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linux-sg2042/drivers/scsi/mvumi.c

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/*
* Marvell UMI driver
*
* Copyright 2011 Marvell. <jyli@marvell.com>
*
* This file is licensed under GPLv2.
*
* 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; version 2 of the
* License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/pci.h>
#include <linux/list.h>
#include <linux/spinlock.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/blkdev.h>
#include <linux/io.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_transport.h>
#include <scsi/scsi_eh.h>
#include <linux/uaccess.h>
#include "mvumi.h"
MODULE_LICENSE("GPL");
MODULE_AUTHOR("jyli@marvell.com");
MODULE_DESCRIPTION("Marvell UMI Driver");
static DEFINE_PCI_DEVICE_TABLE(mvumi_pci_table) = {
{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL_2, PCI_DEVICE_ID_MARVELL_MV9143) },
{ 0 }
};
MODULE_DEVICE_TABLE(pci, mvumi_pci_table);
static void tag_init(struct mvumi_tag *st, unsigned short size)
{
unsigned short i;
BUG_ON(size != st->size);
st->top = size;
for (i = 0; i < size; i++)
st->stack[i] = size - 1 - i;
}
static unsigned short tag_get_one(struct mvumi_hba *mhba, struct mvumi_tag *st)
{
BUG_ON(st->top <= 0);
return st->stack[--st->top];
}
static void tag_release_one(struct mvumi_hba *mhba, struct mvumi_tag *st,
unsigned short tag)
{
BUG_ON(st->top >= st->size);
st->stack[st->top++] = tag;
}
static bool tag_is_empty(struct mvumi_tag *st)
{
if (st->top == 0)
return 1;
else
return 0;
}
static void mvumi_unmap_pci_addr(struct pci_dev *dev, void **addr_array)
{
int i;
for (i = 0; i < MAX_BASE_ADDRESS; i++)
if ((pci_resource_flags(dev, i) & IORESOURCE_MEM) &&
addr_array[i])
pci_iounmap(dev, addr_array[i]);
}
static int mvumi_map_pci_addr(struct pci_dev *dev, void **addr_array)
{
int i;
for (i = 0; i < MAX_BASE_ADDRESS; i++) {
if (pci_resource_flags(dev, i) & IORESOURCE_MEM) {
addr_array[i] = pci_iomap(dev, i, 0);
if (!addr_array[i]) {
dev_err(&dev->dev, "failed to map Bar[%d]\n",
i);
mvumi_unmap_pci_addr(dev, addr_array);
return -ENOMEM;
}
} else
addr_array[i] = NULL;
dev_dbg(&dev->dev, "Bar %d : %p.\n", i, addr_array[i]);
}
return 0;
}
static struct mvumi_res *mvumi_alloc_mem_resource(struct mvumi_hba *mhba,
enum resource_type type, unsigned int size)
{
struct mvumi_res *res = kzalloc(sizeof(*res), GFP_KERNEL);
if (!res) {
dev_err(&mhba->pdev->dev,
"Failed to allocate memory for resouce manager.\n");
return NULL;
}
switch (type) {
case RESOURCE_CACHED_MEMORY:
res->virt_addr = kzalloc(size, GFP_KERNEL);
if (!res->virt_addr) {
dev_err(&mhba->pdev->dev,
"unable to allocate memory,size = %d.\n", size);
kfree(res);
return NULL;
}
break;
case RESOURCE_UNCACHED_MEMORY:
size = round_up(size, 8);
res->virt_addr = pci_alloc_consistent(mhba->pdev, size,
&res->bus_addr);
if (!res->virt_addr) {
dev_err(&mhba->pdev->dev,
"unable to allocate consistent mem,"
"size = %d.\n", size);
kfree(res);
return NULL;
}
memset(res->virt_addr, 0, size);
break;
default:
dev_err(&mhba->pdev->dev, "unknown resource type %d.\n", type);
kfree(res);
return NULL;
}
res->type = type;
res->size = size;
INIT_LIST_HEAD(&res->entry);
list_add_tail(&res->entry, &mhba->res_list);
return res;
}
static void mvumi_release_mem_resource(struct mvumi_hba *mhba)
{
struct mvumi_res *res, *tmp;
list_for_each_entry_safe(res, tmp, &mhba->res_list, entry) {
switch (res->type) {
case RESOURCE_UNCACHED_MEMORY:
pci_free_consistent(mhba->pdev, res->size,
res->virt_addr, res->bus_addr);
break;
case RESOURCE_CACHED_MEMORY:
kfree(res->virt_addr);
break;
default:
dev_err(&mhba->pdev->dev,
"unknown resource type %d\n", res->type);
break;
}
list_del(&res->entry);
kfree(res);
}
mhba->fw_flag &= ~MVUMI_FW_ALLOC;
}
/**
* mvumi_make_sgl - Prepares SGL
* @mhba: Adapter soft state
* @scmd: SCSI command from the mid-layer
* @sgl_p: SGL to be filled in
* @sg_count return the number of SG elements
*
* If successful, this function returns 0. otherwise, it returns -1.
*/
static int mvumi_make_sgl(struct mvumi_hba *mhba, struct scsi_cmnd *scmd,
void *sgl_p, unsigned char *sg_count)
{
struct scatterlist *sg;
struct mvumi_sgl *m_sg = (struct mvumi_sgl *) sgl_p;
unsigned int i;
unsigned int sgnum = scsi_sg_count(scmd);
dma_addr_t busaddr;
if (sgnum) {
sg = scsi_sglist(scmd);
*sg_count = pci_map_sg(mhba->pdev, sg, sgnum,
(int) scmd->sc_data_direction);
if (*sg_count > mhba->max_sge) {
dev_err(&mhba->pdev->dev, "sg count[0x%x] is bigger "
"than max sg[0x%x].\n",
*sg_count, mhba->max_sge);
return -1;
}
for (i = 0; i < *sg_count; i++) {
busaddr = sg_dma_address(&sg[i]);
m_sg->baseaddr_l = cpu_to_le32(lower_32_bits(busaddr));
m_sg->baseaddr_h = cpu_to_le32(upper_32_bits(busaddr));
m_sg->flags = 0;
m_sg->size = cpu_to_le32(sg_dma_len(&sg[i]));
if ((i + 1) == *sg_count)
m_sg->flags |= SGD_EOT;
m_sg++;
}
} else {
scmd->SCp.dma_handle = scsi_bufflen(scmd) ?
