From patchwork Tue Jan 31 10:05:32 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mengyuan Lou X-Patchwork-Id: 13122772 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 4521DC38142 for ; Tue, 31 Jan 2023 10:07:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229963AbjAaKH3 (ORCPT ); Tue, 31 Jan 2023 05:07:29 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36086 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230367AbjAaKHW (ORCPT ); Tue, 31 Jan 2023 05:07:22 -0500 Received: from smtpbg153.qq.com (smtpbg153.qq.com [13.245.218.24]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9541F366A2 for ; Tue, 31 Jan 2023 02:07:16 -0800 (PST) X-QQ-mid: bizesmtp69t1675159561tqn9k58m Received: from localhost.localdomain ( [183.129.236.74]) by bizesmtp.qq.com (ESMTP) with id ; Tue, 31 Jan 2023 18:05:55 +0800 (CST) X-QQ-SSF: 01400000000000M0O000000A0000000 X-QQ-FEAT: bNBJYFvbx27tMy6xlSPV0NE6Lhxm3+tUSLr4vVdgnSZy9WYFOy5B8uJ/O4NAU ZAZc+gAF3Imu0Uhn9oXPSUoC1IoCHDgvoUW5HXzOSgPag3pHqVJqJKIJ7P8bgdV1o79nTix 1d8u7z4ROxDInR5cCDdJwWSFFTbu48Yq3PF/xp8aKgfVhUDZY9tT3EoMXX1GvX3c5gsLLcu qbgVOct1kMo14yYq/zKMe2y31OFr8M+frZ1bd1xSicTmgfbc2xYVOjJGu/Q3xswMElHJ+4j +5wzqRhh/Wm0UKPzV8mIHQFNL/xumz6LslINttl5BdO/cNy+jlgfonCv3jRi3Mp38tuYpvV Gv7En/zZgnSBZcBZLhF8wPk/ETNbQD7j2jFm42cCDn2lfdPczSr0wFglYNsJHoaQFshdJbA tT6jksQTxP1Mylbh9ojRIQ== X-QQ-GoodBg: 2 From: Mengyuan Lou To: netdev@vger.kernel.org Cc: jiawenwu@trustnetic.com, Mengyuan Lou Subject: [PATCH net-next v2 01/10] net: libwx: Add irq flow functions Date: Tue, 31 Jan 2023 18:05:32 +0800 Message-Id: <20230131100541.73757-2-mengyuanlou@net-swift.com> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20230131100541.73757-1-mengyuanlou@net-swift.com> References: <20230131100541.73757-1-mengyuanlou@net-swift.com> MIME-Version: 1.0 X-QQ-SENDSIZE: 520 Feedback-ID: bizesmtp:net-swift.com:qybglogicsvr:qybglogicsvr1 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org Add irq flow functions for ngbe and txgbe. Alloc pcie msix irqs for drivers, otherwise fall back to msi/legacy. Signed-off-by: Mengyuan Lou --- drivers/net/ethernet/wangxun/libwx/Makefile | 2 +- drivers/net/ethernet/wangxun/libwx/wx_hw.c | 55 +- drivers/net/ethernet/wangxun/libwx/wx_hw.h | 3 + drivers/net/ethernet/wangxun/libwx/wx_lib.c | 613 +++++++++++++++++++ drivers/net/ethernet/wangxun/libwx/wx_lib.h | 20 + drivers/net/ethernet/wangxun/libwx/wx_type.h | 102 +++ 6 files changed, 793 insertions(+), 2 deletions(-) create mode 100644 drivers/net/ethernet/wangxun/libwx/wx_lib.c create mode 100644 drivers/net/ethernet/wangxun/libwx/wx_lib.h diff --git a/drivers/net/ethernet/wangxun/libwx/Makefile b/drivers/net/ethernet/wangxun/libwx/Makefile index 1ed5e23af944..850d1615cd18 100644 --- a/drivers/net/ethernet/wangxun/libwx/Makefile +++ b/drivers/net/ethernet/wangxun/libwx/Makefile @@ -4,4 +4,4 @@ obj-$(CONFIG_LIBWX) += libwx.o -libwx-objs := wx_hw.o +libwx-objs := wx_hw.o wx_lib.o diff --git a/drivers/net/ethernet/wangxun/libwx/wx_hw.c b/drivers/net/ethernet/wangxun/libwx/wx_hw.c index 3d7ba0c0df38..a72b02c72189 100644 --- a/drivers/net/ethernet/wangxun/libwx/wx_hw.c +++ b/drivers/net/ethernet/wangxun/libwx/wx_hw.c @@ -14,7 +14,7 @@ static void wx_intr_disable(struct wx *wx, u64 qmask) { u32 mask; - mask = (qmask & 0xFFFFFFFF); + mask = (qmask & U32_MAX); if (mask) wr32(wx, WX_PX_IMS(0), mask); @@ -25,6 +25,45 @@ static void wx_intr_disable(struct wx *wx, u64 qmask) } } +void wx_intr_enable(struct wx *wx, u64 qmask) +{ + u32 mask; + + mask = (qmask & U32_MAX); + if (mask) + wr32(wx, WX_PX_IMC(0), mask); + if (wx->mac.type == wx_mac_sp) { + mask = (qmask >> 32); + if (mask) + wr32(wx, WX_PX_IMC(1), mask); + } +} +EXPORT_SYMBOL(wx_intr_enable); + +/** + * wx_irq_disable - Mask off interrupt generation on the NIC + * @wx: board private structure + **/ +void wx_irq_disable(struct wx *wx) +{ + struct pci_dev *pdev = wx->pdev; + + wr32(wx, WX_PX_MISC_IEN, 0); + wx_intr_disable(wx, WX_INTR_ALL); + + if (pdev->msix_enabled) { + int vector; + + for (vector = 0; vector < wx->num_q_vectors; vector++) + synchronize_irq(wx->msix_entries[vector].vector); + + synchronize_irq(wx->msix_entries[vector].vector); + } else { + synchronize_irq(pdev->irq); + } +} +EXPORT_SYMBOL(wx_irq_disable); + /* cmd_addr is used for some special command: * 1. to be sector address, when implemented erase sector command * 2. to be flash address when implemented read, write flash address @@ -844,6 +883,20 @@ void wx_disable_rx(struct wx *wx) } EXPORT_SYMBOL(wx_disable_rx); +static void wx_configure_isb(struct wx *wx) +{ + /* set ISB Address */ + wr32(wx, WX_PX_ISB_ADDR_L, wx->isb_dma & DMA_BIT_MASK(32)); + if (IS_ENABLED(CONFIG_ARCH_DMA_ADDR_T_64BIT)) + wr32(wx, WX_PX_ISB_ADDR_H, wx->isb_dma >> 32); +} + +void wx_configure(struct wx *wx) +{ + wx_configure_isb(wx); +} +EXPORT_SYMBOL(wx_configure); + /** * wx_disable_pcie_master - Disable PCI-express master access * @wx: pointer to hardware structure diff --git a/drivers/net/ethernet/wangxun/libwx/wx_hw.h b/drivers/net/ethernet/wangxun/libwx/wx_hw.h index 803983546f3a..60bda129cfa6 100644 --- a/drivers/net/ethernet/wangxun/libwx/wx_hw.h +++ b/drivers/net/ethernet/wangxun/libwx/wx_hw.h @@ -4,6 +4,8 @@ #ifndef _WX_HW_H_ #define _WX_HW_H_ +void wx_intr_enable(struct wx *wx, u64 qmask); +void wx_irq_disable(struct wx *wx); int wx_check_flash_load(struct wx *wx, u32 check_bit); void wx_control_hw(struct wx *wx, bool drv); int wx_mng_present(struct wx *wx); @@ -20,6 +22,7 @@ void wx_mac_set_default_filter(struct wx *wx, u8 *addr); void wx_flush_sw_mac_table(struct wx *wx); int wx_set_mac(struct net_device *netdev, void *p); void wx_disable_rx(struct wx *wx); +void wx_configure(struct wx *wx); int wx_disable_pcie_master(struct wx *wx); int wx_stop_adapter(struct wx *wx); void wx_reset_misc(struct wx *wx); diff --git a/drivers/net/ethernet/wangxun/libwx/wx_lib.c b/drivers/net/ethernet/wangxun/libwx/wx_lib.c new file mode 100644 index 000000000000..76711087c184 --- /dev/null +++ b/drivers/net/ethernet/wangxun/libwx/wx_lib.c @@ -0,0 +1,613 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2019 - 2022 Beijing WangXun Technology Co., Ltd. */ + +#include +#include +#include + +#include "wx_type.h" +#include "wx_lib.h" + +/** + * wx_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. + **/ +static int wx_poll(struct napi_struct *napi, int budget) +{ + return 0; +} + +/** + * wx_set_rss_queues: Allocate queues for RSS + * @wx: board private structure to initialize + * + * This is our "base" multiqueue mode. RSS (Receive Side Scaling) will try + * to allocate one Rx