| /* |
| * |
| * Linux MegaRAID driver for SAS based RAID controllers |
| * |
| * Copyright (c) 2003-2005 LSI Logic 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. |
| * |
| * FILE : megaraid_sas.c |
| * Version : v00.00.02.04 |
| * |
| * Authors: |
| * Sreenivas Bagalkote <Sreenivas.Bagalkote@lsil.com> |
| * Sumant Patro <Sumant.Patro@lsil.com> |
| * |
| * List of supported controllers |
| * |
| * OEM Product Name VID DID SSVID SSID |
| * --- ------------ --- --- ---- ---- |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/types.h> |
| #include <linux/pci.h> |
| #include <linux/list.h> |
| #include <linux/moduleparam.h> |
| #include <linux/module.h> |
| #include <linux/spinlock.h> |
| #include <linux/interrupt.h> |
| #include <linux/delay.h> |
| #include <linux/uio.h> |
| #include <asm/uaccess.h> |
| #include <linux/fs.h> |
| #include <linux/compat.h> |
| #include <linux/mutex.h> |
| |
| #include <scsi/scsi.h> |
| #include <scsi/scsi_cmnd.h> |
| #include <scsi/scsi_device.h> |
| #include <scsi/scsi_host.h> |
| #include "megaraid_sas.h" |
| |
| MODULE_LICENSE("GPL"); |
| MODULE_VERSION(MEGASAS_VERSION); |
| MODULE_AUTHOR("sreenivas.bagalkote@lsil.com"); |
| MODULE_DESCRIPTION("LSI Logic MegaRAID SAS Driver"); |
| |
| /* |
| * PCI ID table for all supported controllers |
| */ |
| static struct pci_device_id megasas_pci_table[] = { |
| |
| { |
| PCI_VENDOR_ID_LSI_LOGIC, |
| PCI_DEVICE_ID_LSI_SAS1064R, // xscale IOP |
| PCI_ANY_ID, |
| PCI_ANY_ID, |
| }, |
| { |
| PCI_VENDOR_ID_DELL, |
| PCI_DEVICE_ID_DELL_PERC5, // xscale IOP |
| PCI_ANY_ID, |
| PCI_ANY_ID, |
| }, |
| {0} /* Terminating entry */ |
| }; |
| |
| MODULE_DEVICE_TABLE(pci, megasas_pci_table); |
| |
| static int megasas_mgmt_majorno; |
| static struct megasas_mgmt_info megasas_mgmt_info; |
| static struct fasync_struct *megasas_async_queue; |
| static DEFINE_MUTEX(megasas_async_queue_mutex); |
| |
| /** |
| * megasas_get_cmd - Get a command from the free pool |
| * @instance: Adapter soft state |
| * |
| * Returns a free command from the pool |
| */ |
| static struct megasas_cmd *megasas_get_cmd(struct megasas_instance |
| *instance) |
| { |
| unsigned long flags; |
| struct megasas_cmd *cmd = NULL; |
| |
| spin_lock_irqsave(&instance->cmd_pool_lock, flags); |
| |
| if (!list_empty(&instance->cmd_pool)) { |
| cmd = list_entry((&instance->cmd_pool)->next, |
| struct megasas_cmd, list); |
| list_del_init(&cmd->list); |
| } else { |
| printk(KERN_ERR "megasas: Command pool empty!\n"); |
| } |
| |
| spin_unlock_irqrestore(&instance->cmd_pool_lock, flags); |
| return cmd; |
| } |
| |
| /** |
| * megasas_return_cmd - 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(struct megasas_instance *instance, struct megasas_cmd *cmd) |
| { |
| unsigned long flags; |
| |
| spin_lock_irqsave(&instance->cmd_pool_lock, flags); |
| |
| cmd->scmd = NULL; |
| list_add_tail(&cmd->list, &instance->cmd_pool); |
| |
| spin_unlock_irqrestore(&instance->cmd_pool_lock, flags); |
| } |
| |
| |
| /** |
| * The following functions are defined for xscale |
| * (deviceid : 1064R, PERC5) controllers |
| */ |
| |
| /** |
| * megasas_enable_intr_xscale - Enables interrupts |
| * @regs: MFI register set |
| */ |
| static inline void |
| megasas_enable_intr_xscale(struct megasas_register_set __iomem * regs) |
| { |
| writel(1, &(regs)->outbound_intr_mask); |
| |
| /* Dummy readl to force pci flush */ |
| readl(®s->outbound_intr_mask); |
| } |
| |
| /** |
| * megasas_read_fw_status_reg_xscale - returns the current FW status value |
| * @regs: MFI register set |
| */ |
| static u32 |
| megasas_read_fw_status_reg_xscale(struct megasas_register_set __iomem * regs) |
| { |
| return readl(&(regs)->outbound_msg_0); |
| } |
| /** |
| * megasas_clear_interrupt_xscale - Check & clear interrupt |
| * @regs: MFI register set |
| */ |
| static int |
| megasas_clear_intr_xscale(struct megasas_register_set __iomem * regs) |
| { |
| u32 status; |
| /* |
| * Check if it is our interrupt |
| */ |
| status = readl(®s->outbound_intr_status); |
| |
| if (!(status & MFI_OB_INTR_STATUS_MASK)) { |
| return 1; |
| } |
| |
| /* |
| * Clear the interrupt by writing back the same value |
| */ |
| writel(status, ®s->outbound_intr_status); |
| |
| return 0; |
| } |
| |
| /** |
| * megasas_fire_cmd_xscale - Sends command to the FW |
| * @frame_phys_addr : Physical address of cmd |
| * @frame_count : Number of frames for the command |
| * @regs : MFI register set |
| */ |
| static inline void |
| megasas_fire_cmd_xscale(dma_addr_t frame_phys_addr,u32 frame_count, struct megasas_register_set __iomem *regs) |
| { |
| writel((frame_phys_addr >> 3)|(frame_count), |
| &(regs)->inbound_queue_port); |
| } |
| |
| static struct megasas_instance_template megasas_instance_template_xscale = { |
| |
| .fire_cmd = megasas_fire_cmd_xscale, |
| .enable_intr = megasas_enable_intr_xscale, |
| .clear_intr = megasas_clear_intr_xscale, |
| .read_fw_status_reg = megasas_read_fw_status_reg_xscale, |
| }; |
| |
| /** |
| * This is the end of set of functions & definitions specific |
| * to xscale (deviceid : 1064R, PERC5) controllers |
| */ |
| |
| /** |
| * megasas_disable_intr - Disables interrupts |
| * @regs: MFI register set |
| */ |
| static inline void |
| megasas_disable_intr(struct megasas_register_set __iomem * regs) |
| { |
| u32 mask = 0x1f; |
| writel(mask, ®s->outbound_intr_mask); |
| |
| /* Dummy readl to force pci flush */ |
| readl(®s->outbound_intr_mask); |
| } |
| |
| /** |
| * megasas_issue_polled - 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. |
| */ |
| static int |
| megasas_issue_polled(struct megasas_instance *instance, struct megasas_cmd *cmd) |
| { |
| int i; |
| u32 msecs = MFI_POLL_TIMEOUT_SECS * 1000; |
| |
| struct megasas_header *frame_hdr = &cmd->frame->hdr; |
| |
| frame_hdr->cmd_status = 0xFF; |
| frame_hdr->flags |= MFI_FRAME_DONT_POST_IN_REPLY_QUEUE; |
| |
| /* |
| * Issue the frame using inbound queue port |
| */ |
| instance->instancet->fire_cmd(cmd->frame_phys_addr ,0,instance->reg_set); |
| |
| /* |
| * Wait for cmd_status to change |
| */ |
| for (i = 0; (i < msecs) && (frame_hdr->cmd_status == 0xff); i++) { |
| rmb(); |
| msleep(1); |
| } |
| |
| if (frame_hdr->cmd_status == 0xff) |
| return -ETIME; |
| |
| return 0; |
| } |
| |
| /** |
| * megasas_issue_blocked_cmd - Synchronous wrapper around regular FW cmds |
| * @instance: Adapter soft state |
| * @cmd: Command to be issued |
| * |
| * This function waits on an event for the command to be returned from ISR. |
| * Used to issue ioctl commands. |
| */ |
| static int |
| megasas_issue_blocked_cmd(struct megasas_instance *instance, |
| struct megasas_cmd *cmd) |
| { |
| cmd->cmd_status = ENODATA; |
| |
| instance->instancet->fire_cmd(cmd->frame_phys_addr ,0,instance->reg_set); |
| |
| wait_event(instance->int_cmd_wait_q, (cmd->cmd_status != ENODATA)); |
| |
| return 0; |
| } |
| |
| /** |
| * megasas_issue_blocked_abort_cmd - Aborts previously issued cmd |
| * @instance: Adapter soft state |
| * @cmd_to_abort: Previously issued cmd to be aborted |
| * |
| * MFI firmware can abort previously issued AEN comamnd (automatic event |
| * notification). The megasas_issue_blocked_abort_cmd() issues such abort |
| * cmd and blocks till it is completed. |
| */ |
| static int |
| megasas_issue_blocked_abort_cmd(struct megasas_instance *instance, |
| struct megasas_cmd *cmd_to_abort) |
| { |
| struct megasas_cmd *cmd; |
| struct megasas_abort_frame *abort_fr; |
| |
| cmd = megasas_get_cmd(instance); |
| |
| if (!cmd) |
| return -1; |
| |
| abort_fr = &cmd->frame->abort; |
| |
| /* |
| * Prepare and issue the abort frame |
| */ |
| abort_fr->cmd = MFI_CMD_ABORT; |
| abort_fr->cmd_status = 0xFF; |
| abort_fr->flags = 0; |
| abort_fr->abort_context = cmd_to_abort->index; |
| abort_fr->abort_mfi_phys_addr_lo = cmd_to_abort->frame_phys_addr; |
| abort_fr->abort_mfi_phys_addr_hi = 0; |
| |
| cmd->sync_cmd = 1; |
| cmd->cmd_status = 0xFF; |
| |
| instance->instancet->fire_cmd(cmd->frame_phys_addr ,0,instance->reg_set); |
| |
| /* |
| * Wait for this cmd to complete |
| */ |
| wait_event(instance->abort_cmd_wait_q, (cmd->cmd_status != 0xFF)); |
| |
| megasas_return_cmd(instance, cmd); |
| return 0; |
| } |
| |
| /** |
| * megasas_make_sgl32 - Prepares 32-bit SGL |
| * @instance: Adapter soft state |
| * @scp: SCSI command from the mid-layer |
| * @mfi_sgl: SGL to be filled in |
| * |
| * If successful, this function returns the number of SG elements. Otherwise, |
| * it returnes -1. |
| */ |
| static int |
| megasas_make_sgl32(struct megasas_instance *instance, struct scsi_cmnd *scp, |
| union megasas_sgl *mfi_sgl) |
| { |
| int i; |
| int sge_count; |
| struct scatterlist *os_sgl; |
| |
| /* |
| * Return 0 if there is no data transfer |
| */ |
| if (!scp->request_buffer || !scp->request_bufflen) |
| return 0; |
| |
| if (!scp->use_sg) { |
| mfi_sgl->sge32[0].phys_addr = pci_map_single(instance->pdev, |
| scp-> |
| request_buffer, |
| scp-> |
| request_bufflen, |
| scp-> |
| sc_data_direction); |
| mfi_sgl->sge32[0].length = scp->request_bufflen; |
| |
| return 1; |
| } |
| |
| os_sgl = (struct scatterlist *)scp->request_buffer; |
| sge_count = pci_map_sg(instance->pdev, os_sgl, scp->use_sg, |
| scp->sc_data_direction); |
| |
| for (i = 0; i < sge_count; i++, os_sgl++) { |
