/kernel-source/drivers/net/ethernet/mellanox/mlx5/core/main.c
C | 554 lines | 420 code | 100 blank | 34 comment | 45 complexity | 351edcc5f9aa2c618737d8de6b708d57 MD5 | raw file
- /*
- * Copyright (c) 2013, Mellanox Technologies inc. All rights reserved.
- *
- * This software is available to you under a choice of one of two
- * licenses. You may choose to be licensed under the terms of the GNU
- * General Public License (GPL) Version 2, available from the file
- * COPYING in the main directory of this source tree, or the
- * OpenIB.org BSD license below:
- *
- * Redistribution and use in source and binary forms, with or
- * without modification, are permitted provided that the following
- * conditions are met:
- *
- * - Redistributions of source code must retain the above
- * copyright notice, this list of conditions and the following
- * disclaimer.
- *
- * - 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.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
- * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
- * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
- #include <asm-generic/kmap_types.h>
- #include <linux/module.h>
- #include <linux/init.h>
- #include <linux/errno.h>
- #include <linux/pci.h>
- #include <linux/dma-mapping.h>
- #include <linux/slab.h>
- #include <linux/io-mapping.h>
- #include <linux/mlx5/driver.h>
- #include <linux/mlx5/cq.h>
- #include <linux/mlx5/qp.h>
- #include <linux/mlx5/srq.h>
- #include <linux/debugfs.h>
- #include "mlx5_core.h"
- #define DRIVER_NAME "mlx5_core"
- #define DRIVER_VERSION "2.2-1"
- #define DRIVER_RELDATE "Feb 2014"
- MODULE_AUTHOR("Eli Cohen <eli@mellanox.com>");
- MODULE_DESCRIPTION("Mellanox ConnectX-IB HCA core library");
- MODULE_LICENSE("Dual BSD/GPL");
- MODULE_VERSION(DRIVER_VERSION);
- int mlx5_core_debug_mask;
- module_param_named(debug_mask, mlx5_core_debug_mask, int, 0644);
- MODULE_PARM_DESC(debug_mask, "debug mask: 1 = dump cmd data, 2 = dump cmd exec time, 3 = both. Default=0");
- struct workqueue_struct *mlx5_core_wq;
- static int set_dma_caps(struct pci_dev *pdev)
- {
- int err;
- err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
- if (err) {
- dev_warn(&pdev->dev, "Warning: couldn't set 64-bit PCI DMA mask.\n");
- err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
- if (err) {
- dev_err(&pdev->dev, "Can't set PCI DMA mask, aborting.\n");
- return err;
- }
- }
- err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
- if (err) {
- dev_warn(&pdev->dev,
- "Warning: couldn't set 64-bit consistent PCI DMA mask.\n");
- err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
- if (err) {
- dev_err(&pdev->dev,
- "Can't set consistent PCI DMA mask, aborting.\n");
- return err;
- }
- }
- dma_set_max_seg_size(&pdev->dev, 2u * 1024 * 1024 * 1024);
- return err;
- }
- static int request_bar(struct pci_dev *pdev)
- {
- int err = 0;
- if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
- dev_err(&pdev->dev, "Missing registers BAR, aborting.\n");
- return -ENODEV;
- }
- err = pci_request_regions(pdev, DRIVER_NAME);
- if (err)
- dev_err(&pdev->dev, "Couldn't get PCI resources, aborting\n");
- return err;
- }
- static void release_bar(struct pci_dev *pdev)
- {
- pci_release_regions(pdev);
- }
- static int mlx5_enable_msix(struct mlx5_core_dev *dev)
- {
- struct mlx5_eq_table *table = &dev->priv.eq_table;
- int num_eqs = 1 << dev->caps.log_max_eq;
- int nvec;
- int err;
