From patchwork Wed Aug 10 08:55:27 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jiawen Wu X-Patchwork-Id: 12940378 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 91836C25B06 for ; Wed, 10 Aug 2022 08:58:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231844AbiHJI6Z (ORCPT ); Wed, 10 Aug 2022 04:58:25 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53688 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231861AbiHJI56 (ORCPT ); Wed, 10 Aug 2022 04:57:58 -0400 Received: from smtpbgeu2.qq.com (smtpbgeu2.qq.com [18.194.254.142]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E7FFB6E8AC for ; Wed, 10 Aug 2022 01:57:52 -0700 (PDT) X-QQ-mid: bizesmtp82t1660121804tz52nvpf Received: from wxdbg.localdomain.com ( [183.129.236.74]) by bizesmtp.qq.com (ESMTP) with id ; Wed, 10 Aug 2022 16:56:43 +0800 (CST) X-QQ-SSF: 01400000000000G0S000B00A0000000 X-QQ-FEAT: znfcQSa1hKZM/58imM7esN9dDFKjq3mNwO4hn70DFRMokADeavE535AeEwwBp dcEJmAG4vHHVOiYOe+HOdM1fzb/IXHCDAyqPS0qhmUk4h+w9QJGko6PFuk8VBj1q7umV4aW I4RHgxHqQTjmyStRl6UE4rpYEYQ8M2gFwX3ZoYBTLB28XLBDVfXQ+XlOmVb1pywNNS/9aH4 S5YhoPv2rQ9rIgDPBowrthdTHyQHqvtO5idcHXb/5xdZ6D801A3VBBs7vq2TsC2qDRtbkt8 tVBPeBT+7YVTiMOvgEmlGkgzTcK8w48RLeBCZM/e/VhEqx4R4F+3UjLMN4V9FHvDBjTt2k5 7RUe2wzfMt6fISWWdxDYpxNCy0vZF1IVpqktrjqSBjuurTWPQgvg8/ow5Mdup/J+8M4dRUW AynbdMCN9/oTZSKlFsPkvA== X-QQ-GoodBg: 2 From: Jiawen Wu To: netdev@vger.kernel.org Cc: Jiawen Wu Subject: [RFC PATCH net-next 11/16] net: txgbe: Allocate Rx and Tx resources Date: Wed, 10 Aug 2022 16:55:27 +0800 Message-Id: <20220810085532.246613-12-jiawenwu@trustnetic.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20220810085532.246613-1-jiawenwu@trustnetic.com> References: <20220810085532.246613-1-jiawenwu@trustnetic.com> MIME-Version: 1.0 X-QQ-SENDSIZE: 520 Feedback-ID: bizesmtp:trustnetic.com:qybglogicsvr:qybglogicsvr5 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org X-Patchwork-State: RFC Allocate receive and transmit descriptors for all queues. Signed-off-by: Jiawen Wu --- drivers/net/ethernet/wangxun/txgbe/txgbe.h | 64 +++ .../net/ethernet/wangxun/txgbe/txgbe_lib.c | 9 + .../net/ethernet/wangxun/txgbe/txgbe_main.c | 498 +++++++++++++++++- .../net/ethernet/wangxun/txgbe/txgbe_type.h | 45 ++ 4 files changed, 615 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/wangxun/txgbe/txgbe.h b/drivers/net/ethernet/wangxun/txgbe/txgbe.h index 516b4f865e6d..d3db6f1aabc5 100644 --- a/drivers/net/ethernet/wangxun/txgbe/txgbe.h +++ b/drivers/net/ethernet/wangxun/txgbe/txgbe.h @@ -12,9 +12,19 @@ #include "txgbe_type.h" /* TX/RX descriptor defines */ +#define TXGBE_DEFAULT_TXD 512 +#define TXGBE_DEFAULT_TX_WORK 256 #define TXGBE_MAX_TXD 8192 #define TXGBE_MIN_TXD 128 +#if (PAGE_SIZE < 8192) +#define TXGBE_DEFAULT_RXD 512 +#define TXGBE_DEFAULT_RX_WORK 256 +#else +#define TXGBE_DEFAULT_RXD 256 +#define TXGBE_DEFAULT_RX_WORK 128 +#endif + #define TXGBE_MAX_RXD 8192 #define TXGBE_MIN_RXD 128 @@ -36,13 +46,36 @@ #define TXGBE_MAX_RX_DESC_POLL 10 +/* wrapper around a pointer to a socket buffer, + * so a DMA handle can be stored along with the buffer + */ +struct txgbe_tx_buffer { + union txgbe_tx_desc *next_to_watch; + struct sk_buff *skb; + DEFINE_DMA_UNMAP_ADDR(dma); + DEFINE_DMA_UNMAP_LEN(len); +}; + +struct txgbe_rx_buffer { + struct sk_buff *skb; + dma_addr_t dma; + dma_addr_t page_dma; + struct page *page; +}; + struct txgbe_ring { struct