| /* |
| * Copyright 2008-2010 Cisco Systems, Inc. All rights reserved. |
| * Copyright 2007 Nuova Systems, Inc. All rights reserved. |
| * |
| * This program is free software; you may redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; version 2 of the License. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| * SOFTWARE. |
| * |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/kernel.h> |
| #include <linux/string.h> |
| #include <linux/errno.h> |
| #include <linux/types.h> |
| #include <linux/init.h> |
| #include <linux/interrupt.h> |
| #include <linux/workqueue.h> |
| #include <linux/pci.h> |
| #include <linux/netdevice.h> |
| #include <linux/etherdevice.h> |
| #include <linux/if.h> |
| #include <linux/if_ether.h> |
| #include <linux/if_vlan.h> |
| #include <linux/in.h> |
| #include <linux/ip.h> |
| #include <linux/ipv6.h> |
| #include <linux/tcp.h> |
| #include <linux/rtnetlink.h> |
| #include <linux/prefetch.h> |
| #include <net/ip6_checksum.h> |
| #include <linux/ktime.h> |
| #include <linux/numa.h> |
| #ifdef CONFIG_RFS_ACCEL |
| #include <linux/cpu_rmap.h> |
| #endif |
| #ifdef CONFIG_NET_RX_BUSY_POLL |
| #include <net/busy_poll.h> |
| #endif |
| #include <linux/crash_dump.h> |
| |
| #include "cq_enet_desc.h" |
| #include "vnic_dev.h" |
| #include "vnic_intr.h" |
| #include "vnic_stats.h" |
| #include "vnic_vic.h" |
| #include "enic_res.h" |
| #include "enic.h" |
| #include "enic_dev.h" |
| #include "enic_pp.h" |
| #include "enic_clsf.h" |
| |
| #define ENIC_NOTIFY_TIMER_PERIOD (2 * HZ) |
| #define WQ_ENET_MAX_DESC_LEN (1 << WQ_ENET_LEN_BITS) |
| #define MAX_TSO (1 << 16) |
| #define ENIC_DESC_MAX_SPLITS (MAX_TSO / WQ_ENET_MAX_DESC_LEN + 1) |
| |
| #define PCI_DEVICE_ID_CISCO_VIC_ENET 0x0043 /* ethernet vnic */ |
| #define PCI_DEVICE_ID_CISCO_VIC_ENET_DYN 0x0044 /* enet dynamic vnic */ |
| #define PCI_DEVICE_ID_CISCO_VIC_ENET_VF 0x0071 /* enet SRIOV VF */ |
| |
| #define RX_COPYBREAK_DEFAULT 256 |
| |
| /* Supported devices */ |
| static const struct pci_device_id enic_id_table[] = { |
| { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET) }, |
| { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_DYN) }, |
| { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_VF) }, |
| { 0, } /* end of table */ |
| }; |
| |
| MODULE_DESCRIPTION(DRV_DESCRIPTION); |
| MODULE_AUTHOR("Scott Feldman <scofeldm@cisco.com>"); |
| MODULE_LICENSE("GPL"); |
| MODULE_VERSION(DRV_VERSION); |
| MODULE_DEVICE_TABLE(pci, enic_id_table); |
| |
| #define ENIC_LARGE_PKT_THRESHOLD 1000 |
| #define ENIC_MAX_COALESCE_TIMERS 10 |
| /* Interrupt moderation table, which will be used to decide the |
| * coalescing timer values |
| * {rx_rate in Mbps, mapping percentage of the range} |
| */ |
| static struct enic_intr_mod_table mod_table[ENIC_MAX_COALESCE_TIMERS + 1] = { |
| {4000, 0}, |
| {4400, 10}, |
| {5060, 20}, |
| {5230, 30}, |
| {5540, 40}, |
| {5820, 50}, |
| {6120, 60}, |
| {6435, 70}, |
| {6745, 80}, |
| {7000, 90}, |
| {0xFFFFFFFF, 100} |
| }; |
| |
| /* This table helps the driver to pick different ranges for rx coalescing |
| * timer depending on the link speed. |
| */ |
| static struct enic_intr_mod_range mod_range[ENIC_MAX_LINK_SPEEDS] = { |
| {0, 0}, /* 0 - 4 Gbps */ |
| {0, 3}, /* 4 - 10 Gbps */ |
| {3, 6}, /* 10 - 40 Gbps */ |
| }; |
| |
| static void enic_init_affinity_hint(struct enic *enic) |
| { |
| int numa_node = dev_to_node(&enic->pdev->dev); |
| int i; |
| |
| for (i = 0; i < enic->intr_count; i++) { |
| if (enic_is_err_intr(enic, i) || enic_is_notify_intr(enic, i) || |
| (enic->msix[i].affinity_mask && |
| !cpumask_empty(enic->msix[i].affinity_mask))) |
| continue; |
| if (zalloc_cpumask_var(&enic->msix[i].affinity_mask, |
| GFP_KERNEL)) |
| cpumask_set_cpu(cpumask_local_spread(i, numa_node), |
| enic->msix[i].affinity_mask); |
| } |
| } |
| |
| static void enic_free_affinity_hint(struct enic *enic) |
| { |
| int i; |
| |
| for (i = 0; i < enic->intr_count; i++) { |
| if (enic_is_err_intr(enic, i) || enic_is_notify_intr(enic, i)) |
| continue; |
| free_cpumask_var(enic->msix[i].affinity_mask); |
| } |
| } |
| |
| static void enic_set_affinity_hint(struct enic *enic) |
| { |
| int i; |
| int err; |
| |
| for (i = 0; i < enic->intr_count; i++) { |
| if (enic_is_err_intr(enic, i) || |
| enic_is_notify_intr(enic, i) || |
| !enic->msix[i].affinity_mask || |
| cpumask_empty(enic->msix[i].affinity_mask)) |
| continue; |
| err = irq_set_affinity_hint(enic->msix_entry[i].vector, |
| enic->msix[i].affinity_mask); |
| if (err) |
| netdev_warn(enic->netdev, "irq_set_affinity_hint failed, err %d\n", |
| err); |
| } |
| |
| for (i = 0; i < enic->wq_count; i++) { |
| int wq_intr = enic_msix_wq_intr(enic, i); |
| |
| if (enic->msix[wq_intr].affinity_mask && |
| !cpumask_empty(enic->msix[wq_intr].affinity_mask)) |
| netif_set_xps_queue(enic->netdev, |
| enic->msix[wq_intr].affinity_mask, |
| i); |
| } |
| } |
| |
| static void enic_unset_affinity_hint(struct enic *enic) |
| { |
| int i; |
| |
| for (i = 0; i < enic->intr_count; i++) |
| irq_set_affinity_hint(enic->msix_entry[i].vector, NULL); |
| } |
| |
| int enic_is_dynamic(struct enic *enic) |
| { |
| return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_DYN; |
| } |
| |
| int enic_sriov_enabled(struct enic *enic) |
| { |
| return (enic->priv_flags & ENIC_SRIOV_ENABLED) ? 1 : 0; |
| } |
| |
| static int enic_is_sriov_vf(struct enic *enic) |
| { |
| return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_VF; |
| } |
| |
| int enic_is_valid_vf(struct enic *enic, int vf) |
| { |
| #ifdef CONFIG_PCI_IOV |
| return vf >= 0 && vf < enic->num_vfs; |
| #else |
| return 0; |
| #endif |
| } |
| |
| static void enic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf) |
| { |
| struct enic *enic = vnic_dev_priv(wq->vdev); |
| |
| if (buf->sop) |
| pci_unmap_single(enic->pdev, buf->dma_addr, |
| buf->len, PCI_DMA_TODEVICE); |
| else |
| pci_unmap_page(enic->pdev, buf->dma_addr, |
| buf->len, PCI_DMA_TODEVICE); |
| |
| if (buf->os_buf) |
| dev_kfree_skb_any(buf->os_buf); |
| } |
| |
| static void enic_wq_free_buf(struct vnic_wq *wq, |
| struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque) |
| { |
| enic_free_wq_buf(wq, buf); |
| } |
| |
| static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc, |
| u8 type, u16 q_number, u16 completed_index, void *opaque) |
| { |
| struct enic *enic = vnic_dev_priv(vdev); |
| |
| spin_lock(&enic->wq_lock[q_number]); |
| |
| vnic_wq_service(&enic->wq[q_number], cq_desc, |
| completed_index, enic_wq_free_buf, |
| opaque); |
| |
| if (netif_tx_queue_stopped(netdev_get_tx_queue(enic->netdev, q_number)) && |
| vnic_wq_desc_avail(&enic->wq[q_number]) >= |
| (MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS)) |
| netif_wake_subqueue(enic->netdev, q_number); |
| |
| spin_unlock(&enic->wq_lock[q_number]); |
| |
| return 0; |
| } |
| |
| static bool enic_log_q_error(struct enic *enic) |
| { |
| unsigned int i; |
| u32 error_status; |
| bool err = false; |
| |
| for (i = 0; i < enic->wq_count; i++) { |
| error_status = vnic_wq_error_status(&enic->wq[i]); |
| err |= error_status; |
| if (error_status) |
| netdev_err(enic->netdev, "WQ[%d] error_status %d\n", |
| i, error_status); |
| } |
| |
| for (i = 0; i < enic->rq_count; i++) { |
| error_status = vnic_rq_error_status(&enic->rq[i]); |
| err |= error_status; |
| if (error_status) |
| netdev_err(enic->netdev, "RQ[%d] error_status %d\n", |
| i, error_status); |
| } |
| |
| return err; |
| } |
| |
| static void enic_msglvl_check(struct enic *enic) |
| { |
| u32 msg_enable = vnic_dev_msg_lvl(enic->vdev); |
| |
| if (msg_enable != enic->msg_enable) { |
| netdev_info(enic->netdev, "msg lvl changed from 0x%x to 0x%x\n", |
| enic->msg_enable, msg_enable); |
| enic->msg_enable = msg_enable; |
| } |
| } |
| |
| static void enic_mtu_check(struct enic *enic) |
| { |
| u32 mtu = vnic_dev_mtu(enic->vdev); |
| struct net_device *netdev = enic->netdev; |
| |
| if (mtu && mtu != enic->port_mtu) { |
| enic->port_mtu = mtu; |
| if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) { |
| mtu = max_t(int, ENIC_MIN_MTU, |
| min_t(int, ENIC_MAX_MTU, mtu)); |
| if (mtu != netdev->mtu) |
| schedule_work(&enic->change_mtu_work); |
| } else { |
| if (mtu < netdev->mtu) |
| netdev_warn(netdev, |
| "interface MTU (%d) set higher " |
| "than switch port MTU (%d)\n", |
| netdev->mtu, mtu); |
| } |
| } |
| } |
| |
| static void enic_link_check(struct enic *enic) |
| { |
| int link_status = vnic_dev_link_status(enic->vdev); |
| int carrier_ok = netif_carrier_ok(enic->netdev); |
| |
| if (link_status && !carrier_ok) { |
| netdev_info(enic->netdev, "Link UP\n"); |
| netif_carrier_on(enic->netdev); |
| } else if (!link_status && carrier_ok) { |
| netdev_info(enic->netdev, "Link DOWN\n"); |
| netif_carrier_off(enic->netdev); |
| } |
| } |
| |
| static void enic_notify_check(struct enic *enic) |
| { |
| enic_msglvl_check(enic); |
| enic_mtu_check(enic); |
| enic_link_check(enic); |
| } |
| |
| #define ENIC_TEST_INTR(pba, i) (pba & (1 << i)) |
| |
| static irqreturn_t enic_isr_legacy(int irq, void *data) |
| { |
| struct net_device *netdev = data; |
| struct enic *enic = netdev_priv(netdev); |
| unsigned int io_intr = enic_legacy_io_intr(); |
| unsigned int err_intr = enic_legacy_err_intr(); |
| unsigned int notify_intr = enic_legacy_notify_intr(); |
| u32 pba; |
| |
| vnic_intr_mask(&enic->intr[io_intr]); |
| |
| pba = vnic_intr_legacy_pba(enic->legacy_pba); |
| if (!pba) { |
| vnic_intr_unmask(&enic->intr[io_intr]); |
| return IRQ_NONE; /* not our interrupt */ |
| } |
| |
| if (ENIC_TEST_INTR(pba, notify_intr)) { |
| enic_notify_check(enic); |
| vnic_intr_return_all_credits(&enic->intr[notify_intr]); |
| } |
| |
| if (ENIC_TEST_INTR(pba, err_intr)) { |
| vnic_intr_return_all_credits(&enic->intr[err_intr]); |
| enic_log_q_error(enic); |
| /* schedule recovery from WQ/RQ error */ |
