RDMA/ocrdma: Read ASIC_ID register to select asic_gen

ocrdma driver selects execution path based on sli_family and asic
generation number.  This introduces code to read the asic gen number
from pci register instead of obtaining it from the Emulex NIC driver.

Signed-off-by: Devesh Sharma <devesh.sharma@emulex.com>
Signed-off-by: Selvin Xavier <selvin.xavier@emulex.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>

5 files changed, 35 insertions, 9 deletions

diff --git a/drivers/infiniband/hw/ocrdma/ocrdma.h b/drivers/infiniband/hw/ocrdma/ocrdma.h
index 1b51e67a26d7..24fe248fb35a 100644
--- a/drivers/infiniband/hw/ocrdma/ocrdma.h
+++ b/drivers/infiniband/hw/ocrdma/ocrdma.h
@@ -197,6 +197,7 @@ struct ocrdma_dev {
         int id;
         struct ocrdma_mr *stag_arr[OCRDMA_MAX_STAG];
         u16 pvid;
+        u32 asic_id;
 };
 
 struct ocrdma_cq {
@@ -443,4 +444,16 @@ static inline int ocrdma_get_eq_table_index(struct ocrdma_dev *dev,
         return -EINVAL;
 }
 
+static inline u8 ocrdma_get_asic_type(struct ocrdma_dev *dev)
+{
+        if (dev->nic_info.dev_family == 0xF && !dev->asic_id) {
+                pci_read_config_dword(
+                        dev->nic_info.pdev,
+                        OCRDMA_SLI_ASIC_ID_OFFSET, &dev->asic_id);
+        }
+
+        return (dev->asic_id & OCRDMA_SLI_ASIC_GEN_NUM_MASK) >>
+                                OCRDMA_SLI_ASIC_GEN_NUM_SHIFT;
+}
+
 #endif
diff --git a/drivers/infiniband/hw/ocrdma/ocrdma_hw.c b/drivers/infiniband/hw/ocrdma/ocrdma_hw.c
index e3c75e01feb9..ec310d258553 100644
--- a/drivers/infiniband/hw/ocrdma/ocrdma_hw.c
+++ b/drivers/infiniband/hw/ocrdma/ocrdma_hw.c
@@ -1037,7 +1037,7 @@ static void ocrdma_get_attr(struct ocrdma_dev *dev,
         attr->max_inline_data =
             attr->wqe_size - (sizeof(struct ocrdma_hdr_wqe) +
                               sizeof(struct ocrdma_sge));
-        if (dev->nic_info.dev_family == OCRDMA_GEN2_FAMILY) {
+        if (ocrdma_get_asic_type(dev) == OCRDMA_ASIC_GEN_SKH_R) {
                 attr->ird = 1;
                 attr->ird_page_size = OCRDMA_MIN_Q_PAGE_SIZE;
                 attr->num_ird_pages = MAX_OCRDMA_IRD_PAGES;
@@ -1379,7 +1379,7 @@ int ocrdma_mbx_create_cq(struct ocrdma_dev *dev, struct ocrdma_cq *cq,
                        __func__, dev->id, dev->attr.max_cqe, entries);
                 return -EINVAL;
         }
-        if (dpp_cq && (dev->nic_info.dev_family != OCRDMA_GEN2_FAMILY))
+        if (dpp_cq && (ocrdma_get_asic_type(dev) != OCRDMA_ASIC_GEN_SKH_R))
                 return -EINVAL;
 
         if (dpp_cq) {
@@ -1439,7 +1439,7 @@ int ocrdma_mbx_create_cq(struct ocrdma_dev *dev, struct ocrdma_cq *cq,
         }
         /* shared eq between all the consumer cqs. */
         cmd->cmd.eqn = cq->eqn;
-        if (dev->nic_info.dev_family == OCRDMA_GEN2_FAMILY) {
+        if (ocrdma_get_asic_type(dev) == OCRDMA_ASIC_GEN_SKH_R) {
                 if (dpp_cq)
                         cmd->cmd.pgsz_pgcnt |= OCRDMA_CREATE_CQ_DPP <<
                                 OCRDMA_CREATE_CQ_TYPE_SHIFT;
diff --git a/drivers/infiniband/hw/ocrdma/ocrdma_main.c b/drivers/infiniband/hw/ocrdma/ocrdma_main.c
index 1a8a945efa60..b9e147816703 100644
--- a/drivers/infiniband/hw/ocrdma/ocrdma_main.c
+++ b/drivers/infiniband/hw/ocrdma/ocrdma_main.c
@@ -286,7 +286,7 @@ static int ocrdma_register_device(struct ocrdma_dev *dev)
 
         dev->ibdev.process_mad = ocrdma_process_mad;
 
