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tegrakernel/kernel/kernel-4.9/drivers/net/ethernet/broadcom/bgmac.c

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initial commit tegra kernel 32.6.1
2022-02-16 09:13:02 -06:00
/*
* Driver for (BCM4706)? GBit MAC core on BCMA bus.
*
* Copyright (C) 2012 Rafał Miłecki <zajec5@gmail.com>
*
* Licensed under the GNU/GPL. See COPYING for details.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/bcma/bcma.h>
#include <linux/etherdevice.h>
#include <linux/bcm47xx_nvram.h>
#include "bgmac.h"
static bool bgmac_wait_value(struct bgmac *bgmac, u16 reg, u32 mask,
u32 value, int timeout)
{
u32 val;
int i;
for (i = 0; i < timeout / 10; i++) {
val = bgmac_read(bgmac, reg);
if ((val & mask) == value)
return true;
udelay(10);
}
dev_err(bgmac->dev, "Timeout waiting for reg 0x%X\n", reg);
return false;
}
/**************************************************
* DMA
**************************************************/
static void bgmac_dma_tx_reset(struct bgmac *bgmac, struct bgmac_dma_ring *ring)
{
u32 val;
int i;
if (!ring->mmio_base)
return;
/* Suspend DMA TX ring first.
* bgmac_wait_value doesn't support waiting for any of few values, so
* implement whole loop here.
*/
bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_TX_CTL,
BGMAC_DMA_TX_SUSPEND);
for (i = 0; i < 10000 / 10; i++) {
val = bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_TX_STATUS);
val &= BGMAC_DMA_TX_STAT;
if (val == BGMAC_DMA_TX_STAT_DISABLED ||
val == BGMAC_DMA_TX_STAT_IDLEWAIT ||
val == BGMAC_DMA_TX_STAT_STOPPED) {
i = 0;
break;
}
udelay(10);
}
if (i)
dev_err(bgmac->dev, "Timeout suspending DMA TX ring 0x%X (BGMAC_DMA_TX_STAT: 0x%08X)\n",
ring->mmio_base, val);
/* Remove SUSPEND bit */
bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_TX_CTL, 0);
if (!bgmac_wait_value(bgmac,
ring->mmio_base + BGMAC_DMA_TX_STATUS,
BGMAC_DMA_TX_STAT, BGMAC_DMA_TX_STAT_DISABLED,
10000)) {
dev_warn(bgmac->dev, "DMA TX ring 0x%X wasn't disabled on time, waiting additional 300us\n",
ring->mmio_base);
udelay(300);
val = bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_TX_STATUS);
if ((val & BGMAC_DMA_TX_STAT) != BGMAC_DMA_TX_STAT_DISABLED)
dev_err(bgmac->dev, "Reset of DMA TX ring 0x%X failed\n",
ring->mmio_base);
}
}
static void bgmac_dma_tx_enable(struct bgmac *bgmac,
struct bgmac_dma_ring *ring)
{
u32 ctl;
ctl = bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_TX_CTL);
if (bgmac->feature_flags & BGMAC_FEAT_TX_MASK_SETUP) {
ctl &= ~BGMAC_DMA_TX_BL_MASK;
ctl |= BGMAC_DMA_TX_BL_128 << BGMAC_DMA_TX_BL_SHIFT;
ctl &= ~BGMAC_DMA_TX_MR_MASK;
ctl |= BGMAC_DMA_TX_MR_2 << BGMAC_DMA_TX_MR_SHIFT;
ctl &= ~BGMAC_DMA_TX_PC_MASK;
ctl |= BGMAC_DMA_TX_PC_16 << BGMAC_DMA_TX_PC_SHIFT;
ctl &= ~BGMAC_DMA_TX_PT_MASK;
ctl |= BGMAC_DMA_TX_PT_8 << BGMAC_DMA_TX_PT_SHIFT;
}
ctl |= BGMAC_DMA_TX_ENABLE;
ctl |= BGMAC_DMA_TX_PARITY_DISABLE;
bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_TX_CTL, ctl);
}
static void
bgmac_dma_tx_add_buf(struct bgmac *bgmac, struct bgmac_dma_ring *ring,
int i, int len, u32 ctl0)
{
struct bgmac_slot_info *slot;
struct bgmac_dma_desc *dma_desc;
u32 ctl1;
if (i == BGMAC_TX_RING_SLOTS - 1)
ctl0 |= BGMAC_DESC_CTL0_EOT;
ctl1 = len & BGMAC_DESC_CTL1_LEN;
slot = &ring->slots[i];
dma_desc = &ring->cpu_base[i];
dma_desc->addr_low = cpu_to_le32(lower_32_bits(slot->dma_addr));
dma_desc->addr_high = cpu_to_le32(upper_32_bits(slot->dma_addr));
dma_desc->ctl0 = cpu_to_le32(ctl0);
dma_desc->ctl1 = cpu_to_le32(ctl1);
}
static netdev_tx_t bgmac_dma_tx_add(struct bgmac *bgmac,
struct bgmac_dma_ring *ring,
struct sk_buff *skb)
{
struct device *dma_dev = bgmac->dma_dev;
struct net_device *net_dev = bgmac->net_dev;
int index = ring->end % BGMAC_TX_RING_SLOTS;
struct bgmac_slot_info *slot = &ring->slots[index];
int nr_frags;
u32 flags;
int i;
if (skb->len > BGMAC_DESC_CTL1_LEN) {
netdev_err(bgmac->net_dev, "Too long skb (%d)\n", skb->len);
goto err_drop;
}
if (skb->ip_summed == CHECKSUM_PARTIAL)
skb_checksum_help(skb);
nr_frags = skb_shinfo(skb)->nr_frags;
/* ring->end - ring->start will return the number of valid slots,
* even when ring->end overflows
*/
if (ring->end - ring->start + nr_frags + 1 >= BGMAC_TX_RING_SLOTS) {
netdev_err(bgmac->net_dev, "TX ring is full, queue should be stopped!\n");
netif_stop_queue(net_dev);
return NETDEV_TX_BUSY;
}
slot->dma_addr = dma_map_single(dma_dev, skb->data, skb_headlen(skb),
DMA_TO_DEVICE);
if (unlikely(dma_mapping_error(dma_dev, slot->dma_addr)))
goto err_dma_head;
flags = BGMAC_DESC_CTL0_SOF;
if (!nr_frags)
flags |= BGMAC_DESC_CTL0_EOF | BGMAC_DESC_CTL0_IOC;
bgmac_dma_tx_add_buf(bgmac, ring, index, skb_headlen(skb), flags);
flags = 0;
for (i = 0; i < nr_frags; i++) {
struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i];
int len = skb_frag_size(frag);
index = (index + 1) % BGMAC_TX_RING_SLOTS;
slot = &ring->slots[index];
slot->dma_addr = skb_frag_dma_map(dma_dev, frag, 0,
len, DMA_TO_DEVICE);
if (unlikely(dma_mapping_error(dma_dev, slot->dma_addr)))
goto err_dma;
if (i == nr_frags - 1)
flags |= BGMAC_DESC_CTL0_EOF | BGMAC_DESC_CTL0_IOC;
bgmac_dma_tx_add_buf(bgmac, ring, index, len, flags);
}
slot->skb = skb;
ring->end += nr_frags + 1;
netdev_sent_queue(net_dev, skb->len);
wmb();
/* Increase ring->end to point empty slot. We tell hardware the first
* slot it should *not* read.