| schedule_work(&enic->reset); |
| return IRQ_HANDLED; |
| } |
| |
| if (ENIC_TEST_INTR(pba, io_intr)) |
| napi_schedule_irqoff(&enic->napi[0]); |
| else |
| vnic_intr_unmask(&enic->intr[io_intr]); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static irqreturn_t enic_isr_msi(int irq, void *data) |
| { |
| struct enic *enic = data; |
| |
| /* With MSI, there is no sharing of interrupts, so this is |
| * our interrupt and there is no need to ack it. The device |
| * is not providing per-vector masking, so the OS will not |
| * write to PCI config space to mask/unmask the interrupt. |
| * We're using mask_on_assertion for MSI, so the device |
| * automatically masks the interrupt when the interrupt is |
| * generated. Later, when exiting polling, the interrupt |
| * will be unmasked (see enic_poll). |
| * |
| * Also, the device uses the same PCIe Traffic Class (TC) |
| * for Memory Write data and MSI, so there are no ordering |
| * issues; the MSI will always arrive at the Root Complex |
| * _after_ corresponding Memory Writes (i.e. descriptor |
| * writes). |
| */ |
| |
| napi_schedule_irqoff(&enic->napi[0]); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static irqreturn_t enic_isr_msix(int irq, void *data) |
| { |
| struct napi_struct *napi = data; |
| |
| napi_schedule_irqoff(napi); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static irqreturn_t enic_isr_msix_err(int irq, void *data) |
| { |
| struct enic *enic = data; |
| unsigned int intr = enic_msix_err_intr(enic); |
| |
| vnic_intr_return_all_credits(&enic->intr[intr]); |
| |
| if (enic_log_q_error(enic)) |
| /* schedule recovery from WQ/RQ error */ |
| schedule_work(&enic->reset); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static irqreturn_t enic_isr_msix_notify(int irq, void *data) |
| { |
| struct enic *enic = data; |
| unsigned int intr = enic_msix_notify_intr(enic); |
| |
| enic_notify_check(enic); |
| vnic_intr_return_all_credits(&enic->intr[intr]); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static int enic_queue_wq_skb_cont(struct enic *enic, struct vnic_wq *wq, |
| struct sk_buff *skb, unsigned int len_left, |
| int loopback) |
| { |
| const skb_frag_t *frag; |
| dma_addr_t dma_addr; |
| |
| /* Queue additional data fragments */ |
| for (frag = skb_shinfo(skb)->frags; len_left; frag++) { |
| len_left -= skb_frag_size(frag); |
| dma_addr = skb_frag_dma_map(&enic->pdev->dev, frag, 0, |
| skb_frag_size(frag), |
| DMA_TO_DEVICE); |
| if (unlikely(enic_dma_map_check(enic, dma_addr))) |
| return -ENOMEM; |
| enic_queue_wq_desc_cont(wq, skb, dma_addr, skb_frag_size(frag), |
| (len_left == 0), /* EOP? */ |
| loopback); |
| } |
| |
| return 0; |
| } |
| |
| static int enic_queue_wq_skb_vlan(struct enic *enic, struct vnic_wq *wq, |
| struct sk_buff *skb, int vlan_tag_insert, |
| unsigned int vlan_tag, int loopback) |
| { |
| unsigned int head_len = skb_headlen(skb); |
| unsigned int len_left = skb->len - head_len; |
| int eop = (len_left == 0); |
| dma_addr_t dma_addr; |
| int err = 0; |
| |
| dma_addr = pci_map_single(enic->pdev, skb->data, head_len, |
| PCI_DMA_TODEVICE); |
| if (unlikely(enic_dma_map_check(enic, dma_addr))) |
| return -ENOMEM; |
| |
| /* Queue the main skb fragment. The fragments are no larger |
| * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less |
| * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor |
| * per fragment is queued. |
| */ |
| enic_queue_wq_desc(wq, skb, dma_addr, head_len, vlan_tag_insert, |
| vlan_tag, eop, loopback); |
| |
| if (!eop) |
| err = enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback); |
| |
| return err; |
| } |
| |
| static int enic_queue_wq_skb_csum_l4(struct enic *enic, struct vnic_wq *wq, |
| struct sk_buff *skb, int vlan_tag_insert, |
| unsigned int vlan_tag, int loopback) |
| { |
| unsigned int head_len = skb_headlen(skb); |
| unsigned int len_left = skb->len - head_len; |
| unsigned int hdr_len = skb_checksum_start_offset(skb); |
| unsigned int csum_offset = hdr_len + skb->csum_offset; |
| int eop = (len_left == 0); |
| dma_addr_t dma_addr; |
| int err = 0; |
| |
| dma_addr = pci_map_single(enic->pdev, skb->data, head_len, |
| PCI_DMA_TODEVICE); |
| if (unlikely(enic_dma_map_check(enic, dma_addr))) |
| return -ENOMEM; |
| |
| /* Queue the main skb fragment. The fragments are no larger |
| * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less |
| * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor |
| * per fragment is queued. |
| */ |
| enic_queue_wq_desc_csum_l4(wq, skb, dma_addr, head_len, csum_offset, |
| hdr_len, vlan_tag_insert, vlan_tag, eop, |
| loopback); |
| |
| if (!eop) |
| err = enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback); |
| |
| return err; |
| } |
| |
| static int enic_queue_wq_skb_tso(struct enic *enic, struct vnic_wq *wq, |
| struct sk_buff *skb, unsigned int mss, |
| int vlan_tag_insert, unsigned int vlan_tag, |
| int loopback) |
| { |
| unsigned int frag_len_left = skb_headlen(skb); |
| unsigned int len_left = skb->len - frag_len_left; |
| unsigned int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); |
| int eop = (len_left == 0); |
| unsigned int len; |
| dma_addr_t dma_addr; |
| unsigned int offset = 0; |
| skb_frag_t *frag; |
| |
| /* Preload TCP csum field with IP pseudo hdr calculated |
| * with IP length set to zero. HW will later add in length |
| * to each TCP segment resulting from the TSO. |
| */ |
| |
| if (skb->protocol == cpu_to_be16(ETH_P_IP)) { |
| ip_hdr(skb)->check = 0; |
| tcp_hdr(skb)->check = ~csum_tcpudp_magic(ip_hdr(skb)->saddr, |
| ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); |
| } else if (skb->protocol == cpu_to_be16(ETH_P_IPV6)) { |
| tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
| &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); |
| } |
| |
| /* Queue WQ_ENET_MAX_DESC_LEN length descriptors |
| * for the main skb fragment |
| */ |
| while (frag_len_left) { |
| len = min(frag_len_left, (unsigned int)WQ_ENET_MAX_DESC_LEN); |
| dma_addr = pci_map_single(enic->pdev, skb->data + offset, len, |
| PCI_DMA_TODEVICE); |
| if (unlikely(enic_dma_map_check(enic, dma_addr))) |
| return -ENOMEM; |
| enic_queue_wq_desc_tso(wq, skb, dma_addr, len, mss, hdr_len, |
| vlan_tag_insert, vlan_tag, |
| eop && (len == frag_len_left), loopback); |
| frag_len_left -= len; |
| offset += len; |
| } |
| |
| if (eop) |
| return 0; |
| |
| /* Queue WQ_ENET_MAX_DESC_LEN length descriptors |
| * for additional data fragments |
| */ |
| for (frag = skb_shinfo(skb)->frags; len_left; frag++) { |
| len_left -= skb_frag_size(frag); |
| frag_len_left = skb_frag_size(frag); |
| offset = 0; |
| |
| while (frag_len_left) { |
| len = min(frag_len_left, |
| (unsigned int)WQ_ENET_MAX_DESC_LEN); |
| dma_addr = skb_frag_dma_map(&enic->pdev->dev, frag, |
| offset, len, |
| DMA_TO_DEVICE); |
| if (unlikely(enic_dma_map_check(enic, dma_addr))) |
| return -ENOMEM; |
| enic_queue_wq_desc_cont(wq, skb, dma_addr, len, |
| (len_left == 0) && |
| (len == frag_len_left),/*EOP*/ |
| loopback); |
| frag_len_left -= len; |
| offset += len; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static inline void enic_queue_wq_skb(struct enic *enic, |
| struct vnic_wq *wq, struct sk_buff *skb) |
| { |
| unsigned int mss = skb_shinfo(skb)->gso_size; |
| unsigned int vlan_tag = 0; |
| int vlan_tag_insert = 0; |
| int loopback = 0; |
| int err; |
| |
| if (skb_vlan_tag_present(skb)) { |
| /* VLAN tag from trunking driver */ |
| vlan_tag_insert = 1; |
| vlan_tag = skb_vlan_tag_get(skb); |
| } else if (enic->loop_enable) { |
| vlan_tag = enic->loop_tag; |
| loopback = 1; |
| } |
| |
| if (mss) |
| err = enic_queue_wq_skb_tso(enic, wq, skb, mss, |
| vlan_tag_insert, vlan_tag, |
| loopback); |
| else if (skb->ip_summed == CHECKSUM_PARTIAL) |
| err = enic_queue_wq_skb_csum_l4(enic, wq, skb, vlan_tag_insert, |
| vlan_tag, loopback); |
| else |
| err = enic_queue_wq_skb_vlan(enic, wq, skb, vlan_tag_insert, |
| vlan_tag, loopback); |
| if (unlikely(err)) { |
| struct vnic_wq_buf *buf; |
| |
| buf = wq->to_use->prev; |
| /* while not EOP of previous pkt && queue not empty. |
| * For all non EOP bufs, os_buf is NULL. |
| */ |
| while (!buf->os_buf && (buf->next != wq->to_clean)) { |
| enic_free_wq_buf(wq, buf); |
| wq->ring.desc_avail++; |
| buf = buf->prev; |
| } |
| wq->to_use = buf->next; |
| dev_kfree_skb(skb); |
| } |
| } |
| |
| /* netif_tx_lock held, process context with BHs disabled, or BH */ |
| static netdev_tx_t enic_hard_start_xmit(struct sk_buff *skb, |
| struct net_device *netdev) |
| { |
| struct enic *enic = netdev_priv(netdev); |
| struct vnic_wq *wq; |
| unsigned int txq_map; |
| struct netdev_queue *txq; |
| |
| if (skb->len <= 0) { |
| dev_kfree_skb_any(skb); |
| return NETDEV_TX_OK; |
| } |
| |
| txq_map = skb_get_queue_mapping(skb) % enic->wq_count; |
| wq = &enic->wq[txq_map]; |
| txq = netdev_get_tx_queue(netdev, txq_map); |
| |
| /* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs, |
| * which is very likely. In the off chance it's going to take |
| * more than * ENIC_NON_TSO_MAX_DESC, linearize the skb. |
| */ |
| |
| if (skb_shinfo(skb)->gso_size == 0 && |
| skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC && |
| skb_linearize(skb)) { |
| dev_kfree_skb_any(skb); |
| return NETDEV_TX_OK; |
| } |
| |
| spin_lock(&enic->wq_lock[txq_map]); |
| |
| if (vnic_wq_desc_avail(wq) < |
| skb_shinfo(skb)->nr_frags + ENIC_DESC_MAX_SPLITS) { |
| netif_tx_stop_queue(txq); |
| /* This is a hard error, log it */ |
| netdev_err(netdev, "BUG! Tx ring full when queue awake!\n"); |
| spin_unlock(&enic->wq_lock[txq_map]); |
| return NETDEV_TX_BUSY; |
| } |
| |
| enic_queue_wq_skb(enic, wq, skb); |
| |
| if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS) |
| netif_tx_stop_queue(txq); |
| if (!skb->xmit_more || netif_xmit_stopped(txq)) |
| vnic_wq_doorbell(wq); |
