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path: root/bsd-core/drm_drv.c
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2008-06-08[FreeBSD] We need to request busmastering support.Robert Noland
This seems to be the key to getting at least some radeon cards working. Most, if not all drivers need it enabled, so just request it once the driver has attached.
2008-06-08[FreeBSD] Forgot to call mtx_destroy on all the locks at unload.Robert Noland
2008-06-08[FreeBSD] Go back to using vbl_lock and move init/destroy to load/unload.Robert Noland
2008-05-27[FreeBSD] Convert from drm_device_t to struct drm_device for consistency.Eric Anholt
2007-12-01mtx_sleep is preferred to msleepRobert Noland
Calling semantics are the same and both were introduced in 5.0
2007-12-01drm: Add _DRM_DRIVER map flag.Robert Noland
This flag indicates that the driver is responsible for the map.
2007-12-01bsd: Move counter initialization to load time.Robert Noland
2007-10-17Bug #11870: FreeBSD hardware lock cleanup fix with multiple opens by a process.Jung-uk Kim
Previously, the lock would get released on the first close by the X Server (during AIGLX setup), and the Radeon driver would then hang in initialization due to unexpected failure in DRM calls that required the lock to be held. Based on a patch by Kostik Belousov.
2007-10-10FreeBSD: Fill in domain field when supported.Eric Anholt
2007-08-15BSD: simplify drm_ioctl() after other refactoring.vehemens
2007-08-15BSD: Replace brief description in each file's first line with doxygen later on.Eric Anholt
The brief descriptions usually had the wrong filename in them.
2007-07-20Replace DRM_IOCTL_ARGS with (dev, data, file_priv) and remove DRM_DEVICE.Eric Anholt
The data is now in kernel space, copied in/out as appropriate according to the This results in DRM_COPY_{TO,FROM}_USER going away, and error paths to deal with those failures. This also means that XFree86 4.2.0 support for i810 DRM is lost.
2007-07-20Replace filp in ioctl arguments with drm_file *file_priv.Eric Anholt
As a fallout, replace filp storage with file_priv storage for "unique identifier of a client" all over the DRM. There is a 1:1 mapping, so this should be a noop. This could be a minor performance improvement, as everything on Linux dereferenced filp to get file_priv anyway, while only the mmap ioctls went the other direction.
2007-07-20Remove DRM_ERR OS macro.Eric Anholt
This was used to make all ioctl handlers return -errno on linux and errno on *BSD. Instead, just return -errno in shared code, and flip sign on return from shared code to *BSD code.
2007-07-19FreeBSD: Fix the recently added drawable add/remove/update code.Eric Anholt
2007-07-18Add dry-coded DRM drawable private information storage for FreeBSD.Eric Anholt
With this, all modules build again.
2007-07-11Made drm_sg_alloc accessible from inside the DRM - drm_sg_alloc_ioctl is the ↵Arthur Huillet
ioctl wrapper
2007-05-29Update a bunch of FreeBSD port code.Jung-uk Kim
Tested on r200/r300. i915 updates still remain to be done.
2006-09-06Put the PCI device/vendor id in the drm_device_t.Eric Anholt
This helps us unbreak FreeBSD DRM from the 965 changes.
2005-12-30Merge patch from jhb to catch up with FreeBSD-current vgapci master deviceEric Anholt
changes.
2005-12-02Finish the last bits necessary to get the i915 DRM port working on FreeBSDEric Anholt
Submitted by: Alexey Popov <llp@iteranet.com>
2005-12-02FreeBSD PR kern/85479: Restore the enabling of debugging by default by theEric Anholt
DRM_DEBUG kernel option. It remains controlled by hw.dri.*.debug no matter what.
2005-11-08Correct another LOR issue with resource allocation. This leaves theEric Anholt
drm_get_resource_* resource allocation a little racy, but they're getting called at either X Server startup or driver load, so it's serialized anyway.
2005-11-08Initial port of savage to FreeBSD for the AGP and !ShadowStatus case. AddsEric Anholt
drm_mtrr_{add,del} for handling the MTRR setup. Still has a LOR issue with DRM_VERIFYAREA_READ/DRM_COPY_FROM_USER_UNCHECKED in savage_bci.c -- this won't work with the fine-grained locking in use, and just doing a single copyin to a temporary will probably work fine. Also note that the module leaks approximately 4 kb on unload.
