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Merge git://github.com/Jkirsher/net-next

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This commit is contained in:
David S. Miller 2011-09-20 14:34:54 -04:00
commit 59da45c4fe
3 changed files with 312 additions and 346 deletions
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113
drivers/net/ethernet/intel/igb/igb.h
View file

@ -63,8 +63,7 @@ struct igb_adapter;
/* Transmit and receive queues */
#define IGB_MAX_RX_QUEUES (adapter->vfs_allocated_count ? 2 : \
(hw->mac.type > e1000_82575 ? 8 : 4))
#define IGB_ABS_MAX_TX_QUEUES 8
#define IGB_MAX_TX_QUEUES IGB_MAX_RX_QUEUES
#define IGB_MAX_TX_QUEUES 16
#define IGB_MAX_VF_MC_ENTRIES 30
#define IGB_MAX_VF_FUNCTIONS 8
@ -100,9 +99,10 @@ struct vf_data_storage {
*/
#define IGB_RX_PTHRESH 8
#define IGB_RX_HTHRESH 8
#define IGB_RX_WTHRESH 1
#define IGB_TX_PTHRESH 8
#define IGB_TX_HTHRESH 1
#define IGB_RX_WTHRESH ((hw->mac.type == e1000_82576 && \
adapter->msix_entries) ? 1 : 4)
#define IGB_TX_WTHRESH ((hw->mac.type == e1000_82576 && \
adapter->msix_entries) ? 1 : 16)
@ -110,13 +110,9 @@ struct vf_data_storage {
#define MAXIMUM_ETHERNET_VLAN_SIZE 1522
/* Supported Rx Buffer Sizes */
#define IGB_RXBUFFER_64 64 /* Used for packet split */
#define IGB_RXBUFFER_128 128 /* Used for packet split */
#define IGB_RXBUFFER_1024 1024
#define IGB_RXBUFFER_2048 2048
#define IGB_RXBUFFER_512 512
#define IGB_RXBUFFER_16384 16384
#define MAX_STD_JUMBO_FRAME_SIZE 9234
#define IGB_RX_HDR_LEN IGB_RXBUFFER_512
/* How many Tx Descriptors do we need to call netif_wake_queue ? */
#define IGB_TX_QUEUE_WAKE 16
@ -193,23 +189,23 @@ struct igb_ring {
struct igb_q_vector *q_vector; /* backlink to q_vector */
struct net_device *netdev; /* back pointer to net_device */
struct device *dev; /* device pointer for dma mapping */
dma_addr_t dma; /* phys address of the ring */
void *desc; /* descriptor ring memory */
unsigned int size; /* length of desc. ring in bytes */
u16 count; /* number of desc. in the ring */
u16 next_to_use;
u16 next_to_clean;
u8 queue_index;
u8 reg_idx;
void __iomem *head;
void __iomem *tail;
struct igb_buffer *buffer_info; /* array of buffer info structs */
void *desc; /* descriptor ring memory */
unsigned long flags; /* ring specific flags */
void __iomem *tail; /* pointer to ring tail register */
u16 count; /* number of desc. in the ring */
u8 queue_index; /* logical index of the ring*/
u8 reg_idx; /* physical index of the ring */
u32 size; /* length of desc. ring in bytes */
/* everything past this point are written often */
u16 next_to_clean ____cacheline_aligned_in_smp;
u16 next_to_use;
unsigned int total_bytes;
unsigned int total_packets;
u32 flags;
union {
/* TX */
struct {
@ -222,9 +218,10 @@ struct igb_ring {
struct {
struct igb_rx_queue_stats rx_stats;
struct u64_stats_sync rx_syncp;
u32 rx_buffer_len;
};
};
/* Items past this point are only used during ring alloc / free */
dma_addr_t dma; /* phys address of the ring */
};
#define IGB_RING_FLAG_RX_CSUM 0x00000001 /* RX CSUM enabled */
@ -234,12 +231,12 @@ struct igb_ring {
#define IGB_ADVTXD_DCMD (E1000_TXD_CMD_EOP | E1000_TXD_CMD_RS)
#define E1000_RX_DESC_ADV(R, i) \
(&(((union e1000_adv_rx_desc *)((R).desc))[i]))
#define E1000_TX_DESC_ADV(R, i) \
(&(((union e1000_adv_tx_desc *)((R).desc))[i]))
#define E1000_TX_CTXTDESC_ADV(R, i) \
(&(((struct e1000_adv_tx_context_desc *)((R).desc))[i]))
#define IGB_RX_DESC(R, i) \
(&(((union e1000_adv_rx_desc *)((R)->desc))[i]))
#define IGB_TX_DESC(R, i) \
(&(((union e1000_adv_tx_desc *)((R)->desc))[i]))
#define IGB_TX_CTXTDESC(R, i) \
(&(((struct e1000_adv_tx_context_desc *)((R)->desc))[i]))
/* igb_desc_unused - calculate if we have unused descriptors */
static inline int igb_desc_unused(struct igb_ring *ring)
@ -252,15 +249,15 @@ static inline int igb_desc_unused(struct igb_ring *ring)
/* board specific private data structure */
struct igb_adapter {
struct timer_list watchdog_timer;
struct timer_list phy_info_timer;
unsigned long active_vlans[BITS_TO_LONGS(VLAN_N_VID)];
u16 mng_vlan_id;
u32 bd_number;
u32 wol;
u32 en_mng_pt;
u16 link_speed;
u16 link_duplex;
struct net_device *netdev;
unsigned long state;
unsigned int flags;
unsigned int num_q_vectors;
struct msix_entry *msix_entries;
/* Interrupt Throttle Rate */
u32 rx_itr_setting;
@ -268,6 +265,28 @@ struct igb_adapter {
u16 tx_itr;
u16 rx_itr;
/* TX */
u32 tx_timeout_count;
int num_tx_queues;
struct igb_ring *tx_ring[16];
/* RX */
int num_rx_queues;
struct igb_ring *rx_ring[16];
u32 max_frame_size;
u32 min_frame_size;
struct timer_list watchdog_timer;
struct timer_list phy_info_timer;
u16 mng_vlan_id;
u32 bd_number;
u32 wol;
u32 en_mng_pt;
u16 link_speed;
u16 link_duplex;
struct work_struct reset_task;
