mirror of https://gitee.com/openkylin/linux.git
[PATCH] s2io: performance improvements
hi, This patch contains all the changes that were done to improve performance of s2io driver. one line description of the changes are 1. For Non NAPI case the rx interrupt handler is being called unconditionally 2. code optimization and adding prefetch skb->data 3. Remove modulo operations in fast path 4. Enable Group Reads and set backoff interval to 0x1000 5. correct PIC_CNTL_SHARED_SPLITS macro definition, and reduce pause parameter 6. Corrected logic of identifying rx buffer level in rx_buffer_level() 7. fix DMA map and unmap done with different sizes in 1-buf mode 8. Removed forcible disabling of ERO 9. Send up the packets with transfer code = 0x5 Signed-off-by: Ananda Raju <ananda.raju@neterion.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
parent
1fb5fef9b8
commit
863c11a91e
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@ -187,7 +187,7 @@ typedef struct _XENA_dev_config {
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/* PIC Control registers */
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/* PIC Control registers */
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u64 pic_control;
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u64 pic_control;
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#define PIC_CNTL_RX_ALARM_MAP_1 BIT(0)
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#define PIC_CNTL_RX_ALARM_MAP_1 BIT(0)
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#define PIC_CNTL_SHARED_SPLITS(n) vBIT(n,11,4)
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#define PIC_CNTL_SHARED_SPLITS(n) vBIT(n,11,5)
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u64 swapper_ctrl;
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u64 swapper_ctrl;
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#define SWAPPER_CTRL_PIF_R_FE BIT(0)
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#define SWAPPER_CTRL_PIF_R_FE BIT(0)
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@ -284,9 +284,13 @@ typedef struct _XENA_dev_config {
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u64 gpio_control;
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u64 gpio_control;
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#define GPIO_CTRL_GPIO_0 BIT(8)
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#define GPIO_CTRL_GPIO_0 BIT(8)
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u64 misc_control;
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u64 misc_control;
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#define EXT_REQ_EN BIT(1)
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#define MISC_LINK_STABILITY_PRD(val) vBIT(val,29,3)
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#define MISC_LINK_STABILITY_PRD(val) vBIT(val,29,3)
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u8 unused7_1[0x240 - 0x208];
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u8 unused7_1[0x230 - 0x208];
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u64 pic_control2;
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u64 ini_dperr_ctrl;
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u64 wreq_split_mask;
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u64 wreq_split_mask;
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#define WREQ_SPLIT_MASK_SET_MASK(val) vBIT(val, 52, 12)
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#define WREQ_SPLIT_MASK_SET_MASK(val) vBIT(val, 52, 12)
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@ -493,6 +497,7 @@ typedef struct _XENA_dev_config {
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#define PRC_CTRL_NO_SNOOP_DESC BIT(22)
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#define PRC_CTRL_NO_SNOOP_DESC BIT(22)
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#define PRC_CTRL_NO_SNOOP_BUFF BIT(23)
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#define PRC_CTRL_NO_SNOOP_BUFF BIT(23)
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#define PRC_CTRL_BIMODAL_INTERRUPT BIT(37)
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#define PRC_CTRL_BIMODAL_INTERRUPT BIT(37)
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#define PRC_CTRL_GROUP_READS BIT(38)
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#define PRC_CTRL_RXD_BACKOFF_INTERVAL(val) vBIT(val,40,24)
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#define PRC_CTRL_RXD_BACKOFF_INTERVAL(val) vBIT(val,40,24)
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u64 prc_alarm_action;
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u64 prc_alarm_action;
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@ -106,18 +106,14 @@ static inline int RXD_IS_UP2DT(RxD_t *rxdp)
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#define LOW 2
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#define LOW 2
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static inline int rx_buffer_level(nic_t * sp, int rxb_size, int ring)
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static inline int rx_buffer_level(nic_t * sp, int rxb_size, int ring)
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{
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{
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int level = 0;
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mac_info_t *mac_control;
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mac_info_t *mac_control;
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mac_control = &sp->mac_control;
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mac_control = &sp->mac_control;
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if ((mac_control->rings[ring].pkt_cnt - rxb_size) > 16) {
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if (rxb_size <= rxd_count[sp->rxd_mode])
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level = LOW;
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return PANIC;
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if (rxb_size <= rxd_count[sp->rxd_mode]) {
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else if ((mac_control->rings[ring].pkt_cnt - rxb_size) > 16)
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level = PANIC;
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return LOW;
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}
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return 0;
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}
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return level;
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}
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}
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/* Ethtool related variables and Macros. */