*/
bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_TX_INDEX,
ring->index_base +
(ring->end % BGMAC_TX_RING_SLOTS) *
sizeof(struct bgmac_dma_desc));
if (ring->end - ring->start >= BGMAC_TX_RING_SLOTS - 8)
netif_stop_queue(net_dev);
return NETDEV_TX_OK;
err_dma:
dma_unmap_single(dma_dev, slot->dma_addr, skb_headlen(skb),
DMA_TO_DEVICE);
while (i-- > 0) {
int index = (ring->end + i) % BGMAC_TX_RING_SLOTS;
struct bgmac_slot_info *slot = &ring->slots[index];
u32 ctl1 = le32_to_cpu(ring->cpu_base[index].ctl1);
int len = ctl1 & BGMAC_DESC_CTL1_LEN;
dma_unmap_page(dma_dev, slot->dma_addr, len, DMA_TO_DEVICE);
}
err_dma_head:
netdev_err(bgmac->net_dev, "Mapping error of skb on ring 0x%X\n",
ring->mmio_base);
err_drop:
dev_kfree_skb(skb);
net_dev->stats.tx_dropped++;
net_dev->stats.tx_errors++;
return NETDEV_TX_OK;
}
/* Free transmitted packets */
static void bgmac_dma_tx_free(struct bgmac *bgmac, struct bgmac_dma_ring *ring)
{
struct device *dma_dev = bgmac->dma_dev;
int empty_slot;
bool freed = false;
unsigned bytes_compl = 0, pkts_compl = 0;
/* 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 != ring->end) {
int slot_idx = ring->start % BGMAC_TX_RING_SLOTS;
struct bgmac_slot_info *slot = &ring->slots[slot_idx];
u32 ctl0, ctl1;
int len;
if (slot_idx == empty_slot)
break;
ctl0 = le32_to_cpu(ring->cpu_base[slot_idx].ctl0);
ctl1 = le32_to_cpu(ring->cpu_base[slot_idx].ctl1);
len = ctl1 & BGMAC_DESC_CTL1_LEN;
if (ctl0 & BGMAC_DESC_CTL0_SOF)
/* Unmap no longer used buffer */
dma_unmap_single(dma_dev, slot->dma_addr, len,
DMA_TO_DEVICE);
else
dma_unmap_page(dma_dev, slot->dma_addr, len,
DMA_TO_DEVICE);
if (slot->skb) {
bgmac->net_dev->stats.tx_bytes += slot->skb->len;
bgmac->net_dev->stats.tx_packets++;
bytes_compl += slot->skb->len;
pkts_compl++;
/* Free memory! :) */
dev_kfree_skb(slot->skb);
slot->skb = NULL;
}
slot->dma_addr = 0;
ring->start++;
freed = true;
}
if (!pkts_compl)
return;
netdev_completed_queue(bgmac->net_dev, pkts_compl, bytes_compl);
if (netif_queue_stopped(bgmac->net_dev))
netif_wake_queue(bgmac->net_dev);
}
static void bgmac_dma_rx_reset(struct bgmac *bgmac, struct bgmac_dma_ring *ring)
{
if (!ring->mmio_base)
return;
bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_RX_CTL, 0);
if (!bgmac_wait_value(bgmac,
ring->mmio_base + BGMAC_DMA_RX_STATUS,
BGMAC_DMA_RX_STAT, BGMAC_DMA_RX_STAT_DISABLED,
10000))
dev_err(bgmac->dev, "Reset of ring 0x%X RX failed\n",
ring->mmio_base);
}
static void bgmac_dma_rx_enable(struct bgmac *bgmac,
struct bgmac_dma_ring *ring)
{
u32 ctl;
ctl = bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_RX_CTL);
/* preserve ONLY bits 16-17 from current hardware value */
ctl &= BGMAC_DMA_RX_ADDREXT_MASK;
if (bgmac->feature_flags & BGMAC_FEAT_RX_MASK_SETUP) {
ctl &= ~BGMAC_DMA_RX_BL_MASK;
ctl |= BGMAC_DMA_RX_BL_128 << BGMAC_DMA_RX_BL_SHIFT;
ctl &= ~BGMAC_DMA_RX_PC_MASK;
ctl |= BGMAC_DMA_RX_PC_8 << BGMAC_DMA_RX_PC_SHIFT;
ctl &= ~BGMAC_DMA_RX_PT_MASK;
ctl |= BGMAC_DMA_RX_PT_1 << BGMAC_DMA_RX_PT_SHIFT;
}
ctl |= BGMAC_DMA_RX_ENABLE;
ctl |= BGMAC_DMA_RX_PARITY_DISABLE;
ctl |= BGMAC_DMA_RX_OVERFLOW_CONT;
ctl |= BGMAC_RX_FRAME_OFFSET << BGMAC_DMA_RX_FRAME_OFFSET_SHIFT;
bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_RX_CTL, ctl);
}
static int bgmac_dma_rx_skb_for_slot(struct bgmac *bgmac,
struct bgmac_slot_info *slot)
{
struct device *dma_dev = bgmac->dma_dev;
dma_addr_t dma_addr;
struct bgmac_rx_header *rx;
void *buf;
/* Alloc skb */
buf = netdev_alloc_frag(BGMAC_RX_ALLOC_SIZE);
if (!buf)
return -ENOMEM;
/* Poison - if everything goes fine, hardware will overwrite it */
rx = buf + BGMAC_RX_BUF_OFFSET;
rx->len = cpu_to_le16(0xdead);
rx->flags = cpu_to_le16(0xbeef);
/* Map skb for the DMA */
dma_addr = dma_map_single(dma_dev, buf + BGMAC_RX_BUF_OFFSET,
BGMAC_RX_BUF_SIZE, DMA_FROM_DEVICE);
if (dma_mapping_error(dma_dev, dma_addr)) {
netdev_err(bgmac->net_dev, "DMA mapping error\n");
put_page(virt_to_head_page(buf));
return -ENOMEM;
}
/* Update the slot */
slot->buf = buf;
slot->dma_addr = dma_addr;
return 0;
}
static void bgmac_dma_rx_update_index(struct bgmac *bgmac,
struct bgmac_dma_ring *ring)
{
dma_wmb();
bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_RX_INDEX,
ring->index_base +
ring->end * sizeof(struct bgmac_dma_desc));
}
static void bgmac_dma_rx_setup_desc(struct bgmac *bgmac,
struct bgmac_dma_ring *ring, int desc_idx)
{
struct bgmac_dma_desc *dma_desc = ring->cpu_base + desc_idx;
u32 ctl0 = 0, ctl1 = 0;
if (desc_idx == BGMAC_RX_RING_SLOTS - 1)
ctl0 |= BGMAC_DESC_CTL0_EOT;
ctl1 |= BGMAC_RX_BUF_SIZE & BGMAC_DESC_CTL1_LEN;
/* Is there any BGMAC device that requires extension? */
/* ctl1 |= (addrext << B43_DMA64_DCTL1_ADDREXT_SHIFT) &