struct work_struct watchdog_task;
bool fc_autoneg;
@ -275,20 +294,7 @@ struct igb_adapter {
struct timer_list blink_timer;
unsigned long led_status;
/* TX */
struct igb_ring *tx_ring[16];
u32 tx_timeout_count;
/* RX */
struct igb_ring *rx_ring[16];
int num_tx_queues;
int num_rx_queues;
u32 max_frame_size;
u32 min_frame_size;
/* OS defined structs */
struct net_device *netdev;
struct pci_dev *pdev;
struct cyclecounter cycles;
struct timecounter clock;
@ -310,18 +316,13 @@ struct igb_adapter {
int msg_enable;
unsigned int num_q_vectors;
struct igb_q_vector *q_vector[MAX_Q_VECTORS];
struct msix_entry *msix_entries;
u32 eims_enable_mask;
u32 eims_other;
/* to not mess up cache alignment, always add to the bottom */
unsigned long state;
unsigned int flags;
u32 eeprom_wol;
struct igb_ring *multi_tx_table[IGB_ABS_MAX_TX_QUEUES];
u16 tx_ring_count;
u16 rx_ring_count;
unsigned int vfs_allocated_count;
@ -371,10 +372,10 @@ extern void igb_configure_tx_ring(struct igb_adapter *, struct igb_ring *);
extern void igb_configure_rx_ring(struct igb_adapter *, struct igb_ring *);
extern void igb_setup_tctl(struct igb_adapter *);
extern void igb_setup_rctl(struct igb_adapter *);
extern netdev_tx_t igb_xmit_frame_ring_adv(struct sk_buff *, struct igb_ring *);
extern netdev_tx_t igb_xmit_frame_ring(struct sk_buff *, struct igb_ring *);
extern void igb_unmap_and_free_tx_resource(struct igb_ring *,
struct igb_buffer *);
extern void igb_alloc_rx_buffers_adv(struct igb_ring *, int);
extern void igb_alloc_rx_buffers(struct igb_ring *, u16);
extern void igb_update_stats(struct igb_adapter *, struct rtnl_link_stats64 *);
extern bool igb_has_link(struct igb_adapter *adapter);
extern void igb_set_ethtool_ops(struct net_device *);

15
drivers/net/ethernet/intel/igb/igb_ethtool.c
View file

@ -1368,7 +1368,6 @@ static int igb_setup_desc_rings(struct igb_adapter *adapter)
rx_ring->count = IGB_DEFAULT_RXD;
rx_ring->dev = &adapter->pdev->dev;
rx_ring->netdev = adapter->netdev;
rx_ring->rx_buffer_len = IGB_RXBUFFER_2048;
rx_ring->reg_idx = adapter->vfs_allocated_count;
if (igb_setup_rx_resources(rx_ring)) {
@ -1383,7 +1382,7 @@ static int igb_setup_desc_rings(struct igb_adapter *adapter)
igb_setup_rctl(adapter);
igb_configure_rx_ring(adapter, rx_ring);
igb_alloc_rx_buffers_adv(rx_ring, igb_desc_unused(rx_ring));
igb_alloc_rx_buffers(rx_ring, igb_desc_unused(rx_ring));
return 0;
@ -1587,7 +1586,7 @@ static int igb_clean_test_rings(struct igb_ring *rx_ring,
/* initialize next to clean and descriptor values */
rx_ntc = rx_ring->next_to_clean;
tx_ntc = tx_ring->next_to_clean;
rx_desc = E1000_RX_DESC_ADV(*rx_ring, rx_ntc);
rx_desc = IGB_RX_DESC(rx_ring, rx_ntc);
staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
while (staterr & E1000_RXD_STAT_DD) {
@ -1597,7 +1596,7 @@ static int igb_clean_test_rings(struct igb_ring *rx_ring,
/* unmap rx buffer, will be remapped by alloc_rx_buffers */
dma_unmap_single(rx_ring->dev,
buffer_info->dma,
rx_ring->rx_buffer_len,
IGB_RX_HDR_LEN,
DMA_FROM_DEVICE);
buffer_info->dma = 0;
@ -1618,12 +1617,12 @@ static int igb_clean_test_rings(struct igb_ring *rx_ring,
tx_ntc = 0;
/* fetch next descriptor */
rx_desc = E1000_RX_DESC_ADV(*rx_ring, rx_ntc);
rx_desc = IGB_RX_DESC(rx_ring, rx_ntc);
staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
}
/* re-map buffers to ring, store next to clean values */
igb_alloc_rx_buffers_adv(rx_ring, count);
igb_alloc_rx_buffers(rx_ring, count);
rx_ring->next_to_clean = rx_ntc;
tx_ring->next_to_clean = tx_ntc;
@ -1635,7 +1634,7 @@ static int igb_run_loopback_test(struct igb_adapter *adapter)
struct igb_ring *tx_ring = &adapter->test_tx_ring;
struct igb_ring *rx_ring = &adapter->test_rx_ring;
int i, j, lc, good_cnt, ret_val = 0;
unsigned int size = 1024;
unsigned int size = IGB_RX_HDR_LEN;
netdev_tx_t tx_ret_val;
struct sk_buff *skb;
@ -1666,7 +1665,7 @@ static int igb_run_loopback_test(struct igb_adapter *adapter)
/* place 64 packets on the transmit queue*/
for (i = 0; i < 64; i++) {
skb_get(skb);
tx_ret_val = igb_xmit_frame_ring_adv(skb, tx_ring);
tx_ret_val = igb_xmit_frame_ring(skb, tx_ring);
if (tx_ret_val == NETDEV_TX_OK)
good_cnt++;
}

486
drivers/net/ethernet/intel/igb/igb_main.c
View file

@ -122,7 +122,7 @@ static void igb_set_rx_mode(struct net_device *);
static void igb_update_phy_info(unsigned long);
static void igb_watchdog(unsigned long);
static void igb_watchdog_task(struct work_struct *);
static netdev_tx_t igb_xmit_frame_adv(struct sk_buff *skb, struct net_device *);
static netdev_tx_t igb_xmit_frame(struct sk_buff *skb, struct net_device *);
static struct rtnl_link_stats64 *igb_get_stats64(struct net_device *dev,
struct rtnl_link_stats64 *stats);
static int igb_change_mtu(struct net_device *, int);
