qed: simplify chain allocation with init params struct

To simplify qed_chain_alloc() prototype and call sites, introduce struct
qed_chain_init_params to specify chain params, and pass a pointer to
filled struct to the actual qed_chain_alloc() instead of a long list
of separate arguments.

Signed-off-by: Alexander Lobakin <alobakin@marvell.com>
Signed-off-by: Igor Russkikh <irusskikh@marvell.com>
Signed-off-by: Michal Kalderon <michal.kalderon@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/qlogic/qed/qed_chain.c

@@ -7,23 +7,22 @@
 
 #include "qed_dev_api.h"
 
-static void qed_chain_init_params(struct qed_chain *chain,
-				  u32 page_cnt, u8 elem_size,
-				  enum qed_chain_use_mode intended_use,
-				  enum qed_chain_mode mode,
-				  enum qed_chain_cnt_type cnt_type,
-				  const struct qed_chain_ext_pbl *ext_pbl)
+static void qed_chain_init(struct qed_chain *chain,
+			   const struct qed_chain_init_params *params,
+			   u32 page_cnt)
 {
 	memset(chain, 0, sizeof(*chain));
 
-	chain->elem_size = elem_size;
-	chain->intended_use = intended_use;
-	chain->mode = mode;
-	chain->cnt_type = cnt_type;
+	chain->elem_size = params->elem_size;
+	chain->intended_use = params->intended_use;
+	chain->mode = params->mode;
+	chain->cnt_type = params->cnt_type;
 
-	chain->elem_per_page = ELEMS_PER_PAGE(elem_size);
-	chain->usable_per_page = USABLE_ELEMS_PER_PAGE(elem_size, mode);
-	chain->elem_unusable = UNUSABLE_ELEMS_PER_PAGE(elem_size, mode);
+	chain->elem_per_page = ELEMS_PER_PAGE(params->elem_size);
+	chain->usable_per_page = USABLE_ELEMS_PER_PAGE(params->elem_size,
+						       params->mode);
+	chain->elem_unusable = UNUSABLE_ELEMS_PER_PAGE(params->elem_size,
+						       params->mode);
 
 	chain->elem_per_page_mask = chain->elem_per_page - 1;
 	chain->next_page_mask = chain->usable_per_page &
@@ -33,9 +32,9 @@ static void qed_chain_init_params(struct qed_chain *chain,
 	chain->capacity = chain->usable_per_page * page_cnt;
 	chain->size = chain->elem_per_page * page_cnt;
 
-	if (ext_pbl && ext_pbl->p_pbl_virt) {
-		chain->pbl_sp.table_virt = ext_pbl->p_pbl_virt;
-		chain->pbl_sp.table_phys = ext_pbl->p_pbl_phys;
+	if (params->ext_pbl_virt) {
+		chain->pbl_sp.table_virt = params->ext_pbl_virt;
+		chain->pbl_sp.table_phys = params->ext_pbl_phys;
 
 		chain->b_external_pbl = true;
 	}
@@ -154,10 +153,16 @@ void qed_chain_free(struct qed_dev *cdev, struct qed_chain *chain)
 
 static int
 qed_chain_alloc_sanity_check(struct qed_dev *cdev,
-			     enum qed_chain_cnt_type cnt_type,
-			     size_t elem_size, u32 page_cnt)
+			     const struct qed_chain_init_params *params,
+			     u32 page_cnt)
 {
-	u64 chain_size = ELEMS_PER_PAGE(elem_size) * page_cnt;
+	u64 chain_size;
+
+	chain_size = ELEMS_PER_PAGE(params->elem_size);
+	chain_size *= page_cnt;
+
+	if (!chain_size)
+		return -EINVAL;
 
