/* * Linux MegaRAID driver for SAS based RAID controllers * * Copyright (c) 2009-2011 LSI Corporation. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * FILE: megaraid_sas_fusion.c * * Authors: LSI Corporation * Sumant Patro * Adam Radford * * Send feedback to: * * Mail to: LSI Corporation, 1621 Barber Lane, Milpitas, CA 95035 * ATTN: Linuxraid */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "megaraid_sas_fusion.h" #include "megaraid_sas.h" extern void megasas_free_cmds(struct megasas_instance *instance); extern struct megasas_cmd *megasas_get_cmd(struct megasas_instance *instance); extern void megasas_complete_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd, u8 alt_status); int megasas_is_ldio(struct scsi_cmnd *cmd); int wait_and_poll(struct megasas_instance *instance, struct megasas_cmd *cmd); void megasas_return_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd); int megasas_alloc_cmds(struct megasas_instance *instance); int megasas_clear_intr_fusion(struct megasas_register_set __iomem *regs); int megasas_issue_polled(struct megasas_instance *instance, struct megasas_cmd *cmd); u8 MR_BuildRaidContext(struct IO_REQUEST_INFO *io_info, struct RAID_CONTEXT *pRAID_Context, struct MR_FW_RAID_MAP_ALL *map); u16 MR_TargetIdToLdGet(u32 ldTgtId, struct MR_FW_RAID_MAP_ALL *map); struct MR_LD_RAID *MR_LdRaidGet(u32 ld, struct MR_FW_RAID_MAP_ALL *map); u16 MR_GetLDTgtId(u32 ld, struct MR_FW_RAID_MAP_ALL *map); void megasas_check_and_restore_queue_depth(struct megasas_instance *instance); u8 MR_ValidateMapInfo(struct MR_FW_RAID_MAP_ALL *map, struct LD_LOAD_BALANCE_INFO *lbInfo); u16 get_updated_dev_handle(struct LD_LOAD_BALANCE_INFO *lbInfo, struct IO_REQUEST_INFO *in_info); int megasas_transition_to_ready(struct megasas_instance *instance, int ocr); void megaraid_sas_kill_hba(struct megasas_instance *instance); extern u32 megasas_dbg_lvl; /** * megasas_enable_intr_fusion - Enables interrupts * @regs: MFI register set */ void megasas_enable_intr_fusion(struct megasas_register_set __iomem *regs) { writel(~MFI_FUSION_ENABLE_INTERRUPT_MASK, &(regs)->outbound_intr_mask); /* Dummy readl to force pci flush */ readl(®s->outbound_intr_mask); } /** * megasas_disable_intr_fusion - Disables interrupt * @regs: MFI register set */ void megasas_disable_intr_fusion(struct megasas_register_set __iomem *regs) { u32 mask = 0xFFFFFFFF; u32 status; writel(mask, ®s->outbound_intr_mask); /* Dummy readl to force pci flush */ status = readl(®s->outbound_intr_mask); } int megasas_clear_intr_fusion(struct megasas_register_set __iomem *regs) { u32 status; /* * Check if it is our interrupt */ status = readl(®s->outbound_intr_status); if (status & 1) { writel(status, ®s->outbound_intr_status); readl(®s->outbound_intr_status); return 1; } if (!(status & MFI_FUSION_ENABLE_INTERRUPT_MASK)) return 0; /* * dummy read to flush PCI */ readl(®s->outbound_intr_status); return 1; } /** * megasas_get_cmd_fusion - Get a command from the free pool * @instance: Adapter soft state * * Returns a free command from the pool */ struct megasas_cmd_fusion *megasas_get_cmd_fusion(struct megasas_instance *instance) { unsigned long flags; struct fusion_context *fusion = (struct fusion_context *)instance->ctrl_context; struct megasas_cmd_fusion *cmd = NULL; spin_lock_irqsave(&fusion->cmd_pool_lock, flags); if (!list_empty(&fusion->cmd_pool)) { cmd = list_entry((&fusion->cmd_pool)->next, struct megasas_cmd_fusion, list); list_del_init(&cmd->list); } else { printk(KERN_ERR "megasas: Command pool (fusion) empty!\n"); } spin_unlock_irqrestore(&fusion->cmd_pool_lock, flags); return cmd; } /** * megasas_return_cmd_fusion - Return a cmd to free command pool * @instance: Adapter soft state * @cmd: Command packet to be returned to free command pool */ static inline void megasas_return_cmd_fusion(struct megasas_instance *instance, struct megasas_cmd_fusion *cmd) { unsigned long flags; struct fusion_context *fusion = (struct fusion_context *)instance->ctrl_context; spin_lock_irqsave(&fusion->cmd_pool_lock, flags); cmd->scmd = NULL; cmd->sync_cmd_idx = (u32)ULONG_MAX; list_add_tail(&cmd->list, &fusion->cmd_pool); spin_unlock_irqrestore(&fusion->cmd_pool_lock, flags); } /** * megasas_teardown_frame_pool_fusion - Destroy the cmd frame DMA pool * @instance: Adapter soft state */ static void megasas_teardown_frame_pool_fusion( struct megasas_instance *instance) { int i; struct fusion_context *fusion = instance->ctrl_context; u16 max_cmd = instance->max_fw_cmds; struct megasas_cmd_fusion *cmd; if (!fusion->sg_dma_pool || !fusion->sense_dma_pool) { printk(KERN_ERR "megasas: dma pool is null. SG Pool %p, " "sense pool : %p\n", fusion->sg_dma_pool, fusion->sense_dma_pool); return; } /* * Return all frames to pool */ for (i = 0; i < max_cmd; i++) { cmd = fusion->cmd_list[i]; if (cmd->sg_frame) pci_pool_free(fusion->sg_dma_pool, cmd->sg_frame, cmd->sg_frame_phys_addr); if (cmd->sense) pci_pool_free(fusion->sense_dma_pool, cmd->sense, cmd->sense_phys_addr); } /* * Now destroy the pool itself */ pci_pool_destroy(fusion->sg_dma_pool); pci_pool_destroy(fusion->sense_dma_pool); fusion->sg_dma_pool = NULL; fusion->sense_dma_pool = NULL; } /** * megasas_free_cmds_fusion - Free all the cmds in the free cmd pool * @instance: Adapter soft state */ void megasas_free_cmds_fusion(struct megasas_instance *instance) { int i; struct fusion_context *fusion = instance->ctrl_context; u32 max_cmds, req_sz, reply_sz, io_frames_sz; req_sz = fusion->request_alloc_sz; reply_sz = fusion->reply_alloc_sz; io_frames_sz = fusion->io_frames_alloc_sz; max_cmds = instance->max_fw_cmds; /* Free descriptors and request Frames memory */ if (fusion->req_frames_desc) dma_free_coherent(&instance->pdev->dev, req_sz, fusion->req_frames_desc, fusion->req_frames_desc_phys); if (fusion->reply_frames_desc) { pci_pool_free(fusion->reply_frames_desc_pool, fusion->reply_frames_desc, fusion->reply_frames_desc_phys); pci_pool_destroy(fusion->reply_frames_desc_pool); } if (fusion->io_request_frames) { pci_pool_free(fusion->io_request_frames_pool, fusion->io_request_frames, fusion->io_request_frames_phys); pci_pool_destroy(fusion->io_request_frames_pool); } /* Free the Fusion frame pool */ megasas_teardown_frame_pool_fusion(instance); /* Free all the commands in the cmd_list */ for (i = 0; i < max_cmds; i++) kfree(fusion->cmd_list[i]); /* Free the cmd_list buffer itself */ kfree(fusion->cmd_list); fusion->cmd_list = NULL; INIT_LIST_HEAD(&fusion->cmd_pool); } /** * megasas_create_frame_pool_fusion - Creates DMA pool for cmd frames * @instance: Adapter soft state * */ static int megasas_create_frame_pool_fusion(struct megasas_instance *instance) { int i; u32 max_cmd; struct fusion_context *fusion; struct megasas_cmd_fusion *cmd; u32 total_sz_chain_frame; fusion = instance->ctrl_context; max_cmd = instance->max_fw_cmds; total_sz_chain_frame = MEGASAS_MAX_SZ_CHAIN_FRAME; /* * Use DMA pool facility provided by PCI layer */ fusion->sg_dma_pool = pci_pool_create("megasas sg pool fusion", instance->pdev, total_sz_chain_frame, 4, 0); if (!fusion->sg_dma_pool) { printk(KERN_DEBUG "megasas: failed to setup request pool " "fusion\n"); return -ENOMEM; } fusion->sense_dma_pool = pci_pool_create("megasas sense pool