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linux/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/ktime.h>
#include <linux/blkdev.h>
#include <linux/io.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_transport.h>
#include <scsi/scsi_eh.h>
#include <linux/uaccess.h>
#include <linux/kthread.h>
#include "mvumi.h"
MODULE_LICENSE("GPL");
MODULE_AUTHOR("jyli@marvell.com");
MODULE_DESCRIPTION("Marvell UMI Driver");
static const struct pci_device_id mvumi_pci_table[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL_EXT, PCI_DEVICE_ID_MARVELL_MV9143) },
{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL_EXT, PCI_DEVICE_ID_MARVELL_MV9580) },
{ 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_ATOMIC);
if (!res) {
dev_err(&mhba->pdev->dev,
"Failed to allocate memory for resource manager.\n");
return NULL;
}
switch (type) {
case RESOURCE_CACHED_MEMORY:
res->virt_addr = kzalloc(size, GFP_ATOMIC);
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 = dma_zalloc_coherent(&mhba->pdev->dev, size,
&res->bus_addr, GFP_KERNEL);
if (!res->virt_addr) {
dev_err(&mhba->pdev->dev,
"unable to allocate consistent mem,"
"size = %d.\n", size);
kfree(res);
return NULL;
}
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:
dma_free_coherent(&mhba->pdev->dev, 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;
sg = scsi_sglist(scmd);
*sg_count = dma_map_sg(&mhba->pdev->dev, sg, sgnum,
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);
dma_unmap_sg(&mhba->pdev->dev, sg, sgnum,
scmd->sc_data_direction);
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;
sgd_setsz(mhba, m_sg, cpu_to_le32(sg_dma_len(&sg[i])));
if ((i + 1) == *sg_count)
m_sg->flags |= 1U << mhba->eot_flag;
sgd_inc(mhba, m_sg);
}
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 = dma_zalloc_coherent(&mhba->pdev->dev, size, &phy_addr,
GFP_KERNEL);
if (!virt_addr)
return -1;
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 = 1U << mhba->eot_flag;
sgd_setsz(mhba, m_sg, 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 = dma_alloc_coherent(&mhba->pdev->dev, mhba->ib_max_size,
&cmd->frame_phys, 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");
dma_free_coherent(&mhba->pdev->dev, mhba->ib_max_size,
cmd->frame, cmd->frame_phys);
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];
sgd_getsz(mhba, m_sg, size);
phy_addr = (dma_addr_t) m_sg->baseaddr_l |
(dma_addr_t) ((m_sg->baseaddr_h << 16) << 16);
dma_free_coherent(&mhba->pdev->dev, size, cmd->data_buf,
phy_addr);
}
dma_free_coherent(&mhba->pdev->dev, mhba->ib_max_size,
cmd->frame, cmd->frame_phys);
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);
if (!(mhba->hba_capability & HS_CAPABILITY_SUPPORT_DYN_SRC))
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);
if (mhba->hba_capability & HS_CAPABILITY_SUPPORT_DYN_SRC) {
cmd->frame = mhba->ib_frame + i * mhba->ib_max_size;
cmd->frame_phys = mhba->ib_frame_phys
+ i * mhba->ib_max_size;
} else
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);
if (!(mhba->hba_capability & HS_CAPABILITY_SUPPORT_DYN_SRC))
kfree(cmd->frame);
kfree(cmd);
}
return -ENOMEM;
}
static unsigned int mvumi_check_ib_list_9143(struct mvumi_hba *mhba)
{
unsigned int ib_rp_reg;
struct mvumi_hw_regs *regs = mhba->regs;
ib_rp_reg = ioread32(mhba->regs->inb_read_pointer);
if (unlikely(((ib_rp_reg & regs->cl_slot_num_mask) ==
(mhba->ib_cur_slot & regs->cl_slot_num_mask)) &&
((ib_rp_reg & regs->cl_pointer_toggle)
!= (mhba->ib_cur_slot & regs->cl_pointer_toggle)))) {
dev_warn(&mhba->pdev->dev, "no free slot to use.\n");
return 0;
}
if (atomic_read(&mhba->fw_outstanding) >= mhba->max_io) {
dev_warn(&mhba->pdev->dev, "firmware io overflow.\n");
return 0;
} else {
return mhba->max_io - atomic_read(&mhba->fw_outstanding);
}
}
static unsigned int mvumi_check_ib_list_9580(struct mvumi_hba *mhba)
{
unsigned int count;
if (atomic_read(&mhba->fw_outstanding) >= (mhba->max_io - 1))
return 0;
count = ioread32(mhba->ib_shadow);
if (count == 0xffff)
return 0;
return count;
}
static void mvumi_get_ib_list_entry(struct mvumi_hba *mhba, void **ib_entry)
{
unsigned int cur_ib_entry;
