/drivers/net/igbvf/netdev.c
https://bitbucket.org/slukk/jb-tsm-kernel-4.2 · C · 2873 lines · 1898 code · 491 blank · 484 comment · 271 complexity · 8872c0746cce4e1c1ffb8dfb42e44d8f MD5 · raw file
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- /*******************************************************************************
- Intel(R) 82576 Virtual Function Linux driver
- Copyright(c) 2009 - 2010 Intel Corporation.
- This program is free software; you can redistribute it and/or modify it
- under the terms and conditions of the GNU General Public License,
- version 2, as published by the Free Software Foundation.
- This program is distributed in the hope it will be useful, but WITHOUT
- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- more details.
- You should have received a copy of the GNU General Public License along with
- this program; if not, write to the Free Software Foundation, Inc.,
- 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
- The full GNU General Public License is included in this distribution in
- the file called "COPYING".
- Contact Information:
- e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
- Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
- *******************************************************************************/
- #include <linux/module.h>
- #include <linux/types.h>
- #include <linux/init.h>
- #include <linux/pci.h>
- #include <linux/vmalloc.h>
- #include <linux/pagemap.h>
- #include <linux/delay.h>
- #include <linux/netdevice.h>
- #include <linux/tcp.h>
- #include <linux/ipv6.h>
- #include <linux/slab.h>
- #include <net/checksum.h>
- #include <net/ip6_checksum.h>
- #include <linux/mii.h>
- #include <linux/ethtool.h>
- #include <linux/if_vlan.h>
- #include <linux/prefetch.h>
- #include "igbvf.h"
- #define DRV_VERSION "1.0.8-k0"
- char igbvf_driver_name[] = "igbvf";
- const char igbvf_driver_version[] = DRV_VERSION;
- static const char igbvf_driver_string[] =
- "Intel(R) Virtual Function Network Driver";
- static const char igbvf_copyright[] =
- "Copyright (c) 2009 - 2010 Intel Corporation.";
- static int igbvf_poll(struct napi_struct *napi, int budget);
- static void igbvf_reset(struct igbvf_adapter *);
- static void igbvf_set_interrupt_capability(struct igbvf_adapter *);
- static void igbvf_reset_interrupt_capability(struct igbvf_adapter *);
- static struct igbvf_info igbvf_vf_info = {
- .mac = e1000_vfadapt,
- .flags = 0,
- .pba = 10,
- .init_ops = e1000_init_function_pointers_vf,
- };
- static struct igbvf_info igbvf_i350_vf_info = {
- .mac = e1000_vfadapt_i350,
- .flags = 0,
- .pba = 10,
- .init_ops = e1000_init_function_pointers_vf,
- };
- static const struct igbvf_info *igbvf_info_tbl[] = {
- [board_vf] = &igbvf_vf_info,
- [board_i350_vf] = &igbvf_i350_vf_info,
- };
- /**
- * igbvf_desc_unused - calculate if we have unused descriptors
- **/
- static int igbvf_desc_unused(struct igbvf_ring *ring)
- {
- if (ring->next_to_clean > ring->next_to_use)
- return ring->next_to_clean - ring->next_to_use - 1;
- return ring->count + ring->next_to_clean - ring->next_to_use - 1;
- }
- /**
- * igbvf_receive_skb - helper function to handle Rx indications
- * @adapter: board private structure
- * @status: descriptor status field as written by hardware
- * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
- * @skb: pointer to sk_buff to be indicated to stack
- **/
- static void igbvf_receive_skb(struct igbvf_adapter *adapter,
- struct net_device *netdev,
- struct sk_buff *skb,
- u32 status, u16 vlan)
- {
- if (adapter->vlgrp && (status & E1000_RXD_STAT_VP))
- vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
- le16_to_cpu(vlan) &
- E1000_RXD_SPC_VLAN_MASK);
- else
- netif_receive_skb(skb);
- }
- static inline void igbvf_rx_checksum_adv(struct igbvf_adapter *adapter,
- u32 status_err, struct sk_buff *skb)
- {
- skb_checksum_none_assert(skb);
- /* Ignore Checksum bit is set or checksum is disabled through ethtool */
- if ((status_err & E1000_RXD_STAT_IXSM) ||
- (adapter->flags & IGBVF_FLAG_RX_CSUM_DISABLED))
- return;
- /* TCP/UDP checksum error bit is set */
- if (status_err &
- (E1000_RXDEXT_STATERR_TCPE | E1000_RXDEXT_STATERR_IPE)) {
- /* let the stack verify checksum errors */
- adapter->hw_csum_err++;
- return;
- }
- /* It must be a TCP or UDP packet with a valid checksum */
- if (status_err & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS))
- skb->ip_summed = CHECKSUM_UNNECESSARY;
- adapter->hw_csum_good++;
- }
- /**
- * igbvf_alloc_rx_buffers - Replace used receive buffers; packet split
- * @rx_ring: address of ring structure to repopulate
- * @cleaned_count: number of buffers to repopulate
- **/
- static void igbvf_alloc_rx_buffers(struct igbvf_ring *rx_ring,
- int cleaned_count)
- {
- struct igbvf_adapter *adapter = rx_ring->adapter;
- struct net_device *netdev = adapter->netdev;
- struct pci_dev *pdev = adapter->pdev;
- union e1000_adv_rx_desc *rx_desc;
- struct igbvf_buffer *buffer_info;
- struct sk_buff *skb;
- unsigned int i;
- int bufsz;
- i = rx_ring->next_to_use;
- buffer_info = &rx_ring->buffer_info[i];
- if (adapter->rx_ps_hdr_size)
- bufsz = adapter->rx_ps_hdr_size;
- else
- bufsz = adapter->rx_buffer_len;
- while (cleaned_count--) {
- rx_desc = IGBVF_RX_DESC_ADV(*rx_ring, i);
- if (adapter->rx_ps_hdr_size && !buffer_info->page_dma) {
- if (!buffer_info->page) {
- buffer_info->page = alloc_page(GFP_ATOMIC);
- if (!buffer_info->page) {
- adapter->alloc_rx_buff_failed++;
- goto no_buffers;
- }
- buffer_info->page_offset = 0;
- } else {
- buffer_info->page_offset ^= PAGE_SIZE / 2;
- }
- buffer_info->page_dma =
- dma_map_page(&pdev->dev, buffer_info->page,
- buffer_info->page_offset,
- PAGE_SIZE / 2,
- DMA_FROM_DEVICE);
- }
- if (!buffer_info->skb) {
- skb = netdev_alloc_skb_ip_align(netdev, bufsz);
- if (!skb) {
- adapter->alloc_rx_buff_failed++;
- goto no_buffers;
- }
- buffer_info->skb = skb;
- buffer_info->dma = dma_map_single(&pdev->dev, skb->data,
- bufsz,
- DMA_FROM_DEVICE);
- }
- /* Refresh the desc even if buffer_addrs didn't change because
- * each write-back erases this info. */
- if (adapter->rx_ps_hdr_size) {
- 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);
- rx_desc->read.hdr_addr = 0;
- }
- i++;
- if (i == rx_ring->count)
- i = 0;
- buffer_info = &rx_ring->buffer_info[i];
- }
- 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
- * applicable for weak-ordered memory model archs,
- * such as IA-64). */
- wmb();
- writel(i, adapter->hw.hw_addr + rx_ring->tail);
- }
- }
- /**
- * igbvf_clean_rx_irq - Send received data up the network stack; legacy
- * @adapter: board private structure
- *
- * the return value indicates whether actual cleaning was done, there
- * is no guarantee that everything was cleaned
- **/
- static bool igbvf_clean_rx_irq(struct igbvf_adapter *adapter,
- int *work_done, int work_to_do)
- {
- struct igbvf_ring *rx_ring = adapter->rx_ring;
- struct net_device *netdev = adapter->netdev;
- struct pci_dev *pdev = adapter->pdev;
- union e1000_adv_rx_desc *rx_desc, *next_rxd;
- struct igbvf_buffer *buffer_info, *next_buffer;
- struct sk_buff *skb;
- bool cleaned = false;
- int cleaned_count = 0;
- unsigned int total_bytes = 0, total_packets = 0;
- unsigned int i;
- u32 length, hlen, staterr;
- i = rx_ring->next_to_clean;
- rx_desc = IGBVF_RX_DESC_ADV(*rx_ring, i);
- staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
- while (staterr & E1000_RXD_STAT_DD) {
- if (*work_done >= work_to_do)
- break;
- (*work_done)++;
- rmb(); /* read descriptor and rx_buffer_info after status DD */
- buffer_info = &rx_ring->buffer_info[i];
- /* 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 fills the header buffer and spills the rest
- * into the page.
