode = + cdb[0] == READ_10 ? READ_16 : WRITE_16; + flagvals = cdb[1]; + groupnum = cdb[6]; + control = cdb[9]; + break; + case 12: + opcode = + cdb[0] == READ_12 ? READ_16 : WRITE_16; + flagvals = cdb[1]; + groupnum = cdb[10]; + control = cdb[11]; + break; + } + + memset(cdb, 0, sizeof(io_request->CDB.CDB32)); + + cdb[0] = opcode; + cdb[1] = flagvals; + cdb[14] = groupnum; + cdb[15] = control; + + /* Transfer length */ + cdb[13] = (u8)(num_blocks & 0xff); + cdb[12] = (u8)((num_blocks >> 8) & 0xff); + cdb[11] = (u8)((num_blocks >> 16) & 0xff); + cdb[10] = (u8)((num_blocks >> 24) & 0xff); + + io_request->IoFlags = cpu_to_le16(16); /* Specify 16-byte cdb */ + cdb_len = 16; + } + + /* Normal case, just load LBA here */ + switch (cdb_len) { + case 6: + { + u8 val = cdb[1] & 0xE0; + cdb[3] = (u8)(start_blk & 0xff); + cdb[2] = (u8)((start_blk >> 8) & 0xff); + cdb[1] = val | ((u8)(start_blk >> 16) & 0x1f); + break; + } + case 10: + cdb[5] = (u8)(start_blk & 0xff); + cdb[4] = (u8)((start_blk >> 8) & 0xff); + cdb[3] = (u8)((start_blk >> 16) & 0xff); + cdb[2] = (u8)((start_blk >> 24) & 0xff); + break; + case 12: + cdb[5] = (u8)(start_blk & 0xff); + cdb[4] = (u8)((start_blk >> 8) & 0xff); + cdb[3] = (u8)((start_blk >> 16) & 0xff); + cdb[2] = (u8)((start_blk >> 24) & 0xff); + break; + case 16: + cdb[9] = (u8)(start_blk & 0xff); + cdb[8] = (u8)((start_blk >> 8) & 0xff); + cdb[7] = (u8)((start_blk >> 16) & 0xff); + cdb[6] = (u8)((start_blk >> 24) & 0xff); + cdb[5] = (u8)((start_blk >> 32) & 0xff); + cdb[4] = (u8)((start_blk >> 40) & 0xff); + cdb[3] = (u8)((start_blk >> 48) & 0xff); + cdb[2] = (u8)((start_blk >> 56) & 0xff); + break; + } + } +} + +/** + * megasas_stream_detect - stream detection on read and and write IOs + * @instance: Adapter soft state + * @cmd: Command to be prepared + * @io_info: IO Request info + * + */ + +/** stream detection on read and and write IOs */ +static void megasas_stream_detect(struct megasas_instance *instance, + struct megasas_cmd_fusion *cmd, + struct IO_REQUEST_INFO *io_info) +{ + struct fusion_context *fusion = instance->ctrl_context; + u32 device_id = io_info->ldTgtId; + struct LD_STREAM_DETECT *current_ld_sd + = fusion->stream_detect_by_ld[device_id]; + u32 *track_stream = ¤t_ld_sd->mru_bit_map, stream_num; + u32 shifted_values, unshifted_values; + u32 index_value_mask, shifted_values_mask; + int i; + bool is_read_ahead = false; + struct STREAM_DETECT *current_sd; + /* find possible stream */ + for (i = 0; i < MAX_STREAMS_TRACKED; ++i) { + stream_num = (*track_stream >> + (i * BITS_PER_INDEX_STREAM)) & + STREAM_MASK; + current_sd = ¤t_ld_sd->stream_track[stream_num]; + /* if we found a stream, update the raid + * context and also update the mruBitMap + */ + /* boundary condition */ + if ((current_sd->next_seq_lba) && + (io_info->ldStartBlock >= current_sd->next_seq_lba) && + (io_info->ldStartBlock <= (current_sd->next_seq_lba + 32)) && + (current_sd->is_read == io_info->isRead)) { + + if ((io_info->ldStartBlock != current_sd->next_seq_lba) && + ((!io_info->isRead) || (!is_read_ahead))) + /* + * Once the API availible we need to change this. + * At this point we are not allowing any gap + */ + continue; + + SET_STREAM_DETECTED(cmd->io_request->RaidContext.raid_context_g35); + current_sd->next_seq_lba = + io_info->ldStartBlock + io_info->numBlocks; + /* + * update the mruBitMap LRU + */ + shifted_values_mask = + (1 << i * BITS_PER_INDEX_STREAM) - 1; + shifted_values = ((*track_stream & shifted_values_mask) + << BITS_PER_INDEX_STREAM); + index_value_mask = + STREAM_MASK << i * BITS_PER_INDEX_STREAM; + unshifted_values = + *track_stream & ~(shifted_values_mask | + index_value_mask); + *track_stream = + unshifted_values | shifted_values | stream_num; + return; + } + } + /* + * if we did not find any stream, create a new one + * from the least recently used + */ + stream_num = (*track_stream >> + ((MAX_STREAMS_TRACKED - 1) * BITS_PER_INDEX_STREAM)) & + STREAM_MASK; + current_sd = ¤t_ld_sd->stream_track[stream_num]; + current_sd->is_read = io_info->isRead; + current_sd->next_seq_lba = io_info->ldStartBlock + io_info->numBlocks; + *track_stream = (((*track_stream & ZERO_LAST_STREAM) << 4) | stream_num); + return; +} + +/** + * megasas_set_raidflag_cpu_affinity - This function sets the cpu + * affinity (cpu of the controller) and raid_flags in the raid context + * based on IO type. + * + * @fusion: Fusion context + * @praid_context: IO RAID context + * @raid: LD raid map + * @fp_possible: Is fast path possible? + * @is_read: Is read IO? + * @scsi_buff_len: SCSI command buffer length + * + */ +static void +megasas_set_raidflag_cpu_affinity(struct fusion_context *fusion, + union RAID_CONTEXT_UNION *praid_context, + struct MR_LD_RAID *raid, bool fp_possible, + u8 is_read, u32 scsi_buff_len) +{ + u8 cpu_sel = MR_RAID_CTX_CPUSEL_0; + struct RAID_CONTEXT_G35 *rctx_g35; + + rctx_g35 = &praid_context->raid_context_g35; + if (fp_possible) { + if (is_read) { + if ((raid->cpuAffinity.pdRead.cpu0) && + (raid->cpuAffinity.pdRead.cpu1)) + cpu_sel = MR_RAID_CTX_CPUSEL_FCFS; + else if (raid->cpuAffinity.pdRead.cpu1) + cpu_sel = MR_RAID_CTX_CPUSEL_1; + } else { + if ((raid->cpuAffinity.pdWrite.cpu0) && + (raid->cpuAffinity.pdWrite.cpu1)) + cpu_sel = MR_RAID_CTX_CPUSEL_FCFS; + else if (raid->cpuAffinity.pdWrite.cpu1) + cpu_sel = MR_RAID_CTX_CPUSEL_1; + /* Fast path cache by pass capable R0/R1 VD */ + if ((raid->level <= 1) && + (raid->capability.fp_cache_bypass_capable)) { + rctx_g35->routing_flags |= + (1 << MR_RAID_CTX_ROUTINGFLAGS_SLD_SHIFT); + rctx_g35->raid_flags = + (MR_RAID_FLAGS_IO_SUB_TYPE_CACHE_BYPASS + << MR_RAID_CTX_RAID_FLAGS_IO_SUB_TYPE_SHIFT); + } + } + } else { + if (is_read) { + if ((raid->cpuAffinity.ldRead.cpu0) && + (raid->cpuAffinity.ldRead.cpu1)) + cpu_sel = MR_RAID_CTX_CPUSEL_FCFS; + else if (raid->cpuAffinity.ldRead.cpu1) + cpu_sel = MR_RAID_CTX_CPUSEL_1; + } else { + if ((raid->cpuAffinity.ldWrite.cpu0) && + (raid->cpuAffinity.ldWrite.cpu1)) + cpu_sel = MR_RAID_CTX_CPUSEL_FCFS; + else if (raid->cpuAffinity.ldWrite.cpu1) + cpu_sel = MR_RAID_CTX_CPUSEL_1; + + if (is_stream_detected(rctx_g35) && + ((raid->level == 5) || (raid->level == 6)) && + (raid->writeMode == MR_RL_WRITE_THROUGH_MODE) && + (cpu_sel == MR_RAID_CTX_CPUSEL_FCFS)) + cpu_sel = MR_RAID_CTX_CPUSEL_0; + } + } + + rctx_g35->routing_flags |= + (cpu_sel << MR_RAID_CTX_ROUTINGFLAGS_CPUSEL_SHIFT); + + /* Always give priority to MR_RAID_FLAGS_IO_SUB_TYPE_LDIO_BW_LIMIT + * vs MR_RAID_FLAGS_IO_SUB_TYPE_CACHE_BYPASS. + * IO Subtype is not bitmap. + */ + if ((fusion->pcie_bw_limitation) && (raid->level == 1) && (!is_read) && + (scsi_buff_len > MR_LARGE_IO_MIN_SIZE)) { + praid_context->raid_context_g35.raid_flags = + (MR_RAID_FLAGS_IO_SUB_TYPE_LDIO_BW_LIMIT + << MR_RAID_CTX_RAID_FLAGS_IO_SUB_TYPE_SHIFT); + } +} + +/** + * megasas_build_ldio_fusion - Prepares IOs to devices + * @instance: Adapter soft state + * @scp: SCSI command + * @cmd: Command to be prepared + * + * Prepares the io_request and chain elements (sg_frame) for IO + * The IO can be for PD (Fast Path) or LD + */ +static void +megasas_build_ldio_fusion(struct megasas_instance *instance, + struct scsi_cmnd *scp, + struct megasas_cmd_fusion *cmd) +{ + bool fp_possible; + u16 ld; + u32 start_lba_lo, start_lba_hi, device_id, datalength = 0; + u32 scsi_buff_len; + struct MPI2_RAID_SCSI_IO_REQUEST *io_request; + struct IO_REQUEST_INFO io_info; + struct fusion_context *fusion; + struct MR_DRV_RAID_MAP_ALL *local_map_ptr; + u8 *raidLUN; + unsigned long spinlock_flags; + struct MR_LD_RAID *raid = NULL; + struct MR_PRIV_DEVICE *mrdev_priv; + struct RAID_CONTEXT *rctx; + struct RAID_CONTEXT_G35 *rctx_g35; + + device_id = MEGASAS_DEV_INDEX(scp); + + fusion = instance->ctrl_context; + + io_request = cmd->io_request; + rctx = &io_request->RaidContext.raid_context; + rctx_g35 = &io_request->RaidContext.raid_context_g35; + + rctx->virtual_disk_tgt_id = cpu_to_le16(device_id); + rctx->status = 0; + rctx->ex_status = 0; + + start_lba_lo = 0; + start_lba_hi = 0; + fp_possible = false; + + /* + * 6-byte READ(0x08) or WRITE(0x0A) cdb + */ + if (scp->cmd_len == 6) { + datalength = (u32) scp->cmnd[4]; + start_lba_lo = ((u32) scp->cmnd[1] << 16) | + ((u32) scp->cmnd[2] << 8) | (u32) scp->cmnd[3]; + + start_lba_lo &= 0x1FFFFF; + } + + /* + * 10-byte READ(0x28) or WRITE(0x2A) cdb + */ + else if (scp->cmd_len == 10) { + datalength = (u32) scp->cmnd[8] | + ((u32) scp->cmnd[7] << 8); + start_lba_lo = ((u32) scp->cmnd[2] << 24) | + ((u32) scp->cmnd[3] << 16) | + ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5]; + } + + /* + * 12-byte READ(0xA8) or WRITE(0xAA) cdb + */ + else if (scp->cmd_len == 12) { + datalength = ((u32) scp->cmnd[6] << 24) | + ((u32) scp->cmnd[7] << 16) | + ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9]; + start_lba_lo = ((u32) scp->cmnd[2] << 24) | + ((u32) scp->cmnd[3] << 16) | + ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5]; + } + + /* + * 16-byte READ(0x88) or WRITE(0x8A) cdb + */ + else if (scp->cmd_len == 16) { + datalength = ((u32) scp->cmnd[10] << 24) | + ((u32) scp->cmnd[11] << 16) | + ((u32) scp->cmnd[12] << 8) | (u32) scp->cmnd[13]; + start_lba_lo = ((u32) scp->cmnd[6] << 24) | + ((u32) scp->cmnd[7] << 16) | + ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9]; + + start_lba_hi = ((u32) scp->cmnd[2] << 24) | + ((u32) scp->cmnd[3] << 16) | + ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5]; + } + + memset(&io_info, 0, sizeof(struct IO_REQUEST_INFO)); + io_info.ldStartBlock = ((u64)start_lba_hi << 32) | start_lba_lo; + io_info.numBlocks = datalength; + io_info.ldTgtId = device_id; + io_info.r1_alt_dev_handle = MR_DEVHANDLE_INVALID; + scsi_buff_len = scsi_bufflen(scp); + io_request->DataLength = cpu_to_le32(scsi_buff_len); + io_info.data_arms = 1; + + if (scp->sc_data_direction == DMA_FROM_DEVICE) + io_info.isRead = 1; + + local_map_ptr = fusion->ld_drv_map[(instance->map_id & 1)]; + ld = MR_TargetIdToLdGet(device_id, local_map_ptr); + + if (ld < instance->fw_supported_vd_count) + raid = MR_LdRaidGet(ld, local_map_ptr); + + if (!raid || (!fusion->fast_path_io)) { + rctx->reg_lock_flags = 0; + fp_possible = false; + } else { + if (MR_BuildRaidContext(instance, &io_info, rctx, + local_map_ptr, &raidLUN)) + fp_possible = (io_info.fpOkForIo > 0) ? true : false; + } + + megasas_get_msix_index(instance, scp, cmd, io_info.data_arms); + + if (instance->adapter_type >= VENTURA_SERIES) { + /* FP for Optimal raid level 1. + * All large RAID-1 writes (> 32 KiB, both WT and WB modes) + * are built by the driver as LD I/Os. + * All small RAID-1 WT writes (<= 32 KiB) are built as FP I/Os + * (there is never a reason to process these as buffered writes) + * All small RAID-1 WB writes (<= 32 KiB) are built as FP I/Os + * with the SLD bit asserted. + */ + if (io_info.r1_alt_dev_handle != MR_DEVHANDLE_INVALID) { + mrdev_priv = scp->device->hostdata; + + if (atomic_inc_return(&instance->fw_outstanding) > + (instance->host->can_queue)) { + fp_possible = false; + atomic_dec(&instance->fw_outstanding); + } else if (fusion->pcie_bw_limitation && + ((scsi_buff_len > MR_LARGE_IO_MIN_SIZE) || + (atomic_dec_if_positive(&mrdev_priv->r1_ldio_hint) > 0))) { + fp_possible = false; + atomic_dec(&instance->fw_outstanding); + if (scsi_buff_len > MR_LARGE_IO_MIN_SIZE) + atomic_set(&mrdev_priv->r1_ldio_hint, + instance->r1_ldio_hint_default); + } + } + + if (!fp_possible || + (io_info.isRead && io_info.ra_capable)) { + spin_lock_irqsave(&instance->stream_lock, + spinlock_flags); + megasas_stream_detect(instance, cmd, &io_info); + spin_unlock_irqrestore(&instance->stream_lock, + spinlock_flags); + /* In ventura if stream detected for a read and it is + * read ahead capable make this IO as LDIO + */ + if (is_stream_detected(rctx_g35)) + fp_possible = false; + } + + /* If raid is NULL, set CPU affinity to default CPU0 */ + if (raid) + megasas_set_raidflag_cpu_affinity(fusion, &io_request->RaidContext, + raid, fp_possible, io_info.isRead, + scsi_buff_len); + else + rctx_g35->routing_flags |= + (MR_RAID_CTX_CPUSEL_0 << MR_RAID_CTX_ROUTINGFLAGS_CPUSEL_SHIFT); + } + + if (fp_possible) { + megasas_set_pd_lba(io_request, scp->cmd_len, &io_info, scp, + local_map_ptr, start_lba_lo); + io_request->Function = MPI2_FUNCTION_SCSI_IO_REQUEST; + cmd->request_desc->SCSIIO.RequestFlags = + (MPI2_REQ_DESCRIPT_FLAGS_FP_IO + << MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT); + if (instance->adapter_type == INVADER_SERIES) { + rctx->type = MPI2_TYPE_CUDA; + rctx->nseg = 0x1; + io_request->IoFlags |= cpu_to_le16(MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH); + rctx->reg_lock_flags |= + (MR_RL_FLAGS_GRANT_DESTINATION_CUDA | + MR_RL_FLAGS_SEQ_NUM_ENABLE); + } else if (instance->adapter_type >= VENTURA_SERIES) { + rctx_g35->nseg_type |= (1 << RAID_CONTEXT_NSEG_SHIFT); + rctx_g35->nseg_type |= (MPI2_TYPE_CUDA << RAID_CONTEXT_TYPE_SHIFT); + rctx_g35->routing_flags |= (1 << MR_RAID_CTX_ROUTINGFLAGS_SQN_SHIFT); + io_request->IoFlags |= + cpu_to_le16(MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH); + } + if (fusion->load_balance_info && + (fusion->load_balance_info[device_id].loadBalanceFlag) && + (io_info.isRead)) { + io_info.devHandle = + get_updated_dev_handle(instance, + &fusion->load_balance_info[device_id], + &io_info, local_map_ptr); + scp->SCp.Status |= MEGASAS_LOAD_BALANCE_FLAG; + cmd->pd_r1_lb = io_info.pd_after_lb; + if (instance->adapter_type >= VENTURA_SERIES) + rctx_g35->span_arm = io_info.span_arm; + else + rctx->span_arm = io_info.span_arm; + + } else + scp->SCp.Status &= ~MEGASAS_LOAD_BALANCE_FLAG; + + if (instance->adapter_type >= VENTURA_SERIES) + cmd->r1_alt_dev_handle = io_info.r1_alt_dev_handle; + else + cmd->r1_alt_dev_handle = MR_DEVHANDLE_INVALID; + + if ((raidLUN[0] == 1) && + (local_map_ptr->raidMap.devHndlInfo[io_info.pd_after_lb].validHandles > 1)) { + instance->dev_handle = !(instance->dev_handle); + io_info.devHandle = + local_map_ptr->raidMap.devHndlInfo[io_info.pd_after_lb].devHandle[instance->dev_handle]; + } + + cmd->request_desc->SCSIIO.DevHandle = io_info.devHandle; + io_request->DevHandle = io_info.devHandle; + cmd->pd_interface = io_info.pd_interface; + /* populate the LUN field */ + memcpy(io_request->LUN, raidLUN, 8); + } else { + rctx->timeout_value = + cpu_to_le16(local_map_ptr->raidMap.fpPdIoTimeoutSec); + cmd->request_desc->SCSIIO.RequestFlags = + (MEGASAS_REQ_DESCRIPT_FLAGS_LD_IO + << MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT); + if (instance->adapter_type == INVADER_SERIES) { + if (io_info.do_fp_rlbypass || + (rctx->reg_lock_flags == REGION_TYPE_UNUSED)) + cmd->request_desc->SCSIIO.RequestFlags = + (MEGASAS_REQ_DESCRIPT_FLAGS_NO_LOCK << + MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT); + rctx->type = MPI2_TYPE_CUDA; + rctx->reg_lock_flags |= + (MR_RL_FLAGS_GRANT_DESTINATION_CPU0 | + MR_RL_FLAGS_SEQ_NUM_ENABLE); + rctx->nseg = 0x1; + } else if (instance->adapter_type >= VENTURA_SERIES) { + rctx_g35->routing_flags |= (1 << MR_RAID_CTX_ROUTINGFLAGS_SQN_SHIFT); + rctx_g35->nseg_type |= (1 << RAID_CONTEXT_NSEG_SHIFT); + rctx_g35->nseg_type |= (MPI2_TYPE_CUDA << RAID_CONTEXT_TYPE_SHIFT); + } + io_request->Function = MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST; + io_request->DevHandle = cpu_to_le16(device_id); + + } /* Not FP */ +} + +/** + * megasas_build_ld_nonrw_fusion - prepares non rw ios for virtual disk + * @instance: Adapter soft state + * @scmd: SCSI command + * @cmd: Command to be prepared + * + * Prepares the io_request frame for non-rw io cmds for vd. + */ +static void megasas_build_ld_nonrw_fusion(struct megasas_instance *instance, + struct scsi_cmnd *scmd, struct megasas_cmd_fusion *cmd) +{ + u32 device_id; + struct MPI2_RAID_SCSI_IO_REQUEST *io_request; + u16 ld; + struct MR_DRV_RAID_MAP_ALL *local_map_ptr; + struct fusion_context *fusion = instance->ctrl_context; + u8 span, physArm; + __le16 devHandle; + u32 arRef, pd; + struct MR_LD_RAID *raid; + struct RAID_CONTEXT *pRAID_Context; + u8 fp_possible = 1; + + io_request = cmd->io_request; + device_id = MEGASAS_DEV_INDEX(scmd); + local_map_ptr = fusion->ld_drv_map[(instance->map_id & 1)]; + io_request->DataLength = cpu_to_le32(scsi_bufflen(scmd)); + /* get RAID_Context pointer */ + pRAID_Context = &io_request->RaidContext.raid_context; + /* Check with FW team */ + pRAID_Context->virtual_disk_tgt_id = cpu_to_le16(device_id); + pRAID_Context->reg_lock_row_lba = 0; + pRAID_Context->reg_lock_length = 0; + + if (fusion->fast_path_io && ( + device_id < instance->fw_supported_vd_count)) { + + ld = MR_TargetIdToLdGet(device_id, local_map_ptr); + if (ld >= instance->fw_supported_vd_count - 1) + fp_possible = 0; + else { + raid = MR_LdRaidGet(ld, local_map_ptr); + if (!(raid->capability.fpNonRWCapable)) + fp_possible = 0; + } + } else + fp_possible = 0; + + if (!fp_possible) { + io_request->Function = MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST; + io_request->DevHandle = cpu_to_le16(device_id); + io_request->LUN[1] = scmd->device->lun; + pRAID_Context->timeout_value = + cpu_to_le16 (scmd->request->timeout / HZ); + cmd->request_desc->SCSIIO.RequestFlags = + (MPI2_REQ_DESCRIPT_FLAGS_SCSI_IO << + MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT); + } else { + + /* set RAID context values */ + pRAID_Context->config_seq_num = raid->seqNum; + if (instance->adapter_type < VENTURA_SERIES) + pRAID_Context->reg_lock_flags = REGION_TYPE_SHARED_READ; + pRAID_Context->timeout_value = + cpu_to_le16(raid->fpIoTimeoutForLd); + + /* get the DevHandle for the PD (since this is + fpNonRWCapable, this is a single disk RAID0) */ + span = physArm = 0; + arRef = MR_LdSpanArrayGet(ld, span, local_map_ptr); + pd = MR_ArPdGet(arRef, physArm, local_map_ptr); + devHandle = MR_PdDevHandleGet(pd, local_map_ptr); + + /* build request descriptor */ + cmd->request_desc->SCSIIO.RequestFlags = + (MPI2_REQ_DESCRIPT_FLAGS_FP_IO << + MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT); + cmd->request_desc->SCSIIO.DevHandle = devHandle; + + /* populate the LUN field */ + memcpy(io_request->LUN, raid->LUN, 8); + + /* build the raidScsiIO structure */ + io_request->Function = MPI2_FUNCTION_SCSI_IO_REQUEST; + io_request->DevHandle = devHandle; + } +} + +/** + * megasas_build_syspd_fusion - prepares rw/non-rw ios for syspd + * @instance: Adapter soft state + * @scmd: SCSI command + * @cmd: Command to be prepared + * @fp_possible: parameter to detect fast path or firmware path io. + * + * Prepares the io_request frame for rw/non-rw io cmds for syspds + */ +static void +megasas_build_syspd_fusion(struct megasas_instance *instance, + struct scsi_cmnd *scmd, struct megasas_cmd_fusion *cmd, + bool fp_possible) +{ + u32 device_id; + struct MPI2_RAID_SCSI_IO_REQUEST *io_request; + u16 pd_index = 0; + u16 os_timeout_value; + u16 timeout_limit; + struct MR_DRV_RAID_MAP_ALL *local_map_ptr; + struct RAID_CONTEXT *pRAID_Context; + struct MR_PD_CFG_SEQ_NUM_SYNC *pd_sync; + struct MR_PRIV_DEVICE *mr_device_priv_data; + struct fusion_context *fusion = instance->ctrl_context; + pd_sync = (void *)fusion->pd_seq_sync[(instance->pd_seq_map_id - 1) & 1]; + + device_id = MEGASAS_DEV_INDEX(scmd); + pd_index = MEGASAS_PD_INDEX(scmd); + os_timeout_value = scmd->request->timeout / HZ; + mr_device_priv_data = scmd->device->hostdata; + cmd->pd_interface = mr_device_priv_data->interface_type; + + io_request = cmd->io_request; + /* get RAID_Context pointer */ + pRAID_Context = &io_request->RaidContext.raid_context; + pRAID_Context->reg_lock_flags = 0; + pRAID_Context->reg_lock_row_lba = 0; + pRAID_Context->reg_lock_length = 0; + io_request->DataLength = cpu_to_le32(scsi_bufflen(scmd)); + io_request->LUN[1] = scmd->device->lun; + pRAID_Context->raid_flags = MR_RAID_FLAGS_IO_SUB_TYPE_SYSTEM_PD + << MR_RAID_CTX_RAID_FLAGS_IO_SUB_TYPE_SHIFT; + + /* If FW supports PD sequence number */ + if (instance->support_seqnum_jbod_fp) { + if (instance->use_seqnum_jbod_fp && + instance->pd_list[pd_index].driveType == TYPE_DISK) { + + /* More than 256 PD/JBOD support for Ventura */ + if (instance->support_morethan256jbod) + pRAID_Context->virtual_disk_tgt_id = + pd_sync->seq[pd_index].pd_target_id; + else + pRAID_Context->virtual_disk_tgt_id = + cpu_to_le16(device_id + + (MAX_PHYSICAL_DEVICES - 1)); + pRAID_Context->config_seq_num = + pd_sync->seq[pd_index].seqNum; + io_request->DevHandle = + pd_sync->seq[pd_index].devHandle; + if (instance->adapter_type >= VENTURA_SERIES) { + io_request->RaidContext.raid_context_g35.routing_flags |= + (1 << MR_RAID_CTX_ROUTINGFLAGS_SQN_SHIFT); + io_request->RaidContext.raid_context_g35.nseg_type |= + (1 << RAID_CONTEXT_NSEG_SHIFT); + io_request->RaidContext.raid_context_g35.nseg_type |= + (MPI2_TYPE_CUDA << RAID_CONTEXT_TYPE_SHIFT); + } else { + pRAID_Context->type = MPI2_TYPE_CUDA; + pRAID_Context->nseg = 0x1; + pRAID_Context->reg_lock_flags |= + (MR_RL_FLAGS_SEQ_NUM_ENABLE | + MR_RL_FLAGS_GRANT_DESTINATION_CUDA); + } + } else { + pRAID_Context->virtual_disk_tgt_id = + cpu_to_le16(device_id + + (MAX_PHYSICAL_DEVICES - 1)); + pRAID_Context->config_seq_num = 0; + io_request->DevHandle = cpu_to_le16(0xFFFF); + } + } else { + pRAID_Context->virtual_disk_tgt_id = cpu_to_le16(device_id); + pRAID_Context->config_seq_num = 0; + + if (fusion->fast_path_io) { + local_map_ptr = + fusion->ld_drv_map[(instance->map_id & 1)]; + io_request->DevHandle = + local_map_ptr->raidMap.devHndlInfo[device_id].curDevHdl; + } else { + io_request->DevHandle = cpu_to_le16(0xFFFF); + } + } + + cmd->request_desc->SCSIIO.DevHandle = io_request->DevHandle; + + megasas_get_msix_index(instance, scmd, cmd, 1); + + if (!fp_possible) { + /* system pd firmware path */ + io_request->Function = MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST; + cmd->request_desc->SCSIIO.RequestFlags = + (MPI2_REQ_DESCRIPT_FLAGS_SCSI_IO << + MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT); + pRAID_Context->timeout_value = cpu_to_le16(os_timeout_value); + pRAID_Context->virtual_disk_tgt_id = cpu_to_le16(device_id); + } else { + if (os_timeout_value) + os_timeout_value++; + + /* system pd Fast Path */ + io_request->Function = MPI2_FUNCTION_SCSI_IO_REQUEST; + timeout_limit = (scmd->device->type == TYPE_DISK) ? + 255 : 0xFFFF; + pRAID_Context->timeout_value = + cpu_to_le16((os_timeout_value > timeout_limit) ? + timeout_limit : os_timeout_value); + if (instance->adapter_type >= INVADER_SERIES) + io_request->IoFlags |= + cpu_to_le16(MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH); + + cmd->request_desc->SCSIIO.RequestFlags = + (MPI2_REQ_DESCRIPT_FLAGS_FP_IO << + MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT); + } +} + +/** + * megasas_build_io_fusion - Prepares IOs to devices + * @instance: Adapter soft state + * @scp: SCSI command + * @cmd: Command to be prepared + * + * Invokes helper functions to prepare request frames + * and sets flags appropriate for IO/Non-IO cmd + */ +static int +megasas_build_io_fusion(struct megasas_instance *instance, + struct scsi_cmnd *scp, + struct megasas_cmd_fusion *cmd) +{ + int sge_count; + u8 cmd_type; + struct MPI2_RAID_SCSI_IO_REQUEST *io_request = cmd->io_request; + struct MR_PRIV_DEVICE *mr_device_priv_data; + mr_device_priv_data = scp->device->hostdata; + + /* Zero out some fields so they don't get reused */ + memset(io_request->LUN, 0x0, 8); + io_request->CDB.EEDP32.PrimaryReferenceTag = 0; + io_request->CDB.EEDP32.PrimaryApplicationTagMask = 0; + io_request->EEDPFlags = 0; + io_request->Control = 0; + io_request->EEDPBlockSize = 0; + io_request->ChainOffset = 0; + io_request->RaidContext.raid_context.raid_flags = 0; + io_request->RaidContext.raid_context.type = 0; + io_request->RaidContext.raid_context.nseg = 0; + + memcpy(io_request->CDB.CDB32, scp->cmnd, scp->cmd_len); + /* + * Just the CDB length,rest of the Flags are zero + * This will be modified for FP in build_ldio_fusion + */ + io_request->IoFlags = cpu_to_le16(scp->cmd_len); + + switch (cmd_type = megasas_cmd_type(scp)) { + case READ_WRITE_LDIO: + megasas_build_ldio_fusion(instance, scp, cmd); + break; + case NON_READ_WRITE_LDIO: + megasas_build_ld_nonrw_fusion(instance, scp, cmd); + break; + case READ_WRITE_SYSPDIO: + megasas_build_syspd_fusion(instance, scp, cmd, true); + break; + case NON_READ_WRITE_SYSPDIO: + if (instance->secure_jbod_support || + mr_device_priv_data->is_tm_capable) + megasas_build_syspd_fusion(instance, scp, cmd, false); + else + megasas_build_syspd_fusion(instance, scp, cmd, true); + break; + default: + break; + } + + /* + * Construct SGL + */ + + sge_count = megasas_make_sgl(instance, scp, cmd); + + if (sge_count > instance->max_num_sge || (sge_count < 0)) { + dev_err(&instance->pdev->dev, + "%s %d sge_count (%d) is out of range. Range is: 0-%d\n", + __func__, __LINE__, sge_count, instance->max_num_sge); + return 1; + } + + if (instance->adapter_type >= VENTURA_SERIES) { + set_num_sge(&io_request->RaidContext.raid_context_g35, sge_count); + cpu_to_le16s(&io_request->RaidContext.raid_context_g35.routing_flags); + cpu_to_le16s(&io_request->RaidContext.raid_context_g35.nseg_type); + } else { + /* numSGE store lower 8 bit of sge_count. + * numSGEExt store higher 8 bit of sge_count + */ + io_request->RaidContext.raid_context.num_sge = sge_count; + io_request->RaidContext.raid_context.num_sge_ext = + (u8)(sge_count >> 8); + } + + io_request->SGLFlags = cpu_to_le16(MPI2_SGE_FLAGS_64_BIT_ADDRESSING); + + if (scp->sc_data_direction == DMA_TO_DEVICE) + io_request->Control |= cpu_to_le32(MPI2_SCSIIO_CONTROL_WRITE); + else if (scp->sc_data_direction == DMA_FROM_DEVICE) + io_request->Control |= cpu_to_le32(MPI2_SCSIIO_CONTROL_READ); + + io_request->SGLOffset0 = + offsetof(struct MPI2_RAID_SCSI_IO_REQUEST, SGL) / 4; + + io_request->SenseBufferLowAddress = + cpu_to_le32(lower_32_bits(cmd->sense_phys_addr)); + io_request->SenseBufferLength = SCSI_SENSE_BUFFERSIZE; + + cmd->scmd = scp; + scp->SCp.ptr = (char *)cmd; + + return 0; +} + +static union MEGASAS_REQUEST_DESCRIPTOR_UNION * +megasas_get_request_descriptor(struct megasas_instance *instance, u16 index) +{ + u8 *p; + struct fusion_context *fusion; + + fusion = instance->ctrl_context; + p = fusion->req_frames_desc + + sizeof(union MEGASAS_REQUEST_DESCRIPTOR_UNION) * index; + + return (union MEGASAS_REQUEST_DESCRIPTOR_UNION *)p; +} + + +/* megasas_prepate_secondRaid1_IO + * It prepares the raid 1 second IO + */ +static void megasas_prepare_secondRaid1_IO(struct megasas_instance *instance, + struct megasas_cmd_fusion *cmd, + struct megasas_cmd_fusion *r1_cmd) +{ + union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc, *req_desc2 = NULL; + struct fusion_context *fusion; + fusion = instance->ctrl_context; + req_desc = cmd->request_desc; + /* copy the io request frame as well as 8 SGEs data for r1 command*/ + memcpy(r1_cmd->io_request, cmd->io_request, + (sizeof(struct MPI2_RAID_SCSI_IO_REQUEST))); + memcpy(&r1_cmd->io_request->SGL, &cmd->io_request->SGL, + (fusion->max_sge_in_main_msg * sizeof(union MPI2_SGE_IO_UNION))); + /*sense buffer is different for r1 command*/ + r1_cmd->io_request->SenseBufferLowAddress = + cpu_to_le32(lower_32_bits(r1_cmd->sense_phys_addr)); + r1_cmd->scmd = cmd->scmd; + req_desc2 = megasas_get_request_descriptor(instance, + (r1_cmd->index - 1)); + req_desc2->Words = 0; + r1_cmd->request_desc = req_desc2; + req_desc2->SCSIIO.SMID = cpu_to_le16(r1_cmd->index); + req_desc2->SCSIIO.RequestFlags = req_desc->SCSIIO.RequestFlags; + r1_cmd->request_desc->SCSIIO.DevHandle = cmd->r1_alt_dev_handle; + r1_cmd->io_request->DevHandle = cmd->r1_alt_dev_handle; + r1_cmd->r1_alt_dev_handle = cmd->io_request->DevHandle; + cmd->io_request->RaidContext.raid_context_g35.flow_specific.peer_smid = + cpu_to_le16(r1_cmd->index); + r1_cmd->io_request->RaidContext.raid_context_g35.flow_specific.peer_smid = + cpu_to_le16(cmd->index); + /*MSIxIndex of both commands request descriptors should be same*/ + r1_cmd->request_desc->SCSIIO.MSIxIndex = + cmd->request_desc->SCSIIO.MSIxIndex; + /*span arm is different for r1 cmd*/ + r1_cmd->io_request->RaidContext.raid_context_g35.span_arm = + cmd->io_request->RaidContext.raid_context_g35.span_arm + 1; +} + +/** + * megasas_build_and_issue_cmd_fusion -Main routine for building and + * issuing non IOCTL cmd + * @instance: Adapter soft state + * @scmd: pointer to scsi cmd from OS + */ +static u32 +megasas_build_and_issue_cmd_fusion(struct megasas_instance *instance, + struct scsi_cmnd *scmd) +{ + struct megasas_cmd_fusion *cmd, *r1_cmd = NULL; + union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc; + u32 index; + + if ((megasas_cmd_type(scmd) == READ_WRITE_LDIO) && + instance->ldio_threshold && + (atomic_inc_return(&instance->ldio_outstanding) > + instance->ldio_threshold)) { + atomic_dec(&instance->ldio_outstanding); + return SCSI_MLQUEUE_DEVICE_BUSY; + } + + if (atomic_inc_return(&instance->fw_outstanding) > + instance->host->can_queue) { + atomic_dec(&instance->fw_outstanding); + return SCSI_MLQUEUE_HOST_BUSY; + } + + cmd = megasas_get_cmd_fusion(instance, scmd->request->tag); + + if (!cmd) { + atomic_dec(&instance->fw_outstanding); + return SCSI_MLQUEUE_HOST_BUSY; + } + + index = cmd->index; + + req_desc = megasas_get_request_descriptor(instance, index-1); + + req_desc->Words = 0; + cmd->request_desc = req_desc; + + if (megasas_build_io_fusion(instance, scmd, cmd)) { + megasas_return_cmd_fusion(instance, cmd); + dev_err(&instance->pdev->dev, "Error building command\n"); + cmd->request_desc = NULL; + atomic_dec(&instance->fw_outstanding); + return SCSI_MLQUEUE_HOST_BUSY; + } + + req_desc = cmd->request_desc; + req_desc->SCSIIO.SMID = cpu_to_le16(index); + + if (cmd->io_request->ChainOffset != 0 && + cmd->io_request->ChainOffset != 0xF) + dev_err(&instance->pdev->dev, "The chain offset value is not " + "correct : %x\n", cmd->io_request->ChainOffset); + /* + * if it is raid 1/10 fp write capable. + * try to get second command from pool and construct it. + * From FW, it has confirmed that lba values of two PDs + * corresponds to single R1/10 LD are always same + * + */ + /* driver side count always should be less than max_fw_cmds + * to get new command + */ + if (cmd->r1_alt_dev_handle != MR_DEVHANDLE_INVALID) { + r1_cmd = megasas_get_cmd_fusion(instance, + (scmd->request->tag + instance->max_fw_cmds)); + megasas_prepare_secondRaid1_IO(instance, cmd, r1_cmd); + } + + + /* + * Issue the command to the FW + */ + + megasas_fire_cmd_fusion(instance, req_desc); + + if (r1_cmd) + megasas_fire_cmd_fusion(instance, r1_cmd->request_desc); + + + return 0; +} + +/** + * megasas_complete_r1_command - + * completes R1 FP write commands which has valid peer smid + * @instance: Adapter soft state + * @cmd: MPT command frame + * + */ +static inline void +megasas_complete_r1_command(struct megasas_instance *instance, + struct megasas_cmd_fusion *cmd) +{ + u8 *sense, status, ex_status; + u32 data_length; + u16 peer_smid; + struct fusion_context *fusion; + struct megasas_cmd_fusion *r1_cmd = NULL; + struct scsi_cmnd *scmd_local = NULL; + struct RAID_CONTEXT_G35 *rctx_g35; + + rctx_g35 = &cmd->io_request->RaidContext.raid_context_g35; + fusion = instance->ctrl_context; + peer_smid = le16_to_cpu(rctx_g35->flow_specific.peer_smid); + + r1_cmd = fusion->cmd_list[peer_smid - 1]; + scmd_local = cmd->scmd; + status = rctx_g35->status; + ex_status = rctx_g35->ex_status; + data_length = cmd->io_request->DataLength; + sense = cmd->sense; + + cmd->cmd_completed = true; + + /* Check if peer command is completed or not*/ + if (r1_cmd->cmd_completed) { + rctx_g35 = &r1_cmd->io_request->RaidContext.raid_context_g35; + if (rctx_g35->status != MFI_STAT_OK) { + status = rctx_g35->status; + ex_status = rctx_g35->ex_status; + data_length = r1_cmd->io_request->DataLength; + sense = r1_cmd->sense; + } + + megasas_return_cmd_fusion(instance, r1_cmd); + map_cmd_status(fusion, scmd_local, status, ex_status, + le32_to_cpu(data_length), sense); + if (instance->ldio_threshold && + megasas_cmd_type(scmd_local) == READ_WRITE_LDIO) + atomic_dec(&instance->ldio_outstanding); + scmd_local->SCp.ptr = NULL; + megasas_return_cmd_fusion(instance, cmd); + scsi_dma_unmap(scmd_local); + scmd_local->scsi_done(scmd_local); + } +} + +/** + * complete_cmd_fusion - Completes command + * @instance: Adapter soft state + * @MSIxIndex: MSI number + * @irq_context: IRQ context + * + * Completes all commands that is in reply descriptor queue + */ +static int +complete_cmd_fusion(struct megasas_instance *instance, u32 MSIxIndex, + struct megasas_irq_context *irq_context) +{ + union MPI2_REPLY_DESCRIPTORS_UNION *desc; + struct MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR *reply_desc; + struct MPI2_RAID_SCSI_IO_REQUEST *scsi_io_req; + struct fusion_context *fusion; + struct megasas_cmd *cmd_mfi; + struct megasas_cmd_fusion *cmd_fusion; + u16 smid, num_completed; + u8 reply_descript_type, *sense, status, extStatus; + u32 device_id, data_length; + union desc_value d_val; + struct LD_LOAD_BALANCE_INFO *lbinfo; + int threshold_reply_count = 0; + struct scsi_cmnd *scmd_local = NULL; + struct MR_TASK_MANAGE_REQUEST *mr_tm_req; + struct MPI2_SCSI_TASK_MANAGE_REQUEST *mpi_tm_req; + + fusion = instance->ctrl_context; + + if (atomic_read(&instance->adprecovery) == MEGASAS_HW_CRITICAL_ERROR) + return IRQ_HANDLED; + + desc = fusion->reply_frames_desc[MSIxIndex] + + fusion->last_reply_idx[MSIxIndex]; + + reply_desc = (struct MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR *)desc; + + d_val.word = desc->Words; + + reply_descript_type = reply_desc->ReplyFlags & + MPI2_RPY_DESCRIPT_FLAGS_TYPE_MASK; + + if (reply_descript_type == MPI2_RPY_DESCRIPT_FLAGS_UNUSED) + return IRQ_NONE; + + num_completed = 0; + + while (d_val.u.low != cpu_to_le32(UINT_MAX) && + d_val.u.high != cpu_to_le32(UINT_MAX)) { + + smid = le16_to_cpu(reply_desc->SMID); + cmd_fusion = fusion->cmd_list[smid - 1]; + scsi_io_req = (struct MPI2_RAID_SCSI_IO_REQUEST *) + cmd_fusion->io_request; + + scmd_local = cmd_fusion->scmd; + status = scsi_io_req->RaidContext.raid_context.status; + extStatus = scsi_io_req->RaidContext.raid_context.ex_status; + sense = cmd_fusion->sense; + data_length = scsi_io_req->DataLength; + + switch (scsi_io_req->Function) { + case MPI2_FUNCTION_SCSI_TASK_MGMT: + mr_tm_req = (struct MR_TASK_MANAGE_REQUEST *) + cmd_fusion->io_request; + mpi_tm_req = (struct MPI2_SCSI_TASK_MANAGE_REQUEST *) + &mr_tm_req->TmRequest; + dev_dbg(&instance->pdev->dev, "TM completion:" + "type: 0x%x TaskMID: 0x%x\n", + mpi_tm_req->TaskType, mpi_tm_req->TaskMID); + complete(&cmd_fusion->done); + break; + case MPI2_FUNCTION_SCSI_IO_REQUEST: /*Fast Path IO.*/ + /* Update load balancing info */ + if (fusion->load_balance_info && + (cmd_fusion->scmd->SCp.Status & + MEGASAS_LOAD_BALANCE_FLAG)) { + device_id = MEGASAS_DEV_INDEX(scmd_local); + lbinfo = &fusion->load_balance_info[device_id]; + atomic_dec(&lbinfo->scsi_pending_cmds[cmd_fusion->pd_r1_lb]); + cmd_fusion->scmd->SCp.Status &= ~MEGASAS_LOAD_BALANCE_FLAG; + } + fallthrough; /* and complete IO */ + case MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST: /* LD-IO Path */ + atomic_dec(&instance->fw_outstanding); + if (cmd_fusion->r1_alt_dev_handle == MR_DEVHANDLE_INVALID) { + map_cmd_status(fusion, scmd_local, status, + extStatus, le32_to_cpu(data_length), + sense); + if (instance->ldio_threshold && + (megasas_cmd_type(scmd_local) == READ_WRITE_LDIO)) + atomic_dec(&instance->ldio_outstanding); + scmd_local->SCp.ptr = NULL; + megasas_return_cmd_fusion(instance, cmd_fusion); + scsi_dma_unmap(scmd_local); + scmd_local->scsi_done(scmd_local); + } else /* Optimal VD - R1 FP command completion. */ + megasas_complete_r1_command(instance, cmd_fusion); + break; + case MEGASAS_MPI2_FUNCTION_PASSTHRU_IO_REQUEST: /*MFI command */ + cmd_mfi = instance->cmd_list[cmd_fusion->sync_cmd_idx]; + /* Poll mode. Dummy free. + * In case of Interrupt mode, caller has reverse check. + */ + if (cmd_mfi->flags & DRV_DCMD_POLLED_MODE) { + cmd_mfi->flags &= ~DRV_DCMD_POLLED_MODE; + megasas_return_cmd(instance, cmd_mfi); + } else + megasas_complete_cmd(instance, cmd_mfi, DID_OK); + break; + } + + fusion->last_reply_idx[MSIxIndex]++; + if (fusion->last_reply_idx[MSIxIndex] >= + fusion->reply_q_depth) + fusion->last_reply_idx[MSIxIndex] = 0; + + desc->Words = cpu_to_le64(ULLONG_MAX); + num_completed++; + threshold_reply_count++; + + /* Get the next reply descriptor */ + if (!fusion->last_reply_idx[MSIxIndex]) + desc = fusion->reply_frames_desc[MSIxIndex]; + else + desc++; + + reply_desc = + (struct MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR *)desc; + + d_val.word = desc->Words; + + reply_descript_type = reply_desc->ReplyFlags & + MPI2_RPY_DESCRIPT_FLAGS_TYPE_MASK; + + if (reply_descript_type == MPI2_RPY_DESCRIPT_FLAGS_UNUSED) + break; + /* + * Write to reply post host index register after completing threshold + * number of reply counts and still there are more replies in reply queue + * pending to be completed + */ + if (threshold_reply_count >= instance->threshold_reply_count) { + if (instance->msix_combined) + writel(((MSIxIndex & 0x7) << 24) | + fusion->last_reply_idx[MSIxIndex], + instance->reply_post_host_index_addr[MSIxIndex/8]); + else + writel((MSIxIndex << 24) | + fusion->last_reply_idx[MSIxIndex], + instance->reply_post_host_index_addr[0]); + threshold_reply_count = 0; + if (irq_context) { + if (!irq_context->irq_poll_scheduled) { + irq_context->irq_poll_scheduled = true; + irq_context->irq_line_enable = true; + irq_poll_sched(&irq_context->irqpoll); + } + return num_completed; + } + } + } + + if (num_completed) { + wmb(); + if (instance->msix_combined) + writel(((MSIxIndex & 0x7) << 24) | + fusion->last_reply_idx[MSIxIndex], + instance->reply_post_host_index_addr[MSIxIndex/8]); + else + writel((MSIxIndex << 24) | + fusion->last_reply_idx[MSIxIndex], + instance->reply_post_host_index_addr[0]); + megasas_check_and_restore_queue_depth(instance); + } + return num_completed; +} + +/** + * megasas_enable_irq_poll() - enable irqpoll + * @instance: Adapter soft state + */ +static void megasas_enable_irq_poll(struct megasas_instance *instance) +{ + u32 count, i; + struct megasas_irq_context *irq_ctx; + + count = instance->msix_vectors > 0 ? instance->msix_vectors : 1; + + for (i = 0; i < count; i++) { + irq_ctx = &instance->irq_context[i]; + irq_poll_enable(&irq_ctx->irqpoll); + } +} + +/** + * megasas_sync_irqs - Synchronizes all IRQs owned by adapter + * @instance_addr: Adapter soft state address + */ +static void megasas_sync_irqs(unsigned long instance_addr) +{ + u32 count, i; + struct megasas_instance *instance = + (struct megasas_instance *)instance_addr; + struct megasas_irq_context *irq_ctx; + + count = instance->msix_vectors > 0 ? instance->msix_vectors : 1; + + for (i = 0; i < count; i++) { + synchronize_irq(pci_irq_vector(instance->pdev, i)); + irq_ctx = &instance->irq_context[i]; + irq_poll_disable(&irq_ctx->irqpoll); + if (irq_ctx->irq_poll_scheduled) { + irq_ctx->irq_poll_scheduled = false; + enable_irq(irq_ctx->os_irq); + complete_cmd_fusion(instance, irq_ctx->MSIxIndex, irq_ctx); + } + } +} + +/** + * megasas_irqpoll() - process a queue for completed reply descriptors + * @irqpoll: IRQ poll structure associated with queue to poll. + * @budget: Threshold of reply descriptors to process per poll. + * + * Return: The number of entries processed. + */ + +int megasas_irqpoll(struct irq_poll *irqpoll, int budget) +{ + struct megasas_irq_context *irq_ctx; + struct megasas_instance *instance; + int num_entries; + + irq_ctx = container_of(irqpoll, struct megasas_irq_context, irqpoll); + instance = irq_ctx->instance; + + if (irq_ctx->irq_line_enable) { + disable_irq_nosync(irq_ctx->os_irq); + irq_ctx->irq_line_enable = false; + } + + num_entries = complete_cmd_fusion(instance, irq_ctx->MSIxIndex, irq_ctx); + if (num_entries < budget) { + irq_poll_complete(irqpoll); + irq_ctx->irq_poll_scheduled = false; + enable_irq(irq_ctx->os_irq); + complete_cmd_fusion(instance, irq_ctx->MSIxIndex, irq_ctx); + } + + return num_entries; +} + +/** + * megasas_complete_cmd_dpc_fusion - Completes command + * @instance_addr: Adapter soft state address + * + * Tasklet to complete cmds + */ +static void +megasas_complete_cmd_dpc_fusion(unsigned long instance_addr) +{ + struct megasas_instance *instance = + (struct megasas_instance *)instance_addr; + struct megasas_irq_context *irq_ctx = NULL; + u32 count, MSIxIndex; + + count = instance->msix_vectors > 0 ? instance->msix_vectors : 1; + + /* If we have already declared adapter dead, donot complete cmds */ + if (atomic_read(&instance->adprecovery) == MEGASAS_HW_CRITICAL_ERROR) + return; + + for (MSIxIndex = 0 ; MSIxIndex < count; MSIxIndex++) { + irq_ctx = &instance->irq_context[MSIxIndex]; + complete_cmd_fusion(instance, MSIxIndex, irq_ctx); + } +} + +/** + * megasas_isr_fusion - isr entry point + * @irq: IRQ number + * @devp: IRQ context + */ +static irqreturn_t megasas_isr_fusion(int irq, void *devp) +{ + struct megasas_irq_context *irq_context = devp; + struct megasas_instance *instance = irq_context->instance; + u32 mfiStatus; + + if (instance->mask_interrupts) + return IRQ_NONE; + + if (irq_context->irq_poll_scheduled) + return IRQ_HANDLED; + + if (!instance->msix_vectors) { + mfiStatus = instance->instancet->clear_intr(instance); + if (!mfiStatus) + return IRQ_NONE; + } + + /* If we are resetting, bail */ + if (test_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags)) { + instance->instancet->clear_intr(instance); + return IRQ_HANDLED; + } + + return complete_cmd_fusion(instance, irq_context->MSIxIndex, irq_context) + ? IRQ_HANDLED : IRQ_NONE; +} + +/** + * build_mpt_mfi_pass_thru - builds a cmd fo MFI Pass thru + * @instance: Adapter soft state + * @mfi_cmd: megasas_cmd pointer + * + */ +static void +build_mpt_mfi_pass_thru(struct megasas_instance *instance, + struct megasas_cmd *mfi_cmd) +{ + struct MPI25_IEEE_SGE_CHAIN64 *mpi25_ieee_chain; + struct MPI2_RAID_SCSI_IO_REQUEST *io_req; + struct megasas_cmd_fusion *cmd; + struct fusion_context *fusion; + struct megasas_header *frame_hdr = &mfi_cmd->frame->hdr; + + fusion = instance->ctrl_context; + + cmd = megasas_get_cmd_fusion(instance, + instance->max_scsi_cmds + mfi_cmd->index); + + /* Save the smid. To be used for returning the cmd */ + mfi_cmd->context.smid = cmd->index; + + /* + * For cmds where the flag is set, store the flag and check + * on completion. For cmds with this flag, don't call + * megasas_complete_cmd + */ + + if (frame_hdr->flags & cpu_to_le16(MFI_FRAME_DONT_POST_IN_REPLY_QUEUE)) + mfi_cmd->flags |= DRV_DCMD_POLLED_MODE; + + io_req = cmd->io_request; + + if (instance->adapter_type >= INVADER_SERIES) { + struct MPI25_IEEE_SGE_CHAIN64 *sgl_ptr_end = + (struct MPI25_IEEE_SGE_CHAIN64 *)&io_req->SGL; + sgl_ptr_end += fusion->max_sge_in_main_msg - 1; + sgl_ptr_end->Flags = 0; + } + + mpi25_ieee_chain = + (struct MPI25_IEEE_SGE_CHAIN64 *)&io_req->SGL.IeeeChain; + + io_req->Function = MEGASAS_MPI2_FUNCTION_PASSTHRU_IO_REQUEST; + io_req->SGLOffset0 = offsetof(struct MPI2_RAID_SCSI_IO_REQUEST, + SGL) / 4; + io_req->ChainOffset = fusion->chain_offset_mfi_pthru; + + mpi25_ieee_chain->Address = cpu_to_le64(mfi_cmd->frame_phys_addr); + + mpi25_ieee_chain->Flags = IEEE_SGE_FLAGS_CHAIN_ELEMENT | + MPI2_IEEE_SGE_FLAGS_IOCPLBNTA_ADDR; + + mpi25_ieee_chain->Length = cpu_to_le32(instance->mfi_frame_size); +} + +/** + * build_mpt_cmd - Calls helper function to build a cmd MFI Pass thru cmd + * @instance: Adapter soft state + * @cmd: mfi cmd to build + * + */ +static union MEGASAS_REQUEST_DESCRIPTOR_UNION * +build_mpt_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd) +{ + union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc = NULL; + u16 index; + + build_mpt_mfi_pass_thru(instance, cmd); + index = cmd->context.smid; + + req_desc = megasas_get_request_descriptor(instance, index - 1); + + req_desc->Words = 0; + req_desc->SCSIIO.RequestFlags = (MPI2_REQ_DESCRIPT_FLAGS_SCSI_IO << + MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT); + + req_desc->SCSIIO.SMID = cpu_to_le16(index); + + return req_desc; +} + +/** + * megasas_issue_dcmd_fusion - Issues a MFI Pass thru cmd + * @instance: Adapter soft state + * @cmd: mfi cmd pointer + * + */ +static void +megasas_issue_dcmd_fusion(struct megasas_instance *instance, + struct megasas_cmd *cmd) +{ + union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc; + + req_desc = build_mpt_cmd(instance, cmd); + + megasas_fire_cmd_fusion(instance, req_desc); + return; +} + +/** + * megasas_release_fusion - Reverses the FW initialization + * @instance: Adapter soft state + */ +void +megasas_release_fusion(struct megasas_instance *instance) +{ + megasas_free_ioc_init_cmd(instance); + megasas_free_cmds(instance); + megasas_free_cmds_fusion(instance); + + iounmap(instance->reg_set); + + pci_release_selected_regions(instance->pdev, 1<<instance->bar); +} + +/** + * megasas_read_fw_status_reg_fusion - returns the current FW status value + * @instance: Adapter soft state + */ +static u32 +megasas_read_fw_status_reg_fusion(struct megasas_instance *instance) +{ + return megasas_readl(instance, &instance->reg_set->outbound_scratch_pad_0); +} + +/** + * megasas_alloc_host_crash_buffer - Host buffers for Crash dump collection from Firmware + * @instance: Controller's soft instance + * @return: Number of allocated host crash buffers + */ +static void +megasas_alloc_host_crash_buffer(struct megasas_instance *instance) +{ + unsigned int i; + + for (i = 0; i < MAX_CRASH_DUMP_SIZE; i++) { + instance->crash_buf[i] = vzalloc(CRASH_DMA_BUF_SIZE); + if (!instance->crash_buf[i]) { + dev_info(&instance->pdev->dev, "Firmware crash dump " + "memory allocation failed at index %d\n", i); + break; + } + } + instance->drv_buf_alloc = i; +} + +/** + * megasas_free_host_crash_buffer - Host buffers for Crash dump collection from Firmware + * @instance: Controller's soft instance + */ +void +megasas_free_host_crash_buffer(struct megasas_instance *instance) +{ + unsigned int i; + for (i = 0; i < instance->drv_buf_alloc; i++) { + if (instance->crash_buf[i]) + vfree(instance->crash_buf[i]); + } + instance->drv_buf_index = 0; + instance->drv_buf_alloc = 0; + instance->fw_crash_state = UNAVAILABLE; + instance->fw_crash_buffer_size = 0; +} + +/** + * megasas_adp_reset_fusion - For controller reset + * @instance: Controller's soft instance + * @regs: MFI register set + */ +static int +megasas_adp_reset_fusion(struct megasas_instance *instance, + struct megasas_register_set __iomem *regs) +{ + u32 host_diag, abs_state, retry; + + /* Now try to reset the chip */ + writel(MPI2_WRSEQ_FLUSH_KEY_VALUE, &instance->reg_set->fusion_seq_offset); + writel(MPI2_WRSEQ_1ST_KEY_VALUE, &instance->reg_set->fusion_seq_offset); + writel(MPI2_WRSEQ_2ND_KEY_VALUE, &instance->reg_set->fusion_seq_offset); + writel(MPI2_WRSEQ_3RD_KEY_VALUE, &instance->reg_set->fusion_seq_offset); + writel(MPI2_WRSEQ_4TH_KEY_VALUE, &instance->reg_set->fusion_seq_offset); + writel(MPI2_WRSEQ_5TH_KEY_VALUE, &instance->reg_set->fusion_seq_offset); + writel(MPI2_WRSEQ_6TH_KEY_VALUE, &instance->reg_set->fusion_seq_offset); + + /* Check that the diag write enable (DRWE) bit is on */ + host_diag = megasas_readl(instance, &instance->reg_set->fusion_host_diag); + retry = 0; + while (!(host_diag & HOST_DIAG_WRITE_ENABLE)) { + msleep(100); + host_diag = megasas_readl(instance, + &instance->reg_set->fusion_host_diag); + if (retry++ == 100) { + dev_warn(&instance->pdev->dev, + "Host diag unlock failed from %s %d\n", + __func__, __LINE__); + break; + } + } + if (!(host_diag & HOST_DIAG_WRITE_ENABLE)) + return -1; + + /* Send chip reset command */ + writel(host_diag | HOST_DIAG_RESET_ADAPTER, + &instance->reg_set->fusion_host_diag); + msleep(3000); + + /* Make sure reset adapter bit is cleared */ + host_diag = megasas_readl(instance, &instance->reg_set->fusion_host_diag); + retry = 0; + while (host_diag & HOST_DIAG_RESET_ADAPTER) { + msleep(100); + host_diag = megasas_readl(instance, + &instance->reg_set->fusion_host_diag); + if (retry++ == 1000) { + dev_warn(&instance->pdev->dev, + "Diag reset adapter never cleared %s %d\n", + __func__, __LINE__); + break; + } + } + if (host_diag & HOST_DIAG_RESET_ADAPTER) + return -1; + + abs_state = instance->instancet->read_fw_status_reg(instance) + & MFI_STATE_MASK; + retry = 0; + + while ((abs_state <= MFI_STATE_FW_INIT) && (retry++ < 1000)) { + msleep(100); + abs_state = instance->instancet-> + read_fw_status_reg(instance) & MFI_STATE_MASK; + } + if (abs_state <= MFI_STATE_FW_INIT) { + dev_warn(&instance->pdev->dev, + "fw state < MFI_STATE_FW_INIT, state = 0x%x %s %d\n", + abs_state, __func__, __LINE__); + return -1; + } + + return 0; +} + +/** + * megasas_check_reset_fusion - For controller reset check + * @instance: Controller's soft instance + * @regs: MFI register set + */ +static int +megasas_check_reset_fusion(struct megasas_instance *instance, + struct megasas_register_set __iomem *regs) +{ + return 0; +} + +/** + * megasas_trigger_snap_dump - Trigger snap dump in FW + * @instance: Soft instance of adapter + */ +static inline void megasas_trigger_snap_dump(struct megasas_instance *instance) +{ + int j; + u32 fw_state, abs_state; + + if (!instance->disableOnlineCtrlReset) { + dev_info(&instance->pdev->dev, "Trigger snap dump\n"); + writel(MFI_ADP_TRIGGER_SNAP_DUMP, + &instance->reg_set->doorbell); + readl(&instance->reg_set->doorbell); + } + + for (j = 0; j < instance->snapdump_wait_time; j++) { + abs_state = instance->instancet->read_fw_status_reg(instance); + fw_state = abs_state & MFI_STATE_MASK; + if (fw_state == MFI_STATE_FAULT) { + dev_printk(KERN_ERR, &instance->pdev->dev, + "FW in FAULT state Fault code:0x%x subcode:0x%x func:%s\n", + abs_state & MFI_STATE_FAULT_CODE, + abs_state & MFI_STATE_FAULT_SUBCODE, __func__); + return; + } + msleep(1000); + } +} + +/* This function waits for outstanding commands on fusion to complete */ +static int +megasas_wait_for_outstanding_fusion(struct megasas_instance *instance, + int reason, int *convert) +{ + int i, outstanding, retval = 0, hb_seconds_missed = 0; + u32 fw_state, abs_state; + u32 waittime_for_io_completion; + + waittime_for_io_completion = + min_t(u32, resetwaittime, + (resetwaittime - instance->snapdump_wait_time)); + + if (reason == MFI_IO_TIMEOUT_OCR) { + dev_info(&instance->pdev->dev, + "MFI command is timed out\n"); + megasas_complete_cmd_dpc_fusion((unsigned long)instance); + if (instance->snapdump_wait_time) + megasas_trigger_snap_dump(instance); + retval = 1; + goto out; + } + + for (i = 0; i < waittime_for_io_completion; i++) { + /* Check if firmware is in fault state */ + abs_state = instance->instancet->read_fw_status_reg(instance); + fw_state = abs_state & MFI_STATE_MASK; + if (fw_state == MFI_STATE_FAULT) { + dev_printk(KERN_ERR, &instance->pdev->dev, + "FW in FAULT state Fault code:0x%x subcode:0x%x func:%s\n", + abs_state & MFI_STATE_FAULT_CODE, + abs_state & MFI_STATE_FAULT_SUBCODE, __func__); + megasas_complete_cmd_dpc_fusion((unsigned long)instance); + if (instance->requestorId && reason) { + dev_warn(&instance->pdev->dev, "SR-IOV Found FW in FAULT" + " state while polling during" + " I/O timeout handling for %d\n", + instance->host->host_no); + *convert = 1; + } + + retval = 1; + goto out; + } + + + /* If SR-IOV VF mode & heartbeat timeout, don't wait */ + if (instance->requestorId && !reason) { + retval = 1; + goto out; + } + + /* If SR-IOV VF mode & I/O timeout, check for HB timeout */ + if (instance->requestorId && (reason == SCSIIO_TIMEOUT_OCR)) { + if (instance->hb_host_mem->HB.fwCounter != + instance->hb_host_mem->HB.driverCounter) { + instance->hb_host_mem->HB.driverCounter = + instance->hb_host_mem->HB.fwCounter; + hb_seconds_missed = 0; + } else { + hb_seconds_missed++; + if (hb_seconds_missed == + (MEGASAS_SRIOV_HEARTBEAT_INTERVAL_VF/HZ)) { + dev_warn(&instance->pdev->dev, "SR-IOV:" + " Heartbeat never completed " + " while polling during I/O " + " timeout handling for " + "scsi%d.\n", + instance->host->host_no); + *convert = 1; + retval = 1; + goto out; + } + } + } + + megasas_complete_cmd_dpc_fusion((unsigned long)instance); + outstanding = atomic_read(&instance->fw_outstanding); + if (!outstanding) + goto out; + + if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) { + dev_notice(&instance->pdev->dev, "[%2d]waiting for %d " + "commands to complete for scsi%d\n", i, + outstanding, instance->host->host_no); + } + msleep(1000); + } + + if (instance->snapdump_wait_time) { + megasas_trigger_snap_dump(instance); + retval = 1; + goto out; + } + + if (atomic_read(&instance->fw_outstanding)) { + dev_err(&instance->pdev->dev, "pending commands remain after waiting, " + "will reset adapter scsi%d.