[dpdk-dev] [PATCH v4 10/34] net/bnxt: add tf core TCAM support

[Venkat Duvvuru <venkatkumar.duvvuru@broadcom.com>]

From: Shahaji Bhosle <sbhosle@broadcom.com>

- Add TruFlow TCAM public API functions
- Add TCAM support functions as well as public APIs.

Signed-off-by: Shahaji Bhosle <sbhosle@broadcom.com>
Signed-off-by: Jay Ding <jay.ding@broadcom.com>
Reviewed-by: Randy Schacher <stuart.schacher@broadcom.com>
Reviewed-by: Ajit Kumar Khaparde <ajit.khaparde@broadcom.com>
---
 drivers/net/bnxt/tf_core/tf_core.c | 163 ++++++++++++++++++++++++++
 drivers/net/bnxt/tf_core/tf_core.h | 227 +++++++++++++++++++++++++++++++++++++
 drivers/net/bnxt/tf_core/tf_msg.c  | 159 ++++++++++++++++++++++++++
 drivers/net/bnxt/tf_core/tf_msg.h  |  30 +++++
 4 files changed, 579 insertions(+)

diff --git a/drivers/net/bnxt/tf_core/tf_core.c b/drivers/net/bnxt/tf_core/tf_core.c
index 7b027f7..39f4a11 100644
--- a/drivers/net/bnxt/tf_core/tf_core.c
+++ b/drivers/net/bnxt/tf_core/tf_core.c
@@ -440,3 +440,166 @@ int tf_free_identifier(struct tf *tfp,
 