 	/* The actual chain size can be larger than the maximal possible value
 	 * after rounding up the requested elements number to pages, and after
@@ -165,7 +170,7 @@ qed_chain_alloc_sanity_check(struct qed_dev *cdev,
 	 * The size of a "u16" chain can be (U16_MAX + 1) since the chain
 	 * size/capacity fields are of u32 type.
 	 */
-	switch (cnt_type) {
+	switch (params->cnt_type) {
 	case QED_CHAIN_CNT_TYPE_U16:
 		if (chain_size > U16_MAX + 1)
 			break;
@@ -298,37 +303,42 @@ alloc_pages:
 	return 0;
 }
 
-int qed_chain_alloc(struct qed_dev *cdev,
-		    enum qed_chain_use_mode intended_use,
-		    enum qed_chain_mode mode,
-		    enum qed_chain_cnt_type cnt_type,
-		    u32 num_elems,
-		    size_t elem_size,
-		    struct qed_chain *chain,
-		    struct qed_chain_ext_pbl *ext_pbl)
+/**
+ * qed_chain_alloc() - Allocate and initialize a chain.
+ *
+ * @cdev: Main device structure.
+ * @chain: Chain to be processed.
+ * @params: Chain initialization parameters.
+ *
+ * Return: 0 on success, negative errno otherwise.
+ */
+int qed_chain_alloc(struct qed_dev *cdev, struct qed_chain *chain,
+		    struct qed_chain_init_params *params)
 {
 	u32 page_cnt;
 	int rc;
 
-	if (mode == QED_CHAIN_MODE_SINGLE)
+	if (params->mode == QED_CHAIN_MODE_SINGLE)
 		page_cnt = 1;
 	else
-		page_cnt = QED_CHAIN_PAGE_CNT(num_elems, elem_size, mode);
+		page_cnt = QED_CHAIN_PAGE_CNT(params->num_elems,
+					      params->elem_size,
+					      params->mode);
 
-	rc = qed_chain_alloc_sanity_check(cdev, cnt_type, elem_size, page_cnt);
+	rc = qed_chain_alloc_sanity_check(cdev, params, page_cnt);
 	if (rc) {
 		DP_NOTICE(cdev,
 			  "Cannot allocate a chain with the given arguments:\n");
 		DP_NOTICE(cdev,
 			  "[use_mode %d, mode %d, cnt_type %d, num_elems %d, elem_size %zu]\n",
-			  intended_use, mode, cnt_type, num_elems, elem_size);
+			  params->intended_use, params->mode, params->cnt_type,
+			  params->num_elems, params->elem_size);
 		return rc;
 	}
 
-	qed_chain_init_params(chain, page_cnt, elem_size, intended_use, mode,
-			      cnt_type, ext_pbl);
+	qed_chain_init(chain, params, page_cnt);
 
-	switch (mode) {
+	switch (params->mode) {
 	case QED_CHAIN_MODE_NEXT_PTR:
 		rc = qed_chain_alloc_next_ptr(cdev, chain);
 		break;

drivers/net/ethernet/qlogic/qed/qed_dev_api.h

@@ -254,35 +254,9 @@ int qed_dmae_host2host(struct qed_hwfn *p_hwfn,
 		       dma_addr_t dest_addr,
 		       u32 size_in_dwords, struct qed_dmae_params *p_params);
 
-/**
- * @brief qed_chain_alloc - Allocate and initialize a chain
- *
- * @param p_hwfn
- * @param intended_use
- * @param mode
- * @param num_elems
- * @param elem_size
- * @param p_chain
- * @param ext_pbl - a possible external PBL
- *
- * @return int
- */
-int
-qed_chain_alloc(struct qed_dev *cdev,
-		enum qed_chain_use_mode intended_use,
-		enum qed_chain_mode mode,
-		enum qed_chain_cnt_type cnt_type,
-		u32 num_elems,
-		size_t elem_size,
-		struct qed_chain *p_chain, struct qed_chain_ext_pbl *ext_pbl);
-
-/**
- * @brief qed_chain_free - Free chain DMA memory
- *
- * @param p_hwfn
- * @param p_chain
- */
-void qed_chain_free(struct qed_dev *cdev, struct qed_chain *p_chain);
+int qed_chain_alloc(struct qed_dev *cdev, struct qed_chain *chain,
+		    struct qed_chain_init_params *params);
+void qed_chain_free(struct qed_dev *cdev, struct qed_chain *chain);
 
