Signed-off-by: Sreenivas Bagalkote <[email protected]>
diff -Naur scsi-misc.b/drivers/scsi/megaraid/megaraid_sas.c
scsi-misc.c/drivers/scsi/megaraid/megaraid_sas.c
--- scsi-misc.b/drivers/scsi/megaraid/megaraid_sas.c 1969-12-31
19:00:00.000000000 -0500
+++ scsi-misc.c/drivers/scsi/megaraid/megaraid_sas.c 2005-06-03
20:36:06.657461568 -0400
@@ -0,0 +1,3437 @@
+/*
+ *
+ * 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 : v00.00.01.03-rc1
+ *
+ * Authors:
+ * Sreenivas Bagalkote <[email protected]>
+ *
+ * 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/version.h>
+#include <linux/moduleparam.h>
+#include <linux/module.h>
+#include <linux/spinlock.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <asm/uaccess.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("[email protected]");
+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,
+ PCI_ANY_ID,
+ PCI_ANY_ID,
+ },
+ {
+ PCI_VENDOR_ID_DELL,
+ PCI_DEVICE_ID_DELL_PERC5,
+ 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 DECLARE_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 inline 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 );
+ }
+
+ 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);
+
+ list_add(&cmd->list, &instance->cmd_pool);
+
+ spin_unlock_irqrestore(&instance->cmd_pool_lock, flags);
+}
+
+/**
+ * megasas_enable_intr - Enables interrupts
+ * @regs: MFI register set
+ */
+static inline void
+megasas_enable_intr(struct megasas_register_set *regs)
+{
+ writel(1, &(regs)->outbound_intr_mask);
+
+ /* Dummy readl to force pci flush */
+ readl(®s->outbound_intr_mask);
+}
+
+/**
+ * megasas_disable_intr - Disables interrupts
+ * @regs: MFI register set
+ */
+static inline void
+megasas_disable_intr(struct megasas_register_set *regs)
+{
+ u32 mask = readl(®s->outbound_intr_mask) & (~0x00000001);
+ 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
+ */
+ writel(cmd->frame_phys_addr >> 3,
+ &instance->reg_set->inbound_queue_port);
+
+ /*
+ * 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;
+
+ writel(cmd->frame_phys_addr >> 3,
+ &instance->reg_set->inbound_queue_port);
+
+ 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;
+
+ writel(cmd->frame_phys_addr >> 3,
+ &instance->reg_set->inbound_queue_port);
+
+ /*
+ * Wait for this cmd to complete
+ */
+ cmd->sync_cmd = 1;
+ 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 inline 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 inline 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 inline 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 inline 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_build_cmd - Prepares a command packet
+ * @instance: Adapter soft state
+ * @scp: SCSI command
+ * @frame_count: [OUT] Number of frames used to prepare this command
+ */
+static inline struct megasas_cmd*
+megasas_build_cmd(struct megasas_instance *instance, struct scsi_cmnd *scp,
+ int *frame_count )
+{
+ u32 logical_cmd;
+ struct megasas_cmd *cmd;
+
+ /*
+ * Find out if this is logical or physical drive command.
+ */
+ logical_cmd = MEGASAS_IS_LOGICAL(scp);
+
+ /*
+ * Logical drive command
+ */
+ if (logical_cmd) {
+
+ if (scp->device->id >= MEGASAS_MAX_LD) {
+ scp->result = DID_BAD_TARGET << 16;
+ return NULL;
+ }
+
+ switch(scp->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:
+ /*
+ * Fail for LUN > 0
+ */
+ if (scp->device->lun) {
+ scp->result = DID_BAD_TARGET << 16;
+ return NULL;
+ }
+
+ cmd = megasas_get_cmd(instance);
+
+ if (!cmd) {
+ scp->result = DID_IMM_RETRY << 16;
+ return NULL;
+ }
+
+ *frame_count = megasas_build_ldio(instance, scp,
cmd);
+
+ if (! (*frame_count) ) {
+ megasas_return_cmd( instance, cmd );
+ return NULL;
+ }
+
+ return cmd;
+
+ default:
+ /*
+ * Fail for LUN > 0
+ */
+ if (scp->device->lun) {
+ scp->result = DID_BAD_TARGET << 16;
+ return NULL;
+ }
+
+ cmd = megasas_get_cmd(instance);
+
+ if (!cmd) {
+ scp->result = DID_IMM_RETRY << 16;
+ return NULL;
+ }
+
+ *frame_count = megasas_build_dcdb(instance, scp,
cmd);
+
+ if (! (*frame_count) ) {
+ megasas_return_cmd(instance, cmd);
+ return NULL;
+ }
+
+ return cmd;
+ }
+ }
+ else {
+ cmd = megasas_get_cmd(instance);
+
+ if (!cmd) {
+ scp->result = DID_IMM_RETRY << 16;
+ return NULL;
+ }
+
+ *frame_count = megasas_build_dcdb(instance, scp, cmd);
+
+ if (!(*frame_count)) {
+ megasas_return_cmd(instance, cmd);
+ return NULL;
+ }
+
+ return cmd;
+ }
+
+ return NULL;
+}
+
+/**
+ * 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;
+
+ cmd = megasas_build_cmd( instance, scmd, &frame_count );
+
+ if (!cmd) {
+ done(scmd);
+ return 0;
+ }
+
+ cmd->scmd = scmd;
+
+ /*
+ * Issue the command to the FW
+ */
+ spin_lock_irqsave(&instance->instance_lock, flags);
+ instance->fw_outstanding++;
+ spin_unlock_irqrestore(&instance->instance_lock, flags);
+
+ writel(((cmd->frame_phys_addr >> 3) | (cmd->frame_count - 1)),
+ &instance->reg_set->inbound_queue_port );
+
+ 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;
+
+ printk(KERN_NOTICE "megasas: RESET -%ld cmd=%x <c=%d t=%d l=%d>\n",
+ scmd->serial_number, scmd->cmnd[0], scmd->device->channel,
+ scmd->device->id, scmd->device->lun);
+
+ if (instance->hw_crit_error) {
+ printk(KERN_ERR "megasas: cannot recover from previous reset
"
+
"failures\n");
+ return FAILED;
+ }
+
+ spin_unlock(scmd->device->host->host_lock);
+
+ 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");
+
+ spin_lock(scmd->device->host->host_lock);
+
+ return ret_val;
+}
+
+/**
+ * megasas_reset_device - Device reset handler entry point
+ *
+ * Issues CLUSTER_RESET_LD (FW direct cmd) before calling generic reset fn.
