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[SCSI] qla4xxx: Add pex-dma support for capturing minidump 

Add pex-dma support for ISP8324 and ISP8042 to improve
the minidump capture time.

Signed-off-by: Santosh Vernekar <santosh.vernekar@qlogic.com>
Signed-off-by: Vikas Chaudhary <vikas.chaudhary@qlogic.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Santosh Vernekar 2013-08-23 03:40:18 -04:00 committed by James Bottomley
parent 909ee499c1
commit 41f79bde1d
4 changed files with 263 additions and 3 deletions
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4
drivers/scsi/qla4xxx/ql4_83xx.c
View File

@ -259,8 +259,8 @@ void qla4_83xx_rom_lock_recovery(struct scsi_qla_host *ha)
* Return: On success return QLA_SUCCESS
* On error return QLA_ERROR
**/
static int qla4_83xx_ms_mem_write_128b(struct scsi_qla_host *ha, uint64_t addr,
uint32_t *data, uint32_t count)
int qla4_83xx_ms_mem_write_128b(struct scsi_qla_host *ha, uint64_t addr,
uint32_t *data, uint32_t count)
{
int i, j;
uint32_t agt_ctrl;

34
drivers/scsi/qla4xxx/ql4_83xx.h
View File

@ -290,4 +290,38 @@ struct qla4_83xx_idc_information {
uint32_t info3; /* IDC additional info */
};
#define QLA83XX_PEX_DMA_ENGINE_INDEX 8
#define QLA83XX_PEX_DMA_BASE_ADDRESS 0x77320000
#define QLA83XX_PEX_DMA_NUM_OFFSET 0x10000
#define QLA83XX_PEX_DMA_CMD_ADDR_LOW 0x0
#define QLA83XX_PEX_DMA_CMD_ADDR_HIGH 0x04
#define QLA83XX_PEX_DMA_CMD_STS_AND_CNTRL 0x08
#define QLA83XX_PEX_DMA_READ_SIZE (16 * 1024)
#define QLA83XX_PEX_DMA_MAX_WAIT (100 * 100) /* Max wait of 100 msecs */
/* Read Memory: For Pex-DMA */
struct qla4_83xx_minidump_entry_rdmem_pex_dma {
struct qla8xxx_minidump_entry_hdr h;
uint32_t desc_card_addr;
uint16_t dma_desc_cmd;
uint8_t rsvd[2];
uint32_t start_dma_cmd;
uint8_t rsvd2[12];
uint32_t read_addr;
uint32_t read_data_size;
};
struct qla4_83xx_pex_dma_descriptor {
struct {
uint32_t read_data_size; /* 0-23: size, 24-31: rsvd */
uint8_t rsvd[2];
uint16_t dma_desc_cmd;
} cmd;
uint64_t src_addr;
uint64_t dma_bus_addr; /* 0-3: desc-cmd, 4-7: pci-func,
* 8-15: desc-cmd */
uint8_t rsvd[24];
} __packed;
#endif

2
drivers/scsi/qla4xxx/ql4_glbl.h
View File

@ -272,6 +272,8 @@ int qla4xxx_set_acb(struct scsi_qla_host *ha, uint32_t *mbox_cmd,
int qla4xxx_get_acb(struct scsi_qla_host *ha, dma_addr_t acb_dma,
uint32_t acb_type, uint32_t len);
int qla4_84xx_config_acb(struct scsi_qla_host *ha, int acb_config);
int qla4_83xx_ms_mem_write_128b(struct scsi_qla_host *ha,
uint64_t addr, uint32_t *data, uint32_t count);
extern int ql4xextended_error_logging;
extern int ql4xdontresethba;

