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lantiq: 4.19: fix panic when using the DMA API

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With kernel 4.19 the DMA API relies on a struct device to work properly.
Backport upstream patches which passed a struct device instead of NULL
to the DMA API.

Fixes kernel panics during boot.

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Mathias Kresin <dev@kresin.me>
This commit is contained in:
Martin Blumenstingl 2019-07-02 07:25:58 +02:00 committed by Mathias Kresin
parent 961b8efb5b
commit 7305e2057a
5 changed files with 127 additions and 32 deletions
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43
target/linux/lantiq/patches-4.19/0005-lantiq_etop-pass-struct-device-to-DMA-API-functions.patch Normal file
View File

@ -0,0 +1,43 @@
From 74e0deb89a8ba27c132b1f0e08643e215b5c1f92 Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Mon, 11 Feb 2019 14:20:00 +0100
Subject: [PATCH] lantiq_etop: pass struct device to DMA API functions
The DMA API generally relies on a struct device to work properly, and
only barely works without one for legacy reasons. Pass the easily
available struct device from the platform_device to remedy this.
Note this driver seems to lack dma_unmap_* calls entirely, but fixing
that is left for another time.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
drivers/net/ethernet/lantiq_etop.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
--- a/drivers/net/ethernet/lantiq_etop.c
+++ b/drivers/net/ethernet/lantiq_etop.c
@@ -112,10 +112,12 @@ struct ltq_etop_priv {
static int
ltq_etop_alloc_skb(struct ltq_etop_chan *ch)
{
+ struct ltq_etop_priv *priv = netdev_priv(ch->netdev);
+
ch->skb[ch->dma.desc] = netdev_alloc_skb(ch->netdev, MAX_DMA_DATA_LEN);
if (!ch->skb[ch->dma.desc])
return -ENOMEM;
- ch->dma.desc_base[ch->dma.desc].addr = dma_map_single(NULL,
+ ch->dma.desc_base[ch->dma.desc].addr = dma_map_single(&priv->pdev->dev,
ch->skb[ch->dma.desc]->data, MAX_DMA_DATA_LEN,
DMA_FROM_DEVICE);
ch->dma.desc_base[ch->dma.desc].addr =
@@ -493,7 +495,7 @@ ltq_etop_tx(struct sk_buff *skb, struct
netif_trans_update(dev);
spin_lock_irqsave(&priv->lock, flags);
- desc->addr = ((unsigned int) dma_map_single(NULL, skb->data, len,
+ desc->addr = ((unsigned int) dma_map_single(&priv->pdev->dev, skb->data, len,
DMA_TO_DEVICE)) - byte_offset;
wmb();
desc->ctl = LTQ_DMA_OWN | LTQ_DMA_SOP | LTQ_DMA_EOP |

50
target/linux/lantiq/patches-4.19/0006-MIPS-lantiq-pass-struct-device-to-DMA-API-functions.patch Normal file
View File

@ -0,0 +1,50 @@
From 74f03104ed465ff71b11076ef620e4eaa53dbf74 Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Fri, 1 Feb 2019 09:47:44 +0100
Subject: [PATCH] MIPS: lantiq: pass struct device to DMA API functions
The DMA API generally relies on a struct device to work properly, and
only barely works without one for legacy reasons. Pass the easily
available struct device from the platform_device to remedy this.
Also use GFP_KERNEL instead of GFP_ATOMIC as the gfp_t for the memory
allocation, as we aren't in interrupt context or under a lock.
Note that this whole function looks somewhat bogus given that we never
even look at the returned dma address, and the CPHYSADDR magic on
a returned noncached mapping looks "interesting". But I'll leave
that to people more familiar with the code to sort out.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Paul Burton <paul.burton@mips.com>
Cc: John Crispin <john@phrozen.org>
Cc: Vinod Koul <vkoul@kernel.org>
Cc: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
Cc: Nicolas Ferre <nicolas.ferre@microchip.com>
Cc: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Cc: Felipe Balbi <balbi@kernel.org>
Cc: linux-mips@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: dmaengine@vger.kernel.org
Cc: netdev@vger.kernel.org
Cc: linux-usb@vger.kernel.org
Cc: linux-fbdev@vger.kernel.org
Cc: alsa-devel@alsa-project.org
Cc: iommu@lists.linux-foundation.org
---
arch/mips/lantiq/xway/vmmc.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/arch/mips/lantiq/xway/vmmc.c
+++ b/arch/mips/lantiq/xway/vmmc.c
@@ -31,8 +31,8 @@ static int vmmc_probe(struct platform_de
dma_addr_t dma;
cp1_base =
- (void *) CPHYSADDR(dma_alloc_coherent(NULL, CP1_SIZE,
- &dma, GFP_ATOMIC));
+ (void *) CPHYSADDR(dma_alloc_coherent(&pdev->dev, CP1_SIZE,
+ &dma, GFP_KERNEL));
gpio_count = of_gpio_count(pdev->dev.of_node);
while (gpio_count > 0) {

