--- /dev/null
+/*
+ * drivers/net/ethernet/mellanox/mlxsw/pci.c
+ * Copyright (c) 2015 Mellanox Technologies. All rights reserved.
+ * Copyright (c) 2015 Jiri Pirko <jiri@mellanox.com>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the names of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/export.h>
+#include <linux/err.h>
+#include <linux/device.h>
+#include <linux/pci.h>
+#include <linux/interrupt.h>
+#include <linux/wait.h>
+#include <linux/types.h>
+#include <linux/skbuff.h>
+#include <linux/if_vlan.h>
+#include <linux/log2.h>
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+#include <linux/string.h>
+
+#include "pci.h"
+#include "core.h"
+#include "cmd.h"
+#include "port.h"
+
+static const char mlxsw_pci_driver_name[] = "mlxsw_pci";
+
+static const struct pci_device_id mlxsw_pci_id_table[] = {
+ {PCI_VDEVICE(MELLANOX, PCI_DEVICE_ID_MELLANOX_SWITCHX2), 0},
+ {PCI_VDEVICE(MELLANOX, PCI_DEVICE_ID_MELLANOX_SPECTRUM), 0},
+ {0, }
+};
+
+static struct dentry *mlxsw_pci_dbg_root;
+
+static const char *mlxsw_pci_device_kind_get(const struct pci_device_id *id)
+{
+ switch (id->device) {
+ case PCI_DEVICE_ID_MELLANOX_SWITCHX2:
+ return MLXSW_DEVICE_KIND_SWITCHX2;
+ case PCI_DEVICE_ID_MELLANOX_SPECTRUM:
+ return MLXSW_DEVICE_KIND_SPECTRUM;
+ default:
+ BUG();
+ }
+}
+
+#define mlxsw_pci_write32(mlxsw_pci, reg, val) \
+ iowrite32be(val, (mlxsw_pci)->hw_addr + (MLXSW_PCI_ ## reg))
+#define mlxsw_pci_read32(mlxsw_pci, reg) \
+ ioread32be((mlxsw_pci)->hw_addr + (MLXSW_PCI_ ## reg))
+
+enum mlxsw_pci_queue_type {
+ MLXSW_PCI_QUEUE_TYPE_SDQ,
+ MLXSW_PCI_QUEUE_TYPE_RDQ,
+ MLXSW_PCI_QUEUE_TYPE_CQ,
+ MLXSW_PCI_QUEUE_TYPE_EQ,
+};
+
+static const char *mlxsw_pci_queue_type_str(enum mlxsw_pci_queue_type q_type)
+{
+ switch (q_type) {
+ case MLXSW_PCI_QUEUE_TYPE_SDQ:
+ return "sdq";
+ case MLXSW_PCI_QUEUE_TYPE_RDQ:
+ return "rdq";
+ case MLXSW_PCI_QUEUE_TYPE_CQ:
+ return "cq";
+ case MLXSW_PCI_QUEUE_TYPE_EQ:
+ return "eq";
+ }
+ BUG();
+}
+
+#define MLXSW_PCI_QUEUE_TYPE_COUNT 4
+
+static const u16 mlxsw_pci_doorbell_type_offset[] = {
+ MLXSW_PCI_DOORBELL_SDQ_OFFSET, /* for type MLXSW_PCI_QUEUE_TYPE_SDQ */
+ MLXSW_PCI_DOORBELL_RDQ_OFFSET, /* for type MLXSW_PCI_QUEUE_TYPE_RDQ */
+ MLXSW_PCI_DOORBELL_CQ_OFFSET, /* for type MLXSW_PCI_QUEUE_TYPE_CQ */
+ MLXSW_PCI_DOORBELL_EQ_OFFSET, /* for type MLXSW_PCI_QUEUE_TYPE_EQ */
+};
+
+static const u16 mlxsw_pci_doorbell_arm_type_offset[] = {
+ 0, /* unused */
+ 0, /* unused */
+ MLXSW_PCI_DOORBELL_ARM_CQ_OFFSET, /* for type MLXSW_PCI_QUEUE_TYPE_CQ */
+ MLXSW_PCI_DOORBELL_ARM_EQ_OFFSET, /* for type MLXSW_PCI_QUEUE_TYPE_EQ */
+};
+
+struct mlxsw_pci_mem_item {
+ char *buf;
+ dma_addr_t mapaddr;
+ size_t size;
+};
+
+struct mlxsw_pci_queue_elem_info {
+ char *elem; /* pointer to actual dma mapped element mem chunk */
+ union {
+ struct {
+ struct sk_buff *skb;
+ } sdq;
+ struct {
+ struct sk_buff *skb;
+ } rdq;
+ } u;
+};
+
+struct mlxsw_pci_queue {
+ spinlock_t lock; /* for queue accesses */
+ struct mlxsw_pci_mem_item mem_item;
+ struct mlxsw_pci_queue_elem_info *elem_info;
+ u16 producer_counter;
+ u16 consumer_counter;
+ u16 count; /* number of elements in queue */
+ u8 num; /* queue number */
+ u8 elem_size; /* size of one element */
+ enum mlxsw_pci_queue_type type;
+ struct tasklet_struct tasklet; /* queue processing tasklet */
+ struct mlxsw_pci *pci;
+ union {
+ struct {
+ u32 comp_sdq_count;
+ u32 comp_rdq_count;
+ } cq;
+ struct {
+ u32 ev_cmd_count;
+ u32 ev_comp_count;
+ u32 ev_other_count;
+ } eq;
+ } u;
+};
+
+struct mlxsw_pci_queue_type_group {
+ struct mlxsw_pci_queue *q;
+ u8 count; /* number of queues in group */
+};
+
+struct mlxsw_pci {
+ struct pci_dev *pdev;
+ u8 __iomem *hw_addr;
+ struct mlxsw_pci_queue_type_group queues[MLXSW_PCI_QUEUE_TYPE_COUNT];
+ u32 doorbell_offset;
+ struct msix_entry msix_entry;
+ struct mlxsw_core *core;
+ struct {
+ struct mlxsw_pci_mem_item *items;
+ unsigned int count;
+ } fw_area;
+ struct {
+ struct mlxsw_pci_mem_item out_mbox;
+ struct mlxsw_pci_mem_item in_mbox;
+ struct mutex lock; /* Lock access to command registers */
+ bool nopoll;
+ wait_queue_head_t wait;
+ bool wait_done;
+ struct {
+ u8 status;
+ u64 out_param;
+ } comp;
+ } cmd;
+ struct mlxsw_bus_info bus_info;
+ struct dentry *dbg_dir;
+};
+
+static void mlxsw_pci_queue_tasklet_schedule(struct mlxsw_pci_queue *q)
+{
+ tasklet_schedule(&q->tasklet);
+}
+
+static char *__mlxsw_pci_queue_elem_get(struct mlxsw_pci_queue *q,
+ size_t elem_size, int elem_index)
+{
+ return q->mem_item.buf + (elem_size * elem_index);
+}
+
+static struct mlxsw_pci_queue_elem_info *
+mlxsw_pci_queue_elem_info_get(struct mlxsw_pci_queue *q, int elem_index)
+{
+ return &q->elem_info[elem_index];
+}
+
+static struct mlxsw_pci_queue_elem_info *
+mlxsw_pci_queue_elem_info_producer_get(struct mlxsw_pci_queue *q)
+{
+ int index = q->producer_counter & (q->count - 1);
+
+ if ((q->producer_counter - q->consumer_counter) == q->count)
+ return NULL;
+ return mlxsw_pci_queue_elem_info_get(q, index);
+}
+
+static struct mlxsw_pci_queue_elem_info *
+mlxsw_pci_queue_elem_info_consumer_get(struct mlxsw_pci_queue *q)
+{
+ int index = q->consumer_counter & (q->count - 1);
+
+ return mlxsw_pci_queue_elem_info_get(q, index);
+}
+
+static char *mlxsw_pci_queue_elem_get(struct mlxsw_pci_queue *q, int elem_index)
+{
+ return mlxsw_pci_queue_elem_info_get(q, elem_index)->elem;
+}
+
+static bool mlxsw_pci_elem_hw_owned(struct mlxsw_pci_queue *q, bool owner_bit)
+{
+ return owner_bit != !!(q->consumer_counter & q->count);
+}
+
+static char *mlxsw_pci_queue_sw_elem_get(struct mlxsw_pci_queue *q,
+ u32 (*get_elem_owner_func)(char *))
+{
+ struct mlxsw_pci_queue_elem_info *elem_info;
+ char *elem;
+ bool owner_bit;
+
+ elem_info = mlxsw_pci_queue_elem_info_consumer_get(q);
+ elem = elem_info->elem;
+ owner_bit = get_elem_owner_func(elem);
+ if (mlxsw_pci_elem_hw_owned(q, owner_bit))
+ return NULL;
+ q->consumer_counter++;
+ rmb(); /* make sure we read owned bit before the rest of elem */
+ return elem;
+}
+
+static struct mlxsw_pci_queue_type_group *
+mlxsw_pci_queue_type_group_get(struct mlxsw_pci *mlxsw_pci,
+ enum mlxsw_pci_queue_type q_type)
+{
+ return &mlxsw_pci->queues[q_type];
+}
+
+static u8 __mlxsw_pci_queue_count(struct mlxsw_pci *mlxsw_pci,
+ enum mlxsw_pci_queue_type q_type)
+{
+ struct mlxsw_pci_queue_type_group *queue_group;
+
+ queue_group = mlxsw_pci_queue_type_group_get(mlxsw_pci, q_type);
+ return queue_group->count;
+}
+
