Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 1 | /* |
Saeed Mahameed | 302bdf6 | 2015-04-02 17:07:29 +0300 | [diff] [blame] | 2 | * Copyright (c) 2013-2015, Mellanox Technologies. All rights reserved. |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 3 | * |
| 4 | * This software is available to you under a choice of one of two |
| 5 | * licenses. You may choose to be licensed under the terms of the GNU |
| 6 | * General Public License (GPL) Version 2, available from the file |
| 7 | * COPYING in the main directory of this source tree, or the |
| 8 | * OpenIB.org BSD license below: |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or |
| 11 | * without modification, are permitted provided that the following |
| 12 | * conditions are met: |
| 13 | * |
| 14 | * - Redistributions of source code must retain the above |
| 15 | * copyright notice, this list of conditions and the following |
| 16 | * disclaimer. |
| 17 | * |
| 18 | * - Redistributions in binary form must reproduce the above |
| 19 | * copyright notice, this list of conditions and the following |
| 20 | * disclaimer in the documentation and/or other materials |
| 21 | * provided with the distribution. |
| 22 | * |
| 23 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 24 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 25 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 26 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| 27 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 28 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 29 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 30 | * SOFTWARE. |
| 31 | */ |
| 32 | |
| 33 | #include <linux/kernel.h> |
| 34 | #include <linux/module.h> |
Achiad Shochat | 88a85f9 | 2015-07-23 23:35:59 +0300 | [diff] [blame] | 35 | #include <linux/io-mapping.h> |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 36 | #include <linux/mlx5/driver.h> |
| 37 | #include <linux/mlx5/cmd.h> |
| 38 | #include "mlx5_core.h" |
| 39 | |
| 40 | enum { |
| 41 | NUM_DRIVER_UARS = 4, |
| 42 | NUM_LOW_LAT_UUARS = 4, |
| 43 | }; |
| 44 | |
| 45 | |
| 46 | struct mlx5_alloc_uar_mbox_in { |
| 47 | struct mlx5_inbox_hdr hdr; |
| 48 | u8 rsvd[8]; |
| 49 | }; |
| 50 | |
| 51 | struct mlx5_alloc_uar_mbox_out { |
| 52 | struct mlx5_outbox_hdr hdr; |
| 53 | __be32 uarn; |
| 54 | u8 rsvd[4]; |
| 55 | }; |
| 56 | |
| 57 | struct mlx5_free_uar_mbox_in { |
| 58 | struct mlx5_inbox_hdr hdr; |
| 59 | __be32 uarn; |
| 60 | u8 rsvd[4]; |
| 61 | }; |
| 62 | |
| 63 | struct mlx5_free_uar_mbox_out { |
| 64 | struct mlx5_outbox_hdr hdr; |
| 65 | u8 rsvd[8]; |
| 66 | }; |
| 67 | |
| 68 | int mlx5_cmd_alloc_uar(struct mlx5_core_dev *dev, u32 *uarn) |
| 69 | { |
| 70 | struct mlx5_alloc_uar_mbox_in in; |
| 71 | struct mlx5_alloc_uar_mbox_out out; |
| 72 | int err; |
| 73 | |
| 74 | memset(&in, 0, sizeof(in)); |
| 75 | memset(&out, 0, sizeof(out)); |
| 76 | in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_ALLOC_UAR); |
| 77 | err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out)); |
| 78 | if (err) |
| 79 | goto ex; |
| 80 | |
| 81 | if (out.hdr.status) { |
| 82 | err = mlx5_cmd_status_to_err(&out.hdr); |
| 83 | goto ex; |
| 84 | } |
| 85 | |
| 86 | *uarn = be32_to_cpu(out.uarn) & 0xffffff; |
| 87 | |
| 88 | ex: |
| 89 | return err; |
| 90 | } |
| 91 | EXPORT_SYMBOL(mlx5_cmd_alloc_uar); |
| 92 | |
| 93 | int mlx5_cmd_free_uar(struct mlx5_core_dev *dev, u32 uarn) |
| 94 | { |
| 95 | struct mlx5_free_uar_mbox_in in; |
