aboutsummaryrefslogtreecommitdiffstats
path: root/target/linux
diff options
context:
space:
mode:
Diffstat (limited to 'target/linux')
-rw-r--r--target/linux/brcm47xx/patches-3.10/712-bgmac_implement_unaligned_addressing.patch140
-rw-r--r--target/linux/brcm47xx/patches-3.10/770-bgmac-phylib.patch12
2 files changed, 146 insertions, 6 deletions
diff --git a/target/linux/brcm47xx/patches-3.10/712-bgmac_implement_unaligned_addressing.patch b/target/linux/brcm47xx/patches-3.10/712-bgmac_implement_unaligned_addressing.patch
new file mode 100644
index 0000000000..939ae114bb
--- /dev/null
+++ b/target/linux/brcm47xx/patches-3.10/712-bgmac_implement_unaligned_addressing.patch
@@ -0,0 +1,140 @@
+bgmac: implement unaligned addressing for DMA rings that support it
+
+This is important patch for new devices that support unaligned
+addressing. That devices suffer from the backward-compatibility bug in
+DMA engine. In theory we should be able to use old mechanism, but in
+practice DMA address seems to be randomly copied into status register
+when hardware reaches end of a ring. This breaks reading slot number
+from status register and we can't use DMA anymore.
+
+Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
+
+--- a/drivers/net/ethernet/broadcom/bgmac.c
++++ b/drivers/net/ethernet/broadcom/bgmac.c
+@@ -157,6 +157,7 @@ static netdev_tx_t bgmac_dma_tx_add(stru
+ if (++ring->end >= BGMAC_TX_RING_SLOTS)
+ ring->end = 0;
+ bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_TX_INDEX,
++ ring->index_base +
+ ring->end * sizeof(struct bgmac_dma_desc));
+
+ /* Always keep one slot free to allow detecting bugged calls. */
+@@ -181,6 +182,8 @@ static void bgmac_dma_tx_free(struct bgm
+ /* The last slot that hardware didn't consume yet */
+ empty_slot = bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_TX_STATUS);
+ empty_slot &= BGMAC_DMA_TX_STATDPTR;
++ empty_slot -= ring->index_base;
++ empty_slot &= BGMAC_DMA_TX_STATDPTR;
+ empty_slot /= sizeof(struct bgmac_dma_desc);
+
+ while (ring->start != empty_slot) {
+@@ -274,6 +277,8 @@ static int bgmac_dma_rx_read(struct bgma
+
+ end_slot = bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_RX_STATUS);
+ end_slot &= BGMAC_DMA_RX_STATDPTR;
++ end_slot -= ring->index_base;
++ end_slot &= BGMAC_DMA_RX_STATDPTR;
+ end_slot /= sizeof(struct bgmac_dma_desc);
+
+ ring->end = end_slot;
+@@ -418,9 +423,6 @@ static int bgmac_dma_alloc(struct bgmac
+ ring = &bgmac->tx_ring[i];
+ ring->num_slots = BGMAC_TX_RING_SLOTS;
+ ring->mmio_base = ring_base[i];
+- if (bgmac_dma_unaligned(bgmac, ring, BGMAC_DMA_RING_TX))
+- bgmac_warn(bgmac, "TX on ring 0x%X supports unaligned addressing but this feature is not implemented\n",
+- ring->mmio_base);
+
+ /* Alloc ring of descriptors */
+ size = ring->num_slots * sizeof(struct bgmac_dma_desc);
+@@ -435,6 +437,13 @@ static int bgmac_dma_alloc(struct bgmac
+ if (ring->dma_base & 0xC0000000)
+ bgmac_warn(bgmac, "DMA address using 0xC0000000 bit(s), it may need translation trick\n");
+
++ ring->unaligned = bgmac_dma_unaligned(bgmac, ring,
++ BGMAC_DMA_RING_TX);
++ if (ring->unaligned)
++ ring->index_base = lower_32_bits(ring->dma_base);
++ else
++ ring->index_base = 0;
++
+ /* No need to alloc TX slots yet */
+ }
+
+@@ -444,9 +453,6 @@ static int bgmac_dma_alloc(struct bgmac
+ ring = &bgmac->rx_ring[i];
+ ring->num_slots = BGMAC_RX_RING_SLOTS;
+ ring->mmio_base = ring_base[i];
+- if (bgmac_dma_unaligned(bgmac, ring, BGMAC_DMA_RING_RX))
+- bgmac_warn(bgmac, "RX on ring 0x%X supports unaligned addressing but this feature is not implemented\n",
+- ring->mmio_base);
+
+ /* Alloc ring of descriptors */
+ size = ring->num_slots * sizeof(struct bgmac_dma_desc);
+@@ -462,6 +468,13 @@ static int bgmac_dma_alloc(struct bgmac
+ if (ring->dma_base & 0xC0000000)
+ bgmac_warn(bgmac, "DMA address using 0xC0000000 bit(s), it may need translation trick\n");
+
++ ring->unaligned = bgmac_dma_unaligned(bgmac, ring,
++ BGMAC_DMA_RING_RX);
++ if (ring->unaligned)
++ ring->index_base = lower_32_bits(ring->dma_base);
++ else
++ ring->index_base = 0;
++
+ /* Alloc RX slots */