cur_ib_entry = mhba->ib_cur_slot & mhba->regs->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 ^= mhba->regs->cl_pointer_toggle;
}
mhba->ib_cur_slot &= ~mhba->regs->cl_slot_num_mask;
mhba->ib_cur_slot |= (cur_ib_entry & mhba->regs->cl_slot_num_mask);
if (mhba->hba_capability & HS_CAPABILITY_SUPPORT_DYN_SRC) {
*ib_entry = mhba->ib_list + cur_ib_entry *
sizeof(struct mvumi_dyn_list_entry);
} else {
*ib_entry = mhba->ib_list + cur_ib_entry * mhba->ib_max_size;
}
atomic_inc(&mhba->fw_outstanding);
}
static void mvumi_send_ib_list_entry(struct mvumi_hba *mhba)
{
iowrite32(0xffff, mhba->ib_shadow);
iowrite32(mhba->ib_cur_slot, mhba->regs->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 int mvumi_check_ob_list_9143(struct mvumi_hba *mhba,
unsigned int *cur_obf, unsigned int *assign_obf_end)
{
unsigned int ob_write, ob_write_shadow;
struct mvumi_hw_regs *regs = mhba->regs;
do {
ob_write = ioread32(regs->outb_copy_pointer);
ob_write_shadow = ioread32(mhba->ob_shadow);
} while ((ob_write & regs->cl_slot_num_mask) != ob_write_shadow);
*cur_obf = mhba->ob_cur_slot & mhba->regs->cl_slot_num_mask;
*assign_obf_end = ob_write & mhba->regs->cl_slot_num_mask;
if ((ob_write & regs->cl_pointer_toggle) !=
(mhba->ob_cur_slot & regs->cl_pointer_toggle)) {
*assign_obf_end += mhba->list_num_io;
}
return 0;
}
static int mvumi_check_ob_list_9580(struct mvumi_hba *mhba,
unsigned int *cur_obf, unsigned int *assign_obf_end)
{
unsigned int ob_write;
struct mvumi_hw_regs *regs = mhba->regs;
ob_write = ioread32(regs->outb_read_pointer);
ob_write = ioread32(regs->outb_copy_pointer);
*cur_obf = mhba->ob_cur_slot & mhba->regs->cl_slot_num_mask;
*assign_obf_end = ob_write & mhba->regs->cl_slot_num_mask;
if (*assign_obf_end < *cur_obf)
*assign_obf_end += mhba->list_num_io;
else if (*assign_obf_end == *cur_obf)
return -1;
return 0;
}
static void mvumi_receive_ob_list_entry(struct mvumi_hba *mhba)
{
unsigned int cur_obf, assign_obf_end, i;
struct mvumi_ob_data *ob_data;
struct mvumi_rsp_frame *p_outb_frame;
struct mvumi_hw_regs *regs = mhba->regs;
if (mhba->instancet->check_ob_list(mhba, &cur_obf, &assign_obf_end))
return;
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 ^= regs->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 ^= regs->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 &= ~regs->cl_slot_num_mask;
mhba->ob_cur_slot |= (cur_obf & regs->cl_slot_num_mask);
iowrite32(mhba->ob_cur_slot, regs->outb_read_pointer);
}
static void mvumi_reset(struct mvumi_hba *mhba)
{
struct mvumi_hw_regs *regs = mhba->regs;
iowrite32(0, regs->enpointa_mask_reg);
if (ioread32(regs->arm_to_pciea_msg1) != HANDSHAKE_DONESTATE)
return;
iowrite32(DRBL_SOFT_RESET, regs->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);
if (mvumi_start(mhba))
return FAILED;
else
return SUCCESS;
}
static int mvumi_wait_for_fw(struct mvumi_hba *mhba)
{
struct mvumi_hw_regs *regs = mhba->regs;
u32 tmp;
unsigned long before;
before = jiffies;
iowrite32(0, regs->enpointa_mask_reg);
tmp = ioread32(regs->arm_to_pciea_msg1);
while (tmp != HANDSHAKE_READYSTATE) {
iowrite32(DRBL_MU_RESET, regs->pciea_to_arm_drbl_reg);
if (time_after(jiffies, before + FW_MAX_DELAY * HZ)) {
dev_err(&mhba->pdev->dev,
"FW reset failed [0x%x].\n", tmp);
return FAILED;
}
msleep(500);
rmb();
tmp = ioread32(regs->arm_to_pciea_msg1);
}
return SUCCESS;
}
static void mvumi_backup_bar_addr(struct mvumi_hba *mhba)
{
unsigned char i;
for (i = 0; i < MAX_BASE_ADDRESS; i++) {
pci_read_config_dword(mhba->pdev, 0x10 + i * 4,
&mhba->pci_base[i]);
}
}
static void mvumi_restore_bar_addr(struct mvumi_hba *mhba)
{
unsigned char i;
for (i = 0; i < MAX_BASE_ADDRESS; i++) {
if (mhba->pci_base[i])
pci_write_config_dword(mhba->pdev, 0x10 + i * 4,
mhba->pci_base[i]);
}
}
static int mvumi_pci_set_master(struct pci_dev *pdev)
{
int ret = 0;
pci_set_master(pdev);
if (IS_DMA64) {
if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)))
ret = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
} else
ret = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
return ret;
}
static int mvumi_reset_host_9580(struct mvumi_hba *mhba)
{
mhba->fw_state = FW_STATE_ABORT;
