296 lines · c
1/*2 * Copyright (c) 2006, 2007 Cisco Systems, Inc. All rights reserved.3 * Copyright (c) 2005 Mellanox Technologies. All rights reserved.4 *5 * This software is available to you under a choice of one of two6 * licenses. You may choose to be licensed under the terms of the GNU7 * General Public License (GPL) Version 2, available from the file8 * COPYING in the main directory of this source tree, or the9 * OpenIB.org BSD license below:10 *11 * Redistribution and use in source and binary forms, with or12 * without modification, are permitted provided that the following13 * conditions are met:14 *15 * - Redistributions of source code must retain the above16 * copyright notice, this list of conditions and the following17 * disclaimer.18 *19 * - Redistributions in binary form must reproduce the above20 * copyright notice, this list of conditions and the following21 * disclaimer in the documentation and/or other materials22 * provided with the distribution.23 *24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE31 * SOFTWARE.32 */33 34#include <linux/errno.h>35#include <linux/export.h>36#include <linux/io-mapping.h>37 38#include <asm/page.h>39 40#include "mlx4.h"41#include "icm.h"42 43enum {44 MLX4_NUM_RESERVED_UARS = 845};46 47int mlx4_pd_alloc(struct mlx4_dev *dev, u32 *pdn)48{49 struct mlx4_priv *priv = mlx4_priv(dev);50 51 *pdn = mlx4_bitmap_alloc(&priv->pd_bitmap);52 if (*pdn == -1)53 return -ENOMEM;54 55 return 0;56}57EXPORT_SYMBOL_GPL(mlx4_pd_alloc);58 59void mlx4_pd_free(struct mlx4_dev *dev, u32 pdn)60{61 mlx4_bitmap_free(&mlx4_priv(dev)->pd_bitmap, pdn, MLX4_USE_RR);62}63EXPORT_SYMBOL_GPL(mlx4_pd_free);64 65int __mlx4_xrcd_alloc(struct mlx4_dev *dev, u32 *xrcdn)66{67 struct mlx4_priv *priv = mlx4_priv(dev);68 69 *xrcdn = mlx4_bitmap_alloc(&priv->xrcd_bitmap);70 if (*xrcdn == -1)71 return -ENOMEM;72 73 return 0;74}75 76int mlx4_xrcd_alloc(struct mlx4_dev *dev, u32 *xrcdn)77{78 u64 out_param;79 int err;80 81 if (mlx4_is_mfunc(dev)) {82 err = mlx4_cmd_imm(dev, 0, &out_param,83 RES_XRCD, RES_OP_RESERVE,84 MLX4_CMD_ALLOC_RES,85 MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED);86 if (err)87 return err;88 89 *xrcdn = get_param_l(&out_param);90 return 0;91 }92 return __mlx4_xrcd_alloc(dev, xrcdn);93}94EXPORT_SYMBOL_GPL(mlx4_xrcd_alloc);95 96void __mlx4_xrcd_free(struct mlx4_dev *dev, u32 xrcdn)97{98 mlx4_bitmap_free(&mlx4_priv(dev)->xrcd_bitmap, xrcdn, MLX4_USE_RR);99}100 101void mlx4_xrcd_free(struct mlx4_dev *dev, u32 xrcdn)102{103 u64 in_param = 0;104 int err;105 106 if (mlx4_is_mfunc(dev)) {107 set_param_l(&in_param, xrcdn);108 err = mlx4_cmd(dev, in_param, RES_XRCD,109 RES_OP_RESERVE, MLX4_CMD_FREE_RES,110 MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED);111 if (err)112 mlx4_warn(dev, "Failed to release xrcdn %d\n", xrcdn);113 } else114 __mlx4_xrcd_free(dev, xrcdn);115}116EXPORT_SYMBOL_GPL(mlx4_xrcd_free);117 118int mlx4_init_pd_table(struct mlx4_dev *dev)119{120 struct mlx4_priv *priv = mlx4_priv(dev);121 122 return mlx4_bitmap_init(&priv->pd_bitmap, dev->caps.num_pds,123 (1 << NOT_MASKED_PD_BITS) - 1,124 dev->caps.reserved_pds, 0);125}126 127void mlx4_cleanup_pd_table(struct mlx4_dev *dev)128{129 mlx4_bitmap_cleanup(&mlx4_priv(dev)->pd_bitmap);130}131 132int mlx4_init_xrcd_table(struct mlx4_dev *dev)133{134 struct mlx4_priv *priv = mlx4_priv(dev);135 136 return mlx4_bitmap_init(&priv->xrcd_bitmap, (1 << 16),137 (1 << 16) - 1, dev->caps.reserved_xrcds + 1, 0);138}139 140void mlx4_cleanup_xrcd_table(struct mlx4_dev *dev)141{142 mlx4_bitmap_cleanup(&mlx4_priv(dev)->xrcd_bitmap);143}144 145int mlx4_uar_alloc(struct mlx4_dev *dev, struct mlx4_uar *uar)146{147 int offset;148 149 uar->index = mlx4_bitmap_alloc(&mlx4_priv(dev)->uar_table.bitmap);150 