| mfi_sgl->sge32[i].length = sg_dma_len(os_sgl); |
| mfi_sgl->sge32[i].phys_addr = sg_dma_address(os_sgl); |
| } |
| |
| return sge_count; |
| } |
| |
| /** |
| * megasas_make_sgl64 - Prepares 64-bit SGL |
| * @instance: Adapter soft state |
| * @scp: SCSI command from the mid-layer |
| * @mfi_sgl: SGL to be filled in |
| * |
| * If successful, this function returns the number of SG elements. Otherwise, |
| * it returnes -1. |
| */ |
| static int |
| megasas_make_sgl64(struct megasas_instance *instance, struct scsi_cmnd *scp, |
| union megasas_sgl *mfi_sgl) |
| { |
| int i; |
| int sge_count; |
| struct scatterlist *os_sgl; |
| |
| /* |
| * Return 0 if there is no data transfer |
| */ |
| if (!scp->request_buffer || !scp->request_bufflen) |
| return 0; |
| |
| if (!scp->use_sg) { |
| mfi_sgl->sge64[0].phys_addr = pci_map_single(instance->pdev, |
| scp-> |
| request_buffer, |
| scp-> |
| request_bufflen, |
| scp-> |
| sc_data_direction); |
| |
| mfi_sgl->sge64[0].length = scp->request_bufflen; |
| |
| return 1; |
| } |
| |
| os_sgl = (struct scatterlist *)scp->request_buffer; |
| sge_count = pci_map_sg(instance->pdev, os_sgl, scp->use_sg, |
| scp->sc_data_direction); |
| |
| for (i = 0; i < sge_count; i++, os_sgl++) { |
| mfi_sgl->sge64[i].length = sg_dma_len(os_sgl); |
| mfi_sgl->sge64[i].phys_addr = sg_dma_address(os_sgl); |
| } |
| |
| return sge_count; |
| } |
| |
| /** |
| * megasas_build_dcdb - Prepares a direct cdb (DCDB) command |
| * @instance: Adapter soft state |
| * @scp: SCSI command |
| * @cmd: Command to be prepared in |
| * |
| * This function prepares CDB commands. These are typcially pass-through |
| * commands to the devices. |
| */ |
| static int |
| megasas_build_dcdb(struct megasas_instance *instance, struct scsi_cmnd *scp, |
| struct megasas_cmd *cmd) |
| { |
| u32 sge_sz; |
| int sge_bytes; |
| u32 is_logical; |
| u32 device_id; |
| u16 flags = 0; |
| struct megasas_pthru_frame *pthru; |
| |
| is_logical = MEGASAS_IS_LOGICAL(scp); |
| device_id = MEGASAS_DEV_INDEX(instance, scp); |
| pthru = (struct megasas_pthru_frame *)cmd->frame; |
| |
| if (scp->sc_data_direction == PCI_DMA_TODEVICE) |
| flags = MFI_FRAME_DIR_WRITE; |
| else if (scp->sc_data_direction == PCI_DMA_FROMDEVICE) |
| flags = MFI_FRAME_DIR_READ; |
| else if (scp->sc_data_direction == PCI_DMA_NONE) |
| flags = MFI_FRAME_DIR_NONE; |
| |
| /* |
| * Prepare the DCDB frame |
| */ |
| pthru->cmd = (is_logical) ? MFI_CMD_LD_SCSI_IO : MFI_CMD_PD_SCSI_IO; |
| pthru->cmd_status = 0x0; |
| pthru->scsi_status = 0x0; |
| pthru->target_id = device_id; |
| pthru->lun = scp->device->lun; |
| pthru->cdb_len = scp->cmd_len; |
| pthru->timeout = 0; |
| pthru->flags = flags; |
| pthru->data_xfer_len = scp->request_bufflen; |
| |
| memcpy(pthru->cdb, scp->cmnd, scp->cmd_len); |
| |
| /* |
| * Construct SGL |
| */ |
| sge_sz = (IS_DMA64) ? sizeof(struct megasas_sge64) : |
| sizeof(struct megasas_sge32); |
| |
| if (IS_DMA64) { |
| pthru->flags |= MFI_FRAME_SGL64; |
| pthru->sge_count = megasas_make_sgl64(instance, scp, |
| &pthru->sgl); |
| } else |
| pthru->sge_count = megasas_make_sgl32(instance, scp, |
| &pthru->sgl); |
| |
| /* |
| * Sense info specific |
| */ |
| pthru->sense_len = SCSI_SENSE_BUFFERSIZE; |
| pthru->sense_buf_phys_addr_hi = 0; |
| pthru->sense_buf_phys_addr_lo = cmd->sense_phys_addr; |
| |
| sge_bytes = sge_sz * pthru->sge_count; |
| |
| /* |
| * Compute the total number of frames this command consumes. FW uses |
| * this number to pull sufficient number of frames from host memory. |
| */ |
| cmd->frame_count = (sge_bytes / MEGAMFI_FRAME_SIZE) + |
| ((sge_bytes % MEGAMFI_FRAME_SIZE) ? 1 : 0) + 1; |
| |
| if (cmd->frame_count > 7) |
| cmd->frame_count = 8; |
| |
| return cmd->frame_count; |
| } |
| |
| /** |
| * megasas_build_ldio - Prepares IOs to logical devices |
| * @instance: Adapter soft state |
| * @scp: SCSI command |
| * @cmd: Command to to be prepared |
| * |
| * Frames (and accompanying SGLs) for regular SCSI IOs use this function. |
| */ |
| static int |
| megasas_build_ldio(struct megasas_instance *instance, struct scsi_cmnd *scp, |
| struct megasas_cmd *cmd) |
| { |
| u32 sge_sz; |
| int sge_bytes; |
| u32 device_id; |
| u8 sc = scp->cmnd[0]; |
| u16 flags = 0; |
| struct megasas_io_frame *ldio; |
| |
| device_id = MEGASAS_DEV_INDEX(instance, scp); |
| ldio = (struct megasas_io_frame *)cmd->frame; |
| |
| if (scp->sc_data_direction == PCI_DMA_TODEVICE) |
| flags = MFI_FRAME_DIR_WRITE; |
| else if (scp->sc_data_direction == PCI_DMA_FROMDEVICE) |
| flags = MFI_FRAME_DIR_READ; |
| |
| /* |
| * Preare the Logical IO frame: 2nd bit is zero for all read cmds |
| */ |
| ldio->cmd = (sc & 0x02) ? MFI_CMD_LD_WRITE : MFI_CMD_LD_READ; |
| ldio->cmd_status = 0x0; |
| ldio->scsi_status = 0x0; |
| ldio->target_id = device_id; |
| ldio->timeout = 0; |
| ldio->reserved_0 = 0; |
| ldio->pad_0 = 0; |
| ldio->flags = flags; |
| ldio->start_lba_hi = 0; |
| ldio->access_byte = (scp->cmd_len != 6) ? scp->cmnd[1] : 0; |
| |
| /* |
| * 6-byte READ(0x08) or WRITE(0x0A) cdb |
| */ |
| if (scp->cmd_len == 6) { |
| ldio->lba_count = (u32) scp->cmnd[4]; |
| ldio->start_lba_lo = ((u32) scp->cmnd[1] << 16) | |
| ((u32) scp->cmnd[2] << 8) | (u32) scp->cmnd[3]; |
| |
| ldio->start_lba_lo &= 0x1FFFFF; |
| } |
| |
| /* |
| * 10-byte READ(0x28) or WRITE(0x2A) cdb |
| */ |
| else if (scp->cmd_len == 10) { |
| ldio->lba_count = (u32) scp->cmnd[8] | |
| ((u32) scp->cmnd[7] << 8); |
| ldio->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) { |
| ldio->lba_count = ((u32) scp->cmnd[6] << 24) | |
| ((u32) scp->cmnd[7] << 16) | |
| ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9]; |
| |
| ldio->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) { |
| ldio->lba_count = ((u32) scp->cmnd[10] << 24) | |
| ((u32) scp->cmnd[11] << 16) | |
| ((u32) scp->cmnd[12] << 8) | (u32) scp->cmnd[13]; |
| |
| ldio->start_lba_lo = ((u32) scp->cmnd[6] << 24) | |
| ((u32) scp->cmnd[7] << 16) | |
| ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9]; |
| |
| ldio->start_lba_hi = ((u32) scp->cmnd[2] << 24) | |
| ((u32) scp->cmnd[3] << 16) | |
| ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5]; |
| |
| } |
| |
| /* |
| * Construct SGL |
| */ |
| sge_sz = (IS_DMA64) ? sizeof(struct megasas_sge64) : |
| sizeof(struct megasas_sge32); |
| |
| if (IS_DMA64) { |
| ldio->flags |= MFI_FRAME_SGL64; |
| ldio->sge_count = megasas_make_sgl64(instance, scp, &ldio->sgl); |
| } else |
| ldio->sge_count = megasas_make_sgl32(instance, scp, &ldio->sgl); |
| |
| /* |
| * Sense info specific |
| */ |
| ldio->sense_len = SCSI_SENSE_BUFFERSIZE; |
| ldio->sense_buf_phys_addr_hi = 0; |
| ldio->sense_buf_phys_addr_lo = cmd->sense_phys_addr; |
| |
| sge_bytes = sge_sz * ldio->sge_count; |
| |
| cmd->frame_count = (sge_bytes / MEGAMFI_FRAME_SIZE) + |
| ((sge_bytes % MEGAMFI_FRAME_SIZE) ? 1 : 0) + 1; |
| |
| if (cmd->frame_count > 7) |
| cmd->frame_count = 8; |
| |
| return cmd->frame_count; |
| } |
| |
| /** |
| * megasas_is_ldio - Checks if the cmd is for logical drive |
| * @scmd: SCSI command |
| * |
| * Called by megasas_queue_command to find out if the command to be queued |
| * is a logical drive command |
| */ |
| static inline int megasas_is_ldio(struct scsi_cmnd *cmd) |
| { |
| if (!MEGASAS_IS_LOGICAL(cmd)) |
| return 0; |
| switch (cmd->cmnd[0]) { |
| case READ_10: |
| case WRITE_10: |
| case READ_12: |
| case WRITE_12: |
| case READ_6: |
| case WRITE_6: |
| case READ_16: |
| case WRITE_16: |
| return 1; |
| default: |
| return 0; |
| } |
| } |
| |
| /** |
| * megasas_queue_command - Queue entry point |
| * @scmd: SCSI command to be queued |
| * @done: Callback entry point |
| */ |
| static int |
| megasas_queue_command(struct scsi_cmnd *scmd, void (*done) (struct scsi_cmnd *)) |
| { |
| u32 frame_count; |
| unsigned long flags; |
| struct megasas_cmd *cmd; |
| struct megasas_instance *instance; |
| |
| instance = (struct megasas_instance *) |
| scmd->device->host->hostdata; |
| scmd->scsi_done = done; |
| scmd->result = 0; |
| |
| if (MEGASAS_IS_LOGICAL(scmd) && |
| (scmd->device->id >= MEGASAS_MAX_LD || scmd->device->lun)) { |
| scmd->result = DID_BAD_TARGET << 16; |
| goto out_done; |
| } |
| |
| cmd = megasas_get_cmd(instance); |
| if (!cmd) |
| return SCSI_MLQUEUE_HOST_BUSY; |
| |
| /* |
| * Logical drive command |
| */ |
| if (megasas_is_ldio(scmd)) |
| frame_count = megasas_build_ldio(instance, scmd, cmd); |
| else |
| frame_count = megasas_build_dcdb(instance, scmd, cmd); |
| |
| if (!frame_count) |
| goto out_return_cmd; |
| |
| cmd->scmd = scmd; |
| scmd->SCp.ptr = (char *)cmd; |
| scmd->SCp.sent_command = jiffies; |
| |
| /* |
| * Issue the command to the FW |
| */ |
| spin_lock_irqsave(&instance->instance_lock, flags); |
| instance->fw_outstanding++; |
| spin_unlock_irqrestore(&instance->instance_lock, flags); |
| |
| instance->instancet->fire_cmd(cmd->frame_phys_addr ,cmd->frame_count-1,instance->reg_set); |
| |
| return 0; |
| |
| out_return_cmd: |
| megasas_return_cmd(instance, cmd); |
| out_done: |
| done(scmd); |
| return 0; |
| } |
| |
| /** |
| * megasas_wait_for_outstanding - Wait for all outstanding cmds |
| * @instance: Adapter soft state |
| * |
| * This function waits for upto MEGASAS_RESET_WAIT_TIME seconds for FW to |
| * complete all its outstanding commands. Returns error if one or more IOs |