iowrite32(0, mhba->regs->reset_enable);
iowrite32(0xf, mhba->regs->reset_request);
iowrite32(0x10, mhba->regs->reset_enable);
iowrite32(0x10, mhba->regs->reset_request);
msleep(100);
pci_disable_device(mhba->pdev);
if (pci_enable_device(mhba->pdev)) {
dev_err(&mhba->pdev->dev, "enable device failed\n");
return FAILED;
}
if (mvumi_pci_set_master(mhba->pdev)) {
dev_err(&mhba->pdev->dev, "set master failed\n");
return FAILED;
}
mvumi_restore_bar_addr(mhba);
if (mvumi_wait_for_fw(mhba) == FAILED)
return FAILED;
return mvumi_wait_for_outstanding(mhba);
}
static int mvumi_reset_host_9143(struct mvumi_hba *mhba)
{
return mvumi_wait_for_outstanding(mhba);
}
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 mhba->instancet->reset_host(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);
dma_free_coherent(&mhba->pdev->dev, HSP_MAX_SIZE,
mhba->handshake_page, mhba->handshake_page_phys);
kfree(mhba->regs);
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[1] = CDB_CORE_MODULE;
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;
}
static 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;
u64 time;
u64 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*/
if (mhba->hba_capability & HS_CAPABILITY_SUPPORT_DYN_SRC)
hs_page2->host_cap = 0x08;/* host dynamic source mode */
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;
time = ktime_get_real_seconds();
local_time = (time - (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;
if (mhba->hba_capability
& HS_CAPABILITY_NEW_PAGE_IO_DEPTH_DEF) {
hs_page4->ob_depth = find_first_bit((unsigned long *)
&mhba->list_num_io,
BITS_PER_LONG);
hs_page4->ib_depth = find_first_bit((unsigned long *)
&mhba->list_num_io,
BITS_PER_LONG);
} else {
hs_page4->ob_depth = (u8) mhba->list_num_io;
hs_page4->ib_depth = (u8) 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;
if (mhba->hba_capability & HS_CAPABILITY_SUPPORT_DYN_SRC)
tmp_size += sizeof(struct mvumi_dyn_list_entry) * mhba->max_io;
tmp_size += 128 + mhba->ob_max_size * mhba->max_io;
tmp_size += 8 + sizeof(u32)*2 + 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;
if (mhba->hba_capability & HS_CAPABILITY_SUPPORT_DYN_SRC) {
v += sizeof(struct mvumi_dyn_list_entry) * mhba->max_io;
p += sizeof(struct mvumi_dyn_list_entry) * mhba->max_io;
mhba->ib_frame = v;
mhba->ib_frame_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)*2;
v += sizeof(u32)*2;
/* ob shadow */
if (mhba->pdev->device == PCI_DEVICE_ID_MARVELL_MV9580) {
offset = round_up(p, 8) - p;
p += offset;
v += offset;
mhba->ob_shadow = v;
mhba->ob_shadow_phys = p;
p += 8;
v += 8;
} else {
offset = round_up(p, 4) - p;
p += offset;
v += offset;
mhba->ob_shadow = v;
mhba->ob_shadow_phys = p;
p += 4;
v += 4;
}
/* 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);
if (mhba->hba_capability & HS_CAPABILITY_SUPPORT_COMPACT_SG)
mhba->eot_flag = 22;
else
mhba->eot_flag = 27;
if (mhba->hba_capability & HS_CAPABILITY_NEW_PAGE_IO_DEPTH_DEF)
mhba->list_num_io = 1 << hs_page1->cl_inout_list_depth;
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;
struct mvumi_hw_regs *regs = mhba->regs;
if (mhba->fw_state == FW_STATE_STARTING)
hs_state = HS_S_START;
else {
tmp = ioread32(regs->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->pciea_to_arm_msg1);
iowrite32(hs_fun, regs->pciea_to_arm_msg0);
iowrite32(DRBL_HANDSHAKE, regs->pciea_to_arm_drbl_reg);
break;
case HS_S_RESET:
iowrite32(lower_32_bits(mhba->handshake_page_phys),
regs->pciea_to_arm_msg1);
iowrite32(upper_32_bits(mhba->handshake_page_phys),
regs->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->pciea_to_arm_msg0);
iowrite32(DRBL_HANDSHAKE, regs->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->pciea_to_arm_msg0);
iowrite32(DRBL_HANDSHAKE, regs->pciea_to_arm_drbl_reg);
break;
case HS_S_END:
/* Set communication list ISR */
tmp = ioread32(regs->enpointa_mask_reg);
tmp |= regs->int_comaout | regs->int_comaerr;
iowrite32(tmp, regs->enpointa_mask_reg);
iowrite32(mhba->list_num_io, mhba->ib_shadow);
/* Set InBound List Available count shadow */
iowrite32(lower_32_bits(mhba->ib_shadow_phys),
regs->inb_aval_count_basel);
