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 */
44typedef 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
52void
53drm_mem_init(void)
54{
55}
56
57void
58drm_mem_uninit(void)
59{
60}
61
62/*ARGSUSED*/
63void *
64drm_alloc(size_t size, int area)
65{
66	return (kmem_zalloc(1 * size, KM_NOSLEEP));
67}
68
69/*ARGSUSED*/
70void *
71drm_calloc(size_t nmemb, size_t size, int area)
72{
73	return (kmem_zalloc(size * nmemb, KM_NOSLEEP));
74}
75
76/*ARGSUSED*/
77void *
78drm_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*/
95void
96drm_free(void *pt, size_t size, int area)
97{
98	kmem_free(pt, size);
99}
100
101/*ARGSUSED*/
102int
103drm_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)&regs, &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);
140error:
141	kmem_free(regs, (size_t)length);
142	return (-1);
143}
144
145/* data access attributes structure for register access */
146static ddi_device_acc_attr_t dev_attr = {
147	DDI_DEVICE_ATTR_V0,
148	DDI_NEVERSWAP_ACC,
149	DDI_STRICTORDER_ACC,
150};
151
152int
153do_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
182int
183drm_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
213void
214drm_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}
222