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git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - drivers/char/drm/drm_stub.c
5 * \author Rickard E. (Rik) Faith <faith@valinux.com>
9 * Created: Fri Jan 19 10:48:35 2001 by faith@acm.org
11 * Copyright 2001 VA Linux Systems, Inc., Sunnyvale, California.
12 * All Rights Reserved.
14 * Permission is hereby granted, free of charge, to any person obtaining a
15 * copy of this software and associated documentation files (the "Software"),
16 * to deal in the Software without restriction, including without limitation
17 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
18 * and/or sell copies of the Software, and to permit persons to whom the
19 * Software is furnished to do so, subject to the following conditions:
21 * The above copyright notice and this permission notice (including the next
22 * paragraph) shall be included in all copies or substantial portions of the
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
26 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
27 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
28 * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
29 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
30 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
31 * DEALINGS IN THE SOFTWARE.
34 #include <linux/module.h>
35 #include <linux/moduleparam.h>
39 unsigned int drm_cards_limit
= 16; /* Enough for one machine */
40 unsigned int drm_debug
= 0; /* 1 to enable debug output */
41 EXPORT_SYMBOL(drm_debug
);
43 MODULE_AUTHOR(CORE_AUTHOR
);
44 MODULE_DESCRIPTION(CORE_DESC
);
45 MODULE_LICENSE("GPL and additional rights");
46 MODULE_PARM_DESC(cards_limit
, "Maximum number of graphics cards");
47 MODULE_PARM_DESC(debug
, "Enable debug output");
49 module_param_named(cards_limit
, drm_cards_limit
, int, 0444);
50 module_param_named(debug
, drm_debug
, int, 0600);
52 drm_head_t
**drm_heads
;
53 struct class *drm_class
;
54 struct proc_dir_entry
*drm_proc_root
;
56 static int drm_fill_in_dev(drm_device_t
* dev
, struct pci_dev
*pdev
,
57 const struct pci_device_id
*ent
,
58 struct drm_driver
*driver
)
62 spin_lock_init(&dev
->count_lock
);
63 init_timer(&dev
->timer
);
64 mutex_init(&dev
->struct_mutex
);
65 mutex_init(&dev
->ctxlist_mutex
);
70 dev
->hose
= pdev
->sysdata
;
71 dev
->pci_domain
= dev
->hose
->bus
->number
;
75 dev
->pci_bus
= pdev
->bus
->number
;
76 dev
->pci_slot
= PCI_SLOT(pdev
->devfn
);
77 dev
->pci_func
= PCI_FUNC(pdev
->devfn
);
80 dev
->maplist
= drm_calloc(1, sizeof(*dev
->maplist
), DRM_MEM_MAPS
);
81 if (dev
->maplist
== NULL
)
83 INIT_LIST_HEAD(&dev
->maplist
->head
);
85 /* the DRM has 6 basic counters */
87 dev
->types
[0] = _DRM_STAT_LOCK
;
88 dev
->types
[1] = _DRM_STAT_OPENS
;
89 dev
->types
[2] = _DRM_STAT_CLOSES
;
90 dev
->types
[3] = _DRM_STAT_IOCTLS
;
91 dev
->types
[4] = _DRM_STAT_LOCKS
;
92 dev
->types
[5] = _DRM_STAT_UNLOCKS
;
96 if (dev
->driver
->load
)
97 if ((retcode
= dev
->driver
->load(dev
, ent
->driver_data
)))
100 if (drm_core_has_AGP(dev
)) {
101 if (drm_device_is_agp(dev
))
102 dev
->agp
= drm_agp_init(dev
);
103 if (drm_core_check_feature(dev
, DRIVER_REQUIRE_AGP
)
104 && (dev
->agp
== NULL
)) {
105 DRM_ERROR("Cannot initialize the agpgart module.\n");
107 goto error_out_unreg
;
109 if (drm_core_has_MTRR(dev
)) {
112 mtrr_add(dev
->agp
->agp_info
.aper_base
,
113 dev
->agp
->agp_info
.aper_size
*
114 1024 * 1024, MTRR_TYPE_WRCOMB
, 1);
118 retcode
= drm_ctxbitmap_init(dev
);
120 DRM_ERROR("Cannot allocate memory for context bitmap.\n");
121 goto error_out_unreg
;
133 * Get a secondary minor number.