- */
- hlen = (le16_to_cpu(rx_desc->wb.lower.lo_dword.hs_rss.hdr_info) &
- E1000_RXDADV_HDRBUFLEN_MASK) >> E1000_RXDADV_HDRBUFLEN_SHIFT;
- if (hlen > adapter->rx_ps_hdr_size)
- hlen = adapter->rx_ps_hdr_size;
- length = le16_to_cpu(rx_desc->wb.upper.length);
- cleaned = true;
- cleaned_count++;
- skb = buffer_info->skb;
- prefetch(skb->data - NET_IP_ALIGN);
- buffer_info->skb = NULL;
- if (!adapter->rx_ps_hdr_size) {
- dma_unmap_single(&pdev->dev, buffer_info->dma,
- adapter->rx_buffer_len,
- DMA_FROM_DEVICE);
- buffer_info->dma = 0;
- skb_put(skb, length);
- goto send_up;
- }
- if (!skb_shinfo(skb)->nr_frags) {
- dma_unmap_single(&pdev->dev, buffer_info->dma,
- adapter->rx_ps_hdr_size,
- DMA_FROM_DEVICE);
- skb_put(skb, hlen);
- }
- if (length) {
- dma_unmap_page(&pdev->dev, buffer_info->page_dma,
- PAGE_SIZE / 2,
- DMA_FROM_DEVICE);
- buffer_info->page_dma = 0;
- skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
- buffer_info->page,
- buffer_info->page_offset,
- length);
- if ((adapter->rx_buffer_len > (PAGE_SIZE / 2)) ||
- (page_count(buffer_info->page) != 1))
- buffer_info->page = NULL;
- else
- get_page(buffer_info->page);
- skb->len += length;
- skb->data_len += length;
- skb->truesize += length;
- }
- send_up:
- i++;
- if (i == rx_ring->count)
- i = 0;
- next_rxd = IGBVF_RX_DESC_ADV(*rx_ring, i);
- prefetch(next_rxd);
- next_buffer = &rx_ring->buffer_info[i];
- if (!(staterr & E1000_RXD_STAT_EOP)) {
- buffer_info->skb = next_buffer->skb;
- buffer_info->dma = next_buffer->dma;
- next_buffer->skb = skb;
- next_buffer->dma = 0;
- goto next_desc;
- }
- if (staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) {
- dev_kfree_skb_irq(skb);
- goto next_desc;
- }
- total_bytes += skb->len;
- total_packets++;
- igbvf_rx_checksum_adv(adapter, staterr, skb);
- skb->protocol = eth_type_trans(skb, netdev);
- igbvf_receive_skb(adapter, netdev, skb, staterr,
- rx_desc->wb.upper.vlan);
- next_desc:
- rx_desc->wb.upper.status_error = 0;
- /* return some buffers to hardware, one at a time is too slow */
- if (cleaned_count >= IGBVF_RX_BUFFER_WRITE) {
- igbvf_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 = igbvf_desc_unused(rx_ring);
- if (cleaned_count)
- igbvf_alloc_rx_buffers(rx_ring, cleaned_count);
- adapter->total_rx_packets += total_packets;
- adapter->total_rx_bytes += total_bytes;
- adapter->net_stats.rx_bytes += total_bytes;
- adapter->net_stats.rx_packets += total_packets;
- return cleaned;
- }
- static void igbvf_put_txbuf(struct igbvf_adapter *adapter,
- struct igbvf_buffer *buffer_info)
- {
- if (buffer_info->dma) {
- if (buffer_info->mapped_as_page)
- dma_unmap_page(&adapter->pdev->dev,
- buffer_info->dma,
- buffer_info->length,
- DMA_TO_DEVICE);
- else
- dma_unmap_single(&adapter->pdev->dev,
- buffer_info->dma,
- buffer_info->length,
- DMA_TO_DEVICE);
- buffer_info->dma = 0;
- }
- if (buffer_info->skb) {
- dev_kfree_skb_any(buffer_info->skb);
- buffer_info->skb = NULL;
- }
- buffer_info->time_stamp = 0;
- }
- /**
- * igbvf_setup_tx_resources - allocate Tx resources (Descriptors)
- * @adapter: board private structure
- *
- * Return 0 on success, negative on failure
- **/
- int igbvf_setup_tx_resources(struct igbvf_adapter *adapter,
- struct igbvf_ring *tx_ring)
- {
- struct pci_dev *pdev = adapter->pdev;
- int size;
- size = sizeof(struct igbvf_buffer) * tx_ring->count;
- tx_ring->buffer_info = vzalloc(size);
- if (!tx_ring->buffer_info)
- goto err;
- /* round up to nearest 4K */
- tx_ring->size = tx_ring->count * sizeof(union e1000_adv_tx_desc);
- tx_ring->size = ALIGN(tx_ring->size, 4096);
- tx_ring->desc = dma_alloc_coherent(&pdev->dev, tx_ring->size,
- &tx_ring->dma, GFP_KERNEL);
- if (!tx_ring->desc)
- goto err;
- tx_ring->adapter = adapter;
- tx_ring->next_to_use = 0;
- tx_ring->next_to_clean = 0;
- return 0;
- err:
- vfree(tx_ring->buffer_info);
- dev_err(&adapter->pdev->dev,
- "Unable to allocate memory for the transmit descriptor ring\n");
- return -ENOMEM;
- }
- /**
- * igbvf_setup_rx_resources - allocate Rx resources (Descriptors)
- * @adapter: board private structure
- *
- * Returns 0 on success, negative on failure
- **/
- int igbvf_setup_rx_resources(struct igbvf_adapter *adapter,
- struct igbvf_ring *rx_ring)
- {
- struct pci_dev *pdev = adapter->pdev;
- int size, desc_len;
- size = sizeof(struct igbvf_buffer) * rx_ring->count;
- rx_ring->buffer_info = vzalloc(size);
- if (!rx_ring->buffer_info)
- goto err;
- desc_len = sizeof(union e1000_adv_rx_desc);
- /* Round up to nearest 4K */
- rx_ring->size = rx_ring->count * desc_len;
- rx_ring->size = ALIGN(rx_ring->size, 4096);
- rx_ring->desc = dma_alloc_coherent(&pdev->dev, rx_ring->size,
- &rx_ring->dma, GFP_KERNEL);
- if (!rx_ring->desc)
- goto err;
- rx_ring->next_to_clean = 0;
- rx_ring->next_to_use = 0;
- rx_ring->adapter = adapter;
- return 0;
- err:
- vfree(rx_ring->buffer_info);
- rx_ring->buffer_info = NULL;
- dev_err(&adapter->pdev->dev,
- "Unable to allocate memory for the receive descriptor ring\n");
- return -ENOMEM;
- }
- /**
- * igbvf_clean_tx_ring - Free Tx Buffers
- * @tx_ring: ring to be cleaned
- **/
- static void igbvf_clean_tx_ring(struct igbvf_ring *tx_ring)
- {
- struct igbvf_adapter *adapter = tx_ring->adapter;
- struct igbvf_buffer *buffer_info;
- unsigned long size;
- unsigned int i;
- if (!tx_ring->buffer_info)
- return;
- /* Free all the Tx ring sk_buffs */
- for (i = 0; i < tx_ring->count; i++) {
- buffer_info = &tx_ring->buffer_info[i];
- igbvf_put_txbuf(adapter, buffer_info);
- }
- size = sizeof(struct igbvf_buffer) * tx_ring->count;
- memset(tx_ring->buffer_info, 0, size);
- /* Zero out the descriptor ring */
- memset(tx_ring->desc, 0, tx_ring->size);
