bnxt_en: Allocate backing store memory for FW trace logs

Allocate the new FW trace log backing store context memory types
if they are supported by the FW.  FW debug logs are DMA'ed to the host
backing store memory when the on-chip buffers are full.  If host
memory cannot be allocated for these memory types, the driver
will not abort.

Reviewed-by: Hongguang Gao <[email protected]>
Signed-off-by: Shruti Parab <[email protected]>
Signed-off-by: Michael Chan <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

Author: Shruti Parab

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

@@ -2461,6 +2461,15 @@ static bool bnxt_auto_speed_updated(struct bnxt_link_info *link_info)
 	return false;
 }
 
+bool bnxt_bs_trace_avail(struct bnxt *bp, u16 type)
+{
+	u32 flags = bp->ctx->ctx_arr[type].flags;
+
+	return (flags & BNXT_CTX_MEM_TYPE_VALID) &&
+		((flags & BNXT_CTX_MEM_FW_TRACE) ||
+		 (flags & BNXT_CTX_MEM_FW_BIN_TRACE));
+}
+
 #define BNXT_EVENT_THERMAL_CURRENT_TEMP(data2)				\
 	((data2) &							\
 	  ASYNC_EVENT_CMPL_ERROR_REPORT_THERMAL_EVENT_DATA2_CURRENT_TEMP_MASK)
@@ -8744,16 +8753,34 @@ static int bnxt_backing_store_cfg_v2(struct bnxt *bp, u32 ena)
 {
 	struct bnxt_ctx_mem_info *ctx = bp->ctx;
 	struct bnxt_ctx_mem_type *ctxm;
-	u16 last_type;
+	u16 last_type = BNXT_CTX_INV;
 	int rc = 0;
 	u16 type;
 
-	if (!ena)
-		return 0;
-	else if (ena & FUNC_BACKING_STORE_CFG_REQ_ENABLES_TIM)
-		last_type = BNXT_CTX_MAX - 1;
-	else
-		last_type = BNXT_CTX_L2_MAX - 1;
+	for (type = BNXT_CTX_SRT; type <= BNXT_CTX_RIGP1; type++) {
+		ctxm = &ctx->ctx_arr[type];
+		if (!bnxt_bs_trace_avail(bp, type))
+			continue;
+		if (!ctxm->mem_valid) {
+			rc = bnxt_setup_ctxm_pg_tbls(bp, ctxm,
+						     ctxm->max_entries, 1);
+			if (rc) {
+				netdev_warn(bp->dev, "Unable to setup ctx page for type:0x%x.\n",
+					    type);
+				continue;
+			}
+			last_type = type;
+		}
+	}
+
+	if (last_type == BNXT_CTX_INV) {
+		if (!ena)
+			return 0;
+		else if (ena & FUNC_BACKING_STORE_CFG_REQ_ENABLES_TIM)
+			last_type = BNXT_CTX_MAX - 1;
+		else
+			last_type = BNXT_CTX_L2_MAX - 1;
+	}
 	ctx->ctx_arr[last_type].last = 1;
 
 	for (type = 0 ; type < BNXT_CTX_V2_MAX; type++) {
@@ -8776,7 +8803,7 @@ static void bnxt_free_one_ctx_mem(struct bnxt *bp,
 
 	ctxm->last = 0;
 
-	if (ctxm->mem_valid && !force)
+	if (ctxm->mem_valid && !force && (ctxm->flags & BNXT_CTX_MEM_PERSIST))
 		return;
 
 	ctx_pg = ctxm->pg_info;