| |
| spin_unlock(&enic->wq_lock[txq_map]); |
| |
| return NETDEV_TX_OK; |
| } |
| |
| /* dev_base_lock rwlock held, nominally process context */ |
| static struct rtnl_link_stats64 *enic_get_stats(struct net_device *netdev, |
| struct rtnl_link_stats64 *net_stats) |
| { |
| struct enic *enic = netdev_priv(netdev); |
| struct vnic_stats *stats; |
| int err; |
| |
| err = enic_dev_stats_dump(enic, &stats); |
| /* return only when pci_zalloc_consistent fails in vnic_dev_stats_dump |
| * For other failures, like devcmd failure, we return previously |
| * recorded stats. |
| */ |
| if (err == -ENOMEM) |
| return net_stats; |
| |
| net_stats->tx_packets = stats->tx.tx_frames_ok; |
| net_stats->tx_bytes = stats->tx.tx_bytes_ok; |
| net_stats->tx_errors = stats->tx.tx_errors; |
| net_stats->tx_dropped = stats->tx.tx_drops; |
| |
| net_stats->rx_packets = stats->rx.rx_frames_ok; |
| net_stats->rx_bytes = stats->rx.rx_bytes_ok; |
| net_stats->rx_errors = stats->rx.rx_errors; |
| net_stats->multicast = stats->rx.rx_multicast_frames_ok; |
| net_stats->rx_over_errors = enic->rq_truncated_pkts; |
| net_stats->rx_crc_errors = enic->rq_bad_fcs; |
| net_stats->rx_dropped = stats->rx.rx_no_bufs + stats->rx.rx_drop; |
| |
| return net_stats; |
| } |
| |
| static int enic_mc_sync(struct net_device *netdev, const u8 *mc_addr) |
| { |
| struct enic *enic = netdev_priv(netdev); |
| |
| if (enic->mc_count == ENIC_MULTICAST_PERFECT_FILTERS) { |
| unsigned int mc_count = netdev_mc_count(netdev); |
| |
| netdev_warn(netdev, "Registering only %d out of %d multicast addresses\n", |
| ENIC_MULTICAST_PERFECT_FILTERS, mc_count); |
| |
| return -ENOSPC; |
| } |
| |
| enic_dev_add_addr(enic, mc_addr); |
| enic->mc_count++; |
| |
| return 0; |
| } |
| |
| static int enic_mc_unsync(struct net_device *netdev, const u8 *mc_addr) |
| { |
| struct enic *enic = netdev_priv(netdev); |
| |
| enic_dev_del_addr(enic, mc_addr); |
| enic->mc_count--; |
| |
| return 0; |
| } |
| |
| static int enic_uc_sync(struct net_device *netdev, const u8 *uc_addr) |
| { |
| struct enic *enic = netdev_priv(netdev); |
| |
| if (enic->uc_count == ENIC_UNICAST_PERFECT_FILTERS) { |
| unsigned int uc_count = netdev_uc_count(netdev); |
| |
| netdev_warn(netdev, "Registering only %d out of %d unicast addresses\n", |
| ENIC_UNICAST_PERFECT_FILTERS, uc_count); |
| |
| return -ENOSPC; |
| } |
| |
| enic_dev_add_addr(enic, uc_addr); |
| enic->uc_count++; |
| |
| return 0; |
| } |
| |
| static int enic_uc_unsync(struct net_device *netdev, const u8 *uc_addr) |
| { |
| struct enic *enic = netdev_priv(netdev); |
| |
| enic_dev_del_addr(enic, uc_addr); |
| enic->uc_count--; |
| |
| return 0; |
| } |
| |
| void enic_reset_addr_lists(struct enic *enic) |
| { |
| struct net_device *netdev = enic->netdev; |
| |
| __dev_uc_unsync(netdev, NULL); |
| __dev_mc_unsync(netdev, NULL); |
| |
| enic->mc_count = 0; |
| enic->uc_count = 0; |
| enic->flags = 0; |
| } |
| |
| static int enic_set_mac_addr(struct net_device *netdev, char *addr) |
| { |
| struct enic *enic = netdev_priv(netdev); |
| |
| if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) { |
| if (!is_valid_ether_addr(addr) && !is_zero_ether_addr(addr)) |
| return -EADDRNOTAVAIL; |
| } else { |
| if (!is_valid_ether_addr(addr)) |
| return -EADDRNOTAVAIL; |
| } |
| |
| memcpy(netdev->dev_addr, addr, netdev->addr_len); |
| |
| return 0; |
| } |
| |
| static int enic_set_mac_address_dynamic(struct net_device *netdev, void *p) |
| { |
| struct enic *enic = netdev_priv(netdev); |
| struct sockaddr *saddr = p; |
| char *addr = saddr->sa_data; |
| int err; |
| |
| if (netif_running(enic->netdev)) { |
| err = enic_dev_del_station_addr(enic); |
| if (err) |
| return err; |
| } |
| |
| err = enic_set_mac_addr(netdev, addr); |
| if (err) |
| return err; |
| |
| if (netif_running(enic->netdev)) { |
| err = enic_dev_add_station_addr(enic); |
| if (err) |
| return err; |
| } |
| |
| return err; |
| } |
| |
| static int enic_set_mac_address(struct net_device *netdev, void *p) |
| { |
| struct sockaddr *saddr = p; |
| char *addr = saddr->sa_data; |
| struct enic *enic = netdev_priv(netdev); |
| int err; |
| |
| err = enic_dev_del_station_addr(enic); |
| if (err) |
| return err; |
| |
| err = enic_set_mac_addr(netdev, addr); |
| if (err) |
| return err; |
| |
| return enic_dev_add_station_addr(enic); |
| } |
| |
| /* netif_tx_lock held, BHs disabled */ |
| static void enic_set_rx_mode(struct net_device *netdev) |
| { |
| struct enic *enic = netdev_priv(netdev); |
| int directed = 1; |
| int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0; |
| int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0; |
| int promisc = (netdev->flags & IFF_PROMISC) || |
| netdev_uc_count(netdev) > ENIC_UNICAST_PERFECT_FILTERS; |
| int allmulti = (netdev->flags & IFF_ALLMULTI) || |
| netdev_mc_count(netdev) > ENIC_MULTICAST_PERFECT_FILTERS; |
| unsigned int flags = netdev->flags | |
| (allmulti ? IFF_ALLMULTI : 0) | |
| (promisc ? IFF_PROMISC : 0); |
| |
| if (enic->flags != flags) { |
| enic->flags = flags; |
| enic_dev_packet_filter(enic, directed, |
| multicast, broadcast, promisc, allmulti); |
| } |
| |
| if (!promisc) { |
| __dev_uc_sync(netdev, enic_uc_sync, enic_uc_unsync); |
| if (!allmulti) |
| __dev_mc_sync(netdev, enic_mc_sync, enic_mc_unsync); |
| } |
| } |
| |
| /* netif_tx_lock held, BHs disabled */ |
| static void enic_tx_timeout(struct net_device *netdev) |
| { |
| struct enic *enic = netdev_priv(netdev); |
| schedule_work(&enic->tx_hang_reset); |
| } |
| |
| static int enic_set_vf_mac(struct net_device *netdev, int vf, u8 *mac) |
| { |
| struct enic *enic = netdev_priv(netdev); |
| struct enic_port_profile *pp; |
| int err; |
| |
| ENIC_PP_BY_INDEX(enic, vf, pp, &err); |
| if (err) |
| return err; |
| |
| if (is_valid_ether_addr(mac) || is_zero_ether_addr(mac)) { |
| if (vf == PORT_SELF_VF) { |
| memcpy(pp->vf_mac, mac, ETH_ALEN); |
| return 0; |
| } else { |
| /* |
| * For sriov vf's set the mac in hw |
| */ |
| ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic, |
| vnic_dev_set_mac_addr, mac); |
| return enic_dev_status_to_errno(err); |
| } |
| } else |
| return -EINVAL; |
| } |
| |
| static int enic_set_vf_port(struct net_device *netdev, int vf, |
| struct nlattr *port[]) |
| { |
| struct enic *enic = netdev_priv(netdev); |
| struct enic_port_profile prev_pp; |
| struct enic_port_profile *pp; |
| int err = 0, restore_pp = 1; |
| |
| ENIC_PP_BY_INDEX(enic, vf, pp, &err); |
| if (err) |
| return err; |
| |
| if (!port[IFLA_PORT_REQUEST]) |
| return -EOPNOTSUPP; |
| |
| memcpy(&prev_pp, pp, sizeof(*enic->pp)); |
| memset(pp, 0, sizeof(*enic->pp)); |
| |
| pp->set |= ENIC_SET_REQUEST; |
| pp->request = nla_get_u8(port[IFLA_PORT_REQUEST]); |
| |
| if (port[IFLA_PORT_PROFILE]) { |
| pp->set |= ENIC_SET_NAME; |
| memcpy(pp->name, nla_data(port[IFLA_PORT_PROFILE]), |
| PORT_PROFILE_MAX); |
| } |
| |
| if (port[IFLA_PORT_INSTANCE_UUID]) { |
| pp->set |= ENIC_SET_INSTANCE; |
| memcpy(pp->instance_uuid, |
| nla_data(port[IFLA_PORT_INSTANCE_UUID]), PORT_UUID_MAX); |
| } |
| |
| if (port[IFLA_PORT_HOST_UUID]) { |
| pp->set |= ENIC_SET_HOST; |
| memcpy(pp->host_uuid, |
| nla_data(port[IFLA_PORT_HOST_UUID]), PORT_UUID_MAX); |
| } |
| |
| if (vf == PORT_SELF_VF) { |
| /* Special case handling: mac came from IFLA_VF_MAC */ |
| if (!is_zero_ether_addr(prev_pp.vf_mac)) |
| memcpy(pp->mac_addr, prev_pp.vf_mac, ETH_ALEN); |
| |
| if (is_zero_ether_addr(netdev->dev_addr)) |
| eth_hw_addr_random(netdev); |
| } else { |
| /* SR-IOV VF: get mac from adapter */ |
| ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic, |
| vnic_dev_get_mac_addr, pp->mac_addr); |
| if (err) { |
| netdev_err(netdev, "Error getting mac for vf %d\n", vf); |
| memcpy(pp, &prev_pp, sizeof(*pp)); |
| return enic_dev_status_to_errno(err); |
| } |
| } |
| |
| err = enic_process_set_pp_request(enic, vf, &prev_pp, &restore_pp); |
| if (err) { |
| if (restore_pp) { |
| /* Things are still the way they were: Implicit |
| * DISASSOCIATE failed |
| */ |
| memcpy(pp, &prev_pp, sizeof(*pp)); |
| } else { |
| memset(pp, 0, sizeof(*pp)); |
| if (vf == PORT_SELF_VF) |
| eth_zero_addr(netdev->dev_addr); |
| } |
| } else { |
| /* Set flag to indicate that the port assoc/disassoc |
| * request has been sent out to fw |
| */ |
| pp->set |= ENIC_PORT_REQUEST_APPLIED; |
| |
| /* If DISASSOCIATE, clean up all assigned/saved macaddresses */ |
| if (pp->request == PORT_REQUEST_DISASSOCIATE) { |
| eth_zero_addr(pp->mac_addr); |
| if (vf == PORT_SELF_VF) |
| eth_zero_addr(netdev->dev_addr); |
| } |
| } |
| |
| if (vf == PORT_SELF_VF) |
| eth_zero_addr(pp->vf_mac); |
| |
| return err; |
| } |
| |
| static int enic_get_vf_port(struct net_device *netdev, int vf, |
| struct sk_buff *skb) |
| { |
| struct enic *enic = netdev_priv(netdev); |
| u16 response = PORT_PROFILE_RESPONSE_SUCCESS; |
| struct enic_port_profile *pp; |
| int err; |
| |
| ENIC_PP_BY_INDEX(enic, vf, pp, &err); |
| if (err) |
| return err; |
| |
| if (!(pp->set & ENIC_PORT_REQUEST_APPLIED)) |
| return -ENODATA; |
| |
| err = enic_process_get_pp_request(enic, vf, pp->request, &response); |
| if (err) |
| return err; |
| |
| if (nla_put_u16(skb, IFLA_PORT_REQUEST, pp->request) || |
| nla_put_u16(skb, IFLA_PORT_RESPONSE, response) || |
| ((pp->set & ENIC_SET_NAME) && |
| nla_put(skb, IFLA_PORT_PROFILE, PORT_PROFILE_MAX, pp->name)) || |
| ((pp->set & ENIC_SET_INSTANCE) && |
| nla_put(skb, IFLA_PORT_INSTANCE_UUID, PORT_UUID_MAX, |
| pp->instance_uuid)) || |
| ((pp->set & ENIC_SET_HOST) && |
| nla_put(skb, IFLA_PORT_HOST_UUID, PORT_UUID_MAX, pp->host_uuid))) |
| goto nla_put_failure; |
| return 0; |
| |
| nla_put_failure: |
| return -EMSGSIZE; |
| } |
| |
| static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf) |
| { |
| struct enic *enic = vnic_dev_priv(rq->vdev); |
| |
| if (!buf->os_buf) |
| return; |
| |
