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path: root/drivers/net/pasemi_mac.c
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Diffstat (limited to 'drivers/net/pasemi_mac.c')
-rw-r--r--drivers/net/pasemi_mac.c960
1 files changed, 602 insertions, 358 deletions
diff --git a/drivers/net/pasemi_mac.c b/drivers/net/pasemi_mac.c
index 0b3066a6fe4..9f9a421c99b 100644
--- a/drivers/net/pasemi_mac.c
+++ b/drivers/net/pasemi_mac.c
@@ -34,24 +34,29 @@
#include <net/checksum.h>
#include <asm/irq.h>
+#include <asm/firmware.h>
#include "pasemi_mac.h"
+/* We have our own align, since ppc64 in general has it at 0 because
+ * of design flaws in some of the server bridge chips. However, for
+ * PWRficient doing the unaligned copies is more expensive than doing
+ * unaligned DMA, so make sure the data is aligned instead.
+ */
+#define LOCAL_SKB_ALIGN 2
/* TODO list
*
- * - Get rid of pci_{read,write}_config(), map registers with ioremap
- * for performance
- * - PHY support
* - Multicast support
* - Large MTU support
- * - Other performance improvements
+ * - SW LRO
+ * - Multiqueue RX/TX
*/
/* Must be a power of two */
-#define RX_RING_SIZE 512
-#define TX_RING_SIZE 512
+#define RX_RING_SIZE 4096
+#define TX_RING_SIZE 4096
#define DEFAULT_MSG_ENABLE \
(NETIF_MSG_DRV | \
@@ -63,12 +68,16 @@
NETIF_MSG_RX_ERR | \
NETIF_MSG_TX_ERR)
-#define TX_DESC(mac, num) ((mac)->tx->desc[(num) & (TX_RING_SIZE-1)])
-#define TX_DESC_INFO(mac, num) ((mac)->tx->desc_info[(num) & (TX_RING_SIZE-1)])
-#define RX_DESC(mac, num) ((mac)->rx->desc[(num) & (RX_RING_SIZE-1)])
-#define RX_DESC_INFO(mac, num) ((mac)->rx->desc_info[(num) & (RX_RING_SIZE-1)])
+#define TX_RING(mac, num) ((mac)->tx->ring[(num) & (TX_RING_SIZE-1)])
+#define TX_RING_INFO(mac, num) ((mac)->tx->ring_info[(num) & (TX_RING_SIZE-1)])
+#define RX_RING(mac, num) ((mac)->rx->ring[(num) & (RX_RING_SIZE-1)])
+#define RX_RING_INFO(mac, num) ((mac)->rx->ring_info[(num) & (RX_RING_SIZE-1)])
#define RX_BUFF(mac, num) ((mac)->rx->buffers[(num) & (RX_RING_SIZE-1)])
+#define RING_USED(ring) (((ring)->next_to_fill - (ring)->next_to_clean) \
+ & ((ring)->size - 1))
+#define RING_AVAIL(ring) ((ring->size) - RING_USED(ring))
+
#define BUF_SIZE 1646 /* 1500 MTU + ETH_HLEN + VLAN_HLEN + 2 64B cachelines */
MODULE_LICENSE("GPL");
@@ -81,6 +90,43 @@ MODULE_PARM_DESC(debug, "PA Semi MAC bitmapped debugging message enable value");
static struct pasdma_status *dma_status;
+static int translation_enabled(void)
+{
+#if defined(CONFIG_PPC_PASEMI_IOMMU_DMA_FORCE)
+ return 1;
+#else
+ return firmware_has_feature(FW_FEATURE_LPAR);
+#endif
+}
+
+static void write_iob_reg(struct pasemi_mac *mac, unsigned int reg,
+ unsigned int val)
+{
+ out_le32(mac->iob_regs+reg, val);
+}
+
+static unsigned int read_mac_reg(struct pasemi_mac *mac, unsigned int reg)
+{
+ return in_le32(mac->regs+reg);
+}
+
+static void write_mac_reg(struct pasemi_mac *mac, unsigned int reg,
+ unsigned int val)
+{
+ out_le32(mac->regs+reg, val);
+}
+
+static unsigned int read_dma_reg(struct pasemi_mac *mac, unsigned int reg)
+{
+ return in_le32(mac->dma_regs+reg);
+}
+
+static void write_dma_reg(struct pasemi_mac *mac, unsigned int reg,
+ unsigned int val)
+{
+ out_le32(mac->dma_regs+reg, val);
+}
+
static int pasemi_get_mac_addr(struct pasemi_mac *mac)
{
struct pci_dev *pdev = mac->pdev;
@@ -128,11 +174,36 @@ static int pasemi_get_mac_addr(struct pasemi_mac *mac)
return 0;
}
+static int pasemi_mac_unmap_tx_skb(struct pasemi_mac *mac,
+ struct sk_buff *skb,
+ dma_addr_t *dmas)
+{
+ int f;
+ int nfrags = skb_shinfo(skb)->nr_frags;
+
+ pci_unmap_single(mac->dma_pdev, dmas[0], skb_headlen(skb),
+ PCI_DMA_TODEVICE);
+
+ for (f = 0; f < nfrags; f++) {
+ skb_frag_t *frag = &skb_shinfo(skb)->frags[f];
+
+ pci_unmap_page(mac->dma_pdev, dmas[f+1], frag->size,
+ PCI_DMA_TODEVICE);
+ }
+ dev_kfree_skb_irq(skb);
+
+ /* Freed descriptor slot + main SKB ptr + nfrags additional ptrs,
+ * aligned up to a power of 2
+ */
+ return (nfrags + 3) & ~1;
+}
+
static int pasemi_mac_setup_rx_resources(struct net_device *dev)
{
struct pasemi_mac_rxring *ring;
struct pasemi_mac *mac = netdev_priv(dev);
int chan_id = mac->dma_rxch;
+ unsigned int cfg;
ring = kzalloc(sizeof(*ring), GFP_KERNEL);
@@ -141,22 +212,22 @@ static int pasemi_mac_setup_rx_resources(struct net_device *dev)
spin_lock_init(&ring->lock);
- ring->desc_info = kzalloc(sizeof(struct pasemi_mac_buffer) *
+ ring->size = RX_RING_SIZE;
+ ring->ring_info = kzalloc(sizeof(struct pasemi_mac_buffer) *
RX_RING_SIZE, GFP_KERNEL);
- if (!ring->desc_info)
- goto out_desc_info;
+ if (!ring->ring_info)
+ goto out_ring_info;
/* Allocate descriptors */
- ring->desc = dma_alloc_coherent(&mac->dma_pdev->dev,
- RX_RING_SIZE *
- sizeof(struct pas_dma_xct_descr),
+ ring->ring = dma_alloc_coherent(&mac->dma_pdev->dev,
+ RX_RING_SIZE * sizeof(u64),
&ring->dma, GFP_KERNEL);
- if (!ring->desc)
- goto out_desc;
+ if (!ring->ring)
+ goto out_ring_desc;
- memset(ring->desc, 0, RX_RING_SIZE * sizeof(struct pas_dma_xct_descr));
+ memset(ring->ring, 0, RX_RING_SIZE * sizeof(u64));
ring->buffers = dma_alloc_coherent(&mac->dma_pdev->dev,
RX_RING_SIZE * sizeof(u64),
@@ -166,22 +237,34 @@ static int pasemi_mac_setup_rx_resources(struct net_device *dev)
memset(ring->buffers, 0, RX_RING_SIZE * sizeof(u64));
- pci_write_config_dword(mac->dma_pdev, PAS_DMA_RXCHAN_BASEL(chan_id),
- PAS_DMA_RXCHAN_BASEL_BRBL(ring->dma));
+ write_dma_reg(mac, PAS_DMA_RXCHAN_BASEL(chan_id), PAS_DMA_RXCHAN_BASEL_BRBL(ring->dma));
+
+ write_dma_reg(mac, PAS_DMA_RXCHAN_BASEU(chan_id),
+ PAS_DMA_RXCHAN_BASEU_BRBH(ring->dma >> 32) |
+ PAS_DMA_RXCHAN_BASEU_SIZ(RX_RING_SIZE >> 3));
+
+ cfg = PAS_DMA_RXCHAN_CFG_HBU(2);