+ */
+static int
+megasas_reset_device(struct scsi_cmnd *scmd)
+{
+ int ret;
+ struct megasas_cmd *cmd;
+ struct megasas_dcmd_frame *dcmd;
+ struct megasas_instance *instance;
+
+ /*
+ * First wait for all commands to complete
+ */
+ ret = megasas_generic_reset(scmd);
+
+ if (ret == FAILED)
+ return ret;
+
+ /*
+ * Reset reservations on LD
+ */
+ instance = (struct megasas_instance*)scmd->device->host->hostdata;
+
+ cmd = megasas_get_cmd(instance);
+
+ if (cmd) {
+
+ dcmd = &cmd->frame->dcmd;
+
+ memset( dcmd->mbox, 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_CLUSTER_RESET_LD;
+ dcmd->mbox[0] = MEGASAS_DEV_INDEX(instance, scmd);
+
+ megasas_issue_blocked_cmd(instance, cmd);
+
+ megasas_return_cmd(instance, cmd);
+ }
+
+ return ret;
+}
+
+/**
+ * megasas_reset_bus_host - Bus & host reset handler entry point
+ *
+ * Issues CLUSTER_RESET_ALL (FW direct cmd) before calling generic reset
fn.
+ */
+static int
+megasas_reset_bus_host(struct scsi_cmnd *scmd)
+{
+ int ret;
+ struct megasas_cmd *cmd;
+ struct megasas_dcmd_frame *dcmd;
+ struct megasas_instance *instance;
+
+ /*
+ * Frist wait for all commands to complete
+ */
+ ret = megasas_generic_reset(scmd);
+
+ if (ret == FAILED)
+ return ret;
+
+ /*
+ * Reset all reservations
+ */
+ instance = (struct megasas_instance*)scmd->device->host->hostdata;
+
+ cmd = megasas_get_cmd( instance );
+
+ if (cmd) {
+
+ dcmd = &cmd->frame->dcmd;
+
+ memset( dcmd->mbox, 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_CLUSTER_RESET_ALL;
+
+ megasas_issue_blocked_cmd(instance, cmd);
+
+ megasas_return_cmd(instance, cmd);
+ }
+
+ 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);
+}
+
+/**
+ * megasas_sysfs_show_app_hndl - Exports adapter handle via sysfs
+ *
+ * User space applications _don't_ address the controllers using zero based
+ * indices. Instead driver exports a unique 16-bit handle for each
controller
+ * (refer to comments under MR_LINUX_GET_ADAPTER_MAP ioctl).
+ *
+ * Applications use this handle to delete or add logical drives (via FW
+ * commands). To make these logical driver appear or disappear to SCSI
layer,
+ * applications have to do a delete or scan on a SCSI host in sysfs tree.
+ * The applications have to have a way to find out the SCSI host number
+ * corresponding to the unique 16-bit handle.
+ *
+ * This function exports the unique 16-bit handle in sysfs under the SCSI
+ * host. Applications can traverse the list of hosts till they find a host
+ * that has the required handle.
+ */
+static ssize_t
+megasas_sysfs_show_app_hndl(struct class_device *cdev, char *buf)
+{
+ int i;
+ u32 hndl = 0;
+ struct Scsi_Host *shost;
+ struct megasas_instance *instance;
+
+ shost = class_to_shost( cdev );
+ instance = (struct megasas_instance*)shost->hostdata;
+
+ for (i = 0; i < megasas_mgmt_info.max_index; i++ ) {
+
+ if (instance == megasas_mgmt_info.instance[i])
+ hndl = ((i + 1) << 4) | 0xF;
+ }
+
+ return snprintf(buf, 8, "%u\n", hndl);
+}
+
+/*
+ * Sysfs attribute definition: Exports driver specific controller handle
+ */
+CLASS_DEVICE_ATTR(megaraid_sas_app_hndl, S_IRUSR,
megasas_sysfs_show_app_hndl,
+
NULL);
+/*
+ * Host template initializer for sysfs attributes
+ */
+static struct class_device_attribute* megasas_shost_attrs[] = {
+ &class_device_attr_megaraid_sas_app_hndl,
+ NULL,
+};
+
+/*
+ * Scsi host template for megaraid_sas driver
+ */
+static struct scsi_host_template megasas_template = {
+
+ .module = THIS_MODULE,
+ .name = "LSI Logic SAS based MegaRAID
driver",
+ .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,
+ .shost_attrs = megasas_shost_attrs,
+};
+
+/**
+ * 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;
+ wake_up(&instance->abort_cmd_wait_q);
+ }
+
+ return;
+}
+
+/**
+ * megasas_unmap_sgbuf - Unmap SG buffers
+ * @instance: Adapter soft state
+ * @cmd: Completed command
+ */
+static inline 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 inline 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;
+
+ 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:
+ case MFI_STAT_LD_CC_IN_PROGRESS:
+ case MFI_STAT_LD_INIT_IN_PROGRESS:
+ case MFI_STAT_LD_RECON_IN_PROGRESS:
+ cmd->scmd->result = DID_OK << 16;
+ break;
+
+ case MFI_STAT_SCSI_IO_FAILED:
+ 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_DEVICE_NOT_FOUND:
+ cmd->scmd->result = DID_BAD_TARGET << 16;
+ break;
+
+ default:
+ printk(KERN_DEBUG "megasas: unhandled status %#x\n",
+ hdr->cmd_status);
+ cmd->scmd->result = DID_ERROR << 16;
+ }
+
+ 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:
+ 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 inline int
