| /******************************************************************************* |
| |
| Intel(R) 82576 Virtual Function Linux driver |
| Copyright(c) 2009 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 <net/checksum.h> |
| #include <net/ip6_checksum.h> |
| #include <linux/mii.h> |
| #include <linux/ethtool.h> |
| #include <linux/if_vlan.h> |
| #include <linux/pm_qos_params.h> |
| |
| #include "igbvf.h" |
| |
| #define DRV_VERSION "1.0.0-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 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 const struct igbvf_info *igbvf_info_tbl[] = { |
| [board_vf] = &igbvf_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->ip_summed = CHECKSUM_NONE; |
| |
| /* 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 = |
| pci_map_page(pdev, buffer_info->page, |
| buffer_info->page_offset, |
| PAGE_SIZE / 2, |
| PCI_DMA_FROMDEVICE); |
| } |
| |
| 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 = pci_map_single(pdev, skb->data, |
| bufsz, |
| PCI_DMA_FROMDEVICE); |
| } |
| /* 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)++; |
| |
| 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) { |
| pci_unmap_single(pdev, buffer_info->dma, |
| adapter->rx_buffer_len, |
| PCI_DMA_FROMDEVICE); |
| buffer_info->dma = 0; |
| skb_put(skb, length); |
| goto send_up; |
| } |
| |
| if (!skb_shinfo(skb)->nr_frags) { |
| pci_unmap_single(pdev, buffer_info->dma, |
| adapter->rx_ps_hdr_size, |
| PCI_DMA_FROMDEVICE); |
| skb_put(skb, hlen); |
| } |
| |
| if (length) { |
| pci_unmap_page(pdev, buffer_info->page_dma, |
| PAGE_SIZE / 2, |
| PCI_DMA_FROMDEVICE); |
| 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) |
| { |
| buffer_info->dma = 0; |
| if (buffer_info->skb) { |
| skb_dma_unmap(&adapter->pdev->dev, buffer_info->skb, |
| DMA_TO_DEVICE); |
| dev_kfree_skb_any(buffer_info->skb); |
| buffer_info->skb = NULL; |
| } |
| buffer_info->time_stamp = 0; |
| } |
| |
| static void igbvf_print_tx_hang(struct igbvf_adapter *adapter) |
| { |
| struct igbvf_ring *tx_ring = adapter->tx_ring; |
| unsigned int i = tx_ring->next_to_clean; |
| unsigned int eop = tx_ring->buffer_info[i].next_to_watch; |
| union e1000_adv_tx_desc *eop_desc = IGBVF_TX_DESC_ADV(*tx_ring, eop); |
| |
| /* detected Tx unit hang */ |
| dev_err(&adapter->pdev->dev, |
| "Detected Tx Unit Hang:\n" |
| " TDH <%x>\n" |
| " TDT <%x>\n" |
| " next_to_use <%x>\n" |
| " next_to_clean <%x>\n" |
| "buffer_info[next_to_clean]:\n" |
| " time_stamp <%lx>\n" |
| " next_to_watch <%x>\n" |
| " jiffies <%lx>\n" |
| " next_to_watch.status <%x>\n", |
| readl(adapter->hw.hw_addr + tx_ring->head), |
| readl(adapter->hw.hw_addr + tx_ring->tail), |
| tx_ring->next_to_use, |
| tx_ring->next_to_clean, |
| tx_ring->buffer_info[eop].time_stamp, |
| eop, |
| jiffies, |
| eop_desc->wb.status); |
| } |
| |
| /** |
| * 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 = vmalloc(size); |
| if (!tx_ring->buffer_info) |
| goto err; |
| memset(tx_ring->buffer_info, 0, size); |
| |
| /* 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 = pci_alloc_consistent(pdev, tx_ring->size, |
| &tx_ring->dma); |
| |
| 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 = vmalloc(size); |
| if (!rx_ring->buffer_info) |
| goto err; |
| memset(rx_ring->buffer_info, 0, size); |
| |
| 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 = pci_alloc_consistent(pdev, rx_ring->size, |
| &rx_ring->dma); |
| |
| 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; |
| |
| pci_free_consistent(pdev, 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){ |
| pci_unmap_single(pdev, buffer_info->dma, |
| adapter->rx_ps_hdr_size, |
| PCI_DMA_FROMDEVICE); |
| } else { |
| pci_unmap_single(pdev, buffer_info->dma, |
| adapter->rx_buffer_len, |
| PCI_DMA_FROMDEVICE); |
| } |
| 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) |
| pci_unmap_page(pdev, buffer_info->page_dma, |
| PAGE_SIZE / 2, |
| PCI_DMA_FROMDEVICE); |
| 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 e1000_hw *hw = &adapter->hw; |
| 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)) { |
| 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; |
| } |
| } |
| |
| if (adapter->detect_tx_hung) { |
| /* Detect a transmit hang in hardware, this serializes the |
| * check with the clearing of time_stamp and movement of i */ |
| adapter->detect_tx_hung = false; |
| if (tx_ring->buffer_info[i].time_stamp && |
| time_after(jiffies, tx_ring->buffer_info[i].time_stamp + |
