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Subject[PATCH 2.6.12-rc4-mm1 3/4] megaraid_sas: updating the driver
Date
Patch 3 of 4:

Signed-off by: Sreenivas Bagalkote <sreenivas.bagalkote@lsil.com>

diff -Naurp linux-2.6.12-rc4-mm1.c/drivers/scsi/megaraid/megaraid_sas.c
linux-2.6.12-rc4-mm1.d/drivers/scsi/megaraid/megaraid_sas.c
--- linux-2.6.12-rc4-mm1.c/drivers/scsi/megaraid/megaraid_sas.c 1969-12-31
19:00:00.000000000 -0500
+++ linux-2.6.12-rc4-mm1.d/drivers/scsi/megaraid/megaraid_sas.c 2005-05-15
22:04:04.579228792 -0400
@@ -0,0 +1,3398 @@
+/*
+ *
+ * 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 : v00.00.01.02
+ *
+ * Authors:
+ * Sreenivas Bagalkote <Sreenivas.Bagalkote@lsil.com>
+ *
+ * List of supported controllers
+ *
+ * OEM Product Name VID DID SSVID SSID
+ * --- ------------ --- --- ---- ----
+ */
+
+#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_g[] = {
+
+ {
+ PCI_VENDOR_ID_LSI_LOGIC,
+ PCI_DEVICE_LSI_1064,
+ PCI_ANY_ID,
+ PCI_ANY_ID,
+ },
+ {
+ PCI_VENDOR_ID_DELL,
+ PCI_DEVICE_ID_DELL_PERC5,
+ PCI_VENDOR_ID_DELL,
+ PCI_SUBSYSTEM_DELL_PERC5E,
+ },
+ {
+ PCI_VENDOR_ID_DELL,
+ PCI_DEVICE_ID_DELL_PERC5,
+ PCI_VENDOR_ID_DELL,
+ PCI_SUBSYSTEM_DELL_PERC5I,
+ },
+ {
+ PCI_VENDOR_ID_DELL,
+ PCI_DEVICE_ID_DELL_PERC5,
+ PCI_VENDOR_ID_DELL,
+ PCI_SUBSYSTEM_DELL_PERC5I_INTEGRATED,
+ },
+ {
+ PCI_VENDOR_ID_LSI_LOGIC,
+ PCI_DEVICE_ID_DELL_SAS5,
+ PCI_VENDOR_ID_DELL,
+ PCI_SUBSYSTEM_DELL_SAS5I,
+ },
+ {
+ PCI_VENDOR_ID_LSI_LOGIC,
+ PCI_DEVICE_ID_DELL_SAS5,
+ PCI_VENDOR_ID_DELL,
+ PCI_SUBSYSTEM_DELL_SAS5I_INTEGRATED,
+ },
+ { 0 } /* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE(pci, megasas_pci_table_g);
+
+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;
+
+ spin_lock_irqsave(&instance->cmd_pool_lock, flags);
+
+ if ( list_empty(&instance->cmd_pool)) {
+ spin_unlock_irqrestore(&instance->cmd_pool_lock, flags);
+ return NULL;
+ }
+
+ 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_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 = (struct
megasas_header*)cmd->frame;
+
+ frame_hdr->cmd_status = 0xFF;
+ frame_hdr->flags |= MFI_FRAME_DONT_POST_IN_REPLY_QUEUE;
+
+ /*
+ * Issue the frame using inbound queue port
+ */
+ WR_IN_QPORT( (cmd->frame_phys_addr >> 3), 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 )
+{
+ u32 msg_frame;
+
+ cmd->cmd_status = ENODATA;
+ msg_frame = (cmd->frame_phys_addr >> 3);
+
+ WR_IN_QPORT( msg_frame, 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;
+
+ WR_IN_QPORT( (cmd->frame_phys_addr >> 3), instance->reg_set );
+
+ /*
+ * 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;
+ struct page* page;
+ unsigned long offset;
+
+ /*
+ * Return 0 if there is no data transfer
+ */
+ if (!scp->request_buffer || !scp->request_bufflen)
+ return 0;
+
+ if (!scp->use_sg) {
+ page = virt_to_page( scp->request_buffer );
+ offset = ((unsigned long)scp->request_buffer & ~PAGE_MASK);
+
+ mfi_sgl->sge32[0].phys_addr =
pci_map_page(instance->pdev,
+ page, offset,
+
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;
+ struct page* page;
+ unsigned long offset;
+
+ /*
+ * Return 0 if there is no data transfer
+ */
+ if (!scp->request_buffer || !scp->request_bufflen)
+ return 0;
+
+ if (!scp->use_sg) {
+ page = virt_to_page( scp->request_buffer );
+ offset = ((unsigned long)scp->request_buffer & ~PAGE_MASK);
+
+ mfi_sgl->sge64[0].phys_addr =
pci_map_page(instance->pdev,
+ page, offset,
+
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 = SCP2LUN(scp);
+ 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;
+
+ /*
+ * TBD: Comment the code below
+ */
+ 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 (SCP2TARGET(scp) >= 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 (SCP2LUN(scp)) {