 	return 0;
 }
+
+int
+tf_alloc_tcam_entry(struct tf *tfp,
+		    struct tf_alloc_tcam_entry_parms *parms)
+{
+	int rc;
+	int index;
+	struct tf_session *tfs;
+	struct bitalloc *session_pool;
+
+	if (parms == NULL || tfp == NULL)
+		return -EINVAL;
+
+	if (tfp->session == NULL || tfp->session->core_data == NULL) {
+		PMD_DRV_LOG(ERR, "%s: session error\n",
+			    tf_dir_2_str(parms->dir));
+		return -EINVAL;
+	}
+
+	tfs = (struct tf_session *)(tfp->session->core_data);
+
+	rc = tf_rm_lookup_tcam_type_pool(tfs,
+					 parms->dir,
+					 parms->tcam_tbl_type,
+					 &session_pool);
+	/* Error logging handled by tf_rm_lookup_tcam_type_pool */
+	if (rc)
+		return rc;
+
+	index = ba_alloc(session_pool);
+	if (index == BA_FAIL) {
+		PMD_DRV_LOG(ERR, "%s: %s: No resource available\n",
+			    tf_dir_2_str(parms->dir),
+			    tf_tcam_tbl_2_str(parms->tcam_tbl_type));
+		return -ENOMEM;
+	}
+
+	parms->idx = index;
+	return 0;
+}
+
+int
+tf_set_tcam_entry(struct tf *tfp,
+		  struct tf_set_tcam_entry_parms *parms)
+{
+	int rc;
+	int id;
+	struct tf_session *tfs;
+	struct bitalloc *session_pool;
+
+	if (tfp == NULL || parms == NULL) {
+		PMD_DRV_LOG(ERR, "Invalid parameters\n");
+		return -EINVAL;
+	}
+
+	if (tfp->session == NULL || tfp->session->core_data == NULL) {
+		PMD_DRV_LOG(ERR,
+			    "%s, Session info invalid\n",
+			    tf_dir_2_str(parms->dir));
+		return -EINVAL;
+	}
+
+	tfs = (struct tf_session *)(tfp->session->core_data);
+
+	/*
+	 * Each tcam send msg function should check for key sizes range
+	 */
+
+	rc = tf_rm_lookup_tcam_type_pool(tfs,
+					 parms->dir,
+					 parms->tcam_tbl_type,
+					 &session_pool);
+	/* Error logging handled by tf_rm_lookup_tcam_type_pool */
+	if (rc)
+		return rc;
+
+
+	/* Verify that the entry has been previously allocated */
+	id = ba_inuse(session_pool, parms->idx);
+	if (id != 1) {
+		PMD_DRV_LOG(ERR,
+		   "%s: %s: Invalid or not allocated index, idx:%d\n",
+		   tf_dir_2_str(parms->dir),
+		   tf_tcam_tbl_2_str(parms->tcam_tbl_type),
+		   parms->idx);
+		return -EINVAL;
+	}
+
+	rc = tf_msg_tcam_entry_set(tfp, parms);
+
+	return rc;
+}
+
+int
+tf_get_tcam_entry(struct tf *tfp __rte_unused,
+		  struct tf_get_tcam_entry_parms *parms __rte_unused)
+{
+	int rc = -EOPNOTSUPP;
+
+	if (tfp == NULL || parms == NULL) {
+		PMD_DRV_LOG(ERR, "Invalid parameters\n");
+		return -EINVAL;
+	}
+
+	if (tfp->session == NULL || tfp->session->core_data == NULL) {
+		PMD_DRV_LOG(ERR,
+			    "%s, Session info invalid\n",
+			    tf_dir_2_str(parms->dir));
+		return -EINVAL;
+	}
+
+	return rc;
+}
+
+int
+tf_free_tcam_entry(struct tf *tfp,
+		   struct tf_free_tcam_entry_parms *parms)
+{
+	int rc;
+	struct tf_session *tfs;
+	struct bitalloc *session_pool;
+
+	if (parms == NULL || tfp == NULL)
+		return -EINVAL;
+
+	if (tfp->session == NULL || tfp->session->core_data == NULL) {
+		PMD_DRV_LOG(ERR, "%s: Session error\n",
+			    tf_dir_2_str(parms->dir));
+		return -EINVAL;
+	}
+
+	tfs = (struct tf_session *)(tfp->session->core_data);
+
+	rc = tf_rm_lookup_tcam_type_pool(tfs,
+					 parms->dir,
+					 parms->tcam_tbl_type,
+					 &session_pool);
+	/* Error logging handled by tf_rm_lookup_tcam_type_pool */
+	if (rc)
+		return rc;
+
+	rc = ba_inuse(session_pool, (int)parms->idx);
+	if (rc == BA_FAIL || rc == BA_ENTRY_FREE) {
+		PMD_DRV_LOG(ERR, "%s: %s: Entry %d already free",
+			    tf_dir_2_str(parms->dir),
+			    tf_tcam_tbl_2_str(parms->tcam_tbl_type),
+			    parms->idx);
+		return -EINVAL;
+	}
+
+	ba_free(session_pool, (int)parms->idx);
+
+	rc = tf_msg_tcam_entry_free(tfp, parms);
+	if (rc) {
+		/* Log error */
+		PMD_DRV_LOG(ERR, "%s: %s: Entry %d free failed",
+			    tf_dir_2_str(parms->dir),
+			    tf_tcam_tbl_2_str(parms->tcam_tbl_type),
+			    parms->idx);
+	}
+
+	return rc;
+}
diff --git a/drivers/net/bnxt/tf_core/tf_core.h b/drivers/net/bnxt/tf_core/tf_core.h
index afad9ea..1431d06 100644
--- a/drivers/net/bnxt/tf_core/tf_core.h
+++ b/drivers/net/bnxt/tf_core/tf_core.h
@@ -472,6 +472,233 @@ enum tf_tcam_tbl_type {
 };
 
