diff options
Diffstat (limited to 'drivers/misc/bcm-vk/bcm_vk_dev.c')
| -rw-r--r-- | drivers/misc/bcm-vk/bcm_vk_dev.c | 1652 |
1 files changed, 1652 insertions, 0 deletions
diff --git a/drivers/misc/bcm-vk/bcm_vk_dev.c b/drivers/misc/bcm-vk/bcm_vk_dev.c new file mode 100644 index 0000000000..d4a9613772 --- /dev/null +++ b/drivers/misc/bcm-vk/bcm_vk_dev.c @@ -0,0 +1,1652 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright 2018-2020 Broadcom. + */ + +#include <linux/delay.h> +#include <linux/dma-mapping.h> +#include <linux/firmware.h> +#include <linux/fs.h> +#include <linux/idr.h> +#include <linux/interrupt.h> +#include <linux/panic_notifier.h> +#include <linux/kref.h> +#include <linux/module.h> +#include <linux/mutex.h> +#include <linux/pci.h> +#include <linux/pci_regs.h> +#include <uapi/linux/misc/bcm_vk.h> + +#include "bcm_vk.h" + +#define PCI_DEVICE_ID_VALKYRIE 0x5e87 +#define PCI_DEVICE_ID_VIPER 0x5e88 + +static DEFINE_IDA(bcm_vk_ida); + +enum soc_idx { + VALKYRIE_A0 = 0, + VALKYRIE_B0, + VIPER, + VK_IDX_INVALID +}; + +enum img_idx { + IMG_PRI = 0, + IMG_SEC, + IMG_PER_TYPE_MAX +}; + +struct load_image_entry { + const u32 image_type; + const char *image_name[IMG_PER_TYPE_MAX]; +}; + +#define NUM_BOOT_STAGES 2 +/* default firmware images names */ +static const struct load_image_entry image_tab[][NUM_BOOT_STAGES] = { + [VALKYRIE_A0] = { + {VK_IMAGE_TYPE_BOOT1, {"vk_a0-boot1.bin", "vk-boot1.bin"}}, + {VK_IMAGE_TYPE_BOOT2, {"vk_a0-boot2.bin", "vk-boot2.bin"}} + }, + [VALKYRIE_B0] = { + {VK_IMAGE_TYPE_BOOT1, {"vk_b0-boot1.bin", "vk-boot1.bin"}}, + {VK_IMAGE_TYPE_BOOT2, {"vk_b0-boot2.bin", "vk-boot2.bin"}} + }, + + [VIPER] = { + {VK_IMAGE_TYPE_BOOT1, {"vp-boot1.bin", ""}}, + {VK_IMAGE_TYPE_BOOT2, {"vp-boot2.bin", ""}} + }, +}; + +/* Location of memory base addresses of interest in BAR1 */ +/* Load Boot1 to start of ITCM */ +#define BAR1_CODEPUSH_BASE_BOOT1 0x100000 + +/* Allow minimum 1s for Load Image timeout responses */ +#define LOAD_IMAGE_TIMEOUT_MS (1 * MSEC_PER_SEC) + +/* Image startup timeouts */ +#define BOOT1_STARTUP_TIMEOUT_MS (5 * MSEC_PER_SEC) +#define BOOT2_STARTUP_TIMEOUT_MS (10 * MSEC_PER_SEC) + +/* 1ms wait for checking the transfer complete status */ +#define TXFR_COMPLETE_TIMEOUT_MS 1 + +/* MSIX usages */ +#define VK_MSIX_MSGQ_MAX 3 +#define VK_MSIX_NOTF_MAX 1 +#define VK_MSIX_TTY_MAX BCM_VK_NUM_TTY +#define VK_MSIX_IRQ_MAX (VK_MSIX_MSGQ_MAX + VK_MSIX_NOTF_MAX + \ + VK_MSIX_TTY_MAX) +#define VK_MSIX_IRQ_MIN_REQ (VK_MSIX_MSGQ_MAX + VK_MSIX_NOTF_MAX) + +/* Number of bits set in DMA mask*/ +#define BCM_VK_DMA_BITS 64 + +/* Ucode boot wait time */ +#define BCM_VK_UCODE_BOOT_US (100 * USEC_PER_MSEC) +/* 50% margin */ +#define BCM_VK_UCODE_BOOT_MAX_US ((BCM_VK_UCODE_BOOT_US * 3) >> 1) + +/* deinit time for the card os after receiving doorbell */ +#define BCM_VK_DEINIT_TIME_MS (2 * MSEC_PER_SEC) + +/* + * module parameters + */ +static bool auto_load = true; +module_param(auto_load, bool, 0444); +MODULE_PARM_DESC(auto_load, + "Load images automatically at PCIe probe time.\n"); +static uint nr_scratch_pages = VK_BAR1_SCRATCH_DEF_NR_PAGES; +module_param(nr_scratch_pages, uint, 0444); +MODULE_PARM_DESC(nr_scratch_pages, + "Number of pre allocated DMAable coherent pages.\n"); +static uint nr_ib_sgl_blk = BCM_VK_DEF_IB_SGL_BLK_LEN; +module_param(nr_ib_sgl_blk, uint, 0444); +MODULE_PARM_DESC(nr_ib_sgl_blk, + "Number of in-band msg blks for short SGL.\n"); + +/* + * alerts that could be generated from peer + */ +const struct bcm_vk_entry bcm_vk_peer_err[BCM_VK_PEER_ERR_NUM] = { + {ERR_LOG_UECC, ERR_LOG_UECC, "uecc"}, + {ERR_LOG_SSIM_BUSY, ERR_LOG_SSIM_BUSY, "ssim_busy"}, + {ERR_LOG_AFBC_BUSY, ERR_LOG_AFBC_BUSY, "afbc_busy"}, + {ERR_LOG_HIGH_TEMP_ERR, ERR_LOG_HIGH_TEMP_ERR, "high_temp"}, + {ERR_LOG_WDOG_TIMEOUT, ERR_LOG_WDOG_TIMEOUT, "wdog_timeout"}, + {ERR_LOG_SYS_FAULT, ERR_LOG_SYS_FAULT, "sys_fault"}, + {ERR_LOG_RAMDUMP, ERR_LOG_RAMDUMP, "ramdump"}, + {ERR_LOG_COP_WDOG_TIMEOUT, ERR_LOG_COP_WDOG_TIMEOUT, + "cop_wdog_timeout"}, + {ERR_LOG_MEM_ALLOC_FAIL, ERR_LOG_MEM_ALLOC_FAIL, "malloc_fail warn"}, + {ERR_LOG_LOW_TEMP_WARN, ERR_LOG_LOW_TEMP_WARN, "low_temp warn"}, + {ERR_LOG_ECC, ERR_LOG_ECC, "ecc"}, + {ERR_LOG_IPC_DWN, ERR_LOG_IPC_DWN, "ipc_down"}, +}; + +/* alerts detected by the host */ +const struct bcm_vk_entry bcm_vk_host_err[BCM_VK_HOST_ERR_NUM] = { + {ERR_LOG_HOST_PCIE_DWN, ERR_LOG_HOST_PCIE_DWN, "PCIe_down"}, + {ERR_LOG_HOST_HB_FAIL, ERR_LOG_HOST_HB_FAIL, "hb_fail"}, + {ERR_LOG_HOST_INTF_V_FAIL, ERR_LOG_HOST_INTF_V_FAIL, "intf_ver_fail"}, +}; + +irqreturn_t bcm_vk_notf_irqhandler(int irq, void *dev_id) +{ + struct bcm_vk *vk = dev_id; + + if (!bcm_vk_drv_access_ok(vk)) { + dev_err(&vk->pdev->dev, + "Interrupt %d received when msgq not inited\n", irq); + goto skip_schedule_work; + } + + /* if notification is not pending, set bit and schedule work */ + if (test_and_set_bit(BCM_VK_WQ_NOTF_PEND, vk->wq_offload) == 0) + queue_work(vk->wq_thread, &vk->wq_work); + +skip_schedule_work: + return IRQ_HANDLED; +} + +static int bcm_vk_intf_ver_chk(struct bcm_vk *vk) +{ + struct device *dev = &vk->pdev->dev; + u32 reg; + u16 major, minor; + int ret = 0; + + /* read interface register */ + reg = vkread32(vk, BAR_0, BAR_INTF_VER); + major = (reg >> BAR_INTF_VER_MAJOR_SHIFT) & BAR_INTF_VER_MASK; + minor = reg & BAR_INTF_VER_MASK; + + /* + * if major number is 0, it is pre-release and it would be allowed + * to continue, else, check versions accordingly + */ + if (!major) { + dev_warn(dev, "Pre-release major.minor=%d.%d - drv %d.%d\n", + major, minor, SEMANTIC_MAJOR, SEMANTIC_MINOR); + } else if (major != SEMANTIC_MAJOR) { + dev_err(dev, + "Intf major.minor=%d.%d rejected - drv %d.