iowrite32(upper_32_bits(mhba->ib_shadow_phys),
regs->inb_aval_count_baseh);
if (mhba->pdev->device == PCI_DEVICE_ID_MARVELL_MV9143) {
/* Set OutBound List Available count shadow */
iowrite32((mhba->list_num_io-1) |
regs->cl_pointer_toggle,
mhba->ob_shadow);
iowrite32(lower_32_bits(mhba->ob_shadow_phys),
regs->outb_copy_basel);
iowrite32(upper_32_bits(mhba->ob_shadow_phys),
regs->outb_copy_baseh);
}
mhba->ib_cur_slot = (mhba->list_num_io - 1) |
regs->cl_pointer_toggle;
mhba->ob_cur_slot = (mhba->list_num_io - 1) |
regs->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);
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)
{
unsigned int tmp;
unsigned long before;
before = jiffies;
tmp = ioread32(mhba->regs->arm_to_pciea_msg1);
while ((tmp != HANDSHAKE_READYSTATE) && (tmp != HANDSHAKE_DONESTATE)) {
if (tmp != HANDSHAKE_READYSTATE)
iowrite32(DRBL_MU_RESET,
mhba->regs->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(mhba->regs->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)
{
unsigned int tmp;
struct mvumi_hw_regs *regs = mhba->regs;
/* clear Door bell */
tmp = ioread32(regs->arm_to_pciea_drbl_reg);
iowrite32(tmp, regs->arm_to_pciea_drbl_reg);
iowrite32(regs->int_drbl_int_mask, regs->arm_to_pciea_mask_reg);
tmp = ioread32(regs->enpointa_mask_reg) | regs->int_dl_cpu2pciea;
iowrite32(tmp, regs->enpointa_mask_reg);
msleep(100);
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))
dma_unmap_sg(&mhba->pdev->dev, scsi_sglist(scmd),
scsi_sg_count(scmd),
scmd->sc_data_direction);
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 int mvumi_handle_hotplug(struct mvumi_hba *mhba, u16 devid, int status)
{
struct scsi_device *sdev;
int ret = -1;
if (status == DEVICE_OFFLINE) {
sdev = scsi_device_lookup(mhba->shost, 0, devid, 0);
if (sdev) {
dev_dbg(&mhba->pdev->dev, "remove disk %d-%d-%d.\n", 0,
sdev->id, 0);
scsi_remove_device(sdev);
scsi_device_put(sdev);
ret = 0;
} else
dev_err(&mhba->pdev->dev, " no disk[%d] to remove\n",
devid);
} else if (status == DEVICE_ONLINE) {
sdev = scsi_device_lookup(mhba->shost, 0, devid, 0);
if (!sdev) {
scsi_add_device(mhba->shost, 0, devid, 0);
dev_dbg(&mhba->pdev->dev, " add disk %d-%d-%d.\n", 0,
devid, 0);
ret = 0;
} else {
dev_err(&mhba->pdev->dev, " don't add disk %d-%d-%d.\n",
0, devid, 0);
scsi_device_put(sdev);
}
}
return ret;
}
static u64 mvumi_inquiry(struct mvumi_hba *mhba,
unsigned int id, struct mvumi_cmd *cmd)
{
struct mvumi_msg_frame *frame;
u64 wwid = 0;
int cmd_alloc = 0;
int data_buf_len = 64;
if (!cmd) {
cmd = mvumi_create_internal_cmd(mhba, data_buf_len);
if (cmd)
cmd_alloc = 1;
else
return 0;
} else {
memset(cmd->data_buf, 0, data_buf_len);
}
cmd->scmd = NULL;
cmd->cmd_status = REQ_STATUS_PENDING;
atomic_set(&cmd->sync_cmd, 0);
frame = cmd->frame;
frame->device_id = (u16) id;
frame->cmd_flag = CMD_FLAG_DATA_IN;
frame->req_function = CL_FUN_SCSI_CMD;
frame->cdb_length = 6;
frame->data_transfer_length = MVUMI_INQUIRY_LENGTH;
memset(frame->cdb, 0, frame->cdb_length);
frame->cdb[0] = INQUIRY;
frame->cdb[4] = frame->data_transfer_length;
mvumi_issue_blocked_cmd(mhba, cmd);
if (cmd->cmd_status == SAM_STAT_GOOD) {
if (mhba->pdev->device == PCI_DEVICE_ID_MARVELL_MV9143)
wwid = id + 1;
else
memcpy((void *)&wwid,
(cmd->data_buf + MVUMI_INQUIRY_UUID_OFF),
MVUMI_INQUIRY_UUID_LEN);
dev_dbg(&mhba->pdev->dev,
"inquiry device(0:%d:0) wwid(%llx)\n", id, wwid);
} else {
wwid = 0;
}
if (cmd_alloc)
mvumi_delete_internal_cmd(mhba, cmd);
return wwid;
}
static void mvumi_detach_devices(struct mvumi_hba *mhba)
{
struct mvumi_device *mv_dev = NULL , *dev_next;
struct scsi_device *sdev = NULL;
mutex_lock(&mhba->device_lock);
/* detach Hard Disk */
list_for_each_entry_safe(mv_dev, dev_next,
&mhba->shost_dev_list, list) {
mvumi_handle_hotplug(mhba, mv_dev->id, DEVICE_OFFLINE);
list_del_init(&mv_dev->list);
dev_dbg(&mhba->pdev->dev, "release device(0:%d:0) wwid(%llx)\n",
mv_dev->id, mv_dev->wwid);
kfree(mv_dev);
}
list_for_each_entry_safe(mv_dev, dev_next, &mhba->mhba_dev_list, list) {
list_del_init(&mv_dev->list);
dev_dbg(&mhba->pdev->dev, "release device(0:%d:0) wwid(%llx)\n",
mv_dev->id, mv_dev->wwid);
kfree(mv_dev);
}
/* detach virtual device */
