[PATCH v4 01/47] net/bnxt: tf_core: fix wc tcam multi slice delete issue

[Sriharsha Basavapatna <sriharsha.basavapatna@broadcom.com>]

From: Shahaji Bhosle <sbhosle@broadcom.com>

FW tries to update the HWRM request data in the
delete case to update the mode bit and also
update invalid profile id. This update only
happens when the data is send over DMA. HWRM
requests are read only buffers and cannot be
updated. So driver now will always send WC
tcam set message over DMA channel.

Update tunnel alloc apis to provide error message.

Fixes: ca5e61bd562d ("net/bnxt: support EM and TCAM lookup with table scope")
Reviewed-by: Randy Schacher <stuart.schacher@broadcom.com>
Reviewed-by: Kishore Padmanabha <kishore.padmanabha@broadcom.com>
Signed-off-by: Shahaji Bhosle <sbhosle@broadcom.com>
Signed-off-by: Sriharsha Basavapatna <sriharsha.basavapatna@broadcom.com>
Reviewed-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
---
 drivers/net/bnxt/tf_core/tf_msg.c          | 28 +++++++++++-----------
 drivers/net/bnxt/tf_ulp/bnxt_tf_pmd_shim.c | 18 ++++++++++++--
 2 files changed, 30 insertions(+), 16 deletions(-)

diff --git a/drivers/net/bnxt/tf_core/tf_msg.c b/drivers/net/bnxt/tf_core/tf_msg.c
index 1c66c7e01a..4aa90f6b07 100644
--- a/drivers/net/bnxt/tf_core/tf_msg.c
+++ b/drivers/net/bnxt/tf_core/tf_msg.c
@@ -1612,20 +1612,20 @@ tf_msg_tcam_entry_set(struct tf *tfp,
 	req.result_size = parms->result_size;
 	data_size = 2 * req.key_size + req.result_size;
 
-	if (data_size <= TF_PCI_BUF_SIZE_MAX) {
-		/* use pci buffer */
-		data = &req.dev_data[0];
-	} else {
-		/* use dma buffer */
-		req.flags |= HWRM_TF_TCAM_SET_INPUT_FLAGS_DMA;
-		rc = tf_msg_alloc_dma_buf(&buf, data_size);
-		if (rc)
-			goto cleanup;
-		data = buf.va_addr;
-		tfp_memcpy(&req.dev_data[0],
-			   &buf.pa_addr,
-			   sizeof(buf.pa_addr));
-	}
+	/*
+	 * Always use dma buffer, as the delete multi slice
+	 * tcam entries not support with HWRM request buffer
+	 * only DMA'ed buffer can update the mode bits for
+	 * the delete to work
+	 */
+	req.flags |= HWRM_TF_TCAM_SET_INPUT_FLAGS_DMA;
+	rc = tf_msg_alloc_dma_buf(&buf, data_size);
+	if (rc)
+		goto cleanup;
+	data = buf.va_addr;
+	tfp_memcpy(&req.dev_data[0],
+		   &buf.pa_addr,
+		   sizeof(buf.pa_addr));
 
 	tfp_memcpy(&data[0], parms->key, parms->key_size);
 	tfp_memcpy(&data[parms->key_size], parms->mask, parms->key_size);
diff --git a/drivers/net/bnxt/tf_ulp/bnxt_tf_pmd_shim.c b/drivers/net/bnxt/tf_ulp/bnxt_tf_pmd_shim.c
index 96d61c3ed2..7e4952c062 100644
--- a/drivers/net/bnxt/tf_ulp/bnxt_tf_pmd_shim.c
+++ b/drivers/net/bnxt/tf_ulp/bnxt_tf_pmd_shim.c
@@ -32,9 +32,17 @@ bnxt_tunnel_dst_port_alloc(struct bnxt *bp,
 			   uint16_t port,
 			   uint8_t type)
 {
-	return bnxt_hwrm_tunnel_dst_port_alloc(bp,
+	int rc = 0;
+	rc = bnxt_hwrm_tunnel_dst_port_alloc(bp,
 					       port,
 					       type);
+	if (rc) {
+		PMD_DRV_LOG(ERR, "Tunnel type:%d alloc failed for port:%d error:%s\n",
+			    type, port,
+			    (rc == HWRM_TUNNEL_DST_PORT_ALLOC_OUTPUT_ERROR_INFO_ERR_ALLOCATED) ?
+			    "already allocated" : "no resource");
+	}
+	return rc;
 }
 
 int
@@ -589,7 +597,13 @@ bnxt_pmd_global_tunnel_set(uint16_t port_id, uint8_t type,
 		}
 
 		rc = bnxt_hwrm_tunnel_dst_port_alloc(bp, udp_port, hwtype);
-		if (!rc) {
+		if (rc) {
+			PMD_DRV_LOG(ERR, "Tunnel type:%d alloc failed for port:%d error:%s\n",
+				    hwtype, udp_port,
+				    (rc ==
+				     HWRM_TUNNEL_DST_PORT_ALLOC_OUTPUT_ERROR_INFO_ERR_ALLOCATED) ?
+				    "already allocated" : "no resource");
+		} else {
 			ulp_global_tunnel_db[type].ref_cnt++;
 			ulp_global_tunnel_db[type].dport = udp_port;
 			bnxt_pmd_global_reg_data_to_hndl(port_id, bp->ecpri_upar_in_use,
-- 
2.39.3