diff options
| author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2015-08-05 17:04:01 -0300 |
|---|---|---|
| committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2015-08-05 17:04:01 -0300 |
| commit | 57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch) | |
| tree | 5e910f0e82173f4ef4f51111366a3f1299037a7b /drivers/net/vmxnet3/vmxnet3_drv.c | |
Initial import
Diffstat (limited to 'drivers/net/vmxnet3/vmxnet3_drv.c')
| -rw-r--r-- | drivers/net/vmxnet3/vmxnet3_drv.c | 3391 |
1 files changed, 3391 insertions, 0 deletions
diff --git a/drivers/net/vmxnet3/vmxnet3_drv.c b/drivers/net/vmxnet3/vmxnet3_drv.c new file mode 100644 index 000000000..61c0840c4 --- /dev/null +++ b/drivers/net/vmxnet3/vmxnet3_drv.c @@ -0,0 +1,3391 @@ +/* + * Linux driver for VMware's vmxnet3 ethernet NIC. + * + * Copyright (C) 2008-2009, VMware, Inc. All Rights Reserved. + * + * This program is free software; you can 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 and no later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or + * NON INFRINGEMENT. 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". + * + * Maintained by: Shreyas Bhatewara <pv-drivers@vmware.com> + * + */ + +#include <linux/module.h> +#include <net/ip6_checksum.h> + +#include "vmxnet3_int.h" + +char vmxnet3_driver_name[] = "vmxnet3"; +#define VMXNET3_DRIVER_DESC "VMware vmxnet3 virtual NIC driver" + +/* + * PCI Device ID Table + * Last entry must be all 0s + */ +static const struct pci_device_id vmxnet3_pciid_table[] = { + {PCI_VDEVICE(VMWARE, PCI_DEVICE_ID_VMWARE_VMXNET3)}, + {0} +}; + +MODULE_DEVICE_TABLE(pci, vmxnet3_pciid_table); + +static int enable_mq = 1; + +static void +vmxnet3_write_mac_addr(struct vmxnet3_adapter *adapter, u8 *mac); + +/* + * Enable/Disable the given intr + */ +static void +vmxnet3_enable_intr(struct vmxnet3_adapter *adapter, unsigned intr_idx) +{ + VMXNET3_WRITE_BAR0_REG(adapter, VMXNET3_REG_IMR + intr_idx * 8, 0); +} + + +static void +vmxnet3_disable_intr(struct vmxnet3_adapter *adapter, unsigned intr_idx) +{ + VMXNET3_WRITE_BAR0_REG(adapter, VMXNET3_REG_IMR + intr_idx * 8, 1); +} + + +/* + * Enable/Disable all intrs used by the device + */ +static void +vmxnet3_enable_all_intrs(struct vmxnet3_adapter *adapter) +{ + int i; + + for (i = 0; i < adapter->intr.num_intrs; i++) + vmxnet3_enable_intr(adapter, i); + adapter->shared->devRead.intrConf.intrCtrl &= + cpu_to_le32(~VMXNET3_IC_DISABLE_ALL); +} + + +static void +vmxnet3_disable_all_intrs(struct vmxnet3_adapter *adapter) +{ + int i; + + adapter->shared->devRead.intrConf.intrCtrl |= + cpu_to_le32(VMXNET3_IC_DISABLE_ALL); + for (i = 0; i < adapter->intr.num_intrs; i++) + vmxnet3_disable_intr(adapter, i); +} + + +static void +vmxnet3_ack_events(struct vmxnet3_adapter *adapter, u32 events) +{ + VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_ECR, events); +} + + +static bool +vmxnet3_tq_stopped(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter) +{ + return tq->stopped; +} + + +static void +vmxnet3_tq_start(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter) +{ + tq->stopped = false; + netif_start_subqueue(adapter->netdev, tq - adapter->tx_queue); +} + + +static void +vmxnet3_tq_wake(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter) +{ + tq->stopped = false; + netif_wake_subqueue(adapter->netdev, (tq - adapter->tx_queue)); +} + + +static void +vmxnet3_tq_stop(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter) +{ + tq->stopped = true; + tq->num_stop++; + netif_stop_subqueue(adapter->netdev, (tq - adapter->tx_queue)); +} + + +/* + * Check the link state. This may start or stop the tx queue. + */ +static void +vmxnet3_check_link(struct vmxnet3_adapter *adapter, bool affectTxQueue) +{ + u32 ret; + int i; + unsigned long flags; + + spin_lock_irqsave(&adapter->cmd_lock, flags); + VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_GET_LINK); + ret = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD); + spin_unlock_irqrestore(&adapter->cmd_lock, flags); + + adapter->link_speed = ret >> 16; + if (ret & 1) { /* Link is up. */ + netdev_info(adapter->netdev, "NIC Link is Up %d Mbps\n", + adapter->link_speed); + netif_carrier_on(adapter->netdev); + + if (affectTxQueue) { + for (i = 0; i < adapter->num_tx_queues; i++) + vmxnet3_tq_start(&adapter->tx_queue[i], + adapter); + } + } else { + netdev_info(adapter->netdev, "NIC Link is Down\n"); + netif_carrier_off(adapter->netdev); + + if (affectTxQueue) { + for (i = 0; i < adapter->num_tx_queues; i++) + vmxnet3_tq_stop(&adapter->tx_queue[i], adapter); + } + } +} + +static void +vmxnet3_process_events(struct vmxnet3_adapter *adapter) +{ + int i; + unsigned long flags; + u32 events = le32_to_cpu(adapter->shared->ecr); + if (!events) + return; + + vmxnet3_ack_events(adapter, events); + + /* Check if link state has changed */ + if (events & VMXNET3_ECR_LINK) + vmxnet3_check_link(adapter, true); + + /* Check if there is an error on xmit/recv queues */ + if (events & (VMXNET3_ECR_TQERR | VMXNET3_ECR_RQERR)) { + spin_lock_irqsave(&adapter->cmd_lock, flags); + VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, + VMXNET3_CMD_GET_QUEUE_STATUS); + spin_unlock_irqrestore(&adapter->cmd_lock, flags); + + for (i = 0; i < adapter->num_tx_queues; i++) + if (adapter->tqd_start[i].status.stopped) + dev_err(&adapter->netdev->dev, + "%s: tq[%d] error 0x%x\n", + adapter->netdev->name, i, le32_to_cpu( + adapter->tqd_start[i].status.error)); + for (i = 0; i < adapter->num_rx_queues; i++) + if (adapter->rqd_start[i].status.stopped) + dev_err(&adapter->netdev->dev, + "%s: rq[%d] error 0x%x\n", + adapter->netdev->name, i, + adapter->rqd_start[i].status.error); + + schedule_work(&adapter->work); + } +} + +#ifdef __BIG_ENDIAN_BITFIELD +/* + * The device expects the bitfields in shared structures to be written in + * little endian. When CPU is big endian, the following routines are used to + * correctly read and write into ABI. + * The general technique used here is : double word bitfields are defined in + * opposite order for big endian architecture. Then before reading them in + * driver the complete double word is translated using le32_to_cpu. Similarly + * After the driver writes into bitfields, cpu_to_le32 is used to translate the + * double words into required format. + * In order to avoid touching bits in shared structure more than once, temporary + * descriptors are used. These are passed as srcDesc to following functions. + */ +static void vmxnet3_RxDescToCPU(const struct Vmxnet3_RxDesc *srcDesc, + struct Vmxnet3_RxDesc *dstDesc) +{ + u32 *src = (u32 *)srcDesc + 2; + u32 *dst = (u32 *)dstDesc + 2; + dstDesc->addr = le64_to_cpu(srcDesc->addr); + *dst = le32_to_cpu(*src); + dstDesc->ext1 = le32_to_cpu(srcDesc->ext1); +} + +static void vmxnet3_TxDescToLe(const struct Vmxnet3_TxDesc *srcDesc, + struct Vmxnet3_TxDesc *dstDesc) +{ + int i; + u32 *src = (u32 *)(srcDesc + 1); + u32 *dst = (u32 *)(dstDesc + 1); + + /* Working backwards so that the gen bit is set at the end. */ + for (i = 2; i > 0; i--) { + src--; + dst--; + *dst = cpu_to_le32(*src); + } +} + + +static void vmxnet3_RxCompToCPU(const struct Vmxnet3_RxCompDesc *srcDesc, + struct Vmxnet3_RxCompDesc *dstDesc) +{ + int i = 0; + u32 *src = (u32 *)srcDesc; + u32 *dst = (u32 *)dstDesc; + for (i = 0; i < sizeof(struct Vmxnet3_RxCompDesc) / sizeof(u32); i++) { + *dst = le32_to_cpu(*src); + src++; + dst++; + } +} + + +/* Used to read bitfield values from double words. */ +static u32 get_bitfield32(const __le32 *bitfield, u32 pos, u32 size) +{ + u32 temp = le32_to_cpu(*bitfield); + u32 mask = ((1 << size) - 1) << pos; + temp &= mask; + temp >>= pos; + return temp; +} + + + +#endif /* __BIG_ENDIAN_BITFIELD */ + +#ifdef __BIG_ENDIAN_BITFIELD + +# define VMXNET3_TXDESC_GET_GEN(txdesc) get_bitfield32(((const __le32 *) \ + txdesc) + VMXNET3_TXD_GEN_DWORD_SHIFT, \ + VMXNET3_TXD_GEN_SHIFT, VMXNET3_TXD_GEN_SIZE) +# define VMXNET3_TXDESC_GET_EOP(txdesc) get_bitfield32(((const __le32 *) \ + txdesc) + VMXNET3_TXD_EOP_DWORD_SHIFT, \ + VMXNET3_TXD_EOP_SHIFT, VMXNET3_TXD_EOP_SIZE) +# define VMXNET3_TCD_GET_GEN(tcd) get_bitfield32(((const __le32 *)tcd) + \ + VMXNET3_TCD_GEN_DWORD_SHIFT, VMXNET3_TCD_GEN_SHIFT, \ + VMXNET3_TCD_GEN_SIZE) +# define VMXNET3_TCD_GET_TXIDX(tcd) get_bitfield32((const __le32 *)tcd, \ + VMXNET3_TCD_TXIDX_SHIFT, VMXNET3_TCD_TXIDX_SIZE) +# define vmxnet3_getRxComp(dstrcd, rcd, tmp) do { \ + (dstrcd) = (tmp); \ + vmxnet3_RxCompToCPU((rcd), (tmp)); \ + } while (0) +# define vmxnet3_getRxDesc(dstrxd, rxd, tmp) do { \ + (dstrxd) = (tmp); \ + vmxnet3_RxDescToCPU((rxd), (tmp)); \ + } while (0) + +#else + +# define VMXNET3_TXDESC_GET_GEN(txdesc) ((txdesc)->gen) +# define VMXNET3_TXDESC_GET_EOP(txdesc) ((txdesc)->eop) +# define VMXNET3_TCD_GET_GEN(tcd) ((tcd)->gen) +# define VMXNET3_TCD_GET_TXIDX(tcd) ((tcd)->txdIdx) +# define vmxnet3_getRxComp(dstrcd, rcd, tmp) (dstrcd) = (rcd) +# define vmxnet3_getRxDesc(dstrxd, rxd, tmp) (dstrxd) = (rxd) + +#endif /* __BIG_ENDIAN_BITFIELD */ + + +static void +vmxnet3_unmap_tx_buf(struct vmxnet3_tx_buf_info *tbi, + struct pci_dev *pdev) +{ + if (tbi->map_type == VMXNET3_MAP_SINGLE) + dma_unmap_single(&pdev->dev, tbi->dma_addr, tbi->len, + PCI_DMA_TODEVICE); + else if (tbi->map_type == VMXNET3_MAP_PAGE) + dma_unmap_page(&pdev->dev, tbi->dma_addr, tbi->len, + PCI_DMA_TODEVICE); + else + BUG_ON(tbi->map_type != VMXNET3_MAP_NONE); + + tbi->map_type = VMXNET3_MAP_NONE; /* to help debugging */ +} + + +static int +vmxnet3_unmap_pkt(u32 eop_idx, struct vmxnet3_tx_queue *tq, + struct pci_dev *pdev, struct vmxnet3_adapter *adapter) +{ + struct sk_buff *skb; + int entries = 0; + + /* no out of order completion */ + BUG_ON(tq->buf_info[eop_idx].sop_idx != tq->tx_ring.next2comp); + BUG_ON(VMXNET3_TXDESC_GET_EOP(&(tq->tx_ring.base[eop_idx].txd)) != 1); + + skb = tq->buf_info[eop_idx].skb; + BUG_ON(skb == NULL); + tq->buf_info[eop_idx].skb = NULL; + + VMXNET3_INC_RING_IDX_ONLY(eop_idx, tq->tx_ring.size); + + while (tq->tx_ring.next2comp != eop_idx) { + vmxnet3_unmap_tx_buf(tq->buf_info + tq->tx_ring.next2comp, + pdev); + + /* update next2comp w/o tx_lock. Since we are marking more, + * instead of less, tx ring entries avail, the worst case is + * that the tx routine incorrectly re-queues a pkt due to + * insufficient tx ring entries. + */ + vmxnet3_cmd_ring_adv_next2comp(&tq->tx_ring); + entries++; + } + + dev_kfree_skb_any(skb); + return entries; +} + + +static int +vmxnet3_tq_tx_complete(struct vmxnet3_tx_queue *tq, + struct vmxnet3_adapter *adapter) +{ + int completed = 0; + union Vmxnet3_GenericDesc *gdesc; + + gdesc = tq->comp_ring.base + tq->comp_ring.next2proc; + while (VMXNET3_TCD_GET_GEN(&gdesc->tcd) == tq->comp_ring.gen) { + completed += vmxnet3_unmap_pkt(VMXNET3_TCD_GET_TXIDX( + &gdesc->tcd), tq, adapter->pdev, + adapter); + + vmxnet3_comp_ring_adv_next2proc(&tq->comp_ring); + gdesc = tq->comp_ring.base + tq->comp_ring.next2proc; + } + + if (completed) { + spin_lock(&tq->tx_lock); + if (unlikely(vmxnet3_tq_stopped(tq, adapter) && + vmxnet3_cmd_ring_desc_avail(&tq->tx_ring) > + VMXNET3_WAKE_QUEUE_THRESHOLD(tq) && + netif_carrier_ok(adapter->netdev))) { + vmxnet3_tq_wake(tq, adapter); + } + spin_unlock(&tq->tx_lock); + } + return completed; +} + + +static void +vmxnet3_tq_cleanup(struct vmxnet3_tx_queue *tq, + struct vmxnet3_adapter *adapter) +{ + int i; + + while (tq->tx_ring.next2comp != tq->tx_ring.next2fill) { + struct vmxnet3_tx_buf_info *tbi; + + tbi = tq->buf_info + tq->tx_ring.next2comp; + + vmxnet3_unmap_tx_buf(tbi, adapter->pdev); + if (tbi->skb) { + dev_kfree_skb_any(tbi->skb); + tbi->skb = NULL; + } + vmxnet3_cmd_ring_adv_next2comp(&tq->tx_ring); + } + + /* sanity check, verify all buffers are indeed unmapped and freed */ + for (i = 0; i < tq->tx_ring.size; i++) { + BUG_ON(tq->buf_info[i].skb != NULL || + tq->buf_info[i].map_type != VMXNET3_MAP_NONE); + } + + tq->tx_ring.gen = VMXNET3_INIT_GEN; + tq->tx_ring.next2fill = tq->tx_ring.next2comp = 0; + + tq->comp_ring.gen = VMXNET3_INIT_GEN; + tq->comp_ring.next2proc = 0; +} + + +static void +vmxnet3_tq_destroy(struct vmxnet3_tx_queue *tq, + struct vmxnet3_adapter *adapter) +{ + if (tq->tx_ring.base) { + dma_free_coherent(&adapter->pdev->dev, tq->tx_ring.size * + sizeof(struct Vmxnet3_TxDesc), + tq->tx_ring.base, tq->tx_ring.basePA); + tq->tx_ring.base = NULL; + } + if (tq->data_ring.base) { + dma_free_coherent(&adapter->pdev->dev, tq->data_ring.size * + sizeof(struct Vmxnet3_TxDataDesc), + tq->data_ring.base, tq->data_ring.basePA); + tq->data_ring.base = NULL; + } + if (tq->comp_ring.base) { + dma_free_coherent(&adapter->pdev->dev, tq->comp_ring.size * + sizeof(struct Vmxnet3_TxCompDesc), + tq->comp_ring.base, tq->comp_ring.basePA); + tq->comp_ring.base = NULL; + } + if (tq->buf_info) { + dma_free_coherent(&adapter->pdev->dev, + tq->tx_ring.size * sizeof(tq->buf_info[0]), + tq->buf_info, tq->buf_info_pa); + tq->buf_info = NULL; + } +} + + +/* Destroy all tx queues */ +void +vmxnet3_tq_destroy_all(struct vmxnet3_adapter *adapter) +{ + int i; + + for (i = 0; i < adapter->num_tx_queues; i++) + vmxnet3_tq_destroy(&adapter->tx_queue[i], adapter); +} + + +static void +vmxnet3_tq_init(struct vmxnet3_tx_queue *tq, + struct vmxnet3_adapter *adapter) +{ + int i; + + /* reset the tx ring contents to 0 and reset the tx ring states */ + memset(tq->tx_ring.base, 0, tq->tx_ring.size * + sizeof(struct Vmxnet3_TxDesc)); + tq->tx_ring.next2fill = tq->tx_ring.next2comp = 0; + tq->tx_ring.gen = VMXNET3_INIT_GEN; + + memset(tq->data_ring.base, 0, tq->data_ring.size * + sizeof(struct Vmxnet3_TxDataDesc)); + + /* reset the tx comp ring contents to 0 and reset comp ring states */ + memset(tq->comp_ring.base, 0, tq->comp_ring.size * + sizeof(struct Vmxnet3_TxCompDesc)); + tq->comp_ring.next2proc = 0; + tq->comp_ring.gen = VMXNET3_INIT_GEN; + + /* reset the bookkeeping data */ + memset(tq->buf_info, 0, sizeof(tq->buf_info[0]) * tq->tx_ring.size); + for (i = 0; i < tq->tx_ring.size; i++) + tq->buf_info[i].map_type = VMXNET3_MAP_NONE; + + /* stats are not reset */ +} + + +static int +vmxnet3_tq_create(struct vmxnet3_tx_queue *tq, + struct vmxnet3_adapter *adapter) +{ + size_t sz; + + BUG_ON(tq->tx_ring.base || tq->data_ring.base || + tq->comp_ring.base || tq->buf_info); + + tq->tx_ring.base = dma_alloc_coherent(&adapter->pdev->dev, + tq->tx_ring.size * sizeof(struct Vmxnet3_TxDesc), + &tq->tx_ring.basePA, GFP_KERNEL); + if (!tq->tx_ring.base) { + netdev_err(adapter->netdev, "failed to allocate tx ring\n"); + goto err; + } + + tq->data_ring.base = dma_alloc_coherent(&adapter->pdev->dev, + tq->data_ring.size * sizeof(struct Vmxnet3_TxDataDesc), + &tq->data_ring.basePA, GFP_KERNEL); + if (!tq->data_ring.base) { + netdev_err(adapter->netdev, "failed to allocate data ring\n"); + goto err; + } + + tq->comp_ring.base = dma_alloc_coherent(&adapter->pdev->dev, + tq->comp_ring.size * sizeof(struct Vmxnet3_TxCompDesc), + &tq->comp_ring.basePA, GFP_KERNEL); + if (!tq->comp_ring.base) { + netdev_err(adapter->netdev, "failed to allocate tx comp ring\n"); + goto err; + } + + sz = tq->tx_ring.size * sizeof(tq->buf_info[0]); + tq->buf_info = dma_zalloc_coherent(&adapter->pdev->dev, sz, + &tq->buf_info_pa, GFP_KERNEL); + if (!tq->buf_info) + goto err; + + return 0; + +err: + vmxnet3_tq_destroy(tq, adapter); + return -ENOMEM; +} + +static void +vmxnet3_tq_cleanup_all(struct vmxnet3_adapter *adapter) +{ + int i; + + for (i = 0; i < adapter->num_tx_queues; i++) + vmxnet3_tq_cleanup(&adapter->tx_queue[i], adapter); +} + +/* + * starting from ring->next2fill, allocate rx buffers for the given ring + * of the rx queue and update the rx desc. stop after @num_to_alloc buffers + * are allocated or allocation fails + */ + +static int +vmxnet3_rq_alloc_rx_buf(struct vmxnet3_rx_queue *rq, u32 ring_idx, + int num_to_alloc, struct vmxnet3_adapter *adapter) +{ + int num_allocated = 0; + struct vmxnet3_rx_buf_info *rbi_base = rq->buf_info[ring_idx]; + struct vmxnet3_cmd_ring *ring = &rq->rx_ring[ring_idx]; + u32 val; + + while (num_allocated <= num_to_alloc) { + struct vmxnet3_rx_buf_info *rbi; + union Vmxnet3_GenericDesc *gd; + + rbi = rbi_base + ring->next2fill; + gd = ring->base + ring->next2fill; + + if (rbi->buf_type == VMXNET3_RX_BUF_SKB) { + if (rbi->skb == NULL) { + rbi->skb = __netdev_alloc_skb_ip_align(adapter->netdev, + rbi->len, + GFP_KERNEL); + if (unlikely(rbi->skb == NULL)) { + rq->stats.rx_buf_alloc_failure++; + break; + } + + rbi->dma_addr = dma_map_single( + &adapter->pdev->dev, + rbi->skb->data, rbi->len, + PCI_DMA_FROMDEVICE); + } else { + /* rx buffer skipped by the device */ + } + val = VMXNET3_RXD_BTYPE_HEAD << VMXNET3_RXD_BTYPE_SHIFT; + } else { + BUG_ON(rbi->buf_type != VMXNET3_RX_BUF_PAGE || + rbi->len != PAGE_SIZE); + + if (rbi->page == NULL) { + rbi->page = alloc_page(GFP_ATOMIC); + if (unlikely(rbi->page == NULL)) { + rq->stats.rx_buf_alloc_failure++; + break; + } + rbi->dma_addr = dma_map_page( + &adapter->pdev->dev, + rbi->page, 0, PAGE_SIZE, + PCI_DMA_FROMDEVICE); + } else { + /* rx buffers skipped by the device */ + } + val = VMXNET3_RXD_BTYPE_BODY << VMXNET3_RXD_BTYPE_SHIFT; + } + + BUG_ON(rbi->dma_addr == 0); + gd->rxd.addr = cpu_to_le64(rbi->dma_addr); + gd->dword[2] = cpu_to_le32((!ring->gen << VMXNET3_RXD_GEN_SHIFT) + | val | rbi->len); + + /* Fill the last buffer but dont mark it ready, or else the + * device will think that the queue is full */ + if (num_allocated == num_to_alloc) + break; + + gd->dword[2] |= cpu_to_le32(ring->gen << VMXNET3_RXD_GEN_SHIFT); + num_allocated++; + vmxnet3_cmd_ring_adv_next2fill(ring); + } + + netdev_dbg(adapter->netdev, + "alloc_rx_buf: %d allocated, next2fill %u, next2comp %u\n", + num_allocated, ring->next2fill, ring->next2comp); + + /* so that the device can distinguish a full ring and an empty ring */ + BUG_ON(num_allocated != 0 && ring->next2fill == ring->next2comp); + + return num_allocated; +} + + +static void +vmxnet3_append_frag(struct sk_buff *skb, struct Vmxnet3_RxCompDesc *rcd, + struct vmxnet3_rx_buf_info *rbi) +{ + struct skb_frag_struct *frag = skb_shinfo(skb)->frags + + skb_shinfo(skb)->nr_frags; + + BUG_ON(skb_shinfo(skb)->nr_frags >= MAX_SKB_FRAGS); + + __skb_frag_set_page(frag, rbi->page); + frag->page_offset = 0; + skb_frag_size_set(frag, rcd->len); + skb->data_len += rcd->len; + skb->truesize += PAGE_SIZE; + skb_shinfo(skb)->nr_frags++; +} + + +static void +vmxnet3_map_pkt(struct sk_buff *skb, struct vmxnet3_tx_ctx *ctx, + struct vmxnet3_tx_queue *tq, struct pci_dev *pdev, + struct vmxnet3_adapter *adapter) +{ + u32 dw2, len; + unsigned long buf_offset; + int i; + union Vmxnet3_GenericDesc *gdesc; + struct vmxnet3_tx_buf_info *tbi = NULL; + + BUG_ON(ctx->copy_size > skb_headlen(skb)); + + /* use the previous gen bit for the SOP desc */ + dw2 = (tq->tx_ring.gen ^ 0x1) << VMXNET3_TXD_GEN_SHIFT; + + ctx->sop_txd = tq->tx_ring.base + tq->tx_ring.next2fill; + gdesc = ctx->sop_txd; /* both loops below can be skipped */ + + /* no need to map the buffer if headers are copied */ + if (ctx->copy_size) { + ctx->sop_txd->txd.addr = cpu_to_le64(tq->data_ring.basePA + + tq->tx_ring.next2fill * + sizeof(struct Vmxnet3_TxDataDesc)); + ctx->sop_txd->dword[2] = cpu_to_le32(dw2 | ctx->copy_size); + ctx->sop_txd->dword[3] = 0; + + tbi = tq->buf_info + tq->tx_ring.next2fill; + tbi->map_type = VMXNET3_MAP_NONE; + + netdev_dbg(adapter->netdev, + "txd[%u]: 0x%Lx 0x%x 0x%x\n", + tq->tx_ring.next2fill, + le64_to_cpu(ctx->sop_txd->txd.addr), + ctx->sop_txd->dword[2], ctx->sop_txd->dword[3]); + vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring); + + /* use the right gen for non-SOP desc */ + dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT; + } + + /* linear part can use multiple tx desc if it's big */ + len = skb_headlen(skb) - ctx->copy_size; + buf_offset = ctx->copy_size; + while (len) { + u32 buf_size; + + if (len < VMXNET3_MAX_TX_BUF_SIZE) { + buf_size = len; + dw2 |= len; + } else { + buf_size = VMXNET3_MAX_TX_BUF_SIZE; + /* spec says that for TxDesc.len, 0 == 2^14 */ + } + + tbi = tq->buf_info + tq->tx_ring.next2fill; + tbi->map_type = VMXNET3_MAP_SINGLE; + tbi->dma_addr = dma_map_single(&adapter->pdev->dev, + skb->data + buf_offset, buf_size, + PCI_DMA_TODEVICE); + + tbi->len = buf_size; + + gdesc = tq->tx_ring.base + tq->tx_ring.next2fill; + BUG_ON(gdesc->txd.gen == tq->tx_ring.gen); + + gdesc->txd.addr = cpu_to_le64(tbi->dma_addr); + gdesc->dword[2] = cpu_to_le32(dw2); + gdesc->dword[3] = 0; + + netdev_dbg(adapter->netdev, + "txd[%u]: 0x%Lx 0x%x 0x%x\n", + tq->tx_ring.next2fill, le64_to_cpu(gdesc->txd.addr), + le32_to_cpu(gdesc->dword[2]), gdesc->dword[3]); + vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring); + dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT; + + len -= buf_size; + buf_offset += buf_size; + } + + for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { + const struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i]; + u32 buf_size; + + buf_offset = 0; + len = skb_frag_size(frag); + while (len) { + tbi = tq->buf_info + tq->tx_ring.next2fill; + if (len < VMXNET3_MAX_TX_BUF_SIZE) { + buf_size = len; + dw2 |= len; + } else { + buf_size = VMXNET3_MAX_TX_BUF_SIZE; + /* spec says that for TxDesc.len, 0 == 2^14 */ + } + tbi->map_type = VMXNET3_MAP_PAGE; + tbi->dma_addr = skb_frag_dma_map(&adapter->pdev->dev, frag, + buf_offset, buf_size, + DMA_TO_DEVICE); + + tbi->len = buf_size; + + gdesc = tq->tx_ring.base + tq->tx_ring.next2fill; + BUG_ON(gdesc->txd.gen == tq->tx_ring.gen); + + gdesc->txd.addr = cpu_to_le64(tbi->dma_addr); + gdesc->dword[2] = cpu_to_le32(dw2); + gdesc->dword[3] = 0; + + netdev_dbg(adapter->netdev, + "txd[%u]: 0x%llx %u %u\n", + tq->tx_ring.next2fill, le64_to_cpu(gdesc->txd.addr), + le32_to_cpu(gdesc->dword[2]), gdesc->dword[3]); + vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring); + dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT; + + len -= buf_size; + buf_offset += buf_size; + } + } + + ctx->eop_txd = gdesc; + + /* set the last buf_info for the pkt */ + tbi->skb = skb; + tbi->sop_idx = ctx->sop_txd - tq->tx_ring.base; +} + + +/* Init all tx queues */ +static void +vmxnet3_tq_init_all(struct vmxnet3_adapter *adapter) +{ + int i; + + for (i = 0; i < adapter->num_tx_queues; i++) + vmxnet3_tq_init(&adapter->tx_queue[i], adapter); +} + + +/* + * parse and copy relevant protocol headers: + * For a tso pkt, relevant headers are L2/3/4 including options + * For a pkt requesting csum offloading, they are L2/3 and may include L4 + * if it's a TCP/UDP pkt + * + * Returns: + * -1: error happens during parsing + * 0: protocol headers parsed, but too big to be copied + * 1: protocol headers parsed and copied + * + * Other effects: + * 1. related *ctx fields are updated. + * 2. ctx->copy_size is # of bytes copied + * 3. the portion copied is guaranteed to be in the linear part + * + */ +static int +vmxnet3_parse_and_copy_hdr(struct sk_buff *skb, struct vmxnet3_tx_queue *tq, + struct vmxnet3_tx_ctx *ctx, + struct vmxnet3_adapter *adapter) +{ + struct Vmxnet3_TxDataDesc *tdd; + u8 protocol = 0; + + if (ctx->mss) { /* TSO */ + ctx->eth_ip_hdr_size = skb_transport_offset(skb); + ctx->l4_hdr_size = tcp_hdrlen(skb); + ctx->copy_size = ctx->eth_ip_hdr_size + ctx->l4_hdr_size; + } else { + if (skb->ip_summed == CHECKSUM_PARTIAL) { + ctx->eth_ip_hdr_size = skb_checksum_start_offset(skb); + + if (ctx->ipv4) { + const struct iphdr *iph = ip_hdr(skb); + + protocol = iph->protocol; + } else if (ctx->ipv6) { + const struct ipv6hdr *ipv6h = ipv6_hdr(skb); + + protocol = ipv6h->nexthdr; + } + + switch (protocol) { + case IPPROTO_TCP: + ctx->l4_hdr_size = tcp_hdrlen(skb); + break; + case IPPROTO_UDP: + ctx->l4_hdr_size = sizeof(struct udphdr); + break; + default: + ctx->l4_hdr_size = 0; + break; + } + + ctx->copy_size = min(ctx->eth_ip_hdr_size + + ctx->l4_hdr_size, skb->len); + } else { + ctx->eth_ip_hdr_size = 0; + ctx->l4_hdr_size = 0; + /* copy as much as allowed */ + ctx->copy_size = min((unsigned int)VMXNET3_HDR_COPY_SIZE + , skb_headlen(skb)); + } + + /* make sure headers are accessible directly */ + if (unlikely(!pskb_may_pull(skb, ctx->copy_size))) + goto err; + } + + if (unlikely(ctx->copy_size > VMXNET3_HDR_COPY_SIZE)) { + tq->stats.oversized_hdr++; + ctx->copy_size = 0; + return 0; + } + + tdd = tq->data_ring.base + tq->tx_ring.next2fill; + + memcpy(tdd->data, skb->data, ctx->copy_size); + netdev_dbg(adapter->netdev, + "copy %u bytes to dataRing[%u]\n", + ctx->copy_size, tq->tx_ring.next2fill); + return 1; + +err: + return -1; +} + + +static void +vmxnet3_prepare_tso(struct sk_buff *skb, + struct vmxnet3_tx_ctx *ctx) +{ + struct tcphdr *tcph = tcp_hdr(skb); + + if (ctx->ipv4) { + struct iphdr *iph = ip_hdr(skb); + + iph->check = 0; + tcph->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr, 0, + IPPROTO_TCP, 0); + } else if (ctx->ipv6) { + struct ipv6hdr *iph = ipv6_hdr(skb); + + tcph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, 0, + IPPROTO_TCP, 0); + } +} + +static int txd_estimate(const struct sk_buff *skb) +{ + int count = VMXNET3_TXD_NEEDED(skb_headlen(skb)) + 1; + int i; + + for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { + const struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i]; + + count += VMXNET3_TXD_NEEDED(skb_frag_size(frag)); + } + return count; +} + +/* + * Transmits a pkt thru a given tq + * Returns: + * NETDEV_TX_OK: descriptors are setup successfully + * NETDEV_TX_OK: error occurred, the pkt is dropped + * NETDEV_TX_BUSY: tx ring is full, queue is stopped + * + * Side-effects: + * 1. tx ring may be changed + * 2. tq stats may be updated accordingly + * 3. shared->txNumDeferred may be updated + */ + +static int +vmxnet3_tq_xmit(struct sk_buff *skb, struct vmxnet3_tx_queue *tq, + struct vmxnet3_adapter *adapter, struct net_device *netdev) +{ + int ret; + u32 count; + unsigned long flags; + struct vmxnet3_tx_ctx ctx; + union Vmxnet3_GenericDesc *gdesc; +#ifdef __BIG_ENDIAN_BITFIELD + /* Use temporary descriptor to avoid touching bits multiple times */ + union Vmxnet3_GenericDesc tempTxDesc; +#endif + + count = txd_estimate(skb); + + ctx.ipv4 = (vlan_get_protocol(skb) == cpu_to_be16(ETH_P_IP)); + ctx.ipv6 = (vlan_get_protocol(skb) == cpu_to_be16(ETH_P_IPV6)); + + ctx.mss = skb_shinfo(skb)->gso_size; + if (ctx.mss) { + if (skb_header_cloned(skb)) { + if (unlikely(pskb_expand_head(skb, 0, 0, + GFP_ATOMIC) != 0)) { + tq->stats.drop_tso++; + goto drop_pkt; + } + tq->stats.copy_skb_header++; + } + vmxnet3_prepare_tso(skb, &ctx); + } else { + if (unlikely(count > VMXNET3_MAX_TXD_PER_PKT)) { + + /* non-tso pkts must not use more than + * VMXNET3_MAX_TXD_PER_PKT entries + */ + if (skb_linearize(skb) != 0) { + tq->stats.drop_too_many_frags++; + goto drop_pkt; + } + tq->stats.linearized++; + + /* recalculate the # of descriptors to use */ + count = VMXNET3_TXD_NEEDED(skb_headlen(skb)) + 1; + } + } + + spin_lock_irqsave(&tq->tx_lock, flags); + + if (count > vmxnet3_cmd_ring_desc_avail(&tq->tx_ring)) { + tq->stats.tx_ring_full++; + netdev_dbg(adapter->netdev, + "tx queue stopped on %s, next2comp %u" + " next2fill %u\n", adapter->netdev->name, + tq->tx_ring.next2comp, tq->tx_ring.next2fill); + + vmxnet3_tq_stop(tq, adapter); + spin_unlock_irqrestore(&tq->tx_lock, flags); + return NETDEV_TX_BUSY; + } + + + ret = vmxnet3_parse_and_copy_hdr(skb, tq, &ctx, adapter); + if (ret >= 0) { + BUG_ON(ret <= 0 && ctx.copy_size != 0); + /* hdrs parsed, check against other limits */ + if (ctx.mss) { + if (unlikely(ctx.eth_ip_hdr_size + ctx.l4_hdr_size > + VMXNET3_MAX_TX_BUF_SIZE)) { + goto hdr_too_big; + } + } else { + if (skb->ip_summed == CHECKSUM_PARTIAL) { + if (unlikely(ctx.eth_ip_hdr_size + + skb->csum_offset > + VMXNET3_MAX_CSUM_OFFSET)) { + goto hdr_too_big; + } + } + } + } else { + tq->stats.drop_hdr_inspect_err++; + goto unlock_drop_pkt; + } + + /* fill tx descs related to addr & len */ + vmxnet3_map_pkt(skb, &ctx, tq, adapter->pdev, adapter); + + /* setup the EOP desc */ + ctx.eop_txd->dword[3] = cpu_to_le32(VMXNET3_TXD_CQ | VMXNET3_TXD_EOP); + + /* setup the SOP desc */ +#ifdef __BIG_ENDIAN_BITFIELD + gdesc = &tempTxDesc; + gdesc->dword[2] = ctx.sop_txd->dword[2]; + gdesc->dword[3] = ctx.sop_txd->dword[3]; +#else + gdesc = ctx.sop_txd; +#endif + if (ctx.mss) { + gdesc->txd.hlen = ctx.eth_ip_hdr_size + ctx.l4_hdr_size; + gdesc->txd.om = VMXNET3_OM_TSO; + gdesc->txd.msscof = ctx.mss; + le32_add_cpu(&tq->shared->txNumDeferred, (skb->len - + gdesc->txd.hlen + ctx.mss - 1) / ctx.mss); + } else { + if (skb->ip_summed == CHECKSUM_PARTIAL) { + gdesc->txd.hlen = ctx.eth_ip_hdr_size; + gdesc->txd.om = VMXNET3_OM_CSUM; + gdesc->txd.msscof = ctx.eth_ip_hdr_size + + skb->csum_offset; + } else { + gdesc->txd.om = 0; + gdesc->txd.msscof = 0; + } + le32_add_cpu(&tq->shared->txNumDeferred, 1); + } + + if (skb_vlan_tag_present(skb)) { + gdesc->txd.ti = 1; + gdesc->txd.tci = skb_vlan_tag_get(skb); + } + + /* finally flips the GEN bit of the SOP desc. */ + gdesc->dword[2] = cpu_to_le32(le32_to_cpu(gdesc->dword[2]) ^ + VMXNET3_TXD_GEN); +#ifdef __BIG_ENDIAN_BITFIELD + /* Finished updating in bitfields of Tx Desc, so write them in original + * place. + */ + vmxnet3_TxDescToLe((struct Vmxnet3_TxDesc *)gdesc, + (struct Vmxnet3_TxDesc *)ctx.sop_txd); + gdesc = ctx.sop_txd; +#endif + netdev_dbg(adapter->netdev, + "txd[%u]: SOP 0x%Lx 0x%x 0x%x\n", + (u32)(ctx.sop_txd - + tq->tx_ring.base), le64_to_cpu(gdesc->txd.addr), + le32_to_cpu(gdesc->dword[2]), le32_to_cpu(gdesc->dword[3])); + + spin_unlock_irqrestore(&tq->tx_lock, flags); + + if (le32_to_cpu(tq->shared->txNumDeferred) >= + le32_to_cpu(tq->shared->txThreshold)) { + tq->shared->txNumDeferred = 0; + VMXNET3_WRITE_BAR0_REG(adapter, + VMXNET3_REG_TXPROD + tq->qid * 8, + tq->tx_ring.next2fill); + } + + return NETDEV_TX_OK; + +hdr_too_big: + tq->stats.drop_oversized_hdr++; +unlock_drop_pkt: + spin_unlock_irqrestore(&tq->tx_lock, flags); +drop_pkt: + tq->stats.drop_total++; + dev_kfree_skb_any(skb); + return NETDEV_TX_OK; +} + + +static netdev_tx_t +vmxnet3_xmit_frame(struct sk_buff *skb, struct net_device *netdev) +{ + struct vmxnet3_adapter *adapter = netdev_priv(netdev); + + BUG_ON(skb->queue_mapping > adapter->num_tx_queues); + return vmxnet3_tq_xmit(skb, + &adapter->tx_queue[skb->queue_mapping], + adapter, netdev); +} + + +static void +vmxnet3_rx_csum(struct vmxnet3_adapter *adapter, + struct sk_buff *skb, + union Vmxnet3_GenericDesc *gdesc) +{ + if (!gdesc->rcd.cnc && adapter->netdev->features & NETIF_F_RXCSUM) { + /* typical case: TCP/UDP over IP and both csums are correct */ + if ((le32_to_cpu(gdesc->dword[3]) & VMXNET3_RCD_CSUM_OK) == + VMXNET3_RCD_CSUM_OK) { + skb->ip_summed = CHECKSUM_UNNECESSARY; + BUG_ON(!(gdesc->rcd.tcp || gdesc->rcd.udp)); + BUG_ON(!(gdesc->rcd.v4 || gdesc->rcd.v6)); + BUG_ON(gdesc->rcd.frg); + } else { + if (gdesc->rcd.csum) { + skb->csum = htons(gdesc->rcd.csum); + skb->ip_summed = CHECKSUM_PARTIAL; + } else { + skb_checksum_none_assert(skb); + } + } + } else { + skb_checksum_none_assert(skb); + } +} + + +static void +vmxnet3_rx_error(struct vmxnet3_rx_queue *rq, struct Vmxnet3_RxCompDesc *rcd, + struct vmxnet3_rx_ctx *ctx, struct vmxnet3_adapter *adapter) +{ + rq->stats.drop_err++; + if (!rcd->fcs) + rq->stats.drop_fcs++; + + rq->stats.drop_total++; + + /* + * We do not unmap and chain the rx buffer to the skb. + * We basically pretend this buffer is not used and will be recycled + * by vmxnet3_rq_alloc_rx_buf() + */ + + /* + * ctx->skb may be NULL if this is the first and the only one + * desc for the pkt + */ + if (ctx->skb) + dev_kfree_skb_irq(ctx->skb); + + ctx->skb = NULL; +} + + +static int +vmxnet3_rq_rx_complete(struct vmxnet3_rx_queue *rq, + struct vmxnet3_adapter *adapter, int quota) +{ + static const u32 rxprod_reg[2] = { + VMXNET3_REG_RXPROD, VMXNET3_REG_RXPROD2 + }; + u32 num_rxd = 0; + bool skip_page_frags = false; + struct Vmxnet3_RxCompDesc *rcd; + struct vmxnet3_rx_ctx *ctx = &rq->rx_ctx; +#ifdef __BIG_ENDIAN_BITFIELD + struct Vmxnet3_RxDesc rxCmdDesc; + struct Vmxnet3_RxCompDesc rxComp; +#endif + vmxnet3_getRxComp(rcd, &rq->comp_ring.base[rq->comp_ring.next2proc].rcd, + &rxComp); + while (rcd->gen == rq->comp_ring.gen) { + struct vmxnet3_rx_buf_info *rbi; + struct sk_buff *skb, *new_skb = NULL; + struct page *new_page = NULL; + int num_to_alloc; + struct Vmxnet3_RxDesc *rxd; + u32 idx, ring_idx; + struct vmxnet3_cmd_ring *ring = NULL; + if (num_rxd >= quota) { + /* we may stop even before we see the EOP desc of + * the current pkt + */ + break; + } + num_rxd++; + BUG_ON(rcd->rqID != rq->qid && rcd->rqID != rq->qid2); + idx = rcd->rxdIdx; + ring_idx = rcd->rqID < adapter->num_rx_queues ? 0 : 1; + ring = rq->rx_ring + ring_idx; + vmxnet3_getRxDesc(rxd, &rq->rx_ring[ring_idx].base[idx].rxd, + &rxCmdDesc); + rbi = rq->buf_info[ring_idx] + idx; + + BUG_ON(rxd->addr != rbi->dma_addr || + rxd->len != rbi->len); + + if (unlikely(rcd->eop && rcd->err)) { + vmxnet3_rx_error(rq, rcd, ctx, adapter); + goto rcd_done; + } + + if (rcd->sop) { /* first buf of the pkt */ + BUG_ON(rxd->btype != VMXNET3_RXD_BTYPE_HEAD || + rcd->rqID != rq->qid); + + BUG_ON(rbi->buf_type != VMXNET3_RX_BUF_SKB); + BUG_ON(ctx->skb != NULL || rbi->skb == NULL); + + if (unlikely(rcd->len == 0)) { + /* Pretend the rx buffer is skipped. */ + BUG_ON(!