diff options
Diffstat (limited to 'drivers/staging/gma500/gem.c')
| -rw-r--r-- | drivers/staging/gma500/gem.c | 292 |
1 files changed, 0 insertions, 292 deletions
diff --git a/drivers/staging/gma500/gem.c b/drivers/staging/gma500/gem.c deleted file mode 100644 index f6433c037d2..00000000000 --- a/drivers/staging/gma500/gem.c +++ /dev/null @@ -1,292 +0,0 @@ -/* - * psb GEM interface - * - * Copyright (c) 2011, Intel Corporation. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms and conditions of the GNU General Public License, - * version 2, as published by the Free Software Foundation. - * - * This program is distributed in the hope it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License along with - * this program; if not, write to the Free Software Foundation, Inc., - * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. - * - * Authors: Alan Cox - * - * TODO: - * - we need to work out if the MMU is relevant (eg for - * accelerated operations on a GEM object) - */ - -#include <drm/drmP.h> -#include <drm/drm.h> -#include "psb_drm.h" -#include "psb_drv.h" - -int psb_gem_init_object(struct drm_gem_object *obj) -{ - return -EINVAL; -} - -void psb_gem_free_object(struct drm_gem_object *obj) -{ - struct gtt_range *gtt = container_of(obj, struct gtt_range, gem); - drm_gem_object_release_wrap(obj); - /* This must occur last as it frees up the memory of the GEM object */ - psb_gtt_free_range(obj->dev, gtt); -} - -int psb_gem_get_aperture(struct drm_device *dev, void *data, - struct drm_file *file) -{ - return -EINVAL; -} - -/** - * psb_gem_dumb_map_gtt - buffer mapping for dumb interface - * @file: our drm client file - * @dev: drm device - * @handle: GEM handle to the object (from dumb_create) - * - * Do the necessary setup to allow the mapping of the frame buffer - * into user memory. We don't have to do much here at the moment. - */ -int psb_gem_dumb_map_gtt(struct drm_file *file, struct drm_device *dev, - uint32_t handle, uint64_t *offset) -{ - int ret = 0; - struct drm_gem_object *obj; - - if (!(dev->driver->driver_features & DRIVER_GEM)) - return -ENODEV; - - mutex_lock(&dev->struct_mutex); - - /* GEM does all our handle to object mapping */ - obj = drm_gem_object_lookup(dev, file, handle); - if (obj == NULL) { - ret = -ENOENT; - goto unlock; - } - /* What validation is needed here ? */ - - /* Make it mmapable */ - if (!obj->map_list.map) { - ret = gem_create_mmap_offset(obj); - if (ret) - goto out; - } - /* GEM should really work out the hash offsets for us */ - *offset = (u64)obj->map_list.hash.key << PAGE_SHIFT; -out: - drm_gem_object_unreference(obj); -unlock: - mutex_unlock(&dev->struct_mutex); - return ret; -} - -/** - * psb_gem_create - create a mappable object - * @file: the DRM file of the client - * @dev: our device - * @size: the size requested - * @handlep: returned handle (opaque number) - * - * Create a GEM object, fill in the boilerplate and attach a handle to - * it so that userspace can speak about it. This does the core work - * for the various methods that do/will create GEM objects for things - */ -static int psb_gem_create(struct drm_file *file, - struct drm_device *dev, uint64_t size, uint32_t *handlep) -{ - struct gtt_range *r; - int ret; - u32 handle; - - size = roundup(size, PAGE_SIZE); - - /* Allocate our object - for now a direct gtt range which is not - stolen memory backed */ - r = psb_gtt_alloc_range(dev, size, "gem", 0); - if (r == NULL) { - dev_err(dev->dev, "no memory for %lld byte GEM object\n", size); - return -ENOSPC; - } - /* Initialize the extra goodies GEM needs to do all the hard work */ - if (drm_gem_object_init(dev, &r->gem, size) != 0) { - psb_gtt_free_range(dev, r); - /* GEM doesn't give an error code so use -ENOMEM */ - dev_err(dev->dev, "GEM init failed for %lld\n", size); - return -ENOMEM; - } - /* Give the object a handle so we can carry it more easily */ - ret = drm_gem_handle_create(file, &r->gem, &handle); - if (ret) { - dev_err(dev->dev, "GEM handle failed for %p, %lld\n", - &r->gem, size); - drm_gem_object_release(&r->gem); - psb_gtt_free_range(dev, r); - return ret; - } - /* We have the initial and handle reference but need only one now */ - drm_gem_object_unreference(&r->gem); - *handlep = handle; - return 0; -} - -/** - * psb_gem_dumb_create - create a dumb buffer - * @drm_file: our client file - * @dev: our