S: Supported
F: drivers/gpu/drm/vmwgfx/
F: include/uapi/drm/vmwgfx_drm.h
-F: mm/as_dirty_helpers.c
DRM DRIVERS
M: David Airlie <airlied@linux.ie>
mutex_lock(&ttm_global_mutex);
list_add_tail(&bdev->device_list, &glob->device_list);
mutex_unlock(&ttm_global_mutex);
- bdev->vm_ops = &ttm_bo_vm_ops;
return 0;
out_no_sys:
#include <linux/uaccess.h>
#include <linux/mem_encrypt.h>
+#define TTM_BO_VM_NUM_PREFAULT 16
+
static vm_fault_t ttm_bo_vm_fault_idle(struct ttm_buffer_object *bo,
struct vm_fault *vmf)
{
+ page_offset;
}
-/**
- * ttm_bo_vm_reserve - Reserve a buffer object in a retryable vm callback
- * @bo: The buffer object
- * @vmf: The fault structure handed to the callback
- *
- * vm callbacks like fault() and *_mkwrite() allow for the mm_sem to be dropped
- * during long waits, and after the wait the callback will be restarted. This
- * is to allow other threads using the same virtual memory space concurrent
- * access to map(), unmap() completely unrelated buffer objects. TTM buffer
- * object reservations sometimes wait for GPU and should therefore be
- * considered long waits. This function reserves the buffer object interruptibly
- * taking this into account. Starvation is avoided by the vm system not
- * allowing too many repeated restarts.
- * This function is intended to be used in customized fault() and _mkwrite()
- * handlers.
- *
- * Return:
- * 0 on success and the bo was reserved.
- * VM_FAULT_RETRY if blocking wait.
- * VM_FAULT_NOPAGE if blocking wait and retrying was not allowed.
- */
-vm_fault_t ttm_bo_vm_reserve(struct ttm_buffer_object *bo,
- struct vm_fault *vmf)
+static vm_fault_t ttm_bo_vm_fault(struct vm_fault *vmf)
{
+ struct vm_area_struct *vma = vmf->vma;
+ struct ttm_buffer_object *bo = (struct ttm_buffer_object *)
+ vma->vm_private_data;
+ struct ttm_bo_device *bdev = bo->bdev;
+ unsigned long page_offset;
+ unsigned long page_last;
+ unsigned long pfn;
+ struct ttm_tt *ttm = NULL;
+ struct page *page;
+ int err;
+ int i;
+ vm_fault_t ret = VM_FAULT_NOPAGE;
+ unsigned long address = vmf->address;
+ struct ttm_mem_type_manager *man =
+ &bdev->man[bo->mem.mem_type];
+ struct vm_area_struct cvma;
+
/*
* Work around locking order reversal in fault / nopfn
* between mmap_sem and bo_reserve: Perform a trylock operation
return VM_FAULT_NOPAGE;
}
- return 0;
-}
-EXPORT_SYMBOL(ttm_bo_vm_reserve);
-
-/**
- * ttm_bo_vm_fault_reserved - TTM fault helper
- * @vmf: The struct vm_fault given as argument to the fault callback
- * @prot: The page protection to be used for this memory area.
- * @num_prefault: Maximum number of prefault pages. The caller may want to
- * specify this based on madvice settings and the size of the GPU object
- * backed by the memory.
- *
- * This function inserts one or more page table entries pointing to the
- * memory backing the buffer object, and then returns a return code
- * instructing the caller to retry the page access.
- *
- * Return:
- * VM_FAULT_NOPAGE on success or pending signal
- * VM_FAULT_SIGBUS on unspecified error
- * VM_FAULT_OOM on out-of-memory
- * VM_FAULT_RETRY if retryable wait
- */
-vm_fault_t ttm_bo_vm_fault_reserved(struct vm_fault *vmf,
- pgprot_t prot,
- pgoff_t num_prefault)
-{
- struct vm_area_struct *vma = vmf->vma;
- struct vm_area_struct cvma = *vma;
- struct ttm_buffer_object *bo = (struct ttm_buffer_object *)
- vma->vm_private_data;
- struct ttm_bo_device *bdev = bo->bdev;
- unsigned long page_offset;
- unsigned long page_last;
- unsigned long pfn;
- struct ttm_tt *ttm = NULL;
- struct page *page;
- int err;
- pgoff_t i;
- vm_fault_t ret = VM_FAULT_NOPAGE;
- unsigned long address = vmf->address;
- struct ttm_mem_type_manager *man =
- &bdev->man[bo->mem.mem_type];
-
/*
* Refuse to fault imported pages. This should be handled
* (if at all) by redirecting mmap to the exporter.