2005-11-08Correct a LOR related to the PCI resource allocations by simply moving theEric Anholt
uninit to unload time rather than lastclose.
2005-11-08Fix FreeBSD DRM for latest MGA changes to agp support, which cleans thingsEric Anholt
up a good bit, I think. Also, remove the agp_uninit() function which has lain around as a noop for years now. The FreeBSD DRM is now all compiling, with the exception of via. One known sleeping-with-lock-held issue remains.
2005-09-03convert ioctl flags to use flags instead of separate intsDave Airlie
2005-08-26Previously, drm_get_resource_start() and drm_get_resource_len() wouldEric Anholt
allocate the resource RF_ACTIVE, pull out the appropriate value, and return it. However, allocating large framebuffers RF_ACTIVE would run the system out of KVA, and this also left open the possibility of the resource getting moved after getting the offset. Instead, when either of these are called, allocate the resource if it isn't allocated already (non-RF_ACTIVE) and store it in the DRM device, to be cleaned up on lastclose.
2005-08-26[1] Fix BSD DRM for the nonroot changes. [2] Don't attempt to acquire theEric Anholt
DMA lock in a non-DMA driver, as it will be uninitialized. Submitted by: [1] jkim (minor changes by me)
2005-08-12Fix build after linux-side checkin of master/root-only split. Still onlyEric Anholt
cares about root on the BSD side, but should be secure.
2005-08-05Rename the driver hooks in the DRM to something a little moreEric Anholt
understandable: preinit -> load postinit -> (removed) presetup -> firstopen postsetup -> (removed) open_helper -> open prerelease -> preclose free_filp_priv -> postclose pretakedown -> lastclose postcleanup -> unload release -> reclaim_buffers_locked version -> (removed) postinit and version were replaced with generic code in the Linux DRM (drivers now set their version numbers and description in the driver structure, like on BSD). postsetup wasn't used at all. Fixes the savage hooks for initializing and tearing down mappings at the right times. Testing involved at least starting X, running glxgears, killing glxgears, exiting X, and repeating. Tested on: FreeBSD (g200, g400, r200, r128) Linux (r200, savage4)
2005-08-04Fix the MGA driver on BSD by passing in the proper chipset flags to theEric Anholt
driver's preinit routine, and by using DRM_COPY_TO_USER_IOCTL when copying out to an ioctl's data pointer. Pulled from the latest version of my drm-hook-rename.diff and only compile-tested after that.
2005-06-29Get the BSD DRM compiling again after MGA and mapping changes. Note thatEric Anholt
i915 has been disabled for the moment, rather than working around linux-specific code in the shared dir.
2005-06-14Adds support for PCI cards to MGA DRMIan Romanick
This patch adds serveral new ioctls and a new query to get_param query to support PCI MGA cards. Two ioctls were added to implement interrupt based waiting. With this change, the client-side driver no longer needs to map the primary DMA region or the MMIO region. Previously, end-of-frame waiting was done by busy waiting in the client-side driver until one of the MMIO registers (the current DMA pointer) matched a pointer to the end of primary DMA space. By using interrupts, the busy waiting and the extra mappings are removed. A third ioctl was added to bootstrap DMA. This ioctl, which is used by the X-server, moves a *LOT* of code from the X-server into the kernel. This allows the kernel to do whatever needs to be done to setup DMA buffers. The entire process and the locations of the buffers are hidden from user-mode. Additionally, a get_param query was added to differentiate between G4x0 cards and G550 cards. A gap was left in the numbering sequence so that, if needed, G450 cards could be distinguished from G400 cards. According to Ville Syrjälä, the G4x0 cards and the G550 cards handle anisotropic filtering differently. This seems the most compatible way to let the client-side driver know which card it's own. Doing this very small change now eliminates the need to bump the DRM minor version twice. http://marc.theaimsgroup.com/?l=dri-devel&m=106625815319773&w=2 A number of ioctl handlers in linux-core were also modified so that they could be called in-kernel. In these cases, the in-kernel callable version kept the existing name (e.g., drm_agp_acquire) and the ioctl handler added _ioctl to the name (e.g., drm_agp_acquire_ioctl). This patch also replaces the drm_agp_do_release function with drm_agp_release. drm_agp_release (drm_core_agp_release in the previous patch) is very similar to drm_agp_do_release, and I saw no reason to have both. This commit *breaks the build* on BSD. Eric said that he would make the required updates to the BSD side soon. Xorg bug: 3259 Reviewed by: Eric Anholt
2005-06-06Add a few more bits of Tonnerre's NetBSD port (Still need to deal with theEric Anholt
device attachment).