 /**
+ * @page tcam TCAM Access
+ *
+ * @ref tf_alloc_tcam_entry
+ *
+ * @ref tf_set_tcam_entry
+ *
+ * @ref tf_get_tcam_entry
+ *
+ * @ref tf_free_tcam_entry
+ */
+
+/** tf_alloc_tcam_entry parameter definition
+ */
+struct tf_alloc_tcam_entry_parms {
+	/**
+	 * [in] receive or transmit direction
+	 */
+	enum tf_dir dir;
+	/**
+	 * [in] TCAM table type
+	 */
+	enum tf_tcam_tbl_type tcam_tbl_type;
+	/**
+	 * [in] Enable search for matching entry
+	 */
+	uint8_t search_enable;
+	/**
+	 * [in] Key data to match on (if search)
+	 */
+	uint8_t *key;
+	/**
+	 * [in] key size in bits (if search)
+	 */
+	uint16_t key_sz_in_bits;
+	/**
+	 * [in] Mask data to match on (if search)
+	 */
+	uint8_t *mask;
+	/**
+	 * [in] Priority of entry requested (definition TBD)
+	 */
+	uint32_t priority;
+	/**
+	 * [out] If search, set if matching entry found
+	 */
+	uint8_t hit;
+	/**
+	 * [out] Current refcnt after allocation
+	 */
+	uint16_t ref_cnt;
+	/**
+	 * [out] Idx allocated
+	 *
+	 */
+	uint16_t idx;
+};
+
+/** allocate TCAM entry
+ *
+ * Allocate a TCAM entry - one of these types:
+ *
+ * L2 Context
+ * Profile TCAM
+ * WC TCAM
+ * VEB TCAM
+ *
+ * This function allocates a TCAM table record.	 This function
+ * will attempt to allocate a TCAM table entry from the session
+ * owned TCAM entries or search a shadow copy of the TCAM table for a
+ * matching entry if search is enabled.	 Key, mask and result must match for
+ * hit to be set.  Only TruFlow core data is accessed.
+ * A hash table to entry mapping is maintained for search purposes.  If
+ * search is not enabled, the first available free entry is returned based
+ * on priority and alloc_cnt is set to 1.  If search is enabled and a matching
+ * entry to entry_data is found, hit is set to TRUE and alloc_cnt is set to 1.
+ * RefCnt is also returned.
+ *
+ * Also returns success or failure code.
+ */
+int tf_alloc_tcam_entry(struct tf *tfp,
+			struct tf_alloc_tcam_entry_parms *parms);
+
+/** tf_set_tcam_entry parameter definition
+ */
+struct	tf_set_tcam_entry_parms {
+	/**
+	 * [in] receive or transmit direction
+	 */
+	enum tf_dir dir;
+	/**
+	 * [in] TCAM table type
+	 */
+	enum tf_tcam_tbl_type tcam_tbl_type;
+	/**
+	 * [in] base index of the entry to program
+	 */
+	uint16_t idx;
+	/**
+	 * [in] struct containing key
+	 */
+	uint8_t *key;
+	/**
+	 * [in] struct containing mask fields
+	 */
+	uint8_t *mask;
+	/**
+	 * [in] key size in bits (if search)
+	 */
+	uint16_t key_sz_in_bits;
+	/**
+	 * [in] struct containing result
+	 */
+	uint8_t *result;
+	/**
+	 * [in] struct containing result size in bits
+	 */
+	uint16_t result_sz_in_bits;
+};
+
+/** set TCAM entry
+ *
+ * Program a TCAM table entry for a TruFlow session.
+ *
+ * If the entry has not been allocated, an error will be returned.
+ *
+ * Returns success or failure code.
+ */
+int tf_set_tcam_entry(struct tf	*tfp,
+		      struct tf_set_tcam_entry_parms *parms);
+
+/** tf_get_tcam_entry parameter definition
+ */
+struct tf_get_tcam_entry_parms {
+	/**
+	 * [in] receive or transmit direction
+	 */
+	enum tf_dir dir;
+	/**
+	 * [in] TCAM table type
+	 */
+	enum tf_tcam_tbl_type  tcam_tbl_type;
+	/**
+	 * [in] index of the entry to get
+	 */
+	uint16_t idx;
+	/**
+	 * [out] struct containing key
+	 */
+	uint8_t *key;
+	/**
+	 * [out] struct containing mask fields
+	 */
+	uint8_t *mask;
+	/**
+	 * [out] key size in bits
+	 */
+	uint16_t key_sz_in_bits;
+	/**
+	 * [out] struct containing result
+	 */
+	uint8_t *result;
+	/**
+	 * [out] struct containing result size in bits
+	 */
+	uint16_t result_sz_in_bits;
+};
+
+/** get TCAM entry
+ *
+ * Program a TCAM table entry for a TruFlow session.
+ *
+ * If the entry has not been allocated, an error will be returned.
+ *
+ * Returns success or failure code.
+ */
+int tf_get_tcam_entry(struct tf *tfp,
+		      struct tf_get_tcam_entry_parms *parms);
+
+/** tf_free_tcam_entry parameter definition
+ */
+struct tf_free_tcam_entry_parms {
+	/**
+	 * [in] receive or transmit direction
+	 */
+	enum tf_dir dir;
+	/**
+	 * [in] TCAM table type
+	 */
+	enum tf_tcam_tbl_type tcam_tbl_type;
+	/**
+	 * [in] Index to free
+	 */
+	uint16_t idx;
+	/**
+	 * [out] reference count after free
+	 */
+	uint16_t ref_cnt;
+};
+
+/** free TCAM entry
+ *
+ * Free TCAM entry.
+ *
+ * Firmware checks to ensure the TCAM entries are owned by the TruFlow
+ * session.  TCAM entry will be invalidated.  All-ones mask.
+ * writes to hw.
+ *
+ * WCTCAM profile id of 0 must be used to invalidate an entry.
+ *
+ * Returns success or failure code.
+ */
+int tf_free_tcam_entry(struct tf *tfp,
+		       struct tf_free_tcam_entry_parms *parms);
+
+/**
+ * @page table Table Access
+ *
+ * @ref tf_alloc_tbl_entry
+ *
+ * @ref tf_free_tbl_entry
+ *
+ * @ref tf_set_tbl_entry
+ *
+ * @ref tf_get_tbl_entry
+ */
+
+/**
  * Enumeration of TruFlow table types. A table type is used to identify a
  * resource object.
  *
diff --git a/drivers/net/bnxt/tf_core/tf_msg.c b/drivers/net/bnxt/tf_core/tf_msg.c
index c44f96f..9d17440 100644
--- a/drivers/net/bnxt/tf_core/tf_msg.c
+++ b/drivers/net/bnxt/tf_core/tf_msg.c
@@ -106,6 +106,39 @@ struct tf_msg_dma_buf {
 	uint64_t pa_addr;
 };
 