pci_map_single(mhba->pdev, scsi_sglist(scmd),
scsi_bufflen(scmd),
(int) scmd->sc_data_direction)
: 0;
busaddr = scmd->SCp.dma_handle;
m_sg->baseaddr_l = cpu_to_le32(lower_32_bits(busaddr));
m_sg->baseaddr_h = cpu_to_le32(upper_32_bits(busaddr));
m_sg->flags = SGD_EOT;
m_sg->size = cpu_to_le32(scsi_bufflen(scmd));
*sg_count = 1;
}
return 0;
}
static int mvumi_internal_cmd_sgl(struct mvumi_hba *mhba, struct mvumi_cmd *cmd,
unsigned int size)
{
struct mvumi_sgl *m_sg;
void *virt_addr;
dma_addr_t phy_addr;
if (size == 0)
return 0;
virt_addr = pci_alloc_consistent(mhba->pdev, size, &phy_addr);
if (!virt_addr)
return -1;
memset(virt_addr, 0, size);
m_sg = (struct mvumi_sgl *) &cmd->frame->payload[0];
cmd->frame->sg_counts = 1;
cmd->data_buf = virt_addr;
m_sg->baseaddr_l = cpu_to_le32(lower_32_bits(phy_addr));
m_sg->baseaddr_h = cpu_to_le32(upper_32_bits(phy_addr));
m_sg->flags = SGD_EOT;
m_sg->size = cpu_to_le32(size);
return 0;
}
static struct mvumi_cmd *mvumi_create_internal_cmd(struct mvumi_hba *mhba,
unsigned int buf_size)
{
struct mvumi_cmd *cmd;
cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
if (!cmd) {
dev_err(&mhba->pdev->dev, "failed to create a internal cmd\n");
return NULL;
}
INIT_LIST_HEAD(&cmd->queue_pointer);
cmd->frame = kzalloc(mhba->ib_max_size, GFP_KERNEL);
if (!cmd->frame) {
dev_err(&mhba->pdev->dev, "failed to allocate memory for FW"
" frame,size = %d.\n", mhba->ib_max_size);
kfree(cmd);
return NULL;
}
if (buf_size) {
if (mvumi_internal_cmd_sgl(mhba, cmd, buf_size)) {
dev_err(&mhba->pdev->dev, "failed to allocate memory"
" for internal frame\n");
kfree(cmd->frame);
kfree(cmd);
return NULL;
}
} else
cmd->frame->sg_counts = 0;
return cmd;
}
static void mvumi_delete_internal_cmd(struct mvumi_hba *mhba,
struct mvumi_cmd *cmd)
{
struct mvumi_sgl *m_sg;
unsigned int size;
dma_addr_t phy_addr;
if (cmd && cmd->frame) {
if (cmd->frame->sg_counts) {
m_sg = (struct mvumi_sgl *) &cmd->frame->payload[0];
size = m_sg->size;
phy_addr = (dma_addr_t) m_sg->baseaddr_l |
(dma_addr_t) ((m_sg->baseaddr_h << 16) << 16);
pci_free_consistent(mhba->pdev, size, cmd->data_buf,
phy_addr);
}
kfree(cmd->frame);
kfree(cmd);
}
}
/**
* mvumi_get_cmd - Get a command from the free pool
* @mhba: Adapter soft state
*
* Returns a free command from the pool
*/
static struct mvumi_cmd *mvumi_get_cmd(struct mvumi_hba *mhba)
{
struct mvumi_cmd *cmd = NULL;
if (likely(!list_empty(&mhba->cmd_pool))) {
cmd = list_entry((&mhba->cmd_pool)->next,
struct mvumi_cmd, queue_pointer);
list_del_init(&cmd->queue_pointer);
} else
dev_warn(&mhba->pdev->dev, "command pool is empty!\n");
return cmd;
}
/**
* mvumi_return_cmd - Return a cmd to free command pool
* @mhba: Adapter soft state
* @cmd: Command packet to be returned to free command pool
*/
static inline void mvumi_return_cmd(struct mvumi_hba *mhba,
struct mvumi_cmd *cmd)
{
cmd->scmd = NULL;
list_add_tail(&cmd->queue_pointer, &mhba->cmd_pool);
}
/**
* mvumi_free_cmds - Free all the cmds in the free cmd pool
* @mhba: Adapter soft state
*/
static void mvumi_free_cmds(struct mvumi_hba *mhba)
{
struct mvumi_cmd *cmd;
while (!list_empty(&mhba->cmd_pool)) {
cmd = list_first_entry(&mhba->cmd_pool, struct mvumi_cmd,
queue_pointer);
list_del(&cmd->queue_pointer);
kfree(cmd->frame);
kfree(cmd);
}
}
/**
* mvumi_alloc_cmds - Allocates the command packets
* @mhba: Adapter soft state
*
*/
static int mvumi_alloc_cmds(struct mvumi_hba *mhba)
{
int i;
struct mvumi_cmd *cmd;
for (i = 0; i < mhba->max_io; i++) {
cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
if (!cmd)
goto err_exit;
INIT_LIST_HEAD(&cmd->queue_pointer);
list_add_tail(&cmd->queue_pointer, &mhba->cmd_pool);
cmd->frame = kzalloc(mhba->ib_max_size, GFP_KERNEL);
if (!cmd->frame)
goto err_exit;
}
return 0;
err_exit:
dev_err(&mhba->pdev->dev,
"failed to allocate memory for cmd[0x%x].\n", i);
while (!list_empty(&mhba->cmd_pool)) {
cmd = list_first_entry(&mhba->cmd_pool, struct mvumi_cmd,
queue_pointer);
list_del(&cmd->queue_pointer);
kfree(cmd->frame);
kfree(cmd);
}
return -ENOMEM;
}
static int mvumi_get_ib_list_entry(struct mvumi_hba *mhba, void **ib_entry)
{
unsigned int ib_rp_reg, cur_ib_entry;
if (atomic_read(&mhba->fw_outstanding) >= mhba->max_io) {
dev_warn(&mhba->pdev->dev, "firmware io overflow.\n");
return -1;
}
ib_rp_reg = ioread32(mhba->mmio + CLA_INB_READ_POINTER);
if (unlikely(((ib_rp_reg & CL_SLOT_NUM_MASK) ==
(mhba->ib_cur_slot & CL_SLOT_NUM_MASK)) &&
((ib_rp_reg & CL_POINTER_TOGGLE) !=
(mhba->ib_cur_slot & CL_POINTER_TOGGLE)))) {
dev_warn(&mhba->pdev->dev, "no free slot to use.\n");
return -1;
}
cur_ib_entry = mhba->ib_cur_slot & CL_SLOT_NUM_MASK;
cur_ib_entry++;
if (cur_ib_entry >= mhba->list_num_io) {
cur_ib_entry -= mhba->list_num_io;
mhba->ib_cur_slot ^= CL_POINTER_TOGGLE;
}
mhba->ib_cur_slot &= ~CL_SLOT_NUM_MASK;
mhba->ib_cur_slot |= (cur_ib_entry & CL_SLOT_NUM_MASK);
*ib_entry = mhba->ib_list + cur_ib_entry * mhba->ib_max_size;
atomic_inc(&mhba->fw_outstanding);
return 0;
}
static void mvumi_send_ib_list_entry(struct mvumi_hba *mhba)
{
iowrite32(0xfff, mhba->ib_shadow);
iowrite32(mhba->ib_cur_slot, mhba->mmio + CLA_INB_WRITE_POINTER);
}
static char mvumi_check_ob_frame(struct mvumi_hba *mhba,
unsigned int cur_obf, struct mvumi_rsp_frame *p_outb_frame)
{
unsigned short tag, request_id;
udelay(1);
p_outb_frame = mhba->ob_list + cur_obf * mhba->ob_max_size;
request_id = p_outb_frame->request_id;
tag = p_outb_frame->tag;
if (tag > mhba->tag_pool.size) {
dev_err(&mhba->pdev->dev, "ob frame data error\n");
return -1;
}
if (mhba->tag_cmd[tag] == NULL) {
dev_err(&mhba->pdev->dev, "tag[0x%x] with NO command\n", tag);
return -1;
} else if (mhba->tag_cmd[tag]->request_id != request_id &&
mhba->request_id_enabled) {
dev_err(&mhba->pdev->dev, "request ID from FW:0x%x,"
"cmd request ID:0x%x\n", request_id,
mhba->tag_cmd[tag]->request_id);
return -1;
}
return 0;
}
static void mvumi_receive_ob_list_entry(struct mvumi_hba *mhba)
{
unsigned int ob_write_reg, ob_write_shadow_reg;
unsigned int cur_obf, assign_obf_end, i;
struct mvumi_ob_data *ob_data;
struct mvumi_rsp_frame *p_outb_frame;
do {
ob_write_reg = ioread32(mhba->mmio + CLA_OUTB_COPY_POINTER);
ob_write_shadow_reg = ioread32(mhba->ob_shadow);
} while ((ob_write_reg & CL_SLOT_NUM_MASK) != ob_write_shadow_reg);
cur_obf = mhba->ob_cur_slot & CL_SLOT_NUM_MASK;
assign_obf_end = ob_write_reg & CL_SLOT_NUM_MASK;
if ((ob_write_reg & CL_POINTER_TOGGLE) !=
(mhba->ob_cur_slot & CL_POINTER_TOGGLE)) {
assign_obf_end += mhba->list_num_io;
}
for (i = (assign_obf_end - cur_obf); i != 0; i--) {
cur_obf++;