if (mhba->pdev->device == PCI_DEVICE_ID_MARVELL_MV9580)
sdev = scsi_device_lookup(mhba->shost, 0,
mhba->max_target_id - 1, 0);
if (sdev) {
scsi_remove_device(sdev);
scsi_device_put(sdev);
}
mutex_unlock(&mhba->device_lock);
}
static void mvumi_rescan_devices(struct mvumi_hba *mhba, int id)
{
struct scsi_device *sdev;
sdev = scsi_device_lookup(mhba->shost, 0, id, 0);
if (sdev) {
scsi_rescan_device(&sdev->sdev_gendev);
scsi_device_put(sdev);
}
}
static int mvumi_match_devices(struct mvumi_hba *mhba, int id, u64 wwid)
{
struct mvumi_device *mv_dev = NULL;
list_for_each_entry(mv_dev, &mhba->shost_dev_list, list) {
if (mv_dev->wwid == wwid) {
if (mv_dev->id != id) {
dev_err(&mhba->pdev->dev,
"%s has same wwid[%llx] ,"
" but different id[%d %d]\n",
__func__, mv_dev->wwid, mv_dev->id, id);
return -1;
} else {
if (mhba->pdev->device ==
PCI_DEVICE_ID_MARVELL_MV9143)
mvumi_rescan_devices(mhba, id);
return 1;
}
}
}
return 0;
}
static void mvumi_remove_devices(struct mvumi_hba *mhba, int id)
{
struct mvumi_device *mv_dev = NULL, *dev_next;
list_for_each_entry_safe(mv_dev, dev_next,
&mhba->shost_dev_list, list) {
if (mv_dev->id == id) {
dev_dbg(&mhba->pdev->dev,
"detach device(0:%d:0) wwid(%llx) from HOST\n",
mv_dev->id, mv_dev->wwid);
mvumi_handle_hotplug(mhba, mv_dev->id, DEVICE_OFFLINE);
list_del_init(&mv_dev->list);
kfree(mv_dev);
}
}
}
static int mvumi_probe_devices(struct mvumi_hba *mhba)
{
int id, maxid;
u64 wwid = 0;
struct mvumi_device *mv_dev = NULL;
struct mvumi_cmd *cmd = NULL;
int found = 0;
cmd = mvumi_create_internal_cmd(mhba, 64);
if (!cmd)
return -1;
if (mhba->pdev->device == PCI_DEVICE_ID_MARVELL_MV9143)
maxid = mhba->max_target_id;
else
maxid = mhba->max_target_id - 1;
for (id = 0; id < maxid; id++) {
wwid = mvumi_inquiry(mhba, id, cmd);
if (!wwid) {
/* device no response, remove it */
mvumi_remove_devices(mhba, id);
} else {
/* device response, add it */
found = mvumi_match_devices(mhba, id, wwid);
if (!found) {
mvumi_remove_devices(mhba, id);
mv_dev = kzalloc(sizeof(struct mvumi_device),
GFP_KERNEL);
if (!mv_dev) {
dev_err(&mhba->pdev->dev,
"%s alloc mv_dev failed\n",
__func__);
continue;
}
mv_dev->id = id;
mv_dev->wwid = wwid;
mv_dev->sdev = NULL;
INIT_LIST_HEAD(&mv_dev->list);
list_add_tail(&mv_dev->list,
&mhba->mhba_dev_list);
dev_dbg(&mhba->pdev->dev,
"probe a new device(0:%d:0)"
" wwid(%llx)\n", id, mv_dev->wwid);
} else if (found == -1)
return -1;
else
continue;
}
}
if (cmd)
mvumi_delete_internal_cmd(mhba, cmd);
return 0;
}
static int mvumi_rescan_bus(void *data)
{
int ret = 0;
struct mvumi_hba *mhba = (struct mvumi_hba *) data;
struct mvumi_device *mv_dev = NULL , *dev_next;
while (!kthread_should_stop()) {
set_current_state(TASK_INTERRUPTIBLE);
if (!atomic_read(&mhba->pnp_count))
schedule();
msleep(1000);
atomic_set(&mhba->pnp_count, 0);
__set_current_state(TASK_RUNNING);
mutex_lock(&mhba->device_lock);
ret = mvumi_probe_devices(mhba);
if (!ret) {
list_for_each_entry_safe(mv_dev, dev_next,
&mhba->mhba_dev_list, list) {
if (mvumi_handle_hotplug(mhba, mv_dev->id,
DEVICE_ONLINE)) {
dev_err(&mhba->pdev->dev,
"%s add device(0:%d:0) failed"
"wwid(%llx) has exist\n",
__func__,
mv_dev->id, mv_dev->wwid);
list_del_init(&mv_dev->list);
kfree(mv_dev);
} else {
list_move_tail(&mv_dev->list,
&mhba->shost_dev_list);
}
}
}
mutex_unlock(&mhba->device_lock);
}
return 0;
}
static void mvumi_proc_msg(struct mvumi_hba *mhba,
struct mvumi_hotplug_event *param)
{
u16 size = param->size;
const unsigned long *ar_bitmap;
const unsigned long *re_bitmap;
int index;
if (mhba->fw_flag & MVUMI_FW_ATTACH) {
index = -1;
ar_bitmap = (const unsigned long *) param->bitmap;
re_bitmap = (const unsigned long *) &param->bitmap[size >> 3];
mutex_lock(&mhba->sas_discovery_mutex);
do {
index = find_next_zero_bit(ar_bitmap, size, index + 1);
if (index >= size)
break;
mvumi_handle_hotplug(mhba, index, DEVICE_ONLINE);
} while (1);
index = -1;
do {
index = find_next_zero_bit(re_bitmap, size, index + 1);
if (index >= size)
break;
mvumi_handle_hotplug(mhba, index, DEVICE_OFFLINE);
} while (1);
mutex_unlock(&mhba->sas_discovery_mutex);
}
}
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);
