bnxt_en: Add support for HWRM_FUNC_BACKING_STORE_CFG_V2 firmware calls

Newer chips starting with 57600 will use this new firmware HWRM call to
configure backing store memory.  Add this new call if it is supported
by the firmware.

Reviewed-by: Hongguang Gao <hongguang.gao@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Link: https://lore.kernel.org/r/20231120234405.194542-9-michael.chan@broadcom.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/broadcom/bnxt/bnxt.c

@@ -7670,6 +7670,71 @@ static int bnxt_setup_ctxm_pg_tbls(struct bnxt *bp,
 	return rc;
 }
 
+static int bnxt_hwrm_func_backing_store_cfg_v2(struct bnxt *bp,
+					       struct bnxt_ctx_mem_type *ctxm,
+					       bool last)
+{
+	struct hwrm_func_backing_store_cfg_v2_input *req;
+	u32 instance_bmap = ctxm->instance_bmap;
+	int i, j, rc = 0, n = 1;
+	__le32 *p;
+
+	if (!(ctxm->flags & BNXT_CTX_MEM_TYPE_VALID) || !ctxm->pg_info)
+		return 0;
+
+	if (instance_bmap)
+		n = hweight32(ctxm->instance_bmap);
+	else
+		instance_bmap = 1;
+
+	rc = hwrm_req_init(bp, req, HWRM_FUNC_BACKING_STORE_CFG_V2);
+	if (rc)
+		return rc;
+	hwrm_req_hold(bp, req);
+	req->type = cpu_to_le16(ctxm->type);
+	req->entry_size = cpu_to_le16(ctxm->entry_size);
+	req->subtype_valid_cnt = ctxm->split_entry_cnt;
+	for (i = 0, p = &req->split_entry_0; i < ctxm->split_entry_cnt; i++)
+		p[i] = cpu_to_le32(ctxm->split[i]);
+	for (i = 0, j = 0; j < n && !rc; i++) {
+		struct bnxt_ctx_pg_info *ctx_pg;
+
+		if (!(instance_bmap & (1 << i)))
+			continue;
+		req->instance = cpu_to_le16(i);
+		ctx_pg = &ctxm->pg_info[j++];
+		if (!ctx_pg->entries)
+			continue;
+		req->num_entries = cpu_to_le32(ctx_pg->entries);
+		bnxt_hwrm_set_pg_attr(&ctx_pg->ring_mem,
+				      &req->page_size_pbl_level,
+				      &req->page_dir);
+		if (last && j == n)
+			req->flags =
+				cpu_to_le32(FUNC_BACKING_STORE_CFG_V2_REQ_FLAGS_BS_CFG_ALL_DONE);
+		rc = hwrm_req_send(bp, req);
+	}
+	hwrm_req_drop(bp, req);
+	return rc;
+}
+
+static int bnxt_backing_store_cfg_v2(struct bnxt *bp)
+{
+	struct bnxt_ctx_mem_info *ctx = bp->ctx;
+	struct bnxt_ctx_mem_type *ctxm;
+	int rc = 0;
+	u16 type;
+
+	for (type = 0 ; type < BNXT_CTX_V2_MAX; type++) {
+		ctxm = &ctx->ctx_arr[type];
+
+		rc = bnxt_hwrm_func_backing_store_cfg_v2(bp, ctxm, ctxm->last);
+		if (rc)
+			return rc;
+	}
+	return 0;
+}
+
 void bnxt_free_ctx_mem(struct bnxt *bp)
 {
 	struct bnxt_ctx_mem_info *ctx = bp->ctx;
@@ -7804,7 +7869,11 @@ static int bnxt_alloc_ctx_mem(struct bnxt *bp)
 	for (i = 0; i < ctx->tqm_fp_rings_count + 1; i++)
 		ena |= FUNC_BACKING_STORE_CFG_REQ_ENABLES_TQM_SP << i;
 	ena |= FUNC_BACKING_STORE_CFG_REQ_DFLT_ENABLES;
-	rc = bnxt_hwrm_func_backing_store_cfg(bp, ena);
+
+	if (bp->fw_cap & BNXT_FW_CAP_BACKING_STORE_V2)
+		rc = bnxt_backing_store_cfg_v2(bp);
+	else
+		rc = bnxt_hwrm_func_backing_store_cfg(bp, ena);
 	if (rc) {
 		netdev_err(bp->dev, "Failed configuring context mem, rc = %d.\n",
 			   rc);

drivers/net/ethernet/broadcom/bnxt/bnxt.h

@@ -1548,6 +1548,7 @@ struct bnxt_ctx_mem_type {
 	u16	type;
 	u16	entry_size;
 	u32	flags;
+#define BNXT_CTX_MEM_TYPE_VALID FUNC_BACKING_STORE_QCAPS_V2_RESP_FLAGS_TYPE_VALID
 	u32	instance_bmap;
 	u8	init_value;
 	u8	entry_multiple;