 /**
  * @@brief qed_fw_l2_queue - Get absolute L2 queue ID

drivers/net/ethernet/qlogic/qed/qed_iscsi.c

@@ -684,9 +684,13 @@ nomem:
 static int qed_iscsi_allocate_connection(struct qed_hwfn *p_hwfn,
 					 struct qed_iscsi_conn **p_out_conn)
 {
-	u16 uhq_num_elements = 0, xhq_num_elements = 0, r2tq_num_elements = 0;
 	struct scsi_terminate_extra_params *p_q_cnts = NULL;
 	struct qed_iscsi_pf_params *p_params = NULL;
+	struct qed_chain_init_params params = {
+		.mode		= QED_CHAIN_MODE_PBL,
+		.intended_use	= QED_CHAIN_USE_TO_CONSUME_PRODUCE,
+		.cnt_type	= QED_CHAIN_CNT_TYPE_U16,
+	};
 	struct tcp_upload_params *p_tcp = NULL;
 	struct qed_iscsi_conn *p_conn = NULL;
 	int rc = 0;
@@ -727,34 +731,25 @@ static int qed_iscsi_allocate_connection(struct qed_hwfn *p_hwfn,
 		goto nomem_upload_param;
 	p_conn->tcp_upload_params_virt_addr = p_tcp;
 
-	r2tq_num_elements = p_params->num_r2tq_pages_in_ring *
-			    QED_CHAIN_PAGE_SIZE / 0x80;
-	rc = qed_chain_alloc(p_hwfn->cdev,
-			     QED_CHAIN_USE_TO_CONSUME_PRODUCE,
-			     QED_CHAIN_MODE_PBL,
-			     QED_CHAIN_CNT_TYPE_U16,
-			     r2tq_num_elements, 0x80, &p_conn->r2tq, NULL);
+	params.num_elems = p_params->num_r2tq_pages_in_ring *
+			   QED_CHAIN_PAGE_SIZE / sizeof(struct iscsi_wqe);
+	params.elem_size = sizeof(struct iscsi_wqe);
+
+	rc = qed_chain_alloc(p_hwfn->cdev, &p_conn->r2tq, &params);
 	if (rc)
 		goto nomem_r2tq;
 
-	uhq_num_elements = p_params->num_uhq_pages_in_ring *
+	params.num_elems = p_params->num_uhq_pages_in_ring *
 			   QED_CHAIN_PAGE_SIZE / sizeof(struct iscsi_uhqe);
-	rc = qed_chain_alloc(p_hwfn->cdev,
-			     QED_CHAIN_USE_TO_CONSUME_PRODUCE,
-			     QED_CHAIN_MODE_PBL,
-			     QED_CHAIN_CNT_TYPE_U16,
-			     uhq_num_elements,
-			     sizeof(struct iscsi_uhqe), &p_conn->uhq, NULL);
+	params.elem_size = sizeof(struct iscsi_uhqe);
+
+	rc = qed_chain_alloc(p_hwfn->cdev, &p_conn->uhq, &params);
 	if (rc)
 		goto nomem_uhq;
 
