net/bnxt: free statistics context

Add function and associated structures and definitions to free
statistics context from the ASIC.

New HWRM call:
bnxt_hwrm_stat_ctx_free
	This command is used to free a stat context.

Signed-off-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
Signed-off-by: Stephen Hurd <stephen.hurd@broadcom.com>
Reviewed-by: David Christensen <david.christensen@broadcom.com>

drivers/net/bnxt/bnxt_hwrm.c

@@ -742,6 +742,28 @@ int bnxt_hwrm_stat_ctx_alloc(struct bnxt *bp,
 	return rc;
 }
 
+int bnxt_hwrm_stat_ctx_free(struct bnxt *bp,
+			    struct bnxt_cp_ring_info *cpr, unsigned int idx)
+{
+	int rc;
+	struct hwrm_stat_ctx_free_input req = {.req_type = 0 };
+	struct hwrm_stat_ctx_free_output *resp = bp->hwrm_cmd_resp_addr;
+
+	HWRM_PREP(req, STAT_CTX_FREE, -1, resp);
+
+	req.stat_ctx_id = rte_cpu_to_le_16(cpr->hw_stats_ctx_id);
+	req.seq_id = rte_cpu_to_le_16(bp->hwrm_cmd_seq++);
+
+	rc = bnxt_hwrm_send_message(bp, &req, sizeof(req));
+
+	HWRM_CHECK_RESULT;
+
+	cpr->hw_stats_ctx_id = HWRM_NA_SIGNATURE;
+	bp->grp_info[idx].fw_stats_ctx = cpr->hw_stats_ctx_id;
+
+	return rc;
+}
+
 int bnxt_hwrm_vnic_alloc(struct bnxt *bp, struct bnxt_vnic_info *vnic)
 {
 	int rc = 0, i, j;
@@ -918,6 +940,28 @@ int bnxt_clear_all_hwrm_stat_ctxs(struct bnxt *bp)
 	return 0;
 }
 
+int bnxt_free_all_hwrm_stat_ctxs(struct bnxt *bp)
+{
+	int rc;
+	unsigned int i;
+	struct bnxt_cp_ring_info *cpr;
+
+	for (i = 0; i < bp->rx_cp_nr_rings + bp->tx_cp_nr_rings; i++) {
+		unsigned int idx = i + 1;
+
+		if (i >= bp->rx_cp_nr_rings)
+			cpr = bp->tx_queues[i - bp->rx_cp_nr_rings]->cp_ring;
+		else
+			cpr = bp->rx_queues[i]->cp_ring;
+		if (cpr->hw_stats_ctx_id != HWRM_NA_SIGNATURE) {
+			rc = bnxt_hwrm_stat_ctx_free(bp, cpr, idx);
+			if (rc)
+				return rc;
+		}
+	}
+	return 0;
+}
+
 int bnxt_alloc_all_hwrm_stat_ctxs(struct bnxt *bp)
 {
 	unsigned int i;

drivers/net/bnxt/bnxt_hwrm.h

@@ -74,6 +74,8 @@ int bnxt_hwrm_ring_grp_free(struct bnxt *bp, unsigned int idx);
 int bnxt_hwrm_stat_clear(struct bnxt *bp, struct bnxt_cp_ring_info *cpr);
 int bnxt_hwrm_stat_ctx_alloc(struct bnxt *bp,
 			     struct bnxt_cp_ring_info *cpr, unsigned int idx);
+int bnxt_hwrm_stat_ctx_free(struct bnxt *bp,
+			    struct bnxt_cp_ring_info *cpr, unsigned int idx);
 
 int bnxt_hwrm_ver_get(struct bnxt *bp);
 