* B43_DMA64_DCTL1_ADDREXT_MASK;
*/
dma_desc->addr_low = cpu_to_le32(lower_32_bits(ring->slots[desc_idx].dma_addr));
dma_desc->addr_high = cpu_to_le32(upper_32_bits(ring->slots[desc_idx].dma_addr));
dma_desc->ctl0 = cpu_to_le32(ctl0);
dma_desc->ctl1 = cpu_to_le32(ctl1);
ring->end = desc_idx;
}
static void bgmac_dma_rx_poison_buf(struct device *dma_dev,
struct bgmac_slot_info *slot)
{
struct bgmac_rx_header *rx = slot->buf + BGMAC_RX_BUF_OFFSET;
dma_sync_single_for_cpu(dma_dev, slot->dma_addr, BGMAC_RX_BUF_SIZE,
DMA_FROM_DEVICE);
rx->len = cpu_to_le16(0xdead);
rx->flags = cpu_to_le16(0xbeef);
dma_sync_single_for_device(dma_dev, slot->dma_addr, BGMAC_RX_BUF_SIZE,
DMA_FROM_DEVICE);
}
static int bgmac_dma_rx_read(struct bgmac *bgmac, struct bgmac_dma_ring *ring,
int weight)
{
u32 end_slot;
int handled = 0;
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);
while (ring->start != end_slot) {
struct device *dma_dev = bgmac->dma_dev;
struct bgmac_slot_info *slot = &ring->slots[ring->start];
struct bgmac_rx_header *rx = slot->buf + BGMAC_RX_BUF_OFFSET;
struct sk_buff *skb;
void *buf = slot->buf;
dma_addr_t dma_addr = slot->dma_addr;
u16 len, flags;
do {
/* Prepare new skb as replacement */
if (bgmac_dma_rx_skb_for_slot(bgmac, slot)) {
bgmac_dma_rx_poison_buf(dma_dev, slot);
break;
}
/* Unmap buffer to make it accessible to the CPU */
dma_unmap_single(dma_dev, dma_addr,
BGMAC_RX_BUF_SIZE, DMA_FROM_DEVICE);
/* Get info from the header */
len = le16_to_cpu(rx->len);
flags = le16_to_cpu(rx->flags);
/* Check for poison and drop or pass the packet */
if (len == 0xdead && flags == 0xbeef) {
netdev_err(bgmac->net_dev, "Found poisoned packet at slot %d, DMA issue!\n",
ring->start);
put_page(virt_to_head_page(buf));
bgmac->net_dev->stats.rx_errors++;
break;
}
if (len > BGMAC_RX_ALLOC_SIZE) {
netdev_err(bgmac->net_dev, "Found oversized packet at slot %d, DMA issue!\n",
ring->start);
put_page(virt_to_head_page(buf));
bgmac->net_dev->stats.rx_length_errors++;
bgmac->net_dev->stats.rx_errors++;
break;
}
/* Omit CRC. */
len -= ETH_FCS_LEN;
skb = build_skb(buf, BGMAC_RX_ALLOC_SIZE);
if (unlikely(!skb)) {
netdev_err(bgmac->net_dev, "build_skb failed\n");
put_page(virt_to_head_page(buf));
bgmac->net_dev->stats.rx_errors++;
break;
}
skb_put(skb, BGMAC_RX_FRAME_OFFSET +
BGMAC_RX_BUF_OFFSET + len);
skb_pull(skb, BGMAC_RX_FRAME_OFFSET +
BGMAC_RX_BUF_OFFSET);
skb_checksum_none_assert(skb);
skb->protocol = eth_type_trans(skb, bgmac->net_dev);
bgmac->net_dev->stats.rx_bytes += len;
bgmac->net_dev->stats.rx_packets++;
napi_gro_receive(&bgmac->napi, skb);
handled++;
} while (0);
bgmac_dma_rx_setup_desc(bgmac, ring, ring->start);
if (++ring->start >= BGMAC_RX_RING_SLOTS)
ring->start = 0;
if (handled >= weight) /* Should never be greater */
break;
}
bgmac_dma_rx_update_index(bgmac, ring);
return handled;
}
/* Does ring support unaligned addressing? */
static bool bgmac_dma_unaligned(struct bgmac *bgmac,
struct bgmac_dma_ring *ring,
enum bgmac_dma_ring_type ring_type)
{
switch (ring_type) {
case BGMAC_DMA_RING_TX:
bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_TX_RINGLO,
0xff0);
if (bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_TX_RINGLO))
return true;
break;
case BGMAC_DMA_RING_RX:
bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_RX_RINGLO,
0xff0);
if (bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_RX_RINGLO))
return true;
break;
}
return false;
}
static void bgmac_dma_tx_ring_free(struct bgmac *bgmac,
struct bgmac_dma_ring *ring)
{
struct device *dma_dev = bgmac->dma_dev;
struct bgmac_dma_desc *dma_desc = ring->cpu_base;
struct bgmac_slot_info *slot;
int i;
for (i = 0; i < BGMAC_TX_RING_SLOTS; i++) {
u32 ctl1 = le32_to_cpu(dma_desc[i].ctl1);
unsigned int len = ctl1 & BGMAC_DESC_CTL1_LEN;
slot = &ring->slots[i];
dev_kfree_skb(slot->skb);
if (!slot->dma_addr)
continue;
if (slot->skb)
dma_unmap_single(dma_dev, slot->dma_addr,
len, DMA_TO_DEVICE);
else
dma_unmap_page(dma_dev, slot->dma_addr,
len, DMA_TO_DEVICE);
}
}
static void bgmac_dma_rx_ring_free(struct bgmac *bgmac,
struct bgmac_dma_ring *ring)
{
struct device *dma_dev = bgmac->dma_dev;
struct bgmac_slot_info *slot;
int i;
for (i = 0; i < BGMAC_RX_RING_SLOTS; i++) {
slot = &ring->slots[i];
if (!slot->dma_addr)
continue;
dma_unmap_single(dma_dev, slot->dma_addr,
BGMAC_RX_BUF_SIZE,
DMA_FROM_DEVICE);
put_page(virt_to_head_page(slot->buf));
slot->dma_addr = 0;
}
}
static void bgmac_dma_ring_desc_free(struct bgmac *bgmac,
struct bgmac_dma_ring *ring,
int num_slots)
{
struct device *dma_dev = bgmac->dma_dev;
int size;
if (!ring->cpu_base)
return;
/* Free ring of descriptors */