}
} else if (msg == APICDB1_HOST_GETEVENT) {
mvumi_proc_msg(mhba, buffer);
}
}
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, u32 isr_status)
{
struct mvumi_events_wq *mu_ev;
while (isr_status & (DRBL_BUS_CHANGE | DRBL_EVENT_NOTIFY)) {
if (isr_status & DRBL_BUS_CHANGE) {
atomic_inc(&mhba->pnp_count);
wake_up_process(mhba->dm_thread);
isr_status &= ~(DRBL_BUS_CHANGE);
continue;
}
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 = APICDB1_EVENT_GETEVENT;
isr_status &= ~(DRBL_EVENT_NOTIFY);
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 & mhba->regs->int_dl_cpu2pciea) {
if (mhba->isr_status & (DRBL_BUS_CHANGE | DRBL_EVENT_NOTIFY))
mvumi_launch_events(mhba, mhba->isr_status);
if (mhba->isr_status & DRBL_HANDSHAKE_ISR) {
dev_warn(&mhba->pdev->dev, "enter handshake again!\n");
mvumi_handshake(mhba);
}
}
if (mhba->global_isr & mhba->regs->int_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;
}
mvumi_get_ib_list_entry(mhba, &ib_entry);
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);
if (mhba->hba_capability & HS_CAPABILITY_SUPPORT_DYN_SRC) {
struct mvumi_dyn_list_entry *dle;
dle = ib_entry;
dle->src_low_addr =
cpu_to_le32(lower_32_bits(cmd->frame_phys));
dle->src_high_addr =
cpu_to_le32(upper_32_bits(cmd->frame_phys));
dle->if_length = (frame_len >> 2) & 0xFFF;
} else {
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;
unsigned int count;
enum mvumi_qc_result result;
if (cmd)
list_add_tail(&cmd->queue_pointer, &mhba->waiting_req_list);
count = mhba->instancet->check_ib_list(mhba);
if (list_empty(&mhba->waiting_req_list) || !count)
return;
do {
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;
}
} while (!list_empty(&mhba->waiting_req_list) && count--);
if (num_of_cl_sent > 0)
mvumi_send_ib_list_entry(mhba);
}
/**
* mvumi_enable_intr - Enables interrupts
* @mhba: Adapter soft state
*/
static void mvumi_enable_intr(struct mvumi_hba *mhba)
{
unsigned int mask;
struct mvumi_hw_regs *regs = mhba->regs;
iowrite32(regs->int_drbl_int_mask, regs->arm_to_pciea_mask_reg);
mask = ioread32(regs->enpointa_mask_reg);
mask |= regs->int_dl_cpu2pciea | regs->int_comaout | regs->int_comaerr;
iowrite32(mask, regs->enpointa_mask_reg);
}
/**
* mvumi_disable_intr -Disables interrupt
* @mhba: Adapter soft state
*/
static void mvumi_disable_intr(struct mvumi_hba *mhba)
{
unsigned int mask;
struct mvumi_hw_regs *regs = mhba->regs;
iowrite32(0, regs->arm_to_pciea_mask_reg);
mask = ioread32(regs->enpointa_mask_reg);
mask &= ~(regs->int_dl_cpu2pciea | regs->int_comaout |
regs->int_comaerr);
iowrite32(mask, regs->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;
struct mvumi_hw_regs *regs = mhba->regs;
status = ioread32(regs->main_int_cause_reg);
if (!(status & regs->int_mu) || status == 0xFFFFFFFF)
return 1;
if (unlikely(status & regs->int_comaerr)) {
tmp = ioread32(regs->outb_isr_cause);
if (mhba->pdev->device == PCI_DEVICE_ID_MARVELL_MV9580) {
if (tmp & regs->clic_out_err) {
iowrite32(tmp & regs->clic_out_err,
regs->outb_isr_cause);
}
} else {
if (tmp & (regs->clic_in_err | regs->clic_out_err))
iowrite32(tmp & (regs->clic_in_err |
regs->clic_out_err),
regs->outb_isr_cause);
}
status ^= mhba->regs->int_comaerr;
/* inbound or outbound parity error, command will timeout */
}
if (status & regs->int_comaout) {
tmp = ioread32(regs->outb_isr_cause);
if (tmp & regs->clic_irq)
iowrite32(tmp & regs->clic_irq, regs->outb_isr_cause);
}
if (status & regs->int_dl_cpu2pciea) {
isr_status = ioread32(regs->arm_to_pciea_drbl_reg);
if (isr_status)
iowrite32(isr_status, regs->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
* @mhba: Adapter soft state
*/
static unsigned int mvumi_read_fw_status_reg(struct mvumi_hba *mhba)
{
unsigned int status;
status = ioread32(mhba->regs->arm_to_pciea_drbl_reg);
if (status)
iowrite32(status, mhba->regs->arm_to_pciea_drbl_reg);
return status;
}
static struct mvumi_instance_template mvumi_instance_9143 = {
.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,
.check_ib_list = mvumi_check_ib_list_9143,
.check_ob_list = mvumi_check_ob_list_9143,
.reset_host = mvumi_reset_host_9143,
};