| (adapter->tx_timeout_factor * HZ)) |
| && !(er32(STATUS) & E1000_STATUS_TXOFF)) { |
| |
| tx_desc = IGBVF_TX_DESC_ADV(*tx_ring, i); |
| /* detected Tx unit hang */ |
| igbvf_print_tx_hang(adapter); |
| |
| netif_stop_queue(netdev); |
| } |
| } |
| 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_GROUP_ARRAY_LEN; 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; |
| |
| adapter->tx_queue_len = adapter->netdev->tx_queue_len; |
| } |
| |
| /** |
| * 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 dev_mc_list *mc_ptr; |
| u8 *mta_list = NULL; |
| int i; |
| |
| if (netdev->mc_count) { |
| mta_list = kmalloc(netdev->mc_count * 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. */ |
| mc_ptr = netdev->mc_list; |
| |
| for (i = 0; i < netdev->mc_count; i++) { |
| if (!mc_ptr) |
| break; |
| memcpy(mta_list + (i*ETH_ALEN), mc_ptr->dmi_addr, |
| ETH_ALEN); |
| mc_ptr = mc_ptr->next; |
| } |
| |
| 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); |
| } |
| } |
| |
| 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); |
| |
| netdev->tx_queue_len = adapter->tx_queue_len; |
| 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; |
| |
| 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) |
| 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)) { |
| bool txb2b = 1; |
| |
| mac->ops.get_link_up_info(&adapter->hw, |
| &adapter->link_speed, |
| &adapter->link_duplex); |
| igbvf_print_link_info(adapter); |
| |
| /* |
| * tweak tx_queue_len according to speed/duplex |
| * and adjust the timeout factor |
| */ |
| netdev->tx_queue_len = adapter->tx_queue_len; |
| adapter->tx_timeout_factor = 1; |
| switch (adapter->link_speed) { |
| case SPEED_10: |
| txb2b = 0; |
| netdev->tx_queue_len = 10; |
| adapter->tx_timeout_factor = 16; |
| break; |
| case SPEED_100: |
| txb2b = 0; |
| netdev->tx_queue_len = 100; |
| /* maybe add some timeout factor ? */ |
| break; |
| } |
| |
| netif_carrier_on(netdev); |
| netif_wake_queue(netdev); |
| } |
| } else { |
| if (netif_carrier_ok(netdev)) { |
| adapter->link_speed = 0; |
| adapter->link_duplex = 0; |
| dev_info(&adapter->pdev->dev, "Link is Down\n"); |
| netif_carrier_off(netdev); |
| netif_stop_queue(netdev); |
| } |
| } |
| |
| if (netif_carrier_ok(netdev)) { |
| igbvf_update_stats(adapter); |
| } else { |
| tx_pending = (igbvf_desc_unused(tx_ring) + 1 < |
| tx_ring->count); |
| if (tx_pending) { |
| /* |
| * We've lost link, so the controller stops DMA, |
| * but we've got queued Tx work that's never going |
| * to get done, so reset controller to flush Tx. |
| * (Do the reset outside of interrupt context). |
| */ |
| adapter->tx_timeout_count++; |
| schedule_work(&adapter->reset_task); |
| } |
| } |
| |
| /* Cause software interrupt to ensure Rx ring is cleaned */ |
| ew32(EICS, adapter->rx_ring->eims_value); |
| |
| /* Force detection of hung controller every watchdog period */ |
| adapter->detect_tx_hung = 1; |
| |
| /* Reset the timer */ |
| if (!test_bit(__IGBVF_DOWN, &adapter->state)) |
| mod_timer(&adapter->watchdog_timer, |
| round_jiffies(jiffies + (2 * HZ))); |
| } |
| |
| #define IGBVF_TX_FLAGS_CSUM 0x00000001 |
| #define IGBVF_TX_FLAGS_VLAN 0x00000002 |
| #define IGBVF_TX_FLAGS_TSO 0x00000004 |
| #define IGBVF_TX_FLAGS_IPV4 0x00000008 |
| #define IGBVF_TX_FLAGS_VLAN_MASK 0xffff0000 |
| #define IGBVF_TX_FLAGS_VLAN_SHIFT 16 |
| |
| static int igbvf_tso(struct igbvf_adapter *adapter, |
| struct igbvf_ring *tx_ring, |
| struct sk_buff *skb, u32 tx_flags, u8 *hdr_len) |
| { |
| struct e1000_adv_tx_context_desc *context_desc; |
| unsigned int i; |
| int err; |
| struct igbvf_buffer *buffer_info; |
| u32 info = 0, tu_cmd = 0; |
| u32 mss_l4len_idx, l4len; |
| *hdr_len = 0; |
| |
| if (skb_header_cloned(skb)) { |
| err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC); |
| if (err) { |
| dev_err(&adapter->pdev->dev, |
| "igbvf_tso returning an error\n"); |
| return err; |
| } |
| } |
| |
| l4len = tcp_hdrlen(skb); |
| *hdr_len += l4len; |
| |
| if (skb->protocol == htons(ETH_P_IP)) { |
| struct iphdr *iph = ip_hdr(skb); |
| iph->tot_len = 0; |
| iph->check = 0; |
| tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr, |
| iph->daddr, 0, |
| IPPROTO_TCP, |
| 0); |
| } else if (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6) { |
| ipv6_hdr(skb)->payload_len = 0; |
| tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
| &ipv6_hdr(skb)->daddr, |
| 0, IPPROTO_TCP, 0); |
| } |
| |
| i = tx_ring->next_to_use; |
| |