size = num_slots * sizeof(struct bgmac_dma_desc);
dma_free_coherent(dma_dev, size, ring->cpu_base,
ring->dma_base);
}
static void bgmac_dma_cleanup(struct bgmac *bgmac)
{
int i;
for (i = 0; i < BGMAC_MAX_TX_RINGS; i++)
bgmac_dma_tx_ring_free(bgmac, &bgmac->tx_ring[i]);
for (i = 0; i < BGMAC_MAX_RX_RINGS; i++)
bgmac_dma_rx_ring_free(bgmac, &bgmac->rx_ring[i]);
}
static void bgmac_dma_free(struct bgmac *bgmac)
{
int i;
for (i = 0; i < BGMAC_MAX_TX_RINGS; i++)
bgmac_dma_ring_desc_free(bgmac, &bgmac->tx_ring[i],
BGMAC_TX_RING_SLOTS);
for (i = 0; i < BGMAC_MAX_RX_RINGS; i++)
bgmac_dma_ring_desc_free(bgmac, &bgmac->rx_ring[i],
BGMAC_RX_RING_SLOTS);
}
static int bgmac_dma_alloc(struct bgmac *bgmac)
{
struct device *dma_dev = bgmac->dma_dev;
struct bgmac_dma_ring *ring;
static const u16 ring_base[] = { BGMAC_DMA_BASE0, BGMAC_DMA_BASE1,
BGMAC_DMA_BASE2, BGMAC_DMA_BASE3, };
int size; /* ring size: different for Tx and Rx */
int err;
int i;
BUILD_BUG_ON(BGMAC_MAX_TX_RINGS > ARRAY_SIZE(ring_base));
BUILD_BUG_ON(BGMAC_MAX_RX_RINGS > ARRAY_SIZE(ring_base));
if (!(bgmac_idm_read(bgmac, BCMA_IOST) & BCMA_IOST_DMA64)) {
dev_err(bgmac->dev, "Core does not report 64-bit DMA\n");
return -ENOTSUPP;
}
for (i = 0; i < BGMAC_MAX_TX_RINGS; i++) {
ring = &bgmac->tx_ring[i];
ring->mmio_base = ring_base[i];
/* Alloc ring of descriptors */
size = BGMAC_TX_RING_SLOTS * sizeof(struct bgmac_dma_desc);
ring->cpu_base = dma_zalloc_coherent(dma_dev, size,
&ring->dma_base,
GFP_KERNEL);
if (!ring->cpu_base) {
dev_err(bgmac->dev, "Allocation of TX ring 0x%X failed\n",
ring->mmio_base);
goto err_dma_free;
}
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 */
}
for (i = 0; i < BGMAC_MAX_RX_RINGS; i++) {
ring = &bgmac->rx_ring[i];
ring->mmio_base = ring_base[i];
/* Alloc ring of descriptors */
size = BGMAC_RX_RING_SLOTS * sizeof(struct bgmac_dma_desc);
ring->cpu_base = dma_zalloc_coherent(dma_dev, size,
&ring->dma_base,
GFP_KERNEL);
if (!ring->cpu_base) {
dev_err(bgmac->dev, "Allocation of RX ring 0x%X failed\n",
ring->mmio_base);
err = -ENOMEM;
goto err_dma_free;
}
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;
}
return 0;
err_dma_free:
bgmac_dma_free(bgmac);
return -ENOMEM;
}
static int bgmac_dma_init(struct bgmac *bgmac)
{
struct bgmac_dma_ring *ring;
int i, err;
for (i = 0; i < BGMAC_MAX_TX_RINGS; i++) {
ring = &bgmac->tx_ring[i];
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 */
}
for (i = 0; i < BGMAC_MAX_RX_RINGS; i++) {
int j;
ring = &bgmac->rx_ring[i];
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);
ring->start = 0;
ring->end = 0;
for (j = 0; j < BGMAC_RX_RING_SLOTS; j++) {
err = bgmac_dma_rx_skb_for_slot(bgmac, &ring->slots[j]);
if (err)
goto error;
bgmac_dma_rx_setup_desc(bgmac, ring, j);
}
bgmac_dma_rx_update_index(bgmac, ring);
}
return 0;
error:
bgmac_dma_cleanup(bgmac);
return err;
}
/**************************************************
* Chip ops
**************************************************/
/* TODO: can we just drop @force? Can we don't reset MAC at all if there is
* nothing to change? Try if after stabilizng driver.
*/
static void bgmac_cmdcfg_maskset(struct bgmac *bgmac, u32 mask, u32 set,
bool force)
{
u32 cmdcfg = bgmac_read(bgmac, BGMAC_CMDCFG);
u32 new_val = (cmdcfg & mask) | set;
u32 cmdcfg_sr;
if (bgmac->feature_flags & BGMAC_FEAT_CMDCFG_SR_REV4)
cmdcfg_sr = BGMAC_CMDCFG_SR_REV4;
else
cmdcfg_sr = BGMAC_CMDCFG_SR_REV0;
bgmac_set(bgmac, BGMAC_CMDCFG, cmdcfg_sr);
udelay(2);
if (new_val != cmdcfg || force)
bgmac_write(bgmac, BGMAC_CMDCFG, new_val);
bgmac_mask(bgmac, BGMAC_CMDCFG, ~cmdcfg_sr);
udelay(2);
}
static void bgmac_write_mac_address(struct bgmac *bgmac, u8 *addr)
{
u32 tmp;
tmp = (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) | addr[3];
bgmac_write(bgmac, BGMAC_MACADDR_HIGH, tmp);
tmp = (addr[4] << 8) | addr[5];
bgmac_write(bgmac, BGMAC_MACADDR_LOW, tmp);
}
static void bgmac_set_rx_mode(struct net_device *net_dev)
{
struct bgmac *bgmac = netdev_priv(net_dev);
if (net_dev->flags & IFF_PROMISC)
bgmac_cmdcfg_maskset(bgmac, ~0, BGMAC_CMDCFG_PROM, true);
else
bgmac_cmdcfg_maskset(bgmac, ~BGMAC_CMDCFG_PROM, 0, true);
}
#if 0 /* We don't use that regs yet */
static void bgmac_chip_stats_update(struct bgmac *bgmac)
{
int i;
if (!(bgmac->feature_flags & BGMAC_FEAT_NO_CLR_MIB)) {
for (i = 0; i < BGMAC_NUM_MIB_TX_REGS; i++)
bgmac->mib_tx_regs[i] =
bgmac_read(bgmac,
BGMAC_TX_GOOD_OCTETS + (i * 4));
for (i = 0; i < BGMAC_NUM_MIB_RX_REGS; i++)
bgmac->mib_rx_regs[i] =
bgmac_read(bgmac,
BGMAC_RX_GOOD_OCTETS + (i * 4));
}
/* TODO: what else? how to handle BCM4706? Specs are needed */
}
#endif
static void bgmac_clear_mib(struct bgmac *bgmac)
{
int i;
