diff options
Diffstat (limited to 'drivers/scsi/megaraid/megaraid_sas.c')
| -rw-r--r-- | drivers/scsi/megaraid/megaraid_sas.c | 2869 |
1 files changed, 0 insertions, 2869 deletions
diff --git a/drivers/scsi/megaraid/megaraid_sas.c b/drivers/scsi/megaraid/megaraid_sas.c deleted file mode 100644 index 4cab5b534b2..00000000000 --- a/drivers/scsi/megaraid/megaraid_sas.c +++ /dev/null @@ -1,2869 +0,0 @@ -/* - * - * 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 : v00.00.03.01 - * - * 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_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS1064R)}, - /* xscale IOP */ - {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS1078R)}, - /* ppc IOP */ - {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_VERDE_ZCR)}, - /* xscale IOP, vega */ - {PCI_DEVICE(PCI_VENDOR_ID_DELL, PCI_DEVICE_ID_DELL_PERC5)}, - /* xscale IOP */ - {} -}; - -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 -*/ - -/** -* The following functions are defined for ppc (deviceid : 0x60) -* controllers -*/ - -/** - * megasas_enable_intr_ppc - Enables interrupts - * @regs: MFI register set - */ -static inline void -megasas_enable_intr_ppc(struct megasas_register_set __iomem * regs) -{ - writel(0xFFFFFFFF, &(regs)->outbound_doorbell_clear); - - writel(~0x80000004, &(regs)->outbound_intr_mask); - - /* Dummy readl to force pci flush */ - readl(®s->outbound_intr_mask); -} - -/** - * megasas_read_fw_status_reg_ppc - returns the current FW status value - * @regs: MFI register set - */ -static u32 -megasas_read_fw_status_reg_ppc(struct megasas_register_set __iomem * regs) -{ - return readl(&(regs)->outbound_scratch_pad); -} - -/** - * megasas_clear_interrupt_ppc - Check & clear interrupt - * @regs: MFI register set - */ -static int -megasas_clear_intr_ppc(struct megasas_register_set __iomem * regs) -{ - u32 status; - /* - * Check if it is our interrupt - */ - status = readl(®s->outbound_intr_status); - - if (!(status & MFI_REPLY_1078_MESSAGE_INTERRUPT)) { - return 1; - } - - /* - * Clear the interrupt by writing back the same value - */ - writel(status, ®s->outbound_doorbell_clear); - - return 0; -} -/** - * megasas_fire_cmd_ppc - 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_ppc(dma_addr_t frame_phys_addr, u32 frame_count, struct megasas_register_set __iomem *regs) -{ - writel((frame_phys_addr | (frame_count<<1))|1, - &(regs)->inbound_queue_port); -} - -static struct megasas_instance_template megasas_instance_template_ppc = { - - .fire_cmd = megasas_fire_cmd_ppc, - .enable_intr = megasas_enable_intr_ppc, - .clear_intr = megasas_clear_intr_ppc, - .read_fw_status_reg = megasas_read_fw_status_reg_ppc, -}; - -/** -* This is the end of set of functions & definitions -* specific to ppc (deviceid : 0x60) controllers -*/ - -/** - * megasas_disable_intr - Disables interrupts - * @regs: MFI register set - */ -static inline void -megasas_disable_intr(struct megasas_instance *instance) -{ - u32 mask = 0x1f; - struct megasas_register_set __iomem *regs = instance->reg_set; - - if(instance->pdev->device == PCI_DEVICE_ID_LSI_SAS1078R) - mask = 0xffffffff; - - 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; - 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; - - /* - * Issue the command to the FW - */ - atomic_inc(&instance->fw_outstanding); - - 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; -} - -static int megasas_slave_configure(struct scsi_device *sdev) -{ - /* - * Don't export physical disk devices to the disk driver. - * - * FIXME: Currently we don't export them to the midlayer at all. - * That will be fixed once LSI engineers have audited the - * firmware for possible issues. - */ - if (sdev->channel < MEGASAS_MAX_PD_CHANNELS && sdev->type == TYPE_DISK) - return -ENXIO; - - /* - * The RAID firmware may require extended timeouts. - */ - if (sdev->channel >= MEGASAS_MAX_PD_CHANNELS) - sdev->timeout = 90 * HZ; - 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++) { - - int outstanding = atomic_read(&instance->fw_outstanding); - - if (!outstanding) - break; - - if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) { - printk(KERN_NOTICE "megasas: [%2d]waiting for %d " - "commands to complete\n",i,outstanding); - } - - msleep(1000); - } - - if (atomic_read(&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; -} - -/** - * 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; - - /* - * First 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", - .slave_configure = megasas_slave_configure, - .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, - .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; - - 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; - } - - case MFI_CMD_LD_READ: - case MFI_CMD_LD_WRITE: - - if (alt_status) { - cmd->scmd->result = alt_status << 16; - exception = 1; - } - - if (exception) { - - atomic_dec(&instance->fw_outstanding); - - 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; - } - - atomic_dec(&instance->fw_outstanding); - - 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); - 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; - - switch(instance->pdev->device) - { - case PCI_DEVICE_ID_LSI_SAS1078R: - instance->instancet = &megasas_instance_template_ppc; - break; - case PCI_DEVICE_ID_LSI_SAS1064R: - case PCI_DEVICE_ID_DELL_PERC5: - default: - instance->instancet = &megasas_instance_template_xscale; - break; - } - - /* - * 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); - - /* - * disable the intr before firing the init frame to FW - */ - megasas_disable_intr(instance); - - /* - * 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); - - atomic_set(&instance->fw_outstanding,0); - - init_waitqueue_head(&instance->int_cmd_wait_q); - init_waitqueue_head(&instance->abort_cmd_wait_q); - - spin_lock_init(&instance->cmd_pool_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, IRQF_SHARED, "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); - 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); - - 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_register_driver(&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); |