2005-04-16Use /*- to begin license blocks in BSD code to reduce diffs against FreeBSDEric Anholt
CVS.
2005-02-19Merge r1.26 from FreeBSD: Now that mem(4) is a kernel module, we need toEric Anholt
depend on it.
2005-02-14Use the proper API to get PCI vendor/device number for a dev.Eric Anholt
PR: ports/76879 Submitted by: Alex, lesha at intercaf dot ru.
2005-02-05- Implement drm_initmap, and extend it with the resource number to helpEric Anholt
FreeBSD. Add drm_get_resource_{start|len} so linux-specific stuff doesn't need to be in shared code. - Fix mach64 build by using __DECONST to work around passing a const pointer to useracc, which is unfortunately not marked const. - Get rid of a lot of maplist code by not having dev->maplist be a pointer, and by sticking the link entries directly in drm_local_map_t rather than having a separate structure for the linked list. - Factor out map uninit and removal into its own routine, rather than duplicating in both drm_takedown() and drm_rmmap(). - Hook up more driver functions, and correct FreeBSD-specific bits of radeon_cp.c, making radeon work. - Baby steps towards using bus_space as we should.
2004-11-07Refine the locking of the DRM. Most significant is covering the driverEric Anholt
ioctls with dev_lock, which is a major step toward being able to remove Giant. Covers some new pieces (dev->unique*) in the core, and avoids one call down into system internals with the drm lock held, which is usually bad (FreeBSD LOR #23, #27).
2004-11-07Now that the memory debug code is gone, and all 3 BSDs have M_ZERO, stopEric Anholt
using drm_alloc/drm_free in the core and instead use plain malloc/free.
2004-11-06Get r128 basically working: Hook up the driver's dma ioctl, use the properEric Anholt
offset into the driver ioctl array, and don't make the ctx bitmap conditional.
2004-11-06Move the lock/unlock ioctls to a more logical place, in drm_lock.c.Eric Anholt
2004-11-06Hook the debug output up to a sysctl, so you can choose to enable atEric Anholt
runtime.
2004-11-06Commit first pieces of port to OpenBSD, done by Martin Lexa (martin atEric Anholt
martinlexa dot cz). Now that we've got porting for all three major BSDs (and the fourth being very similar to FreeBSD), move the mostly-duplication drm_os_* files into drmP.h. Remove some cruft from linux heritage and from pieces of the DRM that have since been removed. Note that things are still not quite working for even FreeBSD, but these are first steps at cleanup, and just a WIP checkpoint.
2004-11-06Commit WIP of BSD conversion to core model. Compiles for r128, radeon, butEric Anholt
doesn't run yet. Moves the ioctl definitions for these two drivers back to the shared code -- they aren't OS-specific.
2004-08-17Merged drmfntbl-0-0-1Dave Airlie
2004-08-03bring over fix from i865-agp branch, it now probes the driver, X hangsDave Airlie
box..
2004-07-06MFC as of 20040705: dev_t -> struct cdev * change.Eric Anholt
2004-05-11Merge from FreeBSD-current. Mostly 64-bit cleanliness fixes, but a fewEric Anholt
driver interface changes from -current.