+static u8 mlxsw_pci_sdq_count(struct mlxsw_pci *mlxsw_pci)
+{
+ return __mlxsw_pci_queue_count(mlxsw_pci, MLXSW_PCI_QUEUE_TYPE_SDQ);
+}
+
+static u8 mlxsw_pci_rdq_count(struct mlxsw_pci *mlxsw_pci)
+{
+ return __mlxsw_pci_queue_count(mlxsw_pci, MLXSW_PCI_QUEUE_TYPE_RDQ);
+}
+
+static u8 mlxsw_pci_cq_count(struct mlxsw_pci *mlxsw_pci)
+{
+ return __mlxsw_pci_queue_count(mlxsw_pci, MLXSW_PCI_QUEUE_TYPE_CQ);
+}
+
+static u8 mlxsw_pci_eq_count(struct mlxsw_pci *mlxsw_pci)
+{
+ return __mlxsw_pci_queue_count(mlxsw_pci, MLXSW_PCI_QUEUE_TYPE_EQ);
+}
+
+static struct mlxsw_pci_queue *
+__mlxsw_pci_queue_get(struct mlxsw_pci *mlxsw_pci,
+ enum mlxsw_pci_queue_type q_type, u8 q_num)
+{
+ return &mlxsw_pci->queues[q_type].q[q_num];
+}
+
+static struct mlxsw_pci_queue *mlxsw_pci_sdq_get(struct mlxsw_pci *mlxsw_pci,
+ u8 q_num)
+{
+ return __mlxsw_pci_queue_get(mlxsw_pci,
+ MLXSW_PCI_QUEUE_TYPE_SDQ, q_num);
+}
+
+static struct mlxsw_pci_queue *mlxsw_pci_rdq_get(struct mlxsw_pci *mlxsw_pci,
+ u8 q_num)
+{
+ return __mlxsw_pci_queue_get(mlxsw_pci,
+ MLXSW_PCI_QUEUE_TYPE_RDQ, q_num);
+}
+
+static struct mlxsw_pci_queue *mlxsw_pci_cq_get(struct mlxsw_pci *mlxsw_pci,
+ u8 q_num)
+{
+ return __mlxsw_pci_queue_get(mlxsw_pci, MLXSW_PCI_QUEUE_TYPE_CQ, q_num);
+}
+
+static struct mlxsw_pci_queue *mlxsw_pci_eq_get(struct mlxsw_pci *mlxsw_pci,
+ u8 q_num)
+{
+ return __mlxsw_pci_queue_get(mlxsw_pci, MLXSW_PCI_QUEUE_TYPE_EQ, q_num);
+}
+
+static void __mlxsw_pci_queue_doorbell_set(struct mlxsw_pci *mlxsw_pci,
+ struct mlxsw_pci_queue *q,
+ u16 val)
+{
+ mlxsw_pci_write32(mlxsw_pci,
+ DOORBELL(mlxsw_pci->doorbell_offset,
+ mlxsw_pci_doorbell_type_offset[q->type],
+ q->num), val);
+}
+
+static void __mlxsw_pci_queue_doorbell_arm_set(struct mlxsw_pci *mlxsw_pci,
+ struct mlxsw_pci_queue *q,
+ u16 val)
+{
+ mlxsw_pci_write32(mlxsw_pci,
+ DOORBELL(mlxsw_pci->doorbell_offset,
+ mlxsw_pci_doorbell_arm_type_offset[q->type],
+ q->num), val);
+}
+
+static void mlxsw_pci_queue_doorbell_producer_ring(struct mlxsw_pci *mlxsw_pci,
+ struct mlxsw_pci_queue *q)
+{
+ wmb(); /* ensure all writes are done before we ring a bell */
+ __mlxsw_pci_queue_doorbell_set(mlxsw_pci, q, q->producer_counter);
+}
+
+static void mlxsw_pci_queue_doorbell_consumer_ring(struct mlxsw_pci *mlxsw_pci,
+ struct mlxsw_pci_queue *q)
+{
+ wmb(); /* ensure all writes are done before we ring a bell */
+ __mlxsw_pci_queue_doorbell_set(mlxsw_pci, q,
+ q->consumer_counter + q->count);
+}
+
+static void
+mlxsw_pci_queue_doorbell_arm_consumer_ring(struct mlxsw_pci *mlxsw_pci,
+ struct mlxsw_pci_queue *q)
+{
+ wmb(); /* ensure all writes are done before we ring a bell */
+ __mlxsw_pci_queue_doorbell_arm_set(mlxsw_pci, q, q->consumer_counter);
+}
+
+static dma_addr_t __mlxsw_pci_queue_page_get(struct mlxsw_pci_queue *q,
+ int page_index)
+{
+ return q->mem_item.mapaddr + MLXSW_PCI_PAGE_SIZE * page_index;
+}
+
+static int mlxsw_pci_sdq_init(struct mlxsw_pci *mlxsw_pci, char *mbox,
+ struct mlxsw_pci_queue *q)
+{
+ int i;
+ int err;
+
+ q->producer_counter = 0;
+ q->consumer_counter = 0;
+
+ /* Set CQ of same number of this SDQ. */
+ mlxsw_cmd_mbox_sw2hw_dq_cq_set(mbox, q->num);
+ mlxsw_cmd_mbox_sw2hw_dq_sdq_tclass_set(mbox, 7);
+ mlxsw_cmd_mbox_sw2hw_dq_log2_dq_sz_set(mbox, 3); /* 8 pages */
+ for (i = 0; i < MLXSW_PCI_AQ_PAGES; i++) {
+ dma_addr_t mapaddr = __mlxsw_pci_queue_page_get(q, i);
+
+ mlxsw_cmd_mbox_sw2hw_dq_pa_set(mbox, i, mapaddr);
+ }
+
+ err = mlxsw_cmd_sw2hw_sdq(mlxsw_pci->core, mbox, q->num);
+ if (err)
+ return err;
+ mlxsw_pci_queue_doorbell_producer_ring(mlxsw_pci, q);
+ return 0;
+}
+
+static void mlxsw_pci_sdq_fini(struct mlxsw_pci *mlxsw_pci,
+ struct mlxsw_pci_queue *q)
+{
+ mlxsw_cmd_hw2sw_sdq(mlxsw_pci->core, q->num);
+}
+
+static int mlxsw_pci_sdq_dbg_read(struct seq_file *file, void *data)
+{
+ struct mlxsw_pci *mlxsw_pci = dev_get_drvdata(file->private);
+ struct mlxsw_pci_queue *q;
+ int i;
+ static const char hdr[] =
+ "NUM PROD_COUNT CONS_COUNT COUNT\n";
+
+ seq_printf(file, hdr);
+ for (i = 0; i < mlxsw_pci_sdq_count(mlxsw_pci); i++) {
+ q = mlxsw_pci_sdq_get(mlxsw_pci, i);
+ spin_lock_bh(&q->lock);
+ seq_printf(file, "%3d %10d %10d %5d\n",
+ i, q->producer_counter, q->consumer_counter,
+ q->count);
+ spin_unlock_bh(&q->lock);
+ }
+ return 0;
+}
+
+static int mlxsw_pci_wqe_frag_map(struct mlxsw_pci *mlxsw_pci, char *wqe,
+ int index, char *frag_data, size_t frag_len,
+ int direction)
+{
+ struct pci_dev *pdev = mlxsw_pci->pdev;
+ dma_addr_t mapaddr;
+
+ mapaddr = pci_map_single(pdev, frag_data, frag_len, direction);
+ if (unlikely(pci_dma_mapping_error(pdev, mapaddr))) {
+ dev_err_ratelimited(&pdev->dev, "failed to dma map tx frag\n");
+ return -EIO;
+ }
+ mlxsw_pci_wqe_address_set(wqe, index, mapaddr);
+ mlxsw_pci_wqe_byte_count_set(wqe, index, frag_len);
+ return 0;
+}
+
+static void mlxsw_pci_wqe_frag_unmap(struct mlxsw_pci *mlxsw_pci, char *wqe,
+ int index, int direction)
+{
+ struct pci_dev *pdev = mlxsw_pci->pdev;
+ size_t frag_len = mlxsw_pci_wqe_byte_count_get(wqe, index);
+ dma_addr_t mapaddr = mlxsw_pci_wqe_address_get(wqe, index);
+
+ if (!frag_len)
+ return;
+ pci_unmap_single(pdev, mapaddr, frag_len, direction);
+}
+
+static int mlxsw_pci_rdq_skb_alloc(struct mlxsw_pci *mlxsw_pci,
+ struct mlxsw_pci_queue_elem_info *elem_info)
+{
+ size_t buf_len = MLXSW_PORT_MAX_MTU;
+ char *wqe = elem_info->elem;
+ struct sk_buff *skb;
+ int err;
+
+ elem_info->u.rdq.skb = NULL;
+ skb = netdev_alloc_skb_ip_align(NULL, buf_len);
+ if (!skb)
+ return -ENOMEM;
+
+ /* Assume that wqe was previously zeroed. */
+
+ err = mlxsw_pci_wqe_frag_map(mlxsw_pci, wqe, 0, skb->data,
+ buf_len, DMA_FROM_DEVICE);
+ if (err)
+ goto err_frag_map;
+
+ elem_info->u.rdq.skb = skb;
+ return 0;
+
+err_frag_map:
+ dev_kfree_skb_any(skb);
+ return err;
+}
+
+static void mlxsw_pci_rdq_skb_free(struct mlxsw_pci *mlxsw_pci,
+ struct mlxsw_pci_queue_elem_info *elem_info)
+{
+ struct sk_buff *skb;
+ char *wqe;
+
+ skb = elem_info->u.rdq.skb;
+ wqe = elem_info->elem;
+
+ mlxsw_pci_wqe_frag_unmap(mlxsw_pci, wqe, 0, DMA_FROM_DEVICE);
+ dev_kfree_skb_any(skb);
+}
+
+static int mlxsw_pci_rdq_init(struct mlxsw_pci *mlxsw_pci, char *mbox,
+ struct mlxsw_pci_queue *q)
+{
+ struct mlxsw_pci_queue_elem_info *elem_info;
+ u8 sdq_count = mlxsw_pci_sdq_count(mlxsw_pci);
+ int i;
+ int err;
+
+ q->producer_counter = 0;
+ q->consumer_counter = 0;
+
+ /* Set CQ of same number of this RDQ with base
+ * above SDQ count as the lower ones are assigned to SDQs.