if (bgmac->feature_flags & BGMAC_FEAT_NO_CLR_MIB)
return;
bgmac_set(bgmac, BGMAC_DEV_CTL, BGMAC_DC_MROR);
for (i = 0; i < BGMAC_NUM_MIB_TX_REGS; i++)
bgmac_read(bgmac, BGMAC_TX_GOOD_OCTETS + (i * 4));
for (i = 0; i < BGMAC_NUM_MIB_RX_REGS; i++)
bgmac_read(bgmac, BGMAC_RX_GOOD_OCTETS + (i * 4));
}
/* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/gmac_speed */
static void bgmac_mac_speed(struct bgmac *bgmac)
{
u32 mask = ~(BGMAC_CMDCFG_ES_MASK | BGMAC_CMDCFG_HD);
u32 set = 0;
switch (bgmac->mac_speed) {
case SPEED_10:
set |= BGMAC_CMDCFG_ES_10;
break;
case SPEED_100:
set |= BGMAC_CMDCFG_ES_100;
break;
case SPEED_1000:
set |= BGMAC_CMDCFG_ES_1000;
break;
case SPEED_2500:
set |= BGMAC_CMDCFG_ES_2500;
break;
default:
dev_err(bgmac->dev, "Unsupported speed: %d\n",
bgmac->mac_speed);
}
if (bgmac->mac_duplex == DUPLEX_HALF)
set |= BGMAC_CMDCFG_HD;
bgmac_cmdcfg_maskset(bgmac, mask, set, true);
}
static void bgmac_miiconfig(struct bgmac *bgmac)
{
if (bgmac->feature_flags & BGMAC_FEAT_FORCE_SPEED_2500) {
bgmac_idm_write(bgmac, BCMA_IOCTL,
bgmac_idm_read(bgmac, BCMA_IOCTL) | 0x40 |
BGMAC_BCMA_IOCTL_SW_CLKEN);
bgmac->mac_speed = SPEED_2500;
bgmac->mac_duplex = DUPLEX_FULL;
bgmac_mac_speed(bgmac);
} else {
u8 imode;
imode = (bgmac_read(bgmac, BGMAC_DEV_STATUS) &
BGMAC_DS_MM_MASK) >> BGMAC_DS_MM_SHIFT;
if (imode == 0 || imode == 1) {
bgmac->mac_speed = SPEED_100;
bgmac->mac_duplex = DUPLEX_FULL;
bgmac_mac_speed(bgmac);
}
}
}
/* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipreset */
static void bgmac_chip_reset(struct bgmac *bgmac)
{
u32 cmdcfg_sr;
u32 iost;
int i;
if (bgmac_clk_enabled(bgmac)) {
if (!bgmac->stats_grabbed) {
/* bgmac_chip_stats_update(bgmac); */
bgmac->stats_grabbed = true;
}
for (i = 0; i < BGMAC_MAX_TX_RINGS; i++)
bgmac_dma_tx_reset(bgmac, &bgmac->tx_ring[i]);
bgmac_cmdcfg_maskset(bgmac, ~0, BGMAC_CMDCFG_ML, false);
udelay(1);
for (i = 0; i < BGMAC_MAX_RX_RINGS; i++)
bgmac_dma_rx_reset(bgmac, &bgmac->rx_ring[i]);
/* TODO: Clear software multicast filter list */
}
iost = bgmac_idm_read(bgmac, BCMA_IOST);
if (bgmac->feature_flags & BGMAC_FEAT_IOST_ATTACHED)
iost &= ~BGMAC_BCMA_IOST_ATTACHED;
/* 3GMAC: for BCM4707 & BCM47094, only do core reset at bgmac_probe() */
if (!(bgmac->feature_flags & BGMAC_FEAT_NO_RESET)) {
u32 flags = 0;
if (iost & BGMAC_BCMA_IOST_ATTACHED) {
flags = BGMAC_BCMA_IOCTL_SW_CLKEN;
if (!bgmac->has_robosw)
flags |= BGMAC_BCMA_IOCTL_SW_RESET;
}
bgmac_clk_enable(bgmac, flags);
}
/* Request Misc PLL for corerev > 2 */
if (bgmac->feature_flags & BGMAC_FEAT_MISC_PLL_REQ) {
bgmac_set(bgmac, BCMA_CLKCTLST,
BGMAC_BCMA_CLKCTLST_MISC_PLL_REQ);
bgmac_wait_value(bgmac, BCMA_CLKCTLST,
BGMAC_BCMA_CLKCTLST_MISC_PLL_ST,
BGMAC_BCMA_CLKCTLST_MISC_PLL_ST,
1000);
}
if (bgmac->feature_flags & BGMAC_FEAT_SW_TYPE_PHY) {
u8 et_swtype = 0;
u8 sw_type = BGMAC_CHIPCTL_1_SW_TYPE_EPHY |
BGMAC_CHIPCTL_1_IF_TYPE_MII;
char buf[4];
if (bcm47xx_nvram_getenv("et_swtype", buf, sizeof(buf)) > 0) {
if (kstrtou8(buf, 0, &et_swtype))
dev_err(bgmac->dev, "Failed to parse et_swtype (%s)\n",
buf);
et_swtype &= 0x0f;
et_swtype <<= 4;
sw_type = et_swtype;
} else if (bgmac->feature_flags & BGMAC_FEAT_SW_TYPE_EPHYRMII) {
sw_type = BGMAC_CHIPCTL_1_IF_TYPE_RMII |
BGMAC_CHIPCTL_1_SW_TYPE_EPHYRMII;
} else if (bgmac->feature_flags & BGMAC_FEAT_SW_TYPE_RGMII) {
sw_type = BGMAC_CHIPCTL_1_IF_TYPE_RGMII |
BGMAC_CHIPCTL_1_SW_TYPE_RGMII;
}
bgmac_cco_ctl_maskset(bgmac, 1, ~(BGMAC_CHIPCTL_1_IF_TYPE_MASK |
BGMAC_CHIPCTL_1_SW_TYPE_MASK),
sw_type);
} else if (bgmac->feature_flags & BGMAC_FEAT_CC4_IF_SW_TYPE) {
u32 sw_type = BGMAC_CHIPCTL_4_IF_TYPE_MII |
BGMAC_CHIPCTL_4_SW_TYPE_EPHY;
u8 et_swtype = 0;
char buf[4];
if (bcm47xx_nvram_getenv("et_swtype", buf, sizeof(buf)) > 0) {
if (kstrtou8(buf, 0, &et_swtype))
dev_err(bgmac->dev, "Failed to parse et_swtype (%s)\n",
buf);
sw_type = (et_swtype & 0x0f) << 12;
} else if (bgmac->feature_flags & BGMAC_FEAT_CC4_IF_SW_TYPE_RGMII) {
sw_type = BGMAC_CHIPCTL_4_IF_TYPE_RGMII |
BGMAC_CHIPCTL_4_SW_TYPE_RGMII;
}
bgmac_cco_ctl_maskset(bgmac, 4, ~(BGMAC_CHIPCTL_4_IF_TYPE_MASK |
BGMAC_CHIPCTL_4_SW_TYPE_MASK),
sw_type);
} else if (bgmac->feature_flags & BGMAC_FEAT_CC7_IF_TYPE_RGMII) {
bgmac_cco_ctl_maskset(bgmac, 7, ~BGMAC_CHIPCTL_7_IF_TYPE_MASK,
BGMAC_CHIPCTL_7_IF_TYPE_RGMII);
}
if (iost & BGMAC_BCMA_IOST_ATTACHED && !bgmac->has_robosw)
bgmac_idm_write(bgmac, BCMA_IOCTL,
bgmac_idm_read(bgmac, BCMA_IOCTL) &
~BGMAC_BCMA_IOCTL_SW_RESET);
/* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/gmac_reset
* Specs don't say about using BGMAC_CMDCFG_SR, but in this routine
* BGMAC_CMDCFG is read _after_ putting chip in a reset. So it has to
* be keps until taking MAC out of the reset.
