via-velocity: separated struct allow wholesale copy during MTU changes.

It should help people fix the bugs in my code :o)

Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

1 files changed, 87 insertions, 86 deletions

diff --git a/drivers/net/via-velocity.c b/drivers/net/via-velocity.c
index 370ce30f2f45..ad3c6733bde7 100644
--- a/drivers/net/via-velocity.c
+++ b/drivers/net/via-velocity.c
@@ -677,16 +677,16 @@ static void velocity_rx_reset(struct velocity_info *vptr)
         struct mac_regs __iomem * regs = vptr->mac_regs;
         int i;
 
-        vptr->rd_dirty = vptr->rd_filled = vptr->rd_curr = 0;
+        vptr->rx.dirty = vptr->rx.filled = vptr->rx.curr = 0;
 
         /*
          *      Init state, all RD entries belong to the NIC
          */
         for (i = 0; i < vptr->options.numrx; ++i)
-                vptr->rd_ring[i].rdesc0.len |= OWNED_BY_NIC;
+                vptr->rx.ring[i].rdesc0.len |= OWNED_BY_NIC;
 
         writew(vptr->options.numrx, &regs->RBRDU);
-        writel(vptr->rd_pool_dma, &regs->RDBaseLo);
+        writel(vptr->rx.pool_dma, &regs->RDBaseLo);
         writew(0, &regs->RDIdx);
         writew(vptr->options.numrx - 1, &regs->RDCSize);
 }
@@ -779,15 +779,15 @@ static void velocity_init_registers(struct velocity_info *vptr,
 
                 vptr->int_mask = INT_MASK_DEF;
 
-                writel(vptr->rd_pool_dma, &regs->RDBaseLo);
+                writel(vptr->rx.pool_dma, &regs->RDBaseLo);
                 writew(vptr->options.numrx - 1, &regs->RDCSize);
                 mac_rx_queue_run(regs);
                 mac_rx_queue_wake(regs);
 
                 writew(vptr->options.numtx - 1, &regs->TDCSize);
 
-                for (i = 0; i < vptr->num_txq; i++) {
-                        writel(vptr->td_pool_dma[i], &regs->TDBaseLo[i]);
+                for (i = 0; i < vptr->tx.numq; i++) {
+                        writel(vptr->tx.pool_dma[i], &regs->TDBaseLo[i]);
                         mac_tx_queue_run(regs, i);
                 }
 
@@ -1047,7 +1047,7 @@ static void __devinit velocity_init_info(struct pci_dev *pdev,
 
         vptr->pdev = pdev;
         vptr->chip_id = info->chip_id;
-        vptr->num_txq = info->txqueue;
+        vptr->tx.numq = info->txqueue;
         vptr->multicast_limit = MCAM_SIZE;
         spin_lock_init(&vptr->lock);
         INIT_LIST_HEAD(&vptr->list);
@@ -1116,7 +1116,7 @@ static int velocity_init_rings(struct velocity_info *vptr)
          * pci_alloc_consistent() fulfills the requirement for 64 bytes
          * alignment
          */
-        pool = pci_alloc_consistent(pdev, tx_ring_size * vptr->num_txq +
+        pool = pci_alloc_consistent(pdev, tx_ring_size * vptr->tx.numq +
                                     rx_ring_size, &pool_dma);
         if (!pool) {
                 dev_err(&pdev->dev, "%s : DMA memory allocation failed.\n",
@@ -1124,15 +1124,15 @@ static int velocity_init_rings(struct velocity_info *vptr)
                 return -ENOMEM;
         }
 
-        vptr->rd_ring = pool;
-        vptr->rd_pool_dma = pool_dma;
+        vptr->rx.ring = pool;
+        vptr->rx.pool_dma = pool_dma;
 
         pool += rx_ring_size;
         pool_dma += rx_ring_size;
 
