netxen: refactor netxen_recv_context struct

o move related fields into netxen_recv_context struct.
o allocate rx buffer and descriptor rings dynamically.

Signed-off-by: Dhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

5 files changed, 71 insertions, 40 deletions

diff --git a/drivers/net/netxen/netxen_nic.h b/drivers/net/netxen/netxen_nic.h
index ebd6c2edc34..16f5e2267eb 100644
--- a/drivers/net/netxen/netxen_nic.h
+++ b/drivers/net/netxen/netxen_nic.h
@@ -775,8 +775,11 @@ struct netxen_recv_context {
         u16 context_id;
         u16 virt_port;
 
-        struct nx_host_rds_ring rds_rings[NUM_RCV_DESC_RINGS];
+        struct nx_host_rds_ring *rds_rings;
         struct nx_host_sds_ring *sds_rings;
+
+        struct netxen_ring_ctx *hwctx;
+        dma_addr_t phys_addr;
 };
 
 /* New HW context creation */
@@ -1258,11 +1261,8 @@ struct netxen_adapter {
         struct netxen_adapter_stats stats;
 
         struct netxen_recv_context recv_ctx;
-        struct nx_host_tx_ring tx_ring;
+        struct nx_host_tx_ring *tx_ring;
 
-        /* Context interface shared between card and host */
-        struct netxen_ring_ctx *ctx_desc;
-        dma_addr_t ctx_desc_phys_addr;
         int (*enable_phy_interrupts) (struct netxen_adapter *);
         int (*disable_phy_interrupts) (struct netxen_adapter *);
         int (*macaddr_set) (struct netxen_adapter *, netxen_ethernet_macaddr_t);
diff --git a/drivers/net/netxen/netxen_nic_ctx.c b/drivers/net/netxen/netxen_nic_ctx.c
index fd82adf4f87..4754f5cffad 100644
--- a/drivers/net/netxen/netxen_nic_ctx.c
+++ b/drivers/net/netxen/netxen_nic_ctx.c
@@ -323,7 +323,8 @@ nx_fw_cmd_create_tx_ctx(struct netxen_adapter *adapter)
         int     err = 0;
         u64     offset, phys_addr;
         dma_addr_t      rq_phys_addr, rsp_phys_addr;
-        struct nx_host_tx_ring *tx_ring = &adapter->tx_ring;
+        struct nx_host_tx_ring *tx_ring = adapter->tx_ring;
+        struct netxen_recv_context *recv_ctx = &adapter->recv_ctx;
 
         rq_size = SIZEOF_HOSTRQ_TX(nx_hostrq_tx_ctx_t);
         rq_addr = pci_alloc_consistent(adapter->pdev,
@@ -358,7 +359,7 @@ nx_fw_cmd_create_tx_ctx(struct netxen_adapter *adapter)
 
         prq->dummy_dma_addr = cpu_to_le64(adapter->dummy_dma.phys_addr);
 
-        offset = adapter->ctx_desc_phys_addr+sizeof(struct netxen_ring_ctx);
+        offset = recv_ctx->phys_addr + sizeof(struct netxen_ring_ctx);
         prq->cmd_cons_dma_addr = cpu_to_le64(offset);
 
         prq_cds = &prq->cds_ring;
@@ -541,14 +542,16 @@ netxen_init_old_ctx(struct netxen_adapter *adapter)
         struct nx_host_tx_ring *tx_ring;
         int ring;
         int port = adapter->portnum;
-        struct netxen_ring_ctx *hwctx = adapter->ctx_desc;
+        struct netxen_ring_ctx *hwctx;
         u32 signature;
 
-        tx_ring = &adapter->tx_ring;
+        tx_ring = adapter->tx_ring;
+        recv_ctx = &adapter->recv_ctx;
+        hwctx = recv_ctx->hwctx;
+
         hwctx->cmd_ring_addr = cpu_to_le64(tx_ring->phys_addr);
         hwctx->cmd_ring_size = cpu_to_le32(tx_ring->num_desc);
 