*/
- if (bo->ttm && (bo->ttm->page_flags & TTM_PAGE_FLAG_SG))
- return VM_FAULT_SIGBUS;
+ if (bo->ttm && (bo->ttm->page_flags & TTM_PAGE_FLAG_SG)) {
+ ret = VM_FAULT_SIGBUS;
+ goto out_unlock;
+ }
if (bdev->driver->fault_reserve_notify) {
struct dma_fence *moving = dma_fence_get(bo->moving);
break;
case -EBUSY:
case -ERESTARTSYS:
- return VM_FAULT_NOPAGE;
+ ret = VM_FAULT_NOPAGE;
+ goto out_unlock;
default:
- return VM_FAULT_SIGBUS;
+ ret = VM_FAULT_SIGBUS;
+ goto out_unlock;
}
if (bo->moving != moving) {
* move.
*/
ret = ttm_bo_vm_fault_idle(bo, vmf);
- if (unlikely(ret != 0))
- return ret;
+ if (unlikely(ret != 0)) {
+ if (ret == VM_FAULT_RETRY &&
+ !(vmf->flags & FAULT_FLAG_RETRY_NOWAIT)) {
+ /* The BO has already been unreserved. */
+ return ret;
+ }
+
+ goto out_unlock;
+ }
err = ttm_mem_io_lock(man, true);
- if (unlikely(err != 0))
- return VM_FAULT_NOPAGE;
+ if (unlikely(err != 0)) {
+ ret = VM_FAULT_NOPAGE;
+ goto out_unlock;
+ }
err = ttm_mem_io_reserve_vm(bo);
if (unlikely(err != 0)) {
ret = VM_FAULT_SIGBUS;
goto out_io_unlock;
}
- cvma.vm_page_prot = ttm_io_prot(bo->mem.placement, prot);
- if (!bo->mem.bus.is_iomem) {
+ /*
+ * Make a local vma copy to modify the page_prot member
+ * and vm_flags if necessary. The vma parameter is protected
+ * by mmap_sem in write mode.
+ */
+ cvma = *vma;
+ cvma.vm_page_prot = vm_get_page_prot(cvma.vm_flags);
+
+ if (bo->mem.bus.is_iomem) {
+ cvma.vm_page_prot = ttm_io_prot(bo->mem.placement,
+ cvma.vm_page_prot);
+ } else {
struct ttm_operation_ctx ctx = {
.interruptible = false,
.no_wait_gpu = false,
};
ttm = bo->ttm;
- if (ttm_tt_populate(bo->ttm, &ctx)) {
+ cvma.vm_page_prot = ttm_io_prot(bo->mem.placement,
+ cvma.vm_page_prot);
+
+ /* Allocate all page at once, most common usage */
+ if (ttm_tt_populate(ttm, &ctx)) {
ret = VM_FAULT_OOM;
goto out_io_unlock;
}
- } else {
- /* Iomem should not be marked encrypted */
- cvma.vm_page_prot = pgprot_decrypted(cvma.vm_page_prot);
}
/*
* Speculatively prefault a number of pages. Only error on
* first page.
*/
- for (i = 0; i < num_prefault; ++i) {
+ for (i = 0; i < TTM_BO_VM_NUM_PREFAULT; ++i) {
if (bo->mem.bus.is_iomem) {
+ /* Iomem should not be marked encrypted */
+ cvma.vm_page_prot = pgprot_decrypted(cvma.vm_page_prot);
pfn = ttm_bo_io_mem_pfn(bo, page_offset);
} else {
page = ttm->pages[page_offset];
ret = VM_FAULT_NOPAGE;
out_io_unlock:
ttm_mem_io_unlock(man);
- return ret;
-}
-EXPORT_SYMBOL(ttm_bo_vm_fault_reserved);
-
-static vm_fault_t ttm_bo_vm_fault(struct vm_fault *vmf)
-{
- struct vm_area_struct *vma = vmf->vma;
- pgprot_t prot;
- struct ttm_buffer_object *bo = vma->vm_private_data;
- vm_fault_t ret;
-
- ret = ttm_bo_vm_reserve(bo, vmf);
- if (ret)
- return ret;
-
- prot = vm_get_page_prot(vma->vm_flags);
- ret = ttm_bo_vm_fault_reserved(vmf, prot, TTM_BO_VM_NUM_PREFAULT);
- if (ret == VM_FAULT_RETRY && !(vmf->flags & FAULT_FLAG_RETRY_NOWAIT))
- return ret;
-
+out_unlock:
reservation_object_unlock(bo->resv);
return ret;
}
return ret;
}
-const struct vm_operations_struct ttm_bo_vm_ops = {
+static const struct vm_operations_struct ttm_bo_vm_ops = {
.fault = ttm_bo_vm_fault,
.open = ttm_bo_vm_open,
.close = ttm_bo_vm_close,
if (unlikely(ret != 0))
goto out_unref;
- vma->vm_ops = bdev->vm_ops;
+ vma->vm_ops = &ttm_bo_vm_ops;
/*
* Note: We're transferring the bo reference to
ttm_bo_get(bo);
- vma->vm_ops = bo->bdev->vm_ops;
+ vma->vm_ops = &ttm_bo_vm_ops;
vma->vm_private_data = bo;
vma->vm_flags |= VM_MIXEDMAP;
vma->vm_flags |= VM_IO | VM_DONTEXPAND;