- tx_ring->next_to_use = 0;
- tx_ring->next_to_clean = 0;
- writel(0, adapter->hw.hw_addr + tx_ring->head);
- writel(0, adapter->hw.hw_addr + tx_ring->tail);
- }
- /**
- * igbvf_free_tx_resources - Free Tx Resources per Queue
- * @tx_ring: ring to free resources from
- *
- * Free all transmit software resources
- **/
- void igbvf_free_tx_resources(struct igbvf_ring *tx_ring)
- {
- struct pci_dev *pdev = tx_ring->adapter->pdev;
- igbvf_clean_tx_ring(tx_ring);
- vfree(tx_ring->buffer_info);
- tx_ring->buffer_info = NULL;
- dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
- tx_ring->dma);
- tx_ring->desc = NULL;
- }
- /**
- * igbvf_clean_rx_ring - Free Rx Buffers per Queue
- * @adapter: board private structure
- **/
- static void igbvf_clean_rx_ring(struct igbvf_ring *rx_ring)
- {
- struct igbvf_adapter *adapter = rx_ring->adapter;
- struct igbvf_buffer *buffer_info;
- struct pci_dev *pdev = adapter->pdev;
- unsigned long size;
- unsigned int 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];
- if (buffer_info->dma) {
- if (adapter->rx_ps_hdr_size){
- dma_unmap_single(&pdev->dev, buffer_info->dma,
- adapter->rx_ps_hdr_size,
- DMA_FROM_DEVICE);
- } else {
- dma_unmap_single(&pdev->dev, buffer_info->dma,
- adapter->rx_buffer_len,
- DMA_FROM_DEVICE);
- }
- buffer_info->dma = 0;
- }
- if (buffer_info->skb) {
- dev_kfree_skb(buffer_info->skb);
- buffer_info->skb = NULL;
- }
- if (buffer_info->page) {
- if (buffer_info->page_dma)
- dma_unmap_page(&pdev->dev,
- buffer_info->page_dma,
- PAGE_SIZE / 2,
- DMA_FROM_DEVICE);
- put_page(buffer_info->page);
- buffer_info->page = NULL;
- buffer_info->page_dma = 0;
- buffer_info->page_offset = 0;
- }
- }
- size = sizeof(struct igbvf_buffer) * rx_ring->count;
- memset(rx_ring->buffer_info, 0, size);
- /* Zero out the descriptor ring */
- memset(rx_ring->desc, 0, rx_ring->size);
- rx_ring->next_to_clean = 0;
- rx_ring->next_to_use = 0;
- writel(0, adapter->hw.hw_addr + rx_ring->head);
- writel(0, adapter->hw.hw_addr + rx_ring->tail);
- }
- /**
- * igbvf_free_rx_resources - Free Rx Resources
- * @rx_ring: ring to clean the resources from
- *
- * Free all receive software resources
- **/
- void igbvf_free_rx_resources(struct igbvf_ring *rx_ring)
- {
- struct pci_dev *pdev = rx_ring->adapter->pdev;
- igbvf_clean_rx_ring(rx_ring);
- vfree(rx_ring->buffer_info);
- rx_ring->buffer_info = NULL;
- dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
- rx_ring->dma);
- rx_ring->desc = NULL;
- }
- /**
- * igbvf_update_itr - update the dynamic ITR value based on statistics
- * @adapter: pointer to adapter
- * @itr_setting: current adapter->itr
- * @packets: the number of packets during this measurement interval
- * @bytes: the number of bytes during this measurement interval
- *
- * Stores a new ITR value based on packets and byte
- * counts during the last interrupt. The advantage of per interrupt
- * computation is faster updates and more accurate ITR for the current
- * traffic pattern. Constants in this function were computed
- * based on theoretical maximum wire speed and thresholds were set based
- * on testing data as well as attempting to minimize response time
- * while increasing bulk throughput. This functionality is controlled
- * by the InterruptThrottleRate module parameter.
- **/
- static unsigned int igbvf_update_itr(struct igbvf_adapter *adapter,
- u16 itr_setting, int packets,
- int bytes)
- {
- unsigned int retval = itr_setting;
- if (packets == 0)
- goto update_itr_done;
- switch (itr_setting) {
- case lowest_latency:
- /* handle TSO and jumbo frames */
- if (bytes/packets > 8000)
- retval = bulk_latency;
- else if ((packets < 5) && (bytes > 512))
- retval = low_latency;
- break;
- case low_latency: /* 50 usec aka 20000 ints/s */
- if (bytes > 10000) {
- /* this if handles the TSO accounting */
- if (bytes/packets > 8000)
- retval = bulk_latency;
- else if ((packets < 10) || ((bytes/packets) > 1200))
- retval = bulk_latency;
- else if ((packets > 35))
- retval = lowest_latency;
- } else if (bytes/packets > 2000) {
- retval = bulk_latency;
- } else if (packets <= 2 && bytes < 512) {
- retval = lowest_latency;
- }
- break;
- case bulk_latency: /* 250 usec aka 4000 ints/s */
- if (bytes > 25000) {
- if (packets > 35)
- retval = low_latency;
- } else if (bytes < 6000) {
- retval = low_latency;
- }
- break;
- }
- update_itr_done:
- return retval;
- }
- static void igbvf_set_itr(struct igbvf_adapter *adapter)
- {
- struct e1000_hw *hw = &adapter->hw;
- u16 current_itr;
- u32 new_itr = adapter->itr;
- adapter->tx_itr = igbvf_update_itr(adapter, adapter->tx_itr,
- adapter->total_tx_packets,
- adapter->total_tx_bytes);
- /* conservative mode (itr 3) eliminates the lowest_latency setting */
- if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
- adapter->tx_itr = low_latency;
- adapter->rx_itr = igbvf_update_itr(adapter, adapter->rx_itr,
- adapter->total_rx_packets,
- adapter->total_rx_bytes);
- /* conservative mode (itr 3) eliminates the lowest_latency setting */
- if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
- adapter->rx_itr = low_latency;
- current_itr = max(adapter->rx_itr, adapter->tx_itr);
- switch (current_itr) {
- /* counts and packets in update_itr are dependent on these numbers */
- case lowest_latency:
- new_itr = 70000;
- break;
- case low_latency:
- new_itr = 20000; /* aka hwitr = ~200 */
- break;
- case bulk_latency:
- new_itr = 4000;
- break;
- default:
- break;
- }
- if (new_itr != adapter->itr) {
- /*
- * this attempts to bias the interrupt rate towards Bulk
- * by adding intermediate steps when interrupt rate is
- * increasing
- */
- new_itr = new_itr > adapter->itr ?