- int i;
- nvec = dev->caps.num_ports * num_online_cpus() + MLX5_EQ_VEC_COMP_BASE;
- nvec = min_t(int, nvec, num_eqs);
- if (nvec <= MLX5_EQ_VEC_COMP_BASE)
- return -ENOMEM;
- table->msix_arr = kzalloc(nvec * sizeof(*table->msix_arr), GFP_KERNEL);
- if (!table->msix_arr)
- return -ENOMEM;
- for (i = 0; i < nvec; i++)
- table->msix_arr[i].entry = i;
- retry:
- table->num_comp_vectors = nvec - MLX5_EQ_VEC_COMP_BASE;
- err = pci_enable_msix(dev->pdev, table->msix_arr, nvec);
- if (err <= 0) {
- return err;
- } else if (err > 2) {
- nvec = err;
- goto retry;
- }
- mlx5_core_dbg(dev, "received %d MSI vectors out of %d requested\n", err, nvec);
- return 0;
- }
- static void mlx5_disable_msix(struct mlx5_core_dev *dev)
- {
- struct mlx5_eq_table *table = &dev->priv.eq_table;
- pci_disable_msix(dev->pdev);
- kfree(table->msix_arr);
- }
- struct mlx5_reg_host_endianess {
- u8 he;
- u8 rsvd[15];
- };
- #define CAP_MASK(pos, size) ((u64)((1 << (size)) - 1) << (pos))
- enum {
- MLX5_CAP_BITS_RW_MASK = CAP_MASK(MLX5_CAP_OFF_CMDIF_CSUM, 2) |
- CAP_MASK(MLX5_CAP_OFF_DCT, 1),
- };
- /* selectively copy writable fields clearing any reserved area
- */
- static void copy_rw_fields(struct mlx5_hca_cap *to, struct mlx5_hca_cap *from)
- {
- u64 v64;
- to->log_max_qp = from->log_max_qp & 0x1f;
- to->log_max_ra_req_dc = from->log_max_ra_req_dc & 0x3f;
- to->log_max_ra_res_dc = from->log_max_ra_res_dc & 0x3f;
- to->log_max_ra_req_qp = from->log_max_ra_req_qp & 0x3f;
- to->log_max_ra_res_qp = from->log_max_ra_res_qp & 0x3f;
- to->log_max_atomic_size_qp = from->log_max_atomic_size_qp;
- to->log_max_atomic_size_dc = from->log_max_atomic_size_dc;
- v64 = be64_to_cpu(from->flags) & MLX5_CAP_BITS_RW_MASK;
- to->flags = cpu_to_be64(v64);
- }
- enum {
- HCA_CAP_OPMOD_GET_MAX = 0,
- HCA_CAP_OPMOD_GET_CUR = 1,
- };
- static int handle_hca_cap(struct mlx5_core_dev *dev)
- {
- struct mlx5_cmd_query_hca_cap_mbox_out *query_out = NULL;
- struct mlx5_cmd_set_hca_cap_mbox_in *set_ctx = NULL;
- struct mlx5_cmd_query_hca_cap_mbox_in query_ctx;
- struct mlx5_cmd_set_hca_cap_mbox_out set_out;
- u64 flags;
- int err;
- memset(&query_ctx, 0, sizeof(query_ctx));
- query_out = kzalloc(sizeof(*query_out), GFP_KERNEL);
- if (!query_out)
- return -ENOMEM;
- set_ctx = kzalloc(sizeof(*set_ctx), GFP_KERNEL);
- if (!set_ctx) {
- err = -ENOMEM;
- goto query_ex;
- }
- query_ctx.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_QUERY_HCA_CAP);
- query_ctx.hdr.opmod = cpu_to_be16(HCA_CAP_OPMOD_GET_CUR);
- err = mlx5_cmd_exec(dev, &query_ctx, sizeof(query_ctx),
- query_out, sizeof(*query_out));
- if (err)
- goto query_ex;
- err = mlx5_cmd_status_to_err(&query_out->hdr);
- if (err) {
- mlx5_core_warn(dev, "query hca cap failed, %d\n", err);
- goto query_ex;
- }
- copy_rw_fields(&set_ctx->hca_cap, &query_out->hca_cap);
- if (dev->profile->mask & MLX5_PROF_MASK_QP_SIZE)
- set_ctx->hca_cap.log_max_qp = dev->profile->log_max_qp;
- flags = be64_to_cpu(query_out->hca_cap.flags);
- /* disable checksum */
- flags &= ~MLX5_DEV_CAP_FLAG_CMDIF_CSUM;
- set_ctx->hca_cap.flags = cpu_to_be64(flags);
- memset(&set_out, 0, sizeof(set_out));
- set_ctx->hca_cap.log_uar_page_sz = cpu_to_be16(PAGE_SHIFT - 12);
- set_ctx->hdr.opcode = cpu_to_be16(MLX5_CMD_OP_SET_HCA_CAP);
- err = mlx5_cmd_exec(dev, set_ctx, sizeof(*set_ctx),
- &set_out, sizeof(set_out));
- if (err) {
- mlx5_core_warn(dev, "set hca cap failed, %d\n", err);