60
target/linux/lantiq/patches-4.19/0028-NET-lantiq-various-etop-fixes.patch
View File

@ -152,7 +152,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
struct net_device *netdev;
struct napi_struct napi;
struct ltq_dma_channel dma;
@@ -98,21 +150,34 @@ struct ltq_etop_chan {
@@ -98,23 +150,36 @@ struct ltq_etop_chan {
struct ltq_etop_priv {
struct net_device *netdev;
struct platform_device *pdev;
@ -178,7 +178,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
+ struct clk *clk_ppe;
+ struct clk *clk_switch;
+ struct clk *clk_ephy;
+ struct clk *clk_ephycgu;
+ struct clk *clk_ephycgu
};
+static int ltq_etop_mdio_wr(struct mii_bus *bus, int phy_addr,
@ -187,12 +187,14 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
static int
ltq_etop_alloc_skb(struct ltq_etop_chan *ch)
{
struct ltq_etop_priv *priv = netdev_priv(ch->netdev);
- ch->skb[ch->dma.desc] = netdev_alloc_skb(ch->netdev, MAX_DMA_DATA_LEN);
+ ch->skb[ch->dma.desc] = dev_alloc_skb(MAX_DMA_DATA_LEN);
if (!ch->skb[ch->dma.desc])
return -ENOMEM;
ch->dma.desc_base[ch->dma.desc].addr = dma_map_single(NULL,
@@ -147,8 +212,11 @@ ltq_etop_hw_receive(struct ltq_etop_chan
ch->dma.desc_base[ch->dma.desc].addr = dma_map_single(&priv->pdev->dev,
@@ -149,8 +214,11 @@ ltq_etop_hw_receive(struct ltq_etop_chan
spin_unlock_irqrestore(&priv->lock, flags);
skb_put(skb, len);
@ -204,7 +206,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
}
static int
@@ -156,7 +224,9 @@ ltq_etop_poll_rx(struct napi_struct *nap
@@ -158,7 +226,9 @@ ltq_etop_poll_rx(struct napi_struct *nap
{
struct ltq_etop_chan *ch = container_of(napi,
struct ltq_etop_chan, napi);
@ -214,7 +216,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
while (work_done < budget) {
struct ltq_dma_desc *desc = &ch->dma.desc_base[ch->dma.desc];
@@ -168,7 +238,9 @@ ltq_etop_poll_rx(struct napi_struct *nap
@@ -170,7 +240,9 @@ ltq_etop_poll_rx(struct napi_struct *nap
}
if (work_done < budget) {
napi_complete_done(&ch->napi, work_done);
@ -224,7 +226,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
}
return work_done;
}
@@ -180,12 +252,14 @@ ltq_etop_poll_tx(struct napi_struct *nap
@@ -182,12 +254,14 @@ ltq_etop_poll_tx(struct napi_struct *nap
container_of(napi, struct ltq_etop_chan, napi);
struct ltq_etop_priv *priv = netdev_priv(ch->netdev);
struct netdev_queue *txq =
@ -240,7 +242,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
dev_kfree_skb_any(ch->skb[ch->tx_free]);
ch->skb[ch->tx_free] = NULL;
memset(&ch->dma.desc_base[ch->tx_free], 0,
@@ -198,7 +272,9 @@ ltq_etop_poll_tx(struct napi_struct *nap
@@ -200,7 +274,9 @@ ltq_etop_poll_tx(struct napi_struct *nap
if (netif_tx_queue_stopped(txq))
netif_tx_start_queue(txq);
napi_complete(&ch->napi);
@ -250,7 +252,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
return 1;
}
@@ -206,9 +282,10 @@ static irqreturn_t
@@ -208,9 +284,10 @@ static irqreturn_t
ltq_etop_dma_irq(int irq, void *_priv)
{
struct ltq_etop_priv *priv = _priv;
@ -264,7 +266,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
return IRQ_HANDLED;
}
@@ -220,7 +297,7 @@ ltq_etop_free_channel(struct net_device
@@ -222,7 +299,7 @@ ltq_etop_free_channel(struct net_device
ltq_dma_free(&ch->dma);
if (ch->dma.irq)
free_irq(ch->dma.irq, priv);
@ -273,7 +275,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
int desc;
for (desc = 0; desc < LTQ_DESC_NUM; desc++)
dev_kfree_skb_any(ch->skb[ch->dma.desc]);
@@ -231,66 +308,135 @@ static void
@@ -233,66 +310,135 @@ static void
ltq_etop_hw_exit(struct net_device *dev)
{
struct ltq_etop_priv *priv = netdev_priv(dev);
@ -444,7 +446,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
}
static void
@@ -309,6 +455,39 @@ static const struct ethtool_ops ltq_etop
@@ -311,6 +457,39 @@ static const struct ethtool_ops ltq_etop
};
static int
@ -484,7 +486,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
ltq_etop_mdio_wr(struct mii_bus *bus, int phy_addr, int phy_reg, u16 phy_data)
{
u32 val = MDIO_REQUEST |
@@ -316,9 +495,9 @@ ltq_etop_mdio_wr(struct mii_bus *bus, in
@@ -318,9 +497,9 @@ ltq_etop_mdio_wr(struct mii_bus *bus, in
((phy_reg & MDIO_REG_MASK) << MDIO_REG_OFFSET) |
phy_data;
@ -496,7 +498,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
return 0;
}
@@ -329,12 +508,12 @@ ltq_etop_mdio_rd(struct mii_bus *bus, in
@@ -331,12 +510,12 @@ ltq_etop_mdio_rd(struct mii_bus *bus, in
((phy_addr & MDIO_ADDR_MASK) << MDIO_ADDR_OFFSET) |
((phy_reg & MDIO_REG_MASK) << MDIO_REG_OFFSET);