-        if (dev->nic_info.dev_family == OCRDMA_GEN2_FAMILY) {
+        if (ocrdma_get_asic_type(dev) == OCRDMA_ASIC_GEN_SKH_R) {
                 dev->ibdev.uverbs_cmd_mask |=
                      OCRDMA_UVERBS(CREATE_SRQ) |
                      OCRDMA_UVERBS(MODIFY_SRQ) |
diff --git a/drivers/infiniband/hw/ocrdma/ocrdma_sli.h b/drivers/infiniband/hw/ocrdma/ocrdma_sli.h
index e71685a7ffae..de4ebfc4e0e2 100644
--- a/drivers/infiniband/hw/ocrdma/ocrdma_sli.h
+++ b/drivers/infiniband/hw/ocrdma/ocrdma_sli.h
@@ -30,8 +30,16 @@
 
 #define Bit(_b) (1 << (_b))
 
-#define OCRDMA_GEN1_FAMILY      0xB
-#define OCRDMA_GEN2_FAMILY      0x0F
+enum {
+        OCRDMA_ASIC_GEN_SKH_R = 0x04,
+        OCRDMA_ASIC_GEN_LANCER = 0x0B
+};
+
+enum {
+        OCRDMA_ASIC_REV_A0 = 0x00,
+        OCRDMA_ASIC_REV_B0 = 0x10,
+        OCRDMA_ASIC_REV_C0 = 0x20
+};
 
 #define OCRDMA_SUBSYS_ROCE 10
 enum {
@@ -141,6 +149,11 @@ enum {
 #define OCRDMA_MIN_Q_PAGE_SIZE (4096)
 #define OCRDMA_MAX_Q_PAGES     (8)
 
+#define OCRDMA_SLI_ASIC_ID_OFFSET      0x9C
+#define OCRDMA_SLI_ASIC_REV_MASK       0x000000FF
+#define OCRDMA_SLI_ASIC_GEN_NUM_MASK   0x0000FF00
+#define OCRDMA_SLI_ASIC_GEN_NUM_SHIFT  0x08
+
 /*
 # 0: 4K Bytes
 # 1: 8K Bytes
diff --git a/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c b/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c
index be75d2b1ea9f..c5b40583f1ae 100644
--- a/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c
+++ b/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c
@@ -267,7 +267,7 @@ static struct ocrdma_pd *_ocrdma_alloc_pd(struct ocrdma_dev *dev,
 
         if (udata && uctx) {
                 pd->dpp_enabled =
-                        dev->nic_info.dev_family == OCRDMA_GEN2_FAMILY;
+                        ocrdma_get_asic_type(dev) == OCRDMA_ASIC_GEN_SKH_R;
                 pd->num_dpp_qp =
                         pd->dpp_enabled ? OCRDMA_PD_MAX_DPP_ENABLED_QP : 0;
         }
@@ -1161,7 +1161,7 @@ err:
 static void ocrdma_set_qp_db(struct ocrdma_dev *dev, struct ocrdma_qp *qp,
                              struct ocrdma_pd *pd)
 {
-        if (dev->nic_info.dev_family == OCRDMA_GEN2_FAMILY) {
+        if (ocrdma_get_asic_type(dev) == OCRDMA_ASIC_GEN_SKH_R) {
                 qp->sq_db = dev->nic_info.db +
                         (pd->id * dev->nic_info.db_page_size) +
                         OCRDMA_DB_GEN2_SQ_OFFSET;
@@ -1688,7 +1688,7 @@ static int ocrdma_copy_srq_uresp(struct ocrdma_dev *dev, struct ocrdma_srq *srq,
             (srq->pd->id * dev->nic_info.db_page_size);
         uresp.db_page_size = dev->nic_info.db_page_size;
         uresp.num_rqe_allocated = srq->rq.max_cnt;
-        if (dev->nic_info.dev_family == OCRDMA_GEN2_FAMILY) {
+        if (ocrdma_get_asic_type(dev) == OCRDMA_ASIC_GEN_SKH_R) {
                 uresp.db_rq_offset = OCRDMA_DB_GEN2_RQ_OFFSET;
                 uresp.db_shift = 24;
         } else {