-        recv_ctx = &adapter->recv_ctx;
 
         for (ring = 0; ring < adapter->max_rds_rings; ring++) {
                 rds_ring = &recv_ctx->rds_rings[ring];
@@ -576,9 +579,9 @@ netxen_init_old_ctx(struct netxen_adapter *adapter)
                 NETXEN_CTX_SIGNATURE_V2 : NETXEN_CTX_SIGNATURE;
 
         NXWR32(adapter, CRB_CTX_ADDR_REG_LO(port),
-                        lower32(adapter->ctx_desc_phys_addr));
+                        lower32(recv_ctx->phys_addr));
         NXWR32(adapter, CRB_CTX_ADDR_REG_HI(port),
-                        upper32(adapter->ctx_desc_phys_addr));
+                        upper32(recv_ctx->phys_addr));
         NXWR32(adapter, CRB_CTX_SIGNATURE_REG(port),
                         signature | port);
         return 0;
@@ -592,25 +595,28 @@ int netxen_alloc_hw_resources(struct netxen_adapter *adapter)
         struct netxen_recv_context *recv_ctx;
         struct nx_host_rds_ring *rds_ring;
         struct nx_host_sds_ring *sds_ring;
-        struct nx_host_tx_ring *tx_ring = &adapter->tx_ring;
+        struct nx_host_tx_ring *tx_ring;
 
         struct pci_dev *pdev = adapter->pdev;
         struct net_device *netdev = adapter->netdev;
         int port = adapter->portnum;
 
+        recv_ctx = &adapter->recv_ctx;
+        tx_ring = adapter->tx_ring;
+
         addr = pci_alloc_consistent(pdev,
                         sizeof(struct netxen_ring_ctx) + sizeof(uint32_t),
-                        &adapter->ctx_desc_phys_addr);
-
+                        &recv_ctx->phys_addr);
         if (addr == NULL) {
                 dev_err(&pdev->dev, "failed to allocate hw context\n");
                 return -ENOMEM;
         }
+
         memset(addr, 0, sizeof(struct netxen_ring_ctx));
-        adapter->ctx_desc = (struct netxen_ring_ctx *)addr;
-        adapter->ctx_desc->ctx_id = cpu_to_le32(port);
-        adapter->ctx_desc->cmd_consumer_offset =
-                cpu_to_le64(adapter->ctx_desc_phys_addr +
+        recv_ctx->hwctx = (struct netxen_ring_ctx *)addr;
+        recv_ctx->hwctx->ctx_id = cpu_to_le32(port);
+        recv_ctx->hwctx->cmd_consumer_offset =
+                cpu_to_le64(recv_ctx->phys_addr +
                         sizeof(struct netxen_ring_ctx));
         tx_ring->hw_consumer =
                 (__le32 *)(((char *)addr) + sizeof(struct netxen_ring_ctx));
@@ -627,8 +633,6 @@ int netxen_alloc_hw_resources(struct netxen_adapter *adapter)
 
         tx_ring->desc_head = (struct cmd_desc_type0 *)addr;
 
-        recv_ctx = &adapter->recv_ctx;
-
         for (ring = 0; ring < adapter->max_rds_rings; ring++) {
                 rds_ring = &recv_ctx->rds_rings[ring];
                 addr = pci_alloc_consistent(adapter->pdev,
@@ -713,16 +717,18 @@ void netxen_free_hw_resources(struct netxen_adapter *adapter)
                 netxen_api_unlock(adapter);
         }
 
-        if (adapter->ctx_desc != NULL) {
+        recv_ctx = &adapter->recv_ctx;
+
+        if (recv_ctx->hwctx != NULL) {
                 pci_free_consistent(adapter->pdev,
                                 sizeof(struct netxen_ring_ctx) +
                                 sizeof(uint32_t),
-                                adapter->ctx_desc,
-                                adapter->ctx_desc_phys_addr);
-                adapter->ctx_desc = NULL;
+                                recv_ctx->hwctx,
+                                recv_ctx->phys_addr);
+                recv_ctx->hwctx = NULL;
         }
 