- min(adapter->itr + (new_itr >> 2), new_itr) :
- new_itr;
- adapter->itr = new_itr;
- adapter->rx_ring->itr_val = 1952;
- if (adapter->msix_entries)
- adapter->rx_ring->set_itr = 1;
- else
- ew32(ITR, 1952);
- }
- }
- /**
- * igbvf_clean_tx_irq - Reclaim resources after transmit completes
- * @adapter: board private structure
- * returns true if ring is completely cleaned
- **/
- static bool igbvf_clean_tx_irq(struct igbvf_ring *tx_ring)
- {
- struct igbvf_adapter *adapter = tx_ring->adapter;
- struct net_device *netdev = adapter->netdev;
- struct igbvf_buffer *buffer_info;
- struct sk_buff *skb;
- union e1000_adv_tx_desc *tx_desc, *eop_desc;
- unsigned int total_bytes = 0, total_packets = 0;
- unsigned int i, eop, count = 0;
- bool cleaned = false;
- i = tx_ring->next_to_clean;
- eop = tx_ring->buffer_info[i].next_to_watch;
- eop_desc = IGBVF_TX_DESC_ADV(*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 = IGBVF_TX_DESC_ADV(*tx_ring, i);
- buffer_info = &tx_ring->buffer_info[i];
- cleaned = (i == eop);
- skb = buffer_info->skb;
- if (skb) {
- unsigned int segs, bytecount;
- /* gso_segs is currently only valid for tcp */
- segs = skb_shinfo(skb)->gso_segs ?: 1;
- /* multiply data chunks by size of headers */
- bytecount = ((segs - 1) * skb_headlen(skb)) +
- skb->len;
- total_packets += segs;
- total_bytes += bytecount;
- }
- igbvf_put_txbuf(adapter, buffer_info);
- tx_desc->wb.status = 0;
- i++;
- if (i == tx_ring->count)
- i = 0;
- }
- eop = tx_ring->buffer_info[i].next_to_watch;
- eop_desc = IGBVF_TX_DESC_ADV(*tx_ring, eop);
- }
- tx_ring->next_to_clean = i;
- if (unlikely(count &&
- netif_carrier_ok(netdev) &&
- igbvf_desc_unused(tx_ring) >= IGBVF_TX_QUEUE_WAKE)) {
- /* Make sure that anybody stopping the queue after this
- * sees the new next_to_clean.
- */
- smp_mb();
- if (netif_queue_stopped(netdev) &&
- !(test_bit(__IGBVF_DOWN, &adapter->state))) {
- netif_wake_queue(netdev);
- ++adapter->restart_queue;
- }
- }
- adapter->net_stats.tx_bytes += total_bytes;
- adapter->net_stats.tx_packets += total_packets;
- return count < tx_ring->count;
- }
- static irqreturn_t igbvf_msix_other(int irq, void *data)
- {
- struct net_device *netdev = data;
- struct igbvf_adapter *adapter = netdev_priv(netdev);
- struct e1000_hw *hw = &adapter->hw;
- adapter->int_counter1++;
- netif_carrier_off(netdev);
- hw->mac.get_link_status = 1;
- if (!test_bit(__IGBVF_DOWN, &adapter->state))
- mod_timer(&adapter->watchdog_timer, jiffies + 1);
- ew32(EIMS, adapter->eims_other);
- return IRQ_HANDLED;
- }
- static irqreturn_t igbvf_intr_msix_tx(int irq, void *data)
- {
- struct net_device *netdev = data;
- struct igbvf_adapter *adapter = netdev_priv(netdev);
- struct e1000_hw *hw = &adapter->hw;
- struct igbvf_ring *tx_ring = adapter->tx_ring;
- adapter->total_tx_bytes = 0;
- adapter->total_tx_packets = 0;
- /* auto mask will automatically reenable the interrupt when we write
- * EICS */
- if (!igbvf_clean_tx_irq(tx_ring))
- /* Ring was not completely cleaned, so fire another interrupt */
- ew32(EICS, tx_ring->eims_value);
- else
- ew32(EIMS, tx_ring->eims_value);
- return IRQ_HANDLED;
- }
- static irqreturn_t igbvf_intr_msix_rx(int irq, void *data)
- {
- struct net_device *netdev = data;
- struct igbvf_adapter *adapter = netdev_priv(netdev);
- adapter->int_counter0++;
- /* Write the ITR value calculated at the end of the
- * previous interrupt.
- */
- if (adapter->rx_ring->set_itr) {
- writel(adapter->rx_ring->itr_val,
- adapter->hw.hw_addr + adapter->rx_ring->itr_register);
- adapter->rx_ring->set_itr = 0;
- }
- if (napi_schedule_prep(&adapter->rx_ring->napi)) {
- adapter->total_rx_bytes = 0;
- adapter->total_rx_packets = 0;
- __napi_schedule(&adapter->rx_ring->napi);
- }
- return IRQ_HANDLED;
- }
- #define IGBVF_NO_QUEUE -1
- static void igbvf_assign_vector(struct igbvf_adapter *adapter, int rx_queue,
- int tx_queue, int msix_vector)
- {
- struct e1000_hw *hw = &adapter->hw;
- u32 ivar, index;
- /* 82576 uses a table-based method for assigning vectors.
- Each queue has a single entry in the table to which we write
- a vector number along with a "valid" bit. Sadly, the layout
- of the table is somewhat counterintuitive. */
- if (rx_queue > IGBVF_NO_QUEUE) {
- index = (rx_queue >> 1);
- ivar = array_er32(IVAR0, index);
- if (rx_queue & 0x1) {
- /* vector goes into third byte of register */
- ivar = ivar & 0xFF00FFFF;
- ivar |= (msix_vector | E1000_IVAR_VALID) << 16;
- } else {
- /* vector goes into low byte of register */
- ivar = ivar & 0xFFFFFF00;
- ivar |= msix_vector | E1000_IVAR_VALID;
- }
- adapter->rx_ring[rx_queue].eims_value = 1 << msix_vector;
- array_ew32(IVAR0, index, ivar);
- }
- if (tx_queue > IGBVF_NO_QUEUE) {
- index = (tx_queue >> 1);
- ivar = array_er32(IVAR0, index);
- if (tx_queue & 0x1) {
- /* vector goes into high byte of register */
- ivar = ivar & 0x00FFFFFF;
- ivar |= (msix_vector | E1000_IVAR_VALID) << 24;
- } else {
- /* vector goes into second byte of register */
- ivar = ivar & 0xFFFF00FF;
- ivar |= (msix_vector | E1000_IVAR_VALID) << 8;
- }
- adapter->tx_ring[tx_queue].eims_value = 1 << msix_vector;
- array_ew32(IVAR0, index, ivar);
- }
- }
- /**
- * igbvf_configure_msix - Configure MSI-X hardware
- *
- * igbvf_configure_msix sets up the hardware to properly
- * generate MSI-X interrupts.