*/
if (bgmac->feature_flags & BGMAC_FEAT_CMDCFG_SR_REV4)
cmdcfg_sr = BGMAC_CMDCFG_SR_REV4;
else
cmdcfg_sr = BGMAC_CMDCFG_SR_REV0;
bgmac_cmdcfg_maskset(bgmac,
~(BGMAC_CMDCFG_TE |
BGMAC_CMDCFG_RE |
BGMAC_CMDCFG_RPI |
BGMAC_CMDCFG_TAI |
BGMAC_CMDCFG_HD |
BGMAC_CMDCFG_ML |
BGMAC_CMDCFG_CFE |
BGMAC_CMDCFG_RL |
BGMAC_CMDCFG_RED |
BGMAC_CMDCFG_PE |
BGMAC_CMDCFG_TPI |
BGMAC_CMDCFG_PAD_EN |
BGMAC_CMDCFG_PF),
BGMAC_CMDCFG_PROM |
BGMAC_CMDCFG_NLC |
BGMAC_CMDCFG_CFE |
cmdcfg_sr,
false);
bgmac->mac_speed = SPEED_UNKNOWN;
bgmac->mac_duplex = DUPLEX_UNKNOWN;
bgmac_clear_mib(bgmac);
if (bgmac->feature_flags & BGMAC_FEAT_CMN_PHY_CTL)
bgmac_cmn_maskset32(bgmac, BCMA_GMAC_CMN_PHY_CTL, ~0,
BCMA_GMAC_CMN_PC_MTE);
else
bgmac_set(bgmac, BGMAC_PHY_CNTL, BGMAC_PC_MTE);
bgmac_miiconfig(bgmac);
if (bgmac->mii_bus)
bgmac->mii_bus->reset(bgmac->mii_bus);
netdev_reset_queue(bgmac->net_dev);
}
static void bgmac_chip_intrs_on(struct bgmac *bgmac)
{
bgmac_write(bgmac, BGMAC_INT_MASK, bgmac->int_mask);
}
static void bgmac_chip_intrs_off(struct bgmac *bgmac)
{
bgmac_write(bgmac, BGMAC_INT_MASK, 0);
bgmac_read(bgmac, BGMAC_INT_MASK);
}
/* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/gmac_enable */
static void bgmac_enable(struct bgmac *bgmac)
{
u32 cmdcfg_sr;
u32 cmdcfg;
u32 mode;
if (bgmac->feature_flags & BGMAC_FEAT_CMDCFG_SR_REV4)
cmdcfg_sr = BGMAC_CMDCFG_SR_REV4;
else
cmdcfg_sr = BGMAC_CMDCFG_SR_REV0;
cmdcfg = bgmac_read(bgmac, BGMAC_CMDCFG);
bgmac_cmdcfg_maskset(bgmac, ~(BGMAC_CMDCFG_TE | BGMAC_CMDCFG_RE),
cmdcfg_sr, true);
udelay(2);
cmdcfg |= BGMAC_CMDCFG_TE | BGMAC_CMDCFG_RE;
bgmac_write(bgmac, BGMAC_CMDCFG, cmdcfg);
mode = (bgmac_read(bgmac, BGMAC_DEV_STATUS) & BGMAC_DS_MM_MASK) >>
BGMAC_DS_MM_SHIFT;
if (bgmac->feature_flags & BGMAC_FEAT_CLKCTLST || mode != 0)
bgmac_set(bgmac, BCMA_CLKCTLST, BCMA_CLKCTLST_FORCEHT);
if (!(bgmac->feature_flags & BGMAC_FEAT_CLKCTLST) && mode == 2)
bgmac_cco_ctl_maskset(bgmac, 1, ~0,
BGMAC_CHIPCTL_1_RXC_DLL_BYPASS);
if (bgmac->feature_flags & (BGMAC_FEAT_FLW_CTRL1 |
BGMAC_FEAT_FLW_CTRL2)) {
u32 fl_ctl;
if (bgmac->feature_flags & BGMAC_FEAT_FLW_CTRL1)
fl_ctl = 0x2300e1;
else
fl_ctl = 0x03cb04cb;
bgmac_write(bgmac, BGMAC_FLOW_CTL_THRESH, fl_ctl);
bgmac_write(bgmac, BGMAC_PAUSE_CTL, 0x27fff);
}
if (bgmac->feature_flags & BGMAC_FEAT_SET_RXQ_CLK) {
u32 rxq_ctl;
u16 bp_clk;
u8 mdp;
rxq_ctl = bgmac_read(bgmac, BGMAC_RXQ_CTL);
rxq_ctl &= ~BGMAC_RXQ_CTL_MDP_MASK;
bp_clk = bgmac_get_bus_clock(bgmac) / 1000000;
mdp = (bp_clk * 128 / 1000) - 3;
rxq_ctl |= (mdp << BGMAC_RXQ_CTL_MDP_SHIFT);
bgmac_write(bgmac, BGMAC_RXQ_CTL, rxq_ctl);
}
}
/* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipinit */
static void bgmac_chip_init(struct bgmac *bgmac)
{
/* 1 interrupt per received frame */
bgmac_write(bgmac, BGMAC_INT_RECV_LAZY, 1 << BGMAC_IRL_FC_SHIFT);
/* Enable 802.3x tx flow control (honor received PAUSE frames) */
bgmac_cmdcfg_maskset(bgmac, ~BGMAC_CMDCFG_RPI, 0, true);
bgmac_set_rx_mode(bgmac->net_dev);
bgmac_write_mac_address(bgmac, bgmac->net_dev->dev_addr);
if (bgmac->loopback)
bgmac_cmdcfg_maskset(bgmac, ~0, BGMAC_CMDCFG_ML, false);
else
bgmac_cmdcfg_maskset(bgmac, ~BGMAC_CMDCFG_ML, 0, false);
bgmac_write(bgmac, BGMAC_RXMAX_LENGTH, 32 + ETHER_MAX_LEN);
bgmac_chip_intrs_on(bgmac);
bgmac_enable(bgmac);
}
static irqreturn_t bgmac_interrupt(int irq, void *dev_id)
{
struct bgmac *bgmac = netdev_priv(dev_id);
u32 int_status = bgmac_read(bgmac, BGMAC_INT_STATUS);
int_status &= bgmac->int_mask;
if (!int_status)
return IRQ_NONE;
int_status &= ~(BGMAC_IS_TX0 | BGMAC_IS_RX);
if (int_status)
dev_err(bgmac->dev, "Unknown IRQs: 0x%08X\n", int_status);
/* Disable new interrupts until handling existing ones */
bgmac_chip_intrs_off(bgmac);
napi_schedule(&bgmac->napi);
return IRQ_HANDLED;
}
static int bgmac_poll(struct napi_struct *napi, int weight)
{
struct bgmac *bgmac = container_of(napi, struct bgmac, napi);
int handled = 0;
/* Ack */
bgmac_write(bgmac, BGMAC_INT_STATUS, ~0);
bgmac_dma_tx_free(bgmac, &bgmac->tx_ring[0]);
handled += bgmac_dma_rx_read(bgmac, &bgmac->rx_ring[0], weight);
/* Poll again if more events arrived in the meantime */
if (bgmac_read(bgmac, BGMAC_INT_STATUS) & (BGMAC_IS_TX0 | BGMAC_IS_RX))
return weight;
if (handled < weight) {
napi_complete(napi);
bgmac_chip_intrs_on(bgmac);
}
return handled;
}
/**************************************************
* net_device_ops
**************************************************/
static int bgmac_open(struct net_device *net_dev)
{
struct bgmac *bgmac = netdev_priv(net_dev);
int err = 0;
bgmac_chip_reset(bgmac);
err = bgmac_dma_init(bgmac);
if (err)
return err;
/* Specs say about reclaiming rings here, but we do that in DMA init */
bgmac_chip_init(bgmac);
err = request_irq(bgmac->irq, bgmac_interrupt, IRQF_SHARED,
KBUILD_MODNAME, net_dev);
if (err < 0) {
dev_err(bgmac->dev, "IRQ request error: %d!\n", err);
bgmac_dma_cleanup(bgmac);
return err;
}
napi_enable(&bgmac->napi);
phy_start(net_dev->phydev);
