1 /*
2 * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
3 * Use is subject to license terms.
4 */
5
6 /*
7 * drm_memory.h -- Memory management wrappers for DRM -*- linux-c -*-
8 * Created: Thu Feb 4 14:00:34 1999 by faith@valinux.com
9 */
10 /*
11 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
12 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
13 * Copyright (c) 2009, Intel Corporation.
14 * All Rights Reserved.
15 *
16 * Permission is hereby granted, free of charge, to any person obtaining a
17 * copy of this software and associated documentation files (the "Software"),
18 * to deal in the Software without restriction, including without limitation
19 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
20 * and/or sell copies of the Software, and to permit persons to whom the
21 * Software is furnished to do so, subject to the following conditions:
22 *
23 * The above copyright notice and this permission notice (including the next
24 * paragraph) shall be included in all copies or substantial portions of the
25 * Software.
26 *
27 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
28 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
29 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
30 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
31 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
32 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
33 * OTHER DEALINGS IN THE SOFTWARE.
34 *
35 * Authors:
36 * Rickard E. (Rik) Faith <faith@valinux.com>
37 * Gareth Hughes <gareth@valinux.com>
38 *
39 */
40
41 #include "drmP.h"
42
43 /* Device memory access structure */
44 typedef struct drm_device_iomap {
45 uint_t physical; /* physical address */
46 uint_t size; /* size of mapping */
47 uint_t drm_regnum; /* register number */
48 caddr_t drm_base; /* kernel virtual address */
49 ddi_acc_handle_t drm_handle; /* data access handle */
50 } drm_device_iomap_t;
51
52 void
53 drm_mem_init(void)
54 {
55 }
56
57 void
58 drm_mem_uninit(void)
59 {
60 }
61
62 /*ARGSUSED*/
63 void *
64 drm_alloc(size_t size, int area)
65 {
66 return (kmem_zalloc(1 * size, KM_NOSLEEP));
67 }
68
69 /*ARGSUSED*/
70 void *
71 drm_calloc(size_t nmemb, size_t size, int area)
72 {
73 return (kmem_zalloc(size * nmemb, KM_NOSLEEP));
74 }
75
76 /*ARGSUSED*/
77 void *
78 drm_realloc(void *oldpt, size_t oldsize, size_t size, int area)
79 {
80 void *pt;
81
82 pt = kmem_zalloc(1 * size, KM_NOSLEEP);
83 if (pt == NULL) {
84 DRM_ERROR("pt is NULL strange");
85 return (NULL);
86 }
87 if (oldpt && oldsize) {
88 bcopy(pt, oldpt, oldsize);
89 kmem_free(oldpt, oldsize);
90 }
91 return (pt);
92 }
93
94 /*ARGSUSED*/
95 void
96 drm_free(void *pt, size_t size, int area)
97 {
98 kmem_free(pt, size);
99 }
100
101 /*ARGSUSED*/
102 int
103 drm_get_pci_index_reg(dev_info_t *devi, uint_t physical, uint_t size,
104 off_t *off)
105 {
106 int length;
107 pci_regspec_t *regs;
108 int n_reg, i;
109 int regnum;
110 uint_t base, regsize;
111
112 regnum = -1;
113
114 if (ddi_dev_nregs(devi, &n_reg) == DDI_FAILURE) {
115 DRM_ERROR("drm_get_pci_index_reg:ddi_dev_nregs failed\n");
116 n_reg = 0;
117 return (-1);
118 }
119
120 if (ddi_getlongprop(DDI_DEV_T_ANY, devi, DDI_PROP_DONTPASS,
121 "assigned-addresses", (caddr_t)®s, &length) !=
122 DDI_PROP_SUCCESS) {
123 DRM_ERROR("drm_get_pci_index_reg: ddi_getlongprop failed!\n");
124 goto error;
125 }
126
127 for (i = 0; i < n_reg; i ++) {
128 base = (uint_t)regs[i].pci_phys_low;
129 regsize = (uint_t)regs[i].pci_size_low;
130 if ((uint_t)physical >= base &&
131 (uint_t)physical < (base + regsize)) {
132 regnum = i + 1;
133 *off = (off_t)(physical - base);
134 break;
135 }
136 }
137
138 kmem_free(regs, (size_t)length);
139 return (regnum);
140 error:
141 kmem_free(regs, (size_t)length);
142 return (-1);
143 }
144
145 /* data access attributes structure for register access */
146 static ddi_device_acc_attr_t dev_attr = {
147 DDI_DEVICE_ATTR_V0,
148 DDI_NEVERSWAP_ACC,
149 DDI_STRICTORDER_ACC,
150 };
151
152 int
153 do_ioremap(dev_info_t *devi, drm_device_iomap_t *iomap)
154 {
155 int regnum;
156 off_t offset;
157 int ret;
158
159 regnum = drm_get_pci_index_reg(devi, iomap->physical,
160 iomap->size, &offset);
161 if (regnum < 0) {
162 DRM_ERROR("do_ioremap: can not find regster entry,"
163 " start=0x%x, size=0x%x", iomap->physical, iomap->size);
164 return (ENXIO);
165 }
166
167 iomap->drm_regnum = regnum;
168
169 ret = ddi_regs_map_setup(devi, iomap->drm_regnum,
170 (caddr_t *)&(iomap->drm_base), (offset_t)offset,
171 (offset_t)iomap->size, &dev_attr, &iomap->drm_handle);
172 if (ret < 0) {
173 DRM_ERROR("do_ioremap: failed to map regs: regno=%d,"
174 " offset=0x%x", regnum, offset);
175 iomap->drm_handle = NULL;
176 return (EFAULT);
177 }
178
179 return (0);
180 }
181
182 int
183 drm_ioremap(drm_device_t *softstate, drm_local_map_t *map)
184 {
185 drm_device_iomap_t iomap;
186 int ret;
187
188 DRM_DEBUG("drm_ioremap called\n");
189
190 bzero(&iomap, sizeof (drm_device_iomap_t));
191 iomap.physical = map->offset;
192 iomap.size = map->size;
193 ret = do_ioremap(softstate->dip, &iomap);
194
195 if (ret) {
196 DRM_ERROR("drm_ioremap: failed, physaddr=0x%x, size=0x%x",
197 map->offset, map->size);
198 return (ret);
199 }
200
201 /* ddi_acc_handle_t */
202 map->dev_handle = iomap.drm_handle;
203 map->handle = (void *)iomap.drm_base;
204 map->dev_addr = iomap.drm_base;
205
206 DRM_DEBUG(
207 "map->handle is %p map->dev_addr is %lx map->size %x",
208 (void *)map->handle, (unsigned long)map->dev_addr, map->size);
209
210 return (0);
211 }
212
213 void
214 drm_ioremapfree(drm_local_map_t *map)
215 {
216 if (map->dev_handle == NULL) {
217 DRM_ERROR("drm_ioremapfree: handle is NULL");
218 return;
219 }
220 ddi_regs_map_free(&map->dev_handle);
221 }