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Diffstat (limited to '')
| -rw-r--r-- | drivers/scsi/megaraid.c | 4636 |
1 files changed, 4636 insertions, 0 deletions
diff --git a/drivers/scsi/megaraid.c b/drivers/scsi/megaraid.c new file mode 100644 index 000000000..16e2cf848 --- /dev/null +++ b/drivers/scsi/megaraid.c @@ -0,0 +1,4636 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * + * Linux MegaRAID device driver + * + * Copyright (c) 2002 LSI Logic Corporation. + * + * Copyright (c) 2002 Red Hat, Inc. All rights reserved. + * - fixes + * - speed-ups (list handling fixes, issued_list, optimizations.) + * - lots of cleanups. + * + * Copyright (c) 2003 Christoph Hellwig <hch@lst.de> + * - new-style, hotplug-aware pci probing and scsi registration + * + * Version : v2.00.4 Mon Nov 14 14:02:43 EST 2005 - Seokmann Ju + * <Seokmann.Ju@lsil.com> + * + * Description: Linux device driver for LSI Logic MegaRAID controller + * + * Supported controllers: MegaRAID 418, 428, 438, 466, 762, 467, 471, 490, 493 + * 518, 520, 531, 532 + * + * This driver is supported by LSI Logic, with assistance from Red Hat, Dell, + * and others. Please send updates to the mailing list + * linux-scsi@vger.kernel.org . + */ + +#include <linux/mm.h> +#include <linux/fs.h> +#include <linux/blkdev.h> +#include <linux/uaccess.h> +#include <asm/io.h> +#include <linux/completion.h> +#include <linux/delay.h> +#include <linux/proc_fs.h> +#include <linux/seq_file.h> +#include <linux/reboot.h> +#include <linux/module.h> +#include <linux/list.h> +#include <linux/interrupt.h> +#include <linux/pci.h> +#include <linux/init.h> +#include <linux/dma-mapping.h> +#include <linux/mutex.h> +#include <linux/slab.h> + +#include <scsi/scsi.h> +#include <scsi/scsi_cmnd.h> +#include <scsi/scsi_device.h> +#include <scsi/scsi_eh.h> +#include <scsi/scsi_host.h> +#include <scsi/scsi_tcq.h> +#include <scsi/scsicam.h> + +#include "megaraid.h" + +#define MEGARAID_MODULE_VERSION "2.00.4" + +MODULE_AUTHOR ("sju@lsil.com"); +MODULE_DESCRIPTION ("LSI Logic MegaRAID legacy driver"); +MODULE_LICENSE ("GPL"); +MODULE_VERSION(MEGARAID_MODULE_VERSION); + +static DEFINE_MUTEX(megadev_mutex); +static unsigned int max_cmd_per_lun = DEF_CMD_PER_LUN; +module_param(max_cmd_per_lun, uint, 0); +MODULE_PARM_DESC(max_cmd_per_lun, "Maximum number of commands which can be issued to a single LUN (default=DEF_CMD_PER_LUN=63)"); + +static unsigned short int max_sectors_per_io = MAX_SECTORS_PER_IO; +module_param(max_sectors_per_io, ushort, 0); +MODULE_PARM_DESC(max_sectors_per_io, "Maximum number of sectors per I/O request (default=MAX_SECTORS_PER_IO=128)"); + + +static unsigned short int max_mbox_busy_wait = MBOX_BUSY_WAIT; +module_param(max_mbox_busy_wait, ushort, 0); +MODULE_PARM_DESC(max_mbox_busy_wait, "Maximum wait for mailbox in microseconds if busy (default=MBOX_BUSY_WAIT=10)"); + +#define RDINDOOR(adapter) readl((adapter)->mmio_base + 0x20) +#define RDOUTDOOR(adapter) readl((adapter)->mmio_base + 0x2C) +#define WRINDOOR(adapter,value) writel(value, (adapter)->mmio_base + 0x20) +#define WROUTDOOR(adapter,value) writel(value, (adapter)->mmio_base + 0x2C) + +/* + * Global variables + */ + +static int hba_count; +static adapter_t *hba_soft_state[MAX_CONTROLLERS]; +static struct proc_dir_entry *mega_proc_dir_entry; + +/* For controller re-ordering */ +static struct mega_hbas mega_hbas[MAX_CONTROLLERS]; + +static long +megadev_unlocked_ioctl(struct file *filep, unsigned int cmd, unsigned long arg); + +/* + * The File Operations structure for the serial/ioctl interface of the driver + */ +static const struct file_operations megadev_fops = { + .owner = THIS_MODULE, + .unlocked_ioctl = megadev_unlocked_ioctl, + .open = megadev_open, + .llseek = noop_llseek, +}; + +/* + * Array to structures for storing the information about the controllers. This + * information is sent to the user level applications, when they do an ioctl + * for this information. + */ +static struct mcontroller mcontroller[MAX_CONTROLLERS]; + +/* The current driver version */ +static u32 driver_ver = 0x02000000; + +/* major number used by the device for character interface */ +static int major; + +#define IS_RAID_CH(hba, ch) (((hba)->mega_ch_class >> (ch)) & 0x01) + + +/* + * Debug variable to print some diagnostic messages + */ +static int trace_level; + +/** + * mega_setup_mailbox() + * @adapter: pointer to our soft state + * + * Allocates a 8 byte aligned memory for the handshake mailbox. + */ +static int +mega_setup_mailbox(adapter_t *adapter) +{ + unsigned long align; + + adapter->una_mbox64 = dma_alloc_coherent(&adapter->dev->dev, + sizeof(mbox64_t), + &adapter->una_mbox64_dma, + GFP_KERNEL); + + if( !adapter->una_mbox64 ) return -1; + + adapter->mbox = &adapter->una_mbox64->mbox; + + adapter->mbox = (mbox_t *)((((unsigned long) adapter->mbox) + 15) & + (~0UL ^ 0xFUL)); + + adapter->mbox64 = (mbox64_t *)(((unsigned long)adapter->mbox) - 8); + + align = ((void *)adapter->mbox) - ((void *)&adapter->una_mbox64->mbox); + + adapter->mbox_dma = adapter->una_mbox64_dma + 8 + align; + + /* + * Register the mailbox if the controller is an io-mapped controller + */ + if( adapter->flag & BOARD_IOMAP ) { + + outb(adapter->mbox_dma & 0xFF, + adapter->host->io_port + MBOX_PORT0); + + outb((adapter->mbox_dma >> 8) & 0xFF, + adapter->host->io_port + MBOX_PORT1); + + outb((adapter->mbox_dma >> 16) & 0xFF, + adapter->host->io_port + MBOX_PORT2); + + outb((adapter->mbox_dma >> 24) & 0xFF, + adapter->host->io_port + MBOX_PORT3); + + outb(ENABLE_MBOX_BYTE, + adapter->host->io_port + ENABLE_MBOX_REGION); + + irq_ack(adapter); + + irq_enable(adapter); + } + + return 0; +} + + +/* + * mega_query_adapter() + * @adapter - pointer to our soft state + * + * Issue the adapter inquiry commands to the controller and find out + * information and parameter about the devices attached + */ +static int +mega_query_adapter(adapter_t *adapter) +{ + dma_addr_t prod_info_dma_handle; + mega_inquiry3 *inquiry3; + struct mbox_out mbox; + u8 *raw_mbox = (u8 *)&mbox; + int retval; + + /* Initialize adapter inquiry mailbox */ + + memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE); + memset(&mbox, 0, sizeof(mbox)); + + /* + * Try to issue Inquiry3 command + * if not succeeded, then issue MEGA_MBOXCMD_ADAPTERINQ command and + * update enquiry3 structure + */ + mbox.xferaddr = (u32)adapter->buf_dma_handle; + + inquiry3 = (mega_inquiry3 *)adapter->mega_buffer; + + raw_mbox[0] = FC_NEW_CONFIG; /* i.e. mbox->cmd=0xA1 */ + raw_mbox[2] = NC_SUBOP_ENQUIRY3; /* i.e. 0x0F */ + raw_mbox[3] = ENQ3_GET_SOLICITED_FULL; /* i.e. 0x02 */ + + /* Issue a blocking command to the card */ + if ((retval = issue_scb_block(adapter, raw_mbox))) { + /* the adapter does not support 40ld */ + + mraid_ext_inquiry *ext_inq; + mraid_inquiry *inq; + dma_addr_t dma_handle; + + ext_inq = dma_alloc_coherent(&adapter->dev->dev, + sizeof(mraid_ext_inquiry), + &dma_handle, GFP_KERNEL); + + if( ext_inq == NULL ) return -1; + + inq = &ext_inq->raid_inq; + + mbox.xferaddr = (u32)dma_handle; + + /*issue old 0x04 command to adapter */ + mbox.cmd = MEGA_MBOXCMD_ADPEXTINQ; + + issue_scb_block(adapter, raw_mbox); + + /* + * update Enquiry3 and ProductInfo structures with + * mraid_inquiry structure + */ + mega_8_to_40ld(inq, inquiry3, + (mega_product_info *)&adapter->product_info); + + dma_free_coherent(&adapter->dev->dev, + sizeof(mraid_ext_inquiry), ext_inq, + dma_handle); + + } else { /*adapter supports 40ld */ + adapter->flag |= BOARD_40LD; + + /* + * get product_info, which is static information and will be + * unchanged + */ + prod_info_dma_handle = dma_map_single(&adapter->dev->dev, + (void *)&adapter->product_info, + sizeof(mega_product_info), + DMA_FROM_DEVICE); + + mbox.xferaddr = prod_info_dma_handle; + + raw_mbox[0] = FC_NEW_CONFIG; /* i.e. mbox->cmd=0xA1 */ + raw_mbox[2] = NC_SUBOP_PRODUCT_INFO; /* i.e. 0x0E */ + + if ((retval = issue_scb_block(adapter, raw_mbox))) + dev_warn(&adapter->dev->dev, + "Product_info cmd failed with error: %d\n", + retval); + + dma_unmap_single(&adapter->dev->dev, prod_info_dma_handle, + sizeof(mega_product_info), DMA_FROM_DEVICE); + } + + + /* + * kernel scans the channels from 0 to <= max_channel + */ + adapter->host->max_channel = + adapter->product_info.nchannels + NVIRT_CHAN -1; + + adapter->host->max_id = 16; /* max targets per channel */ + + adapter->host->max_lun = 7; /* Up to 7 luns for non disk devices */ + + adapter->host->cmd_per_lun = max_cmd_per_lun; + + adapter->numldrv = inquiry3->num_ldrv; + + adapter->max_cmds = adapter->product_info.max_commands; + + if(adapter->max_cmds > MAX_COMMANDS) + adapter->max_cmds = MAX_COMMANDS; + + adapter->host->can_queue = adapter->max_cmds - 1; + + /* + * Get the maximum number of scatter-gather elements supported by this + * firmware + */ + mega_get_max_sgl(adapter); + + adapter->host->sg_tablesize = adapter->sglen; + + /* use HP firmware and bios version encoding + Note: fw_version[0|1] and bios_version[0|1] were originally shifted + right 8 bits making them zero. This 0 value was hardcoded to fix + sparse warnings. */ + if (adapter->product_info.subsysvid == PCI_VENDOR_ID_HP) { + snprintf(adapter->fw_version, sizeof(adapter->fw_version), + "%c%d%d.%d%d", + adapter->product_info.fw_version[2], + 0, + adapter->product_info.fw_version[1] & 0x0f, + 0, + adapter->product_info.fw_version[0] & 0x0f); + snprintf(adapter->bios_version, sizeof(adapter->fw_version), + "%c%d%d.%d%d", + adapter->product_info.bios_version[2], + 0, + adapter->product_info.bios_version[1] & 0x0f, + 0, + adapter->product_info.bios_version[0] & 0x0f); + } else { + memcpy(adapter->fw_version, + (char *)adapter->product_info.fw_version, 4); + adapter->fw_version[4] = 0; + + memcpy(adapter->bios_version, + (char *)adapter->product_info.bios_version, 4); + + adapter->bios_version[4] = 0; + } + + dev_notice(&adapter->dev->dev, "[%s:%s] detected %d logical drives\n", + adapter->fw_version, adapter->bios_version, adapter->numldrv); + + /* + * Do we support extended (>10 bytes) cdbs + */ + adapter->support_ext_cdb = mega_support_ext_cdb(adapter); + if (adapter->support_ext_cdb) + dev_notice(&adapter->dev->dev, "supports extended CDBs\n"); + + + return 0; +} + +/** + * mega_runpendq() + * @adapter: pointer to our soft state + * + * Runs through the list of pending requests. + */ +static inline void +mega_runpendq(adapter_t *adapter) +{ + if(!list_empty(&adapter->pending_list)) + __mega_runpendq(adapter); +} + +/* + * megaraid_queue() + * @scmd - Issue this scsi command + * @done - the callback hook into the scsi mid-layer + * + * The command queuing entry point for the mid-layer. + */ +static int megaraid_queue_lck(struct scsi_cmnd *scmd) +{ + adapter_t *adapter; + scb_t *scb; + int busy=0; + unsigned long flags; + + adapter = (adapter_t *)scmd->device->host->hostdata; + + /* + * Allocate and build a SCB request + * busy flag will be set if mega_build_cmd() command could not + * allocate scb. We will return non-zero status in that case. + * NOTE: scb can be null even though certain commands completed + * successfully, e.g., MODE_SENSE and TEST_UNIT_READY, we would + * return 0 in that case. + */ + + spin_lock_irqsave(&adapter->lock, flags); + scb = mega_build_cmd(adapter, scmd, &busy); + if (!scb) + goto out; + + scb->state |= SCB_PENDQ; + list_add_tail(&scb->list, &adapter->pending_list); + + /* + * Check if the HBA is in quiescent state, e.g., during a + * delete logical drive opertion. If it is, don't run + * the pending_list. + */ + if (atomic_read(&adapter->quiescent) == 0) + mega_runpendq(adapter); + + busy = 0; + out: + spin_unlock_irqrestore(&adapter->lock, flags); + return busy; +} + +static DEF_SCSI_QCMD(megaraid_queue) + +/** + * mega_allocate_scb() + * @adapter: pointer to our soft state + * @cmd: scsi command from the mid-layer + * + * Allocate a SCB structure. This is the central structure for controller + * commands. + */ +static inline scb_t * +mega_allocate_scb(adapter_t *adapter, struct scsi_cmnd *cmd) +{ + struct list_head *head = &adapter->free_list; + scb_t *scb; + + /* Unlink command from Free List */ + if( !list_empty(head) ) { + + scb = list_entry(head->next, scb_t, list); + + list_del_init(head->next); + + scb->state = SCB_ACTIVE; + scb->cmd = cmd; + scb->dma_type = MEGA_DMA_TYPE_NONE; + + return scb; + } + + return NULL; +} + +/** + * mega_get_ldrv_num() + * @adapter: pointer to our soft state + * @cmd: scsi mid layer command + * @channel: channel on the controller + * + * Calculate the logical drive number based on the information in scsi command + * and the channel number. + */ +static inline int +mega_get_ldrv_num(adapter_t *adapter, struct scsi_cmnd *cmd, int channel) +{ + int tgt; + int ldrv_num; + + tgt = cmd->device->id; + + if ( tgt > adapter->this_id ) + tgt--; /* we do not get inquires for initiator id */ + + ldrv_num = (channel * 15) + tgt; + + + /* + * If we have a logical drive with boot enabled, project it first + */ + if( adapter->boot_ldrv_enabled ) { + if( ldrv_num == 0 ) { + ldrv_num = adapter->boot_ldrv; + } + else { + if( ldrv_num <= adapter->boot_ldrv ) { + ldrv_num--; + } + } + } + + /* + * If "delete logical drive" feature is enabled on this controller. + * Do only if at least one delete logical drive operation was done. + * + * Also, after logical drive deletion, instead of logical drive number, + * the value returned should be 0x80+logical drive id. + * + * These is valid only for IO commands. + */ + + if (adapter->support_random_del && adapter->read_ldidmap ) + switch (cmd->cmnd[0]) { + case READ_6: + case WRITE_6: + case READ_10: + case WRITE_10: + ldrv_num += 0x80; + } + + return ldrv_num; +} + +/** + * mega_build_cmd() + * @adapter: pointer to our soft state + * @cmd: Prepare using this scsi command + * @busy: busy flag if no resources + * + * Prepares a command and scatter gather list for the controller. This routine + * also finds out if the commands is intended for a logical drive or a + * physical device and prepares the controller command accordingly. + * + * We also re-order the logical drives and physical devices based on their + * boot settings. + */ +static scb_t * +mega_build_cmd(adapter_t *adapter, struct scsi_cmnd *cmd, int *busy) +{ + mega_passthru *pthru; + scb_t *scb; + mbox_t *mbox; + u32 seg; + char islogical; + int max_ldrv_num; + int channel = 0; + int target = 0; + int ldrv_num = 0; /* logical drive number */ + + /* + * We know what channels our logical drives are on - mega_find_card() + */ + islogical = adapter->logdrv_chan[cmd->device->channel]; + + /* + * The theory: If physical drive is chosen for boot, all the physical + * devices are exported before the logical drives, otherwise physical + * devices are pushed after logical drives, in which case - Kernel sees + * the physical devices on virtual channel which is obviously converted + * to actual channel on the HBA. + */ + if( adapter->boot_pdrv_enabled ) { + if( islogical ) { + /* logical channel */ + channel = cmd->device->channel - + adapter->product_info.nchannels; + } + else { + /* this is physical channel */ + channel = cmd->device->channel; + target = cmd->device->id; + + /* + * boot from a physical disk, that disk needs to be + * exposed first IF both the channels are SCSI, then + * booting from the second channel is not allowed. + */ + if( target == 0 ) { + target = adapter->boot_pdrv_tgt; + } + else if( target == adapter->boot_pdrv_tgt ) { + target = 0; + } + } + } + else { + if( islogical ) { + /* this is the logical channel */ + channel = cmd->device->channel; + } + else { + /* physical channel */ + channel = cmd->device->channel - NVIRT_CHAN; + target = cmd->device->id; + } + } + + + if(islogical) { + + /* have just LUN 0 for each target on virtual channels */ + if (cmd->device->lun) { + cmd->result = (DID_BAD_TARGET << 16); + scsi_done(cmd); + return NULL; + } + + ldrv_num = mega_get_ldrv_num(adapter, cmd, channel); + + + max_ldrv_num = (adapter->flag & BOARD_40LD) ? + MAX_LOGICAL_DRIVES_40LD : MAX_LOGICAL_DRIVES_8LD; + + /* + * max_ldrv_num increases by 0x80 if some logical drive was + * deleted. + */ + if(adapter->read_ldidmap) + max_ldrv_num += 0x80; + + if(ldrv_num > max_ldrv_num ) { + cmd->result = (DID_BAD_TARGET << 16); + scsi_done(cmd); + return NULL; + } + + } + else { + if( cmd->device->lun > 7) { + /* + * Do not support lun >7 for physically accessed + * devices + */ + cmd->result = (DID_BAD_TARGET << 16); + scsi_done(cmd); + return NULL; + } + } + + /* + * + * Logical drive commands + * + */ + if(islogical) { + switch (cmd->cmnd[0]) { + case TEST_UNIT_READY: +#if MEGA_HAVE_CLUSTERING + /* + * Do we support clustering and is the support enabled + * If no, return success always + */ + if( !adapter->has_cluster ) { + cmd->result = (DID_OK << 16); + scsi_done(cmd); + return NULL; + } + + if(!(scb = mega_allocate_scb(adapter, cmd))) { + *busy = 1; + return NULL; + } + + scb->raw_mbox[0] = MEGA_CLUSTER_CMD; + scb->raw_mbox[2] = MEGA_RESERVATION_STATUS; + scb->raw_mbox[3] = ldrv_num; + + scb->dma_direction = DMA_NONE; + + return scb; +#else + cmd->result = (DID_OK << 16); + scsi_done(cmd); + return NULL; +#endif + + case MODE_SENSE: { + char *buf; + struct scatterlist *sg; + + sg = scsi_sglist(cmd); + buf = kmap_atomic(sg_page(sg)) + sg->offset; + + memset(buf, 0, cmd->cmnd[4]); + kunmap_atomic(buf - sg->offset); + + cmd->result = (DID_OK << 16); + scsi_done(cmd); + return NULL; + } + + case READ_CAPACITY: + case INQUIRY: + + if(!(adapter->flag & (1L << cmd->device->channel))) { + + dev_notice(&adapter->dev->dev, + "scsi%d: scanning scsi channel %d " + "for logical drives\n", + adapter->host->host_no, + cmd->device->channel); + + adapter->flag |= (1L << cmd->device->channel); + } + + /* Allocate a SCB and initialize passthru */ + if(!(scb = mega_allocate_scb(adapter, cmd))) { + *busy = 1; + return NULL; + } + pthru = scb->pthru; + + mbox = (mbox_t *)scb->raw_mbox; + memset(mbox, 0, sizeof(scb->raw_mbox)); + memset(pthru, 0, sizeof(mega_passthru)); + + pthru->timeout = 0; + pthru->ars = 1; + pthru->reqsenselen = 14; + pthru->islogical = 1; + pthru->logdrv = ldrv_num; + pthru->cdblen = cmd->cmd_len; + memcpy(pthru->cdb, cmd->cmnd, cmd->cmd_len); + + if( adapter->has_64bit_addr ) { + mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU64; + } + else { + mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU; + } + + scb->dma_direction = DMA_FROM_DEVICE; + + pthru->numsgelements = mega_build_sglist(adapter, scb, + &pthru->dataxferaddr, &pthru->dataxferlen); + + mbox->m_out.xferaddr = scb->pthru_dma_addr; + + return scb; + + case READ_6: + case WRITE_6: + case READ_10: + case WRITE_10: + case READ_12: + case WRITE_12: + + /* Allocate a SCB and initialize mailbox */ + if(!(scb = mega_allocate_scb(adapter, cmd))) { + *busy = 1; + return NULL; + } + mbox = (mbox_t *)scb->raw_mbox; + + memset(mbox, 0, sizeof(scb->raw_mbox)); + mbox->m_out.logdrv = ldrv_num; + + /* + * A little hack: 2nd bit is zero for all scsi read + * commands and is set for all scsi write commands + */ + if( adapter->has_64bit_addr ) { + mbox->m_out.cmd = (*cmd->cmnd & 0x02) ? + MEGA_MBOXCMD_LWRITE64: + MEGA_MBOXCMD_LREAD64 ; + } + else { + mbox->m_out.cmd = (*cmd->cmnd & 0x02) ? + MEGA_MBOXCMD_LWRITE: + MEGA_MBOXCMD_LREAD ; + } + + /* + * 6-byte READ(0x08) or WRITE(0x0A) cdb + */ + if( cmd->cmd_len == 6 ) { + mbox->m_out.numsectors = (u32) cmd->cmnd[4]; + mbox->m_out.lba = + ((u32)cmd->cmnd[1] << 16) | + ((u32)cmd->cmnd[2] << 8) | + (u32)cmd->cmnd[3]; + + mbox->m_out.lba &= 0x1FFFFF; + +#if MEGA_HAVE_STATS + /* + * Take modulo 0x80, since the logical drive + * number increases by 0x80 when a logical + * drive was deleted + */ + if (*cmd->cmnd == READ_6) { + adapter->nreads[ldrv_num%0x80]++; + adapter->nreadblocks[ldrv_num%0x80] += + mbox->m_out.numsectors; + } else { + adapter->nwrites[ldrv_num%0x80]++; + adapter->nwriteblocks[ldrv_num%0x80] += + mbox->m_out.numsectors; + } +#endif + } + + /* + * 10-byte READ(0x28) or WRITE(0x2A) cdb + */ + if( cmd->cmd_len == 10 ) { + mbox->m_out.numsectors = + (u32)cmd->cmnd[8] | + ((u32)cmd->cmnd[7] << 8); + mbox->m_out.lba = + ((u32)cmd->cmnd[2] << 24) | + ((u32)cmd->cmnd[3] << 16) | + ((u32)cmd->cmnd[4] << 8) | + (u32)cmd->cmnd[5]; + +#if MEGA_HAVE_STATS + if (*cmd->cmnd == READ_10) { + adapter->nreads[ldrv_num%0x80]++; + adapter->nreadblocks[ldrv_num%0x80] += + mbox->m_out.numsectors; + } else { + adapter->nwrites[ldrv_num%0x80]++; + adapter->nwriteblocks[ldrv_num%0x80] += + mbox->m_out.numsectors; + } +#endif + } + + /* + * 12-byte READ(0xA8) or WRITE(0xAA) cdb + */ + if( cmd->cmd_len == 12 ) { + mbox->m_out.lba = + ((u32)cmd->cmnd[2] << 24) | + ((u32)cmd->cmnd[3] << 16) | + ((u32)cmd->cmnd[4] << 8) | + (u32)cmd->cmnd[5]; + + mbox->m_out.numsectors = + ((u32)cmd->cmnd[6] << 24) | + ((u32)cmd->cmnd[7] << 16) | + ((u32)cmd->cmnd[8] << 8) | + (u32)cmd->cmnd[9]; + +#if MEGA_HAVE_STATS + if (*cmd->cmnd == READ_12) { + adapter->nreads[ldrv_num%0x80]++; + adapter->nreadblocks[ldrv_num%0x80] += + mbox->m_out.numsectors; + } else { + adapter->nwrites[ldrv_num%0x80]++; + adapter->nwriteblocks[ldrv_num%0x80] += + mbox->m_out.numsectors; + } +#endif + } + + /* + * If it is a read command + */ + if( (*cmd->cmnd & 0x0F) == 0x08 ) { + scb->dma_direction = DMA_FROM_DEVICE; + } + else { + scb->dma_direction = DMA_TO_DEVICE; + } + + /* Calculate Scatter-Gather info */ + mbox->m_out.numsgelements = mega_build_sglist(adapter, scb, + (u32 *)&mbox->m_out.xferaddr, &seg); + + return scb; + +#if MEGA_HAVE_CLUSTERING + case RESERVE: + case RELEASE: + + /* + * Do we support clustering and is the support enabled + */ + if( ! adapter->has_cluster ) { + + cmd->result = (DID_BAD_TARGET << 16); + scsi_done(cmd); + return NULL; + } + + /* Allocate a SCB and initialize mailbox */ + if(!(scb = mega_allocate_scb(adapter, cmd))) { + *busy = 1; + return NULL; + } + + scb->raw_mbox[0] = MEGA_CLUSTER_CMD; + scb->raw_mbox[2] = ( *cmd->cmnd == RESERVE ) ? + MEGA_RESERVE_LD : MEGA_RELEASE_LD; + + scb->raw_mbox[3] = ldrv_num; + + scb->dma_direction = DMA_NONE; + + return scb; +#endif + + default: + cmd->result = (DID_BAD_TARGET << 16); + scsi_done(cmd); + return NULL; + } + } + + /* + * Passthru drive commands + */ + else { + /* Allocate a SCB and initialize passthru */ + if(!(scb = mega_allocate_scb(adapter, cmd))) { + *busy = 1; + return NULL; + } + + mbox = (mbox_t *)scb->raw_mbox; + memset(mbox, 0, sizeof(scb->raw_mbox)); + + if( adapter->support_ext_cdb ) { + + mega_prepare_extpassthru(adapter, scb, cmd, + channel, target); + + mbox->m_out.cmd = MEGA_MBOXCMD_EXTPTHRU; + + mbox->m_out.xferaddr = scb->epthru_dma_addr; + + } + else { + + pthru = mega_prepare_passthru(adapter, scb, cmd, + channel, target); + + /* Initialize mailbox */ + if( adapter->has_64bit_addr ) { + mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU64; + } + else { + mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU; + } + + mbox->m_out.xferaddr = scb->pthru_dma_addr; + + } + return scb; + } + return NULL; +} + + +/** + * mega_prepare_passthru() + * @adapter: pointer to our soft state + * @scb: our scsi control block + * @cmd: scsi command from the mid-layer + * @channel: actual channel on the controller + * @target: actual id on the controller. + * + * prepare a command for the scsi physical devices. + */ +static mega_passthru * +mega_prepare_passthru(adapter_t *adapter, scb_t *scb, struct scsi_cmnd *cmd, + int channel, int target) +{ + mega_passthru *pthru; + + pthru = scb->pthru; + memset(pthru, 0, sizeof (mega_passthru)); + + /* 0=6sec/1=60sec/2=10min/3=3hrs */ + pthru->timeout = 2; + + pthru->ars = 1; + pthru->reqsenselen = 14; + pthru->islogical = 0; + + pthru->channel = (adapter->flag & BOARD_40LD) ? 0 : channel; + + pthru->target = (adapter->flag & BOARD_40LD) ? + (channel << 4) | target : target; + + pthru->cdblen = cmd->cmd_len; + pthru->logdrv = cmd->device->lun; + + memcpy(pthru->cdb, cmd->cmnd, cmd->cmd_len); + + /* Not sure about the direction */ + scb->dma_direction = DMA_BIDIRECTIONAL; + + /* Special Code for Handling READ_CAPA/ INQ using bounce buffers */ + switch (cmd->cmnd[0]) { + case INQUIRY: + case READ_CAPACITY: + if(!(adapter->flag & (1L << cmd->device->channel))) { + + dev_notice(&adapter->dev->dev, + "scsi%d: scanning scsi channel %d [P%d] " + "for physical devices\n", + adapter->host->host_no, + cmd->device->channel, channel); + + adapter->flag |= (1L << cmd->device->channel); + } + fallthrough; + default: + pthru->numsgelements = mega_build_sglist(adapter, scb, + &pthru->dataxferaddr, &pthru->dataxferlen); + break; + } + return pthru; +} + + +/** + * mega_prepare_extpassthru() + * @adapter: pointer to our soft state + * @scb: our scsi control block + * @cmd: scsi command from the mid-layer + * @channel: actual channel on the controller + * @target: actual id on the controller. + * + * prepare a command for the scsi physical devices. This rountine prepares + * commands for devices which can take extended CDBs (>10 bytes) + */ +static mega_ext_passthru * +mega_prepare_extpassthru(adapter_t *adapter, scb_t *scb, + struct scsi_cmnd *cmd, + int channel, int target) +{ + mega_ext_passthru *epthru; + + epthru = scb->epthru; + memset(epthru, 0, sizeof(mega_ext_passthru)); + + /* 0=6sec/1=60sec/2=10min/3=3hrs */ + epthru->timeout = 2; + + epthru->ars = 1; + epthru->reqsenselen = 14; + epthru->islogical = 0; + + epthru->channel = (adapter->flag & BOARD_40LD) ? 0 : channel; + epthru->target = (adapter->flag & BOARD_40LD) ? + (channel << 4) | target : target; + + epthru->cdblen = cmd->cmd_len; + epthru->logdrv = cmd->device->lun; + + memcpy(epthru->cdb, cmd->cmnd, cmd->cmd_len); + + /* Not sure about the direction */ + scb->dma_direction = DMA_BIDIRECTIONAL; + + switch(cmd->cmnd[0]) { + case INQUIRY: + case READ_CAPACITY: + if(!(adapter->flag & (1L << cmd->device->channel))) { + + dev_notice(&adapter->dev->dev, + "scsi%d: scanning scsi channel %d [P%d] " + "for physical devices\n", + adapter->host->host_no, + cmd->device->channel, channel); + + adapter->flag |= (1L << cmd->device->channel); + } + fallthrough; + default: + epthru->numsgelements = mega_build_sglist(adapter, scb, + &epthru->dataxferaddr, &epthru->dataxferlen); + break; + } + + return epthru; +} + +static void +__mega_runpendq(adapter_t *adapter) +{ + scb_t *scb; + struct list_head *pos, *next; + + /* Issue any pending commands to the card */ + list_for_each_safe(pos, next, &adapter->pending_list) { + + scb = list_entry(pos, scb_t, list); + + if( !