if (cur_obf >= mhba->list_num_io) {
cur_obf -= mhba->list_num_io;
mhba->ob_cur_slot ^= CL_POINTER_TOGGLE;
}
p_outb_frame = mhba->ob_list + cur_obf * mhba->ob_max_size;
/* Copy pointer may point to entry in outbound list
* before entry has valid data
*/
if (unlikely(p_outb_frame->tag > mhba->tag_pool.size ||
mhba->tag_cmd[p_outb_frame->tag] == NULL ||
p_outb_frame->request_id !=
mhba->tag_cmd[p_outb_frame->tag]->request_id))
if (mvumi_check_ob_frame(mhba, cur_obf, p_outb_frame))
continue;
if (!list_empty(&mhba->ob_data_list)) {
ob_data = (struct mvumi_ob_data *)
list_first_entry(&mhba->ob_data_list,
struct mvumi_ob_data, list);
list_del_init(&ob_data->list);
} else {
ob_data = NULL;
if (cur_obf == 0) {
cur_obf = mhba->list_num_io - 1;
mhba->ob_cur_slot ^= CL_POINTER_TOGGLE;
} else
cur_obf -= 1;
break;
}
memcpy(ob_data->data, p_outb_frame, mhba->ob_max_size);
p_outb_frame->tag = 0xff;
list_add_tail(&ob_data->list, &mhba->free_ob_list);
}
mhba->ob_cur_slot &= ~CL_SLOT_NUM_MASK;
mhba->ob_cur_slot |= (cur_obf & CL_SLOT_NUM_MASK);
iowrite32(mhba->ob_cur_slot, mhba->mmio + CLA_OUTB_READ_POINTER);
}
static void mvumi_reset(void *regs)
{
iowrite32(0, regs + CPU_ENPOINTA_MASK_REG);
if (ioread32(regs + CPU_ARM_TO_PCIEA_MSG1) != HANDSHAKE_DONESTATE)
return;
iowrite32(DRBL_SOFT_RESET, regs + CPU_PCIEA_TO_ARM_DRBL_REG);
}
static unsigned char mvumi_start(struct mvumi_hba *mhba);
static int mvumi_wait_for_outstanding(struct mvumi_hba *mhba)
{
mhba->fw_state = FW_STATE_ABORT;
mvumi_reset(mhba->mmio);
if (mvumi_start(mhba))
return FAILED;
else
return SUCCESS;
}
static int mvumi_host_reset(struct scsi_cmnd *scmd)
{
struct mvumi_hba *mhba;
mhba = (struct mvumi_hba *) scmd->device->host->hostdata;
scmd_printk(KERN_NOTICE, scmd, "RESET -%ld cmd=%x retries=%x\n",
scmd->serial_number, scmd->cmnd[0], scmd->retries);
return mvumi_wait_for_outstanding(mhba);
}
static int mvumi_issue_blocked_cmd(struct mvumi_hba *mhba,
struct mvumi_cmd *cmd)
{
unsigned long flags;
cmd->cmd_status = REQ_STATUS_PENDING;
if (atomic_read(&cmd->sync_cmd)) {
dev_err(&mhba->pdev->dev,
"last blocked cmd not finished, sync_cmd = %d\n",
atomic_read(&cmd->sync_cmd));
BUG_ON(1);
return -1;
}
atomic_inc(&cmd->sync_cmd);
spin_lock_irqsave(mhba->shost->host_lock, flags);
mhba->instancet->fire_cmd(mhba, cmd);
spin_unlock_irqrestore(mhba->shost->host_lock, flags);
wait_event_timeout(mhba->int_cmd_wait_q,
(cmd->cmd_status != REQ_STATUS_PENDING),
MVUMI_INTERNAL_CMD_WAIT_TIME * HZ);
/* command timeout */
if (atomic_read(&cmd->sync_cmd)) {
spin_lock_irqsave(mhba->shost->host_lock, flags);
atomic_dec(&cmd->sync_cmd);
if (mhba->tag_cmd[cmd->frame->tag]) {
mhba->tag_cmd[cmd->frame->tag] = 0;
dev_warn(&mhba->pdev->dev, "TIMEOUT:release tag [%d]\n",
cmd->frame->tag);
tag_release_one(mhba, &mhba->tag_pool, cmd->frame->tag);
}
if (!list_empty(&cmd->queue_pointer)) {
dev_warn(&mhba->pdev->dev,
"TIMEOUT:A internal command doesn't send!\n");
list_del_init(&cmd->queue_pointer);
} else
atomic_dec(&mhba->fw_outstanding);
spin_unlock_irqrestore(mhba->shost->host_lock, flags);
}
return 0;
}
static void mvumi_release_fw(struct mvumi_hba *mhba)
{
mvumi_free_cmds(mhba);
mvumi_release_mem_resource(mhba);
mvumi_unmap_pci_addr(mhba->pdev, mhba->base_addr);
kfree(mhba->handshake_page);
pci_release_regions(mhba->pdev);
}
static unsigned char mvumi_flush_cache(struct mvumi_hba *mhba)
{
struct mvumi_cmd *cmd;
struct mvumi_msg_frame *frame;
unsigned char device_id, retry = 0;
unsigned char bitcount = sizeof(unsigned char) * 8;
for (device_id = 0; device_id < mhba->max_target_id; device_id++) {
if (!(mhba->target_map[device_id / bitcount] &
(1 << (device_id % bitcount))))
continue;
get_cmd: cmd = mvumi_create_internal_cmd(mhba, 0);
if (!cmd) {
if (retry++ >= 5) {
dev_err(&mhba->pdev->dev, "failed to get memory"
" for internal flush cache cmd for "
"device %d", device_id);
retry = 0;
continue;
} else
goto get_cmd;
}
cmd->scmd = NULL;
cmd->cmd_status = REQ_STATUS_PENDING;
atomic_set(&cmd->sync_cmd, 0);
frame = cmd->frame;
frame->req_function = CL_FUN_SCSI_CMD;
frame->device_id = device_id;
frame->cmd_flag = CMD_FLAG_NON_DATA;
frame->data_transfer_length = 0;
frame->cdb_length = MAX_COMMAND_SIZE;
memset(frame->cdb, 0, MAX_COMMAND_SIZE);
frame->cdb[0] = SCSI_CMD_MARVELL_SPECIFIC;
frame->cdb[2] = CDB_CORE_SHUTDOWN;
mvumi_issue_blocked_cmd(mhba, cmd);
if (cmd->cmd_status != SAM_STAT_GOOD) {
dev_err(&mhba->pdev->dev,
"device %d flush cache failed, status=0x%x.\n",
device_id, cmd->cmd_status);
}
mvumi_delete_internal_cmd(mhba, cmd);
}
return 0;
}
static unsigned char
mvumi_calculate_checksum(struct mvumi_hs_header *p_header,
unsigned short len)
{
unsigned char *ptr;
unsigned char ret = 0, i;
ptr = (unsigned char *) p_header->frame_content;
for (i = 0; i < len; i++) {
ret ^= *ptr;
ptr++;
}
return ret;
}
void mvumi_hs_build_page(struct mvumi_hba *mhba,
struct mvumi_hs_header *hs_header)
{
struct mvumi_hs_page2 *hs_page2;
struct mvumi_hs_page4 *hs_page4;
struct mvumi_hs_page3 *hs_page3;
struct timeval time;
unsigned int local_time;
switch (hs_header->page_code) {
case HS_PAGE_HOST_INFO:
hs_page2 = (struct mvumi_hs_page2 *) hs_header;
hs_header->frame_length = sizeof(*hs_page2) - 4;
memset(hs_header->frame_content, 0, hs_header->frame_length);
hs_page2->host_type = 3; /* 3 mean linux*/
hs_page2->host_ver.ver_major = VER_MAJOR;
hs_page2->host_ver.ver_minor = VER_MINOR;
hs_page2->host_ver.ver_oem = VER_OEM;
hs_page2->host_ver.ver_build = VER_BUILD;
hs_page2->system_io_bus = 0;
hs_page2->slot_number = 0;
hs_page2->intr_level = 0;
hs_page2->intr_vector = 0;
do_gettimeofday(&time);
local_time = (unsigned int) (time.tv_sec -
(sys_tz.tz_minuteswest * 60));
hs_page2->seconds_since1970 = local_time;
hs_header->checksum = mvumi_calculate_checksum(hs_header,
hs_header->frame_length);
break;
case HS_PAGE_FIRM_CTL:
hs_page3 = (struct mvumi_hs_page3 *) hs_header;
hs_header->frame_length = sizeof(*hs_page3) - 4;
memset(hs_header->frame_content, 0, hs_header->frame_length);
hs_header->checksum = mvumi_calculate_checksum(hs_header,
hs_header->frame_length);
break;
case HS_PAGE_CL_INFO:
hs_page4 = (struct mvumi_hs_page4 *) hs_header;
hs_header->frame_length = sizeof(*hs_page4) - 4;
memset(hs_header->frame_content, 0, hs_header->frame_length);
hs_page4->ib_baseaddr_l = lower_32_bits(mhba->ib_list_phys);
hs_page4->ib_baseaddr_h = upper_32_bits(mhba->ib_list_phys);
hs_page4->ob_baseaddr_l = lower_32_bits(mhba->ob_list_phys);
hs_page4->ob_baseaddr_h = upper_32_bits(mhba->ob_list_phys);
hs_page4->ib_entry_size = mhba->ib_max_size_setting;
hs_page4->ob_entry_size = mhba->ob_max_size_setting;