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/* Ethtool related variables and Macros. */
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@ -311,7 +307,7 @@ static unsigned int rts_frm_len[MAX_RX_RINGS] =
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{[0 ...(MAX_RX_RINGS - 1)] = 0 };
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{[0 ...(MAX_RX_RINGS - 1)] = 0 };
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static unsigned int rx_ring_mode = 1;
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static unsigned int rx_ring_mode = 1;
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static unsigned int use_continuous_tx_intrs = 1;
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static unsigned int use_continuous_tx_intrs = 1;
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static unsigned int rmac_pause_time = 65535;
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static unsigned int rmac_pause_time = 0x100;
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static unsigned int mc_pause_threshold_q0q3 = 187;
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static unsigned int mc_pause_threshold_q0q3 = 187;
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static unsigned int mc_pause_threshold_q4q7 = 187;
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static unsigned int mc_pause_threshold_q4q7 = 187;
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static unsigned int shared_splits;
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static unsigned int shared_splits;
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@ -1545,13 +1541,22 @@ static int init_nic(struct s2io_nic *nic)
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val64 |= PIC_CNTL_SHARED_SPLITS(shared_splits);
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val64 |= PIC_CNTL_SHARED_SPLITS(shared_splits);
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writeq(val64, &bar0->pic_control);
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writeq(val64, &bar0->pic_control);
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if (nic->config.bus_speed == 266) {
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writeq(TXREQTO_VAL(0x7f) | TXREQTO_EN, &bar0->txreqtimeout);
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writeq(0x0, &bar0->read_retry_delay);
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writeq(0x0, &bar0->write_retry_delay);
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}
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/*
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/*
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* Programming the Herc to split every write transaction
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* Programming the Herc to split every write transaction
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* that does not start on an ADB to reduce disconnects.
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* that does not start on an ADB to reduce disconnects.
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*/
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*/
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if (nic->device_type == XFRAME_II_DEVICE) {
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if (nic->device_type == XFRAME_II_DEVICE) {
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val64 = WREQ_SPLIT_MASK_SET_MASK(255);
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val64 = EXT_REQ_EN | MISC_LINK_STABILITY_PRD(3);
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writeq(val64, &bar0->wreq_split_mask);
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writeq(val64, &bar0->misc_control);
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val64 = readq(&bar0->pic_control2);
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val64 &= ~(BIT(13)|BIT(14)|BIT(15));
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writeq(val64, &bar0->pic_control2);
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}
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}
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/* Setting Link stability period to 64 ms */
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/* Setting Link stability period to 64 ms */
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@ -1948,6 +1953,10 @@ static int start_nic(struct s2io_nic *nic)
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val64 |= PRC_CTRL_RC_ENABLED;
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val64 |= PRC_CTRL_RC_ENABLED;
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else
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else
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val64 |= PRC_CTRL_RC_ENABLED | PRC_CTRL_RING_MODE_3;
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val64 |= PRC_CTRL_RC_ENABLED | PRC_CTRL_RING_MODE_3;
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if (nic->device_type == XFRAME_II_DEVICE)
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val64 |= PRC_CTRL_GROUP_READS;
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val64 &= ~PRC_CTRL_RXD_BACKOFF_INTERVAL(0xFFFFFF);
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val64 |= PRC_CTRL_RXD_BACKOFF_INTERVAL(0x1000);
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writeq(val64, &bar0->prc_ctrl_n[i]);
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writeq(val64, &bar0->prc_ctrl_n[i]);
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}
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}
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@ -2231,13 +2240,12 @@ static int fill_rx_buffers(struct s2io_nic *nic, int ring_no)
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alloc_cnt = mac_control->rings[ring_no].pkt_cnt -
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alloc_cnt = mac_control->rings[ring_no].pkt_cnt -
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atomic_read(&nic->rx_bufs_left[ring_no]);
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atomic_read(&nic->rx_bufs_left[ring_no]);
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block_no1 = mac_control->rings[ring_no].rx_curr_get_info.block_index;
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off1 = mac_control->rings[ring_no].rx_curr_get_info.offset;
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while (alloc_tab < alloc_cnt) {
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while (alloc_tab < alloc_cnt) {
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block_no = mac_control->rings[ring_no].rx_curr_put_info.
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block_no = mac_control->rings[ring_no].rx_curr_put_info.