@ -138,7 +138,7 @@ static void igb_setup_dca(struct igb_adapter *);
#endif /* CONFIG_IGB_DCA */
static bool igb_clean_tx_irq(struct igb_q_vector *);
static int igb_poll(struct napi_struct *, int);
static bool igb_clean_rx_irq_adv(struct igb_q_vector *, int *, int);
static bool igb_clean_rx_irq(struct igb_q_vector *, int);
static int igb_ioctl(struct net_device *, struct ifreq *, int cmd);
static void igb_tx_timeout(struct net_device *);
static void igb_reset_task(struct work_struct *);
@ -413,7 +413,7 @@ static void igb_dump(struct igb_adapter *adapter)
"leng ntw timestamp bi->skb\n");
for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) {
tx_desc = E1000_TX_DESC_ADV(*tx_ring, i);
tx_desc = IGB_TX_DESC(tx_ring, i);
buffer_info = &tx_ring->buffer_info[i];
u0 = (struct my_u0 *)tx_desc;
printk(KERN_INFO "T [0x%03X] %016llX %016llX %016llX"
@ -494,7 +494,7 @@ rx_ring_summary:
for (i = 0; i < rx_ring->count; i++) {
buffer_info = &rx_ring->buffer_info[i];
rx_desc = E1000_RX_DESC_ADV(*rx_ring, i);
rx_desc = IGB_RX_DESC(rx_ring, i);
u0 = (struct my_u0 *)rx_desc;
staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
if (staterr & E1000_RXD_STAT_DD) {
@ -517,9 +517,7 @@ rx_ring_summary:
DUMP_PREFIX_ADDRESS,
16, 1,
phys_to_virt(buffer_info->dma),
rx_ring->rx_buffer_len, true);
if (rx_ring->rx_buffer_len
< IGB_RXBUFFER_1024)
IGB_RX_HDR_LEN, true);
print_hex_dump(KERN_INFO, "",
DUMP_PREFIX_ADDRESS,
16, 1,
@ -707,7 +705,6 @@ static int igb_alloc_queues(struct igb_adapter *adapter)
ring->queue_index = i;
ring->dev = &adapter->pdev->dev;
ring->netdev = adapter->netdev;
ring->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
ring->flags = IGB_RING_FLAG_RX_CSUM; /* enable rx checksum */
/* set flag indicating ring supports SCTP checksum offload */
if (adapter->hw.mac.type >= e1000_82576)
@ -1439,7 +1436,7 @@ static void igb_configure(struct igb_adapter *adapter)
* next_to_use != next_to_clean */
for (i = 0; i < adapter->num_rx_queues; i++) {
struct igb_ring *ring = adapter->rx_ring[i];
igb_alloc_rx_buffers_adv(ring, igb_desc_unused(ring));
igb_alloc_rx_buffers(ring, igb_desc_unused(ring));
}
}
@ -1787,7 +1784,7 @@ static int igb_set_features(struct net_device *netdev, u32 features)
static const struct net_device_ops igb_netdev_ops = {
.ndo_open = igb_open,
.ndo_stop = igb_close,
.ndo_start_xmit = igb_xmit_frame_adv,
.ndo_start_xmit = igb_xmit_frame,
.ndo_get_stats64 = igb_get_stats64,
.ndo_set_rx_mode = igb_set_rx_mode,
.ndo_set_mac_address = igb_set_mac,
@ -1878,7 +1875,7 @@ static int __devinit igb_probe(struct pci_dev *pdev,
err = -ENOMEM;
netdev = alloc_etherdev_mq(sizeof(struct igb_adapter),
IGB_ABS_MAX_TX_QUEUES);
IGB_MAX_TX_QUEUES);
if (!netdev)
goto err_alloc_etherdev;
@ -2396,7 +2393,8 @@ static int __devinit igb_sw_init(struct igb_adapter *adapter)
adapter->rx_itr_setting = IGB_DEFAULT_ITR;
adapter->tx_itr_setting = IGB_DEFAULT_ITR;
adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN +
VLAN_HLEN;
adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN;
spin_lock_init(&adapter->stats64_lock);
@ -2622,10 +2620,6 @@ static int igb_setup_all_tx_resources(struct igb_adapter *adapter)
}
}
for (i = 0; i < IGB_ABS_MAX_TX_QUEUES; i++) {
int r_idx = i % adapter->num_tx_queues;
adapter->multi_tx_table[i] = adapter->tx_ring[r_idx];
}
return err;
}
@ -2666,14 +2660,12 @@ void igb_configure_tx_ring(struct igb_adapter *adapter,
struct igb_ring *ring)
{
struct e1000_hw *hw = &adapter->hw;
u32 txdctl;
u32 txdctl = 0;
u64 tdba = ring->dma;
int reg_idx = ring->reg_idx;
/* disable the queue */
txdctl = rd32(E1000_TXDCTL(reg_idx));
wr32(E1000_TXDCTL(reg_idx),
txdctl & ~E1000_TXDCTL_QUEUE_ENABLE);
wr32(E1000_TXDCTL(reg_idx), 0);
wrfl();
mdelay(10);
@ -2683,9 +2675,8 @@ void igb_configure_tx_ring(struct igb_adapter *adapter,
tdba & 0x00000000ffffffffULL);
wr32(E1000_TDBAH(reg_idx), tdba >> 32);
ring->head = hw->hw_addr + E1000_TDH(reg_idx);
ring->tail = hw->hw_addr + E1000_TDT(reg_idx);
writel(0, ring->head);
wr32(E1000_TDH(reg_idx), 0);
writel(0, ring->tail);
txdctl |= IGB_TX_PTHRESH;
@ -2964,16 +2955,19 @@ static inline int igb_set_vf_rlpml(struct igb_adapter *adapter, int size,
**/
static void igb_rlpml_set(struct igb_adapter *adapter)
{
u32 max_frame_size;
u32 max_frame_size = adapter->max_frame_size;
struct e1000_hw *hw = &adapter->hw;
u16 pf_id = adapter->vfs_allocated_count;
max_frame_size = adapter->max_frame_size + VLAN_TAG_SIZE;
/* if vfs are enabled we set RLPML to the largest possible request
* size and set the VMOLR RLPML to the size we need */
if (pf_id) {
igb_set_vf_rlpml(adapter, max_frame_size, pf_id);
/*
* If we're in VMDQ or SR-IOV mode, then set global RLPML
* to our max jumbo frame size, in case we need to enable
* jumbo frames on one of the rings later.