+megasas_deplete_reply_queue(struct megasas_instance *instance, u8
alt_status)
+{
+ u32 status;
+ u32 producer;
+ u32 consumer;
+ u32 context;
+ struct megasas_cmd *cmd;
+
+ /*
+ * Check if it is our interrupt
+ */
+ status = readl(&instance->reg_set->outbound_intr_status);
+
+ if (!(status & MFI_OB_INTR_STATUS_MASK)) {
+ return IRQ_NONE;
+ }
+
+ /*
+ * Clear the interrupt by writing back the same value
+ */
+ writel(status, &instance->reg_set->outbound_intr_status);
+
+ 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
+ * @reg_set: MFI register set
+ *
+ * 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_register_set *reg_set)
+{
+ int i;
+ u8 max_wait;
+ u32 fw_state;
+ u32 cur_state;
+
+ fw_state = readl(®_set->outbound_msg_0) & 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,
+ ®_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(reg_set);
+ writel(MFI_INIT_READY, ®_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 = MFI_STATE_MASK &
+ readl(®_set->outbound_msg_0);
+
+ 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;
+
+ 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;
+
+ 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, 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 *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 = (struct megasas_register_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;
+
+ /*
+ * We expect the FW state to be READY
+ */
+ if (megasas_transition_to_ready(instance->reg_set))
+ goto fail_ready_state;
+
+ /*
+ * Get various operational parameters from status register
+ */
+ instance->max_fw_cmds = readl(®_set->outbound_msg_0) & 0x00FFFF;
+ instance->max_num_sge =(readl(®_set->outbound_msg_0) & 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;
+
+ 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, 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;
+ u32 *mbox_word;
+ 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) {
+
+ mbox_word = (u32*)instance->aen_cmd->frame->dcmd.mbox;
+ prev_aen.word = mbox_word[1];
+
+ if (prev_aen.word == curr_aen.word) {
+ /*
+ * Required events have already been subscribed for
+ */
+ 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;
+ mbox_word = (u32*) dcmd->mbox;
+
+ memset(instance->evt_detail, 0, sizeof(struct megasas_evt_detail));
+
+ /*
+ * Prepare DCMD for aen registration
+ */
+ memset(dcmd->mbox, 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;
+ mbox_word[0] = seq_num;
+ mbox_word[1] = curr_aen.word;
+ dcmd->sgl.sge32[0].phys_addr = (u32)(instance->evt_detail_h &
+ 0xFFFF);
+ 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
+ */
+ writel(cmd->frame_phys_addr >> 3,
+ &instance->reg_set->inbound_queue_port);
+
+ 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
+ */
+ scsi_set_device( host, &instance->pdev->dev );
+
+ 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 = instance->max_fw_cmds - MEGASAS_INT_CMDS;
+ host->max_channel = MEGASAS_MAX_CHANNELS - 1;
+ host->max_id = MEGASAS_MAX_DEV_PER_CHANNEL;
+ host->max_lun = MEGASAS_MAX_LUN;
+
+ /*
+ * 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(KERN_INFO "megasas: 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->aen_lock);
+ spin_lock_init(&instance->cmd_pool_lock);
+ spin_lock_init(&instance->instance_lock);
+
+ /*
+ * 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;
+ }
+
+ megasas_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)
+ */
+ megasas_start_aen(instance);
+
+ /*
+ * Register with SCSI mid-layer
+ */
+ if (megasas_io_attach(instance))
+ goto fail_io_attach;
+
+ return 0;
+
+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, 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[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, 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 device *device)
+{
+ struct megasas_instance *instance = (struct megasas_instance*)
+ dev_get_drvdata(device);
+ 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)
+{
+ 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;
+
+ down( &megasas_async_queue_mutex );
+
+ rc = fasync_helper(fd, filep, mode, &megasas_async_queue);
+
+ up(&megasas_async_queue_mutex);
+
+ if (rc >0)
+ return 0;
+
+ printk(KERN_DEBUG "megasas: fasync_helper failed [%d]\n", rc);
+
+ return rc;
+}
+
+/**
+ * megasas_mgmt_fw_dcmd - Issues DCMD to the FW
+ * @instance: Adapter soft state
+ * @uioc: User's ioctl packet copied into kernel addr
+ * @argp: User's ioctl packet in user address
+ * @cmd: Command to be prepared and issued
+ *
+ * This function prepares direct command (DCMD) to FW from user's ioctl
packet.