select FB_CFB_IMAGEBLIT
select DRM_TTM
select FB
- select AS_DIRTY_HELPERS
# Only needed for the transitional use of drm_crtc_init - can be removed
# again once vmwgfx sets up the primary plane itself.
select DRM_KMS_HELPER
vmwgfx_cmdbuf_res.o vmwgfx_cmdbuf.o vmwgfx_stdu.o \
vmwgfx_cotable.o vmwgfx_so.o vmwgfx_binding.o vmwgfx_msg.o \
vmwgfx_simple_resource.o vmwgfx_va.o vmwgfx_blit.o \
- vmwgfx_validation.o vmwgfx_page_dirty.o \
+ vmwgfx_validation.o \
ttm_object.o ttm_lock.o
obj-$(CONFIG_DRM_VMWGFX) := vmwgfx.o
return offset;
}
+
static inline u32
svga3dsurface_get_image_offset(SVGA3dSurfaceFormat format,
surf_size_struct baseLevelSize,
return svga3dsurface_is_dx_screen_target_format(format);
}
-/**
- * struct svga3dsurface_mip - Mimpmap level information
- * @bytes: Bytes required in the backing store of this mipmap level.
- * @img_stride: Byte stride per image.
- * @row_stride: Byte stride per block row.
- * @size: The size of the mipmap.
- */
-struct svga3dsurface_mip {
- size_t bytes;
- size_t img_stride;
- size_t row_stride;
- struct drm_vmw_size size;
-
-};
-
-/**
- * struct svga3dsurface_cache - Cached surface information
- * @desc: Pointer to the surface descriptor
- * @mip: Array of mipmap level information. Valid size is @num_mip_levels.
- * @mip_chain_bytes: Bytes required in the backing store for the whole chain
- * of mip levels.
- * @sheet_bytes: Bytes required in the backing store for a sheet
- * representing a single sample.
- * @num_mip_levels: Valid size of the @mip array. Number of mipmap levels in
- * a chain.
- * @num_layers: Number of slices in an array texture or number of faces in
- * a cubemap texture.
- */
-struct svga3dsurface_cache {
- const struct svga3d_surface_desc *desc;
- struct svga3dsurface_mip mip[DRM_VMW_MAX_MIP_LEVELS];
- size_t mip_chain_bytes;
- size_t sheet_bytes;
- u32 num_mip_levels;
- u32 num_layers;
-};
-
-/**
- * struct svga3dsurface_loc - Surface location
- * @sub_resource: Surface subresource. Defined as layer * num_mip_levels +
- * mip_level.
- * @x: X coordinate.
- * @y: Y coordinate.
- * @z: Z coordinate.
- */
-struct svga3dsurface_loc {
- u32 sub_resource;
- u32 x, y, z;
-};
-
-/**
- * svga3dsurface_subres - Compute the subresource from layer and mipmap.
- * @cache: Surface layout data.
- * @mip_level: The mipmap level.
- * @layer: The surface layer (face or array slice).
- *
- * Return: The subresource.
- */
-static inline u32 svga3dsurface_subres(const struct svga3dsurface_cache *cache,
- u32 mip_level, u32 layer)
-{
- return cache->num_mip_levels * layer + mip_level;
-}
-
-/**
- * svga3dsurface_setup_cache - Build a surface cache entry
- * @size: The surface base level dimensions.
- * @format: The surface format.
- * @num_mip_levels: Number of mipmap levels.
- * @num_layers: Number of layers.
- * @cache: Pointer to a struct svga3dsurface_cach object to be filled in.
- *
- * Return: Zero on success, -EINVAL on invalid surface layout.