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block_index;
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block_index;
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block_no1 = mac_control->rings[ring_no].rx_curr_get_info.
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block_index;
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off = mac_control->rings[ring_no].rx_curr_put_info.offset;
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off = mac_control->rings[ring_no].rx_curr_put_info.offset;
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off1 = mac_control->rings[ring_no].rx_curr_get_info.offset;
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rxdp = mac_control->rings[ring_no].
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rxdp = mac_control->rings[ring_no].
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rx_blocks[block_no].rxds[off].virt_addr;
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rx_blocks[block_no].rxds[off].virt_addr;
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@ -2307,9 +2315,9 @@ static int fill_rx_buffers(struct s2io_nic *nic, int ring_no)
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memset(rxdp, 0, sizeof(RxD1_t));
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memset(rxdp, 0, sizeof(RxD1_t));
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skb_reserve(skb, NET_IP_ALIGN);
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skb_reserve(skb, NET_IP_ALIGN);
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((RxD1_t*)rxdp)->Buffer0_ptr = pci_map_single
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((RxD1_t*)rxdp)->Buffer0_ptr = pci_map_single
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(nic->pdev, skb->data, size, PCI_DMA_FROMDEVICE);
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(nic->pdev, skb->data, size - NET_IP_ALIGN,
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rxdp->Control_2 &= (~MASK_BUFFER0_SIZE_1);
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PCI_DMA_FROMDEVICE);
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rxdp->Control_2 |= SET_BUFFER0_SIZE_1(size);
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rxdp->Control_2 = SET_BUFFER0_SIZE_1(size - NET_IP_ALIGN);
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} else if (nic->rxd_mode >= RXD_MODE_3A) {
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} else if (nic->rxd_mode >= RXD_MODE_3A) {
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/*
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/*
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@ -2516,7 +2524,7 @@ static int s2io_poll(struct net_device *dev, int *budget)
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mac_info_t *mac_control;
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mac_info_t *mac_control;
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struct config_param *config;
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struct config_param *config;
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XENA_dev_config_t __iomem *bar0 = nic->bar0;
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XENA_dev_config_t __iomem *bar0 = nic->bar0;
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u64 val64;
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u64 val64 = 0xFFFFFFFFFFFFFFFFULL;
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int i;
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int i;
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atomic_inc(&nic->isr_cnt);
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atomic_inc(&nic->isr_cnt);
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@ -2528,8 +2536,8 @@ static int s2io_poll(struct net_device *dev, int *budget)
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nic->pkts_to_process = dev->quota;
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nic->pkts_to_process = dev->quota;
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org_pkts_to_process = nic->pkts_to_process;
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org_pkts_to_process = nic->pkts_to_process;
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val64 = readq(&bar0->rx_traffic_int);
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writeq(val64, &bar0->rx_traffic_int);
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writeq(val64, &bar0->rx_traffic_int);
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val64 = readl(&bar0->rx_traffic_int);
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for (i = 0; i < config->rx_ring_num; i++) {
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for (i = 0; i < config->rx_ring_num; i++) {
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rx_intr_handler(&mac_control->rings[i]);
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rx_intr_handler(&mac_control->rings[i]);
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@ -2666,6 +2674,7 @@ static void rx_intr_handler(ring_info_t *ring_data)
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((RxD3_t*)rxdp)->Buffer2_ptr,
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((RxD3_t*)rxdp)->Buffer2_ptr,
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dev->mtu, PCI_DMA_FROMDEVICE);
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dev->mtu, PCI_DMA_FROMDEVICE);
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}
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}
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prefetch(skb->data);
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rx_osm_handler(ring_data, rxdp);
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rx_osm_handler(ring_data, rxdp);
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get_info.offset++;
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get_info.offset++;
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ring_data->rx_curr_get_info.offset = get_info.offset;
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ring_data->rx_curr_get_info.offset = get_info.offset;
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@ -2760,7 +2769,8 @@ to loss of link\n");
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dev_kfree_skb_irq(skb);
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dev_kfree_skb_irq(skb);
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get_info.offset++;
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get_info.offset++;
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get_info.offset %= get_info.fifo_len + 1;
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if (get_info.offset == get_info.fifo_len + 1)
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get_info.offset = 0;
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txdlp = (TxD_t *) fifo_data->list_info
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txdlp = (TxD_t *) fifo_data->list_info
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[get_info.offset].list_virt_addr;
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[get_info.offset].list_virt_addr;
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fifo_data->tx_curr_get_info.offset =
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fifo_data->tx_curr_get_info.offset =
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@ -3545,7 +3555,8 @@ static int s2io_xmit(struct sk_buff *skb, struct net_device *dev)
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queue_len = mac_control->fifos[queue].tx_curr_put_info.fifo_len + 1;
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queue_len = mac_control->fifos[queue].tx_curr_put_info.fifo_len + 1;