+ 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 (SCP2LUN(scp)) {
+ 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;
+ struct megasas_cmd* cmd;
+ struct megasas_instance* instance;
+ u32 msg_frame;
+
+ instance = SCP2ADAPTER(scmd);
+ 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
+ */
+ msg_frame = (cmd->frame_phys_addr >> 3) | (cmd->frame_count - 1);
+
+ instance->fw_outstanding++;
+ WR_IN_QPORT( msg_frame, instance->reg_set );
+
+ return 0;
+}
+
+/**
+ * megasas_abort_handler - Abort entry point
+ * @scmd: SCSI command to be aborted
+ */
+static int
+megasas_abort_handler( struct scsi_cmnd* scmd )
+{
+ printk( KERN_NOTICE "megasas: ABORT -%ld cmd=%x <c=%d t=%d l=%d>\n",
+ scmd->serial_number, scmd->cmnd[0], SCP2CHANNEL(scmd),
+ SCP2TARGET(scmd), SCP2LUN(scmd));
+
+ return FAILED;
+}
+
+/**
+ * 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 = SCP2ADAPTER(scmd);
+
+ spin_unlock( instance->host_lock );
+
+ printk( KERN_NOTICE "megasas: RESET -%ld cmd=%x <c=%d t=%d l=%d>\n",
+ scmd->serial_number, scmd->cmnd[0], SCP2CHANNEL(scmd),
+ SCP2TARGET(scmd), SCP2LUN(scmd));
+
+ if (instance->hw_crit_error) {
+ printk( KERN_ERR "megasas: cannot recover from previous
reset \
+ failures\n"
);
+ spin_lock( instance->host_lock );
+ 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");
+
+ spin_lock( instance->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 )
+{
+ struct megasas_cmd* cmd;
+ struct megasas_dcmd_frame* dcmd;
+ struct megasas_instance* instance = SCP2ADAPTER(scmd);
+
+ 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 megasas_generic_reset( scmd );
+}
+
+/**
+ * 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 )
+{
+ struct megasas_cmd* cmd;
+ struct megasas_dcmd_frame* dcmd;
+ struct megasas_instance* instance = SCP2ADAPTER(scmd);
+
+ 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 megasas_generic_reset( scmd );
+}
+
+/**
+ * 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*)SCSIHOST2ADAP( shost );
+
+ 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_g = {
+
+ .module = THIS_MODULE,
+ .name = "LSI Logic SAS based MegaRAID
driver",
+ .queuecommand = megasas_queue_command,
+ .eh_abort_handler = megasas_abort_handler,
+ .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_sync_buffers - Synchronozies CPU caches after IO transfer
+ * @instance: Adapter soft state
+ * @cmd: Completed command
+ */
+static inline void
+megasas_sync_buffers(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_page( 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;
+
+ 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( instance->host_lock );
+ cmd->scmd->scsi_done( cmd->scmd );
+ spin_unlock( instance->host_lock );
+
+ instance->fw_outstanding--;
+ megasas_return_cmd( instance, cmd );
+ megasas_sync_buffers( instance, cmd );
+ break;
+ }
+
+
+ switch (hdr->cmd_status) {
+
+ case MFI_STAT_OK:
+ 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( instance->host_lock );
+ cmd->scmd->scsi_done( cmd->scmd );
+ spin_unlock( instance->host_lock );
+
+ instance->fw_outstanding--;
+
+ megasas_return_cmd( instance, cmd );
+
+ megasas_sync_buffers( 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_register_set* reg_set;
+ struct megasas_cmd* cmd;
+
+ reg_set = instance->reg_set;
+
+ /*
+ * Check if it is our interrupt
+ */
+ status = RD_OB_INTR_STATUS(reg_set);
+
+ if (! (status & MFI_OB_INTR_STATUS_MASK)) {
+ return IRQ_NONE;
+ }
+
+ /*
+ * Clear the interrupt by writing back the same value
+ */
+ WR_OB_INTR_STATUS(status, reg_set);
+
+ 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;
+ }
+ }
+
+ wmb();
+ 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 = RD_OB_MSG_0(reg_set) & MFI_STATE_MASK;
+
+ while( fw_state != MFI_STATE_READY ) {
+