| pci_unmap_single(enic->pdev, buf->dma_addr, |
| buf->len, PCI_DMA_FROMDEVICE); |
| dev_kfree_skb_any(buf->os_buf); |
| buf->os_buf = NULL; |
| } |
| |
| static int enic_rq_alloc_buf(struct vnic_rq *rq) |
| { |
| struct enic *enic = vnic_dev_priv(rq->vdev); |
| struct net_device *netdev = enic->netdev; |
| struct sk_buff *skb; |
| unsigned int len = netdev->mtu + VLAN_ETH_HLEN; |
| unsigned int os_buf_index = 0; |
| dma_addr_t dma_addr; |
| struct vnic_rq_buf *buf = rq->to_use; |
| |
| if (buf->os_buf) { |
| enic_queue_rq_desc(rq, buf->os_buf, os_buf_index, buf->dma_addr, |
| buf->len); |
| |
| return 0; |
| } |
| skb = netdev_alloc_skb_ip_align(netdev, len); |
| if (!skb) |
| return -ENOMEM; |
| |
| dma_addr = pci_map_single(enic->pdev, skb->data, len, |
| PCI_DMA_FROMDEVICE); |
| if (unlikely(enic_dma_map_check(enic, dma_addr))) { |
| dev_kfree_skb(skb); |
| return -ENOMEM; |
| } |
| |
| enic_queue_rq_desc(rq, skb, os_buf_index, |
| dma_addr, len); |
| |
| return 0; |
| } |
| |
| static void enic_intr_update_pkt_size(struct vnic_rx_bytes_counter *pkt_size, |
| u32 pkt_len) |
| { |
| if (ENIC_LARGE_PKT_THRESHOLD <= pkt_len) |
| pkt_size->large_pkt_bytes_cnt += pkt_len; |
| else |
| pkt_size->small_pkt_bytes_cnt += pkt_len; |
| } |
| |
| static bool enic_rxcopybreak(struct net_device *netdev, struct sk_buff **skb, |
| struct vnic_rq_buf *buf, u16 len) |
| { |
| struct enic *enic = netdev_priv(netdev); |
| struct sk_buff *new_skb; |
| |
| if (len > enic->rx_copybreak) |
| return false; |
| new_skb = netdev_alloc_skb_ip_align(netdev, len); |
| if (!new_skb) |
| return false; |
| pci_dma_sync_single_for_cpu(enic->pdev, buf->dma_addr, len, |
| DMA_FROM_DEVICE); |
| memcpy(new_skb->data, (*skb)->data, len); |
| *skb = new_skb; |
| |
| return true; |
| } |
| |
| static void enic_rq_indicate_buf(struct vnic_rq *rq, |
| struct cq_desc *cq_desc, struct vnic_rq_buf *buf, |
| int skipped, void *opaque) |
| { |
| struct enic *enic = vnic_dev_priv(rq->vdev); |
| struct net_device *netdev = enic->netdev; |
| struct sk_buff *skb; |
| struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)]; |
| |
| u8 type, color, eop, sop, ingress_port, vlan_stripped; |
| u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof; |
| u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok; |
| u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc; |
| u8 packet_error; |
| u16 q_number, completed_index, bytes_written, vlan_tci, checksum; |
| u32 rss_hash; |
| |
| if (skipped) |
| return; |
| |
| skb = buf->os_buf; |
| |
| cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc, |
| &type, &color, &q_number, &completed_index, |
| &ingress_port, &fcoe, &eop, &sop, &rss_type, |
| &csum_not_calc, &rss_hash, &bytes_written, |
| &packet_error, &vlan_stripped, &vlan_tci, &checksum, |
| &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error, |
| &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp, |
| &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment, |
| &fcs_ok); |
| |
| if (packet_error) { |
| |
| if (!fcs_ok) { |
| if (bytes_written > 0) |
| enic->rq_bad_fcs++; |
| else if (bytes_written == 0) |
| enic->rq_truncated_pkts++; |
| } |
| |
| pci_unmap_single(enic->pdev, buf->dma_addr, buf->len, |
| PCI_DMA_FROMDEVICE); |
| dev_kfree_skb_any(skb); |
| buf->os_buf = NULL; |
| |
| return; |
| } |
| |
| if (eop && bytes_written > 0) { |
| |
| /* Good receive |
| */ |
| |
| if (!enic_rxcopybreak(netdev, &skb, buf, bytes_written)) { |
| buf->os_buf = NULL; |
| pci_unmap_single(enic->pdev, buf->dma_addr, buf->len, |
| PCI_DMA_FROMDEVICE); |
| } |
| prefetch(skb->data - NET_IP_ALIGN); |
| |
| skb_put(skb, bytes_written); |
| skb->protocol = eth_type_trans(skb, netdev); |
| skb_record_rx_queue(skb, q_number); |
| if (netdev->features & NETIF_F_RXHASH) { |
| skb_set_hash(skb, rss_hash, |
| (rss_type & |
| (NIC_CFG_RSS_HASH_TYPE_TCP_IPV6_EX | |
| NIC_CFG_RSS_HASH_TYPE_TCP_IPV6 | |
| NIC_CFG_RSS_HASH_TYPE_TCP_IPV4)) ? |
| PKT_HASH_TYPE_L4 : PKT_HASH_TYPE_L3); |
| } |
| |
| /* Hardware does not provide whole packet checksum. It only |
| * provides pseudo checksum. Since hw validates the packet |
| * checksum but not provide us the checksum value. use |
| * CHECSUM_UNNECESSARY. |
| */ |
| if ((netdev->features & NETIF_F_RXCSUM) && tcp_udp_csum_ok && |
| ipv4_csum_ok) |
| skb->ip_summed = CHECKSUM_UNNECESSARY; |
| |
| if (vlan_stripped) |
| __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tci); |
| |
| skb_mark_napi_id(skb, &enic->napi[rq->index]); |
| if (enic_poll_busy_polling(rq) || |
| !(netdev->features & NETIF_F_GRO)) |
| netif_receive_skb(skb); |
| else |
| napi_gro_receive(&enic->napi[q_number], skb); |
| if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) |
| enic_intr_update_pkt_size(&cq->pkt_size_counter, |
| bytes_written); |
| } else { |
| |
| /* Buffer overflow |
| */ |
| |
| pci_unmap_single(enic->pdev, buf->dma_addr, buf->len, |
| PCI_DMA_FROMDEVICE); |
| dev_kfree_skb_any(skb); |
| buf->os_buf = NULL; |
| } |
| } |
| |
| static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc, |
| u8 type, u16 q_number, u16 completed_index, void *opaque) |
| { |
| struct enic *enic = vnic_dev_priv(vdev); |
| |
| vnic_rq_service(&enic->rq[q_number], cq_desc, |
| completed_index, VNIC_RQ_RETURN_DESC, |
| enic_rq_indicate_buf, opaque); |
| |
| return 0; |
| } |
| |
| static void enic_set_int_moderation(struct enic *enic, struct vnic_rq *rq) |
| { |
| unsigned int intr = enic_msix_rq_intr(enic, rq->index); |
| struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)]; |
| u32 timer = cq->tobe_rx_coal_timeval; |
| |
| if (cq->tobe_rx_coal_timeval != cq->cur_rx_coal_timeval) { |
| vnic_intr_coalescing_timer_set(&enic->intr[intr], timer); |
| cq->cur_rx_coal_timeval = cq->tobe_rx_coal_timeval; |
| } |
| } |
| |
| static void enic_calc_int_moderation(struct enic *enic, struct vnic_rq *rq) |
| { |
| struct enic_rx_coal *rx_coal = &enic->rx_coalesce_setting; |
| struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)]; |
| struct vnic_rx_bytes_counter *pkt_size_counter = &cq->pkt_size_counter; |
| int index; |
| u32 timer; |
| u32 range_start; |
| u32 traffic; |
| u64 delta; |
| ktime_t now = ktime_get(); |
| |
| delta = ktime_us_delta(now, cq->prev_ts); |
| if (delta < ENIC_AIC_TS_BREAK) |
| return; |
| cq->prev_ts = now; |
| |
| traffic = pkt_size_counter->large_pkt_bytes_cnt + |
| pkt_size_counter->small_pkt_bytes_cnt; |
| /* The table takes Mbps |
| * traffic *= 8 => bits |
| * traffic *= (10^6 / delta) => bps |
| * traffic /= 10^6 => Mbps |
| * |
| * Combining, traffic *= (8 / delta) |
| */ |
| |
| traffic <<= 3; |
| traffic = delta > UINT_MAX ? 0 : traffic / (u32)delta; |
| |
| for (index = 0; index < ENIC_MAX_COALESCE_TIMERS; index++) |
| if (traffic < mod_table[index].rx_rate) |
| break; |
| range_start = (pkt_size_counter->small_pkt_bytes_cnt > |
| pkt_size_counter->large_pkt_bytes_cnt << 1) ? |
| rx_coal->small_pkt_range_start : |
| rx_coal->large_pkt_range_start; |
| timer = range_start + ((rx_coal->range_end - range_start) * |
| mod_table[index].range_percent / 100); |
| /* Damping */ |
| cq->tobe_rx_coal_timeval = (timer + cq->tobe_rx_coal_timeval) >> 1; |
| |
| pkt_size_counter->large_pkt_bytes_cnt = 0; |
| pkt_size_counter->small_pkt_bytes_cnt = 0; |
| } |
| |
| static int enic_poll(struct napi_struct *napi, int budget) |
| { |
| struct net_device *netdev = napi->dev; |
| struct enic *enic = netdev_priv(netdev); |
| unsigned int cq_rq = enic_cq_rq(enic, 0); |
| unsigned int cq_wq = enic_cq_wq(enic, 0); |
| unsigned int intr = enic_legacy_io_intr(); |
| unsigned int rq_work_to_do = budget; |
| unsigned int wq_work_to_do = -1; /* no limit */ |
| unsigned int work_done, rq_work_done = 0, wq_work_done; |
| int err; |
| |
| wq_work_done = vnic_cq_service(&enic->cq[cq_wq], wq_work_to_do, |
| enic_wq_service, NULL); |
| |
| if (!enic_poll_lock_napi(&enic->rq[cq_rq])) { |
| if (wq_work_done > 0) |
| vnic_intr_return_credits(&enic->intr[intr], |
| wq_work_done, |
| 0 /* dont unmask intr */, |
| 0 /* dont reset intr timer */); |
| return budget; |
| } |
| |
| if (budget > 0) |
| rq_work_done = vnic_cq_service(&enic->cq[cq_rq], |
| rq_work_to_do, enic_rq_service, NULL); |
| |
| /* Accumulate intr event credits for this polling |
| * cycle. An intr event is the completion of a |
| * a WQ or RQ packet. |
| */ |
| |
| work_done = rq_work_done + wq_work_done; |
| |
| if (work_done > 0) |
| vnic_intr_return_credits(&enic->intr[intr], |
| work_done, |
| 0 /* don't unmask intr */, |
| 0 /* don't reset intr timer */); |
| |
| err = vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf); |
| enic_poll_unlock_napi(&enic->rq[cq_rq], napi); |
| |
| /* Buffer allocation failed. Stay in polling |
| * mode so we can try to fill the ring again. |
| */ |
| |
| if (err) |
| rq_work_done = rq_work_to_do; |
| if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) |
| /* Call the function which refreshes the intr coalescing timer |
| * value based on the traffic. |
| */ |
| enic_calc_int_moderation(enic, &enic->rq[0]); |
| |
| if (rq_work_done < rq_work_to_do) { |
| |
| /* Some work done, but not enough to stay in polling, |
| * exit polling |
| */ |
| |
| napi_complete(napi); |
| if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) |
| enic_set_int_moderation(enic, &enic->rq[0]); |
| vnic_intr_unmask(&enic->intr[intr]); |
| } |
| |
| return rq_work_done; |
| } |
| |
| #ifdef CONFIG_RFS_ACCEL |
| static void enic_free_rx_cpu_rmap(struct enic *enic) |
| { |
| free_irq_cpu_rmap(enic->netdev->rx_cpu_rmap); |
| enic->netdev->rx_cpu_rmap = NULL; |
| } |
| |
| static void enic_set_rx_cpu_rmap(struct enic *enic) |
| { |
| int i, res; |
| |
| if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX) { |
| enic->netdev->rx_cpu_rmap = alloc_irq_cpu_rmap(enic->rq_count); |
| if (unlikely(!enic->netdev->rx_cpu_rmap)) |
| return; |