+
+ if (translation_enabled())
+ cfg |= PAS_DMA_RXCHAN_CFG_CTR;
- pci_write_config_dword(mac->dma_pdev, PAS_DMA_RXCHAN_BASEU(chan_id),
- PAS_DMA_RXCHAN_BASEU_BRBH(ring->dma >> 32) |
- PAS_DMA_RXCHAN_BASEU_SIZ(RX_RING_SIZE >> 2));
+ write_dma_reg(mac, PAS_DMA_RXCHAN_CFG(chan_id), cfg);
- pci_write_config_dword(mac->dma_pdev, PAS_DMA_RXCHAN_CFG(chan_id),
- PAS_DMA_RXCHAN_CFG_HBU(1));
+ write_dma_reg(mac, PAS_DMA_RXINT_BASEL(mac->dma_if),
+ PAS_DMA_RXINT_BASEL_BRBL(ring->buf_dma));
- pci_write_config_dword(mac->dma_pdev, PAS_DMA_RXINT_BASEL(mac->dma_if),
- PAS_DMA_RXINT_BASEL_BRBL(__pa(ring->buffers)));
+ write_dma_reg(mac, PAS_DMA_RXINT_BASEU(mac->dma_if),
+ PAS_DMA_RXINT_BASEU_BRBH(ring->buf_dma >> 32) |
+ PAS_DMA_RXINT_BASEU_SIZ(RX_RING_SIZE >> 3));
- pci_write_config_dword(mac->dma_pdev, PAS_DMA_RXINT_BASEU(mac->dma_if),
- PAS_DMA_RXINT_BASEU_BRBH(__pa(ring->buffers) >> 32) |
- PAS_DMA_RXINT_BASEU_SIZ(RX_RING_SIZE >> 3));
+ cfg = PAS_DMA_RXINT_CFG_DHL(3) | PAS_DMA_RXINT_CFG_L2 |
+ PAS_DMA_RXINT_CFG_LW | PAS_DMA_RXINT_CFG_RBP |
+ PAS_DMA_RXINT_CFG_HEN;
+
+ if (translation_enabled())
+ cfg |= PAS_DMA_RXINT_CFG_ITRR | PAS_DMA_RXINT_CFG_ITR;
+
+ write_dma_reg(mac, PAS_DMA_RXINT_CFG(mac->dma_if), cfg);
ring->next_to_fill = 0;
ring->next_to_clean = 0;
@@ -194,11 +277,11 @@ static int pasemi_mac_setup_rx_resources(struct net_device *dev)
out_buffers:
dma_free_coherent(&mac->dma_pdev->dev,
- RX_RING_SIZE * sizeof(struct pas_dma_xct_descr),
- mac->rx->desc, mac->rx->dma);
-out_desc:
- kfree(ring->desc_info);
-out_desc_info:
+ RX_RING_SIZE * sizeof(u64),
+ mac->rx->ring, mac->rx->dma);
+out_ring_desc:
+ kfree(ring->ring_info);
+out_ring_info:
kfree(ring);
out_ring:
return -ENOMEM;
@@ -211,6 +294,7 @@ static int pasemi_mac_setup_tx_resources(struct net_device *dev)
u32 val;
int chan_id = mac->dma_txch;
struct pasemi_mac_txring *ring;
+ unsigned int cfg;
ring = kzalloc(sizeof(*ring), GFP_KERNEL);
if (!ring)
@@ -218,35 +302,39 @@ static int pasemi_mac_setup_tx_resources(struct net_device *dev)
spin_lock_init(&ring->lock);
- ring->desc_info = kzalloc(sizeof(struct pasemi_mac_buffer) *
+ ring->size = TX_RING_SIZE;
+ ring->ring_info = kzalloc(sizeof(struct pasemi_mac_buffer) *
TX_RING_SIZE, GFP_KERNEL);
- if (!ring->desc_info)
- goto out_desc_info;
+ if (!ring->ring_info)
+ goto out_ring_info;
/* Allocate descriptors */
- ring->desc = dma_alloc_coherent(&mac->dma_pdev->dev,
- TX_RING_SIZE *
- sizeof(struct pas_dma_xct_descr),
+ ring->ring = dma_alloc_coherent(&mac->dma_pdev->dev,
+ TX_RING_SIZE * sizeof(u64),
&ring->dma, GFP_KERNEL);
- if (!ring->desc)
- goto out_desc;
+ if (!ring->ring)
+ goto out_ring_desc;
- memset(ring->desc, 0, TX_RING_SIZE * sizeof(struct pas_dma_xct_descr));
+ memset(ring->ring, 0, TX_RING_SIZE * sizeof(u64));
- pci_write_config_dword(mac->dma_pdev, PAS_DMA_TXCHAN_BASEL(chan_id),
- PAS_DMA_TXCHAN_BASEL_BRBL(ring->dma));
+ write_dma_reg(mac, PAS_DMA_TXCHAN_BASEL(chan_id),
+ PAS_DMA_TXCHAN_BASEL_BRBL(ring->dma));
val = PAS_DMA_TXCHAN_BASEU_BRBH(ring->dma >> 32);
- val |= PAS_DMA_TXCHAN_BASEU_SIZ(TX_RING_SIZE >> 2);
+ val |= PAS_DMA_TXCHAN_BASEU_SIZ(TX_RING_SIZE >> 3);
+
+ write_dma_reg(mac, PAS_DMA_TXCHAN_BASEU(chan_id), val);
- pci_write_config_dword(mac->dma_pdev, PAS_DMA_TXCHAN_BASEU(chan_id), val);
+ cfg = PAS_DMA_TXCHAN_CFG_TY_IFACE |
+ PAS_DMA_TXCHAN_CFG_TATTR(mac->dma_if) |
+ PAS_DMA_TXCHAN_CFG_UP |
+ PAS_DMA_TXCHAN_CFG_WT(2);
- pci_write_config_dword(mac->dma_pdev, PAS_DMA_TXCHAN_CFG(chan_id),
- PAS_DMA_TXCHAN_CFG_TY_IFACE |
- PAS_DMA_TXCHAN_CFG_TATTR(mac->dma_if) |
- PAS_DMA_TXCHAN_CFG_UP |
- PAS_DMA_TXCHAN_CFG_WT(2));
+ if (translation_enabled())
+ cfg |= PAS_DMA_TXCHAN_CFG_TRD | PAS_DMA_TXCHAN_CFG_TRR;
- ring->next_to_use = 0;
+ write_dma_reg(mac, PAS_DMA_TXCHAN_CFG(chan_id), cfg);
+
+ ring->next_to_fill = 0;
ring->next_to_clean = 0;
snprintf(ring->irq_name, sizeof(ring->irq_name),
@@ -255,9 +343,9 @@ static int pasemi_mac_setup_tx_resources(struct net_device *dev)
return 0;
-out_desc:
- kfree(ring->desc_info);
-out_desc_info:
+out_ring_desc:
+ kfree(ring->ring_info);
+out_ring_info:
kfree(ring);
out_ring:
return -ENOMEM;
@@ -266,33 +354,37 @@ out_ring:
static void pasemi_mac_free_tx_resources(struct net_device *dev)
{
struct pasemi_mac *mac = netdev_priv(dev);
- unsigned int i;
+ unsigned int i, j;
struct pasemi_mac_buffer *info;
- struct pas_dma_xct_descr *dp;
-
- for (i = 0; i < TX_RING_SIZE; i++) {
- info = &TX_DESC_INFO(mac, i);
- dp = &TX_DESC(mac, i);
- if (info->dma) {
- if (info->skb) {
- pci_unmap_single(mac->dma_pdev,
- info->dma,
- info->skb->len,
- PCI_DMA_TODEVICE);
- dev_kfree_skb_any(info->skb);
- }
- info->dma = 0;
- info->skb = NULL;
- dp->mactx = 0;
- dp->ptr = 0;
- }
+ dma_addr_t dmas[MAX_SKB_FRAGS+1];
+ int freed;
+ int start, limit;
+
+ start = mac->tx->next_to_clean;
+ limit = mac->tx->next_to_fill;
+
+ /* Compensate for when fill has wrapped and clean has not */
+ if (start > limit)
+ limit += TX_RING_SIZE;
+
+ for (i = start; i < limit; i += freed) {
+ info = &TX_RING_INFO(mac, i+1);
+ if (info->dma && info->skb) {
+ for (j = 0; j <= skb_shinfo(info->skb)->nr_frags; j++)
+ dmas[j] = TX_RING_INFO(mac, i+1+j).dma;
+ freed = pasemi_mac_unmap_tx_skb(mac, info->skb, dmas);
+ } else
+ freed = 2;
}
+ for (i = 0; i < TX_RING_SIZE; i++)
+ TX_RING(mac, i) = 0;
+
dma_free_coherent(&mac->dma_pdev->dev,
- TX_RING_SIZE * sizeof(struct pas_dma_xct_descr),
- mac->tx->desc, mac->tx->dma);
+ TX_RING_SIZE * sizeof(u64),
+ mac->tx->ring, mac->tx->dma);
- kfree(mac->tx->desc_info);
+ kfree(mac->tx->ring_info);
kfree(mac->tx);
mac->tx = NULL;
}
@@ -302,72 +394,66 @@ static void pasemi_mac_free_rx_resources(struct net_device *dev)