class="hl opt">= pgprot_writecombine(tmp); else tmp = pgprot_noncached(tmp); #elif defined(__sparc__) tmp = pgprot_noncached(tmp); #endif return tmp; } static pgprot_t drm_dma_prot(uint32_t map_type, struct vm_area_struct *vma) { pgprot_t tmp = vm_get_page_prot(vma->vm_flags); #if defined(__powerpc__) && defined(CONFIG_NOT_COHERENT_CACHE) tmp |= _PAGE_NO_CACHE; #endif return tmp; } #ifndef DRM_VM_NOPAGE /** * \c fault method for AGP virtual memory. * * \param vma virtual memory area. * \param address access address. * \return pointer to the page structure. * * Find the right map and if it's AGP memory find the real physical page to * map, get the page, increment the use count and return it. */ #if __OS_HAS_AGP static int drm_do_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) { struct drm_file *priv = vma->vm_file->private_data; struct drm_device *dev = priv->minor->dev; struct drm_map *map = NULL; struct drm_map_list *r_list; struct drm_hash_item *hash; /* * Find the right map */ if (!drm_core_has_AGP(dev)) goto vm_fault_error; if (!dev->agp || !dev->agp->cant_use_aperture) goto vm_fault_error; if (drm_ht_find_item(&dev->map_hash, vma->vm_pgoff, &hash)) goto vm_fault_error; r_list = drm_hash_entry(hash, struct drm_map_list, hash); map = r_list->map; if (map && map->type == _DRM_AGP) { /* * Using vm_pgoff as a selector forces us to use this unusual * addressing scheme. */ unsigned long offset = (unsigned long)vmf->virtual_address - vma->vm_start; unsigned long baddr = map->offset + offset; struct drm_agp_mem *agpmem; struct page *page; #ifdef __alpha__ /* * Adjust to a bus-relative address */ baddr -= dev->hose->mem_space->start; #endif /* * It's AGP memory - find the real physical page to map */ list_for_each_entry(agpmem, &dev->agp->memory, head) { if (agpmem->bound <= baddr && agpmem->bound + agpmem->pages * PAGE_SIZE > baddr) break; } if (!agpmem) goto vm_fault_error; /* * Get the page, inc the use count, and return it */ offset = (baddr - agpmem->bound) >> PAGE_SHIFT; page = virt_to_page(__va(agpmem->memory->memory[offset])); get_page(page); vmf->page = page; DRM_DEBUG ("baddr = 0x%lx page = 0x%p, offset = 0x%lx, count=%d\n", baddr, __va(agpmem->memory->memory[offset]), offset, page_count(page)); return 0; } vm_fault_error: return VM_FAULT_SIGBUS; /* Disallow mremap */ } #else /* __OS_HAS_AGP */ static int drm_do_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) { return VM_FAULT_SIGBUS; } #endif /* __OS_HAS_AGP */ /** * \c nopage method for shared virtual memory. * * \param vma virtual memory area. * \param address access address. * \return pointer to the page structure. * * Get the mapping, find the real physical page to map, get the page, and * return it. */ static int drm_do_vm_shm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) { struct drm_map *map = (struct drm_map *) vma->vm_private_data; unsigned long offset; unsigned long i; struct page *page; if (!map) return VM_FAULT_SIGBUS; /* Nothing allocated */ offset = (unsigned long)vmf->virtual_address - vma->vm_start; i = (unsigned long)map->handle + offset; page = vmalloc_to_page((void *)i); if (!page) return VM_FAULT_SIGBUS; get_page(page); vmf->page = page; DRM_DEBUG("shm_fault 0x%lx\n", offset); return 0; } #endif /** * \c close method for shared virtual memory. * * \param vma virtual memory area. * * Deletes map information if we are the last * person to close a mapping and it's not in the global maplist. */ static void drm_vm_shm_close(struct vm_area_struct *vma) { struct drm_file *priv = vma->vm_file->private_data; struct drm_device *dev = priv->minor->dev; struct drm_vma_entry *pt, *temp; struct drm_map *map; struct drm_map_list *r_list; int found_maps = 0; DRM_DEBUG("0x%08lx,0x%08lx\n", vma->vm_start, vma->vm_end - vma->vm_start); atomic_dec(&dev->vma_count); map = vma->vm_private_data; mutex_lock(&dev->struct_mutex); list_for_each_entry_safe(pt, temp, &dev->vmalist, head) { if (pt->vma->vm_private_data == map) found_maps++; if (pt->vma == vma) { list_del(&pt->head); drm_ctl_free(pt, sizeof(*pt), DRM_MEM_VMAS); } } /* We