* This will not pass over-length frames into the default
* queue because it's gated by the VMOLR.RLPML.
*/
max_frame_size = MAX_JUMBO_FRAME_SIZE;
}
@ -3028,12 +3022,10 @@ void igb_configure_rx_ring(struct igb_adapter *adapter,
struct e1000_hw *hw = &adapter->hw;
u64 rdba = ring->dma;
int reg_idx = ring->reg_idx;
u32 srrctl, rxdctl;
u32 srrctl = 0, rxdctl = 0;
/* disable the queue */
rxdctl = rd32(E1000_RXDCTL(reg_idx));
wr32(E1000_RXDCTL(reg_idx),
rxdctl & ~E1000_RXDCTL_QUEUE_ENABLE);
wr32(E1000_RXDCTL(reg_idx), 0);
/* Set DMA base address registers */
wr32(E1000_RDBAL(reg_idx),
@ -3043,28 +3035,18 @@ void igb_configure_rx_ring(struct igb_adapter *adapter,
ring->count * sizeof(union e1000_adv_rx_desc));
/* initialize head and tail */
ring->head = hw->hw_addr + E1000_RDH(reg_idx);
ring->tail = hw->hw_addr + E1000_RDT(reg_idx);
writel(0, ring->head);
wr32(E1000_RDH(reg_idx), 0);
writel(0, ring->tail);
/* set descriptor configuration */
if (ring->rx_buffer_len < IGB_RXBUFFER_1024) {
srrctl = ALIGN(ring->rx_buffer_len, 64) <<
E1000_SRRCTL_BSIZEHDRSIZE_SHIFT;
srrctl = IGB_RX_HDR_LEN << E1000_SRRCTL_BSIZEHDRSIZE_SHIFT;
#if (PAGE_SIZE / 2) > IGB_RXBUFFER_16384
srrctl |= IGB_RXBUFFER_16384 >>
E1000_SRRCTL_BSIZEPKT_SHIFT;
srrctl |= IGB_RXBUFFER_16384 >> E1000_SRRCTL_BSIZEPKT_SHIFT;
#else
srrctl |= (PAGE_SIZE / 2) >>
E1000_SRRCTL_BSIZEPKT_SHIFT;
srrctl |= (PAGE_SIZE / 2) >> E1000_SRRCTL_BSIZEPKT_SHIFT;
#endif
srrctl |= E1000_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS;
} else {
srrctl = ALIGN(ring->rx_buffer_len, 1024) >>
E1000_SRRCTL_BSIZEPKT_SHIFT;
srrctl |= E1000_SRRCTL_DESCTYPE_ADV_ONEBUF;
}
if (hw->mac.type == e1000_82580)
srrctl |= E1000_SRRCTL_TIMESTAMP;
/* Only set Drop Enable if we are supporting multiple queues */
@ -3076,13 +3058,12 @@ void igb_configure_rx_ring(struct igb_adapter *adapter,
/* set filtering for VMDQ pools */
igb_set_vmolr(adapter, reg_idx & 0x7, true);
/* enable receive descriptor fetching */
rxdctl = rd32(E1000_RXDCTL(reg_idx));
rxdctl |= E1000_RXDCTL_QUEUE_ENABLE;
rxdctl &= 0xFFF00000;
rxdctl |= IGB_RX_PTHRESH;
rxdctl |= IGB_RX_HTHRESH << 8;
rxdctl |= IGB_RX_WTHRESH << 16;
/* enable receive descriptor fetching */
rxdctl |= E1000_RXDCTL_QUEUE_ENABLE;
wr32(E1000_RXDCTL(reg_idx), rxdctl);
}
@ -3256,20 +3237,19 @@ static void igb_free_all_rx_resources(struct igb_adapter *adapter)
**/
static void igb_clean_rx_ring(struct igb_ring *rx_ring)
{
struct igb_buffer *buffer_info;
unsigned long size;
unsigned int i;
u16 i;
if (!rx_ring->buffer_info)
return;
/* Free all the Rx ring sk_buffs */
for (i = 0; i < rx_ring->count; i++) {
buffer_info = &rx_ring->buffer_info[i];
struct igb_buffer *buffer_info = &rx_ring->buffer_info[i];
if (buffer_info->dma) {
dma_unmap_single(rx_ring->dev,
buffer_info->dma,
rx_ring->rx_buffer_len,
IGB_RX_HDR_LEN,
DMA_FROM_DEVICE);
buffer_info->dma = 0;
}
@ -3971,7 +3951,7 @@ set_itr_now:
#define IGB_TX_FLAGS_VLAN_MASK 0xffff0000
#define IGB_TX_FLAGS_VLAN_SHIFT 16
static inline int igb_tso_adv(struct igb_ring *tx_ring,
static inline int igb_tso(struct igb_ring *tx_ring,
struct sk_buff *skb, u32 tx_flags, u8 *hdr_len)
{
struct e1000_adv_tx_context_desc *context_desc;
@ -4009,7 +3989,7 @@ static inline int igb_tso_adv(struct igb_ring *tx_ring,
i = tx_ring->next_to_use;
buffer_info = &tx_ring->buffer_info[i];
context_desc = E1000_TX_CTXTDESC_ADV(*tx_ring, i);
context_desc = IGB_TX_CTXTDESC(tx_ring, i);
/* VLAN MACLEN IPLEN */
if (tx_flags & IGB_TX_FLAGS_VLAN)
info |= (tx_flags & IGB_TX_FLAGS_VLAN_MASK);
@ -4051,7 +4031,7 @@ static inline int igb_tso_adv(struct igb_ring *tx_ring,
return true;
}
static inline bool igb_tx_csum_adv(struct igb_ring *tx_ring,
static inline bool igb_tx_csum(struct igb_ring *tx_ring,
struct sk_buff *skb, u32 tx_flags)
{
struct e1000_adv_tx_context_desc *context_desc;
@ -4064,7 +4044,7 @@ static inline bool igb_tx_csum_adv(struct igb_ring *tx_ring,
(tx_flags & IGB_TX_FLAGS_VLAN)) {
i = tx_ring->next_to_use;
buffer_info = &tx_ring->buffer_info[i];
context_desc = E1000_TX_CTXTDESC_ADV(*tx_ring, i);
context_desc = IGB_TX_CTXTDESC(tx_ring, i);
if (tx_flags & IGB_TX_FLAGS_VLAN)
info |= (tx_flags & IGB_TX_FLAGS_VLAN_MASK);
@ -4136,7 +4116,7 @@ static inline bool igb_tx_csum_adv(struct igb_ring *tx_ring,
#define IGB_MAX_TXD_PWR 16
#define IGB_MAX_DATA_PER_TXD (1<<IGB_MAX_TXD_PWR)
static inline int igb_tx_map_adv(struct igb_ring *tx_ring, struct sk_buff *skb,
static inline int igb_tx_map(struct igb_ring *tx_ring, struct sk_buff *skb,
unsigned int first)
{