+ * The driver allocates temporary buffer (if needed) for data transfer
+ *
+ * Note: The suffixes 'k' & 'u' mean 'kerne' and 'user' respectively
+ */
+static int
+megasas_mgmt_fw_dcmd(struct megasas_instance *instance, struct iocpacket
*uioc,
+ void __user *argp, struct megasas_cmd *cmd)
+{
+ int rc = 0;
+ void __user *ubuff;
+ struct megasas_dcmd_frame *kdcmd;
+ struct megasas_dcmd_frame __user *udcmd;
+ struct megasas_dcmd_frame *cmd_dcmd;
+ caddr_t kbuff;
+ dma_addr_t kbuff_h;
+ u32 xferlen;
+ u8 user_64bit_sgl = 0;
+
+ cmd_dcmd = &cmd->frame->dcmd;
+ kdcmd = (struct megasas_dcmd_frame*) &uioc->frame;
+ udcmd = (struct megasas_dcmd_frame*)
+ (((struct iocpacket*)argp)->frame);
+
+ if (kdcmd->flags & MFI_FRAME_SGL64 )
+ user_64bit_sgl = 1;
+
+ if (!user_64bit_sgl) {
+ xferlen = kdcmd->sgl.sge32[0].length;
+ ubuff = (void __user*) (ulong)
udcmd->sgl.sge32[0].phys_addr;
+ }
+ else {
+ xferlen = kdcmd->sgl.sge64[0].length;
+ ubuff = (void __user*) (ulong)
udcmd->sgl.sge64[0].phys_addr;
+ }
+
+ /*
+ * Allocate internal buffer for data transfer
+ */
+ if (xferlen)
+ kbuff = pci_alloc_consistent(instance->pdev, xferlen,
&kbuff_h);
+ else
+ kbuff = NULL;
+
+ if (xferlen && !kbuff) {
+ printk(KERN_DEBUG "megasas: Failed to allocate memory for "
+ "DCMD internal buffer \n");
+ return -ENOMEM;
+ }
+
+ if (xferlen && (kdcmd->flags & MFI_FRAME_DIR_WRITE)) {
+
+ if (copy_from_user(kbuff, ubuff, xferlen)) {
+ printk( KERN_DEBUG "megasas: Failed to copy from "
+ "application
buffer\n");
+ rc = -EFAULT;
+ goto exit_label;
+ }
+ }
+
+ /*
+ * Copy the frame sent by user into driver's frame
+ */
+ cmd_dcmd->cmd = kdcmd->cmd;
+ cmd_dcmd->cmd_status = kdcmd->cmd_status;
+ cmd_dcmd->sge_count = kdcmd->sge_count;
+ cmd_dcmd->timeout = kdcmd->timeout;
+ cmd_dcmd->data_xfer_len = kdcmd->data_xfer_len;
+ cmd_dcmd->opcode = kdcmd->opcode;
+
+ memcpy( cmd_dcmd->mbox, kdcmd->mbox, MFI_MBOX_SIZE );
+
+ if (!user_64bit_sgl) {
+ cmd_dcmd->flags = kdcmd->flags;
+ cmd_dcmd->sgl.sge32[0].length =
kdcmd->sgl.sge32[0].length;
+ cmd_dcmd->sgl.sge32[0].phys_addr= kbuff_h;
+ }
+ else {
+ cmd_dcmd->flags = kdcmd->flags
|MFI_FRAME_SGL64;
+ cmd_dcmd->sgl.sge64[0].length =
kdcmd->sgl.sge64[0].length;
+ cmd_dcmd->sgl.sge64[0].phys_addr= kbuff_h;
+ }
+
+ megasas_issue_blocked_cmd(instance, cmd);
+
+ if (copy_to_user(ubuff, kbuff, xferlen)) {
+
+ printk( KERN_DEBUG "megasas: Failed to copy "
+ "to application buffer\n");
+ rc = -EFAULT;
+ goto exit_label;
+ }
+
+ if (copy_to_user(&udcmd->cmd_status, &cmd_dcmd->cmd_status,
+ sizeof(u8))) {
+ printk(KERN_DEBUG "megasas: Failed to copy to "
+ "application buffer\n");
+ rc = -EFAULT;
+ goto exit_label;
+ }
+
+exit_label:
+ pci_free_consistent(instance->pdev, xferlen, kbuff, kbuff_h);
+ return rc;
+}
+
+/**
+ * megasas_mgmt_fw_dcdb - Prepares and issues DCDB
+ * @instance: Adapter soft state
+ * @uioc: User's ioctl packet copied into kernel addr
+ * @argp: User's ioctl packet in user addr
+ * @cmd: Free command from the command pool
+ *
+ * Note that the suffixes 'k' and 'u' mean 'kernel' and 'user'
respectively.
+ */
+static int
+megasas_mgmt_fw_dcdb(struct megasas_instance *instance, struct iocpacket
*uioc,
+ void __user *argp, struct megasas_cmd *cmd)
+{
+ int rc = 0;
+ void __user *ubuff;
+ void __user *usense;
+ struct megasas_pthru_frame *kdcdb;
+ struct megasas_pthru_frame __user *udcdb;
+ struct megasas_pthru_frame *cmd_dcdb;
+ caddr_t kbuff;
+ dma_addr_t kbuff_h;
+ caddr_t ksense;
+ dma_addr_t ksense_h;
+ u32 xferlen;
+ u8 user_64bit_sgl = 0;
+ u64 temp;
+
+ ksense = NULL;
+ usense = NULL;
+ cmd_dcdb = &cmd->frame->pthru;
+ kdcdb = (struct megasas_pthru_frame*) &uioc->frame;
+ udcdb = (struct megasas_pthru_frame*)
+ (((struct iocpacket*)argp)->frame);
+
+ if (kdcdb->flags & MFI_FRAME_SGL64 )
+ user_64bit_sgl = 1;
+
+ if (!user_64bit_sgl) {
+ xferlen = kdcdb->sgl.sge32[0].length;
+ ubuff = (void __user*)(ulong)
(udcdb->sgl.sge32[0].phys_addr);
+ }
+ else {
+ xferlen = kdcdb->sgl.sge64[0].length;
+ ubuff = (void __user*) (ulong)
udcdb->sgl.sge64[0].phys_addr;
+ }
+
+ /*
+ * Allocate internal buffer for data transfer
+ */
+ if (xferlen)
+ kbuff = pci_alloc_consistent(instance->pdev, xferlen,
&kbuff_h);
+ else
+ kbuff = NULL;
+
+ if (xferlen && !kbuff) {
+ printk(KERN_DEBUG "megasas: Failed to allocate memory "
+ "for DCDB internal