| buffer_info = &tx_ring->buffer_info[i]; |
| context_desc = IGBVF_TX_CTXTDESC_ADV(*tx_ring, i); |
| /* VLAN MACLEN IPLEN */ |
| if (tx_flags & IGBVF_TX_FLAGS_VLAN) |
| info |= (tx_flags & IGBVF_TX_FLAGS_VLAN_MASK); |
| info |= (skb_network_offset(skb) << E1000_ADVTXD_MACLEN_SHIFT); |
| *hdr_len += skb_network_offset(skb); |
| info |= (skb_transport_header(skb) - skb_network_header(skb)); |
| *hdr_len += (skb_transport_header(skb) - skb_network_header(skb)); |
| context_desc->vlan_macip_lens = cpu_to_le32(info); |
| |
| /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */ |
| tu_cmd |= (E1000_TXD_CMD_DEXT | E1000_ADVTXD_DTYP_CTXT); |
| |
| if (skb->protocol == htons(ETH_P_IP)) |
| tu_cmd |= E1000_ADVTXD_TUCMD_IPV4; |
| tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP; |
| |
| context_desc->type_tucmd_mlhl = cpu_to_le32(tu_cmd); |
| |
| /* MSS L4LEN IDX */ |
| mss_l4len_idx = (skb_shinfo(skb)->gso_size << E1000_ADVTXD_MSS_SHIFT); |
| mss_l4len_idx |= (l4len << E1000_ADVTXD_L4LEN_SHIFT); |
| |
| context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx); |
| context_desc->seqnum_seed = 0; |
| |
| buffer_info->time_stamp = jiffies; |
| buffer_info->next_to_watch = i; |
| buffer_info->dma = 0; |
| i++; |
| if (i == tx_ring->count) |
| i = 0; |
| |
| tx_ring->next_to_use = i; |
| |
| return true; |
| } |
| |
| static inline bool igbvf_tx_csum(struct igbvf_adapter *adapter, |
| struct igbvf_ring *tx_ring, |
| struct sk_buff *skb, u32 tx_flags) |
| { |
| struct e1000_adv_tx_context_desc *context_desc; |
| unsigned int i; |
| struct igbvf_buffer *buffer_info; |
| u32 info = 0, tu_cmd = 0; |
| |
| if ((skb->ip_summed == CHECKSUM_PARTIAL) || |
| (tx_flags & IGBVF_TX_FLAGS_VLAN)) { |
| i = tx_ring->next_to_use; |
| buffer_info = &tx_ring->buffer_info[i]; |
| context_desc = IGBVF_TX_CTXTDESC_ADV(*tx_ring, i); |
| |
| if (tx_flags & IGBVF_TX_FLAGS_VLAN) |
| info |= (tx_flags & IGBVF_TX_FLAGS_VLAN_MASK); |
| |
| info |= (skb_network_offset(skb) << E1000_ADVTXD_MACLEN_SHIFT); |
| if (skb->ip_summed == CHECKSUM_PARTIAL) |
| info |= (skb_transport_header(skb) - |
| skb_network_header(skb)); |
| |
| |
| context_desc->vlan_macip_lens = cpu_to_le32(info); |
| |
| tu_cmd |= (E1000_TXD_CMD_DEXT | E1000_ADVTXD_DTYP_CTXT); |
| |
| if (skb->ip_summed == CHECKSUM_PARTIAL) { |
| switch (skb->protocol) { |
| case __constant_htons(ETH_P_IP): |
| tu_cmd |= E1000_ADVTXD_TUCMD_IPV4; |
| if (ip_hdr(skb)->protocol == IPPROTO_TCP) |
| tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP; |
| break; |
| case __constant_htons(ETH_P_IPV6): |
| if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) |
| tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP; |
| break; |
| default: |
| break; |
| } |
| } |
| |
| context_desc->type_tucmd_mlhl = cpu_to_le32(tu_cmd); |
| context_desc->seqnum_seed = 0; |
| context_desc->mss_l4len_idx = 0; |
| |
| buffer_info->time_stamp = jiffies; |
| buffer_info->next_to_watch = i; |
| buffer_info->dma = 0; |
| i++; |
| if (i == tx_ring->count) |
| i = 0; |
| tx_ring->next_to_use = i; |
| |
| return true; |
| } |
| |
| return false; |
| } |
| |
| static int igbvf_maybe_stop_tx(struct net_device *netdev, int size) |
| { |
| struct igbvf_adapter *adapter = netdev_priv(netdev); |
| |
| /* there is enough descriptors then we don't need to worry */ |
| if (igbvf_desc_unused(adapter->tx_ring) >= size) |
| return 0; |
| |
| netif_stop_queue(netdev); |
| |
| smp_mb(); |
| |
| /* We need to check again just in case room has been made available */ |
| if (igbvf_desc_unused(adapter->tx_ring) < size) |
| return -EBUSY; |
| |
| netif_wake_queue(netdev); |
| |
| ++adapter->restart_queue; |
| return 0; |
| } |
| |
| #define IGBVF_MAX_TXD_PWR 16 |
| #define IGBVF_MAX_DATA_PER_TXD (1 << IGBVF_MAX_TXD_PWR) |
| |
| static inline int igbvf_tx_map_adv(struct igbvf_adapter *adapter, |
| struct igbvf_ring *tx_ring, |
| struct sk_buff *skb, |
| unsigned int first) |
| { |
| struct igbvf_buffer *buffer_info; |
| unsigned int len = skb_headlen(skb); |
| unsigned int count = 0, i; |
| unsigned int f; |
| dma_addr_t *map; |
| |
| i = tx_ring->next_to_use; |
| |
| if (skb_dma_map(&adapter->pdev->dev, skb, DMA_TO_DEVICE)) { |
| dev_err(&adapter->pdev->dev, "TX DMA map failed\n"); |
| return 0; |
| } |
| |
| map = skb_shinfo(skb)->dma_maps; |
| |
| buffer_info = &tx_ring->buffer_info[i]; |
| BUG_ON(len >= IGBVF_MAX_DATA_PER_TXD); |
| buffer_info->length = len; |
| /* set time_stamp *before* dma to help avoid a possible race */ |