- */
-static inline int svga3dsurface_setup_cache(const struct drm_vmw_size *size,
- SVGA3dSurfaceFormat format,
- u32 num_mip_levels,
- u32 num_layers,
- u32 num_samples,
- struct svga3dsurface_cache *cache)
-{
- const struct svga3d_surface_desc *desc;
- u32 i;
-
- memset(cache, 0, sizeof(*cache));
- cache->desc = desc = svga3dsurface_get_desc(format);
- cache->num_mip_levels = num_mip_levels;
- cache->num_layers = num_layers;
- for (i = 0; i < cache->num_mip_levels; i++) {
- struct svga3dsurface_mip *mip = &cache->mip[i];
-
- mip->size = svga3dsurface_get_mip_size(*size, i);
- mip->bytes = svga3dsurface_get_image_buffer_size
- (desc, &mip->size, 0);
- mip->row_stride =
- __KERNEL_DIV_ROUND_UP(mip->size.width,
- desc->block_size.width) *
- desc->bytes_per_block * num_samples;
- if (!mip->row_stride)
- goto invalid_dim;
-
- mip->img_stride =
- __KERNEL_DIV_ROUND_UP(mip->size.height,
- desc->block_size.height) *
- mip->row_stride;
- if (!mip->img_stride)
- goto invalid_dim;
-
- cache->mip_chain_bytes += mip->bytes;
- }
- cache->sheet_bytes = cache->mip_chain_bytes * num_layers;
- if (!cache->sheet_bytes)
- goto invalid_dim;
-
- return 0;
-
-invalid_dim:
- VMW_DEBUG_USER("Invalid surface layout for dirty tracking.\n");
- return -EINVAL;
-}
-
-/**
- * svga3dsurface_get_loc - Get a surface location from an offset into the
- * backing store
- * @cache: Surface layout data.
- * @loc: Pointer to a struct svga3dsurface_loc to be filled in.
- * @offset: Offset into the surface backing store.
- */
-static inline void
-svga3dsurface_get_loc(const struct svga3dsurface_cache *cache,
- struct svga3dsurface_loc *loc,
- size_t offset)
-{
- const struct svga3dsurface_mip *mip = &cache->mip[0];
- const struct svga3d_surface_desc *desc = cache->desc;
- u32 layer;
- int i;
-
- if (offset >= cache->sheet_bytes)
- offset %= cache->sheet_bytes;
-
- layer = offset / cache->mip_chain_bytes;
- offset -= layer * cache->mip_chain_bytes;
- for (i = 0; i < cache->num_mip_levels; ++i, ++mip) {
- if (mip->bytes > offset)
- break;
- offset -= mip->bytes;
- }
-
- loc->sub_resource = svga3dsurface_subres(cache, i, layer);
- loc->z = offset / mip->img_stride;
- offset -= loc->z * mip->img_stride;
- loc->z *= desc->block_size.depth;
- loc->y = offset / mip->row_stride;
- offset -= loc->y * mip->row_stride;
- loc->y *= desc->block_size.height;
- loc->x = offset / desc->bytes_per_block;
- loc->x *= desc->block_size.width;
-}
-
-/**
- * svga3dsurface_inc_loc - Clamp increment a surface location with one block
- * size
- * in each dimension.
- * @loc: Pointer to a struct svga3dsurface_loc to be incremented.
- *
- * When computing the size of a range as size = end - start, the range does not
- * include the end element. However a location representing the last byte
- * of a touched region in the backing store *is* included in the range.
- * This function modifies such a location to match the end definition
- * given as start + size which is the one used in a SVGA3dBox.
- */
-static inline void
-svga3dsurface_inc_loc(const struct svga3dsurface_cache *cache,
- struct svga3dsurface_loc *loc)
-{
- const struct svga3d_surface_desc *desc = cache->desc;
- u32 mip = loc->sub_resource % cache->num_mip_levels;
- const struct drm_vmw_size *size = &cache->mip[mip].size;
-
- loc->sub_resource++;
- loc->x += desc->block_size.width;
- if (loc->x > size->width)
- loc->x = size->width;
- loc->y += desc->block_size.height;
- if (loc->y > size->height)
- loc->y = size->height;
- loc->z += desc->block_size.depth;
- if (loc->z > size->depth)
- loc->z = size->depth;
-}
-
-/**
- * svga3dsurface_min_loc - The start location in a subresource
- * @cache: Surface layout data.
- * @sub_resource: The subresource.
- * @loc: Pointer to a struct svga3dsurface_loc to be filled in.
- */
-static inline void
-svga3dsurface_min_loc(const struct svga3dsurface_cache *cache,
- u32 sub_resource,
- struct svga3dsurface_loc *loc)
-{
- loc->sub_resource = sub_resource;
- loc->x = loc->y = loc->z = 0;
-}
-
-/**
- * svga3dsurface_min_loc - The end location in a subresource
- * @cache: Surface layout data.
