mirror of https://github.com/hak5/openwrt.git
175 lines
5.7 KiB
Diff
175 lines
5.7 KiB
Diff
commit 01ffc0a7f1c1801a2354719dedbc32aff45b987d
|
|
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>
|
|
|
|
commit 871f0d4c153e1258d4becf306eca6761bf38b629
|
|
Author: David Woodhouse <dwmw2@infradead.org>
|
|
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>
|
|
|
|
--- 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
|
|
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_privat
|
|
|
|
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_priva
|
|
|
|
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_priv
|
|
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_privat
|
|
|
|
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_dev
|
|
cp_clean_rings(cp);
|
|
rc = cp_init_rings(cp);
|
|
cp_start_hw(cp);
|
|
+ cp_enable_irq(cp);
|
|
|
|
netif_wake_queue(dev);
|
|
|