txgbe_ring *next; /* pointer to next ring in q_vector */ struct txgbe_q_vector *q_vector; /* backpointer to host q_vector */ struct net_device *netdev; /* netdev ring belongs to */ struct device *dev; /* device for DMA mapping */ + void *desc; /* descriptor ring memory */ + union { + struct txgbe_tx_buffer *tx_buffer_info; + struct txgbe_rx_buffer *rx_buffer_info; + }; u8 __iomem *tail; dma_addr_t dma; /* phys. address of descriptor ring */ + unsigned int size; /* length in bytes */ u16 count; /* amount of descriptors */ @@ -50,6 +83,7 @@ struct txgbe_ring { u8 reg_idx; u16 next_to_use; u16 next_to_clean; + u16 rx_buf_len; u16 next_to_alloc; } ____cacheline_internodealigned_in_smp; @@ -69,6 +103,13 @@ static inline unsigned int txgbe_rx_bufsz(struct txgbe_ring __maybe_unused *ring #endif } +static inline unsigned int txgbe_rx_pg_order(struct txgbe_ring __maybe_unused *ring) +{ + return 0; +} + +#define txgbe_rx_pg_size(_ring) (PAGE_SIZE << txgbe_rx_pg_order(_ring)) + struct txgbe_ring_container { struct txgbe_ring *ring; /* pointer to linked list of rings */ u16 work_limit; /* total work allowed per interrupt */ @@ -178,10 +219,12 @@ struct txgbe_adapter { /* Tx fast path data */ int num_tx_queues; u16 tx_itr_setting; + u16 tx_work_limit; /* Rx fast path data */ int num_rx_queues; u16 rx_itr_setting; + u16 rx_work_limit; /* TX */ struct txgbe_ring *tx_ring[TXGBE_MAX_TX_QUEUES] ____cacheline_aligned_in_smp; @@ -249,6 +292,15 @@ enum txgbe_state_t { __TXGBE_IN_SFP_INIT, }; +struct txgbe_cb { + dma_addr_t dma; + u16 append_cnt; /* number of skb's appended */ + bool page_released; + bool dma_released; +}; + +#define TXGBE_CB(skb) ((struct txgbe_cb *)(skb)->cb) + /* needed by txgbe_main.c */ void txgbe_service_event_schedule(struct txgbe_adapter *adapter); void txgbe_assign_netdev_ops(struct net_device *netdev); @@ -263,6 +315,10 @@ void txgbe_reinit_locked(struct txgbe_adapter *adapter); void txgbe_reset(struct txgbe_adapter *adapter); s32 txgbe_init_shared_code(struct txgbe_hw *hw); void txgbe_disable_device(struct txgbe_adapter *adapter); +int txgbe_setup_rx_resources(struct txgbe_ring *rx_ring); +int txgbe_setup_tx_resources(struct txgbe_ring *tx_ring); +void txgbe_free_rx_resources(struct txgbe_ring *rx_ring); +void txgbe_free_tx_resources(struct txgbe_ring *tx_ring); void txgbe_configure_rx_ring(struct txgbe_adapter *adapter, struct txgbe_ring *ring); void txgbe_configure_tx_ring(struct txgbe_adapter *adapter, @@ -271,13 +327,21 @@ int txgbe_init_interrupt_scheme(struct txgbe_adapter *adapter); void txgbe_reset_interrupt_capability(struct txgbe_adapter *adapter); void txgbe_set_interrupt_capability(struct txgbe_adapter *adapter); void txgbe_clear_interrupt_scheme(struct txgbe_adapter *adapter); +void txgbe_unmap_and_free_tx_resource(struct txgbe_ring *ring, + struct txgbe_tx_buffer *tx_buffer); void txgbe_configure_port(struct txgbe_adapter *adapter); void txgbe_set_rx_mode(struct net_device *netdev); int txgbe_write_mc_addr_list(struct net_device *netdev); void txgbe_write_eitr(struct txgbe_q_vector *q_vector); +int txgbe_poll(struct napi_struct *napi, int budget); void txgbe_disable_rx_queue(struct txgbe_adapter *adapter, struct txgbe_ring *ring); +static inline struct netdev_queue *txring_txq(const struct txgbe_ring *ring) +{ + return netdev_get_tx_queue(ring->netdev, ring->queue_index); +} + int txgbe_write_uc_addr_list(struct