- * @sub_resource: The subresource.
- * @loc: Pointer to a struct svga3dsurface_loc to be filled in.
- *
- * Following the end definition given in svga3dsurface_inc_loc(),
- * Compute the end location of a surface subresource.
- */
-static inline void
-svga3dsurface_max_loc(const struct svga3dsurface_cache *cache,
- u32 sub_resource,
- struct svga3dsurface_loc *loc)
-{
- const struct drm_vmw_size *size;
- u32 mip;
-
- loc->sub_resource = sub_resource + 1;
- mip = sub_resource % cache->num_mip_levels;
- size = &cache->mip[mip].size;
- loc->x = size->width;
- loc->y = size->height;
- loc->z = size->depth;
-}
-
#endif /* _SVGA3D_SURFACEDEFS_H_ */
* Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
*/
+#include <drm/ttm/ttm_module.h>
#include <linux/atomic.h>
#include <linux/errno.h>
#include <linux/wait.h>
init_waitqueue_head(&lock->queue);
lock->rw = 0;
lock->flags = 0;
+ lock->kill_takers = false;
+ lock->signal = SIGKILL;
}
void ttm_read_unlock(struct ttm_lock *lock)
bool locked = false;
spin_lock(&lock->lock);
+ if (unlikely(lock->kill_takers)) {
+ send_sig(lock->signal, current, 0);
+ spin_unlock(&lock->lock);
+ return false;
+ }
if (lock->rw >= 0 && lock->flags == 0) {
++lock->rw;
locked = true;
*locked = false;
spin_lock(&lock->lock);
+ if (unlikely(lock->kill_takers)) {
+ send_sig(lock->signal, current, 0);
+ spin_unlock(&lock->lock);
+ return false;
+ }
if (lock->rw >= 0 && lock->flags == 0) {
++lock->rw;
block = false;
bool locked = false;
spin_lock(&lock->lock);
+ if (unlikely(lock->kill_takers)) {
+ send_sig(lock->signal, current, 0);
+ spin_unlock(&lock->lock);
+ return false;
+ }
if (lock->rw == 0 && ((lock->flags & ~TTM_WRITE_LOCK_PENDING) == 0)) {
lock->rw = -1;
lock->flags &= ~TTM_WRITE_LOCK_PENDING;
return ret;
}
+static int __ttm_vt_unlock(struct ttm_lock *lock)
+{
+ int ret = 0;
+
+ spin_lock(&lock->lock);
+ if (unlikely(!(lock->flags & TTM_VT_LOCK)))
+ ret = -EINVAL;
+ lock->flags &= ~TTM_VT_LOCK;
+ wake_up_all(&lock->queue);
+ spin_unlock(&lock->lock);
+
+ return ret;
+}
+
+static void ttm_vt_lock_remove(struct ttm_base_object **p_base)
+{
+ struct ttm_base_object *base = *p_base;
+ struct ttm_lock *lock = container_of(base, struct ttm_lock, base);
+ int ret;
+
+ *p_base = NULL;
+ ret = __ttm_vt_unlock(lock);
+ BUG_ON(ret != 0);
+}
+
+static bool __ttm_vt_lock(struct ttm_lock *lock)
+{
+ bool locked = false;
+
+ spin_lock(&lock->lock);
+ if (lock->rw == 0) {
+ lock->flags &= ~TTM_VT_LOCK_PENDING;
+ lock->flags |= TTM_VT_LOCK;
+ locked = true;
+ } else {
+ lock->flags |= TTM_VT_LOCK_PENDING;
+ }
+ spin_unlock(&lock->lock);
+ return locked;
+}
+
+int ttm_vt_lock(struct ttm_lock *lock,
+ bool interruptible,
+ struct ttm_object_file *tfile)
+{
+ int ret = 0;
+
+ if (interruptible) {
+ ret = wait_event_interruptible(lock->queue,
+ __ttm_vt_lock(lock));
+ if (unlikely(ret != 0)) {
+ spin_lock(&lock->lock);
+ lock->flags &= ~TTM_VT_LOCK_PENDING;
+ wake_up_all(&lock->queue);
+ spin_unlock(&lock->lock);
+ return ret;
+ }
+ } else
+ wait_event(lock->queue, __ttm_vt_lock(lock));
+
+ /*
+ * Add a base-object, the destructor of which will
+ * make sure the lock is released if the client dies
+ * while holding it.