| 96 | struct mlx5_free_uar_mbox_out out; |
| 97 | int err; |
| 98 | |
| 99 | memset(&in, 0, sizeof(in)); |
Majd Dibbiny | 6b60d5e | 2014-12-02 12:26:16 +0200 | [diff] [blame] | 100 | memset(&out, 0, sizeof(out)); |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 101 | in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_DEALLOC_UAR); |
| 102 | in.uarn = cpu_to_be32(uarn); |
| 103 | err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out)); |
| 104 | if (err) |
| 105 | goto ex; |
| 106 | |
| 107 | if (out.hdr.status) |
| 108 | err = mlx5_cmd_status_to_err(&out.hdr); |
| 109 | |
| 110 | ex: |
| 111 | return err; |
| 112 | } |
| 113 | EXPORT_SYMBOL(mlx5_cmd_free_uar); |
| 114 | |
| 115 | static int need_uuar_lock(int uuarn) |
| 116 | { |
| 117 | int tot_uuars = NUM_DRIVER_UARS * MLX5_BF_REGS_PER_PAGE; |
| 118 | |
| 119 | if (uuarn == 0 || tot_uuars - NUM_LOW_LAT_UUARS) |
| 120 | return 0; |
| 121 | |
| 122 | return 1; |
| 123 | } |
| 124 | |
| 125 | int mlx5_alloc_uuars(struct mlx5_core_dev *dev, struct mlx5_uuar_info *uuari) |
| 126 | { |
| 127 | int tot_uuars = NUM_DRIVER_UARS * MLX5_BF_REGS_PER_PAGE; |
| 128 | struct mlx5_bf *bf; |
| 129 | phys_addr_t addr; |
| 130 | int err; |
| 131 | int i; |
| 132 | |
| 133 | uuari->num_uars = NUM_DRIVER_UARS; |
| 134 | uuari->num_low_latency_uuars = NUM_LOW_LAT_UUARS; |
| 135 | |
| 136 | mutex_init(&uuari->lock); |
| 137 | uuari->uars = kcalloc(uuari->num_uars, sizeof(*uuari->uars), GFP_KERNEL); |
| 138 | if (!uuari->uars) |
| 139 | return -ENOMEM; |
| 140 | |
| 141 | uuari->bfs = kcalloc(tot_uuars, sizeof(*uuari->bfs), GFP_KERNEL); |
| 142 | if (!uuari->bfs) { |
| 143 | err = -ENOMEM; |
| 144 | goto out_uars; |
| 145 | } |
| 146 | |
| 147 | uuari->bitmap = kcalloc(BITS_TO_LONGS(tot_uuars), sizeof(*uuari->bitmap), |
| 148 | GFP_KERNEL); |
| 149 | if (!uuari->bitmap) { |
| 150 | err = -ENOMEM; |
| 151 | goto out_bfs; |
| 152 | } |
| 153 | |
| 154 | uuari->count = kcalloc(tot_uuars, sizeof(*uuari->count), GFP_KERNEL); |
| 155 | if (!uuari->count) { |
| 156 | err = -ENOMEM; |
| 157 | goto out_bitmap; |
| 158 | } |
| 159 | |
| 160 | for (i = 0; i < uuari->num_uars; i++) { |
| 161 | err = mlx5_cmd_alloc_uar(dev, &uuari->uars[i].index); |
| 162 | if (err) |
| 163 | goto out_count; |
| 164 | |
| 165 | addr = dev->iseg_base + ((phys_addr_t)(uuari->uars[i].index) << PAGE_SHIFT); |
| 166 | uuari->uars[i].map = ioremap(addr, PAGE_SIZE); |
| 167 | if (!uuari->uars[i].map) { |
| 168 | mlx5_cmd_free_uar(dev, uuari->uars[i].index); |
Wei Yongjun | a661b43 | 2013-07-30 07:57:06 +0800 | [diff] [blame] | 169 | err = -ENOMEM; |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 170 | goto out_count; |
| 171 | } |
| 172 | mlx5_core_dbg(dev, "allocated uar index 0x%x, mmaped at %p\n", |
| 173 | uuari->uars[i].index, uuari->uars[i].map); |
| 174 | } |
| 175 | |
| 176 | for (i = 0; i < tot_uuars; i++) { |
| 177 | bf = &uuari->bfs[i]; |
| 178 | |
Saeed Mahameed | 938fe83 | 2015-05-28 22:28:41 +0300 | [diff] [blame] | 179 | bf->buf_size = (1 << MLX5_CAP_GEN(dev, log_bf_reg_size)) / 2; |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 180 | bf->uar = &uuari->uars[i / MLX5_BF_REGS_PER_PAGE]; |
| 181 | bf->regreg = uuari->uars[i / MLX5_BF_REGS_PER_PAGE].map; |
| 182 | bf->reg = NULL; /* Add WC support */ |
Saeed Mahameed | 938fe83 | 2015-05-28 22:28:41 +0300 | [diff] [blame] | 183 | bf->offset = (i % MLX5_BF_REGS_PER_PAGE) * |
| 184 | (1 << MLX5_CAP_GEN(dev, log_bf_reg_size)) + |
| 185 | MLX5_BF_OFFSET; |