| * are pending after this time period. It also marks the controller dead. |
| */ |
| static int megasas_wait_for_outstanding(struct megasas_instance *instance) |
| { |
| int i; |
| u32 wait_time = MEGASAS_RESET_WAIT_TIME; |
| |
| for (i = 0; i < wait_time; i++) { |
| |
| if (!instance->fw_outstanding) |
| break; |
| |
| if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) { |
| printk(KERN_NOTICE "megasas: [%2d]waiting for %d " |
| "commands to complete\n", i, |
| instance->fw_outstanding); |
| } |
| |
| msleep(1000); |
| } |
| |
| if (instance->fw_outstanding) { |
| instance->hw_crit_error = 1; |
| return FAILED; |
| } |
| |
| return SUCCESS; |
| } |
| |
| /** |
| * megasas_generic_reset - Generic reset routine |
| * @scmd: Mid-layer SCSI command |
| * |
| * This routine implements a generic reset handler for device, bus and host |
| * reset requests. Device, bus and host specific reset handlers can use this |
| * function after they do their specific tasks. |
| */ |
| static int megasas_generic_reset(struct scsi_cmnd *scmd) |
| { |
| int ret_val; |
| struct megasas_instance *instance; |
| |
| instance = (struct megasas_instance *)scmd->device->host->hostdata; |
| |
| scmd_printk(KERN_NOTICE, scmd, "megasas: RESET -%ld cmd=%x\n", |
| scmd->serial_number, scmd->cmnd[0]); |
| |
| if (instance->hw_crit_error) { |
| printk(KERN_ERR "megasas: cannot recover from previous reset " |
| "failures\n"); |
| return FAILED; |
| } |
| |
| ret_val = megasas_wait_for_outstanding(instance); |
| if (ret_val == SUCCESS) |
| printk(KERN_NOTICE "megasas: reset successful \n"); |
| else |
| printk(KERN_ERR "megasas: failed to do reset\n"); |
| |
| return ret_val; |
| } |
| |
| static enum scsi_eh_timer_return megasas_reset_timer(struct scsi_cmnd *scmd) |
| { |
| unsigned long seconds; |
| |
| if (scmd->SCp.ptr) { |
| seconds = (jiffies - scmd->SCp.sent_command) / HZ; |
| |
| if (seconds < 90) { |
| return EH_RESET_TIMER; |
| } else { |
| return EH_NOT_HANDLED; |
| } |
| } |
| |
| return EH_HANDLED; |
| } |
| |
| /** |
| * megasas_reset_device - Device reset handler entry point |
| */ |
| static int megasas_reset_device(struct scsi_cmnd *scmd) |
| { |
| int ret; |
| |
| /* |
| * First wait for all commands to complete |
| */ |
| ret = megasas_generic_reset(scmd); |
| |
| return ret; |
| } |
| |
| /** |
| * megasas_reset_bus_host - Bus & host reset handler entry point |
| */ |
| static int megasas_reset_bus_host(struct scsi_cmnd *scmd) |
| { |
| int ret; |
| |
| /* |
| * Frist wait for all commands to complete |
| */ |
| ret = megasas_generic_reset(scmd); |
| |
| return ret; |
| } |
| |
| /** |
| * megasas_service_aen - Processes an event notification |
| * @instance: Adapter soft state |
| * @cmd: AEN command completed by the ISR |
| * |
| * For AEN, driver sends a command down to FW that is held by the FW till an |
| * event occurs. When an event of interest occurs, FW completes the command |
| * that it was previously holding. |
| * |
| * This routines sends SIGIO signal to processes that have registered with the |
| * driver for AEN. |
| */ |
| static void |
| megasas_service_aen(struct megasas_instance *instance, struct megasas_cmd *cmd) |
| { |
| /* |
| * Don't signal app if it is just an aborted previously registered aen |
| */ |
| if (!cmd->abort_aen) |
| kill_fasync(&megasas_async_queue, SIGIO, POLL_IN); |
| else |
| cmd->abort_aen = 0; |
| |
| instance->aen_cmd = NULL; |
| megasas_return_cmd(instance, cmd); |
| } |
| |
| /* |
| * Scsi host template for megaraid_sas driver |
| */ |
| static struct scsi_host_template megasas_template = { |
| |
| .module = THIS_MODULE, |
| .name = "LSI Logic SAS based MegaRAID driver", |
| .proc_name = "megaraid_sas", |
| .queuecommand = megasas_queue_command, |
| .eh_device_reset_handler = megasas_reset_device, |
| .eh_bus_reset_handler = megasas_reset_bus_host, |
| .eh_host_reset_handler = megasas_reset_bus_host, |
| .eh_timed_out = megasas_reset_timer, |
| .use_clustering = ENABLE_CLUSTERING, |
| }; |
| |
| /** |
| * megasas_complete_int_cmd - Completes an internal command |
| * @instance: Adapter soft state |
| * @cmd: Command to be completed |
| * |
| * The megasas_issue_blocked_cmd() function waits for a command to complete |
| * after it issues a command. This function wakes up that waiting routine by |
| * calling wake_up() on the wait queue. |
| */ |
| static void |
| megasas_complete_int_cmd(struct megasas_instance *instance, |
| struct megasas_cmd *cmd) |
| { |
| cmd->cmd_status = cmd->frame->io.cmd_status; |
| |
| if (cmd->cmd_status == ENODATA) { |
| cmd->cmd_status = 0; |
| } |
| wake_up(&instance->int_cmd_wait_q); |
| } |
| |
| /** |
| * megasas_complete_abort - Completes aborting a command |
| * @instance: Adapter soft state |
| * @cmd: Cmd that was issued to abort another cmd |
| * |
| * The megasas_issue_blocked_abort_cmd() function waits on abort_cmd_wait_q |
| * after it issues an abort on a previously issued command. This function |
| * wakes up all functions waiting on the same wait queue. |
| */ |
| static void |
| megasas_complete_abort(struct megasas_instance *instance, |
| struct megasas_cmd *cmd) |
| { |
| if (cmd->sync_cmd) { |
| cmd->sync_cmd = 0; |
| cmd->cmd_status = 0; |
| wake_up(&instance->abort_cmd_wait_q); |
| } |
| |
| return; |
| } |
| |
| /** |
| * megasas_unmap_sgbuf - Unmap SG buffers |
| * @instance: Adapter soft state |
| * @cmd: Completed command |
| */ |
| static void |
| megasas_unmap_sgbuf(struct megasas_instance *instance, struct megasas_cmd *cmd) |
| { |
| dma_addr_t buf_h; |
| u8 opcode; |
| |
| if (cmd->scmd->use_sg) { |
| pci_unmap_sg(instance->pdev, cmd->scmd->request_buffer, |
| cmd->scmd->use_sg, cmd->scmd->sc_data_direction); |
| return; |
| } |
| |
| if (!cmd->scmd->request_bufflen) |
| return; |
| |
| opcode = cmd->frame->hdr.cmd; |
| |
| if ((opcode == MFI_CMD_LD_READ) || (opcode == MFI_CMD_LD_WRITE)) { |
| if (IS_DMA64) |
| buf_h = cmd->frame->io.sgl.sge64[0].phys_addr; |
| else |
| buf_h = cmd->frame->io.sgl.sge32[0].phys_addr; |
| } else { |
| if (IS_DMA64) |
| buf_h = cmd->frame->pthru.sgl.sge64[0].phys_addr; |
| else |
| buf_h = cmd->frame->pthru.sgl.sge32[0].phys_addr; |
| } |
| |
| pci_unmap_single(instance->pdev, buf_h, cmd->scmd->request_bufflen, |
| cmd->scmd->sc_data_direction); |
| return; |
| } |
| |
| /** |
| * megasas_complete_cmd - Completes a command |
| * @instance: Adapter soft state |
| * @cmd: Command to be completed |
| * @alt_status: If non-zero, use this value as status to |
| * SCSI mid-layer instead of the value returned |
| * by the FW. This should be used if caller wants |
| * an alternate status (as in the case of aborted |
| * commands) |
| */ |
| static void |
| megasas_complete_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd, |
| u8 alt_status) |
| { |
| int exception = 0; |
| struct megasas_header *hdr = &cmd->frame->hdr; |
| unsigned long flags; |
| |
| if (cmd->scmd) { |
| cmd->scmd->SCp.ptr = (char *)0; |
| } |
| |
| switch (hdr->cmd) { |
| |
| case MFI_CMD_PD_SCSI_IO: |
| case MFI_CMD_LD_SCSI_IO: |
| |
| /* |
| * MFI_CMD_PD_SCSI_IO and MFI_CMD_LD_SCSI_IO could have been |
| * issued either through an IO path or an IOCTL path. If it |
| * was via IOCTL, we will send it to internal completion. |
| */ |
| if (cmd->sync_cmd) { |
| cmd->sync_cmd = 0; |
| megasas_complete_int_cmd(instance, cmd); |
| break; |
| } |
| |
| /* |
| * Don't export physical disk devices to mid-layer. |
| */ |
| if (!MEGASAS_IS_LOGICAL(cmd->scmd) && |
| (hdr->cmd_status == MFI_STAT_OK) && |
| (cmd->scmd->cmnd[0] == INQUIRY)) { |
| |
| if (((*(u8 *) cmd->scmd->request_buffer) & 0x1F) == |
| TYPE_DISK) { |
| cmd->scmd->result = DID_BAD_TARGET << 16; |
| exception = 1; |
| } |
| } |
| |
| case MFI_CMD_LD_READ: |
| case MFI_CMD_LD_WRITE: |
| |
| if (alt_status) { |
| cmd->scmd->result = alt_status << 16; |
| exception = 1; |
| } |
| |
| if (exception) { |
| |
| spin_lock_irqsave(&instance->instance_lock, flags); |
| instance->fw_outstanding--; |
| spin_unlock_irqrestore(&instance->instance_lock, flags); |
| |
| megasas_unmap_sgbuf(instance, cmd); |
| cmd->scmd->scsi_done(cmd->scmd); |
| megasas_return_cmd(instance, cmd); |
| |
| break; |
| } |
| |
| switch (hdr->cmd_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) | hdr->scsi_status; |
| break; |
| |
| case MFI_STAT_SCSI_DONE_WITH_ERROR: |
| |
| cmd->scmd->result = (DID_OK << 16) | hdr->scsi_status; |
| |
| if (hdr->scsi_status == SAM_STAT_CHECK_CONDITION) { |
| memset(cmd->scmd->sense_buffer, 0, |
| SCSI_SENSE_BUFFERSIZE); |
| memcpy(cmd->scmd->sense_buffer, cmd->sense, |
| hdr->sense_len); |
| |
| 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: MFI FW status %#x\n", |
| hdr->cmd_status); |
| cmd->scmd->result = DID_ERROR << 16; |
| break; |
| } |
| |
| spin_lock_irqsave(&instance->instance_lock, flags); |
| instance->fw_outstanding--; |
| spin_unlock_irqrestore(&instance->instance_lock, flags); |
| |
| megasas_unmap_sgbuf(instance, cmd); |
| cmd->scmd->scsi_done(cmd->scmd); |
| megasas_return_cmd(instance, cmd); |
| |
| break; |
| |
| case MFI_CMD_SMP: |
| case MFI_CMD_STP: |
| case MFI_CMD_DCMD: |
| |
| /* |
| * See if got an event notification |
| */ |
| if (cmd->frame->dcmd.opcode == MR_DCMD_CTRL_EVENT_WAIT) |
| megasas_service_aen(instance, cmd); |
| else |
| megasas_complete_int_cmd(instance, cmd); |