| buffer_info->time_stamp = jiffies; |
| buffer_info->next_to_watch = i; |
| buffer_info->dma = skb_shinfo(skb)->dma_head; |
| |
| for (f = 0; f < skb_shinfo(skb)->nr_frags; f++) { |
| struct skb_frag_struct *frag; |
| |
| i++; |
| if (i == tx_ring->count) |
| i = 0; |
| |
| frag = &skb_shinfo(skb)->frags[f]; |
| len = frag->size; |
| |
| buffer_info = &tx_ring->buffer_info[i]; |
| BUG_ON(len >= IGBVF_MAX_DATA_PER_TXD); |
| buffer_info->length = len; |
| buffer_info->time_stamp = jiffies; |
| buffer_info->next_to_watch = i; |
| buffer_info->dma = map[count]; |
| count++; |
| } |
| |
| tx_ring->buffer_info[i].skb = skb; |
| tx_ring->buffer_info[first].next_to_watch = i; |
| |
| return count + 1; |
| } |
| |
| static inline void igbvf_tx_queue_adv(struct igbvf_adapter *adapter, |
| struct igbvf_ring *tx_ring, |
| int tx_flags, int count, u32 paylen, |
| u8 hdr_len) |
| { |
| union e1000_adv_tx_desc *tx_desc = NULL; |
| struct igbvf_buffer *buffer_info; |
| u32 olinfo_status = 0, cmd_type_len; |
| unsigned int i; |
| |
| cmd_type_len = (E1000_ADVTXD_DTYP_DATA | E1000_ADVTXD_DCMD_IFCS | |
| E1000_ADVTXD_DCMD_DEXT); |
| |
| if (tx_flags & IGBVF_TX_FLAGS_VLAN) |
| cmd_type_len |= E1000_ADVTXD_DCMD_VLE; |
| |
| if (tx_flags & IGBVF_TX_FLAGS_TSO) { |
| cmd_type_len |= E1000_ADVTXD_DCMD_TSE; |
| |
| /* insert tcp checksum */ |
| olinfo_status |= E1000_TXD_POPTS_TXSM << 8; |
| |
| /* insert ip checksum */ |
| if (tx_flags & IGBVF_TX_FLAGS_IPV4) |
| olinfo_status |= E1000_TXD_POPTS_IXSM << 8; |
| |
| } else if (tx_flags & IGBVF_TX_FLAGS_CSUM) { |
| olinfo_status |= E1000_TXD_POPTS_TXSM << 8; |
| } |
| |
| olinfo_status |= ((paylen - hdr_len) << E1000_ADVTXD_PAYLEN_SHIFT); |
| |
| i = tx_ring->next_to_use; |
| while (count--) { |
| buffer_info = &tx_ring->buffer_info[i]; |
| tx_desc = IGBVF_TX_DESC_ADV(*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); |
| tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status); |
| i++; |
| if (i == tx_ring->count) |
| i = 0; |
| } |
| |
| tx_desc->read.cmd_type_len |= cpu_to_le32(adapter->txd_cmd); |
| /* 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(); |
| |
| tx_ring->next_to_use = i; |
| writel(i, adapter->hw.hw_addr + tx_ring->tail); |
| /* we need this if more than one processor can write to our tail |
| * at a time, it syncronizes IO on IA64/Altix systems */ |
| mmiowb(); |
| } |
| |
| static netdev_tx_t igbvf_xmit_frame_ring_adv(struct sk_buff *skb, |
| struct net_device *netdev, |
| struct igbvf_ring *tx_ring) |
| { |
| struct igbvf_adapter *adapter = netdev_priv(netdev); |
| unsigned int first, tx_flags = 0; |
| u8 hdr_len = 0; |
| int count = 0; |
| int tso = 0; |
| |
| if (test_bit(__IGBVF_DOWN, &adapter->state)) { |
| dev_kfree_skb_any(skb); |
| return NETDEV_TX_OK; |
| } |
| |
| if (skb->len <= 0) { |
| dev_kfree_skb_any(skb); |
| return NETDEV_TX_OK; |
| } |
| |
| /* |
| * need: count + 4 desc gap to keep tail from touching |
| * + 2 desc gap to keep tail from touching head, |
| * + 1 desc for skb->data, |
| * + 1 desc for context descriptor, |
| * head, otherwise try next time |
| */ |
| if (igbvf_maybe_stop_tx(netdev, skb_shinfo(skb)->nr_frags + 4)) { |
| /* this is a hard error */ |
| return NETDEV_TX_BUSY; |
| } |
| |
| if (adapter->vlgrp && vlan_tx_tag_present(skb)) { |
| tx_flags |= IGBVF_TX_FLAGS_VLAN; |
| tx_flags |= (vlan_tx_tag_get(skb) << IGBVF_TX_FLAGS_VLAN_SHIFT); |
| } |
| |
| if (skb->protocol == htons(ETH_P_IP)) |
| tx_flags |= IGBVF_TX_FLAGS_IPV4; |
| |
| first = tx_ring->next_to_use; |
| |
| tso = skb_is_gso(skb) ? |
| igbvf_tso(adapter, tx_ring, skb, tx_flags, &hdr_len) : 0; |
| if (unlikely(tso < 0)) { |
| dev_kfree_skb_any(skb); |
| return NETDEV_TX_OK; |
| } |
| |
| if (tso) |
| tx_flags |= IGBVF_TX_FLAGS_TSO; |
| else if (igbvf_tx_csum(adapter, tx_ring, skb, tx_flags) && |
| (skb->ip_summed == CHECKSUM_PARTIAL)) |
| tx_flags |= IGBVF_TX_FLAGS_CSUM; |
| |
| /* |
| * count reflects descriptors mapped, if 0 then mapping error |
| * has occured and we need to rewind the descriptor queue |
| */ |
| count = igbvf_tx_map_adv(adapter, tx_ring, skb, first); |
| |
| if (count) { |
| igbvf_tx_queue_adv(adapter, tx_ring, tx_flags, count, |
| skb->len, hdr_len); |
| /* Make sure there is space in the ring for the next send. */ |
| igbvf_maybe_stop_tx(netdev, MAX_SKB_FRAGS + 4); |
| } else { |
| dev_kfree_skb_any(skb); |
| tx_ring->buffer_info[first].time_stamp = 0; |
| tx_ring->next_to_use = first; |
| } |
| |
