[dpdk-dev] [PATCH 08/20] net/bnxt: cleanup and refactoring

[Somnath Kotur <somnath.kotur@broadcom.com>]

From: Kishore Padmanabha <kishore.padmanabha@broadcom.com>

The return value of the function is explicitly ignored
in this case, since scope id may not be valid for internal EM
entries.
Additional minor refactoring and cleanups.

Signed-off-by: Michael Wildt <michael.wildt@broadcom.com>
Signed-off-by: Kishore Padmanabha <kishore.padmanabha@broadcom.com>
Reviewed-by: Randy Schacher <stuart.schacher@broadcom.com>
Reviewed-by: Ajit Kumar Khaparde <ajit.khaparde@broadcom.com>
Signed-off-by: Somnath Kotur <somnath.kotur@broadcom.com>
---
 drivers/net/bnxt/tf_core/tf_em_host.c |  2 +-
 drivers/net/bnxt/tf_core/tf_msg.c     | 75 +++++++++++++++++++++++++++++++++--
 drivers/net/bnxt/tf_core/tf_session.c |  8 ++++
 drivers/net/bnxt/tf_ulp/bnxt_ulp.c    |  2 +-
 drivers/net/bnxt/tf_ulp/ulp_mapper.c  |  4 +-
 5 files changed, 84 insertions(+), 7 deletions(-)

diff --git a/drivers/net/bnxt/tf_core/tf_em_host.c b/drivers/net/bnxt/tf_core/tf_em_host.c
index 8cc92c4..24287c0 100644
--- a/drivers/net/bnxt/tf_core/tf_em_host.c
+++ b/drivers/net/bnxt/tf_core/tf_em_host.c
@@ -333,7 +333,7 @@ tf_em_ctx_reg(struct tf *tfp,
 {
 	struct hcapi_cfa_em_ctx_mem_info *ctxp = &tbl_scope_cb->em_ctx_info[dir];
 	struct hcapi_cfa_em_table *tbl;
-	int rc;
+	int rc = 0;
 	int i;
 
 	for (i = TF_KEY0_TABLE; i < TF_MAX_TABLE; i++) {
diff --git a/drivers/net/bnxt/tf_core/tf_msg.c b/drivers/net/bnxt/tf_core/tf_msg.c
index 77c9659..1e14d92 100644
--- a/drivers/net/bnxt/tf_core/tf_msg.c
+++ b/drivers/net/bnxt/tf_core/tf_msg.c
@@ -3,6 +3,7 @@
  * All rights reserved.
  */
 
+#include <assert.h>
 #include <inttypes.h>
 #include <stdbool.h>
 #include <stdlib.h>
@@ -21,6 +22,40 @@
 /* Logging defines */
 #define TF_RM_MSG_DEBUG  0
 
+/* Specific msg size defines as we cannot use defines in tf.yaml. This
+ * means we have to manually sync hwrm with these defines if the
+ * tf.yaml changes.
+ */
+#define TF_MSG_SET_GLOBAL_CFG_DATA_SIZE  16
+#define TF_MSG_EM_INSERT_KEY_SIZE        8
+#define TF_MSG_TCAM_SET_DEV_DATA_SIZE    88
+#define TF_MSG_TBL_TYPE_SET_DATA_SIZE    88
+
+/* Compile check - Catch any msg changes that we depend on, like the
+ * defines listed above for array size checking.
+ *
+ * Checking array size is dangerous in that the type could change and
+ * we wouldn't be able to catch it. Thus we check if the complete msg
+ * changed instead. Best we can do.
+ *
+ * If failure is observed then both msg size (defines below) and the
+ * array size (define above) should be checked and compared.
+ */
+#define TF_MSG_SIZE_HWRM_TF_GLOBAL_CFG_SET 56
+static_assert(sizeof(struct hwrm_tf_global_cfg_set_input) ==
+	      TF_MSG_SIZE_HWRM_TF_GLOBAL_CFG_SET,
+	      "HWRM message size changed: hwrm_tf_global_cfg_set_input");
+
+#define TF_MSG_SIZE_HWRM_TF_EM_INSERT      104
+static_assert(sizeof(struct hwrm_tf_em_insert_input) ==
+	      TF_MSG_SIZE_HWRM_TF_EM_INSERT,
+	      "HWRM message size changed: hwrm_tf_em_insert_input");
+
+#define TF_MSG_SIZE_HWRM_TF_TBL_TYPE_SET   128
+static_assert(sizeof(struct hwrm_tf_tbl_type_set_input) ==
+	      TF_MSG_SIZE_HWRM_TF_TBL_TYPE_SET,
+	      "HWRM message size changed: hwrm_tf_tbl_type_set_input");
+
 /**
  * This is the MAX data we can transport across regular HWRM
  */
@@ -321,7 +356,7 @@ tf_msg_session_resc_qcaps(struct tf *tfp,
 		TFP_DRV_LOG(ERR,
 			    "%s: QCAPS message size error, rc:%s\n",
 			    tf_dir_2_str(dir),
-			    strerror(-EINVAL));
+			    strerror(EINVAL));
 		rc = -EINVAL;
 		goto cleanup;
 	}
@@ -436,7 +471,7 @@ tf_msg_session_resc_alloc(struct tf *tfp,
 		TFP_DRV_LOG(ERR,
 			    "%s: Alloc message size error, rc:%s\n",
 			    tf_dir_2_str(dir),
-			    strerror(-EINVAL));
+			    strerror(EINVAL));
 		rc = -EINVAL;
 		goto cleanup;
 	}
@@ -546,6 +581,7 @@ tf_msg_insert_em_internal_entry(struct tf *tfp,
 		(struct tf_em_64b_entry *)em_parms->em_record;
 	uint16_t flags;
 	uint8_t fw_session_id;
+	uint8_t msg_key_size;
 
 	rc = tf_session_get_fw_session_id(tfp, &fw_session_id);
 	if (rc) {
@@ -558,9 +594,21 @@ tf_msg_insert_em_internal_entry(struct tf *tfp,
 