struct igb_buffer *buffer_info;
@ -4212,7 +4192,7 @@ dma_error:
return 0;
}
static inline void igb_tx_queue_adv(struct igb_ring *tx_ring,
static inline void igb_tx_queue(struct igb_ring *tx_ring,
u32 tx_flags, int count, u32 paylen,
u8 hdr_len)
{
@ -4254,7 +4234,7 @@ static inline void igb_tx_queue_adv(struct igb_ring *tx_ring,
do {
buffer_info = &tx_ring->buffer_info[i];
tx_desc = E1000_TX_DESC_ADV(*tx_ring, i);
tx_desc = IGB_TX_DESC(tx_ring, i);
tx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma);
tx_desc->read.cmd_type_len =
cpu_to_le32(cmd_type_len | buffer_info->length);
@ -4312,7 +4292,7 @@ static inline int igb_maybe_stop_tx(struct igb_ring *tx_ring, int size)
return __igb_maybe_stop_tx(tx_ring, size);
}
netdev_tx_t igb_xmit_frame_ring_adv(struct sk_buff *skb,
netdev_tx_t igb_xmit_frame_ring(struct sk_buff *skb,
struct igb_ring *tx_ring)
{
int tso = 0, count;
@ -4345,7 +4325,7 @@ netdev_tx_t igb_xmit_frame_ring_adv(struct sk_buff *skb,
first = tx_ring->next_to_use;
if (skb_is_gso(skb)) {
tso = igb_tso_adv(tx_ring, skb, tx_flags, &hdr_len);
tso = igb_tso(tx_ring, skb, tx_flags, &hdr_len);
if (tso < 0) {
dev_kfree_skb_any(skb);
@ -4355,7 +4335,7 @@ netdev_tx_t igb_xmit_frame_ring_adv(struct sk_buff *skb,
if (tso)
tx_flags |= IGB_TX_FLAGS_TSO;
else if (igb_tx_csum_adv(tx_ring, skb, tx_flags) &&
else if (igb_tx_csum(tx_ring, skb, tx_flags) &&
(skb->ip_summed == CHECKSUM_PARTIAL))
tx_flags |= IGB_TX_FLAGS_CSUM;
@ -4363,7 +4343,7 @@ netdev_tx_t igb_xmit_frame_ring_adv(struct sk_buff *skb,
* count reflects descriptors mapped, if 0 or less then mapping error
* has occurred and we need to rewind the descriptor queue
*/
count = igb_tx_map_adv(tx_ring, skb, first);
count = igb_tx_map(tx_ring, skb, first);
if (!count) {
dev_kfree_skb_any(skb);
tx_ring->buffer_info[first].time_stamp = 0;
@ -4371,7 +4351,7 @@ netdev_tx_t igb_xmit_frame_ring_adv(struct sk_buff *skb,
return NETDEV_TX_OK;
}
igb_tx_queue_adv(tx_ring, tx_flags, count, skb->len, hdr_len);
igb_tx_queue(tx_ring, tx_flags, count, skb->len, hdr_len);
/* Make sure there is space in the ring for the next send. */
igb_maybe_stop_tx(tx_ring, MAX_SKB_FRAGS + 4);
@ -4379,12 +4359,21 @@ netdev_tx_t igb_xmit_frame_ring_adv(struct sk_buff *skb,
return NETDEV_TX_OK;
}
static netdev_tx_t igb_xmit_frame_adv(struct sk_buff *skb,
static inline struct igb_ring *igb_tx_queue_mapping(struct igb_adapter *adapter,
struct sk_buff *skb)
{
unsigned int r_idx = skb->queue_mapping;
if (r_idx >= adapter->num_tx_queues)
r_idx = r_idx % adapter->num_tx_queues;
return adapter->tx_ring[r_idx];
}
static netdev_tx_t igb_xmit_frame(struct sk_buff *skb,
struct net_device *netdev)
{
struct igb_adapter *adapter = netdev_priv(netdev);
struct igb_ring *tx_ring;
int r_idx = 0;
if (test_bit(__IGB_DOWN, &adapter->state)) {
dev_kfree_skb_any(skb);
@ -4396,14 +4385,17 @@ static netdev_tx_t igb_xmit_frame_adv(struct sk_buff *skb,
return NETDEV_TX_OK;
}
r_idx = skb->queue_mapping & (IGB_ABS_MAX_TX_QUEUES - 1);
tx_ring = adapter->multi_tx_table[r_idx];
/*
* The minimum packet size with TCTL.PSP set is 17 so pad the skb
* in order to meet this minimum size requirement.
*/
if (skb->len < 17) {
if (skb_padto(skb, 17))
return NETDEV_TX_OK;
skb->len = 17;
}
/* This goes back to the question of how to logically map a tx queue
* to a flow. Right now, performance is impacted slightly negatively
* if using multiple tx queues. If the stack breaks away from a
* single qdisc implementation, we can look at this again. */
return igb_xmit_frame_ring_adv(skb, tx_ring);
return igb_xmit_frame_ring(skb, igb_tx_queue_mapping(adapter, skb));
}
/**
@ -4466,14 +4458,14 @@ static int igb_change_mtu(struct net_device *netdev, int new_mtu)
{
struct igb_adapter *adapter = netdev_priv(netdev);
struct pci_dev *pdev = adapter->pdev;
int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
u32 rx_buffer_len, i;
int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
if ((new_mtu < 68) || (max_frame > MAX_JUMBO_FRAME_SIZE)) {
dev_err(&pdev->dev, "Invalid MTU setting\n");
return -EINVAL;
}
#define MAX_STD_JUMBO_FRAME_SIZE 9238
if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
dev_err(&pdev->dev, "MTU > 9216 not supported.\n");
return -EINVAL;
@ -4485,30 +4477,6 @@ static int igb_change_mtu(struct net_device *netdev, int new_mtu)
/* igb_down has a dependency on max_frame_size */
adapter->max_frame_size = max_frame;
/* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
* means we reserve 2 more, this pushes us to allocate from the next
* larger slab size.