were the only map that was found */ if (found_maps == 1 && map->flags & _DRM_REMOVABLE) { /* Check to see if we are in the maplist, if we are not, then * we delete this mappings information. */ found_maps = 0; list_for_each_entry(r_list, &dev->maplist, head) { if (r_list->map == map) found_maps++; } if (!found_maps) { drm_dma_handle_t dmah; switch (map->type) { case _DRM_REGISTERS: case _DRM_FRAME_BUFFER: if (drm_core_has_MTRR(dev) && map->mtrr >= 0) { int retcode; retcode = mtrr_del(map->mtrr, map->offset, map->size); DRM_DEBUG("mtrr_del = %d\n", retcode); } iounmap(map->handle); break; case _DRM_SHM: vfree(map->handle); break; case _DRM_AGP: case _DRM_SCATTER_GATHER: break; case _DRM_CONSISTENT: dmah.vaddr = map->handle; dmah.busaddr = map->offset; dmah.size = map->size; __drm_pci_free(dev, &dmah); break; case _DRM_TTM: BUG_ON(1); break; } drm_free(map, sizeof(*map), DRM_MEM_MAPS); } } mutex_unlock(&dev->struct_mutex); } #ifndef DRM_VM_NOPAGE /** * \c fault method for DMA virtual memory. * * \param vma virtual memory area. * \param address access address. * \return pointer to the page structure. * * Determine the page number from the page offset and get it from drm_device_dma::pagelist. */ static int drm_do_vm_dma_fault(struct vm_area_struct *vma, struct vm_fault *vmf) { struct drm_file *priv = vma->vm_file->private_data; struct drm_device *dev = priv->minor->dev; struct drm_device_dma *dma = dev->dma; unsigned long offset; unsigned long page_nr; struct page *page; if (!dma) return VM_FAULT_SIGBUS; /* Error */ if (!dma->pagelist) return VM_FAULT_SIGBUS; /* Nothing allocated */ offset = (unsigned long)vmf->virtual_address - vma->vm_start; /* vm_[pg]off[set] should be 0 */ page_nr = offset >> PAGE_SHIFT; /* page_nr could just be vmf->pgoff */ page = virt_to_page((dma->pagelist[page_nr] + (offset & (~PAGE_MASK)))); get_page(page); vmf->page = page; DRM_DEBUG("dma_fault 0x%lx (page %lu)\n", offset, page_nr); return 0; } /** * \c fault method for scatter-gather virtual memory. * * \param vma virtual memory area. * \param address access address. * \return pointer to the page structure. * * Determine the map offset from the page offset and get it from drm_sg_mem::pagelist. */ static int drm_do_vm_sg_fault(struct vm_area_struct *vma, struct vm_fault *vmf) { struct drm_map *map = (struct drm_map *) vma->vm_private_data; struct drm_file *priv = vma->vm_file->private_data; struct drm_device *dev = priv->minor->dev; struct drm_sg_mem *entry = dev->sg; unsigned long offset; unsigned long map_offset; unsigned long page_offset; struct page *page; if (!entry) return VM_FAULT_SIGBUS; /* Error */ if (!entry->pagelist) return VM_FAULT_SIGBUS; /* Nothing allocated */ offset = (unsigned long)vmf->virtual_address - vma->vm_start; map_offset = map->offset - (unsigned long)dev->sg->virtual; page_offset = (offset >> PAGE_SHIFT) + (map_offset >> PAGE_SHIFT); page = entry->pagelist[page_offset]; get_page(page); vmf->page = page; return 0; } #endif /** AGP virtual memory operations */ static struct vm_operations_struct drm_vm_ops = { #ifdef DRM_VM_NOPAGE .nopage = drm_vm_nopage, #else .fault = drm_do_vm_fault, #endif .open = drm_vm_open, .close = drm_vm_close, }; /** Shared virtual memory operations */ static struct vm_operations_struct drm_vm_shm_ops = { #ifdef DRM_VM_NOPAGE .nopage = drm_vm_shm_nopage, #else .fault = drm_do_vm_shm_fault, #endif .open = drm_vm_open, .close = drm_vm_shm_close, }; /** DMA virtual memory operations */ static struct vm_operations_struct drm_vm_dma_ops = { #ifdef DRM_VM_NOPAGE .nopage = drm_vm_dma_nopage, #else .fault = drm_do_vm_dma_fault, #endif .open = drm_vm_open, .close = drm_vm_close, }; /** Scatter-gather virtual memory operations */ static struct vm_operations_struct drm_vm_sg_ops = { #ifdef DRM_VM_NOPAGE .nopage = drm_vm_sg_nopage, #else .fault = drm_do_vm_sg_fault, #endif .open = drm_vm_open, .close = drm_vm_close, }; /** * \c open method for shared virtual memory. * * \param vma virtual memory area. * * Create a new drm_vma_entry structure as the \p vma private data entry