+ printk( KERN_INFO "megasas: Waitinf 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
+ */
+ WR_IN_DOORBELL( MFI_INIT_CLEAR_HANDSHAKE, reg_set );
+
+ max_wait = 2;
+ cur_state = MFI_STATE_WAIT_HANDSHAKE;
+ break;
+
+ case MFI_STATE_OPERATIONAL:
+ /*
+ * Bring it to READY state; assuming max wait 2 secs
+ */
+ MFI_DISABLE_INTR(reg_set);
+ WR_IN_DOORBELL( MFI_INIT_READY, reg_set );
+
+ 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 = RD_OB_MSG_0(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;
+ 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]) {
+ int j;
+
+ 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;
+ dma_addr_t instance_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_num_sge = MFI_MAX_SUPP_SGES(reg_set);
+ instance->max_fw_cmds = MFI_MAX_SUPP_CMDS(reg_set);
+
+ /*
+ * 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_phys_addr
);
+
+ 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);
+
+ instance_h = instance->phys_addr;
+ 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_phys_addr;
+
+ initq_info->producer_index_phys_addr_lo = instance_h + offsetof(
+ struct
megasas_instance,
+ producer);
+
+ initq_info->consumer_index_phys_addr_lo = instance_h + offsetof(
+ struct
megasas_instance,
+ consumer);
+
+ 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);
+
+ /*
+ * Compue 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;
+
+ /*
+ * Reasonable size to support older firmwares
+ */
+ if (!max_sectors_1)
+ max_sectors_1 = 2048; /* 1 MB */
+
+ 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_phys_addr );
+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;
+
+ pci_free_consistent( instance->pdev, reply_q_sz,
+ instance->reply_queue,
+ instance->reply_queue_phys_addr );
+
+ 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
+ * @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 @locale
+ */
+static int
+megasas_register_aen( struct megasas_instance* instance, u32 seq_num,
+ u32 locale )
+{
+ struct megasas_cmd* cmd;
+ struct megasas_dcmd_frame* dcmd;
+ struct megasas_evt_detail* evt_detail;
+ dma_addr_t evt_detail_h;
+ u32* mbox_word;
+
+ cmd = megasas_get_cmd( instance );
+
+ if (!cmd) {
+ return -ENOMEM;
+ }
+
+ dcmd = &cmd->frame->dcmd;
+ mbox_word = (u32*) dcmd->mbox;
+ evt_detail = &instance->evt_detail;
+ evt_detail_h = instance->phys_addr +
+ offsetof(struct megasas_instance,
evt_detail);
+
+ memset( evt_detail, 0, sizeof(*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] = locale;
+ dcmd->sgl.sge32[0].phys_addr = (u32)(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
+ */
+ WR_IN_QPORT( (cmd->frame_phys_addr >> 3), 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;
+
+ host = scsi_host_alloc(&megasas_template_g, sizeof(void*));
+
+ if (!host) {
+ printk( KERN_DEBUG "megasas: scsi_host_alloc failed\n" );
+ return -ENODEV;
+ }
+
+ SCSIHOST2ADAP(host) = (caddr_t) instance;
+ instance->host = host;
+
+ /*
+ * Export parameters required by SCSI mid-layer
+ */
+ scsi_assign_lock( host, instance->host_lock );
+ 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" );
+ scsi_host_put( host );
+
+ return -ENODEV;
+ }
+
+ /*
+ * Trigger SCSI to scan our drives
+ */
+ scsi_scan_host( host );
+
+ return 0;
+}
+
+/**
+ * megasas_io_detach - Detach the driver from SCSI mid-layer
+ * @instance: Adapter soft state
+ */
+static void
+megasas_io_detach( struct megasas_instance* instance )
+{
+ if (instance->host)
+ scsi_remove_host( instance->host );
+}
+
+/**
+ * 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;
+ dma_addr_t instance_h;
+ 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;
+ }
+
+ /*
+ * We allocate DMA memory for instance soft state so that we can
+ * can directly pass adp->{member variable} to FW to get FW data.