buffer\n");
+ return -ENOMEM;
+ }
+
+ memset(kbuff, 0, xferlen);
+
+ /*
+ * Allocate internal buffer for request sense
+ */
+ if (kdcdb->sense_len) {
+ ksense = pci_alloc_consistent(instance->pdev,
kdcdb->sense_len,
+ &ksense_h);
+ if (!ksense) {
+ rc = -ENOMEM;
+ goto exit_label;
+ }
+
+ temp = kdcdb->sense_buf_phys_addr_hi;
+ temp = temp << 32 | kdcdb->sense_buf_phys_addr_lo;
+
+ usense = (void __user*)(ulong) temp;
+
+ }
+
+ if (xferlen && (kdcdb->flags & MFI_FRAME_DIR_WRITE)) {
+
+ if (copy_from_user(kbuff, ubuff, xferlen)) {
+ printk(KERN_DEBUG "megasas: Failed to copy from "
+ "application buffer \n");
+ rc = -EFAULT;
+ goto exit_label;
+ }
+ }
+
+ memcpy(cmd_dcdb, kdcdb, MEGAMFI_FRAME_SIZE);
+ cmd_dcdb->context = cmd->index;
+ cmd_dcdb->sge_count = 1;
+
+ if (!user_64bit_sgl) {
+ cmd_dcdb->flags = kdcdb->flags;
+ cmd_dcdb->sgl.sge32[0].length =
kdcdb->sgl.sge32[0].length;
+ cmd_dcdb->sgl.sge32[0].phys_addr= kbuff_h;
+ }
+ else {
+ cmd_dcdb->flags = kdcdb->flags
|MFI_FRAME_SGL64;
+ cmd_dcdb->sgl.sge64[0].length =
kdcdb->sgl.sge64[0].length;
+ cmd_dcdb->sgl.sge64[0].phys_addr= kbuff_h;
+ }
+
+ cmd_dcdb->sense_buf_phys_addr_hi = 0;
+ cmd_dcdb->sense_buf_phys_addr_lo = ksense_h ;
+
+ cmd->sync_cmd = 1;
+
+ megasas_issue_blocked_cmd(instance, cmd);
+
+ if (xferlen && (kdcdb->flags & MFI_FRAME_DIR_READ)) {
+
+ if (copy_to_user( ubuff, kbuff, xferlen)) {
+
+ printk(KERN_DEBUG "megasas: Failed to copy "
+ "to application buffer \n");
+ rc = -EFAULT;
+ goto exit_label;
+ }
+ }
+
+ if (copy_to_user(&udcdb->cmd_status, &cmd_dcdb->cmd_status,
+ sizeof(u8))) {
+ printk(KERN_DEBUG "megasas: Failed to copy to "
+ "application buffer\n" );
+ rc = -EFAULT;
+ goto exit_label;
+ }
+
+ if (kdcdb->sense_len) {
+ if (copy_to_user(usense, ksense, kdcdb->sense_len)) {
+ printk(KERN_DEBUG "megasas: Failed to copy "
+ "to application buffer \n");
+ rc = -EFAULT;
+ goto exit_label;
+ }
+ }
+
+exit_label:
+ if (ksense)
+ pci_free_consistent(instance->pdev, kdcdb->sense_len,
ksense,
+ ksense_h);
+ if (kbuff)
+ pci_free_consistent(instance->pdev, xferlen, kbuff,
kbuff_h);
+
+ return rc;
+}
+
+/**
+ * megasas_mgmt_fw_smp - Issues passthrough cmds to SAS devices
+ * @instance: Adapter soft state
+ * @uioc: User's ioctl packet in kernel address
+ * @argp: User's ioctl packet in user address
+ * @cmd: Command from free pool
+ *
+ * SMP frames have two SG elements at the end - response and request ( in
that
+ * order). This function allocates temporary DMA buffers for these SG
elements.
+ *
+ * Note that the suffixes 'k' and 'u' mean 'kernel' and 'user'
respectively.
+ */
+static int
+megasas_mgmt_fw_smp(struct megasas_instance *instance, struct iocpacket
*uioc,
+ void __user *argp, struct megasas_cmd *cmd)
+{
+ int rc = 0;
+ struct megasas_smp_frame *ksmp;
+ struct megasas_smp_frame __user *usmp;
+ struct megasas_smp_frame *cmd_smp;
+
+ caddr_t kreq;
+ caddr_t kresp;
+ dma_addr_t kreq_h;
+ dma_addr_t kresp_h;
+ void __user *ureq;
+ void __user *uresp;
+ u32 req_len;
+ u32 resp_len;
+
+ u8 user_64bit_sgl = 0;
+
+ cmd_smp = &cmd->frame->smp;
+ ksmp = (struct megasas_smp_frame*) &uioc->frame;
+ usmp = (struct megasas_smp_frame*)
+ (((struct iocpacket*)argp)->frame);
+
+ if (ksmp->flags & MFI_FRAME_SGL64 )
+ user_64bit_sgl = 1;
+
+ if (!user_64bit_sgl) {
+ resp_len = ksmp->sgl.sge32[0].length;
+ req_len = ksmp->sgl.sge32[1].length;
+
+ uresp = (void __user*) ((ulong)
usmp->sgl.sge32[0].phys_addr);
+ ureq = (void __user*) ((ulong)
usmp->sgl.sge32[1].phys_addr);
+ }
+ else {
+ resp_len = ksmp->sgl.sge64[0].length;
+ req_len = ksmp->sgl.sge64[1].length;
+
+ uresp = (void __user*) ((ulong)
usmp->sgl.sge64[0].phys_addr);
+ ureq = (void __user*) ((ulong)
usmp->sgl.sge64[1].phys_addr);
+ }
+
+ if (!req_len || !resp_len) {
+ return -EINVAL;
+ }
+
+ /*
+ * Allocate kernel buffers for SMP request and response
+ */
+ kreq = NULL;
+ kresp = NULL;
+
+ kreq = pci_alloc_consistent(instance->pdev, req_len, &kreq_h);
+
+ if (!kreq) {
+
+ printk(KERN_DEBUG "megasas: Failed to allocate memory "
+ "for SMP request
\n");
+ rc = -ENOMEM;
+ goto exit_label;
+ }
+
+ kresp = pci_alloc_consistent(instance->pdev, resp_len, &kresp_h);
+
+ if(!kresp) {
+ printk(KERN_DEBUG "megasas: Failed to allocate memory "
+ "for SMP response
\n");
+ rc = -ENOMEM;
+ goto exit_label;
+ }
+