-	xhq_num_elements = uhq_num_elements;
-	rc = qed_chain_alloc(p_hwfn->cdev,
-			     QED_CHAIN_USE_TO_CONSUME_PRODUCE,
-			     QED_CHAIN_MODE_PBL,
-			     QED_CHAIN_CNT_TYPE_U16,
-			     xhq_num_elements,
-			     sizeof(struct iscsi_xhqe), &p_conn->xhq, NULL);
+	params.elem_size = sizeof(struct iscsi_xhqe);
+
+	rc = qed_chain_alloc(p_hwfn->cdev, &p_conn->xhq, &params);
 	if (rc)
 		goto nomem;
 

drivers/net/ethernet/qlogic/qed/qed_ll2.c

@@ -1125,6 +1125,12 @@ static int
 qed_ll2_acquire_connection_rx(struct qed_hwfn *p_hwfn,
 			      struct qed_ll2_info *p_ll2_info)
 {
+	struct qed_chain_init_params params = {
+		.intended_use	= QED_CHAIN_USE_TO_CONSUME_PRODUCE,
+		.cnt_type	= QED_CHAIN_CNT_TYPE_U16,
+		.num_elems	= p_ll2_info->input.rx_num_desc,
+	};
+	struct qed_dev *cdev = p_hwfn->cdev;
 	struct qed_ll2_rx_packet *p_descq;
 	u32 capacity;
 	int rc = 0;
@@ -1132,13 +1138,10 @@ qed_ll2_acquire_connection_rx(struct qed_hwfn *p_hwfn,
 	if (!p_ll2_info->input.rx_num_desc)
 		goto out;
 
-	rc = qed_chain_alloc(p_hwfn->cdev,
-			     QED_CHAIN_USE_TO_CONSUME_PRODUCE,
-			     QED_CHAIN_MODE_NEXT_PTR,
-			     QED_CHAIN_CNT_TYPE_U16,
-			     p_ll2_info->input.rx_num_desc,
-			     sizeof(struct core_rx_bd),
-			     &p_ll2_info->rx_queue.rxq_chain, NULL);
+	params.mode = QED_CHAIN_MODE_NEXT_PTR;
+	params.elem_size = sizeof(struct core_rx_bd);
+
+	rc = qed_chain_alloc(cdev, &p_ll2_info->rx_queue.rxq_chain, &params);
 	if (rc) {
 		DP_NOTICE(p_hwfn, "Failed to allocate ll2 rxq chain\n");
 		goto out;
@@ -1154,13 +1157,10 @@ qed_ll2_acquire_connection_rx(struct qed_hwfn *p_hwfn,
 	}
 	p_ll2_info->rx_queue.descq_array = p_descq;
 
-	rc = qed_chain_alloc(p_hwfn->cdev,
-			     QED_CHAIN_USE_TO_CONSUME_PRODUCE,
-			     QED_CHAIN_MODE_PBL,
-			     QED_CHAIN_CNT_TYPE_U16,
-			     p_ll2_info->input.rx_num_desc,
-			     sizeof(struct core_rx_fast_path_cqe),
-			     &p_ll2_info->rx_queue.rcq_chain, NULL);
+	params.mode = QED_CHAIN_MODE_PBL;
+	params.elem_size = sizeof(struct core_rx_fast_path_cqe);
+
+	rc = qed_chain_alloc(cdev, &p_ll2_info->rx_queue.rcq_chain, &params);
 	if (rc) {
 		DP_NOTICE(p_hwfn, "Failed to allocate ll2 rcq chain\n");
 		goto out;
@@ -1177,6 +1177,13 @@ out:
 static int qed_ll2_acquire_connection_tx(struct qed_hwfn *p_hwfn,
 					 struct qed_ll2_info *p_ll2_info)
 {
+	struct qed_chain_init_params params = {
+		.mode		= QED_CHAIN_MODE_PBL,
+		.intended_use	= QED_CHAIN_USE_TO_CONSUME_PRODUCE,
+		.cnt_type	= QED_CHAIN_CNT_TYPE_U16,
+		.num_elems	= p_ll2_info->input.tx_num_desc,
+		.elem_size	= sizeof(struct core_tx_bd),
+	};
 	struct qed_ll2_tx_packet *p_descq;
 	u32 desc_size;
 	u32 capacity;
@@ -1185,13 +1192,8 @@ static int qed_ll2_acquire_connection_tx(struct qed_hwfn *p_hwfn,
 	if (!p_ll2_info->input.tx_num_desc)
 		goto out;
 