hs_page4->ob_depth = mhba->list_num_io;
hs_page4->ib_depth = mhba->list_num_io;
hs_header->checksum = mvumi_calculate_checksum(hs_header,
hs_header->frame_length);
break;
default:
dev_err(&mhba->pdev->dev, "cannot build page, code[0x%x]\n",
hs_header->page_code);
break;
}
}
/**
* mvumi_init_data - Initialize requested date for FW
* @mhba: Adapter soft state
*/
static int mvumi_init_data(struct mvumi_hba *mhba)
{
struct mvumi_ob_data *ob_pool;
struct mvumi_res *res_mgnt;
unsigned int tmp_size, offset, i;
void *virmem, *v;
dma_addr_t p;
if (mhba->fw_flag & MVUMI_FW_ALLOC)
return 0;
tmp_size = mhba->ib_max_size * mhba->max_io;
tmp_size += 128 + mhba->ob_max_size * mhba->max_io;
tmp_size += 8 + sizeof(u32) + 16;
res_mgnt = mvumi_alloc_mem_resource(mhba,
RESOURCE_UNCACHED_MEMORY, tmp_size);
if (!res_mgnt) {
dev_err(&mhba->pdev->dev,
"failed to allocate memory for inbound list\n");
goto fail_alloc_dma_buf;
}
p = res_mgnt->bus_addr;
v = res_mgnt->virt_addr;
/* ib_list */
offset = round_up(p, 128) - p;
p += offset;
v += offset;
mhba->ib_list = v;
mhba->ib_list_phys = p;
v += mhba->ib_max_size * mhba->max_io;
p += mhba->ib_max_size * mhba->max_io;
/* ib shadow */
offset = round_up(p, 8) - p;
p += offset;
v += offset;
mhba->ib_shadow = v;
mhba->ib_shadow_phys = p;
p += sizeof(u32);
v += sizeof(u32);
/* ob shadow */
offset = round_up(p, 8) - p;
p += offset;
v += offset;
mhba->ob_shadow = v;
mhba->ob_shadow_phys = p;
p += 8;
v += 8;
/* ob list */
offset = round_up(p, 128) - p;
p += offset;
v += offset;
mhba->ob_list = v;
mhba->ob_list_phys = p;
/* ob data pool */
tmp_size = mhba->max_io * (mhba->ob_max_size + sizeof(*ob_pool));
tmp_size = round_up(tmp_size, 8);
res_mgnt = mvumi_alloc_mem_resource(mhba,
RESOURCE_CACHED_MEMORY, tmp_size);
if (!res_mgnt) {
dev_err(&mhba->pdev->dev,
"failed to allocate memory for outbound data buffer\n");
goto fail_alloc_dma_buf;
}
virmem = res_mgnt->virt_addr;
for (i = mhba->max_io; i != 0; i--) {
ob_pool = (struct mvumi_ob_data *) virmem;
list_add_tail(&ob_pool->list, &mhba->ob_data_list);
virmem += mhba->ob_max_size + sizeof(*ob_pool);
}
tmp_size = sizeof(unsigned short) * mhba->max_io +
sizeof(struct mvumi_cmd *) * mhba->max_io;
tmp_size += round_up(mhba->max_target_id, sizeof(unsigned char) * 8) /
(sizeof(unsigned char) * 8);
res_mgnt = mvumi_alloc_mem_resource(mhba,
RESOURCE_CACHED_MEMORY, tmp_size);
if (!res_mgnt) {
dev_err(&mhba->pdev->dev,
"failed to allocate memory for tag and target map\n");
goto fail_alloc_dma_buf;
}
virmem = res_mgnt->virt_addr;
mhba->tag_pool.stack = virmem;
mhba->tag_pool.size = mhba->max_io;
tag_init(&mhba->tag_pool, mhba->max_io);
virmem += sizeof(unsigned short) * mhba->max_io;
mhba->tag_cmd = virmem;
virmem += sizeof(struct mvumi_cmd *) * mhba->max_io;
mhba->target_map = virmem;
mhba->fw_flag |= MVUMI_FW_ALLOC;
return 0;
fail_alloc_dma_buf:
mvumi_release_mem_resource(mhba);
return -1;
}
static int mvumi_hs_process_page(struct mvumi_hba *mhba,
struct mvumi_hs_header *hs_header)
{
struct mvumi_hs_page1 *hs_page1;
unsigned char page_checksum;
page_checksum = mvumi_calculate_checksum(hs_header,
hs_header->frame_length);
if (page_checksum != hs_header->checksum) {
dev_err(&mhba->pdev->dev, "checksum error\n");
return -1;
}
switch (hs_header->page_code) {
case HS_PAGE_FIRM_CAP:
hs_page1 = (struct mvumi_hs_page1 *) hs_header;
mhba->max_io = hs_page1->max_io_support;
mhba->list_num_io = hs_page1->cl_inout_list_depth;
mhba->max_transfer_size = hs_page1->max_transfer_size;
mhba->max_target_id = hs_page1->max_devices_support;
mhba->hba_capability = hs_page1->capability;
mhba->ib_max_size_setting = hs_page1->cl_in_max_entry_size;
mhba->ib_max_size = (1 << hs_page1->cl_in_max_entry_size) << 2;
mhba->ob_max_size_setting = hs_page1->cl_out_max_entry_size;
mhba->ob_max_size = (1 << hs_page1->cl_out_max_entry_size) << 2;
dev_dbg(&mhba->pdev->dev, "FW version:%d\n",
hs_page1->fw_ver.ver_build);
break;
default:
dev_err(&mhba->pdev->dev, "handshake: page code error\n");
return -1;
}
return 0;
}
/**
* mvumi_handshake - Move the FW to READY state
* @mhba: Adapter soft state
*
* During the initialization, FW passes can potentially be in any one of
* several possible states. If the FW in operational, waiting-for-handshake
* states, driver must take steps to bring it to ready state. Otherwise, it
* has to wait for the ready state.
*/
static int mvumi_handshake(struct mvumi_hba *mhba)
{
unsigned int hs_state, tmp, hs_fun;
struct mvumi_hs_header *hs_header;
void *regs = mhba->mmio;
if (mhba->fw_state == FW_STATE_STARTING)
hs_state = HS_S_START;
else {
tmp = ioread32(regs + CPU_ARM_TO_PCIEA_MSG0);
hs_state = HS_GET_STATE(tmp);
dev_dbg(&mhba->pdev->dev, "handshake state[0x%x].\n", hs_state);
if (HS_GET_STATUS(tmp) != HS_STATUS_OK) {
mhba->fw_state = FW_STATE_STARTING;
return -1;
}
}
hs_fun = 0;
switch (hs_state) {
case HS_S_START:
mhba->fw_state = FW_STATE_HANDSHAKING;
HS_SET_STATUS(hs_fun, HS_STATUS_OK);
HS_SET_STATE(hs_fun, HS_S_RESET);
iowrite32(HANDSHAKE_SIGNATURE, regs + CPU_PCIEA_TO_ARM_MSG1);
iowrite32(hs_fun, regs + CPU_PCIEA_TO_ARM_MSG0);
iowrite32(DRBL_HANDSHAKE, regs + CPU_PCIEA_TO_ARM_DRBL_REG);
break;
case HS_S_RESET:
iowrite32(lower_32_bits(mhba->handshake_page_phys),
regs + CPU_PCIEA_TO_ARM_MSG1);
iowrite32(upper_32_bits(mhba->handshake_page_phys),
regs + CPU_ARM_TO_PCIEA_MSG1);
HS_SET_STATUS(hs_fun, HS_STATUS_OK);
HS_SET_STATE(hs_fun, HS_S_PAGE_ADDR);
iowrite32(hs_fun, regs + CPU_PCIEA_TO_ARM_MSG0);
iowrite32(DRBL_HANDSHAKE, regs + CPU_PCIEA_TO_ARM_DRBL_REG);
break;
case HS_S_PAGE_ADDR:
case HS_S_QUERY_PAGE:
case HS_S_SEND_PAGE:
hs_header = (struct mvumi_hs_header *) mhba->handshake_page;
if (hs_header->page_code == HS_PAGE_FIRM_CAP) {
mhba->hba_total_pages =
((struct mvumi_hs_page1 *) hs_header)->total_pages;
if (mhba->hba_total_pages == 0)
mhba->hba_total_pages = HS_PAGE_TOTAL-1;
}
if (hs_state == HS_S_QUERY_PAGE) {
if (mvumi_hs_process_page(mhba, hs_header)) {
HS_SET_STATE(hs_fun, HS_S_ABORT);
return -1;
}
if (mvumi_init_data(mhba)) {
HS_SET_STATE(hs_fun, HS_S_ABORT);
return -1;
}
} else if (hs_state == HS_S_PAGE_ADDR) {
hs_header->page_code = 0;
mhba->hba_total_pages = HS_PAGE_TOTAL-1;
}
if ((hs_header->page_code + 1) <= mhba->hba_total_pages) {
hs_header->page_code++;
if (hs_header->page_code != HS_PAGE_FIRM_CAP) {
mvumi_hs_build_page(mhba, hs_header);
HS_SET_STATE(hs_fun, HS_S_SEND_PAGE);
} else
HS_SET_STATE(hs_fun, HS_S_QUERY_PAGE);
} else
HS_SET_STATE(hs_fun, HS_S_END);
HS_SET_STATUS(hs_fun, HS_STATUS_OK);
iowrite32(hs_fun, regs + CPU_PCIEA_TO_ARM_MSG0);
