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kernel: Fix 8139cp ring buffer initialisation, tx timeout recovery, add BQL
Patches queued upstream in net-next.git Signed-off-by: David Woodhouse <David.Woodhouse@intel.com> Signed-off-by: Gabor Juhos <juhosg@openwrt.org> git-svn-id: svn://svn.openwrt.org/openwrt/trunk@34415 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
juhosg
parent
4e3096c90d
commit
97b2abe1a3
189
target/linux/generic/patches-3.3/065-8139cp-fixes.patch
Normal file
189
target/linux/generic/patches-3.3/065-8139cp-fixes.patch
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@ -0,0 +1,189 @@
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commit 01ffc0a7f1c1801a2354719dedbc32aff45b987d
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Author: David Woodhouse <dwmw2@infradead.org>
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Date: Sat Nov 24 12:11:21 2012 +0000
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8139cp: re-enable interrupts after tx timeout
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Recovery doesn't work too well if we leave interrupts disabled...
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Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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Acked-by: Francois Romieu <romieu@fr.zoreil.com>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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commit 871f0d4c153e1258d4becf306eca6761bf38b629
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Author: David Woodhouse <dwmw2@infradead.org>
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Date: Thu Nov 22 03:16:58 2012 +0000
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8139cp: enable bql
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This adds support for byte queue limits on RTL8139C+
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Tested on real hardware.
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Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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Acked-By: Dave Täht <dave.taht@bufferbloat.net>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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commit a9dbe40fc10cea2efe6e1ff9e03c62dd7579c5ba
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Author: David Woodhouse <dwmw2@infradead.org>
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Date: Wed Nov 21 10:27:19 2012 +0000
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8139cp: set ring address after enabling C+ mode
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This fixes (for me) a regression introduced by commit b01af457 ("8139cp:
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set ring address before enabling receiver"). That commit configured the
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descriptor ring addresses earlier in the initialisation sequence, in
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order to avoid the possibility of triggering stray DMA before the
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correct address had been set up.
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Unfortunately, it seems that the hardware will scribble garbage into the
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TxRingAddr registers when we enable "plus mode" Tx in the CpCmd
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register. Observed on a Traverse Geos router board.
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To deal with this, while not reintroducing the problem which led to the
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original commit, we augment cp_start_hw() to write to the CpCmd register
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*first*, then set the descriptor ring addresses, and then finally to
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enable Rx and Tx in the original 8139 Cmd register. The datasheet
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actually indicates that we should enable Tx/Rx in the Cmd register
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*before* configuring the descriptor addresses, but that would appear to
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re-introduce the problem that the offending commit b01af457 was trying
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to solve. And this variant appears to work fine on real hardware.
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Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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Cc: stable@kernel.org [3.5+]
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Signed-off-by: David S. Miller <davem@davemloft.net>
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commit 071e3ef4a94a021b16a2912f3885c86f4ff36b49
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Author: David S. Miller <davem@davemloft.net>
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Date: Sun Nov 25 15:52:09 2012 -0500
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Revert "8139cp: revert "set ring address before enabling receiver""
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This reverts commit b26623dab7eeb1e9f5898c7a49458789dd492f20.
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This reverts the revert, in net-next we'll try another scheme
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to fix this bug using patches from David Woodhouse.