| return NETDEV_TX_OK; |
| } |
| |
| static netdev_tx_t igbvf_xmit_frame(struct sk_buff *skb, |
| struct net_device *netdev) |
| { |
| struct igbvf_adapter *adapter = netdev_priv(netdev); |
| struct igbvf_ring *tx_ring; |
| |
| if (test_bit(__IGBVF_DOWN, &adapter->state)) { |
| dev_kfree_skb_any(skb); |
| return NETDEV_TX_OK; |
| } |
| |
| tx_ring = &adapter->tx_ring[0]; |
| |
| return igbvf_xmit_frame_ring_adv(skb, netdev, tx_ring); |
| } |
| |
| /** |
| * igbvf_tx_timeout - Respond to a Tx Hang |
| * @netdev: network interface device structure |
| **/ |
| static void igbvf_tx_timeout(struct net_device *netdev) |
| { |
| struct igbvf_adapter *adapter = netdev_priv(netdev); |
| |
| /* Do the reset outside of interrupt context */ |
| adapter->tx_timeout_count++; |
| schedule_work(&adapter->reset_task); |
| } |
| |
| static void igbvf_reset_task(struct work_struct *work) |
| { |
| struct igbvf_adapter *adapter; |
| adapter = container_of(work, struct igbvf_adapter, reset_task); |
| |
| igbvf_reinit_locked(adapter); |
| } |
| |
| /** |
| * igbvf_get_stats - Get System Network Statistics |
| * @netdev: network interface device structure |
| * |
| * Returns the address of the device statistics structure. |
| * The statistics are actually updated from the timer callback. |
| **/ |
| static struct net_device_stats *igbvf_get_stats(struct net_device *netdev) |
| { |
| struct igbvf_adapter *adapter = netdev_priv(netdev); |
| |
| /* only return the current stats */ |
| return &adapter->net_stats; |
| } |
| |
| /** |
| * igbvf_change_mtu - Change the Maximum Transfer Unit |
| * @netdev: network interface device structure |
| * @new_mtu: new value for maximum frame size |
| * |
| * Returns 0 on success, negative on failure |
| **/ |
| static int igbvf_change_mtu(struct net_device *netdev, int new_mtu) |
| { |
| struct igbvf_adapter *adapter = netdev_priv(netdev); |
| int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN; |
| |
| if ((new_mtu < 68) || (max_frame > MAX_JUMBO_FRAME_SIZE)) { |
| dev_err(&adapter->pdev->dev, "Invalid MTU setting\n"); |
| return -EINVAL; |
| } |
| |
| #define MAX_STD_JUMBO_FRAME_SIZE 9234 |
| if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) { |
| dev_err(&adapter->pdev->dev, "MTU > 9216 not supported.\n"); |
| return -EINVAL; |
| } |
| |
| while (test_and_set_bit(__IGBVF_RESETTING, &adapter->state)) |
| msleep(1); |
| /* igbvf_down has a dependency on max_frame_size */ |
| adapter->max_frame_size = max_frame; |
| if (netif_running(netdev)) |
| igbvf_down(adapter); |
| |
| /* |
| * 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 |
| * However with the new *_jumbo_rx* routines, jumbo receives will use |
| * fragmented skbs |
| */ |
| |
| if (max_frame <= 1024) |
| adapter->rx_buffer_len = 1024; |
| else if (max_frame <= 2048) |
| adapter->rx_buffer_len = 2048; |
| else |
| #if (PAGE_SIZE / 2) > 16384 |
| adapter->rx_buffer_len = 16384; |
| #else |
| adapter->rx_buffer_len = PAGE_SIZE / 2; |
| #endif |
| |
| |
| /* adjust allocation if LPE protects us, and we aren't using SBP */ |
| if ((max_frame == ETH_FRAME_LEN + ETH_FCS_LEN) || |
| (max_frame == ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN)) |
| adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN + |
| ETH_FCS_LEN; |
| |
| dev_info(&adapter->pdev->dev, "changing MTU from %d to %d\n", |
| netdev->mtu, new_mtu); |
| netdev->mtu = new_mtu; |
| |
| if (netif_running(netdev)) |
| igbvf_up(adapter); |
| else |
| igbvf_reset(adapter); |
| |
| clear_bit(__IGBVF_RESETTING, &adapter->state); |
| |
| return 0; |
| } |
| |
| static int igbvf_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) |
| { |
| switch (cmd) { |
| default: |
| return -EOPNOTSUPP; |
| } |
| } |
| |
| static int igbvf_suspend(struct pci_dev *pdev, pm_message_t state) |
| { |
| struct net_device *netdev = pci_get_drvdata(pdev); |
| struct igbvf_adapter *adapter = netdev_priv(netdev); |
| #ifdef CONFIG_PM |
| int retval = 0; |
| #endif |
| |
| netif_device_detach(netdev); |
| |
| if (netif_running(netdev)) { |
| WARN_ON(test_bit(__IGBVF_RESETTING, &adapter->state)); |
| igbvf_down(adapter); |
| igbvf_free_irq(adapter); |
| } |
| |
| #ifdef CONFIG_PM |
| retval = pci_save_state(pdev); |
| if (retval) |
| return retval; |
| #endif |
| |
| pci_disable_device(pdev); |
| |
| return 0; |
| } |
| |
| #ifdef CONFIG_PM |
| static int igbvf_resume(struct pci_dev *pdev) |
| { |
| struct net_device *netdev = pci_get_drvdata(pdev); |