+ for (j = 0; j < ring->num_slots; j++) {
+ err = bgmac_dma_rx_skb_for_slot(bgmac, &ring->slots[j]);
+@@ -489,12 +502,14 @@ static void bgmac_dma_init(struct bgmac
+ for (i = 0; i < BGMAC_MAX_TX_RINGS; i++) {
+ ring = &bgmac->tx_ring[i];
+
+- /* We don't implement unaligned addressing, so enable first */
+- bgmac_dma_tx_enable(bgmac, ring);
++ if (!ring->unaligned)
++ bgmac_dma_tx_enable(bgmac, ring);
+ bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_TX_RINGLO,
+ lower_32_bits(ring->dma_base));
+ bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_TX_RINGHI,
+ upper_32_bits(ring->dma_base));
++ if (ring->unaligned)
++ bgmac_dma_tx_enable(bgmac, ring);
+
+ ring->start = 0;
+ ring->end = 0; /* Points the slot that should *not* be read */
+@@ -505,12 +520,14 @@ static void bgmac_dma_init(struct bgmac
+
+ ring = &bgmac->rx_ring[i];
+
+- /* We don't implement unaligned addressing, so enable first */
+- bgmac_dma_rx_enable(bgmac, ring);
++ if (!ring->unaligned)
++ bgmac_dma_rx_enable(bgmac, ring);
+ bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_RX_RINGLO,
+ lower_32_bits(ring->dma_base));
+ bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_RX_RINGHI,
+ upper_32_bits(ring->dma_base));
++ if (ring->unaligned)
++ bgmac_dma_rx_enable(bgmac, ring);
+
+ for (j = 0, dma_desc = ring->cpu_base; j < ring->num_slots;
+ j++, dma_desc++) {
+@@ -531,6 +548,7 @@ static void bgmac_dma_init(struct bgmac
+ }
+
+ bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_RX_INDEX,
++ ring->index_base +
+ ring->num_slots * sizeof(struct bgmac_dma_desc));
+
+ ring->start = 0;
+--- a/drivers/net/ethernet/broadcom/bgmac.h
++++ b/drivers/net/ethernet/broadcom/bgmac.h
+@@ -384,6 +384,8 @@ struct bgmac_dma_ring {
+ u16 mmio_base;
+ struct bgmac_dma_desc *cpu_base;
+ dma_addr_t dma_base;
++ u32 index_base; /* Used for unaligned rings only, otherwise 0 */
++ bool unaligned;
+
+ struct bgmac_slot_info slots[BGMAC_RX_RING_SLOTS];
+ };
diff --git a/target/linux/brcm47xx/patches-3.10/770-bgmac-phylib.patch b/target/linux/brcm47xx/patches-3.10/770-bgmac-phylib.patch
index 6041d2a77a..33308319db 100644
--- a/target/linux/brcm47xx/patches-3.10/770-bgmac-phylib.patch
+++ b/target/linux/brcm47xx/patches-3.10/770-bgmac-phylib.patch
@@ -10,7 +10,7 @@
They can be found on BCM47xx SoCs and provide gigabit ethernet.
--- a/drivers/net/ethernet/broadcom/bgmac.c
+++ b/drivers/net/ethernet/broadcom/bgmac.c
-@@ -1201,27 +1201,14 @@ static int bgmac_set_mac_address(struct
+@@ -1219,27 +1219,14 @@ static int bgmac_set_mac_address(struct
static int bgmac_ioctl(struct net_device *net_dev, struct ifreq *ifr, int cmd)
{
struct bgmac *bgmac = netdev_priv(net_dev);
@@ -45,7 +45,7 @@
}
static const struct net_device_ops bgmac_netdev_ops = {
-@@ -1243,61 +1230,18 @@ static int bgmac_get_settings(struct net
+@@ -1261,61 +1248,18 @@ static int bgmac_get_settings(struct net
{
struct bgmac *bgmac = netdev_priv(net_dev);
@@ -111,7 +111,7 @@
static void bgmac_get_drvinfo(struct net_device *net_dev,
struct ethtool_drvinfo *info)
-@@ -1308,6 +1252,7 @@ static void bgmac_get_drvinfo(struct net
+@@ -1326,6 +1270,7 @@ static void bgmac_get_drvinfo(struct net
static const struct ethtool_ops bgmac_ethtool_ops = {
.get_settings = bgmac_get_settings,
@@ -119,7 +119,7 @@
.get_drvinfo = bgmac_get_drvinfo,
};
-@@ -1326,10 +1271,42 @@ static int bgmac_mii_write(struct mii_bu
+@@ -1344,10 +1289,42 @@ static int bgmac_mii_write(struct mii_bu
return bgmac_phy_write(bus->priv, mii_id, regnum, value);
}
@@ -162,7 +162,7 @@
mii_bus = mdiobus_alloc();
if (!mii_bus)
-@@ -1360,7 +1337,29 @@ static int bgmac_mii_register(struct bgm
+@@ -1378,7 +1355,29 @@ static int bgmac_mii_register(struct bgm
bgmac->mii_bus = mii_bus;
@@ -195,7 +195,7 @@
kfree(mii_bus->irq);
--- a/drivers/net/ethernet/broadcom/bgmac.h
+++ b/drivers/net/ethernet/broadcom/bgmac.h
-@@ -399,7 +399,10 @@ struct bgmac {
+@@ -401,7 +401,10 @@ struct bgmac {
struct bcma_device *cmn; /* Reference to CMN core for BCM4706 */
struct net_device *net_dev;
struct napi_struct napi;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-07 13:44:32 +0000