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Signed-off-by: David S. Miller <davem@davemloft.net>
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diff --git a/drivers/net/ethernet/realtek/8139cp.c b/drivers/net/ethernet/realtek/8139cp.c
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index b01f83a..6cb96b4 100644
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--- a/drivers/net/ethernet/realtek/8139cp.c
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+++ b/drivers/net/ethernet/realtek/8139cp.c
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@@ -648,6 +648,7 @@ static void cp_tx (struct cp_private *cp)
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{
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unsigned tx_head = cp->tx_head;
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unsigned tx_tail = cp->tx_tail;
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+ unsigned bytes_compl = 0, pkts_compl = 0;
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while (tx_tail != tx_head) {
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struct cp_desc *txd = cp->tx_ring + tx_tail;
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@@ -666,6 +667,9 @@ static void cp_tx (struct cp_private *cp)
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le32_to_cpu(txd->opts1) & 0xffff,
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PCI_DMA_TODEVICE);
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+ bytes_compl += skb->len;
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+ pkts_compl++;
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+
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if (status & LastFrag) {
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if (status & (TxError | TxFIFOUnder)) {
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netif_dbg(cp, tx_err, cp->dev,
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@@ -697,6 +701,7 @@ static void cp_tx (struct cp_private *cp)
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cp->tx_tail = tx_tail;
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+ netdev_completed_queue(cp->dev, pkts_compl, bytes_compl);
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if (TX_BUFFS_AVAIL(cp) > (MAX_SKB_FRAGS + 1))
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netif_wake_queue(cp->dev);
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}
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@@ -843,6 +848,8 @@ static netdev_tx_t cp_start_xmit (struct sk_buff *skb,
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wmb();
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}
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cp->tx_head = entry;
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+
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+ netdev_sent_queue(dev, skb->len);
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netif_dbg(cp, tx_queued, cp->dev, "tx queued, slot %d, skblen %d\n",
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entry, skb->len);
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if (TX_BUFFS_AVAIL(cp) <= (MAX_SKB_FRAGS + 1))
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@@ -937,6 +944,8 @@ static void cp_stop_hw (struct cp_private *cp)
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cp->rx_tail = 0;
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cp->tx_head = cp->tx_tail = 0;
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+
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+ netdev_reset_queue(cp->dev);
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}
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static void cp_reset_hw (struct cp_private *cp)
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@@ -957,8 +966,38 @@ static void cp_reset_hw (struct cp_private *cp)
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static inline void cp_start_hw (struct cp_private *cp)
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{
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+ dma_addr_t ring_dma;
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+
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cpw16(CpCmd, cp->cpcmd);
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+
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+ /*
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+ * These (at least TxRingAddr) need to be configured after the
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+ * corresponding bits in CpCmd are enabled. Datasheet v1.6 §6.33
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+ * (C+ Command Register) recommends that these and more be configured
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+ * *after* the [RT]xEnable bits in CpCmd are set. And on some hardware
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+ * it's been observed that the TxRingAddr is actually reset to garbage
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+ * when C+ mode Tx is enabled in CpCmd.
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+ */
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+ cpw32_f(HiTxRingAddr, 0);
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+ cpw32_f(HiTxRingAddr + 4, 0);
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+
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+ ring_dma = cp->ring_dma;
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+ cpw32_f(RxRingAddr, ring_dma & 0xffffffff);
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+ cpw32_f(RxRingAddr + 4, (ring_dma >> 16) >> 16);
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+
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+ ring_dma += sizeof(struct cp_desc) * CP_RX_RING_SIZE;
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+ cpw32_f(TxRingAddr, ring_dma & 0xffffffff);
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+ cpw32_f(TxRingAddr + 4, (ring_dma >> 16) >> 16);
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+
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+ /*
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+ * Strictly speaking, the datasheet says this should be enabled
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+ * *before* setting the descriptor addresses. But what, then, would
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+ * prevent it from doing DMA to random unconfigured addresses?
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+ * This variant appears to work fine.