| for (i = 0; i < enic->rq_count; i++) { |
| res = irq_cpu_rmap_add(enic->netdev->rx_cpu_rmap, |
| enic->msix_entry[i].vector); |
| if (unlikely(res)) { |
| enic_free_rx_cpu_rmap(enic); |
| return; |
| } |
| } |
| } |
| } |
| |
| #else |
| |
| static void enic_free_rx_cpu_rmap(struct enic *enic) |
| { |
| } |
| |
| static void enic_set_rx_cpu_rmap(struct enic *enic) |
| { |
| } |
| |
| #endif /* CONFIG_RFS_ACCEL */ |
| |
| #ifdef CONFIG_NET_RX_BUSY_POLL |
| static int enic_busy_poll(struct napi_struct *napi) |
| { |
| struct net_device *netdev = napi->dev; |
| struct enic *enic = netdev_priv(netdev); |
| unsigned int rq = (napi - &enic->napi[0]); |
| unsigned int cq = enic_cq_rq(enic, rq); |
| unsigned int intr = enic_msix_rq_intr(enic, rq); |
| unsigned int work_to_do = -1; /* clean all pkts possible */ |
| unsigned int work_done; |
| |
| if (!enic_poll_lock_poll(&enic->rq[rq])) |
| return LL_FLUSH_BUSY; |
| work_done = vnic_cq_service(&enic->cq[cq], work_to_do, |
| enic_rq_service, NULL); |
| |
| if (work_done > 0) |
| vnic_intr_return_credits(&enic->intr[intr], |
| work_done, 0, 0); |
| vnic_rq_fill(&enic->rq[rq], enic_rq_alloc_buf); |
| if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) |
| enic_calc_int_moderation(enic, &enic->rq[rq]); |
| enic_poll_unlock_poll(&enic->rq[rq]); |
| |
| return work_done; |
| } |
| #endif /* CONFIG_NET_RX_BUSY_POLL */ |
| |
| static int enic_poll_msix_wq(struct napi_struct *napi, int budget) |
| { |
| struct net_device *netdev = napi->dev; |
| struct enic *enic = netdev_priv(netdev); |
| unsigned int wq_index = (napi - &enic->napi[0]) - enic->rq_count; |
| struct vnic_wq *wq = &enic->wq[wq_index]; |
| unsigned int cq; |
| unsigned int intr; |
| unsigned int wq_work_to_do = -1; /* clean all desc possible */ |
| unsigned int wq_work_done; |
| unsigned int wq_irq; |
| |
| wq_irq = wq->index; |
| cq = enic_cq_wq(enic, wq_irq); |
| intr = enic_msix_wq_intr(enic, wq_irq); |
| wq_work_done = vnic_cq_service(&enic->cq[cq], wq_work_to_do, |
| enic_wq_service, NULL); |
| |
| vnic_intr_return_credits(&enic->intr[intr], wq_work_done, |
| 0 /* don't unmask intr */, |
| 1 /* reset intr timer */); |
| if (!wq_work_done) { |
| napi_complete(napi); |
| vnic_intr_unmask(&enic->intr[intr]); |
| return 0; |
| } |
| |
| return budget; |
| } |
| |
| static int enic_poll_msix_rq(struct napi_struct *napi, int budget) |
| { |
| struct net_device *netdev = napi->dev; |
| struct enic *enic = netdev_priv(netdev); |
| unsigned int rq = (napi - &enic->napi[0]); |
| unsigned int cq = enic_cq_rq(enic, rq); |
| unsigned int intr = enic_msix_rq_intr(enic, rq); |
| unsigned int work_to_do = budget; |
| unsigned int work_done = 0; |
| int err; |
| |
| if (!enic_poll_lock_napi(&enic->rq[rq])) |
| return budget; |
| /* Service RQ |
| */ |
| |
| if (budget > 0) |
| work_done = vnic_cq_service(&enic->cq[cq], |
| work_to_do, enic_rq_service, NULL); |
| |
| /* Return intr event credits for this polling |
| * cycle. An intr event is the completion of a |
| * RQ packet. |
| */ |
| |
| if (work_done > 0) |
| vnic_intr_return_credits(&enic->intr[intr], |
| work_done, |
| 0 /* don't unmask intr */, |
| 0 /* don't reset intr timer */); |
| |
| err = vnic_rq_fill(&enic->rq[rq], enic_rq_alloc_buf); |
| |
| /* Buffer allocation failed. Stay in polling mode |
| * so we can try to fill the ring again. |
| */ |
| |
| if (err) |
| work_done = work_to_do; |
| if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) |
| /* Call the function which refreshes the intr coalescing timer |
| * value based on the traffic. |
| */ |
| enic_calc_int_moderation(enic, &enic->rq[rq]); |
| |
| enic_poll_unlock_napi(&enic->rq[rq], napi); |
| if (work_done < work_to_do) { |
| |
| /* Some work done, but not enough to stay in polling, |
| * exit polling |
| */ |
| |
| napi_complete(napi); |
| if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) |
| enic_set_int_moderation(enic, &enic->rq[rq]); |
| vnic_intr_unmask(&enic->intr[intr]); |
| } |
| |
| return work_done; |
| } |
| |
| static void enic_notify_timer(unsigned long data) |
| { |
| struct enic *enic = (struct enic *)data; |
| |
| enic_notify_check(enic); |
| |
| mod_timer(&enic->notify_timer, |
| round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD)); |
| } |
| |
| static void enic_free_intr(struct enic *enic) |
| { |
| struct net_device *netdev = enic->netdev; |
| unsigned int i; |
| |
| enic_free_rx_cpu_rmap(enic); |
| switch (vnic_dev_get_intr_mode(enic->vdev)) { |
| case VNIC_DEV_INTR_MODE_INTX: |
| free_irq(enic->pdev->irq, netdev); |
| break; |
| case VNIC_DEV_INTR_MODE_MSI: |
| free_irq(enic->pdev->irq, enic); |
| break; |
| case VNIC_DEV_INTR_MODE_MSIX: |
| for (i = 0; i < ARRAY_SIZE(enic->msix); i++) |
| if (enic->msix[i].requested) |
| free_irq(enic->msix_entry[i].vector, |
| enic->msix[i].devid); |
| break; |
| default: |
| break; |
| } |
| } |
| |
| static int enic_request_intr(struct enic *enic) |
| { |
| struct net_device *netdev = enic->netdev; |
| unsigned int i, intr; |
| int err = 0; |
| |
| enic_set_rx_cpu_rmap(enic); |
| switch (vnic_dev_get_intr_mode(enic->vdev)) { |
| |
| case VNIC_DEV_INTR_MODE_INTX: |
| |
| err = request_irq(enic->pdev->irq, enic_isr_legacy, |
| IRQF_SHARED, netdev->name, netdev); |
| break; |
| |
| case VNIC_DEV_INTR_MODE_MSI: |
| |
| err = request_irq(enic->pdev->irq, enic_isr_msi, |
| 0, netdev->name, enic); |
| break; |
| |
| case VNIC_DEV_INTR_MODE_MSIX: |
| |
| for (i = 0; i < enic->rq_count; i++) { |
| intr = enic_msix_rq_intr(enic, i); |
| snprintf(enic->msix[intr].devname, |
| sizeof(enic->msix[intr].devname), |
| "%.11s-rx-%d", netdev->name, i); |
| enic->msix[intr].isr = enic_isr_msix; |
| enic->msix[intr].devid = &enic->napi[i]; |
| } |
| |
| for (i = 0; i < enic->wq_count; i++) { |
| int wq = enic_cq_wq(enic, i); |
| |
| intr = enic_msix_wq_intr(enic, i); |
| snprintf(enic->msix[intr].devname, |
| sizeof(enic->msix[intr].devname), |
| "%.11s-tx-%d", netdev->name, i); |
| enic->msix[intr].isr = enic_isr_msix; |
| enic->msix[intr].devid = &enic->napi[wq]; |
| } |
| |
| intr = enic_msix_err_intr(enic); |
| snprintf(enic->msix[intr].devname, |
| sizeof(enic->msix[intr].devname), |
| "%.11s-err", netdev->name); |
| enic->msix[intr].isr = enic_isr_msix_err; |
| enic->msix[intr].devid = enic; |
| |
| intr = enic_msix_notify_intr(enic); |
| snprintf(enic->msix[intr].devname, |
| sizeof(enic->msix[intr].devname), |
| "%.11s-notify", netdev->name); |
| enic->msix[intr].isr = enic_isr_msix_notify; |
| enic->msix[intr].devid = enic; |
| |
| for (i = 0; i < ARRAY_SIZE(enic->msix); i++) |
| enic->msix[i].requested = 0; |
| |
| for (i = 0; i < enic->intr_count; i++) { |
| err = request_irq(enic->msix_entry[i].vector, |
| enic->msix[i].isr, 0, |
| enic->msix[i].devname, |
| enic->msix[i].devid); |
| if (err) { |
| enic_free_intr(enic); |
| break; |
| } |
| enic->msix[i].requested = 1; |
| } |
| |
| break; |
| |
| default: |
| break; |
| } |
| |
| return err; |
| } |
| |
| static void enic_synchronize_irqs(struct enic *enic) |
| { |
| unsigned int i; |
| |
| switch (vnic_dev_get_intr_mode(enic->vdev)) { |
| case VNIC_DEV_INTR_MODE_INTX: |
| case VNIC_DEV_INTR_MODE_MSI: |
| synchronize_irq(enic->pdev->irq); |
| break; |
| case VNIC_DEV_INTR_MODE_MSIX: |
| for (i = 0; i < enic->intr_count; i++) |
| synchronize_irq(enic->msix_entry[i].vector); |
| break; |
| default: |
| break; |
| } |
| } |
| |
| static void enic_set_rx_coal_setting(struct enic *enic) |
| { |
| unsigned int speed; |
| int index = -1; |
| struct enic_rx_coal *rx_coal = &enic->rx_coalesce_setting; |
| |
| /* 1. Read the link speed from fw |
| * 2. Pick the default range for the speed |
| * 3. Update it in enic->rx_coalesce_setting |
| */ |
| speed = vnic_dev_port_speed(enic->vdev); |
| if (ENIC_LINK_SPEED_10G < speed) |
| index = ENIC_LINK_40G_INDEX; |
| else if (ENIC_LINK_SPEED_4G < speed) |
| index = ENIC_LINK_10G_INDEX; |
| else |
| index = ENIC_LINK_4G_INDEX; |
| |
| rx_coal->small_pkt_range_start = mod_range[index].small_pkt_range_start; |
| rx_coal->large_pkt_range_start = mod_range[index].large_pkt_range_start; |
| rx_coal->range_end = ENIC_RX_COALESCE_RANGE_END; |
| |
| /* Start with the value provided by UCSM */ |
| for (index = 0; index < enic->rq_count; index++) |
| enic->cq[index].cur_rx_coal_timeval = |
| enic->config.intr_timer_usec; |
| |
| rx_coal->use_adaptive_rx_coalesce = 1; |
| } |
| |
| static int enic_dev_notify_set(struct enic *enic) |
| { |
| int err; |
| |
| spin_lock_bh(&enic->devcmd_lock); |
| switch (vnic_dev_get_intr_mode(enic->vdev)) { |
| case VNIC_DEV_INTR_MODE_INTX: |
| err = vnic_dev_notify_set(enic->vdev, |
| enic_legacy_notify_intr()); |
| break; |
| case VNIC_DEV_INTR_MODE_MSIX: |
| err = vnic_dev_notify_set(enic->vdev, |
| enic_msix_notify_intr(enic)); |
| break; |
| default: |
| err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */); |
| break; |
| } |
| spin_unlock_bh(&enic->devcmd_lock); |
| |
| return err; |
| } |
| |
| static void enic_notify_timer_start(struct enic *enic) |
| { |
| switch (vnic_dev_get_intr_mode(enic->vdev)) { |
| case VNIC_DEV_INTR_MODE_MSI: |
| mod_timer(&enic->notify_timer, jiffies); |
| break; |
| default: |
| /* Using intr for notification for INTx/MSI-X */ |
| break; |
| } |
| } |
| |
| /* rtnl lock is held, process context */ |
| static int enic_open(struct net_device *netdev) |
| { |
| struct enic *enic = netdev_priv(netdev); |
| unsigned int i; |
| int err; |
| |
| err = enic_request_intr(enic); |
| if (err) { |
| netdev_err(netdev, "Unable to request irq.\n"); |
| return err; |
| } |
| enic_init_affinity_hint(enic); |
| enic_set_affinity_hint(enic); |
| |
| err = enic_dev_notify_set(enic); |
| if (err) { |
| netdev_err(netdev, |
| "Failed to alloc notify buffer, aborting.\n"); |
| goto err_out_free_intr; |
| } |
| |
| for (i = 0; i < enic->rq_count; i++) { |
