Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 | /*
* Copyright 2003 José Fonseca.
* Copyright 2003 Leif Delgass.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <linux/dma-mapping.h>
#include <linux/export.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <drm/drm.h>
#include <drm/drm_agpsupport.h>
#include <drm/drm_drv.h>
#include <drm/drm_pci.h>
#include <drm/drm_print.h>
#include "drm_internal.h"
#include "drm_legacy.h"
/**
* drm_pci_alloc - Allocate a PCI consistent memory block, for DMA.
* @dev: DRM device
* @size: size of block to allocate
* @align: alignment of block
*
* FIXME: This is a needless abstraction of the Linux dma-api and should be
* removed.
*
* Return: A handle to the allocated memory block on success or NULL on
* failure.
*/
drm_dma_handle_t *drm_pci_alloc(struct drm_device * dev, size_t size, size_t align)
{
drm_dma_handle_t *dmah;
/* pci_alloc_consistent only guarantees alignment to the smallest
* PAGE_SIZE order which is greater than or equal to the requested size.
* Return NULL here for now to make sure nobody tries for larger alignment
*/
if (align > size)
return NULL;
dmah = kmalloc(sizeof(drm_dma_handle_t), GFP_KERNEL);
if (!dmah)
return NULL;
dmah->size = size;
dmah->vaddr = dma_alloc_coherent(&dev->pdev->dev, size,
&dmah->busaddr,
GFP_KERNEL);
if (dmah->vaddr == NULL) {
kfree(dmah);
return NULL;
}
return dmah;
}
EXPORT_SYMBOL(drm_pci_alloc);
/**
* drm_pci_free - Free a PCI consistent memory block
* @dev: DRM device
* @dmah: handle to memory block
*
* FIXME: This is a needless abstraction of the Linux dma-api and should be
* removed.
*/
void drm_pci_free(struct drm_device * dev, drm_dma_handle_t * dmah)
{
dma_free_coherent(&dev->pdev->dev, dmah->size, dmah->vaddr,
dmah->busaddr);
kfree(dmah);
}
EXPORT_SYMBOL(drm_pci_free);
static int drm_get_pci_domain(struct drm_device *dev)
{
#ifndef __alpha__
/* For historical reasons, drm_get_pci_domain() is busticated
* on most archs and has to remain so for userspace interface
* < 1.4, except on alpha which was right from the beginning
*/
if (dev->if_version < 0x10004)
return 0;
#endif /* __alpha__ */
return pci_domain_nr(dev->pdev->bus);
}
int drm_pci_set_busid(struct drm_device *dev, struct drm_master *master)
{
master->unique = kasprintf(GFP_KERNEL, "pci:%04x:%02x:%02x.%d",
drm_get_pci_domain(dev),
dev->pdev->bus->number,
PCI_SLOT(dev->pdev->devfn),
PCI_FUNC(dev->pdev->devfn));
if (!master->unique)
return -ENOMEM;
master->unique_len = strlen(master->unique);
return 0;
}
static int drm_pci_irq_by_busid(struct drm_device *dev, struct drm_irq_busid *p)
{
if ((p->busnum >> 8) != drm_get_pci_domain(dev) ||
(p->busnum & 0xff) != dev->pdev->bus->number ||
p->devnum != PCI_SLOT(dev->pdev->devfn) || p->funcnum != PCI_FUNC(dev->pdev->devfn))
return -EINVAL;
p->irq = dev->pdev->irq;
DRM_DEBUG("%d:%d:%d => IRQ %d\n", p->busnum, p->devnum, p->funcnum,
p->irq);
return 0;
}
/**
* drm_irq_by_busid - Get interrupt from bus ID
* @dev: DRM device
* @data: IOCTL parameter pointing to a drm_irq_busid structure
* @file_priv: DRM file private.
*
* Finds the PCI device with the specified bus id and gets its IRQ number.
* This IOCTL is deprecated, and will now return EINVAL for any busid not equal
* to that of the device that this DRM instance attached to.
*
* Return: 0 on success or a negative error code on failure.