+ if (copy_from_user(kreq, ureq, req_len)) {
+ printk(KERN_DEBUG "megasas: Failed to copy from "
+ "application buffer \n");
+ rc = -EFAULT;
+ goto exit_label;
+ }
+
+ memcpy (cmd_smp, ksmp, MEGAMFI_FRAME_SIZE);
+ cmd_smp->context = cmd->index;
+
+ if (!user_64bit_sgl) {
+ cmd_smp->flags = ksmp->flags;
+ cmd_smp->sgl.sge32[0].length = resp_len;
+ cmd_smp->sgl.sge32[0].phys_addr = kresp_h;
+ cmd_smp->sgl.sge32[1].length = req_len;
+ cmd_smp->sgl.sge32[1].phys_addr = kreq_h;
+ }
+ else {
+ cmd_smp->flags = ksmp->flags |
+ MFI_FRAME_SGL64;
+ cmd_smp->sgl.sge64[0].length = resp_len;
+ cmd_smp->sgl.sge64[0].phys_addr = kresp_h;
+ cmd_smp->sgl.sge64[1].length = req_len;
+ cmd_smp->sgl.sge64[1].phys_addr = kreq_h;
+ }
+
+ megasas_issue_blocked_cmd(instance, cmd);
+
+ if (copy_to_user(uresp, kresp, resp_len)) {
+ printk(KERN_DEBUG "megasas: Failed to copy to "
+ "application buffer \n");
+ rc = -EFAULT;
+ goto exit_label;
+ }
+
+ if (copy_to_user(&usmp->cmd_status, &cmd_smp->cmd_status,
+ sizeof(u8))) {
+ printk(KERN_DEBUG "megasas: Failed to copy to "
+ "application buffer \n");
+ rc = -EFAULT;
+ goto exit_label;
+ }
+
+exit_label:
+
+ if (kreq)
+ pci_free_consistent(instance->pdev, req_len, kreq, kreq_h);
+ if (kresp)
+ pci_free_consistent(instance->pdev, resp_len, kresp,
kresp_h);
+
+ return rc;
+}
+
+/**
+ * megasas_mgmt_fw_stp - Issues passthrough cmds to SATA drives
+ * @instance: Adapter soft state
+ * @uioc: User ioctl packet in kernel address
+ * @argp: User ioctl packet in user address
+ * @cmd: Command from free pool
+ *
+ * Note that the suffixes 'k' and 'u' mean 'kernel' and 'user'
respectively.
+ */
+static int
+megasas_mgmt_fw_stp(struct megasas_instance *instance, struct iocpacket
*uioc,
+ void __user *argp, struct megasas_cmd *cmd)
+{
+ int rc = 0;
+ struct megasas_stp_frame *kstp;
+ struct megasas_stp_frame __user *ustp;
+ struct megasas_stp_frame *cmd_stp;
+
+ caddr_t kdata;
+ caddr_t kresp;
+ dma_addr_t kdata_h;
+ dma_addr_t kresp_h;
+ void __user *udata;
+ void __user *uresp;
+ u32 data_len;
+ u32 resp_len;
+
+ u8 user_64bit_sgl = 0;
+
+ cmd_stp = &cmd->frame->stp;
+ kstp = (struct megasas_stp_frame *) &uioc->frame;
+ ustp = (struct megasas_stp_frame *)
+ (((struct iocpacket *)argp)->frame);
+
+ if (kstp->flags & MFI_FRAME_SGL64 )
+ user_64bit_sgl = 1;
+
+ if (!user_64bit_sgl) {
+
+ resp_len = ustp->sgl.sge32[0].length;
+ data_len = ustp->sgl.sge32[1].length;
+
+ uresp = (void __user*) ((ulong)
ustp->sgl.sge32[0].phys_addr);
+ udata = (void __user*) ((ulong)
ustp->sgl.sge32[1].phys_addr);
+ }
+ else {
+ resp_len = ustp->sgl.sge64[0].length;
+ data_len = ustp->sgl.sge64[1].length;
+
+ uresp = (void __user*) ((ulong)
ustp->sgl.sge64[0].phys_addr);
+ udata = (void __user*) ((ulong)
ustp->sgl.sge64[1].phys_addr);
+ }
+
+ if (!data_len || !resp_len) {
+ return -EINVAL;
+ }
+
+ /*
+ * Allocate kernel buffers for SMP request and response
+ */
+
+ kdata = NULL;
+ kresp = NULL;
+
+ kdata = pci_alloc_consistent(instance->pdev, data_len, &kdata_h);
+
+ if(!kdata) {
+
+ printk(KERN_DEBUG "megasas: Failed to allocate memory "
+ "for STP request
\n");
+ rc = -ENOMEM;
+ goto exit_label;
+ }
+
+ kresp = pci_alloc_consistent(instance->pdev, resp_len, &kresp_h);
+
+ if(!kresp) {
+ printk(KERN_DEBUG "megasas: Failed to allocate memory "
+ "for STP response
\n");
+ rc = -ENOMEM;
+ goto exit_label;
+ }
+
+ memcpy (cmd_stp, kstp, MEGAMFI_FRAME_SIZE);
+ cmd_stp->context = cmd->index;
+
+ if (!user_64bit_sgl) {
+ cmd_stp->flags = kstp->flags;
+ cmd_stp->sgl.sge32[0].length = resp_len;
+ cmd_stp->sgl.sge32[0].phys_addr = kresp_h;
+ cmd_stp->sgl.sge32[1].length = data_len;
+ cmd_stp->sgl.sge32[1].phys_addr = kdata_h;
+ }
+ else {
+ cmd_stp->flags = kstp->flags |
+ MFI_FRAME_SGL64;
+ cmd_stp->sgl.sge64[0].length = resp_len;
+ cmd_stp->sgl.sge64[0].phys_addr = kresp_h;
+ cmd_stp->sgl.sge64[1].length = data_len;
+ cmd_stp->sgl.sge64[1].phys_addr = kdata_h;
+ }
+
+ megasas_issue_blocked_cmd(instance, cmd);
+
+ if (copy_to_user(uresp, kresp, resp_len)) {
+ printk( KERN_DEBUG "megasas: Failed to copy to "
+ "application buffer \n" );
+ rc = -EFAULT;
+ goto exit_label;
+ }
+
+ if (copy_to_user(udata, kdata, data_len)) {
+ printk( KERN_DEBUG "megasas: Failed to copy to "
+ "application buffer \n" );
+ rc = -EFAULT;
+ goto exit_label;
+ }
+