if (uar->index == -1)151 return -ENOMEM;152 153 if (mlx4_is_slave(dev))154 offset = uar->index % ((int)pci_resource_len(dev->persist->pdev,155 2) /156 dev->caps.uar_page_size);157 else158 offset = uar->index;159 uar->pfn = (pci_resource_start(dev->persist->pdev, 2) >> PAGE_SHIFT)160 + offset;161 uar->map = NULL;162 return 0;163}164EXPORT_SYMBOL_GPL(mlx4_uar_alloc);165 166void mlx4_uar_free(struct mlx4_dev *dev, struct mlx4_uar *uar)167{168 mlx4_bitmap_free(&mlx4_priv(dev)->uar_table.bitmap, uar->index, MLX4_USE_RR);169}170EXPORT_SYMBOL_GPL(mlx4_uar_free);171 172int mlx4_bf_alloc(struct mlx4_dev *dev, struct mlx4_bf *bf, int node)173{174 struct mlx4_priv *priv = mlx4_priv(dev);175 struct mlx4_uar *uar;176 int err = 0;177 int idx;178 179 if (!priv->bf_mapping)180 return -ENOMEM;181 182 mutex_lock(&priv->bf_mutex);183 if (!list_empty(&priv->bf_list))184 uar = list_entry(priv->bf_list.next, struct mlx4_uar, bf_list);185 else {186 if (mlx4_bitmap_avail(&priv->uar_table.bitmap) < MLX4_NUM_RESERVED_UARS) {187 err = -ENOMEM;188 goto out;189 }190 uar = kmalloc_node(sizeof(*uar), GFP_KERNEL, node);191 if (!uar) {192 uar = kmalloc(sizeof(*uar), GFP_KERNEL);193 if (!uar) {194 err = -ENOMEM;195 goto out;196 }197 }198 err = mlx4_uar_alloc(dev, uar);199 if (err)200 goto free_kmalloc;201 202 uar->map = ioremap(uar->pfn << PAGE_SHIFT, PAGE_SIZE);203 if (!uar->map) {204 err = -ENOMEM;205 goto free_uar;206 }207 208 uar->bf_map = io_mapping_map_wc(priv->bf_mapping,209 uar->index << PAGE_SHIFT,210 PAGE_SIZE);211 if (!uar->bf_map) {212 err = -ENOMEM;213 goto unamp_uar;214 }215 uar->free_bf_bmap = 0;216 list_add(&uar->bf_list, &priv->bf_list);217 }218 219 idx = ffz(uar->free_bf_bmap);220 uar->free_bf_bmap |= 1 << idx;221 bf->uar = uar;222 bf->offset = 0;223 bf->buf_size = dev->caps.bf_reg_size / 2;224 bf->reg = uar->bf_map + idx * dev->caps.bf_reg_size;225 if (uar->free_bf_bmap == (1 << dev->caps.bf_regs_per_page) - 1)226 list_del_init(&uar->bf_list);227 228 goto out;229 230unamp_uar:231 bf->uar = NULL;232 iounmap(uar->map);233 234free_uar:235 mlx4_uar_free(dev, uar);236 237free_kmalloc:238 kfree(uar);239 240out:241 mutex_unlock(&priv->bf_mutex);242 return err;243}244EXPORT_SYMBOL_GPL(mlx4_bf_alloc);245 246void mlx4_bf_free(struct mlx4_dev *dev, struct mlx4_bf *bf)247{248 struct mlx4_priv *priv = mlx4_priv(dev);249 int idx;250 251 if (!bf->uar || !bf->uar->bf_map)252 return;253 254 mutex_lock(&priv->bf_mutex);255 idx = (bf->reg - bf->uar->bf_map) / dev->caps.bf_reg_size;256 bf->uar->free_bf_bmap &= ~(1 << idx);257 if (!bf->uar->free_bf_bmap) {258 if (!list_empty(&bf->uar->bf_list))259 list_del(&bf->uar->bf_list);260 261 io_mapping_unmap(bf->uar->bf_map);262 iounmap(bf->uar->map);263 mlx4_uar_free(dev, bf->uar);264 kfree(bf->uar);265 } else if (list_empty(&bf->uar->bf_list))266 list_add(&bf->uar->bf_list, &priv->bf_list);267 268 mutex_unlock(&priv->bf_mutex);269}270EXPORT_SYMBOL_GPL(mlx4_bf_free);271 272int mlx4_init_uar_table(struct mlx4_dev *dev)273{274 int num_reserved_uar = mlx4_get_num_reserved_uar(dev);275 276 mlx4_dbg(dev, "uar_page_shift = %d", dev->uar_page_shift);277 mlx4_dbg(dev, "Effective reserved_uars=%d", dev->caps.reserved_uars);278 279 if (dev->caps.num_uars <= num_reserved_uar) {280 mlx4_err(281 dev, "Only %d UAR pages (need more than %d)\n",282 dev->caps.num_uars, num_reserved_uar);283 mlx4_err(dev, "Increase firmware log2_uar_bar_megabytes?\n");284 return -ENODEV;285 }286 287 return mlx4_bitmap_init(&mlx4_priv(dev)->uar_table.bitmap,288 dev->caps.num_uars, dev->caps.num_uars - 1,289 dev->caps.reserved_uars, 0);290}291 292void mlx4_cleanup_uar_table(struct mlx4_dev *dev)293{294 mlx4_bitmap_cleanup(&mlx4_priv(dev)->uar_table.bitmap);295}296