 	/* Populate the request */
 	req.fw_session_id = tfp_cpu_to_le_32(fw_session_id);
+
+	/* Check for key size conformity */
+	msg_key_size = (em_parms->key_sz_in_bits + 7) / 8;
+	if (msg_key_size > TF_MSG_EM_INSERT_KEY_SIZE) {
+		rc = -EINVAL;
+		TFP_DRV_LOG(ERR,
+			    "%s: Invalid parameters for msg type, rc:%s\n",
+			    tf_dir_2_str(em_parms->dir),
+			    strerror(-rc));
+		return rc;
+	}
+
 	tfp_memcpy(req.em_key,
 		   em_parms->key,
-		   ((em_parms->key_sz_in_bits + 7) / 8));
+		   msg_key_size);
 
 	flags = (em_parms->dir == TF_DIR_TX ?
 		 HWRM_TF_EM_INSERT_INPUT_FLAGS_DIR_TX :
@@ -942,6 +990,16 @@ tf_msg_set_tbl_entry(struct tf *tfp,
 	req.size = tfp_cpu_to_le_16(size);
 	req.index = tfp_cpu_to_le_32(index);
 
+	/* Check for data size conformity */
+	if (size > TF_MSG_TBL_TYPE_SET_DATA_SIZE) {
+		rc = -EINVAL;
+		TFP_DRV_LOG(ERR,
+			    "%s: Invalid parameters for msg type, rc:%s\n",
+			    tf_dir_2_str(dir),
+			    strerror(-rc));
+		return rc;
+	}
+
 	tfp_memcpy(&req.data,
 		   data,
 		   size);
@@ -1102,6 +1160,17 @@ tf_msg_set_global_cfg(struct tf *tfp,
 	req.flags = tfp_cpu_to_le_32(flags);
 	req.type = tfp_cpu_to_le_32(params->type);
 	req.offset = tfp_cpu_to_le_32(params->offset);
+
+	/* Check for data size conformity */
+	if (params->config_sz_in_bytes > TF_MSG_SET_GLOBAL_CFG_DATA_SIZE) {
+		rc = -EINVAL;
+		TFP_DRV_LOG(ERR,
+			    "%s: Invalid parameters for msg type, rc:%s\n",
+			    tf_dir_2_str(params->dir),
+			    strerror(-rc));
+		return rc;
+	}
+
 	tfp_memcpy(req.data, params->config,
 		   params->config_sz_in_bytes);
 	req.size = tfp_cpu_to_le_32(params->config_sz_in_bytes);
diff --git a/drivers/net/bnxt/tf_core/tf_session.c b/drivers/net/bnxt/tf_core/tf_session.c
index 932a14a..ca46f9b 100644
--- a/drivers/net/bnxt/tf_core/tf_session.c
+++ b/drivers/net/bnxt/tf_core/tf_session.c
@@ -472,6 +472,14 @@ tf_session_close_session(struct tf *tfp,
 
 	client = tf_session_find_session_client_by_fid(tfs,
 						       fid);
+	if (!client) {
+		rc = -EINVAL;
+		TFP_DRV_LOG(ERR,
+			    "Client not part of the session, unable to close, rc:%s\n",
+			    strerror(-rc));
+		return rc;
+	}
+
 	/* In case multiple clients we chose to close those first */
 	if (tfs->ref_count > 1) {
 		/* Linaro gcc can't static init this structure */
diff --git a/drivers/net/bnxt/tf_ulp/bnxt_ulp.c b/drivers/net/bnxt/tf_ulp/bnxt_ulp.c
index fc29ff1..469ad36 100644
--- a/drivers/net/bnxt/tf_ulp/bnxt_ulp.c
+++ b/drivers/net/bnxt/tf_ulp/bnxt_ulp.c
@@ -594,7 +594,7 @@ bnxt_ulp_init(struct bnxt *bp)
 	int rc;
 
 	if (bp->ulp_ctx) {
-		BNXT_TF_DBG(ERR, "ulp ctx already allocated\n");
+		BNXT_TF_DBG(DEBUG, "ulp ctx already allocated\n");
 		return -EINVAL;
 	}
 
diff --git a/drivers/net/bnxt/tf_ulp/ulp_mapper.c b/drivers/net/bnxt/tf_ulp/ulp_mapper.c
index b0d31a8..dd99ea3 100644
--- a/drivers/net/bnxt/tf_ulp/ulp_mapper.c
+++ b/drivers/net/bnxt/tf_ulp/ulp_mapper.c
@@ -537,10 +537,10 @@ ulp_mapper_index_entry_free(struct bnxt_ulp_context *ulp,
 	};
 
 	/*
-	 * Just set the table scope, it will be ignored if not necessary
+	 * Just get the table scope, it will be ignored if not necessary
 	 * by the tf_free_tbl_entry
 	 */
-	bnxt_ulp_cntxt_tbl_scope_id_get(ulp, &fparms.tbl_scope_id);
+	(void)bnxt_ulp_cntxt_tbl_scope_id_get(ulp, &fparms.tbl_scope_id);
 
 	return tf_free_tbl_entry(tfp, &fparms);
 }
-- 
2.7.4