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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 | /* * Copyright (c) 2006, 2007 Cisco Systems, Inc. All rights reserved. * Copyright (c) 2005 Mellanox Technologies. 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 <linux/errno.h> #include <linux/export.h> #include <linux/io-mapping.h> #include <asm/page.h> #include "mlx4.h" #include "icm.h" enum { MLX4_NUM_RESERVED_UARS = 8 }; int mlx4_pd_alloc(struct mlx4_dev *dev, u32 *pdn) { struct mlx4_priv *priv = mlx4_priv(dev); *pdn = mlx4_bitmap_alloc(&priv->pd_bitmap); if (*pdn == -1) return -ENOMEM; return 0; } EXPORT_SYMBOL_GPL(mlx4_pd_alloc); void mlx4_pd_free(struct mlx4_dev *dev, u32 pdn) { mlx4_bitmap_free(&mlx4_priv(dev)->pd_bitmap, pdn); } EXPORT_SYMBOL_GPL(mlx4_pd_free); int mlx4_xrcd_alloc(struct mlx4_dev *dev, u32 *xrcdn) { struct mlx4_priv *priv = mlx4_priv(dev); *xrcdn = mlx4_bitmap_alloc(&priv->xrcd_bitmap); if (*xrcdn == -1) return -ENOMEM; return 0; } EXPORT_SYMBOL_GPL(mlx4_xrcd_alloc); void mlx4_xrcd_free(struct mlx4_dev *dev, u32 xrcdn) { mlx4_bitmap_free(&mlx4_priv(dev)->xrcd_bitmap, xrcdn); } EXPORT_SYMBOL_GPL(mlx4_xrcd_free); int mlx4_init_pd_table(struct mlx4_dev *dev) { struct mlx4_priv *priv = mlx4_priv(dev); return mlx4_bitmap_init(&priv->pd_bitmap, dev->caps.num_pds, (1 << 24) - 1, dev->caps.reserved_pds, 0); } void mlx4_cleanup_pd_table(struct mlx4_dev *dev) { mlx4_bitmap_cleanup(&mlx4_priv(dev)->pd_bitmap); } int mlx4_init_xrcd_table(struct mlx4_dev *dev) { struct mlx4_priv *priv = mlx4_priv(dev); return mlx4_bitmap_init(&priv->xrcd_bitmap, (1 << 16), (1 << 16) - 1, dev->caps.reserved_xrcds + 1, 0); } void mlx4_cleanup_xrcd_table(struct mlx4_dev *dev) { mlx4_bitmap_cleanup(&mlx4_priv(dev)->xrcd_bitmap); } int mlx4_uar_alloc(struct mlx4_dev *dev, struct mlx4_uar *uar) { uar->index = mlx4_bitmap_alloc(&mlx4_priv(dev)->uar_table.bitmap); if (uar->index == -1) return -ENOMEM; uar->pfn = (pci_resource_start(dev->pdev, 2) >> PAGE_SHIFT) + uar->index; uar->map = NULL; return 0; } EXPORT_SYMBOL_GPL(mlx4_uar_alloc); void mlx4_uar_free(struct mlx4_dev *dev, struct mlx4_uar *uar) { mlx4_bitmap_free(&mlx4_priv(dev)->uar_table.bitmap, uar->index); } EXPORT_SYMBOL_GPL(mlx4_uar_free); int mlx4_bf_alloc(struct mlx4_dev *dev, struct mlx4_bf *bf) { struct mlx4_priv *priv = mlx4_priv(dev); struct mlx4_uar *uar; int err = 0; int idx; if (!priv->bf_mapping) return -ENOMEM; mutex_lock(&priv->bf_mutex); if (!list_empty(&priv->bf_list)) uar = list_entry(priv->bf_list.next, struct mlx4_uar, bf_list); else { if (mlx4_bitmap_avail(&priv->uar_table.bitmap) < MLX4_NUM_RESERVED_UARS) { err = -ENOMEM; goto out; } uar = kmalloc(sizeof *uar, GFP_KERNEL); if (!uar) { err = -ENOMEM; goto out; } err = mlx4_uar_alloc(dev, uar); if (err) goto free_kmalloc; uar->map = ioremap(uar->pfn << PAGE_SHIFT, PAGE_SIZE); if (!uar->map) { err = -ENOMEM; goto free_uar; } uar->bf_map = io_mapping_map_wc(priv->bf_mapping, uar->index << PAGE_SHIFT); if (!uar->bf_map) { err = -ENOMEM; goto unamp_uar; } uar->free_bf_bmap = 0; list_add(&uar->bf_list, &priv->bf_list); } bf->uar = uar; idx = ffz(uar->free_bf_bmap); uar->free_bf_bmap |= 1 << idx; bf->uar = uar; bf->offset = 0; bf->buf_size = dev->caps.bf_reg_size / 2; bf->reg = uar->bf_map + idx * dev->caps.bf_reg_size; if (uar->free_bf_bmap == (1 << dev->caps.bf_regs_per_page) - 1) list_del_init(&uar->bf_list); goto out; unamp_uar: bf->uar = NULL; iounmap(uar->map); free_uar: mlx4_uar_free(dev, uar); free_kmalloc: kfree(uar); out: mutex_unlock(&priv->bf_mutex); return err; } EXPORT_SYMBOL_GPL(mlx4_bf_alloc); void mlx4_bf_free(struct mlx4_dev *dev, struct mlx4_bf *bf) { struct mlx4_priv *priv = mlx4_priv(dev); int idx; if (!bf->uar || !bf->uar->bf_map) return; mutex_lock(&priv->bf_mutex); idx = (bf->reg - bf->uar->bf_map) / dev->caps.bf_reg_size; bf->uar->free_bf_bmap &= ~(1 << idx); if (!bf->uar->free_bf_bmap) { if (!list_empty(&bf->uar->bf_list)) list_del(&bf->uar->bf_list); io_mapping_unmap(bf->uar->bf_map); iounmap(bf->uar->map); mlx4_uar_free(dev, bf->uar); kfree(bf->uar); } else if (list_empty(&bf->uar->bf_list)) list_add(&bf->uar->bf_list, &priv->bf_list); mutex_unlock(&priv->bf_mutex); } EXPORT_SYMBOL_GPL(mlx4_bf_free); int mlx4_init_uar_table(struct mlx4_dev *dev) { if (dev->caps.num_uars <= 128) { mlx4_err(dev, "Only %d UAR pages (need more than 128)\n", dev->caps.num_uars); mlx4_err(dev, "Increase firmware log2_uar_bar_megabytes?\n"); return -ENODEV; } return mlx4_bitmap_init(&mlx4_priv(dev)->uar_table.bitmap, dev->caps.num_uars, dev->caps.num_uars - 1, max(128, dev->caps.reserved_uars), 0); } void mlx4_cleanup_uar_table(struct mlx4_dev *dev) { mlx4_bitmap_cleanup(&mlx4_priv(dev)->uar_table.bitmap); } |