Eli Cohen | e126ba9 | 2013-07-07 17:25:49 +0300 | [diff] [blame] | 186 | bf->need_lock = need_uuar_lock(i); |
| 187 | spin_lock_init(&bf->lock); |
| 188 | spin_lock_init(&bf->lock32); |
| 189 | bf->uuarn = i; |
| 190 | } |
| 191 | |
| 192 | return 0; |
| 193 | |
| 194 | out_count: |
| 195 | for (i--; i >= 0; i--) { |
| 196 | iounmap(uuari->uars[i].map); |
| 197 | mlx5_cmd_free_uar(dev, uuari->uars[i].index); |
| 198 | } |
| 199 | kfree(uuari->count); |
| 200 | |
| 201 | out_bitmap: |
| 202 | kfree(uuari->bitmap); |
| 203 | |
| 204 | out_bfs: |
| 205 | kfree(uuari->bfs); |
| 206 | |
| 207 | out_uars: |
| 208 | kfree(uuari->uars); |
| 209 | return err; |
| 210 | } |
| 211 | |
| 212 | int mlx5_free_uuars(struct mlx5_core_dev *dev, struct mlx5_uuar_info *uuari) |
| 213 | { |
| 214 | int i = uuari->num_uars; |
| 215 | |
| 216 | for (i--; i >= 0; i--) { |
| 217 | iounmap(uuari->uars[i].map); |
| 218 | mlx5_cmd_free_uar(dev, uuari->uars[i].index); |
| 219 | } |
| 220 | |
| 221 | kfree(uuari->count); |
| 222 | kfree(uuari->bitmap); |
| 223 | kfree(uuari->bfs); |
| 224 | kfree(uuari->uars); |
| 225 | |
| 226 | return 0; |
| 227 | } |
Saeed Mahameed | e281682 | 2015-05-28 22:28:40 +0300 | [diff] [blame] | 228 | |
Moshe Lazer | 0ba4224 | 2016-03-02 00:13:40 +0200 | [diff] [blame] | 229 | int mlx5_alloc_map_uar(struct mlx5_core_dev *mdev, struct mlx5_uar *uar, |
| 230 | bool map_wc) |
Saeed Mahameed | e281682 | 2015-05-28 22:28:40 +0300 | [diff] [blame] | 231 | { |
| 232 | phys_addr_t pfn; |
| 233 | phys_addr_t uar_bar_start; |
| 234 | int err; |
| 235 | |
| 236 | err = mlx5_cmd_alloc_uar(mdev, &uar->index); |
| 237 | if (err) { |
| 238 | mlx5_core_warn(mdev, "mlx5_cmd_alloc_uar() failed, %d\n", err); |
| 239 | return err; |
| 240 | } |
| 241 | |
| 242 | uar_bar_start = pci_resource_start(mdev->pdev, 0); |
| 243 | pfn = (uar_bar_start >> PAGE_SHIFT) + uar->index; |
Saeed Mahameed | e281682 | 2015-05-28 22:28:40 +0300 | [diff] [blame] | 244 | |
Moshe Lazer | 0ba4224 | 2016-03-02 00:13:40 +0200 | [diff] [blame] | 245 | if (map_wc) { |
| 246 | uar->bf_map = ioremap_wc(pfn << PAGE_SHIFT, PAGE_SIZE); |
| 247 | if (!uar->bf_map) { |
| 248 | mlx5_core_warn(mdev, "ioremap_wc() failed\n"); |
| 249 | uar->map = ioremap(pfn << PAGE_SHIFT, PAGE_SIZE); |
| 250 | if (!uar->map) |
| 251 | goto err_free_uar; |
| 252 | } |
| 253 | } else { |
| 254 | uar->map = ioremap(pfn << PAGE_SHIFT, PAGE_SIZE); |
| 255 | if (!uar->map) |
| 256 | goto err_free_uar; |
| 257 | } |
Achiad Shochat | 88a85f9 | 2015-07-23 23:35:59 +0300 | [diff] [blame] | 258 | |
Saeed Mahameed | e281682 | 2015-05-28 22:28:40 +0300 | [diff] [blame] | 259 | return 0; |
| 260 | |
| 261 | err_free_uar: |
Moshe Lazer | 0ba4224 | 2016-03-02 00:13:40 +0200 | [diff] [blame] | 262 | mlx5_core_warn(mdev, "ioremap() failed\n"); |
| 263 | err = -ENOMEM; |
Saeed Mahameed | e281682 | 2015-05-28 22:28:40 +0300 | [diff] [blame] | 264 | mlx5_cmd_free_uar(mdev, uar->index); |
| 265 | |
| 266 | return err; |
| 267 | } |
| 268 | EXPORT_SYMBOL(mlx5_alloc_map_uar); |
| 269 | |
| 270 | void mlx5_unmap_free_uar(struct mlx5_core_dev *mdev, struct mlx5_uar *uar) |
| 271 | { |
Gal Pressman | 5f8a02a | 2016-05-01 22:59:54 +0300 | [diff] [blame] | 272 | if (uar->map) |
| 273 | iounmap(uar->map); |
| 274 | else |
| 275 | iounmap(uar->bf_map); |
Saeed Mahameed | e281682 | 2015-05-28 22:28:40 +0300 | [diff] [blame] | 276 | mlx5_cmd_free_uar(mdev, uar->index); |
| 277 | } |
| 278 | EXPORT_SYMBOL(mlx5_unmap_free_uar); |