+ */
+
+ ret = ttm_base_object_init(tfile, &lock->base, false,
+ ttm_lock_type, &ttm_vt_lock_remove, NULL);
+ if (ret)
+ (void)__ttm_vt_unlock(lock);
+ else
+ lock->vt_holder = tfile;
+
+ return ret;
+}
+
+int ttm_vt_unlock(struct ttm_lock *lock)
+{
+ return ttm_ref_object_base_unref(lock->vt_holder,
+ lock->base.handle, TTM_REF_USAGE);
+}
+
void ttm_suspend_unlock(struct ttm_lock *lock)
{
spin_lock(&lock->lock);
* @lock: Spinlock protecting some lock members.
* @rw: Read-write lock counter. Protected by @lock.
* @flags: Lock state. Protected by @lock.
+ * @kill_takers: Boolean whether to kill takers of the lock.
+ * @signal: Signal to send when kill_takers is true.
*/
struct ttm_lock {
spinlock_t lock;
int32_t rw;
uint32_t flags;
+ bool kill_takers;
+ int signal;
+ struct ttm_object_file *vt_holder;
};
*/
extern int ttm_write_lock(struct ttm_lock *lock, bool interruptible);
+/**
+ * ttm_lock_set_kill
+ *
+ * @lock: Pointer to a struct ttm_lock
+ * @val: Boolean whether to kill processes taking the lock.
+ * @signal: Signal to send to the process taking the lock.
+ *
+ * The kill-when-taking-lock functionality is used to kill processes that keep
+ * on using the TTM functionality when its resources has been taken down, for
+ * example when the X server exits. A typical sequence would look like this:
+ * - X server takes lock in write mode.
+ * - ttm_lock_set_kill() is called with @val set to true.
+ * - As part of X server exit, TTM resources are taken down.
+ * - X server releases the lock on file release.
+ * - Another dri client wants to render, takes the lock and is killed.
+ *
+ */
+static inline void ttm_lock_set_kill(struct ttm_lock *lock, bool val,
+ int signal)
+{
+ lock->kill_takers = val;
+ if (val)
+ lock->signal = signal;
+}
+
#endif
{
struct vmw_buffer_object *vmw_bo = vmw_buffer_object(bo);
- WARN_ON(vmw_bo->dirty);
- WARN_ON(!RB_EMPTY_ROOT(&vmw_bo->res_tree));
vmw_bo_unmap(vmw_bo);
kfree(vmw_bo);
}
static void vmw_user_bo_destroy(struct ttm_buffer_object *bo)
{
struct vmw_user_buffer_object *vmw_user_bo = vmw_user_buffer_object(bo);
- struct vmw_buffer_object *vbo = &vmw_user_bo->vbo;
- WARN_ON(vbo->dirty);
- WARN_ON(!RB_EMPTY_ROOT(&vbo->res_tree));
- vmw_bo_unmap(vbo);
+ vmw_bo_unmap(&vmw_user_bo->vbo);
ttm_prime_object_kfree(vmw_user_bo, prime);
}
acc_size = vmw_bo_acc_size(dev_priv, size, user);
memset(vmw_bo, 0, sizeof(*vmw_bo));
- BUILD_BUG_ON(TTM_MAX_BO_PRIORITY <= 3);
- vmw_bo->base.priority = 3;
- vmw_bo->res_tree = RB_ROOT;
+
+ INIT_LIST_HEAD(&vmw_bo->res_list);
ret = ttm_bo_init(bdev, &vmw_bo->base, size,
ttm_bo_type_device, placement,
.res_type = vmw_res_context,
.needs_backup = true,
.may_evict = true,
- .prio = 3,
- .dirty_prio = 3,
.type_name = "guest backed contexts",
.backup_placement = &vmw_mob_placement,
.create = vmw_gb_context_create,
.res_type = vmw_res_dx_context,
.needs_backup = true,
.may_evict = true,
- .prio = 3,
- .dirty_prio = 3,
.type_name = "dx contexts",
.backup_placement = &vmw_mob_placement,
.create = vmw_dx_context_create,
.res_type = vmw_res_cotable,
.needs_backup = true,
.may_evict = true,
- .prio = 3,
- .dirty_prio = 3,
.type_name = "context guest backed object tables",
.backup_placement = &vmw_mob_placement,
.create = vmw_cotable_create,
struct ttm_buffer_object *bo = val_buf->bo;
struct vmw_fence_obj *fence;
- if (!vmw_resource_mob_attached(res))
+ if (list_empty(&res->mob_head))
return 0;
WARN_ON_ONCE(bo->mem.mem_type != VMW_PL_MOB);
goto out_wait;
}
- vmw_resource_mob_detach(res);
res->backup = buf;
res->backup_size = new_size;
vcotbl->size_read_back = cur_size_read_back;
res->backup = old_buf;
res->backup_size = old_size;
vcotbl->size_read_back = old_size_read_back;
- vmw_resource_mob_attach(res);
goto out_wait;
}
- vmw_resource_mob_attach(res);
/* Let go of the old mob. */
+ list_del(&res->mob_head);
+ list_add_tail(&res->mob_head, &buf->res_list);
vmw_bo_unreference(&old_buf);
res->id = vcotbl->type;
* is called before bind() in the validation sequence is instead used for two
* things.