+ * E.g, product information, configuration data etc.
+ */
+ instance = pci_alloc_consistent( pdev, sizeof(struct
megasas_instance),
+ &instance_h
);
+
+ if (!instance) {
+ printk(KERN_DEBUG "megasas: Failed to allocate memory \
+ for controller soft state \n" );
+ goto fail_alloc_instance;
+ }
+
+ memset( instance, 0, sizeof(*instance) );
+
+ /*
+ * Initialize locks and queues
+ */
+ INIT_LIST_HEAD( &instance->cmd_pool );
+
+ init_waitqueue_head( &instance->int_cmd_wait_q );
+ init_waitqueue_head( &instance->abort_cmd_wait_q );
+
+ spin_lock_init( &instance->cmd_pool_lock );
+ spin_lock_init( &instance->lock );
+
+ instance->host_lock = &instance->lock;
+
+ /*
+ * Initialize PCI related and misc parameters
+ */
+ instance->phys_addr = instance_h;
+ instance->pdev = pdev;
+ instance->unique_id = pdev->bus->number << 8 | pdev->devfn;
+ instance->init_id = MEGASAS_DEFAULT_INIT_ID;
+ instance->aen_cmd = NULL;
+
+ /*
+ * 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;
+ }
+
+ MFI_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 );
+ MFI_DISABLE_INTR(instance->reg_set);
+ free_irq( instance->pdev->irq, instance );
+
+ megasas_release_mfi( instance );
+
+fail_irq:
+fail_init_mfi:
+ pci_free_consistent( pdev, sizeof(struct megasas_instance),
+ instance, instance_h );
+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;
+ dma_addr_t instance_h;
+
+ instance = pci_get_drvdata( pdev );
+ host = instance->host;
+ instance_h = instance->phys_addr;
+
+ megasas_io_detach( instance );
+
+ 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 );
+
+ MFI_DISABLE_INTR(instance->reg_set);
+
+ free_irq( instance->pdev->irq, instance );
+
+ megasas_release_mfi( instance );
+
+ pci_free_consistent( instance->pdev, sizeof(struct
megasas_instance),
+ instance, instance_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 )
+{
+ int i;
+ struct megasas_instance* instance;
+
+ for( i = 0; i < megasas_mgmt_info.max_index; i++ ) {
+ instance = megasas_mgmt_info.instance[i];
+
+ if (instance)
+ megasas_shutdown_controller( 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 locale;
+ u32 seq_num;
+ u32* mbox_word;
+ struct megasas_cmd* old_cmd;
+
+ 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;
+ }
+
+ mbox_word = (u32*) kdcmd->mbox;
+ seq_num = mbox_word[0];
+ locale = mbox_word[1];
+ old_cmd = instance->aen_cmd;
+
+ /*
+ * If there is an AEN pending already (old_cmd), abort that
+ * before issuing a fresh subsricption for AEN
+ */
+ if (old_cmd) {
+ old_cmd->abort_aen = 1;
+ rc = megasas_issue_blocked_abort_cmd(instance,
old_cmd);
+
+ if (rc) {
+ printk(KERN_DEBUG "megasas: Failed to abort
\
+ previous AEN\n" );
+ break;
+ }
+ }
+
+ rc = megasas_register_aen( instance, seq_num, locale );
+
+ 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,
+ struct file* filep )
+{
+ 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_g,
+ .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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  Last update: 2005-05-16 10:33    [from the cache]
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