| |
| break; |
| |
| case MFI_CMD_ABORT: |
| /* |
| * Cmd issued to abort another cmd returned |
| */ |
| megasas_complete_abort(instance, cmd); |
| break; |
| |
| default: |
| printk("megasas: Unknown command completed! [0x%X]\n", |
| hdr->cmd); |
| break; |
| } |
| } |
| |
| /** |
| * megasas_deplete_reply_queue - Processes all completed commands |
| * @instance: Adapter soft state |
| * @alt_status: Alternate status to be returned to |
| * SCSI mid-layer instead of the status |
| * returned by the FW |
| */ |
| static int |
| megasas_deplete_reply_queue(struct megasas_instance *instance, u8 alt_status) |
| { |
| u32 producer; |
| u32 consumer; |
| u32 context; |
| struct megasas_cmd *cmd; |
| |
| /* |
| * Check if it is our interrupt |
| * Clear the interrupt |
| */ |
| if(instance->instancet->clear_intr(instance->reg_set)) |
| return IRQ_NONE; |
| |
| producer = *instance->producer; |
| consumer = *instance->consumer; |
| |
| while (consumer != producer) { |
| context = instance->reply_queue[consumer]; |
| |
| cmd = instance->cmd_list[context]; |
| |
| megasas_complete_cmd(instance, cmd, alt_status); |
| |
| consumer++; |
| if (consumer == (instance->max_fw_cmds + 1)) { |
| consumer = 0; |
| } |
| } |
| |
| *instance->consumer = producer; |
| |
| return IRQ_HANDLED; |
| } |
| |
| /** |
| * megasas_isr - isr entry point |
| */ |
| static irqreturn_t megasas_isr(int irq, void *devp, struct pt_regs *regs) |
| { |
| return megasas_deplete_reply_queue((struct megasas_instance *)devp, |
| DID_OK); |
| } |
| |
| /** |
| * megasas_transition_to_ready - Move the FW to READY state |
| * @instance: Adapter soft state |
| * |
| * During the initialization, FW passes can potentially be in any one of |
| * several possible states. If the FW in operational, waiting-for-handshake |
| * states, driver must take steps to bring it to ready state. Otherwise, it |
| * has to wait for the ready state. |
| */ |
| static int |
| megasas_transition_to_ready(struct megasas_instance* instance) |
| { |
| int i; |
| u8 max_wait; |
| u32 fw_state; |
| u32 cur_state; |
| |
| fw_state = instance->instancet->read_fw_status_reg(instance->reg_set) & MFI_STATE_MASK; |
| |
| while (fw_state != MFI_STATE_READY) { |
| |
| printk(KERN_INFO "megasas: Waiting for FW to come to ready" |
| " state\n"); |
| switch (fw_state) { |
| |
| case MFI_STATE_FAULT: |
| |
| printk(KERN_DEBUG "megasas: FW in FAULT state!!\n"); |
| return -ENODEV; |
| |
| case MFI_STATE_WAIT_HANDSHAKE: |
| /* |
| * Set the CLR bit in inbound doorbell |
| */ |
| writel(MFI_INIT_CLEAR_HANDSHAKE, |
| &instance->reg_set->inbound_doorbell); |
| |
| max_wait = 2; |
| cur_state = MFI_STATE_WAIT_HANDSHAKE; |
| break; |
| |
| case MFI_STATE_OPERATIONAL: |
| /* |
| * Bring it to READY state; assuming max wait 2 secs |
| */ |
| megasas_disable_intr(instance->reg_set); |
| writel(MFI_INIT_READY, &instance->reg_set->inbound_doorbell); |
| |
| max_wait = 10; |
| cur_state = MFI_STATE_OPERATIONAL; |
| break; |
| |
| case MFI_STATE_UNDEFINED: |
| /* |
| * This state should not last for more than 2 seconds |
| */ |
| max_wait = 2; |
| cur_state = MFI_STATE_UNDEFINED; |
| break; |
| |
| case MFI_STATE_BB_INIT: |
| max_wait = 2; |
| cur_state = MFI_STATE_BB_INIT; |
| break; |
| |
| case MFI_STATE_FW_INIT: |
| max_wait = 20; |
| cur_state = MFI_STATE_FW_INIT; |
| break; |
| |
| case MFI_STATE_FW_INIT_2: |
| max_wait = 20; |
| cur_state = MFI_STATE_FW_INIT_2; |
| break; |
| |
| case MFI_STATE_DEVICE_SCAN: |
| max_wait = 20; |
| cur_state = MFI_STATE_DEVICE_SCAN; |
| break; |
| |
| case MFI_STATE_FLUSH_CACHE: |
| max_wait = 20; |
| cur_state = MFI_STATE_FLUSH_CACHE; |
| break; |
| |
| default: |
| printk(KERN_DEBUG "megasas: Unknown state 0x%x\n", |
| fw_state); |
| return -ENODEV; |
| } |
| |
| /* |
| * The cur_state should not last for more than max_wait secs |
| */ |
| for (i = 0; i < (max_wait * 1000); i++) { |
| fw_state = instance->instancet->read_fw_status_reg(instance->reg_set) & |
| MFI_STATE_MASK ; |
| |
| if (fw_state == cur_state) { |
| msleep(1); |
| } else |
| break; |
| } |
| |
| /* |
| * Return error if fw_state hasn't changed after max_wait |
| */ |
| if (fw_state == cur_state) { |
| printk(KERN_DEBUG "FW state [%d] hasn't changed " |
| "in %d secs\n", fw_state, max_wait); |
| return -ENODEV; |
| } |
| }; |
| |
| return 0; |
| } |
| |
| /** |
| * megasas_teardown_frame_pool - Destroy the cmd frame DMA pool |
| * @instance: Adapter soft state |
| */ |
| static void megasas_teardown_frame_pool(struct megasas_instance *instance) |
| { |
| int i; |
| u32 max_cmd = instance->max_fw_cmds; |
| struct megasas_cmd *cmd; |
| |
| if (!instance->frame_dma_pool) |
| return; |
| |
| /* |
| * Return all frames to pool |
| */ |
| for (i = 0; i < max_cmd; i++) { |
| |
| cmd = instance->cmd_list[i]; |
| |
| if (cmd->frame) |
| pci_pool_free(instance->frame_dma_pool, cmd->frame, |
| cmd->frame_phys_addr); |
| |
| if (cmd->sense) |
| pci_pool_free(instance->sense_dma_pool, cmd->frame, |
| cmd->sense_phys_addr); |
| } |
| |
| /* |
| * Now destroy the pool itself |
| */ |
| pci_pool_destroy(instance->frame_dma_pool); |
| pci_pool_destroy(instance->sense_dma_pool); |
| |
| instance->frame_dma_pool = NULL; |
| instance->sense_dma_pool = NULL; |
| } |
| |
| /** |
| * megasas_create_frame_pool - Creates DMA pool for cmd frames |
| * @instance: Adapter soft state |
| * |
| * Each command packet has an embedded DMA memory buffer that is used for |
| * filling MFI frame and the SG list that immediately follows the frame. This |
| * function creates those DMA memory buffers for each command packet by using |
| * PCI pool facility. |
| */ |
| static int megasas_create_frame_pool(struct megasas_instance *instance) |
| { |
| int i; |
| u32 max_cmd; |
| u32 sge_sz; |
| u32 sgl_sz; |
| u32 total_sz; |
| u32 frame_count; |
| struct megasas_cmd *cmd; |
| |
| max_cmd = instance->max_fw_cmds; |
| |
| /* |
| * Size of our frame is 64 bytes for MFI frame, followed by max SG |
| * elements and finally SCSI_SENSE_BUFFERSIZE bytes for sense buffer |
| */ |
| sge_sz = (IS_DMA64) ? sizeof(struct megasas_sge64) : |
| sizeof(struct megasas_sge32); |
| |
| /* |
| * Calculated the number of 64byte frames required for SGL |
| */ |
| sgl_sz = sge_sz * instance->max_num_sge; |
| frame_count = (sgl_sz + MEGAMFI_FRAME_SIZE - 1) / MEGAMFI_FRAME_SIZE; |
| |
| /* |
| * We need one extra frame for the MFI command |
| */ |
| frame_count++; |
| |
| total_sz = MEGAMFI_FRAME_SIZE * frame_count; |
| /* |
| * Use DMA pool facility provided by PCI layer |
| */ |
| instance->frame_dma_pool = pci_pool_create("megasas frame pool", |
| instance->pdev, total_sz, 64, |
| 0); |
| |
| if (!instance->frame_dma_pool) { |
| printk(KERN_DEBUG "megasas: failed to setup frame pool\n"); |
| return -ENOMEM; |
| } |
| |
| instance->sense_dma_pool = pci_pool_create("megasas sense pool", |
| instance->pdev, 128, 4, 0); |
| |
| if (!instance->sense_dma_pool) { |
| printk(KERN_DEBUG "megasas: failed to setup sense pool\n"); |
| |
| pci_pool_destroy(instance->frame_dma_pool); |
| instance->frame_dma_pool = NULL; |
| |
| return -ENOMEM; |
| } |
| |
| /* |
| * Allocate and attach a frame to each of the commands in cmd_list. |
| * By making cmd->index as the context instead of the &cmd, we can |
| * always use 32bit context regardless of the architecture |
| */ |
| for (i = 0; i < max_cmd; i++) { |
| |
| cmd = instance->cmd_list[i]; |
| |
| cmd->frame = pci_pool_alloc(instance->frame_dma_pool, |
| GFP_KERNEL, &cmd->frame_phys_addr); |
| |
| cmd->sense = pci_pool_alloc(instance->sense_dma_pool, |
| GFP_KERNEL, &cmd->sense_phys_addr); |
| |
| /* |
| * megasas_teardown_frame_pool() takes care of freeing |
| * whatever has been allocated |
| */ |
| if (!cmd->frame || !cmd->sense) { |
| printk(KERN_DEBUG "megasas: pci_pool_alloc failed \n"); |
| megasas_teardown_frame_pool(instance); |
| return -ENOMEM; |
| } |
| |
| cmd->frame->io.context = cmd->index; |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * megasas_free_cmds - Free all the cmds in the free cmd pool |
| * @instance: Adapter soft state |
| */ |
| static void megasas_free_cmds(struct megasas_instance *instance) |
| { |
| int i; |
| /* First free the MFI frame pool */ |
| megasas_teardown_frame_pool(instance); |
| |
| /* Free all the commands in the cmd_list */ |
| for (i = 0; i < instance->max_fw_cmds; i++) |
| kfree(instance->cmd_list[i]); |
| |
| /* Free the cmd_list buffer itself */ |
| kfree(instance->cmd_list); |
| instance->cmd_list = NULL; |
| |
| INIT_LIST_HEAD(&instance->cmd_pool); |
| } |
| |
| /** |
| * megasas_alloc_cmds - Allocates the command packets |
| * @instance: Adapter soft state |
| * |
| * Each command that is issued to the FW, whether IO commands from the OS or |
| * internal commands like IOCTLs, are wrapped in local data structure called |
| * megasas_cmd. The frame embedded in this megasas_cmd is actually issued to |
| * the FW. |
| * |
| * Each frame has a 32-bit field called context (tag). This context is used |
| * to get back the megasas_cmd from the frame when a frame gets completed in |
| * the ISR. Typically the address of the megasas_cmd itself would be used as |
| * the context. But we wanted to keep the differences between 32 and 64 bit |
| * systems to the mininum. We always use 32 bit integers for the context. 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 given the context. The |