-        for (i = 0; i < vptr->num_txq; i++) {
-                vptr->td_rings[i] = pool;
-                vptr->td_pool_dma[i] = pool_dma;
+        for (i = 0; i < vptr->tx.numq; i++) {
+                vptr->tx.rings[i] = pool;
+                vptr->tx.pool_dma[i] = pool_dma;
                 pool += tx_ring_size;
                 pool_dma += tx_ring_size;
         }
@@ -1150,9 +1150,9 @@ static int velocity_init_rings(struct velocity_info *vptr)
 static void velocity_free_rings(struct velocity_info *vptr)
 {
         const int size = vptr->options.numrx * sizeof(struct rx_desc) +
-                vptr->options.numtx * sizeof(struct tx_desc) * vptr->num_txq;
+                vptr->options.numtx * sizeof(struct tx_desc) * vptr->tx.numq;
 
-        pci_free_consistent(vptr->pdev, size, vptr->rd_ring, vptr->rd_pool_dma);
+        pci_free_consistent(vptr->pdev, size, vptr->rx.ring, vptr->rx.pool_dma);
 }
 
 static void velocity_give_many_rx_descs(struct velocity_info *vptr)
@@ -1164,44 +1164,44 @@ static void velocity_give_many_rx_descs(struct velocity_info *vptr)
          * RD number must be equal to 4X per hardware spec
          * (programming guide rev 1.20, p.13)
          */
-        if (vptr->rd_filled < 4)
+        if (vptr->rx.filled < 4)
                 return;
 
         wmb();
 
-        unusable = vptr->rd_filled & 0x0003;
-        dirty = vptr->rd_dirty - unusable;
-        for (avail = vptr->rd_filled & 0xfffc; avail; avail--) {
+        unusable = vptr->rx.filled & 0x0003;
+        dirty = vptr->rx.dirty - unusable;
+        for (avail = vptr->rx.filled & 0xfffc; avail; avail--) {
                 dirty = (dirty > 0) ? dirty - 1 : vptr->options.numrx - 1;
-                vptr->rd_ring[dirty].rdesc0.len |= OWNED_BY_NIC;
+                vptr->rx.ring[dirty].rdesc0.len |= OWNED_BY_NIC;
         }
 
-        writew(vptr->rd_filled & 0xfffc, &regs->RBRDU);
-        vptr->rd_filled = unusable;
+        writew(vptr->rx.filled & 0xfffc, &regs->RBRDU);
+        vptr->rx.filled = unusable;
 }
 
 static int velocity_rx_refill(struct velocity_info *vptr)
 {
-        int dirty = vptr->rd_dirty, done = 0;
+        int dirty = vptr->rx.dirty, done = 0;
 
         do {
-                struct rx_desc *rd = vptr->rd_ring + dirty;
+                struct rx_desc *rd = vptr->rx.ring + dirty;
 
                 /* Fine for an all zero Rx desc at init time as well */
                 if (rd->rdesc0.len & OWNED_BY_NIC)
                         break;
 
-                if (!vptr->rd_info[dirty].skb) {
+                if (!vptr->rx.info[dirty].skb) {
                         if (velocity_alloc_rx_buf(vptr, dirty) < 0)
                                 break;
                 }
                 done++;
                 dirty = (dirty < vptr->options.numrx - 1) ? dirty + 1 : 0;
-        } while (dirty != vptr->rd_curr);
+        } while (dirty != vptr->rx.curr);
 
         if (done) {
-                vptr->rd_dirty = dirty;
-                vptr->rd_filled += done;
+                vptr->rx.dirty = dirty;
+                vptr->rx.filled += done;
         }
 
         return done;
@@ -1209,7 +1209,7 @@ static int velocity_rx_refill(struct velocity_info *vptr)
 
 static void velocity_set_rxbufsize(struct velocity_info *vptr, int mtu)
 {
-        vptr->rx_buf_sz = (mtu <= ETH_DATA_LEN) ? PKT_BUF_SZ : mtu + 32;
+        vptr->rx.buf_sz = (mtu <= ETH_DATA_LEN) ? PKT_BUF_SZ : mtu + 32;
 }
 