| vnic_rq_fill(&enic->rq[i], enic_rq_alloc_buf); |
| /* Need at least one buffer on ring to get going */ |
| if (vnic_rq_desc_used(&enic->rq[i]) == 0) { |
| netdev_err(netdev, "Unable to alloc receive buffers\n"); |
| err = -ENOMEM; |
| goto err_out_free_rq; |
| } |
| } |
| |
| for (i = 0; i < enic->wq_count; i++) |
| vnic_wq_enable(&enic->wq[i]); |
| for (i = 0; i < enic->rq_count; i++) |
| vnic_rq_enable(&enic->rq[i]); |
| |
| if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic)) |
| enic_dev_add_station_addr(enic); |
| |
| enic_set_rx_mode(netdev); |
| |
| netif_tx_wake_all_queues(netdev); |
| |
| for (i = 0; i < enic->rq_count; i++) { |
| enic_busy_poll_init_lock(&enic->rq[i]); |
| napi_enable(&enic->napi[i]); |
| } |
| if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX) |
| for (i = 0; i < enic->wq_count; i++) |
| napi_enable(&enic->napi[enic_cq_wq(enic, i)]); |
| enic_dev_enable(enic); |
| |
| for (i = 0; i < enic->intr_count; i++) |
| vnic_intr_unmask(&enic->intr[i]); |
| |
| enic_notify_timer_start(enic); |
| enic_rfs_flw_tbl_init(enic); |
| |
| return 0; |
| |
| err_out_free_rq: |
| for (i = 0; i < enic->rq_count; i++) |
| vnic_rq_clean(&enic->rq[i], enic_free_rq_buf); |
| enic_dev_notify_unset(enic); |
| err_out_free_intr: |
| enic_unset_affinity_hint(enic); |
| enic_free_intr(enic); |
| |
| return err; |
| } |
| |
| /* rtnl lock is held, process context */ |
| static int enic_stop(struct net_device *netdev) |
| { |
| struct enic *enic = netdev_priv(netdev); |
| unsigned int i; |
| int err; |
| |
| for (i = 0; i < enic->intr_count; i++) { |
| vnic_intr_mask(&enic->intr[i]); |
| (void)vnic_intr_masked(&enic->intr[i]); /* flush write */ |
| } |
| |
| enic_synchronize_irqs(enic); |
| |
| del_timer_sync(&enic->notify_timer); |
| enic_rfs_flw_tbl_free(enic); |
| |
| enic_dev_disable(enic); |
| |
| for (i = 0; i < enic->rq_count; i++) { |
| napi_disable(&enic->napi[i]); |
| local_bh_disable(); |
| while (!enic_poll_lock_napi(&enic->rq[i])) |
| mdelay(1); |
| local_bh_enable(); |
| } |
| |
| netif_carrier_off(netdev); |
| netif_tx_disable(netdev); |
| if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX) |
| for (i = 0; i < enic->wq_count; i++) |
| napi_disable(&enic->napi[enic_cq_wq(enic, i)]); |
| |
| if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic)) |
| enic_dev_del_station_addr(enic); |
| |
| for (i = 0; i < enic->wq_count; i++) { |
| err = vnic_wq_disable(&enic->wq[i]); |
| if (err) |
| return err; |
| } |
| for (i = 0; i < enic->rq_count; i++) { |
| err = vnic_rq_disable(&enic->rq[i]); |
| if (err) |
| return err; |
| } |
| |
| enic_dev_notify_unset(enic); |
| enic_unset_affinity_hint(enic); |
| enic_free_intr(enic); |
| |
| for (i = 0; i < enic->wq_count; i++) |
| vnic_wq_clean(&enic->wq[i], enic_free_wq_buf); |
| for (i = 0; i < enic->rq_count; i++) |
| vnic_rq_clean(&enic->rq[i], enic_free_rq_buf); |
| for (i = 0; i < enic->cq_count; i++) |
| vnic_cq_clean(&enic->cq[i]); |
| for (i = 0; i < enic->intr_count; i++) |
| vnic_intr_clean(&enic->intr[i]); |
| |
| return 0; |
| } |
| |
| static int enic_change_mtu(struct net_device *netdev, int new_mtu) |
| { |
| struct enic *enic = netdev_priv(netdev); |
| int running = netif_running(netdev); |
| |
| if (new_mtu < ENIC_MIN_MTU || new_mtu > ENIC_MAX_MTU) |
| return -EINVAL; |
| |
| if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) |
| return -EOPNOTSUPP; |
| |
| if (running) |
| enic_stop(netdev); |
| |
| netdev->mtu = new_mtu; |
| |
| if (netdev->mtu > enic->port_mtu) |
| netdev_warn(netdev, |
| "interface MTU (%d) set higher than port MTU (%d)\n", |
| netdev->mtu, enic->port_mtu); |
| |
| if (running) |
| enic_open(netdev); |
| |
| return 0; |
| } |
| |
| static void enic_change_mtu_work(struct work_struct *work) |
| { |
| struct enic *enic = container_of(work, struct enic, change_mtu_work); |
| struct net_device *netdev = enic->netdev; |
| int new_mtu = vnic_dev_mtu(enic->vdev); |
| int err; |
| unsigned int i; |
| |
| new_mtu = max_t(int, ENIC_MIN_MTU, min_t(int, ENIC_MAX_MTU, new_mtu)); |
| |
| rtnl_lock(); |
| |
| /* Stop RQ */ |
| del_timer_sync(&enic->notify_timer); |
| |
| for (i = 0; i < enic->rq_count; i++) |
| napi_disable(&enic->napi[i]); |
| |
| vnic_intr_mask(&enic->intr[0]); |
| enic_synchronize_irqs(enic); |
| err = vnic_rq_disable(&enic->rq[0]); |
| if (err) { |
| rtnl_unlock(); |
| netdev_err(netdev, "Unable to disable RQ.\n"); |
| return; |
| } |
| vnic_rq_clean(&enic->rq[0], enic_free_rq_buf); |
| vnic_cq_clean(&enic->cq[0]); |
| vnic_intr_clean(&enic->intr[0]); |
| |
| /* Fill RQ with new_mtu-sized buffers */ |
| netdev->mtu = new_mtu; |
| vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf); |
| /* Need at least one buffer on ring to get going */ |
| if (vnic_rq_desc_used(&enic->rq[0]) == 0) { |
| rtnl_unlock(); |
| netdev_err(netdev, "Unable to alloc receive buffers.\n"); |
| return; |
| } |
| |
| /* Start RQ */ |
| vnic_rq_enable(&enic->rq[0]); |
| napi_enable(&enic->napi[0]); |
| vnic_intr_unmask(&enic->intr[0]); |
| enic_notify_timer_start(enic); |
| |
| rtnl_unlock(); |
| |
| netdev_info(netdev, "interface MTU set as %d\n", netdev->mtu); |
| } |
| |
| #ifdef CONFIG_NET_POLL_CONTROLLER |
| static void enic_poll_controller(struct net_device *netdev) |
| { |
| struct enic *enic = netdev_priv(netdev); |
| struct vnic_dev *vdev = enic->vdev; |
| unsigned int i, intr; |
| |
| switch (vnic_dev_get_intr_mode(vdev)) { |
| case VNIC_DEV_INTR_MODE_MSIX: |
| for (i = 0; i < enic->rq_count; i++) { |
| intr = enic_msix_rq_intr(enic, i); |
| enic_isr_msix(enic->msix_entry[intr].vector, |
| &enic->napi[i]); |
| } |
| |
| for (i = 0; i < enic->wq_count; i++) { |
| intr = enic_msix_wq_intr(enic, i); |
| enic_isr_msix(enic->msix_entry[intr].vector, |
| &enic->napi[enic_cq_wq(enic, i)]); |
| } |
| |
| break; |
| case VNIC_DEV_INTR_MODE_MSI: |
| enic_isr_msi(enic->pdev->irq, enic); |
| break; |
| case VNIC_DEV_INTR_MODE_INTX: |
| enic_isr_legacy(enic->pdev->irq, netdev); |
| break; |
| default: |
| break; |
| } |
| } |
| #endif |
| |
| static int enic_dev_wait(struct vnic_dev *vdev, |
| int (*start)(struct vnic_dev *, int), |
| int (*finished)(struct vnic_dev *, int *), |
| int arg) |
| { |
| unsigned long time; |
| int done; |
| int err; |
| |
| BUG_ON(in_interrupt()); |
| |
| err = start(vdev, arg); |
| if (err) |
| return err; |
| |
| /* Wait for func to complete...2 seconds max |
| */ |
| |
| time = jiffies + (HZ * 2); |
| do { |
| |
| err = finished(vdev, &done); |
| if (err) |
| return err; |
| |
| if (done) |
| return 0; |
| |
| schedule_timeout_uninterruptible(HZ / 10); |
| |
| } while (time_after(time, jiffies)); |
| |
| return -ETIMEDOUT; |
| } |
| |
| static int enic_dev_open(struct enic *enic) |
| { |
| int err; |
| |
| err = enic_dev_wait(enic->vdev, vnic_dev_open, |
| vnic_dev_open_done, 0); |
| if (err) |
| dev_err(enic_get_dev(enic), "vNIC device open failed, err %d\n", |
| err); |
| |
| return err; |
| } |
| |
| static int enic_dev_soft_reset(struct enic *enic) |
| { |
| int err; |
| |
| err = enic_dev_wait(enic->vdev, vnic_dev_soft_reset, |
| vnic_dev_soft_reset_done, 0); |
| if (err) |
| netdev_err(enic->netdev, "vNIC soft reset failed, err %d\n", |
| err); |
| |
| return err; |
| } |
| |
| static int enic_dev_hang_reset(struct enic *enic) |
| { |
| int err; |
| |
| err = enic_dev_wait(enic->vdev, vnic_dev_hang_reset, |
| vnic_dev_hang_reset_done, 0); |
| if (err) |
| netdev_err(enic->netdev, "vNIC hang reset failed, err %d\n", |
| err); |
| |
| return err; |
| } |
| |
| int __enic_set_rsskey(struct enic *enic) |
| { |
| union vnic_rss_key *rss_key_buf_va; |
| dma_addr_t rss_key_buf_pa; |
| int i, kidx, bidx, err; |
| |
| rss_key_buf_va = pci_zalloc_consistent(enic->pdev, |
| sizeof(union vnic_rss_key), |
| &rss_key_buf_pa); |
| if (!rss_key_buf_va) |
| return -ENOMEM; |
| |
| for (i = 0; i < ENIC_RSS_LEN; i++) { |
| kidx = i / ENIC_RSS_BYTES_PER_KEY; |
| bidx = i % ENIC_RSS_BYTES_PER_KEY; |
| rss_key_buf_va->key[kidx].b[bidx] = enic->rss_key[i]; |
| } |
| spin_lock_bh(&enic->devcmd_lock); |
| err = enic_set_rss_key(enic, |
| rss_key_buf_pa, |
| sizeof(union vnic_rss_key)); |
| spin_unlock_bh(&enic->devcmd_lock); |
| |
| pci_free_consistent(enic->pdev, sizeof(union vnic_rss_key), |
| rss_key_buf_va, rss_key_buf_pa); |
| |
| return err; |
| } |
| |
| static int enic_set_rsskey(struct enic *enic) |
| { |
| netdev_rss_key_fill(enic->rss_key, ENIC_RSS_LEN); |
| |
| return __enic_set_rsskey(enic); |
| } |
| |
| static int enic_set_rsscpu(struct enic *enic, u8 rss_hash_bits) |
| { |
| dma_addr_t rss_cpu_buf_pa; |
| union vnic_rss_cpu *rss_cpu_buf_va = NULL; |
| unsigned int i; |
| int err; |
| |
| rss_cpu_buf_va = pci_alloc_consistent(enic->pdev, |
| sizeof(union vnic_rss_cpu), &rss_cpu_buf_pa); |
| if (!rss_cpu_buf_va) |
| return -ENOMEM; |
| |
| for (i = 0; i < (1 << rss_hash_bits); i++) |
| (*rss_cpu_buf_va).cpu[i/4].b[i%4] = i % enic->rq_count; |
| |
| spin_lock_bh(&enic->devcmd_lock); |
| err = enic_set_rss_cpu(enic, |
| rss_cpu_buf_pa, |
| sizeof(union vnic_rss_cpu)); |
| spin_unlock_bh(&enic->devcmd_lock); |
| |
| pci_free_consistent(enic->pdev, sizeof(union vnic_rss_cpu), |
| rss_cpu_buf_va, rss_cpu_buf_pa); |
| |
| return err; |
| } |
| |
| static int enic_set_niccfg(struct enic *enic, u8 rss_default_cpu, |
| u8 rss_hash_type, u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable) |
| { |
| const u8 tso_ipid_split_en = 0; |
| const u8 ig_vlan_strip_en = 1; |
| int err; |
| |
| /* Enable VLAN tag stripping. |
| */ |
| |
| spin_lock_bh(&enic->devcmd_lock); |
| err = enic_set_nic_cfg(enic, |
| rss_default_cpu, rss_hash_type, |
| rss_hash_bits, rss_base_cpu, |
| rss_enable, tso_ipid_split_en, |
| ig_vlan_strip_en); |
| spin_unlock_bh(&enic->devcmd_lock); |
| |
| return err; |
| } |
| |
| static int enic_set_rss_nic_cfg(struct enic *enic) |
| { |
| struct device *dev = enic_get_dev(enic); |