*/
int drm_irq_by_busid(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_irq_busid *p = data;
if (!drm_core_check_feature(dev, DRIVER_LEGACY))
return -EOPNOTSUPP;
/* UMS was only ever support on PCI devices. */
if (WARN_ON(!dev->pdev))
return -EINVAL;
if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ))
return -EOPNOTSUPP;
return drm_pci_irq_by_busid(dev, p);
}
void drm_pci_agp_destroy(struct drm_device *dev)
{
if (dev->agp) {
arch_phys_wc_del(dev->agp->agp_mtrr);
drm_legacy_agp_clear(dev);
kfree(dev->agp);
dev->agp = NULL;
}
}
#ifdef CONFIG_DRM_LEGACY
static void drm_pci_agp_init(struct drm_device *dev)
{
if (drm_core_check_feature(dev, DRIVER_USE_AGP)) {
if (pci_find_capability(dev->pdev, PCI_CAP_ID_AGP))
dev->agp = drm_agp_init(dev);
if (dev->agp) {
dev->agp->agp_mtrr = arch_phys_wc_add(
dev->agp->agp_info.aper_base,
dev->agp->agp_info.aper_size *
1024 * 1024);
}
}
}
static int drm_get_pci_dev(struct pci_dev *pdev,
const struct pci_device_id *ent,
struct drm_driver *driver)
{
struct drm_device *dev;
int ret;
DRM_DEBUG("\n");
dev = drm_dev_alloc(driver, &pdev->dev);
if (IS_ERR(dev))
return PTR_ERR(dev);
ret = pci_enable_device(pdev);
if (ret)
goto err_free;
dev->pdev = pdev;
#ifdef __alpha__
dev->hose = pdev->sysdata;
#endif
if (drm_core_check_feature(dev, DRIVER_MODESET))
pci_set_drvdata(pdev, dev);
drm_pci_agp_init(dev);
ret = drm_dev_register(dev, ent->driver_data);
if (ret)
goto err_agp;
/* No locking needed since shadow-attach is single-threaded since it may
* only be called from the per-driver module init hook. */
if (drm_core_check_feature(dev, DRIVER_LEGACY))
list_add_tail(&dev->legacy_dev_list, &driver->legacy_dev_list);
return 0;
err_agp:
drm_pci_agp_destroy(dev);
pci_disable_device(pdev);
err_free:
drm_dev_put(dev);
return ret;
}
/**
* drm_legacy_pci_init - shadow-attach a legacy DRM PCI driver
* @driver: DRM device driver
* @pdriver: PCI device driver
*
* This is only used by legacy dri1 drivers and deprecated.
*
* Return: 0 on success or a negative error code on failure.
*/
int drm_legacy_pci_init(struct drm_driver *driver, struct pci_driver *pdriver)
{
struct pci_dev *pdev = NULL;
const struct pci_device_id *pid;
int i;
DRM_DEBUG("\n");
if (WARN_ON(!(driver->driver_features & DRIVER_LEGACY)))
return -EINVAL;
/* If not using KMS, fall back to stealth mode manual scanning. */
INIT_LIST_HEAD(&driver->legacy_dev_list);
for (i = 0; pdriver->id_table[i].vendor != 0; i++) {
pid = &pdriver->id_table[i];
/* Loop around setting up a DRM device for each PCI device
* matching our ID and device class. If we had the internal
* function that pci_get_subsys and pci_get_class used, we'd
* be able to just pass pid in instead of doing a two-stage
* thing.
*/
pdev = NULL;
while ((pdev =
pci_get_subsys(pid->vendor, pid->device, pid->subvendor,
pid->subdevice, pdev)) != NULL) {
if ((pdev->class & pid->class_mask) != pid->class)
continue;
/* stealth mode requires a manual probe */
pci_dev_get(pdev);
drm_get_pci_dev(pdev, pid, driver);
}
}
return 0;
}
EXPORT_SYMBOL(drm_legacy_pci_init);
/**
* drm_legacy_pci_exit - unregister shadow-attach legacy DRM driver
* @driver: DRM device driver
* @pdriver: PCI device driver
*
* Unregister a DRM driver shadow-attached through drm_legacy_pci_init(). This
* is deprecated and only used by dri1 drivers.
*/
void drm_legacy_pci_exit(struct drm_driver *driver, struct pci_driver *pdriver)
{
struct drm_device *dev, *tmp;
DRM_DEBUG("\n");
if (!(driver->driver_features & DRIVER_LEGACY)) {
WARN_ON(1);
} else {
list_for_each_entry_safe(dev, tmp, &driver->legacy_dev_list,
legacy_dev_list) {
list_del(&dev->legacy_dev_list);
drm_put_dev(dev);
}
}
DRM_INFO("Module unloaded\n");
}
EXPORT_SYMBOL(drm_legacy_pci_exit);
#endif
|