%d\n", + major, minor, SEMANTIC_MAJOR, SEMANTIC_MINOR); + bcm_vk_set_host_alert(vk, ERR_LOG_HOST_INTF_V_FAIL); + ret = -EPFNOSUPPORT; + } else { + dev_dbg(dev, + "Intf major.minor=%d.%d passed - drv %d.%d\n", + major, minor, SEMANTIC_MAJOR, SEMANTIC_MINOR); + } + return ret; +} + +static void bcm_vk_log_notf(struct bcm_vk *vk, + struct bcm_vk_alert *alert, + struct bcm_vk_entry const *entry_tab, + const u32 table_size) +{ + u32 i; + u32 masked_val, latched_val; + struct bcm_vk_entry const *entry; + u32 reg; + u16 ecc_mem_err, uecc_mem_err; + struct device *dev = &vk->pdev->dev; + + for (i = 0; i < table_size; i++) { + entry = &entry_tab[i]; + masked_val = entry->mask & alert->notfs; + latched_val = entry->mask & alert->flags; + + if (masked_val == ERR_LOG_UECC) { + /* + * if there is difference between stored cnt and it + * is greater than threshold, log it. + */ + reg = vkread32(vk, BAR_0, BAR_CARD_ERR_MEM); + BCM_VK_EXTRACT_FIELD(uecc_mem_err, reg, + BCM_VK_MEM_ERR_FIELD_MASK, + BCM_VK_UECC_MEM_ERR_SHIFT); + if ((uecc_mem_err != vk->alert_cnts.uecc) && + (uecc_mem_err >= BCM_VK_UECC_THRESHOLD)) + dev_info(dev, + "ALERT! %s.%d uecc RAISED - ErrCnt %d\n", + DRV_MODULE_NAME, vk->devid, + uecc_mem_err); + vk->alert_cnts.uecc = uecc_mem_err; + } else if (masked_val == ERR_LOG_ECC) { + reg = vkread32(vk, BAR_0, BAR_CARD_ERR_MEM); + BCM_VK_EXTRACT_FIELD(ecc_mem_err, reg, + BCM_VK_MEM_ERR_FIELD_MASK, + BCM_VK_ECC_MEM_ERR_SHIFT); + if ((ecc_mem_err != vk->alert_cnts.ecc) && + (ecc_mem_err >= BCM_VK_ECC_THRESHOLD)) + dev_info(dev, "ALERT! %s.%d ecc RAISED - ErrCnt %d\n", + DRV_MODULE_NAME, vk->devid, + ecc_mem_err); + vk->alert_cnts.ecc = ecc_mem_err; + } else if (masked_val != latched_val) { + /* print a log as info */ + dev_info(dev, "ALERT! %s.%d %s %s\n", + DRV_MODULE_NAME, vk->devid, entry->str, + masked_val ? "RAISED" : "CLEARED"); + } + } +} + +static void bcm_vk_dump_peer_log(struct bcm_vk *vk) +{ + struct bcm_vk_peer_log log; + struct bcm_vk_peer_log *log_info = &vk->peerlog_info; + char loc_buf[BCM_VK_PEER_LOG_LINE_MAX]; + int cnt; + struct device *dev = &vk->pdev->dev; + unsigned int data_offset; + + memcpy_fromio(&log, vk->bar[BAR_2] + vk->peerlog_off, sizeof(log)); + + dev_dbg(dev, "Peer PANIC: Size 0x%x(0x%x), [Rd Wr] = [%d %d]\n", + log.buf_size, log.mask, log.rd_idx, log.wr_idx); + + if (!log_info->buf_size) { + dev_err(dev, "Peer log dump disabled - skipped!\n"); + return; + } + + /* perform range checking for rd/wr idx */ + if ((log.rd_idx > log_info->mask) || + (log.wr_idx > log_info->mask) || + (log.buf_size != log_info->buf_size) || + (log.mask != log_info->mask)) { + dev_err(dev, + "Corrupted Ptrs: Size 0x%x(0x%x) Mask 0x%x(0x%x) [Rd Wr] = [%d %d], skip log dump.\n", + log_info->buf_size, log.buf_size, + log_info->mask, log.mask, + log.rd_idx, log.wr_idx); + return; + } + + cnt = 0; + data_offset = vk->peerlog_off + sizeof(struct bcm_vk_peer_log); + loc_buf[BCM_VK_PEER_LOG_LINE_MAX - 1] = '\0'; + while (log.rd_idx != log.wr_idx) { + loc_buf[cnt] = vkread8(vk, BAR_2, data_offset + log.rd_idx); + + if ((loc_buf[cnt] == '\0') || + (cnt == (BCM_VK_PEER_LOG_LINE_MAX - 1))) { + dev_err(dev, "%s", loc_buf); + cnt = 0; + } else { + cnt++; + } + log.rd_idx = (log.rd_idx + 1) & log.mask; + } + /* update rd idx at the end */ + vkwrite32(vk, log.rd_idx, BAR_2, + vk->peerlog_off + offsetof(struct bcm_vk_peer_log, rd_idx)); +} + +void bcm_vk_handle_notf(struct bcm_vk *vk) +{ + u32 reg; + struct bcm_vk_alert alert; + bool intf_down; + unsigned long flags; + + /* handle peer alerts and then locally detected ones */ + reg = vkread32(vk, BAR_0, BAR_CARD_ERR_LOG); + intf_down = BCM_VK_INTF_IS_DOWN(reg); + if (!intf_down) { + vk->peer_alert.notfs = reg; + bcm_vk_log_notf(vk, &vk->peer_alert, bcm_vk_peer_err, + ARRAY_SIZE(bcm_vk_peer_err)); + vk->peer_alert.flags = vk->peer_alert.notfs; + } else { + /* turn off access */ + bcm_vk_blk_drv_access(vk); + } + + /* check and make copy of alert with lock and then free lock */ + spin_lock_irqsave(&vk->host_alert_lock, flags); + if (intf_down) + vk->host_alert.notfs |= ERR_LOG_HOST_PCIE_DWN; + + alert = vk->host_alert; + vk->host_alert.flags = vk->host_alert.notfs; + spin_unlock_irqrestore(&vk->host_alert_lock, flags); + + /* call display with copy */ + bcm_vk_log_notf(vk, &alert, bcm_vk_host_err, + ARRAY_SIZE(bcm_vk_host_err)); + + /* + * If it is a sys fault or heartbeat timeout, we would like extract + * log msg from the card so that we would know what is the last fault + */ + if (!intf_down && + ((vk->host_alert.flags & ERR_LOG_HOST_HB_FAIL) || + (vk->peer_alert.flags & ERR_LOG_SYS_FAULT))) + bcm_vk_dump_peer_log(vk); +} + +static inline int bcm_vk_wait(struct bcm_vk *vk, enum pci_barno bar, + u64 offset, u32 mask, u32 value, + unsigned long timeout_ms) +{ + struct device *dev = &vk->pdev->dev; + unsigned long start_time; + unsigned long timeout; + u32 rd_val, boot_status; + + start_time = jiffies; + timeout = start_time + msecs_to_jiffies(timeout_ms); + + do { + rd_val = vkread32(vk, bar, offset); + dev_dbg(dev, "BAR%d Offset=0x%llx: 0x%x\n", + bar, offset, rd_val); + + /* check for any boot err condition */ + boot_status = vkread32(vk, BAR_0, BAR_BOOT_STATUS); + if (boot_status & BOOT_ERR_MASK) { + dev_err(dev, "Boot Err 0x%x, progress 0x%x after %d ms\n", + (boot_status & BOOT_ERR_MASK) >> BOOT_ERR_SHIFT, + boot_status & BOOT_PROG_MASK, + jiffies_to_msecs(jiffies - start_time)); + return -EFAULT; + } + + if (time_after(jiffies, timeout)) + return -ETIMEDOUT; + + cpu_relax(); + cond_resched(); + } while ((rd_val & mask) != value); + + return 0; +} + +static void bcm_vk_get_card_info(struct bcm_vk *vk) +{ + struct device *dev = &vk->pdev->dev; + u32 offset; + int i; + u8 *dst; + struct bcm_vk_card_info *info = &vk->card_info; + + /* first read the offset from spare register */ + offset = vkread32(vk, BAR_0, BAR_CARD_STATIC_INFO); + offset &= (pci_resource_len(vk->pdev, BAR_2 * 2) - 1); + + /* based on the offset, read info to internal card info structure */ + dst = (u8 *)info; + for (i = 0; i < sizeof(*info); i++) + *dst++ = vkread8(vk, BAR_2, offset++); + +#define CARD_INFO_LOG_FMT "version : %x\n" \ + "os_tag : %s\n" \ + "cmpt_tag : %s\n" \ + "cpu_freq : %d MHz\n" \ + "cpu_scale : %d full, %d lowest\n" \ + "ddr_freq : %d MHz\n" \ + "ddr_size : %d MB\n" \ + "video_freq: %d MHz\n" + dev_dbg(dev, CARD_INFO_LOG_FMT, info->version, info->os_tag, + info->cmpt_tag, info->cpu_freq_mhz, info->cpu_scale[0], + info->cpu_scale[MAX_OPP - 1], info->ddr_freq_mhz, + info->ddr_size_MB, info->video_core_freq_mhz); + + /* + * get the peer log pointer, only need the offset, and get record + * of the log buffer information which would be used for checking + * before dump, in case the BAR2 memory has been corrupted. + */ + vk->peerlog_off = offset; + memcpy_fromio(&vk->peerlog_info, vk->bar[BAR_2] + vk->peerlog_off, + sizeof(vk->peerlog_info)); + + /* + * Do a range checking and if out of bound, the record will be zeroed + * which guarantees that nothing would be dumped. In other words, + * peer dump is disabled. + */ + if ((vk->peerlog_info.buf_size > BCM_VK_PEER_LOG_BUF_MAX) || + (vk->peerlog_info.mask != (vk->peerlog_info.buf_size - 1)) || + (vk->peerlog_info.rd_idx > vk->peerlog_info.mask) || + (vk->peerlog_info.wr_idx > vk->peerlog_info.mask)) { + dev_err(dev, "Peer log disabled - range error: Size 0x%x(0x%x), [Rd Wr] = [%d %d]\n", + vk->peerlog_info.buf_size, + vk->peerlog_info.mask, + vk->peerlog_info.rd_idx, + vk->peerlog_info.wr_idx); + memset(&vk->peerlog_info, 0, sizeof(vk->peerlog_info)); + } else { + dev_dbg(dev, "Peer log: Size 0x%x(0x%x), [Rd Wr] = [%d %d]\n", + vk->peerlog_info.buf_size, + vk->peerlog_info.mask, + vk->peerlog_info.rd_idx, + vk->peerlog_info.wr_idx); + } +} + +static void bcm_vk_get_proc_mon_info(struct bcm_vk *vk) +{ + struct device *dev = &vk->pdev->dev; + struct bcm_vk_proc_mon_info *mon = &vk->proc_mon_info; + u32 num, entry_size, offset, buf_size; + u8 *dst; + + /* calculate offset which is based on peerlog offset */ + buf_size = vkread32(vk, BAR_2, + vk->peerlog_off + + offsetof(struct bcm_vk_peer_log, buf_size)); + offset = vk->peerlog_off + sizeof(struct bcm_vk_peer_log) + + buf_size; + + /* first read the num and entry size */ + num = vkread32(vk, BAR_2, offset); + entry_size = vkread32(vk, BAR_2, offset + sizeof(num)); + + /* check for max allowed */ + if (num > BCM_VK_PROC_MON_MAX) { + dev_err(dev, "Processing monitoring entry %d exceeds max %d\n", + num, BCM_VK_PROC_MON_MAX); + return; + } + mon->num = num; + mon->entry_size = entry_size; + + vk->proc_mon_off = offset; + + /* read it once that will capture those static info */ + dst = (u8 *)&mon->entries[0]; + offset += sizeof(num) + sizeof(entry_size); + memcpy_fromio(dst, vk->bar[BAR_2] + offset, num * entry_size); +} + +static int bcm_vk_sync_card_info(struct bcm_vk *vk) +{ + u32 rdy_marker = vkread32(vk, BAR_1, VK_BAR1_MSGQ_DEF_RDY); + + /* check for marker, but allow diags mode to skip sync */ + if (!bcm_vk_msgq_marker_valid(vk)) + return (rdy_marker == VK_BAR1_DIAG_RDY_MARKER ? 0 : -EINVAL); + + /* + * Write down scratch addr which is used for DMA. For + * signed part, BAR1 is accessible only after boot2 has come + * up + */ + if (vk->tdma_addr) { + vkwrite32(vk, (u64)vk->tdma_addr >> 32, BAR_1, + VK_BAR1_SCRATCH_OFF_HI); + vkwrite32(vk, (u32)vk->tdma_addr, BAR_1, + VK_BAR1_SCRATCH_OFF_LO); + vkwrite32(vk, nr_scratch_pages * PAGE_SIZE, BAR_1, + VK_BAR1_SCRATCH_SZ_ADDR); + } + + /* get static card info, only need to read once */ + bcm_vk_get_card_info(vk); + + /* get the proc mon info once */ + bcm_vk_get_proc_mon_info(vk); + + return 0; +} + +void bcm_vk_blk_drv_access(struct bcm_vk *vk) +{ + int i; + + /* + * kill all the apps except for the process that is resetting. + * If not called during reset, reset_pid will be 0, and all will be + * killed. + */ + spin_lock(&vk->ctx_lock); + + /* set msgq_inited to 0 so that all rd/wr will be blocked */ + atomic_set(&vk->msgq_inited, 0); + + for (i = 0; i < VK_PID_HT_SZ; i++) { + struct bcm_vk_ctx *ctx; + + list_for_each_entry(ctx, &vk->pid_ht[i].head, node) { + if (ctx->pid != vk->reset_pid) { + dev_dbg(&vk->pdev->dev, + "Send kill signal to pid %d\n", + ctx->pid); + kill_pid(find_vpid(ctx->pid), SIGKILL, 1); + } + } + } + bcm_vk_tty_terminate_tty_user(vk); + spin_unlock(&vk->ctx_lock); +} + +static void bcm_vk_buf_notify(struct bcm_vk *vk, void *bufp, + dma_addr_t host_buf_addr, u32 buf_size) +{ + /* update the dma address to the card */ + vkwrite32(vk, (u64)host_buf_addr >> 32, BAR_1, + VK_BAR1_DMA_BUF_OFF_HI); + vkwrite32(vk, (u32)host_buf_addr, BAR_1, + VK_BAR1_DMA_BUF_OFF_LO); + vkwrite32(vk, buf_size, BAR_1, VK_BAR1_DMA_BUF_SZ); +} + +static int bcm_vk_load_image_by_type(struct bcm_vk *vk, u32 load_type, + const char *filename) +{ + struct device *dev = &vk->pdev->dev; + const struct firmware *fw = NULL; + void *bufp = NULL; + size_t max_buf, offset; + int ret; + u64 offset_codepush; + u32 codepush; + u32 value; + dma_addr_t boot_dma_addr; + bool is_stdalone; + + if (load_type == VK_IMAGE_TYPE_BOOT1) { + /* + * After POR, enable VK soft BOOTSRC so bootrom do not clear + * the pushed image (the TCM memories). + */ + value = vkread32(vk, BAR_0, BAR_BOOTSRC_SELECT); + value |= BOOTSRC_SOFT_ENABLE; + vkwrite32(vk, value, BAR_0, BAR_BOOTSRC_SELECT); + + codepush = CODEPUSH_BOOTSTART + CODEPUSH_BOOT1_ENTRY; + offset_codepush = BAR_CODEPUSH_SBL; + + /* Write