fusion", instance->pdev, SCSI_SENSE_BUFFERSIZE, 64, 0); if (!fusion->sense_dma_pool) { printk(KERN_DEBUG "megasas: failed to setup sense pool " "fusion\n"); pci_pool_destroy(fusion->sg_dma_pool); fusion->sg_dma_pool = NULL; return -ENOMEM; } /* * Allocate and attach a frame to each of the commands in cmd_list */ for (i = 0; i < max_cmd; i++) { cmd = fusion->cmd_list[i]; cmd->sg_frame = pci_pool_alloc(fusion->sg_dma_pool, GFP_KERNEL, &cmd->sg_frame_phys_addr); cmd->sense = pci_pool_alloc(fusion->sense_dma_pool, GFP_KERNEL, &cmd->sense_phys_addr); /* * megasas_teardown_frame_pool_fusion() takes care of freeing * whatever has been allocated */ if (!cmd->sg_frame || !cmd->sense) { printk(KERN_DEBUG "megasas: pci_pool_alloc failed\n"); megasas_teardown_frame_pool_fusion(instance); return -ENOMEM; } } return 0; } /** * megasas_alloc_cmds_fusion - Allocates the command packets * @instance: Adapter soft state * * * Each frame has a 32-bit field called context. This context is used to get * back the megasas_cmd_fusion from the frame when a frame gets completed * In this driver, the 32 bit values are the indices into an array cmd_list. * This array is used only to look up the megasas_cmd_fusion given the context. * The free commands themselves are maintained in a linked list called cmd_pool. * * cmds are formed in the io_request and sg_frame members of the * megasas_cmd_fusion. The context field is used to get a request descriptor * and is used as SMID of the cmd. * SMID value range is from 1 to max_fw_cmds. */ int megasas_alloc_cmds_fusion(struct megasas_instance *instance) { int i, j; u32 max_cmd, io_frames_sz; struct fusion_context *fusion; struct megasas_cmd_fusion *cmd; union MPI2_REPLY_DESCRIPTORS_UNION *reply_desc; u32 offset; dma_addr_t io_req_base_phys; u8 *io_req_base; fusion = instance->ctrl_context; max_cmd = instance->max_fw_cmds; fusion->req_frames_desc = dma_alloc_coherent(&instance->pdev->dev, fusion->request_alloc_sz, &fusion->req_frames_desc_phys, GFP_KERNEL); if (!fusion->req_frames_desc) { printk(KERN_ERR "megasas; Could not allocate memory for " "request_frames\n"); goto fail_req_desc; } fusion->reply_frames_desc_pool = pci_pool_create("reply_frames pool", instance->pdev, fusion->reply_alloc_sz, 16, 0); if (!fusion->reply_frames_desc_pool) { printk(KERN_ERR "megasas; Could not allocate memory for " "reply_frame pool\n"); goto fail_reply_desc; } fusion->reply_frames_desc = pci_pool_alloc(fusion->reply_frames_desc_pool, GFP_KERNEL, &fusion->reply_frames_desc_phys); if (!fusion->reply_frames_desc) { printk(KERN_ERR "megasas; Could not allocate memory for " "reply_frame pool\n"); pci_pool_destroy(fusion->reply_frames_desc_pool); goto fail_reply_desc; } reply_desc = fusion->reply_frames_desc; for (i = 0; i < fusion->reply_q_depth; i++, reply_desc++) reply_desc->Words = ULLONG_MAX; io_frames_sz = fusion->io_frames_alloc_sz; fusion->io_request_frames_pool = pci_pool_create("io_request_frames pool", instance->pdev, fusion->io_frames_alloc_sz, 16, 0); if (!fusion->io_request_frames_pool) { printk(KERN_ERR "megasas: Could not allocate memory for " "io_request_frame pool\n"); goto fail_io_frames; } fusion->io_request_frames = pci_pool_alloc(fusion->io_request_frames_pool, GFP_KERNEL, &fusion->io_request_frames_phys); if (!fusion->io_request_frames) { printk(KERN_ERR "megasas: Could not allocate memory for " "io_request_frames frames\n"); pci_pool_destroy(fusion->io_request_frames_pool); goto fail_io_frames; } /* * fusion->cmd_list is an array of struct megasas_cmd_fusion pointers. * Allocate the dynamic array first and then allocate individual * commands. */ fusion->cmd_list = kmalloc(sizeof(struct megasas_cmd_fusion *) *max_cmd, GFP_KERNEL); if (!fusion->cmd_list) { printk(KERN_DEBUG "megasas: out of memory. Could not alloc " "memory for cmd_list_fusion\n"); goto fail_cmd_list; } memset(fusion->cmd_list, 0, sizeof(struct megasas_cmd_fusion *) *max_cmd); max_cmd = instance->max_fw_cmds; for (i = 0; i < max_cmd; i++) { fusion->cmd_list[i] = kmalloc(sizeof(struct megasas_cmd_fusion), GFP_KERNEL); if (!fusion->cmd_list[i]) { printk(KERN_ERR "Could not alloc cmd list fusion\n"); for (j = 0; j < i; j++) kfree(fusion->cmd_list[j]); kfree(fusion->cmd_list); fusion->cmd_list = NULL; goto fail_cmd_list; } } /* The first 256 bytes (SMID 0) is not used. Don't add to cmd list */ io_req_base = fusion->io_request_frames + MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE; io_req_base_phys = fusion->io_request_frames_phys + MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE; /* * Add all the commands to command pool (fusion->cmd_pool) */ /* SMID 0 is reserved. Set SMID/index from 1 */ for (i = 0; i < max_cmd; i++) { cmd = fusion->cmd_list[i]; offset = MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE * i; memset(cmd, 0, sizeof(struct megasas_cmd_fusion)); cmd->index = i + 1; cmd->scmd = NULL; cmd->sync_cmd_idx = (u32)ULONG_MAX; /* Set to Invalid */ cmd->instance = instance; cmd->io_request = (struct MPI2_RAID_SCSI_IO_REQUEST *) (io_req_base + offset); memset(cmd->io_request, 0, sizeof(struct MPI2_RAID_SCSI_IO_REQUEST)); cmd->io_request_phys_addr = io_req_base_phys + offset; list_add_tail(&cmd->list, &fusion->cmd_pool); } /* * Create a frame pool and assign one frame to each cmd */ if (megasas_create_frame_pool_fusion(instance)) { printk(KERN_DEBUG "megasas: Error creating frame DMA pool\n"); megasas_free_cmds_fusion(instance); goto fail_req_desc; } return 0; fail_cmd_list: pci_pool_free(fusion->io_request_frames_pool, fusion->io_request_frames, fusion->io_request_frames_phys); pci_pool_destroy(fusion->io_request_frames_pool); fail_io_frames: dma_free_coherent(&instance->pdev->dev, fusion->request_alloc_sz, fusion->reply_frames_desc, fusion->reply_frames_desc_phys); pci_pool_free(fusion->reply_frames_desc_pool, fusion->reply_frames_desc, fusion->reply_frames_desc_phys); pci_pool_destroy(fusion->reply_frames_desc_pool); fail_reply_desc: dma_free_coherent(&instance->pdev->dev, fusion->request_alloc_sz, fusion->req_frames_desc, fusion->req_frames_desc_phys); fail_req_desc: return -ENOMEM; } /** * wait_and_poll - Issues a polling command * @instance: Adapter soft state * @cmd: Command packet to be issued * * For polling, MFI requires the cmd_status to be set to 0xFF before posting. */ int wait_and_poll(struct megasas_instance *instance, struct megasas_cmd *cmd) { int i; struct megasas_header *frame_hdr = &cmd->frame->hdr; u32 msecs = MFI_POLL_TIMEOUT_SECS * 1000; /* * Wait for cmd_status to change */ for (i = 0; (i < msecs) && (frame_hdr->cmd_status == 0xff); i += 20) { rmb(); msleep(20); } if (frame_hdr->cmd_status == 0xff) return -ETIME; return 0; } /** * megasas_ioc_init_fusion - Initializes the FW * @instance: Adapter soft state * * Issues the IOC Init cmd */ int megasas_ioc_init_fusion(struct megasas_instance *instance) { struct megasas_init_frame *init_frame; struct MPI2_IOC_INIT_REQUEST *IOCInitMessage; dma_addr_t ioc_init_handle; u32 context; struct megasas_cmd *cmd; u8 ret; struct fusion_context *fusion; union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc; int i; struct megasas_header *frame_hdr; fusion = instance->ctrl_context; cmd = megasas_get_cmd(instance); if (!cmd) { printk(KERN_ERR "Could not allocate cmd for INIT Frame\n"); ret = 1; goto fail_get_cmd; } IOCInitMessage = dma_alloc_coherent(&instance->pdev->dev, sizeof(struct MPI2_IOC_INIT_REQUEST), &ioc_init_handle, GFP_KERNEL); if (!IOCInitMessage) { printk(KERN_ERR "Could not allocate memory for " "IOCInitMessage\n"); ret = 1; goto fail_fw_init; } memset(IOCInitMessage, 0, sizeof(struct MPI2_IOC_INIT_REQUEST)); IOCInitMessage->Function = MPI2_FUNCTION_IOC_INIT; IOCInitMessage->WhoInit = MPI2_WHOINIT_HOST_DRIVER; IOCInitMessage->MsgVersion = MPI2_VERSION; IOCInitMessage->HeaderVersion = MPI2_HEADER_VERSION; IOCInitMessage->SystemRequestFrameSize = MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE / 4; IOCInitMessage->ReplyDescriptorPostQueueDepth = fusion->reply_q_depth; IOCInitMessage->ReplyDescriptorPostQueueAddress = fusion->reply_frames_desc_phys; IOCInitMessage->SystemRequestFrameBaseAddress = fusion->io_request_frames_phys; init_frame = (struct megasas_init_frame *)cmd->frame; memset(init_frame, 0, MEGAMFI_FRAME_SIZE); frame_hdr = &cmd->frame->hdr; context = init_frame->context; init_frame->context = context; frame_hdr->cmd_status = 0xFF; frame_hdr->flags |= MFI_FRAME_DONT_POST_IN_REPLY_QUEUE; init_frame->cmd = MFI_CMD_INIT; init_frame->cmd_status = 0xFF; init_frame->queue_info_new_phys_addr_lo = ioc_init_handle; init_frame->data_xfer_len = sizeof(struct MPI2_IOC_INIT_REQUEST); req_desc = (union MEGASAS_REQUEST_DESCRIPTOR_UNION *)fusion->req_frames_desc; req_desc->Words = cmd->frame_phys_addr; req_desc->MFAIo.RequestFlags = (MEGASAS_REQ_DESCRIPT_FLAGS_MFA << MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT); /* * disable the intr before firing the init frame */ instance->instancet->disable_intr(instance->reg_set); for (i = 0; i < (10 * 1000); i += 20) { if (readl(&instance->reg_set->doorbell) & 1) msleep(20); else break; } instance->instancet->fire_cmd(instance, req_desc->u.low, req_desc->u.high, instance->reg_set); wait_and_poll(instance, cmd); frame_hdr = &cmd->frame->hdr; if (frame_hdr->cmd_status != 0) { ret = 1; goto fail_fw_init; } printk(KERN_ERR "megasas:IOC Init cmd success\n"); ret = 0; fail_fw_init: megasas_return_cmd(instance, cmd); if (IOCInitMessage) dma_free_coherent(&instance->pdev->dev, sizeof(struct MPI2_IOC_INIT_REQUEST), IOCInitMessage, ioc_init_handle); fail_get_cmd: return ret; } /* * megasas_get_ld_map_info - Returns FW's ld_map structure * @instance: Adapter soft state * @pend: Pend the command or not * Issues an internal command (DCMD) to get the FW's controller PD * list structure. This information is mainly used to find out SYSTEM * supported by the FW. */ static int megasas_get_ld_map_info(struct megasas_instance *instance) { int ret = 0; struct megasas_cmd *cmd; struct megasas_dcmd_frame *dcmd; struct MR_FW_RAID_MAP_ALL *ci; dma_addr_t ci_h = 0; u32 size_map_info; struct fusion_context *fusion; cmd = megasas_get_cmd(instance); if (!cmd) { printk(KERN_DEBUG "megasas: Failed to get cmd for map info.\n"); return -ENOMEM; } fusion = instance->ctrl_context; if (!fusion) { megasas_return_cmd(instance, cmd); return 1; } dcmd = &cmd->frame->dcmd; size_map_info = sizeof(struct MR_FW_RAID_MAP) + (sizeof(struct MR_LD_SPAN_MAP) *(MAX_LOGICAL_DRIVES - 1)); ci = fusion->ld_map[(instance->map_id & 1)]; ci_h = fusion->ld_map_phys[(instance->map_id & 1)]; if (!ci) { printk(KERN_DEBUG "Failed to alloc mem for ld_map_info\n"); megasas_return_cmd(instance, cmd); return -ENOMEM; } memset(ci, 0, sizeof(*ci)); memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE); dcmd->cmd = MFI_CMD_DCMD; dcmd->cmd_status = 0xFF; dcmd->sge_count = 1; dcmd->flags = MFI_FRAME_DIR_READ; dcmd->timeout = 0; dcmd->pad_0 = 0; dcmd->data_xfer_len = size_map_info; dcmd->opcode = MR_DCMD_LD_MAP_GET_INFO; dcmd->sgl.sge32[0].phys_addr = ci_h; dcmd->sgl.sge32[0].length = size_map_info; if (!megasas_issue_polled(instance, cmd)) ret = 0; else { printk(KERN_ERR "megasas: Get LD Map Info Failed\n"); ret = -1; } megasas_return_cmd(instance, cmd); return ret; } u8 megasas_get_map_info(struct megasas_instance *instance) { struct fusion_context *fusion = instance->ctrl_context; fusion->fast_path_io = 0; if (!megasas_get_ld_map_info(instance)) { if (MR_ValidateMapInfo(fusion->ld_map[(instance->map_id & 1)], fusion->load_balance_info)) { fusion->fast_path_io = 1; return 0; } } return 1; } /* * megasas_sync_map_info - Returns FW's ld_map structure * @instance: Adapter soft state * * Issues an internal command (DCMD) to get the FW's controller PD * list structure. This information is mainly used to find out SYSTEM * supported by the FW. */ int megasas_sync_map_info(struct megasas_instance *instance) { int ret = 0, i; struct megasas_cmd *cmd; struct megasas_dcmd_frame *dcmd; u32 size_sync_info, num_lds; struct fusion_context *fusion; struct MR_LD_TARGET_SYNC *ci = NULL; struct MR_FW_RAID_MAP_ALL *map; struct MR_LD_RAID *raid; struct MR_LD_TARGET_SYNC *ld_sync; dma_addr_t ci_h = 0; u32 size_map_info; cmd = megasas_get_cmd(instance); if (!cmd) { printk(KERN_DEBUG "megasas: Failed to get cmd for sync" "info.\n"); return -ENOMEM; } fusion = instance->ctrl_context; if (!fusion) { megasas_return_cmd(instance, cmd); return 1; } map = fusion->ld_map[instance->map_id & 1]; num_lds = map->raidMap.ldCount; dcmd = &cmd->frame->dcmd; size_sync_info = sizeof(struct MR_LD_TARGET_SYNC) *num_lds; memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE); ci = (struct MR_LD_TARGET_SYNC *) fusion->ld_map[(instance->map_id - 1) & 1]; memset(ci, 0, sizeof(struct MR_FW_RAID_MAP_ALL)); ci_h = fusion->ld_map_phys[(instance->map_id - 1) & 1]; ld_sync = (struct MR_LD_TARGET_SYNC *)ci; for (i = 0; i < num_lds; i++, ld_sync++) { raid = MR_LdRaidGet(i, map); ld_sync->targetId = MR_GetLDTgtId(i, map); ld_sync->seqNum = raid->seqNum; } size_map_info = sizeof(struct MR_FW_RAID_MAP) + (sizeof(struct MR_LD_SPAN_MAP) *(MAX_LOGICAL_DRIVES - 1)); dcmd->cmd = MFI_CMD_DCMD; dcmd->cmd_status = 0xFF; dcmd->sge_count = 1; dcmd->flags = MFI_FRAME_DIR_WRITE; dcmd->timeout = 0; dcmd->pad_0 = 0; dcmd->data_xfer_len = size_map_info; dcmd->mbox.b[0] = num_lds; dcmd->mbox.b[1] = MEGASAS_DCMD_MBOX_PEND_FLAG; dcmd->opcode = MR_DCMD_LD_MAP_GET_INFO; dcmd->sgl.sge32[0].phys_addr = ci_h; dcmd->sgl.sge32[0].length = size_map_info; instance->map_update_cmd = cmd; instance->instancet->issue_dcmd(instance, cmd); return ret; } /** * megasas_init_adapter_fusion - Initializes the FW * @instance: Adapter soft state * * This is the main function for initializing firmware. */ u32 megasas_init_adapter_fusion(struct megasas_instance *instance) { struct megasas_register_set __iomem *reg_set; struct fusion_context *fusion; u32 max_cmd; int i = 0; fusion = instance->ctrl_context; reg_set = instance->reg_set; /* * Get various operational parameters from status register */ instance->max_fw_cmds = instance->instancet->read_fw_status_reg(reg_set) & 0x00FFFF; instance->max_fw_cmds = min(instance->max_fw_cmds, (u16)1008); /* * Reduce the max supported cmds by 1. This is to ensure that the * reply_q_sz (1 more than the max cmd that driver may send) * does not exceed max cmds that the FW can support */ instance->max_fw_cmds = instance->max_fw_cmds-1; /* Only internal cmds (DCMD) need to have