+static int
+tf_tcam_tbl_2_hwrm(enum tf_tcam_tbl_type tcam_type,
+		   uint32_t *hwrm_type)
+{
+	int rc = 0;
+
+	switch (tcam_type) {
+	case TF_TCAM_TBL_TYPE_L2_CTXT_TCAM:
+		*hwrm_type = TF_DEV_DATA_TYPE_TF_L2_CTX_ENTRY;
+		break;
+	case TF_TCAM_TBL_TYPE_PROF_TCAM:
+		*hwrm_type = TF_DEV_DATA_TYPE_TF_PROF_TCAM_ENTRY;
+		break;
+	case TF_TCAM_TBL_TYPE_WC_TCAM:
+		*hwrm_type = TF_DEV_DATA_TYPE_TF_WC_ENTRY;
+		break;
+	case TF_TCAM_TBL_TYPE_VEB_TCAM:
+		rc = -EOPNOTSUPP;
+		break;
+	case TF_TCAM_TBL_TYPE_SP_TCAM:
+		rc = -EOPNOTSUPP;
+		break;
+	case TF_TCAM_TBL_TYPE_CT_RULE_TCAM:
+		rc = -EOPNOTSUPP;
+		break;
+	default:
+		rc = -EOPNOTSUPP;
+		break;
+	}
+
+	return rc;
+}
+
 /**
  * Sends session open request to TF Firmware
  */
@@ -835,3 +868,129 @@ tf_msg_session_sram_resc_flush(struct tf *tfp,
 