+ */
+ mlxsw_cmd_mbox_sw2hw_dq_cq_set(mbox, sdq_count + q->num);
+ mlxsw_cmd_mbox_sw2hw_dq_log2_dq_sz_set(mbox, 3); /* 8 pages */
+ for (i = 0; i < MLXSW_PCI_AQ_PAGES; i++) {
+ dma_addr_t mapaddr = __mlxsw_pci_queue_page_get(q, i);
+
+ mlxsw_cmd_mbox_sw2hw_dq_pa_set(mbox, i, mapaddr);
+ }
+
+ err = mlxsw_cmd_sw2hw_rdq(mlxsw_pci->core, mbox, q->num);
+ if (err)
+ return err;
+
+ mlxsw_pci_queue_doorbell_producer_ring(mlxsw_pci, q);
+
+ for (i = 0; i < q->count; i++) {
+ elem_info = mlxsw_pci_queue_elem_info_producer_get(q);
+ BUG_ON(!elem_info);
+ err = mlxsw_pci_rdq_skb_alloc(mlxsw_pci, elem_info);
+ if (err)
+ goto rollback;
+ /* Everything is set up, ring doorbell to pass elem to HW */
+ q->producer_counter++;
+ mlxsw_pci_queue_doorbell_producer_ring(mlxsw_pci, q);
+ }
+
+ return 0;
+
+rollback:
+ for (i--; i >= 0; i--) {
+ elem_info = mlxsw_pci_queue_elem_info_get(q, i);
+ mlxsw_pci_rdq_skb_free(mlxsw_pci, elem_info);
+ }
+ mlxsw_cmd_hw2sw_rdq(mlxsw_pci->core, q->num);
+
+ return err;
+}
+
+static void mlxsw_pci_rdq_fini(struct mlxsw_pci *mlxsw_pci,
+ struct mlxsw_pci_queue *q)
+{
+ struct mlxsw_pci_queue_elem_info *elem_info;
+ int i;
+
+ mlxsw_cmd_hw2sw_rdq(mlxsw_pci->core, q->num);
+ for (i = 0; i < q->count; i++) {
+ elem_info = mlxsw_pci_queue_elem_info_get(q, i);
+ mlxsw_pci_rdq_skb_free(mlxsw_pci, elem_info);
+ }
+}
+
+static int mlxsw_pci_rdq_dbg_read(struct seq_file *file, void *data)
+{
+ struct mlxsw_pci *mlxsw_pci = dev_get_drvdata(file->private);
+ struct mlxsw_pci_queue *q;
+ int i;
+ static const char hdr[] =
+ "NUM PROD_COUNT CONS_COUNT COUNT\n";
+
+ seq_printf(file, hdr);
+ for (i = 0; i < mlxsw_pci_rdq_count(mlxsw_pci); i++) {
+ q = mlxsw_pci_rdq_get(mlxsw_pci, i);
+ spin_lock_bh(&q->lock);
+ seq_printf(file, "%3d %10d %10d %5d\n",
+ i, q->producer_counter, q->consumer_counter,
+ q->count);
+ spin_unlock_bh(&q->lock);
+ }
+ return 0;
+}
+
+static int mlxsw_pci_cq_init(struct mlxsw_pci *mlxsw_pci, char *mbox,
+ struct mlxsw_pci_queue *q)
+{
+ int i;
+ int err;
+
+ q->consumer_counter = 0;
+
+ for (i = 0; i < q->count; i++) {
+ char *elem = mlxsw_pci_queue_elem_get(q, i);
+
+ mlxsw_pci_cqe_owner_set(elem, 1);
+ }
+
+ mlxsw_cmd_mbox_sw2hw_cq_cv_set(mbox, 0); /* CQE ver 0 */
+ mlxsw_cmd_mbox_sw2hw_cq_c_eqn_set(mbox, MLXSW_PCI_EQ_COMP_NUM);
+ mlxsw_cmd_mbox_sw2hw_cq_oi_set(mbox, 0);
+ mlxsw_cmd_mbox_sw2hw_cq_st_set(mbox, 0);
+ mlxsw_cmd_mbox_sw2hw_cq_log_cq_size_set(mbox, ilog2(q->count));
+ for (i = 0; i < MLXSW_PCI_AQ_PAGES; i++) {
+ dma_addr_t mapaddr = __mlxsw_pci_queue_page_get(q, i);
+
+ mlxsw_cmd_mbox_sw2hw_cq_pa_set(mbox, i, mapaddr);
+ }
+ err = mlxsw_cmd_sw2hw_cq(mlxsw_pci->core, mbox, q->num);
+ if (err)
+ return err;
+ mlxsw_pci_queue_doorbell_consumer_ring(mlxsw_pci, q);
+ mlxsw_pci_queue_doorbell_arm_consumer_ring(mlxsw_pci, q);
+ return 0;
+}
+
+static void mlxsw_pci_cq_fini(struct mlxsw_pci *mlxsw_pci,
+ struct mlxsw_pci_queue *q)
+{
+ mlxsw_cmd_hw2sw_cq(mlxsw_pci->core, q->num);
+}
+
+static int mlxsw_pci_cq_dbg_read(struct seq_file *file, void *data)
+{
+ struct mlxsw_pci *mlxsw_pci = dev_get_drvdata(file->private);
+
+ struct mlxsw_pci_queue *q;
+ int i;
+ static const char hdr[] =
+ "NUM CONS_INDEX SDQ_COUNT RDQ_COUNT COUNT\n";
+
+ seq_printf(file, hdr);
+ for (i = 0; i < mlxsw_pci_cq_count(mlxsw_pci); i++) {
+ q = mlxsw_pci_cq_get(mlxsw_pci, i);
+ spin_lock_bh(&q->lock);
+ seq_printf(file, "%3d %10d %10d %10d %5d\n",
+ i, q->consumer_counter, q->u.cq.comp_sdq_count,
+ q->u.cq.comp_rdq_count, q->count);
+ spin_unlock_bh(&q->lock);
+ }
+ return 0;
+}
+
+static void mlxsw_pci_cqe_sdq_handle(struct mlxsw_pci *mlxsw_pci,
+ struct mlxsw_pci_queue *q,
+ u16 consumer_counter_limit,
+ char *cqe)
+{
+ struct pci_dev *pdev = mlxsw_pci->pdev;
+ struct mlxsw_pci_queue_elem_info *elem_info;
+ char *wqe;
+ struct sk_buff *skb;
+ int i;
+
+ spin_lock(&q->lock);
+ elem_info = mlxsw_pci_queue_elem_info_consumer_get(q);
+ skb = elem_info->u.sdq.skb;
+ wqe = elem_info->elem;
+ for (i = 0; i < MLXSW_PCI_WQE_SG_ENTRIES; i++)
+ mlxsw_pci_wqe_frag_unmap(mlxsw_pci, wqe, i, DMA_TO_DEVICE);
+ dev_kfree_skb_any(skb);
+ elem_info->u.sdq.skb = NULL;
+
+ if (q->consumer_counter++ != consumer_counter_limit)
+ dev_dbg_ratelimited(&pdev->dev, "Consumer counter does not match limit in SDQ\n");
+ spin_unlock(&q->lock);
+}
+
+static void mlxsw_pci_cqe_rdq_handle(struct mlxsw_pci *mlxsw_pci,
+ struct mlxsw_pci_queue *q,
+ u16 consumer_counter_limit,
+ char *cqe)
+{
+ struct pci_dev *pdev = mlxsw_pci->pdev;
+ struct mlxsw_pci_queue_elem_info *elem_info;
+ char *wqe;
+ struct sk_buff *skb;
+ struct mlxsw_rx_info rx_info;
+ u16 byte_count;
+ int err;
+
+ elem_info = mlxsw_pci_queue_elem_info_consumer_get(q);
+ skb = elem_info->u.sdq.skb;
+ if (!skb)
+ return;
+ wqe = elem_info->elem;
+ mlxsw_pci_wqe_frag_unmap(mlxsw_pci, wqe, 0, DMA_FROM_DEVICE);
+
+ if (q->consumer_counter++ != consumer_counter_limit)
+ dev_dbg_ratelimited(&pdev->dev, "Consumer counter does not match limit in RDQ\n");
+
+ /* We do not support lag now */
+ if (mlxsw_pci_cqe_lag_get(cqe))
+ goto drop;
+
+ rx_info.sys_port = mlxsw_pci_cqe_system_port_get(cqe);
+ rx_info.trap_id = mlxsw_pci_cqe_trap_id_get(cqe);
+
+ byte_count = mlxsw_pci_cqe_byte_count_get(cqe);
+ if (mlxsw_pci_cqe_crc_get(cqe))
+ byte_count -= ETH_FCS_LEN;
+ skb_put(skb, byte_count);
+ mlxsw_core_skb_receive(mlxsw_pci->core, skb, &rx_info);
+
+put_new_skb:
+ memset(wqe, 0, q->elem_size);
+ err = mlxsw_pci_rdq_skb_alloc(mlxsw_pci, elem_info);
+ if (err)
+ dev_dbg_ratelimited(&pdev->dev, "Failed to alloc skb for RDQ\n");
+ /* Everything is set up, ring doorbell to pass elem to HW */
+ q->producer_counter++;
+ mlxsw_pci_queue_doorbell_producer_ring(mlxsw_pci, q);
+ return;
+
+drop:
+ dev_kfree_skb_any(skb);
+ goto put_new_skb;
+}
+
+static char *mlxsw_pci_cq_sw_cqe_get(struct mlxsw_pci_queue *q)
+{
+ return mlxsw_pci_queue_sw_elem_get(q, mlxsw_pci_cqe_owner_get);
+}
+
+static void mlxsw_pci_cq_tasklet(unsigned long data)
+{
+ struct mlxsw_pci_queue *q = (struct mlxsw_pci_queue *) data;
+ struct mlxsw_pci *mlxsw_pci = q->pci;
+ char *cqe;
+ int items = 0;
+ int credits = q->count >> 1;
+
+ while ((cqe = mlxsw_pci_cq_sw_cqe_get(q))) {
+ u16 wqe_counter = mlxsw_pci_cqe_wqe_counter_get(cqe);
+ u8 sendq = mlxsw_pci_cqe_sr_get(cqe);
+ u8 dqn = mlxsw_pci_cqe_dqn_get(cqe);
+
+ if (sendq) {