struct pasemi_mac *mac = netdev_priv(dev);
unsigned int i;
struct pasemi_mac_buffer *info;
- struct pas_dma_xct_descr *dp;
for (i = 0; i < RX_RING_SIZE; i++) {
- info = &RX_DESC_INFO(mac, i);
- dp = &RX_DESC(mac, i);
- if (info->skb) {
- if (info->dma) {
- pci_unmap_single(mac->dma_pdev,
- info->dma,
- info->skb->len,
- PCI_DMA_FROMDEVICE);
- dev_kfree_skb_any(info->skb);
- }
- info->dma = 0;
- info->skb = NULL;
- dp->macrx = 0;
- dp->ptr = 0;
+ info = &RX_RING_INFO(mac, i);
+ if (info->skb && info->dma) {
+ pci_unmap_single(mac->dma_pdev,
+ info->dma,
+ info->skb->len,
+ PCI_DMA_FROMDEVICE);
+ dev_kfree_skb_any(info->skb);
}
+ info->dma = 0;
+ info->skb = NULL;
}
+ for (i = 0; i < RX_RING_SIZE; i++)
+ RX_RING(mac, i) = 0;
+
dma_free_coherent(&mac->dma_pdev->dev,
- RX_RING_SIZE * sizeof(struct pas_dma_xct_descr),
- mac->rx->desc, mac->rx->dma);
+ RX_RING_SIZE * sizeof(u64),
+ mac->rx->ring, mac->rx->dma);
dma_free_coherent(&mac->dma_pdev->dev, RX_RING_SIZE * sizeof(u64),
mac->rx->buffers, mac->rx->buf_dma);
- kfree(mac->rx->desc_info);
+ kfree(mac->rx->ring_info);
kfree(mac->rx);
mac->rx = NULL;
}
-static void pasemi_mac_replenish_rx_ring(struct net_device *dev)
+static void pasemi_mac_replenish_rx_ring(struct net_device *dev, int limit)
{
struct pasemi_mac *mac = netdev_priv(dev);
- unsigned int i;
- int start = mac->rx->next_to_fill;
- unsigned int limit, count;
-
- limit = (mac->rx->next_to_clean + RX_RING_SIZE -
- mac->rx->next_to_fill) & (RX_RING_SIZE - 1);
-
- /* Check to see if we're doing first-time setup */
- if (unlikely(mac->rx->next_to_clean == 0 && mac->rx->next_to_fill == 0))
- limit = RX_RING_SIZE;
+ int fill, count;
if (limit <= 0)
return;
- i = start;
- for (count = limit; count; count--) {
- struct pasemi_mac_buffer *info = &RX_DESC_INFO(mac, i);
- u64 *buff = &RX_BUFF(mac, i);
+ fill = mac->rx->next_to_fill;
+ for (count = 0; count < limit; count++) {
+ struct pasemi_mac_buffer *info = &RX_RING_INFO(mac, fill);
+ u64 *buff = &RX_BUFF(mac, fill);
struct sk_buff *skb;
dma_addr_t dma;
+ /* Entry in use? */
+ WARN_ON(*buff);
+
/* skb might still be in there for recycle on short receives */
if (info->skb)
skb = info->skb;
- else
+ else {
skb = dev_alloc_skb(BUF_SIZE);
+ skb_reserve(skb, LOCAL_SKB_ALIGN);
+ }
if (unlikely(!skb))
break;
- dma = pci_map_single(mac->dma_pdev, skb->data, skb->len,
+ dma = pci_map_single(mac->dma_pdev, skb->data,
+ BUF_SIZE - LOCAL_SKB_ALIGN,
PCI_DMA_FROMDEVICE);
if (unlikely(dma_mapping_error(dma))) {
@@ -378,19 +464,15 @@ static void pasemi_mac_replenish_rx_ring(struct net_device *dev)
info->skb = skb;
info->dma = dma;
*buff = XCT_RXB_LEN(BUF_SIZE) | XCT_RXB_ADDR(dma);
- i++;
+ fill++;
}
wmb();
- pci_write_config_dword(mac->dma_pdev,
- PAS_DMA_RXCHAN_INCR(mac->dma_rxch),
- limit - count);
- pci_write_config_dword(mac->dma_pdev,
- PAS_DMA_RXINT_INCR(mac->dma_if),
- limit - count);
+ write_dma_reg(mac, PAS_DMA_RXINT_INCR(mac->dma_if), count);
- mac->rx->next_to_fill += limit - count;
+ mac->rx->next_to_fill = (mac->rx->next_to_fill + count) &
+ (RX_RING_SIZE - 1);
}
static void pasemi_mac_restart_rx_intr(struct pasemi_mac *mac)
@@ -404,9 +486,7 @@ static void pasemi_mac_restart_rx_intr(struct pasemi_mac *mac)
reg = PAS_IOB_DMA_RXCH_RESET_PCNT(pcnt) | PAS_IOB_DMA_RXCH_RESET_PINTC;
- pci_write_config_dword(mac->iob_pdev,
- PAS_IOB_DMA_RXCH_RESET(mac->dma_rxch),
- reg);
+ write_iob_reg(mac, PAS_IOB_DMA_RXCH_RESET(mac->dma_rxch), reg);
}
static void pasemi_mac_restart_tx_intr(struct pasemi_mac *mac)
@@ -418,69 +498,96 @@ static void pasemi_mac_restart_tx_intr(struct pasemi_mac *mac)
reg = PAS_IOB_DMA_TXCH_RESET_PCNT(pcnt) | PAS_IOB_DMA_TXCH_RESET_PINTC;
- pci_write_config_dword(mac->iob_pdev,
- PAS_IOB_DMA_TXCH_RESET(mac->dma_txch), reg);
+ write_iob_reg(mac, PAS_IOB_DMA_TXCH_RESET(mac->dma_txch), reg);
}
+static inline void pasemi_mac_rx_error(struct pasemi_mac *mac, u64 macrx)
+{
+ unsigned int rcmdsta, ccmdsta;
+
+ if (!netif_msg_rx_err(mac))
+ return;
+
+ rcmdsta = read_dma_reg(mac, PAS_DMA_RXINT_RCMDSTA(mac->dma_if));
+ ccmdsta = read_dma_reg(mac, PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch));
+
+ printk(KERN_ERR "pasemi_mac: rx error. macrx %016lx, rx status %lx\n",
+ macrx, *mac->rx_status);
+
+ printk(KERN_ERR "pasemi_mac: rcmdsta %08x ccmdsta %08x\n",
+ rcmdsta, ccmdsta);
+}
+
+static inline void pasemi_mac_tx_error(struct pasemi_mac *mac, u64 mactx)
+{
+ unsigned int cmdsta;
+
+ if (!netif_msg_tx_err(mac))
+ return;
+
+ cmdsta = read_dma_reg(mac, PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch));
+
+ printk(KERN_ERR "pasemi_mac: tx error. mactx 0x%016lx, "\
+ "tx status 0x%016lx\n", mactx, *mac->tx_status);
+
+ printk(KERN_ERR "pasemi_mac: tcmdsta 0x%08x\n", cmdsta);
+}
+
static int pasemi_mac_clean_rx(struct pasemi_mac *mac, int limit)
{
unsigned int n;
int count;
- struct pas_dma_xct_descr *dp;
struct pasemi_mac_buffer *info;
struct sk_buff *skb;
- unsigned int i, len;
+ unsigned int len;
u64 macrx;
dma_addr_t dma;
+ int buf_index;
+ u64 eval;
spin_lock(&mac->rx->lock);
n = mac->rx->next_to_clean;
- for (count = limit; count; count--) {
+ prefetch(RX_RING(mac, n));
- rmb();
+ for (count = 0; count < limit; count++) {
+ macrx = RX_RING(mac, n);
- dp = &RX_DESC(mac, n);
- macrx = dp->macrx;
+ if ((macrx & XCT_MACRX_E) ||
+ (*mac->rx_status & PAS_STATUS_ERROR))
+ pasemi_mac_rx_error(mac, macrx);
if (!(macrx & XCT_MACRX_O))
break;
-
info = NULL;
- /* We have to scan for our skb since there's no way
- * to back-map them from the descriptor, and if we
- * have several receive channels then they might not
- * show up in the same order as they were put on the
- * interface ring.