@ -513,7 +515,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
return val;
}
@@ -349,8 +528,18 @@ ltq_etop_mdio_probe(struct net_device *d
@@ -351,8 +530,18 @@ ltq_etop_mdio_probe(struct net_device *d
{
struct ltq_etop_priv *priv = netdev_priv(dev);
struct phy_device *phydev;
@ -533,7 +535,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
if (!phydev) {
netdev_err(dev, "no PHY found\n");
@@ -358,21 +547,18 @@ ltq_etop_mdio_probe(struct net_device *d
@@ -360,21 +549,18 @@ ltq_etop_mdio_probe(struct net_device *d
}
phydev = phy_connect(dev, phydev_name(phydev),
@ -560,7 +562,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
phydev->advertising = phydev->supported;
phy_attached_info(phydev);
@@ -393,8 +579,13 @@ ltq_etop_mdio_init(struct net_device *de
@@ -395,8 +581,13 @@ ltq_etop_mdio_init(struct net_device *de
}
priv->mii_bus->priv = dev;
@ -576,7 +578,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
priv->mii_bus->name = "ltq_mii";
snprintf(priv->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x",
priv->pdev->name, priv->pdev->id);
@@ -431,17 +622,19 @@ static int
@@ -433,17 +624,19 @@ static int
ltq_etop_open(struct net_device *dev)
{
struct ltq_etop_priv *priv = netdev_priv(dev);
@ -605,7 +607,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
netif_tx_start_all_queues(dev);
return 0;
}
@@ -450,18 +643,19 @@ static int
@@ -452,18 +645,19 @@ static int
ltq_etop_stop(struct net_device *dev)
{
struct ltq_etop_priv *priv = netdev_priv(dev);
@ -635,7 +637,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
return 0;
}
@@ -471,16 +665,16 @@ ltq_etop_tx(struct sk_buff *skb, struct
@@ -473,16 +667,16 @@ ltq_etop_tx(struct sk_buff *skb, struct
int queue = skb_get_queue_mapping(skb);
struct netdev_queue *txq = netdev_get_tx_queue(dev, queue);
struct ltq_etop_priv *priv = netdev_priv(dev);
@ -657,7 +659,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
netdev_err(dev, "tx ring full\n");
netif_tx_stop_queue(txq);
return NETDEV_TX_BUSY;
@@ -488,7 +682,7 @@ ltq_etop_tx(struct sk_buff *skb, struct
@@ -490,7 +684,7 @@ ltq_etop_tx(struct sk_buff *skb, struct
/* dma needs to start on a 16 byte aligned address */
byte_offset = CPHYSADDR(skb->data) % 16;
@ -666,7 +668,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
netif_trans_update(dev);
@@ -498,11 +692,11 @@ ltq_etop_tx(struct sk_buff *skb, struct
@@ -500,11 +694,11 @@ ltq_etop_tx(struct sk_buff *skb, struct
wmb();
desc->ctl = LTQ_DMA_OWN | LTQ_DMA_SOP | LTQ_DMA_EOP |
LTQ_DMA_TX_OFFSET(byte_offset) | (len & LTQ_DMA_SIZE_MASK);
@ -681,7 +683,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
netif_tx_stop_queue(txq);
return NETDEV_TX_OK;
@@ -516,8 +710,10 @@ ltq_etop_change_mtu(struct net_device *d
@@ -518,8 +712,10 @@ ltq_etop_change_mtu(struct net_device *d
dev->mtu = new_mtu;
@ -693,7 +695,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
spin_unlock_irqrestore(&priv->lock, flags);
return 0;
@@ -577,6 +773,9 @@ ltq_etop_init(struct net_device *dev)
@@ -579,6 +775,9 @@ ltq_etop_init(struct net_device *dev)
if (err)
goto err_hw;
ltq_etop_change_mtu(dev, 1500);
@ -703,7 +705,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
memcpy(&mac, &priv->pldata->mac, sizeof(struct sockaddr));
if (!is_valid_ether_addr(mac.sa_data)) {
@@ -594,9 +793,10 @@ ltq_etop_init(struct net_device *dev)
@@ -596,9 +795,10 @@ ltq_etop_init(struct net_device *dev)
dev->addr_assign_type = NET_ADDR_RANDOM;
ltq_etop_set_multicast_list(dev);
@ -717,7 +719,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
return 0;
err_netdev:
@@ -616,6 +816,9 @@ ltq_etop_tx_timeout(struct net_device *d
@@ -618,6 +818,9 @@ ltq_etop_tx_timeout(struct net_device *d
err = ltq_etop_hw_init(dev);
if (err)
goto err_hw;
@ -727,7 +729,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
netif_trans_update(dev);
netif_wake_queue(dev);
return;
@@ -639,14 +842,19 @@ static const struct net_device_ops ltq_e
@@ -641,14 +844,19 @@ static const struct net_device_ops ltq_e
.ndo_tx_timeout = ltq_etop_tx_timeout,
};
@ -751,7 +753,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
@@ -672,31 +880,62 @@ ltq_etop_probe(struct platform_device *p
@@ -674,31 +882,62 @@ ltq_etop_probe(struct platform_device *p
goto err_out;
}
@ -829,7 +831,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
err = register_netdev(dev);
if (err)
@@ -725,31 +964,22 @@ ltq_etop_remove(struct platform_device *
@@ -727,31 +966,22 @@ ltq_etop_remove(struct platform_device *
return 0;
}