+ struct mlxsw_pci_queue *sdq;
+
+ sdq = mlxsw_pci_sdq_get(mlxsw_pci, dqn);
+ mlxsw_pci_cqe_sdq_handle(mlxsw_pci, sdq,
+ wqe_counter, cqe);
+ q->u.cq.comp_sdq_count++;
+ } else {
+ struct mlxsw_pci_queue *rdq;
+
+ rdq = mlxsw_pci_rdq_get(mlxsw_pci, dqn);
+ mlxsw_pci_cqe_rdq_handle(mlxsw_pci, rdq,
+ wqe_counter, cqe);
+ q->u.cq.comp_rdq_count++;
+ }
+ if (++items == credits)
+ break;
+ }
+ if (items) {
+ mlxsw_pci_queue_doorbell_consumer_ring(mlxsw_pci, q);
+ mlxsw_pci_queue_doorbell_arm_consumer_ring(mlxsw_pci, q);
+ }
+}
+
+static int mlxsw_pci_eq_init(struct mlxsw_pci *mlxsw_pci, char *mbox,
+ struct mlxsw_pci_queue *q)
+{
+ int i;
+ int err;
+
+ q->consumer_counter = 0;
+
+ for (i = 0; i < q->count; i++) {
+ char *elem = mlxsw_pci_queue_elem_get(q, i);
+
+ mlxsw_pci_eqe_owner_set(elem, 1);
+ }
+
+ mlxsw_cmd_mbox_sw2hw_eq_int_msix_set(mbox, 1); /* MSI-X used */
+ mlxsw_cmd_mbox_sw2hw_eq_oi_set(mbox, 0);
+ mlxsw_cmd_mbox_sw2hw_eq_st_set(mbox, 1); /* armed */
+ mlxsw_cmd_mbox_sw2hw_eq_log_eq_size_set(mbox, ilog2(q->count));
+ for (i = 0; i < MLXSW_PCI_AQ_PAGES; i++) {
+ dma_addr_t mapaddr = __mlxsw_pci_queue_page_get(q, i);
+
+ mlxsw_cmd_mbox_sw2hw_eq_pa_set(mbox, i, mapaddr);
+ }
+ err = mlxsw_cmd_sw2hw_eq(mlxsw_pci->core, mbox, q->num);
+ if (err)
+ return err;
+ mlxsw_pci_queue_doorbell_consumer_ring(mlxsw_pci, q);
+ mlxsw_pci_queue_doorbell_arm_consumer_ring(mlxsw_pci, q);
+ return 0;
+}
+
+static void mlxsw_pci_eq_fini(struct mlxsw_pci *mlxsw_pci,
+ struct mlxsw_pci_queue *q)
+{
+ mlxsw_cmd_hw2sw_eq(mlxsw_pci->core, q->num);
+}
+
+static int mlxsw_pci_eq_dbg_read(struct seq_file *file, void *data)
+{
+ struct mlxsw_pci *mlxsw_pci = dev_get_drvdata(file->private);
+ struct mlxsw_pci_queue *q;
+ int i;
+ static const char hdr[] =
+ "NUM CONS_COUNT EV_CMD EV_COMP EV_OTHER COUNT\n";
+
+ seq_printf(file, hdr);
+ for (i = 0; i < mlxsw_pci_eq_count(mlxsw_pci); i++) {
+ q = mlxsw_pci_eq_get(mlxsw_pci, i);
+ spin_lock_bh(&q->lock);
+ seq_printf(file, "%3d %10d %10d %10d %10d %5d\n",
+ i, q->consumer_counter, q->u.eq.ev_cmd_count,
+ q->u.eq.ev_comp_count, q->u.eq.ev_other_count,
+ q->count);
+ spin_unlock_bh(&q->lock);
+ }
+ return 0;
+}
+
+static void mlxsw_pci_eq_cmd_event(struct mlxsw_pci *mlxsw_pci, char *eqe)
+{
+ mlxsw_pci->cmd.comp.status = mlxsw_pci_eqe_cmd_status_get(eqe);
+ mlxsw_pci->cmd.comp.out_param =
+ ((u64) mlxsw_pci_eqe_cmd_out_param_h_get(eqe)) << 32 |
+ mlxsw_pci_eqe_cmd_out_param_l_get(eqe);
+ mlxsw_pci->cmd.wait_done = true;
+ wake_up(&mlxsw_pci->cmd.wait);
+}
+
+static char *mlxsw_pci_eq_sw_eqe_get(struct mlxsw_pci_queue *q)
+{
+ return mlxsw_pci_queue_sw_elem_get(q, mlxsw_pci_eqe_owner_get);
+}
+
+static void mlxsw_pci_eq_tasklet(unsigned long data)
+{
+ struct mlxsw_pci_queue *q = (struct mlxsw_pci_queue *) data;
+ struct mlxsw_pci *mlxsw_pci = q->pci;
+ u8 cq_count = mlxsw_pci_cq_count(mlxsw_pci);
+ unsigned long active_cqns[BITS_TO_LONGS(MLXSW_PCI_CQS_MAX)];
+ char *eqe;
+ u8 cqn;
+ bool cq_handle = false;
+ int items = 0;
+ int credits = q->count >> 1;
+
+ memset(&active_cqns, 0, sizeof(active_cqns));
+
+ while ((eqe = mlxsw_pci_eq_sw_eqe_get(q))) {
+ u8 event_type = mlxsw_pci_eqe_event_type_get(eqe);
+
+ switch (event_type) {
+ case MLXSW_PCI_EQE_EVENT_TYPE_CMD:
+ mlxsw_pci_eq_cmd_event(mlxsw_pci, eqe);
+ q->u.eq.ev_cmd_count++;
+ break;
+ case MLXSW_PCI_EQE_EVENT_TYPE_COMP:
+ cqn = mlxsw_pci_eqe_cqn_get(eqe);
+ set_bit(cqn, active_cqns);
+ cq_handle = true;
+ q->u.eq.ev_comp_count++;
+ break;
+ default:
+ q->u.eq.ev_other_count++;
+ }
+ if (++items == credits)
+ break;
+ }
+ if (items) {
+ mlxsw_pci_queue_doorbell_consumer_ring(mlxsw_pci, q);
+ mlxsw_pci_queue_doorbell_arm_consumer_ring(mlxsw_pci, q);
+ }
+
+ if (!cq_handle)
+ return;
+ for_each_set_bit(cqn, active_cqns, cq_count) {
+ q = mlxsw_pci_cq_get(mlxsw_pci, cqn);
+ mlxsw_pci_queue_tasklet_schedule(q);
+ }
+}
+
+struct mlxsw_pci_queue_ops {
+ const char *name;
+ enum mlxsw_pci_queue_type type;
+ int (*init)(struct mlxsw_pci *mlxsw_pci, char *mbox,
+ struct mlxsw_pci_queue *q);
+ void (*fini)(struct mlxsw_pci *mlxsw_pci,
+ struct mlxsw_pci_queue *q);
+ void (*tasklet)(unsigned long data);
+ int (*dbg_read)(struct seq_file *s, void *data);
+ u16 elem_count;
+ u8 elem_size;
+};
+
+static const struct mlxsw_pci_queue_ops mlxsw_pci_sdq_ops = {
+ .type = MLXSW_PCI_QUEUE_TYPE_SDQ,
+ .init = mlxsw_pci_sdq_init,
+ .fini = mlxsw_pci_sdq_fini,
+ .dbg_read = mlxsw_pci_sdq_dbg_read,
+ .elem_count = MLXSW_PCI_WQE_COUNT,
+ .elem_size = MLXSW_PCI_WQE_SIZE,
+};
+
+static const struct mlxsw_pci_queue_ops mlxsw_pci_rdq_ops = {
+ .type = MLXSW_PCI_QUEUE_TYPE_RDQ,
+ .init = mlxsw_pci_rdq_init,
+ .fini = mlxsw_pci_rdq_fini,
+ .dbg_read = mlxsw_pci_rdq_dbg_read,
+ .elem_count = MLXSW_PCI_WQE_COUNT,
+ .elem_size = MLXSW_PCI_WQE_SIZE
+};
+
+static const struct mlxsw_pci_queue_ops mlxsw_pci_cq_ops = {
+ .type = MLXSW_PCI_QUEUE_TYPE_CQ,
+ .init = mlxsw_pci_cq_init,
+ .fini = mlxsw_pci_cq_fini,
+ .tasklet = mlxsw_pci_cq_tasklet,
+ .dbg_read = mlxsw_pci_cq_dbg_read,
+ .elem_count = MLXSW_PCI_CQE_COUNT,
+ .elem_size = MLXSW_PCI_CQE_SIZE
+};
+
+static const struct mlxsw_pci_queue_ops mlxsw_pci_eq_ops = {
+ .type = MLXSW_PCI_QUEUE_TYPE_EQ,
+ .init = mlxsw_pci_eq_init,
+ .fini = mlxsw_pci_eq_fini,
+ .tasklet = mlxsw_pci_eq_tasklet,
+ .dbg_read = mlxsw_pci_eq_dbg_read,
+ .elem_count = MLXSW_PCI_EQE_COUNT,
+ .elem_size = MLXSW_PCI_EQE_SIZE
+};
+
+static int mlxsw_pci_queue_init(struct mlxsw_pci *mlxsw_pci, char *mbox,
+ const struct mlxsw_pci_queue_ops *q_ops,
+ struct mlxsw_pci_queue *q, u8 q_num)
+{
+ struct mlxsw_pci_mem_item *mem_item = &q->mem_item;
+ int i;
+ int err;
+
+ spin_lock_init(&q->lock);
+ q->num = q_num;
+ q->count = q_ops->elem_count;
+ q->elem_size = q_ops->elem_size;
+ q->type = q_ops->type;
+ q->pci = mlxsw_pci;
+
+ if (q_ops->tasklet)
+ tasklet_init(&q->tasklet, q_ops->tasklet, (unsigned long) q);
+
+ mem_item->size = MLXSW_PCI_AQ_SIZE;
+ mem_item->buf = pci_alloc_consistent(mlxsw_pci->pdev,
+ mem_item->size,
+ &mem_item->mapaddr);
+ if (!mem_item->buf)
+ return -ENOMEM;
+ memset(mem_item->buf, 0, mem_item->size);
+
+ q->elem_info = kcalloc(q->count, sizeof(*q->elem_info), GFP_KERNEL);
+ if (!q->elem_info) {
+ err = -ENOMEM;
+ goto err_elem_info_alloc;
+ }
+
+ /* Initialize dma mapped elements info elem_info for
+ * future easy access.