* 1) Unscrub the cotable if it is scrubbed and still attached to a backup
- * buffer.
+ * buffer, that is, if @res->mob_head is non-empty.
* 2) Resize the cotable if needed.
*/
static int vmw_cotable_create(struct vmw_resource *res)
new_size *= 2;
if (likely(new_size <= res->backup_size)) {
- if (vcotbl->scrubbed && vmw_resource_mob_attached(res)) {
+ if (vcotbl->scrubbed && !list_empty(&res->mob_head)) {
ret = vmw_cotable_unscrub(res);
if (ret)
return ret;
static int vmw_assume_16bpp;
static int vmw_probe(struct pci_dev *, const struct pci_device_id *);
+static void vmw_master_init(struct vmw_master *);
static int vmwgfx_pm_notifier(struct notifier_block *nb, unsigned long val,
void *ptr);
DRM_INFO("MMIO at 0x%08x size is %u kiB\n",
dev_priv->mmio_start, dev_priv->mmio_size / 1024);
+ vmw_master_init(&dev_priv->fbdev_master);
+ ttm_lock_set_kill(&dev_priv->fbdev_master.lock, false, SIGTERM);
+ dev_priv->active_master = &dev_priv->fbdev_master;
+
dev_priv->mmio_virt = memremap(dev_priv->mmio_start,
dev_priv->mmio_size, MEMREMAP_WB);
DRM_ERROR("Failed initializing TTM buffer object driver.\n");
goto out_no_bdev;
}
- dev_priv->vm_ops = *dev_priv->bdev.vm_ops;
- dev_priv->vm_ops.fault = vmw_bo_vm_fault;
- dev_priv->vm_ops.pfn_mkwrite = vmw_bo_vm_mkwrite;
- dev_priv->vm_ops.page_mkwrite = vmw_bo_vm_mkwrite;
- dev_priv->bdev.vm_ops = &dev_priv->vm_ops;
/*
* Enable VRAM, but initially don't use it until SVGA is enabled and
static void vmw_postclose(struct drm_device *dev,
struct drm_file *file_priv)
{
- struct vmw_fpriv *vmw_fp = vmw_fpriv(file_priv);
+ struct vmw_fpriv *vmw_fp;
+
+ vmw_fp = vmw_fpriv(file_priv);
+
+ if (vmw_fp->locked_master) {
+ struct vmw_master *vmaster =
+ vmw_master(vmw_fp->locked_master);
+
+ ttm_lock_set_kill(&vmaster->lock, true, SIGTERM);
+ ttm_vt_unlock(&vmaster->lock);
+ drm_master_put(&vmw_fp->locked_master);
+ }
ttm_object_file_release(&vmw_fp->tfile);
kfree(vmw_fp);
return ret;
}
+static struct vmw_master *vmw_master_check(struct drm_device *dev,
+ struct drm_file *file_priv,
+ unsigned int flags)
+{
+ int ret;
+ struct vmw_fpriv *vmw_fp = vmw_fpriv(file_priv);
+ struct vmw_master *vmaster;
+
+ if (!drm_is_primary_client(file_priv) || !(flags & DRM_AUTH))
+ return NULL;
+
+ ret = mutex_lock_interruptible(&dev->master_mutex);
+ if (unlikely(ret != 0))
+ return ERR_PTR(-ERESTARTSYS);
+
+ if (drm_is_current_master(file_priv)) {
+ mutex_unlock(&dev->master_mutex);
+ return NULL;
+ }
+
+ /*
+ * Check if we were previously master, but now dropped. In that
+ * case, allow at least render node functionality.
+ */
+ if (vmw_fp->locked_master) {
+ mutex_unlock(&dev->master_mutex);
+
+ if (flags & DRM_RENDER_ALLOW)
+ return NULL;
+
+ DRM_ERROR("Dropped master trying to access ioctl that "
+ "requires authentication.\n");
+ return ERR_PTR(-EACCES);
+ }
+ mutex_unlock(&dev->master_mutex);
+
+ /*
+ * Take the TTM lock. Possibly sleep waiting for the authenticating
+ * master to become master again, or for a SIGTERM if the
+ * authenticating master exits.