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+ */
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cpw8(Cmd, RxOn | TxOn);
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+
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+ netdev_reset_queue(cp->dev);
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}
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static void cp_enable_irq(struct cp_private *cp)
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@@ -969,7 +1008,6 @@ static void cp_enable_irq(struct cp_private *cp)
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static void cp_init_hw (struct cp_private *cp)
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{
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struct net_device *dev = cp->dev;
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- dma_addr_t ring_dma;
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cp_reset_hw(cp);
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@@ -992,17 +1030,6 @@ static void cp_init_hw (struct cp_private *cp)
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cpw8(Config5, cpr8(Config5) & PMEStatus);
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- cpw32_f(HiTxRingAddr, 0);
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- cpw32_f(HiTxRingAddr + 4, 0);
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-
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- ring_dma = cp->ring_dma;
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- cpw32_f(RxRingAddr, ring_dma & 0xffffffff);
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- cpw32_f(RxRingAddr + 4, (ring_dma >> 16) >> 16);
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-
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- ring_dma += sizeof(struct cp_desc) * CP_RX_RING_SIZE;
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- cpw32_f(TxRingAddr, ring_dma & 0xffffffff);
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- cpw32_f(TxRingAddr + 4, (ring_dma >> 16) >> 16);
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-
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cpw16(MultiIntr, 0);
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cpw8_f(Cfg9346, Cfg9346_Lock);
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@@ -1192,6 +1219,7 @@ static void cp_tx_timeout(struct net_device *dev)
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cp_clean_rings(cp);
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rc = cp_init_rings(cp);
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cp_start_hw(cp);
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+ cp_enable_irq(cp);
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netif_wake_queue(dev);
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176
target/linux/generic/patches-3.6/065-8139cp-fixes.patch
Normal file
176
target/linux/generic/patches-3.6/065-8139cp-fixes.patch
Normal file
@ -0,0 +1,176 @@
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commit 01ffc0a7f1c1801a2354719dedbc32aff45b987d
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Author: David Woodhouse <dwmw2@infradead.org>
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Date: Sat Nov 24 12:11:21 2012 +0000
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8139cp: re-enable interrupts after tx timeout
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Recovery doesn't work too well if we leave interrupts disabled...
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Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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Acked-by: Francois Romieu <romieu@fr.zoreil.com>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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commit 871f0d4c153e1258d4becf306eca6761bf38b629
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Author: David Woodhouse <dwmw2@infradead.org>
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Date: Thu Nov 22 03:16:58 2012 +0000
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8139cp: enable bql
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This adds support for byte queue limits on RTL8139C+
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Tested on real hardware.
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Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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Acked-By: Dave Täht <dave.taht@bufferbloat.net>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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commit a9dbe40fc10cea2efe6e1ff9e03c62dd7579c5ba
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Author: David Woodhouse <dwmw2@infradead.org>
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Date: Wed Nov 21 10:27:19 2012 +0000
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8139cp: set ring address after enabling C+ mode
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This fixes (for me) a regression introduced by commit b01af457 ("8139cp:
|
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set ring address before enabling receiver"). That commit configured the
|
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descriptor ring addresses earlier in the initialisation sequence, in
|
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order to avoid the possibility of triggering stray DMA before the
|
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correct address had been set up.
|
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|
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Unfortunately, it seems that the hardware will scribble garbage into the
|
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TxRingAddr registers when we enable "plus mode" Tx in the CpCmd
|
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register. Observed on a Traverse Geos router board.
|
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|
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To deal with this, while not reintroducing the problem which led to the
|
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original commit, we augment cp_start_hw() to write to the CpCmd register
|
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*first*, then set the descriptor ring addresses, and then finally to
|
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enable Rx and Tx in the original 8139 Cmd register. The datasheet
|
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actually indicates that we should enable Tx/Rx in the Cmd register
|
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*before* configuring the descriptor addresses, but that would appear to
|
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re-introduce the problem that the offending commit b01af457 was trying
|
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to solve. And this variant appears to work fine on real hardware.