\n", + instance->host->host_no); + *convert = 1; + retval = 1; + } + +out: + return retval; +} + +void megasas_reset_reply_desc(struct megasas_instance *instance) +{ + int i, j, count; + struct fusion_context *fusion; + union MPI2_REPLY_DESCRIPTORS_UNION *reply_desc; + + fusion = instance->ctrl_context; + count = instance->msix_vectors > 0 ? instance->msix_vectors : 1; + for (i = 0 ; i < count ; i++) { + fusion->last_reply_idx[i] = 0; + reply_desc = fusion->reply_frames_desc[i]; + for (j = 0 ; j < fusion->reply_q_depth; j++, reply_desc++) + reply_desc->Words = cpu_to_le64(ULLONG_MAX); + } +} + +/* + * megasas_refire_mgmt_cmd : Re-fire management commands + * @instance: Controller's soft instance +*/ +static void megasas_refire_mgmt_cmd(struct megasas_instance *instance, + bool return_ioctl) +{ + int j; + struct megasas_cmd_fusion *cmd_fusion; + struct fusion_context *fusion; + struct megasas_cmd *cmd_mfi; + union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc; + struct MPI2_RAID_SCSI_IO_REQUEST *scsi_io_req; + u16 smid; + bool refire_cmd = false; + u8 result; + u32 opcode = 0; + + fusion = instance->ctrl_context; + + /* Re-fire management commands. + * Do not traverse complet MPT frame pool. Start from max_scsi_cmds. + */ + for (j = instance->max_scsi_cmds ; j < instance->max_fw_cmds; j++) { + cmd_fusion = fusion->cmd_list[j]; + cmd_mfi = instance->cmd_list[cmd_fusion->sync_cmd_idx]; + smid = le16_to_cpu(cmd_mfi->context.smid); + result = REFIRE_CMD; + + if (!smid) + continue; + + req_desc = megasas_get_request_descriptor(instance, smid - 1); + + switch (cmd_mfi->frame->hdr.cmd) { + case MFI_CMD_DCMD: + opcode = le32_to_cpu(cmd_mfi->frame->dcmd.opcode); + /* Do not refire shutdown command */ + if (opcode == MR_DCMD_CTRL_SHUTDOWN) { + cmd_mfi->frame->dcmd.cmd_status = MFI_STAT_OK; + result = COMPLETE_CMD; + break; + } + + refire_cmd = ((opcode != MR_DCMD_LD_MAP_GET_INFO)) && + (opcode != MR_DCMD_SYSTEM_PD_MAP_GET_INFO) && + !(cmd_mfi->flags & DRV_DCMD_SKIP_REFIRE); + + if (!refire_cmd) + result = RETURN_CMD; + + break; + case MFI_CMD_NVME: + if (!instance->support_nvme_passthru) { + cmd_mfi->frame->hdr.cmd_status = MFI_STAT_INVALID_CMD; + result = COMPLETE_CMD; + } + + break; + case MFI_CMD_TOOLBOX: + if (!instance->support_pci_lane_margining) { + cmd_mfi->frame->hdr.cmd_status = MFI_STAT_INVALID_CMD; + result = COMPLETE_CMD; + } + + break; + default: + break; + } + + if (return_ioctl && cmd_mfi->sync_cmd && + cmd_mfi->frame->hdr.cmd != MFI_CMD_ABORT) { + dev_err(&instance->pdev->dev, + "return -EBUSY from %s %d cmd 0x%x opcode 0x%x\n", + __func__, __LINE__, cmd_mfi->frame->hdr.cmd, + le32_to_cpu(cmd_mfi->frame->dcmd.opcode)); + cmd_mfi->cmd_status_drv = DCMD_BUSY; + result = COMPLETE_CMD; + } + + scsi_io_req = (struct MPI2_RAID_SCSI_IO_REQUEST *) + cmd_fusion->io_request; + if (scsi_io_req->Function == MPI2_FUNCTION_SCSI_TASK_MGMT) + result = RETURN_CMD; + + switch (result) { + case REFIRE_CMD: + megasas_fire_cmd_fusion(instance, req_desc); + break; + case RETURN_CMD: + megasas_return_cmd(instance, cmd_mfi); + break; + case COMPLETE_CMD: + megasas_complete_cmd(instance, cmd_mfi, DID_OK); + break; + } + } +} + +/* + * megasas_return_polled_cmds: Return polled mode commands back to the pool + * before initiating an OCR. + * @instance: Controller's soft instance + */ +static void +megasas_return_polled_cmds(struct megasas_instance *instance) +{ + int i; + struct megasas_cmd_fusion *cmd_fusion; + struct fusion_context *fusion; + struct megasas_cmd *cmd_mfi; + + fusion = instance->ctrl_context; + + for (i = instance->max_scsi_cmds; i < instance->max_fw_cmds; i++) { + cmd_fusion = fusion->cmd_list[i]; + cmd_mfi = instance->cmd_list[cmd_fusion->sync_cmd_idx]; + + if (cmd_mfi->flags & DRV_DCMD_POLLED_MODE) { + if (megasas_dbg_lvl & OCR_DEBUG) + dev_info(&instance->pdev->dev, + "%s %d return cmd 0x%x opcode 0x%x\n", + __func__, __LINE__, cmd_mfi->frame->hdr.cmd, + le32_to_cpu(cmd_mfi->frame->dcmd.opcode)); + cmd_mfi->flags &= ~DRV_DCMD_POLLED_MODE; + megasas_return_cmd(instance, cmd_mfi); + } + } +} + +/* + * megasas_track_scsiio : Track SCSI IOs outstanding to a SCSI device + * @instance: per adapter struct + * @channel: the channel assigned by the OS + * @id: the id assigned by the OS + * + * Returns SUCCESS if no IOs pending to SCSI device, else return FAILED + */ + +static int megasas_track_scsiio(struct megasas_instance *instance, + int id, int channel) +{ + int i, found = 0; + struct megasas_cmd_fusion *cmd_fusion; + struct fusion_context *fusion; + fusion = instance->ctrl_context; + + for (i = 0 ; i < instance->max_scsi_cmds; i++) { + cmd_fusion = fusion->cmd_list[i]; + if (cmd_fusion->scmd && + (cmd_fusion->scmd->device->id == id && + cmd_fusion->scmd->device->channel == channel)) { + dev_info(&instance->pdev->dev, + "SCSI commands pending to target" + "channel %d id %d \tSMID: 0x%x\n", + channel, id, cmd_fusion->index); + scsi_print_command(cmd_fusion->scmd); + found = 1; + break; + } + } + + return found ? FAILED : SUCCESS; +} + +/** + * megasas_tm_response_code - translation of device response code + * @instance: Controller's soft instance + * @mpi_reply: MPI reply returned by firmware + * + * Return nothing. + */ +static void +megasas_tm_response_code(struct megasas_instance *instance, + struct MPI2_SCSI_TASK_MANAGE_REPLY *mpi_reply) +{ + char *desc; + + switch (mpi_reply->ResponseCode) { + case MPI2_SCSITASKMGMT_RSP_TM_COMPLETE: + desc = "task management request completed"; + break; + case MPI2_SCSITASKMGMT_RSP_INVALID_FRAME: + desc = "invalid frame"; + break; + case MPI2_SCSITASKMGMT_RSP_TM_NOT_SUPPORTED: + desc = "task management request not supported"; + break; + case MPI2_SCSITASKMGMT_RSP_TM_FAILED: + desc = "task management request failed"; + break; + case MPI2_SCSITASKMGMT_RSP_TM_SUCCEEDED: + desc = "task management request succeeded"; + break; + case MPI2_SCSITASKMGMT_RSP_TM_INVALID_LUN: + desc = "invalid lun"; + break; + case 0xA: + desc = "overlapped tag attempted"; + break; + case MPI2_SCSITASKMGMT_RSP_IO_QUEUED_ON_IOC: + desc = "task queued, however not sent to target"; + break; + default: + desc = "unknown"; + break; + } + dev_dbg(&instance->pdev->dev, "response_code(%01x): %s\n", + mpi_reply->ResponseCode, desc); + dev_dbg(&instance->pdev->dev, + "TerminationCount/DevHandle/Function/TaskType/IOCStat/IOCLoginfo" + " 0x%x/0x%x/0x%x/0x%x/0x%x/0x%x\n", + mpi_reply->TerminationCount, mpi_reply->DevHandle, + mpi_reply->Function, mpi_reply->TaskType, + mpi_reply->IOCStatus, mpi_reply->IOCLogInfo); +} + +/** + * megasas_issue_tm - main routine for sending tm requests + * @instance: per adapter struct + * @device_handle: device handle + * @channel: the channel assigned by the OS + * @id: the id assigned by the OS + * @smid_task: smid assigned to the task + * @type: MPI2_SCSITASKMGMT_TASKTYPE__XXX (defined in megaraid_sas_fusion.c) + * @mr_device_priv_data: private data + * Context: user + * + * MegaRaid use MPT interface for Task Magement request. + * A generic API for sending task management requests to firmware. + * + * Return SUCCESS or FAILED. + */ +static int +megasas_issue_tm(struct megasas_instance *instance, u16 device_handle, + uint channel, uint id, u16 smid_task, u8 type, + struct MR_PRIV_DEVICE *mr_device_priv_data) +{ + struct MR_TASK_MANAGE_REQUEST *mr_request; + struct MPI2_SCSI_TASK_MANAGE_REQUEST *mpi_request; + unsigned long timeleft; + struct megasas_cmd_fusion *cmd_fusion; + struct megasas_cmd *cmd_mfi; + union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc; + struct fusion_context *fusion = NULL; + struct megasas_cmd_fusion *scsi_lookup; + int rc; + int timeout = MEGASAS_DEFAULT_TM_TIMEOUT; + struct MPI2_SCSI_TASK_MANAGE_REPLY *mpi_reply; + + fusion = instance->ctrl_context; + + cmd_mfi = megasas_get_cmd(instance); + + if (!cmd_mfi) { + dev_err(&instance->pdev->dev, "Failed from %s %d\n", + __func__, __LINE__); + return -ENOMEM; + } + + cmd_fusion = megasas_get_cmd_fusion(instance, + instance->max_scsi_cmds + cmd_mfi->index); + + /* Save the smid. To be used for returning the cmd */ + cmd_mfi->context.smid = cmd_fusion->index; + + req_desc = megasas_get_request_descriptor(instance, + (cmd_fusion->index - 1)); + + cmd_fusion->request_desc = req_desc; + req_desc->Words = 0; + + mr_request = (struct MR_TASK_MANAGE_REQUEST *) cmd_fusion->io_request; + memset(mr_request, 0, sizeof(struct MR_TASK_MANAGE_REQUEST)); + mpi_request = (struct MPI2_SCSI_TASK_MANAGE_REQUEST *) &mr_request->TmRequest; + mpi_request->Function = MPI2_FUNCTION_SCSI_TASK_MGMT; + mpi_request->DevHandle = cpu_to_le16(device_handle); + mpi_request->TaskType = type; + mpi_request->TaskMID = cpu_to_le16(smid_task); + mpi_request->LUN[1] = 0; + + + req_desc = cmd_fusion->request_desc; + req_desc->HighPriority.SMID = cpu_to_le16(cmd_fusion->index); + req_desc->HighPriority.RequestFlags = + (MPI2_REQ_DESCRIPT_FLAGS_HIGH_PRIORITY << + MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT); + req_desc->HighPriority.MSIxIndex = 0; + req_desc->HighPriority.LMID = 0; + req_desc->HighPriority.Reserved1 = 0; + + if (channel < MEGASAS_MAX_PD_CHANNELS) + mr_request->tmReqFlags.isTMForPD = 1; + else + mr_request->tmReqFlags.isTMForLD = 1; + + init_completion(&cmd_fusion->done); + megasas_fire_cmd_fusion(instance, req_desc); + + switch (type) { + case MPI2_SCSITASKMGMT_TASKTYPE_ABORT_TASK: + timeout = mr_device_priv_data->task_abort_tmo; + break; + case MPI2_SCSITASKMGMT_TASKTYPE_TARGET_RESET: + timeout = mr_device_priv_data->target_reset_tmo; + break; + } + + timeleft = wait_for_completion_timeout(&cmd_fusion->done, timeout * HZ); + + if (!timeleft) { + dev_err(&instance->pdev->dev, + "task mgmt type 0x%x timed out\n", type); + mutex_unlock(&instance->reset_mutex); + rc = megasas_reset_fusion(instance->host, MFI_IO_TIMEOUT_OCR); + mutex_lock(&instance->reset_mutex); + return rc; + } + + mpi_reply = (struct MPI2_SCSI_TASK_MANAGE_REPLY *) &mr_request->TMReply; + megasas_tm_response_code(instance, mpi_reply); + + megasas_return_cmd(instance, cmd_mfi); + rc = SUCCESS; + switch (type) { + case MPI2_SCSITASKMGMT_TASKTYPE_ABORT_TASK: + scsi_lookup = fusion->cmd_list[smid_task - 1]; + + if (scsi_lookup->scmd == NULL) + break; + else { + instance->instancet->disable_intr(instance); + megasas_sync_irqs((unsigned long)instance); + instance->instancet->enable_intr(instance); + megasas_enable_irq_poll(instance); + if (scsi_lookup->scmd == NULL) + break; + } + rc = FAILED; + break; + + case MPI2_SCSITASKMGMT_TASKTYPE_TARGET_RESET: + if ((channel == 0xFFFFFFFF) && (id == 0xFFFFFFFF)) + break; + instance->instancet->disable_intr(instance); + megasas_sync_irqs((unsigned long)instance); + rc = megasas_track_scsiio(instance, id, channel); + instance->instancet->enable_intr(instance); + megasas_enable_irq_poll(instance); + + break; + case MPI2_SCSITASKMGMT_TASKTYPE_ABRT_TASK_SET: + case MPI2_SCSITASKMGMT_TASKTYPE_QUERY_TASK: + break; + default: + rc = FAILED; + break; + } + + return rc; + +} + +/* + * megasas_fusion_smid_lookup : Look for fusion command correpspodning to SCSI + * @instance: per adapter struct + * + * Return Non Zero index, if SMID