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/* Avoid "put" pointer going beyond "get" pointer */
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/* Avoid "put" pointer going beyond "get" pointer */
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if (txdp->Host_Control || (((put_off + 1) % queue_len) == get_off)) {
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if (txdp->Host_Control ||
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((put_off+1) == queue_len ? 0 : (put_off+1)) == get_off) {
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DBG_PRINT(TX_DBG, "Error in xmit, No free TXDs.\n");
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DBG_PRINT(TX_DBG, "Error in xmit, No free TXDs.\n");
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netif_stop_queue(dev);
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netif_stop_queue(dev);
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dev_kfree_skb(skb);
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dev_kfree_skb(skb);
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@ -3655,11 +3666,12 @@ static int s2io_xmit(struct sk_buff *skb, struct net_device *dev)
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mmiowb();
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mmiowb();
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put_off++;
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put_off++;
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put_off %= mac_control->fifos[queue].tx_curr_put_info.fifo_len + 1;
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if (put_off == mac_control->fifos[queue].tx_curr_put_info.fifo_len + 1)
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put_off = 0;
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mac_control->fifos[queue].tx_curr_put_info.offset = put_off;
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mac_control->fifos[queue].tx_curr_put_info.offset = put_off;
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/* Avoid "put" pointer going beyond "get" pointer */
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/* Avoid "put" pointer going beyond "get" pointer */
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if (((put_off + 1) % queue_len) == get_off) {
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if (((put_off+1) == queue_len ? 0 : (put_off+1)) == get_off) {
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DBG_PRINT(TX_DBG,
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DBG_PRINT(TX_DBG,
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"No free TxDs for xmit, Put: 0x%x Get:0x%x\n",
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"No free TxDs for xmit, Put: 0x%x Get:0x%x\n",
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put_off, get_off);
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put_off, get_off);
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@ -3887,43 +3899,37 @@ static irqreturn_t s2io_isr(int irq, void *dev_id, struct pt_regs *regs)
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return IRQ_NONE;
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return IRQ_NONE;
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}
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}
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val64 = 0xFFFFFFFFFFFFFFFFULL;
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#ifdef CONFIG_S2IO_NAPI
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#ifdef CONFIG_S2IO_NAPI
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if (reason & GEN_INTR_RXTRAFFIC) {
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if (reason & GEN_INTR_RXTRAFFIC) {
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if (netif_rx_schedule_prep(dev)) {
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if (netif_rx_schedule_prep(dev)) {
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en_dis_able_nic_intrs(sp, RX_TRAFFIC_INTR,
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writeq(val64, &bar0->rx_traffic_mask);
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DISABLE_INTRS);
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__netif_rx_schedule(dev);
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__netif_rx_schedule(dev);
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}
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}
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}
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}
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#else
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#else
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/* If Intr is because of Rx Traffic */
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if (reason & GEN_INTR_RXTRAFFIC) {
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/*
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/*
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* Rx handler is called by default, without checking for the
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* cause of interrupt.
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* rx_traffic_int reg is an R1 register, writing all 1's
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* rx_traffic_int reg is an R1 register, writing all 1's
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* will ensure that the actual interrupt causing bit get's
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* will ensure that the actual interrupt causing bit get's
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* cleared and hence a read can be avoided.
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* cleared and hence a read can be avoided.
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*/
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*/
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val64 = 0xFFFFFFFFFFFFFFFFULL;
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writeq(val64, &bar0->rx_traffic_int);
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writeq(val64, &bar0->rx_traffic_int);
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for (i = 0; i < config->rx_ring_num; i++) {
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for (i = 0; i < config->rx_ring_num; i++) {
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rx_intr_handler(&mac_control->rings[i]);
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rx_intr_handler(&mac_control->rings[i]);
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}
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}
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}
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#endif
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#endif
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/* If Intr is because of Tx Traffic */
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if (reason & GEN_INTR_TXTRAFFIC) {
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/*
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/*
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* tx_traffic_int reg is an R1 register, writing all 1's
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* tx_traffic_int reg is an R1 register, writing all 1's
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* will ensure that the actual interrupt causing bit get's
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* will ensure that the actual interrupt causing bit get's
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* cleared and hence a read can be avoided.
