diff options
Diffstat (limited to 'target/linux/generic/patches-4.1/760-8139cp-fixes-from-4.3.patch')
| -rw-r--r-- | target/linux/generic/patches-4.1/760-8139cp-fixes-from-4.3.patch | 365 |
1 files changed, 0 insertions, 365 deletions
diff --git a/target/linux/generic/patches-4.1/760-8139cp-fixes-from-4.3.patch b/target/linux/generic/patches-4.1/760-8139cp-fixes-from-4.3.patch deleted file mode 100644 index 832e425632..0000000000 --- a/target/linux/generic/patches-4.1/760-8139cp-fixes-from-4.3.patch +++ /dev/null @@ -1,365 +0,0 @@ -commit 41b976414c88016e2c9d9b2f6667ee67a998d388 -Author: David Woodhouse <David.Woodhouse@intel.com> -Date: Wed Sep 23 09:45:31 2015 +0100 - - 8139cp: Dump contents of descriptor ring on TX timeout - - We are seeing unexplained TX timeouts under heavy load. Let's try to get - a better idea of what's going on. - - Signed-off-by: David Woodhouse <David.Woodhouse@intel.com> - Signed-off-by: David S. Miller <davem@davemloft.net> - -commit 7f4c685633e2df9ba10d49a31dda13715745db37 -Author: David Woodhouse <David.Woodhouse@intel.com> -Date: Wed Sep 23 09:45:16 2015 +0100 - - 8139cp: Fix DMA unmapping of transmitted buffers - - The low 16 bits of the 'opts1' field in the TX descriptor are supposed - to still contain the buffer length when the descriptor is handed back to - us. In practice, at least on my hardware, they don't. So stash the - original value of the opts1 field and get the length to unmap from - there. - - There are other ways we could have worked out the length, but I actually - want a stash of the opts1 field anyway so that I can dump it alongside - the contents of the descriptor ring when we suffer a TX timeout. - - Signed-off-by: David Woodhouse <David.Woodhouse@intel.com> - Signed-off-by: David S. Miller <davem@davemloft.net> - -commit 0a5aeee0b79fa99d8e04c98dd4e87d4f52aa497b -Author: David Woodhouse <David.Woodhouse@intel.com> -Date: Wed Sep 23 09:44:57 2015 +0100 - - 8139cp: Reduce duplicate csum/tso code in cp_start_xmit() - - We calculate the value of the opts1 descriptor field in three different - places. With two different behaviours when given an invalid packet to - be checksummed — none of them correct. Sort that out. - - Signed-off-by: David Woodhouse <David.Woodhouse@intel.com> - Signed-off-by: David S. Miller <davem@davemloft.net> - -commit a3b804043f490aeec57d8ca5baccdd35e6250857 -Author: David Woodhouse <David.Woodhouse@intel.com> -Date: Wed Sep 23 09:44:38 2015 +0100 - - 8139cp: Fix TSO/scatter-gather descriptor setup - - When sending a TSO frame in multiple buffers, we were neglecting to set - the first descriptor up in TSO mode. - - Signed-off-by: David Woodhouse <David.Woodhouse@intel.com> - Signed-off-by: David S. Miller <davem@davemloft.net> - -commit 26b0bad6ac3a0167792dc4ffb276c29bc597d239 -Author: David Woodhouse <David.Woodhouse@intel.com> -Date: Wed Sep 23 09:44:06 2015 +0100 - - 8139cp: Fix tx_queued debug message to print correct slot numbers - - After a certain amount of staring at the debug output of this driver, I - realised it was lying to me. - - Signed-off-by: David Woodhouse <David.Woodhouse@intel.com> - Signed-off-by: David S. Miller <davem@davemloft.net> - -commit aaa0062ecf4877a26dea66bee1039c6eaf906c94 -Author: David Woodhouse <David.Woodhouse@intel.com> -Date: Wed Sep 23 09:43:41 2015 +0100 - - 8139cp: Do not re-enable RX interrupts in cp_tx_timeout() - - If an RX interrupt was already received but NAPI has not yet run when - the RX timeout happens, we end up in cp_tx_timeout() with RX interrupts - already disabled. Blindly re-enabling them will cause an IRQ storm. - - (This is made particularly horrid by the fact that cp_interrupt() always - returns that it's handled the interrupt, even when it hasn't actually - done anything. If it didn't do that, the core IRQ code would have - detected the storm and handled it, I'd have had a clear smoking gun - backtrace instead of just a spontaneously resetting router, and I'd have - at *least* two days of my life back. Changing the return value of - cp_interrupt() will be argued about under separate cover.) - - Unconditionally leave RX interrupts disabled after the reset, and - schedule NAPI to check the receive ring and re-enable them. - - Signed-off-by: David Woodhouse <David.Woodhouse@intel.com> - Signed-off-by: David S. Miller <davem@davemloft.net> - -commit 7a8a8e75d505147358b225173e890ada43a267e2 -Author: David Woodhouse <dwmw2@infradead.org> -Date: Fri Sep 18 00:21:54 2015 +0100 - - 8139cp: Call __cp_set_rx_mode() from cp_tx_timeout() - - Unless we reset the RX config, on real hardware I don't seem to receive - any packets after a TX timeout. - - Signed-off-by: David Woodhouse <David.Woodhouse@intel.com> - Signed-off-by: David S. Miller <davem@davemloft.net> - -commit fc27bd115b334e3ebdc682a42a47c3aea2566dcc -Author: David Woodhouse <dwmw2@infradead.org> -Date: Fri Sep 18 00:19:08 2015 +0100 - - 8139cp: Use dev_kfree_skb_any() instead of dev_kfree_skb() in cp_clean_rings() - - This can be called from cp_tx_timeout() with interrupts disabled. - Spotted by Francois Romieu <romieu@fr.zoreil.com> - - Signed-off-by: David Woodhouse <David.Woodhouse@intel.com> - Signed-off-by: David S. Miller <davem@davemloft.net> ---- a/drivers/net/ethernet/realtek/8139cp.c -+++ b/drivers/net/ethernet/realtek/8139cp.c -@@ -157,6 +157,7 @@ enum { - NWayAdvert = 0x66, /* MII ADVERTISE */ - NWayLPAR = 0x68, /* MII LPA */ - NWayExpansion = 0x6A, /* MII Expansion */ -+ TxDmaOkLowDesc = 0x82, /* Low 16 bit address of a Tx descriptor. */ - Config5 = 0xD8, /* Config5 */ - TxPoll = 0xD9, /* Tell chip to check Tx descriptors for work */ - RxMaxSize = 0xDA, /* Max size of an Rx packet (8169 only) */ -@@ -341,6 +342,7 @@ struct cp_private { - unsigned tx_tail; - struct cp_desc *tx_ring; - struct sk_buff *tx_skb[CP_TX_RING_SIZE]; -+ u32 tx_opts[CP_TX_RING_SIZE]; - - unsigned rx_buf_sz; - unsigned wol_enabled : 1; /* Is Wake-on-LAN enabled? */ -@@ -665,7 +667,7 @@ static void cp_tx (struct cp_private *cp - BUG_ON(!skb); - - dma_unmap_single(&cp->pdev->dev, le64_to_cpu(txd->addr), -- le32_to_cpu(txd->opts1) & 0xffff, -+ cp->tx_opts[tx_tail] & 0xffff, - PCI_DMA_TODEVICE); - - if (status & LastFrag) { -@@ -733,7 +735,7 @@ static netdev_tx_t cp_start_xmit (struct - { - struct cp_private *cp = netdev_priv(dev); - unsigned entry; -- u32 eor, flags; -+ u32 eor, opts1; - unsigned long intr_flags; - __le32 opts2; - int mss = 0; -@@ -753,6 +755,21 @@ static netdev_tx_t cp_start_xmit (struct - mss = skb_shinfo(skb)->gso_size; - - opts2 = cpu_to_le32(cp_tx_vlan_tag(skb)); -+ opts1 = DescOwn; -+ if (mss) -+ opts1 |= LargeSend | ((mss & MSSMask) << MSSShift); -+ else if (skb->ip_summed == CHECKSUM_PARTIAL) { -+ const struct iphdr *ip = ip_hdr(skb); -+ if (ip->protocol == IPPROTO_TCP) -+ opts1 |= IPCS | TCPCS; -+ else if (ip->protocol == IPPROTO_UDP) -+ opts1 |= IPCS | UDPCS; -+ else { -+ WARN_ONCE(1, -+ "Net bug: asked to checksum invalid Legacy IP packet\n"); -+ goto out_dma_error; -+ } -+ } - - if (skb_shinfo(skb)->nr_frags == 0) { - struct cp_desc *txd = &cp->tx_ring[entry]; -@@ -768,31 +785,20 @@ static netdev_tx_t cp_start_xmit (struct - txd->addr = cpu_to_le64(mapping); - wmb(); - -- flags = eor | len | DescOwn | FirstFrag | LastFrag; -- -- if (mss) -- flags |= LargeSend | ((mss & MSSMask) << MSSShift); -- else if (skb->ip_summed == CHECKSUM_PARTIAL) { -- const struct iphdr *ip = ip_hdr(skb); -- if (ip->protocol == IPPROTO_TCP) -- flags |= IPCS | TCPCS; -- else if (ip->protocol == IPPROTO_UDP) -- flags |= IPCS | UDPCS; -- else -- WARN_ON(1); /* we need a WARN() */ -- } -+ opts1 |= eor | len | FirstFrag | LastFrag; - -- txd->opts1 = cpu_to_le32(flags); -+ txd->opts1 = cpu_to_le32(opts1); - wmb(); - - cp->tx_skb[entry] = skb; -- entry = NEXT_TX(entry); -+ cp->tx_opts[entry] = opts1; -+ netif_dbg(cp, tx_queued, cp->dev, "tx queued, slot %d, skblen %d\n", -+ entry, skb->len); - } else { - struct cp_desc *txd; -- u32 first_len, first_eor; -+ u32 first_len, first_eor, ctrl; - dma_addr_t first_mapping; - int frag, first_entry = entry; -- const struct iphdr *ip = ip_hdr(skb); - - /* We must give this initial chunk to the device last. - * Otherwise we could race with the device. -@@ -805,14 +811,14 @@ static netdev_tx_t cp_start_xmit (struct - goto out_dma_error; - - cp->tx_skb[entry] = skb; -- entry = NEXT_TX(entry); - - for (frag = 0; frag < skb_shinfo(skb)->nr_frags; frag++) { - const skb_frag_t *this_frag = &skb_shinfo(skb)->frags[frag]; - u32 len; -- u32 ctrl; - dma_addr_t mapping; - -+ entry = NEXT_TX(entry); -+ - len = skb_frag_size(this_frag); - mapping = dma_map_single(&cp->pdev->dev, - skb_frag_address(this_frag), -@@ -824,19 +830,7 @@ static netdev_tx_t cp_start_xmit (struct - - eor = (entry == (CP_TX_RING_SIZE - 1)) ? RingEnd : 0; - -- ctrl = eor | len | DescOwn; -- -- if (mss) -- ctrl |= LargeSend | -- ((mss & MSSMask) << MSSShift); -- else if (skb->ip_summed == CHECKSUM_PARTIAL) { -- if (ip->protocol == IPPROTO_TCP) -- ctrl |= IPCS | TCPCS; -- else if (ip->protocol == IPPROTO_UDP) -- ctrl |= IPCS | UDPCS; -- else -- BUG(); -- } -+ ctrl = opts1 | eor | len; - - if (frag == skb_shinfo(skb)->nr_frags - 1) - ctrl |= LastFrag; -@@ -849,8 +843,8 @@ static netdev_tx_t cp_start_xmit (struct - txd->opts1 = cpu_to_le32(ctrl); - wmb(); - -+ cp->tx_opts[entry] = ctrl; - cp->tx_skb[entry] = skb; -- entry = NEXT_TX(entry); - } - - txd = &cp->tx_ring[first_entry]; -@@ -858,27 +852,17 @@ static