(scb->state & SCB_ISSUED) ) { + + if( issue_scb(adapter, scb) != 0 ) + return; + } + } + + return; +} + + +/** + * issue_scb() + * @adapter: pointer to our soft state + * @scb: scsi control block + * + * Post a command to the card if the mailbox is available, otherwise return + * busy. We also take the scb from the pending list if the mailbox is + * available. + */ +static int +issue_scb(adapter_t *adapter, scb_t *scb) +{ + volatile mbox64_t *mbox64 = adapter->mbox64; + volatile mbox_t *mbox = adapter->mbox; + unsigned int i = 0; + + if(unlikely(mbox->m_in.busy)) { + do { + udelay(1); + i++; + } while( mbox->m_in.busy && (i < max_mbox_busy_wait) ); + + if(mbox->m_in.busy) return -1; + } + + /* Copy mailbox data into host structure */ + memcpy((char *)&mbox->m_out, (char *)scb->raw_mbox, + sizeof(struct mbox_out)); + + mbox->m_out.cmdid = scb->idx; /* Set cmdid */ + mbox->m_in.busy = 1; /* Set busy */ + + + /* + * Increment the pending queue counter + */ + atomic_inc(&adapter->pend_cmds); + + switch (mbox->m_out.cmd) { + case MEGA_MBOXCMD_LREAD64: + case MEGA_MBOXCMD_LWRITE64: + case MEGA_MBOXCMD_PASSTHRU64: + case MEGA_MBOXCMD_EXTPTHRU: + mbox64->xfer_segment_lo = mbox->m_out.xferaddr; + mbox64->xfer_segment_hi = 0; + mbox->m_out.xferaddr = 0xFFFFFFFF; + break; + default: + mbox64->xfer_segment_lo = 0; + mbox64->xfer_segment_hi = 0; + } + + /* + * post the command + */ + scb->state |= SCB_ISSUED; + + if( likely(adapter->flag & BOARD_MEMMAP) ) { + mbox->m_in.poll = 0; + mbox->m_in.ack = 0; + WRINDOOR(adapter, adapter->mbox_dma | 0x1); + } + else { + irq_enable(adapter); + issue_command(adapter); + } + + return 0; +} + +/* + * Wait until the controller's mailbox is available + */ +static inline int +mega_busywait_mbox (adapter_t *adapter) +{ + if (adapter->mbox->m_in.busy) + return __mega_busywait_mbox(adapter); + return 0; +} + +/** + * issue_scb_block() + * @adapter: pointer to our soft state + * @raw_mbox: the mailbox + * + * Issue a scb in synchronous and non-interrupt mode + */ +static int +issue_scb_block(adapter_t *adapter, u_char *raw_mbox) +{ + volatile mbox64_t *mbox64 = adapter->mbox64; + volatile mbox_t *mbox = adapter->mbox; + u8 byte; + + /* Wait until mailbox is free */ + if(mega_busywait_mbox (adapter)) + goto bug_blocked_mailbox; + + /* Copy mailbox data into host structure */ + memcpy((char *) mbox, raw_mbox, sizeof(struct mbox_out)); + mbox->m_out.cmdid = 0xFE; + mbox->m_in.busy = 1; + + switch (raw_mbox[0]) { + case MEGA_MBOXCMD_LREAD64: + case MEGA_MBOXCMD_LWRITE64: + case MEGA_MBOXCMD_PASSTHRU64: + case MEGA_MBOXCMD_EXTPTHRU: + mbox64->xfer_segment_lo = mbox->m_out.xferaddr; + mbox64->xfer_segment_hi = 0; + mbox->m_out.xferaddr = 0xFFFFFFFF; + break; + default: + mbox64->xfer_segment_lo = 0; + mbox64->xfer_segment_hi = 0; + } + + if( likely(adapter->flag & BOARD_MEMMAP) ) { + mbox->m_in.poll = 0; + mbox->m_in.ack = 0; + mbox->m_in.numstatus = 0xFF; + mbox->m_in.status = 0xFF; + WRINDOOR(adapter, adapter->mbox_dma | 0x1); + + while((volatile u8)mbox->m_in.numstatus == 0xFF) + cpu_relax(); + + mbox->m_in.numstatus = 0xFF; + + while( (volatile u8)mbox->m_in.poll != 0x77 ) + cpu_relax(); + + mbox->m_in.poll = 0; + mbox->m_in.ack = 0x77; + + WRINDOOR(adapter, adapter->mbox_dma | 0x2); + + while(RDINDOOR(adapter) & 0x2) + cpu_relax(); + } + else { + irq_disable(adapter); + issue_command(adapter); + + while (!((byte = irq_state(adapter)) & INTR_VALID)) + cpu_relax(); + + set_irq_state(adapter, byte); + irq_enable(adapter); + irq_ack(adapter); + } + + return mbox->m_in.status; + +bug_blocked_mailbox: + dev_warn(&adapter->dev->dev, "Blocked mailbox......!!\n"); + udelay (1000); + return -1; +} + + +/** + * megaraid_isr_iomapped() + * @irq: irq + * @devp: pointer to our soft state + * + * Interrupt service routine for io-mapped controllers. + * Find out if our device is interrupting. If yes, acknowledge the interrupt + * and service the completed commands. + */ +static irqreturn_t +megaraid_isr_iomapped(int irq, void *devp) +{ + adapter_t *adapter = devp; + unsigned long flags; + u8 status; + u8 nstatus; + u8 completed[MAX_FIRMWARE_STATUS]; + u8 byte; + int handled = 0; + + + /* + * loop till F/W has more commands for us to complete. + */ + spin_lock_irqsave(&adapter->lock, flags); + + do { + /* Check if a valid interrupt is pending */ + byte = irq_state(adapter); + if( (byte & VALID_INTR_BYTE) == 0 ) { + /* + * No more pending commands + */ + goto out_unlock; + } + set_irq_state(adapter, byte); + + while((nstatus = (volatile u8)adapter->mbox->m_in.numstatus) + == 0xFF) + cpu_relax(); + adapter->mbox->m_in.numstatus = 0xFF; + + status = adapter->mbox->m_in.status; + + /* + * decrement the pending queue counter + */ + atomic_sub(nstatus, &adapter->pend_cmds); + + memcpy(completed, (void *)adapter->mbox->m_in.completed, + nstatus); + + /* Acknowledge interrupt */ + irq_ack(adapter); + + mega_cmd_done(adapter, completed, nstatus, status); + + mega_rundoneq(adapter); + + handled = 1; + + /* Loop through any pending requests */ + if(atomic_read(&adapter->quiescent) == 0) { + mega_runpendq(adapter); + } + + } while(1); + + out_unlock: + + spin_unlock_irqrestore(&adapter->lock, flags); + + return IRQ_RETVAL(handled); +} + + +/** + * megaraid_isr_memmapped() + * @irq: irq + * @devp: pointer to our soft state + * + * Interrupt service routine for memory-mapped controllers. + * Find out if our device is interrupting. If yes, acknowledge the interrupt + * and service the completed commands. + */ +static irqreturn_t +megaraid_isr_memmapped(int irq, void *devp) +{ + adapter_t *adapter = devp; + unsigned long flags; + u8 status; + u32 dword = 0; + u8 nstatus; + u8 completed[MAX_FIRMWARE_STATUS]; + int handled = 0; + + + /* + * loop till F/W has more commands for us to complete. + */ + spin_lock_irqsave(&adapter->lock, flags); + + do { + /* Check if a valid interrupt is pending */ + dword = RDOUTDOOR(adapter); + if(dword != 0x10001234) { + /* + * No more pending commands + */ + goto out_unlock; + } + WROUTDOOR(adapter, 0x10001234); + + while((nstatus = (volatile u8)adapter->mbox->m_in.numstatus) + == 0xFF) { + cpu_relax(); + } + adapter->mbox->m_in.numstatus = 0xFF; + + status = adapter->mbox->m_in.status; + + /* + * decrement the pending queue counter + */ + atomic_sub(nstatus, &adapter->pend_cmds); + + memcpy(completed, (void *)adapter->mbox->m_in.completed, + nstatus); + + /* Acknowledge interrupt */ + WRINDOOR(adapter, 0x2); + + handled = 1; + + while( RDINDOOR(adapter) & 0x02 ) + cpu_relax(); + + mega_cmd_done(adapter, completed, nstatus, status); + + mega_rundoneq(adapter); + + /* Loop through any pending requests */ + if(atomic_read(&adapter->quiescent) == 0) { + mega_runpendq(adapter); + } + + } while(1); + + out_unlock: + + spin_unlock_irqrestore(&adapter->lock, flags); + + return IRQ_RETVAL(handled); +} +/** + * mega_cmd_done() + * @adapter: pointer to our soft state + * @completed: array of ids of completed commands + * @nstatus: number of completed commands + * @status: status of the last command completed + * + * Complete the commands and call the scsi mid-layer callback hooks. + */ +static void +mega_cmd_done(adapter_t *adapter, u8 completed[], int nstatus, int status) +{ + mega_ext_passthru *epthru = NULL; + struct scatterlist *sgl; + struct scsi_cmnd *cmd = NULL; + mega_passthru *pthru = NULL; + mbox_t *mbox = NULL; + u8 c; + scb_t *scb; + int islogical; + int cmdid; + int i; + + /* + * for all the commands completed, call the mid-layer callback routine + * and free the scb. + */ + for( i = 0; i < nstatus; i++ ) { + + cmdid = completed[i]; + + /* + * Only free SCBs for the commands coming down from the + * mid-layer, not for which were issued internally + * + * For internal command, restore the status returned by the + * firmware so that user can interpret it. + */ + if (cmdid == CMDID_INT_CMDS) { + scb = &adapter->int_scb; + cmd = scb->cmd; + + list_del_init(&scb->list); + scb->state = SCB_FREE; + + adapter->int_status = status; + complete(&adapter->int_waitq); + } else { + scb = &adapter->scb_list[cmdid]; + + /* + * Make sure f/w has completed a valid command + */ + if( !(scb->state & SCB_ISSUED) || scb->cmd == NULL ) { + dev_crit(&adapter->dev->dev, "invalid command " + "Id %d, scb->state:%x, scsi cmd:%p\n", + cmdid, scb->state, scb->cmd); + + continue; + } + + /* + * Was a abort issued for this command + */ + if( scb->state & SCB_ABORT ) { + + dev_warn(&adapter->dev->dev, + "aborted cmd [%x] complete\n", + scb->idx); + + scb->cmd->result = (DID_ABORT << 16); + + list_add_tail(SCSI_LIST(scb->cmd), + &adapter->completed_list); + + mega_free_scb(adapter, scb); + + continue; + } + + /* + * Was a reset issued for this command + */ + if( scb->state & SCB_RESET ) { + + dev_warn(&adapter->dev->dev, + "reset cmd [%x] complete\n", + scb->idx); + + scb->cmd->result = (DID_RESET << 16); + + list_add_tail(SCSI_LIST(scb->cmd), + &adapter->completed_list); + + mega_free_scb (adapter, scb); + + continue; + } + + cmd = scb->cmd; + pthru = scb->pthru; + epthru = scb->epthru; + mbox = (mbox_t *)scb->raw_mbox; + +#if MEGA_HAVE_STATS + { + + int logdrv = mbox->m_out.logdrv; + + islogical = adapter->logdrv_chan[cmd->channel]; + /* + * Maintain an error counter for the logical drive. + * Some application like SNMP agent need such + * statistics + */ + if( status && islogical && (cmd->cmnd[0] == READ_6 || + cmd->cmnd[0] == READ_10 || + cmd->cmnd[0] == READ_12)) { + /* + * Logical drive number increases by 0x80 when + * a logical drive is deleted + */ + adapter->rd_errors[logdrv%0x80]++; + } + + if( status && islogical && (cmd->cmnd[0] == WRITE_6 || + cmd->cmnd[0] == WRITE_10 || + cmd->cmnd[0] == WRITE_12)) { + /* + * Logical drive number increases by 0x80 when + * a logical drive is deleted + */ + adapter->wr_errors[logdrv%0x80]++; + } + + } +#endif + } + + /* + * Do not return the presence of hard disk on the channel so, + * inquiry sent, and returned data==hard disk or removable + * hard disk and not logical, request should return failure! - + * PJ + */ + islogical = adapter->logdrv_chan[cmd->device->channel]; + if( cmd->cmnd[0] == INQUIRY && !islogical ) { + + sgl = scsi_sglist(cmd); + if( sg_page(sgl) ) { + c = *(unsigned char *) sg_virt(&sgl[0]); + } else { + dev_warn(&adapter->dev->dev, "invalid sg\n"); + c = 0; + } + + if(IS_RAID_CH(adapter, cmd->device->channel) && + ((c & 0x1F ) == TYPE_DISK)) { + status = 0xF0; + } + } + + /* clear result; otherwise, success returns corrupt value */ + cmd->result = 0; + + /* Convert MegaRAID status to Linux error code */ + switch (status) { + case 0x00: /* SUCCESS , i.e. SCSI_STATUS_GOOD */ + cmd->result |= (DID_OK << 16); + break; + + case 0x02: /* ERROR_ABORTED, i.e. + SCSI_STATUS_CHECK_CONDITION */ + + /* set sense_buffer and result fields */ + if( mbox->m_out.cmd == MEGA_MBOXCMD_PASSTHRU || + mbox->m_out.cmd == MEGA_MBOXCMD_PASSTHRU64 ) { + + memcpy(cmd->sense_buffer, pthru->reqsensearea, + 14); + + cmd->result = SAM_STAT_CHECK_CONDITION; + } + else { + if (mbox->m_out.cmd == MEGA_MBOXCMD_EXTPTHRU) { + + memcpy(cmd->sense_buffer, + epthru->reqsensearea, 14); + + cmd->result = SAM_STAT_CHECK_CONDITION; + } else + scsi_build_sense(cmd, 0, + ABORTED_COMMAND, 0, 0); + } + break; + + case 0x08: /* ERR_DEST_DRIVE_FAILED, i.e. + SCSI_STATUS_BUSY */ + cmd->result |= (DID_BUS_BUSY << 16) | status; + break; + + default: +#if MEGA_HAVE_CLUSTERING + /* + * If TEST_UNIT_READY fails, we know + * MEGA_RESERVATION_STATUS failed + */ + if( cmd->cmnd[0] == TEST_UNIT_READY ) { + cmd->result |= (DID_ERROR << 16) | + SAM_STAT_RESERVATION_CONFLICT; + } + else + /* + * Error code returned is 1 if Reserve or Release + * failed or the input parameter is invalid + */ + if( status == 1 && + (cmd->cmnd[0] == RESERVE || + cmd->cmnd[0] == RELEASE) ) { + + cmd->result |= (DID_ERROR << 16) | + SAM_STAT_RESERVATION_CONFLICT; + } + else +#endif + cmd->result |= (DID_BAD_TARGET << 16)|status; + } + + mega_free_scb(adapter, scb); + + /* Add Scsi_Command to end of completed queue */ + list_add_tail(SCSI_LIST(cmd), &adapter->completed_list); + } +} + + +/* + * mega_runpendq() + * + * Run through the list of completed requests and finish it + */ +static void +mega_rundoneq (adapter_t *adapter) +{ + struct megaraid_cmd_priv *cmd_priv; + + list_for_each_entry(cmd_priv, &adapter->completed_list, entry) + scsi_done(megaraid_to_scsi_cmd(cmd_priv)); + + INIT_LIST_HEAD(&adapter->completed_list); +} + + +/* + * Free a SCB structure + * Note: We assume the scsi commands associated with this scb is not free yet. + */ +static void +mega_free_scb(adapter_t *adapter, scb_t *scb) +{ + switch( scb->dma_type ) { + + case MEGA_DMA_TYPE_NONE: + break; + + case MEGA_SGLIST: + scsi_dma_unmap(scb->cmd); + break; + default: + break; + } + + /* + * Remove from the pending list + */ + list_del_init(&scb->list); + + /* Link the scb back into free list */ + scb->state = SCB_FREE; + scb->cmd = NULL; + + list_add(&scb->list, &adapter->free_list); +} + + +static int +__mega_busywait_mbox (adapter_t *adapter) +{ + volatile mbox_t *mbox = adapter->mbox; + long counter; + + for (counter = 0; counter < 10000; counter++) { + if (!mbox->m_in.busy) + return 0; + udelay(100); + cond_resched(); + } + return -1; /* give up after 1 second */ +} + +/* + * Copies data to SGLIST + * Note: For 64 bit cards, we need a minimum of one SG element for read/write + */ +static int +mega_build_sglist(adapter_t *adapter, scb_t *scb, u32 *buf, u32 *len) +{ + struct scatterlist *sg; + struct scsi_cmnd *cmd; + int sgcnt; + int idx; + + cmd = scb->cmd; + + /* + * Copy Scatter-Gather list info into controller structure. + * + * The number of sg elements returned must not exceed our limit + */ + sgcnt = scsi_dma_map(cmd); + + scb->dma_type = MEGA_SGLIST; + + BUG_ON(sgcnt > adapter->sglen || sgcnt < 0); + + *len = 0; + + if (scsi_sg_count(cmd) == 1 && !adapter->has_64bit_addr) { + sg = scsi_sglist(cmd); + scb->dma_h_bulkdata = sg_dma_address(sg); + *buf = (u32)scb->dma_h_bulkdata; + *len = sg_dma_len(sg); + return 0; + } + + scsi_for_each_sg(cmd, sg, sgcnt, idx) { + if (adapter->has_64bit_addr) { + scb->sgl64[idx].address = sg_dma_address(sg); + *len += scb->sgl64[idx].length = sg_dma_len(sg); + } else { + scb->sgl[idx].address = sg_dma_address(sg); + *len += scb->sgl[idx].length = sg_dma_len(sg); + } + } + + /* Reset pointer and length fields */ + *buf = scb->sgl_dma_addr; + + /* Return count of SG requests */ + return sgcnt; +} + + +/* + * mega_8_to_40ld() + * + * takes all info in AdapterInquiry structure and puts it into ProductInfo and + * Enquiry3 structures for later use + */ +static void +mega_8_to_40ld(mraid_inquiry *inquiry, mega_inquiry3 *enquiry3, + mega_product_info *product_info) +{ + int i; + + product_info->max_commands = inquiry->adapter_info.max_commands; + enquiry3->rebuild_rate = inquiry->adapter_info.rebuild_rate; + product_info->nchannels = inquiry->adapter_info.nchannels; + + for (i = 0; i < 4; i++) { + product_info->fw_version[i] = + inquiry->adapter_info.fw_version[i]; + + product_info->bios_version[i] = + inquiry->adapter_info.bios_version[i]; + } + enquiry3->cache_flush_interval = + inquiry->adapter_info.cache_flush_interval; + + product_info->dram_size = inquiry->adapter_info.dram_size; + + enquiry3->num_ldrv = inquiry->logdrv_info.num_ldrv; + + for (i = 0; i < MAX_LOGICAL_DRIVES_8LD; i++) { + enquiry3->ldrv_size[i] = inquiry->logdrv_info.ldrv_size[i]; + enquiry3->ldrv_prop[i] = inquiry->logdrv_info.ldrv_prop[i]; + enquiry3->ldrv_state[i] = inquiry->logdrv_info.ldrv_state[i]; + } + + for (i = 0; i < (MAX_PHYSICAL_DRIVES); i++) + enquiry3->pdrv_state[i] = inquiry->pdrv_info.pdrv_state[i]; +} + +static inline void +mega_free_sgl(adapter_t *adapter) +{ + scb_t *scb; + int i; + + for(i = 0; i < adapter->max_cmds; i++) { + + scb = &adapter->scb_list[i]; + + if( scb->sgl64 ) { + dma_free_coherent(&adapter->dev->dev, + sizeof(mega_sgl64) * adapter->sglen, + scb->sgl64, scb->sgl_dma_addr); + + scb->sgl64 = NULL; + } + + if( scb->pthru ) { + dma_free_coherent(&adapter->dev->dev, + sizeof(mega_passthru), scb->pthru, + scb->pthru_dma_addr); + + scb->pthru = NULL; + } + + if( scb->epthru ) { + dma_free_coherent(&adapter->dev->dev, + sizeof(mega_ext_passthru), + scb->epthru, scb->epthru_dma_addr); + + scb->epthru = NULL; + } + + } +} + + +/* + * Get information about the card/driver + */ +const char * +megaraid_info(struct Scsi_Host *host) +{ + static char buffer[512]; + adapter_t *adapter; + + adapter = (adapter_t *)host->hostdata; + + sprintf (buffer, + "LSI Logic MegaRAID %s %d commands %d targs %d chans %d luns", + adapter->fw_version, adapter->product_info.max_commands, + adapter->host->max_id, adapter->host->max_channel, + (u32)adapter->host->max_lun); + return buffer; +} + +/* + * Abort a previous SCSI request. Only commands on the pending list can be + * aborted. All the commands issued to the F/W must complete. + */ +static int +megaraid_abort(struct scsi_cmnd *cmd) +{ + adapter_t *adapter; + int rval; + + adapter = (adapter_t *)cmd->device->host->hostdata; + + rval = megaraid_abort_and_reset(adapter, cmd, SCB_ABORT); + + /* + * This is required here to complete any completed requests + * to be communicated over to the mid layer. + */ + mega_rundoneq(adapter); + + return rval; +} + + +static int +megaraid_reset(struct scsi_cmnd *cmd) +{ + adapter_t *adapter; + megacmd_t mc; + int rval; + + adapter = (adapter_t *)cmd->device->host->hostdata; + +#if MEGA_HAVE_CLUSTERING + mc.cmd = MEGA_CLUSTER_CMD; + mc.opcode = MEGA_RESET_RESERVATIONS; + + if( mega_internal_command(adapter, &mc, NULL) != 0 ) { + dev_warn(&adapter->dev->dev, "reservation reset failed\n"); + } + else { + dev_info(&adapter->dev->dev, "reservation reset\n"); + } +#endif + + spin_lock_irq(&adapter->lock); + + rval = megaraid_abort_and_reset(adapter, cmd, SCB_RESET); + + /* + * This is required here to complete any completed requests + * to be communicated over to the mid layer. + */ + mega_rundoneq(adapter); + spin_unlock_irq(&adapter->lock); + + return rval; +} + +/** + * megaraid_abort_and_reset() + * @adapter: megaraid soft state + * @cmd: scsi command to be aborted or reset + * @aor: abort or reset flag + * + * Try to locate the scsi command in the pending queue. If found and is not + * issued to the controller, abort/reset it. Otherwise return failure + */ +static int +megaraid_abort_and_reset(adapter_t *adapter, struct scsi_cmnd *cmd, int aor) +{ + struct list_head *pos, *next; + scb_t *scb; + + dev_warn(&adapter->dev->dev, "%s cmd=%x <c=%d t=%d l=%d>\n", + (aor == SCB_ABORT)? "ABORTING":"RESET", + cmd->cmnd[0], cmd->device->channel, + cmd->device->id, (u32)cmd->device->lun); + + if(list_empty(&adapter->pending_list)) + return FAILED; + + list_for_each_safe(pos, next, &adapter->pending_list) { + + scb = list_entry(pos, scb_t, list); + + if (scb->cmd == cmd) { /* Found command */ + + scb->state |= aor; + + /* + * Check if this command has firmware ownership. If + * yes, we cannot reset this command. Whenever f/w + * completes this command, we will return appropriate + * status from ISR. + */ + if( scb->state & SCB_ISSUED ) { + + dev_warn(&adapter->dev->dev, + "%s[%x], fw owner\n", + (aor==SCB_ABORT) ? "ABORTING":"RESET", + scb->idx); + + return FAILED; + } + else { + + /* + * Not yet issued! Remove from the pending + * list + */ + dev_warn(&adapter->dev->dev, + "%s-[%x], driver owner\n", + (aor==SCB_ABORT) ? "ABORTING":"RESET", + scb->idx); + + mega_free_scb(adapter, scb); + + if( aor == SCB_ABORT ) { + cmd->result = (DID_ABORT << 16); + } + else { + cmd->result = (DID_RESET << 16); + } + + list_add_tail(SCSI_LIST(cmd), + &adapter->completed_list); + + return SUCCESS; + } + } + } + + return FAILED; +} + +static inline int +make_local_pdev(adapter_t *adapter, struct pci_dev **pdev) +{ + *pdev = pci_alloc_dev(NULL); + + if( *pdev == NULL ) return -1; + + memcpy(*pdev, adapter->dev, sizeof(struct pci_dev)); + + if (dma_set_mask(&(*pdev)->dev, DMA_BIT_MASK(32)) != 0) { + kfree(*pdev); + return -1; + } + + return 0; +} + +static inline void +free_local_pdev(struct pci_dev *pdev) +{ + kfree(pdev); +} + +/** + * mega_allocate_inquiry() + * @dma_handle: handle returned for dma address + * @pdev: handle to pci device + * + * allocates memory for inquiry structure + */ +static inline void * +mega_allocate_inquiry(dma_addr_t *dma_handle, struct pci_dev *pdev) +{ + return dma_alloc_coherent(&pdev->dev, sizeof(mega_inquiry3), + dma_handle, GFP_KERNEL); +} + + +static inline void +mega_free_inquiry(void *inquiry, dma_addr_t dma_handle, struct pci_dev *pdev) +{ + dma_free_coherent(&pdev->dev, sizeof(mega_inquiry3), inquiry, + dma_handle); +} + + +#ifdef CONFIG_PROC_FS +/* Following code handles /proc fs */ + +/** + * proc_show_config() + * @m: Synthetic file construction data + * @v: File iterator + * + * Display configuration information about the controller. + */ +static int +proc_show_config(struct seq_file *m, void *v) +{ + + adapter_t *adapter = m->private; + + seq_puts(m, MEGARAID_VERSION); + if(adapter->product_info.product_name[0]) + seq_printf(m, "%s\n", adapter->product_info.product_name); + + seq_puts(m, "Controller Type: "); + + if( adapter->flag & BOARD_MEMMAP ) + seq_puts(m, "438/466/467/471/493/518/520/531/532\n"); + else + seq_puts(m, "418/428/434\n"); + + if(adapter->flag & BOARD_40LD) + seq_puts(m, "Controller Supports 40 Logical Drives\n"); + + if(adapter->flag & BOARD_64BIT) + seq_puts(m, "Controller capable of 64-bit memory addressing\n"); + if( adapter->has_64bit_addr ) + seq_puts(m, "Controller using 64-bit memory addressing\n"); + else + seq_puts(m, "Controller is not using 64-bit memory addressing\n"); + + seq_printf(m, "Base = %08lx, Irq = %d, ", + adapter->base, adapter->host->irq); + + seq_printf(m, "Logical Drives = %d, Channels = %d\n", + adapter->numldrv, adapter->product_info.nchannels); + + seq_printf(m, "Version =%s:%s, DRAM = %dMb\n", + adapter->fw_version, adapter->bios_version, + adapter->product_info.dram_size); + + seq_printf(m, "Controller Queue Depth = %d, Driver Queue Depth = %d\n", + adapter->product_info.max_commands, adapter->max_cmds); + + seq_printf(m, "support_ext_cdb = %d\n", adapter->support_ext_cdb); + seq_printf(m, "support_random_del = %d\n", adapter->support_random_del); + seq_printf(m, "boot_ldrv_enabled = %d\n", adapter->boot_ldrv_enabled); + seq_printf(m, "boot_ldrv = %d\n", adapter->boot_ldrv); + seq_printf(m, "boot_pdrv_enabled = %d\n", adapter->boot_pdrv_enabled); + seq_printf(m, "boot_pdrv_ch = %d\n", adapter->boot_pdrv_ch); + seq_printf(m, "boot_pdrv_tgt = %d\n", adapter->boot_pdrv_tgt); + seq_printf(m, "quiescent = %d\n", + atomic_read(&adapter->quiescent)); + seq_printf(m, "has_cluster = %d\n", adapter->has_cluster); + + seq_puts(m, "\nModule Parameters:\n"); + seq_printf(m, "max_cmd_per_lun = %d\n", max_cmd_per_lun); + seq_printf(m, "max_sectors_per_io = %d\n", max_sectors_per_io); + return 0; +} + +/** + * proc_show_stat() + * @m: Synthetic file construction data + * @v: File iterator + * + * Display statistical information about the I/O activity. + */ +static int +proc_show_stat(struct seq_file *m, void *v) +{ + adapter_t *adapter = m->private; +#if MEGA_HAVE_STATS + int i; +#endif + + seq_puts(m, "Statistical Information for this controller\n"); + seq_printf(m, "pend_cmds = %d\n", atomic_read(&adapter->pend_cmds)); +#if MEGA_HAVE_STATS + for(i = 0; i < adapter->numldrv; i++) { + seq_printf(m, "Logical Drive %d:\n", i); + seq_printf(m, "\tReads Issued = %lu, Writes Issued = %lu\n", + adapter->nreads[i], adapter->nwrites[i]); + seq_printf(m, "\tSectors Read = %lu, Sectors Written = %lu\n", + adapter->nreadblocks[i], adapter->nwriteblocks[i]); + seq_printf(m, "\tRead errors = %lu, Write errors = %lu\n\n", + adapter->rd_errors[i], adapter->wr_errors[i]); + } +#else + seq_puts(m, "IO and error counters not compiled in driver.\n"); +#endif + return 0; +} + + +/** + * proc_show_mbox() + * @m: Synthetic file construction data + * @v: File iterator + * + * Display mailbox information for the last command issued. This information + * is good for debugging. + */ +static int +proc_show_mbox(struct seq_file *m, void *v) +{ + adapter_t *adapter = m->private; + volatile mbox_t *mbox = adapter->mbox; + + seq_puts(m, "Contents of Mail Box Structure\n"); + seq_printf(m, " Fw Command = 0x%02x\n", mbox->m_out.cmd); + seq_printf(m, " Cmd Sequence = 0x%02x\n", mbox->m_out.cmdid); + seq_printf(m, " No of Sectors= %04d\n", mbox->m_out.numsectors); + seq_printf(m, " LBA = 0x%02x\n", mbox->m_out.lba); + seq_printf(m, " DTA = 0x%08x\n", mbox->m_out.xferaddr); + seq_printf(m, " Logical Drive= 0x%02x\n", mbox->m_out.logdrv); + seq_printf(m, " No of SG Elmt= 0x%02x\n", mbox->m_out.numsgelements); + seq_printf(m, " Busy = %01x\n", mbox->m_in.busy); + seq_printf(m, " Status = 0x%02x\n", mbox->m_in.status); + return 0; +} + + +/** + * proc_show_rebuild_rate() + * @m: Synthetic file construction data + * @v: File iterator + * + * Display current rebuild rate + */ +static int +proc_show_rebuild_rate(struct seq_file *m, void *v) +{ + adapter_t *adapter = m->private; + dma_addr_t dma_handle; + caddr_t inquiry; + struct pci_dev *pdev; + + if( make_local_pdev(adapter, &pdev) != 0 ) + return 0; + + if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL ) + goto free_pdev; + + if( mega_adapinq(adapter, dma_handle) != 0 ) { + seq_puts(m, "Adapter inquiry failed.\n"); + dev_warn(&adapter->dev->dev, "inquiry failed\n"); + goto free_inquiry; + } + + if( adapter->flag & BOARD_40LD ) + seq_printf(m, "Rebuild Rate: [%d%%]\n", + ((mega_inquiry3 *)inquiry)->rebuild_rate); + else + seq_printf(m, "Rebuild Rate: [%d%%]\n", + ((mraid_ext_inquiry *) + inquiry)->raid_inq.adapter_info.rebuild_rate); + +free_inquiry: + mega_free_inquiry(inquiry, dma_handle, pdev); +free_pdev: + free_local_pdev(pdev); + return 0; +} + + +/** + * proc_show_battery() + * @m: Synthetic file construction data + * @v: File iterator + * + * Display information about the battery module on the controller. + */ +static int +proc_show_battery(struct seq_file *m, void *v) +{ + adapter_t *adapter = m->private; + dma_addr_t dma_handle; + caddr_t inquiry; + struct pci_dev *pdev; + u8 battery_status; + + if( make_local_pdev(adapter, &pdev) != 0 ) + return 0; + + if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL ) + goto free_pdev; + + if( mega_adapinq(adapter, dma_handle) != 0 ) { + seq_puts(m, "Adapter inquiry failed.