| const u8 rss_default_cpu = 0; |
| const u8 rss_hash_type = NIC_CFG_RSS_HASH_TYPE_IPV4 | |
| NIC_CFG_RSS_HASH_TYPE_TCP_IPV4 | |
| NIC_CFG_RSS_HASH_TYPE_IPV6 | |
| NIC_CFG_RSS_HASH_TYPE_TCP_IPV6; |
| const u8 rss_hash_bits = 7; |
| const u8 rss_base_cpu = 0; |
| u8 rss_enable = ENIC_SETTING(enic, RSS) && (enic->rq_count > 1); |
| |
| if (rss_enable) { |
| if (!enic_set_rsskey(enic)) { |
| if (enic_set_rsscpu(enic, rss_hash_bits)) { |
| rss_enable = 0; |
| dev_warn(dev, "RSS disabled, " |
| "Failed to set RSS cpu indirection table."); |
| } |
| } else { |
| rss_enable = 0; |
| dev_warn(dev, "RSS disabled, Failed to set RSS key.\n"); |
| } |
| } |
| |
| return enic_set_niccfg(enic, rss_default_cpu, rss_hash_type, |
| rss_hash_bits, rss_base_cpu, rss_enable); |
| } |
| |
| static void enic_reset(struct work_struct *work) |
| { |
| struct enic *enic = container_of(work, struct enic, reset); |
| |
| if (!netif_running(enic->netdev)) |
| return; |
| |
| rtnl_lock(); |
| |
| spin_lock(&enic->enic_api_lock); |
| enic_stop(enic->netdev); |
| enic_dev_soft_reset(enic); |
| enic_reset_addr_lists(enic); |
| enic_init_vnic_resources(enic); |
| enic_set_rss_nic_cfg(enic); |
| enic_dev_set_ig_vlan_rewrite_mode(enic); |
| enic_open(enic->netdev); |
| spin_unlock(&enic->enic_api_lock); |
| call_netdevice_notifiers(NETDEV_REBOOT, enic->netdev); |
| |
| rtnl_unlock(); |
| } |
| |
| static void enic_tx_hang_reset(struct work_struct *work) |
| { |
| struct enic *enic = container_of(work, struct enic, tx_hang_reset); |
| |
| rtnl_lock(); |
| |
| spin_lock(&enic->enic_api_lock); |
| enic_dev_hang_notify(enic); |
| enic_stop(enic->netdev); |
| enic_dev_hang_reset(enic); |
| enic_reset_addr_lists(enic); |
| enic_init_vnic_resources(enic); |
| enic_set_rss_nic_cfg(enic); |
| enic_dev_set_ig_vlan_rewrite_mode(enic); |
| enic_open(enic->netdev); |
| spin_unlock(&enic->enic_api_lock); |
| call_netdevice_notifiers(NETDEV_REBOOT, enic->netdev); |
| |
| rtnl_unlock(); |
| } |
| |
| static int enic_set_intr_mode(struct enic *enic) |
| { |
| unsigned int n = min_t(unsigned int, enic->rq_count, ENIC_RQ_MAX); |
| unsigned int m = min_t(unsigned int, enic->wq_count, ENIC_WQ_MAX); |
| unsigned int i; |
| |
| /* Set interrupt mode (INTx, MSI, MSI-X) depending |
| * on system capabilities. |
| * |
| * Try MSI-X first |
| * |
| * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs |
| * (the second to last INTR is used for WQ/RQ errors) |
| * (the last INTR is used for notifications) |
| */ |
| |
| BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2); |
| for (i = 0; i < n + m + 2; i++) |
| enic->msix_entry[i].entry = i; |
| |
| /* Use multiple RQs if RSS is enabled |
| */ |
| |
| if (ENIC_SETTING(enic, RSS) && |
| enic->config.intr_mode < 1 && |
| enic->rq_count >= n && |
| enic->wq_count >= m && |
| enic->cq_count >= n + m && |
| enic->intr_count >= n + m + 2) { |
| |
| if (pci_enable_msix_range(enic->pdev, enic->msix_entry, |
| n + m + 2, n + m + 2) > 0) { |
| |
| enic->rq_count = n; |
| enic->wq_count = m; |
| enic->cq_count = n + m; |
| enic->intr_count = n + m + 2; |
| |
| vnic_dev_set_intr_mode(enic->vdev, |
| VNIC_DEV_INTR_MODE_MSIX); |
| |
| return 0; |
| } |
| } |
| |
| if (enic->config.intr_mode < 1 && |
| enic->rq_count >= 1 && |
| enic->wq_count >= m && |
| enic->cq_count >= 1 + m && |
| enic->intr_count >= 1 + m + 2) { |
| if (pci_enable_msix_range(enic->pdev, enic->msix_entry, |
| 1 + m + 2, 1 + m + 2) > 0) { |
| |
| enic->rq_count = 1; |
| enic->wq_count = m; |
| enic->cq_count = 1 + m; |
| enic->intr_count = 1 + m + 2; |
| |
| vnic_dev_set_intr_mode(enic->vdev, |
| VNIC_DEV_INTR_MODE_MSIX); |
| |
| return 0; |
| } |
| } |
| |
| /* Next try MSI |
| * |
| * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR |
| */ |
| |
| if (enic->config.intr_mode < 2 && |
| enic->rq_count >= 1 && |
| enic->wq_count >= 1 && |
| enic->cq_count >= 2 && |
| enic->intr_count >= 1 && |
| !pci_enable_msi(enic->pdev)) { |
| |
| enic->rq_count = 1; |
| enic->wq_count = 1; |
| enic->cq_count = 2; |
| enic->intr_count = 1; |
| |
| vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI); |
| |
| return 0; |
| } |
| |
| /* Next try INTx |
| * |
| * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs |
| * (the first INTR is used for WQ/RQ) |
| * (the second INTR is used for WQ/RQ errors) |
| * (the last INTR is used for notifications) |
| */ |
| |
| if (enic->config.intr_mode < 3 && |
| enic->rq_count >= 1 && |
| enic->wq_count >= 1 && |
| enic->cq_count >= 2 && |
| enic->intr_count >= 3) { |
| |
| enic->rq_count = 1; |
| enic->wq_count = 1; |
| enic->cq_count = 2; |
| enic->intr_count = 3; |
| |
| vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX); |
| |
| return 0; |
| } |
| |
| vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN); |
| |
| return -EINVAL; |
| } |
| |
| static void enic_clear_intr_mode(struct enic *enic) |
| { |
| switch (vnic_dev_get_intr_mode(enic->vdev)) { |
| case VNIC_DEV_INTR_MODE_MSIX: |
| pci_disable_msix(enic->pdev); |
| break; |
| case VNIC_DEV_INTR_MODE_MSI: |
| pci_disable_msi(enic->pdev); |
| break; |
| default: |
| break; |
| } |
| |
| vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN); |
| } |
| |
| static const struct net_device_ops enic_netdev_dynamic_ops = { |
| .ndo_open = enic_open, |
| .ndo_stop = enic_stop, |
| .ndo_start_xmit = enic_hard_start_xmit, |
| .ndo_get_stats64 = enic_get_stats, |
| .ndo_validate_addr = eth_validate_addr, |
| .ndo_set_rx_mode = enic_set_rx_mode, |
| .ndo_set_mac_address = enic_set_mac_address_dynamic, |
| .ndo_change_mtu = enic_change_mtu, |
| .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid, |
| .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid, |
| .ndo_tx_timeout = enic_tx_timeout, |
| .ndo_set_vf_port = enic_set_vf_port, |
| .ndo_get_vf_port = enic_get_vf_port, |
| .ndo_set_vf_mac = enic_set_vf_mac, |
| #ifdef CONFIG_NET_POLL_CONTROLLER |
| .ndo_poll_controller = enic_poll_controller, |
| #endif |
| #ifdef CONFIG_RFS_ACCEL |
| .ndo_rx_flow_steer = enic_rx_flow_steer, |
| #endif |
| #ifdef CONFIG_NET_RX_BUSY_POLL |
| .ndo_busy_poll = enic_busy_poll, |
| #endif |
| }; |
| |
| static const struct net_device_ops enic_netdev_ops = { |
| .ndo_open = enic_open, |
| .ndo_stop = enic_stop, |
| .ndo_start_xmit = enic_hard_start_xmit, |
| .ndo_get_stats64 = enic_get_stats, |
| .ndo_validate_addr = eth_validate_addr, |
| .ndo_set_mac_address = enic_set_mac_address, |
| .ndo_set_rx_mode = enic_set_rx_mode, |
| .ndo_change_mtu = enic_change_mtu, |
| .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid, |
| .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid, |
| .ndo_tx_timeout = enic_tx_timeout, |
| .ndo_set_vf_port = enic_set_vf_port, |
| .ndo_get_vf_port = enic_get_vf_port, |
| .ndo_set_vf_mac = enic_set_vf_mac, |
| #ifdef CONFIG_NET_POLL_CONTROLLER |
| .ndo_poll_controller = enic_poll_controller, |
| #endif |
| #ifdef CONFIG_RFS_ACCEL |
| .ndo_rx_flow_steer = enic_rx_flow_steer, |
| #endif |
| #ifdef CONFIG_NET_RX_BUSY_POLL |
| .ndo_busy_poll = enic_busy_poll, |
| #endif |
| }; |
| |
| static void enic_dev_deinit(struct enic *enic) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < enic->rq_count; i++) { |
| napi_hash_del(&enic->napi[i]); |
| netif_napi_del(&enic->napi[i]); |
| } |
| if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX) |
| for (i = 0; i < enic->wq_count; i++) |
| netif_napi_del(&enic->napi[enic_cq_wq(enic, i)]); |
| |
| enic_free_vnic_resources(enic); |
| enic_clear_intr_mode(enic); |
| enic_free_affinity_hint(enic); |
| } |
| |
| static void enic_kdump_kernel_config(struct enic *enic) |
| { |
| if (is_kdump_kernel()) { |
| dev_info(enic_get_dev(enic), "Running from within kdump kernel. Using minimal resources\n"); |
| enic->rq_count = 1; |
| enic->wq_count = 1; |
| enic->config.rq_desc_count = ENIC_MIN_RQ_DESCS; |
| enic->config.wq_desc_count = ENIC_MIN_WQ_DESCS; |
| enic->config.mtu = min_t(u16, 1500, enic->config.mtu); |
| } |
| } |
| |
| static int enic_dev_init(struct enic *enic) |
| { |
| struct device *dev = enic_get_dev(enic); |
| struct net_device *netdev = enic->netdev; |
| unsigned int i; |
| int err; |
| |
| /* Get interrupt coalesce timer info */ |
| err = enic_dev_intr_coal_timer_info(enic); |
| if (err) { |
| dev_warn(dev, "Using default conversion factor for " |
| "interrupt coalesce timer\n"); |
| vnic_dev_intr_coal_timer_info_default(enic->vdev); |
| } |
| |
| /* Get vNIC configuration |
| */ |
| |
| err = enic_get_vnic_config(enic); |
| if (err) { |
| dev_err(dev, "Get vNIC configuration failed, aborting\n"); |
| return err; |
| } |
| |
| /* Get available resource counts |
| */ |
| |
| enic_get_res_counts(enic); |
| |
| /* modify resource count if we are in kdump_kernel |
| */ |
| enic_kdump_kernel_config(enic); |
| |
| /* Set interrupt mode based on resource counts and system |
| * capabilities |
| */ |
| |
| err = enic_set_intr_mode(enic); |
| if (err) { |
| dev_err(dev, "Failed to set intr mode based on resource " |
| "counts and system capabilities, aborting\n"); |
| return err; |
| } |
| |
| /* Allocate and configure vNIC resources |
| */ |
| |
| err = enic_alloc_vnic_resources(enic); |
| if (err) { |
| dev_err(dev, "Failed to alloc vNIC resources, aborting\n"); |
| goto err_out_free_vnic_resources; |
| } |
| |
| enic_init_vnic_resources(enic); |
| |
| err = enic_set_rss_nic_cfg(enic); |
| if (err) { |
| dev_err(dev, "Failed to config nic, aborting\n"); |
| goto err_out_free_vnic_resources; |
| } |
| |
| switch (vnic_dev_get_intr_mode(enic->vdev)) { |
| default: |
| netif_napi_add(netdev, &enic->napi[0], enic_poll, 64); |
| break; |
| case VNIC_DEV_INTR_MODE_MSIX: |
| for (i = 0; i < enic->rq_count; i++) { |
| netif_napi_add(netdev, &enic->napi[i], |
| enic_poll_msix_rq, NAPI_POLL_WEIGHT); |
| } |
| for (i = 0; i < enic->wq_count; i++) |
| netif_napi_add(netdev, &enic->napi[enic_cq_wq(enic, i)], |