iowrite32(DRBL_HANDSHAKE, regs + CPU_PCIEA_TO_ARM_DRBL_REG);
break;
case HS_S_END:
/* Set communication list ISR */
tmp = ioread32(regs + CPU_ENPOINTA_MASK_REG);
tmp |= INT_MAP_COMAOUT | INT_MAP_COMAERR;
iowrite32(tmp, regs + CPU_ENPOINTA_MASK_REG);
iowrite32(mhba->list_num_io, mhba->ib_shadow);
/* Set InBound List Avaliable count shadow */
iowrite32(lower_32_bits(mhba->ib_shadow_phys),
regs + CLA_INB_AVAL_COUNT_BASEL);
iowrite32(upper_32_bits(mhba->ib_shadow_phys),
regs + CLA_INB_AVAL_COUNT_BASEH);
/* Set OutBound List Avaliable count shadow */
iowrite32((mhba->list_num_io-1) | CL_POINTER_TOGGLE,
mhba->ob_shadow);
iowrite32(lower_32_bits(mhba->ob_shadow_phys), regs + 0x5B0);
iowrite32(upper_32_bits(mhba->ob_shadow_phys), regs + 0x5B4);
mhba->ib_cur_slot = (mhba->list_num_io - 1) | CL_POINTER_TOGGLE;
mhba->ob_cur_slot = (mhba->list_num_io - 1) | CL_POINTER_TOGGLE;
mhba->fw_state = FW_STATE_STARTED;
break;
default:
dev_err(&mhba->pdev->dev, "unknown handshake state [0x%x].\n",
hs_state);
return -1;
}
return 0;
}
static unsigned char mvumi_handshake_event(struct mvumi_hba *mhba)
{
unsigned int isr_status;
unsigned long before;
before = jiffies;
mvumi_handshake(mhba);
do {
isr_status = mhba->instancet->read_fw_status_reg(mhba->mmio);
if (mhba->fw_state == FW_STATE_STARTED)
return 0;
if (time_after(jiffies, before + FW_MAX_DELAY * HZ)) {
dev_err(&mhba->pdev->dev,
"no handshake response at state 0x%x.\n",
mhba->fw_state);
dev_err(&mhba->pdev->dev,
"isr : global=0x%x,status=0x%x.\n",
mhba->global_isr, isr_status);
return -1;
}
rmb();
usleep_range(1000, 2000);
} while (!(isr_status & DRBL_HANDSHAKE_ISR));
return 0;
}
static unsigned char mvumi_check_handshake(struct mvumi_hba *mhba)
{
void *regs = mhba->mmio;
unsigned int tmp;
unsigned long before;
before = jiffies;
tmp = ioread32(regs + CPU_ARM_TO_PCIEA_MSG1);
while ((tmp != HANDSHAKE_READYSTATE) && (tmp != HANDSHAKE_DONESTATE)) {
if (tmp != HANDSHAKE_READYSTATE)
iowrite32(DRBL_MU_RESET,
regs + CPU_PCIEA_TO_ARM_DRBL_REG);
if (time_after(jiffies, before + FW_MAX_DELAY * HZ)) {
dev_err(&mhba->pdev->dev,
"invalid signature [0x%x].\n", tmp);
return -1;
}
usleep_range(1000, 2000);
rmb();
tmp = ioread32(regs + CPU_ARM_TO_PCIEA_MSG1);
}
mhba->fw_state = FW_STATE_STARTING;
dev_dbg(&mhba->pdev->dev, "start firmware handshake...\n");
do {
if (mvumi_handshake_event(mhba)) {
dev_err(&mhba->pdev->dev,
"handshake failed at state 0x%x.\n",
mhba->fw_state);
return -1;
}
} while (mhba->fw_state != FW_STATE_STARTED);
dev_dbg(&mhba->pdev->dev, "firmware handshake done\n");
return 0;
}
static unsigned char mvumi_start(struct mvumi_hba *mhba)
{
void *regs = mhba->mmio;
unsigned int tmp;
/* clear Door bell */
tmp = ioread32(regs + CPU_ARM_TO_PCIEA_DRBL_REG);
iowrite32(tmp, regs + CPU_ARM_TO_PCIEA_DRBL_REG);
iowrite32(0x3FFFFFFF, regs + CPU_ARM_TO_PCIEA_MASK_REG);
tmp = ioread32(regs + CPU_ENPOINTA_MASK_REG) | INT_MAP_DL_CPU2PCIEA;
iowrite32(tmp, regs + CPU_ENPOINTA_MASK_REG);
if (mvumi_check_handshake(mhba))
return -1;
return 0;
}
/**
* mvumi_complete_cmd - Completes a command
* @mhba: Adapter soft state
* @cmd: Command to be completed
*/
static void mvumi_complete_cmd(struct mvumi_hba *mhba, struct mvumi_cmd *cmd,
struct mvumi_rsp_frame *ob_frame)
{
struct scsi_cmnd *scmd = cmd->scmd;
cmd->scmd->SCp.ptr = NULL;
scmd->result = ob_frame->req_status;
switch (ob_frame->req_status) {
case SAM_STAT_GOOD:
scmd->result |= DID_OK << 16;
break;
case SAM_STAT_BUSY:
scmd->result |= DID_BUS_BUSY << 16;
break;
case SAM_STAT_CHECK_CONDITION:
scmd->result |= (DID_OK << 16);
if (ob_frame->rsp_flag & CL_RSP_FLAG_SENSEDATA) {
memcpy(cmd->scmd->sense_buffer, ob_frame->payload,
sizeof(struct mvumi_sense_data));
scmd->result |= (DRIVER_SENSE << 24);
}
break;
default:
scmd->result |= (DRIVER_INVALID << 24) | (DID_ABORT << 16);
break;
}
if (scsi_bufflen(scmd)) {
if (scsi_sg_count(scmd)) {
pci_unmap_sg(mhba->pdev,
scsi_sglist(scmd),
scsi_sg_count(scmd),
(int) scmd->sc_data_direction);
} else {
pci_unmap_single(mhba->pdev,
scmd->SCp.dma_handle,
scsi_bufflen(scmd),
(int) scmd->sc_data_direction);
scmd->SCp.dma_handle = 0;
}
}
cmd->scmd->scsi_done(scmd);
mvumi_return_cmd(mhba, cmd);
}
static void mvumi_complete_internal_cmd(struct mvumi_hba *mhba,
struct mvumi_cmd *cmd,
struct mvumi_rsp_frame *ob_frame)
{
if (atomic_read(&cmd->sync_cmd)) {
cmd->cmd_status = ob_frame->req_status;
if ((ob_frame->req_status == SAM_STAT_CHECK_CONDITION) &&
(ob_frame->rsp_flag & CL_RSP_FLAG_SENSEDATA) &&
cmd->data_buf) {
memcpy(cmd->data_buf, ob_frame->payload,
sizeof(struct mvumi_sense_data));
}
atomic_dec(&cmd->sync_cmd);
wake_up(&mhba->int_cmd_wait_q);
}
}
static void mvumi_show_event(struct mvumi_hba *mhba,
struct mvumi_driver_event *ptr)
{
unsigned int i;
dev_warn(&mhba->pdev->dev,
"Event[0x%x] id[0x%x] severity[0x%x] device id[0x%x]\n",
ptr->sequence_no, ptr->event_id, ptr->severity, ptr->device_id);
if (ptr->param_count) {
printk(KERN_WARNING "Event param(len 0x%x): ",
ptr->param_count);
for (i = 0; i < ptr->param_count; i++)
printk(KERN_WARNING "0x%x ", ptr->params[i]);
printk(KERN_WARNING "\n");
}
if (ptr->sense_data_length) {
printk(KERN_WARNING "Event sense data(len 0x%x): ",
ptr->sense_data_length);
for (i = 0; i < ptr->sense_data_length; i++)
printk(KERN_WARNING "0x%x ", ptr->sense_data[i]);
printk(KERN_WARNING "\n");
}
}
static void mvumi_notification(struct mvumi_hba *mhba, u8 msg, void *buffer)
{
if (msg == APICDB1_EVENT_GETEVENT) {
int i, count;
struct mvumi_driver_event *param = NULL;
struct mvumi_event_req *er = buffer;
count = er->count;
if (count > MAX_EVENTS_RETURNED) {
dev_err(&mhba->pdev->dev, "event count[0x%x] is bigger"
" than max event count[0x%x].\n",
count, MAX_EVENTS_RETURNED);
return;
}
for (i = 0; i < count; i++) {
param = &er->events[i];
mvumi_show_event(mhba, param);
}
}
}
static int mvumi_get_event(struct mvumi_hba *mhba, unsigned char msg)
{
struct mvumi_cmd *cmd;
struct mvumi_msg_frame *frame;
cmd = mvumi_create_internal_cmd(mhba, 512);
if (!cmd)
return -1;
cmd->scmd = NULL;
cmd->cmd_status = REQ_STATUS_PENDING;
atomic_set(&cmd->sync_cmd, 0);
frame = cmd->frame;
frame->device_id = 0;
frame->cmd_flag = CMD_FLAG_DATA_IN;
frame->req_function = CL_FUN_SCSI_CMD;
frame->cdb_length = MAX_COMMAND_SIZE;
frame->data_transfer_length = sizeof(struct mvumi_event_req);
memset(frame->cdb, 0, MAX_COMMAND_SIZE);
frame->cdb[0] = APICDB0_EVENT;
frame->cdb[1] = msg;
mvumi_issue_blocked_cmd(mhba, cmd);
if (cmd->cmd_status != SAM_STAT_GOOD)
dev_err(&mhba->pdev->dev, "get event failed, status=0x%x.\n",
cmd->cmd_status);
else