queue per CPU, and if available, one Tx queue per CPU. + * + **/ +static void wx_set_rss_queues(struct wx *wx) +{ + wx->num_rx_queues = wx->mac.max_rx_queues; + wx->num_tx_queues = wx->mac.max_tx_queues; +} + +static void wx_set_num_queues(struct wx *wx) +{ + /* Start with base case */ + wx->num_rx_queues = 1; + wx->num_tx_queues = 1; + wx->queues_per_pool = 1; + + wx_set_rss_queues(wx); +} + +/** + * wx_acquire_msix_vectors - acquire MSI-X vectors + * @wx: board private structure + * + * Attempts to acquire a suitable range of MSI-X vector interrupts. Will + * return a negative error code if unable to acquire MSI-X vectors for any + * reason. + */ +static int wx_acquire_msix_vectors(struct wx *wx) +{ + struct irq_affinity affd = {0, }; + int nvecs, i; + + nvecs = min_t(int, num_online_cpus(), wx->mac.max_msix_vectors); + + wx->msix_entries = kcalloc(nvecs, + sizeof(struct msix_entry), + GFP_KERNEL); + if (!wx->msix_entries) + return -ENOMEM; + + nvecs = pci_alloc_irq_vectors_affinity(wx->pdev, nvecs, + nvecs, + PCI_IRQ_MSIX | PCI_IRQ_AFFINITY, + &affd); + if (nvecs < 0) { + wx_err(wx, "Failed to allocate MSI-X interrupts. Err: %d\n", nvecs); + kfree(wx->msix_entries); + wx->msix_entries = NULL; + return nvecs; + } + + for (i = 0; i < nvecs; i++) { + wx->msix_entries[i].entry = i; + wx->msix_entries[i].vector = pci_irq_vector(wx->pdev, i); + } + + /* one for msix_other */ + nvecs -= 1; + wx->num_q_vectors = nvecs; + wx->num_rx_queues = nvecs; + wx->num_tx_queues = nvecs; + + return 0; +} + +/** + * wx_set_interrupt_capability - set MSI-X or MSI if supported + * @wx: board private structure to initialize + * + * Attempt to configure the interrupts using the best available + * capabilities of the hardware and the kernel. + **/ +static int wx_set_interrupt_capability(struct wx *wx) +{ + struct pci_dev *pdev = wx->pdev; + int nvecs, ret; + + /* We will try to get MSI-X interrupts first */ + ret = wx_acquire_msix_vectors(wx); + if (ret == 0 || (ret == -ENOMEM)) + return ret; + + wx->num_rx_queues = 1; + wx->num_tx_queues = 1; + wx->num_q_vectors = 1; + + /* minmum one for queue, one for misc*/ + nvecs = 1; + nvecs = pci_alloc_irq_vectors(pdev, nvecs, + nvecs, PCI_IRQ_MSI | PCI_IRQ_LEGACY); + if (nvecs == 1) { + if (pdev->msi_enabled) + wx_err(wx, "Fallback to MSI.\n"); + else + wx_err(wx, "Fallback to LEGACY.\n"); + } else { + wx_err(wx, "Failed to allocate MSI/LEGACY interrupts. Error: %d\n", nvecs); + return nvecs; + } + + pdev->irq = pci_irq_vector(pdev, 0); + + return 0; +} + +/** + * wx_cache_ring_rss - Descriptor ring to register mapping for RSS + * @wx: board private structure to initialize + * + * Cache the descriptor ring offsets for RSS, ATR, FCoE, and SR-IOV. + * + **/ +static void wx_cache_ring_rss(struct wx *wx) +{ + u16 i; + + for (i = 0; i < wx->num_rx_queues; i++) + wx->rx_ring[i]->reg_idx = i; + + for (i = 0; i < wx->num_tx_queues; i++) + wx->tx_ring[i]->reg_idx = i; +} + +static void wx_add_ring(struct wx_ring *ring, struct wx_ring_container *head) +{ + ring->next = head->ring; + head->ring = ring; + head->count++; +} + +/** + * wx_alloc_q_vector - Allocate memory for a single interrupt vector + * @wx: board private structure to initialize + * @v_count: q_vectors allocated on wx, used for ring interleaving + * @v_idx: index of vector in wx struct + * @txr_count: total number of Tx rings to allocate + * @txr_idx: index of first Tx ring to allocate + * @rxr_count: total number of Rx rings to allocate + * @rxr_idx: index of first Rx ring to allocate + * + * We allocate one q_vector. If allocation fails we return -ENOMEM. + **/ +static int wx_alloc_q_vector(struct wx *wx, + unsigned int v_count, unsigned int v_idx, + unsigned int txr_count, unsigned int txr_idx, + unsigned int rxr_count, unsigned int rxr_idx) +{ + struct wx_q_vector *q_vector; + int ring_count, default_itr; + struct wx_ring *ring; + + /* note this will allocate space for the ring structure as well! */ + ring_count = txr_count + rxr_count; + + q_vector = kzalloc(struct_size(q_vector, ring, ring_count), + GFP_KERNEL); + if (!q_vector) + return -ENOMEM; + + /* initialize NAPI */ + netif_napi_add(wx->netdev, &q_vector->napi, + wx_poll); + + /* tie q_vector and wx together */ + wx->q_vector[v_idx] = q_vector; + q_vector->wx = wx; + q_vector->v_idx = v_idx; + + /* initialize work limits */ + q_vector->tx.work_limit = wx->tx_work_limit; + q_vector->rx.work_limit = wx->rx_work_limit; + + /* initialize pointer to rings */ + ring = q_vector->ring; + + if (wx->mac.type == wx_mac_sp) + default_itr = WX_12K_ITR; + else + default_itr = WX_7K_ITR; + /* initialize ITR */ + if (txr_count && !rxr_count) + /* tx only vector */ + q_vector->itr = wx->tx_itr_setting ? + default_itr : wx->tx_itr_setting; + else + /* rx or rx/tx vector */ + q_vector->itr = wx->rx_itr_setting ? + default_itr : wx->rx_itr_setting; + + while (txr_count) { + /* assign generic ring traits */ + ring->dev = &wx->pdev->dev; + ring->netdev = wx->netdev; + + /* configure backlink on ring */ + ring->q_vector = q_vector; + + /* update q_vector Tx values */ + wx_add_ring(ring, &q_vector->tx); + + /* apply Tx specific ring traits */ + ring->count = wx->tx_ring_count; + + ring->queue_index = txr_idx; + + /* assign ring to wx */ + wx->tx_ring[txr_idx] = ring; + + /* update count and index */ + txr_count--; + txr_idx += v_count; + + /* push pointer to next ring */ + ring++; + } + + while (rxr_count) { + /* assign generic ring traits */ + ring->dev = &wx->pdev->dev; + ring->netdev = wx->netdev; + + /* configure backlink on ring */ + ring->q_vector = q_vector; + + /* update q_vector Rx values */ + wx_add_ring(ring, &q_vector->rx); + + /* apply Rx specific ring traits */ + ring->count = wx->rx_ring_count; + ring->queue_index = rxr_idx; + + /* assign ring to wx */ + wx->rx_ring[rxr_idx] = ring; + + /* update count and index */ + rxr_count--; + rxr_idx += v_count; + + /* push pointer to next ring */ + ring++; + } + + return 0; +} + +/** + * wx_free_q_vector - Free memory allocated for specific interrupt vector + * @wx: board private structure to initialize + * @v_idx: Index of vector to be freed + * + * This function frees the memory allocated to the q_vector. In addition if + * NAPI is enabled it will delete any references to the NAPI struct prior + * to freeing the q_vector. + **/ +static void wx_free_q_vector(struct wx *wx, int v_idx) +{ + struct wx_q_vector *q_vector = wx->q_vector[v_idx]; + struct wx_ring *ring; + + wx_for_each_ring(ring, q_vector->tx) + wx->tx_ring[ring->queue_index] = NULL; + + wx_for_each_ring(ring, q_vector->rx) + wx->rx_ring[ring->queue_index] = NULL; + + wx->q_vector[v_idx] = NULL; + netif_napi_del(&q_vector->napi); + kfree_rcu(q_vector, rcu); +} + +/** + * wx_alloc_q_vectors - Allocate memory for interrupt vectors + * @wx: board private structure to initialize + * + * We allocate one q_vector per queue interrupt. If allocation fails we + * return -ENOMEM. + **/ +static int wx_alloc_q_vectors(struct wx *wx) +{ + unsigned int rxr_idx = 0, txr_idx = 0, v_idx = 0; + unsigned int rxr_remaining = wx->num_rx_queues; + unsigned int txr_remaining = wx->num_tx_queues; + unsigned int q_vectors = wx->num_q_vectors; + int rqpv, tqpv; + int err; + + for (; v_idx < q_vectors; v_idx++) { + rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - v_idx); + tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - v_idx); + err = wx_alloc_q_vector(wx, q_vectors, v_idx, + tqpv, txr_idx, + rqpv, rxr_idx); + + if (err) + goto err_out; + + /* update counts and index */ + rxr_remaining -= rqpv; + txr_remaining -= tqpv; + rxr_idx++; + txr_idx++; + } + + return 0; + +err_out: + wx->num_tx_queues = 0; + wx->num_rx_queues = 0; + wx->num_q_vectors = 0; + + while (v_idx--) + wx_free_q_vector(wx, v_idx); + + return -ENOMEM; +} + +/** + * wx_free_q_vectors - Free memory allocated for interrupt vectors + * @wx: board private structure to initialize + * + * This function frees the memory allocated to the q_vectors. In addition if + * NAPI is enabled it will delete any references to the NAPI struct prior + * to freeing the q_vector. + **/ +static void wx_free_q_vectors(struct wx *wx) +{ + int v_idx = wx->num_q_vectors; + + wx->num_tx_queues = 0; + wx->num_rx_queues = 0; + wx->num_q_vectors = 0; + + while (v_idx--) + wx_free_q_vector(wx, v_idx); +} + +void wx_reset_interrupt_capability(struct wx *wx) +{ + struct pci_dev *pdev = wx->pdev; + + if (!pdev->msi_enabled && !pdev->msix_enabled) + return; + + pci_free_irq_vectors(wx->pdev); + if (pdev->msix_enabled) { + kfree(wx->msix_entries); + wx->msix_entries = NULL; + } +} +EXPORT_SYMBOL(wx_reset_interrupt_capability); + +/** + * wx_clear_interrupt_scheme - Clear the current interrupt scheme settings + * @wx: board private structure to clear interrupt scheme on + * + * We go through and clear interrupt specific resources and reset the structure + * to pre-load conditions + **/ +void wx_clear_interrupt_scheme(struct wx *wx) +{ + wx_free_q_vectors(wx); + wx_reset_interrupt_capability(wx); +} +EXPORT_SYMBOL(wx_clear_interrupt_scheme); + +int wx_init_interrupt_scheme(struct wx *wx) +{ + int ret; + + /* Number of supported queues */ + wx_set_num_queues(wx); + + /* Set interrupt mode */ + ret = wx_set_interrupt_capability(wx); + if (ret) { + wx_err(wx, "Allocate irq vectors for failed.\n"); + return ret; + } + + /* Allocate memory for queues */ + ret = wx_alloc_q_vectors(wx); + if (ret) { + wx_err(wx, "Unable to allocate memory for queue vectors.\n"); + wx_reset_interrupt_capability(wx); + return ret; + } + + wx_cache_ring_rss(wx); + + return 0; +} +EXPORT_SYMBOL(wx_init_interrupt_scheme); + +irqreturn_t wx_msix_clean_rings(int __always_unused irq, void *data) +{ + struct wx_q_vector *q_vector = data; + + /* EIAM disabled interrupts (on this vector) for us */ + if (q_vector->rx.ring || q_vector->tx.ring) + napi_schedule_irqoff(&q_vector->napi); + + return IRQ_HANDLED; +} +EXPORT_SYMBOL(wx_msix_clean_rings); + +void wx_free_irq(struct wx *wx) +{ + struct pci_dev *pdev = wx->pdev; + int vector; + + if (!