| enic_poll_msix_wq, NAPI_POLL_WEIGHT); |
| break; |
| } |
| |
| return 0; |
| |
| err_out_free_vnic_resources: |
| enic_free_affinity_hint(enic); |
| enic_clear_intr_mode(enic); |
| enic_free_vnic_resources(enic); |
| |
| return err; |
| } |
| |
| static void enic_iounmap(struct enic *enic) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < ARRAY_SIZE(enic->bar); i++) |
| if (enic->bar[i].vaddr) |
| iounmap(enic->bar[i].vaddr); |
| } |
| |
| static int enic_probe(struct pci_dev *pdev, const struct pci_device_id *ent) |
| { |
| struct device *dev = &pdev->dev; |
| struct net_device *netdev; |
| struct enic *enic; |
| int using_dac = 0; |
| unsigned int i; |
| int err; |
| #ifdef CONFIG_PCI_IOV |
| int pos = 0; |
| #endif |
| int num_pps = 1; |
| |
| /* Allocate net device structure and initialize. Private |
| * instance data is initialized to zero. |
| */ |
| |
| netdev = alloc_etherdev_mqs(sizeof(struct enic), |
| ENIC_RQ_MAX, ENIC_WQ_MAX); |
| if (!netdev) |
| return -ENOMEM; |
| |
| pci_set_drvdata(pdev, netdev); |
| |
| SET_NETDEV_DEV(netdev, &pdev->dev); |
| |
| enic = netdev_priv(netdev); |
| enic->netdev = netdev; |
| enic->pdev = pdev; |
| |
| /* Setup PCI resources |
| */ |
| |
| err = pci_enable_device_mem(pdev); |
| if (err) { |
| dev_err(dev, "Cannot enable PCI device, aborting\n"); |
| goto err_out_free_netdev; |
| } |
| |
| err = pci_request_regions(pdev, DRV_NAME); |
| if (err) { |
| dev_err(dev, "Cannot request PCI regions, aborting\n"); |
| goto err_out_disable_device; |
| } |
| |
| pci_set_master(pdev); |
| |
| /* Query PCI controller on system for DMA addressing |
| * limitation for the device. Try 64-bit first, and |
| * fail to 32-bit. |
| */ |
| |
| err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64)); |
| if (err) { |
| err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); |
| if (err) { |
| dev_err(dev, "No usable DMA configuration, aborting\n"); |
| goto err_out_release_regions; |
| } |
| err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); |
| if (err) { |
| dev_err(dev, "Unable to obtain %u-bit DMA " |
| "for consistent allocations, aborting\n", 32); |
| goto err_out_release_regions; |
| } |
| } else { |
| err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); |
| if (err) { |
| dev_err(dev, "Unable to obtain %u-bit DMA " |
| "for consistent allocations, aborting\n", 64); |
| goto err_out_release_regions; |
| } |
| using_dac = 1; |
| } |
| |
| /* Map vNIC resources from BAR0-5 |
| */ |
| |
| for (i = 0; i < ARRAY_SIZE(enic->bar); i++) { |
| if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM)) |
| continue; |
| enic->bar[i].len = pci_resource_len(pdev, i); |
| enic->bar[i].vaddr = pci_iomap(pdev, i, enic->bar[i].len); |
| if (!enic->bar[i].vaddr) { |
| dev_err(dev, "Cannot memory-map BAR %d, aborting\n", i); |
| err = -ENODEV; |
| goto err_out_iounmap; |
| } |
| enic->bar[i].bus_addr = pci_resource_start(pdev, i); |
| } |
| |
| /* Register vNIC device |
| */ |
| |
| enic->vdev = vnic_dev_register(NULL, enic, pdev, enic->bar, |
| ARRAY_SIZE(enic->bar)); |
| if (!enic->vdev) { |
| dev_err(dev, "vNIC registration failed, aborting\n"); |
| err = -ENODEV; |
| goto err_out_iounmap; |
| } |
| |
| err = vnic_devcmd_init(enic->vdev); |
| |
| if (err) |
| goto err_out_vnic_unregister; |
| |
| #ifdef CONFIG_PCI_IOV |
| /* Get number of subvnics */ |
| pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_SRIOV); |
| if (pos) { |
| pci_read_config_word(pdev, pos + PCI_SRIOV_TOTAL_VF, |
| &enic->num_vfs); |
| if (enic->num_vfs) { |
| err = pci_enable_sriov(pdev, enic->num_vfs); |
| if (err) { |
| dev_err(dev, "SRIOV enable failed, aborting." |
| " pci_enable_sriov() returned %d\n", |
| err); |
| goto err_out_vnic_unregister; |
| } |
| enic->priv_flags |= ENIC_SRIOV_ENABLED; |
| num_pps = enic->num_vfs; |
| } |
| } |
| #endif |
| |
| /* Allocate structure for port profiles */ |
| enic->pp = kcalloc(num_pps, sizeof(*enic->pp), GFP_KERNEL); |
| if (!enic->pp) { |
| err = -ENOMEM; |
| goto err_out_disable_sriov_pp; |
| } |
| |
| /* Issue device open to get device in known state |
| */ |
| |
| err = enic_dev_open(enic); |
| if (err) { |
| dev_err(dev, "vNIC dev open failed, aborting\n"); |
| goto err_out_disable_sriov; |
| } |
| |
| /* Setup devcmd lock |
| */ |
| |
| spin_lock_init(&enic->devcmd_lock); |
| spin_lock_init(&enic->enic_api_lock); |
| |
| /* |
| * Set ingress vlan rewrite mode before vnic initialization |
| */ |
| |
| err = enic_dev_set_ig_vlan_rewrite_mode(enic); |
| if (err) { |
| dev_err(dev, |
| "Failed to set ingress vlan rewrite mode, aborting.\n"); |
| goto err_out_dev_close; |
| } |
| |
| /* Issue device init to initialize the vnic-to-switch link. |
| * We'll start with carrier off and wait for link UP |
| * notification later to turn on carrier. We don't need |
| * to wait here for the vnic-to-switch link initialization |
| * to complete; link UP notification is the indication that |
| * the process is complete. |
| */ |
| |
| netif_carrier_off(netdev); |
| |
| /* Do not call dev_init for a dynamic vnic. |
| * For a dynamic vnic, init_prov_info will be |
| * called later by an upper layer. |
| */ |
| |
| if (!enic_is_dynamic(enic)) { |
| err = vnic_dev_init(enic->vdev, 0); |
| if (err) { |
| dev_err(dev, "vNIC dev init failed, aborting\n"); |
| goto err_out_dev_close; |
| } |
| } |
| |
| err = enic_dev_init(enic); |
| if (err) { |
| dev_err(dev, "Device initialization failed, aborting\n"); |
| goto err_out_dev_close; |
| } |
| |
| netif_set_real_num_tx_queues(netdev, enic->wq_count); |
| netif_set_real_num_rx_queues(netdev, enic->rq_count); |
| |
| /* Setup notification timer, HW reset task, and wq locks |
| */ |
| |
| init_timer(&enic->notify_timer); |
| enic->notify_timer.function = enic_notify_timer; |
| enic->notify_timer.data = (unsigned long)enic; |
| |
| enic_set_rx_coal_setting(enic); |
| INIT_WORK(&enic->reset, enic_reset); |
| INIT_WORK(&enic->tx_hang_reset, enic_tx_hang_reset); |
| INIT_WORK(&enic->change_mtu_work, enic_change_mtu_work); |
| |
| for (i = 0; i < enic->wq_count; i++) |
| spin_lock_init(&enic->wq_lock[i]); |
| |
| /* Register net device |
| */ |
| |
| enic->port_mtu = enic->config.mtu; |
| (void)enic_change_mtu(netdev, enic->port_mtu); |
| |
| err = enic_set_mac_addr(netdev, enic->mac_addr); |
| if (err) { |
| dev_err(dev, "Invalid MAC address, aborting\n"); |
| goto err_out_dev_deinit; |
| } |
| |
| enic->tx_coalesce_usecs = enic->config.intr_timer_usec; |
| /* rx coalesce time already got initialized. This gets used |
| * if adaptive coal is turned off |
| */ |
| enic->rx_coalesce_usecs = enic->tx_coalesce_usecs; |
| |
| if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) |
| netdev->netdev_ops = &enic_netdev_dynamic_ops; |
| else |
| netdev->netdev_ops = &enic_netdev_ops; |
| |
| netdev->watchdog_timeo = 2 * HZ; |
| enic_set_ethtool_ops(netdev); |
| |
| netdev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX; |
| if (ENIC_SETTING(enic, LOOP)) { |
| netdev->features &= ~NETIF_F_HW_VLAN_CTAG_TX; |
| enic->loop_enable = 1; |
| enic->loop_tag = enic->config.loop_tag; |
| dev_info(dev, "loopback tag=0x%04x\n", enic->loop_tag); |
| } |
| if (ENIC_SETTING(enic, TXCSUM)) |
| netdev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM; |
| if (ENIC_SETTING(enic, TSO)) |
| netdev->hw_features |= NETIF_F_TSO | |
| NETIF_F_TSO6 | NETIF_F_TSO_ECN; |
| if (ENIC_SETTING(enic, RSS)) |
| netdev->hw_features |= NETIF_F_RXHASH; |
| if (ENIC_SETTING(enic, RXCSUM)) |
| netdev->hw_features |= NETIF_F_RXCSUM; |
| |
| netdev->features |= netdev->hw_features; |
| |
| #ifdef CONFIG_RFS_ACCEL |
| netdev->hw_features |= NETIF_F_NTUPLE; |
| #endif |
| |
| if (using_dac) |
| netdev->features |= NETIF_F_HIGHDMA; |
| |
| netdev->priv_flags |= IFF_UNICAST_FLT; |
| |
| err = register_netdev(netdev); |
| if (err) { |
| dev_err(dev, "Cannot register net device, aborting\n"); |
| goto err_out_dev_deinit; |
| } |
| enic->rx_copybreak = RX_COPYBREAK_DEFAULT; |
| |
| return 0; |
| |
| err_out_dev_deinit: |
| enic_dev_deinit(enic); |
| err_out_dev_close: |
| vnic_dev_close(enic->vdev); |
| err_out_disable_sriov: |
| kfree(enic->pp); |
| err_out_disable_sriov_pp: |
| #ifdef CONFIG_PCI_IOV |
| if (enic_sriov_enabled(enic)) { |
| pci_disable_sriov(pdev); |
| enic->priv_flags &= ~ENIC_SRIOV_ENABLED; |
| } |
| #endif |
| err_out_vnic_unregister: |
| vnic_dev_unregister(enic->vdev); |
| err_out_iounmap: |
| enic_iounmap(enic); |
| err_out_release_regions: |
| pci_release_regions(pdev); |
| err_out_disable_device: |
| pci_disable_device(pdev); |
| err_out_free_netdev: |
| free_netdev(netdev); |
| |
| return err; |
| } |
| |
| static void enic_remove(struct pci_dev *pdev) |
| { |
| struct net_device *netdev = pci_get_drvdata(pdev); |
| |
| if (netdev) { |
| struct enic *enic = netdev_priv(netdev); |
| |
| cancel_work_sync(&enic->reset); |
| cancel_work_sync(&enic->change_mtu_work); |
| unregister_netdev(netdev); |
| enic_dev_deinit(enic); |
| vnic_dev_close(enic->vdev); |
| #ifdef CONFIG_PCI_IOV |
| if (enic_sriov_enabled(enic)) { |
| pci_disable_sriov(pdev); |
| enic->priv_flags &= ~ENIC_SRIOV_ENABLED; |
| } |
| #endif |
| kfree(enic->pp); |
| vnic_dev_unregister(enic->vdev); |
| enic_iounmap(enic); |
| pci_release_regions(pdev); |
| pci_disable_device(pdev); |
| free_netdev(netdev); |
| } |
| } |
| |
| static struct pci_driver enic_driver = { |
| .name = DRV_NAME, |
| .id_table = enic_id_table, |
| .probe = enic_probe, |
| .remove = enic_remove, |
| }; |
| |
| static int __init enic_init_module(void) |
| { |
| pr_info("%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION); |
| |
| return pci_register_driver(&enic_driver); |
| } |
| |
| static void __exit enic_cleanup_module(void) |
| { |
| pci_unregister_driver(&enic_driver); |
| } |
| |
| module_init(enic_init_module); |
| module_exit(enic_cleanup_module); |