(rcd->sop && rcd->eop)); + netdev_dbg(adapter->netdev, + "rxRing[%u][%u] 0 length\n", + ring_idx, idx); + goto rcd_done; + } + + skip_page_frags = false; + ctx->skb = rbi->skb; + new_skb = netdev_alloc_skb_ip_align(adapter->netdev, + rbi->len); + if (new_skb == NULL) { + /* Skb allocation failed, do not handover this + * skb to stack. Reuse it. Drop the existing pkt + */ + rq->stats.rx_buf_alloc_failure++; + ctx->skb = NULL; + rq->stats.drop_total++; + skip_page_frags = true; + goto rcd_done; + } + + dma_unmap_single(&adapter->pdev->dev, rbi->dma_addr, + rbi->len, + PCI_DMA_FROMDEVICE); + +#ifdef VMXNET3_RSS + if (rcd->rssType != VMXNET3_RCD_RSS_TYPE_NONE && + (adapter->netdev->features & NETIF_F_RXHASH)) + skb_set_hash(ctx->skb, + le32_to_cpu(rcd->rssHash), + PKT_HASH_TYPE_L3); +#endif + skb_put(ctx->skb, rcd->len); + + /* Immediate refill */ + rbi->skb = new_skb; + rbi->dma_addr = dma_map_single(&adapter->pdev->dev, + rbi->skb->data, rbi->len, + PCI_DMA_FROMDEVICE); + rxd->addr = cpu_to_le64(rbi->dma_addr); + rxd->len = rbi->len; + + } else { + BUG_ON(ctx->skb == NULL && !skip_page_frags); + + /* non SOP buffer must be type 1 in most cases */ + BUG_ON(rbi->buf_type != VMXNET3_RX_BUF_PAGE); + BUG_ON(rxd->btype != VMXNET3_RXD_BTYPE_BODY); + + /* If an sop buffer was dropped, skip all + * following non-sop fragments. They will be reused. + */ + if (skip_page_frags) + goto rcd_done; + + new_page = alloc_page(GFP_ATOMIC); + if (unlikely(new_page == NULL)) { + /* Replacement page frag could not be allocated. + * Reuse this page. Drop the pkt and free the + * skb which contained this page as a frag. Skip + * processing all the following non-sop frags. + */ + rq->stats.rx_buf_alloc_failure++; + dev_kfree_skb(ctx->skb); + ctx->skb = NULL; + skip_page_frags = true; + goto rcd_done; + } + + if (rcd->len) { + dma_unmap_page(&adapter->pdev->dev, + rbi->dma_addr, rbi->len, + PCI_DMA_FROMDEVICE); + + vmxnet3_append_frag(ctx->skb, rcd, rbi); + } + + /* Immediate refill */ + rbi->page = new_page; + rbi->dma_addr = dma_map_page(&adapter->pdev->dev, + rbi->page, + 0, PAGE_SIZE, + PCI_DMA_FROMDEVICE); + rxd->addr = cpu_to_le64(rbi->dma_addr); + rxd->len = rbi->len; + } + + + skb = ctx->skb; + if (rcd->eop) { + skb->len += skb->data_len; + + vmxnet3_rx_csum(adapter, skb, + (union Vmxnet3_GenericDesc *)rcd); + skb->protocol = eth_type_trans(skb, adapter->netdev); + + if (unlikely(rcd->ts)) + __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), rcd->tci); + + if (adapter->netdev->features & NETIF_F_LRO) + netif_receive_skb(skb); + else + napi_gro_receive(&rq->napi, skb); + + ctx->skb = NULL; + } + +rcd_done: + /* device may have skipped some rx descs */ + ring->next2comp = idx; + num_to_alloc = vmxnet3_cmd_ring_desc_avail(ring); + ring = rq->rx_ring + ring_idx; + while (num_to_alloc) { + vmxnet3_getRxDesc(rxd, &ring->base[ring->next2fill].rxd, + &rxCmdDesc); + BUG_ON(!rxd->addr); + + /* Recv desc is ready to be used by the device */ + rxd->gen = ring->gen; + vmxnet3_cmd_ring_adv_next2fill(ring); + num_to_alloc--; + } + + /* if needed, update the register */ + if (unlikely(rq->shared->updateRxProd)) { + VMXNET3_WRITE_BAR0_REG(adapter, + rxprod_reg[ring_idx] + rq->qid * 8, + ring->next2fill); + } + + vmxnet3_comp_ring_adv_next2proc(&rq->comp_ring); + vmxnet3_getRxComp(rcd, + &rq->comp_ring.base[rq->comp_ring.next2proc].rcd, &rxComp); + } + + return num_rxd; +} + + +static void +vmxnet3_rq_cleanup(struct vmxnet3_rx_queue *rq, + struct vmxnet3_adapter *adapter) +{ + u32 i, ring_idx; + struct Vmxnet3_RxDesc *rxd; + + for (ring_idx = 0; ring_idx < 2; ring_idx++) { + for (i = 0; i < rq->rx_ring[ring_idx].size; i++) { +#ifdef __BIG_ENDIAN_BITFIELD + struct Vmxnet3_RxDesc rxDesc; +#endif + vmxnet3_getRxDesc(rxd, + &rq->rx_ring[ring_idx].base[i].rxd, &rxDesc); + + if (rxd->btype == VMXNET3_RXD_BTYPE_HEAD && + rq->buf_info[ring_idx][i].skb) { + dma_unmap_single(&adapter->pdev->dev, rxd->addr, + rxd->len, PCI_DMA_FROMDEVICE); + dev_kfree_skb(rq->buf_info[ring_idx][i].skb); + rq->buf_info[ring_idx][i].skb = NULL; + } else if (rxd->btype == VMXNET3_RXD_BTYPE_BODY && + rq->buf_info[ring_idx][i].page) { + dma_unmap_page(&adapter->pdev->dev, rxd->addr, + rxd->len, PCI_DMA_FROMDEVICE); + put_page(rq->buf_info[ring_idx][i].page); + rq->buf_info[ring_idx][i].page = NULL; + } + } + + rq->rx_ring[ring_idx].gen = VMXNET3_INIT_GEN; + rq->rx_ring[ring_idx].next2fill = + rq->rx_ring[ring_idx].next2comp = 0; + } + + rq->comp_ring.gen = VMXNET3_INIT_GEN; + rq->comp_ring.next2proc = 0; +} + + +static void +vmxnet3_rq_cleanup_all(struct vmxnet3_adapter *adapter) +{ + int i; + + for (i = 0; i < adapter->num_rx_queues; i++) + vmxnet3_rq_cleanup(&adapter->rx_queue[i], adapter); +} + + +static void vmxnet3_rq_destroy(struct vmxnet3_rx_queue *rq, + struct vmxnet3_adapter *adapter) +{ + int i; + int j; + + /* all rx buffers must have already been freed */ + for (i = 0; i < 2; i++) { + if (rq->buf_info[i]) { + for (j = 0; j < rq->rx_ring[i].size; j++) + BUG_ON(rq->buf_info[i][j].page != NULL); + } + } + + + for (i = 0; i < 2; i++) { + if (rq->rx_ring[i].base) { + dma_free_coherent(&adapter->pdev->dev, + rq->rx_ring[i].size + * sizeof(struct Vmxnet3_RxDesc), + rq->rx_ring[i].base, + rq->rx_ring[i].basePA); + rq->rx_ring[i].base = NULL; + } + rq->buf_info[i] = NULL; + } + + if (rq->comp_ring.base) { + dma_free_coherent(&adapter->pdev->dev, rq->comp_ring.size + * sizeof(struct Vmxnet3_RxCompDesc), + rq->comp_ring.base, rq->comp_ring.basePA); + rq->comp_ring.base = NULL; + } + + if (rq->buf_info[0]) { + size_t sz = sizeof(struct vmxnet3_rx_buf_info) * + (rq->rx_ring[0].size + rq->rx_ring[1].size); + dma_free_coherent(&adapter->pdev->dev, sz, rq->buf_info[0], + rq->buf_info_pa); + } +} + + +static int +vmxnet3_rq_init(struct vmxnet3_rx_queue *rq, + struct vmxnet3_adapter *adapter) +{ + int i; + + /* initialize buf_info */ + for (i = 0; i < rq->rx_ring[0].size; i++) { + + /* 1st buf for a pkt is skbuff */ + if (i % adapter->rx_buf_per_pkt == 0) { + rq->buf_info[0][i].buf_type = VMXNET3_RX_BUF_SKB; + rq->buf_info[0][i].len = adapter->skb_buf_size; + } else { /* subsequent bufs for a pkt is frag */ + rq->buf_info[0][i].buf_type = VMXNET3_RX_BUF_PAGE; + rq->buf_info[0][i].len = PAGE_SIZE; + } + } + for (i = 0; i < rq->rx_ring[1].size; i++) { + rq->buf_info[1][i].buf_type = VMXNET3_RX_BUF_PAGE; + rq->buf_info[1][i].len = PAGE_SIZE; + } + + /* reset internal state and allocate buffers for both rings */ + for (i = 0; i < 2; i++) { + rq->rx_ring[i].next2fill = rq->rx_ring[i].next2comp = 0; + + memset(rq->rx_ring[i].base, 0, rq->rx_ring[i].size * + sizeof(struct Vmxnet3_RxDesc)); + rq->rx_ring[i].gen = VMXNET3_INIT_GEN; + } + if (vmxnet3_rq_alloc_rx_buf(rq, 0, rq->rx_ring[0].size - 1, + adapter) == 0) { + /* at least has 1 rx buffer for the 1st ring */ + return -ENOMEM; + } + vmxnet3_rq_alloc_rx_buf(rq, 1, rq->rx_ring[1].size - 1, adapter); + + /* reset the comp ring */ + rq->comp_ring.next2proc = 0; + memset(rq->comp_ring.base, 0, rq->comp_ring.size * + sizeof(struct Vmxnet3_RxCompDesc)); + rq->comp_ring.gen = VMXNET3_INIT_GEN; + + /* reset rxctx */ + rq->rx_ctx.skb = NULL; + + /* stats are not reset */ + return 0; +} + + +static int +vmxnet3_rq_init_all(struct vmxnet3_adapter *adapter) +{ + int i, err = 0; + + for (i = 0; i < adapter->num_rx_queues; i++) { + err = vmxnet3_rq_init(&adapter->rx_queue[i], adapter); + if (unlikely(err)) { + dev_err(&adapter->netdev->dev, "%s: failed to " + "initialize rx queue%i\n", + adapter->netdev->name, i); + break; + } + } + return err; + +} + + +static int +vmxnet3_rq_create(struct vmxnet3_rx_queue *rq, struct vmxnet3_adapter *adapter) +{ + int i; + size_t sz; + struct vmxnet3_rx_buf_info *bi; + + for (i = 0; i < 2; i++) { + + sz = rq->rx_ring[i].size * sizeof(struct Vmxnet3_RxDesc); + rq->rx_ring[i].base = dma_alloc_coherent( + &adapter->pdev->dev, sz, + &rq->rx_ring[i].basePA, + GFP_KERNEL); + if (!rq->rx_ring[i].base) { + netdev_err(adapter->netdev, + "failed to allocate rx ring %d\n", i); + goto err; + } + } + + sz = rq->comp_ring.size * sizeof(struct Vmxnet3_RxCompDesc); + rq->comp_ring.base = dma_alloc_coherent(&adapter->pdev->dev, sz, + &rq->comp_ring.basePA, + GFP_KERNEL); + if (!rq->comp_ring.base) { + netdev_err(adapter->netdev, "failed to allocate rx comp ring\n"); + goto err; + } + + sz = sizeof(struct vmxnet3_rx_buf_info) * (rq->rx_ring[0].size + + rq->rx_ring[1].size); + bi = dma_zalloc_coherent(&adapter->pdev->dev, sz, &rq->buf_info_pa, + GFP_KERNEL); + if (!bi) + goto err; + + rq->buf_info[0] = bi; + rq->buf_info[1] = bi + rq->rx_ring[0].size; + + return 0; + +err: + vmxnet3_rq_destroy(rq, adapter); + return -ENOMEM; +} + + +static int +vmxnet3_rq_create_all(struct vmxnet3_adapter *adapter) +{ + int i, err = 0; + + for (i = 0; i < adapter->num_rx_queues; i++) { + err = vmxnet3_rq_create(&adapter->rx_queue[i], adapter); + if (unlikely(err)) { + dev_err(&adapter->netdev->dev, + "%s: failed to create rx queue%i\n", + adapter->netdev->name, i); + goto err_out; + } + } + return err; +err_out: + vmxnet3_rq_destroy_all(adapter); + return err; + +} + +/* Multiple queue aware polling function for tx and rx */ + +static int +vmxnet3_do_poll(struct vmxnet3_adapter *adapter, int budget) +{ + int rcd_done = 0, i; + if (unlikely(adapter->shared->ecr)) + vmxnet3_process_events(adapter); + for (i = 0; i < adapter->num_tx_queues; i++) + vmxnet3_tq_tx_complete(&adapter->tx_queue[i], adapter); + + for (i = 0; i < adapter->num_rx_queues; i++) + rcd_done += vmxnet3_rq_rx_complete(&adapter->rx_queue[i], + adapter, budget); + return rcd_done; +} + + +static int +vmxnet3_poll(struct napi_struct *napi, int budget) +{ + struct vmxnet3_rx_queue *rx_queue = container_of(napi, + struct vmxnet3_rx_queue, napi); + int rxd_done; + + rxd_done = vmxnet3_do_poll(rx_queue->adapter, budget); + + if (rxd_done < budget) { + napi_complete(napi); + vmxnet3_enable_all_intrs(rx_queue->adapter); + } + return rxd_done; +} + +/* + * NAPI polling function for MSI-X mode with multiple Rx queues + * Returns the # of the NAPI credit consumed (# of rx descriptors processed) + */ + +static int +vmxnet3_poll_rx_only(struct napi_struct *napi, int budget) +{ + struct vmxnet3_rx_queue *rq = container_of(napi, + struct vmxnet3_rx_queue, napi); + struct vmxnet3_adapter *adapter = rq->adapter; + int rxd_done; + + /* When sharing interrupt with corresponding tx queue, process + * tx completions in that queue as well + */ + if (adapter->share_intr == VMXNET3_INTR_BUDDYSHARE) { + struct vmxnet3_tx_queue *tq = + &adapter->tx_queue[rq - adapter->rx_queue]; + vmxnet3_tq_tx_complete(tq, adapter); + } + + rxd_done = vmxnet3_rq_rx_complete(rq, adapter, budget); + + if (rxd_done < budget) { + napi_complete(napi); + vmxnet3_enable_intr(adapter, rq->comp_ring.intr_idx); + } + return rxd_done; +} + + +#ifdef CONFIG_PCI_MSI + +/* + * Handle completion interrupts on tx queues + * Returns whether or not the intr is handled + */ + +static irqreturn_t +vmxnet3_msix_tx(int irq, void *data) +{ + struct vmxnet3_tx_queue *tq = data; + struct vmxnet3_adapter *adapter = tq->adapter; + + if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE) + vmxnet3_disable_intr(adapter, tq->comp_ring.intr_idx); + + /* Handle the case where only one irq is allocate for all tx queues */ + if (adapter->share_intr == VMXNET3_INTR_TXSHARE) { + int i; + for (i = 0; i < adapter->num_tx_queues; i++) { + struct vmxnet3_tx_queue *txq = &adapter->tx_queue[i]; + vmxnet3_tq_tx_complete(txq, adapter); + } + } else { + vmxnet3_tq_tx_complete(tq, adapter); + } + vmxnet3_enable_intr(adapter, tq->comp_ring.intr_idx); + + return IRQ_HANDLED; +} + + +/* + * Handle completion interrupts on rx queues. Returns whether or not the + * intr is handled + */ + +static irqreturn_t +vmxnet3_msix_rx(int irq, void *data) +{ + struct vmxnet3_rx_queue *rq = data; + struct vmxnet3_adapter *adapter = rq->adapter; + + /* disable intr if needed */ + if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE) + vmxnet3_disable_intr(adapter, rq->comp_ring.intr_idx); + napi_schedule(&rq->napi); + + return