 /**
@@ -1224,12 +1224,12 @@ static int velocity_init_rd_ring(struct velocity_info *vptr)
 {
         int ret = -ENOMEM;
 
-        vptr->rd_info = kcalloc(vptr->options.numrx,
+        vptr->rx.info = kcalloc(vptr->options.numrx,
                                 sizeof(struct velocity_rd_info), GFP_KERNEL);
-        if (!vptr->rd_info)
+        if (!vptr->rx.info)
                 goto out;
 
-        vptr->rd_filled = vptr->rd_dirty = vptr->rd_curr = 0;
+        vptr->rx.filled = vptr->rx.dirty = vptr->rx.curr = 0;
 
         if (velocity_rx_refill(vptr) != vptr->options.numrx) {
                 VELOCITY_PRT(MSG_LEVEL_ERR, KERN_ERR
@@ -1255,18 +1255,18 @@ static void velocity_free_rd_ring(struct velocity_info *vptr)
 {
         int i;
 
-        if (vptr->rd_info == NULL)
+        if (vptr->rx.info == NULL)
                 return;
 
         for (i = 0; i < vptr->options.numrx; i++) {
-                struct velocity_rd_info *rd_info = &(vptr->rd_info[i]);
-                struct rx_desc *rd = vptr->rd_ring + i;
+                struct velocity_rd_info *rd_info = &(vptr->rx.info[i]);
+                struct rx_desc *rd = vptr->rx.ring + i;
 
                 memset(rd, 0, sizeof(*rd));
 
                 if (!rd_info->skb)
                         continue;
-                pci_unmap_single(vptr->pdev, rd_info->skb_dma, vptr->rx_buf_sz,
+                pci_unmap_single(vptr->pdev, rd_info->skb_dma, vptr->rx.buf_sz,
                                  PCI_DMA_FROMDEVICE);
                 rd_info->skb_dma = (dma_addr_t) NULL;
 
@@ -1274,8 +1274,8 @@ static void velocity_free_rd_ring(struct velocity_info *vptr)
                 rd_info->skb = NULL;
         }
 
-        kfree(vptr->rd_info);
-        vptr->rd_info = NULL;
+        kfree(vptr->rx.info);
+        vptr->rx.info = NULL;
 }
 
 /**
@@ -1293,19 +1293,19 @@ static int velocity_init_td_ring(struct velocity_info *vptr)
         unsigned int j;
 
         /* Init the TD ring entries */
-        for (j = 0; j < vptr->num_txq; j++) {
-                curr = vptr->td_pool_dma[j];
+        for (j = 0; j < vptr->tx.numq; j++) {
+                curr = vptr->tx.pool_dma[j];
 
-                vptr->td_infos[j] = kcalloc(vptr->options.numtx,
+                vptr->tx.infos[j] = kcalloc(vptr->options.numtx,
                                             sizeof(struct velocity_td_info),
                                             GFP_KERNEL);
-                if (!vptr->td_infos[j]) {
+                if (!vptr->tx.infos[j]) {
                         while(--j >= 0)
-                                kfree(vptr->td_infos[j]);
+                                kfree(vptr->tx.infos[j]);
                         return -ENOMEM;
                 }
 
-                vptr->td_tail[j] = vptr->td_curr[j] = vptr->td_used[j] = 0;
+                vptr->tx.tail[j] = vptr->tx.curr[j] = vptr->tx.used[j] = 0;
         }
         return 0;
 }
@@ -1317,7 +1317,7 @@ static int velocity_init_td_ring(struct velocity_info *vptr)
 static void velocity_free_td_ring_entry(struct velocity_info *vptr,
                                                          int q, int n)
 {
-        struct velocity_td_info * td_info = &(vptr->td_infos[q][n]);
+        struct velocity_td_info * td_info = &(vptr->tx.infos[q][n]);
         int i;
 
         if (td_info == NULL)
@@ -1349,15 +1349,15 @@ static void velocity_free_td_ring(struct velocity_info *vptr)
 {
         int i, j;
 