135 * \param dev device data structure
136 * \param sec-minor structure to hold the assigned minor
137 * \return negative number on failure.
139 * Search an empty entry and initialize it to the given parameters, and
140 * create the proc init entry via proc_init(). This routines assigns
141 * minor numbers to secondary heads of multi-headed cards
143 static int drm_get_head(drm_device_t
* dev
, drm_head_t
* head
)
145 drm_head_t
**heads
= drm_heads
;
151 for (minor
= 0; minor
< drm_cards_limit
; minor
++, heads
++) {
154 *head
= (drm_head_t
) {
156 MKDEV(DRM_MAJOR
, minor
),.minor
= minor
,};
159 drm_proc_init(dev
, minor
, drm_proc_root
,
162 "DRM: Failed to initialize /proc/dri.\n");
166 head
->dev_class
= drm_sysfs_device_add(drm_class
, head
);
167 if (IS_ERR(head
->dev_class
)) {
169 "DRM: Error sysfs_device_add.\n");
170 ret
= PTR_ERR(head
->dev_class
);
175 DRM_DEBUG("new minor assigned %d\n", minor
);
179 DRM_ERROR("out of minors\n");
182 drm_proc_cleanup(minor
, drm_proc_root
, head
->dev_root
);
184 *head
= (drm_head_t
) {
192 * \param pdev - PCI device structure
193 * \param ent entry from the PCI ID table with device type flags
194 * \return zero on success or a negative number on failure.
196 * Attempt to gets inter module "drm" information. If we are first
197 * then register the character device and inter module information.
198 * Try and register, if we fail to register, backout previous work.
200 int drm_get_dev(struct pci_dev
*pdev
, const struct pci_device_id
*ent
,
201 struct drm_driver
*driver
)
208 dev
= drm_calloc(1, sizeof(*dev
), DRM_MEM_STUB
);
212 pci_enable_device(pdev
);
214 if ((ret
= drm_fill_in_dev(dev
, pdev
, ent
, driver
))) {
215 printk(KERN_ERR
"DRM: Fill_in_dev failed.\n");
218 if ((ret
= drm_get_head(dev
, &dev
->primary
)))
221 DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n",
222 driver
->name
, driver
->major
, driver
->minor
, driver
->patchlevel
,
223 driver
->date
, dev
->primary
.minor
);
228 drm_free(dev
, sizeof(*dev
), DRM_MEM_STUB
);
233 * Put a device minor number.
235 * \param dev device data structure
236 * \return always zero
238 * Cleans up the proc resources. If it is the last minor then release the foreign
239 * "drm" data, otherwise unregisters the "drm" data, frees the dev list and
240 * unregisters the character device.
242 int drm_put_dev(drm_device_t
* dev
)
244 DRM_DEBUG("release primary %s\n", dev
->driver
->pci_driver
.name
);
247 drm_free(dev
->unique
, strlen(dev
->unique
) + 1, DRM_MEM_DRIVER
);
252 drm_free(dev
->devname
, strlen(dev
->devname
) + 1,
256 drm_free(dev
, sizeof(*dev
), DRM_MEM_STUB
);
261 * Put a secondary minor number.
263 * \param sec_minor - structure to be released
264 * \return always zero
266 * Cleans up the proc resources. Not legal for this to be the
267 * last minor released.
270 int drm_put_head(drm_head_t
* head
)
272 int minor
= head
->minor
;
274 DRM_DEBUG("release secondary minor %d\n", minor
);
276 drm_proc_cleanup(minor
, drm_proc_root
, head
->dev_root
);
277 drm_sysfs_device_remove(head
->dev_class
);
279 *head
= (drm_head_t
) {.dev
= NULL
};
281 drm_heads
[minor
] = NULL
;