- **/
- static void igbvf_configure_msix(struct igbvf_adapter *adapter)
- {
- u32 tmp;
- struct e1000_hw *hw = &adapter->hw;
- struct igbvf_ring *tx_ring = adapter->tx_ring;
- struct igbvf_ring *rx_ring = adapter->rx_ring;
- int vector = 0;
- adapter->eims_enable_mask = 0;
- igbvf_assign_vector(adapter, IGBVF_NO_QUEUE, 0, vector++);
- adapter->eims_enable_mask |= tx_ring->eims_value;
- if (tx_ring->itr_val)
- writel(tx_ring->itr_val,
- hw->hw_addr + tx_ring->itr_register);
- else
- writel(1952, hw->hw_addr + tx_ring->itr_register);
- igbvf_assign_vector(adapter, 0, IGBVF_NO_QUEUE, vector++);
- adapter->eims_enable_mask |= rx_ring->eims_value;
- if (rx_ring->itr_val)
- writel(rx_ring->itr_val,
- hw->hw_addr + rx_ring->itr_register);
- else
- writel(1952, hw->hw_addr + rx_ring->itr_register);
- /* set vector for other causes, i.e. link changes */
- tmp = (vector++ | E1000_IVAR_VALID);
- ew32(IVAR_MISC, tmp);
- adapter->eims_enable_mask = (1 << (vector)) - 1;
- adapter->eims_other = 1 << (vector - 1);
- e1e_flush();
- }
- static void igbvf_reset_interrupt_capability(struct igbvf_adapter *adapter)
- {
- if (adapter->msix_entries) {
- pci_disable_msix(adapter->pdev);
- kfree(adapter->msix_entries);
- adapter->msix_entries = NULL;
- }
- }
- /**
- * igbvf_set_interrupt_capability - set MSI or MSI-X if supported
- *
- * Attempt to configure interrupts using the best available
- * capabilities of the hardware and kernel.
- **/
- static void igbvf_set_interrupt_capability(struct igbvf_adapter *adapter)
- {
- int err = -ENOMEM;
- int i;
- /* we allocate 3 vectors, 1 for tx, 1 for rx, one for pf messages */
- adapter->msix_entries = kcalloc(3, sizeof(struct msix_entry),
- GFP_KERNEL);
- if (adapter->msix_entries) {
- for (i = 0; i < 3; i++)
- adapter->msix_entries[i].entry = i;
- err = pci_enable_msix(adapter->pdev,
- adapter->msix_entries, 3);
- }
- if (err) {
- /* MSI-X failed */
- dev_err(&adapter->pdev->dev,
- "Failed to initialize MSI-X interrupts.\n");
- igbvf_reset_interrupt_capability(adapter);
- }
- }
- /**
- * igbvf_request_msix - Initialize MSI-X interrupts
- *
- * igbvf_request_msix allocates MSI-X vectors and requests interrupts from the
- * kernel.
- **/
- static int igbvf_request_msix(struct igbvf_adapter *adapter)
- {
- struct net_device *netdev = adapter->netdev;
- int err = 0, vector = 0;
- if (strlen(netdev->name) < (IFNAMSIZ - 5)) {
- sprintf(adapter->tx_ring->name, "%s-tx-0", netdev->name);
- sprintf(adapter->rx_ring->name, "%s-rx-0", netdev->name);
- } else {
- memcpy(adapter->tx_ring->name, netdev->name, IFNAMSIZ);
- memcpy(adapter->rx_ring->name, netdev->name, IFNAMSIZ);
- }
- err = request_irq(adapter->msix_entries[vector].vector,
- igbvf_intr_msix_tx, 0, adapter->tx_ring->name,
- netdev);
- if (err)
- goto out;
- adapter->tx_ring->itr_register = E1000_EITR(vector);
- adapter->tx_ring->itr_val = 1952;
- vector++;
- err = request_irq(adapter->msix_entries[vector].vector,
- igbvf_intr_msix_rx, 0, adapter->rx_ring->name,
- netdev);
- if (err)
- goto out;
- adapter->rx_ring->itr_register = E1000_EITR(vector);
- adapter->rx_ring->itr_val = 1952;
- vector++;
- err = request_irq(adapter->msix_entries[vector].vector,
- igbvf_msix_other, 0, netdev->name, netdev);
- if (err)
- goto out;
- igbvf_configure_msix(adapter);
- return 0;
- out:
- return err;
- }
- /**
- * igbvf_alloc_queues - Allocate memory for all rings
- * @adapter: board private structure to initialize
- **/
- static int __devinit igbvf_alloc_queues(struct igbvf_adapter *adapter)
- {
- struct net_device *netdev = adapter->netdev;
- adapter->tx_ring = kzalloc(sizeof(struct igbvf_ring), GFP_KERNEL);
- if (!adapter->tx_ring)
- return -ENOMEM;
- adapter->rx_ring = kzalloc(sizeof(struct igbvf_ring), GFP_KERNEL);
- if (!adapter->rx_ring) {
- kfree(adapter->tx_ring);
- return -ENOMEM;
- }
- netif_napi_add(netdev, &adapter->rx_ring->napi, igbvf_poll, 64);
- return 0;
- }
- /**
- * igbvf_request_irq - initialize interrupts
- *
- * Attempts to configure interrupts using the best available
- * capabilities of the hardware and kernel.
- **/
- static int igbvf_request_irq(struct igbvf_adapter *adapter)
- {
- int err = -1;
- /* igbvf supports msi-x only */
- if (adapter->msix_entries)
- err = igbvf_request_msix(adapter);
- if (!err)
- return err;
- dev_err(&adapter->pdev->dev,
- "Unable to allocate interrupt, Error: %d\n", err);
- return err;
- }
- static void igbvf_free_irq(struct igbvf_adapter *adapter)
- {
- struct net_device *netdev = adapter->netdev;
- int vector;
- if (adapter->msix_entries) {
- for (vector = 0; vector < 3; vector++)
- free_irq(adapter->msix_entries[vector].vector, netdev);
- }
- }
- /**
- * igbvf_irq_disable - Mask off interrupt generation on the NIC
- **/
- static void igbvf_irq_disable(struct igbvf_adapter *adapter)
- {
- struct e1000_hw *hw = &adapter->hw;
- ew32(EIMC, ~0);
- if (adapter->msix_entries)
- ew32(EIAC, 0);
- }
- /**
- * igbvf_irq_enable - Enable default interrupt generation settings
- **/
- static void igbvf_irq_enable(struct igbvf_adapter *adapter)
- {
- struct e1000_hw *hw = &adapter->hw;
- ew32(EIAC, adapter->eims_enable_mask);
- ew32(EIAM, adapter->eims_enable_mask);
- ew32(EIMS, adapter->eims_enable_mask);
- }
- /**
- * igbvf_poll - NAPI Rx polling callback
- * @napi: struct associated with this polling callback
- * @budget: amount of packets driver is allowed to process this poll
- **/
- static int igbvf_poll(struct napi_struct *napi, int budget)
- {
- struct igbvf_ring *rx_ring = container_of(napi, struct igbvf_ring, napi);
- struct igbvf_adapter *adapter = rx_ring->adapter;
- struct e1000_hw *hw = &adapter->hw;
- int work_done = 0;
- igbvf_clean_rx_irq(adapter, &work_done, budget);
- /* If not enough Rx work done, exit the polling mode */
- if (work_done < budget) {
- napi_complete(napi);
- if (adapter->itr_setting & 3)
- igbvf_set_itr(adapter);
- if (!test_bit(__IGBVF_DOWN, &adapter->state))
- ew32(EIMS, adapter->rx_ring->eims_value);
- }
- return work_done;
- }
- /**
- * igbvf_set_rlpml - set receive large packet maximum length
- * @adapter: board private structure
- *
- * Configure the maximum size of packets that will be received
- */
- static void igbvf_set_rlpml(struct igbvf_adapter *adapter)
- {
- int max_frame_size = adapter->max_frame_size;
- struct e1000_hw *hw = &adapter->hw;
- if (adapter->vlgrp)
- max_frame_size += VLAN_TAG_SIZE;
- e1000_rlpml_set_vf(hw, max_frame_size);
- }
- static void igbvf_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
- {
- struct igbvf_adapter *adapter = netdev_priv(netdev);
- struct e1000_hw *hw = &adapter->hw;
- if (hw->mac.ops.set_vfta(hw, vid, true))
- dev_err(&adapter->pdev->dev, "Failed to add vlan id %d\n", vid);
- }
- static void igbvf_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
- {
- struct igbvf_adapter *adapter = netdev_priv(netdev);
- struct e1000_hw *hw = &adapter->hw;
- igbvf_irq_disable(adapter);
- vlan_group_set_device(adapter->vlgrp, vid, NULL);
- if (!test_bit(__IGBVF_DOWN, &adapter->state))
- igbvf_irq_enable(adapter);
- if (hw->mac.ops.set_vfta(hw, vid, false))
- dev_err(&adapter->pdev->dev,
- "Failed to remove vlan id %d\n", vid);
- }
- static void igbvf_vlan_rx_register(struct net_device *netdev,
- struct vlan_group *grp)
- {
- struct igbvf_adapter *adapter = netdev_priv(netdev);
- adapter->vlgrp = grp;
- }
- static void igbvf_restore_vlan(struct igbvf_adapter *adapter)
- {
- u16 vid;
- if (!adapter->vlgrp)
- return;
- for (vid = 0; vid < VLAN_N_VID; vid++) {
- if (!vlan_group_get_device(adapter->vlgrp, vid))
- continue;
- igbvf_vlan_rx_add_vid(adapter->netdev, vid);
- }
- igbvf_set_rlpml(adapter);
- }
- /**
- * igbvf_configure_tx - Configure Transmit Unit after Reset
- * @adapter: board private structure
- *
- * Configure the Tx unit of the MAC after a reset.