-        for (j = 0; j < vptr->num_txq; j++) {
-                if (vptr->td_infos[j] == NULL)
+        for (j = 0; j < vptr->tx.numq; j++) {
+                if (vptr->tx.infos[j] == NULL)
                         continue;
                 for (i = 0; i < vptr->options.numtx; i++) {
                         velocity_free_td_ring_entry(vptr, j, i);
 
                 }
-                kfree(vptr->td_infos[j]);
-                vptr->td_infos[j] = NULL;
+                kfree(vptr->tx.infos[j]);
+                vptr->tx.infos[j] = NULL;
         }
 }
 
@@ -1374,13 +1374,13 @@ static void velocity_free_td_ring(struct velocity_info *vptr)
 static int velocity_rx_srv(struct velocity_info *vptr, int status)
 {
         struct net_device_stats *stats = &vptr->stats;
-        int rd_curr = vptr->rd_curr;
+        int rd_curr = vptr->rx.curr;
         int works = 0;
 
         do {
-                struct rx_desc *rd = vptr->rd_ring + rd_curr;
+                struct rx_desc *rd = vptr->rx.ring + rd_curr;
 
-                if (!vptr->rd_info[rd_curr].skb)
+                if (!vptr->rx.info[rd_curr].skb)
                         break;
 
                 if (rd->rdesc0.len & OWNED_BY_NIC)
@@ -1412,7 +1412,7 @@ static int velocity_rx_srv(struct velocity_info *vptr, int status)
                         rd_curr = 0;
         } while (++works <= 15);
 
-        vptr->rd_curr = rd_curr;
+        vptr->rx.curr = rd_curr;
 
         if ((works > 0) && (velocity_rx_refill(vptr) > 0))
                 velocity_give_many_rx_descs(vptr);
@@ -1510,8 +1510,8 @@ static int velocity_receive_frame(struct velocity_info *vptr, int idx)
 {
         void (*pci_action)(struct pci_dev *, dma_addr_t, size_t, int);
         struct net_device_stats *stats = &vptr->stats;
-        struct velocity_rd_info *rd_info = &(vptr->rd_info[idx]);
-        struct rx_desc *rd = &(vptr->rd_ring[idx]);
+        struct velocity_rd_info *rd_info = &(vptr->rx.info[idx]);
+        struct rx_desc *rd = &(vptr->rx.ring[idx]);
         int pkt_len = le16_to_cpu(rd->rdesc0.len) & 0x3fff;
         struct sk_buff *skb;
 
@@ -1527,7 +1527,7 @@ static int velocity_receive_frame(struct velocity_info *vptr, int idx)
         skb = rd_info->skb;
 
         pci_dma_sync_single_for_cpu(vptr->pdev, rd_info->skb_dma,
-                                    vptr->rx_buf_sz, PCI_DMA_FROMDEVICE);
+                                    vptr->rx.buf_sz, PCI_DMA_FROMDEVICE);
 
         /*
          *      Drop frame not meeting IEEE 802.3
@@ -1550,7 +1550,7 @@ static int velocity_receive_frame(struct velocity_info *vptr, int idx)
                 rd_info->skb = NULL;
         }
 
-        pci_action(vptr->pdev, rd_info->skb_dma, vptr->rx_buf_sz,
+        pci_action(vptr->pdev, rd_info->skb_dma, vptr->rx.buf_sz,
                    PCI_DMA_FROMDEVICE);
 
         skb_put(skb, pkt_len - 4);
@@ -1580,10 +1580,10 @@ static int velocity_receive_frame(struct velocity_info *vptr, int idx)
 
 static int velocity_alloc_rx_buf(struct velocity_info *vptr, int idx)
 {
-        struct rx_desc *rd = &(vptr->rd_ring[idx]);
-        struct velocity_rd_info *rd_info = &(vptr->rd_info[idx]);
+        struct rx_desc *rd = &(vptr->rx.ring[idx]);
+        struct velocity_rd_info *rd_info = &(vptr->rx.info[idx]);
 