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* cleared and hence a read can be avoided.
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*/
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*/
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val64 = 0xFFFFFFFFFFFFFFFFULL;
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writeq(val64, &bar0->tx_traffic_int);
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writeq(val64, &bar0->tx_traffic_int);
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for (i = 0; i < config->tx_fifo_num; i++)
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for (i = 0; i < config->tx_fifo_num; i++)
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tx_intr_handler(&mac_control->fifos[i]);
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tx_intr_handler(&mac_control->fifos[i]);
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}
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if (reason & GEN_INTR_TXPIC)
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if (reason & GEN_INTR_TXPIC)
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s2io_txpic_intr_handle(sp);
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s2io_txpic_intr_handle(sp);
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@ -5695,19 +5701,28 @@ static int rx_osm_handler(ring_info_t *ring_data, RxD_t * rxdp)
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((unsigned long) rxdp->Host_Control);
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((unsigned long) rxdp->Host_Control);
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int ring_no = ring_data->ring_no;
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int ring_no = ring_data->ring_no;
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u16 l3_csum, l4_csum;
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u16 l3_csum, l4_csum;
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unsigned long long err = rxdp->Control_1 & RXD_T_CODE;
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lro_t *lro;
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lro_t *lro;
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skb->dev = dev;
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skb->dev = dev;
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if (rxdp->Control_1 & RXD_T_CODE) {
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if (err) {
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unsigned long long err = rxdp->Control_1 & RXD_T_CODE;
|
/*
|
||||||
|
* Drop the packet if bad transfer code. Exception being
|
||||||
|
* 0x5, which could be due to unsupported IPv6 extension header.
|
||||||
|
* In this case, we let stack handle the packet.
|
||||||
|
* Note that in this case, since checksum will be incorrect,
|
||||||
|
* stack will validate the same.
|
||||||
|
*/
|
||||||
|
if (err && ((err >> 48) != 0x5)) {
|
||||||
DBG_PRINT(ERR_DBG, "%s: Rx error Value: 0x%llx\n",
|
DBG_PRINT(ERR_DBG, "%s: Rx error Value: 0x%llx\n",
|
||||||
dev->name, err);
|
dev->name, err);
|
||||||
dev_kfree_skb(skb);
|
|
||||||
sp->stats.rx_crc_errors++;
|
sp->stats.rx_crc_errors++;
|
||||||
|
dev_kfree_skb(skb);
|
||||||
atomic_dec(&sp->rx_bufs_left[ring_no]);
|
atomic_dec(&sp->rx_bufs_left[ring_no]);
|
||||||
rxdp->Host_Control = 0;
|
rxdp->Host_Control = 0;
|
||||||
return 0;
|
return 0;
|
||||||
}
|
}
|
||||||
|
}
|
||||||
|
|
||||||
/* Updating statistics */
|
/* Updating statistics */
|
||||||
rxdp->Host_Control = 0;
|
rxdp->Host_Control = 0;
|
||||||
|
@ -5918,13 +5933,6 @@ static void s2io_init_pci(nic_t * sp)
|
||||||
pci_write_config_word(sp->pdev, PCI_COMMAND,
|
pci_write_config_word(sp->pdev, PCI_COMMAND,
|
||||||
(pci_cmd | PCI_COMMAND_PARITY));
|
(pci_cmd | PCI_COMMAND_PARITY));
|
||||||
pci_read_config_word(sp->pdev, PCI_COMMAND, &pci_cmd);
|
pci_read_config_word(sp->pdev, PCI_COMMAND, &pci_cmd);
|
||||||
|
|
||||||
/* Forcibly disabling relaxed ordering capability of the card. */
|
|
||||||
pcix_cmd &= 0xfffd;
|
|
||||||
pci_write_config_word(sp->pdev, PCIX_COMMAND_REGISTER,
|
|
||||||
pcix_cmd);
|
|
||||||
pci_read_config_word(sp->pdev, PCIX_COMMAND_REGISTER,
|
|
||||||
&(pcix_cmd));
|
|
||||||
}
|
}
|
||||||
|
|
||||||
MODULE_AUTHOR("Raghavendra Koushik <raghavendra.koushik@neterion.com>");
|
MODULE_AUTHOR("Raghavendra Koushik <raghavendra.koushik@neterion.com>");
|
||||||
|
|
Loading…
Reference in New Issue