* i.e. RXBUFFER_2048 --> size-4096 slab
*/
if (adapter->hw.mac.type == e1000_82580)
max_frame += IGB_TS_HDR_LEN;
if (max_frame <= IGB_RXBUFFER_1024)
rx_buffer_len = IGB_RXBUFFER_1024;
else if (max_frame <= MAXIMUM_ETHERNET_VLAN_SIZE)
rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
else
rx_buffer_len = IGB_RXBUFFER_128;
if ((max_frame == ETH_FRAME_LEN + ETH_FCS_LEN + IGB_TS_HDR_LEN) ||
(max_frame == MAXIMUM_ETHERNET_VLAN_SIZE + IGB_TS_HDR_LEN))
rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE + IGB_TS_HDR_LEN;
if ((adapter->hw.mac.type == e1000_82580) &&
(rx_buffer_len == IGB_RXBUFFER_128))
rx_buffer_len += IGB_RXBUFFER_64;
if (netif_running(netdev))
igb_down(adapter);
@ -4516,9 +4484,6 @@ static int igb_change_mtu(struct net_device *netdev, int new_mtu)
netdev->mtu, new_mtu);
netdev->mtu = new_mtu;
for (i = 0; i < adapter->num_rx_queues; i++)
adapter->rx_ring[i]->rx_buffer_len = rx_buffer_len;
if (netif_running(netdev))
igb_up(adapter);
else
@ -5524,28 +5489,27 @@ static int igb_poll(struct napi_struct *napi, int budget)
struct igb_q_vector *q_vector = container_of(napi,
struct igb_q_vector,
napi);
int tx_clean_complete = 1, work_done = 0;
bool clean_complete = true;
#ifdef CONFIG_IGB_DCA
if (q_vector->adapter->flags & IGB_FLAG_DCA_ENABLED)
igb_update_dca(q_vector);
#endif
if (q_vector->tx_ring)
tx_clean_complete = igb_clean_tx_irq(q_vector);
clean_complete = !!igb_clean_tx_irq(q_vector);
if (q_vector->rx_ring)
igb_clean_rx_irq_adv(q_vector, &work_done, budget);
clean_complete &= igb_clean_rx_irq(q_vector, budget);
if (!tx_clean_complete)
work_done = budget;
/* If all work not completed, return budget and keep polling */
if (!clean_complete)
return budget;
/* If not enough Rx work done, exit the polling mode */
if (work_done < budget) {
napi_complete(napi);
igb_ring_irq_enable(q_vector);
}
return work_done;
return 0;
}
/**
@ -5624,13 +5588,13 @@ static bool igb_clean_tx_irq(struct igb_q_vector *q_vector)
i = tx_ring->next_to_clean;
eop = tx_ring->buffer_info[i].next_to_watch;
eop_desc = E1000_TX_DESC_ADV(*tx_ring, eop);
eop_desc = IGB_TX_DESC(tx_ring, eop);
while ((eop_desc->wb.status & cpu_to_le32(E1000_TXD_STAT_DD)) &&
(count < tx_ring->count)) {
rmb(); /* read buffer_info after eop_desc status */
for (cleaned = false; !cleaned; count++) {
tx_desc = E1000_TX_DESC_ADV(*tx_ring, i);
tx_desc = IGB_TX_DESC(tx_ring, i);
buffer_info = &tx_ring->buffer_info[i];
cleaned = (i == eop);
@ -5649,7 +5613,7 @@ static bool igb_clean_tx_irq(struct igb_q_vector *q_vector)
i = 0;
}
eop = tx_ring->buffer_info[i].next_to_watch;
eop_desc = E1000_TX_DESC_ADV(*tx_ring, eop);
eop_desc = IGB_TX_DESC(tx_ring, eop);
}
tx_ring->next_to_clean = i;
@ -5694,7 +5658,7 @@ static bool igb_clean_tx_irq(struct igb_q_vector *q_vector)
" jiffies <%lx>\n"
" desc.status <%x>\n",
tx_ring->queue_index,
readl(tx_ring->head),
rd32(E1000_TDH(tx_ring->reg_idx)),
readl(tx_ring->tail),
tx_ring->next_to_use,
tx_ring->next_to_clean,
@ -5714,7 +5678,7 @@ static bool igb_clean_tx_irq(struct igb_q_vector *q_vector)
return count < tx_ring->count;
}
static inline void igb_rx_checksum_adv(struct igb_ring *ring,
static inline void igb_rx_checksum(struct igb_ring *ring,
u32 status_err, struct sk_buff *skb)
{
skb_checksum_none_assert(skb);
@ -5781,8 +5745,7 @@ static void igb_rx_hwtstamp(struct igb_q_vector *q_vector, u32 staterr,
igb_systim_to_hwtstamp(adapter, skb_hwtstamps(skb), regval);
}
static inline u16 igb_get_hlen(struct igb_ring *rx_ring,
union e1000_adv_rx_desc *rx_desc)
static inline u16 igb_get_hlen(union e1000_adv_rx_desc *rx_desc)
{
/* HW will not DMA in data larger than the given buffer, even if it
* parses the (NFS, of course) header to be larger. In that case, it
@ -5790,98 +5753,89 @@ static inline u16 igb_get_hlen(struct igb_ring *rx_ring,
*/
u16 hlen = (le16_to_cpu(rx_desc->wb.lower.lo_dword.hdr_info) &
E1000_RXDADV_HDRBUFLEN_MASK) >> E1000_RXDADV_HDRBUFLEN_SHIFT;
if (hlen > rx_ring->rx_buffer_len)
hlen = rx_ring->rx_buffer_len;
if (hlen > IGB_RX_HDR_LEN)
hlen = IGB_RX_HDR_LEN;
return hlen;
}
static bool igb_clean_rx_irq_adv(struct igb_q_vector *q_vector,
int *work_done, int budget)
static bool igb_clean_rx_irq(struct igb_q_vector *q_vector, int budget)
{
struct igb_ring *rx_ring = q_vector->rx_ring;
struct net_device *netdev = rx_ring->netdev;
struct device *dev = rx_ring->dev;
union e1000_adv_rx_desc *rx_desc , *next_rxd;
struct igb_buffer *buffer_info , *next_buffer;
struct sk_buff *skb;