@@ -87,6 +89,7 @@ int bnxt_hwrm_vnic_rss_cfg(struct bnxt *bp,
 
 int bnxt_alloc_all_hwrm_stat_ctxs(struct bnxt *bp);
 int bnxt_clear_all_hwrm_stat_ctxs(struct bnxt *bp);
+int bnxt_free_all_hwrm_stat_ctxs(struct bnxt *bp);
 int bnxt_free_all_hwrm_ring_grps(struct bnxt *bp);
 int bnxt_alloc_all_hwrm_ring_grps(struct bnxt *bp);
 void bnxt_free_hwrm_resources(struct bnxt *bp);

drivers/net/bnxt/hsi_struct_def_dpdk.h

@@ -104,6 +104,7 @@ struct ctx_hw_stats64 {
 #define HWRM_CFA_L2_FILTER_CFG		(UINT32_C(0x92))
 #define HWRM_CFA_L2_SET_RX_MASK		(UINT32_C(0x93))
 #define HWRM_STAT_CTX_ALLOC		(UINT32_C(0xb0))
+#define HWRM_STAT_CTX_FREE		(UINT32_C(0xb1))
 #define HWRM_STAT_CTX_CLR_STATS		(UINT32_C(0xb3))
 #define HWRM_EXEC_FWD_RESP		(UINT32_C(0xd0))
 
@@ -3839,6 +3840,86 @@ struct hwrm_stat_ctx_clr_stats_output {
 	uint8_t valid;
 } __attribute__((packed));
 
+/* hwrm_stat_ctx_free */
+/* Description: This command is used to free a stat context. */
+/* Input (24 bytes) */
+
+struct hwrm_stat_ctx_free_input {
+	/*
+	 * This value indicates what type of request this is. The format for the
+	 * rest of the command is determined by this field.
+	 */
+	uint16_t req_type;
+
+	/*
+	 * This value indicates the what completion ring the request will be
+	 * optionally completed on. If the value is -1, then no CR completion
+	 * will be generated. Any other value must be a valid CR ring_id value
+	 * for this function.
+	 */
+	uint16_t cmpl_ring;
+
+	/* This value indicates the command sequence number. */
+	uint16_t seq_id;
+
+	/*
+	 * Target ID of this command. 0x0 - 0xFFF8 - Used for function ids
+	 * 0xFFF8 - 0xFFFE - Reserved for internal processors 0xFFFF - HWRM
+	 */
+	uint16_t target_id;
+
+	/*
+	 * This is the host address where the response will be written when the
+	 * request is complete. This area must be 16B aligned and must be
+	 * cleared to zero before the request is made.
+	 */
+	uint64_t resp_addr;
+
+	/* ID of the statistics context that is being queried. */
+	uint32_t stat_ctx_id;
+
+	uint32_t unused_0;
+} __attribute__((packed));
+
+/* Output (16 bytes) */
+
+struct hwrm_stat_ctx_free_output {
+	/*
+	 * Pass/Fail or error type Note: receiver to verify the in parameters,
+	 * and fail the call with an error when appropriate
+	 */
+	uint16_t error_code;
+
+	/* This field returns the type of original request. */
+	uint16_t req_type;
+
+	/* This field provides original sequence number of the command. */
+	uint16_t seq_id;
+
+	/*
+	 * This field is the length of the response in bytes. The last byte of
+	 * the response is a valid flag that will read as '1' when the command
+	 * has been completely written to memory.
+	 */
+	uint16_t resp_len;
+
+	/* This is the statistics context ID value. */
+	uint32_t stat_ctx_id;
+
+	uint8_t unused_0;
+	uint8_t unused_1;
+	uint8_t unused_2;
+
+	/*
+	 * This field is used in Output records to indicate that the output is
+	 * completely written to RAM. This field should be read as '1' to
+	 * indicate that the output has been completely written. When writing a
+	 * command completion or response to an internal processor, the order of
+	 * writes has to be such that this field is written last.
+	 */
+	uint8_t valid;
+} __attribute__((packed));
+
 /* hwrm_vnic_alloc */
 /*
  * Description: This VNIC is a resource in the RX side of the chip that is used