| * free commands themselves are maintained in a linked list called cmd_pool. |
| */ |
| static int megasas_alloc_cmds(struct megasas_instance *instance) |
| { |
| int i; |
| int j; |
| u32 max_cmd; |
| struct megasas_cmd *cmd; |
| |
| max_cmd = instance->max_fw_cmds; |
| |
| /* |
| * instance->cmd_list is an array of struct megasas_cmd pointers. |
| * Allocate the dynamic array first and then allocate individual |
| * commands. |
| */ |
| instance->cmd_list = kmalloc(sizeof(struct megasas_cmd *) * max_cmd, |
| GFP_KERNEL); |
| |
| if (!instance->cmd_list) { |
| printk(KERN_DEBUG "megasas: out of memory\n"); |
| return -ENOMEM; |
| } |
| |
| memset(instance->cmd_list, 0, sizeof(struct megasas_cmd *) * max_cmd); |
| |
| for (i = 0; i < max_cmd; i++) { |
| instance->cmd_list[i] = kmalloc(sizeof(struct megasas_cmd), |
| GFP_KERNEL); |
| |
| if (!instance->cmd_list[i]) { |
| |
| for (j = 0; j < i; j++) |
| kfree(instance->cmd_list[j]); |
| |
| kfree(instance->cmd_list); |
| instance->cmd_list = NULL; |
| |
| return -ENOMEM; |
| } |
| } |
| |
| /* |
| * Add all the commands to command pool (instance->cmd_pool) |
| */ |
| for (i = 0; i < max_cmd; i++) { |
| cmd = instance->cmd_list[i]; |
| memset(cmd, 0, sizeof(struct megasas_cmd)); |
| cmd->index = i; |
| cmd->instance = instance; |
| |
| list_add_tail(&cmd->list, &instance->cmd_pool); |
| } |
| |
| /* |
| * Create a frame pool and assign one frame to each cmd |
| */ |
| if (megasas_create_frame_pool(instance)) { |
| printk(KERN_DEBUG "megasas: Error creating frame DMA pool\n"); |
| megasas_free_cmds(instance); |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * megasas_get_controller_info - Returns FW's controller structure |
| * @instance: Adapter soft state |
| * @ctrl_info: Controller information structure |
| * |
| * Issues an internal command (DCMD) to get the FW's controller structure. |
| * This information is mainly used to find out the maximum IO transfer per |
| * command supported by the FW. |
| */ |
| static int |
| megasas_get_ctrl_info(struct megasas_instance *instance, |
| struct megasas_ctrl_info *ctrl_info) |
| { |
| int ret = 0; |
| struct megasas_cmd *cmd; |
| struct megasas_dcmd_frame *dcmd; |
| struct megasas_ctrl_info *ci; |
| dma_addr_t ci_h = 0; |
| |
| cmd = megasas_get_cmd(instance); |
| |
| if (!cmd) { |
| printk(KERN_DEBUG "megasas: Failed to get a free cmd\n"); |
| return -ENOMEM; |
| } |
| |
| dcmd = &cmd->frame->dcmd; |
| |
| ci = pci_alloc_consistent(instance->pdev, |
| sizeof(struct megasas_ctrl_info), &ci_h); |
| |
| if (!ci) { |
| printk(KERN_DEBUG "Failed to alloc mem for ctrl 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->data_xfer_len = sizeof(struct megasas_ctrl_info); |
| dcmd->opcode = MR_DCMD_CTRL_GET_INFO; |
| dcmd->sgl.sge32[0].phys_addr = ci_h; |
| dcmd->sgl.sge32[0].length = sizeof(struct megasas_ctrl_info); |
| |
| if (!megasas_issue_polled(instance, cmd)) { |
| ret = 0; |
| memcpy(ctrl_info, ci, sizeof(struct megasas_ctrl_info)); |
| } else { |
| ret = -1; |
| } |
| |
| pci_free_consistent(instance->pdev, sizeof(struct megasas_ctrl_info), |
| ci, ci_h); |
| |
| megasas_return_cmd(instance, cmd); |
| return ret; |
| } |
| |
| /** |
| * megasas_init_mfi - Initializes the FW |
| * @instance: Adapter soft state |
| * |
| * This is the main function for initializing MFI firmware. |
| */ |
| static int megasas_init_mfi(struct megasas_instance *instance) |
| { |
| u32 context_sz; |
| u32 reply_q_sz; |
| u32 max_sectors_1; |
| u32 max_sectors_2; |
| struct megasas_register_set __iomem *reg_set; |
| |
| struct megasas_cmd *cmd; |
| struct megasas_ctrl_info *ctrl_info; |
| |
| struct megasas_init_frame *init_frame; |
| struct megasas_init_queue_info *initq_info; |
| dma_addr_t init_frame_h; |
| dma_addr_t initq_info_h; |
| |
| /* |
| * Map the message registers |
| */ |
| instance->base_addr = pci_resource_start(instance->pdev, 0); |
| |
| if (pci_request_regions(instance->pdev, "megasas: LSI Logic")) { |
| printk(KERN_DEBUG "megasas: IO memory region busy!\n"); |
| return -EBUSY; |
| } |
| |
| instance->reg_set = ioremap_nocache(instance->base_addr, 8192); |
| |
| if (!instance->reg_set) { |
| printk(KERN_DEBUG "megasas: Failed to map IO mem\n"); |
| goto fail_ioremap; |
| } |
| |
| reg_set = instance->reg_set; |
| |
| instance->instancet = &megasas_instance_template_xscale; |
| |
| /* |
| * We expect the FW state to be READY |
| */ |
| if (megasas_transition_to_ready(instance)) |
| goto fail_ready_state; |
| |
| /* |
| * Get various operational parameters from status register |
| */ |
| instance->max_fw_cmds = instance->instancet->read_fw_status_reg(reg_set) & 0x00FFFF; |
| instance->max_num_sge = (instance->instancet->read_fw_status_reg(reg_set) & 0xFF0000) >> |
| 0x10; |
| /* |
| * Create a pool of commands |
| */ |
| if (megasas_alloc_cmds(instance)) |
| goto fail_alloc_cmds; |
| |
| /* |
| * Allocate memory for reply queue. Length of reply queue should |
| * be _one_ more than the maximum commands handled by the firmware. |
| * |
| * Note: When FW completes commands, it places corresponding contex |
| * values in this circular reply queue. This circular queue is a fairly |
| * typical producer-consumer queue. FW is the producer (of completed |
| * commands) and the driver is the consumer. |
| */ |
| context_sz = sizeof(u32); |
| reply_q_sz = context_sz * (instance->max_fw_cmds + 1); |
| |
| instance->reply_queue = pci_alloc_consistent(instance->pdev, |
| reply_q_sz, |
| &instance->reply_queue_h); |
| |
| if (!instance->reply_queue) { |
| printk(KERN_DEBUG "megasas: Out of DMA mem for reply queue\n"); |
| goto fail_reply_queue; |
| } |
| |
| /* |
| * Prepare a init frame. Note the init frame points to queue info |
| * structure. Each frame has SGL allocated after first 64 bytes. For |
| * this frame - since we don't need any SGL - we use SGL's space as |
| * queue info structure |
| * |
| * We will not get a NULL command below. We just created the pool. |
| */ |
| cmd = megasas_get_cmd(instance); |
| |
| init_frame = (struct megasas_init_frame *)cmd->frame; |
| initq_info = (struct megasas_init_queue_info *) |
| ((unsigned long)init_frame + 64); |
| |
| init_frame_h = cmd->frame_phys_addr; |
| initq_info_h = init_frame_h + 64; |
| |
| memset(init_frame, 0, MEGAMFI_FRAME_SIZE); |
| memset(initq_info, 0, sizeof(struct megasas_init_queue_info)); |
| |
| initq_info->reply_queue_entries = instance->max_fw_cmds + 1; |
| initq_info->reply_queue_start_phys_addr_lo = instance->reply_queue_h; |
| |
| initq_info->producer_index_phys_addr_lo = instance->producer_h; |
| initq_info->consumer_index_phys_addr_lo = instance->consumer_h; |
| |
| init_frame->cmd = MFI_CMD_INIT; |
| init_frame->cmd_status = 0xFF; |
| init_frame->queue_info_new_phys_addr_lo = initq_info_h; |
| |
| init_frame->data_xfer_len = sizeof(struct megasas_init_queue_info); |
| |
| /* |
| * Issue the init frame in polled mode |
| */ |
| if (megasas_issue_polled(instance, cmd)) { |
| printk(KERN_DEBUG "megasas: Failed to init firmware\n"); |
| goto fail_fw_init; |
| } |
| |
| megasas_return_cmd(instance, cmd); |
| |
| ctrl_info = kmalloc(sizeof(struct megasas_ctrl_info), GFP_KERNEL); |
| |
| /* |
| * Compute the max allowed sectors per IO: The controller info has two |
| * limits on max sectors. Driver should use the minimum of these two. |
| * |
| * 1 << stripe_sz_ops.min = max sectors per strip |
| * |
| * Note that older firmwares ( < FW ver 30) didn't report information |
| * to calculate max_sectors_1. So the number ended up as zero always. |
| */ |
| if (ctrl_info && !megasas_get_ctrl_info(instance, ctrl_info)) { |
| |
| max_sectors_1 = (1 << ctrl_info->stripe_sz_ops.min) * |
| ctrl_info->max_strips_per_io; |
| max_sectors_2 = ctrl_info->max_request_size; |
| |
| instance->max_sectors_per_req = (max_sectors_1 < max_sectors_2) |
| ? max_sectors_1 : max_sectors_2; |
| } else |
| instance->max_sectors_per_req = instance->max_num_sge * |
| PAGE_SIZE / 512; |
| |
| kfree(ctrl_info); |
| |
| return 0; |
| |
| fail_fw_init: |
| megasas_return_cmd(instance, cmd); |
| |
| pci_free_consistent(instance->pdev, reply_q_sz, |
| instance->reply_queue, instance->reply_queue_h); |
| fail_reply_queue: |
| megasas_free_cmds(instance); |
| |
| fail_alloc_cmds: |
| fail_ready_state: |
| iounmap(instance->reg_set); |
| |
| fail_ioremap: |
| pci_release_regions(instance->pdev); |
| |
| return -EINVAL; |
| } |
| |
| /** |
| * megasas_release_mfi - Reverses the FW initialization |
| * @intance: Adapter soft state |
| */ |
| static void megasas_release_mfi(struct megasas_instance *instance) |
| { |
| u32 reply_q_sz = sizeof(u32) * (instance->max_fw_cmds + 1); |
| |
| pci_free_consistent(instance->pdev, reply_q_sz, |
| instance->reply_queue, instance->reply_queue_h); |
| |
| megasas_free_cmds(instance); |
| |
| iounmap(instance->reg_set); |
| |
| pci_release_regions(instance->pdev); |
| } |
| |
| /** |
| * megasas_get_seq_num - Gets latest event sequence numbers |
| * @instance: Adapter soft state |
| * @eli: FW event log sequence numbers information |
| * |
| * FW maintains a log of all events in a non-volatile area. Upper layers would |
| * usually find out the latest sequence number of the events, the seq number at |