MFI frames */ instance->max_mfi_cmds = MEGASAS_INT_CMDS; max_cmd = instance->max_fw_cmds; fusion->reply_q_depth = ((max_cmd + 1 + 15)/16)*16; fusion->request_alloc_sz = sizeof(union MEGASAS_REQUEST_DESCRIPTOR_UNION) *max_cmd; fusion->reply_alloc_sz = sizeof(union MPI2_REPLY_DESCRIPTORS_UNION) *(fusion->reply_q_depth); fusion->io_frames_alloc_sz = MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE + (MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE * (max_cmd + 1)); /* Extra 1 for SMID 0 */ fusion->max_sge_in_main_msg = (MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE - offsetof(struct MPI2_RAID_SCSI_IO_REQUEST, SGL))/16; fusion->max_sge_in_chain = MEGASAS_MAX_SZ_CHAIN_FRAME / sizeof(union MPI2_SGE_IO_UNION); instance->max_num_sge = fusion->max_sge_in_main_msg + fusion->max_sge_in_chain - 2; /* Used for pass thru MFI frame (DCMD) */ fusion->chain_offset_mfi_pthru = offsetof(struct MPI2_RAID_SCSI_IO_REQUEST, SGL)/16; fusion->chain_offset_io_request = (MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE - sizeof(union MPI2_SGE_IO_UNION))/16; fusion->last_reply_idx = 0; /* * Allocate memory for descriptors * Create a pool of commands */ if (megasas_alloc_cmds(instance)) goto fail_alloc_mfi_cmds; if (megasas_alloc_cmds_fusion(instance)) goto fail_alloc_cmds; if (megasas_ioc_init_fusion(instance)) goto fail_ioc_init; instance->flag_ieee = 1; fusion->map_sz = sizeof(struct MR_FW_RAID_MAP) + (sizeof(struct MR_LD_SPAN_MAP) *(MAX_LOGICAL_DRIVES - 1)); fusion->fast_path_io = 0; for (i = 0; i < 2; i++) { fusion->ld_map[i] = dma_alloc_coherent(&instance->pdev->dev, fusion->map_sz, &fusion->ld_map_phys[i], GFP_KERNEL); if (!fusion->ld_map[i]) { printk(KERN_ERR "megasas: Could not allocate memory " "for map info\n"); goto fail_map_info; } } if (!megasas_get_map_info(instance)) megasas_sync_map_info(instance); return 0; fail_map_info: if (i == 1) dma_free_coherent(&instance->pdev->dev, fusion->map_sz, fusion->ld_map[0], fusion->ld_map_phys[0]); fail_ioc_init: megasas_free_cmds_fusion(instance); fail_alloc_cmds: megasas_free_cmds(instance); fail_alloc_mfi_cmds: return 1; } /** * megasas_fire_cmd_fusion - Sends command to the FW * @frame_phys_addr : Physical address of cmd * @frame_count : Number of frames for the command * @regs : MFI register set */ void megasas_fire_cmd_fusion(struct megasas_instance *instance, dma_addr_t req_desc_lo, u32 req_desc_hi, struct megasas_register_set __iomem *regs) { unsigned long flags; spin_lock_irqsave(&instance->hba_lock, flags); writel(req_desc_lo, &(regs)->inbound_low_queue_port); writel(req_desc_hi, &(regs)->inbound_high_queue_port); spin_unlock_irqrestore(&instance->hba_lock, flags); } /** * map_cmd_status - Maps FW cmd status to OS cmd status * @cmd : Pointer to cmd * @status : status of cmd returned by FW * @ext_status : ext status of cmd returned by FW */ void map_cmd_status(struct megasas_cmd_fusion *cmd, u8 status, u8 ext_status) { switch (status) { case MFI_STAT_OK: cmd->scmd->result = DID_OK << 16; break; case MFI_STAT_SCSI_IO_FAILED: case MFI_STAT_LD_INIT_IN_PROGRESS: cmd->scmd->result = (DID_ERROR << 16) | ext_status; break; case MFI_STAT_SCSI_DONE_WITH_ERROR: cmd->scmd->result = (DID_OK << 16) | ext_status; if (ext_status == SAM_STAT_CHECK_CONDITION) { memset(cmd->scmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); memcpy(cmd->scmd->sense_buffer, cmd->sense, SCSI_SENSE_BUFFERSIZE); cmd->scmd->result |= DRIVER_SENSE << 24; } break; case MFI_STAT_LD_OFFLINE: case MFI_STAT_DEVICE_NOT_FOUND: cmd->scmd->result = DID_BAD_TARGET << 16; break; default: printk(KERN_DEBUG "megasas: FW status %#x\n", status); cmd->scmd->result = DID_ERROR << 16; break; } } /** * megasas_make_sgl_fusion - Prepares 32-bit SGL * @instance: Adapter soft state * @scp: SCSI command from the mid-layer * @sgl_ptr: SGL to be filled in * @cmd: cmd we are working on * * If successful, this function returns the number of SG elements. */ static int megasas_make_sgl_fusion(struct megasas_instance *instance, struct scsi_cmnd *scp, struct MPI25_IEEE_SGE_CHAIN64 *sgl_ptr, struct megasas_cmd_fusion *cmd) { int i, sg_processed; int sge_count, sge_idx; struct scatterlist *os_sgl; struct fusion_context *fusion; fusion = instance->ctrl_context; cmd->io_request->ChainOffset = 0; sge_count = scsi_dma_map(scp); BUG_ON(sge_count < 0); if (sge_count > instance->max_num_sge || !sge_count) return sge_count; if (sge_count > fusion->max_sge_in_main_msg) { /* One element to store the chain info */ sge_idx = fusion->max_sge_in_main_msg - 1; } else sge_idx = sge_count; scsi_for_each_sg(scp, os_sgl, sge_count, i) { sgl_ptr->Length = sg_dma_len(os_sgl); sgl_ptr->Address = sg_dma_address(os_sgl); sgl_ptr->Flags = 0; sgl_ptr++; sg_processed = i + 1; if ((sg_processed == (fusion->max_sge_in_main_msg - 1)) && (sge_count > fusion->max_sge_in_main_msg)) { struct MPI25_IEEE_SGE_CHAIN64 *sg_chain; cmd->io_request->ChainOffset = fusion->chain_offset_io_request; sg_chain = sgl_ptr; /* Prepare chain element */ sg_chain->NextChainOffset = 0; sg_chain->Flags = (IEEE_SGE_FLAGS_CHAIN_ELEMENT | MPI2_IEEE_SGE_FLAGS_IOCPLBNTA_ADDR); sg_chain->Length = (sizeof(union MPI2_SGE_IO_UNION) *(sge_count - sg_processed)); sg_chain->Address = cmd->sg_frame_phys_addr; sgl_ptr = (struct MPI25_IEEE_SGE_CHAIN64 *)cmd->sg_frame; } } return sge_count; } /** * megasas_set_pd_lba - Sets PD LBA * @cdb: CDB * @cdb_len: cdb length * @start_blk: Start block of IO * * Used to set the PD LBA in CDB for FP IOs */ void megasas_set_pd_lba(struct MPI2_RAID_SCSI_IO_REQUEST *io_request, u8 cdb_len, struct IO_REQUEST_INFO *io_info, struct scsi_cmnd *scp, struct MR_FW_RAID_MAP_ALL *local_map_ptr, u32 ref_tag) { struct MR_LD_RAID *raid; u32 ld; u64 start_blk = io_info->pdBlock; u8 *cdb = io_request->CDB.CDB32; u32 num_blocks = io_info->numBlocks; u8 opcode = 0, flagvals = 0, groupnum = 0, control = 0; /* Check if T10 PI (DIF) is enabled for this LD */ ld = MR_TargetIdToLdGet(io_info->ldTgtId, local_map_ptr); raid = MR_LdRaidGet(ld, local_map_ptr); if (raid->capability.ldPiMode == MR_PROT_INFO_TYPE_CONTROLLER) { memset(cdb, 0, sizeof(io_request->CDB.CDB32)); cdb[0] = MEGASAS_SCSI_VARIABLE_LENGTH_CMD; cdb[7] = MEGASAS_SCSI_ADDL_CDB_LEN; if (scp->sc_data_direction == PCI_DMA_FROMDEVICE) cdb[9] = MEGASAS_SCSI_SERVICE_ACTION_READ32; else cdb[9] = MEGASAS_SCSI_SERVICE_ACTION_WRITE32; cdb[10] = MEGASAS_RD_WR_PROTECT_CHECK_ALL; /* LBA */ cdb[12] = (u8)((start_blk >> 56) & 0xff); cdb[13] = (u8)((start_blk >> 48) & 0xff); cdb[14] = (u8)((start_blk >> 40) & 0xff); cdb[15] = (u8)((start_blk >> 32) & 0xff); cdb[16] = (u8)((start_blk >> 24) & 0xff); cdb[17] = (u8)((start_blk >> 16) & 0xff); cdb[18] = (u8)((start_blk >> 8) & 0xff); cdb[19] = (u8)(start_blk & 0xff); /* Logical block reference tag */ io_request->CDB.EEDP32.PrimaryReferenceTag = cpu_to_be32(ref_tag); io_request->CDB.EEDP32.PrimaryApplicationTagMask = 0xffff; io_request->DataLength = num_blocks * 512; io_request->IoFlags = 32; /* Specify 32-byte cdb */ /* Transfer length */ cdb[28] = (u8)((num_blocks >> 24) & 0xff); cdb[29] = (u8)((num_blocks >> 16) & 0xff); cdb[30] = (u8)((num_blocks >> 8) & 0xff); cdb[31] = (u8)(num_blocks & 0xff); /* set SCSI IO EEDPFlags */ if (scp->sc_data_direction == PCI_DMA_FROMDEVICE) { io_request->EEDPFlags = MPI2_SCSIIO_EEDPFLAGS_INC_PRI_REFTAG | MPI2_SCSIIO_EEDPFLAGS_CHECK_REFTAG | MPI2_SCSIIO_EEDPFLAGS_CHECK_REMOVE_OP | MPI2_SCSIIO_EEDPFLAGS_CHECK_APPTAG | MPI2_SCSIIO_EEDPFLAGS_CHECK_GUARD; } else { io_request->EEDPFlags = MPI2_SCSIIO_EEDPFLAGS_INC_PRI_REFTAG | MPI2_SCSIIO_EEDPFLAGS_INSERT_OP; } io_request->Control |= (0x4 << 26); io_request->EEDPBlockSize = MEGASAS_EEDPBLOCKSIZE; } else { /* Some drives don't support 16/12 byte CDB's, convert to 10 */ if (((cdb_len == 12) || (cdb_len == 16)) && (start_blk <= 0xffffffff)) { if (cdb_len == 16) { opcode = cdb[0] == READ_16 ? READ_10 : WRITE_10; flagvals = cdb[1]; groupnum = cdb[14]; control = cdb[15]; } else { opcode = cdb[0] == READ_12 ? READ_10 : WRITE_10; flagvals = cdb[1]; groupnum = cdb[10]; control = cdb[11]; } memset(cdb, 0, sizeof(io_request->CDB.CDB32)); cdb[0] = opcode; cdb[1] = flagvals; cdb[6] = groupnum; cdb[9] = control; /* Transfer length */ cdb[8] = (u8)(num_blocks & 0xff); cdb[7] = (u8)((num_blocks >> 8) & 0xff); io_request->IoFlags = 10; /* Specify 10-byte cdb */ cdb_len = 10; } else if ((cdb_len < 16) && (start_blk > 0xffffffff)) { /* Convert to 16 byte CDB for large LBA's */ switch (cdb_len) { case 6: opcode = cdb[0] == READ_6 ? READ_16 : WRITE_16; control = cdb[5]; break; case 10: opcode = cdb[0] == READ_10 ? READ_16 : WRITE_16; flagvals = cdb[1]; groupnum = cdb[6]; control = cdb[9]; break; case 12: opcode = cdb[0] == READ_12 ? READ_16 : WRITE_16; flagvals = cdb[1]; groupnum = cdb[10]; control = cdb[11]; break; } memset(cdb, 0, sizeof(io_request->CDB.CDB32)); cdb[0] = opcode; cdb[1] = flagvals; cdb[14] = groupnum; cdb[15] = control; /* Transfer length */ cdb[13] = (u8)(num_blocks & 0xff); cdb[12] = (u8)((num_blocks >> 8) & 0xff); cdb[11] = (u8)((num_blocks >> 16) & 0xff); cdb[10] = (u8)((num_blocks >> 24) & 0xff); io_request->IoFlags = 16; /* Specify 16-byte cdb */ cdb_len = 16; } /* Normal case, just load LBA here */ switch (cdb_len) { case 6: { u8 val = cdb[1] & 0xE0; cdb[3] = (u8)(start_blk & 0xff); cdb[2] = (u8)((start_blk >> 8) & 0xff); cdb[1] = val | ((u8)(start_blk >> 16) & 0x1f); break; } case 10: cdb[5] = (u8)(start_blk & 0xff); cdb[4] = (u8)((start_blk >> 8) & 0xff); cdb[3] = (u8)((start_blk >> 16) & 0xff); cdb[2] = (u8)((start_blk >> 24) & 0xff); break; case 12: cdb[5] = (u8)(start_blk & 0xff); cdb[4] = (u8)((start_blk >> 8) & 0xff); cdb[3] = (u8)((start_blk >> 16) & 0xff); cdb[2] = (u8)((start_blk >> 24) & 0xff); break; case 16: cdb[9] = (u8)(start_blk & 0xff); cdb[8] = (u8)((start_blk >> 8) & 0xff); cdb[7] = (u8)((start_blk >> 16) & 0xff); cdb[6] = (u8)((start_blk >> 24) & 0xff); cdb[5] = (u8)((start_blk >> 32) & 0xff); cdb[4] = (u8)((start_blk >> 40) & 0xff); cdb[3] = (u8)((start_blk >> 48) & 0xff); cdb[2] = (u8)((start_blk >> 56) & 0xff); break; } } } /** * megasas_build_ldio_fusion - Prepares IOs to devices * @instance: Adapter soft state * @scp: SCSI command * @cmd: Command to be prepared * * Prepares the io_request and chain elements (sg_frame) for IO * The IO can be for PD (Fast Path) or LD */ void megasas_build_ldio_fusion(struct megasas_instance *instance, struct scsi_cmnd *scp, struct megasas_cmd_fusion *cmd) { u8 fp_possible; u32 start_lba_lo, start_lba_hi, device_id; struct MPI2_RAID_SCSI_IO_REQUEST *io_request; union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc; struct IO_REQUEST_INFO io_info; struct fusion_context *fusion; struct MR_FW_RAID_MAP_ALL *local_map_ptr; device_id = MEGASAS_DEV_INDEX(instance, scp); fusion = instance->ctrl_context; io_request = cmd->io_request; io_request->RaidContext.VirtualDiskTgtId = device_id; io_request->RaidContext.status = 0; io_request->RaidContext.exStatus = 0; req_desc = (union MEGASAS_REQUEST_DESCRIPTOR_UNION *)cmd->request_desc; start_lba_lo = 0; start_lba_hi = 0; fp_possible = 0; /* * 6-byte READ(0x08) or WRITE(0x0A) cdb */ if (scp->cmd_len == 6) { io_request->DataLength = (u32) scp->cmnd[4]; start_lba_lo = ((u32) scp->cmnd[1] << 16) | ((u32) scp->cmnd[2] << 8) | (u32) scp->cmnd[3]; start_lba_lo &= 0x1FFFFF; } /* * 10-byte READ(0x28) or WRITE(0x2A) cdb */ else if (scp->cmd_len == 10) { io_request->DataLength = (u32) scp->cmnd[8] | ((u32) scp->cmnd[7] << 8); start_lba_lo = ((u32) scp->cmnd[2] << 24) | ((u32) scp->cmnd[3] << 16) | ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5]; } /* * 12-byte READ(0xA8) or WRITE(0xAA) cdb */ else if (scp->cmd_len == 12) { io_request->DataLength = ((u32) scp->cmnd[6] << 24) | ((u32) scp->cmnd[7] << 16) | ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9]; start_lba_lo = ((u32) scp->cmnd[2] << 24) | ((u32) scp->cmnd[3] << 16) | ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5]; } /* * 16-byte READ(0x88) or WRITE(0x8A) cdb */ else if (scp->cmd_len == 16) { io_request->DataLength = ((u32) scp->cmnd[10] << 24) | ((u32) scp->cmnd[11] << 16) | ((u32) scp->cmnd[12] << 8) | (u32) scp->cmnd[13]; start_lba_lo = ((u32) scp->cmnd[6] << 24) | ((u32) scp->cmnd[7] << 16) | ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9]; start_lba_hi = ((u32) scp->cmnd[2] << 24) | ((u32) scp->cmnd[3] << 16) | ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5]; } memset(&io_info, 0, sizeof(struct IO_REQUEST_INFO)); io_info.ldStartBlock = ((u64)start_lba_hi << 32) | start_lba_lo; io_info.numBlocks = io_request->DataLength; io_info.ldTgtId = device_id; if (scp->sc_data_direction == PCI_DMA_FROMDEVICE) io_info.isRead = 1; local_map_ptr = fusion->ld_map[(instance->map_id & 1)]; if ((MR_TargetIdToLdGet(device_id, local_map_ptr) >= MAX_LOGICAL_DRIVES) || (!fusion->fast_path_io)) { io_request->RaidContext.regLockFlags = 0; fp_possible = 0; } else { if (MR_BuildRaidContext(&io_info, &io_request->RaidContext, local_map_ptr)) fp_possible = io_info.fpOkForIo; } if (fp_possible) { megasas_set_pd_lba(io_request, scp->cmd_len, &io_info, scp, local_map_ptr, start_lba_lo); io_request->DataLength = scsi_bufflen(scp); io_request->Function = MPI2_FUNCTION_SCSI_IO_REQUEST; cmd->request_desc->SCSIIO.RequestFlags = (MPI2_REQ_DESCRIPT_FLAGS_HIGH_PRIORITY << MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT); if ((fusion->load_balance_info[device_id].loadBalanceFlag) && (io_info.isRead)) { io_info.devHandle = get_updated_dev_handle( &fusion->load_balance_info[device_id], &io_info); scp->SCp.Status |= MEGASAS_LOAD_BALANCE_FLAG; } else scp->SCp.Status &= ~MEGASAS_LOAD_BALANCE_FLAG; cmd->request_desc->SCSIIO.DevHandle = io_info.devHandle; io_request->DevHandle = io_info.devHandle; } else { io_request->RaidContext.timeoutValue = local_map_ptr->raidMap.fpPdIoTimeoutSec; io_request->Function = MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST; io_request->DevHandle = device_id; cmd->request_desc->SCSIIO.RequestFlags = (MEGASAS_REQ_DESCRIPT_FLAGS_LD_IO << MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT); } /* Not FP */ } /** * megasas_build_dcdb_fusion - Prepares IOs to devices * @instance: Adapter soft state * @scp: SCSI command * @cmd: Command to be prepared * * Prepares the io_request frame for non-io cmds */ static void megasas_build_dcdb_fusion(struct megasas_instance *instance, struct scsi_cmnd *scmd, struct megasas_cmd_fusion *cmd) { u32 device_id; struct MPI2_RAID_SCSI_IO_REQUEST *io_request; u16 pd_index = 0; struct MR_FW_RAID_MAP_ALL *local_map_ptr; struct fusion_context *fusion = instance->ctrl_context; io_request = cmd->io_request; device_id = MEGASAS_DEV_INDEX(instance, scmd); pd_index = (scmd->device->channel * MEGASAS_MAX_DEV_PER_CHANNEL) +scmd->device->id; local_map_ptr = fusion->ld_map[(instance->map_id & 1)]; /* Check if this is a system PD I/O */ if (instance->pd_list[pd_index].driveState == MR_PD_STATE_SYSTEM) { io_request->Function = 0; io_request->DevHandle = local_map_ptr->raidMap.devHndlInfo[device_id].curDevHdl; io_request->RaidContext.timeoutValue = local_map_ptr->raidMap.fpPdIoTimeoutSec; io_request->RaidContext.regLockFlags = 0; io_request->RaidContext.regLockRowLBA = 0; io_request->RaidContext.regLockLength = 0; io_request->RaidContext.RAIDFlags = MR_RAID_FLAGS_IO_SUB_TYPE_SYSTEM_PD << MR_RAID_CTX_RAID_FLAGS_IO_SUB_TYPE_SHIFT; cmd->request_desc->SCSIIO.RequestFlags = (MPI2_REQ_DESCRIPT_FLAGS_HIGH_PRIORITY << MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT); } else { io_request->Function = MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST; io_request->DevHandle = device_id; cmd->request_desc->SCSIIO.RequestFlags = (MPI2_REQ_DESCRIPT_FLAGS_SCSI_IO << MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT); } io_request->RaidContext.VirtualDiskTgtId = device_id; io_request->LUN[1] = scmd->device->lun; io_request->DataLength = scsi_bufflen(scmd); } /** * megasas_build_io_fusion - Prepares IOs to devices * @instance: Adapter soft state * @scp: SCSI command * @cmd: Command to be prepared * * Invokes helper functions to prepare request frames * and sets flags appropriate for IO/Non-IO cmd */ int megasas_build_io_fusion(struct megasas_instance *instance, struct scsi_cmnd *scp, struct megasas_cmd_fusion *cmd) { u32 device_id, sge_count; struct MPI2_RAID_SCSI_IO_REQUEST *io_request = cmd->io_request; device_id = MEGASAS_DEV_INDEX(instance, scp); /* Zero out some fields so they don't get reused */ io_request->LUN[1] = 0; io_request->CDB.EEDP32.PrimaryReferenceTag = 0; io_request->CDB.EEDP32.PrimaryApplicationTagMask = 0; io_request->EEDPFlags = 0; io_request->Control = 0; io_request->EEDPBlockSize = 0; io_request->IoFlags = 0; io_request->RaidContext.RAIDFlags = 0; memcpy(io_request->CDB.CDB32, scp->cmnd, scp->cmd_len); /* * Just the CDB length,rest of the Flags are zero * This will be modified for FP in build_ldio_fusion */ io_request->IoFlags = scp->cmd_len; if (megasas_is_ldio(scp)) megasas_build_ldio_fusion(instance, scp, cmd); else megasas_build_dcdb_fusion(instance, scp, cmd); /* * Construct SGL */ sge_count = megasas_make_sgl_fusion(instance, scp, (struct MPI25_IEEE_SGE_CHAIN64 *) &io_request->SGL, cmd); if (sge_count > instance->max_num_sge) { printk(KERN_ERR "megasas: Error. sge_count (0x%x) exceeds " "max (0x%x) allowed\n", sge_count, instance->max_num_sge); return 1; } io_request->RaidContext.numSGE = sge_count; io_request->SGLFlags = MPI2_SGE_FLAGS_64_BIT_ADDRESSING; if (scp->sc_data_direction == PCI_DMA_TODEVICE) io_request->Control |= MPI2_SCSIIO_CONTROL_WRITE; else if (scp->sc_data_direction == PCI_DMA_FROMDEVICE) io_request->Control |= MPI2_SCSIIO_CONTROL_READ; io_request->SGLOffset0 = offsetof(struct MPI2_RAID_SCSI_IO_REQUEST, SGL) / 4; io_request->SenseBufferLowAddress = cmd->sense_phys_addr; io_request->SenseBufferLength = SCSI_SENSE_BUFFERSIZE; cmd->scmd = scp; scp->SCp.ptr = (char *)cmd; return 0; } union MEGASAS_REQUEST_DESCRIPTOR_UNION * megasas_get_request_descriptor(struct megasas_instance *instance, u16 index) { u8 *p; struct fusion_context *fusion; if (index >= instance->max_fw_cmds) { printk(KERN_ERR "megasas: Invalid SMID (0x%x)request for " "descriptor\n", index); return NULL; } fusion = instance->ctrl_context; p = fusion->req_frames_desc +sizeof(union MEGASAS_REQUEST_DESCRIPTOR_UNION) *index; return (union MEGASAS_REQUEST_DESCRIPTOR_UNION *)p; } /** * megasas_build_and_issue_cmd_fusion -Main routine for building and * issuing non IOCTL cmd * @instance: Adapter soft state * @scmd: pointer to scsi cmd from OS */ static u32 megasas_build_and_issue_cmd_fusion(struct megasas_instance *instance, struct scsi_cmnd *scmd) { struct megasas_cmd_fusion *cmd; union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc; u32 index; struct fusion_context *fusion; fusion = instance->ctrl_context; cmd = megasas_get_cmd_fusion(instance); if (!cmd) return SCSI_MLQUEUE_HOST_BUSY; index = cmd->index; req_desc = megasas_get_request_descriptor(instance, index-1); if (!req_desc) return 1; req_desc->Words = 0; cmd->request_desc = req_desc; cmd->request_desc->Words = 0; if (megasas_build_io_fusion(instance, scmd, cmd)) { megasas_return_cmd_fusion(instance, cmd); printk(KERN_ERR "megasas: Error building command.\n"); cmd->request_desc = NULL; return 1; } req_desc = cmd->request_desc; req_desc->SCSIIO.SMID = index; if (cmd->io_request->ChainOffset != 0 && cmd->io_request->ChainOffset != 0xF) printk(KERN_ERR "megasas: The chain offset value is not " "correct : %x\n", cmd->io_request->ChainOffset); /* * Issue the command to the FW */ atomic_inc(&instance->fw_outstanding); instance->instancet->fire_cmd(instance, req_desc->u.low, req_desc->u.high, instance->reg_set); return 0; } /** * complete_cmd_fusion - Completes command * @instance: Adapter soft state * Completes all commands that is in reply descriptor queue */ int complete_cmd_fusion(struct megasas_instance *instance) { union MPI2_REPLY_DESCRIPTORS_UNION *desc; struct MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR *reply_desc; struct MPI2_RAID_SCSI_IO_REQUEST *scsi_io_req; struct fusion_context *fusion; struct megasas_cmd *cmd_mfi; struct megasas_cmd_fusion *cmd_fusion; u16 smid, num_completed; u8 reply_descript_type, arm; u32 status, extStatus, device_id; union desc_value d_val; struct LD_LOAD_BALANCE_INFO *lbinfo; fusion = instance->ctrl_context; if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR) return IRQ_HANDLED; desc = fusion->reply_frames_desc; desc += fusion->last_reply_idx; reply_desc = (struct MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR *)desc; d_val.word = desc->Words; reply_descript_type = reply_desc->ReplyFlags & MPI2_RPY_DESCRIPT_FLAGS_TYPE_MASK; if (reply_descript_type == MPI2_RPY_DESCRIPT_FLAGS_UNUSED) return IRQ_NONE; d_val.word = desc->Words; num_completed = 0; while ((d_val.u.low != UINT_MAX) && (d_val.u.high != UINT_MAX)) { smid = reply_desc->SMID; cmd_fusion = fusion->cmd_list[smid - 1]; scsi_io_req = (struct MPI2_RAID_SCSI_IO_REQUEST *) cmd_fusion->io_request; if (cmd_fusion->scmd) cmd_fusion->scmd->SCp.ptr = NULL; status = scsi_io_req->RaidContext.status; extStatus = scsi_io_req->RaidContext.exStatus; switch (scsi_io_req->Function) { case MPI2_FUNCTION_SCSI_IO_REQUEST: /*Fast Path IO.*/ /* Update load balancing info */ device_id = MEGASAS_DEV_INDEX(instance, cmd_fusion->scmd); lbinfo = &fusion->load_balance_info[device_id]; if (cmd_fusion->scmd->SCp.Status & MEGASAS_LOAD_BALANCE_FLAG) { arm = lbinfo->raid1DevHandle[0] == cmd_fusion->io_request->DevHandle ? 