- **/
- static void igbvf_configure_tx(struct igbvf_adapter *adapter)
- {
- struct e1000_hw *hw = &adapter->hw;
- struct igbvf_ring *tx_ring = adapter->tx_ring;
- u64 tdba;
- u32 txdctl, dca_txctrl;
- /* disable transmits */
- txdctl = er32(TXDCTL(0));
- ew32(TXDCTL(0), txdctl & ~E1000_TXDCTL_QUEUE_ENABLE);
- msleep(10);
- /* Setup the HW Tx Head and Tail descriptor pointers */
- ew32(TDLEN(0), tx_ring->count * sizeof(union e1000_adv_tx_desc));
- tdba = tx_ring->dma;
- ew32(TDBAL(0), (tdba & DMA_BIT_MASK(32)));
- ew32(TDBAH(0), (tdba >> 32));
- ew32(TDH(0), 0);
- ew32(TDT(0), 0);
- tx_ring->head = E1000_TDH(0);
- tx_ring->tail = E1000_TDT(0);
- /* Turn off Relaxed Ordering on head write-backs. The writebacks
- * MUST be delivered in order or it will completely screw up
- * our bookeeping.
- */
- dca_txctrl = er32(DCA_TXCTRL(0));
- dca_txctrl &= ~E1000_DCA_TXCTRL_TX_WB_RO_EN;
- ew32(DCA_TXCTRL(0), dca_txctrl);
- /* enable transmits */
- txdctl |= E1000_TXDCTL_QUEUE_ENABLE;
- ew32(TXDCTL(0), txdctl);
- /* Setup Transmit Descriptor Settings for eop descriptor */
- adapter->txd_cmd = E1000_ADVTXD_DCMD_EOP | E1000_ADVTXD_DCMD_IFCS;
- /* enable Report Status bit */
- adapter->txd_cmd |= E1000_ADVTXD_DCMD_RS;
- }
- /**
- * igbvf_setup_srrctl - configure the receive control registers
- * @adapter: Board private structure
- **/
- static void igbvf_setup_srrctl(struct igbvf_adapter *adapter)
- {
- struct e1000_hw *hw = &adapter->hw;
- u32 srrctl = 0;
- srrctl &= ~(E1000_SRRCTL_DESCTYPE_MASK |
- E1000_SRRCTL_BSIZEHDR_MASK |
- E1000_SRRCTL_BSIZEPKT_MASK);
- /* Enable queue drop to avoid head of line blocking */
- srrctl |= E1000_SRRCTL_DROP_EN;
- /* Setup buffer sizes */
- srrctl |= ALIGN(adapter->rx_buffer_len, 1024) >>
- E1000_SRRCTL_BSIZEPKT_SHIFT;
- if (adapter->rx_buffer_len < 2048) {
- adapter->rx_ps_hdr_size = 0;
- srrctl |= E1000_SRRCTL_DESCTYPE_ADV_ONEBUF;
- } else {
- adapter->rx_ps_hdr_size = 128;
- srrctl |= adapter->rx_ps_hdr_size <<
- E1000_SRRCTL_BSIZEHDRSIZE_SHIFT;
- srrctl |= E1000_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS;
- }
- ew32(SRRCTL(0), srrctl);
- }
- /**
- * igbvf_configure_rx - Configure Receive Unit after Reset
- * @adapter: board private structure
- *
- * Configure the Rx unit of the MAC after a reset.
- **/
- static void igbvf_configure_rx(struct igbvf_adapter *adapter)
- {
- struct e1000_hw *hw = &adapter->hw;
- struct igbvf_ring *rx_ring = adapter->rx_ring;
- u64 rdba;
- u32 rdlen, rxdctl;
- /* disable receives */
- rxdctl = er32(RXDCTL(0));
- ew32(RXDCTL(0), rxdctl & ~E1000_RXDCTL_QUEUE_ENABLE);
- msleep(10);
- rdlen = rx_ring->count * sizeof(union e1000_adv_rx_desc);
- /*
- * Setup the HW Rx Head and Tail Descriptor Pointers and
- * the Base and Length of the Rx Descriptor Ring
- */
- rdba = rx_ring->dma;
- ew32(RDBAL(0), (rdba & DMA_BIT_MASK(32)));
- ew32(RDBAH(0), (rdba >> 32));
- ew32(RDLEN(0), rx_ring->count * sizeof(union e1000_adv_rx_desc));
- rx_ring->head = E1000_RDH(0);
- rx_ring->tail = E1000_RDT(0);
- ew32(RDH(0), 0);
- ew32(RDT(0), 0);
- rxdctl |= E1000_RXDCTL_QUEUE_ENABLE;
- rxdctl &= 0xFFF00000;
- rxdctl |= IGBVF_RX_PTHRESH;
- rxdctl |= IGBVF_RX_HTHRESH << 8;
- rxdctl |= IGBVF_RX_WTHRESH << 16;
- igbvf_set_rlpml(adapter);
- /* enable receives */
- ew32(RXDCTL(0), rxdctl);
- }
- /**
- * igbvf_set_multi - Multicast and Promiscuous mode set
- * @netdev: network interface device structure
- *
- * The set_multi entry point is called whenever the multicast address
- * list or the network interface flags are updated. This routine is
- * responsible for configuring the hardware for proper multicast,
- * promiscuous mode, and all-multi behavior.