226
drivers/scsi/qla4xxx/ql4_nx.c
View File

@ -1737,6 +1737,208 @@ static void qla4_8xxx_minidump_process_rdcrb(struct scsi_qla_host *ha,
*d_ptr = data_ptr;
}
static int qla4_83xx_check_dma_engine_state(struct scsi_qla_host *ha)
{
int rval = QLA_SUCCESS;
uint32_t dma_eng_num = 0, cmd_sts_and_cntrl = 0;
uint64_t dma_base_addr = 0;
struct qla4_8xxx_minidump_template_hdr *tmplt_hdr = NULL;
tmplt_hdr = (struct qla4_8xxx_minidump_template_hdr *)
ha->fw_dump_tmplt_hdr;
dma_eng_num =
tmplt_hdr->saved_state_array[QLA83XX_PEX_DMA_ENGINE_INDEX];
dma_base_addr = QLA83XX_PEX_DMA_BASE_ADDRESS +
(dma_eng_num * QLA83XX_PEX_DMA_NUM_OFFSET);
/* Read the pex-dma's command-status-and-control register. */
rval = ha->isp_ops->rd_reg_indirect(ha,
(dma_base_addr + QLA83XX_PEX_DMA_CMD_STS_AND_CNTRL),
&cmd_sts_and_cntrl);
if (rval)
return QLA_ERROR;
/* Check if requested pex-dma engine is available. */
if (cmd_sts_and_cntrl & BIT_31)
return QLA_SUCCESS;
else
return QLA_ERROR;
}
static int qla4_83xx_start_pex_dma(struct scsi_qla_host *ha,
struct qla4_83xx_minidump_entry_rdmem_pex_dma *m_hdr)
{
int rval = QLA_SUCCESS, wait = 0;
uint32_t dma_eng_num = 0, cmd_sts_and_cntrl = 0;
uint64_t dma_base_addr = 0;
struct qla4_8xxx_minidump_template_hdr *tmplt_hdr = NULL;
tmplt_hdr = (struct qla4_8xxx_minidump_template_hdr *)
ha->fw_dump_tmplt_hdr;
dma_eng_num =
tmplt_hdr->saved_state_array[QLA83XX_PEX_DMA_ENGINE_INDEX];
dma_base_addr = QLA83XX_PEX_DMA_BASE_ADDRESS +
(dma_eng_num * QLA83XX_PEX_DMA_NUM_OFFSET);
rval = ha->isp_ops->wr_reg_indirect(ha,
dma_base_addr + QLA83XX_PEX_DMA_CMD_ADDR_LOW,
m_hdr->desc_card_addr);
if (rval)
goto error_exit;
rval = ha->isp_ops->wr_reg_indirect(ha,
dma_base_addr + QLA83XX_PEX_DMA_CMD_ADDR_HIGH, 0);
if (rval)
goto error_exit;
rval = ha->isp_ops->wr_reg_indirect(ha,
dma_base_addr + QLA83XX_PEX_DMA_CMD_STS_AND_CNTRL,
m_hdr->start_dma_cmd);
if (rval)
goto error_exit;
/* Wait for dma operation to complete. */
for (wait = 0; wait < QLA83XX_PEX_DMA_MAX_WAIT; wait++) {
rval = ha->isp_ops->rd_reg_indirect(ha,
(dma_base_addr + QLA83XX_PEX_DMA_CMD_STS_AND_CNTRL),
&cmd_sts_and_cntrl);
if (rval)
goto error_exit;
if ((cmd_sts_and_cntrl & BIT_1) == 0)
break;
else
udelay(10);
}
/* Wait a max of 100 ms, otherwise fallback to rdmem entry read */
if (wait >= QLA83XX_PEX_DMA_MAX_WAIT) {
rval = QLA_ERROR;
goto error_exit;
}
error_exit:
return rval;
}
static int qla4_83xx_minidump_pex_dma_read(struct scsi_qla_host *ha,
struct qla8xxx_minidump_entry_hdr *entry_hdr,
uint32_t **d_ptr)
{
int rval = QLA_SUCCESS;
struct qla4_83xx_minidump_entry_rdmem_pex_dma *m_hdr = NULL;
uint32_t size, read_size;
uint8_t *data_ptr = (uint8_t *)*d_ptr;
void *rdmem_buffer = NULL;
dma_addr_t rdmem_dma;
struct qla4_83xx_pex_dma_descriptor dma_desc;
DEBUG2(ql4_printk(KERN_INFO, ha, "Entering fn: %s\n", __func__));
rval = qla4_83xx_check_dma_engine_state(ha);
if (rval != QLA_SUCCESS) {
DEBUG2(ql4_printk(KERN_INFO, ha,
"%s: DMA engine not available. Fallback to rdmem-read.\n",
__func__));
return QLA_ERROR;
}
m_hdr = (struct qla4_83xx_minidump_entry_rdmem_pex_dma *)entry_hdr;
rdmem_buffer = dma_alloc_coherent(&ha->pdev->dev,
QLA83XX_PEX_DMA_READ_SIZE,
&rdmem_dma, GFP_KERNEL);
if (!rdmem_buffer) {
DEBUG2(ql4_printk(KERN_INFO, ha,
"%s: Unable to allocate rdmem dma buffer\n",
__func__));
return QLA_ERROR;