+ */
+ for (i = 0; i < q->count; i++) {
+ struct mlxsw_pci_queue_elem_info *elem_info;
+
+ elem_info = mlxsw_pci_queue_elem_info_get(q, i);
+ elem_info->elem =
+ __mlxsw_pci_queue_elem_get(q, q_ops->elem_size, i);
+ }
+
+ mlxsw_cmd_mbox_zero(mbox);
+ err = q_ops->init(mlxsw_pci, mbox, q);
+ if (err)
+ goto err_q_ops_init;
+ return 0;
+
+err_q_ops_init:
+ kfree(q->elem_info);
+err_elem_info_alloc:
+ pci_free_consistent(mlxsw_pci->pdev, mem_item->size,
+ mem_item->buf, mem_item->mapaddr);
+ return err;
+}
+
+static void mlxsw_pci_queue_fini(struct mlxsw_pci *mlxsw_pci,
+ const struct mlxsw_pci_queue_ops *q_ops,
+ struct mlxsw_pci_queue *q)
+{
+ struct mlxsw_pci_mem_item *mem_item = &q->mem_item;
+
+ q_ops->fini(mlxsw_pci, q);
+ kfree(q->elem_info);
+ pci_free_consistent(mlxsw_pci->pdev, mem_item->size,
+ mem_item->buf, mem_item->mapaddr);
+}
+
+static int mlxsw_pci_queue_group_init(struct mlxsw_pci *mlxsw_pci, char *mbox,
+ const struct mlxsw_pci_queue_ops *q_ops,
+ u8 num_qs)
+{
+ struct pci_dev *pdev = mlxsw_pci->pdev;
+ struct mlxsw_pci_queue_type_group *queue_group;
+ char tmp[16];
+ int i;
+ int err;
+
+ queue_group = mlxsw_pci_queue_type_group_get(mlxsw_pci, q_ops->type);
+ queue_group->q = kcalloc(num_qs, sizeof(*queue_group->q), GFP_KERNEL);
+ if (!queue_group->q)
+ return -ENOMEM;
+
+ for (i = 0; i < num_qs; i++) {
+ err = mlxsw_pci_queue_init(mlxsw_pci, mbox, q_ops,
+ &queue_group->q[i], i);
+ if (err)
+ goto err_queue_init;
+ }
+ queue_group->count = num_qs;
+
+ sprintf(tmp, "%s_stats", mlxsw_pci_queue_type_str(q_ops->type));
+ debugfs_create_devm_seqfile(&pdev->dev, tmp, mlxsw_pci->dbg_dir,
+ q_ops->dbg_read);
+
+ return 0;
+
+err_queue_init:
+ for (i--; i >= 0; i--)
+ mlxsw_pci_queue_fini(mlxsw_pci, q_ops, &queue_group->q[i]);
+ kfree(queue_group->q);
+ return err;
+}
+
+static void mlxsw_pci_queue_group_fini(struct mlxsw_pci *mlxsw_pci,
+ const struct mlxsw_pci_queue_ops *q_ops)
+{
+ struct mlxsw_pci_queue_type_group *queue_group;
+ int i;
+
+ queue_group = mlxsw_pci_queue_type_group_get(mlxsw_pci, q_ops->type);
+ for (i = 0; i < queue_group->count; i++)
+ mlxsw_pci_queue_fini(mlxsw_pci, q_ops, &queue_group->q[i]);
+ kfree(queue_group->q);
+}
+
+static int mlxsw_pci_aqs_init(struct mlxsw_pci *mlxsw_pci, char *mbox)
+{
+ struct pci_dev *pdev = mlxsw_pci->pdev;
+ u8 num_sdqs;
+ u8 sdq_log2sz;
+ u8 num_rdqs;
+ u8 rdq_log2sz;
+ u8 num_cqs;
+ u8 cq_log2sz;
+ u8 num_eqs;
+ u8 eq_log2sz;
+ int err;
+
+ mlxsw_cmd_mbox_zero(mbox);
+ err = mlxsw_cmd_query_aq_cap(mlxsw_pci->core, mbox);
+ if (err)
+ return err;
+
+ num_sdqs = mlxsw_cmd_mbox_query_aq_cap_max_num_sdqs_get(mbox);
+ sdq_log2sz = mlxsw_cmd_mbox_query_aq_cap_log_max_sdq_sz_get(mbox);
+ num_rdqs = mlxsw_cmd_mbox_query_aq_cap_max_num_rdqs_get(mbox);
+ rdq_log2sz = mlxsw_cmd_mbox_query_aq_cap_log_max_rdq_sz_get(mbox);
+ num_cqs = mlxsw_cmd_mbox_query_aq_cap_max_num_cqs_get(mbox);
+ cq_log2sz = mlxsw_cmd_mbox_query_aq_cap_log_max_cq_sz_get(mbox);
+ num_eqs = mlxsw_cmd_mbox_query_aq_cap_max_num_eqs_get(mbox);
+ eq_log2sz = mlxsw_cmd_mbox_query_aq_cap_log_max_eq_sz_get(mbox);
+
+ if (num_sdqs + num_rdqs > num_cqs ||
+ num_cqs > MLXSW_PCI_CQS_MAX || num_eqs != MLXSW_PCI_EQS_COUNT) {
+ dev_err(&pdev->dev, "Unsupported number of queues\n");
+ return -EINVAL;
+ }
+
+ if ((1 << sdq_log2sz != MLXSW_PCI_WQE_COUNT) ||
+ (1 << rdq_log2sz != MLXSW_PCI_WQE_COUNT) ||
+ (1 << cq_log2sz != MLXSW_PCI_CQE_COUNT) ||
+ (1 << eq_log2sz != MLXSW_PCI_EQE_COUNT)) {
+ dev_err(&pdev->dev, "Unsupported number of async queue descriptors\n");
+ return -EINVAL;
+ }
+
+ err = mlxsw_pci_queue_group_init(mlxsw_pci, mbox, &mlxsw_pci_eq_ops,
+ num_eqs);
+ if (err) {
+ dev_err(&pdev->dev, "Failed to initialize event queues\n");
+ return err;
+ }
+
+ err = mlxsw_pci_queue_group_init(mlxsw_pci, mbox, &mlxsw_pci_cq_ops,
+ num_cqs);
+ if (err) {
+ dev_err(&pdev->dev, "Failed to initialize completion queues\n");
+ goto err_cqs_init;
+ }
+
+ err = mlxsw_pci_queue_group_init(mlxsw_pci, mbox, &mlxsw_pci_sdq_ops,
+ num_sdqs);
+ if (err) {
+ dev_err(&pdev->dev, "Failed to initialize send descriptor queues\n");
+ goto err_sdqs_init;
+ }
+
+ err = mlxsw_pci_queue_group_init(mlxsw_pci, mbox, &mlxsw_pci_rdq_ops,
+ num_rdqs);
+ if (err) {
+ dev_err(&pdev->dev, "Failed to initialize receive descriptor queues\n");
+ goto err_rdqs_init;
+ }
+
+ /* We have to poll in command interface until queues are initialized */
+ mlxsw_pci->cmd.nopoll = true;
+ return 0;
+
+err_rdqs_init:
+ mlxsw_pci_queue_group_fini(mlxsw_pci, &mlxsw_pci_sdq_ops);
+err_sdqs_init:
+ mlxsw_pci_queue_group_fini(mlxsw_pci, &mlxsw_pci_cq_ops);
+err_cqs_init:
+ mlxsw_pci_queue_group_fini(mlxsw_pci, &mlxsw_pci_eq_ops);
+ return err;
+}
+
+static void mlxsw_pci_aqs_fini(struct mlxsw_pci *mlxsw_pci)
+{
+ mlxsw_pci->cmd.nopoll = false;
+ mlxsw_pci_queue_group_fini(mlxsw_pci, &mlxsw_pci_rdq_ops);
+ mlxsw_pci_queue_group_fini(mlxsw_pci, &mlxsw_pci_sdq_ops);
+ mlxsw_pci_queue_group_fini(mlxsw_pci, &mlxsw_pci_cq_ops);
+ mlxsw_pci_queue_group_fini(mlxsw_pci, &mlxsw_pci_eq_ops);
+}
+
+static void
+mlxsw_pci_config_profile_swid_config(struct mlxsw_pci *mlxsw_pci,
+ char *mbox, int index,
+ const struct mlxsw_swid_config *swid)
+{
+ u8 mask = 0;
+
+ if (swid->used_type) {
+ mlxsw_cmd_mbox_config_profile_swid_config_type_set(
+ mbox, index, swid->type);
+ mask |= 1;
+ }
+ if (swid->used_properties) {
+ mlxsw_cmd_mbox_config_profile_swid_config_properties_set(
+ mbox, index, swid->properties);
+ mask |= 2;
+ }
+ mlxsw_cmd_mbox_config_profile_swid_config_mask_set(mbox, index, mask);
+}
+
+static int mlxsw_pci_config_profile(struct mlxsw_pci *mlxsw_pci, char *mbox,
+ const struct mlxsw_config_profile *profile)
+{
+ int i;
+
+ mlxsw_cmd_mbox_zero(mbox);
+
+ if (profile->used_max_vepa_channels) {
+ mlxsw_cmd_mbox_config_profile_set_max_vepa_channels_set(
+ mbox, 1);
+ mlxsw_cmd_mbox_config_profile_max_vepa_channels_set(
+ mbox, profile->max_vepa_channels);
+ }
+ if (profile->used_max_lag) {
+ mlxsw_cmd_mbox_config_profile_set_max_lag_set(
+ mbox, 1);
+ mlxsw_cmd_mbox_config_profile_max_lag_set(
+ mbox, profile->max_lag);
+ }
+ if (profile->used_max_port_per_lag) {
+ mlxsw_cmd_mbox_config_profile_set_max_port_per_lag_set(
+ mbox, 1);
+ mlxsw_cmd_mbox_config_profile_max_port_per_lag_set(
+ mbox, profile->max_port_per_lag);
+ }
+ if (profile->used_max_mid) {
+ mlxsw_cmd_mbox_config_profile_set_max_mid_set(
+ mbox, 1);
+ mlxsw_cmd_mbox_config_profile_max_mid_set(
+ mbox, profile->max_mid);
+ }