0 : 1; atomic_dec(&lbinfo->scsi_pending_cmds[arm]); cmd_fusion->scmd->SCp.Status &= ~MEGASAS_LOAD_BALANCE_FLAG; } if (reply_descript_type == MPI2_RPY_DESCRIPT_FLAGS_SCSI_IO_SUCCESS) { if (megasas_dbg_lvl == 5) printk(KERN_ERR "\nmegasas: FAST Path " "IO Success\n"); } /* Fall thru and complete IO */ case MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST: /* LD-IO Path */ /* Map the FW Cmd Status */ map_cmd_status(cmd_fusion, status, extStatus); scsi_dma_unmap(cmd_fusion->scmd); cmd_fusion->scmd->scsi_done(cmd_fusion->scmd); scsi_io_req->RaidContext.status = 0; scsi_io_req->RaidContext.exStatus = 0; megasas_return_cmd_fusion(instance, cmd_fusion); atomic_dec(&instance->fw_outstanding); break; case MEGASAS_MPI2_FUNCTION_PASSTHRU_IO_REQUEST: /*MFI command */ cmd_mfi = instance->cmd_list[cmd_fusion->sync_cmd_idx]; megasas_complete_cmd(instance, cmd_mfi, DID_OK); cmd_fusion->flags = 0; megasas_return_cmd_fusion(instance, cmd_fusion); break; } fusion->last_reply_idx++; if (fusion->last_reply_idx >= fusion->reply_q_depth) fusion->last_reply_idx = 0; desc->Words = ULLONG_MAX; num_completed++; /* Get the next reply descriptor */ if (!fusion->last_reply_idx) desc = fusion->reply_frames_desc; else desc++; reply_desc = (struct MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR *)desc; d_val.word = desc->Words; reply_descript_type = reply_desc->ReplyFlags & MPI2_RPY_DESCRIPT_FLAGS_TYPE_MASK; if (reply_descript_type == MPI2_RPY_DESCRIPT_FLAGS_UNUSED) break; } if (!num_completed) return IRQ_NONE; wmb(); writel(fusion->last_reply_idx, &instance->reg_set->reply_post_host_index); megasas_check_and_restore_queue_depth(instance); return IRQ_HANDLED; } /** * megasas_complete_cmd_dpc_fusion - Completes command * @instance: Adapter soft state * * Tasklet to complete cmds */ void megasas_complete_cmd_dpc_fusion(unsigned long instance_addr) { struct megasas_instance *instance = (struct megasas_instance *)instance_addr; unsigned long flags; /* If we have already declared adapter dead, donot complete cmds */ spin_lock_irqsave(&instance->hba_lock, flags); if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR) { spin_unlock_irqrestore(&instance->hba_lock, flags); return; } spin_unlock_irqrestore(&instance->hba_lock, flags); spin_lock_irqsave(&instance->completion_lock, flags); complete_cmd_fusion(instance); spin_unlock_irqrestore(&instance->completion_lock, flags); } /** * megasas_isr_fusion - isr entry point */ irqreturn_t megasas_isr_fusion(int irq, void *devp) { struct megasas_instance *instance = (struct megasas_instance *)devp; u32 mfiStatus, fw_state; if (!instance->msi_flag) { mfiStatus = instance->instancet->clear_intr(instance->reg_set); if (!mfiStatus) return IRQ_NONE; } /* If we are resetting, bail */ if (test_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags)) return IRQ_HANDLED; if (!complete_cmd_fusion(instance)) { /* If we didn't complete any commands, check for FW fault */ fw_state = instance->instancet->read_fw_status_reg( instance->reg_set) & MFI_STATE_MASK; if (fw_state == MFI_STATE_FAULT) schedule_work(&instance->work_init); } return IRQ_HANDLED; } /** * build_mpt_mfi_pass_thru - builds a cmd fo MFI Pass thru * @instance: Adapter soft state * mfi_cmd: megasas_cmd pointer * */ u8 build_mpt_mfi_pass_thru(struct megasas_instance *instance, struct megasas_cmd *mfi_cmd) { struct MPI25_IEEE_SGE_CHAIN64 *mpi25_ieee_chain; struct MPI2_RAID_SCSI_IO_REQUEST *io_req; struct megasas_cmd_fusion *cmd; struct fusion_context *fusion; struct megasas_header *frame_hdr = &mfi_cmd->frame->hdr; cmd = megasas_get_cmd_fusion(instance); if (!cmd) return 1; /* Save the smid. To be used for returning the cmd */ mfi_cmd->context.smid = cmd->index; cmd->sync_cmd_idx = mfi_cmd->index; /* * For cmds where the flag is set, store the flag and check * on completion. For cmds with this flag, don't call * megasas_complete_cmd */ if (frame_hdr->flags & MFI_FRAME_DONT_POST_IN_REPLY_QUEUE) cmd->flags = MFI_FRAME_DONT_POST_IN_REPLY_QUEUE; fusion = instance->ctrl_context; io_req = cmd->io_request; mpi25_ieee_chain = (struct MPI25_IEEE_SGE_CHAIN64 *)&io_req->SGL.IeeeChain; io_req->Function = MEGASAS_MPI2_FUNCTION_PASSTHRU_IO_REQUEST; io_req->SGLOffset0 = offsetof(struct MPI2_RAID_SCSI_IO_REQUEST, SGL) / 4; io_req->ChainOffset = fusion->chain_offset_mfi_pthru; mpi25_ieee_chain->Address = mfi_cmd->frame_phys_addr; mpi25_ieee_chain->Flags = IEEE_SGE_FLAGS_CHAIN_ELEMENT | MPI2_IEEE_SGE_FLAGS_IOCPLBNTA_ADDR; mpi25_ieee_chain->Length = MEGASAS_MAX_SZ_CHAIN_FRAME; return 0; } /** * build_mpt_cmd - Calls helper function to build a cmd MFI Pass thru cmd * @instance: Adapter soft state * @cmd: mfi cmd to build * */ union MEGASAS_REQUEST_DESCRIPTOR_UNION * build_mpt_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd) { union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc; u16 index; if (build_mpt_mfi_pass_thru(instance, cmd)) { printk(KERN_ERR "Couldn't build MFI pass thru cmd\n"); return NULL; } index = cmd->context.smid; req_desc = megasas_get_request_descriptor(instance, index - 1); if (!req_desc) return NULL; req_desc->Words = 0; req_desc->SCSIIO.RequestFlags = (MPI2_REQ_DESCRIPT_FLAGS_SCSI_IO << MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT); req_desc->SCSIIO.SMID = index; return req_desc; } /** * megasas_issue_dcmd_fusion - Issues a MFI Pass thru cmd * @instance: Adapter soft state * @cmd: mfi cmd pointer * */ void megasas_issue_dcmd_fusion(struct megasas_instance *instance, struct megasas_cmd *cmd) { union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc; union desc_value d_val; req_desc = build_mpt_cmd(instance, cmd); if (!req_desc) { printk(KERN_ERR "Couldn't issue MFI pass thru cmd\n"); return; } d_val.word = req_desc->Words; instance->instancet->fire_cmd(instance, req_desc->u.low, req_desc->u.high, instance->reg_set); } /** * megasas_release_fusion - Reverses the FW initialization * @intance: Adapter soft state */ void megasas_release_fusion(struct megasas_instance *instance) { megasas_free_cmds(instance); megasas_free_cmds_fusion(instance); iounmap(instance->reg_set); pci_release_selected_regions(instance->pdev, instance->bar); } /** * megasas_read_fw_status_reg_fusion - returns the current FW status value * @regs: MFI register set */ static u32 megasas_read_fw_status_reg_fusion(struct megasas_register_set __iomem *regs) { return readl(&(regs)->outbound_scratch_pad); } /** * megasas_adp_reset_fusion - For controller reset * @regs: MFI register set */ static int megasas_adp_reset_fusion(struct megasas_instance *instance, struct megasas_register_set __iomem *regs) { return 0; } /** * megasas_check_reset_fusion - For controller reset check * @regs: MFI register set */ static int megasas_check_reset_fusion(struct megasas_instance *instance, struct megasas_register_set __iomem *regs) { return 0; } /* This function waits for outstanding commands on fusion to complete */ int megasas_wait_for_outstanding_fusion(struct megasas_instance *instance) { int i, outstanding, retval = 0; u32 fw_state, wait_time = MEGASAS_RESET_WAIT_TIME; for (i = 0; i < wait_time; i++) { /* Check if firmware is in fault state */ fw_state = instance->instancet->read_fw_status_reg( instance->reg_set) & MFI_STATE_MASK; if (fw_state == MFI_STATE_FAULT) { printk(KERN_WARNING "megasas: Found FW in FAULT state," " will reset adapter.