static struct mvumi_instance_template mvumi_instance_9580 = {
.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,
.check_ib_list = mvumi_check_ib_list_9580,
.check_ob_list = mvumi_check_ob_list_9580,
.reset_host = mvumi_reset_host_9580,
};
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)) {
dma_unmap_sg(&mhba->pdev->dev, scsi_sglist(scmd),
scsi_sg_count(scmd),
scmd->sc_data_direction);
}
mvumi_return_cmd(mhba, cmd);
spin_unlock_irqrestore(mhba->shost->host_lock, flags);
return BLK_EH_DONE;
}
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_timed_out = mvumi_timed_out,
.eh_host_reset_handler = mvumi_host_reset,
.bios_param = mvumi_bios_param,
.this_id = -1,
};
static int mvumi_cfg_hw_reg(struct mvumi_hba *mhba)
{
void *base = NULL;
struct mvumi_hw_regs *regs;
switch (mhba->pdev->device) {
case PCI_DEVICE_ID_MARVELL_MV9143:
mhba->mmio = mhba->base_addr[0];
base = mhba->mmio;
if (!mhba->regs) {
mhba->regs = kzalloc(sizeof(*regs), GFP_KERNEL);
if (mhba->regs == NULL)
return -ENOMEM;
}
regs = mhba->regs;
/* For Arm */
regs->ctrl_sts_reg = base + 0x20104;
regs->rstoutn_mask_reg = base + 0x20108;
regs->sys_soft_rst_reg = base + 0x2010C;
regs->main_int_cause_reg = base + 0x20200;
regs->enpointa_mask_reg = base + 0x2020C;
regs->rstoutn_en_reg = base + 0xF1400;
/* For Doorbell */
regs->pciea_to_arm_drbl_reg = base + 0x20400;
regs->arm_to_pciea_drbl_reg = base + 0x20408;
regs->arm_to_pciea_mask_reg = base + 0x2040C;
regs->pciea_to_arm_msg0 = base + 0x20430;
regs->pciea_to_arm_msg1 = base + 0x20434;
regs->arm_to_pciea_msg0 = base + 0x20438;
regs->arm_to_pciea_msg1 = base + 0x2043C;
/* For Message Unit */
regs->inb_aval_count_basel = base + 0x508;
regs->inb_aval_count_baseh = base + 0x50C;
regs->inb_write_pointer = base + 0x518;
regs->inb_read_pointer = base + 0x51C;
regs->outb_coal_cfg = base + 0x568;
regs->outb_copy_basel = base + 0x5B0;
regs->outb_copy_baseh = base + 0x5B4;
regs->outb_copy_pointer = base + 0x544;
regs->outb_read_pointer = base + 0x548;
regs->outb_isr_cause = base + 0x560;
regs->outb_coal_cfg = base + 0x568;
/* Bit setting for HW */
regs->int_comaout = 1 << 8;
regs->int_comaerr = 1 << 6;
regs->int_dl_cpu2pciea = 1 << 1;
regs->cl_pointer_toggle = 1 << 12;
regs->clic_irq = 1 << 1;
regs->clic_in_err = 1 << 8;
regs->clic_out_err = 1 << 12;
regs->cl_slot_num_mask = 0xFFF;
regs->int_drbl_int_mask = 0x3FFFFFFF;
regs->int_mu = regs->int_dl_cpu2pciea | regs->int_comaout |
regs->int_comaerr;
break;
case PCI_DEVICE_ID_MARVELL_MV9580:
mhba->mmio = mhba->base_addr[2];
base = mhba->mmio;
if (!mhba->regs) {
mhba->regs = kzalloc(sizeof(*regs), GFP_KERNEL);
if (mhba->regs == NULL)
return -ENOMEM;
}
regs = mhba->regs;
/* For Arm */
regs->ctrl_sts_reg = base + 0x20104;
regs->rstoutn_mask_reg = base + 0x1010C;
regs->sys_soft_rst_reg = base + 0x10108;
regs->main_int_cause_reg = base + 0x10200;
regs->enpointa_mask_reg = base + 0x1020C;
regs->rstoutn_en_reg = base + 0xF1400;
/* For Doorbell */
regs->pciea_to_arm_drbl_reg = base + 0x10460;
regs->arm_to_pciea_drbl_reg = base + 0x10480;
regs->arm_to_pciea_mask_reg = base + 0x10484;
regs->pciea_to_arm_msg0 = base + 0x10400;
regs->pciea_to_arm_msg1 = base + 0x10404;
regs->arm_to_pciea_msg0 = base + 0x10420;
regs->arm_to_pciea_msg1 = base + 0x10424;
/* For reset*/
regs->reset_request = base + 0x10108;
regs->reset_enable = base + 0x1010c;
/* For Message Unit */
regs->inb_aval_count_basel = base + 0x4008;
regs->inb_aval_count_baseh = base + 0x400C;
regs->inb_write_pointer = base + 0x4018;
regs->inb_read_pointer = base + 0x401C;
regs->outb_copy_basel = base + 0x4058;
regs->outb_copy_baseh = base + 0x405C;
regs->outb_copy_pointer = base + 0x406C;
regs->outb_read_pointer = base + 0x4070;
regs->outb_coal_cfg = base + 0x4080;
regs->outb_isr_cause = base + 0x4088;
/* Bit setting for HW */
regs->int_comaout = 1 << 4;
regs->int_dl_cpu2pciea = 1 << 12;
regs->int_comaerr = 1 << 29;
regs->cl_pointer_toggle = 1 << 14;
regs->cl_slot_num_mask = 0x3FFF;
regs->clic_irq = 1 << 0;
regs->clic_out_err = 1 << 1;
regs->int_drbl_int_mask = 0x3FFFFFFF;
regs->int_mu = regs->int_dl_cpu2pciea | regs->int_comaout;
break;
default:
return -1;
break;
}
