scsi: lpfc: Add push-to-adapter support to sli4
New if_type=6 adapters support an additional BAR that provides
apertures to allow direct WQE to adapter push support - termed
Direct Packet Push (DPP). WQ creation differs slightly to ask for
a WQ to be DPP-ized. When submitting a WQE to a DPP WQ, it is
submitted to the host memory for the WQ normally, but is also
written by the host cpu directly to a BAR aperture. Write buffer
coalescing in hardware is (hopefully) turned on, enabling single
pci write operation support. The doorbell is thing rung to indicate
the WQE is available and was pushed to the aperture.
This patch:
- Updates the WQ Create commands for the DPP options
- Adds the bar mapping for if_type=6 DPP bar
- Adds the WQE pushing to the DDP aperture received from WQ create
- Adds a new module parameter to disable DPP operation if desired.
Default is enabled.
Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
diff --git a/drivers/scsi/lpfc/lpfc_hw4.h b/drivers/scsi/lpfc/lpfc_hw4.h
index 93fd9fd..60ccff6 100644
--- a/drivers/scsi/lpfc/lpfc_hw4.h
+++ b/drivers/scsi/lpfc/lpfc_hw4.h
@@ -1372,6 +1372,15 @@ struct lpfc_mbx_wq_create {
#define lpfc_mbx_wq_create_page_size_MASK 0x000000FF
#define lpfc_mbx_wq_create_page_size_WORD word1
#define LPFC_WQ_PAGE_SIZE_4096 0x1
+#define lpfc_mbx_wq_create_dpp_req_SHIFT 15
+#define lpfc_mbx_wq_create_dpp_req_MASK 0x00000001
+#define lpfc_mbx_wq_create_dpp_req_WORD word1
+#define lpfc_mbx_wq_create_doe_SHIFT 14
+#define lpfc_mbx_wq_create_doe_MASK 0x00000001
+#define lpfc_mbx_wq_create_doe_WORD word1
+#define lpfc_mbx_wq_create_toe_SHIFT 13
+#define lpfc_mbx_wq_create_toe_MASK 0x00000001
+#define lpfc_mbx_wq_create_toe_WORD word1
#define lpfc_mbx_wq_create_wqe_size_SHIFT 8
#define lpfc_mbx_wq_create_wqe_size_MASK 0x0000000F
#define lpfc_mbx_wq_create_wqe_size_WORD word1
@@ -1400,6 +1409,28 @@ struct lpfc_mbx_wq_create {
#define lpfc_mbx_wq_create_db_format_MASK 0x0000FFFF
#define lpfc_mbx_wq_create_db_format_WORD word2
} response;
+ struct {
+ uint32_t word0;
+#define lpfc_mbx_wq_create_dpp_rsp_SHIFT 31
+#define lpfc_mbx_wq_create_dpp_rsp_MASK 0x00000001
+#define lpfc_mbx_wq_create_dpp_rsp_WORD word0
+#define lpfc_mbx_wq_create_v1_q_id_SHIFT 0
+#define lpfc_mbx_wq_create_v1_q_id_MASK 0x0000FFFF
+#define lpfc_mbx_wq_create_v1_q_id_WORD word0
+ uint32_t word1;
+#define lpfc_mbx_wq_create_v1_bar_set_SHIFT 0
+#define lpfc_mbx_wq_create_v1_bar_set_MASK 0x0000000F
+#define lpfc_mbx_wq_create_v1_bar_set_WORD word1
+ uint32_t doorbell_offset;
+ uint32_t word3;
+#define lpfc_mbx_wq_create_dpp_id_SHIFT 16
+#define lpfc_mbx_wq_create_dpp_id_MASK 0x0000001F
+#define lpfc_mbx_wq_create_dpp_id_WORD word3
+#define lpfc_mbx_wq_create_dpp_bar_SHIFT 0
+#define lpfc_mbx_wq_create_dpp_bar_MASK 0x0000000F
+#define lpfc_mbx_wq_create_dpp_bar_WORD word3
+ uint32_t dpp_offset;
+ } response_1;
} u;
};