|
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Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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Cc: stable@kernel.org [3.5+]
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Signed-off-by: David S. Miller <davem@davemloft.net>
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diff --git a/drivers/net/ethernet/realtek/8139cp.c b/drivers/net/ethernet/realtek/8139cp.c
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index 1c81825..6cb96b4 100644
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--- a/drivers/net/ethernet/realtek/8139cp.c
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+++ b/drivers/net/ethernet/realtek/8139cp.c
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@@ -648,6 +648,7 @@ static void cp_tx (struct cp_private *cp)
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{
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unsigned tx_head = cp->tx_head;
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unsigned tx_tail = cp->tx_tail;
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+ unsigned bytes_compl = 0, pkts_compl = 0;
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while (tx_tail != tx_head) {
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struct cp_desc *txd = cp->tx_ring + tx_tail;
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@@ -666,6 +667,9 @@ static void cp_tx (struct cp_private *cp)
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le32_to_cpu(txd->opts1) & 0xffff,
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PCI_DMA_TODEVICE);
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+ bytes_compl += skb->len;
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+ pkts_compl++;
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+
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if (status & LastFrag) {
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if (status & (TxError | TxFIFOUnder)) {
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netif_dbg(cp, tx_err, cp->dev,
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@@ -697,6 +701,7 @@ static void cp_tx (struct cp_private *cp)
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cp->tx_tail = tx_tail;
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+ netdev_completed_queue(cp->dev, pkts_compl, bytes_compl);
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if (TX_BUFFS_AVAIL(cp) > (MAX_SKB_FRAGS + 1))
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netif_wake_queue(cp->dev);
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}
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@@ -843,6 +848,8 @@ static netdev_tx_t cp_start_xmit (struct sk_buff *skb,
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wmb();
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}
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cp->tx_head = entry;
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+
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+ netdev_sent_queue(dev, skb->len);
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netif_dbg(cp, tx_queued, cp->dev, "tx queued, slot %d, skblen %d\n",
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entry, skb->len);
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if (TX_BUFFS_AVAIL(cp) <= (MAX_SKB_FRAGS + 1))
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@@ -937,6 +944,8 @@ static void cp_stop_hw (struct cp_private *cp)
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cp->rx_tail = 0;
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cp->tx_head = cp->tx_tail = 0;
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+
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+ netdev_reset_queue(cp->dev);
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}
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static void cp_reset_hw (struct cp_private *cp)
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@@ -957,8 +966,38 @@ static void cp_reset_hw (struct cp_private *cp)
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static inline void cp_start_hw (struct cp_private *cp)
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{
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+ dma_addr_t ring_dma;
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+
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cpw16(CpCmd, cp->cpcmd);
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+
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+ /*
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+ * These (at least TxRingAddr) need to be configured after the
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+ * corresponding bits in CpCmd are enabled. Datasheet v1.6 §6.33
|
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+ * (C+ Command Register) recommends that these and more be configured
|
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+ * *after* the [RT]xEnable bits in CpCmd are set. And on some hardware
|
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+ * it's been observed that the TxRingAddr is actually reset to garbage
|
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+ * when C+ mode Tx is enabled in CpCmd.
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+ */
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+ cpw32_f(HiTxRingAddr, 0);
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+ cpw32_f(HiTxRingAddr + 4, 0);
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+
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+ ring_dma = cp->ring_dma;
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+ cpw32_f(RxRingAddr, ring_dma & 0xffffffff);
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+ cpw32_f(RxRingAddr + 4, (ring_dma >> 16) >> 16);
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+
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+ ring_dma += sizeof(struct cp_desc) * CP_RX_RING_SIZE;
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+ cpw32_f(TxRingAddr, ring_dma & 0xffffffff);
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+ cpw32_f(TxRingAddr + 4, (ring_dma >> 16) >> 16);
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+
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+ /*
|
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+ * Strictly speaking, the datasheet says this should be enabled
|
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+ * *before* setting the descriptor addresses. But what, then, would
|
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+ * prevent it from doing DMA to random unconfigured addresses?
|
||||
+ * This variant appears to work fine.