a 1 to request SRAM open bit */ + vkwrite32(vk, CODEPUSH_BOOTSTART, BAR_0, offset_codepush); + + /* Wait for VK to respond */ + ret = bcm_vk_wait(vk, BAR_0, BAR_BOOT_STATUS, SRAM_OPEN, + SRAM_OPEN, LOAD_IMAGE_TIMEOUT_MS); + if (ret < 0) { + dev_err(dev, "boot1 wait SRAM err - ret(%d)\n", ret); + goto err_buf_out; + } + + max_buf = SZ_256K; + bufp = dma_alloc_coherent(dev, + max_buf, + &boot_dma_addr, GFP_KERNEL); + if (!bufp) { + dev_err(dev, "Error allocating 0x%zx\n", max_buf); + ret = -ENOMEM; + goto err_buf_out; + } + } else if (load_type == VK_IMAGE_TYPE_BOOT2) { + codepush = CODEPUSH_BOOT2_ENTRY; + offset_codepush = BAR_CODEPUSH_SBI; + + /* Wait for VK to respond */ + ret = bcm_vk_wait(vk, BAR_0, BAR_BOOT_STATUS, DDR_OPEN, + DDR_OPEN, LOAD_IMAGE_TIMEOUT_MS); + if (ret < 0) { + dev_err(dev, "boot2 wait DDR open error - ret(%d)\n", + ret); + goto err_buf_out; + } + + max_buf = SZ_4M; + bufp = dma_alloc_coherent(dev, + max_buf, + &boot_dma_addr, GFP_KERNEL); + if (!bufp) { + dev_err(dev, "Error allocating 0x%zx\n", max_buf); + ret = -ENOMEM; + goto err_buf_out; + } + + bcm_vk_buf_notify(vk, bufp, boot_dma_addr, max_buf); + } else { + dev_err(dev, "Error invalid image type 0x%x\n", load_type); + ret = -EINVAL; + goto err_buf_out; + } + + offset = 0; + ret = request_partial_firmware_into_buf(&fw, filename, dev, + bufp, max_buf, offset); + if (ret) { + dev_err(dev, "Error %d requesting firmware file: %s\n", + ret, filename); + goto err_firmware_out; + } + dev_dbg(dev, "size=0x%zx\n", fw->size); + if (load_type == VK_IMAGE_TYPE_BOOT1) + memcpy_toio(vk->bar[BAR_1] + BAR1_CODEPUSH_BASE_BOOT1, + bufp, + fw->size); + + dev_dbg(dev, "Signaling 0x%x to 0x%llx\n", codepush, offset_codepush); + vkwrite32(vk, codepush, BAR_0, offset_codepush); + + if (load_type == VK_IMAGE_TYPE_BOOT1) { + u32 boot_status; + + /* wait until done */ + ret = bcm_vk_wait(vk, BAR_0, BAR_BOOT_STATUS, + BOOT1_RUNNING, + BOOT1_RUNNING, + BOOT1_STARTUP_TIMEOUT_MS); + + boot_status = vkread32(vk, BAR_0, BAR_BOOT_STATUS); + is_stdalone = !BCM_VK_INTF_IS_DOWN(boot_status) && + (boot_status & BOOT_STDALONE_RUNNING); + if (ret && !is_stdalone) { + dev_err(dev, + "Timeout %ld ms waiting for boot1 to come up - ret(%d)\n", + BOOT1_STARTUP_TIMEOUT_MS, ret); + goto err_firmware_out; + } else if (is_stdalone) { + u32 reg; + + reg = vkread32(vk, BAR_0, BAR_BOOT1_STDALONE_PROGRESS); + if ((reg & BOOT1_STDALONE_PROGRESS_MASK) == + BOOT1_STDALONE_SUCCESS) { + dev_info(dev, "Boot1 standalone success\n"); + ret = 0; + } else { + dev_err(dev, "Timeout %ld ms - Boot1 standalone failure\n", + BOOT1_STARTUP_TIMEOUT_MS); + ret = -EINVAL; + goto err_firmware_out; + } + } + } else if (load_type == VK_IMAGE_TYPE_BOOT2) { + unsigned long timeout; + + timeout = jiffies + msecs_to_jiffies(LOAD_IMAGE_TIMEOUT_MS); + + /* To send more data to VK than max_buf allowed at a time */ + do { + /* + * Check for ack from card. when Ack is received, + * it means all the data is received by card. + * Exit the loop after ack is received. + */ + ret = bcm_vk_wait(vk, BAR_0, BAR_BOOT_STATUS, + FW_LOADER_ACK_RCVD_ALL_DATA, + FW_LOADER_ACK_RCVD_ALL_DATA, + TXFR_COMPLETE_TIMEOUT_MS); + if (ret == 0) { + dev_dbg(dev, "Exit boot2 download\n"); + break; + } else if (ret == -EFAULT) { + dev_err(dev, "Error detected during ACK waiting"); + goto err_firmware_out; + } + + /* exit the loop, if there is no response from card */ + if (time_after(jiffies, timeout)) { + dev_err(dev, "Error. No reply from card\n"); + ret = -ETIMEDOUT; + goto err_firmware_out; + } + + /* Wait for VK to open BAR space to copy new data */ + ret = bcm_vk_wait(vk, BAR_0, offset_codepush, + codepush, 0, + TXFR_COMPLETE_TIMEOUT_MS); + if (ret == 0) { + offset += max_buf; + ret = request_partial_firmware_into_buf + (&fw, + filename, + dev, bufp, + max_buf, + offset); + if (ret) { + dev_err(dev, + "Error %d requesting firmware file: %s offset: 0x%zx\n", + ret, filename, offset); + goto err_firmware_out; + } + dev_dbg(dev, "size=0x%zx\n", fw->size); + dev_dbg(dev, "Signaling 0x%x to 0x%llx\n", + codepush, offset_codepush); + vkwrite32(vk, codepush, BAR_0, offset_codepush); + /* reload timeout after every codepush */ + timeout = jiffies + + msecs_to_jiffies(LOAD_IMAGE_TIMEOUT_MS); + } else if (ret == -EFAULT) { + dev_err(dev, "Error detected waiting for transfer\n"); + goto err_firmware_out; + } + } while (1); + + /* wait for fw status bits to indicate app ready */ + ret = bcm_vk_wait(vk, BAR_0, VK_BAR_FWSTS, + VK_FWSTS_READY, + VK_FWSTS_READY, + BOOT2_STARTUP_TIMEOUT_MS); + if (ret < 0) { + dev_err(dev, "Boot2 not ready - ret(%d)\n", ret); + goto err_firmware_out; + } + + is_stdalone = vkread32(vk, BAR_0, BAR_BOOT_STATUS) & + BOOT_STDALONE_RUNNING; + if (!is_stdalone) { + ret = bcm_vk_intf_ver_chk(vk); + if (ret) { + dev_err(dev, "failure in intf version check\n"); + goto err_firmware_out; + } + + /* + * Next, initialize Message Q if we are loading boot2. + * Do a force sync + */ + ret = bcm_vk_sync_msgq(vk, true); + if (ret) { + dev_err(dev, "Boot2 Error reading comm msg Q info\n"); + ret = -EIO; + goto err_firmware_out; + } + + /* sync & channel other info */ + ret = bcm_vk_sync_card_info(vk); + if (ret) { + dev_err(dev, "Syncing Card Info failure\n"); + goto err_firmware_out; + } + } + } + +err_firmware_out: + release_firmware(fw); + +err_buf_out: + if (bufp) + dma_free_coherent(dev, max_buf, bufp, boot_dma_addr); + + return ret; +} + +static u32 bcm_vk_next_boot_image(struct bcm_vk *vk) +{ + u32 boot_status; + u32 fw_status; + u32 load_type = 0; /* default for unknown */ + + boot_status = vkread32(vk, BAR_0, BAR_BOOT_STATUS); + fw_status = vkread32(vk, BAR_0, VK_BAR_FWSTS); + + if (!BCM_VK_INTF_IS_DOWN(boot_status) && (boot_status & SRAM_OPEN)) + load_type = VK_IMAGE_TYPE_BOOT1; + else if (boot_status == BOOT1_RUNNING) + load_type = VK_IMAGE_TYPE_BOOT2; + + /* Log status so that we know different stages */ + dev_info(&vk->pdev->dev, + "boot-status value for next image: 0x%x : fw-status 0x%x\n", + boot_status, fw_status); + + return load_type; +} + +static enum soc_idx get_soc_idx(struct bcm_vk *vk) +{ + struct pci_dev *pdev = vk->pdev; + enum soc_idx idx = VK_IDX_INVALID; + u32 rev; + static enum soc_idx const vk_soc_tab[] = { VALKYRIE_A0, VALKYRIE_B0 }; + + switch (pdev->device) { + case PCI_DEVICE_ID_VALKYRIE: + /* get the chip id to decide sub-class */ + rev = MAJOR_SOC_REV(vkread32(vk, BAR_0, BAR_CHIP_ID)); + if (rev < ARRAY_SIZE(vk_soc_tab)) { + idx = vk_soc_tab[rev]; + } else { + /* Default to A0 firmware for all other chip revs */ + idx = VALKYRIE_A0; + dev_warn(&pdev->dev, + "Rev %d not in image lookup table, default to idx=%d\n", + rev, idx); + } + break; + + case PCI_DEVICE_ID_VIPER: + idx = VIPER; + break; + + default: + dev_err(&pdev->dev, "no images for 0x%x\n", pdev->device); + } + return idx; +} + +static const char *get_load_fw_name(struct bcm_vk *vk, + const struct load_image_entry *entry) +{ + const struct firmware *fw; + struct device *dev = &vk->pdev->dev; + int ret; + unsigned long dummy; + int i; + + for (i = 0; i < IMG_PER_TYPE_MAX; i++) { + fw = NULL; + ret = request_partial_firmware_into_buf(&fw, + entry->image_name[i], + dev, &dummy, + sizeof(dummy), + 0); + release_firmware(fw); + if (!ret) + return entry->image_name[i]; + } + return NULL; +} + +int bcm_vk_auto_load_all_images(struct bcm_vk *vk) +{ + int i, ret = -1; + enum soc_idx idx; + struct device *dev = &vk->pdev->dev; + u32 curr_type; + const char *curr_name; + + idx = get_soc_idx(vk); + if (idx == VK_IDX_INVALID) + goto auto_load_all_exit; + + /* log a message to know the relative loading order */ + dev_dbg(dev, "Load All for device %d\n", vk->devid); + + for (i = 0; i < NUM_BOOT_STAGES; i++) { + curr_type = image_tab[idx][i].image_type; + if (bcm_vk_next_boot_image(vk) == curr_type) { + curr_name = get_load_fw_name(vk, &image_tab[idx][i]); + if (!curr_name) { + dev_err(dev, "No suitable firmware exists for type %d", + curr_type); + ret = -ENOENT; + goto auto_load_all_exit; + } + ret = bcm_vk_load_image_by_type(vk, curr_type, + curr_name); + dev_info(dev, "Auto load %s, ret %d\n", + curr_name, ret); + + if (ret) { + dev_err(dev, "Error loading default %s\n", + curr_name); + goto auto_load_all_exit; + } + } + } + +auto_load_all_exit: + return ret; +} + +static int bcm_vk_trigger_autoload(struct bcm_vk *vk) +{ + if (test_and_set_bit(BCM_VK_WQ_DWNLD_PEND, vk->wq_offload) != 0) + return -EPERM; + + set_bit(BCM_VK_WQ_DWNLD_AUTO, vk->wq_offload); + queue_work(vk->wq_thread, &vk->wq_work); + + return 0; +} + +/* + * deferred work queue for draining and auto download. + */ +static void bcm_vk_wq_handler(struct work_struct *work) +{ + struct bcm_vk *vk = container_of(work, struct bcm_vk, wq_work); + struct device *dev = &vk->pdev->dev; + s32 ret; + + /* check wq offload bit map to perform various operations */ + if (test_bit(BCM_VK_WQ_NOTF_PEND, vk->wq_offload)) { + /* clear bit right the way for notification */ + clear_bit(BCM_VK_WQ_NOTF_PEND, vk->wq_offload); + bcm_vk_handle_notf(vk); + } + if (test_bit(BCM_VK_WQ_DWNLD_AUTO, vk->wq_offload)) { + bcm_vk_auto_load_all_images(vk); + + /* + * at the end of operation, clear AUTO bit and pending + * bit + */ + clear_bit(BCM_VK_WQ_DWNLD_AUTO, vk->wq_offload); + clear_bit(BCM_VK_WQ_DWNLD_PEND, vk->wq_offload); + } + + /* next, try to drain */ + ret = bcm_to_h_msg_dequeue(vk); + + if (ret == 0) + dev_dbg(dev, "Spurious trigger for workqueue\n"); + else if (ret < 0) + bcm_vk_blk_drv_access(vk); +} + +static long bcm_vk_load_image(struct bcm_vk *vk, + const struct vk_image __user *arg) +{ + struct device *dev = &vk->pdev->dev; + const char *image_name; + struct vk_image image; + u32 next_loadable; + enum soc_idx idx; + int image_idx; + int ret = -EPERM; + + if (copy_from_user(&image, arg, sizeof(image))) + return -EACCES; + + if ((image.type != VK_IMAGE_TYPE_BOOT1) && + (image.type != VK_IMAGE_TYPE_BOOT2)) { + dev_err(dev, "invalid image.type %u\n", image.type); + return ret; + } + + next_loadable = bcm_vk_next_boot_image(vk); + if (next_loadable != image.type) { + dev_err(dev, "Next expected image %u, Loading %u\n", + next_loadable, image.type); + return ret; + } + + /* + * if something is pending download already. This could only happen + * for now when the driver is being loaded, or if someone has issued + * another download command in another shell. + */ + if (test_and_set_bit(BCM_VK_WQ_DWNLD_PEND, vk->wq_offload) != 0) { + dev_err(dev, "Download operation already pending.\n"); + return ret; + } + + image_name = image.filename; + if (image_name[0] == '\0') { + /* Use default image name if NULL */ + idx = get_soc_idx(vk); + if (idx == VK_IDX_INVALID) + goto err_idx; + + /* Image idx starts with boot1 */ + image_idx = image.type - VK_IMAGE_TYPE_BOOT1; + image_name = get_load_fw_name(vk, &image_tab[idx][image_idx]); + if (!image_name) { + dev_err(dev, "No suitable image found for type %d", + image.type); + ret = -ENOENT; + goto err_idx; + } + } else { + /* Ensure filename is NULL terminated */ + image.filename[sizeof(image.filename) - 1] = '\0'; + } + ret = bcm_vk_load_image_by_type(vk, image.type, image_name); + dev_info(dev, "Load %s, ret %d\n", image_name, ret); +err_idx: + clear_bit(BCM_VK_WQ_DWNLD_PEND, vk->wq_offload); + + return ret; +} + +static int bcm_vk_reset_successful(struct bcm_vk *vk) +{ + struct device *dev = &vk->pdev->dev; + u32 fw_status, reset_reason; + int ret = -EAGAIN; + + /* + * Reset could be triggered when the card in several state: + * i) in bootROM + * ii) after boot1 + * iii) boot2 running + * + * i) & ii) - no status bits will be updated. If vkboot1 + * runs automatically after reset, it will update the reason + * to be unknown reason + * iii) - reboot reason match + deinit done. + */ + fw_status = vkread32(vk, BAR_0, VK_BAR_FWSTS); + /* immediate exit if interface goes down */ + if (BCM_VK_INTF_IS_DOWN(fw_status)) { + dev_err(dev, "PCIe Intf Down!