-	rc = qed_chain_alloc(p_hwfn->cdev,
-			     QED_CHAIN_USE_TO_CONSUME_PRODUCE,
-			     QED_CHAIN_MODE_PBL,
-			     QED_CHAIN_CNT_TYPE_U16,
-			     p_ll2_info->input.tx_num_desc,
-			     sizeof(struct core_tx_bd),
-			     &p_ll2_info->tx_queue.txq_chain, NULL);
+	rc = qed_chain_alloc(p_hwfn->cdev, &p_ll2_info->tx_queue.txq_chain,
+			     &params);
 	if (rc)
 		goto out;
 

drivers/net/ethernet/qlogic/qed/qed_spq.c

@@ -382,22 +382,26 @@ int qed_eq_completion(struct qed_hwfn *p_hwfn, void *cookie)
 
 int qed_eq_alloc(struct qed_hwfn *p_hwfn, u16 num_elem)
 {
+	struct qed_chain_init_params params = {
+		.mode		= QED_CHAIN_MODE_PBL,
+		.intended_use	= QED_CHAIN_USE_TO_PRODUCE,
+		.cnt_type	= QED_CHAIN_CNT_TYPE_U16,
+		.num_elems	= num_elem,
+		.elem_size	= sizeof(union event_ring_element),
+	};
 	struct qed_eq *p_eq;
+	int ret;
 
 	/* Allocate EQ struct */
 	p_eq = kzalloc(sizeof(*p_eq), GFP_KERNEL);
 	if (!p_eq)
 		return -ENOMEM;
 
-	/* Allocate and initialize EQ chain*/
-	if (qed_chain_alloc(p_hwfn->cdev,
-			    QED_CHAIN_USE_TO_PRODUCE,
-			    QED_CHAIN_MODE_PBL,
-			    QED_CHAIN_CNT_TYPE_U16,
-			    num_elem,
-			    sizeof(union event_ring_element),
-			    &p_eq->chain, NULL))
+	ret = qed_chain_alloc(p_hwfn->cdev, &p_eq->chain, &params);
+	if (ret) {
+		DP_NOTICE(p_hwfn, "Failed to allocate EQ chain\n");
 		goto eq_allocate_fail;
+	}
 
 	/* register EQ completion on the SP SB */
 	qed_int_register_cb(p_hwfn, qed_eq_completion,
@@ -408,7 +412,8 @@ int qed_eq_alloc(struct qed_hwfn *p_hwfn, u16 num_elem)
 
 eq_allocate_fail:
 	kfree(p_eq);
-	return -ENOMEM;
+
+	return ret;
 }
 
 void qed_eq_setup(struct qed_hwfn *p_hwfn)
@@ -529,33 +534,40 @@ void qed_spq_setup(struct qed_hwfn *p_hwfn)
 
 int qed_spq_alloc(struct qed_hwfn *p_hwfn)
 {
+	struct qed_chain_init_params params = {
+		.mode		= QED_CHAIN_MODE_SINGLE,
+		.intended_use	= QED_CHAIN_USE_TO_PRODUCE,
+		.cnt_type	= QED_CHAIN_CNT_TYPE_U16,
+		.elem_size	= sizeof(struct slow_path_element),
+	};
+	struct qed_dev *cdev = p_hwfn->cdev;
 	struct qed_spq_entry *p_virt = NULL;
 	struct qed_spq *p_spq = NULL;
 	dma_addr_t p_phys = 0;
 	u32 capacity;
+	int ret;
 
 	/* SPQ struct */
 	p_spq = kzalloc(sizeof(struct qed_spq), GFP_KERNEL);
 	if (!p_spq)
 		return -ENOMEM;
 