-        tx_ring = &adapter->tx_ring;
+        tx_ring = adapter->tx_ring;
         if (tx_ring->desc_head != NULL) {
                 pci_free_consistent(adapter->pdev,
                                 TX_DESC_RINGSIZE(tx_ring),
@@ -730,7 +736,6 @@ void netxen_free_hw_resources(struct netxen_adapter *adapter)
                 tx_ring->desc_head = NULL;
         }
 
-        recv_ctx = &adapter->recv_ctx;
         for (ring = 0; ring < adapter->max_rds_rings; ring++) {
                 rds_ring = &recv_ctx->rds_rings[ring];
 
diff --git a/drivers/net/netxen/netxen_nic_hw.c b/drivers/net/netxen/netxen_nic_hw.c
index 3bb2b8c74d9..db53d9cfad0 100644
--- a/drivers/net/netxen/netxen_nic_hw.c
+++ b/drivers/net/netxen/netxen_nic_hw.c
@@ -521,7 +521,7 @@ netxen_send_cmd_descs(struct netxen_adapter *adapter,
 
         i = 0;
 
-        tx_ring = &adapter->tx_ring;
+        tx_ring = adapter->tx_ring;
         netif_tx_lock_bh(adapter->netdev);
 
         producer = tx_ring->producer;
diff --git a/drivers/net/netxen/netxen_nic_init.c b/drivers/net/netxen/netxen_nic_init.c
index 8893a973399..363ef701e71 100644
--- a/drivers/net/netxen/netxen_nic_init.c
+++ b/drivers/net/netxen/netxen_nic_init.c
@@ -137,7 +137,7 @@ void netxen_release_tx_buffers(struct netxen_adapter *adapter)
         struct netxen_cmd_buffer *cmd_buf;
         struct netxen_skb_frag *buffrag;
         int i, j;
-        struct nx_host_tx_ring *tx_ring = &adapter->tx_ring;
+        struct nx_host_tx_ring *tx_ring = adapter->tx_ring;
 
         cmd_buf = tx_ring->cmd_buf_arr;
         for (i = 0; i < tx_ring->num_desc; i++) {
@@ -172,6 +172,10 @@ void netxen_free_sw_resources(struct netxen_adapter *adapter)
         int ring;
 
         recv_ctx = &adapter->recv_ctx;
+
+        if (recv_ctx->rds_rings == NULL)
+                goto skip_rds;
+
         for (ring = 0; ring < adapter->max_rds_rings; ring++) {
                 rds_ring = &recv_ctx->rds_rings[ring];
                 if (rds_ring->rx_buf_arr) {
@@ -179,11 +183,15 @@ void netxen_free_sw_resources(struct netxen_adapter *adapter)
                         rds_ring->rx_buf_arr = NULL;
                 }
         }
+        kfree(recv_ctx->rds_rings);
+
+skip_rds:
+        if (adapter->tx_ring == NULL)
+                return;
 
-        tx_ring = &adapter->tx_ring;
+        tx_ring = adapter->tx_ring;
         if (tx_ring->cmd_buf_arr)
                 vfree(tx_ring->cmd_buf_arr);
-        return;
 }
 
 int netxen_alloc_sw_resources(struct netxen_adapter *adapter)
@@ -191,17 +199,26 @@ int netxen_alloc_sw_resources(struct netxen_adapter *adapter)
         struct netxen_recv_context *recv_ctx;
         struct nx_host_rds_ring *rds_ring;
         struct nx_host_sds_ring *sds_ring;
-        struct nx_host_tx_ring *tx_ring = &adapter->tx_ring;
+        struct nx_host_tx_ring *tx_ring;
         struct netxen_rx_buffer *rx_buf;
-        int ring, i, num_rx_bufs;
+        int ring, i, size;
 
         struct netxen_cmd_buffer *cmd_buf_arr;
         struct net_device *netdev = adapter->netdev;
         struct pci_dev *pdev = adapter->pdev;
 