- */
+ BUG_ON(!(macrx & XCT_MACRX_RR_8BRES));
- dma = (dp->ptr & XCT_PTR_ADDR_M);
- for (i = n; i < (n + RX_RING_SIZE); i++) {
- info = &RX_DESC_INFO(mac, i);
- if (info->dma == dma)
- break;
- }
+ eval = (RX_RING(mac, n+1) & XCT_RXRES_8B_EVAL_M) >>
+ XCT_RXRES_8B_EVAL_S;
+ buf_index = eval-1;
+
+ dma = (RX_RING(mac, n+2) & XCT_PTR_ADDR_M);
+ info = &RX_RING_INFO(mac, buf_index);
skb = info->skb;
- info->dma = 0;
- pci_unmap_single(mac->dma_pdev, dma, skb->len,
- PCI_DMA_FROMDEVICE);
+ prefetch(skb);
+ prefetch(&skb->data_len);
len = (macrx & XCT_MACRX_LLEN_M) >> XCT_MACRX_LLEN_S;
if (len < 256) {
- struct sk_buff *new_skb =
- netdev_alloc_skb(mac->netdev, len + NET_IP_ALIGN);
+ struct sk_buff *new_skb;
+
+ new_skb = netdev_alloc_skb(mac->netdev,
+ len + LOCAL_SKB_ALIGN);
if (new_skb) {
- skb_reserve(new_skb, NET_IP_ALIGN);
- memcpy(new_skb->data - NET_IP_ALIGN,
- skb->data - NET_IP_ALIGN,
- len + NET_IP_ALIGN);
+ skb_reserve(new_skb, LOCAL_SKB_ALIGN);
+ memcpy(new_skb->data, skb->data, len);
/* save the skb in buffer_info as good */
skb = new_skb;
}
@@ -488,73 +595,131 @@ static int pasemi_mac_clean_rx(struct pasemi_mac *mac, int limit)
} else
info->skb = NULL;
- skb_put(skb, len);
+ pci_unmap_single(mac->dma_pdev, dma, len, PCI_DMA_FROMDEVICE);
- skb->protocol = eth_type_trans(skb, mac->netdev);
+ info->dma = 0;
+
+ skb_put(skb, len);
- if ((macrx & XCT_MACRX_HTY_M) == XCT_MACRX_HTY_IPV4_OK) {
- skb->ip_summed = CHECKSUM_COMPLETE;
+ if (likely((macrx & XCT_MACRX_HTY_M) == XCT_MACRX_HTY_IPV4_OK)) {
+ skb->ip_summed = CHECKSUM_UNNECESSARY;
skb->csum = (macrx & XCT_MACRX_CSUM_M) >>
XCT_MACRX_CSUM_S;
} else
skb->ip_summed = CHECKSUM_NONE;
- mac->stats.rx_bytes += len;
- mac->stats.rx_packets++;
+ mac->netdev->stats.rx_bytes += len;
+ mac->netdev->stats.rx_packets++;
+ skb->protocol = eth_type_trans(skb, mac->netdev);
netif_receive_skb(skb);
- dp->ptr = 0;
- dp->macrx = 0;
+ RX_RING(mac, n) = 0;
+ RX_RING(mac, n+1) = 0;
+
+ /* Need to zero it out since hardware doesn't, since the
+ * replenish loop uses it to tell when it's done.
+ */
+ RX_BUFF(mac, buf_index) = 0;
+
+ n += 4;
+ }
- n++;
+ if (n > RX_RING_SIZE) {
+ /* Errata 5971 workaround: L2 target of headers */
+ write_iob_reg(mac, PAS_IOB_COM_PKTHDRCNT, 0);
+ n &= (RX_RING_SIZE-1);
}
- mac->rx->next_to_clean += limit - count;
- pasemi_mac_replenish_rx_ring(mac->netdev);
+ mac->rx->next_to_clean = n;
+
+ /* Increase is in number of 16-byte entries, and since each descriptor
+ * with an 8BRES takes up 3x8 bytes (padded to 4x8), increase with
+ * count*2.
+ */
+ write_dma_reg(mac, PAS_DMA_RXCHAN_INCR(mac->dma_rxch), count << 1);
+
+ pasemi_mac_replenish_rx_ring(mac->netdev, count);
spin_unlock(&mac->rx->lock);
return count;
}
+/* Can't make this too large or we blow the kernel stack limits */
+#define TX_CLEAN_BATCHSIZE (128/MAX_SKB_FRAGS)
+
static int pasemi_mac_clean_tx(struct pasemi_mac *mac)
{
- int i;
- struct pasemi_mac_buffer *info;
- struct pas_dma_xct_descr *dp;
- int start, count;
- int flags;
-
+ int i, j;
+ unsigned int start, descr_count, buf_count, batch_limit;
+ unsigned int ring_limit;
+ unsigned int total_count;
+ unsigned long flags;
+ struct sk_buff *skbs[TX_CLEAN_BATCHSIZE];
+ dma_addr_t dmas[TX_CLEAN_BATCHSIZE][MAX_SKB_FRAGS+1];
+
+ total_count = 0;
+ batch_limit = TX_CLEAN_BATCHSIZE;
+restart:
spin_lock_irqsave(&mac->tx->lock, flags);
start = mac->tx->next_to_clean;
- count = 0;
+ ring_limit = mac->tx->next_to_fill;
- for (i = start; i < mac->tx->next_to_use; i++) {
- dp = &TX_DESC(mac, i);
- if (!dp || (dp->mactx & XCT_MACTX_O))
+ /* Compensate for when fill has wrapped but clean has not */
+ if (start > ring_limit)
+ ring_limit += TX_RING_SIZE;
+
+ buf_count = 0;
+ descr_count = 0;
+
+ for (i = start;
+ descr_count < batch_limit && i < ring_limit;
+ i += buf_count) {
+ u64 mactx = TX_RING(mac, i);
+ struct sk_buff *skb;
+
+ if ((mactx & XCT_MACTX_E) ||
+ (*mac->tx_status & PAS_STATUS_ERROR))
+ pasemi_mac_tx_error(mac, mactx);
+
+ if (unlikely(mactx & XCT_MACTX_O))
+ /* Not yet transmitted */
break;
- count++;
+ skb = TX_RING_INFO(mac, i+1).skb;
+ skbs[descr_count] = skb;
- info = &TX_DESC_INFO(mac, i);
+ buf_count = 2 + skb_shinfo(skb)->nr_frags;
+ for (j = 0; j <= skb_shinfo(skb)->nr_frags; j++)
+ dmas[descr_count][j] = TX_RING_INFO(mac, i+1+j).dma;
- pci_unmap_single(mac->dma_pdev, info->dma,
- info->skb->len, PCI_DMA_TODEVICE);
- dev_kfree_skb_irq(info->skb);
+ TX_RING(mac, i) = 0;
+ TX_RING(mac, i+1) = 0;
- info->skb = NULL;
- info->dma = 0;
- dp->mactx = 0;
- dp->ptr = 0;
+ /* Since we always fill with an even number of entries, make
+ * sure we skip any unused one at the end as well.