- **/
- static void igbvf_set_multi(struct net_device *netdev)
- {
- struct igbvf_adapter *adapter = netdev_priv(netdev);
- struct e1000_hw *hw = &adapter->hw;
- struct netdev_hw_addr *ha;
- u8 *mta_list = NULL;
- int i;
- if (!netdev_mc_empty(netdev)) {
- mta_list = kmalloc(netdev_mc_count(netdev) * 6, GFP_ATOMIC);
- if (!mta_list) {
- dev_err(&adapter->pdev->dev,
- "failed to allocate multicast filter list\n");
- return;
- }
- }
- /* prepare a packed array of only addresses. */
- i = 0;
- netdev_for_each_mc_addr(ha, netdev)
- memcpy(mta_list + (i++ * ETH_ALEN), ha->addr, ETH_ALEN);
- hw->mac.ops.update_mc_addr_list(hw, mta_list, i, 0, 0);
- kfree(mta_list);
- }
- /**
- * igbvf_configure - configure the hardware for Rx and Tx
- * @adapter: private board structure
- **/
- static void igbvf_configure(struct igbvf_adapter *adapter)
- {
- igbvf_set_multi(adapter->netdev);
- igbvf_restore_vlan(adapter);
- igbvf_configure_tx(adapter);
- igbvf_setup_srrctl(adapter);
- igbvf_configure_rx(adapter);
- igbvf_alloc_rx_buffers(adapter->rx_ring,
- igbvf_desc_unused(adapter->rx_ring));
- }
- /* igbvf_reset - bring the hardware into a known good state
- *
- * This function boots the hardware and enables some settings that
- * require a configuration cycle of the hardware - those cannot be
- * set/changed during runtime. After reset the device needs to be
- * properly configured for Rx, Tx etc.
- */
- static void igbvf_reset(struct igbvf_adapter *adapter)
- {
- struct e1000_mac_info *mac = &adapter->hw.mac;
- struct net_device *netdev = adapter->netdev;
- struct e1000_hw *hw = &adapter->hw;
- /* Allow time for pending master requests to run */
- if (mac->ops.reset_hw(hw))
- dev_err(&adapter->pdev->dev, "PF still resetting\n");
- mac->ops.init_hw(hw);
- if (is_valid_ether_addr(adapter->hw.mac.addr)) {
- memcpy(netdev->dev_addr, adapter->hw.mac.addr,
- netdev->addr_len);
- memcpy(netdev->perm_addr, adapter->hw.mac.addr,
- netdev->addr_len);
- }
- adapter->last_reset = jiffies;
- }
- int igbvf_up(struct igbvf_adapter *adapter)
- {
- struct e1000_hw *hw = &adapter->hw;
- /* hardware has been reset, we need to reload some things */
- igbvf_configure(adapter);
- clear_bit(__IGBVF_DOWN, &adapter->state);
- napi_enable(&adapter->rx_ring->napi);
- if (adapter->msix_entries)
- igbvf_configure_msix(adapter);
- /* Clear any pending interrupts. */
- er32(EICR);
- igbvf_irq_enable(adapter);
- /* start the watchdog */
- hw->mac.get_link_status = 1;
- mod_timer(&adapter->watchdog_timer, jiffies + 1);
- return 0;
- }
- void igbvf_down(struct igbvf_adapter *adapter)
- {
- struct net_device *netdev = adapter->netdev;
- struct e1000_hw *hw = &adapter->hw;
- u32 rxdctl, txdctl;
- /*
- * signal that we're down so the interrupt handler does not
- * reschedule our watchdog timer
- */
- set_bit(__IGBVF_DOWN, &adapter->state);
- /* disable receives in the hardware */
- rxdctl = er32(RXDCTL(0));
- ew32(RXDCTL(0), rxdctl & ~E1000_RXDCTL_QUEUE_ENABLE);
- netif_stop_queue(netdev);
- /* disable transmits in the hardware */
- txdctl = er32(TXDCTL(0));
- ew32(TXDCTL(0), txdctl & ~E1000_TXDCTL_QUEUE_ENABLE);
- /* flush both disables and wait for them to finish */
- e1e_flush();
- msleep(10);
- napi_disable(&adapter->rx_ring->napi);
- igbvf_irq_disable(adapter);
- del_timer_sync(&adapter->watchdog_timer);
- netif_carrier_off(netdev);
- /* record the stats before reset*/
- igbvf_update_stats(adapter);
- adapter->link_speed = 0;
- adapter->link_duplex = 0;
- igbvf_reset(adapter);
- igbvf_clean_tx_ring(adapter->tx_ring);
- igbvf_clean_rx_ring(adapter->rx_ring);
- }
- void igbvf_reinit_locked(struct igbvf_adapter *adapter)
- {
- might_sleep();
- while (test_and_set_bit(__IGBVF_RESETTING, &adapter->state))
- msleep(1);
- igbvf_down(adapter);
- igbvf_up(adapter);
- clear_bit(__IGBVF_RESETTING, &adapter->state);
- }
- /**
- * igbvf_sw_init - Initialize general software structures (struct igbvf_adapter)
- * @adapter: board private structure to initialize
- *
- * igbvf_sw_init initializes the Adapter private data structure.
- * Fields are initialized based on PCI device information and
- * OS network device settings (MTU size).
- **/
- static int __devinit igbvf_sw_init(struct igbvf_adapter *adapter)
- {
- struct net_device *netdev = adapter->netdev;
- s32 rc;
- adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN;
- adapter->rx_ps_hdr_size = 0;
- adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
- adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN;
- adapter->tx_int_delay = 8;
- adapter->tx_abs_int_delay = 32;
- adapter->rx_int_delay = 0;
- adapter->rx_abs_int_delay = 8;
- adapter->itr_setting = 3;
- adapter->itr = 20000;
- /* Set various function pointers */
- adapter->ei->init_ops(&adapter->hw);
- rc = adapter->hw.mac.ops.init_params(&adapter->hw);
- if (rc)
- return rc;
- rc = adapter->hw.mbx.ops.init_params(&adapter->hw);
- if (rc)
- return rc;
- igbvf_set_interrupt_capability(adapter);
- if (igbvf_alloc_queues(adapter))
- return -ENOMEM;
- spin_lock_init(&adapter->tx_queue_lock);
- /* Explicitly disable IRQ since the NIC can be in any state. */
- igbvf_irq_disable(adapter);
- spin_lock_init(&adapter->stats_lock);
- set_bit(__IGBVF_DOWN, &adapter->state);
- return 0;
- }
- static void igbvf_initialize_last_counter_stats(struct igbvf_adapter *adapter)
- {
- struct e1000_hw *hw = &adapter->hw;
- adapter->stats.last_gprc = er32(VFGPRC);
- adapter->stats.last_gorc = er32(VFGORC);
- adapter->stats.last_gptc = er32(VFGPTC);
- adapter->stats.last_gotc = er32(VFGOTC);
- adapter->stats.last_mprc = er32(VFMPRC);
- adapter->stats.last_gotlbc = er32(VFGOTLBC);
- adapter->stats.last_gptlbc = er32(VFGPTLBC);
- adapter->stats.last_gorlbc = er32(VFGORLBC);
- adapter->stats.last_gprlbc = er32(VFGPRLBC);
- adapter->stats.base_gprc = er32(VFGPRC);
- adapter->stats.base_gorc = er32(VFGORC);
- adapter->stats.base_gptc = er32(VFGPTC);
- adapter->stats.base_gotc = er32(VFGOTC);
- adapter->stats.base_mprc = er32(VFMPRC);
- adapter->stats.base_gotlbc = er32(VFGOTLBC);
- adapter->stats.base_gptlbc = er32(VFGPTLBC);
- adapter->stats.base_gorlbc = er32(VFGORLBC);
- adapter->stats.base_gprlbc = er32(VFGPRLBC);
- }
- /**
- * igbvf_open - Called when a network interface is made active
- * @netdev: network interface device structure
- *
- * Returns 0 on success, negative value on failure
- *
- * The open entry point is called when a network interface is made
- * active by the system (IFF_UP). At this point all resources needed
- * for transmit and receive operations are allocated, the interrupt
- * handler is registered with the OS, the watchdog timer is started,
- * and the stack is notified that the interface is ready.