\n"); + dev_warn(&adapter->dev->dev, "inquiry failed\n"); + goto free_inquiry; + } + + if( adapter->flag & BOARD_40LD ) { + battery_status = ((mega_inquiry3 *)inquiry)->battery_status; + } + else { + battery_status = ((mraid_ext_inquiry *)inquiry)-> + raid_inq.adapter_info.battery_status; + } + + /* + * Decode the battery status + */ + seq_printf(m, "Battery Status:[%d]", battery_status); + + if(battery_status == MEGA_BATT_CHARGE_DONE) + seq_puts(m, " Charge Done"); + + if(battery_status & MEGA_BATT_MODULE_MISSING) + seq_puts(m, " Module Missing"); + + if(battery_status & MEGA_BATT_LOW_VOLTAGE) + seq_puts(m, " Low Voltage"); + + if(battery_status & MEGA_BATT_TEMP_HIGH) + seq_puts(m, " Temperature High"); + + if(battery_status & MEGA_BATT_PACK_MISSING) + seq_puts(m, " Pack Missing"); + + if(battery_status & MEGA_BATT_CHARGE_INPROG) + seq_puts(m, " Charge In-progress"); + + if(battery_status & MEGA_BATT_CHARGE_FAIL) + seq_puts(m, " Charge Fail"); + + if(battery_status & MEGA_BATT_CYCLES_EXCEEDED) + seq_puts(m, " Cycles Exceeded"); + + seq_putc(m, '\n'); + +free_inquiry: + mega_free_inquiry(inquiry, dma_handle, pdev); +free_pdev: + free_local_pdev(pdev); + return 0; +} + + +/* + * Display scsi inquiry + */ +static void +mega_print_inquiry(struct seq_file *m, char *scsi_inq) +{ + int i; + + seq_puts(m, " Vendor: "); + seq_write(m, scsi_inq + 8, 8); + seq_puts(m, " Model: "); + seq_write(m, scsi_inq + 16, 16); + seq_puts(m, " Rev: "); + seq_write(m, scsi_inq + 32, 4); + seq_putc(m, '\n'); + + i = scsi_inq[0] & 0x1f; + seq_printf(m, " Type: %s ", scsi_device_type(i)); + + seq_printf(m, " ANSI SCSI revision: %02x", + scsi_inq[2] & 0x07); + + if( (scsi_inq[2] & 0x07) == 1 && (scsi_inq[3] & 0x0f) == 1 ) + seq_puts(m, " CCS\n"); + else + seq_putc(m, '\n'); +} + +/** + * proc_show_pdrv() + * @m: Synthetic file construction data + * @adapter: pointer to our soft state + * @channel: channel + * + * Display information about the physical drives. + */ +static int +proc_show_pdrv(struct seq_file *m, adapter_t *adapter, int channel) +{ + dma_addr_t dma_handle; + char *scsi_inq; + dma_addr_t scsi_inq_dma_handle; + caddr_t inquiry; + struct pci_dev *pdev; + u8 *pdrv_state; + u8 state; + int tgt; + int max_channels; + int i; + + if( make_local_pdev(adapter, &pdev) != 0 ) + return 0; + + if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL ) + goto free_pdev; + + if( mega_adapinq(adapter, dma_handle) != 0 ) { + seq_puts(m, "Adapter inquiry failed.\n"); + dev_warn(&adapter->dev->dev, "inquiry failed\n"); + goto free_inquiry; + } + + + scsi_inq = dma_alloc_coherent(&pdev->dev, 256, &scsi_inq_dma_handle, + GFP_KERNEL); + if( scsi_inq == NULL ) { + seq_puts(m, "memory not available for scsi inq.\n"); + goto free_inquiry; + } + + if( adapter->flag & BOARD_40LD ) { + pdrv_state = ((mega_inquiry3 *)inquiry)->pdrv_state; + } + else { + pdrv_state = ((mraid_ext_inquiry *)inquiry)-> + raid_inq.pdrv_info.pdrv_state; + } + + max_channels = adapter->product_info.nchannels; + + if( channel >= max_channels ) { + goto free_pci; + } + + for( tgt = 0; tgt <= MAX_TARGET; tgt++ ) { + + i = channel*16 + tgt; + + state = *(pdrv_state + i); + switch( state & 0x0F ) { + case PDRV_ONLINE: + seq_printf(m, "Channel:%2d Id:%2d State: Online", + channel, tgt); + break; + + case PDRV_FAILED: + seq_printf(m, "Channel:%2d Id:%2d State: Failed", + channel, tgt); + break; + + case PDRV_RBLD: + seq_printf(m, "Channel:%2d Id:%2d State: Rebuild", + channel, tgt); + break; + + case PDRV_HOTSPARE: + seq_printf(m, "Channel:%2d Id:%2d State: Hot spare", + channel, tgt); + break; + + default: + seq_printf(m, "Channel:%2d Id:%2d State: Un-configured", + channel, tgt); + break; + } + + /* + * This interface displays inquiries for disk drives + * only. Inquries for logical drives and non-disk + * devices are available through /proc/scsi/scsi + */ + memset(scsi_inq, 0, 256); + if( mega_internal_dev_inquiry(adapter, channel, tgt, + scsi_inq_dma_handle) || + (scsi_inq[0] & 0x1F) != TYPE_DISK ) { + continue; + } + + /* + * Check for overflow. We print less than 240 + * characters for inquiry + */ + seq_puts(m, ".\n"); + mega_print_inquiry(m, scsi_inq); + } + +free_pci: + dma_free_coherent(&pdev->dev, 256, scsi_inq, scsi_inq_dma_handle); +free_inquiry: + mega_free_inquiry(inquiry, dma_handle, pdev); +free_pdev: + free_local_pdev(pdev); + return 0; +} + +/** + * proc_show_pdrv_ch0() + * @m: Synthetic file construction data + * @v: File iterator + * + * Display information about the physical drives on physical channel 0. + */ +static int +proc_show_pdrv_ch0(struct seq_file *m, void *v) +{ + return proc_show_pdrv(m, m->private, 0); +} + + +/** + * proc_show_pdrv_ch1() + * @m: Synthetic file construction data + * @v: File iterator + * + * Display information about the physical drives on physical channel 1. + */ +static int +proc_show_pdrv_ch1(struct seq_file *m, void *v) +{ + return proc_show_pdrv(m, m->private, 1); +} + + +/** + * proc_show_pdrv_ch2() + * @m: Synthetic file construction data + * @v: File iterator + * + * Display information about the physical drives on physical channel 2. + */ +static int +proc_show_pdrv_ch2(struct seq_file *m, void *v) +{ + return proc_show_pdrv(m, m->private, 2); +} + + +/** + * proc_show_pdrv_ch3() + * @m: Synthetic file construction data + * @v: File iterator + * + * Display information about the physical drives on physical channel 3. + */ +static int +proc_show_pdrv_ch3(struct seq_file *m, void *v) +{ + return proc_show_pdrv(m, m->private, 3); +} + + +/** + * proc_show_rdrv() + * @m: Synthetic file construction data + * @adapter: pointer to our soft state + * @start: starting logical drive to display + * @end: ending logical drive to display + * + * We do not print the inquiry information since its already available through + * /proc/scsi/scsi interface + */ +static int +proc_show_rdrv(struct seq_file *m, adapter_t *adapter, int start, int end ) +{ + dma_addr_t dma_handle; + logdrv_param *lparam; + megacmd_t mc; + char *disk_array; + dma_addr_t disk_array_dma_handle; + caddr_t inquiry; + struct pci_dev *pdev; + u8 *rdrv_state; + int num_ldrv; + u32 array_sz; + int i; + + if( make_local_pdev(adapter, &pdev) != 0 ) + return 0; + + if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL ) + goto free_pdev; + + if( mega_adapinq(adapter, dma_handle) != 0 ) { + seq_puts(m, "Adapter inquiry failed.\n"); + dev_warn(&adapter->dev->dev, "inquiry failed\n"); + goto free_inquiry; + } + + memset(&mc, 0, sizeof(megacmd_t)); + + if( adapter->flag & BOARD_40LD ) { + array_sz = sizeof(disk_array_40ld); + + rdrv_state = ((mega_inquiry3 *)inquiry)->ldrv_state; + + num_ldrv = ((mega_inquiry3 *)inquiry)->num_ldrv; + } + else { + array_sz = sizeof(disk_array_8ld); + + rdrv_state = ((mraid_ext_inquiry *)inquiry)-> + raid_inq.logdrv_info.ldrv_state; + + num_ldrv = ((mraid_ext_inquiry *)inquiry)-> + raid_inq.logdrv_info.num_ldrv; + } + + disk_array = dma_alloc_coherent(&pdev->dev, array_sz, + &disk_array_dma_handle, GFP_KERNEL); + + if( disk_array == NULL ) { + seq_puts(m, "memory not available.\n"); + goto free_inquiry; + } + + mc.xferaddr = (u32)disk_array_dma_handle; + + if( adapter->flag & BOARD_40LD ) { + mc.cmd = FC_NEW_CONFIG; + mc.opcode = OP_DCMD_READ_CONFIG; + + if( mega_internal_command(adapter, &mc, NULL) ) { + seq_puts(m, "40LD read config failed.\n"); + goto free_pci; + } + + } + else { + mc.cmd = NEW_READ_CONFIG_8LD; + + if( mega_internal_command(adapter, &mc, NULL) ) { + mc.cmd = READ_CONFIG_8LD; + if( mega_internal_command(adapter, &mc, NULL) ) { + seq_puts(m, "8LD read config failed.\n"); + goto free_pci; + } + } + } + + for( i = start; i < ( (end+1 < num_ldrv) ? end+1 : num_ldrv ); i++ ) { + + if( adapter->flag & BOARD_40LD ) { + lparam = + &((disk_array_40ld *)disk_array)->ldrv[i].lparam; + } + else { + lparam = + &((disk_array_8ld *)disk_array)->ldrv[i].lparam; + } + + /* + * Check for overflow. We print less than 240 characters for + * information about each logical drive. + */ + seq_printf(m, "Logical drive:%2d:, ", i); + + switch( rdrv_state[i] & 0x0F ) { + case RDRV_OFFLINE: + seq_puts(m, "state: offline"); + break; + case RDRV_DEGRADED: + seq_puts(m, "state: degraded"); + break; + case RDRV_OPTIMAL: + seq_puts(m, "state: optimal"); + break; + case RDRV_DELETED: + seq_puts(m, "state: deleted"); + break; + default: + seq_puts(m, "state: unknown"); + break; + } + + /* + * Check if check consistency or initialization is going on + * for this logical drive. + */ + if( (rdrv_state[i] & 0xF0) == 0x20 ) + seq_puts(m, ", check-consistency in progress"); + else if( (rdrv_state[i] & 0xF0) == 0x10 ) + seq_puts(m, ", initialization in progress"); + + seq_putc(m, '\n'); + + seq_printf(m, "Span depth:%3d, ", lparam->span_depth); + seq_printf(m, "RAID level:%3d, ", lparam->level); + seq_printf(m, "Stripe size:%3d, ", + lparam->stripe_sz ? lparam->stripe_sz/2: 128); + seq_printf(m, "Row size:%3d\n", lparam->row_size); + + seq_puts(m, "Read Policy: "); + switch(lparam->read_ahead) { + case NO_READ_AHEAD: + seq_puts(m, "No read ahead, "); + break; + case READ_AHEAD: + seq_puts(m, "Read ahead, "); + break; + case ADAP_READ_AHEAD: + seq_puts(m, "Adaptive, "); + break; + + } + + seq_puts(m, "Write Policy: "); + switch(lparam->write_mode) { + case WRMODE_WRITE_THRU: + seq_puts(m, "Write thru, "); + break; + case WRMODE_WRITE_BACK: + seq_puts(m, "Write back, "); + break; + } + + seq_puts(m, "Cache Policy: "); + switch(lparam->direct_io) { + case CACHED_IO: + seq_puts(m, "Cached IO\n\n"); + break; + case DIRECT_IO: + seq_puts(m, "Direct IO\n\n"); + break; + } + } + +free_pci: + dma_free_coherent(&pdev->dev, array_sz, disk_array, + disk_array_dma_handle); +free_inquiry: + mega_free_inquiry(inquiry, dma_handle, pdev); +free_pdev: + free_local_pdev(pdev); + return 0; +} + +/** + * proc_show_rdrv_10() + * @m: Synthetic file construction data + * @v: File iterator + * + * Display real time information about the logical drives 0 through 9. + */ +static int +proc_show_rdrv_10(struct seq_file *m, void *v) +{ + return proc_show_rdrv(m, m->private, 0, 9); +} + + +/** + * proc_show_rdrv_20() + * @m: Synthetic file construction data + * @v: File iterator + * + * Display real time information about the logical drives 0 through 9. + */ +static int +proc_show_rdrv_20(struct seq_file *m, void *v) +{ + return proc_show_rdrv(m, m->private, 10, 19); +} + + +/** + * proc_show_rdrv_30() + * @m: Synthetic file construction data + * @v: File iterator + * + * Display real time information about the logical drives 0 through 9. + */ +static int +proc_show_rdrv_30(struct seq_file *m, void *v) +{ + return proc_show_rdrv(m, m->private, 20, 29); +} + + +/** + * proc_show_rdrv_40() + * @m: Synthetic file construction data + * @v: File iterator + * + * Display real time information about the logical drives 0 through 9. + */ +static int +proc_show_rdrv_40(struct seq_file *m, void *v) +{ + return proc_show_rdrv(m, m->private, 30, 39); +} + +/** + * mega_create_proc_entry() + * @index: index in soft state array + * @parent: parent node for this /proc entry + * + * Creates /proc entries for our controllers. + */ +static void +mega_create_proc_entry(int index, struct proc_dir_entry *parent) +{ + adapter_t *adapter = hba_soft_state[index]; + struct proc_dir_entry *dir; + u8 string[16]; + + sprintf(string, "hba%d", adapter->host->host_no); + dir = proc_mkdir_data(string, 0, parent, adapter); + if (!dir) { + dev_warn(&adapter->dev->dev, "proc_mkdir failed\n"); + return; + } + + proc_create_single_data("config", S_IRUSR, dir, + proc_show_config, adapter); + proc_create_single_data("stat", S_IRUSR, dir, + proc_show_stat, adapter); + proc_create_single_data("mailbox", S_IRUSR, dir, + proc_show_mbox, adapter); +#if MEGA_HAVE_ENH_PROC + proc_create_single_data("rebuild-rate", S_IRUSR, dir, + proc_show_rebuild_rate, adapter); + proc_create_single_data("battery-status", S_IRUSR, dir, + proc_show_battery, adapter); + proc_create_single_data("diskdrives-ch0", S_IRUSR, dir, + proc_show_pdrv_ch0, adapter); + proc_create_single_data("diskdrives-ch1", S_IRUSR, dir, + proc_show_pdrv_ch1, adapter); + proc_create_single_data("diskdrives-ch2", S_IRUSR, dir, + proc_show_pdrv_ch2, adapter); + proc_create_single_data("diskdrives-ch3", S_IRUSR, dir, + proc_show_pdrv_ch3, adapter); + proc_create_single_data("raiddrives-0-9", S_IRUSR, dir, + proc_show_rdrv_10, adapter); + proc_create_single_data("raiddrives-10-19", S_IRUSR, dir, + proc_show_rdrv_20, adapter); + proc_create_single_data("raiddrives-20-29", S_IRUSR, dir, + proc_show_rdrv_30, adapter); + proc_create_single_data("raiddrives-30-39", S_IRUSR, dir, + proc_show_rdrv_40, adapter); +#endif +} + +#else +static inline void mega_create_proc_entry(int index, struct proc_dir_entry *parent) +{ +} +#endif + + +/* + * megaraid_biosparam() + * + * Return the disk geometry for a particular disk + */ +static int +megaraid_biosparam(struct scsi_device *sdev, struct block_device *bdev, + sector_t capacity, int geom[]) +{ + adapter_t *adapter; + int heads; + int sectors; + int cylinders; + + /* Get pointer to host config structure */ + adapter = (adapter_t *)sdev->host->hostdata; + + if (IS_RAID_CH(adapter, sdev->channel)) { + /* Default heads (64) & sectors (32) */ + heads = 64; + sectors = 32; + cylinders = (ulong)capacity / (heads * sectors); + + /* + * Handle extended translation size for logical drives + * > 1Gb + */ + if ((ulong)capacity >= 0x200000) { + heads = 255; + sectors = 63; + cylinders = (ulong)capacity / (heads * sectors); + } + + /* return result */ + geom[0] = heads; + geom[1] = sectors; + geom[2] = cylinders; + } + else { + if (scsi_partsize(bdev, capacity, geom)) + return 0; + + dev_info(&adapter->dev->dev, + "invalid partition on this disk on channel %d\n", + sdev->channel); + + /* Default heads (64) & sectors (32) */ + heads = 64; + sectors = 32; + cylinders = (ulong)capacity / (heads * sectors); + + /* Handle extended translation size for logical drives > 1Gb */ + if ((ulong)capacity >= 0x200000) { + heads = 255; + sectors = 63; + cylinders = (ulong)capacity / (heads * sectors); + } + + /* return result */ + geom[0] = heads; + geom[1] = sectors; + geom[2] = cylinders; + } + + return 0; +} + +/** + * mega_init_scb() + * @adapter: pointer to our soft state + * + * Allocate memory for the various pointers in the scb structures: + * scatter-gather list pointer, passthru and extended passthru structure + * pointers. + */ +static int +mega_init_scb(adapter_t *adapter) +{ + scb_t *scb; + int i; + + for( i = 0; i < adapter->max_cmds; i++ ) { + + scb = &adapter->scb_list[i]; + + scb->sgl64 = NULL; + scb->sgl = NULL; + scb->pthru = NULL; + scb->epthru = NULL; + } + + for( i = 0; i < adapter->max_cmds; i++ ) { + + scb = &adapter->scb_list[i]; + + scb->idx = i; + + scb->sgl64 = dma_alloc_coherent(&adapter->dev->dev, + sizeof(mega_sgl64) * adapter->sglen, + &scb->sgl_dma_addr, GFP_KERNEL); + + scb->sgl = (mega_sglist *)scb->sgl64; + + if( !scb->sgl ) { + dev_warn(&adapter->dev->dev, "RAID: Can't allocate sglist\n"); + mega_free_sgl(adapter); + return -1; + } + + scb->pthru = dma_alloc_coherent(&adapter->dev->dev, + sizeof(mega_passthru), + &scb->pthru_dma_addr, GFP_KERNEL); + + if( !scb->pthru ) { + dev_warn(&adapter->dev->dev, "RAID: Can't allocate passthru\n"); + mega_free_sgl(adapter); + return -1; + } + + scb->epthru = dma_alloc_coherent(&adapter->dev->dev, + sizeof(mega_ext_passthru), + &scb->epthru_dma_addr, GFP_KERNEL); + + if( !scb->epthru ) { + dev_warn(&adapter->dev->dev, + "Can't allocate extended passthru\n"); + mega_free_sgl(adapter); + return -1; + } + + + scb->dma_type = MEGA_DMA_TYPE_NONE; + + /* + * Link to free list + * lock not required since we are loading the driver, so no + * commands possible right now. + */ + scb->state = SCB_FREE; + scb->cmd = NULL; + list_add(&scb->list, &adapter->free_list); + } + + return 0; +} + + +/** + * megadev_open() + * @inode: unused + * @filep: unused + * + * Routines for the character/ioctl interface to the driver. Find out if this + * is a valid open. + */ +static int +megadev_open (struct inode *inode, struct file *filep) +{ + /* + * Only allow superuser to access private ioctl interface + */ + if( !capable(CAP_SYS_ADMIN) ) return -EACCES; + + return 0; +} + + +/** + * megadev_ioctl() + * @filep: Our device file + * @cmd: ioctl command + * @arg: user buffer + * + * ioctl entry point for our private ioctl interface. We move the data in from + * the user space, prepare the command (if necessary, convert the old MIMD + * ioctl to new ioctl command), and issue a synchronous command to the + * controller. + */ +static int +megadev_ioctl(struct file *filep, unsigned int cmd, unsigned long arg) +{ + adapter_t *adapter; + nitioctl_t uioc; + int adapno; + int rval; + mega_passthru __user *upthru; /* user address for passthru */ + mega_passthru *pthru; /* copy user passthru here */ + dma_addr_t pthru_dma_hndl; + void *data = NULL; /* data to be transferred */ + dma_addr_t data_dma_hndl; /* dma handle for data xfer area */ + megacmd_t mc; +#if MEGA_HAVE_STATS + megastat_t __user *ustats = NULL; + int num_ldrv = 0; +#endif + u32 uxferaddr = 0; + struct pci_dev *pdev; + + /* + * Make sure only USCSICMD are issued through this interface. + * MIMD application would still fire different command. + */ + if( (_IOC_TYPE(cmd) != MEGAIOC_MAGIC) && (cmd != USCSICMD) ) { + return -EINVAL; + } + + /* + * Check and convert a possible MIMD command to NIT command. + * mega_m_to_n() copies the data from the user space, so we do not + * have to do it here. + * NOTE: We will need some user address to copyout the data, therefore + * the inteface layer will also provide us with the required user + * addresses. + */ + memset(&uioc, 0, sizeof(nitioctl_t)); + if( (rval = mega_m_to_n( (void __user *)arg, &uioc)) != 0 ) + return rval; + + + switch( uioc.opcode ) { + + case GET_DRIVER_VER: + if( put_user(driver_ver, (u32 __user *)uioc.uioc_uaddr) ) + return (-EFAULT); + + break; + + case GET_N_ADAP: + if( put_user(hba_count, (u32 __user *)uioc.uioc_uaddr) ) + return (-EFAULT); + + /* + * Shucks. MIMD interface returns a positive value for number + * of adapters. TODO: Change it to return 0 when there is no + * applicatio using mimd interface. + */ + return hba_count; + + case GET_ADAP_INFO: + + /* + * Which adapter + */ + if( (adapno = GETADAP(uioc.adapno)) >= hba_count ) + return (-ENODEV); + + if( copy_to_user(uioc.uioc_uaddr, mcontroller+adapno, + sizeof(struct mcontroller)) ) + return (-EFAULT); + break; + +#if MEGA_HAVE_STATS + + case GET_STATS: + /* + * Which adapter + */ + if( (adapno = GETADAP(uioc.adapno)) >= hba_count ) + return (-ENODEV); + + adapter = hba_soft_state[adapno]; + + ustats = uioc.uioc_uaddr; + + if( copy_from_user(&num_ldrv, &ustats->num_ldrv, sizeof(int)) ) + return (-EFAULT); + + /* + * Check for the validity of the logical drive number + */ + if( num_ldrv >= MAX_LOGICAL_DRIVES_40LD ) return -EINVAL; + + if( copy_to_user(ustats->nreads, adapter->nreads, + num_ldrv*sizeof(u32)) ) + return -EFAULT; + + if( copy_to_user(ustats->nreadblocks, adapter->nreadblocks, + num_ldrv*sizeof(u32)) ) + return -EFAULT; + + if( copy_to_user(ustats->nwrites, adapter->nwrites, + num_ldrv*sizeof(u32)) ) + return -EFAULT; + + if( copy_to_user(ustats->nwriteblocks, adapter->nwriteblocks, + num_ldrv*sizeof(u32)) ) + return -EFAULT; + + if( copy_to_user(ustats->rd_errors, adapter->rd_errors, + num_ldrv*sizeof(u32)) ) + return -EFAULT; + + if( copy_to_user(ustats->wr_errors, adapter->wr_errors, + num_ldrv*sizeof(u32)) ) + return -EFAULT; + + return 0; + +#endif + case MBOX_CMD: + + /* + * Which adapter + */ + if( (adapno = GETADAP(uioc.adapno)) >= hba_count ) + return (-ENODEV); + + adapter = hba_soft_state[adapno]; + + /* + * Deletion of logical drive is a special case. The adapter + * should be quiescent before this command is issued. + */ + if( uioc.uioc_rmbox[0] == FC_DEL_LOGDRV && + uioc.uioc_rmbox[2] == OP_DEL_LOGDRV ) { + + /* + * Do we support this feature + */ + if( !adapter->support_random_del ) { + dev_warn(&adapter->dev->dev, "logdrv " + "delete on non-supporting F/W\n"); + + return (-EINVAL); + } + + rval = mega_del_logdrv( adapter, uioc.uioc_rmbox[3] ); + + if( rval == 0 ) { + memset(&mc, 0, sizeof(megacmd_t)); + + mc.status = rval; + + rval = mega_n_to_m((void __user *)arg, &mc); + } + + return rval; + } + /* + * This interface only support the regular passthru commands. + * Reject extended passthru and 64-bit passthru + */ + if( uioc.uioc_rmbox[0] == MEGA_MBOXCMD_PASSTHRU64 || + uioc.uioc_rmbox[0] == MEGA_MBOXCMD_EXTPTHRU ) { + + dev_warn(&adapter->dev->dev, "rejected passthru\n"); + + return (-EINVAL); + } + + /* + * For all internal commands, the buffer must be allocated in + * <4GB address range + */ + if( make_local_pdev(adapter, &pdev) != 0 ) + return -EIO; + + /* Is it a passthru command or a DCMD */ + if( uioc.uioc_rmbox[0] == MEGA_MBOXCMD_PASSTHRU ) { + /* Passthru commands */ + + pthru = dma_alloc_coherent(&pdev->dev, + sizeof(mega_passthru), + &pthru_dma_hndl, GFP_KERNEL); + + if( pthru == NULL ) { + free_local_pdev(pdev); + return (-ENOMEM); + } + + /* + * The user passthru structure + */ + upthru = (mega_passthru __user *)(unsigned long)MBOX(uioc)->xferaddr; + + /* + * Copy in the user passthru here. + */ + if( copy_from_user(pthru, upthru, + sizeof(mega_passthru)) ) { + + dma_free_coherent(&pdev->dev, + sizeof(mega_passthru), + pthru, pthru_dma_hndl); + + free_local_pdev(pdev); + + return (-EFAULT); + } + + /* + * Is there a data transfer + */ + if( pthru->dataxferlen ) { + data = dma_alloc_coherent(&pdev->dev, + pthru->dataxferlen, + &data_dma_hndl, + GFP_KERNEL); + + if( data == NULL ) { + dma_free_coherent(&pdev->dev, + sizeof(mega_passthru), + pthru, + pthru_dma_hndl); + + free_local_pdev(pdev); + + return (-ENOMEM); + } + + /* + * Save the user address and point the kernel + * address at just allocated memory + */ + uxferaddr = pthru->dataxferaddr; + pthru->dataxferaddr = data_dma_hndl; + } + + + /* + * Is data coming down-stream + */ + if( pthru->dataxferlen && (uioc.flags & UIOC_WR) ) { + /* + * Get the user data + */ + if( copy_from_user(data, (char __user *)(unsigned long) uxferaddr, + pthru->dataxferlen) ) { + rval = (-EFAULT); + goto freemem_and_return; + } + } + + memset(&mc, 0, sizeof(megacmd_t)); + + mc.cmd = MEGA_MBOXCMD_PASSTHRU; + mc.xferaddr = (u32)pthru_dma_hndl; + + /* + * Issue the command + */ + mega_internal_command(adapter, &mc, pthru); + + rval = mega_n_to_m((void __user *)arg, &mc); + + if( rval ) goto freemem_and_return; + + + /* + * Is data going up-stream + */ + if( pthru->dataxferlen && (uioc.flags & UIOC_RD) ) { + if( copy_to_user((char __user *)(unsigned long) uxferaddr, data, + pthru->dataxferlen) ) { + rval = (-EFAULT); + } + } + + /* + * Send the request sense data also, irrespective of + * whether the user has asked for it or not. + */ + if (copy_to_user(upthru->reqsensearea, + pthru->reqsensearea, 14)) + rval = -EFAULT; + +freemem_and_return: + if( pthru->dataxferlen ) { + dma_free_coherent(&pdev->dev, + pthru->dataxferlen, data, + data_dma_hndl); + } + + dma_free_coherent(&pdev->dev, sizeof(mega_passthru), + pthru, pthru_dma_hndl); + + free_local_pdev(pdev); + + return rval; + } + else { + /* DCMD commands */ + + /* + * Is there a data transfer + */ + if( uioc.xferlen ) { + data = dma_alloc_coherent(&pdev->dev, + uioc.xferlen, + &data_dma_hndl, + GFP_KERNEL); + + if( data == NULL ) { + free_local_pdev(pdev); + return (-ENOMEM); + } + + uxferaddr = MBOX(uioc)->xferaddr; + } + + /* + * Is data coming down-stream + */ + if( uioc.xferlen && (uioc.flags & UIOC_WR) ) { + /* + * Get the user data + */ + if( copy_from_user(data, (char __user *)(unsigned long) uxferaddr, + uioc.xferlen) ) { + + dma_free_coherent(&pdev->dev, + uioc.xferlen, data, + data_dma_hndl); + + free_local_pdev(pdev); + + return (-EFAULT); + } + } + + memcpy(&mc, MBOX(uioc), sizeof(megacmd_t)); + + mc.xferaddr = (u32)data_dma_hndl; + + /* + * Issue the command + */ + mega_internal_command(adapter, &mc, NULL); + + rval = mega_n_to_m((void __user *)arg, &mc); + + if( rval ) { + if( uioc.xferlen ) { + dma_free_coherent(&pdev->dev, + uioc.xferlen, data, + data_dma_hndl); + } + + free_local_pdev(pdev); + + return rval; + } + + /* + * Is data going up-stream + */ + if( uioc.xferlen && (uioc.flags & UIOC_RD) ) { + if( copy_to_user((char __user *)(unsigned long) uxferaddr, data, + uioc.xferlen) ) { + + rval = (-EFAULT); + } + } + + if( uioc.xferlen ) { + dma_free_coherent(&pdev->dev, uioc.xferlen, + data, data_dma_hndl); + } + + free_local_pdev(pdev); + + return rval; + } + + default: + return (-EINVAL); + } + + return 0; +} + +static long +megadev_unlocked_ioctl(struct file *filep, unsigned int cmd, unsigned long arg) +{ + int ret; + + mutex_lock(&megadev_mutex); + ret = megadev_ioctl(filep, cmd, arg); + mutex_unlock(&megadev_mutex); + + return ret; +} + +/** + * mega_m_to_n() + * @arg: user address + * @uioc: new ioctl structure + * + * A thin layer to convert older mimd interface ioctl structure to NIT ioctl + * structure + * + * Converts the older mimd ioctl structure to newer NIT structure + */ +static int +mega_m_to_n(void __user *arg, nitioctl_t *uioc) +{ + struct uioctl_t uioc_mimd; + char signature[8] = {0}; + u8 opcode; + u8 subopcode; + + + /* + * check is the application conforms to NIT. We do not have to do much + * in that case. + * We exploit the fact that the signature is stored in the very + * beginning of the structure. + */ + + if( copy_from_user(signature, arg, 7) ) + return (-EFAULT); + + if( memcmp(signature, "MEGANIT", 7) == 0 ) { + + /* + * NOTE NOTE: The nit ioctl is still under flux because of + * change of mailbox definition, in HPE. No applications yet + * use this interface and let's not have applications use this + * interface till the new specifitions are in place. + */ + return -EINVAL; +#if 0 + if( copy_from_user(uioc, arg, sizeof(nitioctl_t)) ) + return (-EFAULT); + return 0; +#endif + } + + /* + * Else assume we have mimd uioctl_t as arg. Convert to nitioctl_t + * + * Get the user ioctl structure + */ + if( copy_from_user(&uioc_mimd, arg, sizeof(struct uioctl_t)) ) + return (-EFAULT); + + + /* + * Get the opcode and subopcode for the commands + */ + opcode = uioc_mimd.ui.fcs.opcode; + subopcode = uioc_mimd.ui.fcs.subopcode; + + switch (opcode) { + case 0x82: + + switch (subopcode) { + + case MEGAIOC_QDRVRVER: /* Query driver version */ + uioc->opcode = GET_DRIVER_VER; + uioc->uioc_uaddr = uioc_mimd.data; + break; + + case MEGAIOC_QNADAP: /* Get # of adapters */ + uioc->opcode = GET_N_ADAP; + uioc->uioc_uaddr = uioc_mimd.data; + break; + + case MEGAIOC_QADAPINFO: /* Get adapter information */ + uioc->opcode = GET_ADAP_INFO; + uioc->adapno = uioc_mimd.ui.fcs.adapno; + uioc->uioc_uaddr = uioc_mimd.data; + break; + + default: + return(-EINVAL); + } + + break; + + + case 0x81: + + uioc->opcode = MBOX_CMD; + uioc->adapno = uioc_mimd.ui.fcs.adapno; + + memcpy(uioc->uioc_rmbox, uioc_mimd.mbox, 18); + + uioc->xferlen = uioc_mimd.ui.fcs.length; + + if( uioc_mimd.outlen ) uioc->flags = UIOC_RD; + if( uioc_mimd.inlen ) uioc->flags |= UIOC_WR; + + break; + + case 0x80: + + uioc->opcode = MBOX_CMD; + uioc->adapno = uioc_mimd.ui.fcs.adapno; + + memcpy(uioc->uioc_rmbox, uioc_mimd.mbox, 18); + + /* + * Choose the xferlen bigger of input and output data + */ + uioc->xferlen = uioc_mimd.outlen > uioc_mimd.inlen ? + uioc_mimd.outlen : uioc_mimd.inlen; + + if( uioc_mimd.outlen ) uioc->flags = UIOC_RD; + if( uioc_mimd.inlen ) uioc->flags |= UIOC_WR; + + break; + + default: + return (-EINVAL); + + } + + return 0; +} + +/* + * mega_n_to_m() + * @arg: user address + * @mc: mailbox command + * + * Updates the status information to the application, depending on application + * conforms to older mimd ioctl interface or newer NIT ioctl interface + */ +static int +mega_n_to_m(void __user *arg, megacmd_t *mc) +{ + nitioctl_t __user *uiocp; + megacmd_t __user *umc; + mega_passthru __user *upthru; + struct uioctl_t __user *uioc_mimd; + char signature[8] = {0}; + + /* + * check is the application conforms to NIT. + */ + if( copy_from_user(signature, arg, 7) ) + return -EFAULT; + + if( memcmp(signature, "MEGANIT", 7) == 0 ) { + + uiocp = arg; + + if( put_user(mc->status, (u8 __user *)&MBOX_P(uiocp)->status) ) + return (-EFAULT); + + if( mc->cmd == MEGA_MBOXCMD_PASSTHRU ) { + + umc = MBOX_P(uiocp); + + if (get_user(upthru, (mega_passthru __user * __user *)&umc->xferaddr)) + return -EFAULT; + + if( put_user(mc->status, (u8 __user *)&upthru->scsistatus)) + return (-EFAULT); + } + } + else { + uioc_mimd = arg; + + if( put_user(mc->status, (u8 __user *)&uioc_mimd->mbox[17]) ) + return (-EFAULT); + + if( mc->cmd == MEGA_MBOXCMD_PASSTHRU ) { + + umc = (megacmd_t __user *)uioc_mimd->mbox; + + if (get_user(upthru, (mega_passthru __user * __user *)&umc->xferaddr)) + return (-EFAULT); + + if( put_user(mc->status, (u8 __user *)&upthru->scsistatus) ) + return (-EFAULT); + } + } + + return 0; +} + + +/* + * MEGARAID 'FW' commands. + */ + +/** + * mega_is_bios_enabled() + * @adapter: pointer to our soft state + * + * issue command to find out if the BIOS is enabled for this controller + */ +static int +mega_is_bios_enabled(adapter_t *adapter) +{ + struct mbox_out mbox; + unsigned char *raw_mbox = (u8 *)&mbox; + + memset(&mbox, 0, sizeof(mbox)); + + memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE); + + mbox.xferaddr = (u32)adapter->buf_dma_handle; + + raw_mbox[0] = IS_BIOS_ENABLED; + raw_mbox[2] = GET_BIOS; + + issue_scb_block(adapter, raw_mbox); + + return *(char *)adapter->mega_buffer; +} + + +/** + * mega_enum_raid_scsi() + * @adapter: pointer to our soft state + * + * Find out what channels are RAID/SCSI. This information is used to + * differentiate the virtual channels and physical channels and to support + * ROMB feature and non-disk devices. + */ +static void +mega_enum_raid_scsi(adapter_t *adapter) +{ + struct mbox_out mbox; + unsigned char *raw_mbox = (u8 *)&mbox; + int i; + + memset(&mbox, 0, sizeof(mbox)); + + /* + * issue command to find out what channels are raid/scsi + */ + raw_mbox[0] = CHNL_CLASS; + raw_mbox[2] = GET_CHNL_CLASS; + + memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE); + + mbox.xferaddr = (u32)adapter->buf_dma_handle; + + /* + * Non-ROMB firmware fail this command, so all channels + * must be shown RAID + */ + adapter->mega_ch_class = 0xFF; + + if(!issue_scb_block(adapter, raw_mbox)) { + adapter->mega_ch_class = *((char *)adapter->mega_buffer); + + } + + for( i = 0; i < adapter->product_info.nchannels; i++ ) { + if( (adapter->mega_ch_class >> i) & 0x01 ) { + dev_info(&adapter->dev->dev, "channel[%d] is raid\n", + i); + } + else { + dev_info(&adapter->dev->dev, "channel[%d] is scsi\n", + i); + } + } + + return; +} + + +/** + * mega_get_boot_drv() + * @adapter: pointer to our soft state + * + * Find out which device is the boot device. Note, any logical drive or any + * phyical device (e.g., a CDROM) can be designated as a boot device. + */ +static void +mega_get_boot_drv(adapter_t *adapter) +{ + struct private_bios_data *prv_bios_data; + struct mbox_out mbox; + unsigned char *raw_mbox = (u8 *)&mbox; + u16 cksum = 0; + u8 *cksum_p; + u8 boot_pdrv; + int i; + + memset(&mbox, 0, sizeof(mbox)); + + raw_mbox[0] = BIOS_PVT_DATA; + raw_mbox[2] = GET_BIOS_PVT_DATA; + + memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE); + + mbox.xferaddr = (u32)adapter->buf_dma_handle; + + adapter->boot_ldrv_enabled = 0; + adapter->boot_ldrv = 0; + + adapter->boot_pdrv_enabled = 0; + adapter->boot_pdrv_ch = 0; + adapter->boot_pdrv_tgt = 0; + + if(issue_scb_block(adapter, raw_mbox) == 0) { + prv_bios_data = + (struct private_bios_data *)adapter->mega_buffer; + + cksum = 0; + cksum_p = (char *)prv_bios_data; + for (i = 0; i < 14; i++ ) { + cksum += (u16)(*cksum_p++); + } + + if (prv_bios_data->cksum == (u16)(0-cksum) ) { + + /* + * If MSB is set, a physical drive is set as boot + * device + */ + if( prv_bios_data->boot_drv & 0x80 ) { + adapter->boot_pdrv_enabled = 1; + boot_pdrv = prv_bios_data->boot_drv & 0x7F; + adapter->boot_pdrv_ch = boot_pdrv / 16; + adapter->boot_pdrv_tgt = boot_pdrv % 16; + } + else { + adapter->boot_ldrv_enabled = 1; + adapter->boot_ldrv = prv_bios_data->boot_drv; + } + } + } + +} + +/** + * mega_support_random_del() + * @adapter: pointer to our soft state + * + * Find out if this controller supports random deletion and addition of + * logical drives + */ +static int +mega_support_random_del(adapter_t *adapter) +{ + struct mbox_out mbox; + unsigned char *raw_mbox = (u8 *)&mbox; + int rval; + + memset(&mbox, 0, sizeof(mbox)); + + /* + * issue command + */ + raw_mbox[0] = FC_DEL_LOGDRV; + raw_mbox[2] = OP_SUP_DEL_LOGDRV; + + rval = issue_scb_block(adapter, raw_mbox); + + return !rval; +} + + +/** + * mega_support_ext_cdb() + * @adapter: pointer to our soft state + * + * Find out if this firmware support cdblen > 10 + */ +static int +mega_support_ext_cdb(adapter_t *adapter) +{ + struct mbox_out mbox; + unsigned char *raw_mbox = (u8 *)&mbox; + int rval; + + memset(&mbox, 0, sizeof(mbox)); + /* + * issue command to find out if controller supports extended CDBs. + */ + raw_mbox[0] = 0xA4; + raw_mbox[2] = 0x16; + + rval = issue_scb_block(adapter, raw_mbox); + + return !rval; +} + + +/** + * mega_del_logdrv() + * @adapter: pointer to our soft state + * @logdrv: logical drive to be deleted + * + * Delete the specified logical drive. It is the responsibility of the user + * app to let the OS know about this operation. + */ +static int +mega_del_logdrv(adapter_t *adapter, int logdrv) +{ + unsigned long flags; + scb_t *scb; + int rval; + + /* + * Stop sending commands to the controller, queue them internally. + * When deletion is complete, ISR will flush the queue. + */ + atomic_set(&adapter->quiescent, 1); + + /* + * Wait till all the issued commands are complete and there are no + * commands in the pending queue + */ + while (atomic_read(&adapter->pend_cmds) > 0 || + !list_empty(&adapter->pending_list)) + msleep(1000); /* sleep for 1s */ + + rval = mega_do_del_logdrv(adapter, logdrv); + + spin_lock_irqsave(&adapter->lock, flags); + + /* + * If delete operation was successful, add 0x80 to the logical drive + * ids for commands in the pending queue. + */ + if (adapter->read_ldidmap) { + struct list_head *pos; + list_for_each(pos, &adapter->pending_list) { + scb = list_entry(pos, scb_t, list); + if (scb->pthru->logdrv < 0x80 ) + scb->pthru->logdrv += 0x80; + } + } + + atomic_set(&adapter->quiescent, 0); + + mega_runpendq(adapter); + + spin_unlock_irqrestore(&adapter->lock, flags); + + return rval; +} + + +static int +mega_do_del_logdrv(adapter_t *adapter, int logdrv) +{ + megacmd_t mc; + int rval; + + memset( &mc, 0, sizeof(megacmd_t)); + + mc.cmd = FC_DEL_LOGDRV; + mc.opcode = OP_DEL_LOGDRV; + mc.subopcode = logdrv; + + rval = mega_internal_command(adapter, &mc, NULL); + + /* log this event */ + if(rval) { + dev_warn(&adapter->dev->dev, "Delete LD-%d failed", logdrv); + return rval; + } + + /* + * After deleting first logical drive, the logical drives must be + * addressed by adding 0x80 to the logical drive id. + */ + adapter->read_ldidmap = 1; + + return rval; +} + + +/** + * mega_get_max_sgl() + * @adapter: pointer to our soft state + * + * Find out the maximum number of scatter-gather elements supported by this + * version of the firmware + */ +static void +mega_get_max_sgl(adapter_t *adapter) +{ + struct mbox_out mbox; + unsigned char *raw_mbox = (u8 *)&mbox; + + memset(&mbox, 0, sizeof(mbox)); + + memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE); + + mbox.xferaddr = (u32)adapter->buf_dma_handle; + + raw_mbox[0] = MAIN_MISC_OPCODE; + raw_mbox[2] = GET_MAX_SG_SUPPORT; + + + if( issue_scb_block(adapter, raw_mbox) ) { + /* + * f/w does not support this command. Choose the default value + */ + adapter->sglen = MIN_SGLIST; + } + else { + adapter->sglen = *((char *)adapter->mega_buffer); + + /* + * Make sure this is not more than the resources we are + * planning to allocate + */ + if ( adapter->sglen > MAX_SGLIST ) + adapter->sglen = MAX_SGLIST; + } + + return; +} + + +/** + * mega_support_cluster() + * @adapter: pointer to our soft state + * + * Find out if this firmware support cluster calls. + */ +static int +mega_support_cluster(adapter_t *adapter) +{ + struct mbox_out mbox; + unsigned char *raw_mbox = (u8 *)&mbox; + + memset(&mbox, 0, sizeof(mbox)); + + memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE); + + mbox.xferaddr = (u32)adapter->buf_dma_handle; + + /* + * Try to get the initiator id. This command will succeed iff the + * clustering is available on this HBA. + */ + raw_mbox[0] = MEGA_GET_TARGET_ID; + + if( issue_scb_block(adapter, raw_mbox) == 0 ) { + + /* + * Cluster support available. Get the initiator target id. + * Tell our id to mid-layer too. + */ + adapter->this_id = *(u32 *)adapter->mega_buffer; + adapter->host->this_id = adapter->this_id; + + return 1; + } + + return 0; +} + +#ifdef CONFIG_PROC_FS +/** + * mega_adapinq() + * @adapter: pointer to our soft state + * @dma_handle: DMA address of the buffer + * + * Issue internal commands while interrupts are available. + * We only issue direct mailbox commands from within the driver. ioctl() + * interface using these routines can issue passthru commands. + */ +static int +mega_adapinq(adapter_t *adapter, dma_addr_t dma_handle) +{ + megacmd_t mc; + + memset(&mc, 0, sizeof(megacmd_t)); + + if( adapter->flag & BOARD_40LD ) { + mc.cmd = FC_NEW_CONFIG; + mc.opcode = NC_SUBOP_ENQUIRY3; + mc.subopcode = ENQ3_GET_SOLICITED_FULL; + } + else { + mc.cmd = MEGA_MBOXCMD_ADPEXTINQ; + } + + mc.xferaddr = (u32)dma_handle; + + if ( mega_internal_command(adapter, &mc, NULL) != 0 ) { + return -1; + } + + return 0; +} + + +/** + * mega_internal_dev_inquiry() + * @adapter: pointer to our soft state + * @ch: channel for this device + * @tgt: ID of this device + * @buf_dma_handle: DMA address of the buffer + * + * Issue the scsi inquiry for the specified device. + */ +static int +mega_internal_dev_inquiry(adapter_t *adapter, u8 ch, u8 tgt, + dma_addr_t buf_dma_handle) +{ + mega_passthru *pthru; + dma_addr_t pthru_dma_handle; + megacmd_t mc; + int rval; + struct pci_dev *pdev; + + + /* + * For all internal commands, the buffer must be allocated in <4GB + * address range + */ + if( make_local_pdev(adapter, &pdev) != 0 ) return -1; + + pthru = dma_alloc_coherent(&pdev->dev, sizeof(mega_passthru), + &pthru_dma_handle, GFP_KERNEL); + + if( pthru == NULL ) { + free_local_pdev(pdev); + return -1; + } + + pthru->timeout = 2; + pthru->ars = 1; + pthru->reqsenselen = 14; + pthru->islogical = 0; + + pthru->channel = (adapter->flag & BOARD_40LD) ? 0 : ch; + + pthru->target = (adapter->flag & BOARD_40LD) ? (ch << 4)|tgt : tgt; + + pthru->cdblen = 6; + + pthru->cdb[0] = INQUIRY; + pthru->cdb[1] = 0; + pthru->cdb[2] = 0; + pthru->cdb[3] = 0; + pthru->cdb[4] = 255; + pthru->cdb[5] = 0; + + + pthru->dataxferaddr = (u32)buf_dma_handle; + pthru->dataxferlen = 256; + + memset(&mc, 0, sizeof(megacmd_t)); + + mc.cmd = MEGA_MBOXCMD_PASSTHRU; + mc.xferaddr = (u32)pthru_dma_handle; + + rval = mega_internal_command(adapter, &mc, pthru); + + dma_free_coherent(&pdev->dev, sizeof(mega_passthru), pthru, + pthru_dma_handle); + + free_local_pdev(pdev); + + return rval; +} +#endif + +/** + * mega_internal_command() + * @adapter: pointer to our soft state + * @mc: the mailbox command + * @pthru: Passthru structure for DCDB commands + * + * Issue the internal commands in interrupt mode. + * The last argument is the address of the passthru structure if the command + * to be fired is a passthru command + * + * Note: parameter 'pthru' is null for non-passthru commands. + */ +static int +mega_internal_command(adapter_t *adapter, megacmd_t *mc, mega_passthru *pthru) +{ + unsigned long flags; + scb_t *scb; + int rval; + + /* + * The internal commands share one command id and hence are + * serialized. This is so because we want to reserve maximum number of + * available command ids for the I/O commands. + */ + mutex_lock(&adapter->int_mtx); + + scb = &adapter->int_scb; + memset(scb, 0, sizeof(scb_t)); + + scb->idx = CMDID_INT_CMDS; + scb->state |= SCB_ACTIVE | SCB_PENDQ; + + memcpy(scb->raw_mbox, mc, sizeof(megacmd_t)); + + /* + * Is it a passthru command + */ + if (mc->cmd == MEGA_MBOXCMD_PASSTHRU) + scb->pthru = pthru; + + spin_lock_irqsave(&adapter->lock, flags); + list_add_tail(&scb->list, &adapter->pending_list); + /* + * Check if the HBA is in quiescent state, e.g., during a + * delete logical drive opertion. If it is, don't run + * the pending_list. + */ + if (atomic_read(&adapter->quiescent) == 0) + mega_runpendq(adapter); + spin_unlock_irqrestore(&adapter->lock, flags); + + wait_for_completion(&adapter->int_waitq); + + mc->status = rval = adapter->int_status; + + /* + * Print a debug message for all failed commands. Applications can use + * this information. + */ + if (rval && trace_level) { + dev_info(&adapter->dev->dev, "cmd [%x, %x, %x] status:[%x]\n", + mc->cmd, mc->opcode, mc->subopcode, rval); + } + + mutex_unlock(&adapter->int_mtx); + return rval; +} + +static struct scsi_host_template megaraid_template = { + .module = THIS_MODULE, + .name = "MegaRAID", + .proc_name = "megaraid_legacy", + .info = megaraid_info, + .queuecommand = megaraid_queue, + .bios_param = megaraid_biosparam, + .max_sectors = MAX_SECTORS_PER_IO, + .can_queue = MAX_COMMANDS, + .this_id = DEFAULT_INITIATOR_ID, + .sg_tablesize = MAX_SGLIST, + .cmd_per_lun = DEF_CMD_PER_LUN, + .eh_abort_handler = megaraid_abort, + .eh_device_reset_handler = megaraid_reset, + .eh_bus_reset_handler = megaraid_reset, + .eh_host_reset_handler = megaraid_reset, + .no_write_same = 1, + .cmd_size = sizeof(struct megaraid_cmd_priv), +}; + +static int +megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id) +{ + struct Scsi_Host *host; + adapter_t *adapter; + unsigned long mega_baseport, tbase, flag = 0; + u16 subsysid, subsysvid; + u8 pci_bus, pci_dev_func; + int irq, i, j; + int error = -ENODEV; + + if (hba_count >= MAX_CONTROLLERS) + goto out; + + if (pci_enable_device(pdev)) + goto out; + pci_set_master(pdev); + + pci_bus = pdev->bus->number; + pci_dev_func = pdev->devfn; + + /* + * The megaraid3 stuff reports the ID of the Intel part which is not + * remotely specific to the megaraid + */ + if (pdev->vendor == PCI_VENDOR_ID_INTEL) { + u16 magic; + /* + * Don't fall over the Compaq management cards using the same + * PCI identifier + */ + if (pdev->subsystem_vendor == PCI_VENDOR_ID_COMPAQ && + pdev->subsystem_device == 0xC000) + goto out_disable_device; + /* Now check the magic signature byte */ + pci_read_config_word(pdev, PCI_CONF_AMISIG, &magic); + if (magic != HBA_SIGNATURE_471 && magic != HBA_SIGNATURE) + goto out_disable_device; + /* Ok it is probably a megaraid */ + } + + /* + * For these vendor and device ids, signature offsets are not + * valid and 64 bit is implicit + */ + if (id->driver_data & BOARD_64BIT) + flag |= BOARD_64BIT; + else { + u32 magic64; + + pci_read_config_dword(pdev, PCI_CONF_AMISIG64, &magic64); + if (magic64 == HBA_SIGNATURE_64BIT) + flag |= BOARD_64BIT; + } + + subsysvid = pdev->subsystem_vendor; + subsysid = pdev->subsystem_device; + + dev_notice(&pdev->dev, "found 0x%4.04x:0x%4.04x\n", + id->vendor, id->device); + + /* Read the base port and IRQ from PCI */ + mega_baseport = pci_resource_start(pdev, 0); + irq = pdev->irq; + + tbase = mega_baseport; + if (pci_resource_flags(pdev, 0) & IORESOURCE_MEM) { + flag |= BOARD_MEMMAP; + + if (!request_mem_region(mega_baseport, 128, "megaraid")) { + dev_warn(&pdev->dev, "mem region busy!