+ */
+ if (buf_count & 1)
+ buf_count++;
+ descr_count++;
}
- mac->tx->next_to_clean += count;
- spin_unlock_irqrestore(&mac->tx->lock, flags);
+ mac->tx->next_to_clean = i & (TX_RING_SIZE-1);
+ spin_unlock_irqrestore(&mac->tx->lock, flags);
netif_wake_queue(mac->netdev);
- return count;
+ for (i = 0; i < descr_count; i++)
+ pasemi_mac_unmap_tx_skb(mac, skbs[i], dmas[i]);
+
+ total_count += descr_count;
+
+ /* If the batch was full, try to clean more */
+ if (descr_count == batch_limit)
+ goto restart;
+
+ return total_count;
}
@@ -567,15 +732,10 @@ static irqreturn_t pasemi_mac_rx_intr(int irq, void *data)
if (!(*mac->rx_status & PAS_STATUS_CAUSE_M))
return IRQ_NONE;
- if (*mac->rx_status & PAS_STATUS_ERROR)
- printk("rx_status reported error\n");
-
/* Don't reset packet count so it won't fire again but clear
* all others.
*/
- pci_read_config_dword(mac->dma_pdev, PAS_DMA_RXINT_RCMDSTA(mac->dma_if), &reg);
-
reg = 0;
if (*mac->rx_status & PAS_STATUS_SOFT)
reg |= PAS_IOB_DMA_RXCH_RESET_SINTC;
@@ -584,11 +744,9 @@ static irqreturn_t pasemi_mac_rx_intr(int irq, void *data)
if (*mac->rx_status & PAS_STATUS_TIMER)
reg |= PAS_IOB_DMA_RXCH_RESET_TINTC;
- netif_rx_schedule(dev);
-
- pci_write_config_dword(mac->iob_pdev,
- PAS_IOB_DMA_RXCH_RESET(mac->dma_rxch), reg);
+ netif_rx_schedule(dev, &mac->napi);
+ write_iob_reg(mac, PAS_IOB_DMA_RXCH_RESET(mac->dma_rxch), reg);
return IRQ_HANDLED;
}
@@ -613,9 +771,7 @@ static irqreturn_t pasemi_mac_tx_intr(int irq, void *data)
if (*mac->tx_status & PAS_STATUS_ERROR)
reg |= PAS_IOB_DMA_TXCH_RESET_DINTC;
- pci_write_config_dword(mac->iob_pdev,
- PAS_IOB_DMA_TXCH_RESET(mac->dma_txch),
- reg);
+ write_iob_reg(mac, PAS_IOB_DMA_TXCH_RESET(mac->dma_txch), reg);
return IRQ_HANDLED;
}
@@ -641,7 +797,7 @@ static void pasemi_adjust_link(struct net_device *dev)
} else
netif_carrier_on(dev);
- pci_read_config_dword(mac->pdev, PAS_MAC_CFG_PCFG, &flags);
+ flags = read_mac_reg(mac, PAS_MAC_CFG_PCFG);
new_flags = flags & ~(PAS_MAC_CFG_PCFG_HD | PAS_MAC_CFG_PCFG_SPD_M |
PAS_MAC_CFG_PCFG_TSR_M);
@@ -673,7 +829,7 @@ static void pasemi_adjust_link(struct net_device *dev)
mac->link = mac->phydev->link;
if (new_flags != flags)
- pci_write_config_dword(mac->pdev, PAS_MAC_CFG_PCFG, new_flags);
+ write_mac_reg(mac, PAS_MAC_CFG_PCFG, new_flags);
if (msg && netif_msg_link(mac))
printk(KERN_INFO "%s: Link is up at %d Mbps, %s duplex.\n",
@@ -736,39 +892,30 @@ static int pasemi_mac_open(struct net_device *dev)
int ret;
/* enable rx section */
- pci_write_config_dword(mac->dma_pdev, PAS_DMA_COM_RXCMD,
- PAS_DMA_COM_RXCMD_EN);
+ write_dma_reg(mac, PAS_DMA_COM_RXCMD, PAS_DMA_COM_RXCMD_EN);
/* enable tx section */
- pci_write_config_dword(mac->dma_pdev, PAS_DMA_COM_TXCMD,
- PAS_DMA_COM_TXCMD_EN);
+ write_dma_reg(mac, PAS_DMA_COM_TXCMD, PAS_DMA_COM_TXCMD_EN);
flags = PAS_MAC_CFG_TXP_FCE | PAS_MAC_CFG_TXP_FPC(3) |
PAS_MAC_CFG_TXP_SL(3) | PAS_MAC_CFG_TXP_COB(0xf) |
PAS_MAC_CFG_TXP_TIFT(8) | PAS_MAC_CFG_TXP_TIFG(12);
- pci_write_config_dword(mac->pdev, PAS_MAC_CFG_TXP, flags);
+ write_mac_reg(mac, PAS_MAC_CFG_TXP, flags);
- flags = PAS_MAC_CFG_PCFG_S1 | PAS_MAC_CFG_PCFG_PE |
- PAS_MAC_CFG_PCFG_PR | PAS_MAC_CFG_PCFG_CE;
-
- flags |= PAS_MAC_CFG_PCFG_TSR_1G | PAS_MAC_CFG_PCFG_SPD_1G;
-
- pci_write_config_dword(mac->iob_pdev, PAS_IOB_DMA_RXCH_CFG(mac->dma_rxch),
- PAS_IOB_DMA_RXCH_CFG_CNTTH(0));
+ write_iob_reg(mac, PAS_IOB_DMA_RXCH_CFG(mac->dma_rxch),
+ PAS_IOB_DMA_RXCH_CFG_CNTTH(0));
- pci_write_config_dword(mac->iob_pdev, PAS_IOB_DMA_TXCH_CFG(mac->dma_txch),
- PAS_IOB_DMA_TXCH_CFG_CNTTH(32));
+ write_iob_reg(mac, PAS_IOB_DMA_TXCH_CFG(mac->dma_txch),
+ PAS_IOB_DMA_TXCH_CFG_CNTTH(128));
/* Clear out any residual packet count state from firmware */
pasemi_mac_restart_rx_intr(mac);
pasemi_mac_restart_tx_intr(mac);
/* 0xffffff is max value, about 16ms */
- pci_write_config_dword(mac->iob_pdev, PAS_IOB_DMA_COM_TIMEOUTCFG,
- PAS_IOB_DMA_COM_TIMEOUTCFG_TCNT(0xffffff));
-
- pci_write_config_dword(mac->pdev, PAS_MAC_CFG_PCFG, flags);
+ write_iob_reg(mac, PAS_IOB_DMA_COM_TIMEOUTCFG,
+ PAS_IOB_DMA_COM_TIMEOUTCFG_TCNT(0xffffff));
ret = pasemi_mac_setup_rx_resources(dev);
if (ret)
@@ -778,27 +925,48 @@ static int pasemi_mac_open(struct net_device *dev)
if (ret)
goto out_tx_resources;
- pci_write_config_dword(mac->pdev, PAS_MAC_IPC_CHNL,
- PAS_MAC_IPC_CHNL_DCHNO(mac->dma_rxch) |
- PAS_MAC_IPC_CHNL_BCH(mac->dma_rxch));
+ write_mac_reg(mac, PAS_MAC_IPC_CHNL,
+ PAS_MAC_IPC_CHNL_DCHNO(mac->dma_rxch) |
+ PAS_MAC_IPC_CHNL_BCH(mac->dma_rxch));
/* enable rx if */
- pci_write_config_dword(mac->dma_pdev,
- PAS_DMA_RXINT_RCMDSTA(mac->dma_if),
- PAS_DMA_RXINT_RCMDSTA_EN);
+ write_dma_reg(mac, PAS_DMA_RXINT_RCMDSTA(mac->dma_if),
+ PAS_DMA_RXINT_RCMDSTA_EN |
+ PAS_DMA_RXINT_RCMDSTA_DROPS_M |
+ PAS_DMA_RXINT_RCMDSTA_BP |
+ PAS_DMA_RXINT_RCMDSTA_OO |
+ PAS_DMA_RXINT_RCMDSTA_BT);
/* enable rx channel */
- pci_write_config_dword(mac->dma_pdev,
- PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch),
- PAS_DMA_RXCHAN_CCMDSTA_EN |
- PAS_DMA_RXCHAN_CCMDSTA_DU);
+ write_dma_reg(mac, PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch),
+ PAS_DMA_RXCHAN_CCMDSTA_EN |
+ PAS_DMA_RXCHAN_CCMDSTA_DU |