+ if (copy_to_user(&ustp->cmd_status, &cmd_stp->cmd_status,
+ sizeof(u8))) {
+ printk( KERN_DEBUG "megasas: Failed to copy to "
+ "application buffer \n" );
+ rc = -EFAULT;
+ goto exit_label;
+ }
+
+exit_label:
+
+ if (kdata)
+ pci_free_consistent(instance->pdev, data_len, kdata,
kdata_h);
+ if (kresp)
+ pci_free_consistent(instance->pdev, resp_len, kresp,
kresp_h);
+
+ 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, void __user *argp)
+{
+ int ret;
+ struct iocpacket *uioc;
+ struct megasas_header *hdr;
+ struct megasas_cmd *cmd;
+
+ uioc = kmalloc(sizeof(struct iocpacket), GFP_KERNEL);
+
+ if (!uioc) {
+ printk(KERN_DEBUG "megasas: Failed to allocate memory "
+ "for application IOCTL packet\n");
+ return -ENOMEM;
+ }
+
+ if (copy_from_user(uioc, argp, sizeof(struct iocpacket))) {
+ printk( KERN_DEBUG "megasas: Failed to copy from "
+ "application buffer \n" );
+ return -EFAULT;
+ }
+
+ cmd = megasas_get_cmd(instance);
+
+ if (!cmd) {
+ printk(KERN_DEBUG "megasas: Failed to get a cmd packet\n");
+ return -ENOMEM;
+ }
+
+ hdr = (struct megasas_header*) uioc->frame;
+
+ switch( hdr->cmd ) {
+
+ case MFI_CMD_DCMD:
+ ret = megasas_mgmt_fw_dcmd(instance, uioc, argp,
cmd);
+ break;
+
+ case MFI_CMD_PD_SCSI_IO:
+ case MFI_CMD_LD_SCSI_IO:
+ ret = megasas_mgmt_fw_dcdb(instance, uioc, argp,
cmd);
+ break;
+
+ case MFI_CMD_SMP:
+ ret = megasas_mgmt_fw_smp(instance, uioc, argp,
cmd);
+ break;
+
+ case MFI_CMD_STP:
+ ret = megasas_mgmt_fw_stp(instance, uioc, argp,
cmd);
+ break;
+
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ megasas_return_cmd( instance, cmd );
+ return ret;
+}
+
+/**
+ * megasas_fill_drv_ver - Fills the driver version info for
application
+ * @dv: Driver version information
+ */
+static void
+megasas_fill_drv_ver(struct megasas_drv_ver *dv)
+{
+ memset( dv, 0, sizeof(*dv) );
+
+ memcpy(dv->signature, "$LSI LOGIC$", strlen("$LSI LOGIC$") );
+ memcpy(dv->os_name, "Linux", strlen("Linux") );
+ memcpy(dv->os_ver, "Ver Indpndt", strlen("ver indpndt") );
+ memcpy(dv->drv_name, "megaraid_sas", strlen("megaraid_sas") );
+ memcpy(dv->drv_ver, MEGASAS_VERSION,strlen(MEGASAS_VERSION) );
+ memcpy(dv->drv_rel_date,MEGASAS_RELDATE,strlen(MEGASAS_RELDATE) );
+}
+
+/**
+ * megasas_mgmt_ioctl - char node ioctl entry point
+ *
+ * Few ioctl commands should be handled by driver itself (driver ioctls)
and
+ * the rest should be converted into appropriate commands for FW and
issued.
+ */
+static int
+megasas_mgmt_ioctl(struct inode *inode, struct file* filep,
+ unsigned int cmd, unsigned long arg )
+{
+ int i;
+ int j;
+ int rc;
+ u8 fw_status;
+ struct iocpacket *uioc;
+ void __user *argp;
+ void __user *udata_addr;
+ u8 user_64bit_sgl = 0;
+ u32 opcode;
+
+ u32 seq_num;
+ u32 class_locale_word;
+ u32 *mbox_word;
+
+ struct megasas_instance *instance;
+ struct megasas_dcmd_frame *kdcmd;
+ struct megasas_dcmd_frame __user *udcmd;
+ struct megasas_drv_ver *dv;
+ struct pci_dev *pdev;
+
+ argp = (void __user*) arg;
+ uioc = kmalloc(sizeof(struct iocpacket), GFP_KERNEL);
+
+ if (!uioc) {
+ printk(KERN_DEBUG "megasas: Failed to allocate memory "
+ "for application IOCTL packet\n");
+ return -ENOMEM;
+ }
+
+ if (copy_from_user(uioc, argp, sizeof(struct iocpacket))) {
+ printk( KERN_DEBUG "megasas: Failed to copy from "
+ "application buffer \n" );
+ return -EINVAL;
+ }
+
+ if (strncmp(uioc->signature, IOC_SIGNATURE, strlen(IOC_SIGNATURE))
!=0){
+ printk( KERN_DEBUG "megasas: Invalid ioctl signature\n" );
+ return -EINVAL;
+ }
+
+ if (uioc->version != 0) {
+ printk( KERN_DEBUG "megasas: Invalid ioctl version %d\n",
+
uioc->version );
+ return -EINVAL;
+ }
+
+ instance = NULL;
+ kdcmd = (struct megasas_dcmd_frame*) uioc->frame;
+ udcmd = (struct megasas_dcmd_frame*)
+ (((struct iocpacket*)argp)->frame);
+
+ /*
+ * Find out if user has used 32 or 64 bit SGL
+ */
+ if (kdcmd->flags & MFI_FRAME_SGL64 )
+ user_64bit_sgl = 1;
+
+ if (!user_64bit_sgl)
+ udata_addr = (void __user*)
+
((ulong)kdcmd->sgl.sge32[0].phys_addr);
+ else
+ udata_addr = (void __user*)
+ ((ulong)
kdcmd->sgl.sge64[0].phys_addr);
+
+ i = ((uioc->controller_id & 0xF0) >> 4) - 1;
+
+ if (i < megasas_mgmt_info.max_index)
+ instance = megasas_mgmt_info.instance[i];
+ else
+ instance = NULL;
+
+ if ((uioc->control_code == MR_DRIVER_IOCTL_LINUX) ||
+ (uioc->control_code == MR_DRIVER_IOCTL_COMMON)) {
+ /*