|
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+ */
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cpw8(Cmd, RxOn | TxOn);
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+
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+ netdev_reset_queue(cp->dev);
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}
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static void cp_enable_irq(struct cp_private *cp)
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@@ -969,7 +1008,6 @@ static void cp_enable_irq(struct cp_private *cp)
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static void cp_init_hw (struct cp_private *cp)
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{
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struct net_device *dev = cp->dev;
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- dma_addr_t ring_dma;
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cp_reset_hw(cp);
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@@ -979,17 +1017,6 @@ static void cp_init_hw (struct cp_private *cp)
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cpw32_f (MAC0 + 0, le32_to_cpu (*(__le32 *) (dev->dev_addr + 0)));
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cpw32_f (MAC0 + 4, le32_to_cpu (*(__le32 *) (dev->dev_addr + 4)));
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- cpw32_f(HiTxRingAddr, 0);
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- cpw32_f(HiTxRingAddr + 4, 0);
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-
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- ring_dma = cp->ring_dma;
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- cpw32_f(RxRingAddr, ring_dma & 0xffffffff);
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- cpw32_f(RxRingAddr + 4, (ring_dma >> 16) >> 16);
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-
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- ring_dma += sizeof(struct cp_desc) * CP_RX_RING_SIZE;
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- cpw32_f(TxRingAddr, ring_dma & 0xffffffff);
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- cpw32_f(TxRingAddr + 4, (ring_dma >> 16) >> 16);
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-
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cp_start_hw(cp);
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cpw8(TxThresh, 0x06); /* XXX convert magic num to a constant */
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@@ -1192,6 +1219,7 @@ static void cp_tx_timeout(struct net_device *dev)
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cp_clean_rings(cp);
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rc = cp_init_rings(cp);
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cp_start_hw(cp);
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+ cp_enable_irq(cp);
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netif_wake_queue(dev);
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|
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189
target/linux/generic/patches-3.7/065-8139cp-fixes.patch
Normal file
189
target/linux/generic/patches-3.7/065-8139cp-fixes.patch
Normal file
@ -0,0 +1,189 @@
|
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commit 01ffc0a7f1c1801a2354719dedbc32aff45b987d
|
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Author: David Woodhouse <dwmw2@infradead.org>
|
||||
Date: Sat Nov 24 12:11:21 2012 +0000
|
||||
|
||||
8139cp: re-enable interrupts after tx timeout
|
||||
|
||||
Recovery doesn't work too well if we leave interrupts disabled...
|
||||
|
||||
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
|
||||
Acked-by: Francois Romieu <romieu@fr.zoreil.com>
|
||||
Signed-off-by: David S. Miller <davem@davemloft.net>
|
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|
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commit 871f0d4c153e1258d4becf306eca6761bf38b629
|
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Author: David Woodhouse <dwmw2@infradead.org>
|
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Date: Thu Nov 22 03:16:58 2012 +0000
|
||||
|
||||
8139cp: enable bql
|
||||
|
||||
This adds support for byte queue limits on RTL8139C+
|
||||
|
||||
Tested on real hardware.
|
||||
|
||||
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
|
||||
Acked-By: Dave Täht <dave.taht@bufferbloat.net>
|
||||
Signed-off-by: David S. Miller <davem@davemloft.net>
|
||||
|
||||
commit a9dbe40fc10cea2efe6e1ff9e03c62dd7579c5ba
|
||||
Author: David Woodhouse <dwmw2@infradead.org>
|
||||
Date: Wed Nov 21 10:27:19 2012 +0000
|
||||
|
||||
8139cp: set ring address after enabling C+ mode
|
||||
|
||||
This fixes (for me) a regression introduced by commit b01af457 ("8139cp:
|
||||
set ring address before enabling receiver"). That commit configured the
|
||||
descriptor ring addresses earlier in the initialisation sequence, in
|
||||
order to avoid the possibility of triggering stray DMA before the
|
||||
correct address had been set up.
|
||||
|
||||
Unfortunately, it seems that the hardware will scribble garbage into the
|
||||
TxRingAddr registers when we enable "plus mode" Tx in the CpCmd
|
||||
register. Observed on a Traverse Geos router board.
|
||||
|
||||
To deal with this, while not reintroducing the problem which led to the
|
||||
original commit, we augment cp_start_hw() to write to the CpCmd register
|
||||
*first*, then set the descriptor ring addresses, and then finally to
|
||||
enable Rx and Tx in the original 8139 Cmd register. The datasheet
|
||||
actually indicates that we should enable Tx/Rx in the Cmd register
|
||||
*before* configuring the descriptor addresses, but that would appear to
|
||||
re-introduce the problem that the offending commit b01af457 was trying
|
||||
to solve. And this variant appears to work fine on real hardware.