}
/* Prepare pex-dma descriptor to be written to MS memory. */
/* dma-desc-cmd layout:
* 0-3: dma-desc-cmd 0-3
* 4-7: pcid function number
* 8-15: dma-desc-cmd 8-15
*/
dma_desc.cmd.dma_desc_cmd = (m_hdr->dma_desc_cmd & 0xff0f);
dma_desc.cmd.dma_desc_cmd |= ((PCI_FUNC(ha->pdev->devfn) & 0xf) << 0x4);
dma_desc.dma_bus_addr = rdmem_dma;
size = 0;
read_size = 0;
/*
* Perform rdmem operation using pex-dma.
* Prepare dma in chunks of QLA83XX_PEX_DMA_READ_SIZE.
*/
while (read_size < m_hdr->read_data_size) {
if (m_hdr->read_data_size - read_size >=
QLA83XX_PEX_DMA_READ_SIZE)
size = QLA83XX_PEX_DMA_READ_SIZE;
else {
size = (m_hdr->read_data_size - read_size);
if (rdmem_buffer)
dma_free_coherent(&ha->pdev->dev,
QLA83XX_PEX_DMA_READ_SIZE,
rdmem_buffer, rdmem_dma);
rdmem_buffer = dma_alloc_coherent(&ha->pdev->dev, size,
&rdmem_dma,
GFP_KERNEL);
if (!rdmem_buffer) {
DEBUG2(ql4_printk(KERN_INFO, ha,
"%s: Unable to allocate rdmem dma buffer\n",
__func__));
return QLA_ERROR;
}
dma_desc.dma_bus_addr = rdmem_dma;
}
dma_desc.src_addr = m_hdr->read_addr + read_size;
dma_desc.cmd.read_data_size = size;
/* Prepare: Write pex-dma descriptor to MS memory. */
rval = qla4_83xx_ms_mem_write_128b(ha,
(uint64_t)m_hdr->desc_card_addr,
(uint32_t *)&dma_desc,
(sizeof(struct qla4_83xx_pex_dma_descriptor)/16));
if (rval == -1) {
ql4_printk(KERN_INFO, ha,
"%s: Error writing rdmem-dma-init to MS !!!\n",
__func__);
goto error_exit;
}
DEBUG2(ql4_printk(KERN_INFO, ha,
"%s: Dma-desc: Instruct for rdmem dma (size 0x%x).\n",
__func__, size));
/* Execute: Start pex-dma operation. */
rval = qla4_83xx_start_pex_dma(ha, m_hdr);
if (rval != QLA_SUCCESS) {
DEBUG2(ql4_printk(KERN_INFO, ha,
"scsi(%ld): start-pex-dma failed rval=0x%x\n",
ha->host_no, rval));
goto error_exit;
}
memcpy(data_ptr, rdmem_buffer, size);
data_ptr += size;
read_size += size;
}
DEBUG2(ql4_printk(KERN_INFO, ha, "Leaving fn: %s\n", __func__));
*d_ptr = (uint32_t *)data_ptr;
error_exit:
if (rdmem_buffer)
dma_free_coherent(&ha->pdev->dev, size, rdmem_buffer,
rdmem_dma);
return rval;
}
static int qla4_8xxx_minidump_process_l2tag(struct scsi_qla_host *ha,
struct qla8xxx_minidump_entry_hdr *entry_hdr,
uint32_t **d_ptr)
@ -2068,7 +2270,7 @@ static void qla4_82xx_minidump_process_rdrom(struct scsi_qla_host *ha,
#define MD_MIU_TEST_AGT_ADDR_LO 0x41000094
#define MD_MIU_TEST_AGT_ADDR_HI 0x41000098
static int qla4_8xxx_minidump_process_rdmem(struct scsi_qla_host *ha,
static int __qla4_8xxx_minidump_process_rdmem(struct scsi_qla_host *ha,
struct qla8xxx_minidump_entry_hdr *entry_hdr,
uint32_t **d_ptr)
{
@ -2150,6 +2352,28 @@ static int qla4_8xxx_minidump_process_rdmem(struct scsi_qla_host *ha,
return QLA_SUCCESS;
}
static int qla4_8xxx_minidump_process_rdmem(struct scsi_qla_host *ha,
struct qla8xxx_minidump_entry_hdr *entry_hdr,
uint32_t **d_ptr)
{
uint32_t *data_ptr = *d_ptr;
int rval = QLA_SUCCESS;
if (is_qla8032(ha) || is_qla8042(ha)) {
rval = qla4_83xx_minidump_pex_dma_read(ha, entry_hdr,
&data_ptr);
if (rval != QLA_SUCCESS) {
rval = __qla4_8xxx_minidump_process_rdmem(ha, entry_hdr,
&data_ptr);
}
} else {
rval = __qla4_8xxx_minidump_process_rdmem(ha, entry_hdr,
&data_ptr);
}
*d_ptr = data_ptr;
return rval;
}
static void qla4_8xxx_mark_entry_skipped(struct scsi_qla_host *ha,
struct qla8xxx_minidump_entry_hdr *entry_hdr,
int index)