and * add it to drm_device::vmalist. */ static void drm_vm_open_locked(struct vm_area_struct *vma) { struct drm_file *priv = vma->vm_file->private_data; struct drm_device *dev = priv->minor->dev; struct drm_vma_entry *vma_entry; DRM_DEBUG("0x%08lx,0x%08lx\n", vma->vm_start, vma->vm_end - vma->vm_start); atomic_inc(&dev->vma_count); vma_entry = drm_ctl_alloc(sizeof(*vma_entry), DRM_MEM_VMAS); if (vma_entry) { vma_entry->vma = vma; vma_entry->pid = current->pid; list_add(&vma_entry->head, &dev->vmalist); } } static void drm_vm_open(struct vm_area_struct *vma) { struct drm_file *priv = vma->vm_file->private_data; struct drm_device *dev = priv->minor->dev; mutex_lock(&dev->struct_mutex); drm_vm_open_locked(vma); mutex_unlock(&dev->struct_mutex); } /** * \c close method for all virtual memory types. * * \param vma virtual memory area. * * Search the \p vma private data entry in drm_device::vmalist, unlink it, and * free it. */ static void drm_vm_close(struct vm_area_struct *vma) { struct drm_file *priv = vma->vm_file->private_data; struct drm_device *dev = priv->minor->dev; struct drm_vma_entry *pt, *temp; DRM_DEBUG("0x%08lx,0x%08lx\n", vma->vm_start, vma->vm_end - vma->vm_start); atomic_dec(&dev->vma_count); mutex_lock(&dev->struct_mutex); list_for_each_entry_safe(pt, temp, &dev->vmalist, head) { if (pt->vma == vma) { list_del(&pt->head); drm_ctl_free(pt, sizeof(*pt), DRM_MEM_VMAS); break; } } mutex_unlock(&dev->struct_mutex); } /** * mmap DMA memory. * * \param file_priv DRM file private. * \param vma virtual memory area. * \return zero on success or a negative number on failure. * * Sets the virtual memory area operations structure to vm_dma_ops, the file * pointer, and calls vm_open(). */ static int drm_mmap_dma(struct file *filp, struct vm_area_struct *vma) { struct drm_file *priv = filp->private_data; struct drm_device *dev; struct drm_device_dma *dma; unsigned long length = vma->vm_end - vma->vm_start; dev = priv->minor->dev; dma = dev->dma; DRM_DEBUG("start = 0x%lx, end = 0x%lx, page offset = 0x%lx\n", vma->vm_start, vma->vm_end, vma->vm_pgoff); /* Length must match exact page count */ if (!dma || (length >> PAGE_SHIFT) != dma->page_count) { return -EINVAL; } if (!capable(CAP_SYS_ADMIN) && (dma->flags & _DRM_DMA_USE_PCI_RO)) { vma->vm_flags &= ~(VM_WRITE | VM_MAYWRITE); #if defined(__i386__) || defined(__x86_64__) pgprot_val(vma->vm_page_prot) &= ~_PAGE_RW; #else /* Ye gads this is ugly. With more thought we could move this up higher and use `protection_map' instead. */ vma->vm_page_prot = __pgprot(pte_val (pte_wrprotect (__pte(pgprot_val(vma->vm_page_prot))))); #endif } vma->vm_ops = &drm_vm_dma_ops; vma->vm_flags |= VM_RESERVED; /* Don't swap */ vma->vm_file = filp; /* Needed for drm_vm_open() */ drm_vm_open_locked(vma); return 0; } unsigned long drm_core_get_map_ofs(struct drm_map * map) { return map->offset; } EXPORT_SYMBOL(drm_core_get_map_ofs); unsigned long drm_core_get_reg_ofs(struct drm_device *dev) { #ifdef __alpha__ return dev->hose->dense_mem_base - dev->hose->mem_space->start; #else return 0; #endif } EXPORT_SYMBOL(drm_core_get_reg_ofs); /** * mmap DMA memory. * * \param file_priv DRM file private. * \param vma virtual memory area. * \return zero on success or a negative number on failure. * * If the virtual memory area has no offset associated with it then it's a DMA * area, so calls mmap_dma(). Otherwise searches the map in drm_device::maplist, * checks that the restricted flag is not set, sets the virtual memory operations * according to the mapping type and remaps the pages. Finally sets the file * pointer and calls vm_open(). */ static int drm_mmap_locked(struct file *filp, struct vm_area_struct *vma) { struct drm_file *priv = filp->private_data; struct drm_device *dev = priv->minor->dev; struct drm_map *map = NULL; unsigned long offset = 0; struct drm_hash_item *hash; DRM_DEBUG("start = 0x%lx, end = 0x%lx, page offset = 0x%lx\n", vma->vm_start, vma->vm_end, vma->vm_pgoff); if (!priv->authenticated) return -EACCES; /* We check for "dma". On Apple's UniNorth, it's valid to have