qla3xxx: Dynamically size the rx buffer queue based on the MTU.

This change removes use of constants for rx buffer queue size
and instead calculates the queue length based on what he MTU
is set to.

Signed-off-by: Ron Mercer <ron.mercer@qlogic.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 28 insertions, 13 deletions

diff --git a/drivers/net/qla3xxx.c b/drivers/net/qla3xxx.c
index c25a1f728715..7d68d1f2df69 100755
--- a/drivers/net/qla3xxx.c
+++ b/drivers/net/qla3xxx.c
@@ -1700,11 +1700,11 @@ static void ql_update_lrg_bufq_prod_index(struct ql3_adapter *qdev)
 
 			qdev->lrg_buf_q_producer_index++;
 
-			if (qdev->lrg_buf_q_producer_index == NUM_LBUFQ_ENTRIES)
+			if (qdev->lrg_buf_q_producer_index == qdev->num_lbufq_entries)
 				qdev->lrg_buf_q_producer_index = 0;
 
 			if (qdev->lrg_buf_q_producer_index ==
-			    (NUM_LBUFQ_ENTRIES - 1)) {
+			    (qdev->num_lbufq_entries - 1)) {
 				lrg_buf_q_ele = qdev->lrg_buf_q_virt_addr;
 			}
 		}
@@ -1785,7 +1785,7 @@ static void ql_process_mac_rx_intr(struct ql3_adapter *qdev,
 		lrg_buf_phy_addr_low = le32_to_cpu(*curr_ial_ptr);
 		lrg_buf_cb1 = &qdev->lrg_buf[qdev->lrg_buf_index];
 		qdev->lrg_buf_release_cnt++;
-		if (++qdev->lrg_buf_index == NUM_LARGE_BUFFERS) {
+		if (++qdev->lrg_buf_index == qdev->num_large_buffers) {
 			qdev->lrg_buf_index = 0;
 		}
 		curr_ial_ptr++;	/* 64-bit pointers require two incs. */
@@ -1800,7 +1800,7 @@ static void ql_process_mac_rx_intr(struct ql3_adapter *qdev,
 	 * Second buffer gets sent up the stack.
 	 */
 	qdev->lrg_buf_release_cnt++;
-	if (++qdev->lrg_buf_index == NUM_LARGE_BUFFERS)
+	if (++qdev->lrg_buf_index == qdev->num_large_buffers)
 		qdev->lrg_buf_index = 0;
 	skb = lrg_buf_cb2->skb;
 
@@ -1855,7 +1855,7 @@ static void ql_process_macip_rx_intr(struct ql3_adapter *qdev,
 		lrg_buf_phy_addr_low = le32_to_cpu(*curr_ial_ptr);
 		lrg_buf_cb1 = &qdev->lrg_buf[qdev->lrg_buf_index];
 		qdev->lrg_buf_release_cnt++;
-		if (++qdev->lrg_buf_index == NUM_LARGE_BUFFERS)
+		if (++qdev->lrg_buf_index == qdev->num_large_buffers)
 			qdev->lrg_buf_index = 0;
 		skb1 = lrg_buf_cb1->skb;
 		curr_ial_ptr++;	/* 64-bit pointers require two incs. */
@@ -1870,7 +1870,7 @@ static void ql_process_macip_rx_intr(struct ql3_adapter *qdev,
 	lrg_buf_cb2 = &qdev->lrg_buf[qdev->lrg_buf_index];
 	skb2 = lrg_buf_cb2->skb;
 	qdev->lrg_buf_release_cnt++;
-	if (++qdev->lrg_buf_index == NUM_LARGE_BUFFERS)
+	if (++qdev->lrg_buf_index == qdev->num_large_buffers)
 		qdev->lrg_buf_index = 0;
 
 	skb_put(skb2, length);	/* Just the second buffer length here. */
@@ -2347,12 +2347,19 @@ static int ql_alloc_buffer_queues(struct ql3_adapter *qdev)
 {
 	/* Create Large Buffer Queue */
 	qdev->lrg_buf_q_size =
-	    NUM_LBUFQ_ENTRIES * sizeof(struct lrg_buf_q_entry);
+	    qdev->num_lbufq_entries * sizeof(struct lrg_buf_q_entry);
 	if (qdev->lrg_buf_q_size < PAGE_SIZE)
 		qdev->lrg_buf_q_alloc_size = PAGE_SIZE;
 	else
 		qdev->lrg_buf_q_alloc_size = qdev->lrg_buf_q_size * 2;
 