mvumi_notification(mhba, cmd->frame->cdb[1], cmd->data_buf);
mvumi_delete_internal_cmd(mhba, cmd);
return 0;
}
static void mvumi_scan_events(struct work_struct *work)
{
struct mvumi_events_wq *mu_ev =
container_of(work, struct mvumi_events_wq, work_q);
mvumi_get_event(mu_ev->mhba, mu_ev->event);
kfree(mu_ev);
}
static void mvumi_launch_events(struct mvumi_hba *mhba, u8 msg)
{
struct mvumi_events_wq *mu_ev;
mu_ev = kzalloc(sizeof(*mu_ev), GFP_ATOMIC);
if (mu_ev) {
INIT_WORK(&mu_ev->work_q, mvumi_scan_events);
mu_ev->mhba = mhba;
mu_ev->event = msg;
mu_ev->param = NULL;
schedule_work(&mu_ev->work_q);
}
}
static void mvumi_handle_clob(struct mvumi_hba *mhba)
{
struct mvumi_rsp_frame *ob_frame;
struct mvumi_cmd *cmd;
struct mvumi_ob_data *pool;
while (!list_empty(&mhba->free_ob_list)) {
pool = list_first_entry(&mhba->free_ob_list,
struct mvumi_ob_data, list);
list_del_init(&pool->list);
list_add_tail(&pool->list, &mhba->ob_data_list);
ob_frame = (struct mvumi_rsp_frame *) &pool->data[0];
cmd = mhba->tag_cmd[ob_frame->tag];
atomic_dec(&mhba->fw_outstanding);
mhba->tag_cmd[ob_frame->tag] = 0;
tag_release_one(mhba, &mhba->tag_pool, ob_frame->tag);
if (cmd->scmd)
mvumi_complete_cmd(mhba, cmd, ob_frame);
else
mvumi_complete_internal_cmd(mhba, cmd, ob_frame);
}
mhba->instancet->fire_cmd(mhba, NULL);
}
static irqreturn_t mvumi_isr_handler(int irq, void *devp)
{
struct mvumi_hba *mhba = (struct mvumi_hba *) devp;
unsigned long flags;
spin_lock_irqsave(mhba->shost->host_lock, flags);
if (unlikely(mhba->instancet->clear_intr(mhba) || !mhba->global_isr)) {
spin_unlock_irqrestore(mhba->shost->host_lock, flags);
return IRQ_NONE;
}
if (mhba->global_isr & INT_MAP_DL_CPU2PCIEA) {
if (mhba->isr_status & DRBL_HANDSHAKE_ISR) {
dev_warn(&mhba->pdev->dev, "enter handshake again!\n");
mvumi_handshake(mhba);
}
if (mhba->isr_status & DRBL_EVENT_NOTIFY)
mvumi_launch_events(mhba, APICDB1_EVENT_GETEVENT);
}
if (mhba->global_isr & INT_MAP_COMAOUT)
mvumi_receive_ob_list_entry(mhba);
mhba->global_isr = 0;
mhba->isr_status = 0;
if (mhba->fw_state == FW_STATE_STARTED)
mvumi_handle_clob(mhba);
spin_unlock_irqrestore(mhba->shost->host_lock, flags);
return IRQ_HANDLED;
}
static enum mvumi_qc_result mvumi_send_command(struct mvumi_hba *mhba,
struct mvumi_cmd *cmd)
{
void *ib_entry;
struct mvumi_msg_frame *ib_frame;
unsigned int frame_len;
ib_frame = cmd->frame;
if (unlikely(mhba->fw_state != FW_STATE_STARTED)) {
dev_dbg(&mhba->pdev->dev, "firmware not ready.\n");
return MV_QUEUE_COMMAND_RESULT_NO_RESOURCE;
}
if (tag_is_empty(&mhba->tag_pool)) {
dev_dbg(&mhba->pdev->dev, "no free tag.\n");
return MV_QUEUE_COMMAND_RESULT_NO_RESOURCE;
}
if (mvumi_get_ib_list_entry(mhba, &ib_entry))
return MV_QUEUE_COMMAND_RESULT_NO_RESOURCE;
cmd->frame->tag = tag_get_one(mhba, &mhba->tag_pool);
cmd->frame->request_id = mhba->io_seq++;
cmd->request_id = cmd->frame->request_id;
mhba->tag_cmd[cmd->frame->tag] = cmd;
frame_len = sizeof(*ib_frame) - 4 +
ib_frame->sg_counts * sizeof(struct mvumi_sgl);
memcpy(ib_entry, ib_frame, frame_len);
return MV_QUEUE_COMMAND_RESULT_SENT;
}
static void mvumi_fire_cmd(struct mvumi_hba *mhba, struct mvumi_cmd *cmd)
{
unsigned short num_of_cl_sent = 0;
enum mvumi_qc_result result;
if (cmd)
list_add_tail(&cmd->queue_pointer, &mhba->waiting_req_list);
while (!list_empty(&mhba->waiting_req_list)) {
cmd = list_first_entry(&mhba->waiting_req_list,
struct mvumi_cmd, queue_pointer);
list_del_init(&cmd->queue_pointer);
result = mvumi_send_command(mhba, cmd);
switch (result) {
case MV_QUEUE_COMMAND_RESULT_SENT:
num_of_cl_sent++;
break;
case MV_QUEUE_COMMAND_RESULT_NO_RESOURCE:
list_add(&cmd->queue_pointer, &mhba->waiting_req_list);
if (num_of_cl_sent > 0)
mvumi_send_ib_list_entry(mhba);
return;
}
}
if (num_of_cl_sent > 0)
mvumi_send_ib_list_entry(mhba);
}
/**
* mvumi_enable_intr - Enables interrupts
* @regs: FW register set
*/
static void mvumi_enable_intr(void *regs)
{
unsigned int mask;
iowrite32(0x3FFFFFFF, regs + CPU_ARM_TO_PCIEA_MASK_REG);
mask = ioread32(regs + CPU_ENPOINTA_MASK_REG);
mask |= INT_MAP_DL_CPU2PCIEA | INT_MAP_COMAOUT | INT_MAP_COMAERR;
iowrite32(mask, regs + CPU_ENPOINTA_MASK_REG);
}
/**
* mvumi_disable_intr -Disables interrupt
* @regs: FW register set
*/
static void mvumi_disable_intr(void *regs)
{
unsigned int mask;
iowrite32(0, regs + CPU_ARM_TO_PCIEA_MASK_REG);
mask = ioread32(regs + CPU_ENPOINTA_MASK_REG);
mask &= ~(INT_MAP_DL_CPU2PCIEA | INT_MAP_COMAOUT | INT_MAP_COMAERR);
iowrite32(mask, regs + CPU_ENPOINTA_MASK_REG);
}
static int mvumi_clear_intr(void *extend)
{
struct mvumi_hba *mhba = (struct mvumi_hba *) extend;
unsigned int status, isr_status = 0, tmp = 0;
void *regs = mhba->mmio;
status = ioread32(regs + CPU_MAIN_INT_CAUSE_REG);
if (!(status & INT_MAP_MU) || status == 0xFFFFFFFF)
return 1;
if (unlikely(status & INT_MAP_COMAERR)) {
tmp = ioread32(regs + CLA_ISR_CAUSE);
if (tmp & (CLIC_IN_ERR_IRQ | CLIC_OUT_ERR_IRQ))
iowrite32(tmp & (CLIC_IN_ERR_IRQ | CLIC_OUT_ERR_IRQ),
regs + CLA_ISR_CAUSE);
status ^= INT_MAP_COMAERR;
/* inbound or outbound parity error, command will timeout */
}
if (status & INT_MAP_COMAOUT) {
tmp = ioread32(regs + CLA_ISR_CAUSE);
if (tmp & CLIC_OUT_IRQ)
iowrite32(tmp & CLIC_OUT_IRQ, regs + CLA_ISR_CAUSE);
}
if (status & INT_MAP_DL_CPU2PCIEA) {
isr_status = ioread32(regs + CPU_ARM_TO_PCIEA_DRBL_REG);
if (isr_status)
iowrite32(isr_status, regs + CPU_ARM_TO_PCIEA_DRBL_REG);
}
mhba->global_isr = status;
mhba->isr_status = isr_status;
return 0;
}
/**
* mvumi_read_fw_status_reg - returns the current FW status value
* @regs: FW register set
*/
static unsigned int mvumi_read_fw_status_reg(void *regs)
{
unsigned int status;
status = ioread32(regs + CPU_ARM_TO_PCIEA_DRBL_REG);
if (status)
iowrite32(status, regs + CPU_ARM_TO_PCIEA_DRBL_REG);
return status;
}
static struct mvumi_instance_template mvumi_instance_template = {
.fire_cmd = mvumi_fire_cmd,
.enable_intr = mvumi_enable_intr,
.disable_intr = mvumi_disable_intr,
.clear_intr = mvumi_clear_intr,
.read_fw_status_reg = mvumi_read_fw_status_reg,
};
static int mvumi_slave_configure(struct scsi_device *sdev)
{
struct mvumi_hba *mhba;
unsigned char bitcount = sizeof(unsigned char) * 8;
mhba = (struct mvumi_hba *) sdev->host->hostdata;
if (sdev->id >= mhba->max_target_id)
return -EINVAL;
mhba->target_map[sdev->id / bitcount] |= (1 << (sdev->id % bitcount));
return 0;
}
/**
* mvumi_build_frame - Prepares a direct cdb (DCDB) command
* @mhba: Adapter soft state
* @scmd: SCSI command
* @cmd: Command to be prepared in
*
* This function prepares CDB commands. These are typcially pass-through
* commands to the devices.