(pdev->msix_enabled)) { + free_irq(pdev->irq, wx); + return; + } + + for (vector = 0; vector < wx->num_q_vectors; vector++) { + struct wx_q_vector *q_vector = wx->q_vector[vector]; + struct msix_entry *entry = &wx->msix_entries[vector]; + + /* free only the irqs that were actually requested */ + if (!q_vector->rx.ring && !q_vector->tx.ring) + continue; + + free_irq(entry->vector, q_vector); + } + + free_irq(wx->msix_entries[vector].vector, wx); +} +EXPORT_SYMBOL(wx_free_irq); + +/** + * wx_setup_isb_resources - allocate interrupt status resources + * @wx: board private structure + * + * Return 0 on success, negative on failure + **/ +int wx_setup_isb_resources(struct wx *wx) +{ + struct pci_dev *pdev = wx->pdev; + + wx->isb_mem = dma_alloc_coherent(&pdev->dev, + sizeof(u32) * 4, + &wx->isb_dma, + GFP_KERNEL); + if (!wx->isb_mem) { + wx_err(wx, "Alloc isb_mem failed\n"); + return -ENOMEM; + } + memset(wx->isb_mem, 0, sizeof(u32) * 4); + return 0; +} +EXPORT_SYMBOL(wx_setup_isb_resources); + +/** + * wx_free_isb_resources - allocate all queues Rx resources + * @wx: board private structure + * + * Return 0 on success, negative on failure + **/ +void wx_free_isb_resources(struct wx *wx) +{ + struct pci_dev *pdev = wx->pdev; + + dma_free_coherent(&pdev->dev, sizeof(u32) * 4, + wx->isb_mem, wx->isb_dma); + wx->isb_mem = NULL; +} +EXPORT_SYMBOL(wx_free_isb_resources); + +u32 wx_misc_isb(struct wx *wx, enum wx_isb_idx idx) +{ + u32 cur_tag = 0; + + cur_tag = wx->isb_mem[WX_ISB_HEADER]; + wx->isb_tag[idx] = cur_tag; + + return (__force u32)cpu_to_le32(wx->isb_mem[idx]); +} +EXPORT_SYMBOL(wx_misc_isb); + +/** + * wx_set_ivar - set the IVAR registers, mapping interrupt causes to vectors + * @wx: pointer to wx struct + * @direction: 0 for Rx, 1 for Tx, -1 for other causes + * @queue: queue to map the corresponding interrupt to + * @msix_vector: the vector to map to the corresponding queue + * + **/ +static void wx_set_ivar(struct wx *wx, s8 direction, + u16 queue, u16 msix_vector) +{ + u32 ivar, index; + + if (direction == -1) { + /* other causes */ + msix_vector |= WX_PX_IVAR_ALLOC_VAL; + index = 0; + ivar = rd32(wx, WX_PX_MISC_IVAR); + ivar &= ~(0xFF << index); + ivar |= (msix_vector << index); + wr32(wx, WX_PX_MISC_IVAR, ivar); + } else { + /* tx or rx causes */ + msix_vector |= WX_PX_IVAR_ALLOC_VAL; + index = ((16 * (queue & 1)) + (8 * direction)); + ivar = rd32(wx, WX_PX_IVAR(queue >> 1)); + ivar &= ~(0xFF << index); + ivar |= (msix_vector << index); + wr32(wx, WX_PX_IVAR(queue >> 1), ivar); + } +} + +/** + * wx_write_eitr - write EITR register in hardware specific way + * @q_vector: structure containing interrupt and ring information + * + * This function is made to be called by ethtool and by the driver + * when it needs to update EITR registers at runtime. Hardware + * specific quirks/differences are taken care of here. + */ +static void wx_write_eitr(struct wx_q_vector *q_vector) +{ + struct wx *wx = q_vector->wx; + int v_idx = q_vector->v_idx; + u32 itr_reg; + + if (wx->mac.type == wx_mac_sp) + itr_reg = q_vector->itr & WX_SP_MAX_EITR; + else + itr_reg = q_vector->itr & WX_EM_MAX_EITR; + + itr_reg |= WX_PX_ITR_CNT_WDIS; + + wr32(wx, WX_PX_ITR(v_idx), itr_reg); +} + +/** + * wx_configure_vectors - Configure vectors for hardware + * @wx: board private structure + * + * wx_configure_vectors sets up the hardware to properly generate MSI-X/MSI/LEGACY + * interrupts. + **/ +void wx_configure_vectors(struct wx *wx) +{ + struct pci_dev *pdev = wx->pdev; + u32 eitrsel = 0; + u16 v_idx; + + if (pdev->msix_enabled) { + /* Populate MSIX to EITR Select */ + wr32(wx, WX_PX_ITRSEL, eitrsel); + /* use EIAM to auto-mask when MSI-X interrupt is asserted + * this saves a register write for every interrupt + */ + wr32(wx, WX_PX_GPIE, WX_PX_GPIE_MODEL); + } else { + /* legacy interrupts, use EIAM to auto-mask when reading EICR, + * specifically only auto mask tx and rx interrupts. + */ + wr32(wx, WX_PX_GPIE, 0); + } + + /* Populate the IVAR table and set the ITR values to the + * corresponding register. + */ + for (v_idx = 0; v_idx < wx->num_q_vectors; v_idx++) { + struct wx_q_vector *q_vector = wx->q_vector[v_idx]; + struct wx_ring *ring; + + wx_for_each_ring(ring, q_vector->rx) + wx_set_ivar(wx, 0, ring->reg_idx, v_idx); + + wx_for_each_ring(ring, q_vector->tx) + wx_set_ivar(wx, 1, ring->reg_idx, v_idx); + + wx_write_eitr(q_vector); + } + + wx_set_ivar(wx, -1, 0, v_idx); + if (pdev->msix_enabled) + wr32(wx, WX_PX_ITR(v_idx), 1950); +} +EXPORT_SYMBOL(wx_configure_vectors); + +MODULE_LICENSE("GPL"); diff --git a/drivers/net/ethernet/wangxun/libwx/wx_lib.h b/drivers/net/ethernet/wangxun/libwx/wx_lib.h new file mode 100644 index 000000000000..8ae657155f34 --- /dev/null +++ b/drivers/net/ethernet/wangxun/libwx/wx_lib.h @@ -0,0 +1,20 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * WangXun Gigabit PCI Express Linux driver + * Copyright (c) 2019 - 2022 Beijing WangXun Technology Co., Ltd. + */ + +#ifndef _WX_LIB_H_ +#define _WX_LIB_H_ + +void wx_reset_interrupt_capability(struct wx *wx); +void wx_clear_interrupt_scheme(struct wx *wx); +int wx_init_interrupt_scheme(struct wx *wx); +irqreturn_t wx_msix_clean_rings(int __always_unused irq, void *data); +void wx_free_irq(struct wx *wx); +int wx_setup_isb_resources(struct wx *wx); +void wx_free_isb_resources(struct wx *wx); +u32 wx_misc_isb(struct wx *wx, enum wx_isb_idx idx); +void wx_configure_vectors(struct wx *wx); + +#endif /* _NGBE_LIB_H_ */ diff --git a/drivers/net/ethernet/wangxun/libwx/wx_type.h b/drivers/net/ethernet/wangxun/libwx/wx_type.h index c86a37914d43..7368c681221f 100644 --- a/drivers/net/ethernet/wangxun/libwx/wx_type.h +++ b/drivers/net/ethernet/wangxun/libwx/wx_type.h @@ -5,6 +5,7 @@ #define _WX_TYPE_H_ #include +#include /* Vendor ID */ #ifndef PCI_VENDOR_ID_WANGXUN @@ -66,6 +67,22 @@ #define WX_CFG_PORT_CTL 0x14400 #define WX_CFG_PORT_CTL_DRV_LOAD BIT(3) +/* GPIO Registers */ +#define WX_GPIO_DR 0x14800 +#define WX_GPIO_DR_0 BIT(0) /* SDP0 Data Value */ +#define WX_GPIO_DR_1 BIT(1) /* SDP1 Data Value */ +#define WX_GPIO_DDR 0x14804 +#define WX_GPIO_DDR_0 BIT(0) /* SDP0 IO direction */ +#define WX_GPIO_DDR_1 BIT(1) /* SDP1 IO direction */ +#define WX_GPIO_CTL 0x14808 +#define WX_GPIO_INTEN 0x14830 +#define WX_GPIO_INTEN_0 BIT(0) +#define WX_GPIO_INTEN_1 BIT(1) +#define WX_GPIO_INTMASK 0x14834 +#define WX_GPIO_INTTYPE_LEVEL 0x14838 +#define WX_GPIO_POLARITY 