-        rd_info->skb = netdev_alloc_skb(vptr->dev, vptr->rx_buf_sz + 64);
+        rd_info->skb = dev_alloc_skb(vptr->rx.buf_sz + 64);
         if (rd_info->skb == NULL)
                 return -ENOMEM;
 
@@ -1592,14 +1592,15 @@ static int velocity_alloc_rx_buf(struct velocity_info *vptr, int idx)
          *      64byte alignment.
          */
         skb_reserve(rd_info->skb, (unsigned long) rd_info->skb->data & 63);
-        rd_info->skb_dma = pci_map_single(vptr->pdev, rd_info->skb->data, vptr->rx_buf_sz, PCI_DMA_FROMDEVICE);
+        rd_info->skb_dma = pci_map_single(vptr->pdev, rd_info->skb->data,
+                                        vptr->rx.buf_sz, PCI_DMA_FROMDEVICE);
 
         /*
          *      Fill in the descriptor to match
-         */
+         */
 
         *((u32 *) & (rd->rdesc0)) = 0;
-        rd->size = cpu_to_le16(vptr->rx_buf_sz) | RX_INTEN;
+        rd->size = cpu_to_le16(vptr->rx.buf_sz) | RX_INTEN;
         rd->pa_low = cpu_to_le32(rd_info->skb_dma);
         rd->pa_high = 0;
         return 0;
@@ -1625,15 +1626,15 @@ static int velocity_tx_srv(struct velocity_info *vptr, u32 status)
         struct velocity_td_info *tdinfo;
         struct net_device_stats *stats = &vptr->stats;
 
-        for (qnum = 0; qnum < vptr->num_txq; qnum++) {
-                for (idx = vptr->td_tail[qnum]; vptr->td_used[qnum] > 0;
+        for (qnum = 0; qnum < vptr->tx.numq; qnum++) {
+                for (idx = vptr->tx.tail[qnum]; vptr->tx.used[qnum] > 0;
                         idx = (idx + 1) % vptr->options.numtx) {
 
                         /*
                          *      Get Tx Descriptor
                          */
-                        td = &(vptr->td_rings[qnum][idx]);
-                        tdinfo = &(vptr->td_infos[qnum][idx]);
+                        td = &(vptr->tx.rings[qnum][idx]);
+                        tdinfo = &(vptr->tx.infos[qnum][idx]);
 
                         if (td->tdesc0.len & OWNED_BY_NIC)
                                 break;
@@ -1657,9 +1658,9 @@ static int velocity_tx_srv(struct velocity_info *vptr, u32 status)
                                 stats->tx_bytes += tdinfo->skb->len;
                         }
                         velocity_free_tx_buf(vptr, tdinfo);
-                        vptr->td_used[qnum]--;
+                        vptr->tx.used[qnum]--;
                 }
-                vptr->td_tail[qnum] = idx;
+                vptr->tx.tail[qnum] = idx;
 
                 if (AVAIL_TD(vptr, qnum) < 1) {
                         full = 1;
@@ -2056,9 +2057,9 @@ static int velocity_xmit(struct sk_buff *skb, struct net_device *dev)
 
         spin_lock_irqsave(&vptr->lock, flags);
 
-        index = vptr->td_curr[qnum];
-        td_ptr = &(vptr->td_rings[qnum][index]);
-        tdinfo = &(vptr->td_infos[qnum][index]);
+        index = vptr->tx.curr[qnum];
+        td_ptr = &(vptr->tx.rings[qnum][index]);
+        tdinfo = &(vptr->tx.infos[qnum][index]);
 