-	/* SPQ ring  */
-	if (qed_chain_alloc(p_hwfn->cdev,
-			    QED_CHAIN_USE_TO_PRODUCE,
-			    QED_CHAIN_MODE_SINGLE,
-			    QED_CHAIN_CNT_TYPE_U16,
-			    0,   /* N/A when the mode is SINGLE */
-			    sizeof(struct slow_path_element),
-			    &p_spq->chain, NULL))
-		goto spq_allocate_fail;
+	/* SPQ ring */
+	ret = qed_chain_alloc(cdev, &p_spq->chain, &params);
+	if (ret) {
+		DP_NOTICE(p_hwfn, "Failed to allocate SPQ chain\n");
+		goto spq_chain_alloc_fail;
+	}
 
 	/* allocate and fill the SPQ elements (incl. ramrod data list) */
 	capacity = qed_chain_get_capacity(&p_spq->chain);
-	p_virt = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
+	ret = -ENOMEM;
+
+	p_virt = dma_alloc_coherent(&cdev->pdev->dev,
 				    capacity * sizeof(struct qed_spq_entry),
 				    &p_phys, GFP_KERNEL);
 	if (!p_virt)
-		goto spq_allocate_fail;
+		goto spq_alloc_fail;
 
 	p_spq->p_virt = p_virt;
 	p_spq->p_phys = p_phys;
@@ -563,10 +575,12 @@ int qed_spq_alloc(struct qed_hwfn *p_hwfn)
 
 	return 0;
 
-spq_allocate_fail:
-	qed_chain_free(p_hwfn->cdev, &p_spq->chain);
+spq_alloc_fail:
+	qed_chain_free(cdev, &p_spq->chain);
+spq_chain_alloc_fail:
 	kfree(p_spq);
-	return -ENOMEM;
+
+	return ret;
 }
 
 void qed_spq_free(struct qed_hwfn *p_hwfn)
@@ -967,30 +981,40 @@ int qed_spq_completion(struct qed_hwfn *p_hwfn,
 	return 0;
 }
 
+#define QED_SPQ_CONSQ_ELEM_SIZE		0x80
+
 int qed_consq_alloc(struct qed_hwfn *p_hwfn)
 {
+	struct qed_chain_init_params params = {
+		.mode		= QED_CHAIN_MODE_PBL,
+		.intended_use	= QED_CHAIN_USE_TO_PRODUCE,
+		.cnt_type	= QED_CHAIN_CNT_TYPE_U16,
+		.num_elems	= QED_CHAIN_PAGE_SIZE / QED_SPQ_CONSQ_ELEM_SIZE,
+		.elem_size	= QED_SPQ_CONSQ_ELEM_SIZE,
+	};
 	struct qed_consq *p_consq;
+	int ret;
 
 	/* Allocate ConsQ struct */
 	p_consq = kzalloc(sizeof(*p_consq), GFP_KERNEL);
 	if (!p_consq)
 		return -ENOMEM;
 
-	/* Allocate and initialize EQ chain*/
-	if (qed_chain_alloc(p_hwfn->cdev,
-			    QED_CHAIN_USE_TO_PRODUCE,
-			    QED_CHAIN_MODE_PBL,
-			    QED_CHAIN_CNT_TYPE_U16,
-			    QED_CHAIN_PAGE_SIZE / 0x80,
-			    0x80, &p_consq->chain, NULL))
-		goto consq_allocate_fail;
+	/* Allocate and initialize ConsQ chain */
+	ret = qed_chain_alloc(p_hwfn->cdev, &p_consq->chain, &params);
+	if (ret) {
+		DP_NOTICE(p_hwfn, "Failed to allocate ConsQ chain");
+		goto consq_alloc_fail;
+	}
 
 	p_hwfn->p_consq = p_consq;
+
 	return 0;
 
-consq_allocate_fail:
+consq_alloc_fail:
 	kfree(p_consq);
-	return -ENOMEM;
+
+	return ret;
 }
 
 void qed_consq_setup(struct qed_hwfn *p_hwfn)