\n"); + goto reset_exit; + } + + reset_reason = (fw_status & VK_FWSTS_RESET_REASON_MASK); + if ((reset_reason == VK_FWSTS_RESET_MBOX_DB) || + (reset_reason == VK_FWSTS_RESET_UNKNOWN)) + ret = 0; + + /* + * if some of the deinit bits are set, but done + * bit is not, this is a failure if triggered while boot2 is running + */ + if ((fw_status & VK_FWSTS_DEINIT_TRIGGERED) && + !(fw_status & VK_FWSTS_RESET_DONE)) + ret = -EAGAIN; + +reset_exit: + dev_dbg(dev, "FW status = 0x%x ret %d\n", fw_status, ret); + + return ret; +} + +static void bcm_to_v_reset_doorbell(struct bcm_vk *vk, u32 db_val) +{ + vkwrite32(vk, db_val, BAR_0, VK_BAR0_RESET_DB_BASE); +} + +static int bcm_vk_trigger_reset(struct bcm_vk *vk) +{ + u32 i; + u32 value, boot_status; + bool is_stdalone, is_boot2; + static const u32 bar0_reg_clr_list[] = { BAR_OS_UPTIME, + BAR_INTF_VER, + BAR_CARD_VOLTAGE, + BAR_CARD_TEMPERATURE, + BAR_CARD_PWR_AND_THRE }; + + /* clean up before pressing the door bell */ + bcm_vk_drain_msg_on_reset(vk); + vkwrite32(vk, 0, BAR_1, VK_BAR1_MSGQ_DEF_RDY); + /* make tag '\0' terminated */ + vkwrite32(vk, 0, BAR_1, VK_BAR1_BOOT1_VER_TAG); + + for (i = 0; i < VK_BAR1_DAUTH_MAX; i++) { + vkwrite32(vk, 0, BAR_1, VK_BAR1_DAUTH_STORE_ADDR(i)); + vkwrite32(vk, 0, BAR_1, VK_BAR1_DAUTH_VALID_ADDR(i)); + } + for (i = 0; i < VK_BAR1_SOTP_REVID_MAX; i++) + vkwrite32(vk, 0, BAR_1, VK_BAR1_SOTP_REVID_ADDR(i)); + + memset(&vk->card_info, 0, sizeof(vk->card_info)); + memset(&vk->peerlog_info, 0, sizeof(vk->peerlog_info)); + memset(&vk->proc_mon_info, 0, sizeof(vk->proc_mon_info)); + memset(&vk->alert_cnts, 0, sizeof(vk->alert_cnts)); + + /* + * When boot request fails, the CODE_PUSH_OFFSET stays persistent. + * Allowing us to debug the failure. When we call reset, + * we should clear CODE_PUSH_OFFSET so ROM does not execute + * boot again (and fails again) and instead waits for a new + * codepush. And, if previous boot has encountered error, need + * to clear the entry values + */ + boot_status = vkread32(vk, BAR_0, BAR_BOOT_STATUS); + if (boot_status & BOOT_ERR_MASK) { + dev_info(&vk->pdev->dev, + "Card in boot error 0x%x, clear CODEPUSH val\n", + boot_status); + value = 0; + } else { + value = vkread32(vk, BAR_0, BAR_CODEPUSH_SBL); + value &= CODEPUSH_MASK; + } + vkwrite32(vk, value, BAR_0, BAR_CODEPUSH_SBL); + + /* special reset handling */ + is_stdalone = boot_status & BOOT_STDALONE_RUNNING; + is_boot2 = (boot_status & BOOT_STATE_MASK) == BOOT2_RUNNING; + if (vk->peer_alert.flags & ERR_LOG_RAMDUMP) { + /* + * if card is in ramdump mode, it is hitting an error. Don't + * reset the reboot reason as it will contain valid info that + * is important - simply use special reset + */ + vkwrite32(vk, VK_BAR0_RESET_RAMPDUMP, BAR_0, VK_BAR_FWSTS); + return VK_BAR0_RESET_RAMPDUMP; + } else if (is_stdalone && !is_boot2) { + dev_info(&vk->pdev->dev, "Hard reset on Standalone mode"); + bcm_to_v_reset_doorbell(vk, VK_BAR0_RESET_DB_HARD); + return VK_BAR0_RESET_DB_HARD; + } + + /* reset fw_status with proper reason, and press db */ + vkwrite32(vk, VK_FWSTS_RESET_MBOX_DB, BAR_0, VK_BAR_FWSTS); + bcm_to_v_reset_doorbell(vk, VK_BAR0_RESET_DB_SOFT); + + /* clear other necessary registers and alert records */ + for (i = 0; i < ARRAY_SIZE(bar0_reg_clr_list); i++) + vkwrite32(vk, 0, BAR_0, bar0_reg_clr_list[i]); + memset(&vk->host_alert, 0, sizeof(vk->host_alert)); + memset(&vk->peer_alert, 0, sizeof(vk->peer_alert)); + /* clear 4096 bits of bitmap */ + bitmap_clear(vk->bmap, 0, VK_MSG_ID_BITMAP_SIZE); + + return 0; +} + +static long bcm_vk_reset(struct bcm_vk *vk, struct vk_reset __user *arg) +{ + struct device *dev = &vk->pdev->dev; + struct vk_reset reset; + int ret = 0; + u32 ramdump_reset; + int special_reset; + + if (copy_from_user(&reset, arg, sizeof(struct vk_reset))) + return -EFAULT; + + /* check if any download is in-progress, if so return error */ + if (test_and_set_bit(BCM_VK_WQ_DWNLD_PEND, vk->wq_offload) != 0) { + dev_err(dev, "Download operation pending - skip reset.\n"); + return -EPERM; + } + + ramdump_reset = vk->peer_alert.flags & ERR_LOG_RAMDUMP; + dev_info(dev, "Issue Reset %s\n", + ramdump_reset ? "in ramdump mode" : ""); + + /* + * The following is the sequence of reset: + * - send card level graceful shut down + * - wait enough time for VK to handle its business, stopping DMA etc + * - kill host apps + * - Trigger interrupt with DB + */ + bcm_vk_send_shutdown_msg(vk, VK_SHUTDOWN_GRACEFUL, 0, 0); + + spin_lock(&vk->ctx_lock); + if (!vk->reset_pid) { + vk->reset_pid = task_pid_nr(current); + } else { + dev_err(dev, "Reset already launched by process pid %d\n", + vk->reset_pid); + ret = -EACCES; + } + spin_unlock(&vk->ctx_lock); + if (ret) + goto err_exit; + + bcm_vk_blk_drv_access(vk); + special_reset = bcm_vk_trigger_reset(vk); + + /* + * Wait enough time for card os to deinit + * and populate the reset reason. + */ + msleep(BCM_VK_DEINIT_TIME_MS); + + if (special_reset) { + /* if it is special ramdump reset, return the type to user */ + reset.arg2 = special_reset; + if (copy_to_user(arg, &reset, sizeof(reset))) + ret = -EFAULT; + } else { + ret = bcm_vk_reset_successful(vk); + } + +err_exit: + clear_bit(BCM_VK_WQ_DWNLD_PEND, vk->wq_offload); + return