+ if (profile->used_max_pgt) {
+ mlxsw_cmd_mbox_config_profile_set_max_pgt_set(
+ mbox, 1);
+ mlxsw_cmd_mbox_config_profile_max_pgt_set(
+ mbox, profile->max_pgt);
+ }
+ if (profile->used_max_system_port) {
+ mlxsw_cmd_mbox_config_profile_set_max_system_port_set(
+ mbox, 1);
+ mlxsw_cmd_mbox_config_profile_max_system_port_set(
+ mbox, profile->max_system_port);
+ }
+ if (profile->used_max_vlan_groups) {
+ mlxsw_cmd_mbox_config_profile_set_max_vlan_groups_set(
+ mbox, 1);
+ mlxsw_cmd_mbox_config_profile_max_vlan_groups_set(
+ mbox, profile->max_vlan_groups);
+ }
+ if (profile->used_max_regions) {
+ mlxsw_cmd_mbox_config_profile_set_max_regions_set(
+ mbox, 1);
+ mlxsw_cmd_mbox_config_profile_max_regions_set(
+ mbox, profile->max_regions);
+ }
+ if (profile->used_flood_tables) {
+ mlxsw_cmd_mbox_config_profile_set_flood_tables_set(
+ mbox, 1);
+ mlxsw_cmd_mbox_config_profile_max_flood_tables_set(
+ mbox, profile->max_flood_tables);
+ mlxsw_cmd_mbox_config_profile_max_vid_flood_tables_set(
+ mbox, profile->max_vid_flood_tables);
+ mlxsw_cmd_mbox_config_profile_max_fid_offset_flood_tables_set(
+ mbox, profile->max_fid_offset_flood_tables);
+ mlxsw_cmd_mbox_config_profile_fid_offset_flood_table_size_set(
+ mbox, profile->fid_offset_flood_table_size);
+ mlxsw_cmd_mbox_config_profile_max_fid_flood_tables_set(
+ mbox, profile->max_fid_flood_tables);
+ mlxsw_cmd_mbox_config_profile_fid_flood_table_size_set(
+ mbox, profile->fid_flood_table_size);
+ }
+ if (profile->used_flood_mode) {
+ mlxsw_cmd_mbox_config_profile_set_flood_mode_set(
+ mbox, 1);
+ mlxsw_cmd_mbox_config_profile_flood_mode_set(
+ mbox, profile->flood_mode);
+ }
+ if (profile->used_max_ib_mc) {
+ mlxsw_cmd_mbox_config_profile_set_max_ib_mc_set(
+ mbox, 1);
+ mlxsw_cmd_mbox_config_profile_max_ib_mc_set(
+ mbox, profile->max_ib_mc);
+ }
+ if (profile->used_max_pkey) {
+ mlxsw_cmd_mbox_config_profile_set_max_pkey_set(
+ mbox, 1);
+ mlxsw_cmd_mbox_config_profile_max_pkey_set(
+ mbox, profile->max_pkey);
+ }
+ if (profile->used_ar_sec) {
+ mlxsw_cmd_mbox_config_profile_set_ar_sec_set(
+ mbox, 1);
+ mlxsw_cmd_mbox_config_profile_ar_sec_set(
+ mbox, profile->ar_sec);
+ }
+ if (profile->used_adaptive_routing_group_cap) {
+ mlxsw_cmd_mbox_config_profile_set_adaptive_routing_group_cap_set(
+ mbox, 1);
+ mlxsw_cmd_mbox_config_profile_adaptive_routing_group_cap_set(
+ mbox, profile->adaptive_routing_group_cap);
+ }
+
+ for (i = 0; i < MLXSW_CONFIG_PROFILE_SWID_COUNT; i++)
+ mlxsw_pci_config_profile_swid_config(mlxsw_pci, mbox, i,
+ &profile->swid_config[i]);
+
+ return mlxsw_cmd_config_profile_set(mlxsw_pci->core, mbox);
+}
+
+static int mlxsw_pci_boardinfo(struct mlxsw_pci *mlxsw_pci, char *mbox)
+{
+ struct mlxsw_bus_info *bus_info = &mlxsw_pci->bus_info;
+ int err;
+
+ mlxsw_cmd_mbox_zero(mbox);
+ err = mlxsw_cmd_boardinfo(mlxsw_pci->core, mbox);
+ if (err)
+ return err;
+ mlxsw_cmd_mbox_boardinfo_vsd_memcpy_from(mbox, bus_info->vsd);
+ mlxsw_cmd_mbox_boardinfo_psid_memcpy_from(mbox, bus_info->psid);
+ return 0;
+}
+
+static int mlxsw_pci_fw_area_init(struct mlxsw_pci *mlxsw_pci, char *mbox,
+ u16 num_pages)
+{
+ struct mlxsw_pci_mem_item *mem_item;
+ int nent = 0;
+ int i;
+ int err;
+
+ mlxsw_pci->fw_area.items = kcalloc(num_pages, sizeof(*mem_item),
+ GFP_KERNEL);
+ if (!mlxsw_pci->fw_area.items)
+ return -ENOMEM;
+ mlxsw_pci->fw_area.count = num_pages;
+
+ mlxsw_cmd_mbox_zero(mbox);
+ for (i = 0; i < num_pages; i++) {
+ mem_item = &mlxsw_pci->fw_area.items[i];
+
+ mem_item->size = MLXSW_PCI_PAGE_SIZE;
+ mem_item->buf = pci_alloc_consistent(mlxsw_pci->pdev,
+ mem_item->size,
+ &mem_item->mapaddr);
+ if (!mem_item->buf) {
+ err = -ENOMEM;
+ goto err_alloc;
+ }
+ mlxsw_cmd_mbox_map_fa_pa_set(mbox, nent, mem_item->mapaddr);
+ mlxsw_cmd_mbox_map_fa_log2size_set(mbox, nent, 0); /* 1 page */
+ if (++nent == MLXSW_CMD_MAP_FA_VPM_ENTRIES_MAX) {
+ err = mlxsw_cmd_map_fa(mlxsw_pci->core, mbox, nent);
+ if (err)
+ goto err_cmd_map_fa;
+ nent = 0;
+ mlxsw_cmd_mbox_zero(mbox);
+ }
+ }
+
+ if (nent) {
+ err = mlxsw_cmd_map_fa(mlxsw_pci->core, mbox, nent);
+ if (err)
+ goto err_cmd_map_fa;
+ }
+
+ return 0;
+
+err_cmd_map_fa:
+err_alloc:
+ for (i--; i >= 0; i--) {
+ mem_item = &mlxsw_pci->fw_area.items[i];
+
+ pci_free_consistent(mlxsw_pci->pdev, mem_item->size,
+ mem_item->buf, mem_item->mapaddr);
+ }
+ kfree(mlxsw_pci->fw_area.items);
+ return err;
+}
+
+static void mlxsw_pci_fw_area_fini(struct mlxsw_pci *mlxsw_pci)
+{
+ struct mlxsw_pci_mem_item *mem_item;
+ int i;
+
+ mlxsw_cmd_unmap_fa(mlxsw_pci->core);
+
+ for (i = 0; i < mlxsw_pci->fw_area.count; i++) {
+ mem_item = &mlxsw_pci->fw_area.items[i];
+
+ pci_free_consistent(mlxsw_pci->pdev, mem_item->size,
+ mem_item->buf, mem_item->mapaddr);
+ }
+ kfree(mlxsw_pci->fw_area.items);
+}
+
+static irqreturn_t mlxsw_pci_eq_irq_handler(int irq, void *dev_id)
+{
+ struct mlxsw_pci *mlxsw_pci = dev_id;
+ struct mlxsw_pci_queue *q;
+ int i;
+
+ for (i = 0; i < MLXSW_PCI_EQS_COUNT; i++) {
+ q = mlxsw_pci_eq_get(mlxsw_pci, i);
+ mlxsw_pci_queue_tasklet_schedule(q);
+ }
+ return IRQ_HANDLED;
+}
+
+static int mlxsw_pci_mbox_alloc(struct mlxsw_pci *mlxsw_pci,
+ struct mlxsw_pci_mem_item *mbox)
+{
+ struct pci_dev *pdev = mlxsw_pci->pdev;
+ int err = 0;
+
+ mbox->size = MLXSW_CMD_MBOX_SIZE;
+ mbox->buf = pci_alloc_consistent(pdev, MLXSW_CMD_MBOX_SIZE,
+ &mbox->mapaddr);
+ if (!mbox->buf) {
+ dev_err(&pdev->dev, "Failed allocating memory for mailbox\n");
+ err = -ENOMEM;
+ }
+
+ return err;
+}
+
+static void mlxsw_pci_mbox_free(struct mlxsw_pci *mlxsw_pci,
+ struct mlxsw_pci_mem_item *mbox)
+{
+ struct pci_dev *pdev = mlxsw_pci->pdev;
+
+ pci_free_consistent(pdev, MLXSW_CMD_MBOX_SIZE, mbox->buf,
+ mbox->mapaddr);
+}
+
+static int mlxsw_pci_init(void *bus_priv, struct mlxsw_core *mlxsw_core,
+ const struct mlxsw_config_profile *profile)
+{
+ struct mlxsw_pci *mlxsw_pci = bus_priv;
+ struct pci_dev *pdev = mlxsw_pci->pdev;
+ char *mbox;
+ u16 num_pages;
+ int err;
+
+ mutex_init(&mlxsw_pci->cmd.lock);
+ init_waitqueue_head(&mlxsw_pci->cmd.wait);
+
+ mlxsw_pci->core = mlxsw_core;
+
+ mbox = mlxsw_cmd_mbox_alloc();
+ if (!mbox)
+ return -ENOMEM;
+
+ err = mlxsw_pci_mbox_alloc(mlxsw_pci, &mlxsw_pci->cmd.in_mbox);
+ if (err)
+ goto mbox_put;
+
+ err = mlxsw_pci_mbox_alloc(mlxsw_pci, &mlxsw_pci->cmd.out_mbox);
+ if (err)
+ goto err_out_mbox_alloc;
+
+ err = mlxsw_cmd_query_fw(mlxsw_core, mbox);
+ if (err)
+ goto err_query_fw;
+
+ mlxsw_pci->bus_info.fw_rev.major =
+ mlxsw_cmd_mbox_query_fw_fw_rev_major_get(mbox);