netif_start_queue(net_dev);
return 0;
}
static int bgmac_stop(struct net_device *net_dev)
{
struct bgmac *bgmac = netdev_priv(net_dev);
netif_carrier_off(net_dev);
phy_stop(net_dev->phydev);
napi_disable(&bgmac->napi);
bgmac_chip_intrs_off(bgmac);
free_irq(bgmac->irq, net_dev);
bgmac_chip_reset(bgmac);
bgmac_dma_cleanup(bgmac);
return 0;
}
static netdev_tx_t bgmac_start_xmit(struct sk_buff *skb,
struct net_device *net_dev)
{
struct bgmac *bgmac = netdev_priv(net_dev);
struct bgmac_dma_ring *ring;
/* No QOS support yet */
ring = &bgmac->tx_ring[0];
return bgmac_dma_tx_add(bgmac, ring, skb);
}
static int bgmac_set_mac_address(struct net_device *net_dev, void *addr)
{
struct bgmac *bgmac = netdev_priv(net_dev);
int ret;
ret = eth_prepare_mac_addr_change(net_dev, addr);
if (ret < 0)
return ret;
bgmac_write_mac_address(bgmac, (u8 *)addr);
eth_commit_mac_addr_change(net_dev, addr);
return 0;
}
static int bgmac_ioctl(struct net_device *net_dev, struct ifreq *ifr, int cmd)
{
if (!netif_running(net_dev))
return -EINVAL;
return phy_mii_ioctl(net_dev->phydev, ifr, cmd);
}
static const struct net_device_ops bgmac_netdev_ops = {
.ndo_open = bgmac_open,
.ndo_stop = bgmac_stop,
.ndo_start_xmit = bgmac_start_xmit,
.ndo_set_rx_mode = bgmac_set_rx_mode,
.ndo_set_mac_address = bgmac_set_mac_address,
.ndo_validate_addr = eth_validate_addr,
.ndo_do_ioctl = bgmac_ioctl,
};
/**************************************************
* ethtool_ops
**************************************************/
struct bgmac_stat {
u8 size;
u32 offset;
const char *name;
};
static struct bgmac_stat bgmac_get_strings_stats[] = {
{ 8, BGMAC_TX_GOOD_OCTETS, "tx_good_octets" },
{ 4, BGMAC_TX_GOOD_PKTS, "tx_good" },
{ 8, BGMAC_TX_OCTETS, "tx_octets" },
{ 4, BGMAC_TX_PKTS, "tx_pkts" },
{ 4, BGMAC_TX_BROADCAST_PKTS, "tx_broadcast" },
{ 4, BGMAC_TX_MULTICAST_PKTS, "tx_multicast" },
{ 4, BGMAC_TX_LEN_64, "tx_64" },
{ 4, BGMAC_TX_LEN_65_TO_127, "tx_65_127" },
{ 4, BGMAC_TX_LEN_128_TO_255, "tx_128_255" },
{ 4, BGMAC_TX_LEN_256_TO_511, "tx_256_511" },
{ 4, BGMAC_TX_LEN_512_TO_1023, "tx_512_1023" },
{ 4, BGMAC_TX_LEN_1024_TO_1522, "tx_1024_1522" },
{ 4, BGMAC_TX_LEN_1523_TO_2047, "tx_1523_2047" },
{ 4, BGMAC_TX_LEN_2048_TO_4095, "tx_2048_4095" },
{ 4, BGMAC_TX_LEN_4096_TO_8191, "tx_4096_8191" },
{ 4, BGMAC_TX_LEN_8192_TO_MAX, "tx_8192_max" },
{ 4, BGMAC_TX_JABBER_PKTS, "tx_jabber" },
{ 4, BGMAC_TX_OVERSIZE_PKTS, "tx_oversize" },
{ 4, BGMAC_TX_FRAGMENT_PKTS, "tx_fragment" },
{ 4, BGMAC_TX_UNDERRUNS, "tx_underruns" },
{ 4, BGMAC_TX_TOTAL_COLS, "tx_total_cols" },
{ 4, BGMAC_TX_SINGLE_COLS, "tx_single_cols" },
{ 4, BGMAC_TX_MULTIPLE_COLS, "tx_multiple_cols" },
{ 4, BGMAC_TX_EXCESSIVE_COLS, "tx_excessive_cols" },
{ 4, BGMAC_TX_LATE_COLS, "tx_late_cols" },
{ 4, BGMAC_TX_DEFERED, "tx_defered" },
{ 4, BGMAC_TX_CARRIER_LOST, "tx_carrier_lost" },
{ 4, BGMAC_TX_PAUSE_PKTS, "tx_pause" },
{ 4, BGMAC_TX_UNI_PKTS, "tx_unicast" },
{ 4, BGMAC_TX_Q0_PKTS, "tx_q0" },
{ 8, BGMAC_TX_Q0_OCTETS, "tx_q0_octets" },
{ 4, BGMAC_TX_Q1_PKTS, "tx_q1" },
{ 8, BGMAC_TX_Q1_OCTETS, "tx_q1_octets" },
{ 4, BGMAC_TX_Q2_PKTS, "tx_q2" },
{ 8, BGMAC_TX_Q2_OCTETS, "tx_q2_octets" },
{ 4, BGMAC_TX_Q3_PKTS, "tx_q3" },
{ 8, BGMAC_TX_Q3_OCTETS, "tx_q3_octets" },
{ 8, BGMAC_RX_GOOD_OCTETS, "rx_good_octets" },
{ 4, BGMAC_RX_GOOD_PKTS, "rx_good" },
{ 8, BGMAC_RX_OCTETS, "rx_octets" },
{ 4, BGMAC_RX_PKTS, "rx_pkts" },
{ 4, BGMAC_RX_BROADCAST_PKTS, "rx_broadcast" },
{ 4, BGMAC_RX_MULTICAST_PKTS, "rx_multicast" },
{ 4, BGMAC_RX_LEN_64, "rx_64" },
{ 4, BGMAC_RX_LEN_65_TO_127, "rx_65_127" },
{ 4, BGMAC_RX_LEN_128_TO_255, "rx_128_255" },
{ 4, BGMAC_RX_LEN_256_TO_511, "rx_256_511" },
{ 4, BGMAC_RX_LEN_512_TO_1023, "rx_512_1023" },
{ 4, BGMAC_RX_LEN_1024_TO_1522, "rx_1024_1522" },
{ 4, BGMAC_RX_LEN_1523_TO_2047, "rx_1523_2047" },
{ 4, BGMAC_RX_LEN_2048_TO_4095, "rx_2048_4095" },
{ 4, BGMAC_RX_LEN_4096_TO_8191, "rx_4096_8191" },
{ 4, BGMAC_RX_LEN_8192_TO_MAX, "rx_8192_max" },
{ 4, BGMAC_RX_JABBER_PKTS, "rx_jabber" },
{ 4, BGMAC_RX_OVERSIZE_PKTS, "rx_oversize" },
{ 4, BGMAC_RX_FRAGMENT_PKTS, "rx_fragment" },
{ 4, BGMAC_RX_MISSED_PKTS, "rx_missed" },
{ 4, BGMAC_RX_CRC_ALIGN_ERRS, "rx_crc_align" },
{ 4, BGMAC_RX_UNDERSIZE, "rx_undersize" },
{ 4, BGMAC_RX_CRC_ERRS, "rx_crc" },
{ 4, BGMAC_RX_ALIGN_ERRS, "rx_align" },
{ 4, BGMAC_RX_SYMBOL_ERRS, "rx_symbol" },
{ 4, BGMAC_RX_PAUSE_PKTS, "rx_pause" },
{ 4, BGMAC_RX_NONPAUSE_PKTS, "rx_nonpause" },
{ 4, BGMAC_RX_SACHANGES, "rx_sa_changes" },
{ 4, BGMAC_RX_UNI_PKTS, "rx_unicast" },
};
#define BGMAC_STATS_LEN ARRAY_SIZE(bgmac_get_strings_stats)
static int bgmac_get_sset_count(struct net_device *dev, int string_set)
{
switch (string_set) {
case ETH_SS_STATS:
return BGMAC_STATS_LEN;
}
return -EOPNOTSUPP;
}
static void bgmac_get_strings(struct net_device *dev, u32 stringset,
u8 *data)
{
int i;
if (stringset != ETH_SS_STATS)
return;
for (i = 0; i < BGMAC_STATS_LEN; i++)
strlcpy(data + i * ETH_GSTRING_LEN,
bgmac_get_strings_stats[i].name, ETH_GSTRING_LEN);