- goto query_ex;
- }
- err = mlx5_cmd_status_to_err(&set_out.hdr);
- if (err)
- goto query_ex;
- query_ex:
- kfree(query_out);
- kfree(set_ctx);
- return err;
- }
- static int set_hca_ctrl(struct mlx5_core_dev *dev)
- {
- struct mlx5_reg_host_endianess he_in;
- struct mlx5_reg_host_endianess he_out;
- int err;
- memset(&he_in, 0, sizeof(he_in));
- he_in.he = MLX5_SET_HOST_ENDIANNESS;
- err = mlx5_core_access_reg(dev, &he_in, sizeof(he_in),
- &he_out, sizeof(he_out),
- MLX5_REG_HOST_ENDIANNESS, 0, 1);
- return err;
- }
- static int mlx5_core_enable_hca(struct mlx5_core_dev *dev)
- {
- int err;
- struct mlx5_enable_hca_mbox_in in;
- struct mlx5_enable_hca_mbox_out out;
- memset(&in, 0, sizeof(in));
- memset(&out, 0, sizeof(out));
- in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_ENABLE_HCA);
- err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out));
- if (err)
- return err;
- if (out.hdr.status)
- return mlx5_cmd_status_to_err(&out.hdr);
- return 0;
- }
- static int mlx5_core_disable_hca(struct mlx5_core_dev *dev)
- {
- int err;
- struct mlx5_disable_hca_mbox_in in;
- struct mlx5_disable_hca_mbox_out out;
- memset(&in, 0, sizeof(in));
- memset(&out, 0, sizeof(out));
- in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_DISABLE_HCA);
- err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out));
- if (err)
- return err;
- if (out.hdr.status)
- return mlx5_cmd_status_to_err(&out.hdr);
- return 0;
- }
- int mlx5_dev_init(struct mlx5_core_dev *dev, struct pci_dev *pdev)
- {
- struct mlx5_priv *priv = &dev->priv;
- int err;
- dev->pdev = pdev;
- pci_set_drvdata(dev->pdev, dev);
- strncpy(priv->name, dev_name(&pdev->dev), MLX5_MAX_NAME_LEN);
- priv->name[MLX5_MAX_NAME_LEN - 1] = 0;
- mutex_init(&priv->pgdir_mutex);
- INIT_LIST_HEAD(&priv->pgdir_list);
- spin_lock_init(&priv->mkey_lock);
- priv->dbg_root = debugfs_create_dir(dev_name(&pdev->dev), mlx5_debugfs_root);
- if (!priv->dbg_root)
- return -ENOMEM;
- err = pci_enable_device(pdev);
- if (err) {
- dev_err(&pdev->dev, "Cannot enable PCI device, aborting.\n");
- goto err_dbg;
- }
- err = request_bar(pdev);
- if (err) {
- dev_err(&pdev->dev, "error requesting BARs, aborting.\n");
- goto err_disable;
- }
- pci_set_master(pdev);
- err = set_dma_caps(pdev);
- if (err) {
- dev_err(&pdev->dev, "Failed setting DMA capabilities mask, aborting\n");
- goto err_clr_master;
- }
- dev->iseg_base = pci_resource_start(dev->pdev, 0);
- dev->iseg = ioremap(dev->iseg_base, sizeof(*dev->iseg));
- if (!dev->iseg) {
- err = -ENOMEM;
- dev_err(&pdev->dev, "Failed mapping initialization segment, aborting\n");
- goto err_clr_master;
- }
- dev_info(&pdev->dev, "firmware version: %d.%d.%d\n", fw_rev_maj(dev),
- fw_rev_min(dev), fw_rev_sub(dev));
- err = mlx5_cmd_init(dev);
- if (err) {
- dev_err(&pdev->dev, "Failed initializing command interface, aborting\n");
- goto err_unmap;
- }
- mlx5_pagealloc_init(dev);
- err = mlx5_core_enable_hca(dev);
- if (err) {
- dev_err(&pdev->dev, "enable hca failed\n");
- goto err_pagealloc_cleanup;
- }
- err = mlx5_satisfy_startup_pages(dev, 1);
- if (err) {
- dev_err(&pdev->dev, "failed to allocate boot pages\n");
- goto err_disable_hca;
- }
- err = set_hca_ctrl(dev);
- if (err) {
- dev_err(&pdev->dev, "set_hca_ctrl failed\n");
- goto reclaim_boot_pages;
- }
- err = handle_hca_cap(dev);
- if (err) {
- dev_err(&pdev->dev, "handle_hca_cap failed\n");
- goto reclaim_boot_pages;