| struct igbvf_adapter *adapter = netdev_priv(netdev); |
| u32 err; |
| |
| pci_restore_state(pdev); |
| err = pci_enable_device_mem(pdev); |
| if (err) { |
| dev_err(&pdev->dev, "Cannot enable PCI device from suspend\n"); |
| return err; |
| } |
| |
| pci_set_master(pdev); |
| |
| if (netif_running(netdev)) { |
| err = igbvf_request_irq(adapter); |
| if (err) |
| return err; |
| } |
| |
| igbvf_reset(adapter); |
| |
| if (netif_running(netdev)) |
| igbvf_up(adapter); |
| |
| netif_device_attach(netdev); |
| |
| return 0; |
| } |
| #endif |
| |
| static void igbvf_shutdown(struct pci_dev *pdev) |
| { |
| igbvf_suspend(pdev, PMSG_SUSPEND); |
| } |
| |
| #ifdef CONFIG_NET_POLL_CONTROLLER |
| /* |
| * Polling 'interrupt' - used by things like netconsole to send skbs |
| * without having to re-enable interrupts. It's not called while |
| * the interrupt routine is executing. |
| */ |
| static void igbvf_netpoll(struct net_device *netdev) |
| { |
| struct igbvf_adapter *adapter = netdev_priv(netdev); |
| |
| disable_irq(adapter->pdev->irq); |
| |
| igbvf_clean_tx_irq(adapter->tx_ring); |
| |
| enable_irq(adapter->pdev->irq); |
| } |
| #endif |
| |
| /** |
| * igbvf_io_error_detected - called when PCI error is detected |
| * @pdev: Pointer to PCI device |
| * @state: The current pci connection state |
| * |
| * This function is called after a PCI bus error affecting |
| * this device has been detected. |
| */ |
| static pci_ers_result_t igbvf_io_error_detected(struct pci_dev *pdev, |
| pci_channel_state_t state) |
| { |
| struct net_device *netdev = pci_get_drvdata(pdev); |
| struct igbvf_adapter *adapter = netdev_priv(netdev); |
| |
| netif_device_detach(netdev); |
| |
| if (state == pci_channel_io_perm_failure) |
| return PCI_ERS_RESULT_DISCONNECT; |
| |
| if (netif_running(netdev)) |
| igbvf_down(adapter); |
| pci_disable_device(pdev); |
| |
| /* Request a slot slot reset. */ |
| return PCI_ERS_RESULT_NEED_RESET; |
| } |
| |
| /** |
| * igbvf_io_slot_reset - called after the pci bus has been reset. |
| * @pdev: Pointer to PCI device |
| * |
| * Restart the card from scratch, as if from a cold-boot. Implementation |
| * resembles the first-half of the igbvf_resume routine. |
| */ |
| static pci_ers_result_t igbvf_io_slot_reset(struct pci_dev *pdev) |
| { |
| struct net_device *netdev = pci_get_drvdata(pdev); |
| struct igbvf_adapter *adapter = netdev_priv(netdev); |
| |
| if (pci_enable_device_mem(pdev)) { |
| dev_err(&pdev->dev, |
| "Cannot re-enable PCI device after reset.\n"); |
| return PCI_ERS_RESULT_DISCONNECT; |
| } |
| pci_set_master(pdev); |
| |
| igbvf_reset(adapter); |
| |
| return PCI_ERS_RESULT_RECOVERED; |
| } |
| |
| /** |
| * igbvf_io_resume - called when traffic can start flowing again. |
| * @pdev: Pointer to PCI device |
| * |
| * This callback is called when the error recovery driver tells us that |
| * its OK to resume normal operation. Implementation resembles the |
| * second-half of the igbvf_resume routine. |
| */ |
| static void igbvf_io_resume(struct pci_dev *pdev) |
| { |
| struct net_device *netdev = pci_get_drvdata(pdev); |
| struct igbvf_adapter *adapter = netdev_priv(netdev); |
| |
| if (netif_running(netdev)) { |
| if (igbvf_up(adapter)) { |
| dev_err(&pdev->dev, |
| "can't bring device back up after reset\n"); |
| return; |
| } |
| } |
| |
| netif_device_attach(netdev); |
| } |
| |
| static void igbvf_print_device_info(struct igbvf_adapter *adapter) |
| { |
| struct e1000_hw *hw = &adapter->hw; |
| struct net_device *netdev = adapter->netdev; |
| struct pci_dev *pdev = adapter->pdev; |
| |
| dev_info(&pdev->dev, "Intel(R) 82576 Virtual Function\n"); |
| dev_info(&pdev->dev, "Address: %02x:%02x:%02x:%02x:%02x:%02x\n", |
| /* MAC address */ |
| netdev->dev_addr[0], netdev->dev_addr[1], |
| netdev->dev_addr[2], netdev->dev_addr[3], |
| netdev->dev_addr[4], netdev->dev_addr[5]); |
| dev_info(&pdev->dev, "MAC: %d\n", hw->mac.type); |
| } |
| |
| static const struct net_device_ops igbvf_netdev_ops = { |
| .ndo_open = igbvf_open, |
| .ndo_stop = igbvf_close, |
| .ndo_start_xmit = igbvf_xmit_frame, |
| .ndo_get_stats = igbvf_get_stats, |
| .ndo_set_multicast_list = igbvf_set_multi, |
| .ndo_set_mac_address = igbvf_set_mac, |
| .ndo_change_mtu = igbvf_change_mtu, |
| .ndo_do_ioctl = igbvf_ioctl, |
| .ndo_tx_timeout = igbvf_tx_timeout, |
| .ndo_vlan_rx_register = igbvf_vlan_rx_register, |
| .ndo_vlan_rx_add_vid = igbvf_vlan_rx_add_vid, |
| .ndo_vlan_rx_kill_vid = igbvf_vlan_rx_kill_vid, |