ret; +} + +static int bcm_vk_mmap(struct file *file, struct vm_area_struct *vma) +{ + struct bcm_vk_ctx *ctx = file->private_data; + struct bcm_vk *vk = container_of(ctx->miscdev, struct bcm_vk, miscdev); + unsigned long pg_size; + + /* only BAR2 is mmap possible, which is bar num 4 due to 64bit */ +#define VK_MMAPABLE_BAR 4 + + pg_size = ((pci_resource_len(vk->pdev, VK_MMAPABLE_BAR) - 1) + >> PAGE_SHIFT) + 1; + if (vma->vm_pgoff + vma_pages(vma) > pg_size) + return -EINVAL; + + vma->vm_pgoff += (pci_resource_start(vk->pdev, VK_MMAPABLE_BAR) + >> PAGE_SHIFT); + vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); + + return io_remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff, + vma->vm_end - vma->vm_start, + vma->vm_page_prot); +} + +static long bcm_vk_ioctl(struct file *file, unsigned int cmd, unsigned long arg) +{ + long ret = -EINVAL; + struct bcm_vk_ctx *ctx = file->private_data; + struct bcm_vk *vk = container_of(ctx->miscdev, struct bcm_vk, miscdev); + void __user *argp = (void __user *)arg; + + dev_dbg(&vk->pdev->dev, + "ioctl, cmd=0x%02x, arg=0x%02lx\n", + cmd, arg); + + mutex_lock(&vk->mutex); + + switch (cmd) { + case VK_IOCTL_LOAD_IMAGE: + ret = bcm_vk_load_image(vk, argp); + break; + + case VK_IOCTL_RESET: + ret = bcm_vk_reset(vk, argp); + break; + + default: + break; + } + + mutex_unlock(&vk->mutex); + + return ret; +} + +static const struct file_operations bcm_vk_fops = { + .owner = THIS_MODULE, + .open = bcm_vk_open, + .read = bcm_vk_read, + .write = bcm_vk_write, + .poll = bcm_vk_poll, + .release = bcm_vk_release, + .mmap = bcm_vk_mmap, + .unlocked_ioctl = bcm_vk_ioctl, +}; + +static int bcm_vk_on_panic(struct notifier_block *nb, + unsigned long e, void *p) +{ + struct bcm_vk *vk = container_of(nb, struct bcm_vk, panic_nb); + + bcm_to_v_reset_doorbell(vk, VK_BAR0_RESET_DB_HARD); + + return 0; +} + +static int bcm_vk_probe(struct pci_dev *pdev, const struct pci_device_id *ent) +{ + int err; + int i; + int id; + int irq; + char name[20]; + struct bcm_vk *vk; + struct device *dev = &pdev->dev; + struct miscdevice *misc_device; + u32 boot_status; + + /* allocate vk structure which is tied to kref for freeing */ + vk = kzalloc(sizeof(*vk), GFP_KERNEL); + if (!vk) + return -ENOMEM; + + kref_init(&vk->kref); + if (nr_ib_sgl_blk > BCM_VK_IB_SGL_BLK_MAX) { + dev_warn(dev, "Inband SGL blk %d limited to max %d\n", + nr_ib_sgl_blk, BCM_VK_IB_SGL_BLK_MAX); + nr_ib_sgl_blk = BCM_VK_IB_SGL_BLK_MAX; + } + vk->ib_sgl_size = nr_ib_sgl_blk * VK_MSGQ_BLK_SIZE; + mutex_init(&vk->mutex); + + err = pci_enable_device(pdev); + if (err) { + dev_err(dev, "Cannot enable PCI device\n"); + goto err_free_exit; + } + vk->pdev = pci_dev_get(pdev); + + err = pci_request_regions(pdev, DRV_MODULE_NAME); + if (err) { + dev_err(dev, "Cannot obtain PCI resources\n"); + goto err_disable_pdev; + } + + /* make sure DMA is good */ + err = dma_set_mask_and_coherent(&pdev->dev, + DMA_BIT_MASK(BCM_VK_DMA_BITS)); + if (err) { + dev_err(dev, "failed to set DMA mask\n"); + goto err_disable_pdev; + } + + /* The tdma is a scratch area for some DMA testings. */ + if (nr_scratch_pages) { + vk->tdma_vaddr = dma_alloc_coherent + (dev, + nr_scratch_pages * PAGE_SIZE, + &vk->tdma_addr, GFP_KERNEL); + if (!vk->tdma_vaddr) { + err = -ENOMEM; + goto err_disable_pdev; + } + } + + pci_set_master(pdev); + pci_set_drvdata(pdev, vk); + + irq = pci_alloc_irq_vectors(pdev, + VK_MSIX_IRQ_MIN_REQ, + VK_MSIX_IRQ_MAX, + PCI_IRQ_MSI | PCI_IRQ_MSIX); + + if (irq < VK_MSIX_IRQ_MIN_REQ) { + dev_err(dev, "failed to get min %d MSIX interrupts, irq(%d)\n", + VK_MSIX_IRQ_MIN_REQ, irq); + err = (irq >= 0) ? -EINVAL : irq; + goto err_disable_pdev; + } + + if (irq != VK_MSIX_IRQ_MAX) + dev_warn(dev, "Number of IRQs %d allocated - requested(%d).\n", + irq, VK_MSIX_IRQ_MAX); + + for (i = 0; i < MAX_BAR; i++) { + /* multiple by 2 for 64 bit BAR mapping */ + vk->bar[i] = pci_ioremap_bar(pdev, i * 2); + if (!vk->bar[i]) { + dev_err(dev, "failed to remap BAR%d\n", i); + err = -ENOMEM; + goto err_iounmap; + } + } + + for (vk->num_irqs = 0; + vk->num_irqs < VK_MSIX_MSGQ_MAX; + vk->num_irqs++) { + err = devm_request_irq(dev, pci_irq_vector(pdev, vk->num_irqs), + bcm_vk_msgq_irqhandler, + IRQF_SHARED, DRV_MODULE_NAME, vk); + if (err) { + dev_err(dev, "failed to request msgq IRQ %d for MSIX %d\n", + pdev->irq + vk->num_irqs, vk->num_irqs + 1); + goto err_irq; + } + } + /* one irq for notification from VK */ + err = devm_request_irq(dev, pci_irq_vector(pdev, vk->num_irqs), + bcm_vk_notf_irqhandler, + IRQF_SHARED, DRV_MODULE_NAME, vk); + if (err) { + dev_err(dev, "failed to request notf IRQ %d for MSIX %d\n", + pdev->irq + vk->num_irqs, vk->num_irqs + 1); + goto err_irq; + } + vk->num_irqs++; + + for (i = 0; + (i < VK_MSIX_TTY_MAX) && (vk->num_irqs < irq); + i++, vk->num_irqs++) { + err = devm_request_irq(dev, pci_irq_vector(pdev, vk->num_irqs), + bcm_vk_tty_irqhandler, + IRQF_SHARED, DRV_MODULE_NAME, vk); + if (err) { + dev_err(dev, "failed request tty IRQ %d for MSIX %d\n", + pdev->irq + vk->num_irqs, vk->num_irqs + 1); + goto err_irq; + } + bcm_vk_tty_set_irq_enabled(vk, i); + } + + id = ida_alloc(&bcm_vk_ida, GFP_KERNEL); + if (id < 0) { + err = id; + dev_err(dev, "unable to get id\n"); + goto err_irq; + } + + vk->devid = id; + snprintf(name, sizeof(name), DRV_MODULE_NAME ".