| * the boot etc. They would "read" all the events below the latest seq number |
| * by issuing a direct fw cmd (DCMD). For the future events (beyond latest seq |
| * number), they would subsribe to AEN (asynchronous event notification) and |
| * wait for the events to happen. |
| */ |
| static int |
| megasas_get_seq_num(struct megasas_instance *instance, |
| struct megasas_evt_log_info *eli) |
| { |
| struct megasas_cmd *cmd; |
| struct megasas_dcmd_frame *dcmd; |
| struct megasas_evt_log_info *el_info; |
| dma_addr_t el_info_h = 0; |
| |
| cmd = megasas_get_cmd(instance); |
| |
| if (!cmd) { |
| return -ENOMEM; |
| } |
| |
| dcmd = &cmd->frame->dcmd; |
| el_info = pci_alloc_consistent(instance->pdev, |
| sizeof(struct megasas_evt_log_info), |
| &el_info_h); |
| |
| if (!el_info) { |
| megasas_return_cmd(instance, cmd); |
| return -ENOMEM; |
| } |
| |
| memset(el_info, 0, sizeof(*el_info)); |
| memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE); |
| |
| dcmd->cmd = MFI_CMD_DCMD; |
| dcmd->cmd_status = 0x0; |
| dcmd->sge_count = 1; |
| dcmd->flags = MFI_FRAME_DIR_READ; |
| dcmd->timeout = 0; |
| dcmd->data_xfer_len = sizeof(struct megasas_evt_log_info); |
| dcmd->opcode = MR_DCMD_CTRL_EVENT_GET_INFO; |
| dcmd->sgl.sge32[0].phys_addr = el_info_h; |
| dcmd->sgl.sge32[0].length = sizeof(struct megasas_evt_log_info); |
| |
| megasas_issue_blocked_cmd(instance, cmd); |
| |
| /* |
| * Copy the data back into callers buffer |
| */ |
| memcpy(eli, el_info, sizeof(struct megasas_evt_log_info)); |
| |
| pci_free_consistent(instance->pdev, sizeof(struct megasas_evt_log_info), |
| el_info, el_info_h); |
| |
| megasas_return_cmd(instance, cmd); |
| |
| return 0; |
| } |
| |
| /** |
| * megasas_register_aen - Registers for asynchronous event notification |
| * @instance: Adapter soft state |
| * @seq_num: The starting sequence number |
| * @class_locale: Class of the event |
| * |
| * This function subscribes for AEN for events beyond the @seq_num. It requests |
| * to be notified if and only if the event is of type @class_locale |
| */ |
| static int |
| megasas_register_aen(struct megasas_instance *instance, u32 seq_num, |
| u32 class_locale_word) |
| { |
| int ret_val; |
| struct megasas_cmd *cmd; |
| struct megasas_dcmd_frame *dcmd; |
| union megasas_evt_class_locale curr_aen; |
| union megasas_evt_class_locale prev_aen; |
| |
| /* |
| * If there an AEN pending already (aen_cmd), check if the |
| * class_locale of that pending AEN is inclusive of the new |
| * AEN request we currently have. If it is, then we don't have |
| * to do anything. In other words, whichever events the current |
| * AEN request is subscribing to, have already been subscribed |
| * to. |
| * |
| * If the old_cmd is _not_ inclusive, then we have to abort |
| * that command, form a class_locale that is superset of both |
| * old and current and re-issue to the FW |
| */ |
| |
| curr_aen.word = class_locale_word; |
| |
| if (instance->aen_cmd) { |
| |
| prev_aen.word = instance->aen_cmd->frame->dcmd.mbox.w[1]; |
| |
| /* |
| * A class whose enum value is smaller is inclusive of all |
| * higher values. If a PROGRESS (= -1) was previously |
| * registered, then a new registration requests for higher |
| * classes need not be sent to FW. They are automatically |
| * included. |
| * |
| * Locale numbers don't have such hierarchy. They are bitmap |
| * values |
| */ |
| if ((prev_aen.members.class <= curr_aen.members.class) && |
| !((prev_aen.members.locale & curr_aen.members.locale) ^ |
| curr_aen.members.locale)) { |
| /* |
| * Previously issued event registration includes |
| * current request. Nothing to do. |
| */ |
| return 0; |
| } else { |
| curr_aen.members.locale |= prev_aen.members.locale; |
| |
| if (prev_aen.members.class < curr_aen.members.class) |
| curr_aen.members.class = prev_aen.members.class; |
| |
| instance->aen_cmd->abort_aen = 1; |
| ret_val = megasas_issue_blocked_abort_cmd(instance, |
| instance-> |
| aen_cmd); |
| |
| if (ret_val) { |
| printk(KERN_DEBUG "megasas: Failed to abort " |
| "previous AEN command\n"); |
| return ret_val; |
| } |
| } |
| } |
| |
| cmd = megasas_get_cmd(instance); |
| |
| if (!cmd) |
| return -ENOMEM; |
| |
| dcmd = &cmd->frame->dcmd; |
| |
| memset(instance->evt_detail, 0, sizeof(struct megasas_evt_detail)); |
| |
| /* |
| * Prepare DCMD for aen registration |
| */ |
| memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE); |
| |
| dcmd->cmd = MFI_CMD_DCMD; |
| dcmd->cmd_status = 0x0; |
| dcmd->sge_count = 1; |
| dcmd->flags = MFI_FRAME_DIR_READ; |
| dcmd->timeout = 0; |
| dcmd->data_xfer_len = sizeof(struct megasas_evt_detail); |
| dcmd->opcode = MR_DCMD_CTRL_EVENT_WAIT; |
| dcmd->mbox.w[0] = seq_num; |
| dcmd->mbox.w[1] = curr_aen.word; |
| dcmd->sgl.sge32[0].phys_addr = (u32) instance->evt_detail_h; |
| dcmd->sgl.sge32[0].length = sizeof(struct megasas_evt_detail); |
| |
| /* |
| * Store reference to the cmd used to register for AEN. When an |
| * application wants us to register for AEN, we have to abort this |
| * cmd and re-register with a new EVENT LOCALE supplied by that app |
| */ |
| instance->aen_cmd = cmd; |
| |
| /* |
| * Issue the aen registration frame |
| */ |
| instance->instancet->fire_cmd(cmd->frame_phys_addr ,0,instance->reg_set); |
| |
| return 0; |
| } |
| |
| /** |
| * megasas_start_aen - Subscribes to AEN during driver load time |
| * @instance: Adapter soft state |
| */ |
| static int megasas_start_aen(struct megasas_instance *instance) |
| { |
| struct megasas_evt_log_info eli; |
| union megasas_evt_class_locale class_locale; |
| |
| /* |
| * Get the latest sequence number from FW |
| */ |
| memset(&eli, 0, sizeof(eli)); |
| |
| if (megasas_get_seq_num(instance, &eli)) |
| return -1; |
| |
| /* |
| * Register AEN with FW for latest sequence number plus 1 |
| */ |
| class_locale.members.reserved = 0; |
| class_locale.members.locale = MR_EVT_LOCALE_ALL; |
| class_locale.members.class = MR_EVT_CLASS_DEBUG; |
| |
| return megasas_register_aen(instance, eli.newest_seq_num + 1, |
| class_locale.word); |
| } |
| |
| /** |
| * megasas_io_attach - Attaches this driver to SCSI mid-layer |
| * @instance: Adapter soft state |
| */ |
| static int megasas_io_attach(struct megasas_instance *instance) |
| { |
| struct Scsi_Host *host = instance->host; |
| |
| /* |
| * Export parameters required by SCSI mid-layer |
| */ |
| host->irq = instance->pdev->irq; |
| host->unique_id = instance->unique_id; |
| host->can_queue = instance->max_fw_cmds - MEGASAS_INT_CMDS; |
| host->this_id = instance->init_id; |
| host->sg_tablesize = instance->max_num_sge; |
| host->max_sectors = instance->max_sectors_per_req; |
| host->cmd_per_lun = 128; |
| host->max_channel = MEGASAS_MAX_CHANNELS - 1; |
| host->max_id = MEGASAS_MAX_DEV_PER_CHANNEL; |
| host->max_lun = MEGASAS_MAX_LUN; |
| host->max_cmd_len = 16; |
| |
| /* |
| * Notify the mid-layer about the new controller |
| */ |
| if (scsi_add_host(host, &instance->pdev->dev)) { |
| printk(KERN_DEBUG "megasas: scsi_add_host failed\n"); |
| return -ENODEV; |
| } |
| |
| /* |
| * Trigger SCSI to scan our drives |
| */ |
| scsi_scan_host(host); |
| return 0; |
| } |
| |
| /** |
| * megasas_probe_one - PCI hotplug entry point |
| * @pdev: PCI device structure |
| * @id: PCI ids of supported hotplugged adapter |
| */ |
| static int __devinit |
| megasas_probe_one(struct pci_dev *pdev, const struct pci_device_id *id) |
| { |
| int rval; |
| struct Scsi_Host *host; |
| struct megasas_instance *instance; |
| |
| /* |
| * Announce PCI information |
| */ |
| printk(KERN_INFO "megasas: %#4.04x:%#4.04x:%#4.04x:%#4.04x: ", |
| pdev->vendor, pdev->device, pdev->subsystem_vendor, |
| pdev->subsystem_device); |
| |
| printk("bus %d:slot %d:func %d\n", |
| pdev->bus->number, PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn)); |
| |
| /* |
| * PCI prepping: enable device set bus mastering and dma mask |
| */ |
| rval = pci_enable_device(pdev); |
| |
| if (rval) { |
| return rval; |
| } |
| |
| pci_set_master(pdev); |
| |
| /* |
| * All our contollers are capable of performing 64-bit DMA |
| */ |
| if (IS_DMA64) { |
| if (pci_set_dma_mask(pdev, DMA_64BIT_MASK) != 0) { |
| |
| if (pci_set_dma_mask(pdev, DMA_32BIT_MASK) != 0) |
| goto fail_set_dma_mask; |
| } |
| } else { |
| if (pci_set_dma_mask(pdev, DMA_32BIT_MASK) != 0) |
| goto fail_set_dma_mask; |
| } |
| |
| host = scsi_host_alloc(&megasas_template, |
| sizeof(struct megasas_instance)); |
| |
| if (!host) { |
| printk(KERN_DEBUG "megasas: scsi_host_alloc failed\n"); |
| goto fail_alloc_instance; |
| } |
| |
| instance = (struct megasas_instance *)host->hostdata; |
| memset(instance, 0, sizeof(*instance)); |
| |
| instance->producer = pci_alloc_consistent(pdev, sizeof(u32), |
| &instance->producer_h); |
| instance->consumer = pci_alloc_consistent(pdev, sizeof(u32), |
| &instance->consumer_h); |
| |
| if (!instance->producer || !instance->consumer) { |
| printk(KERN_DEBUG "megasas: Failed to allocate memory for " |
| "producer, consumer\n"); |
| goto fail_alloc_dma_buf; |
| } |
| |
| *instance->producer = 0; |
| *instance->consumer = 0; |
| |
| instance->evt_detail = pci_alloc_consistent(pdev, |
| sizeof(struct |
| megasas_evt_detail), |
| &instance->evt_detail_h); |
| |
| if (!instance->evt_detail) { |
| printk(KERN_DEBUG "megasas: Failed to allocate memory for " |