+ PAS_DMA_RXCHAN_CCMDSTA_OD |
+ PAS_DMA_RXCHAN_CCMDSTA_FD |
+ PAS_DMA_RXCHAN_CCMDSTA_DT);
/* enable tx channel */
- pci_write_config_dword(mac->dma_pdev,
- PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch),
- PAS_DMA_TXCHAN_TCMDSTA_EN);
+ write_dma_reg(mac, PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch),
+ PAS_DMA_TXCHAN_TCMDSTA_EN |
+ PAS_DMA_TXCHAN_TCMDSTA_SZ |
+ PAS_DMA_TXCHAN_TCMDSTA_DB |
+ PAS_DMA_TXCHAN_TCMDSTA_DE |
+ PAS_DMA_TXCHAN_TCMDSTA_DA);
+
+ pasemi_mac_replenish_rx_ring(dev, RX_RING_SIZE);
+
+ write_dma_reg(mac, PAS_DMA_RXCHAN_INCR(mac->dma_rxch), RX_RING_SIZE>>1);
- pasemi_mac_replenish_rx_ring(dev);
+ flags = PAS_MAC_CFG_PCFG_S1 | PAS_MAC_CFG_PCFG_PE |
+ PAS_MAC_CFG_PCFG_PR | PAS_MAC_CFG_PCFG_CE;
+
+ if (mac->type == MAC_TYPE_GMAC)
+ flags |= PAS_MAC_CFG_PCFG_TSR_1G | PAS_MAC_CFG_PCFG_SPD_1G;
+ else
+ flags |= PAS_MAC_CFG_PCFG_TSR_10G | PAS_MAC_CFG_PCFG_SPD_10G;
+
+ /* Enable interface in MAC */
+ write_mac_reg(mac, PAS_MAC_CFG_PCFG, flags);
ret = pasemi_mac_phy_init(dev);
/* Some configs don't have PHYs (XAUI etc), so don't complain about
@@ -808,7 +976,7 @@ static int pasemi_mac_open(struct net_device *dev)
dev_warn(&mac->pdev->dev, "phy init failed: %d\n", ret);
netif_start_queue(dev);
- netif_poll_enable(dev);
+ napi_enable(&mac->napi);
/* Interrupts are a bit different for our DMA controller: While
* it's got one a regular PCI device header, the interrupt there
@@ -845,7 +1013,7 @@ static int pasemi_mac_open(struct net_device *dev)
out_rx_int:
free_irq(mac->tx_irq, dev);
out_tx_int:
- netif_poll_disable(dev);
+ napi_disable(&mac->napi);
netif_stop_queue(dev);
pasemi_mac_free_tx_resources(dev);
out_tx_resources:
@@ -860,7 +1028,7 @@ out_rx_resources:
static int pasemi_mac_close(struct net_device *dev)
{
struct pasemi_mac *mac = netdev_priv(dev);
- unsigned int stat;
+ unsigned int sta;
int retries;
if (mac->phydev) {
@@ -869,68 +1037,74 @@ static int pasemi_mac_close(struct net_device *dev)
}
netif_stop_queue(dev);
+ napi_disable(&mac->napi);
+
+ sta = read_dma_reg(mac, PAS_DMA_RXINT_RCMDSTA(mac->dma_if));
+ if (sta & (PAS_DMA_RXINT_RCMDSTA_BP |
+ PAS_DMA_RXINT_RCMDSTA_OO |
+ PAS_DMA_RXINT_RCMDSTA_BT))
+ printk(KERN_DEBUG "pasemi_mac: rcmdsta error: 0x%08x\n", sta);
+
+ sta = read_dma_reg(mac, PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch));
+ if (sta & (PAS_DMA_RXCHAN_CCMDSTA_DU |
+ PAS_DMA_RXCHAN_CCMDSTA_OD |
+ PAS_DMA_RXCHAN_CCMDSTA_FD |
+ PAS_DMA_RXCHAN_CCMDSTA_DT))
+ printk(KERN_DEBUG "pasemi_mac: ccmdsta error: 0x%08x\n", sta);
+
+ sta = read_dma_reg(mac, PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch));
+ if (sta & (PAS_DMA_TXCHAN_TCMDSTA_SZ |
+ PAS_DMA_TXCHAN_TCMDSTA_DB |
+ PAS_DMA_TXCHAN_TCMDSTA_DE |
+ PAS_DMA_TXCHAN_TCMDSTA_DA))
+ printk(KERN_DEBUG "pasemi_mac: tcmdsta error: 0x%08x\n", sta);
/* Clean out any pending buffers */
pasemi_mac_clean_tx(mac);
pasemi_mac_clean_rx(mac, RX_RING_SIZE);
/* Disable interface */
- pci_write_config_dword(mac->dma_pdev,
- PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch),
- PAS_DMA_TXCHAN_TCMDSTA_ST);
- pci_write_config_dword(mac->dma_pdev,
- PAS_DMA_RXINT_RCMDSTA(mac->dma_if),
- PAS_DMA_RXINT_RCMDSTA_ST);
- pci_write_config_dword(mac->dma_pdev,
- PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch),
- PAS_DMA_RXCHAN_CCMDSTA_ST);
+ write_dma_reg(mac, PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch), PAS_DMA_TXCHAN_TCMDSTA_ST);
+ write_dma_reg(mac, PAS_DMA_RXINT_RCMDSTA(mac->dma_if), PAS_DMA_RXINT_RCMDSTA_ST);
+ write_dma_reg(mac, PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch), PAS_DMA_RXCHAN_CCMDSTA_ST);
for (retries = 0; retries < MAX_RETRIES; retries++) {
- pci_read_config_dword(mac->dma_pdev,
- PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch),
- &stat);
- if (!(stat & PAS_DMA_TXCHAN_TCMDSTA_ACT))
+ sta = read_dma_reg(mac, PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch));
+ if (!(sta & PAS_DMA_TXCHAN_TCMDSTA_ACT))
break;
cond_resched();
}
- if (stat & PAS_DMA_TXCHAN_TCMDSTA_ACT)
+ if (sta & PAS_DMA_TXCHAN_TCMDSTA_ACT)
dev_err(&mac->dma_pdev->dev, "Failed to stop tx channel\n");
for (retries = 0; retries < MAX_RETRIES; retries++) {
- pci_read_config_dword(mac->dma_pdev,
- PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch),
- &stat);
- if (!(stat & PAS_DMA_RXCHAN_CCMDSTA_ACT))
+ sta = read_dma_reg(mac, PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch));
+ if (!(sta & PAS_DMA_RXCHAN_CCMDSTA_ACT))
break;
cond_resched();
}
- if (stat & PAS_DMA_RXCHAN_CCMDSTA_ACT)
+ if (sta & PAS_DMA_RXCHAN_CCMDSTA_ACT)
dev_err(&mac->dma_pdev->dev, "Failed to stop rx channel\n");
for (retries = 0; retries < MAX_RETRIES; retries++) {
- pci_read_config_dword(mac->dma_pdev,
- PAS_DMA_RXINT_RCMDSTA(mac->dma_if),
- &stat);
- if (!(stat & PAS_DMA_RXINT_RCMDSTA_ACT))
+ sta = read_dma_reg(mac, PAS_DMA_RXINT_RCMDSTA(mac->dma_if));
+ if (!(sta & PAS_DMA_RXINT_RCMDSTA_ACT))
break;
cond_resched();
}
- if (stat & PAS_DMA_RXINT_RCMDSTA_ACT)
+ if (sta & PAS_DMA_RXINT_RCMDSTA_ACT)
dev_err(&mac->dma_pdev->dev, "Failed to stop rx interface\n");
/* Then, disable the channel. This must be done separately from
* stopping, since you can't disable when active.