%d", id); + misc_device = &vk->miscdev; + misc_device->minor = MISC_DYNAMIC_MINOR; + misc_device->name = kstrdup(name, GFP_KERNEL); + if (!misc_device->name) { + err = -ENOMEM; + goto err_ida_remove; + } + misc_device->fops = &bcm_vk_fops, + + err = misc_register(misc_device); + if (err) { + dev_err(dev, "failed to register device\n"); + goto err_kfree_name; + } + + INIT_WORK(&vk->wq_work, bcm_vk_wq_handler); + + /* create dedicated workqueue */ + vk->wq_thread = create_singlethread_workqueue(name); + if (!vk->wq_thread) { + dev_err(dev, "Fail to create workqueue thread\n"); + err = -ENOMEM; + goto err_misc_deregister; + } + + err = bcm_vk_msg_init(vk); + if (err) { + dev_err(dev, "failed to init msg queue info\n"); + goto err_destroy_workqueue; + } + + /* sync other info */ + bcm_vk_sync_card_info(vk); + + /* register for panic notifier */ + vk->panic_nb.notifier_call = bcm_vk_on_panic; + err = atomic_notifier_chain_register(&panic_notifier_list, + &vk->panic_nb); + if (err) { + dev_err(dev, "Fail to register panic notifier\n"); + goto err_destroy_workqueue; + } + + snprintf(name, sizeof(name), KBUILD_MODNAME ".%d_ttyVK", id); + err = bcm_vk_tty_init(vk, name); + if (err) + goto err_unregister_panic_notifier; + + /* + * lets trigger an auto download. We don't want to do it serially here + * because at probing time, it is not supposed to block for a long time. + */ + boot_status = vkread32(vk, BAR_0, BAR_BOOT_STATUS); + if (auto_load) { + if ((boot_status & BOOT_STATE_MASK) == BROM_RUNNING) { + err = bcm_vk_trigger_autoload(vk); + if (err) + goto err_bcm_vk_tty_exit; + } else { + dev_err(dev, + "Auto-load skipped - BROM not in proper state (0x%x)\n", + boot_status); + } + } + + /* enable hb */ + bcm_vk_hb_init(vk); + + dev_dbg(dev, "BCM-VK:%u created\n", id); + + return 0; + +err_bcm_vk_tty_exit: + bcm_vk_tty_exit(vk); + +err_unregister_panic_notifier: + atomic_notifier_chain_unregister(&panic_notifier_list, + &vk->panic_nb); + +err_destroy_workqueue: + destroy_workqueue(vk->wq_thread); + +err_misc_deregister: + misc_deregister(misc_device); + +err_kfree_name: + kfree(misc_device->name); + misc_device->name = NULL; + +err_ida_remove: + ida_free(&bcm_vk_ida, id); + +err_irq: + for (i = 0; i < vk->num_irqs; i++) + devm_free_irq(dev, pci_irq_vector(pdev, i), vk); + + pci_disable_msix(pdev); + pci_disable_msi(pdev); + +err_iounmap: + for (i = 0; i < MAX_BAR; i++) { + if (vk->bar[i]) + pci_iounmap(pdev, vk->bar[i]); + } + pci_release_regions(pdev); + +err_disable_pdev: + if (vk->tdma_vaddr) + dma_free_coherent(&pdev->dev, nr_scratch_pages * PAGE_SIZE, + vk->tdma_vaddr, vk->tdma_addr); + + pci_free_irq_vectors(pdev); + pci_disable_device(pdev); + pci_dev_put(pdev); + +err_free_exit: + kfree(vk); + + return err; +} + +void bcm_vk_release_data(struct kref *kref) +{ + struct bcm_vk *vk = container_of(kref, struct bcm_vk, kref); + struct pci_dev *pdev = vk->pdev; + + dev_dbg(&pdev->dev, "BCM-VK:%d release data 0x%p\n", vk->devid, vk); + pci_dev_put(pdev); + kfree(vk); +} + +static void bcm_vk_remove(struct pci_dev *pdev) +{ + int i; + struct bcm_vk *vk = pci_get_drvdata(pdev); + struct miscdevice *misc_device = &vk->miscdev; + + bcm_vk_hb_deinit(vk); + + /* + * Trigger a reset to card and wait enough time for UCODE to rerun, + * which re-initialize the card into its default state. + * This ensures when driver is re-enumerated it will start from + * a completely clean state. + */ + bcm_vk_trigger_reset(vk); + usleep_range(BCM_VK_UCODE_BOOT_US, BCM_VK_UCODE_BOOT_MAX_US); + + /* unregister panic notifier */ + atomic_notifier_chain_unregister(&panic_notifier_list, + &vk->panic_nb); + + bcm_vk_msg_remove(vk); + bcm_vk_tty_exit(vk); + + if (vk->tdma_vaddr) + dma_free_coherent(&pdev->dev, nr_scratch_pages * PAGE_SIZE, + vk->tdma_vaddr, vk->tdma_addr); + + /* remove if name is set which means misc dev registered */ + if (misc_device->name) { + misc_deregister(misc_device); + kfree(misc_device->name); + ida_free(&bcm_vk_ida, vk->devid); + } + for (i = 0; i < vk->num_irqs; i++) + devm_free_irq(&pdev->dev, pci_irq_vector(pdev, i), vk); + + pci_disable_msix(pdev); + pci_disable_msi(pdev); + + cancel_work_sync(&vk->wq_work); + destroy_workqueue(vk->wq_thread); + bcm_vk_tty_wq_exit(vk); + + for (i = 0; i < MAX_BAR; i++) { + if (vk->bar[i]) + pci_iounmap(pdev, vk->bar[i]); + } + + dev_dbg(&pdev->dev, "BCM-VK:%d released\n", vk->devid); + + pci_release_regions(pdev); + pci_free_irq_vectors(pdev); + pci_disable_device(pdev); + + kref_put(&vk->kref, bcm_vk_release_data); +} + +static void bcm_vk_shutdown(struct pci_dev *pdev) +{ + struct bcm_vk *vk = pci_get_drvdata(pdev); + u32 reg, boot_stat; + + reg = vkread32(vk, BAR_0, BAR_BOOT_STATUS); + boot_stat = reg & BOOT_STATE_MASK; + + if (boot_stat == BOOT1_RUNNING) { + /* simply trigger a reset interrupt to park it */ + bcm_vk_trigger_reset(vk); + } else if (boot_stat == BROM_NOT_RUN) { + int err; + u16 lnksta; + + /* + * The boot status only reflects boot condition since last reset + * As ucode will run only once to configure pcie, if multiple + * resets happen, we lost track if ucode has run or not. + * Here, read the current link speed and use that to + * sync up the bootstatus properly so that on reboot-back-up, + * it has the proper state to start with autoload + */ + err = pcie_capability_read_word(pdev, PCI_EXP_LNKSTA, &lnksta); + if (!err && + (lnksta & PCI_EXP_LNKSTA_CLS) != PCI_EXP_LNKSTA_CLS_2_5GB) { + reg |= BROM_STATUS_COMPLETE; + vkwrite32(vk, reg, BAR_0, BAR_BOOT_STATUS); + } + } +} + +static const struct pci_device_id bcm_vk_ids[] = { + { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, PCI_DEVICE_ID_VALKYRIE), }, + { } +}; +MODULE_DEVICE_TABLE(pci, bcm_vk_ids); + +static struct pci_driver pci_driver = { + .name = DRV_MODULE_NAME, + .id_table = bcm_vk_ids, + .probe = bcm_vk_probe, + .remove = bcm_vk_remove, + .shutdown = bcm_vk_shutdown, +}; +module_pci_driver(pci_driver); + +MODULE_DESCRIPTION("Broadcom VK Host Driver"); +MODULE_AUTHOR("Scott Branden <scott.branden@broadcom.com>"); +MODULE_LICENSE("GPL v2"); +MODULE_VERSION("1.0"); |