+	qdev->lrg_buf = kmalloc(qdev->num_large_buffers * sizeof(struct ql_rcv_buf_cb),GFP_KERNEL);
+	if (qdev->lrg_buf == NULL) {
+		printk(KERN_ERR PFX
+		       "%s: qdev->lrg_buf alloc failed.\n", qdev->ndev->name);
+		return -ENOMEM;
+	}
+	
 	qdev->lrg_buf_q_alloc_virt_addr =
 	    pci_alloc_consistent(qdev->pdev,
 				 qdev->lrg_buf_q_alloc_size,
@@ -2402,6 +2409,7 @@ static void ql_free_buffer_queues(struct ql3_adapter *qdev)
 		       "%s: Already done.\n", qdev->ndev->name);
 		return;
 	}
+	if(qdev->lrg_buf) kfree(qdev->lrg_buf);
 
 	pci_free_consistent(qdev->pdev,
 			    qdev->lrg_buf_q_alloc_size,
@@ -2485,7 +2493,7 @@ static void ql_free_large_buffers(struct ql3_adapter *qdev)
 	int i = 0;
 	struct ql_rcv_buf_cb *lrg_buf_cb;
 
-	for (i = 0; i < NUM_LARGE_BUFFERS; i++) {
+	for (i = 0; i < qdev->num_large_buffers; i++) {
 		lrg_buf_cb = &qdev->lrg_buf[i];
 		if (lrg_buf_cb->skb) {
 			dev_kfree_skb(lrg_buf_cb->skb);
@@ -2506,7 +2514,7 @@ static void ql_init_large_buffers(struct ql3_adapter *qdev)
 	struct ql_rcv_buf_cb *lrg_buf_cb;
 	struct bufq_addr_element *buf_addr_ele = qdev->lrg_buf_q_virt_addr;
 
-	for (i = 0; i < NUM_LARGE_BUFFERS; i++) {
+	for (i = 0; i < qdev->num_large_buffers; i++) {
 		lrg_buf_cb = &qdev->lrg_buf[i];
 		buf_addr_ele->addr_high = lrg_buf_cb->buf_phy_addr_high;
 		buf_addr_ele->addr_low = lrg_buf_cb->buf_phy_addr_low;
@@ -2523,7 +2531,7 @@ static int ql_alloc_large_buffers(struct ql3_adapter *qdev)
 	struct sk_buff *skb;
 	u64 map;
 
-	for (i = 0; i < NUM_LARGE_BUFFERS; i++) {
+	for (i = 0; i < qdev->num_large_buffers; i++) {
 		skb = netdev_alloc_skb(qdev->ndev,
 				       qdev->lrg_buffer_len);
 		if (unlikely(!skb)) {
@@ -2602,9 +2610,15 @@ static int ql_create_send_free_list(struct ql3_adapter *qdev)
 
 static int ql_alloc_mem_resources(struct ql3_adapter *qdev)
 {
-	if (qdev->ndev->mtu == NORMAL_MTU_SIZE)
+	if (qdev->ndev->mtu == NORMAL_MTU_SIZE) {
+		qdev->num_lbufq_entries = NUM_LBUFQ_ENTRIES;
 		qdev->lrg_buffer_len = NORMAL_MTU_SIZE;
+	}
 	else if (qdev->ndev->mtu == JUMBO_MTU_SIZE) {
+		/*
+		 * Bigger buffers, so less of them.
+		 */
+		qdev->num_lbufq_entries = JUMBO_NUM_LBUFQ_ENTRIES;
 		qdev->lrg_buffer_len = JUMBO_MTU_SIZE;
 	} else {
 		printk(KERN_ERR PFX
@@ -2612,6 +2626,7 @@ static int ql_alloc_mem_resources(struct ql3_adapter *qdev)
 		       qdev->ndev->name);
 		return -ENOMEM;
 	}
+	qdev->num_large_buffers = qdev->num_lbufq_entries * QL_ADDR_ELE_PER_BUFQ_ENTRY;
 	qdev->lrg_buffer_len += VLAN_ETH_HLEN + VLAN_ID_LEN + QL_HEADER_SPACE;
 	qdev->max_frame_size =
 	    (qdev->lrg_buffer_len - QL_HEADER_SPACE) + ETHERNET_CRC_SIZE;
@@ -2844,7 +2859,7 @@ static int ql_adapter_initialize(struct ql3_adapter *qdev)
 			   &hmem_regs->rxLargeQBaseAddrLow,
 			   LS_64BITS(qdev->lrg_buf_q_phy_addr));
 
-	ql_write_page1_reg(qdev, &hmem_regs->rxLargeQLength, NUM_LBUFQ_ENTRIES);
+	ql_write_page1_reg(qdev, &hmem_regs->rxLargeQLength, qdev->num_lbufq_entries);
 
 	ql_write_page1_reg(qdev,
 			   &hmem_regs->rxLargeBufferLength,
@@ -2866,7 +2881,7 @@ static int ql_adapter_initialize(struct ql3_adapter *qdev)
 
 	qdev->small_buf_q_producer_index = NUM_SBUFQ_ENTRIES - 1;
 	qdev->small_buf_release_cnt = 8;
-	qdev->lrg_buf_q_producer_index = NUM_LBUFQ_ENTRIES - 1;
+	qdev->lrg_buf_q_producer_index = qdev->num_lbufq_entries - 1;
 	qdev->lrg_buf_release_cnt = 8;
 	qdev->lrg_buf_next_free =
 	    (struct bufq_addr_element *)qdev->lrg_buf_q_virt_addr;