bool cleaned = false;
int cleaned_count = 0;
int current_node = numa_node_id();
union e1000_adv_rx_desc *rx_desc;
const int current_node = numa_node_id();
unsigned int total_bytes = 0, total_packets = 0;
unsigned int i;
u32 staterr;
u16 length;
u16 cleaned_count = igb_desc_unused(rx_ring);
u16 i = rx_ring->next_to_clean;
i = rx_ring->next_to_clean;
buffer_info = &rx_ring->buffer_info[i];
rx_desc = E1000_RX_DESC_ADV(*rx_ring, i);
rx_desc = IGB_RX_DESC(rx_ring, i);
staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
while (staterr & E1000_RXD_STAT_DD) {
if (*work_done >= budget)
break;
(*work_done)++;
rmb(); /* read descriptor and rx_buffer_info after status DD */
struct igb_buffer *buffer_info = &rx_ring->buffer_info[i];
struct sk_buff *skb = buffer_info->skb;
union e1000_adv_rx_desc *next_rxd;
skb = buffer_info->skb;
prefetch(skb->data - NET_IP_ALIGN);
buffer_info->skb = NULL;
prefetch(skb->data);
i++;
if (i == rx_ring->count)
i = 0;
next_rxd = E1000_RX_DESC_ADV(*rx_ring, i);
next_rxd = IGB_RX_DESC(rx_ring, i);
prefetch(next_rxd);
next_buffer = &rx_ring->buffer_info[i];
length = le16_to_cpu(rx_desc->wb.upper.length);
cleaned = true;
cleaned_count++;
/*
* This memory barrier is needed to keep us from reading
* any other fields out of the rx_desc until we know the
* RXD_STAT_DD bit is set
*/
rmb();
if (buffer_info->dma) {
dma_unmap_single(dev, buffer_info->dma,
rx_ring->rx_buffer_len,
if (!skb_is_nonlinear(skb)) {
__skb_put(skb, igb_get_hlen(rx_desc));
dma_unmap_single(rx_ring->dev, buffer_info->dma,
IGB_RX_HDR_LEN,
DMA_FROM_DEVICE);
buffer_info->dma = 0;
if (rx_ring->rx_buffer_len >= IGB_RXBUFFER_1024) {
skb_put(skb, length);
goto send_up;
}
skb_put(skb, igb_get_hlen(rx_ring, rx_desc));
}
if (length) {
dma_unmap_page(dev, buffer_info->page_dma,
PAGE_SIZE / 2, DMA_FROM_DEVICE);
buffer_info->page_dma = 0;
if (rx_desc->wb.upper.length) {
u16 length = le16_to_cpu(rx_desc->wb.upper.length);
skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
buffer_info->page,
buffer_info->page_offset,
length);
skb->len += length;
skb->data_len += length;
skb->truesize += length;
if ((page_count(buffer_info->page) != 1) ||
(page_to_nid(buffer_info->page) != current_node))
buffer_info->page = NULL;
else
get_page(buffer_info->page);
skb->len += length;
skb->data_len += length;
skb->truesize += length;
dma_unmap_page(rx_ring->dev, buffer_info->page_dma,
PAGE_SIZE / 2, DMA_FROM_DEVICE);
buffer_info->page_dma = 0;
}
if (!(staterr & E1000_RXD_STAT_EOP)) {
struct igb_buffer *next_buffer;
next_buffer = &rx_ring->buffer_info[i];
buffer_info->skb = next_buffer->skb;
buffer_info->dma = next_buffer->dma;
next_buffer->skb = skb;
next_buffer->dma = 0;
goto next_desc;
}
send_up:
if (staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) {
dev_kfree_skb_irq(skb);
dev_kfree_skb_any(skb);
goto next_desc;
}
@ -5890,10 +5844,9 @@ send_up:
total_bytes += skb->len;
total_packets++;
igb_rx_checksum_adv(rx_ring, staterr, skb);
igb_rx_checksum(rx_ring, staterr, skb);
skb->protocol = eth_type_trans(skb, netdev);
skb_record_rx_queue(skb, rx_ring->queue_index);
skb->protocol = eth_type_trans(skb, rx_ring->netdev);
if (staterr & E1000_RXD_STAT_VP) {
u16 vid = le16_to_cpu(rx_desc->wb.upper.vlan);
@ -5902,135 +5855,148 @@ send_up:
}
napi_gro_receive(&q_vector->napi, skb);
budget--;
next_desc:
rx_desc->wb.upper.status_error = 0;
if (!budget)
break;
cleaned_count++;
/* return some buffers to hardware, one at a time is too slow */
if (cleaned_count >= IGB_RX_BUFFER_WRITE) {
igb_alloc_rx_buffers_adv(rx_ring, cleaned_count);
igb_alloc_rx_buffers(rx_ring, cleaned_count);
cleaned_count = 0;
}
/* use prefetched values */
rx_desc = next_rxd;
buffer_info = next_buffer;
staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
}
rx_ring->next_to_clean = i;
cleaned_count = igb_desc_unused(rx_ring);
if (cleaned_count)
igb_alloc_rx_buffers_adv(rx_ring, cleaned_count);
rx_ring->total_packets += total_packets;
rx_ring->total_bytes += total_bytes;
u64_stats_update_begin(&rx_ring->rx_syncp);
rx_ring->rx_stats.packets += total_packets;
rx_ring->rx_stats.bytes += total_bytes;
u64_stats_update_end(&rx_ring->rx_syncp);
return cleaned;
rx_ring->total_packets += total_packets;
rx_ring->total_bytes += total_bytes;
if (cleaned_count)
igb_alloc_rx_buffers(rx_ring, cleaned_count);
return !!budget;
}
static bool igb_alloc_mapped_skb(struct igb_ring *rx_ring,
struct igb_buffer *bi)
{
struct sk_buff *skb = bi->skb;