IRQ_HANDLED; +} + +/* + *---------------------------------------------------------------------------- + * + * vmxnet3_msix_event -- + * + * vmxnet3 msix event intr handler + * + * Result: + * whether or not the intr is handled + * + *---------------------------------------------------------------------------- + */ + +static irqreturn_t +vmxnet3_msix_event(int irq, void *data) +{ + struct net_device *dev = data; + struct vmxnet3_adapter *adapter = netdev_priv(dev); + + /* disable intr if needed */ + if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE) + vmxnet3_disable_intr(adapter, adapter->intr.event_intr_idx); + + if (adapter->shared->ecr) + vmxnet3_process_events(adapter); + + vmxnet3_enable_intr(adapter, adapter->intr.event_intr_idx); + + return IRQ_HANDLED; +} + +#endif /* CONFIG_PCI_MSI */ + + +/* Interrupt handler for vmxnet3 */ +static irqreturn_t +vmxnet3_intr(int irq, void *dev_id) +{ + struct net_device *dev = dev_id; + struct vmxnet3_adapter *adapter = netdev_priv(dev); + + if (adapter->intr.type == VMXNET3_IT_INTX) { + u32 icr = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_ICR); + if (unlikely(icr == 0)) + /* not ours */ + return IRQ_NONE; + } + + + /* disable intr if needed */ + if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE) + vmxnet3_disable_all_intrs(adapter); + + napi_schedule(&adapter->rx_queue[0].napi); + + return IRQ_HANDLED; +} + +#ifdef CONFIG_NET_POLL_CONTROLLER + +/* netpoll callback. */ +static void +vmxnet3_netpoll(struct net_device *netdev) +{ + struct vmxnet3_adapter *adapter = netdev_priv(netdev); + + switch (adapter->intr.type) { +#ifdef CONFIG_PCI_MSI + case VMXNET3_IT_MSIX: { + int i; + for (i = 0; i < adapter->num_rx_queues; i++) + vmxnet3_msix_rx(0, &adapter->rx_queue[i]); + break; + } +#endif + case VMXNET3_IT_MSI: + default: + vmxnet3_intr(0, adapter->netdev); + break; + } + +} +#endif /* CONFIG_NET_POLL_CONTROLLER */ + +static int +vmxnet3_request_irqs(struct vmxnet3_adapter *adapter) +{ + struct vmxnet3_intr *intr = &adapter->intr; + int err = 0, i; + int vector = 0; + +#ifdef CONFIG_PCI_MSI + if (adapter->intr.type == VMXNET3_IT_MSIX) { + for (i = 0; i < adapter->num_tx_queues; i++) { + if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE) { + sprintf(adapter->tx_queue[i].name, "%s-tx-%d", + adapter->netdev->name, vector); + err = request_irq( + intr->msix_entries[vector].vector, + vmxnet3_msix_tx, 0, + adapter->tx_queue[i].name, + &adapter->tx_queue[i]); + } else { + sprintf(adapter->tx_queue[i].name, "%s-rxtx-%d", + adapter->netdev->name, vector); + } + if (err) { + dev_err(&adapter->netdev->dev, + "Failed to request irq for MSIX, %s, " + "error %d\n", + adapter->tx_queue[i].name, err); + return err; + } + + /* Handle the case where only 1 MSIx was allocated for + * all tx queues */ + if (adapter->share_intr == VMXNET3_INTR_TXSHARE) { + for (; i < adapter->num_tx_queues; i++) + adapter->tx_queue[i].comp_ring.intr_idx + = vector; + vector++; + break; + } else { + adapter->tx_queue[i].comp_ring.intr_idx + = vector++; + } + } + if (adapter->share_intr == VMXNET3_INTR_BUDDYSHARE) + vector = 0; + + for (i = 0; i < adapter->num_rx_queues; i++) { + if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE) + sprintf(adapter->rx_queue[i].name, "%s-rx-%d", + adapter->netdev->name, vector); + else + sprintf(adapter->rx_queue[i].name, "%s-rxtx-%d", + adapter->netdev->name, vector); + err = request_irq(intr->msix_entries[vector].vector, + vmxnet3_msix_rx, 0, + adapter->rx_queue[i].name, + &(adapter->rx_queue[i])); + if (err) { + netdev_err(adapter->netdev, + "Failed to request irq for MSIX, " + "%s, error %d\n", + adapter->rx_queue[i].name, err); + return err; + } + + adapter->rx_queue[i].comp_ring.intr_idx = vector++; + } + + sprintf(intr->event_msi_vector_name, "%s-event-%d", + adapter->netdev->name, vector); + err = request_irq(intr->msix_entries[vector].vector, + vmxnet3_msix_event, 0, + intr->event_msi_vector_name, adapter->netdev); + intr->event_intr_idx = vector; + + } else if (intr->type == VMXNET3_IT_MSI) { + adapter->num_rx_queues = 1; + err = request_irq(adapter->pdev->irq, vmxnet3_intr, 0, + adapter->netdev->name, adapter->netdev); + } else { +#endif + adapter->num_rx_queues = 1; + err = request_irq(adapter->pdev->irq, vmxnet3_intr, + IRQF_SHARED, adapter->netdev->name, + adapter->netdev); +#ifdef CONFIG_PCI_MSI + } +#endif + intr->num_intrs = vector + 1; + if (err) { + netdev_err(adapter->netdev, + "Failed to request irq (intr type:%d), error %d\n", + intr->type, err); + } else { + /* Number of rx queues will not change after this */ + for (i = 0; i < adapter->num_rx_queues; i++) { + struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i]; + rq->qid = i; + rq->qid2 = i + adapter->num_rx_queues; + } + + + + /* init our intr settings */ + for (i = 0; i < intr->num_intrs; i++) + intr->mod_levels[i] = UPT1_IML_ADAPTIVE; + if (adapter->intr.type != VMXNET3_IT_MSIX) { + adapter->intr.event_intr_idx = 0; + for (i = 0; i < adapter->num_tx_queues; i++) + adapter->tx_queue[i].comp_ring.intr_idx = 0; + adapter->rx_queue[0].comp_ring.intr_idx = 0; + } + + netdev_info(adapter->netdev, + "intr type %u, mode %u, %u vectors allocated\n", + intr->type, intr->mask_mode, intr->num_intrs); + } + + return err; +} + + +static void +vmxnet3_free_irqs(struct vmxnet3_adapter *adapter) +{ + struct vmxnet3_intr *intr = &adapter->intr; + BUG_ON(intr->type == VMXNET3_IT_AUTO || intr->num_intrs <= 0); + + switch (intr->type) { +#ifdef CONFIG_PCI_MSI + case VMXNET3_IT_MSIX: + { + int i, vector = 0; + + if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE) { + for (i = 0; i < adapter->num_tx_queues; i++) { + free_irq(intr->msix_entries[vector++].vector, + &(adapter->tx_queue[i])); + if (adapter->share_intr == VMXNET3_INTR_TXSHARE) + break; + } + } + + for (i = 0; i < adapter->num_rx_queues; i++) { + free_irq(intr->msix_entries[vector++].vector, + &(adapter->rx_queue[i])); + } + + free_irq(intr->msix_entries[vector].vector, + adapter->netdev); + BUG_ON(vector >= intr->num_intrs); + break; + } +#endif + case VMXNET3_IT_MSI: + free_irq(adapter->pdev->irq, adapter->netdev); + break; + case VMXNET3_IT_INTX: + free_irq(adapter->pdev->irq, adapter->netdev); + break; + default: + BUG(); + } +} + + +static void +vmxnet3_restore_vlan(struct vmxnet3_adapter *adapter) +{ + u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable; + u16 vid; + + /* allow untagged pkts */ + VMXNET3_SET_VFTABLE_ENTRY(vfTable, 0); + + for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID) + VMXNET3_SET_VFTABLE_ENTRY(vfTable, vid); +} + + +static int +vmxnet3_vlan_rx_add_vid(struct net_device *netdev, __be16 proto, u16 vid) +{ + struct vmxnet3_adapter *adapter = netdev_priv(netdev); + + if (!(netdev->flags & IFF_PROMISC)) { + u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable; + unsigned long flags; + + VMXNET3_SET_VFTABLE_ENTRY(vfTable, vid); + spin_lock_irqsave(&adapter->cmd_lock, flags); + VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, + VMXNET3_CMD_UPDATE_VLAN_FILTERS); + spin_unlock_irqrestore(&adapter->cmd_lock, flags); + } + + set_bit(vid, adapter->active_vlans); + + return 0; +} + + +static int +vmxnet3_vlan_rx_kill_vid(struct net_device *netdev, __be16 proto, u16 vid) +{ + struct vmxnet3_adapter *adapter = netdev_priv(netdev); + + if (!(netdev->flags & IFF_PROMISC)) { + u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable; + unsigned long flags; + + VMXNET3_CLEAR_VFTABLE_ENTRY(vfTable, vid); + spin_lock_irqsave(&adapter->cmd_lock, flags); + VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, + VMXNET3_CMD_UPDATE_VLAN_FILTERS); + spin_unlock_irqrestore(&adapter->cmd_lock, flags); + } + + clear_bit(vid, adapter->active_vlans); + + return 0; +} + + +static u8 * +vmxnet3_copy_mc(struct net_device *netdev) +{ + u8 *buf = NULL; + u32 sz = netdev_mc_count(netdev) * ETH_ALEN; + + /* struct Vmxnet3_RxFilterConf.mfTableLen is u16. */ + if (sz <= 0xffff) { + /* We may be called with BH disabled */ + buf = kmalloc(sz, GFP_ATOMIC); + if (buf) { + struct netdev_hw_addr *ha; + int i = 0; + + netdev_for_each_mc_addr(ha, netdev) + memcpy(buf + i++ * ETH_ALEN, ha->addr, + ETH_ALEN); + } + } + return buf; +} + + +static void +vmxnet3_set_mc(struct net_device *netdev) +{ + struct vmxnet3_adapter *adapter = netdev_priv(netdev); + unsigned long flags; + struct Vmxnet3_RxFilterConf *rxConf = + &adapter->shared->devRead.rxFilterConf; + u8 *new_table = NULL; + dma_addr_t new_table_pa = 0; + u32 new_mode = VMXNET3_RXM_UCAST; + + if (netdev->flags & IFF_PROMISC) { + u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable; + memset(vfTable, 0, VMXNET3_VFT_SIZE * sizeof(*vfTable)); + + new_mode |= VMXNET3_RXM_PROMISC; + } else { + vmxnet3_restore_vlan(adapter); + } + + if (netdev->flags & IFF_BROADCAST) + new_mode |= VMXNET3_RXM_BCAST; + + if (netdev->flags & IFF_ALLMULTI) + new_mode |= VMXNET3_RXM_ALL_MULTI; + else + if (!netdev_mc_empty(netdev)) { + new_table = vmxnet3_copy_mc(netdev); + if (new_table) { + rxConf->mfTableLen = cpu_to_le16( + netdev_mc_count(netdev) * ETH_ALEN); + new_table_pa = dma_map_single( + &adapter->pdev->dev, + new_table, + rxConf->mfTableLen, + PCI_DMA_TODEVICE); + } + + if (new_table_pa) { + new_mode |= VMXNET3_RXM_MCAST; + rxConf->mfTablePA = cpu_to_le64(new_table_pa); + } else { + netdev_info(netdev, + "failed to copy mcast list, setting ALL_MULTI\n"); + new_mode |= VMXNET3_RXM_ALL_MULTI; + } + } + + if (!(new_mode & VMXNET3_RXM_MCAST)) { + rxConf->mfTableLen = 0; + rxConf->mfTablePA = 0; + } + + spin_lock_irqsave(&adapter->cmd_lock, flags); + if (new_mode != rxConf->rxMode) { + rxConf->rxMode = cpu_to_le32(new_mode); + VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, + VMXNET3_CMD_UPDATE_RX_MODE); + VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, + VMXNET3_CMD_UPDATE_VLAN_FILTERS); + } + + VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, + VMXNET3_CMD_UPDATE_MAC_FILTERS); + spin_unlock_irqrestore(&adapter->cmd_lock, flags); + + if (new_table_pa) + dma_unmap_single(&adapter->pdev->dev, new_table_pa, + rxConf->mfTableLen, PCI_DMA_TODEVICE); + kfree(new_table); +} + +void +vmxnet3_rq_destroy_all(struct vmxnet3_adapter *adapter) +{ + int i; + + for (i = 0; i < adapter->num_rx_queues; i++) + vmxnet3_rq_destroy(&adapter->rx_queue[i], adapter); +} + + +/* + * Set up driver_shared based on settings in adapter. + */ + +static void +vmxnet3_setup_driver_shared(struct vmxnet3_adapter *adapter) +{ + struct Vmxnet3_DriverShared *shared = adapter->shared; + struct Vmxnet3_DSDevRead *devRead = &shared->devRead; + struct Vmxnet3_TxQueueConf *tqc; + struct Vmxnet3_RxQueueConf *rqc; + int i; + + memset(shared, 0, sizeof(*shared)); + + /* driver settings */ + shared->magic = cpu_to_le32(VMXNET3_REV1_MAGIC); + devRead->misc.driverInfo.version = cpu_to_le32( + VMXNET3_DRIVER_VERSION_NUM); + devRead->misc.driverInfo.gos.gosBits = (sizeof(void *) == 4 ? + VMXNET3_GOS_BITS_32 : VMXNET3_GOS_BITS_64); + devRead->misc.driverInfo.gos.gosType = VMXNET3_GOS_TYPE_LINUX; + *((u32 *)&devRead->misc.driverInfo.gos) = cpu_to_le32( + *((u32 *)&devRead->misc.driverInfo.gos)); + devRead->misc.driverInfo.vmxnet3RevSpt = cpu_to_le32(1); + devRead->misc.driverInfo.uptVerSpt = cpu_to_le32(1); + + devRead->misc.ddPA = cpu_to_le64(adapter->adapter_pa); + devRead->misc.ddLen = cpu_to_le32(sizeof(struct vmxnet3_adapter)); + + /* set up feature flags */ + if (adapter->netdev->features & NETIF_F_RXCSUM) + devRead->misc.uptFeatures |= UPT1_F_RXCSUM; + + if (adapter->netdev->features & NETIF_F_LRO) { + devRead->misc.uptFeatures |= UPT1_F_LRO; + devRead->misc.maxNumRxSG = cpu_to_le16(1 + MAX_SKB_FRAGS); + } + if (adapter->netdev->features & NETIF_F_HW_VLAN_CTAG_RX) + devRead->misc.uptFeatures |= UPT1_F_RXVLAN; + + devRead->misc.mtu = cpu_to_le32(adapter->netdev->mtu); + devRead->misc.queueDescPA = cpu_to_le64(adapter->queue_desc_pa); + devRead->misc.queueDescLen = cpu_to_le32( + adapter->num_tx_queues * sizeof(struct Vmxnet3_TxQueueDesc) + + adapter->num_rx_queues * sizeof(struct Vmxnet3_RxQueueDesc)); + + /* tx queue settings */ + devRead->misc.numTxQueues = adapter->num_tx_queues; + for (i = 0; i < adapter->num_tx_queues; i++) { + struct vmxnet3_tx_queue *tq = &adapter->tx_queue[i]; + BUG_ON(adapter->tx_queue[i].tx_ring.base == NULL); + tqc = &adapter->tqd_start[i].conf; + tqc->txRingBasePA = cpu_to_le64(tq->tx_ring.basePA); + tqc->dataRingBasePA = cpu_to_le64(tq->data_ring.basePA); + tqc->compRingBasePA = cpu_to_le64(tq->comp_ring.basePA); + tqc->ddPA = cpu_to_le64(tq->buf_info_pa); + tqc->txRingSize = cpu_to_le32(tq->tx_ring.size); + tqc->dataRingSize = cpu_to_le32(tq->data_ring.size); + tqc->compRingSize = cpu_to_le32(tq->comp_ring.size); + tqc->ddLen = cpu_to_le32( + sizeof(struct vmxnet3_tx_buf_info) * + tqc->txRingSize); + tqc->intrIdx = tq->comp_ring.intr_idx; + } + + /* rx queue settings */ + devRead->misc.numRxQueues = adapter->num_rx_queues; + for (i = 0; i < adapter->num_rx_queues; i++) { + struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i]; + rqc = &adapter->rqd_start[i].conf; + rqc->rxRingBasePA[0] = cpu_to_le64(rq->rx_ring[0].basePA); + rqc->rxRingBasePA[1] = cpu_to_le64(rq->rx_ring[1].basePA); + rqc->compRingBasePA = cpu_to_le64(rq->comp_ring.basePA); + rqc->ddPA = cpu_to_le64(rq->buf_info_pa); + rqc->rxRingSize[0] = cpu_to_le32(rq->rx_ring[0].size); + rqc->rxRingSize[1] = cpu_to_le32(rq->rx_ring[1].size); + rqc->compRingSize = cpu_to_le32(rq->comp_ring.size); + rqc->ddLen = cpu_to_le32( + sizeof(struct vmxnet3_rx_buf_info) * + (rqc->rxRingSize[0] + + rqc->rxRingSize[1])); + rqc->intrIdx = rq->comp_ring.intr_idx; + } + +#ifdef VMXNET3_RSS + memset(adapter->rss_conf, 0, sizeof(*adapter->rss_conf)); + + if (adapter->rss) { + struct UPT1_RSSConf *rssConf = adapter->rss_conf; + + devRead->misc.uptFeatures |= UPT1_F_RSS; + devRead->misc.numRxQueues = adapter->num_rx_queues; + rssConf->hashType = UPT1_RSS_HASH_TYPE_TCP_IPV4 | + UPT1_RSS_HASH_TYPE_IPV4 | + UPT1_RSS_HASH_TYPE_TCP_IPV6 | + UPT1_RSS_HASH_TYPE_IPV6; + rssConf->hashFunc = UPT1_RSS_HASH_FUNC_TOEPLITZ; + rssConf->hashKeySize = UPT1_RSS_MAX_KEY_SIZE; + rssConf->indTableSize = VMXNET3_RSS_IND_TABLE_SIZE; + netdev_rss_key_fill(rssConf->hashKey, sizeof(rssConf->hashKey)); + + for (i = 0; i < rssConf->indTableSize; i++) + rssConf->indTable[i] = ethtool_rxfh_indir_default( + i, adapter->num_rx_queues); + + devRead->rssConfDesc.confVer = 1; + devRead->rssConfDesc.confLen = cpu_to_le32(sizeof(*rssConf)); + devRead->rssConfDesc.confPA = + cpu_to_le64(adapter->rss_conf_pa); + } + +#endif /* VMXNET3_RSS */ + + /* intr settings */ + devRead->intrConf.autoMask = adapter->intr.mask_mode == + VMXNET3_IMM_AUTO; + devRead->intrConf.numIntrs = adapter->intr.num_intrs; + for (i = 0; i < adapter->intr.num_intrs; i++) + devRead->intrConf.modLevels[i] = adapter->intr.mod_levels[i]; + + devRead->intrConf.eventIntrIdx = adapter->intr.event_intr_idx; + devRead->intrConf.intrCtrl |= cpu_to_le32(VMXNET3_IC_DISABLE_ALL); + + /* rx filter settings */ + devRead->rxFilterConf.rxMode = 0; + vmxnet3_restore_vlan(adapter); + vmxnet3_write_mac_addr(adapter, adapter->netdev->dev_addr); + + /* the rest are already zeroed */ +} + + +int +vmxnet3_activate_dev(struct vmxnet3_adapter *adapter) +{ + int err, i; + u32 ret; + unsigned long flags; + + netdev_dbg(adapter->netdev, "%s: skb_buf_size %d, rx_buf_per_pkt %d," + " ring sizes %u %u %u\n", adapter->netdev->name, + adapter->skb_buf_size, adapter->rx_buf_per_pkt, + adapter->tx_queue[0].tx_ring.size, + adapter->rx_queue[0].rx_ring[0].size, + adapter->rx_queue[0].rx_ring[1].size); + + vmxnet3_tq_init_all(adapter); + err = vmxnet3_rq_init_all(adapter); + if (err) { + netdev_err(adapter->netdev, + "Failed to init rx queue error %d\n", err); + goto rq_err; + } + + err = vmxnet3_request_irqs(adapter); + if (err) { + netdev_err(adapter->netdev, + "Failed to setup irq for error %d\n", err); + goto irq_err; + } + + vmxnet3_setup_driver_shared(adapter); + + VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAL, VMXNET3_GET_ADDR_LO( + adapter->shared_pa)); + VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAH, VMXNET3_GET_ADDR_HI( + adapter->shared_pa)); + spin_lock_irqsave(&adapter->cmd_lock, flags); + VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, + VMXNET3_CMD_ACTIVATE_DEV); + ret = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD); + spin_unlock_irqrestore(&adapter->cmd_lock, flags); + + if (ret != 0) { + netdev_err(adapter->netdev, + "Failed to activate dev: error %u\n", ret); + err = -EINVAL; + goto activate_err; + } + + for (i = 0; i < adapter->num_rx_queues; i++) { + VMXNET3_WRITE_BAR0_REG(adapter, + VMXNET3_REG_RXPROD + i * VMXNET3_REG_ALIGN, + adapter->rx_queue[i].rx_ring[0].next2fill); + VMXNET3_WRITE_BAR0_REG(adapter, (VMXNET3_REG_RXPROD2 + + (i * VMXNET3_REG_ALIGN)), + adapter->rx_queue[i].rx_ring[1].next2fill); + } + + /* Apply the rx filter settins last. */ + vmxnet3_set_mc(adapter->netdev); + + /* + * Check link state when first activating device. It will start the + * tx queue if the link is up. + */ + vmxnet3_check_link(adapter, true); + for (i = 0; i < adapter->num_rx_queues; i++) + napi_enable(&adapter->rx_queue[i].napi); + vmxnet3_enable_all_intrs(adapter); + clear_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state); + return 0; + +activate_err: + VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAL, 0); + VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAH, 0); + vmxnet3_free_irqs(adapter); +irq_err: +rq_err: + /* free up buffers we allocated */ + vmxnet3_rq_cleanup_all(adapter); + return err; +} + + +void +vmxnet3_reset_dev(struct vmxnet3_adapter *adapter) +{ + unsigned long flags; + spin_lock_irqsave(&adapter->cmd_lock, flags); + VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_RESET_DEV); + spin_unlock_irqrestore(&adapter->cmd_lock, flags); +} + + +int +vmxnet3_quiesce_dev(struct vmxnet3_adapter *adapter) +{ + int i; + unsigned long flags; + if (test_and_set_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state)) + return 0; + + + spin_lock_irqsave(&adapter->cmd_lock, flags); + VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, + VMXNET3_CMD_QUIESCE_DEV); + spin_unlock_irqrestore(&adapter->cmd_lock, flags); + vmxnet3_disable_all_intrs(adapter); + + for (i = 0; i < adapter->num_rx_queues; i++) + napi_disable(&adapter->rx_queue[i].napi); + netif_tx_disable(adapter->netdev); + adapter->link_speed = 0; + netif_carrier_off(adapter->netdev); + + vmxnet3_tq_cleanup_all(adapter); + vmxnet3_rq_cleanup_all(adapter); + vmxnet3_free_irqs(adapter); + return 0; +} + + +static void +vmxnet3_write_mac_addr(struct vmxnet3_adapter *adapter, u8 *mac) +{ + u32 tmp; + + tmp = *(u32 *)mac; + VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_MACL, tmp); + + tmp = (mac[5] << 8) | mac[4]; + VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_MACH, tmp); +} + + +static int +vmxnet3_set_mac_addr(struct net_device *netdev, void *p) +{ + struct sockaddr *addr = p; + struct vmxnet3_adapter *adapter = netdev_priv(netdev); + + memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); + vmxnet3_write_mac_addr(adapter, addr->sa_data); + + return 0; +} + + +/* ==================== initialization and cleanup routines ============ */ + +static int +vmxnet3_alloc_pci_resources(struct vmxnet3_adapter *adapter, bool *dma64) +{ + int err; + unsigned long mmio_start, mmio_len; + struct pci_dev *pdev = adapter->pdev; + + err = pci_enable_device(pdev); + if (err) { + dev_err(&pdev->dev, "Failed to enable adapter: error %d\n", err); + return err; + } + + if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) == 0) { + if (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)) != 0) { + dev_err(&pdev->dev, + "pci_set_consistent_dma_mask failed\n"); + err = -EIO; + goto err_set_mask; + } + *dma64 = true; + } else { + if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) { + dev_err(&pdev->dev, + "pci_set_dma_mask failed\n"); + err = -EIO; + goto err_set_mask; + } + *dma64 = false; + } + + err = pci_request_selected_regions(pdev, (1 << 2) - 1, + vmxnet3_driver_name); + if (err) { + dev_err(&pdev->dev, + "Failed to request region for adapter: error %d\n", err); + goto err_set_mask; + } + + pci_set_master(pdev); + + mmio_start = pci_resource_start(pdev, 0); + mmio_len = pci_resource_len(pdev, 0); + adapter->hw_addr0 = ioremap(mmio_start, mmio_len); + if (!adapter->hw_addr0) { + dev_err(&pdev->dev, "Failed to map bar0\n"); + err = -EIO; + goto err_ioremap; + } + + mmio_start = pci_resource_start(pdev, 1); + mmio_len = pci_resource_len(pdev, 1); + adapter->hw_addr1 = ioremap(mmio_start, mmio_len); + if (!adapter->hw_addr1) { + dev_err(&pdev->dev, "Failed to map bar1\n"); + err = -EIO; + goto err_bar1; + } + return 0; + +err_bar1: + iounmap(adapter->hw_addr0); +err_ioremap: + pci_release_selected_regions(pdev, (1 << 2) - 1); +err_set_mask: + pci_disable_device(pdev); + return err; +} + + +static void +vmxnet3_free_pci_resources(struct vmxnet3_adapter *adapter) +{ + BUG_ON(!adapter->pdev); + + iounmap(adapter->hw_addr0); + iounmap(adapter->hw_addr1); + pci_release_selected_regions(adapter->pdev, (1 << 2) - 1); + pci_disable_device(adapter->pdev); +} + + +static void +vmxnet3_adjust_rx_ring_size(struct vmxnet3_adapter *adapter) +{ + size_t sz, i, ring0_size, ring1_size, comp_size; + struct vmxnet3_rx_queue *rq = &adapter->rx_queue[0]; + + + if (adapter->netdev->mtu <= VMXNET3_MAX_SKB_BUF_SIZE - + VMXNET3_MAX_ETH_HDR_SIZE) { + adapter->skb_buf_size = adapter->netdev->mtu + + VMXNET3_MAX_ETH_HDR_SIZE; + if (adapter->skb_buf_size < VMXNET3_MIN_T0_BUF_SIZE) + adapter->skb_buf_size = VMXNET3_MIN_T0_BUF_SIZE; + + adapter->rx_buf_per_pkt = 1; + } else { + adapter->skb_buf_size = VMXNET3_MAX_SKB_BUF_SIZE; + sz = adapter->netdev->mtu - VMXNET3_MAX_SKB_BUF_SIZE + + VMXNET3_MAX_ETH_HDR_SIZE; + adapter->rx_buf_per_pkt = 1 + (sz + PAGE_SIZE - 1) / PAGE_SIZE; + } + + /* + * for simplicity, force the ring0 size to be a multiple of + * rx_buf_per_pkt * VMXNET3_RING_SIZE_ALIGN + */ + sz = adapter->rx_buf_per_pkt * VMXNET3_RING_SIZE_ALIGN; + ring0_size = adapter->rx_queue[0].rx_ring[0].size; + ring0_size = (ring0_size + sz - 1) / sz * sz; + ring0_size = min_t(u32, ring0_size, VMXNET3_RX_RING_MAX_SIZE / + sz * sz); + ring1_size = adapter->rx_queue[0].rx_ring[1].size; + ring1_size = (ring1_size + sz - 1) / sz * sz; + ring1_size = min_t(u32, ring1_size, VMXNET3_RX_RING2_MAX_SIZE / + sz * sz); + comp_size = ring0_size + ring1_size; + + for (i = 0; i < adapter->num_rx_queues; i++) { + rq = &adapter->rx_queue[i]; + rq->rx_ring[0].size = ring0_size; + rq->rx_ring[1].size = ring1_size; + rq->comp_ring.size = comp_size; + } +} + + +int +vmxnet3_create_queues(struct vmxnet3_adapter *adapter, u32 tx_ring_size, + u32 rx_ring_size, u32 rx_ring2_size) +{ + int err = 0, i; + + for (i = 0; i < adapter->num_tx_queues; i++) { + struct vmxnet3_tx_queue *tq = &adapter->tx_queue[i]; + tq->tx_ring.size = tx_ring_size; + tq->data_ring.size = tx_ring_size; + tq->comp_ring.size = tx_ring_size; + tq->shared = &adapter->tqd_start[i].ctrl; + tq->stopped = true; + tq->adapter = adapter; + tq->qid = i; + err = vmxnet3_tq_create(tq, adapter); + /* + * Too late to change num_tx_queues. We cannot do away with + * lesser number of queues than what we asked for + */ + if (err) + goto queue_err; + } + + adapter->rx_queue[0].rx_ring[0].size = rx_ring_size; + adapter->rx_queue[0].rx_ring[1].size = rx_ring2_size; + vmxnet3_adjust_rx_ring_size(adapter); + for (i = 0; i < adapter->num_rx_queues; i++) { + struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i]; + /* qid and qid2 for rx queues will be assigned later when num + * of rx queues is finalized after allocating intrs */ + rq->shared = &adapter->rqd_start[i].ctrl; + rq->adapter = adapter; + err = vmxnet3_rq_create(rq, adapter); + if (err) { + if (i == 0) { + netdev_err(adapter->netdev, + "Could not allocate any rx queues. " + "Aborting.