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freebsd-nq/sys/dev/drm/drm_vm.h

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Add the code for the DRM, based on the code from the drm-kmod port. This is not hooked up yet, that will come later. Approved by: des
2002-04-27 20:47:57 +00:00
/*
* $FreeBSD$
*/
#include <vm/vm.h>
#include <vm/pmap.h>
Cleanup of the d_mmap_t interface. - Get rid of the useless atop() / pmap_phys_address() detour. The device mmap handlers must now give back the physical address without atop()'ing it. - Don't borrow the physical address of the mapping in the returned int. Now we properly pass a vm_offset_t * and expect it to be filled by the mmap handler when the mapping was successful. The mmap handler must now return 0 when successful, any other value is considered as an error. Previously, returning -1 was the only way to fail. This change thus accidentally fixes some devices which were bogusly returning errno constants which would have been considered as addresses by the device pager. - Garbage collect the poorly named pmap_phys_address() now that it's no longer used. - Convert all the d_mmap_t consumers to the new API. I'm still not sure wheter we need a __FreeBSD_version bump for this, since and we didn't guarantee API/ABI stability until 5.1-RELEASE. Discussed with: alc, phk, jake Reviewed by: peter Compile-tested on: LINT (i386), GENERIC (alpha and sparc64) Runtime-tested on: i386
2003-02-25 03:21:22 +00:00
static int DRM(dma_mmap)(dev_t kdev, vm_offset_t offset, vm_offset_t *paddr,
int prot)
Add the code for the DRM, based on the code from the drm-kmod port. This is not hooked up yet, that will come later. Approved by: des
2002-04-27 20:47:57 +00:00
{
drm_device_t *dev = kdev->si_drv1;
drm_device_dma_t *dma = dev->dma;
unsigned long physical;
unsigned long page;
if (!dma) return -1; /* Error */
if (!dma->pagelist) return -1; /* Nothing allocated */
page = offset >> PAGE_SHIFT;
physical = dma->pagelist[page];
DRM_DEBUG("0x%08x (page %lu) => 0x%08lx\n", offset, page, physical);
Cleanup of the d_mmap_t interface. - Get rid of the useless atop() / pmap_phys_address() detour. The device mmap handlers must now give back the physical address without atop()'ing it. - Don't borrow the physical address of the mapping in the returned int. Now we properly pass a vm_offset_t * and expect it to be filled by the mmap handler when the mapping was successful. The mmap handler must now return 0 when successful, any other value is considered as an error. Previously, returning -1 was the only way to fail. This change thus accidentally fixes some devices which were bogusly returning errno constants which would have been considered as addresses by the device pager. - Garbage collect the poorly named pmap_phys_address() now that it's no longer used. - Convert all the d_mmap_t consumers to the new API. I'm still not sure wheter we need a __FreeBSD_version bump for this, since and we didn't guarantee API/ABI stability until 5.1-RELEASE. Discussed with: alc, phk, jake Reviewed by: peter Compile-tested on: LINT (i386), GENERIC (alpha and sparc64) Runtime-tested on: i386
2003-02-25 03:21:22 +00:00
*paddr = physical;
return 0;
Add the code for the DRM, based on the code from the drm-kmod port. This is not hooked up yet, that will come later. Approved by: des
2002-04-27 20:47:57 +00:00
}
Cleanup of the d_mmap_t interface. - Get rid of the useless atop() / pmap_phys_address() detour. The device mmap handlers must now give back the physical address without atop()'ing it. - Don't borrow the physical address of the mapping in the returned int. Now we properly pass a vm_offset_t * and expect it to be filled by the mmap handler when the mapping was successful. The mmap handler must now return 0 when successful, any other value is considered as an error. Previously, returning -1 was the only way to fail. This change thus accidentally fixes some devices which were bogusly returning errno constants which would have been considered as addresses by the device pager. - Garbage collect the poorly named pmap_phys_address() now that it's no longer used. - Convert all the d_mmap_t consumers to the new API. I'm still not sure wheter we need a __FreeBSD_version bump for this, since and we didn't guarantee API/ABI stability until 5.1-RELEASE. Discussed with: alc, phk, jake Reviewed by: peter Compile-tested on: LINT (i386), GENERIC (alpha and sparc64) Runtime-tested on: i386
2003-02-25 03:21:22 +00:00
int DRM(mmap)(dev_t kdev, vm_offset_t offset, vm_offset_t *paddr, int prot)
Add the code for the DRM, based on the code from the drm-kmod port. This is not hooked up yet, that will come later. Approved by: des
2002-04-27 20:47:57 +00:00
{
drm_device_t *dev = kdev->si_drv1;
drm_map_t *map = NULL;
drm_map_list_entry_t *listentry=NULL;
/*drm_file_t *priv;*/
/* DRM_DEBUG("offset = 0x%x\n", offset);*/
/*XXX Fixme */
/*priv = DRM(find_file_by_proc)(dev, p);
if (!priv) {
DRM_DEBUG("can't find authenticator\n");
return EINVAL;
}
Diff reduction to my experimental code: clean up return code handling. Approved by: des
2002-04-29 00:25:10 +00:00