}
static void bgmac_get_ethtool_stats(struct net_device *dev,
struct ethtool_stats *ss, uint64_t *data)
{
struct bgmac *bgmac = netdev_priv(dev);
const struct bgmac_stat *s;
unsigned int i;
u64 val;
if (!netif_running(dev))
return;
for (i = 0; i < BGMAC_STATS_LEN; i++) {
s = &bgmac_get_strings_stats[i];
val = 0;
if (s->size == 8)
val = (u64)bgmac_read(bgmac, s->offset + 4) << 32;
val |= bgmac_read(bgmac, s->offset);
data[i] = val;
}
}
static void bgmac_get_drvinfo(struct net_device *net_dev,
struct ethtool_drvinfo *info)
{
strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver));
strlcpy(info->bus_info, "AXI", sizeof(info->bus_info));
}
static const struct ethtool_ops bgmac_ethtool_ops = {
.get_strings = bgmac_get_strings,
.get_sset_count = bgmac_get_sset_count,
.get_ethtool_stats = bgmac_get_ethtool_stats,
.get_drvinfo = bgmac_get_drvinfo,
.get_link_ksettings = phy_ethtool_get_link_ksettings,
.set_link_ksettings = phy_ethtool_set_link_ksettings,
};
/**************************************************
* MII
**************************************************/
static void bgmac_adjust_link(struct net_device *net_dev)
{
struct bgmac *bgmac = netdev_priv(net_dev);
struct phy_device *phy_dev = net_dev->phydev;
bool update = false;
if (phy_dev->link) {
if (phy_dev->speed != bgmac->mac_speed) {
bgmac->mac_speed = phy_dev->speed;
update = true;
}
if (phy_dev->duplex != bgmac->mac_duplex) {
bgmac->mac_duplex = phy_dev->duplex;
update = true;
}
}
if (update) {
bgmac_mac_speed(bgmac);
phy_print_status(phy_dev);
}
}
static int bgmac_phy_connect_direct(struct bgmac *bgmac)
{
struct fixed_phy_status fphy_status = {
.link = 1,
.speed = SPEED_1000,
.duplex = DUPLEX_FULL,
};
struct phy_device *phy_dev;
int err;
phy_dev = fixed_phy_register(PHY_POLL, &fphy_status, -1, NULL);
if (!phy_dev || IS_ERR(phy_dev)) {
dev_err(bgmac->dev, "Failed to register fixed PHY device\n");
return -ENODEV;
}
err = phy_connect_direct(bgmac->net_dev, phy_dev, bgmac_adjust_link,
PHY_INTERFACE_MODE_MII);
if (err) {
dev_err(bgmac->dev, "Connecting PHY failed\n");
return err;
}
return err;
}
static int bgmac_phy_connect(struct bgmac *bgmac)
{
struct phy_device *phy_dev;
char bus_id[MII_BUS_ID_SIZE + 3];
/* Connect to the PHY */
snprintf(bus_id, sizeof(bus_id), PHY_ID_FMT, bgmac->mii_bus->id,
bgmac->phyaddr);
phy_dev = phy_connect(bgmac->net_dev, bus_id, &bgmac_adjust_link,
PHY_INTERFACE_MODE_MII);
if (IS_ERR(phy_dev)) {
dev_err(bgmac->dev, "PHY connection failed\n");
return PTR_ERR(phy_dev);
}
return 0;
}
int bgmac_enet_probe(struct bgmac *info)
{
struct net_device *net_dev;
struct bgmac *bgmac;
int err;
/* Allocation and references */
net_dev = alloc_etherdev(sizeof(*bgmac));
if (!net_dev)
return -ENOMEM;
net_dev->netdev_ops = &bgmac_netdev_ops;
net_dev->ethtool_ops = &bgmac_ethtool_ops;
bgmac = netdev_priv(net_dev);
memcpy(bgmac, info, sizeof(*bgmac));
bgmac->net_dev = net_dev;
net_dev->irq = bgmac->irq;
SET_NETDEV_DEV(net_dev, bgmac->dev);
if (!is_valid_ether_addr(bgmac->mac_addr)) {
dev_err(bgmac->dev, "Invalid MAC addr: %pM\n",
bgmac->mac_addr);
eth_random_addr(bgmac->mac_addr);
dev_warn(bgmac->dev, "Using random MAC: %pM\n",
bgmac->mac_addr);
}
ether_addr_copy(net_dev->dev_addr, bgmac->mac_addr);
/* This (reset &) enable is not preset in specs or reference driver but
* Broadcom does it in arch PCI code when enabling fake PCI device.
*/
bgmac_clk_enable(bgmac, 0);
/* This seems to be fixing IRQ by assigning OOB #6 to the core */
if (bgmac->feature_flags & BGMAC_FEAT_IRQ_ID_OOB_6)
bgmac_idm_write(bgmac, BCMA_OOB_SEL_OUT_A30, 0x86);
bgmac_chip_reset(bgmac);
err = bgmac_dma_alloc(bgmac);
if (err) {
dev_err(bgmac->dev, "Unable to alloc memory for DMA\n");
goto err_netdev_free;
}
bgmac->int_mask = BGMAC_IS_ERRMASK | BGMAC_IS_RX | BGMAC_IS_TX_MASK;
if (bcm47xx_nvram_getenv("et0_no_txint", NULL, 0) == 0)
bgmac->int_mask &= ~BGMAC_IS_TX_MASK;
netif_napi_add(net_dev, &bgmac->napi, bgmac_poll, BGMAC_WEIGHT);
if (!bgmac->mii_bus)
err = bgmac_phy_connect_direct(bgmac);
else
err = bgmac_phy_connect(bgmac);
if (err) {
dev_err(bgmac->dev, "Cannot connect to phy\n");
goto err_dma_free;
}
net_dev->features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
net_dev->hw_features = net_dev->features;
net_dev->vlan_features = net_dev->features;
err = register_netdev(bgmac->net_dev);
if (err) {
dev_err(bgmac->dev, "Cannot register net device\n");
goto err_phy_disconnect;
}
netif_carrier_off(net_dev);
return 0;
err_phy_disconnect:
phy_disconnect(net_dev->phydev);
err_dma_free:
bgmac_dma_free(bgmac);
err_netdev_free:
free_netdev(net_dev);
return err;
}
EXPORT_SYMBOL_GPL(bgmac_enet_probe);
void bgmac_enet_remove(struct bgmac *bgmac)
{
unregister_netdev(bgmac->net_dev);
phy_disconnect(bgmac->net_dev->phydev);
netif_napi_del(&bgmac->napi);
bgmac_dma_free(bgmac);
free_netdev(bgmac->net_dev);
}
EXPORT_SYMBOL_GPL(bgmac_enet_remove);
MODULE_AUTHOR("Rafał Miłecki");
MODULE_LICENSE("GPL");