*/
- pci_write_config_dword(mac->dma_pdev,
- PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch), 0);
- pci_write_config_dword(mac->dma_pdev,
- PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch), 0);
- pci_write_config_dword(mac->dma_pdev,
- PAS_DMA_RXINT_RCMDSTA(mac->dma_if), 0);
+ write_dma_reg(mac, PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch), 0);
+ write_dma_reg(mac, PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch), 0);
+ write_dma_reg(mac, PAS_DMA_RXINT_RCMDSTA(mac->dma_if), 0);
free_irq(mac->tx_irq, dev);
free_irq(mac->rx_irq, dev);
@@ -946,11 +1120,11 @@ static int pasemi_mac_start_tx(struct sk_buff *skb, struct net_device *dev)
{
struct pasemi_mac *mac = netdev_priv(dev);
struct pasemi_mac_txring *txring;
- struct pasemi_mac_buffer *info;
- struct pas_dma_xct_descr *dp;
- u64 dflags;
- dma_addr_t map;
- int flags;
+ u64 dflags, mactx;
+ dma_addr_t map[MAX_SKB_FRAGS+1];
+ unsigned int map_size[MAX_SKB_FRAGS+1];
+ unsigned long flags;
+ int i, nfrags;
dflags = XCT_MACTX_O | XCT_MACTX_ST | XCT_MACTX_SS | XCT_MACTX_CRC_PAD;
@@ -971,71 +1145,87 @@ static int pasemi_mac_start_tx(struct sk_buff *skb, struct net_device *dev)
}
}
- map = pci_map_single(mac->dma_pdev, skb->data, skb->len, PCI_DMA_TODEVICE);
+ nfrags = skb_shinfo(skb)->nr_frags;
- if (dma_mapping_error(map))
- return NETDEV_TX_BUSY;
+ map[0] = pci_map_single(mac->dma_pdev, skb->data, skb_headlen(skb),
+ PCI_DMA_TODEVICE);
+ map_size[0] = skb_headlen(skb);
+ if (dma_mapping_error(map[0]))
+ goto out_err_nolock;
+
+ for (i = 0; i < nfrags; i++) {
+ skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
+
+ map[i+1] = pci_map_page(mac->dma_pdev, frag->page,
+ frag->page_offset, frag->size,
+ PCI_DMA_TODEVICE);
+ map_size[i+1] = frag->size;
+ if (dma_mapping_error(map[i+1])) {
+ nfrags = i;
+ goto out_err_nolock;
+ }
+ }
+
+ mactx = dflags | XCT_MACTX_LLEN(skb->len);
txring = mac->tx;
spin_lock_irqsave(&txring->lock, flags);
- if (txring->next_to_clean - txring->next_to_use == TX_RING_SIZE) {
- spin_unlock_irqrestore(&txring->lock, flags);
- pasemi_mac_clean_tx(mac);
- pasemi_mac_restart_tx_intr(mac);
- spin_lock_irqsave(&txring->lock, flags);
-
- if (txring->next_to_clean - txring->next_to_use ==
- TX_RING_SIZE) {
- /* Still no room -- stop the queue and wait for tx
- * intr when there's room.
- */
- netif_stop_queue(dev);
- goto out_err;
- }
+ /* Avoid stepping on the same cache line that the DMA controller
+ * is currently about to send, so leave at least 8 words available.
+ * Total free space needed is mactx + fragments + 8
+ */
+ if (RING_AVAIL(txring) < nfrags + 10) {
+ /* no room -- stop the queue and wait for tx intr */
+ netif_stop_queue(dev);
+ goto out_err;
}
+ TX_RING(mac, txring->next_to_fill) = mactx;
+ txring->next_to_fill++;
+ TX_RING_INFO(mac, txring->next_to_fill).skb = skb;
+ for (i = 0; i <= nfrags; i++) {
+ TX_RING(mac, txring->next_to_fill+i) =
+ XCT_PTR_LEN(map_size[i]) | XCT_PTR_ADDR(map[i]);
+ TX_RING_INFO(mac, txring->next_to_fill+i).dma = map[i];
+ }
- dp = &TX_DESC(mac, txring->next_to_use);
- info = &TX_DESC_INFO(mac, txring->next_to_use);
+ /* We have to add an even number of 8-byte entries to the ring
+ * even if the last one is unused. That means always an odd number
+ * of pointers + one mactx descriptor.