net_device *netdev, int pool); int txgbe_add_mac_filter(struct txgbe_adapter *adapter, u8 *addr, u16 pool); int txgbe_del_mac_filter(struct txgbe_adapter *adapter, u8 *addr, u16 pool); diff --git a/drivers/net/ethernet/wangxun/txgbe/txgbe_lib.c b/drivers/net/ethernet/wangxun/txgbe/txgbe_lib.c index e7b6316e3b56..84b7e01cc27e 100644 --- a/drivers/net/ethernet/wangxun/txgbe/txgbe_lib.c +++ b/drivers/net/ethernet/wangxun/txgbe/txgbe_lib.c @@ -166,11 +166,19 @@ static int txgbe_alloc_q_vector(struct txgbe_adapter *adapter, /* initialize CPU for DCA */ q_vector->cpu = -1; + /* initialize NAPI */ + netif_napi_add(adapter->netdev, &q_vector->napi, + txgbe_poll, 64); + /* tie q_vector and adapter together */ adapter->q_vector[v_idx] = q_vector; q_vector->adapter = adapter; q_vector->v_idx = v_idx; + /* initialize work limits */ + q_vector->tx.work_limit = adapter->tx_work_limit; + q_vector->rx.work_limit = adapter->rx_work_limit; + /* initialize pointer to rings */ ring = q_vector->ring; @@ -265,6 +273,7 @@ static void txgbe_free_q_vector(struct txgbe_adapter *adapter, int v_idx) adapter->rx_ring[ring->queue_index] = NULL; adapter->q_vector[v_idx] = NULL; + netif_napi_del(&q_vector->napi); kfree_rcu(q_vector, rcu); } diff --git a/drivers/net/ethernet/wangxun/txgbe/txgbe_main.c b/drivers/net/ethernet/wangxun/txgbe/txgbe_main.c index 8f6946379c79..c66ad524750b 100644 --- a/drivers/net/ethernet/wangxun/txgbe/txgbe_main.c +++ b/drivers/net/ethernet/wangxun/txgbe/txgbe_main.c @@ -41,6 +41,10 @@ static const struct pci_device_id txgbe_pci_tbl[] = { static struct workqueue_struct *txgbe_wq; static bool txgbe_is_sfp(struct txgbe_hw *hw); +static void txgbe_clean_rx_ring(struct txgbe_ring *rx_ring); +static void txgbe_clean_tx_ring(struct txgbe_ring *tx_ring); +static void txgbe_napi_enable_all(struct txgbe_adapter *adapter); +static void txgbe_napi_disable_all(struct txgbe_adapter *adapter); static void txgbe_check_minimum_link(struct txgbe_adapter *adapter) { @@ -178,6 +182,28 @@ static void txgbe_set_ivar(struct txgbe_adapter *adapter, s8 direction, } } +void txgbe_unmap_and_free_tx_resource(struct txgbe_ring *ring, + struct txgbe_tx_buffer *tx_buffer) +{ + if (tx_buffer->skb) { + dev_kfree_skb_any(tx_buffer->skb); + if (dma_unmap_len(tx_buffer, len)) + dma_unmap_single(ring->dev, + dma_unmap_addr(tx_buffer, dma), + dma_unmap_len(tx_buffer, len), + DMA_TO_DEVICE); + } else if (dma_unmap_len(tx_buffer, len)) { + dma_unmap_page(ring->dev, + dma_unmap_addr(tx_buffer, dma), + dma_unmap_len(tx_buffer, len), + DMA_TO_DEVICE); + } + tx_buffer->next_to_watch = NULL; + tx_buffer->skb = NULL; + dma_unmap_len_set(tx_buffer, len, 0); + /* tx_buffer must be completely set up in the transmit path */ +} + /** * txgbe_configure_msix - Configure MSI-X hardware * @adapter: board private structure @@ -438,6 +464,18 @@ static irqreturn_t txgbe_msix_clean_rings(int __always_unused irq, void *data) return IRQ_HANDLED; } +/** + * txgbe_poll - NAPI polling RX/TX cleanup routine + * @napi: napi struct with our devices info in it + * @budget: amount of work driver is allowed to do this pass, in packets + * + * This function will clean all queues associated with a q_vector. + **/ +int txgbe_poll(struct napi_struct *napi, int budget) +{ + return 0; +} + /** * txgbe_request_msix_irqs - Initialize MSI-X interrupts * @adapter: board private structure @@ -1279,6 +1317,28 @@ void txgbe_set_rx_mode(struct net_device *netdev) wr32(hw, TXGBE_PSR_VM_L2CTL(0), vmolr); } +static void txgbe_napi_enable_all(struct txgbe_adapter *adapter) +{ + struct txgbe_q_vector *q_vector; + int q_idx; + + for (q_idx = 0; q_idx < adapter->num_q_vectors; q_idx++) { + q_vector = adapter->q_vector[q_idx]; + napi_enable(&q_vector->napi); + } +} + +static void txgbe_napi_disable_all(struct txgbe_adapter *adapter) +{ + struct txgbe_q_vector *q_vector; + int q_idx; + + for (q_idx = 0; q_idx < adapter->num_q_vectors; q_idx++) { + q_vector = adapter->q_vector[q_idx]; + napi_disable(&q_vector->napi); + } +} + static void txgbe_configure_pb(struct txgbe_adapter *adapter) { struct txgbe_hw *hw = &adapter->hw; @@ -1403,6 +1463,7 @@ static void txgbe_up_complete(struct txgbe_adapter *adapter) /* make sure to complete pre-operations */ smp_mb__before_atomic(); clear_bit(__TXGBE_DOWN, &adapter->state); + txgbe_napi_enable_all(adapter); if (txgbe_is_sfp(hw)) { txgbe_sfp_link_config(adapter); @@ -1434,6 +1495,9 @@ static void txgbe_up_complete(struct txgbe_adapter *adapter) wr32(hw, TXGBE_GPIO_EOI, TXGBE_GPIO_EOI_6); txgbe_irq_enable(adapter, true, true); + /* enable transmits */ + netif_tx_start_all_queues(adapter->netdev); + /* bring the link up in the watchdog, this could race with our first * link up interrupt but shouldn't be a problem */ @@ -1507,6 +1571,129 @@ void txgbe_reset(struct txgbe_adapter *adapter) TCALL(hw, mac.ops.set_vmdq_san_mac, 0); } +/** + * txgbe_clean_rx_ring - Free Rx Buffers per Queue + * @rx_ring: ring to free buffers from + **/ +static void txgbe_clean_rx_ring(struct txgbe_ring *rx_ring) +{ + struct device *dev = rx_ring->dev; + unsigned long size; + u16 i; + + /* ring already cleared, nothing to do */ + if (!rx_ring->rx_buffer_info) + return; + + /* Free all the Rx ring sk_buffs */ + for (i = 0; i < rx_ring->count; i++) { + struct txgbe_rx_buffer *rx_buffer = &rx_ring->rx_buffer_info[i]; + + if (rx_buffer->dma) { + dma_unmap_single(dev, + rx_buffer->dma, + rx_ring->rx_buf_len, + DMA_FROM_DEVICE); + rx_buffer->dma = 0; + } + + if (rx_buffer->skb) { + struct sk_buff *skb = rx_buffer->skb; + + if (TXGBE_CB(skb)->dma_released) { + dma_unmap_single(dev, + TXGBE_CB(skb)->dma, + rx_ring->rx_buf_len, + DMA_FROM_DEVICE); + TXGBE_CB(skb)->dma = 0; + TXGBE_CB(skb)->dma_released = false; + } + + if (TXGBE_CB(skb)->page_released) + dma_unmap_page(dev, + TXGBE_CB(skb)->dma, + txgbe_rx_bufsz(rx_ring), + DMA_FROM_DEVICE); + dev_kfree_skb(skb); + rx_buffer->skb = NULL; + } + + if (!rx_buffer->page) + continue; + + dma_unmap_page(dev, rx_buffer->page_dma, + txgbe_rx_pg_size(rx_ring), + DMA_FROM_DEVICE); + + __free_pages(rx_buffer->page, + txgbe_rx_pg_order(rx_ring)); + rx_buffer->page = NULL; + } + + size = sizeof(struct txgbe_rx_buffer) * rx_ring->count; + memset(rx_ring->rx_buffer_info, 0, size); + + /* Zero out the descriptor ring */ + memset(rx_ring->desc, 0, rx_ring->size); + + rx_ring->next_to_alloc = 0; + rx_ring->next_to_clean = 0; + rx_ring->next_to_use = 0; +} + +/** + * txgbe_clean_tx_ring - Free Tx Buffers + * @tx_ring: ring to be cleaned + **/ +static void txgbe_clean_tx_ring(struct txgbe_ring *tx_ring) +{ + struct txgbe_tx_buffer *tx_buffer_info; + unsigned long size; + u16 i; + + /* ring already cleared, nothing to do */ + if (!tx_ring->tx_buffer_info) + return; + + /* Free all the Tx ring sk_buffs */ + for (i = 0; i < tx_ring->count; i++) { + tx_buffer_info = &tx_ring->tx_buffer_info[i]; + txgbe_unmap_and_free_tx_resource(tx_ring, tx_buffer_info); + } + + netdev_tx_reset_queue(txring_txq(tx_ring)); + + size = sizeof(struct txgbe_tx_buffer) * tx_ring->count; + memset(tx_ring->tx_buffer_info, 0, size); + + /* Zero out the descriptor ring */ + memset(tx_ring->desc, 0, tx_ring->size); +} + +/** + * txgbe_clean_all_rx_rings - Free Rx Buffers for all queues + * @adapter: board private structure + **/ +static void txgbe_clean_all_rx_rings(struct txgbe_adapter *adapter) +{ + int i; + + for (i = 0; i < adapter->num_rx_queues; i++) + txgbe_clean_rx_ring(adapter->rx_ring[i]); +} + +/** + * txgbe_clean_all_tx_rings - Free Tx Buffers for all queues + * @adapter: board private structure + **/ +static void txgbe_clean_all_tx_rings(struct txgbe_adapter *adapter) +{ + int i; + + for (i = 0; i < adapter->num_tx_queues; i++) + txgbe_clean_tx_ring(adapter->tx_ring[i]); +} + void txgbe_disable_device(struct txgbe_adapter *adapter) { struct net_device *netdev = adapter->netdev; @@ -1526,11 +1713,15 @@ void txgbe_disable_device(struct txgbe_adapter *adapter) /* this call also flushes the previous write */ txgbe_disable_rx_queue(adapter, adapter->rx_ring[i]); + netif_tx_stop_all_queues(netdev); + netif_carrier_off(netdev); netif_tx_disable(netdev); txgbe_irq_disable(adapter); + txgbe_napi_disable_all(adapter); + adapter->flags2 &= ~(TXGBE_FLAG2_PF_RESET_REQUESTED | TXGBE_FLAG2_GLOBAL_RESET_REQUESTED); adapter->flags &= ~TXGBE_FLAG_NEED_LINK_UPDATE; @@ -1572,6 +1763,9 @@ void txgbe_down(struct txgbe_adapter *adapter) if (!(((hw->subsystem_device_id & TXGBE_NCSI_MASK) == TXGBE_NCSI_SUP))) /* power down the optics for SFP+ fiber */ TCALL(&adapter->hw, mac.ops.disable_tx_laser); + + txgbe_clean_all_tx_rings(adapter); + txgbe_clean_all_rx_rings(adapter); } /** @@ -1641,12 +1835,181 @@ static int txgbe_sw_init(struct txgbe_adapter *adapter) adapter->max_q_vectors = TXGBE_MAX_MSIX_Q_VECTORS_SAPPHIRE; + /* set default ring sizes */ + adapter->tx_ring_count = TXGBE_DEFAULT_TXD; + adapter->rx_ring_count = TXGBE_DEFAULT_RXD; + + /* set default work limits */ + adapter->tx_work_limit = TXGBE_DEFAULT_TX_WORK; + adapter->rx_work_limit = TXGBE_DEFAULT_RX_WORK; + set_bit(0, &adapter->fwd_bitmask); set_bit(__TXGBE_DOWN, &adapter->state); return 0; } +/** + * txgbe_setup_tx_resources - allocate Tx resources (Descriptors) + * @tx_ring: tx descriptor ring (for a specific queue) to setup + * + * Return 0 on success, negative on failure + **/ +int txgbe_setup_tx_resources(struct txgbe_ring *tx_ring) +{ + struct device *dev = tx_ring->dev; + int orig_node = dev_to_node(dev); + int numa_node = -1; + int size; + + size = sizeof(struct txgbe_tx_buffer) * tx_ring->count; + + if (tx_ring->q_vector) + numa_node = tx_ring->q_vector->numa_node; + + tx_ring->tx_buffer_info = vzalloc_node(size, numa_node); + if (!tx_ring->tx_buffer_info) + tx_ring->tx_buffer_info = vzalloc(size); + if (!tx_ring->tx_buffer_info) + goto err; + + /* round up to nearest 4K */ + tx_ring->size = tx_ring->count * sizeof(union txgbe_tx_desc); + tx_ring->size = ALIGN(tx_ring->size, 4096); + + set_dev_node(dev, numa_node); + tx_ring->desc = dma_alloc_coherent(dev, + tx_ring->size, + &tx_ring->dma, + GFP_KERNEL); + set_dev_node(dev, orig_node); + if (!tx_ring->desc) + tx_ring->desc = dma_alloc_coherent(dev, tx_ring->size, + &tx_ring->dma, GFP_KERNEL); + if (!tx_ring->desc) + goto err; + + return 0; + +err: + vfree(tx_ring->tx_buffer_info); + tx_ring->tx_buffer_info = NULL; + dev_err(dev, "Unable to allocate memory for the Tx descriptor ring\n"); + return -ENOMEM; +} + +/** + * txgbe_setup_all_tx_resources - allocate all queues Tx resources + * @adapter: board private structure + * + * If this function returns with an error, then it's possible one or + * more of the rings is populated (while the rest are not). It is the + * callers duty to clean those orphaned rings. + * + * Return 0 on success, negative on failure + **/ +static int txgbe_setup_all_tx_resources(struct txgbe_adapter *adapter) +{ + int i, err = 0; + + for (i = 0; i < adapter->num_tx_queues; i++) { + err = txgbe_setup_tx_resources(adapter->tx_ring[i]); + if (!err) + continue; + + netif_err(adapter, probe, adapter->netdev, + "Allocation for Tx Queue %u failed\n", i); + goto err_setup_tx; + } + + return 0; +err_setup_tx: + /* rewind the index freeing the rings as we go */ + while (i--) + txgbe_free_tx_resources(adapter->tx_ring[i]); + return err; +} + +/** + * txgbe_setup_rx_resources - allocate Rx resources (Descriptors) + * @rx_ring: rx descriptor ring (for a specific queue) to setup + * + * Returns 0 on success, negative on failure + **/ +int txgbe_setup_rx_resources(struct txgbe_ring *rx_ring) +{ + struct device *dev = rx_ring->dev; + int orig_node = dev_to_node(dev); + int numa_node = -1; + int size; + + size = sizeof(struct txgbe_rx_buffer) * rx_ring->count; + + if (rx_ring->q_vector) + numa_node = rx_ring->q_vector->numa_node; + + rx_ring->rx_buffer_info = vzalloc_node(size, numa_node); + if (!rx_ring->rx_buffer_info) + rx_ring->rx_buffer_info = vzalloc(size); + if (!rx_ring->rx_buffer_info) + goto err; + + /* Round up to nearest 4K */ + rx_ring->size = rx_ring->count * sizeof(union txgbe_rx_desc); + rx_ring->size = ALIGN(rx_ring->size, 4096); + + set_dev_node(dev, numa_node); + rx_ring->desc = dma_alloc_coherent(dev, + rx_ring->size, + &rx_ring->dma, + GFP_KERNEL); + set_dev_node(dev, orig_node); + if (!rx_ring->desc) + rx_ring->desc = dma_alloc_coherent(dev, rx_ring->size, + &rx_ring->dma, GFP_KERNEL); + if (!rx_ring->desc) + goto err; + + return 0; +err: + vfree(rx_ring->rx_buffer_info); + rx_ring->rx_buffer_info = NULL; + dev_err(dev, "Unable to allocate memory for the Rx descriptor ring\n"); + return -ENOMEM; +} + +/** + * txgbe_setup_all_rx_resources - allocate all queues Rx resources + * @adapter: board private structure + * + * If this function returns with an error, then it's possible one or + * more of the rings is populated (while the rest are not). It is the + * callers duty to clean those orphaned rings. + * + * Return 0 on success, negative on failure + **/ +static int txgbe_setup_all_rx_resources(struct txgbe_adapter *adapter) +{ + int i, err = 0; + + for (i = 0; i < adapter->num_rx_queues; i++) { + err = txgbe_setup_rx_resources(adapter->rx_ring[i]); + if (!err) + continue; + + netif_err(adapter, probe, adapter->netdev, + "Allocation for Rx Queue %u failed\n", i); + goto err_setup_rx; + } + + return 0; +err_setup_rx: + /* rewind the index freeing the rings as we go */ + while (i--) + txgbe_free_rx_resources(adapter->rx_ring[i]); + return err; +} + /** * txgbe_setup_isb_resources - allocate interrupt status resources * @adapter: board private structure @@ -1682,6 +2045,79 @@ static void txgbe_free_isb_resources(struct txgbe_adapter *adapter) adapter->isb_mem = NULL; } +/** + * txgbe_free_tx_resources - Free Tx Resources per Queue + * @tx_ring: Tx descriptor ring for a specific queue + * + * Free all transmit software resources + **/ +void txgbe_free_tx_resources(struct txgbe_ring *tx_ring) +{ + txgbe_clean_tx_ring(tx_ring); + + vfree(tx_ring->tx_buffer_info); + tx_ring->tx_buffer_info = NULL; + + /* if not set, then don't free */ + if (!tx_ring->desc) + return; + + dma_free_coherent(tx_ring->dev, tx_ring->size, + tx_ring->desc, tx_ring->dma); + tx_ring->desc = NULL; +} + +/** + * txgbe_free_all_tx_resources - Free Tx Resources for All Queues + * @adapter: board private structure + * + * Free all transmit software resources + **/ +static void txgbe_free_all_tx_resources(struct txgbe_adapter *adapter) +{ + int i; + + for (i = 0; i < adapter->num_tx_queues; i++) + txgbe_free_tx_resources(adapter->tx_ring[i]); +} + +/** + * txgbe_free_rx_resources - Free Rx Resources + * @rx_ring: ring to clean the resources from + * + * Free all receive software resources + **/ +void txgbe_free_rx_resources(struct txgbe_ring *rx_ring) +{ + txgbe_clean_rx_ring(rx_ring); + + vfree(rx_ring->rx_buffer_info); + rx_ring->rx_buffer_info = NULL; + + /* if not set, then don't free */ + if (!rx_ring->desc) + return; + + dma_free_coherent(rx_ring->dev, rx_ring->size, + rx_ring->desc, rx_ring->dma); + + rx_ring->desc = NULL; +} + +/** + * txgbe_free_all_rx_resources - Free Rx Resources for All Queues + * @adapter: board private structure + * + * Free all receive software resources + **/ +static void txgbe_free_all_rx_resources(struct txgbe_adapter *adapter) +{ + int i; + + for (i = 0; i < adapter->num_rx_queues; i++) + txgbe_free_rx_resources(adapter->rx_ring[i]); +} + /** * txgbe_open - Called when a network interface is made active * @netdev: network interface device structure @@ -1701,10 +2137,20 @@ int txgbe_open(struct net_device *netdev) netif_carrier_off(netdev); - err = txgbe_setup_isb_resources(adapter); + /* allocate transmit descriptors */ + err = txgbe_setup_all_tx_resources(adapter); if (err) goto err_reset; + /* allocate receive descriptors */ + err = txgbe_setup_all_rx_resources(adapter); + if (err) + goto err_free_tx; + + err = txgbe_setup_isb_resources(adapter); + if (err) + goto err_free_rx; + txgbe_configure(adapter); err = txgbe_request_irq(adapter); @@ -1728,6 +2174,10 @@ int txgbe_open(struct net_device *netdev) txgbe_free_irq(adapter); err_free_isb: txgbe_free_isb_resources(adapter); +err_free_rx: + txgbe_free_all_rx_resources(adapter); +err_free_tx: + txgbe_free_all_tx_resources(adapter); err_reset: txgbe_reset(adapter); @@ -1748,9 +2198,14 @@ static void txgbe_close_suspend(struct txgbe_adapter *adapter) txgbe_disable_device(adapter); if (!((hw->subsystem_device_id & TXGBE_NCSI_MASK) == TXGBE_NCSI_SUP)) TCALL(hw, mac.ops.disable_tx_laser); + txgbe_clean_all_tx_rings(adapter); + txgbe_clean_all_rx_rings(adapter); + txgbe_free_irq(adapter); txgbe_free_isb_resources(adapter); + txgbe_free_all_rx_resources(adapter); + txgbe_free_all_tx_resources(adapter); } /** @@ -1772,6 +2227,8 @@ int txgbe_close(struct net_device *netdev) txgbe_free_irq(adapter); txgbe_free_isb_resources(adapter); + txgbe_free_all_rx_resources(adapter); + txgbe_free_all_tx_resources(adapter); txgbe_release_hw_control(adapter); @@ -1904,6 +2361,7 @@ static void txgbe_watchdog_link_is_up(struct txgbe_adapter *adapter) "NIC Link is Up %s\n", speed_str); netif_carrier_on(netdev); + netif_tx_wake_all_queues(netdev); } /** @@ -1924,6 +2382,41 @@ static void txgbe_watchdog_link_is_down(struct txgbe_adapter *adapter) netif_info(adapter, drv, netdev, "NIC Link is Down\n"); netif_carrier_off(netdev); + netif_tx_stop_all_queues(netdev); +} + +static bool txgbe_ring_tx_pending(struct txgbe_adapter *adapter) +{ + int i; + + for (i = 0; i < adapter->num_tx_queues; i++) { + struct txgbe_ring *tx_ring = adapter->tx_ring[i]; + + if (tx_ring->next_to_use != tx_ring->next_to_clean) + return true; + } + + return false; +} + +/** + * txgbe_watchdog_flush_tx - flush queues on link down + * @adapter: pointer to the device adapter structure + **/ +static void txgbe_watchdog_flush_tx(struct txgbe_adapter *adapter) +{ + if (!netif_carrier_ok(adapter->netdev)) { + if (txgbe_ring_tx_pending(adapter)) { + /* We've lost link, so the controller stops DMA, + * but we've got queued Tx work that's never going + * to get done, so reset controller to flush Tx. + * (Do the reset outside of interrupt context). + */ + netif_warn(adapter, drv, adapter->netdev, + "initiating reset due to lost link with pending Tx work\n"); + adapter->flags2 |= TXGBE_FLAG2_PF_RESET_REQUESTED; + } + } } /** @@ -1944,6 +2437,8 @@ static void txgbe_watchdog_subtask(struct txgbe_adapter *adapter) txgbe_watchdog_link_is_up(adapter); else txgbe_watchdog_link_is_down(adapter); + + txgbe_watchdog_flush_tx(adapter); } /** @@ -2453,6 +2948,7 @@ static int txgbe_probe(struct pci_dev *pdev, /* carrier off reporting is important to ethtool even BEFORE open */ netif_carrier_off(netdev); + netif_tx_stop_all_queues(netdev); /* calculate the expected PCIe bandwidth required for optimal * performance. Note that some older parts will never have enough diff --git a/drivers/net/ethernet/wangxun/txgbe/txgbe_type.h b/drivers/net/ethernet/wangxun/txgbe/txgbe_type.h index fc51f82b6087..a2a38fc842e8 100644 --- a/drivers/net/ethernet/wangxun/txgbe/txgbe_type.h +++ b/drivers/net/ethernet/wangxun/txgbe/txgbe_type.h @@ -955,6 +955,51 @@ enum { #define TXGBE_PCIDEVCTRL2_4_8s 0xd #define TXGBE_PCIDEVCTRL2_17_34s 0xe +/* Transmit Descriptor */ +union txgbe_tx_desc { + struct { + __le64 buffer_addr; /* Address of descriptor's data buf */ + __le32 cmd_type_len; + __le32 olinfo_status; + } read; + struct { + __le64 rsvd; /* Reserved */ + __le32 nxtseq_seed; + __le32 status; + } wb; +}; + +/* Receive Descriptor */ +union txgbe_rx_desc { + struct { + __le64 pkt_addr; /* Packet buffer address */ + __le64 hdr_addr; /* Header buffer address */ + } read; + struct { + struct { + union { + __le32 data; + struct { + __le16 pkt_info; /* RSS, Pkt type */ + __le16 hdr_info; /* Splithdr, hdrlen */ + } hs_rss; + } lo_dword; + union { + __le32 rss; /* RSS Hash */ + struct { + __le16 ip_id; /* IP id */ + __le16 csum; /* Packet Checksum */ + } csum_ip; + } hi_dword; + } lower; + struct { + __le32 status_error; /* ext status/error */ + __le16 length; /* Packet length */ + __le16 vlan; /* VLAN tag */ + } upper; + } wb; /* writeback */ +}; + /****************** Manageablility Host Interface defines ********************/ #define TXGBE_HI_MAX_BLOCK_BYTE_LENGTH 256 /* Num of bytes in range */ #define TXGBE_HI_MAX_BLOCK_DWORD_LENGTH 64 /* Num of dwords in range */