         td_ptr->tdesc1.TCR = TCR0_TIC;
         td_ptr->td_buf[0].size &= ~TD_QUEUE;
@@ -2071,9 +2072,9 @@ static int velocity_xmit(struct sk_buff *skb, struct net_device *dev)
                         skb_copy_from_linear_data(skb, tdinfo->buf, skb->len);
                         tdinfo->skb_dma[0] = tdinfo->buf_dma;
                         td_ptr->tdesc0.len = len;
-                        td_ptr->td_buf[0].pa_low = cpu_to_le32(tdinfo->skb_dma[0]);
-                        td_ptr->td_buf[0].pa_high = 0;
-                        td_ptr->td_buf[0].size = len;   /* queue is 0 anyway */
+                        td_ptr->tx.buf[0].pa_low = cpu_to_le32(tdinfo->skb_dma[0]);
+                        td_ptr->tx.buf[0].pa_high = 0;
+                        td_ptr->tx.buf[0].size = len;   /* queue is 0 anyway */
                         tdinfo->nskb_dma = 1;
                 } else {
                         int i = 0;
@@ -2084,9 +2085,9 @@ static int velocity_xmit(struct sk_buff *skb, struct net_device *dev)
                         td_ptr->tdesc0.len = len;
 
                         /* FIXME: support 48bit DMA later */
-                        td_ptr->td_buf[i].pa_low = cpu_to_le32(tdinfo->skb_dma);
-                        td_ptr->td_buf[i].pa_high = 0;
-                        td_ptr->td_buf[i].size = cpu_to_le16(skb_headlen(skb));
+                        td_ptr->tx.buf[i].pa_low = cpu_to_le32(tdinfo->skb_dma);
+                        td_ptr->tx.buf[i].pa_high = 0;
+                        td_ptr->tx.buf[i].size = cpu_to_le16(skb_headlen(skb));
 
                         for (i = 0; i < nfrags; i++) {
                                 skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
@@ -2094,9 +2095,9 @@ static int velocity_xmit(struct sk_buff *skb, struct net_device *dev)
 
                                 tdinfo->skb_dma[i + 1] = pci_map_single(vptr->pdev, addr, frag->size, PCI_DMA_TODEVICE);
 
-                                td_ptr->td_buf[i + 1].pa_low = cpu_to_le32(tdinfo->skb_dma[i + 1]);
-                                td_ptr->td_buf[i + 1].pa_high = 0;
-                                td_ptr->td_buf[i + 1].size = cpu_to_le16(frag->size);
+                                td_ptr->tx.buf[i + 1].pa_low = cpu_to_le32(tdinfo->skb_dma[i + 1]);
+                                td_ptr->tx.buf[i + 1].pa_high = 0;
+                                td_ptr->tx.buf[i + 1].size = cpu_to_le16(frag->size);
                         }
                         tdinfo->nskb_dma = i - 1;
                 }
@@ -2142,13 +2143,13 @@ static int velocity_xmit(struct sk_buff *skb, struct net_device *dev)
                 if (prev < 0)
                         prev = vptr->options.numtx - 1;
                 td_ptr->tdesc0.len |= OWNED_BY_NIC;
-                vptr->td_used[qnum]++;
-                vptr->td_curr[qnum] = (index + 1) % vptr->options.numtx;
+                vptr->tx.used[qnum]++;
+                vptr->tx.curr[qnum] = (index + 1) % vptr->options.numtx;
 
                 if (AVAIL_TD(vptr, qnum) < 1)
                         netif_stop_queue(dev);
 
-                td_ptr = &(vptr->td_rings[qnum][prev]);
+                td_ptr = &(vptr->tx.rings[qnum][prev]);
                 td_ptr->td_buf[0].size |= TD_QUEUE;
                 mac_tx_queue_wake(vptr->mac_regs, qnum);
         }
@@ -3405,8 +3406,8 @@ static int velocity_resume(struct pci_dev *pdev)
 
         velocity_tx_srv(vptr, 0);
 
-        for (i = 0; i < vptr->num_txq; i++) {
-                if (vptr->td_used[i]) {
+        for (i = 0; i < vptr->tx.numq; i++) {
+                if (vptr->tx.used[i]) {
                         mac_tx_queue_wake(vptr->mac_regs, i);
                 }
         }