pd.c revision 271127 
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/io-mapping.h>
36
37#include <asm/page.h>
38
39#include "mlx4.h"
40#include "icm.h"
41
42enum {
43	MLX4_NUM_RESERVED_UARS = 8
44};
45
46int mlx4_pd_alloc(struct mlx4_dev *dev, u32 *pdn)
47{
48	struct mlx4_priv *priv = mlx4_priv(dev);
49
50	*pdn = mlx4_bitmap_alloc(&priv->pd_bitmap);
51	if (*pdn == -1)
52		return -ENOMEM;
53
54	return 0;
55}
56EXPORT_SYMBOL_GPL(mlx4_pd_alloc);
57
58void mlx4_pd_free(struct mlx4_dev *dev, u32 pdn)
59{
60	mlx4_bitmap_free(&mlx4_priv(dev)->pd_bitmap, pdn);
61}
62EXPORT_SYMBOL_GPL(mlx4_pd_free);
63
64int __mlx4_xrcd_alloc(struct mlx4_dev *dev, u32 *xrcdn)
65{
66	struct mlx4_priv *priv = mlx4_priv(dev);
67
68	*xrcdn = mlx4_bitmap_alloc(&priv->xrcd_bitmap);
69	if (*xrcdn == -1)
70		return -ENOMEM;
71
72	return 0;
73}
74
75int mlx4_xrcd_alloc(struct mlx4_dev *dev, u32 *xrcdn)
76{
77	u64 out_param;
78	int err;
79
80	if (mlx4_is_mfunc(dev)) {
81		err = mlx4_cmd_imm(dev, 0, &out_param,
82				   RES_XRCD, RES_OP_RESERVE,
83				   MLX4_CMD_ALLOC_RES,
84				   MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED);
85		if (err)
86			return err;
87
88		*xrcdn = get_param_l(&out_param);
89		return 0;
90	}
91	return __mlx4_xrcd_alloc(dev, xrcdn);
92}
93EXPORT_SYMBOL_GPL(mlx4_xrcd_alloc);
94
95void __mlx4_xrcd_free(struct mlx4_dev *dev, u32 xrcdn)
96{
97	mlx4_bitmap_free(&mlx4_priv(dev)->xrcd_bitmap, xrcdn);
98}
99
100void mlx4_xrcd_free(struct mlx4_dev *dev, u32 xrcdn)
101{
102	u64 in_param = 0;
103	int err;
104
105	if (mlx4_is_mfunc(dev)) {
106		set_param_l(&in_param, xrcdn);
107		err = mlx4_cmd(dev, in_param, RES_XRCD,
108			       RES_OP_RESERVE, MLX4_CMD_FREE_RES,
109			       MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED);
110		if (err)
111			mlx4_warn(dev, "Failed to release xrcdn %d\n", xrcdn);
112	} else
113		__mlx4_xrcd_free(dev, xrcdn);
114}
115EXPORT_SYMBOL_GPL(mlx4_xrcd_free);
116
117int mlx4_init_pd_table(struct mlx4_dev *dev)
118{
119	struct mlx4_priv *priv = mlx4_priv(dev);
120
121	return mlx4_bitmap_init(&priv->pd_bitmap, dev->caps.num_pds,
122				(1 << NOT_MASKED_PD_BITS) - 1,
123				 dev->caps.reserved_pds, 0);
124}
125
126void mlx4_cleanup_pd_table(struct mlx4_dev *dev)
127{
128	mlx4_bitmap_cleanup(&mlx4_priv(dev)->pd_bitmap);
129}
130
131int mlx4_init_xrcd_table(struct mlx4_dev *dev)
132{
133	struct mlx4_priv *priv = mlx4_priv(dev);
134
135	return mlx4_bitmap_init(&priv->xrcd_bitmap, (1 << 16),
136				(1 << 16) - 1, dev->caps.reserved_xrcds + 1, 0);
137}
138
139void mlx4_cleanup_xrcd_table(struct mlx4_dev *dev)
140{
141	mlx4_bitmap_cleanup(&mlx4_priv(dev)->xrcd_bitmap);
142}
143
144int mlx4_uar_alloc(struct mlx4_dev *dev, struct mlx4_uar *uar)
145{
146	int offset;
147
148	uar->index = mlx4_bitmap_alloc(&mlx4_priv(dev)->uar_table.bitmap);
149	if (uar->index == -1)
150		return -ENOMEM;
151
152	if (mlx4_is_slave(dev))
153		offset = uar->index % ((int) pci_resource_len(dev->pdev, 2) /
154				       dev->caps.uar_page_size);
155	else
156		offset = uar->index;
157	uar->pfn = (pci_resource_start(dev->pdev, 2) >> PAGE_SHIFT) + offset;
158	uar->map = NULL;
159	return 0;
160}
161EXPORT_SYMBOL_GPL(mlx4_uar_alloc);
162
163void mlx4_uar_free(struct mlx4_dev *dev, struct mlx4_uar *uar)
164{
165	mlx4_bitmap_free(&mlx4_priv(dev)->uar_table.bitmap, uar->index);
166}
167EXPORT_SYMBOL_GPL(mlx4_uar_free);
168
169#ifndef CONFIG_PPC
170int 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
227unamp_uar:
228	bf->uar = NULL;
229	iounmap(uar->map);
230
231free_uar:
232	mlx4_uar_free(dev, uar);
233
234free_kmalloc:
235	kfree(uar);
236
237out:
238	mutex_unlock(&priv->bf_mutex);
239	return err;
240}
241EXPORT_SYMBOL_GPL(mlx4_bf_alloc);
242
243void 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}
267EXPORT_SYMBOL_GPL(mlx4_bf_free);
268
269#else
270int mlx4_bf_alloc(struct mlx4_dev *dev, struct mlx4_bf *bf, int node)
271{
272	memset(bf, 0, sizeof *bf);
273	return -ENOSYS;
274}
275EXPORT_SYMBOL_GPL(mlx4_bf_alloc);
276
277void mlx4_bf_free(struct mlx4_dev *dev, struct mlx4_bf *bf)
278{
279       return;
280}
281EXPORT_SYMBOL_GPL(mlx4_bf_free);
282#endif
283
284int mlx4_init_uar_table(struct mlx4_dev *dev)
285{
286	if (dev->caps.num_uars <= 128) {
287		mlx4_err(dev, "Only %d UAR pages (need more than 128)\n",
288			 dev->caps.num_uars);
289		mlx4_err(dev, "Increase firmware log2_uar_bar_megabytes?\n");
290		return -ENODEV;
291	}
292
293	return mlx4_bitmap_init(&mlx4_priv(dev)->uar_table.bitmap,
294				dev->caps.num_uars, dev->caps.num_uars - 1,
295				dev->caps.reserved_uars, 0);
296}
297
298void mlx4_cleanup_uar_table(struct mlx4_dev *dev)
299{
300	mlx4_bitmap_cleanup(&mlx4_priv(dev)->uar_table.bitmap);
301}
302