- **/
- static int igbvf_open(struct net_device *netdev)
- {
- struct igbvf_adapter *adapter = netdev_priv(netdev);
- struct e1000_hw *hw = &adapter->hw;
- int err;
- /* disallow open during test */
- if (test_bit(__IGBVF_TESTING, &adapter->state))
- return -EBUSY;
- /* allocate transmit descriptors */
- err = igbvf_setup_tx_resources(adapter, adapter->tx_ring);
- if (err)
- goto err_setup_tx;
- /* allocate receive descriptors */
- err = igbvf_setup_rx_resources(adapter, adapter->rx_ring);
- if (err)
- goto err_setup_rx;
- /*
- * before we allocate an interrupt, we must be ready to handle it.
- * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
- * as soon as we call pci_request_irq, so we have to setup our
- * clean_rx handler before we do so.
- */
- igbvf_configure(adapter);
- err = igbvf_request_irq(adapter);
- if (err)
- goto err_req_irq;
- /* From here on the code is the same as igbvf_up() */
- clear_bit(__IGBVF_DOWN, &adapter->state);
- napi_enable(&adapter->rx_ring->napi);
- /* clear any pending interrupts */
- er32(EICR);
- igbvf_irq_enable(adapter);
- /* start the watchdog */
- hw->mac.get_link_status = 1;
- mod_timer(&adapter->watchdog_timer, jiffies + 1);
- return 0;
- err_req_irq:
- igbvf_free_rx_resources(adapter->rx_ring);
- err_setup_rx:
- igbvf_free_tx_resources(adapter->tx_ring);
- err_setup_tx:
- igbvf_reset(adapter);
- return err;
- }
- /**
- * igbvf_close - Disables a network interface
- * @netdev: network interface device structure
- *
- * Returns 0, this is not allowed to fail
- *
- * The close entry point is called when an interface is de-activated
- * by the OS. The hardware is still under the drivers control, but
- * needs to be disabled. A global MAC reset is issued to stop the
- * hardware, and all transmit and receive resources are freed.
- **/
- static int igbvf_close(struct net_device *netdev)
- {
- struct igbvf_adapter *adapter = netdev_priv(netdev);
- WARN_ON(test_bit(__IGBVF_RESETTING, &adapter->state));
- igbvf_down(adapter);
- igbvf_free_irq(adapter);
- igbvf_free_tx_resources(adapter->tx_ring);
- igbvf_free_rx_resources(adapter->rx_ring);
- return 0;
- }
- /**
- * igbvf_set_mac - Change the Ethernet Address of the NIC
- * @netdev: network interface device structure
- * @p: pointer to an address structure
- *
- * Returns 0 on success, negative on failure
- **/
- static int igbvf_set_mac(struct net_device *netdev, void *p)
- {
- struct igbvf_adapter *adapter = netdev_priv(netdev);
- struct e1000_hw *hw = &adapter->hw;
- struct sockaddr *addr = p;
- if (!is_valid_ether_addr(addr->sa_data))
- return -EADDRNOTAVAIL;
- memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
- hw->mac.ops.rar_set(hw, hw->mac.addr, 0);
- if (memcmp(addr->sa_data, hw->mac.addr, 6))
- return -EADDRNOTAVAIL;
- memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
- return 0;
- }
- #define UPDATE_VF_COUNTER(reg, name) \
- { \
- u32 current_counter = er32(reg); \
- if (current_counter < adapter->stats.last_##name) \
- adapter->stats.name += 0x100000000LL; \
- adapter->stats.last_##name = current_counter; \
- adapter->stats.name &= 0xFFFFFFFF00000000LL; \
- adapter->stats.name |= current_counter; \
- }
- /**
- * igbvf_update_stats - Update the board statistics counters
- * @adapter: board private structure
- **/
- void igbvf_update_stats(struct igbvf_adapter *adapter)
- {
- struct e1000_hw *hw = &adapter->hw;
- struct pci_dev *pdev = adapter->pdev;
- /*
- * Prevent stats update while adapter is being reset, link is down
- * or if the pci connection is down.
- */
- if (adapter->link_speed == 0)
- return;
- if (test_bit(__IGBVF_RESETTING, &adapter->state))
- return;
- if (pci_channel_offline(pdev))
- return;
- UPDATE_VF_COUNTER(VFGPRC, gprc);
- UPDATE_VF_COUNTER(VFGORC, gorc);
- UPDATE_VF_COUNTER(VFGPTC, gptc);
- UPDATE_VF_COUNTER(VFGOTC, gotc);
- UPDATE_VF_COUNTER(VFMPRC, mprc);
- UPDATE_VF_COUNTER(VFGOTLBC, gotlbc);
- UPDATE_VF_COUNTER(VFGPTLBC, gptlbc);
- UPDATE_VF_COUNTER(VFGORLBC, gorlbc);
- UPDATE_VF_COUNTER(VFGPRLBC, gprlbc);
- /* Fill out the OS statistics structure */
- adapter->net_stats.multicast = adapter->stats.mprc;
- }
- static void igbvf_print_link_info(struct igbvf_adapter *adapter)
- {
- dev_info(&adapter->pdev->dev, "Link is Up %d Mbps %s\n",
- adapter->link_speed,
- ((adapter->link_duplex == FULL_DUPLEX) ?
- "Full Duplex" : "Half Duplex"));
- }
- static bool igbvf_has_link(struct igbvf_adapter *adapter)
- {
- struct e1000_hw *hw = &adapter->hw;
- s32 ret_val = E1000_SUCCESS;
- bool link_active;
- /* If interface is down, stay link down */
- if (test_bit(__IGBVF_DOWN, &adapter->state))
- return false;
- ret_val = hw->mac.ops.check_for_link(hw);
- link_active = !hw->mac.get_link_status;
- /* if check for link returns error we will need to reset */
- if (ret_val && time_after(jiffies, adapter->last_reset + (10 * HZ)))
- schedule_work(&adapter->reset_task);
- return link_active;
- }
- /**
- * igbvf_watchdog - Timer Call-back
- * @data: pointer to adapter cast into an unsigned long
- **/
- static void igbvf_watchdog(unsigned long data)
- {
- struct igbvf_adapter *adapter = (struct igbvf_adapter *) data;
- /* Do the rest outside of interrupt context */
- schedule_work(&adapter->watchdog_task);
- }
- static void igbvf_watchdog_task(struct work_struct *work)
- {
- struct igbvf_adapter *adapter = container_of(work,
- struct igbvf_adapter,
- watchdog_task);
- struct net_device *netdev = adapter->netdev;
- struct e1000_mac_info *mac = &adapter->hw.mac;
- struct igbvf_ring *tx_ring = adapter->tx_ring;
- struct e1000_hw *hw = &adapter->hw;
- u32 link;
- int tx_pending = 0;
- link = igbvf_has_link(adapter);
- if (link) {
- if (!netif_carrier_ok(netdev)) {
- mac->ops.get_link_up_info(&adapter->hw,
- &adapter->link_speed,
- &…