found in outstanding commands + */ +static u16 megasas_fusion_smid_lookup(struct scsi_cmnd *scmd) +{ + int i, ret = 0; + struct megasas_instance *instance; + struct megasas_cmd_fusion *cmd_fusion; + struct fusion_context *fusion; + + instance = (struct megasas_instance *)scmd->device->host->hostdata; + + fusion = instance->ctrl_context; + + for (i = 0; i < instance->max_scsi_cmds; i++) { + cmd_fusion = fusion->cmd_list[i]; + if (cmd_fusion->scmd && (cmd_fusion->scmd == scmd)) { + scmd_printk(KERN_NOTICE, scmd, "Abort request is for" + " SMID: %d\n", cmd_fusion->index); + ret = cmd_fusion->index; + break; + } + } + + return ret; +} + +/* +* megasas_get_tm_devhandle - Get devhandle for TM request +* @sdev- OS provided scsi device +* +* Returns- devhandle/targetID of SCSI device +*/ +static u16 megasas_get_tm_devhandle(struct scsi_device *sdev) +{ + u16 pd_index = 0; + u32 device_id; + struct megasas_instance *instance; + struct fusion_context *fusion; + struct MR_PD_CFG_SEQ_NUM_SYNC *pd_sync; + u16 devhandle = (u16)ULONG_MAX; + + instance = (struct megasas_instance *)sdev->host->hostdata; + fusion = instance->ctrl_context; + + if (!MEGASAS_IS_LOGICAL(sdev)) { + if (instance->use_seqnum_jbod_fp) { + pd_index = (sdev->channel * MEGASAS_MAX_DEV_PER_CHANNEL) + + sdev->id; + pd_sync = (void *)fusion->pd_seq_sync + [(instance->pd_seq_map_id - 1) & 1]; + devhandle = pd_sync->seq[pd_index].devHandle; + } else + sdev_printk(KERN_ERR, sdev, "Firmware expose tmCapable" + " without JBOD MAP support from %s %d\n", __func__, __LINE__); + } else { + device_id = ((sdev->channel % 2) * MEGASAS_MAX_DEV_PER_CHANNEL) + + sdev->id; + devhandle = device_id; + } + + return devhandle; +} + +/* + * megasas_task_abort_fusion : SCSI task abort function for fusion adapters + * @scmd : pointer to scsi command object + * + * Return SUCCESS, if command aborted else FAILED + */ + +int megasas_task_abort_fusion(struct scsi_cmnd *scmd) +{ + struct megasas_instance *instance; + u16 smid, devhandle; + int ret; + struct MR_PRIV_DEVICE *mr_device_priv_data; + mr_device_priv_data = scmd->device->hostdata; + + instance = (struct megasas_instance *)scmd->device->host->hostdata; + + if (atomic_read(&instance->adprecovery) != MEGASAS_HBA_OPERATIONAL) { + dev_err(&instance->pdev->dev, "Controller is not OPERATIONAL," + "SCSI host:%d\n", instance->host->host_no); + ret = FAILED; + return ret; + } + + if (!mr_device_priv_data) { + sdev_printk(KERN_INFO, scmd->device, "device been deleted! " + "scmd(%p)\n", scmd); + scmd->result = DID_NO_CONNECT << 16; + ret = SUCCESS; + goto out; + } + + if (!mr_device_priv_data->is_tm_capable) { + ret = FAILED; + goto out; + } + + mutex_lock(&instance->reset_mutex); + + smid = megasas_fusion_smid_lookup(scmd); + + if (!smid) { + ret = SUCCESS; + scmd_printk(KERN_NOTICE, scmd, "Command for which abort is" + " issued is not found in outstanding commands\n"); + mutex_unlock(&instance->reset_mutex); + goto out; + } + + devhandle = megasas_get_tm_devhandle(scmd->device); + + if (devhandle == (u16)ULONG_MAX) { + ret = FAILED; + sdev_printk(KERN_INFO, scmd->device, + "task abort issued for invalid devhandle\n"); + mutex_unlock(&instance->reset_mutex); + goto out; + } + sdev_printk(KERN_INFO, scmd->device, + "attempting task abort! scmd(0x%p) tm_dev_handle 0x%x\n", + scmd, devhandle); + + mr_device_priv_data->tm_busy = true; + ret = megasas_issue_tm(instance, devhandle, + scmd->device->channel, scmd->device->id, smid, + MPI2_SCSITASKMGMT_TASKTYPE_ABORT_TASK, + mr_device_priv_data); + mr_device_priv_data->tm_busy = false; + + mutex_unlock(&instance->reset_mutex); + scmd_printk(KERN_INFO, scmd, "task abort %s!! scmd(0x%p)\n", + ((ret == SUCCESS) ? "SUCCESS" : "FAILED"), scmd); +out: + scsi_print_command(scmd); + if (megasas_dbg_lvl & TM_DEBUG) + megasas_dump_fusion_io(scmd); + + return ret; +} + +/* + * megasas_reset_target_fusion : target reset function for fusion adapters + * scmd: SCSI command pointer + * + * Returns SUCCESS if all commands associated with target aborted else FAILED + */ + +int megasas_reset_target_fusion(struct scsi_cmnd *scmd) +{ + + struct megasas_instance *instance; + int ret = FAILED; + u16 devhandle; + struct MR_PRIV_DEVICE *mr_device_priv_data; + mr_device_priv_data = scmd->device->hostdata; + + instance = (struct megasas_instance *)scmd->device->host->hostdata; + + if (atomic_read(&instance->adprecovery) != MEGASAS_HBA_OPERATIONAL) { + dev_err(&instance->pdev->dev, "Controller is not OPERATIONAL," + "SCSI host:%d\n", instance->host->host_no); + ret = FAILED; + return ret; + } + + if (!mr_device_priv_data) { + sdev_printk(KERN_INFO, scmd->device, + "device been deleted! scmd: (0x%p)\n", scmd); + scmd->result = DID_NO_CONNECT << 16; + ret = SUCCESS; + goto out; + } + + if (!mr_device_priv_data->is_tm_capable) { + ret = FAILED; + goto out; + } + + mutex_lock(&instance->reset_mutex); + devhandle = megasas_get_tm_devhandle(scmd->device); + + if (devhandle == (u16)ULONG_MAX) { + ret = FAILED; + sdev_printk(KERN_INFO, scmd->device, + "target reset issued for invalid devhandle\n"); + mutex_unlock(&instance->reset_mutex); + goto out; + } + + sdev_printk(KERN_INFO, scmd->device, + "attempting target reset! scmd(0x%p) tm_dev_handle: 0x%x\n", + scmd, devhandle); + mr_device_priv_data->tm_busy = true; + ret = megasas_issue_tm(instance, devhandle, + scmd->device->channel, scmd->device->id, 0, + MPI2_SCSITASKMGMT_TASKTYPE_TARGET_RESET, + mr_device_priv_data); + mr_device_priv_data->tm_busy = false; + mutex_unlock(&instance->reset_mutex); + scmd_printk(KERN_NOTICE, scmd, "target reset %s!!\n", + (ret == SUCCESS) ? "SUCCESS" : "FAILED"); + +out: + return ret; +} + +/*SRIOV get other instance in cluster if any*/ +static struct +megasas_instance *megasas_get_peer_instance(struct megasas_instance *instance) +{ + int i; + + for (i = 0; i < MAX_MGMT_ADAPTERS; i++) { + if (megasas_mgmt_info.instance[i] && + (megasas_mgmt_info.instance[i] != instance) && + megasas_mgmt_info.instance[i]->requestorId && + megasas_mgmt_info.instance[i]->peerIsPresent && + (memcmp((megasas_mgmt_info.instance[i]->clusterId), + instance->clusterId, MEGASAS_CLUSTER_ID_SIZE) == 0)) + return megasas_mgmt_info.instance[i]; + } + return NULL; +} + +/* Check for a second path that is currently UP */ +int megasas_check_mpio_paths(struct megasas_instance *instance, + struct scsi_cmnd *scmd) +{ + struct megasas_instance *peer_instance = NULL; + int retval = (DID_REQUEUE << 16); + + if (instance->peerIsPresent) { + peer_instance = megasas_get_peer_instance(instance); + if ((peer_instance) && + (atomic_read(&peer_instance->adprecovery) == + MEGASAS_HBA_OPERATIONAL)) + retval = (DID_NO_CONNECT << 16); + } + return retval; +} + +/* Core fusion reset function */ +int megasas_reset_fusion(struct Scsi_Host *shost, int reason) +{ + int retval = SUCCESS, i, j, convert = 0; + struct megasas_instance *instance; + struct megasas_cmd_fusion *cmd_fusion, *r1_cmd; + struct fusion_context *fusion; + u32 abs_state, status_reg, reset_adapter, fpio_count = 0; + u32 io_timeout_in_crash_mode = 0; + struct scsi_cmnd *scmd_local = NULL; + struct scsi_device *sdev; + int ret_target_prop = DCMD_FAILED; + bool is_target_prop = false; + bool do_adp_reset = true; + int max_reset_tries = MEGASAS_FUSION_MAX_RESET_TRIES; + + instance = (struct megasas_instance *)shost->hostdata; + fusion = instance->ctrl_context; + + mutex_lock(&instance->reset_mutex); + + if (atomic_read(&instance->adprecovery) == MEGASAS_HW_CRITICAL_ERROR) { + dev_warn(&instance->pdev->dev, "Hardware critical error, " + "returning FAILED for scsi%d.\n", + instance->host->host_no); + mutex_unlock(&instance->reset_mutex); + return FAILED; + } + status_reg = instance->instancet->read_fw_status_reg(instance); + abs_state = status_reg & MFI_STATE_MASK; + + /* IO timeout detected, forcibly put FW in FAULT state */ + if (abs_state != MFI_STATE_FAULT && instance->crash_dump_buf && + instance->crash_dump_app_support && reason) { + dev_info(&instance->pdev->dev, "IO/DCMD timeout is detected, " + "forcibly FAULT Firmware\n"); + atomic_set(&instance->adprecovery, MEGASAS_ADPRESET_SM_INFAULT); + status_reg = megasas_readl(instance, &instance->reg_set->doorbell); + writel(status_reg | MFI_STATE_FORCE_OCR, + &instance->reg_set->doorbell); + readl(&instance->reg_set->doorbell); + mutex_unlock(&instance->reset_mutex); + do { + ssleep(3); + io_timeout_in_crash_mode++; + dev_dbg(&instance->pdev->dev, "waiting for [%d] " + "seconds for crash dump collection and OCR " + "to be done\n", (io_timeout_in_crash_mode * 3)); + } while ((atomic_read(&instance->adprecovery) != MEGASAS_HBA_OPERATIONAL) && + (io_timeout_in_crash_mode < 80)); + + if (atomic_read(&instance->adprecovery) == MEGASAS_HBA_OPERATIONAL) { + dev_info(&instance->pdev->dev, "OCR done for IO " + "timeout case\n"); + retval = SUCCESS; + } else { + dev_info(&instance->pdev->dev, "Controller is not " + "operational after 240 seconds wait for IO " + "timeout case in FW crash dump mode\n do " + "OCR/kill adapter\n"); + retval = megasas_reset_fusion(shost, 0); + } + return retval; + } + + if (instance->requestorId && !instance->skip_heartbeat_timer_del) + del_timer_sync(&instance->sriov_heartbeat_timer); + set_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags); + set_bit(MEGASAS_FUSION_OCR_NOT_POSSIBLE, &instance->reset_flags); + atomic_set(&instance->adprecovery, MEGASAS_ADPRESET_SM_POLLING); + instance->instancet->disable_intr(instance); + megasas_sync_irqs((unsigned long)instance); + + /* First try waiting for commands to complete */ + if (megasas_wait_for_outstanding_fusion(instance, reason, + &convert)) { + atomic_set(&instance->adprecovery, MEGASAS_ADPRESET_SM_INFAULT); + dev_warn(&instance->pdev->dev, "resetting fusion " + "adapter scsi%d.\n", instance->host->host_no); + if (convert) + reason = 0; + + if (megasas_dbg_lvl & OCR_DEBUG) + dev_info(&instance->pdev->dev, "\nPending SCSI commands:\n"); + + /* Now return commands back to the OS */ + for (i = 0 ; i < instance->max_scsi_cmds; i++) { + cmd_fusion = fusion->cmd_list[i]; + /*check for extra commands issued by driver*/ + if (instance->adapter_type >= VENTURA_SERIES) { + r1_cmd = fusion->cmd_list[i + instance->max_fw_cmds]; + megasas_return_cmd_fusion(instance, r1_cmd); + } + scmd_local = cmd_fusion->scmd; + if (cmd_fusion->scmd) { + if (megasas_dbg_lvl & OCR_DEBUG) { + sdev_printk(KERN_INFO, + cmd_fusion->scmd->device, "SMID: 0x%x\n", + cmd_fusion->index); + megasas_dump_fusion_io(cmd_fusion->scmd); + } + + if (cmd_fusion->io_request->Function == + MPI2_FUNCTION_SCSI_IO_REQUEST) + fpio_count++; + + scmd_local->result = + megasas_check_mpio_paths(instance, + scmd_local); + if (instance->ldio_threshold && + megasas_cmd_type(scmd_local) == READ_WRITE_LDIO) + atomic_dec(&instance->ldio_outstanding); + megasas_return_cmd_fusion(instance, cmd_fusion); + scsi_dma_unmap(scmd_local); + scmd_local->scsi_done(scmd_local); + } + } + + dev_info(&instance->pdev->dev, "Outstanding fastpath IOs: %d\n", + fpio_count); + + atomic_set(&instance->fw_outstanding, 0); + + status_reg = instance->instancet->read_fw_status_reg(instance); + abs_state = status_reg & MFI_STATE_MASK; + reset_adapter = status_reg & MFI_RESET_ADAPTER; + if (instance->disableOnlineCtrlReset || + (abs_state == MFI_STATE_FAULT && !reset_adapter)) { + /* Reset not supported, kill adapter */ + dev_warn(&instance->pdev->dev, "Reset not supported" + ", killing adapter scsi%d.