if (!priv->authenticated) return DRM_OS_ERR(EACCES);*/
Add the code for the DRM, based on the code from the drm-kmod port. This is not hooked up yet, that will come later. Approved by: des
2002-04-27 20:47:57 +00:00
if (dev->dma
&& offset >= 0
&& offset < ptoa(dev->dma->page_count))
Cleanup of the d_mmap_t interface. - Get rid of the useless atop() / pmap_phys_address() detour. The device mmap handlers must now give back the physical address without atop()'ing it. - Don't borrow the physical address of the mapping in the returned int. Now we properly pass a vm_offset_t * and expect it to be filled by the mmap handler when the mapping was successful. The mmap handler must now return 0 when successful, any other value is considered as an error. Previously, returning -1 was the only way to fail. This change thus accidentally fixes some devices which were bogusly returning errno constants which would have been considered as addresses by the device pager. - Garbage collect the poorly named pmap_phys_address() now that it's no longer used. - Convert all the d_mmap_t consumers to the new API. I'm still not sure wheter we need a __FreeBSD_version bump for this, since and we didn't guarantee API/ABI stability until 5.1-RELEASE. Discussed with: alc, phk, jake Reviewed by: peter Compile-tested on: LINT (i386), GENERIC (alpha and sparc64) Runtime-tested on: i386
2003-02-25 03:21:22 +00:00
return DRM(dma_mmap)(kdev, offset, paddr, prot);
Add the code for the DRM, based on the code from the drm-kmod port. This is not hooked up yet, that will come later. Approved by: des
2002-04-27 20:47:57 +00:00
/* A sequential search of a linked list is
fine here because: 1) there will only be
about 5-10 entries in the list and, 2) a
DRI client only has to do this mapping
once, so it doesn't have to be optimized
for performance, even if the list was a
bit longer. */
TAILQ_FOREACH(listentry, dev->maplist, link) {
map = listentry->map;
/* DRM_DEBUG("considering 0x%x..0x%x\n", map->offset, map->offset + map->size - 1);*/
if (offset >= map->offset
&& offset < map->offset + map->size) break;
}
if (!listentry) {
DRM_DEBUG("can't find map\n");
return -1;
}
if (((map->flags&_DRM_RESTRICTED) && suser(DRM_OS_CURPROC))) {
DRM_DEBUG("restricted map\n");
return -1;
}
switch (map->type) {
case _DRM_FRAME_BUFFER:
case _DRM_REGISTERS:
case _DRM_AGP:
Cleanup of the d_mmap_t interface. - Get rid of the useless atop() / pmap_phys_address() detour. The device mmap handlers must now give back the physical address without atop()'ing it. - Don't borrow the physical address of the mapping in the returned int. Now we properly pass a vm_offset_t * and expect it to be filled by the mmap handler when the mapping was successful. The mmap handler must now return 0 when successful, any other value is considered as an error. Previously, returning -1 was the only way to fail. This change thus accidentally fixes some devices which were bogusly returning errno constants which would have been considered as addresses by the device pager. - Garbage collect the poorly named pmap_phys_address() now that it's no longer used. - Convert all the d_mmap_t consumers to the new API. I'm still not sure wheter we need a __FreeBSD_version bump for this, since and we didn't guarantee API/ABI stability until 5.1-RELEASE. Discussed with: alc, phk, jake Reviewed by: peter Compile-tested on: LINT (i386), GENERIC (alpha and sparc64) Runtime-tested on: i386
2003-02-25 03:21:22 +00:00
*paddr = offset;
return 0;
Add the code for the DRM, based on the code from the drm-kmod port. This is not hooked up yet, that will come later. Approved by: des
2002-04-27 20:47:57 +00:00
case _DRM_SHM:
Cleanup of the d_mmap_t interface. - Get rid of the useless atop() / pmap_phys_address() detour. The device mmap handlers must now give back the physical address without atop()'ing it. - Don't borrow the physical address of the mapping in the returned int. Now we properly pass a vm_offset_t * and expect it to be filled by the mmap handler when the mapping was successful. The mmap handler must now return 0 when successful, any other value is considered as an error. Previously, returning -1 was the only way to fail. This change thus accidentally fixes some devices which were bogusly returning errno constants which would have been considered as addresses by the device pager. - Garbage collect the poorly named pmap_phys_address() now that it's no longer used. - Convert all the d_mmap_t consumers to the new API. I'm still not sure wheter we need a __FreeBSD_version bump for this, since and we didn't guarantee API/ABI stability until 5.1-RELEASE. Discussed with: alc, phk, jake Reviewed by: peter Compile-tested on: LINT (i386), GENERIC (alpha and sparc64) Runtime-tested on: i386
2003-02-25 03:21:22 +00:00
*paddr = vtophys(offset);
return 0;
Add the code for the DRM, based on the code from the drm-kmod port. This is not hooked up yet, that will come later. Approved by: des
2002-04-27 20:47:57 +00:00
default:
return -1; /* This should never happen. */
}
DRM_DEBUG("bailing out\n");
return -1;
}
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