\n"); + goto queue_err; + } else { + netdev_info(adapter->netdev, + "Number of rx queues changed " + "to : %d.\n", i); + adapter->num_rx_queues = i; + err = 0; + break; + } + } + } + return err; +queue_err: + vmxnet3_tq_destroy_all(adapter); + return err; +} + +static int +vmxnet3_open(struct net_device *netdev) +{ + struct vmxnet3_adapter *adapter; + int err, i; + + adapter = netdev_priv(netdev); + + for (i = 0; i < adapter->num_tx_queues; i++) + spin_lock_init(&adapter->tx_queue[i].tx_lock); + + err = vmxnet3_create_queues(adapter, adapter->tx_ring_size, + adapter->rx_ring_size, + adapter->rx_ring2_size); + if (err) + goto queue_err; + + err = vmxnet3_activate_dev(adapter); + if (err) + goto activate_err; + + return 0; + +activate_err: + vmxnet3_rq_destroy_all(adapter); + vmxnet3_tq_destroy_all(adapter); +queue_err: + return err; +} + + +static int +vmxnet3_close(struct net_device *netdev) +{ + struct vmxnet3_adapter *adapter = netdev_priv(netdev); + + /* + * Reset_work may be in the middle of resetting the device, wait for its + * completion. + */ + while (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state)) + msleep(1); + + vmxnet3_quiesce_dev(adapter); + + vmxnet3_rq_destroy_all(adapter); + vmxnet3_tq_destroy_all(adapter); + + clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state); + + + return 0; +} + + +void +vmxnet3_force_close(struct vmxnet3_adapter *adapter) +{ + int i; + + /* + * we must clear VMXNET3_STATE_BIT_RESETTING, otherwise + * vmxnet3_close() will deadlock. + */ + BUG_ON(test_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state)); + + /* we need to enable NAPI, otherwise dev_close will deadlock */ + for (i = 0; i < adapter->num_rx_queues; i++) + napi_enable(&adapter->rx_queue[i].napi); + dev_close(adapter->netdev); +} + + +static int +vmxnet3_change_mtu(struct net_device *netdev, int new_mtu) +{ + struct vmxnet3_adapter *adapter = netdev_priv(netdev); + int err = 0; + + if (new_mtu < VMXNET3_MIN_MTU || new_mtu > VMXNET3_MAX_MTU) + return -EINVAL; + + netdev->mtu = new_mtu; + + /* + * Reset_work may be in the middle of resetting the device, wait for its + * completion. + */ + while (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state)) + msleep(1); + + if (netif_running(netdev)) { + vmxnet3_quiesce_dev(adapter); + vmxnet3_reset_dev(adapter); + + /* we need to re-create the rx queue based on the new mtu */ + vmxnet3_rq_destroy_all(adapter); + vmxnet3_adjust_rx_ring_size(adapter); + err = vmxnet3_rq_create_all(adapter); + if (err) { + netdev_err(netdev, + "failed to re-create rx queues, " + " error %d. Closing it.\n", err); + goto out; + } + + err = vmxnet3_activate_dev(adapter); + if (err) { + netdev_err(netdev, + "failed to re-activate, error %d. " + "Closing it\n", err); + goto out; + } + } + +out: + clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state); + if (err) + vmxnet3_force_close(adapter); + + return err; +} + + +static void +vmxnet3_declare_features(struct vmxnet3_adapter *adapter, bool dma64) +{ + struct net_device *netdev = adapter->netdev; + + netdev->hw_features = NETIF_F_SG | NETIF_F_RXCSUM | + NETIF_F_HW_CSUM | NETIF_F_HW_VLAN_CTAG_TX | + NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_TSO | NETIF_F_TSO6 | + NETIF_F_LRO; + if (dma64) + netdev->hw_features |= NETIF_F_HIGHDMA; + netdev->vlan_features = netdev->hw_features & + ~(NETIF_F_HW_VLAN_CTAG_TX | + NETIF_F_HW_VLAN_CTAG_RX); + netdev->features = netdev->hw_features | NETIF_F_HW_VLAN_CTAG_FILTER; +} + + +static void +vmxnet3_read_mac_addr(struct vmxnet3_adapter *adapter, u8 *mac) +{ + u32 tmp; + + tmp = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_MACL); + *(u32 *)mac = tmp; + + tmp = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_MACH); + mac[4] = tmp & 0xff; + mac[5] = (tmp >> 8) & 0xff; +} + +#ifdef CONFIG_PCI_MSI + +/* + * Enable MSIx vectors. + * Returns : + * VMXNET3_LINUX_MIN_MSIX_VECT when only minimum number of vectors required + * were enabled. + * number of vectors which were enabled otherwise (this number is greater + * than VMXNET3_LINUX_MIN_MSIX_VECT) + */ + +static int +vmxnet3_acquire_msix_vectors(struct vmxnet3_adapter *adapter, int nvec) +{ + int ret = pci_enable_msix_range(adapter->pdev, + adapter->intr.msix_entries, nvec, nvec); + + if (ret == -ENOSPC && nvec > VMXNET3_LINUX_MIN_MSIX_VECT) { + dev_err(&adapter->netdev->dev, + "Failed to enable %d MSI-X, trying %d\n", + nvec, VMXNET3_LINUX_MIN_MSIX_VECT); + + ret = pci_enable_msix_range(adapter->pdev, + adapter->intr.msix_entries, + VMXNET3_LINUX_MIN_MSIX_VECT, + VMXNET3_LINUX_MIN_MSIX_VECT); + } + + if (ret < 0) { + dev_err(&adapter->netdev->dev, + "Failed to enable MSI-X, error: %d\n", ret); + } + + return ret; +} + + +#endif /* CONFIG_PCI_MSI */ + +static void +vmxnet3_alloc_intr_resources(struct vmxnet3_adapter *adapter) +{ + u32 cfg; + unsigned long flags; + + /* intr settings */ + spin_lock_irqsave(&adapter->cmd_lock, flags); + VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, + VMXNET3_CMD_GET_CONF_INTR); + cfg = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD); + spin_unlock_irqrestore(&adapter->cmd_lock, flags); + adapter->intr.type = cfg & 0x3; + adapter->intr.mask_mode = (cfg >> 2) & 0x3; + + if (adapter->intr.type == VMXNET3_IT_AUTO) { + adapter->intr.type = VMXNET3_IT_MSIX; + } + +#ifdef CONFIG_PCI_MSI + if (adapter->intr.type == VMXNET3_IT_MSIX) { + int i, nvec; + + nvec = adapter->share_intr == VMXNET3_INTR_TXSHARE ? + 1 : adapter->num_tx_queues; + nvec += adapter->share_intr == VMXNET3_INTR_BUDDYSHARE ? + 0 : adapter->num_rx_queues; + nvec += 1; /* for link event */ + nvec = nvec > VMXNET3_LINUX_MIN_MSIX_VECT ? + nvec : VMXNET3_LINUX_MIN_MSIX_VECT; + + for (i = 0; i < nvec; i++) + adapter->intr.msix_entries[i].entry = i; + + nvec = vmxnet3_acquire_msix_vectors(adapter, nvec); + if (nvec < 0) + goto msix_err; + + /* If we cannot allocate one MSIx vector per queue + * then limit the number of rx queues to 1 + */ + if (nvec == VMXNET3_LINUX_MIN_MSIX_VECT) { + if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE + || adapter->num_rx_queues != 1) { + adapter->share_intr = VMXNET3_INTR_TXSHARE; + netdev_err(adapter->netdev, + "Number of rx queues : 1\n"); + adapter->num_rx_queues = 1; + } + } + + adapter->intr.num_intrs = nvec; + return; + +msix_err: + /* If we cannot allocate MSIx vectors use only one rx queue */ + dev_info(&adapter->pdev->dev, + "Failed to enable MSI-X, error %d. " + "Limiting #rx queues to 1, try MSI.\n", nvec); + + adapter->intr.type = VMXNET3_IT_MSI; + } + + if (adapter->intr.type == VMXNET3_IT_MSI) { + if (!pci_enable_msi(adapter->pdev)) { + adapter->num_rx_queues = 1; + adapter->intr.num_intrs = 1; + return; + } + } +#endif /* CONFIG_PCI_MSI */ + + adapter->num_rx_queues = 1; + dev_info(&adapter->netdev->dev, + "Using INTx interrupt, #Rx queues: 1.\n"); + adapter->intr.type = VMXNET3_IT_INTX; + + /* INT-X related setting */ + adapter->intr.num_intrs = 1; +} + + +static void +vmxnet3_free_intr_resources(struct vmxnet3_adapter *adapter) +{ + if (adapter->intr.type == VMXNET3_IT_MSIX) + pci_disable_msix(adapter->pdev); + else if (adapter->intr.type == VMXNET3_IT_MSI) + pci_disable_msi(adapter->pdev); + else + BUG_ON(adapter->intr.type != VMXNET3_IT_INTX); +} + + +static void +vmxnet3_tx_timeout(struct net_device *netdev) +{ + struct vmxnet3_adapter *adapter = netdev_priv(netdev); + adapter->tx_timeout_count++; + + netdev_err(adapter->netdev, "tx hang\n"); + schedule_work(&adapter->work); + netif_wake_queue(adapter->netdev); +} + + +static void +vmxnet3_reset_work(struct work_struct *data) +{ + struct vmxnet3_adapter *adapter; + + adapter = container_of(data, struct vmxnet3_adapter, work); + + /* if another thread is resetting the device, no need to proceed */ + if (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state)) + return; + + /* if the device is closed, we must leave it alone */ + rtnl_lock(); + if (netif_running(adapter->netdev)) { + netdev_notice(adapter->netdev, "resetting\n"); + vmxnet3_quiesce_dev(adapter); + vmxnet3_reset_dev(adapter); + vmxnet3_activate_dev(adapter); + } else { + netdev_info(adapter->netdev, "already closed\n"); + } + rtnl_unlock(); + + clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state); +} + + +static int +vmxnet3_probe_device(struct pci_dev *pdev, + const struct pci_device_id *id) +{ + static const struct net_device_ops vmxnet3_netdev_ops = { + .ndo_open = vmxnet3_open, + .ndo_stop = vmxnet3_close, + .ndo_start_xmit = vmxnet3_xmit_frame, + .ndo_set_mac_address = vmxnet3_set_mac_addr, + .ndo_change_mtu = vmxnet3_change_mtu, + .ndo_set_features = vmxnet3_set_features, + .ndo_get_stats64 = vmxnet3_get_stats64, + .ndo_tx_timeout = vmxnet3_tx_timeout, + .ndo_set_rx_mode = vmxnet3_set_mc, + .ndo_vlan_rx_add_vid = vmxnet3_vlan_rx_add_vid, + .ndo_vlan_rx_kill_vid = vmxnet3_vlan_rx_kill_vid, +#ifdef CONFIG_NET_POLL_CONTROLLER + .ndo_poll_controller = vmxnet3_netpoll, +#endif + }; + int err; + bool dma64 = false; /* stupid gcc */ + u32 ver; + struct net_device *netdev; + struct vmxnet3_adapter *adapter; + u8 mac[ETH_ALEN]; + int size; + int num_tx_queues; + int num_rx_queues; + + if (!pci_msi_enabled()) + enable_mq = 0; + +#ifdef VMXNET3_RSS + if (enable_mq) + num_rx_queues = min(VMXNET3_DEVICE_MAX_RX_QUEUES, + (int)num_online_cpus()); + else +#endif + num_rx_queues = 1; + num_rx_queues = rounddown_pow_of_two(num_rx_queues); + + if (enable_mq) + num_tx_queues = min(VMXNET3_DEVICE_MAX_TX_QUEUES, + (int)num_online_cpus()); + else + num_tx_queues = 1; + + num_tx_queues = rounddown_pow_of_two(num_tx_queues); + netdev = alloc_etherdev_mq(sizeof(struct vmxnet3_adapter), + max(num_tx_queues, num_rx_queues)); + dev_info(&pdev->dev, + "# of Tx queues : %d, # of Rx queues : %d\n", + num_tx_queues, num_rx_queues); + + if (!netdev) + return -ENOMEM; + + pci_set_drvdata(pdev, netdev); + adapter = netdev_priv(netdev); + adapter->netdev = netdev; + adapter->pdev = pdev; + + adapter->tx_ring_size = VMXNET3_DEF_TX_RING_SIZE; + adapter->rx_ring_size = VMXNET3_DEF_RX_RING_SIZE; + adapter->rx_ring2_size = VMXNET3_DEF_RX_RING2_SIZE; + + spin_lock_init(&adapter->cmd_lock); + adapter->adapter_pa = dma_map_single(&adapter->pdev->dev, adapter, + sizeof(struct vmxnet3_adapter), + PCI_DMA_TODEVICE); + adapter->shared = dma_alloc_coherent( + &adapter->pdev->dev, + sizeof(struct Vmxnet3_DriverShared), + &adapter->shared_pa, GFP_KERNEL); + if (!adapter->shared) { + dev_err(&pdev->dev, "Failed to allocate memory\n"); + err = -ENOMEM; + goto err_alloc_shared; + } + + adapter->num_rx_queues = num_rx_queues; + adapter->num_tx_queues = num_tx_queues; + adapter->rx_buf_per_pkt = 1; + + size = sizeof(struct Vmxnet3_TxQueueDesc) * adapter->num_tx_queues; + size += sizeof(struct Vmxnet3_RxQueueDesc) * adapter->num_rx_queues; + adapter->tqd_start = dma_alloc_coherent(&adapter->pdev->dev, size, + &adapter->queue_desc_pa, + GFP_KERNEL); + + if (!adapter->tqd_start) { + dev_err(&pdev->dev, "Failed to allocate memory\n"); + err = -ENOMEM; + goto err_alloc_queue_desc; + } + adapter->rqd_start = (struct Vmxnet3_RxQueueDesc *)(adapter->tqd_start + + adapter->num_tx_queues); + + adapter->pm_conf = dma_alloc_coherent(&adapter->pdev->dev, + sizeof(struct Vmxnet3_PMConf), + &adapter->pm_conf_pa, + GFP_KERNEL); + if (adapter->pm_conf == NULL) { + err = -ENOMEM; + goto err_alloc_pm; + } + +#ifdef VMXNET3_RSS + + adapter->rss_conf = dma_alloc_coherent(&adapter->pdev->dev, + sizeof(struct UPT1_RSSConf), + &adapter->rss_conf_pa, + GFP_KERNEL); + if (adapter->rss_conf == NULL) { + err = -ENOMEM; + goto err_alloc_rss; + } +#endif /* VMXNET3_RSS */ + + err = vmxnet3_alloc_pci_resources(adapter, &dma64); + if (err < 0) + goto err_alloc_pci; + + ver = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_VRRS); + if (ver & 1) { + VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_VRRS, 1); + } else { + dev_err(&pdev->dev, + "Incompatible h/w version (0x%x) for adapter\n", ver); + err = -EBUSY; + goto err_ver; + } + + ver = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_UVRS); + if (ver & 1) { + VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_UVRS, 1); + } else { + dev_err(&pdev->dev, + "Incompatible upt version (0x%x) for adapter\n", ver); + err = -EBUSY; + goto err_ver; + } + + SET_NETDEV_DEV(netdev, &pdev->dev); + vmxnet3_declare_features(adapter, dma64); + + if (adapter->num_tx_queues == adapter->num_rx_queues) + adapter->share_intr = VMXNET3_INTR_BUDDYSHARE; + else + adapter->share_intr = VMXNET3_INTR_DONTSHARE; + + vmxnet3_alloc_intr_resources(adapter); + +#ifdef VMXNET3_RSS + if (adapter->num_rx_queues > 1 && + adapter->intr.type == VMXNET3_IT_MSIX) { + adapter->rss = true; + netdev->hw_features |= NETIF_F_RXHASH; + netdev->features |= NETIF_F_RXHASH; + dev_dbg(&pdev->dev, "RSS is enabled.\n"); + } else { + adapter->rss = false; + } +#endif + + vmxnet3_read_mac_addr(adapter, mac); + memcpy(netdev->dev_addr, mac, netdev->addr_len); + + netdev->netdev_ops = &vmxnet3_netdev_ops; + vmxnet3_set_ethtool_ops(netdev); + netdev->watchdog_timeo = 5 * HZ; + + INIT_WORK(&adapter->work, vmxnet3_reset_work); + set_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state); + + if (adapter->intr.type == VMXNET3_IT_MSIX) { + int i; + for (i = 0; i < adapter->num_rx_queues; i++) { + netif_napi_add(adapter->netdev, + &adapter->rx_queue[i].napi, + vmxnet3_poll_rx_only, 64); + } + } else { + netif_napi_add(adapter->netdev, &adapter->rx_queue[0].napi, + vmxnet3_poll, 64); + } + + netif_set_real_num_tx_queues(adapter->netdev, adapter->num_tx_queues); + netif_set_real_num_rx_queues(adapter->netdev, adapter->num_rx_queues); + + netif_carrier_off(netdev); + err = register_netdev(netdev); + + if (err) { + dev_err(&pdev->dev, "Failed to register adapter\n"); + goto err_register; + } + + vmxnet3_check_link(adapter, false); + return 0; + +err_register: + vmxnet3_free_intr_resources(adapter); +err_ver: + vmxnet3_free_pci_resources(adapter); +err_alloc_pci: +#ifdef VMXNET3_RSS + dma_free_coherent(&adapter->pdev->dev, sizeof(struct UPT1_RSSConf), + adapter->rss_conf, adapter->rss_conf_pa); +err_alloc_rss: +#endif + dma_free_coherent(&adapter->pdev->dev, sizeof(struct Vmxnet3_PMConf), + adapter->pm_conf, adapter->pm_conf_pa); +err_alloc_pm: + dma_free_coherent(&adapter->pdev->dev, size, adapter->tqd_start, + adapter->queue_desc_pa); +err_alloc_queue_desc: + dma_free_coherent(&adapter->pdev->dev, + sizeof(struct Vmxnet3_DriverShared), + adapter->shared, adapter->shared_pa); +err_alloc_shared: + dma_unmap_single(&adapter->pdev->dev, adapter->adapter_pa, + sizeof(struct vmxnet3_adapter), PCI_DMA_TODEVICE); + free_netdev(netdev); + return err; +} + + +static void +vmxnet3_remove_device(struct pci_dev *pdev) +{ + struct net_device *netdev = pci_get_drvdata(pdev); + struct vmxnet3_adapter *adapter = netdev_priv(netdev); + int size = 0; + int num_rx_queues; + +#ifdef VMXNET3_RSS + if (enable_mq) + num_rx_queues = min(VMXNET3_DEVICE_MAX_RX_QUEUES, + (int)num_online_cpus()); + else +#endif + num_rx_queues = 1; + num_rx_queues = rounddown_pow_of_two(num_rx_queues); + + cancel_work_sync(&adapter->work); + + unregister_netdev(netdev); + + vmxnet3_free_intr_resources(adapter); + vmxnet3_free_pci_resources(adapter); +#ifdef VMXNET3_RSS + dma_free_coherent(&adapter->pdev->dev, sizeof(struct UPT1_RSSConf), + adapter->rss_conf, adapter->rss_conf_pa); +#endif + dma_free_coherent(&adapter->pdev->dev, sizeof(struct Vmxnet3_PMConf), + adapter->pm_conf, adapter->pm_conf_pa); + + size = sizeof(struct Vmxnet3_TxQueueDesc) * adapter->num_tx_queues; + size += sizeof(struct Vmxnet3_RxQueueDesc) * num_rx_queues; + dma_free_coherent(&adapter->pdev->dev, size, adapter->tqd_start, + adapter->queue_desc_pa); + dma_free_coherent(&adapter->pdev->dev, + sizeof(struct Vmxnet3_DriverShared), + adapter->shared, adapter->shared_pa); + dma_unmap_single(&adapter->pdev->dev, adapter->adapter_pa, + sizeof(struct vmxnet3_adapter), PCI_DMA_TODEVICE); + free_netdev(netdev); +} + + +#ifdef CONFIG_PM + +static int +vmxnet3_suspend(struct device *device) +{ + struct pci_dev *pdev = to_pci_dev(device); + struct net_device *netdev = pci_get_drvdata(pdev); + struct vmxnet3_adapter *adapter = netdev_priv(netdev); + struct Vmxnet3_PMConf *pmConf; + struct ethhdr *ehdr; + struct arphdr *ahdr; + u8 *arpreq; + struct in_device *in_dev; + struct in_ifaddr *ifa; + unsigned long flags; + int i = 0; + + if (!netif_running(netdev)) + return 0; + + for (i = 0; i < adapter->num_rx_queues; i++) + napi_disable(&adapter->rx_queue[i].napi); + + vmxnet3_disable_all_intrs(adapter); + vmxnet3_free_irqs(adapter); + vmxnet3_free_intr_resources(adapter); + + netif_device_detach(netdev); + netif_tx_stop_all_queues(netdev); + + /* Create wake-up filters. */ + pmConf = adapter->pm_conf; + memset(pmConf, 0, sizeof(*pmConf)); + + if (adapter->wol & WAKE_UCAST) { + pmConf->filters[i].patternSize = ETH_ALEN; + pmConf->filters[i].maskSize = 1; + memcpy(pmConf->filters[i].pattern, netdev->dev_addr, ETH_ALEN); + pmConf->filters[i].mask[0] = 0x3F; /* LSB ETH_ALEN bits */ + + pmConf->wakeUpEvents |= VMXNET3_PM_WAKEUP_FILTER; + i++; + } + + if (adapter->wol & WAKE_ARP) { + in_dev = in_dev_get(netdev); + if (!in_dev) + goto skip_arp; + + ifa = (struct in_ifaddr *)in_dev->ifa_list; + if (!ifa) + goto skip_arp; + + pmConf->filters[i].patternSize = ETH_HLEN + /* Ethernet header*/ + sizeof(struct arphdr) + /* ARP header */ + 2 * ETH_ALEN + /* 2 Ethernet addresses*/ + 2 * sizeof(u32); /*2 IPv4 addresses */ + pmConf->filters[i].maskSize = + (pmConf->filters[i].patternSize - 1) / 8 + 1; + + /* ETH_P_ARP in Ethernet header. */ + ehdr = (struct ethhdr *)pmConf->filters[i].pattern; + ehdr->h_proto = htons(ETH_P_ARP); + + /* ARPOP_REQUEST in ARP header. */ + ahdr = (struct arphdr *)&pmConf->filters[i].pattern[ETH_HLEN]; + ahdr->ar_op = htons(ARPOP_REQUEST); + arpreq = (u8 *)(ahdr + 1); + + /* The Unicast IPv4 address in 'tip' field. */ + arpreq += 2 * ETH_ALEN + sizeof(u32); + *(u32 *)arpreq = ifa->ifa_address; + + /* The mask for the relevant bits. */ + pmConf->filters[i].mask[0] = 0x00; + pmConf->filters[i].mask[1] = 0x30; /* ETH_P_ARP */ + pmConf->filters[i].mask[2] = 0x30; /* ARPOP_REQUEST */ + pmConf->filters[i].mask[3] = 0x00; + pmConf->filters[i].mask[4] = 0xC0; /* IPv4 TIP */ + pmConf->filters[i].mask[5] = 0x03; /* IPv4 TIP */ + in_dev_put(in_dev); + + pmConf->wakeUpEvents |= VMXNET3_PM_WAKEUP_FILTER; + i++; + } + +skip_arp: + if (adapter->wol & WAKE_MAGIC) + pmConf->wakeUpEvents |= VMXNET3_PM_WAKEUP_MAGIC; + + pmConf->numFilters = i; + + adapter->shared->devRead.pmConfDesc.confVer = cpu_to_le32(1); + adapter->shared->devRead.pmConfDesc.confLen = cpu_to_le32(sizeof( + *pmConf)); + adapter->shared->devRead.pmConfDesc.confPA = + cpu_to_le64(adapter->pm_conf_pa); + + spin_lock_irqsave(&adapter->cmd_lock, flags); + VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, + VMXNET3_CMD_UPDATE_PMCFG); + spin_unlock_irqrestore(&adapter->cmd_lock, flags); + + pci_save_state(pdev); + pci_enable_wake(pdev, pci_choose_state(pdev, PMSG_SUSPEND), + adapter->wol); + pci_disable_device(pdev); + pci_set_power_state(pdev, pci_choose_state(pdev, PMSG_SUSPEND)); + + return 0; +} + + +static int +vmxnet3_resume(struct device *device) +{ + int err; + unsigned long flags; + struct pci_dev *pdev = to_pci_dev(device); + struct net_device *netdev = pci_get_drvdata(pdev); + struct vmxnet3_adapter *adapter = netdev_priv(netdev); + + if (!netif_running(netdev)) + return 0; + + pci_set_power_state(pdev, PCI_D0); + pci_restore_state(pdev); + err = pci_enable_device_mem(pdev); + if (err != 0) + return err; + + pci_enable_wake(pdev, PCI_D0, 0); + + vmxnet3_alloc_intr_resources(adapter); + + /* During hibernate and suspend, device has to be reinitialized as the + * device state need not be preserved. + */ + + /* Need not check adapter state as other reset tasks cannot run during + * device resume. + */ + spin_lock_irqsave(&adapter->cmd_lock, flags); + VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, + VMXNET3_CMD_QUIESCE_DEV); + spin_unlock_irqrestore(&adapter->cmd_lock, flags); + vmxnet3_tq_cleanup_all(adapter); + vmxnet3_rq_cleanup_all(adapter); + + vmxnet3_reset_dev(adapter); + err = vmxnet3_activate_dev(adapter); + if (err != 0) { + netdev_err(netdev, + "failed to re-activate on resume, error: %d", err); + vmxnet3_force_close(adapter); + return err; + } + netif_device_attach(netdev); + + return 0; +} + +static const struct dev_pm_ops vmxnet3_pm_ops = { + .suspend = vmxnet3_suspend, + .resume = vmxnet3_resume, + .freeze = vmxnet3_suspend, + .restore = vmxnet3_resume, +}; +#endif + +static struct pci_driver vmxnet3_driver = { + .name = vmxnet3_driver_name, + .id_table = vmxnet3_pciid_table, + .probe = vmxnet3_probe_device, + .remove = vmxnet3_remove_device, +#ifdef CONFIG_PM + .driver.pm = &vmxnet3_pm_ops, +#endif +}; + + +static int __init +vmxnet3_init_module(void) +{ + pr_info("%s - version %s\n", VMXNET3_DRIVER_DESC, + VMXNET3_DRIVER_VERSION_REPORT); + return pci_register_driver(&vmxnet3_driver); +} + +module_init(vmxnet3_init_module); + + +static void +vmxnet3_exit_module(void) +{ + pci_unregister_driver(&vmxnet3_driver); +} + +module_exit(vmxnet3_exit_module); + +MODULE_AUTHOR("VMware, Inc."); +MODULE_DESCRIPTION(VMXNET3_DRIVER_DESC); +MODULE_LICENSE("GPL v2"); +MODULE_VERSION(VMXNET3_DRIVER_VERSION_STRING); |