lkml.org 
[lkml]   [2015]   [Nov]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v4 27/32] scsi: hisi_sas: add smp protocol support
Date
Add support for smp function, which allows devices
attached by expander to be controlled

Signed-off-by: John Garry <john.garry@huawei.com>
---
drivers/scsi/hisi_sas/hisi_sas.h | 3 ++
drivers/scsi/hisi_sas/hisi_sas_main.c | 9 ++++
drivers/scsi/hisi_sas/hisi_sas_v1_hw.c | 88 ++++++++++++++++++++++++++++++++++
3 files changed, 100 insertions(+)

diff --git a/drivers/scsi/hisi_sas/hisi_sas.h b/drivers/scsi/hisi_sas/hisi_sas.h
index e5ee3c9..f34f73b 100644
--- a/drivers/scsi/hisi_sas/hisi_sas.h
+++ b/drivers/scsi/hisi_sas/hisi_sas.h
@@ -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,
diff --git a/drivers/scsi/hisi_sas/hisi_sas_main.c b/drivers/scsi/hisi_sas/hisi_sas_main.c
index 1797851..406ffa0 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_main.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_main.c
@@ -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;
diff --git a/drivers/scsi/hisi_sas/hisi_sas_v1_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v1_hw.c
index ad50aed..64b17a1 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_v1_hw.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_v1_hw.c
@@ -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,
--
1.9.1


\
 
 \ /
  Last update: 2015-11-16 15:01    [W:0.155 / U:2.096 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site