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

@@ -1881,6 +1881,13 @@ struct bnxt_ctx_mem_type {
 	u16	entry_size;
 	u32	flags;
 #define BNXT_CTX_MEM_TYPE_VALID FUNC_BACKING_STORE_QCAPS_V2_RESP_FLAGS_TYPE_VALID
+#define BNXT_CTX_MEM_FW_TRACE		\
+	FUNC_BACKING_STORE_QCAPS_V2_RESP_FLAGS_FW_DBG_TRACE
+#define BNXT_CTX_MEM_FW_BIN_TRACE	\
+	FUNC_BACKING_STORE_QCAPS_V2_RESP_FLAGS_FW_BIN_DBG_TRACE
+#define BNXT_CTX_MEM_PERSIST		\
+	FUNC_BACKING_STORE_QCAPS_V2_RESP_FLAGS_NEXT_BS_OFFSET
+
 	u32	instance_bmap;
 	u8	init_value;
 	u8	entry_multiple;
@@ -1921,21 +1928,30 @@ struct bnxt_ctx_mem_type {
 #define BNXT_CTX_FTQM	FUNC_BACKING_STORE_QCAPS_V2_REQ_TYPE_FP_TQM_RING
 #define BNXT_CTX_MRAV	FUNC_BACKING_STORE_QCAPS_V2_REQ_TYPE_MRAV
 #define BNXT_CTX_TIM	FUNC_BACKING_STORE_QCAPS_V2_REQ_TYPE_TIM
-#define BNXT_CTX_TKC	FUNC_BACKING_STORE_QCAPS_V2_REQ_TYPE_TKC
-#define BNXT_CTX_RKC	FUNC_BACKING_STORE_QCAPS_V2_REQ_TYPE_RKC
+#define BNXT_CTX_TCK	FUNC_BACKING_STORE_QCAPS_V2_REQ_TYPE_TX_CK
+#define BNXT_CTX_RCK	FUNC_BACKING_STORE_QCAPS_V2_REQ_TYPE_RX_CK
 #define BNXT_CTX_MTQM	FUNC_BACKING_STORE_QCAPS_V2_REQ_TYPE_MP_TQM_RING
 #define BNXT_CTX_SQDBS	FUNC_BACKING_STORE_QCAPS_V2_REQ_TYPE_SQ_DB_SHADOW
 #define BNXT_CTX_RQDBS	FUNC_BACKING_STORE_QCAPS_V2_REQ_TYPE_RQ_DB_SHADOW
 #define BNXT_CTX_SRQDBS	FUNC_BACKING_STORE_QCAPS_V2_REQ_TYPE_SRQ_DB_SHADOW
 #define BNXT_CTX_CQDBS	FUNC_BACKING_STORE_QCAPS_V2_REQ_TYPE_CQ_DB_SHADOW
-#define BNXT_CTX_QTKC	FUNC_BACKING_STORE_QCAPS_V2_REQ_TYPE_QUIC_TKC
-#define BNXT_CTX_QRKC	FUNC_BACKING_STORE_QCAPS_V2_REQ_TYPE_QUIC_RKC
 #define BNXT_CTX_TBLSC	FUNC_BACKING_STORE_QCAPS_V2_REQ_TYPE_TBL_SCOPE
 #define BNXT_CTX_XPAR	FUNC_BACKING_STORE_QCAPS_V2_REQ_TYPE_XID_PARTITION
+#define BNXT_CTX_SRT	FUNC_BACKING_STORE_QCAPS_V2_REQ_TYPE_SRT_TRACE
+#define BNXT_CTX_SRT2	FUNC_BACKING_STORE_QCAPS_V2_REQ_TYPE_SRT2_TRACE
+#define BNXT_CTX_CRT	FUNC_BACKING_STORE_QCAPS_V2_REQ_TYPE_CRT_TRACE
+#define BNXT_CTX_CRT2	FUNC_BACKING_STORE_QCAPS_V2_REQ_TYPE_CRT2_TRACE
+#define BNXT_CTX_RIGP0	FUNC_BACKING_STORE_QCAPS_V2_REQ_TYPE_RIGP0_TRACE
+#define BNXT_CTX_L2HWRM	FUNC_BACKING_STORE_QCAPS_V2_REQ_TYPE_L2_HWRM_TRACE
+#define BNXT_CTX_REHWRM	FUNC_BACKING_STORE_QCAPS_V2_REQ_TYPE_ROCE_HWRM_TRACE
+#define BNXT_CTX_CA0	FUNC_BACKING_STORE_QCAPS_V2_REQ_TYPE_CA0_TRACE
+#define BNXT_CTX_CA1	FUNC_BACKING_STORE_QCAPS_V2_REQ_TYPE_CA1_TRACE
+#define BNXT_CTX_CA2	FUNC_BACKING_STORE_QCAPS_V2_REQ_TYPE_CA2_TRACE
+#define BNXT_CTX_RIGP1	FUNC_BACKING_STORE_QCAPS_V2_REQ_TYPE_RIGP1_TRACE
 
 #define BNXT_CTX_MAX	(BNXT_CTX_TIM + 1)
 #define BNXT_CTX_L2_MAX	(BNXT_CTX_FTQM + 1)
-#define BNXT_CTX_V2_MAX	(BNXT_CTX_XPAR + 1)
+#define BNXT_CTX_V2_MAX	(BNXT_CTX_RIGP1 + 1)
 #define BNXT_CTX_INV	((u16)-1)
 
 struct bnxt_ctx_mem_info {
@@ -2793,6 +2809,7 @@ int bnxt_alloc_rx_data(struct bnxt *bp, struct bnxt_rx_ring_info *rxr,
 		       u16 prod, gfp_t gfp);
 void bnxt_reuse_rx_data(struct bnxt_rx_ring_info *rxr, u16 cons, void *data);
 u32 bnxt_fw_health_readl(struct bnxt *bp, int reg_idx);
+bool bnxt_bs_trace_avail(struct bnxt *bp, u16 type);
 void bnxt_set_tpa_flags(struct bnxt *bp);
 void bnxt_set_ring_params(struct bnxt *);
 int bnxt_set_rx_skb_mode(struct bnxt *bp, bool page_mode);