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 two 6 * licenses. You may choose to be licensed under the terms of the GNU 7 * General Public License (GPL) Version 2, available from the file 8 * COPYING in the main directory of this source tree, or the 9 * OpenIB.org BSD license below: 10 * 11 * Redistribution and use in source and binary forms, with or 12 * without modification, are permitted provided that the following 13 * conditions are met: 14 * 15 * - Redistributions of source code must retain the above 16 * copyright notice, this list of conditions and the following 17 * disclaimer. 18 * 19 * - Redistributions in binary form must reproduce the above 20 * copyright notice, this list of conditions and the following 21 * disclaimer in the documentation and/or other materials 22 * 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 OF 26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 31 * 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 43 enum { 44 MLX4_NUM_RESERVED_UARS = 8 45 }; 46 47 int 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 } 57 EXPORT_SYMBOL_GPL(mlx4_pd_alloc); 58 59 void mlx4_pd_free(struct mlx4_dev *dev, u32 pdn) 60 { 61 mlx4_bitmap_free(&mlx4_priv(dev)->pd_bitmap, pdn, MLX4_USE_RR); 62 } 63 EXPORT_SYMBOL_GPL(mlx4_pd_free); 64 65 int __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 76 int 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 } 94 EXPORT_SYMBOL_GPL(mlx4_xrcd_alloc); 95 96 void __mlx4_xrcd_free(struct mlx4_dev *dev, u32 xrcdn) 97 { 98 mlx4_bitmap_free(&mlx4_priv(dev)->xrcd_bitmap, xrcdn, MLX4_USE_RR); 99 } 100 101 void 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 } else 114 __mlx4_xrcd_free(dev, xrcdn); 115 } 116 EXPORT_SYMBOL_GPL(mlx4_xrcd_free); 117 118 int 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 } 126 127 void mlx4_cleanup_pd_table(struct mlx4_dev *dev) 128 { 129 mlx4_bitmap_cleanup(&mlx4_priv(dev)->pd_bitmap); 130 } 131 132 int 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 } 139 140 void mlx4_cleanup_xrcd_table(struct mlx4_dev *dev) 141 { 142 mlx4_bitmap_cleanup(&mlx4_priv(dev)->xrcd_bitmap); 143 } 144 145 int 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->pdev, 2) / 155 dev->caps.uar_page_size); 156 else 157 offset = uar->index; 158 uar->pfn = (pci_resource_start(dev->pdev, 2) >> PAGE_SHIFT) + offset; 159 uar->map = NULL; 160 return 0; 161 } 162 EXPORT_SYMBOL_GPL(mlx4_uar_alloc); 163 164 void mlx4_uar_free(struct mlx4_dev *dev, struct mlx4_uar *uar) 165 { 166 mlx4_bitmap_free(&mlx4_priv(dev)->uar_table.bitmap, uar->index, MLX4_USE_RR); 167 } 168 EXPORT_SYMBOL_GPL(mlx4_uar_free); 169 170 int mlx4_bf_alloc(struct mlx4_dev *dev, struct mlx4_bf *bf, int node) 171 { 172 struct mlx4_priv *priv = mlx4_priv(dev); 173 struct mlx4_uar *uar; 174 int err = 0; 175 int idx; 176 177 if (!priv->bf_mapping) 178 return -ENOMEM; 179 180 mutex_lock(&priv->bf_mutex); 181 if (!list_empty(&priv->bf_list)) 182 uar = list_entry(priv->bf_list.next, struct mlx4_uar, bf_list); 183 else { 184 if (mlx4_bitmap_avail(&priv->uar_table.bitmap) < MLX4_NUM_RESERVED_UARS) { 185 err = -ENOMEM; 186 goto out; 187 } 188 uar = kmalloc_node(sizeof(*uar), GFP_KERNEL, node); 189 if (!uar) { 190 uar = kmalloc(sizeof(*uar), GFP_KERNEL); 191 if (!uar) { 192 err = -ENOMEM; 193 goto out; 194 } 195 } 196 err = mlx4_uar_alloc(dev, uar); 197 if (err) 198 goto free_kmalloc; 199 200 uar->map = ioremap(uar->pfn << PAGE_SHIFT, PAGE_SIZE); 201 if (!uar->map) { 202 err = -ENOMEM; 203 goto free_uar; 204 } 205 206 uar->bf_map = io_mapping_map_wc(priv->bf_mapping, uar->index << PAGE_SHIFT); 207 if (!uar->bf_map) { 208 err = -ENOMEM; 209 goto unamp_uar; 210 } 211 uar->free_bf_bmap = 0; 212 list_add(&uar->bf_list, &priv->bf_list); 213 } 214 215 bf->uar = uar; 216 idx = ffz(uar->free_bf_bmap); 217 uar->free_bf_bmap |= 1 << idx; 218 bf->uar = uar; 219 bf->offset = 0; 220 bf->buf_size = dev->caps.bf_reg_size / 2; 221 bf->reg = uar->bf_map + idx * dev->caps.bf_reg_size; 222 if (uar->free_bf_bmap == (1 << dev->caps.bf_regs_per_page) - 1) 223 list_del_init(&uar->bf_list); 224 225 goto out; 226 227 unamp_uar: 228 bf->uar = NULL; 229 iounmap(uar->map); 230 231 free_uar: 232 mlx4_uar_free(dev, uar); 233 234 free_kmalloc: 235 kfree(uar); 236 237 out: 238 mutex_unlock(&priv->bf_mutex); 239 return err; 240 } 241 EXPORT_SYMBOL_GPL(mlx4_bf_alloc); 242 243 void mlx4_bf_free(struct mlx4_dev *dev, struct mlx4_bf *bf) 244 { 245 struct mlx4_priv *priv = mlx4_priv(dev); 246 int idx; 247 248 if (!bf->uar || !bf->uar->bf_map) 249 return; 250 251 mutex_lock(&priv->bf_mutex); 252 idx = (bf->reg - bf->uar->bf_map) / dev->caps.bf_reg_size; 253 bf->uar->free_bf_bmap &= ~(1 << idx); 254 if (!bf->uar->free_bf_bmap) { 255 if (!list_empty(&bf->uar->bf_list)) 256 list_del(&bf->uar->bf_list); 257 258 io_mapping_unmap(bf->uar->bf_map); 259 iounmap(bf->uar->map); 260 mlx4_uar_free(dev, bf->uar); 261 kfree(bf->uar); 262 } else if (list_empty(&bf->uar->bf_list)) 263 list_add(&bf->uar->bf_list, &priv->bf_list); 264 265 mutex_unlock(&priv->bf_mutex); 266 } 267 EXPORT_SYMBOL_GPL(mlx4_bf_free); 268 269 int mlx4_init_uar_table(struct mlx4_dev *dev) 270 { 271 if (dev->caps.num_uars <= 128) { 272 mlx4_err(dev, "Only %d UAR pages (need more than 128)\n", 273 dev->caps.num_uars); 274 mlx4_err(dev, "Increase firmware log2_uar_bar_megabytes?\n"); 275 return -ENODEV; 276 } 277 278 return mlx4_bitmap_init(&mlx4_priv(dev)->uar_table.bitmap, 279 dev->caps.num_uars, dev->caps.num_uars - 1, 280 dev->caps.reserved_uars, 0); 281 } 282 283 void mlx4_cleanup_uar_table(struct mlx4_dev *dev) 284 { 285 mlx4_bitmap_cleanup(&mlx4_priv(dev)->uar_table.bitmap); 286 } 287