2 * Copyright (c) 2006, 2007 Cisco Systems, Inc. All rights reserved.
3 * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
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:
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
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.
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
34 #include <linux/init.h>
35 #include <linux/errno.h>
36 #include <linux/export.h>
37 #include <linux/io-mapping.h>
45 MLX4_NUM_RESERVED_UARS = 8
48 int mlx4_pd_alloc(struct mlx4_dev *dev, u32 *pdn)
50 struct mlx4_priv *priv = mlx4_priv(dev);
52 *pdn = mlx4_bitmap_alloc(&priv->pd_bitmap);
58 EXPORT_SYMBOL_GPL(mlx4_pd_alloc);
60 void mlx4_pd_free(struct mlx4_dev *dev, u32 pdn)
62 mlx4_bitmap_free(&mlx4_priv(dev)->pd_bitmap, pdn);
64 EXPORT_SYMBOL_GPL(mlx4_pd_free);
66 int __mlx4_xrcd_alloc(struct mlx4_dev *dev, u32 *xrcdn)
68 struct mlx4_priv *priv = mlx4_priv(dev);
70 *xrcdn = mlx4_bitmap_alloc(&priv->xrcd_bitmap);
77 int mlx4_xrcd_alloc(struct mlx4_dev *dev, u32 *xrcdn)
82 if (mlx4_is_mfunc(dev)) {
83 err = mlx4_cmd_imm(dev, 0, &out_param,
84 RES_XRCD, RES_OP_RESERVE,
86 MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED);
90 *xrcdn = get_param_l(&out_param);
93 return __mlx4_xrcd_alloc(dev, xrcdn);
95 EXPORT_SYMBOL_GPL(mlx4_xrcd_alloc);
97 void __mlx4_xrcd_free(struct mlx4_dev *dev, u32 xrcdn)
99 mlx4_bitmap_free(&mlx4_priv(dev)->xrcd_bitmap, xrcdn);
102 void mlx4_xrcd_free(struct mlx4_dev *dev, u32 xrcdn)
107 if (mlx4_is_mfunc(dev)) {
108 set_param_l(&in_param, xrcdn);
109 err = mlx4_cmd(dev, in_param, RES_XRCD,
110 RES_OP_RESERVE, MLX4_CMD_FREE_RES,
111 MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED);
113 mlx4_warn(dev, "Failed to release xrcdn %d\n", xrcdn);
115 __mlx4_xrcd_free(dev, xrcdn);
117 EXPORT_SYMBOL_GPL(mlx4_xrcd_free);
119 int mlx4_init_pd_table(struct mlx4_dev *dev)
121 struct mlx4_priv *priv = mlx4_priv(dev);
123 return mlx4_bitmap_init(&priv->pd_bitmap, dev->caps.num_pds,
124 (1 << NOT_MASKED_PD_BITS) - 1,
125 dev->caps.reserved_pds, 0);
128 void mlx4_cleanup_pd_table(struct mlx4_dev *dev)
130 mlx4_bitmap_cleanup(&mlx4_priv(dev)->pd_bitmap);
133 int mlx4_init_xrcd_table(struct mlx4_dev *dev)
135 struct mlx4_priv *priv = mlx4_priv(dev);
137 return mlx4_bitmap_init(&priv->xrcd_bitmap, (1 << 16),
138 (1 << 16) - 1, dev->caps.reserved_xrcds + 1, 0);
141 void mlx4_cleanup_xrcd_table(struct mlx4_dev *dev)
143 mlx4_bitmap_cleanup(&mlx4_priv(dev)->xrcd_bitmap);
146 int mlx4_uar_alloc(struct mlx4_dev *dev, struct mlx4_uar *uar)
150 uar->index = mlx4_bitmap_alloc(&mlx4_priv(dev)->uar_table.bitmap);