|
||||
|
||||
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
|
||||
Cc: stable@kernel.org [3.5+]
|
||||
Signed-off-by: David S. Miller <davem@davemloft.net>
|
||||
|
||||
commit 071e3ef4a94a021b16a2912f3885c86f4ff36b49
|
||||
Author: David S. Miller <davem@davemloft.net>
|
||||
Date: Sun Nov 25 15:52:09 2012 -0500
|
||||
|
||||
Revert "8139cp: revert "set ring address before enabling receiver""
|
||||
|
||||
This reverts commit b26623dab7eeb1e9f5898c7a49458789dd492f20.
|
||||
|
||||
This reverts the revert, in net-next we'll try another scheme
|
||||
to fix this bug using patches from David Woodhouse.
|
||||
|
||||
Signed-off-by: David S. Miller <davem@davemloft.net>
|
||||
|
||||
diff --git a/drivers/net/ethernet/realtek/8139cp.c b/drivers/net/ethernet/realtek/8139cp.c
|
||||
index b01f83a..6cb96b4 100644
|
||||
--- a/drivers/net/ethernet/realtek/8139cp.c
|
||||
+++ b/drivers/net/ethernet/realtek/8139cp.c
|
||||
@@ -648,6 +648,7 @@ static void cp_tx (struct cp_private *cp)
|
||||
{
|
||||
unsigned tx_head = cp->tx_head;
|
||||
unsigned tx_tail = cp->tx_tail;
|
||||
+ unsigned bytes_compl = 0, pkts_compl = 0;
|
||||
|
||||
while (tx_tail != tx_head) {
|
||||
struct cp_desc *txd = cp->tx_ring + tx_tail;
|
||||
@@ -666,6 +667,9 @@ static void cp_tx (struct cp_private *cp)
|
||||
le32_to_cpu(txd->opts1) & 0xffff,
|
||||
PCI_DMA_TODEVICE);
|
||||
|
||||
+ bytes_compl += skb->len;
|
||||
+ pkts_compl++;
|
||||
+
|
||||
if (status & LastFrag) {
|
||||
if (status & (TxError | TxFIFOUnder)) {
|
||||
netif_dbg(cp, tx_err, cp->dev,
|
||||
@@ -697,6 +701,7 @@ static void cp_tx (struct cp_private *cp)
|
||||
|
||||
cp->tx_tail = tx_tail;
|
||||
|
||||
+ netdev_completed_queue(cp->dev, pkts_compl, bytes_compl);
|
||||
if (TX_BUFFS_AVAIL(cp) > (MAX_SKB_FRAGS + 1))
|
||||
netif_wake_queue(cp->dev);
|
||||
}
|
||||
@@ -843,6 +848,8 @@ static netdev_tx_t cp_start_xmit (struct sk_buff *skb,
|
||||
wmb();
|
||||
}
|
||||
cp->tx_head = entry;
|
||||
+
|
||||
+ netdev_sent_queue(dev, skb->len);
|
||||
netif_dbg(cp, tx_queued, cp->dev, "tx queued, slot %d, skblen %d\n",
|
||||
entry, skb->len);
|
||||
if (TX_BUFFS_AVAIL(cp) <= (MAX_SKB_FRAGS + 1))
|
||||
@@ -937,6 +944,8 @@ static void cp_stop_hw (struct cp_private *cp)
|
||||
|
||||
cp->rx_tail = 0;
|
||||
cp->tx_head = cp->tx_tail = 0;
|
||||
+
|
||||
+ netdev_reset_queue(cp->dev);
|
||||
}
|
||||
|
||||
static void cp_reset_hw (struct cp_private *cp)
|
||||
@@ -957,8 +966,38 @@ static void cp_reset_hw (struct cp_private *cp)
|
||||
|
||||
static inline void cp_start_hw (struct cp_private *cp)
|
||||
{
|
||||
+ dma_addr_t ring_dma;
|
||||
+
|
||||
cpw16(CpCmd, cp->cpcmd);
|
||||
+
|
||||
+ /*
|
||||
+ * These (at least TxRingAddr) need to be configured after the
|
||||
+ * corresponding bits in CpCmd are enabled. Datasheet v1.6 §6.33
|
||||
+ * (C+ Command Register) recommends that these and more be configured
|
||||
+ * *after* the [RT]xEnable bits in CpCmd are set. And on some hardware
|
||||
+ * it's been observed that the TxRingAddr is actually reset to garbage
|
||||
+ * when C+ mode Tx is enabled in CpCmd.