0x1483C +#define WX_GPIO_EOI 0x1484C + /*********************** Transmit DMA registers **************************/ /* transmit global control */ #define WX_TDM_CTL 0x18000 @@ -151,8 +168,28 @@ /* Interrupt Registers */ #define WX_BME_CTL 0x12020 #define WX_PX_MISC_IC 0x100 +#define WX_PX_MISC_ICS 0x104 +#define WX_PX_MISC_IEN 0x108 +#define WX_PX_INTA 0x110 +#define WX_PX_GPIE 0x118 +#define WX_PX_GPIE_MODEL BIT(0) +#define WX_PX_IC 0x120 #define WX_PX_IMS(_i) (0x140 + (_i) * 4) +#define WX_PX_IMC(_i) (0x150 + (_i) * 4) +#define WX_PX_ISB_ADDR_L 0x160 +#define WX_PX_ISB_ADDR_H 0x164 #define WX_PX_TRANSACTION_PENDING 0x168 +#define WX_PX_ITRSEL 0x180 +#define WX_PX_ITR(_i) (0x200 + (_i) * 4) +#define WX_PX_ITR_CNT_WDIS BIT(31) +#define WX_PX_MISC_IVAR 0x4FC +#define WX_PX_IVAR(_i) (0x500 + (_i) * 4) + +#define WX_PX_IVAR_ALLOC_VAL 0x80 /* Interrupt Allocation valid */ +#define WX_7K_ITR 595 +#define WX_12K_ITR 336 +#define WX_SP_MAX_EITR 0x00000FF8U +#define WX_EM_MAX_EITR 0x00007FFCU /* transmit DMA Registers */ #define WX_PX_TR_CFG(_i) (0x03010 + ((_i) * 0x40)) @@ -312,6 +349,59 @@ enum wx_reset_type { WX_GLOBAL_RESET }; +/* iterator for handling rings in ring container */ +#define wx_for_each_ring(posm, headm) \ + for (posm = (headm).ring; posm; posm = posm->next) + +struct wx_ring_container { + struct wx_ring *ring; /* pointer to linked list of rings */ + u16 work_limit; /* total work allowed per interrupt */ + u8 count; /* total number of rings in vector */ + u8 itr; /* current ITR setting for ring */ +}; + +struct wx_ring { + struct wx_ring *next; /* pointer to next ring in q_vector */ + struct wx_q_vector *q_vector; /* backpointer to host q_vector */ + struct net_device *netdev; /* netdev ring belongs to */ + struct device *dev; /* device for DMA mapping */ + + u16 count; /* amount of descriptors */ + + u8 queue_index; /* needed for multiqueue queue management */ + u8 reg_idx; /* holds the special value that gets + * the hardware register offset + * associated with this ring, which is + * different for DCB and RSS modes + */ +} ____cacheline_internodealigned_in_smp; + +struct wx_q_vector { + struct wx *wx; + int cpu; /* CPU for DCA */ + u16 v_idx; /* index of q_vector within array, also used for + * finding the bit in EICR and friends that + * represents the vector for this ring + */ + u16 itr; /* Interrupt throttle rate written to EITR */ + struct wx_ring_container rx, tx; + struct napi_struct napi; + struct rcu_head rcu; /* to avoid race with update stats on free */ + + char name[IFNAMSIZ + 17]; + + /* for dynamic allocation of rings associated with this q_vector */ + struct wx_ring ring[0] ____cacheline_internodealigned_in_smp; +}; + +enum wx_isb_idx { + WX_ISB_HEADER, + WX_ISB_MISC, + WX_ISB_VEC0, + WX_ISB_VEC1, + WX_ISB_MAX +}; + struct wx { u8 __iomem *hw_addr; struct pci_dev *pdev; @@ -360,6 +450,18 @@ struct wx { u32 tx_ring_count; u32 rx_ring_count; + struct wx_ring *tx_ring[64] ____cacheline_aligned_in_smp; + struct wx_ring *rx_ring[64]; + struct wx_q_vector *q_vector[64]; + + unsigned int queues_per_pool; + struct msix_entry *msix_entries; + + /* misc interrupt status block */ + dma_addr_t isb_dma; + u32 *isb_mem; + u32 isb_tag[WX_ISB_MAX]; + #define WX_MAX_RETA_ENTRIES 128 u8 rss_indir_tbl[WX_MAX_RETA_ENTRIES];