+ mlxsw_pci->bus_info.fw_rev.minor =
+ mlxsw_cmd_mbox_query_fw_fw_rev_minor_get(mbox);
+ mlxsw_pci->bus_info.fw_rev.subminor =
+ mlxsw_cmd_mbox_query_fw_fw_rev_subminor_get(mbox);
+
+ if (mlxsw_cmd_mbox_query_fw_cmd_interface_rev_get(mbox) != 1) {
+ dev_err(&pdev->dev, "Unsupported cmd interface revision ID queried from hw\n");
+ err = -EINVAL;
+ goto err_iface_rev;
+ }
+ if (mlxsw_cmd_mbox_query_fw_doorbell_page_bar_get(mbox) != 0) {
+ dev_err(&pdev->dev, "Unsupported doorbell page bar queried from hw\n");
+ err = -EINVAL;
+ goto err_doorbell_page_bar;
+ }
+
+ mlxsw_pci->doorbell_offset =
+ mlxsw_cmd_mbox_query_fw_doorbell_page_offset_get(mbox);
+
+ num_pages = mlxsw_cmd_mbox_query_fw_fw_pages_get(mbox);
+ err = mlxsw_pci_fw_area_init(mlxsw_pci, mbox, num_pages);
+ if (err)
+ goto err_fw_area_init;
+
+ err = mlxsw_pci_boardinfo(mlxsw_pci, mbox);
+ if (err)
+ goto err_boardinfo;
+
+ err = mlxsw_pci_config_profile(mlxsw_pci, mbox, profile);
+ if (err)
+ goto err_config_profile;
+
+ err = mlxsw_pci_aqs_init(mlxsw_pci, mbox);
+ if (err)
+ goto err_aqs_init;
+
+ err = request_irq(mlxsw_pci->msix_entry.vector,
+ mlxsw_pci_eq_irq_handler, 0,
+ mlxsw_pci_driver_name, mlxsw_pci);
+ if (err) {
+ dev_err(&pdev->dev, "IRQ request failed\n");
+ goto err_request_eq_irq;
+ }
+
+ goto mbox_put;
+
+err_request_eq_irq:
+ mlxsw_pci_aqs_fini(mlxsw_pci);
+err_aqs_init:
+err_config_profile:
+err_boardinfo:
+ mlxsw_pci_fw_area_fini(mlxsw_pci);
+err_fw_area_init:
+err_doorbell_page_bar:
+err_iface_rev:
+err_query_fw:
+ mlxsw_pci_mbox_free(mlxsw_pci, &mlxsw_pci->cmd.out_mbox);
+err_out_mbox_alloc:
+ mlxsw_pci_mbox_free(mlxsw_pci, &mlxsw_pci->cmd.in_mbox);
+mbox_put:
+ mlxsw_cmd_mbox_free(mbox);
+ return err;
+}
+
+static void mlxsw_pci_fini(void *bus_priv)
+{
+ struct mlxsw_pci *mlxsw_pci = bus_priv;
+
+ free_irq(mlxsw_pci->msix_entry.vector, mlxsw_pci);
+ mlxsw_pci_aqs_fini(mlxsw_pci);
+ mlxsw_pci_fw_area_fini(mlxsw_pci);
+ mlxsw_pci_mbox_free(mlxsw_pci, &mlxsw_pci->cmd.out_mbox);
+ mlxsw_pci_mbox_free(mlxsw_pci, &mlxsw_pci->cmd.in_mbox);
+}
+
+static struct mlxsw_pci_queue *
+mlxsw_pci_sdq_pick(struct mlxsw_pci *mlxsw_pci,
+ const struct mlxsw_tx_info *tx_info)
+{
+ u8 sdqn = tx_info->local_port % mlxsw_pci_sdq_count(mlxsw_pci);
+
+ return mlxsw_pci_sdq_get(mlxsw_pci, sdqn);
+}
+
+static bool mlxsw_pci_skb_transmit_busy(void *bus_priv,
+ const struct mlxsw_tx_info *tx_info)
+{
+ struct mlxsw_pci *mlxsw_pci = bus_priv;
+ struct mlxsw_pci_queue *q = mlxsw_pci_sdq_pick(mlxsw_pci, tx_info);
+
+ return !mlxsw_pci_queue_elem_info_producer_get(q);
+}
+
+static int mlxsw_pci_skb_transmit(void *bus_priv, struct sk_buff *skb,
+ const struct mlxsw_tx_info *tx_info)
+{
+ struct mlxsw_pci *mlxsw_pci = bus_priv;
+ struct mlxsw_pci_queue *q;
+ struct mlxsw_pci_queue_elem_info *elem_info;
+ char *wqe;
+ int i;
+ int err;
+
+ if (skb_shinfo(skb)->nr_frags > MLXSW_PCI_WQE_SG_ENTRIES - 1) {
+ err = skb_linearize(skb);
+ if (err)
+ return err;
+ }
+
+ q = mlxsw_pci_sdq_pick(mlxsw_pci, tx_info);
+ spin_lock_bh(&q->lock);
+ elem_info = mlxsw_pci_queue_elem_info_producer_get(q);
+ if (!elem_info) {
+ /* queue is full */
+ err = -EAGAIN;
+ goto unlock;
+ }
+ elem_info->u.sdq.skb = skb;
+
+ wqe = elem_info->elem;
+ mlxsw_pci_wqe_c_set(wqe, 1); /* always report completion */
+ mlxsw_pci_wqe_lp_set(wqe, !!tx_info->is_emad);
+ mlxsw_pci_wqe_type_set(wqe, MLXSW_PCI_WQE_TYPE_ETHERNET);
+
+ err = mlxsw_pci_wqe_frag_map(mlxsw_pci, wqe, 0, skb->data,
+ skb_headlen(skb), DMA_TO_DEVICE);
+ if (err)
+ goto unlock;
+
+ for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
+ const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
+
+ err = mlxsw_pci_wqe_frag_map(mlxsw_pci, wqe, i + 1,
+ skb_frag_address(frag),
+ skb_frag_size(frag),
+ DMA_TO_DEVICE);
+ if (err)
+ goto unmap_frags;
+ }
+
+ /* Set unused sq entries byte count to zero. */
+ for (i++; i < MLXSW_PCI_WQE_SG_ENTRIES; i++)
+ mlxsw_pci_wqe_byte_count_set(wqe, i, 0);
+
+ /* Everything is set up, ring producer doorbell to get HW going */
+ q->producer_counter++;
+ mlxsw_pci_queue_doorbell_producer_ring(mlxsw_pci, q);
+
+ goto unlock;
+
+unmap_frags:
+ for (; i >= 0; i--)
+ mlxsw_pci_wqe_frag_unmap(mlxsw_pci, wqe, i, DMA_TO_DEVICE);
+unlock:
+ spin_unlock_bh(&q->lock);
+ return err;
+}
+
+static int mlxsw_pci_cmd_exec(void *bus_priv, u16 opcode, u8 opcode_mod,
+ u32 in_mod, bool out_mbox_direct,
+ char *in_mbox, size_t in_mbox_size,
+ char *out_mbox, size_t out_mbox_size,
+ u8 *p_status)
+{
+ struct mlxsw_pci *mlxsw_pci = bus_priv;
+ dma_addr_t in_mapaddr = mlxsw_pci->cmd.in_mbox.mapaddr;
+ dma_addr_t out_mapaddr = mlxsw_pci->cmd.out_mbox.mapaddr;
+ bool evreq = mlxsw_pci->cmd.nopoll;
+ unsigned long timeout = msecs_to_jiffies(MLXSW_PCI_CIR_TIMEOUT_MSECS);
+ bool *p_wait_done = &mlxsw_pci->cmd.wait_done;
+ int err;
+
+ *p_status = MLXSW_CMD_STATUS_OK;
+
+ err = mutex_lock_interruptible(&mlxsw_pci->cmd.lock);
+ if (err)
+ return err;
+
+ if (in_mbox)
+ memcpy(mlxsw_pci->cmd.in_mbox.buf, in_mbox, in_mbox_size);
+ mlxsw_pci_write32(mlxsw_pci, CIR_IN_PARAM_HI, upper_32_bits(in_mapaddr));
+ mlxsw_pci_write32(mlxsw_pci, CIR_IN_PARAM_LO, lower_32_bits(in_mapaddr));
+
+ mlxsw_pci_write32(mlxsw_pci, CIR_OUT_PARAM_HI, upper_32_bits(out_mapaddr));
+ mlxsw_pci_write32(mlxsw_pci, CIR_OUT_PARAM_LO, lower_32_bits(out_mapaddr));
+
+ mlxsw_pci_write32(mlxsw_pci, CIR_IN_MODIFIER, in_mod);
+ mlxsw_pci_write32(mlxsw_pci, CIR_TOKEN, 0);
+
+ *p_wait_done = false;
+
+ wmb(); /* all needs to be written before we write control register */
+ mlxsw_pci_write32(mlxsw_pci, CIR_CTRL,
+ MLXSW_PCI_CIR_CTRL_GO_BIT |
+ (evreq ? MLXSW_PCI_CIR_CTRL_EVREQ_BIT : 0) |
+ (opcode_mod << MLXSW_PCI_CIR_CTRL_OPCODE_MOD_SHIFT) |
+ opcode);
+
+ if (!evreq) {
+ unsigned long end;
+
+ end = jiffies + timeout;
+ do {
+ u32 ctrl = mlxsw_pci_read32(mlxsw_pci, CIR_CTRL);
+
+ if (!(ctrl & MLXSW_PCI_CIR_CTRL_GO_BIT)) {
+ *p_wait_done = true;
+ *p_status = ctrl >> MLXSW_PCI_CIR_CTRL_STATUS_SHIFT;
+ break;
+ }
+ cond_resched();
+ } while (time_before(jiffies, end));
+ } else {
+ wait_event_timeout(mlxsw_pci->cmd.wait, *p_wait_done, timeout);
+ *p_status = mlxsw_pci->cmd.comp.status;
+ }
+
+ err = 0;
+ if (*p_wait_done) {
+ if (*p_status)
+ err = -EIO;
+ } else {
+ err = -ETIMEDOUT;
+ }
+
+ if (!err && out_mbox && out_mbox_direct) {
+ /* Some commands don't use output param as address to mailbox
+ * but they store output directly into registers. In that case,
+ * copy registers into mbox buffer.