| #ifdef CONFIG_NET_POLL_CONTROLLER |
| .ndo_poll_controller = igbvf_netpoll, |
| #endif |
| }; |
| |
| /** |
| * igbvf_probe - Device Initialization Routine |
| * @pdev: PCI device information struct |
| * @ent: entry in igbvf_pci_tbl |
| * |
| * Returns 0 on success, negative on failure |
| * |
| * igbvf_probe initializes an adapter identified by a pci_dev structure. |
| * The OS initialization, configuring of the adapter private structure, |
| * and a hardware reset occur. |
| **/ |
| static int __devinit igbvf_probe(struct pci_dev *pdev, |
| const struct pci_device_id *ent) |
| { |
| struct net_device *netdev; |
| struct igbvf_adapter *adapter; |
| struct e1000_hw *hw; |
| const struct igbvf_info *ei = igbvf_info_tbl[ent->driver_data]; |
| |
| static int cards_found; |
| int err, pci_using_dac; |
| |
| err = pci_enable_device_mem(pdev); |
| if (err) |
| return err; |
| |
| pci_using_dac = 0; |
| err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64)); |
| if (!err) { |
| err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); |
| if (!err) |
| pci_using_dac = 1; |
| } else { |
| err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); |
| if (err) { |
| err = pci_set_consistent_dma_mask(pdev, |
| DMA_BIT_MASK(32)); |
| if (err) { |
| dev_err(&pdev->dev, "No usable DMA " |
| "configuration, aborting\n"); |
| goto err_dma; |
| } |
| } |
| } |
| |
| err = pci_request_regions(pdev, igbvf_driver_name); |
| if (err) |
| goto err_pci_reg; |
| |
| pci_set_master(pdev); |
| |
| err = -ENOMEM; |
| netdev = alloc_etherdev(sizeof(struct igbvf_adapter)); |
| if (!netdev) |
| goto err_alloc_etherdev; |
| |
| SET_NETDEV_DEV(netdev, &pdev->dev); |
| |
| pci_set_drvdata(pdev, netdev); |
| adapter = netdev_priv(netdev); |
| hw = &adapter->hw; |
| adapter->netdev = netdev; |
| adapter->pdev = pdev; |
| adapter->ei = ei; |
| adapter->pba = ei->pba; |
| adapter->flags = ei->flags; |
| adapter->hw.back = adapter; |
| adapter->hw.mac.type = ei->mac; |
| adapter->msg_enable = (1 << NETIF_MSG_DRV | NETIF_MSG_PROBE) - 1; |
| |
| /* PCI config space info */ |
| |
| hw->vendor_id = pdev->vendor; |
| hw->device_id = pdev->device; |
| hw->subsystem_vendor_id = pdev->subsystem_vendor; |
| hw->subsystem_device_id = pdev->subsystem_device; |
| |
| pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id); |
| |
| err = -EIO; |
| adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0), |
| pci_resource_len(pdev, 0)); |
| |
| if (!adapter->hw.hw_addr) |
| goto err_ioremap; |
| |
| if (ei->get_variants) { |
| err = ei->get_variants(adapter); |
| if (err) |
| goto err_ioremap; |
| } |
| |
| /* setup adapter struct */ |
| err = igbvf_sw_init(adapter); |
| if (err) |
| goto err_sw_init; |
| |
| /* construct the net_device struct */ |
| netdev->netdev_ops = &igbvf_netdev_ops; |
| |
| igbvf_set_ethtool_ops(netdev); |
| netdev->watchdog_timeo = 5 * HZ; |
| strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1); |
| |
| adapter->bd_number = cards_found++; |
| |
| netdev->features = NETIF_F_SG | |
| NETIF_F_IP_CSUM | |
| NETIF_F_HW_VLAN_TX | |
| NETIF_F_HW_VLAN_RX | |
| NETIF_F_HW_VLAN_FILTER; |
| |
| netdev->features |= NETIF_F_IPV6_CSUM; |
| netdev->features |= NETIF_F_TSO; |
| netdev->features |= NETIF_F_TSO6; |
| |
| if (pci_using_dac) |
| netdev->features |= NETIF_F_HIGHDMA; |
| |
| netdev->vlan_features |= NETIF_F_TSO; |
| netdev->vlan_features |= NETIF_F_TSO6; |
| netdev->vlan_features |= NETIF_F_IP_CSUM; |
| netdev->vlan_features |= NETIF_F_IPV6_CSUM; |
| netdev->vlan_features |= NETIF_F_SG; |
| |
| /*reset the controller to put the device in a known good state */ |
| err = hw->mac.ops.reset_hw(hw); |
| if (err) { |
| dev_info(&pdev->dev, |
| "PF still in reset state, assigning new address\n"); |
| random_ether_addr(hw->mac.addr); |
| } else { |
| err = hw->mac.ops.read_mac_addr(hw); |
| if (err) { |
| dev_err(&pdev->dev, "Error reading MAC address\n"); |
| goto err_hw_init; |
| } |
| } |
| |
| memcpy(netdev->dev_addr, adapter->hw.mac.addr, netdev->addr_len); |
| memcpy(netdev->perm_addr, adapter->hw.mac.addr, netdev->addr_len); |
| |
| if (!is_valid_ether_addr(netdev->perm_addr)) { |
| dev_err(&pdev->dev, "Invalid MAC Address: " |
| "%02x:%02x:%02x:%02x:%02x:%02x\n", |
| netdev->dev_addr[0], netdev->dev_addr[1], |
| netdev->dev_addr[2], netdev->dev_addr[3], |
| netdev->dev_addr[4], netdev->dev_addr[5]); |
| err = -EIO; |
| goto err_hw_init; |
| } |
| |
| setup_timer(&adapter->watchdog_timer, &igbvf_watchdog, |