*/
static unsigned char mvumi_build_frame(struct mvumi_hba *mhba,
struct scsi_cmnd *scmd, struct mvumi_cmd *cmd)
{
struct mvumi_msg_frame *pframe;
cmd->scmd = scmd;
cmd->cmd_status = REQ_STATUS_PENDING;
pframe = cmd->frame;
pframe->device_id = ((unsigned short) scmd->device->id) |
(((unsigned short) scmd->device->lun) << 8);
pframe->cmd_flag = 0;
switch (scmd->sc_data_direction) {
case DMA_NONE:
pframe->cmd_flag |= CMD_FLAG_NON_DATA;
break;
case DMA_FROM_DEVICE:
pframe->cmd_flag |= CMD_FLAG_DATA_IN;
break;
case DMA_TO_DEVICE:
pframe->cmd_flag |= CMD_FLAG_DATA_OUT;
break;
case DMA_BIDIRECTIONAL:
default:
dev_warn(&mhba->pdev->dev, "unexpected data direction[%d] "
"cmd[0x%x]\n", scmd->sc_data_direction, scmd->cmnd[0]);
goto error;
}
pframe->cdb_length = scmd->cmd_len;
memcpy(pframe->cdb, scmd->cmnd, pframe->cdb_length);
pframe->req_function = CL_FUN_SCSI_CMD;
if (scsi_bufflen(scmd)) {
if (mvumi_make_sgl(mhba, scmd, &pframe->payload[0],
&pframe->sg_counts))
goto error;
pframe->data_transfer_length = scsi_bufflen(scmd);
} else {
pframe->sg_counts = 0;
pframe->data_transfer_length = 0;
}
return 0;
error:
scmd->result = (DID_OK << 16) | (DRIVER_SENSE << 24) |
SAM_STAT_CHECK_CONDITION;
scsi_build_sense_buffer(0, scmd->sense_buffer, ILLEGAL_REQUEST, 0x24,
0);
return -1;
}
/**
* mvumi_queue_command - Queue entry point
* @scmd: SCSI command to be queued
* @done: Callback entry point
*/
static int mvumi_queue_command(struct Scsi_Host *shost,
struct scsi_cmnd *scmd)
{
struct mvumi_cmd *cmd;
struct mvumi_hba *mhba;
unsigned long irq_flags;
spin_lock_irqsave(shost->host_lock, irq_flags);
scsi_cmd_get_serial(shost, scmd);
mhba = (struct mvumi_hba *) shost->hostdata;
scmd->result = 0;
cmd = mvumi_get_cmd(mhba);
if (unlikely(!cmd)) {
spin_unlock_irqrestore(shost->host_lock, irq_flags);
return SCSI_MLQUEUE_HOST_BUSY;
}
if (unlikely(mvumi_build_frame(mhba, scmd, cmd)))
goto out_return_cmd;
cmd->scmd = scmd;
scmd->SCp.ptr = (char *) cmd;
mhba->instancet->fire_cmd(mhba, cmd);
spin_unlock_irqrestore(shost->host_lock, irq_flags);
return 0;
out_return_cmd:
mvumi_return_cmd(mhba, cmd);
scmd->scsi_done(scmd);
spin_unlock_irqrestore(shost->host_lock, irq_flags);
return 0;
}
static enum blk_eh_timer_return mvumi_timed_out(struct scsi_cmnd *scmd)
{
struct mvumi_cmd *cmd = (struct mvumi_cmd *) scmd->SCp.ptr;
struct Scsi_Host *host = scmd->device->host;
struct mvumi_hba *mhba = shost_priv(host);
unsigned long flags;
spin_lock_irqsave(mhba->shost->host_lock, flags);
if (mhba->tag_cmd[cmd->frame->tag]) {
mhba->tag_cmd[cmd->frame->tag] = 0;
tag_release_one(mhba, &mhba->tag_pool, cmd->frame->tag);
}
if (!list_empty(&cmd->queue_pointer))
list_del_init(&cmd->queue_pointer);
else
atomic_dec(&mhba->fw_outstanding);
scmd->result = (DRIVER_INVALID << 24) | (DID_ABORT << 16);
scmd->SCp.ptr = NULL;
if (scsi_bufflen(scmd)) {
if (scsi_sg_count(scmd)) {
pci_unmap_sg(mhba->pdev,
scsi_sglist(scmd),
scsi_sg_count(scmd),
(int)scmd->sc_data_direction);
} else {
pci_unmap_single(mhba->pdev,
scmd->SCp.dma_handle,
scsi_bufflen(scmd),
(int)scmd->sc_data_direction);
scmd->SCp.dma_handle = 0;
}
}
mvumi_return_cmd(mhba, cmd);
spin_unlock_irqrestore(mhba->shost->host_lock, flags);
return BLK_EH_NOT_HANDLED;
}
static int
mvumi_bios_param(struct scsi_device *sdev, struct block_device *bdev,
sector_t capacity, int geom[])
{
int heads, sectors;
sector_t cylinders;
unsigned long tmp;
heads = 64;
sectors = 32;
tmp = heads * sectors;
cylinders = capacity;
sector_div(cylinders, tmp);
if (capacity >= 0x200000) {
heads = 255;
sectors = 63;
tmp = heads * sectors;
cylinders = capacity;
sector_div(cylinders, tmp);
}
geom[0] = heads;
geom[1] = sectors;
geom[2] = cylinders;
return 0;
}
static struct scsi_host_template mvumi_template = {
.module = THIS_MODULE,
.name = "Marvell Storage Controller",
.slave_configure = mvumi_slave_configure,
.queuecommand = mvumi_queue_command,
.eh_host_reset_handler = mvumi_host_reset,
.bios_param = mvumi_bios_param,
.this_id = -1,
};
static struct scsi_transport_template mvumi_transport_template = {
.eh_timed_out = mvumi_timed_out,
};
/**
* mvumi_init_fw - Initializes the FW
* @mhba: Adapter soft state
*
* This is the main function for initializing firmware.