\n", + instance->host->host_no); + goto kill_hba; + } + + /* Let SR-IOV VF & PF sync up if there was a HB failure */ + if (instance->requestorId && !reason) { + msleep(MEGASAS_OCR_SETTLE_TIME_VF); + do_adp_reset = false; + max_reset_tries = MEGASAS_SRIOV_MAX_RESET_TRIES_VF; + } + + /* Now try to reset the chip */ + for (i = 0; i < max_reset_tries; i++) { + /* + * Do adp reset and wait for + * controller to transition to ready + */ + if (megasas_adp_reset_wait_for_ready(instance, + do_adp_reset, 1) == FAILED) + continue; + + /* Wait for FW to become ready */ + if (megasas_transition_to_ready(instance, 1)) { + dev_warn(&instance->pdev->dev, + "Failed to transition controller to ready for " + "scsi%d.\n", instance->host->host_no); + continue; + } + megasas_reset_reply_desc(instance); + megasas_fusion_update_can_queue(instance, OCR_CONTEXT); + + if (megasas_ioc_init_fusion(instance)) { + continue; + } + + if (megasas_get_ctrl_info(instance)) { + dev_info(&instance->pdev->dev, + "Failed from %s %d\n", + __func__, __LINE__); + goto kill_hba; + } + + megasas_refire_mgmt_cmd(instance, + (i == (MEGASAS_FUSION_MAX_RESET_TRIES - 1) + ? 1 : 0)); + + /* Reset load balance info */ + if (fusion->load_balance_info) + memset(fusion->load_balance_info, 0, + (sizeof(struct LD_LOAD_BALANCE_INFO) * + MAX_LOGICAL_DRIVES_EXT)); + + if (!megasas_get_map_info(instance)) { + megasas_sync_map_info(instance); + } else { + /* + * Return pending polled mode cmds before + * retrying OCR + */ + megasas_return_polled_cmds(instance); + continue; + } + + megasas_setup_jbod_map(instance); + + /* reset stream detection array */ + if (instance->adapter_type >= VENTURA_SERIES) { + for (j = 0; j < MAX_LOGICAL_DRIVES_EXT; ++j) { + memset(fusion->stream_detect_by_ld[j], + 0, sizeof(struct LD_STREAM_DETECT)); + fusion->stream_detect_by_ld[j]->mru_bit_map + = MR_STREAM_BITMAP; + } + } + + clear_bit(MEGASAS_FUSION_IN_RESET, + &instance->reset_flags); + instance->instancet->enable_intr(instance); + megasas_enable_irq_poll(instance); + shost_for_each_device(sdev, shost) { + if ((instance->tgt_prop) && + (instance->nvme_page_size)) + ret_target_prop = megasas_get_target_prop(instance, sdev); + + is_target_prop = (ret_target_prop == DCMD_SUCCESS) ? true : false; + megasas_set_dynamic_target_properties(sdev, is_target_prop); + } + + status_reg = instance->instancet->read_fw_status_reg + (instance); + abs_state = status_reg & MFI_STATE_MASK; + if (abs_state != MFI_STATE_OPERATIONAL) { + dev_info(&instance->pdev->dev, + "Adapter is not OPERATIONAL, state 0x%x for scsi:%d\n", + abs_state, instance->host->host_no); + goto out; + } + atomic_set(&instance->adprecovery, MEGASAS_HBA_OPERATIONAL); + + dev_info(&instance->pdev->dev, + "Adapter is OPERATIONAL for scsi:%d\n", + instance->host->host_no); + + /* Restart SR-IOV heartbeat */ + if (instance->requestorId) { + if (!megasas_sriov_start_heartbeat(instance, 0)) + megasas_start_timer(instance); + else + instance->skip_heartbeat_timer_del = 1; + } + + if (instance->crash_dump_drv_support && + instance->crash_dump_app_support) + megasas_set_crash_dump_params(instance, + MR_CRASH_BUF_TURN_ON); + else + megasas_set_crash_dump_params(instance, + MR_CRASH_BUF_TURN_OFF); + + if (instance->snapdump_wait_time) { + megasas_get_snapdump_properties(instance); + dev_info(&instance->pdev->dev, + "Snap dump wait time\t: %d\n", + instance->snapdump_wait_time); + } + + retval = SUCCESS; + + /* Adapter reset completed successfully */ + dev_warn(&instance->pdev->dev, + "Reset successful for scsi%d.\n", + instance->host->host_no); + + goto out; + } + /* Reset failed, kill the adapter */ + dev_warn(&instance->pdev->dev, "Reset failed, killing " + "adapter scsi%d.\n", instance->host->host_no); + goto kill_hba; + } else { + /* For VF: Restart HB timer if we didn't OCR */ + if (instance->requestorId) { + megasas_start_timer(instance); + } + clear_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags); + instance->instancet->enable_intr(instance); + megasas_enable_irq_poll(instance); + atomic_set(&instance->adprecovery, MEGASAS_HBA_OPERATIONAL); + goto out; + } +kill_hba: + megaraid_sas_kill_hba(instance); + megasas_enable_irq_poll(instance); + instance->skip_heartbeat_timer_del = 1; + retval = FAILED; +out: + clear_bit(MEGASAS_FUSION_OCR_NOT_POSSIBLE, &instance->reset_flags); + mutex_unlock(&instance->reset_mutex); + return retval; +} + +/* Fusion Crash dump collection */ +static void megasas_fusion_crash_dump(struct megasas_instance *instance) +{ + u32 status_reg; + u8 partial_copy = 0; + int wait = 0; + + + status_reg = instance->instancet->read_fw_status_reg(instance); + + /* + * Allocate host crash buffers to copy data from 1 MB DMA crash buffer + * to host crash buffers + */ + if (instance->drv_buf_index == 0) { + /* Buffer is already allocated for old Crash dump. + * Do OCR and do not wait for crash dump collection + */ + if (instance->drv_buf_alloc) { + dev_info(&instance->pdev->dev, "earlier crash dump is " + "not yet copied by application, ignoring this " + "crash dump and initiating OCR\n"); + status_reg |= MFI_STATE_CRASH_DUMP_DONE; + writel(status_reg, + &instance->reg_set->outbound_scratch_pad_0); + readl(&instance->reg_set->outbound_scratch_pad_0); + return; + } + megasas_alloc_host_crash_buffer(instance); + dev_info(&instance->pdev->dev, "Number of host crash buffers " + "allocated: %d\n", instance->drv_buf_alloc); + } + + while (!(status_reg & MFI_STATE_CRASH_DUMP_DONE) && + (wait < MEGASAS_WATCHDOG_WAIT_COUNT)) { + if (!(status_reg & MFI_STATE_DMADONE)) { + /* + * Next crash dump buffer is not yet DMA'd by FW + * Check after 10ms. Wait for 1 second for FW to + * post the next buffer. If not bail out. + */ + wait++; + msleep(MEGASAS_WAIT_FOR_NEXT_DMA_MSECS); + status_reg = instance->instancet->read_fw_status_reg( + instance); + continue; + } + + wait = 0; + if (instance->drv_buf_index >= instance->drv_buf_alloc) { + dev_info(&instance->pdev->dev, + "Driver is done copying the buffer: %d\n", + instance->drv_buf_alloc); + status_reg |= MFI_STATE_CRASH_DUMP_DONE; + partial_copy = 1; + break; + } else { + memcpy(instance->crash_buf[instance->drv_buf_index], + instance->crash_dump_buf, CRASH_DMA_BUF_SIZE); + instance->drv_buf_index++; + status_reg &= ~MFI_STATE_DMADONE; + } + + writel(status_reg, &instance->reg_set->outbound_scratch_pad_0); + readl(&instance->reg_set->outbound_scratch_pad_0); + + msleep(MEGASAS_WAIT_FOR_NEXT_DMA_MSECS); + status_reg = instance->instancet->read_fw_status_reg(instance); + } + + if (status_reg & MFI_STATE_CRASH_DUMP_DONE) { + dev_info(&instance->pdev->dev, "Crash Dump is available,number " + "of copied buffers: %d\n", instance->drv_buf_index); + instance->fw_crash_buffer_size = instance->drv_buf_index; + instance->fw_crash_state = AVAILABLE; + instance->drv_buf_index = 0; + writel(status_reg, &instance->reg_set->outbound_scratch_pad_0); + readl(&instance->reg_set->outbound_scratch_pad_0); + if (!partial_copy) + megasas_reset_fusion(instance->host, 0); + } +} + + +/* Fusion OCR work queue */ +void megasas_fusion_ocr_wq(struct work_struct *work) +{ + struct megasas_instance *instance = + container_of(work, struct megasas_instance, work_init); + + megasas_reset_fusion(instance->host, 0); +} + +/* Allocate fusion context */ +int +megasas_alloc_fusion_context(struct megasas_instance *instance) +{ + struct fusion_context *fusion; + + instance->ctrl_context = kzalloc(sizeof(struct fusion_context), + GFP_KERNEL); + if (!instance->ctrl_context) { + dev_err(&instance->pdev->dev, "Failed from %s %d\n", + __func__, __LINE__); + return -ENOMEM; + } + + fusion = instance->ctrl_context; + + fusion->log_to_span_pages = get_order(MAX_LOGICAL_DRIVES_EXT * + sizeof(LD_SPAN_INFO)); + fusion->log_to_span = + (PLD_SPAN_INFO)__get_free_pages(GFP_KERNEL | __GFP_ZERO, + fusion->log_to_span_pages); + if (!fusion->log_to_span) { + fusion->log_to_span = + vzalloc(array_size(MAX_LOGICAL_DRIVES_EXT, + sizeof(LD_SPAN_INFO))); + if (!fusion->log_to_span) { + dev_err(&instance->pdev->dev, "Failed from %s %d\n", + __func__, __LINE__); + return -ENOMEM; + } + } + + fusion->load_balance_info_pages = get_order(MAX_LOGICAL_DRIVES_EXT * + sizeof(struct LD_LOAD_BALANCE_INFO)); + fusion->load_balance_info = + (struct LD_LOAD_BALANCE_INFO *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, + fusion->load_balance_info_pages); + if (!fusion->load_balance_info) { + fusion->load_balance_info = + vzalloc(array_size(MAX_LOGICAL_DRIVES_EXT, + sizeof(struct LD_LOAD_BALANCE_INFO))); + if (!fusion->load_balance_info) + dev_err(&instance->pdev->dev, "Failed to allocate load_balance_info, " + "continuing without Load Balance support\n"); + } + + return 0; +} + +void +megasas_free_fusion_context(struct megasas_instance *instance) +{ + struct fusion_context *fusion = instance->ctrl_context; + + if (fusion) { + if (fusion->load_balance_info) { + if (is_vmalloc_addr(fusion->load_balance_info)) + vfree(fusion->load_balance_info); + else + free_pages((ulong)fusion->load_balance_info, + fusion->load_balance_info_pages); + } + + if (fusion->log_to_span) { + if (is_vmalloc_addr(fusion->log_to_span)) + vfree(fusion->log_to_span); + else + free_pages((ulong)fusion->log_to_span, + fusion->log_to_span_pages); + } + + kfree(fusion); + } +} + +struct megasas_instance_template megasas_instance_template_fusion = { + .enable_intr = megasas_enable_intr_fusion, + .disable_intr = megasas_disable_intr_fusion, + .clear_intr = megasas_clear_intr_fusion, + .read_fw_status_reg = megasas_read_fw_status_reg_fusion, + .adp_reset = megasas_adp_reset_fusion, + .check_reset = megasas_check_reset_fusion, + .service_isr = megasas_isr_fusion, + .tasklet = megasas_complete_cmd_dpc_fusion, + .init_adapter = megasas_init_adapter_fusion, + .build_and_issue_cmd = megasas_build_and_issue_cmd_fusion, + .issue_dcmd = megasas_issue_dcmd_fusion, +}; |