device - * @args: the requested arguments copied from userspace - * - * Allocate a buffer suitable for use for a frame buffer of the - * form described by user space. Give userspace a handle by which - * to reference it. - */ -int psb_gem_dumb_create(struct drm_file *file, struct drm_device *dev, - struct drm_mode_create_dumb *args) -{ - args->pitch = ALIGN(args->width * ((args->bpp + 7) / 8), 64); - args->size = args->pitch * args->height; - return psb_gem_create(file, dev, args->size, &args->handle); -} - -/** - * psb_gem_dumb_destroy - destroy a dumb buffer - * @file: client file - * @dev: our DRM device - * @handle: the object handle - * - * Destroy a handle that was created via psb_gem_dumb_create, at least - * we hope it was created that way. i915 seems to assume the caller - * does the checking but that might be worth review ! FIXME - */ -int psb_gem_dumb_destroy(struct drm_file *file, struct drm_device *dev, - uint32_t handle) -{ - /* No special work needed, drop the reference and see what falls out */ - return drm_gem_handle_delete(file, handle); -} - -/** - * psb_gem_fault - pagefault handler for GEM objects - * @vma: the VMA of the GEM object - * @vmf: fault detail - * - * Invoked when a fault occurs on an mmap of a GEM managed area. GEM - * does most of the work for us including the actual map/unmap calls - * but we need to do the actual page work. - * - * This code eventually needs to handle faulting objects in and out - * of the GTT and repacking it when we run out of space. We can put - * that off for now and for our simple uses - * - * The VMA was set up by GEM. In doing so it also ensured that the - * vma->vm_private_data points to the GEM object that is backing this - * mapping. - */ -int psb_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf) -{ - struct drm_gem_object *obj; - struct gtt_range *r; - int ret; - unsigned long pfn; - pgoff_t page_offset; - struct drm_device *dev; - struct drm_psb_private *dev_priv; - - obj = vma->vm_private_data; /* GEM object */ - dev = obj->dev; - dev_priv = dev->dev_private; - - r = container_of(obj, struct gtt_range, gem); /* Get the gtt range */ - - /* Make sure we don't parallel update on a fault, nor move or remove - something from beneath our feet */ - mutex_lock(&dev->struct_mutex); - - /* For now the mmap pins the object and it stays pinned. As things - stand that will do us no harm */ - if (r->mmapping == 0) { - ret = psb_gtt_pin(r); - if (ret < 0) { - dev_err(dev->dev, "gma500: pin failed: %d\n", ret); - goto fail; - } - r->mmapping = 1; - } - - /* Page relative to the VMA start - we must calculate this ourselves - because vmf->pgoff is the fake GEM offset */ - page_offset = ((unsigned long) vmf->virtual_address - vma->vm_start) - >> PAGE_SHIFT; - - /* CPU view of the page, don't go via the GART for CPU writes */ - if (r->stolen) - pfn = (dev_priv->stolen_base + r->offset) >> PAGE_SHIFT; - else - pfn = page_to_pfn(r->pages[page_offset]); - ret = vm_insert_pfn(vma, (unsigned long)vmf->virtual_address, pfn); - -fail: - mutex_unlock(&dev->struct_mutex); - switch (ret) { - case 0: - case -ERESTARTSYS: - case -EINTR: - return VM_FAULT_NOPAGE; - case -ENOMEM: - return VM_FAULT_OOM; - default: - return VM_FAULT_SIGBUS; - } -} - -static int psb_gem_create_stolen(struct drm_file *file, struct drm_device *dev, - int size, u32 *handle) -{ - struct gtt_range *gtt = psb_gtt_alloc_range(dev, size, "gem", 1); - if (gtt == NULL) - return -ENOMEM; - if (drm_gem_private_object_init(dev, >t->gem, size) != 0) - goto free_gtt; - if (drm_gem_handle_create(file, >t->gem, handle) == 0) - return 0; -free_gtt: - psb_gtt_free_range(dev, gtt); - return -ENOMEM; -} - -/* - * GEM interfaces for our specific client - */ -int psb_gem_create_ioctl(struct drm_device *dev, void *data, - struct drm_file *file) -{ - struct drm_psb_gem_create *args = data; - int ret; - if (args->flags & PSB_GEM_CREATE_STOLEN) { - ret = psb_gem_create_stolen(file, dev, args->size, - &args->handle); - if (ret == 0) - return 0; - /* Fall throguh */ - args->flags &= ~PSB_GEM_CREATE_STOLEN; - } - return psb_gem_create(file, dev, args->size, &args->handle); -} - -int psb_gem_mmap_ioctl(struct drm_device *dev, void *data, - struct drm_file *file) -{ - struct drm_psb_gem_mmap *args = data; - return dev->driver->dumb_map_offset(file, dev, - args->handle, &args->offset); -} - |