+        size = sizeof(struct nx_host_tx_ring);
+        tx_ring = kzalloc(size, GFP_KERNEL);
+        if (tx_ring == NULL) {
+                dev_err(&pdev->dev, "%s: failed to allocate tx ring struct\n",
+                       netdev->name);
+                return -ENOMEM;
+        }
+        adapter->tx_ring = tx_ring;
+
         tx_ring->num_desc = adapter->num_txd;
-        cmd_buf_arr =
-                (struct netxen_cmd_buffer *)vmalloc(TX_BUFF_RINGSIZE(tx_ring));
+
+        cmd_buf_arr = vmalloc(TX_BUFF_RINGSIZE(tx_ring));
         if (cmd_buf_arr == NULL) {
                 dev_err(&pdev->dev, "%s: failed to allocate cmd buffer ring\n",
                        netdev->name);
@@ -211,6 +228,16 @@ int netxen_alloc_sw_resources(struct netxen_adapter *adapter)
         tx_ring->cmd_buf_arr = cmd_buf_arr;
 
         recv_ctx = &adapter->recv_ctx;
+
+        size = adapter->max_rds_rings * sizeof (struct nx_host_rds_ring);
+        rds_ring = kzalloc(size, GFP_KERNEL);
+        if (rds_ring == NULL) {
+                dev_err(&pdev->dev, "%s: failed to allocate rds ring struct\n",
+                       netdev->name);
+                return -ENOMEM;
+        }
+        recv_ctx->rds_rings = rds_ring;
+
         for (ring = 0; ring < adapter->max_rds_rings; ring++) {
                 rds_ring = &recv_ctx->rds_rings[ring];
                 switch (ring) {
@@ -262,9 +289,8 @@ int netxen_alloc_sw_resources(struct netxen_adapter *adapter)
                  * Now go through all of them, set reference handles
                  * and put them in the queues.
                  */
-                num_rx_bufs = rds_ring->num_desc;
                 rx_buf = rds_ring->rx_buf_arr;
-                for (i = 0; i < num_rx_bufs; i++) {
+                for (i = 0; i < rds_ring->num_desc; i++) {
                         list_add_tail(&rx_buf->list,
                                         &rds_ring->free_list);
                         rx_buf->ref_handle = i;
@@ -1064,7 +1090,7 @@ int netxen_process_cmd_ring(struct netxen_adapter *adapter)
         struct net_device *netdev = adapter->netdev;
         struct netxen_skb_frag *frag;
         int done = 0;
-        struct nx_host_tx_ring *tx_ring = &adapter->tx_ring;
+        struct nx_host_tx_ring *tx_ring = adapter->tx_ring;
 
         if (!spin_trylock(&adapter->tx_clean_lock))
                 return 1;
diff --git a/drivers/net/netxen/netxen_nic_main.c b/drivers/net/netxen/netxen_nic_main.c
index 8331580fe16..07959fe06f2 100644
--- a/drivers/net/netxen/netxen_nic_main.c
+++ b/drivers/net/netxen/netxen_nic_main.c
@@ -857,7 +857,7 @@ netxen_nic_attach(struct netxen_adapter *adapter)
         }
 
         if (adapter->fw_major < 4) {
-                tx_ring = &adapter->tx_ring;
+                tx_ring = adapter->tx_ring;
                 tx_ring->crb_cmd_producer = crb_cmd_producer[adapter->portnum];
                 tx_ring->crb_cmd_consumer = crb_cmd_consumer[adapter->portnum];
 
@@ -1315,7 +1315,7 @@ static int
 netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
 {
         struct netxen_adapter *adapter = netdev_priv(netdev);
-        struct nx_host_tx_ring *tx_ring = &adapter->tx_ring;
+        struct nx_host_tx_ring *tx_ring = adapter->tx_ring;
         unsigned int first_seg_len = skb->len - skb->data_len;
         struct netxen_cmd_buffer *pbuf;
         struct netxen_skb_frag *buffrag;