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hisi_sas: Add smp protocol support 

Add support for smp function, which allows devices attached by expander
to be controlled.

Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
John Garry 2015-11-18 00:50:54 +08:00 committed by Martin K. Petersen
parent dc5da4cf8e
commit 66ee999b4e
3 changed files with 100 additions and 0 deletions
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3
drivers/scsi/hisi_sas/hisi_sas.h
View File

@ -36,6 +36,7 @@
(((sizeof(union hisi_sas_command_table)+3)/4)*4)
#define HISI_SAS_MAX_SSP_RESP_SZ (sizeof(struct ssp_frame_hdr) + 1024)
#define HISI_SAS_MAX_SMP_RESP_SZ 1028
#define HISI_SAS_NAME_LEN 32
@ -132,6 +133,8 @@ struct hisi_sas_hw {
int (*prep_ssp)(struct hisi_hba *hisi_hba,
struct hisi_sas_slot *slot, int is_tmf,
struct hisi_sas_tmf_task *tmf);
int (*prep_smp)(struct hisi_hba *hisi_hba,
struct hisi_sas_slot *slot);
int (*slot_complete)(struct hisi_hba *hisi_hba,
struct hisi_sas_slot *slot, int abort);
void (*free_device)(struct hisi_hba *hisi_hba,

9
drivers/scsi/hisi_sas/hisi_sas_main.c
View File

@ -98,6 +98,12 @@ void hisi_sas_slot_task_free(struct hisi_hba *hisi_hba, struct sas_task *task,
}
EXPORT_SYMBOL_GPL(hisi_sas_slot_task_free);
static int hisi_sas_task_prep_smp(struct hisi_hba *hisi_hba,
struct hisi_sas_slot *slot)
{
return hisi_hba->hw->prep_smp(hisi_hba, slot);
}
static int hisi_sas_task_prep_ssp(struct hisi_hba *hisi_hba,
struct hisi_sas_slot *slot, int is_tmf,
struct hisi_sas_tmf_task *tmf)
@ -215,6 +221,9 @@ static int hisi_sas_task_prep(struct sas_task *task, struct hisi_hba *hisi_hba,
memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
switch (task->task_proto) {
case SAS_PROTOCOL_SMP:
rc = hisi_sas_task_prep_smp(hisi_hba, slot);
break;
case SAS_PROTOCOL_SSP:
rc = hisi_sas_task_prep_ssp(hisi_hba, slot, is_tmf, tmf);
break;

88
drivers/scsi/hisi_sas/hisi_sas_v1_hw.c
View File

@ -903,6 +903,74 @@ static int prep_prd_sge_v1_hw(struct hisi_hba *hisi_hba,
return 0;
}
static int prep_smp_v1_hw(struct hisi_hba *hisi_hba,
struct hisi_sas_slot *slot)
{
struct sas_task *task = slot->task;
struct hisi_sas_cmd_hdr *hdr = slot->cmd_hdr;
struct domain_device *device = task->dev;
struct device *dev = &hisi_hba->pdev->dev;
struct hisi_sas_port *port = slot->port;
struct scatterlist *sg_req, *sg_resp;
struct hisi_sas_device *sas_dev = device->lldd_dev;
dma_addr_t req_dma_addr;
unsigned int req_len, resp_len;
int elem, rc;
/*
* DMA-map SMP request, response buffers
*/
/* req */
sg_req = &task->smp_task.smp_req;
elem = dma_map_sg(dev, sg_req, 1, DMA_TO_DEVICE);
if (!elem)
return -ENOMEM;
req_len = sg_dma_len(sg_req);
req_dma_addr = sg_dma_address(sg_req);
/* resp */
sg_resp = &task->smp_task.smp_resp;
elem = dma_map_sg(dev, sg_resp, 1, DMA_FROM_DEVICE);
if (!elem) {
rc = -ENOMEM;
goto err_out_req;
}
resp_len = sg_dma_len(sg_resp);
if ((req_len & 0x3) || (resp_len & 0x3)) {
rc = -EINVAL;
goto err_out_resp;
}
/* create header */
/* dw0 */
hdr->dw0 = cpu_to_le32((port->id << CMD_HDR_PORT_OFF) |
(1 << CMD_HDR_PRIORITY_OFF) | /* high pri */
(1 << CMD_HDR_MODE_OFF) | /* ini mode */
(2 << CMD_HDR_CMD_OFF)); /* smp */
/* map itct entry */
hdr->dw1 = cpu_to_le32(sas_dev->device_id << CMD_HDR_DEVICE_ID_OFF);
/* dw2 */
hdr->dw2 = cpu_to_le32((((req_len-4)/4) << CMD_HDR_CFL_OFF) |
(HISI_SAS_MAX_SMP_RESP_SZ/4 <<
CMD_HDR_MRFL_OFF));
hdr->transfer_tags = cpu_to_le32(slot->idx << CMD_HDR_IPTT_OFF);
hdr->cmd_table_addr = cpu_to_le64(req_dma_addr);
hdr->sts_buffer_addr = cpu_to_le64(slot->status_buffer_dma);
return 0;
err_out_resp:
dma_unmap_sg(dev, &slot->task->smp_task.smp_resp, 1,
DMA_FROM_DEVICE);
err_out_req:
dma_unmap_sg(dev, &slot->task->smp_task.smp_req, 1,
DMA_TO_DEVICE);
return rc;
}
static int prep_ssp_v1_hw(struct hisi_hba *hisi_hba,
struct hisi_sas_slot *slot, int is_tmf,
@ -1223,6 +1291,25 @@ static int slot_complete_v1_hw(struct hisi_hba *hisi_hba,
sas_ssp_task_response(dev, task, iu);
break;
}
case SAS_PROTOCOL_SMP:
{
void *to;
struct scatterlist *sg_resp = &task->smp_task.smp_resp;
ts->stat = SAM_STAT_GOOD;
to = kmap_atomic(sg_page(sg_resp));
dma_unmap_sg(dev, &task->smp_task.smp_resp, 1,
DMA_FROM_DEVICE);
dma_unmap_sg(dev, &task->smp_task.smp_req, 1,
DMA_TO_DEVICE);
memcpy(to + sg_resp->offset,
slot->status_buffer +
sizeof(struct hisi_sas_err_record),
sg_dma_len(sg_resp));
kunmap_atomic(to);
break;
}
case SAS_PROTOCOL_SATA:
case SAS_PROTOCOL_STP:
case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
@ -1595,6 +1682,7 @@ static const struct hisi_sas_hw hisi_sas_v1_hw = {
.setup_itct = setup_itct_v1_hw,
.sl_notify = sl_notify_v1_hw,
.free_device = free_device_v1_hw,
.prep_smp = prep_smp_v1_hw,
.prep_ssp = prep_ssp_v1_hw,
.get_free_slot = get_free_slot_v1_hw,
.start_delivery = start_delivery_v1_hw,