RDMA/bnxt_re: Add 64bit doorbells for 57500 series

The new chip series has 64 bit doorbell for notification queues. Thus,
both control and data path event queues need new routines to write 64 bit
doorbell. Adding the same. There is new doorbell interface between the
chip and driver. Changing the chip specific data structure definitions.

Additional significant changes are listed below
- bnxt_re_net_ring_free/alloc takes a new argument
- bnxt_qplib_enable_nq and enable_rcfw uses new doorbell offset
  for new chip.
- DB mapping for NQ and CREQ now maps 8 bytes.
- DBR_DBR_* macros renames to DBC_DBC_*
- store nq_db_offset in a 32bit data type.
- got rid of __iowrite64_copy, used writeq instead.
- changed the DB header initialization to simpler scheme.

Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: Devesh Sharma <devesh.sharma@broadcom.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

1 files changed, 21 insertions, 10 deletions

diff --git a/drivers/infiniband/hw/bnxt_re/qplib_rcfw.c b/drivers/infiniband/hw/bnxt_re/qplib_rcfw.c
index 65e17de220f6..9c000245a6de 100644
--- a/drivers/infiniband/hw/bnxt_re/qplib_rcfw.c
+++ b/drivers/infiniband/hw/bnxt_re/qplib_rcfw.c
@@ -359,11 +359,12 @@ static int bnxt_qplib_process_qp_event(struct bnxt_qplib_rcfw *rcfw,
 static void bnxt_qplib_service_creq(unsigned long data)
 {
 	struct bnxt_qplib_rcfw *rcfw = (struct bnxt_qplib_rcfw *)data;
+	bool gen_p5 = bnxt_qplib_is_chip_gen_p5(rcfw->res->cctx);
 	struct bnxt_qplib_hwq *creq = &rcfw->creq;
+	u32 type, budget = CREQ_ENTRY_POLL_BUDGET;
 	struct creq_base *creqe, **creq_ptr;
 	u32 sw_cons, raw_cons;
 	unsigned long flags;
-	u32 type, budget = CREQ_ENTRY_POLL_BUDGET;
 
 	/* Service the CREQ until budget is over */
 	spin_lock_irqsave(&creq->lock, flags);
@@ -407,8 +408,9 @@ static void bnxt_qplib_service_creq(unsigned long data)
 
 	if (creq->cons != raw_cons) {
 		creq->cons = raw_cons;
-		CREQ_DB_REARM(rcfw->creq_bar_reg_iomem, raw_cons,
-			      creq->max_elements);
+		bnxt_qplib_ring_creq_db_rearm(rcfw->creq_bar_reg_iomem,
+					      raw_cons, creq->max_elements,
+					      rcfw->creq_ring_id, gen_p5);
 	}
 	spin_unlock_irqrestore(&creq->lock, flags);
 }
@@ -560,12 +562,15 @@ int bnxt_qplib_alloc_rcfw_channel(struct pci_dev *pdev,
 				  struct bnxt_qplib_ctx *ctx,
 				  int qp_tbl_sz)
 {
+	u8 hwq_type;
+
 	rcfw->pdev = pdev;
 	rcfw->creq.max_elements = BNXT_QPLIB_CREQE_MAX_CNT;
+	hwq_type = bnxt_qplib_get_hwq_type(rcfw->res);
 	if (bnxt_qplib_alloc_init_hwq(rcfw->pdev, &rcfw->creq, NULL, 0,
 				      &rcfw->creq.max_elements,
-				      BNXT_QPLIB_CREQE_UNITS, 0, PAGE_SIZE,
-				      HWQ_TYPE_L2_CMPL)) {
+				      BNXT_QPLIB_CREQE_UNITS,
+				      0, PAGE_SIZE, hwq_type)) {
 		dev_err(&rcfw->pdev->dev,
 			"HW channel CREQ allocation failed\n");
 		goto fail;
@@ -607,10 +612,13 @@ fail:
 
 void bnxt_qplib_rcfw_stop_irq(struct bnxt_qplib_rcfw *rcfw, bool kill)
 {
+	bool gen_p5 = bnxt_qplib_is_chip_gen_p5(rcfw->res->cctx);
+
 	tasklet_disable(&rcfw->worker);
 	/* Mask h/w interrupts */
-	CREQ_DB(rcfw->creq_bar_reg_iomem, rcfw->creq.cons,
-		rcfw->creq.max_elements);
+	bnxt_qplib_ring_creq_db(rcfw->creq_bar_reg_iomem, rcfw->creq.cons,
+				rcfw->creq.max_elements, rcfw->creq_ring_id,
+				gen_p5);
 	/* Sync with last running IRQ-handler */
 	synchronize_irq(rcfw->vector);
 	if (kill)
@@ -647,6 +655,7 @@ void bnxt_qplib_disable_rcfw_channel(struct bnxt_qplib_rcfw *rcfw)
 int bnxt_qplib_rcfw_start_irq(struct bnxt_qplib_rcfw *rcfw, int msix_vector,
 			      bool need_init)
 {
+	bool gen_p5 = bnxt_qplib_is_chip_gen_p5(rcfw->res->cctx);
 	int rc;
 
 	if (rcfw->requested)
@@ -663,8 +672,9 @@ int bnxt_qplib_rcfw_start_irq(struct bnxt_qplib_rcfw *rcfw, int msix_vector,
 	if (rc)
 		return rc;
 	rcfw->requested = true;
-	CREQ_DB_REARM(rcfw->creq_bar_reg_iomem, rcfw->creq.cons,
-		      rcfw->creq.max_elements);
+	bnxt_qplib_ring_creq_db_rearm(rcfw->creq_bar_reg_iomem,
+				      rcfw->creq.cons, rcfw->creq.max_elements,
+				      rcfw->creq_ring_id, gen_p5);
 
 	return 0;
 }
@@ -717,8 +727,9 @@ int bnxt_qplib_enable_rcfw_channel(struct pci_dev *pdev,
 		dev_err(&rcfw->pdev->dev,
 			"CREQ BAR region %d resc start is 0!\n",
 			rcfw->creq_bar_reg);
+	/* Unconditionally map 8 bytes to support 57500 series */
 	rcfw->creq_bar_reg_iomem = ioremap_nocache(res_base + cp_bar_reg_off,
-						   4);
+						   8);
 	if (!rcfw->creq_bar_reg_iomem) {
 		dev_err(&rcfw->pdev->dev, "CREQ BAR region %d mapping failed\n",
 			rcfw->creq_bar_reg);