\n"); + goto out_disable_device; + } + + mega_baseport = (unsigned long)ioremap(mega_baseport, 128); + if (!mega_baseport) { + dev_warn(&pdev->dev, "could not map hba memory\n"); + goto out_release_region; + } + } else { + flag |= BOARD_IOMAP; + mega_baseport += 0x10; + + if (!request_region(mega_baseport, 16, "megaraid")) + goto out_disable_device; + } + + /* Initialize SCSI Host structure */ + host = scsi_host_alloc(&megaraid_template, sizeof(adapter_t)); + if (!host) + goto out_iounmap; + + adapter = (adapter_t *)host->hostdata; + memset(adapter, 0, sizeof(adapter_t)); + + dev_notice(&pdev->dev, + "scsi%d:Found MegaRAID controller at 0x%lx, IRQ:%d\n", + host->host_no, mega_baseport, irq); + + adapter->base = mega_baseport; + if (flag & BOARD_MEMMAP) + adapter->mmio_base = (void __iomem *) mega_baseport; + + INIT_LIST_HEAD(&adapter->free_list); + INIT_LIST_HEAD(&adapter->pending_list); + INIT_LIST_HEAD(&adapter->completed_list); + + adapter->flag = flag; + spin_lock_init(&adapter->lock); + + host->cmd_per_lun = max_cmd_per_lun; + host->max_sectors = max_sectors_per_io; + + adapter->dev = pdev; + adapter->host = host; + + adapter->host->irq = irq; + + if (flag & BOARD_MEMMAP) + adapter->host->base = tbase; + else { + adapter->host->io_port = tbase; + adapter->host->n_io_port = 16; + } + + adapter->host->unique_id = (pci_bus << 8) | pci_dev_func; + + /* + * Allocate buffer to issue internal commands. + */ + adapter->mega_buffer = dma_alloc_coherent(&adapter->dev->dev, + MEGA_BUFFER_SIZE, + &adapter->buf_dma_handle, + GFP_KERNEL); + if (!adapter->mega_buffer) { + dev_warn(&pdev->dev, "out of RAM\n"); + goto out_host_put; + } + + adapter->scb_list = kmalloc_array(MAX_COMMANDS, sizeof(scb_t), + GFP_KERNEL); + if (!adapter->scb_list) { + dev_warn(&pdev->dev, "out of RAM\n"); + goto out_free_cmd_buffer; + } + + if (request_irq(irq, (adapter->flag & BOARD_MEMMAP) ? + megaraid_isr_memmapped : megaraid_isr_iomapped, + IRQF_SHARED, "megaraid", adapter)) { + dev_warn(&pdev->dev, "Couldn't register IRQ %d!\n", irq); + goto out_free_scb_list; + } + + if (mega_setup_mailbox(adapter)) + goto out_free_irq; + + if (mega_query_adapter(adapter)) + goto out_free_mbox; + + /* + * Have checks for some buggy f/w + */ + if ((subsysid == 0x1111) && (subsysvid == 0x1111)) { + /* + * Which firmware + */ + if (!strcmp(adapter->fw_version, "3.00") || + !strcmp(adapter->fw_version, "3.01")) { + + dev_warn(&pdev->dev, + "Your card is a Dell PERC " + "2/SC RAID controller with " + "firmware\nmegaraid: 3.00 or 3.01. " + "This driver is known to have " + "corruption issues\nmegaraid: with " + "those firmware versions on this " + "specific card. In order\nmegaraid: " + "to protect your data, please upgrade " + "your firmware to version\nmegaraid: " + "3.10 or later, available from the " + "Dell Technical Support web\n" + "megaraid: site at\nhttp://support." + "dell.com/us/en/filelib/download/" + "index.asp?fileid=2940\n" + ); + } + } + + /* + * If we have a HP 1M(0x60E7)/2M(0x60E8) controller with + * firmware H.01.07, H.01.08, and H.01.09 disable 64 bit + * support, since this firmware cannot handle 64 bit + * addressing + */ + if ((subsysvid == PCI_VENDOR_ID_HP) && + ((subsysid == 0x60E7) || (subsysid == 0x60E8))) { + /* + * which firmware + */ + if (!strcmp(adapter->fw_version, "H01.07") || + !strcmp(adapter->fw_version, "H01.08") || + !strcmp(adapter->fw_version, "H01.09") ) { + dev_warn(&pdev->dev, + "Firmware H.01.07, " + "H.01.08, and H.01.09 on 1M/2M " + "controllers\n" + "do not support 64 bit " + "addressing.\nDISABLING " + "64 bit support.\n"); + adapter->flag &= ~BOARD_64BIT; + } + } + + if (mega_is_bios_enabled(adapter)) + mega_hbas[hba_count].is_bios_enabled = 1; + mega_hbas[hba_count].hostdata_addr = adapter; + + /* + * Find out which channel is raid and which is scsi. This is + * for ROMB support. + */ + mega_enum_raid_scsi(adapter); + + /* + * Find out if a logical drive is set as the boot drive. If + * there is one, will make that as the first logical drive. + * ROMB: Do we have to boot from a physical drive. Then all + * the physical drives would appear before the logical disks. + * Else, all the physical drives would be exported to the mid + * layer after logical drives. + */ + mega_get_boot_drv(adapter); + + if (adapter->boot_pdrv_enabled) { + j = adapter->product_info.nchannels; + for( i = 0; i < j; i++ ) + adapter->logdrv_chan[i] = 0; + for( i = j; i < NVIRT_CHAN + j; i++ ) + adapter->logdrv_chan[i] = 1; + } else { + for (i = 0; i < NVIRT_CHAN; i++) + adapter->logdrv_chan[i] = 1; + for (i = NVIRT_CHAN; i < MAX_CHANNELS+NVIRT_CHAN; i++) + adapter->logdrv_chan[i] = 0; + adapter->mega_ch_class <<= NVIRT_CHAN; + } + + /* + * Do we support random deletion and addition of logical + * drives + */ + adapter->read_ldidmap = 0; /* set it after first logdrv + delete cmd */ + adapter->support_random_del = mega_support_random_del(adapter); + + /* Initialize SCBs */ + if (mega_init_scb(adapter)) + goto out_free_mbox; + + /* + * Reset the pending commands counter + */ + atomic_set(&adapter->pend_cmds, 0); + + /* + * Reset the adapter quiescent flag + */ + atomic_set(&adapter->quiescent, 0); + + hba_soft_state[hba_count] = adapter; + + /* + * Fill in the structure which needs to be passed back to the + * application when it does an ioctl() for controller related + * information. + */ + i = hba_count; + + mcontroller[i].base = mega_baseport; + mcontroller[i].irq = irq; + mcontroller[i].numldrv = adapter->numldrv; + mcontroller[i].pcibus = pci_bus; + mcontroller[i].pcidev = id->device; + mcontroller[i].pcifun = PCI_FUNC (pci_dev_func); + mcontroller[i].pciid = -1; + mcontroller[i].pcivendor = id->vendor; + mcontroller[i].pcislot = PCI_SLOT(pci_dev_func); + mcontroller[i].uid = (pci_bus << 8) | pci_dev_func; + + + /* Set the Mode of addressing to 64 bit if we can */ + if ((adapter->flag & BOARD_64BIT) && (sizeof(dma_addr_t) == 8)) { + dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)); + adapter->has_64bit_addr = 1; + } else { + dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)); + adapter->has_64bit_addr = 0; + } + + mutex_init(&adapter->int_mtx); + init_completion(&adapter->int_waitq); + + adapter->this_id = DEFAULT_INITIATOR_ID; + adapter->host->this_id = DEFAULT_INITIATOR_ID; + +#if MEGA_HAVE_CLUSTERING + /* + * Is cluster support enabled on this controller + * Note: In a cluster the HBAs ( the initiators ) will have + * different target IDs and we cannot assume it to be 7. Call + * to mega_support_cluster() will get the target ids also if + * the cluster support is available + */ + adapter->has_cluster = mega_support_cluster(adapter); + if (adapter->has_cluster) { + dev_notice(&pdev->dev, + "Cluster driver, initiator id:%d\n", + adapter->this_id); + } +#endif + + pci_set_drvdata(pdev, host); + + mega_create_proc_entry(hba_count, mega_proc_dir_entry); + + error = scsi_add_host(host, &pdev->dev); + if (error) + goto out_free_mbox; + + scsi_scan_host(host); + hba_count++; + return 0; + + out_free_mbox: + dma_free_coherent(&adapter->dev->dev, sizeof(mbox64_t), + adapter->una_mbox64, adapter->una_mbox64_dma); + out_free_irq: + free_irq(adapter->host->irq, adapter); + out_free_scb_list: + kfree(adapter->scb_list); + out_free_cmd_buffer: + dma_free_coherent(&adapter->dev->dev, MEGA_BUFFER_SIZE, + adapter->mega_buffer, adapter->buf_dma_handle); + out_host_put: + scsi_host_put(host); + out_iounmap: + if (flag & BOARD_MEMMAP) + iounmap((void *)mega_baseport); + out_release_region: + if (flag & BOARD_MEMMAP) + release_mem_region(tbase, 128); + else + release_region(mega_baseport, 16); + out_disable_device: + pci_disable_device(pdev); + out: + return error; +} + +static void +__megaraid_shutdown(adapter_t *adapter) +{ + u_char raw_mbox[sizeof(struct mbox_out)]; + mbox_t *mbox = (mbox_t *)raw_mbox; + int i; + + /* Flush adapter cache */ + memset(&mbox->m_out, 0, sizeof(raw_mbox)); + raw_mbox[0] = FLUSH_ADAPTER; + + free_irq(adapter->host->irq, adapter); + + /* Issue a blocking (interrupts disabled) command to the card */ + issue_scb_block(adapter, raw_mbox); + + /* Flush disks cache */ + memset(&mbox->m_out, 0, sizeof(raw_mbox)); + raw_mbox[0] = FLUSH_SYSTEM; + + /* Issue a blocking (interrupts disabled) command to the card */ + issue_scb_block(adapter, raw_mbox); + + if (atomic_read(&adapter->pend_cmds) > 0) + dev_warn(&adapter->dev->dev, "pending commands!!\n"); + + /* + * Have a delibrate delay to make sure all the caches are + * actually flushed. + */ + for (i = 0; i <= 10; i++) + mdelay(1000); +} + +static void +megaraid_remove_one(struct pci_dev *pdev) +{ + struct Scsi_Host *host = pci_get_drvdata(pdev); + adapter_t *adapter = (adapter_t *)host->hostdata; + char buf[12] = { 0 }; + + scsi_remove_host(host); + + __megaraid_shutdown(adapter); + + /* Free our resources */ + if (adapter->flag & BOARD_MEMMAP) { + iounmap((void *)adapter->base); + release_mem_region(adapter->host->base, 128); + } else + release_region(adapter->base, 16); + + mega_free_sgl(adapter); + + sprintf(buf, "hba%d", adapter->host->host_no); + remove_proc_subtree(buf, mega_proc_dir_entry); + + dma_free_coherent(&adapter->dev->dev, MEGA_BUFFER_SIZE, + adapter->mega_buffer, adapter->buf_dma_handle); + kfree(adapter->scb_list); + dma_free_coherent(&adapter->dev->dev, sizeof(mbox64_t), + adapter->una_mbox64, adapter->una_mbox64_dma); + + scsi_host_put(host); + pci_disable_device(pdev); + + hba_count--; +} + +static void +megaraid_shutdown(struct pci_dev *pdev) +{ + struct Scsi_Host *host = pci_get_drvdata(pdev); + adapter_t *adapter = (adapter_t *)host->hostdata; + + __megaraid_shutdown(adapter); +} + +static struct pci_device_id megaraid_pci_tbl[] = { + {PCI_VENDOR_ID_AMI, PCI_DEVICE_ID_AMI_MEGARAID, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, + {PCI_VENDOR_ID_AMI, PCI_DEVICE_ID_AMI_MEGARAID2, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, + {PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_AMI_MEGARAID3, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, + {0,} +}; +MODULE_DEVICE_TABLE(pci, megaraid_pci_tbl); + +static struct pci_driver megaraid_pci_driver = { + .name = "megaraid_legacy", + .id_table = megaraid_pci_tbl, + .probe = megaraid_probe_one, + .remove = megaraid_remove_one, + .shutdown = megaraid_shutdown, +}; + +static int __init megaraid_init(void) +{ + int error; + + if ((max_cmd_per_lun <= 0) || (max_cmd_per_lun > MAX_CMD_PER_LUN)) + max_cmd_per_lun = MAX_CMD_PER_LUN; + if (max_mbox_busy_wait > MBOX_BUSY_WAIT) + max_mbox_busy_wait = MBOX_BUSY_WAIT; + +#ifdef CONFIG_PROC_FS + mega_proc_dir_entry = proc_mkdir("megaraid", NULL); + if (!mega_proc_dir_entry) { + printk(KERN_WARNING + "megaraid: failed to create megaraid root\n"); + } +#endif + error = pci_register_driver(&megaraid_pci_driver); + if (error) { +#ifdef CONFIG_PROC_FS + remove_proc_entry("megaraid", NULL); +#endif + return error; + } + + /* + * Register the driver as a character device, for applications + * to access it for ioctls. + * First argument (major) to register_chrdev implies a dynamic + * major number allocation. + */ + major = register_chrdev(0, "megadev_legacy", &megadev_fops); + if (major < 0) { + printk(KERN_WARNING + "megaraid: failed to register char device\n"); + } + + return 0; +} + +static void __exit megaraid_exit(void) +{ + /* + * Unregister the character device interface to the driver. + */ + unregister_chrdev(major, "megadev_legacy"); + + pci_unregister_driver(&megaraid_pci_driver); + +#ifdef CONFIG_PROC_FS + remove_proc_entry("megaraid", NULL); +#endif +} + +module_init(megaraid_init); +module_exit(megaraid_exit); + +/* vi: set ts=8 sw=8 tw=78: */ |