+ */
+ __be32 tmp;
+
+ if (!evreq) {
+ tmp = cpu_to_be32(mlxsw_pci_read32(mlxsw_pci,
+ CIR_OUT_PARAM_HI));
+ memcpy(out_mbox, &tmp, sizeof(tmp));
+ tmp = cpu_to_be32(mlxsw_pci_read32(mlxsw_pci,
+ CIR_OUT_PARAM_LO));
+ memcpy(out_mbox + sizeof(tmp), &tmp, sizeof(tmp));
+ }
+ } else if (!err && out_mbox) {
+ memcpy(out_mbox, mlxsw_pci->cmd.out_mbox.buf, out_mbox_size);
+ }
+
+ mutex_unlock(&mlxsw_pci->cmd.lock);
+
+ return err;
+}
+
+static const struct mlxsw_bus mlxsw_pci_bus = {
+ .kind = "pci",
+ .init = mlxsw_pci_init,
+ .fini = mlxsw_pci_fini,
+ .skb_transmit_busy = mlxsw_pci_skb_transmit_busy,
+ .skb_transmit = mlxsw_pci_skb_transmit,
+ .cmd_exec = mlxsw_pci_cmd_exec,
+};
+
+static int mlxsw_pci_sw_reset(struct mlxsw_pci *mlxsw_pci)
+{
+ mlxsw_pci_write32(mlxsw_pci, SW_RESET, MLXSW_PCI_SW_RESET_RST_BIT);
+ /* Current firware does not let us know when the reset is done.
+ * So we just wait here for constant time and hope for the best.
+ */
+ msleep(MLXSW_PCI_SW_RESET_TIMEOUT_MSECS);
+ return 0;
+}
+
+static int mlxsw_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+ struct mlxsw_pci *mlxsw_pci;
+ int err;
+
+ mlxsw_pci = kzalloc(sizeof(*mlxsw_pci), GFP_KERNEL);
+ if (!mlxsw_pci)
+ return -ENOMEM;
+
+ err = pci_enable_device(pdev);
+ if (err) {
+ dev_err(&pdev->dev, "pci_enable_device failed\n");
+ goto err_pci_enable_device;
+ }
+
+ err = pci_request_regions(pdev, mlxsw_pci_driver_name);
+ if (err) {
+ dev_err(&pdev->dev, "pci_request_regions failed\n");
+ goto err_pci_request_regions;
+ }
+
+ err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
+ if (!err) {
+ err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
+ if (err) {
+ dev_err(&pdev->dev, "pci_set_consistent_dma_mask failed\n");
+ goto err_pci_set_dma_mask;
+ }
+ } else {
+ err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
+ if (err) {
+ dev_err(&pdev->dev, "pci_set_dma_mask failed\n");
+ goto err_pci_set_dma_mask;
+ }
+ }
+
+ if (pci_resource_len(pdev, 0) < MLXSW_PCI_BAR0_SIZE) {
+ dev_err(&pdev->dev, "invalid PCI region size\n");
+ err = -EINVAL;
+ goto err_pci_resource_len_check;
+ }
+
+ mlxsw_pci->hw_addr = ioremap(pci_resource_start(pdev, 0),
+ pci_resource_len(pdev, 0));
+ if (!mlxsw_pci->hw_addr) {
+ dev_err(&pdev->dev, "ioremap failed\n");
+ err = -EIO;
+ goto err_ioremap;
+ }
+ pci_set_master(pdev);
+
+ mlxsw_pci->pdev = pdev;
+ pci_set_drvdata(pdev, mlxsw_pci);
+
+ err = mlxsw_pci_sw_reset(mlxsw_pci);
+ if (err) {
+ dev_err(&pdev->dev, "Software reset failed\n");
+ goto err_sw_reset;
+ }
+
+ err = pci_enable_msix_exact(pdev, &mlxsw_pci->msix_entry, 1);
+ if (err) {
+ dev_err(&pdev->dev, "MSI-X init failed\n");
+ goto err_msix_init;
+ }
+
+ mlxsw_pci->bus_info.device_kind = mlxsw_pci_device_kind_get(id);
+ mlxsw_pci->bus_info.device_name = pci_name(mlxsw_pci->pdev);
+ mlxsw_pci->bus_info.dev = &pdev->dev;
+
+ mlxsw_pci->dbg_dir = debugfs_create_dir(mlxsw_pci->bus_info.device_name,
+ mlxsw_pci_dbg_root);
+ if (!mlxsw_pci->dbg_dir) {
+ dev_err(&pdev->dev, "Failed to create debugfs dir\n");
+ err = -ENOMEM;
+ goto err_dbg_create_dir;
+ }
+
+ err = mlxsw_core_bus_device_register(&mlxsw_pci->bus_info,
+ &mlxsw_pci_bus, mlxsw_pci);
+ if (err) {
+ dev_err(&pdev->dev, "cannot register bus device\n");
+ goto err_bus_device_register;
+ }
+
+ return 0;
+
+err_bus_device_register:
+ debugfs_remove_recursive(mlxsw_pci->dbg_dir);
+err_dbg_create_dir:
+ pci_disable_msix(mlxsw_pci->pdev);
+err_msix_init:
+err_sw_reset:
+ iounmap(mlxsw_pci->hw_addr);
+err_ioremap:
+err_pci_resource_len_check:
+err_pci_set_dma_mask:
+ pci_release_regions(pdev);
+err_pci_request_regions:
+ pci_disable_device(pdev);
+err_pci_enable_device:
+ kfree(mlxsw_pci);
+ return err;
+}
+
+static void mlxsw_pci_remove(struct pci_dev *pdev)
+{
+ struct mlxsw_pci *mlxsw_pci = pci_get_drvdata(pdev);
+
+ mlxsw_core_bus_device_unregister(mlxsw_pci->core);
+ debugfs_remove_recursive(mlxsw_pci->dbg_dir);
+ pci_disable_msix(mlxsw_pci->pdev);
+ iounmap(mlxsw_pci->hw_addr);
+ pci_release_regions(mlxsw_pci->pdev);
+ pci_disable_device(mlxsw_pci->pdev);
+ kfree(mlxsw_pci);
+}
+
+static struct pci_driver mlxsw_pci_driver = {
+ .name = mlxsw_pci_driver_name,
+ .id_table = mlxsw_pci_id_table,
+ .probe = mlxsw_pci_probe,
+ .remove = mlxsw_pci_remove,
+};
+
+static int __init mlxsw_pci_module_init(void)
+{
+ int err;
+
+ mlxsw_pci_dbg_root = debugfs_create_dir(mlxsw_pci_driver_name, NULL);
+ if (!mlxsw_pci_dbg_root)
+ return -ENOMEM;
+ err = pci_register_driver(&mlxsw_pci_driver);
+ if (err)
+ goto err_register_driver;
+ return 0;
+
+err_register_driver:
+ debugfs_remove_recursive(mlxsw_pci_dbg_root);
+ return err;
+}
+
+static void __exit mlxsw_pci_module_exit(void)
+{
+ pci_unregister_driver(&mlxsw_pci_driver);
+ debugfs_remove_recursive(mlxsw_pci_dbg_root);
+}
+
+module_init(mlxsw_pci_module_init);
+module_exit(mlxsw_pci_module_exit);
+
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_AUTHOR("Jiri Pirko <jiri@mellanox.com>");
+MODULE_DESCRIPTION("Mellanox switch PCI interface driver");
+MODULE_DEVICE_TABLE(pci, mlxsw_pci_id_table);
Code Review / kvmfornfv.git / blobdiff