+ */
+ if (nfrags & 1)
+ nfrags++;
- dp->mactx = dflags | XCT_MACTX_LLEN(skb->len);
- dp->ptr = XCT_PTR_LEN(skb->len) | XCT_PTR_ADDR(map);
- info->dma = map;
- info->skb = skb;
+ txring->next_to_fill = (txring->next_to_fill + nfrags + 1) &
+ (TX_RING_SIZE-1);
- txring->next_to_use++;
- mac->stats.tx_packets++;
- mac->stats.tx_bytes += skb->len;
+ dev->stats.tx_packets++;
+ dev->stats.tx_bytes += skb->len;
spin_unlock_irqrestore(&txring->lock, flags);
- pci_write_config_dword(mac->dma_pdev,
- PAS_DMA_TXCHAN_INCR(mac->dma_txch), 1);
+ write_dma_reg(mac, PAS_DMA_TXCHAN_INCR(mac->dma_txch), (nfrags+2) >> 1);
return NETDEV_TX_OK;
out_err:
spin_unlock_irqrestore(&txring->lock, flags);
- pci_unmap_single(mac->dma_pdev, map, skb->len, PCI_DMA_TODEVICE);
- return NETDEV_TX_BUSY;
-}
+out_err_nolock:
+ while (nfrags--)
+ pci_unmap_single(mac->dma_pdev, map[nfrags], map_size[nfrags],
+ PCI_DMA_TODEVICE);
-static struct net_device_stats *pasemi_mac_get_stats(struct net_device *dev)
-{
- struct pasemi_mac *mac = netdev_priv(dev);
-
- return &mac->stats;
+ return NETDEV_TX_BUSY;
}
-
static void pasemi_mac_set_rx_mode(struct net_device *dev)
{
struct pasemi_mac *mac = netdev_priv(dev);
unsigned int flags;
- pci_read_config_dword(mac->pdev, PAS_MAC_CFG_PCFG, &flags);
+ flags = read_mac_reg(mac, PAS_MAC_CFG_PCFG);
/* Set promiscuous */
if (dev->flags & IFF_PROMISC)
@@ -1043,30 +1233,92 @@ static void pasemi_mac_set_rx_mode(struct net_device *dev)
else
flags &= ~PAS_MAC_CFG_PCFG_PR;
- pci_write_config_dword(mac->pdev, PAS_MAC_CFG_PCFG, flags);
+ write_mac_reg(mac, PAS_MAC_CFG_PCFG, flags);
}
-static int pasemi_mac_poll(struct net_device *dev, int *budget)
+static int pasemi_mac_poll(struct napi_struct *napi, int budget)
{
- int pkts, limit = min(*budget, dev->quota);
- struct pasemi_mac *mac = netdev_priv(dev);
-
- pkts = pasemi_mac_clean_rx(mac, limit);
-
- dev->quota -= pkts;
- *budget -= pkts;
+ struct pasemi_mac *mac = container_of(napi, struct pasemi_mac, napi);
+ struct net_device *dev = mac->netdev;
+ int pkts;
- if (pkts < limit) {
+ pasemi_mac_clean_tx(mac);
+ pkts = pasemi_mac_clean_rx(mac, budget);
+ if (pkts < budget) {
/* all done, no more packets present */
- netif_rx_complete(dev);
+ netif_rx_complete(dev, napi);
pasemi_mac_restart_rx_intr(mac);
- return 0;
- } else {
- /* used up our quantum, so reschedule */
- return 1;
}
+ return pkts;
+}
+
+static void __iomem * __devinit map_onedev(struct pci_dev *p, int index)
+{
+ struct device_node *dn;
+ void __iomem *ret;
+
+ dn = pci_device_to_OF_node(p);
+ if (!dn)
+ goto fallback;
+
+ ret = of_iomap(dn, index);
+ if (!ret)
+ goto fallback;
+
+ return ret;
+fallback:
+ /* This is hardcoded and ugly, but we have some firmware versions
+ * that don't provide the register space in the device tree. Luckily
+ * they are at well-known locations so we can just do the math here.
+ */
+ return ioremap(0xe0000000 + (p->devfn << 12), 0x2000);
+}
+
+static int __devinit pasemi_mac_map_regs(struct pasemi_mac *mac)
+{
+ struct resource res;
+ struct device_node *dn;
+ int err;
+
+ mac->dma_pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa007, NULL);
+ if (!mac->dma_pdev) {
+ dev_err(&mac->pdev->dev, "Can't find DMA Controller\n");
+ return -ENODEV;
+ }
+
+ mac->iob_pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa001, NULL);
+ if (!mac->iob_pdev) {
+ dev_err(&mac->pdev->dev, "Can't find I/O Bridge\n");
+ return -ENODEV;
+ }
+
+ mac->regs = map_onedev(mac->pdev, 0);
+ mac->dma_regs = map_onedev(mac->dma_pdev, 0);
+ mac->iob_regs = map_onedev(mac->iob_pdev, 0);
+
+ if (!mac->regs || !mac->dma_regs || !mac->iob_regs) {
+ dev_err(&mac->pdev->dev, "Can't map registers\n");
+ return -ENODEV;
+ }
+
+ /* The dma status structure is located in the I/O bridge, and
+ * is cache coherent.
+ */
+ if (!dma_status) {
+ dn = pci_device_to_OF_node(mac->iob_pdev);
+ if (dn)
+ err = of_address_to_resource(dn, 1, &res);
+ if (!dn || err) {
+ /* Fallback for old firmware */
+ res.start = 0xfd800000;
+ res.end = res.start + 0x1000;
+ }
+ dma_status = __ioremap(res.start, res.end-res.start, 0);
+ }
+
+ return 0;
}
static int __devinit
@@ -1076,6 +1328,7 @@ pasemi_mac_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
struct net_device *dev;
struct pasemi_mac *mac;
int err;
+ DECLARE_MAC_BUF(mac_buf);
err = pci_enable_device(pdev);
if (err)
@@ -1089,7 +1342,6 @@ pasemi_mac_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
goto out_disable_device;
}
- SET_MODULE_OWNER(dev);
pci_set_drvdata(pdev, dev);
SET_NETDEV_DEV(dev, &pdev->dev);
@@ -1097,21 +1349,10 @@ pasemi_mac_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
mac->pdev = pdev;
mac->netdev = dev;
- mac->dma_pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa007, NULL);
- if (!mac->dma_pdev) {
- dev_err(&pdev->dev, "Can't find DMA Controller\n");
- err = -ENODEV;
- goto out_free_netdev;
- }
+ netif_napi_add(dev, &mac->napi, pasemi_mac_poll, 64);
- mac->iob_pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa001, NULL);
-
- if (!mac->iob_pdev) {
- dev_err(&pdev->dev, "Can't find I/O Bridge\n");
- err = -ENODEV;
- goto out_put_dma_pdev;
- }
+ dev->features = NETIF_F_HW_CSUM | NETIF_F_LLTX | NETIF_F_SG;
/* These should come out of the device tree eventually */
mac->dma_txch = index;
@@ -1148,18 +1389,11 @@ pasemi_mac_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
dev->open = pasemi_mac_open;
dev->stop = pasemi_mac_close;
dev->hard_start_xmit = pasemi_mac_start_tx;
- dev->get_stats = pasemi_mac_get_stats;
dev->set_multicast_list = pasemi_mac_set_rx_mode;
- dev->weight = 64;
- dev->poll = pasemi_mac_poll;
- dev->features = NETIF_F_HW_CSUM;
- /* The dma status structure is located in the I/O bridge, and
- * is cache coherent.
- */
- if (!dma_status)
- /* XXXOJN This should come from the device tree */
- dma_status = __ioremap(0xfd800000, 0x1000, 0);
+ err = pasemi_mac_map_regs(mac);
+ if (err)
+ goto out;
mac->rx_status = &dma_status->rx_sta[mac->dma_rxch];
mac->tx_status = &dma_status->tx_sta[mac->dma_txch];
@@ -1175,21 +1409,27 @@ pasemi_mac_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
dev_err(&mac->pdev->dev, "register_netdev failed with error %d\n",
err);
goto out;
- } else
+ } else if netif_msg_probe(mac)
printk(KERN_INFO "%s: PA Semi %s: intf %d, txch %d, rxch %d, "
- "hw addr %02x:%02x:%02x:%02x:%02x:%02x\n",
+ "hw addr %s\n",
dev->name, mac->type == MAC_TYPE_GMAC ? "GMAC" : "XAUI",
mac->dma_if, mac->dma_txch, mac->dma_rxch,
- dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2],
- dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]);
+ print_mac(mac_buf, dev->dev_addr));
return err;
out:
- pci_dev_put(mac->iob_pdev);
-out_put_dma_pdev:
- pci_dev_put(mac->dma_pdev);
-out_free_netdev:
+ if (mac->iob_pdev)
+ pci_dev_put(mac->iob_pdev);
+ if (mac->dma_pdev)
+ pci_dev_put(mac->dma_pdev);
+ if (mac->dma_regs)
+ iounmap(mac->dma_regs);
+ if (mac->iob_regs)
+ iounmap(mac->iob_regs);
+ if (mac->regs)
+ iounmap(mac->regs);
+
free_netdev(dev);
out_disable_device:
pci_disable_device(pdev);
@@ -1213,6 +1453,10 @@ static void __devexit pasemi_mac_remove(struct pci_dev *pdev)
pci_dev_put(mac->dma_pdev);
pci_dev_put(mac->iob_pdev);
+ iounmap(mac->regs);
+ iounmap(mac->dma_regs);
+ iounmap(mac->iob_regs);
+
pci_set_drvdata(pdev, NULL);
free_netdev(netdev);
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-29 22:51:10 +0000