return 0;
}
/**
* 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;
switch (mhba->pdev->device) {
case PCI_DEVICE_ID_MARVELL_MV9143:
mhba->instancet = &mvumi_instance_9143;
mhba->io_seq = 0;
mhba->max_sge = MVUMI_MAX_SG_ENTRY;
mhba->request_id_enabled = 1;
break;
case PCI_DEVICE_ID_MARVELL_MV9580:
mhba->instancet = &mvumi_instance_9580;
mhba->io_seq = 0;
mhba->max_sge = MVUMI_MAX_SG_ENTRY;
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);
ret = mvumi_cfg_hw_reg(mhba);
if (ret) {
dev_err(&mhba->pdev->dev,
"failed to allocate memory for reg\n");
ret = -ENOMEM;
goto fail_alloc_mem;
}
mhba->handshake_page = dma_alloc_coherent(&mhba->pdev->dev,
HSP_MAX_SIZE, &mhba->handshake_page_phys, GFP_KERNEL);
if (!mhba->handshake_page) {
dev_err(&mhba->pdev->dev,
"failed to allocate memory for handshake\n");
ret = -ENOMEM;
goto fail_alloc_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);
dma_free_coherent(&mhba->pdev->dev, HSP_MAX_SIZE,
mhba->handshake_page, mhba->handshake_page_phys);
fail_alloc_page:
kfree(mhba->regs);
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;
struct scsi_device *sdev = NULL;
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;
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;
mutex_lock(&mhba->sas_discovery_mutex);
if (mhba->pdev->device == PCI_DEVICE_ID_MARVELL_MV9580)
ret = scsi_add_device(host, 0, mhba->max_target_id - 1, 0);
else
ret = 0;
if (ret) {
dev_err(&mhba->pdev->dev, "add virtual device failed\n");
mutex_unlock(&mhba->sas_discovery_mutex);
goto fail_add_device;
}
mhba->dm_thread = kthread_create(mvumi_rescan_bus,
mhba, "mvumi_scanthread");
if (IS_ERR(mhba->dm_thread)) {
dev_err(&mhba->pdev->dev,
"failed to create device scan thread\n");
mutex_unlock(&mhba->sas_discovery_mutex);
goto fail_create_thread;
}
atomic_set(&mhba->pnp_count, 1);
wake_up_process(mhba->dm_thread);
mutex_unlock(&mhba->sas_discovery_mutex);
return 0;
fail_create_thread:
if (mhba->pdev->device == PCI_DEVICE_ID_MARVELL_MV9580)
sdev = scsi_device_lookup(mhba->shost, 0,
mhba->max_target_id - 1, 0);
if (sdev) {
scsi_remove_device(sdev);
scsi_device_put(sdev);
}
fail_add_device:
scsi_remove_host(mhba->shost);
return ret;
}
/**
* mvumi_probe_one - PCI hotplug entry point
* @pdev: PCI device structure
* @id: PCI ids of supported hotplugged adapter
*/
static int 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;
ret = mvumi_pci_set_master(pdev);
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);
mutex_init(&mhba->device_lock);
INIT_LIST_HEAD(&mhba->mhba_dev_list);
INIT_LIST_HEAD(&mhba->shost_dev_list);
atomic_set(&mhba->fw_outstanding, 0);
init_waitqueue_head(&mhba->int_cmd_wait_q);
mutex_init(&mhba->sas_discovery_mutex);
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);
pci_set_drvdata(pdev, mhba);
ret = mvumi_io_attach(mhba);
if (ret)
goto fail_io_attach;
mvumi_backup_bar_addr(mhba);
dev_dbg(&pdev->dev, "probe mvumi driver successfully.\n");
return 0;
fail_io_attach:
mhba->instancet->disable_intr(mhba);
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);
if (mhba->dm_thread) {
kthread_stop(mhba->dm_thread);
mhba->dm_thread = NULL;
}
mvumi_detach_devices(mhba);
host = mhba->shost;
scsi_remove_host(mhba->shost);
mvumi_flush_cache(mhba);
mhba->instancet->disable_intr(mhba);
free_irq(mhba->pdev->irq, mhba);
mvumi_release_fw(mhba);
scsi_host_put(host);
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 __maybe_unused 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);
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 __maybe_unused 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;
}
ret = mvumi_pci_set_master(pdev);
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;
if (mvumi_cfg_hw_reg(mhba)) {
ret = -EINVAL;
goto unmap_pci_addr;
}
mhba->mmio = mhba->base_addr[0];
mvumi_reset(mhba);
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);
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 = mvumi_detach_one,
.shutdown = mvumi_shutdown,
#ifdef CONFIG_PM
.suspend = mvumi_suspend,
.resume = mvumi_resume,
#endif
};
module_pci_driver(mvumi_pci_driver);
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