dma_addr_t dma = bi->dma;
if (dma)
return true;
if (likely(!skb)) {
skb = netdev_alloc_skb_ip_align(rx_ring->netdev,
IGB_RX_HDR_LEN);
bi->skb = skb;
if (!skb) {
rx_ring->rx_stats.alloc_failed++;
return false;
}
/* initialize skb for ring */
skb_record_rx_queue(skb, rx_ring->queue_index);
}
dma = dma_map_single(rx_ring->dev, skb->data,
IGB_RX_HDR_LEN, DMA_FROM_DEVICE);
if (dma_mapping_error(rx_ring->dev, dma)) {
rx_ring->rx_stats.alloc_failed++;
return false;
}
bi->dma = dma;
return true;
}
static bool igb_alloc_mapped_page(struct igb_ring *rx_ring,
struct igb_buffer *bi)
{
struct page *page = bi->page;
dma_addr_t page_dma = bi->page_dma;
unsigned int page_offset = bi->page_offset ^ (PAGE_SIZE / 2);
if (page_dma)
return true;
if (!page) {
page = netdev_alloc_page(rx_ring->netdev);
bi->page = page;
if (unlikely(!page)) {
rx_ring->rx_stats.alloc_failed++;
return false;
}
}
page_dma = dma_map_page(rx_ring->dev, page,
page_offset, PAGE_SIZE / 2,
DMA_FROM_DEVICE);
if (dma_mapping_error(rx_ring->dev, page_dma)) {
rx_ring->rx_stats.alloc_failed++;
return false;
}
bi->page_dma = page_dma;
bi->page_offset = page_offset;
return true;
}
/**
* igb_alloc_rx_buffers_adv - Replace used receive buffers; packet split
* igb_alloc_rx_buffers - Replace used receive buffers; packet split
* @adapter: address of board private structure
**/
void igb_alloc_rx_buffers_adv(struct igb_ring *rx_ring, int cleaned_count)
void igb_alloc_rx_buffers(struct igb_ring *rx_ring, u16 cleaned_count)
{
struct net_device *netdev = rx_ring->netdev;
union e1000_adv_rx_desc *rx_desc;
struct igb_buffer *buffer_info;
struct sk_buff *skb;
unsigned int i;
int bufsz;
struct igb_buffer *bi;
u16 i = rx_ring->next_to_use;
i = rx_ring->next_to_use;
buffer_info = &rx_ring->buffer_info[i];
bufsz = rx_ring->rx_buffer_len;
rx_desc = IGB_RX_DESC(rx_ring, i);
bi = &rx_ring->buffer_info[i];
i -= rx_ring->count;
while (cleaned_count--) {
rx_desc = E1000_RX_DESC_ADV(*rx_ring, i);
if (!igb_alloc_mapped_skb(rx_ring, bi))
break;
if ((bufsz < IGB_RXBUFFER_1024) && !buffer_info->page_dma) {
if (!buffer_info->page) {
buffer_info->page = netdev_alloc_page(netdev);
if (unlikely(!buffer_info->page)) {
u64_stats_update_begin(&rx_ring->rx_syncp);
rx_ring->rx_stats.alloc_failed++;
u64_stats_update_end(&rx_ring->rx_syncp);
goto no_buffers;
}
buffer_info->page_offset = 0;
} else {
buffer_info->page_offset ^= PAGE_SIZE / 2;
}
buffer_info->page_dma =
dma_map_page(rx_ring->dev, buffer_info->page,
buffer_info->page_offset,
PAGE_SIZE / 2,
DMA_FROM_DEVICE);
if (dma_mapping_error(rx_ring->dev,
buffer_info->page_dma)) {
buffer_info->page_dma = 0;
u64_stats_update_begin(&rx_ring->rx_syncp);
rx_ring->rx_stats.alloc_failed++;
u64_stats_update_end(&rx_ring->rx_syncp);
goto no_buffers;
}
/* Refresh the desc even if buffer_addrs didn't change
* because each write-back erases this info. */
rx_desc->read.hdr_addr = cpu_to_le64(bi->dma);
if (!igb_alloc_mapped_page(rx_ring, bi))
break;
rx_desc->read.pkt_addr = cpu_to_le64(bi->page_dma);
rx_desc++;
bi++;
i++;
if (unlikely(!i)) {
rx_desc = IGB_RX_DESC(rx_ring, 0);
bi = rx_ring->buffer_info;
i -= rx_ring->count;
}
skb = buffer_info->skb;
if (!skb) {
skb = netdev_alloc_skb_ip_align(netdev, bufsz);
if (unlikely(!skb)) {
u64_stats_update_begin(&rx_ring->rx_syncp);
rx_ring->rx_stats.alloc_failed++;
u64_stats_update_end(&rx_ring->rx_syncp);
goto no_buffers;
}
buffer_info->skb = skb;
}
if (!buffer_info->dma) {
buffer_info->dma = dma_map_single(rx_ring->dev,
skb->data,
bufsz,
DMA_FROM_DEVICE);
if (dma_mapping_error(rx_ring->dev,
buffer_info->dma)) {
buffer_info->dma = 0;
u64_stats_update_begin(&rx_ring->rx_syncp);
rx_ring->rx_stats.alloc_failed++;
u64_stats_update_end(&rx_ring->rx_syncp);
goto no_buffers;
}
}
/* Refresh the desc even if buffer_addrs didn't change because
* each write-back erases this info. */
if (bufsz < IGB_RXBUFFER_1024) {
rx_desc->read.pkt_addr =
cpu_to_le64(buffer_info->page_dma);
rx_desc->read.hdr_addr = cpu_to_le64(buffer_info->dma);
} else {
rx_desc->read.pkt_addr = cpu_to_le64(buffer_info->dma);
/* clear the hdr_addr for the next_to_use descriptor */
rx_desc->read.hdr_addr = 0;
}
i++;
if (i == rx_ring->count)
i = 0;
buffer_info = &rx_ring->buffer_info[i];
}
i += rx_ring->count;
no_buffers:
if (rx_ring->next_to_use != i) {
rx_ring->next_to_use = i;
if (i == 0)
i = (rx_ring->count - 1);
else
i--;
/* Force memory writes to complete before letting h/w
* know there are new descriptors to fetch. (Only