| (unsigned long) adapter); |
| |
| INIT_WORK(&adapter->reset_task, igbvf_reset_task); |
| INIT_WORK(&adapter->watchdog_task, igbvf_watchdog_task); |
| |
| /* ring size defaults */ |
| adapter->rx_ring->count = 1024; |
| adapter->tx_ring->count = 1024; |
| |
| /* reset the hardware with the new settings */ |
| igbvf_reset(adapter); |
| |
| /* tell the stack to leave us alone until igbvf_open() is called */ |
| netif_carrier_off(netdev); |
| netif_stop_queue(netdev); |
| |
| strcpy(netdev->name, "eth%d"); |
| err = register_netdev(netdev); |
| if (err) |
| goto err_hw_init; |
| |
| igbvf_print_device_info(adapter); |
| |
| igbvf_initialize_last_counter_stats(adapter); |
| |
| return 0; |
| |
| err_hw_init: |
| kfree(adapter->tx_ring); |
| kfree(adapter->rx_ring); |
| err_sw_init: |
| igbvf_reset_interrupt_capability(adapter); |
| iounmap(adapter->hw.hw_addr); |
| err_ioremap: |
| free_netdev(netdev); |
| err_alloc_etherdev: |
| pci_release_regions(pdev); |
| err_pci_reg: |
| err_dma: |
| pci_disable_device(pdev); |
| return err; |
| } |
| |
| /** |
| * igbvf_remove - Device Removal Routine |
| * @pdev: PCI device information struct |
| * |
| * igbvf_remove is called by the PCI subsystem to alert the driver |
| * that it should release a PCI device. The could be caused by a |
| * Hot-Plug event, or because the driver is going to be removed from |
| * memory. |
| **/ |
| static void __devexit igbvf_remove(struct pci_dev *pdev) |
| { |
| struct net_device *netdev = pci_get_drvdata(pdev); |
| struct igbvf_adapter *adapter = netdev_priv(netdev); |
| struct e1000_hw *hw = &adapter->hw; |
| |
| /* |
| * flush_scheduled work may reschedule our watchdog task, so |
| * explicitly disable watchdog tasks from being rescheduled |
| */ |
| set_bit(__IGBVF_DOWN, &adapter->state); |
| del_timer_sync(&adapter->watchdog_timer); |
| |
| flush_scheduled_work(); |
| |
| unregister_netdev(netdev); |
| |
| igbvf_reset_interrupt_capability(adapter); |
| |
| /* |
| * it is important to delete the napi struct prior to freeing the |
| * rx ring so that you do not end up with null pointer refs |
| */ |
| netif_napi_del(&adapter->rx_ring->napi); |
| kfree(adapter->tx_ring); |
| kfree(adapter->rx_ring); |
| |
| iounmap(hw->hw_addr); |
| if (hw->flash_address) |
| iounmap(hw->flash_address); |
| pci_release_regions(pdev); |
| |
| free_netdev(netdev); |
| |
| pci_disable_device(pdev); |
| } |
| |
| /* PCI Error Recovery (ERS) */ |
| static struct pci_error_handlers igbvf_err_handler = { |
| .error_detected = igbvf_io_error_detected, |
| .slot_reset = igbvf_io_slot_reset, |
| .resume = igbvf_io_resume, |
| }; |
| |
| static struct pci_device_id igbvf_pci_tbl[] = { |
| { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_VF), board_vf }, |
| { } /* terminate list */ |
| }; |
| MODULE_DEVICE_TABLE(pci, igbvf_pci_tbl); |
| |
| /* PCI Device API Driver */ |
| static struct pci_driver igbvf_driver = { |
| .name = igbvf_driver_name, |
| .id_table = igbvf_pci_tbl, |
| .probe = igbvf_probe, |
| .remove = __devexit_p(igbvf_remove), |
| #ifdef CONFIG_PM |
| /* Power Management Hooks */ |
| .suspend = igbvf_suspend, |
| .resume = igbvf_resume, |
| #endif |
| .shutdown = igbvf_shutdown, |
| .err_handler = &igbvf_err_handler |
| }; |
| |
| /** |
| * igbvf_init_module - Driver Registration Routine |
| * |
| * igbvf_init_module is the first routine called when the driver is |
| * loaded. All it does is register with the PCI subsystem. |
| **/ |
| static int __init igbvf_init_module(void) |
| { |
| int ret; |
| printk(KERN_INFO "%s - version %s\n", |
| igbvf_driver_string, igbvf_driver_version); |
| printk(KERN_INFO "%s\n", igbvf_copyright); |
| |
| ret = pci_register_driver(&igbvf_driver); |
| pm_qos_add_requirement(PM_QOS_CPU_DMA_LATENCY, igbvf_driver_name, |
| PM_QOS_DEFAULT_VALUE); |
| |
| return ret; |
| } |
| module_init(igbvf_init_module); |
| |
| /** |
| * igbvf_exit_module - Driver Exit Cleanup Routine |
| * |
| * igbvf_exit_module is called just before the driver is removed |
| * from memory. |
| **/ |
| static void __exit igbvf_exit_module(void) |
| { |
| pci_unregister_driver(&igbvf_driver); |
| pm_qos_remove_requirement(PM_QOS_CPU_DMA_LATENCY, igbvf_driver_name); |
| } |
| module_exit(igbvf_exit_module); |
| |
| |
| MODULE_AUTHOR("Intel Corporation, <e1000-devel@lists.sourceforge.net>"); |
| MODULE_DESCRIPTION("Intel(R) 82576 Virtual Function Network Driver"); |
| MODULE_LICENSE("GPL"); |
| MODULE_VERSION(DRV_VERSION); |
| |
| /* netdev.c */ |