 	return tfp_le_to_cpu_32(parms.tf_resp_code);
 }
+
+#define TF_BYTES_PER_SLICE(tfp) 12
+#define NUM_SLICES(tfp, bytes) \
+	(((bytes) + TF_BYTES_PER_SLICE(tfp) - 1) / TF_BYTES_PER_SLICE(tfp))
+
+static int
+tf_msg_get_dma_buf(struct tf_msg_dma_buf *buf, int size)
+{
+	struct tfp_calloc_parms alloc_parms;
+	int rc;
+
+	/* Allocate session */
+	alloc_parms.nitems = 1;
+	alloc_parms.size = size;
+	alloc_parms.alignment = 0;
+	rc = tfp_calloc(&alloc_parms);
+	if (rc) {
+		/* Log error */
+		PMD_DRV_LOG(ERR,
+			    "Failed to allocate tcam dma entry, rc:%d\n",
+			    rc);
+		return -ENOMEM;
+	}
+
+	buf->pa_addr = (uintptr_t)alloc_parms.mem_pa;
+	buf->va_addr = alloc_parms.mem_va;
+
+	return 0;
+}
+
+int
+tf_msg_tcam_entry_set(struct tf *tfp,
+		      struct tf_set_tcam_entry_parms *parms)
+{
+	int rc;
+	struct tfp_send_msg_parms mparms = { 0 };
+	struct hwrm_tf_tcam_set_input req = { 0 };
+	struct hwrm_tf_tcam_set_output resp = { 0 };
+	uint16_t key_bytes =
+		TF_BITS2BYTES_WORD_ALIGN(parms->key_sz_in_bits);
+	uint16_t result_bytes =
+		TF_BITS2BYTES_WORD_ALIGN(parms->result_sz_in_bits);
+	struct tf_msg_dma_buf buf = { 0 };
+	uint8_t *data = NULL;
+	int data_size = 0;
+
+	rc = tf_tcam_tbl_2_hwrm(parms->tcam_tbl_type, &req.type);
+	if (rc != 0)
+		return rc;
+
+	req.idx = tfp_cpu_to_le_16(parms->idx);
+	if (parms->dir == TF_DIR_TX)
+		req.flags |= HWRM_TF_TCAM_SET_INPUT_FLAGS_DIR_TX;
+
+	req.key_size = key_bytes;
+	req.mask_offset = key_bytes;
+	/* Result follows after key and mask, thus multiply by 2 */
+	req.result_offset = 2 * key_bytes;
+	req.result_size = result_bytes;
+	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_get_dma_buf(&buf, data_size);
+		if (rc != 0)
+			return rc;
+		data = buf.va_addr;
+		memcpy(&req.dev_data[0], &buf.pa_addr, sizeof(buf.pa_addr));
+	}
+
+	memcpy(&data[0], parms->key, key_bytes);
+	memcpy(&data[key_bytes], parms->mask, key_bytes);
+	memcpy(&data[req.result_offset], parms->result, result_bytes);
+
+	mparms.tf_type = HWRM_TF_TCAM_SET;
+	mparms.req_data = (uint32_t *)&req;
+	mparms.req_size = sizeof(req);
+	mparms.resp_data = (uint32_t *)&resp;
+	mparms.resp_size = sizeof(resp);
+	mparms.mailbox = TF_KONG_MB;
+
+	rc = tfp_send_msg_direct(tfp,
+				 &mparms);
+	if (rc)
+		return rc;
+
+	if (buf.va_addr != NULL)
+		tfp_free(buf.va_addr);
+
+	return rc;
+}
+
+int
+tf_msg_tcam_entry_free(struct tf *tfp,
+		       struct tf_free_tcam_entry_parms *in_parms)
+{
+	int rc;
+	struct hwrm_tf_tcam_free_input req =  { 0 };
+	struct hwrm_tf_tcam_free_output resp = { 0 };
+	struct tfp_send_msg_parms parms = { 0 };
+
+	/* Populate the request */
+	rc = tf_tcam_tbl_2_hwrm(in_parms->tcam_tbl_type, &req.type);
+	if (rc != 0)
+		return rc;
+
+	req.count = 1;
+	req.idx_list[0] = tfp_cpu_to_le_16(in_parms->idx);
+	if (in_parms->dir == TF_DIR_TX)
+		req.flags |= HWRM_TF_TCAM_FREE_INPUT_FLAGS_DIR_TX;
+
+	parms.tf_type = HWRM_TF_TCAM_FREE;
+	parms.req_data = (uint32_t *)&req;
+	parms.req_size = sizeof(req);
+	parms.resp_data = (uint32_t *)&resp;
+	parms.resp_size = sizeof(resp);
+	parms.mailbox = TF_KONG_MB;
+
+	rc = tfp_send_msg_direct(tfp,
+				 &parms);
+	return rc;
+}
diff --git a/drivers/net/bnxt/tf_core/tf_msg.h b/drivers/net/bnxt/tf_core/tf_msg.h
index 057de84..fa74d78 100644
--- a/drivers/net/bnxt/tf_core/tf_msg.h
+++ b/drivers/net/bnxt/tf_core/tf_msg.h
@@ -120,4 +120,34 @@ int tf_msg_session_sram_resc_flush(struct tf *tfp,
 				   enum tf_dir dir,
 				   struct tf_rm_entry *sram_entry);
 
+/**
+ * Sends tcam entry 'set' to the Firmware.
+ *
+ * [in] tfp
+ *   Pointer to session handle
+ *
+ * [in] parms
+ *   Pointer to set parameters
+ *
+ * Returns:
+ *  0 on Success else internal Truflow error
+ */
+int tf_msg_tcam_entry_set(struct tf *tfp,
+			  struct tf_set_tcam_entry_parms *parms);
+
+/**
+ * Sends tcam entry 'free' to the Firmware.
+ *
+ * [in] tfp
+ *   Pointer to session handle
+ *
+ * [in] parms
+ *   Pointer to free parameters
+ *
+ * Returns:
+ *  0 on Success else internal Truflow error
+ */
+int tf_msg_tcam_entry_free(struct tf *tfp,
+			   struct tf_free_tcam_entry_parms *parms);
+
 #endif  /* _TF_MSG_H_ */
-- 
2.7.4