|
||||
+ */
|
||||
+ cpw32_f(HiTxRingAddr, 0);
|
||||
+ cpw32_f(HiTxRingAddr + 4, 0);
|
||||
+
|
||||
+ ring_dma = cp->ring_dma;
|
||||
+ cpw32_f(RxRingAddr, ring_dma & 0xffffffff);
|
||||
+ cpw32_f(RxRingAddr + 4, (ring_dma >> 16) >> 16);
|
||||
+
|
||||
+ ring_dma += sizeof(struct cp_desc) * CP_RX_RING_SIZE;
|
||||
+ cpw32_f(TxRingAddr, ring_dma & 0xffffffff);
|
||||
+ cpw32_f(TxRingAddr + 4, (ring_dma >> 16) >> 16);
|
||||
+
|
||||
+ /*
|
||||
+ * Strictly speaking, the datasheet says this should be enabled
|
||||
+ * *before* setting the descriptor addresses. But what, then, would
|
||||
+ * prevent it from doing DMA to random unconfigured addresses?
|
||||
+ * This variant appears to work fine.
|
||||
+ */
|
||||
cpw8(Cmd, RxOn | TxOn);
|
||||
+
|
||||
+ netdev_reset_queue(cp->dev);
|
||||
}
|
||||
|
||||
static void cp_enable_irq(struct cp_private *cp)
|
||||
@@ -969,7 +1008,6 @@ static void cp_enable_irq(struct cp_private *cp)
|
||||
static void cp_init_hw (struct cp_private *cp)
|
||||
{
|
||||
struct net_device *dev = cp->dev;
|
||||
- dma_addr_t ring_dma;
|
||||
|
||||
cp_reset_hw(cp);
|
||||
|
||||
@@ -992,17 +1030,6 @@ static void cp_init_hw (struct cp_private *cp)
|
||||
|
||||
cpw8(Config5, cpr8(Config5) & PMEStatus);
|
||||
|
||||
- cpw32_f(HiTxRingAddr, 0);
|
||||
- cpw32_f(HiTxRingAddr + 4, 0);
|
||||
-
|
||||
- ring_dma = cp->ring_dma;
|
||||
- cpw32_f(RxRingAddr, ring_dma & 0xffffffff);
|
||||
- cpw32_f(RxRingAddr + 4, (ring_dma >> 16) >> 16);
|
||||
-
|
||||
- ring_dma += sizeof(struct cp_desc) * CP_RX_RING_SIZE;
|
||||
- cpw32_f(TxRingAddr, ring_dma & 0xffffffff);
|
||||
- cpw32_f(TxRingAddr + 4, (ring_dma >> 16) >> 16);
|
||||
-
|
||||
cpw16(MultiIntr, 0);
|
||||
|
||||
cpw8_f(Cfg9346, Cfg9346_Lock);
|
||||
@@ -1192,6 +1219,7 @@ static void cp_tx_timeout(struct net_device *dev)
|
||||
cp_clean_rings(cp);
|
||||
rc = cp_init_rings(cp);
|
||||
cp_start_hw(cp);
|
||||
+ cp_enable_irq(cp);
|
||||
|
||||
netif_wake_queue(dev);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user