2
target/linux/lantiq/patches-4.19/0035-owrt-lantiq-wifi-and-ethernet-eeprom-handling.patch
View File

@ -203,7 +203,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
+early_param("ethaddr", setup_ethaddr);
--- a/drivers/net/ethernet/lantiq_etop.c
+++ b/drivers/net/ethernet/lantiq_etop.c
@@ -777,7 +777,11 @@ ltq_etop_init(struct net_device *dev)
@@ -779,7 +779,11 @@ ltq_etop_init(struct net_device *dev)
if (err)
goto err_hw;

4
target/linux/lantiq/patches-4.19/0701-NET-lantiq-etop-of-mido.patch
View File

@ -8,7 +8,7 @@
#include <asm/checksum.h>
@@ -569,7 +570,8 @@ static int
@@ -571,7 +572,8 @@ static int
ltq_etop_mdio_init(struct net_device *dev)
{
struct ltq_etop_priv *priv = netdev_priv(dev);
@ -18,7 +18,7 @@
priv->mii_bus = mdiobus_alloc();
if (!priv->mii_bus) {
@@ -589,7 +591,15 @@ ltq_etop_mdio_init(struct net_device *de
@@ -591,7 +593,15 @@ ltq_etop_mdio_init(struct net_device *de
priv->mii_bus->name = "ltq_mii";
snprintf(priv->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x",
priv->pdev->name, priv->pdev->id);