netdev_tx_t cp_start_xmit (struct - txd->addr = cpu_to_le64(first_mapping); - wmb(); - -- if (skb->ip_summed == CHECKSUM_PARTIAL) { -- if (ip->protocol == IPPROTO_TCP) -- txd->opts1 = cpu_to_le32(first_eor | first_len | -- FirstFrag | DescOwn | -- IPCS | TCPCS); -- else if (ip->protocol == IPPROTO_UDP) -- txd->opts1 = cpu_to_le32(first_eor | first_len | -- FirstFrag | DescOwn | -- IPCS | UDPCS); -- else -- BUG(); -- } else -- txd->opts1 = cpu_to_le32(first_eor | first_len | -- FirstFrag | DescOwn); -+ ctrl = opts1 | first_eor | first_len | FirstFrag; -+ txd->opts1 = cpu_to_le32(ctrl); - wmb(); -+ -+ cp->tx_opts[first_entry] = ctrl; -+ netif_dbg(cp, tx_queued, cp->dev, "tx queued, slots %d-%d, skblen %d\n", -+ first_entry, entry, skb->len); - } -- cp->tx_head = entry; -+ cp->tx_head = NEXT_TX(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)) - netif_stop_queue(dev); - -@@ -1115,6 +1099,7 @@ static int cp_init_rings (struct cp_priv - { - memset(cp->tx_ring, 0, sizeof(struct cp_desc) * CP_TX_RING_SIZE); - cp->tx_ring[CP_TX_RING_SIZE - 1].opts1 = cpu_to_le32(RingEnd); -+ memset(cp->tx_opts, 0, sizeof(cp->tx_opts)); - - cp_init_rings_index(cp); - -@@ -1151,7 +1136,7 @@ static void cp_clean_rings (struct cp_pr - desc = cp->rx_ring + i; - dma_unmap_single(&cp->pdev->dev,le64_to_cpu(desc->addr), - cp->rx_buf_sz, PCI_DMA_FROMDEVICE); -- dev_kfree_skb(cp->rx_skb[i]); -+ dev_kfree_skb_any(cp->rx_skb[i]); - } - } - -@@ -1164,7 +1149,7 @@ static void cp_clean_rings (struct cp_pr - le32_to_cpu(desc->opts1) & 0xffff, - PCI_DMA_TODEVICE); - if (le32_to_cpu(desc->opts1) & LastFrag) -- dev_kfree_skb(skb); -+ dev_kfree_skb_any(skb); - cp->dev->stats.tx_dropped++; - } - } -@@ -1172,6 +1157,7 @@ static void cp_clean_rings (struct cp_pr - - memset(cp->rx_ring, 0, sizeof(struct cp_desc) * CP_RX_RING_SIZE); - memset(cp->tx_ring, 0, sizeof(struct cp_desc) * CP_TX_RING_SIZE); -+ memset(cp->tx_opts, 0, sizeof(cp->tx_opts)); - - memset(cp->rx_skb, 0, sizeof(struct sk_buff *) * CP_RX_RING_SIZE); - memset(cp->tx_skb, 0, sizeof(struct sk_buff *) * CP_TX_RING_SIZE); -@@ -1249,7 +1235,7 @@ static void cp_tx_timeout(struct net_dev - { - struct cp_private *cp = netdev_priv(dev); - unsigned long flags; -- int rc; -+ int rc, i; - - netdev_warn(dev, "Transmit timeout, status %2x %4x %4x %4x\n", - cpr8(Cmd), cpr16(CpCmd), -@@ -1257,13 +1243,26 @@ static void cp_tx_timeout(struct net_dev - - spin_lock_irqsave(&cp->lock, flags); - -+ netif_dbg(cp, tx_err, cp->dev, "TX ring head %d tail %d desc %x\n", -+ cp->tx_head, cp->tx_tail, cpr16(TxDmaOkLowDesc)); -+ for (i = 0; i < CP_TX_RING_SIZE; i++) { -+ netif_dbg(cp, tx_err, cp->dev, -+ "TX slot %d @%p: %08x (%08x) %08x %llx %p\n", -+ i, &cp->tx_ring[i], le32_to_cpu(cp->tx_ring[i].opts1), -+ cp->tx_opts[i], le32_to_cpu(cp->tx_ring[i].opts2), -+ le64_to_cpu(cp->tx_ring[i].addr), -+ cp->tx_skb[i]); -+ } -+ - cp_stop_hw(cp); - cp_clean_rings(cp); - rc = cp_init_rings(cp); - cp_start_hw(cp); -- cp_enable_irq(cp); -+ __cp_set_rx_mode(dev); -+ cpw16_f(IntrMask, cp_norx_intr_mask); - - netif_wake_queue(dev); -+ napi_schedule_irqoff(&cp->napi); - - spin_unlock_irqrestore(&cp->lock, flags); - } |