151 if (uar->index == -1)
154 if (mlx4_is_slave(dev))
155 offset = uar->index % ((int) pci_resource_len(dev->pdev, 2) /
156 dev->caps.uar_page_size);
159 uar->pfn = (pci_resource_start(dev->pdev, 2) >> PAGE_SHIFT) + offset;
163 EXPORT_SYMBOL_GPL(mlx4_uar_alloc);
165 void mlx4_uar_free(struct mlx4_dev *dev, struct mlx4_uar *uar)
167 mlx4_bitmap_free(&mlx4_priv(dev)->uar_table.bitmap, uar->index);
169 EXPORT_SYMBOL_GPL(mlx4_uar_free);
171 int mlx4_bf_alloc(struct mlx4_dev *dev, struct mlx4_bf *bf)
173 struct mlx4_priv *priv = mlx4_priv(dev);
174 struct mlx4_uar *uar;
178 if (!priv->bf_mapping)
181 mutex_lock(&priv->bf_mutex);
182 if (!list_empty(&priv->bf_list))
183 uar = list_entry(priv->bf_list.next, struct mlx4_uar, bf_list);
185 if (mlx4_bitmap_avail(&priv->uar_table.bitmap) < MLX4_NUM_RESERVED_UARS) {
189 uar = kmalloc(sizeof *uar, GFP_KERNEL);
194 err = mlx4_uar_alloc(dev, uar);
198 uar->map = ioremap(uar->pfn << PAGE_SHIFT, PAGE_SIZE);
204 uar->bf_map = io_mapping_map_wc(priv->bf_mapping, uar->index << PAGE_SHIFT);
209 uar->free_bf_bmap = 0;
210 list_add(&uar->bf_list, &priv->bf_list);
214 idx = ffz(uar->free_bf_bmap);
215 uar->free_bf_bmap |= 1 << idx;
218 bf->buf_size = dev->caps.bf_reg_size / 2;
219 bf->reg = uar->bf_map + idx * dev->caps.bf_reg_size;
220 if (uar->free_bf_bmap == (1 << dev->caps.bf_regs_per_page) - 1)
221 list_del_init(&uar->bf_list);
230 mlx4_uar_free(dev, uar);
236 mutex_unlock(&priv->bf_mutex);
239 EXPORT_SYMBOL_GPL(mlx4_bf_alloc);
241 void mlx4_bf_free(struct mlx4_dev *dev, struct mlx4_bf *bf)
243 struct mlx4_priv *priv = mlx4_priv(dev);
246 if (!bf->uar || !bf->uar->bf_map)
249 mutex_lock(&priv->bf_mutex);
250 idx = (bf->reg - bf->uar->bf_map) / dev->caps.bf_reg_size;
251 bf->uar->free_bf_bmap &= ~(1 << idx);
252 if (!bf->uar->free_bf_bmap) {
253 if (!list_empty(&bf->uar->bf_list))
254 list_del(&bf->uar->bf_list);
256 io_mapping_unmap(bf->uar->bf_map);
257 iounmap(bf->uar->map);
258 mlx4_uar_free(dev, bf->uar);
260 } else if (list_empty(&bf->uar->bf_list))
261 list_add(&bf->uar->bf_list, &priv->bf_list);
263 mutex_unlock(&priv->bf_mutex);
265 EXPORT_SYMBOL_GPL(mlx4_bf_free);
267 int mlx4_init_uar_table(struct mlx4_dev *dev)
269 if (dev->caps.num_uars <= 128) {
270 mlx4_err(dev, "Only %d UAR pages (need more than 128)\n",
272 mlx4_err(dev, "Increase firmware log2_uar_bar_megabytes?\n");
276 return mlx4_bitmap_init(&mlx4_priv(dev)->uar_table.bitmap,
277 dev->caps.num_uars, dev->caps.num_uars - 1,
278 dev->caps.reserved_uars, 0);
281 void mlx4_cleanup_uar_table(struct mlx4_dev *dev)
283 mlx4_bitmap_cleanup(&mlx4_priv(dev)->uar_table.bitmap);