- }
- err = mlx5_satisfy_startup_pages(dev, 0);
- if (err) {
- dev_err(&pdev->dev, "failed to allocate init pages\n");
- goto reclaim_boot_pages;
- }
- err = mlx5_pagealloc_start(dev);
- if (err) {
- dev_err(&pdev->dev, "mlx5_pagealloc_start failed\n");
- goto reclaim_boot_pages;
- }
- err = mlx5_cmd_init_hca(dev);
- if (err) {
- dev_err(&pdev->dev, "init hca failed\n");
- goto err_pagealloc_stop;
- }
- mlx5_start_health_poll(dev);
- err = mlx5_cmd_query_hca_cap(dev, &dev->caps);
- if (err) {
- dev_err(&pdev->dev, "query hca failed\n");
- goto err_stop_poll;
- }
- err = mlx5_cmd_query_adapter(dev);
- if (err) {
- dev_err(&pdev->dev, "query adapter failed\n");
- goto err_stop_poll;
- }
- err = mlx5_enable_msix(dev);
- if (err) {
- dev_err(&pdev->dev, "enable msix failed\n");
- goto err_stop_poll;
- }
- err = mlx5_eq_init(dev);
- if (err) {
- dev_err(&pdev->dev, "failed to initialize eq\n");
- goto disable_msix;
- }
- err = mlx5_alloc_uuars(dev, &priv->uuari);
- if (err) {
- dev_err(&pdev->dev, "Failed allocating uar, aborting\n");
- goto err_eq_cleanup;
- }
- err = mlx5_start_eqs(dev);
- if (err) {
- dev_err(&pdev->dev, "Failed to start pages and async EQs\n");
- goto err_free_uar;
- }
- MLX5_INIT_DOORBELL_LOCK(&priv->cq_uar_lock);
- mlx5_init_cq_table(dev);
- mlx5_init_qp_table(dev);
- mlx5_init_srq_table(dev);
- return 0;
- err_free_uar:
- mlx5_free_uuars(dev, &priv->uuari);
- err_eq_cleanup:
- mlx5_eq_cleanup(dev);
- disable_msix:
- mlx5_disable_msix(dev);
- err_stop_poll:
- mlx5_stop_health_poll(dev);
- if (mlx5_cmd_teardown_hca(dev)) {
- dev_err(&dev->pdev->dev, "tear_down_hca failed, skip cleanup\n");
- return err;
- }
- err_pagealloc_stop:
- mlx5_pagealloc_stop(dev);
- reclaim_boot_pages:
- mlx5_reclaim_startup_pages(dev);
- err_disable_hca:
- mlx5_core_disable_hca(dev);
- err_pagealloc_cleanup:
- mlx5_pagealloc_cleanup(dev);
- mlx5_cmd_cleanup(dev);
- err_unmap:
- iounmap(dev->iseg);
- err_clr_master:
- pci_clear_master(dev->pdev);
- release_bar(dev->pdev);
- err_disable:
- pci_disable_device(dev->pdev);
- err_dbg:
- debugfs_remove(priv->dbg_root);
- return err;
- }
- EXPORT_SYMBOL(mlx5_dev_init);
- void mlx5_dev_cleanup(struct mlx5_core_dev *dev)
- {
- struct mlx5_priv *priv = &dev->priv;
- mlx5_cleanup_srq_table(dev);
- mlx5_cleanup_qp_table(dev);
- mlx5_cleanup_cq_table(dev);
- mlx5_stop_eqs(dev);
- mlx5_free_uuars(dev, &priv->uuari);
- mlx5_eq_cleanup(dev);
- mlx5_disable_msix(dev);
- mlx5_stop_health_poll(dev);
- if (mlx5_cmd_teardown_hca(dev)) {
- dev_err(&dev->pdev->dev, "tear_down_hca failed, skip cleanup\n");
- return;
- }
- mlx5_pagealloc_stop(dev);
- mlx5_reclaim_startup_pages(dev);
- mlx5_core_disable_hca(dev);
- mlx5_pagealloc_cleanup(dev);
- mlx5_cmd_cleanup(dev);
- iounmap(dev->iseg);
- pci_clear_master(dev->pdev);
- release_bar(dev->pdev);
- pci_disable_device(dev->pdev);
- debugfs_remove(priv->dbg_root);
- }
- EXPORT_SYMBOL(mlx5_dev_cleanup);
- static int __init init(void)
- {
- int err;
- mlx5_register_debugfs();
- mlx5_core_wq = create_singlethread_workqueue("mlx5_core_wq");
- if (!mlx5_core_wq) {
- err = -ENOMEM;
- goto err_debug;
- }
- mlx5_health_init();
- return 0;
- mlx5_health_cleanup();
- err_debug:
- mlx5_unregister_debugfs();
- return err;
- }
- static void __exit cleanup(void)
- {
- mlx5_health_cleanup();
- destroy_workqueue(mlx5_core_wq);
- mlx5_unregister_debugfs();
- }
- module_init(init);
- module_exit(cleanup);