| "event detail structure\n"); |
| goto fail_alloc_dma_buf; |
| } |
| |
| /* |
| * Initialize locks and queues |
| */ |
| INIT_LIST_HEAD(&instance->cmd_pool); |
| |
| init_waitqueue_head(&instance->int_cmd_wait_q); |
| init_waitqueue_head(&instance->abort_cmd_wait_q); |
| |
| spin_lock_init(&instance->cmd_pool_lock); |
| spin_lock_init(&instance->instance_lock); |
| |
| sema_init(&instance->aen_mutex, 1); |
| sema_init(&instance->ioctl_sem, MEGASAS_INT_CMDS); |
| |
| /* |
| * Initialize PCI related and misc parameters |
| */ |
| instance->pdev = pdev; |
| instance->host = host; |
| instance->unique_id = pdev->bus->number << 8 | pdev->devfn; |
| instance->init_id = MEGASAS_DEFAULT_INIT_ID; |
| |
| /* |
| * Initialize MFI Firmware |
| */ |
| if (megasas_init_mfi(instance)) |
| goto fail_init_mfi; |
| |
| /* |
| * Register IRQ |
| */ |
| if (request_irq(pdev->irq, megasas_isr, SA_SHIRQ, "megasas", instance)) { |
| printk(KERN_DEBUG "megasas: Failed to register IRQ\n"); |
| goto fail_irq; |
| } |
| |
| instance->instancet->enable_intr(instance->reg_set); |
| |
| /* |
| * Store instance in PCI softstate |
| */ |
| pci_set_drvdata(pdev, instance); |
| |
| /* |
| * Add this controller to megasas_mgmt_info structure so that it |
| * can be exported to management applications |
| */ |
| megasas_mgmt_info.count++; |
| megasas_mgmt_info.instance[megasas_mgmt_info.max_index] = instance; |
| megasas_mgmt_info.max_index++; |
| |
| /* |
| * Initiate AEN (Asynchronous Event Notification) |
| */ |
| if (megasas_start_aen(instance)) { |
| printk(KERN_DEBUG "megasas: start aen failed\n"); |
| goto fail_start_aen; |
| } |
| |
| /* |
| * Register with SCSI mid-layer |
| */ |
| if (megasas_io_attach(instance)) |
| goto fail_io_attach; |
| |
| return 0; |
| |
| fail_start_aen: |
| fail_io_attach: |
| megasas_mgmt_info.count--; |
| megasas_mgmt_info.instance[megasas_mgmt_info.max_index] = NULL; |
| megasas_mgmt_info.max_index--; |
| |
| pci_set_drvdata(pdev, NULL); |
| megasas_disable_intr(instance->reg_set); |
| free_irq(instance->pdev->irq, instance); |
| |
| megasas_release_mfi(instance); |
| |
| fail_irq: |
| fail_init_mfi: |
| fail_alloc_dma_buf: |
| if (instance->evt_detail) |
| pci_free_consistent(pdev, sizeof(struct megasas_evt_detail), |
| instance->evt_detail, |
| instance->evt_detail_h); |
| |
| if (instance->producer) |
| pci_free_consistent(pdev, sizeof(u32), instance->producer, |
| instance->producer_h); |
| if (instance->consumer) |
| pci_free_consistent(pdev, sizeof(u32), instance->consumer, |
| instance->consumer_h); |
| scsi_host_put(host); |
| |
| fail_alloc_instance: |
| fail_set_dma_mask: |
| pci_disable_device(pdev); |
| |
| return -ENODEV; |
| } |
| |
| /** |
| * megasas_flush_cache - Requests FW to flush all its caches |
| * @instance: Adapter soft state |
| */ |
| static void megasas_flush_cache(struct megasas_instance *instance) |
| { |
| struct megasas_cmd *cmd; |
| struct megasas_dcmd_frame *dcmd; |
| |
| cmd = megasas_get_cmd(instance); |
| |
| if (!cmd) |
| return; |
| |
| dcmd = &cmd->frame->dcmd; |
| |
| memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE); |
| |
| dcmd->cmd = MFI_CMD_DCMD; |
| dcmd->cmd_status = 0x0; |
| dcmd->sge_count = 0; |
| dcmd->flags = MFI_FRAME_DIR_NONE; |
| dcmd->timeout = 0; |
| dcmd->data_xfer_len = 0; |
| dcmd->opcode = MR_DCMD_CTRL_CACHE_FLUSH; |
| dcmd->mbox.b[0] = MR_FLUSH_CTRL_CACHE | MR_FLUSH_DISK_CACHE; |
| |
| megasas_issue_blocked_cmd(instance, cmd); |
| |
| megasas_return_cmd(instance, cmd); |
| |
| return; |
| } |
| |
| /** |
| * megasas_shutdown_controller - Instructs FW to shutdown the controller |
| * @instance: Adapter soft state |
| */ |
| static void megasas_shutdown_controller(struct megasas_instance *instance) |
| { |
| struct megasas_cmd *cmd; |
| struct megasas_dcmd_frame *dcmd; |
| |
| cmd = megasas_get_cmd(instance); |
| |
| if (!cmd) |
| return; |
| |
| if (instance->aen_cmd) |
| megasas_issue_blocked_abort_cmd(instance, instance->aen_cmd); |
| |
| dcmd = &cmd->frame->dcmd; |
| |
| memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE); |
| |
| dcmd->cmd = MFI_CMD_DCMD; |
| dcmd->cmd_status = 0x0; |
| dcmd->sge_count = 0; |
| dcmd->flags = MFI_FRAME_DIR_NONE; |
| dcmd->timeout = 0; |
| dcmd->data_xfer_len = 0; |
| dcmd->opcode = MR_DCMD_CTRL_SHUTDOWN; |
| |
| megasas_issue_blocked_cmd(instance, cmd); |
| |
| megasas_return_cmd(instance, cmd); |
| |
| return; |
| } |
| |
| /** |
| * megasas_detach_one - PCI hot"un"plug entry point |
| * @pdev: PCI device structure |
| */ |
| static void megasas_detach_one(struct pci_dev *pdev) |
| { |
| int i; |
| struct Scsi_Host *host; |
| struct megasas_instance *instance; |
| |
| instance = pci_get_drvdata(pdev); |
| host = instance->host; |
| |
| scsi_remove_host(instance->host); |
| megasas_flush_cache(instance); |
| megasas_shutdown_controller(instance); |
| |
| /* |
| * Take the instance off the instance array. Note that we will not |
| * decrement the max_index. We let this array be sparse array |
| */ |
| for (i = 0; i < megasas_mgmt_info.max_index; i++) { |
| if (megasas_mgmt_info.instance[i] == instance) { |
| megasas_mgmt_info.count--; |
| megasas_mgmt_info.instance[i] = NULL; |
| |
| break; |
| } |
| } |
| |
| pci_set_drvdata(instance->pdev, NULL); |
| |
| megasas_disable_intr(instance->reg_set); |
| |
| free_irq(instance->pdev->irq, instance); |
| |
| megasas_release_mfi(instance); |
| |
| pci_free_consistent(pdev, sizeof(struct megasas_evt_detail), |
| instance->evt_detail, instance->evt_detail_h); |
| |
| pci_free_consistent(pdev, sizeof(u32), instance->producer, |
| instance->producer_h); |
| |
| pci_free_consistent(pdev, sizeof(u32), instance->consumer, |
| instance->consumer_h); |
| |
| scsi_host_put(host); |
| |
| pci_set_drvdata(pdev, NULL); |
| |
| pci_disable_device(pdev); |
| |
| return; |
| } |
| |
| /** |
| * megasas_shutdown - Shutdown entry point |
| * @device: Generic device structure |
| */ |
| static void megasas_shutdown(struct pci_dev *pdev) |
| { |
| struct megasas_instance *instance = pci_get_drvdata(pdev); |
| megasas_flush_cache(instance); |
| } |
| |
| /** |
| * megasas_mgmt_open - char node "open" entry point |
| */ |
| static int megasas_mgmt_open(struct inode *inode, struct file *filep) |
| { |
| /* |
| * Allow only those users with admin rights |
| */ |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EACCES; |
| |
| return 0; |
| } |
| |
| /** |
| * megasas_mgmt_release - char node "release" entry point |
| */ |
| static int megasas_mgmt_release(struct inode *inode, struct file *filep) |
| { |
| filep->private_data = NULL; |
| fasync_helper(-1, filep, 0, &megasas_async_queue); |
| |
| return 0; |
| } |
| |
| /** |
| * megasas_mgmt_fasync - Async notifier registration from applications |
| * |
| * This function adds the calling process to a driver global queue. When an |
| * event occurs, SIGIO will be sent to all processes in this queue. |
| */ |
| static int megasas_mgmt_fasync(int fd, struct file *filep, int mode) |
| { |
| int rc; |
| |
| mutex_lock(&megasas_async_queue_mutex); |
| |
| rc = fasync_helper(fd, filep, mode, &megasas_async_queue); |
| |
| mutex_unlock(&megasas_async_queue_mutex); |
| |
| if (rc >= 0) { |
| /* For sanity check when we get ioctl */ |
| filep->private_data = filep; |
| return 0; |
| } |
| |
| printk(KERN_DEBUG "megasas: fasync_helper failed [%d]\n", rc); |
| |
| return rc; |
| } |
| |
| /** |
| * megasas_mgmt_fw_ioctl - Issues management ioctls to FW |
| * @instance: Adapter soft state |
| * @argp: User's ioctl packet |
| */ |
| static int |
| megasas_mgmt_fw_ioctl(struct megasas_instance *instance, |
| struct megasas_iocpacket __user * user_ioc, |
| struct megasas_iocpacket *ioc) |
| { |
| struct megasas_sge32 *kern_sge32; |
| struct megasas_cmd *cmd; |
| void *kbuff_arr[MAX_IOCTL_SGE]; |
| dma_addr_t buf_handle = 0; |
| int error = 0, i; |
| void *sense = NULL; |
| dma_addr_t sense_handle; |
| u32 *sense_ptr; |
| |
| memset(kbuff_arr, 0, sizeof(kbuff_arr)); |
| |
| if (ioc->sge_count > MAX_IOCTL_SGE) { |
| printk(KERN_DEBUG "megasas: SGE count [%d] > max limit [%d]\n", |
| ioc->sge_count, MAX_IOCTL_SGE); |
| return -EINVAL; |
| } |
| |
| cmd = megasas_get_cmd(instance); |
| if (!cmd) { |
| printk(KERN_DEBUG "megasas: Failed to get a cmd packet\n"); |
| return -ENOMEM; |
| } |
| |
| /* |
| * User's IOCTL packet has 2 frames (maximum). Copy those two |
| * frames into our cmd's frames. cmd->frame's context will get |
| * overwritten when we copy from user's frames. So set that value |
| * alone separately |
| */ |
| memcpy(cmd->frame, ioc->frame.raw, 2 * MEGAMFI_FRAME_SIZE); |
| cmd->frame->hdr.context = cmd->index; |
| |
| /* |
| * The management interface between applications and the fw uses |
| * MFI frames. E.g, RAID configuration changes, LD property changes |
| * etc are accomplishes through different kinds of MFI frames. The |
| * driver needs to care only about substituting user buffers with |
| * kernel buffers in SGLs. The location of SGL is embedded in the |
| * struct iocpacket itself. |
| */ |
| kern_sge32 = (struct megasas_sge32 *) |
| ((unsigned long)cmd->frame + ioc->sgl_off); |
| |
| /* |
| * For each user buffer, create a mirror buffer and copy in |
| */ |
| for (i = 0; i < ioc->sge_count; i++) { |
| kbuff_arr[i] = pci_alloc_consistent(instance->pdev, |