*/
static int mvumi_init_fw(struct mvumi_hba *mhba)
{
int ret = 0;
if (pci_request_regions(mhba->pdev, MV_DRIVER_NAME)) {
dev_err(&mhba->pdev->dev, "IO memory region busy!\n");
return -EBUSY;
}
ret = mvumi_map_pci_addr(mhba->pdev, mhba->base_addr);
if (ret)
goto fail_ioremap;
mhba->mmio = mhba->base_addr[0];
switch (mhba->pdev->device) {
case PCI_DEVICE_ID_MARVELL_MV9143:
mhba->instancet = &mvumi_instance_template;
mhba->io_seq = 0;
mhba->max_sge = MVUMI_MAX_SG_ENTRY;
mhba->request_id_enabled = 1;
break;
default:
dev_err(&mhba->pdev->dev, "device 0x%x not supported!\n",
mhba->pdev->device);
mhba->instancet = NULL;
ret = -EINVAL;
goto fail_alloc_mem;
}
dev_dbg(&mhba->pdev->dev, "device id : %04X is found.\n",
mhba->pdev->device);
mhba->handshake_page = kzalloc(HSP_MAX_SIZE, GFP_KERNEL);
if (!mhba->handshake_page) {
dev_err(&mhba->pdev->dev,
"failed to allocate memory for handshake\n");
ret = -ENOMEM;
goto fail_alloc_mem;
}
mhba->handshake_page_phys = virt_to_phys(mhba->handshake_page);
if (mvumi_start(mhba)) {
ret = -EINVAL;
goto fail_ready_state;
}
ret = mvumi_alloc_cmds(mhba);
if (ret)
goto fail_ready_state;
return 0;
fail_ready_state:
mvumi_release_mem_resource(mhba);
kfree(mhba->handshake_page);
fail_alloc_mem:
mvumi_unmap_pci_addr(mhba->pdev, mhba->base_addr);
fail_ioremap:
pci_release_regions(mhba->pdev);
return ret;
}
/**
* mvumi_io_attach - Attaches this driver to SCSI mid-layer
* @mhba: Adapter soft state
*/
static int mvumi_io_attach(struct mvumi_hba *mhba)
{
struct Scsi_Host *host = mhba->shost;
int ret;
unsigned int max_sg = (mhba->ib_max_size + 4 -
sizeof(struct mvumi_msg_frame)) / sizeof(struct mvumi_sgl);
host->irq = mhba->pdev->irq;
host->unique_id = mhba->unique_id;
host->can_queue = (mhba->max_io - 1) ? (mhba->max_io - 1) : 1;
host->sg_tablesize = mhba->max_sge > max_sg ? max_sg : mhba->max_sge;
host->max_sectors = mhba->max_transfer_size / 512;
host->cmd_per_lun = (mhba->max_io - 1) ? (mhba->max_io - 1) : 1;
host->max_id = mhba->max_target_id;
host->max_cmd_len = MAX_COMMAND_SIZE;
host->transportt = &mvumi_transport_template;
ret = scsi_add_host(host, &mhba->pdev->dev);
if (ret) {
dev_err(&mhba->pdev->dev, "scsi_add_host failed\n");
return ret;
}
mhba->fw_flag |= MVUMI_FW_ATTACH;
scsi_scan_host(host);
return 0;
}
/**
* mvumi_probe_one - PCI hotplug entry point
* @pdev: PCI device structure
* @id: PCI ids of supported hotplugged adapter
*/
static int __devinit mvumi_probe_one(struct pci_dev *pdev,
const struct pci_device_id *id)
{
struct Scsi_Host *host;
struct mvumi_hba *mhba;
int ret;
dev_dbg(&pdev->dev, " %#4.04x:%#4.04x:%#4.04x:%#4.04x: ",
pdev->vendor, pdev->device, pdev->subsystem_vendor,
pdev->subsystem_device);
ret = pci_enable_device(pdev);
if (ret)
return ret;
pci_set_master(pdev);
if (IS_DMA64) {
ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
if (ret) {
ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
if (ret)
goto fail_set_dma_mask;
}
} else {
ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
if (ret)
goto fail_set_dma_mask;
}
host = scsi_host_alloc(&mvumi_template, sizeof(*mhba));
if (!host) {
dev_err(&pdev->dev, "scsi_host_alloc failed\n");
ret = -ENOMEM;
goto fail_alloc_instance;
}
mhba = shost_priv(host);
INIT_LIST_HEAD(&mhba->cmd_pool);
INIT_LIST_HEAD(&mhba->ob_data_list);
INIT_LIST_HEAD(&mhba->free_ob_list);
INIT_LIST_HEAD(&mhba->res_list);
INIT_LIST_HEAD(&mhba->waiting_req_list);
atomic_set(&mhba->fw_outstanding, 0);
init_waitqueue_head(&mhba->int_cmd_wait_q);
mhba->pdev = pdev;
mhba->shost = host;
mhba->unique_id = pdev->bus->number << 8 | pdev->devfn;
ret = mvumi_init_fw(mhba);
if (ret)
goto fail_init_fw;
ret = request_irq(mhba->pdev->irq, mvumi_isr_handler, IRQF_SHARED,
"mvumi", mhba);
if (ret) {
dev_err(&pdev->dev, "failed to register IRQ\n");
goto fail_init_irq;
}
mhba->instancet->enable_intr(mhba->mmio);
pci_set_drvdata(pdev, mhba);
ret = mvumi_io_attach(mhba);
if (ret)
goto fail_io_attach;
dev_dbg(&pdev->dev, "probe mvumi driver successfully.\n");
return 0;
fail_io_attach:
pci_set_drvdata(pdev, NULL);
mhba->instancet->disable_intr(mhba->mmio);
free_irq(mhba->pdev->irq, mhba);
fail_init_irq:
mvumi_release_fw(mhba);
fail_init_fw:
scsi_host_put(host);
fail_alloc_instance:
fail_set_dma_mask:
pci_disable_device(pdev);
return ret;
}
static void mvumi_detach_one(struct pci_dev *pdev)
{
struct Scsi_Host *host;
struct mvumi_hba *mhba;
mhba = pci_get_drvdata(pdev);
host = mhba->shost;
scsi_remove_host(mhba->shost);
mvumi_flush_cache(mhba);
mhba->instancet->disable_intr(mhba->mmio);
free_irq(mhba->pdev->irq, mhba);
mvumi_release_fw(mhba);
scsi_host_put(host);
pci_set_drvdata(pdev, NULL);
pci_disable_device(pdev);
dev_dbg(&pdev->dev, "driver is removed!\n");
}
/**
* mvumi_shutdown - Shutdown entry point
* @device: Generic device structure
*/
static void mvumi_shutdown(struct pci_dev *pdev)
{
struct mvumi_hba *mhba = pci_get_drvdata(pdev);
mvumi_flush_cache(mhba);
}
static int mvumi_suspend(struct pci_dev *pdev, pm_message_t state)
{
struct mvumi_hba *mhba = NULL;
mhba = pci_get_drvdata(pdev);
mvumi_flush_cache(mhba);
pci_set_drvdata(pdev, mhba);
mhba->instancet->disable_intr(mhba->mmio);
free_irq(mhba->pdev->irq, mhba);
mvumi_unmap_pci_addr(pdev, mhba->base_addr);
pci_release_regions(pdev);
pci_save_state(pdev);
pci_disable_device(pdev);
pci_set_power_state(pdev, pci_choose_state(pdev, state));
return 0;
}
static int mvumi_resume(struct pci_dev *pdev)
{
int ret;
struct mvumi_hba *mhba = NULL;
mhba = pci_get_drvdata(pdev);
pci_set_power_state(pdev, PCI_D0);
pci_enable_wake(pdev, PCI_D0, 0);
pci_restore_state(pdev);
ret = pci_enable_device(pdev);
if (ret) {
dev_err(&pdev->dev, "enable device failed\n");
return ret;
}
pci_set_master(pdev);
if (IS_DMA64) {
ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
if (ret) {
ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
if (ret)
goto fail;
}
} else {
ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
if (ret)
goto fail;
}
ret = pci_request_regions(mhba->pdev, MV_DRIVER_NAME);
if (ret)
goto fail;
ret = mvumi_map_pci_addr(mhba->pdev, mhba->base_addr);
if (ret)
goto release_regions;
mhba->mmio = mhba->base_addr[0];
mvumi_reset(mhba->mmio);
if (mvumi_start(mhba)) {
ret = -EINVAL;
goto unmap_pci_addr;
}
ret = request_irq(mhba->pdev->irq, mvumi_isr_handler, IRQF_SHARED,
"mvumi", mhba);
if (ret) {
dev_err(&pdev->dev, "failed to register IRQ\n");
goto unmap_pci_addr;
}
mhba->instancet->enable_intr(mhba->mmio);
return 0;
unmap_pci_addr:
mvumi_unmap_pci_addr(pdev, mhba->base_addr);
release_regions:
pci_release_regions(pdev);
fail:
pci_disable_device(pdev);
return ret;
}
static struct pci_driver mvumi_pci_driver = {
.name = MV_DRIVER_NAME,
.id_table = mvumi_pci_table,
.probe = mvumi_probe_one,
.remove = __devexit_p(mvumi_detach_one),
.shutdown = mvumi_shutdown,
#ifdef CONFIG_PM
.suspend = mvumi_suspend,
.resume = mvumi_resume,
#endif
};
/**
* mvumi_init - Driver load entry point
*/
static int __init mvumi_init(void)
{
return pci_register_driver(&mvumi_pci_driver);
}
/**
* mvumi_exit - Driver unload entry point
*/
static void __exit mvumi_exit(void)
{
pci_unregister_driver(&mvumi_pci_driver);
}
module_init(mvumi_init);
module_exit(mvumi_exit);
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