\n"); retval = 1; goto out; } outstanding = atomic_read(&instance->fw_outstanding); if (!outstanding) goto out; if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) { printk(KERN_NOTICE "megasas: [%2d]waiting for %d " "commands to complete\n", i, outstanding); megasas_complete_cmd_dpc_fusion( (unsigned long)instance); } msleep(1000); } if (atomic_read(&instance->fw_outstanding)) { printk("megaraid_sas: pending commands remain after waiting, " "will reset adapter.\n"); retval = 1; } out: return retval; } void megasas_reset_reply_desc(struct megasas_instance *instance) { int i; struct fusion_context *fusion; union MPI2_REPLY_DESCRIPTORS_UNION *reply_desc; fusion = instance->ctrl_context; fusion->last_reply_idx = 0; reply_desc = fusion->reply_frames_desc; for (i = 0 ; i < fusion->reply_q_depth; i++, reply_desc++) reply_desc->Words = ULLONG_MAX; } /* Core fusion reset function */ int megasas_reset_fusion(struct Scsi_Host *shost) { int retval = SUCCESS, i, j, retry = 0; struct megasas_instance *instance; struct megasas_cmd_fusion *cmd_fusion; struct fusion_context *fusion; struct megasas_cmd *cmd_mfi; union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc; u32 host_diag, abs_state, status_reg, reset_adapter; instance = (struct megasas_instance *)shost->hostdata; fusion = instance->ctrl_context; if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR) { printk(KERN_WARNING "megaraid_sas: Hardware critical error, " "returning FAILED.\n"); retval = FAILED; goto out; } mutex_lock(&instance->reset_mutex); set_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags); instance->adprecovery = MEGASAS_ADPRESET_SM_INFAULT; instance->instancet->disable_intr(instance->reg_set); msleep(1000); /* First try waiting for commands to complete */ if (megasas_wait_for_outstanding_fusion(instance)) { printk(KERN_WARNING "megaraid_sas: resetting fusion " "adapter.\n"); /* Now return commands back to the OS */ for (i = 0 ; i < instance->max_fw_cmds; i++) { cmd_fusion = fusion->cmd_list[i]; if (cmd_fusion->scmd) { scsi_dma_unmap(cmd_fusion->scmd); cmd_fusion->scmd->result = (DID_RESET << 16); cmd_fusion->scmd->scsi_done(cmd_fusion->scmd); megasas_return_cmd_fusion(instance, cmd_fusion); atomic_dec(&instance->fw_outstanding); } } status_reg = instance->instancet->read_fw_status_reg( instance->reg_set); abs_state = status_reg & MFI_STATE_MASK; reset_adapter = status_reg & MFI_RESET_ADAPTER; if (instance->disableOnlineCtrlReset || (abs_state == MFI_STATE_FAULT && !reset_adapter)) { /* Reset not supported, kill adapter */ printk(KERN_WARNING "megaraid_sas: Reset not supported" ", killing adapter.\n"); megaraid_sas_kill_hba(instance); instance->adprecovery = MEGASAS_HW_CRITICAL_ERROR; retval = FAILED; goto out; } /* Now try to reset the chip */ for (i = 0; i < MEGASAS_FUSION_MAX_RESET_TRIES; i++) { writel(MPI2_WRSEQ_FLUSH_KEY_VALUE, &instance->reg_set->fusion_seq_offset); writel(MPI2_WRSEQ_1ST_KEY_VALUE, &instance->reg_set->fusion_seq_offset); writel(MPI2_WRSEQ_2ND_KEY_VALUE, &instance->reg_set->fusion_seq_offset); writel(MPI2_WRSEQ_3RD_KEY_VALUE, &instance->reg_set->fusion_seq_offset); writel(MPI2_WRSEQ_4TH_KEY_VALUE, &instance->reg_set->fusion_seq_offset); writel(MPI2_WRSEQ_5TH_KEY_VALUE, &instance->reg_set->fusion_seq_offset); writel(MPI2_WRSEQ_6TH_KEY_VALUE, &instance->reg_set->fusion_seq_offset); /* Check that the diag write enable (DRWE) bit is on */ host_diag = readl(&instance->reg_set->fusion_host_diag); retry = 0; while (!(host_diag & HOST_DIAG_WRITE_ENABLE)) { msleep(100); host_diag = readl(&instance->reg_set->fusion_host_diag); if (retry++ == 100) { printk(KERN_WARNING "megaraid_sas: " "Host diag unlock failed!\n"); break; } } if (!(host_diag & HOST_DIAG_WRITE_ENABLE)) continue; /* Send chip reset command */ writel(host_diag | HOST_DIAG_RESET_ADAPTER, &instance->reg_set->fusion_host_diag); msleep(3000); /* Make sure reset adapter bit is cleared */ host_diag = readl(&instance->reg_set->fusion_host_diag); retry = 0; while (host_diag & HOST_DIAG_RESET_ADAPTER) { msleep(100); host_diag = readl(&instance->reg_set->fusion_host_diag); if (retry++ == 1000) { printk(KERN_WARNING "megaraid_sas: " "Diag reset adapter never " "cleared!\n"); break; } } if (host_diag & HOST_DIAG_RESET_ADAPTER) continue; abs_state = instance->instancet->read_fw_status_reg( instance->reg_set) & MFI_STATE_MASK; retry = 0; while ((abs_state <= MFI_STATE_FW_INIT) && (retry++ < 1000)) { msleep(100); abs_state = instance->instancet->read_fw_status_reg( instance->reg_set) & MFI_STATE_MASK; } if (abs_state <= MFI_STATE_FW_INIT) { printk(KERN_WARNING "megaraid_sas: firmware " "state < MFI_STATE_FW_INIT, state = " "0x%x\n", abs_state); continue; } /* Wait for FW to become ready */ if (megasas_transition_to_ready(instance, 1)) { printk(KERN_WARNING "megaraid_sas: Failed to " "transition controller to ready.\n"); continue; } megasas_reset_reply_desc(instance); if (megasas_ioc_init_fusion(instance)) { printk(KERN_WARNING "megaraid_sas: " "megasas_ioc_init_fusion() failed!\n"); continue; } instance->instancet->enable_intr(instance->reg_set); instance->adprecovery = MEGASAS_HBA_OPERATIONAL; /* Re-fire management commands */ for (j = 0 ; j < instance->max_fw_cmds; j++) { cmd_fusion = fusion->cmd_list[j]; if (cmd_fusion->sync_cmd_idx != (u32)ULONG_MAX) { cmd_mfi = instance-> cmd_list[cmd_fusion->sync_cmd_idx]; if (cmd_mfi->frame->dcmd.opcode == MR_DCMD_LD_MAP_GET_INFO) { megasas_return_cmd(instance, cmd_mfi); megasas_return_cmd_fusion( instance, cmd_fusion); } else { req_desc = megasas_get_request_descriptor( instance, cmd_mfi->context.smid -1); if (!req_desc) printk(KERN_WARNING "req_desc NULL" "\n"); else { instance->instancet-> fire_cmd(instance, req_desc-> u.low, req_desc-> u.high, instance-> reg_set); } } } } /* Reset load balance info */ memset(fusion->load_balance_info, 0, sizeof(struct LD_LOAD_BALANCE_INFO) *MAX_LOGICAL_DRIVES); if (!megasas_get_map_info(instance)) megasas_sync_map_info(instance); /* Adapter reset completed successfully */ printk(KERN_WARNING "megaraid_sas: Reset " "successful.\n"); retval = SUCCESS; goto out; } /* Reset failed, kill the adapter */ printk(KERN_WARNING "megaraid_sas: Reset failed, killing " "adapter.\n"); megaraid_sas_kill_hba(instance); retval = FAILED; } else { instance->instancet->enable_intr(instance->reg_set); instance->adprecovery = MEGASAS_HBA_OPERATIONAL; } out: clear_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags); mutex_unlock(&instance->reset_mutex); return retval; } /* Fusion OCR work queue */ void megasas_fusion_ocr_wq(struct work_struct *work) { struct megasas_instance *instance = container_of(work, struct megasas_instance, work_init); megasas_reset_fusion(instance->host); } struct megasas_instance_template megasas_instance_template_fusion = { .fire_cmd = megasas_fire_cmd_fusion, .enable_intr = megasas_enable_intr_fusion, .disable_intr = megasas_disable_intr_fusion, .clear_intr = megasas_clear_intr_fusion, .read_fw_status_reg = megasas_read_fw_status_reg_fusion, .adp_reset = megasas_adp_reset_fusion, .check_reset = megasas_check_reset_fusion, .service_isr = megasas_isr_fusion, .tasklet = megasas_complete_cmd_dpc_fusion, .init_adapter = megasas_init_adapter_fusion, .build_and_issue_cmd = megasas_build_and_issue_cmd_fusion, .issue_dcmd = megasas_issue_dcmd_fusion, };