| ioc->sgl[i].iov_len, |
| &buf_handle); |
| if (!kbuff_arr[i]) { |
| printk(KERN_DEBUG "megasas: Failed to alloc " |
| "kernel SGL buffer for IOCTL \n"); |
| error = -ENOMEM; |
| goto out; |
| } |
| |
| /* |
| * We don't change the dma_coherent_mask, so |
| * pci_alloc_consistent only returns 32bit addresses |
| */ |
| kern_sge32[i].phys_addr = (u32) buf_handle; |
| kern_sge32[i].length = ioc->sgl[i].iov_len; |
| |
| /* |
| * We created a kernel buffer corresponding to the |
| * user buffer. Now copy in from the user buffer |
| */ |
| if (copy_from_user(kbuff_arr[i], ioc->sgl[i].iov_base, |
| (u32) (ioc->sgl[i].iov_len))) { |
| error = -EFAULT; |
| goto out; |
| } |
| } |
| |
| if (ioc->sense_len) { |
| sense = pci_alloc_consistent(instance->pdev, ioc->sense_len, |
| &sense_handle); |
| if (!sense) { |
| error = -ENOMEM; |
| goto out; |
| } |
| |
| sense_ptr = |
| (u32 *) ((unsigned long)cmd->frame + ioc->sense_off); |
| *sense_ptr = sense_handle; |
| } |
| |
| /* |
| * Set the sync_cmd flag so that the ISR knows not to complete this |
| * cmd to the SCSI mid-layer |
| */ |
| cmd->sync_cmd = 1; |
| megasas_issue_blocked_cmd(instance, cmd); |
| cmd->sync_cmd = 0; |
| |
| /* |
| * copy out the kernel buffers to user buffers |
| */ |
| for (i = 0; i < ioc->sge_count; i++) { |
| if (copy_to_user(ioc->sgl[i].iov_base, kbuff_arr[i], |
| ioc->sgl[i].iov_len)) { |
| error = -EFAULT; |
| goto out; |
| } |
| } |
| |
| /* |
| * copy out the sense |
| */ |
| if (ioc->sense_len) { |
| /* |
| * sense_ptr points to the location that has the user |
| * sense buffer address |
| */ |
| sense_ptr = (u32 *) ((unsigned long)ioc->frame.raw + |
| ioc->sense_off); |
| |
| if (copy_to_user((void __user *)((unsigned long)(*sense_ptr)), |
| sense, ioc->sense_len)) { |
| error = -EFAULT; |
| goto out; |
| } |
| } |
| |
| /* |
| * copy the status codes returned by the fw |
| */ |
| if (copy_to_user(&user_ioc->frame.hdr.cmd_status, |
| &cmd->frame->hdr.cmd_status, sizeof(u8))) { |
| printk(KERN_DEBUG "megasas: Error copying out cmd_status\n"); |
| error = -EFAULT; |
| } |
| |
| out: |
| if (sense) { |
| pci_free_consistent(instance->pdev, ioc->sense_len, |
| sense, sense_handle); |
| } |
| |
| for (i = 0; i < ioc->sge_count && kbuff_arr[i]; i++) { |
| pci_free_consistent(instance->pdev, |
| kern_sge32[i].length, |
| kbuff_arr[i], kern_sge32[i].phys_addr); |
| } |
| |
| megasas_return_cmd(instance, cmd); |
| return error; |
| } |
| |
| static struct megasas_instance *megasas_lookup_instance(u16 host_no) |
| { |
| int i; |
| |
| for (i = 0; i < megasas_mgmt_info.max_index; i++) { |
| |
| if ((megasas_mgmt_info.instance[i]) && |
| (megasas_mgmt_info.instance[i]->host->host_no == host_no)) |
| return megasas_mgmt_info.instance[i]; |
| } |
| |
| return NULL; |
| } |
| |
| static int megasas_mgmt_ioctl_fw(struct file *file, unsigned long arg) |
| { |
| struct megasas_iocpacket __user *user_ioc = |
| (struct megasas_iocpacket __user *)arg; |
| struct megasas_iocpacket *ioc; |
| struct megasas_instance *instance; |
| int error; |
| |
| ioc = kmalloc(sizeof(*ioc), GFP_KERNEL); |
| if (!ioc) |
| return -ENOMEM; |
| |
| if (copy_from_user(ioc, user_ioc, sizeof(*ioc))) { |
| error = -EFAULT; |
| goto out_kfree_ioc; |
| } |
| |
| instance = megasas_lookup_instance(ioc->host_no); |
| if (!instance) { |
| error = -ENODEV; |
| goto out_kfree_ioc; |
| } |
| |
| /* |
| * We will allow only MEGASAS_INT_CMDS number of parallel ioctl cmds |
| */ |
| if (down_interruptible(&instance->ioctl_sem)) { |
| error = -ERESTARTSYS; |
| goto out_kfree_ioc; |
| } |
| error = megasas_mgmt_fw_ioctl(instance, user_ioc, ioc); |
| up(&instance->ioctl_sem); |
| |
| out_kfree_ioc: |
| kfree(ioc); |
| return error; |
| } |
| |
| static int megasas_mgmt_ioctl_aen(struct file *file, unsigned long arg) |
| { |
| struct megasas_instance *instance; |
| struct megasas_aen aen; |
| int error; |
| |
| if (file->private_data != file) { |
| printk(KERN_DEBUG "megasas: fasync_helper was not " |
| "called first\n"); |
| return -EINVAL; |
| } |
| |
| if (copy_from_user(&aen, (void __user *)arg, sizeof(aen))) |
| return -EFAULT; |
| |
| instance = megasas_lookup_instance(aen.host_no); |
| |
| if (!instance) |
| return -ENODEV; |
| |
| down(&instance->aen_mutex); |
| error = megasas_register_aen(instance, aen.seq_num, |
| aen.class_locale_word); |
| up(&instance->aen_mutex); |
| return error; |
| } |
| |
| /** |
| * megasas_mgmt_ioctl - char node ioctl entry point |
| */ |
| static long |
| megasas_mgmt_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
| { |
| switch (cmd) { |
| case MEGASAS_IOC_FIRMWARE: |
| return megasas_mgmt_ioctl_fw(file, arg); |
| |
| case MEGASAS_IOC_GET_AEN: |
| return megasas_mgmt_ioctl_aen(file, arg); |
| } |
| |
| return -ENOTTY; |
| } |
| |
| #ifdef CONFIG_COMPAT |
| static int megasas_mgmt_compat_ioctl_fw(struct file *file, unsigned long arg) |
| { |
| struct compat_megasas_iocpacket __user *cioc = |
| (struct compat_megasas_iocpacket __user *)arg; |
| struct megasas_iocpacket __user *ioc = |
| compat_alloc_user_space(sizeof(struct megasas_iocpacket)); |
| int i; |
| int error = 0; |
| |
| clear_user(ioc, sizeof(*ioc)); |
| |
| if (copy_in_user(&ioc->host_no, &cioc->host_no, sizeof(u16)) || |
| copy_in_user(&ioc->sgl_off, &cioc->sgl_off, sizeof(u32)) || |
| copy_in_user(&ioc->sense_off, &cioc->sense_off, sizeof(u32)) || |
| copy_in_user(&ioc->sense_len, &cioc->sense_len, sizeof(u32)) || |
| copy_in_user(ioc->frame.raw, cioc->frame.raw, 128) || |
| copy_in_user(&ioc->sge_count, &cioc->sge_count, sizeof(u32))) |
| return -EFAULT; |
| |
| for (i = 0; i < MAX_IOCTL_SGE; i++) { |
| compat_uptr_t ptr; |
| |
| if (get_user(ptr, &cioc->sgl[i].iov_base) || |
| put_user(compat_ptr(ptr), &ioc->sgl[i].iov_base) || |
| copy_in_user(&ioc->sgl[i].iov_len, |
| &cioc->sgl[i].iov_len, sizeof(compat_size_t))) |
| return -EFAULT; |
| } |
| |
| error = megasas_mgmt_ioctl_fw(file, (unsigned long)ioc); |
| |
| if (copy_in_user(&cioc->frame.hdr.cmd_status, |
| &ioc->frame.hdr.cmd_status, sizeof(u8))) { |
| printk(KERN_DEBUG "megasas: error copy_in_user cmd_status\n"); |
| return -EFAULT; |
| } |
| return error; |
| } |
| |
| static long |
| megasas_mgmt_compat_ioctl(struct file *file, unsigned int cmd, |
| unsigned long arg) |
| { |
| switch (cmd) { |
| case MEGASAS_IOC_FIRMWARE32: |
| return megasas_mgmt_compat_ioctl_fw(file, arg); |
| case MEGASAS_IOC_GET_AEN: |
| return megasas_mgmt_ioctl_aen(file, arg); |
| } |
| |
| return -ENOTTY; |
| } |
| #endif |
| |
| /* |
| * File operations structure for management interface |
| */ |
| static struct file_operations megasas_mgmt_fops = { |
| .owner = THIS_MODULE, |
| .open = megasas_mgmt_open, |
| .release = megasas_mgmt_release, |
| .fasync = megasas_mgmt_fasync, |
| .unlocked_ioctl = megasas_mgmt_ioctl, |
| #ifdef CONFIG_COMPAT |
| .compat_ioctl = megasas_mgmt_compat_ioctl, |
| #endif |
| }; |
| |
| /* |
| * PCI hotplug support registration structure |
| */ |
| static struct pci_driver megasas_pci_driver = { |
| |
| .name = "megaraid_sas", |
| .id_table = megasas_pci_table, |
| .probe = megasas_probe_one, |
| .remove = __devexit_p(megasas_detach_one), |
| .shutdown = megasas_shutdown, |
| }; |
| |
| /* |
| * Sysfs driver attributes |
| */ |
| static ssize_t megasas_sysfs_show_version(struct device_driver *dd, char *buf) |
| { |
| return snprintf(buf, strlen(MEGASAS_VERSION) + 2, "%s\n", |
| MEGASAS_VERSION); |
| } |
| |
| static DRIVER_ATTR(version, S_IRUGO, megasas_sysfs_show_version, NULL); |
| |
| static ssize_t |
| megasas_sysfs_show_release_date(struct device_driver *dd, char *buf) |
| { |
| return snprintf(buf, strlen(MEGASAS_RELDATE) + 2, "%s\n", |
| MEGASAS_RELDATE); |
| } |
| |
| static DRIVER_ATTR(release_date, S_IRUGO, megasas_sysfs_show_release_date, |
| NULL); |
| |
| /** |
| * megasas_init - Driver load entry point |
| */ |
| static int __init megasas_init(void) |
| { |
| int rval; |
| |
| /* |
| * Announce driver version and other information |
| */ |
| printk(KERN_INFO "megasas: %s %s\n", MEGASAS_VERSION, |
| MEGASAS_EXT_VERSION); |
| |
| memset(&megasas_mgmt_info, 0, sizeof(megasas_mgmt_info)); |
| |
| /* |
| * Register character device node |
| */ |
| rval = register_chrdev(0, "megaraid_sas_ioctl", &megasas_mgmt_fops); |
| |
| if (rval < 0) { |
| printk(KERN_DEBUG "megasas: failed to open device node\n"); |
| return rval; |
| } |
| |
| megasas_mgmt_majorno = rval; |
| |
| /* |
| * Register ourselves as PCI hotplug module |
| */ |
| rval = pci_module_init(&megasas_pci_driver); |
| |
| if (rval) { |
| printk(KERN_DEBUG "megasas: PCI hotplug regisration failed \n"); |
| unregister_chrdev(megasas_mgmt_majorno, "megaraid_sas_ioctl"); |
| } |
| |
| driver_create_file(&megasas_pci_driver.driver, &driver_attr_version); |
| driver_create_file(&megasas_pci_driver.driver, |
| &driver_attr_release_date); |
| |
| return rval; |
| } |
| |
| /** |
| * megasas_exit - Driver unload entry point |
| */ |
| static void __exit megasas_exit(void) |
| { |
| driver_remove_file(&megasas_pci_driver.driver, &driver_attr_version); |
| driver_remove_file(&megasas_pci_driver.driver, |
| &driver_attr_release_date); |
| |
| pci_unregister_driver(&megasas_pci_driver); |
| unregister_chrdev(megasas_mgmt_majorno, "megaraid_sas_ioctl"); |
| } |
| |
| module_init(megasas_init); |
| module_exit(megasas_exit); |