+ * If MR_DRIVER_IOCTL_LINUX or MR_DRIVER_IOCTL_COMMON
+ * look at dcmd->opcode for the actual operation
+ */
+ opcode = kdcmd->opcode;
+ }
+ else {
+ /* FW Command */
+ opcode = uioc->control_code;
+ }
+
+ switch (opcode) {
+
+ case MR_DRIVER_IOCTL_DRIVER_VERSION:
+
+ dv = kmalloc(sizeof(struct megasas_drv_ver), GFP_KERNEL);
+
+ if (!dv) {
+ printk(KERN_DEBUG "megasas: Failed to allocate "
+ "memory for driver
version\n");
+ return -ENOMEM;
+ }
+
+ megasas_fill_drv_ver(dv);
+
+ if (copy_to_user(udata_addr, dv,
+ sizeof(struct megasas_drv_ver))) {
+ printk( KERN_DEBUG "megasas: Failed to copy to "
+ "application buffer \n" );
+ return -EFAULT;
+ }
+
+ rc = 0;
+ fw_status = MFI_STAT_OK;
+
+ if (copy_to_user( &udcmd->cmd_status, &fw_status,
+ sizeof(u8))) {
+ rc = -EFAULT;
+ printk( KERN_DEBUG "megasas: Failed to copy to "
+ "application buffer \n" );
+ }
+
+ break;
+
+ case MR_LINUX_GET_ADAPTER_COUNT:
+
+ if (copy_to_user(udata_addr, &megasas_mgmt_info.count,
+ sizeof(u16))) {
+ return -EFAULT;
+ printk( KERN_DEBUG "megasas: Failed to copy to "
+ "application buffer \n" );
+ }
+
+ rc = 0;
+ fw_status = MFI_STAT_OK;
+
+ if (copy_to_user(&udcmd->cmd_status, &fw_status,
+ sizeof(u8))) {
+ rc = -EFAULT;
+ printk( KERN_DEBUG "megasas: Failed to copy to "
+ "application buffer \n" );
+ }
+
+ break;
+
+ case MR_LINUX_GET_ADAPTER_MAP:
+ /*
+ * The applications _don't_ address our controllers using
zero
+ * based index. We give them an array of 16-bit unique
handles.
+ * These unique handles are simple encryptions of the
indices
+ *
+ * Encrypting logic - which converts a controller index into
a
+ * 16-bit value - is simply (index + 1) << 4 | 0x0F.
+ *
+ * Note also when controllers are hot plugged, our
controller
+ * array (megasas_mgmt_info) becomes sparse. We don't reuse
the
+ * vacated slots.
+ */
+ memset(megasas_mgmt_info.map, 0,
+ sizeof(u16) * MAX_MGMT_ADAPTERS);
+
+ j = 0;
+ for (i = 0; i < megasas_mgmt_info.max_index; i++) {
+ if (megasas_mgmt_info.instance[i]) {
+ megasas_mgmt_info.map[j].unique_hndl =
+ ((i + 1) << 4) | 0xF;
+
+ pdev = megasas_mgmt_info.instance[i]->pdev;
+
+ megasas_mgmt_info.map[j].bus_devfn =
+ ((pdev->bus->number) << 16 |
+ (PCI_SLOT(pdev->devfn)) << 8 |
+ (PCI_FUNC(pdev->devfn))) & 0xFFFFFF;
+
+ j++;
+ }
+ }
+
+ if ((j) && (copy_to_user(udata_addr, megasas_mgmt_info.map,
+ sizeof(struct megasas_adp_map) * j))) {
+
+ printk(KERN_DEBUG "megasas: Failed to copy to "
+ "application buffer \n" );
+ return -EFAULT;
+ }
+
+ fw_status = MFI_STAT_OK;
+ rc = 0;
+
+ if (copy_to_user( &udcmd->cmd_status, &fw_status,
+ sizeof(u8))) {
+ rc = -EFAULT;
+ printk(KERN_DEBUG "megasas: Failed to copy to "
+ "application buffer \n" );
+ }
+
+ break;
+
+ case MR_LINUX_GET_AEN:
+
+ if (!instance) {
+ printk( KERN_DEBUG "megasas: Invalid instance \n" );
+ return -ENODEV;
+ }
+
+
+ spin_lock(&instance->aen_lock);
+
+ mbox_word = (u32*) kdcmd->mbox;
+ seq_num = mbox_word[0];
+ class_locale_word = mbox_word[1];
+
+ rc = megasas_register_aen(instance, seq_num,
class_locale_word);
+
+ spin_unlock(&instance->aen_lock);
+
+ break;
+
+ case IOC_CMD_FIRMWARE:
+
+ if (!instance) {
+ printk(KERN_DEBUG "megasas: Invalid instance \n");
+ return -ENODEV;
+ }
+
+ rc = megasas_mgmt_fw_ioctl(instance, argp);
+
+ break;
+
+ default:
+ return -ENOTTY;
+ }
+
+ return rc;
+}
+
+#ifdef CONFIG_COMPAT
+/**
+ * megasas_compat_ioctl - Handles conversions from 32-bit apps
+ */
+static int
+megasas_compat_ioctl(struct file *filep, unsigned int cmd, unsigned long
arg)
+{
+ return megasas_mgmt_ioctl(NULL, filep, cmd, arg);
+}
+#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,
+ .ioctl = megasas_mgmt_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = megasas_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),
+ .driver = {
+ .shutdown = megasas_shutdown,
+ }
+};
+
+/**
+ * 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);
+
+ /*
+ * 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");
+ }
+
+ return rval;
+}
+
+/**
+ * megasas_exit - Driver unload entry point
+ */
+static void __exit
+megasas_exit(void)
+{
+ pci_unregister_driver(&megasas_pci_driver);
+ unregister_chrdev(megasas_mgmt_majorno, "megaraid_sas_ioctl");
+
+ return;
+}
+
+module_init(megasas_init);
+module_exit(megasas_exit);
+
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