+ */
+ vmaster = vmw_master(file_priv->master);
+ ret = ttm_read_lock(&vmaster->lock, true);
+ if (unlikely(ret != 0))
+ vmaster = ERR_PTR(ret);
+
+ return vmaster;
+}
+
static long vmw_generic_ioctl(struct file *filp, unsigned int cmd,
unsigned long arg,
long (*ioctl_func)(struct file *, unsigned int,
struct drm_file *file_priv = filp->private_data;
struct drm_device *dev = file_priv->minor->dev;
unsigned int nr = DRM_IOCTL_NR(cmd);
+ struct vmw_master *vmaster;
unsigned int flags;
long ret;
} else if (!drm_ioctl_flags(nr, &flags))
return -EINVAL;
- return ioctl_func(filp, cmd, arg);
+ vmaster = vmw_master_check(dev, file_priv, flags);
+ if (IS_ERR(vmaster)) {
+ ret = PTR_ERR(vmaster);
+
+ if (ret != -ERESTARTSYS)
+ DRM_INFO("IOCTL ERROR Command %d, Error %ld.\n",
+ nr, ret);
+ return ret;
+ }
+
+ ret = ioctl_func(filp, cmd, arg);
+ if (vmaster)
+ ttm_read_unlock(&vmaster->lock);
+
+ return ret;
out_io_encoding:
DRM_ERROR("Invalid command format, ioctl %d\n",
{
}
+static void vmw_master_init(struct vmw_master *vmaster)
+{
+ ttm_lock_init(&vmaster->lock);
+}
+
+static int vmw_master_create(struct drm_device *dev,
+ struct drm_master *master)
+{
+ struct vmw_master *vmaster;
+
+ vmaster = kzalloc(sizeof(*vmaster), GFP_KERNEL);
+ if (unlikely(!vmaster))
+ return -ENOMEM;
+
+ vmw_master_init(vmaster);
+ ttm_lock_set_kill(&vmaster->lock, true, SIGTERM);
+ master->driver_priv = vmaster;
+
+ return 0;
+}
+
+static void vmw_master_destroy(struct drm_device *dev,
+ struct drm_master *master)
+{
+ struct vmw_master *vmaster = vmw_master(master);
+
+ master->driver_priv = NULL;
+ kfree(vmaster);
+}
+
static int vmw_master_set(struct drm_device *dev,
struct drm_file *file_priv,
bool from_open)
{
+ struct vmw_private *dev_priv = vmw_priv(dev);
+ struct vmw_fpriv *vmw_fp = vmw_fpriv(file_priv);
+ struct vmw_master *active = dev_priv->active_master;
+ struct vmw_master *vmaster = vmw_master(file_priv->master);
+ int ret = 0;
+
+ if (active) {
+ BUG_ON(active != &dev_priv->fbdev_master);
+ ret = ttm_vt_lock(&active->lock, false, vmw_fp->tfile);
+ if (unlikely(ret != 0))
+ return ret;
+
+ ttm_lock_set_kill(&active->lock, true, SIGTERM);
+ dev_priv->active_master = NULL;
+ }
+
+ ttm_lock_set_kill(&vmaster->lock, false, SIGTERM);
+ if (!from_open) {
+ ttm_vt_unlock(&vmaster->lock);
+ BUG_ON(vmw_fp->locked_master != file_priv->master);
+ drm_master_put(&vmw_fp->locked_master);
+ }
+
+ dev_priv->active_master = vmaster;
+
/*
* Inform a new master that the layout may have changed while
* it was gone.
struct drm_file *file_priv)
{
struct vmw_private *dev_priv = vmw_priv(dev);
+ struct vmw_fpriv *vmw_fp = vmw_fpriv(file_priv);
+ struct vmw_master *vmaster = vmw_master(file_priv->master);
+ int ret;
+
+ /**
+ * Make sure the master doesn't disappear while we have
+ * it locked.
+ */
+ vmw_fp->locked_master = drm_master_get(file_priv->master);
+ ret = ttm_vt_lock(&vmaster->lock, false, vmw_fp->tfile);
vmw_kms_legacy_hotspot_clear(dev_priv);
+ if (unlikely((ret != 0))) {
+ DRM_ERROR("Unable to lock TTM at VT switch.\n");
+ drm_master_put(&vmw_fp->locked_master);
+ }
+
+ ttm_lock_set_kill(&vmaster->lock, false, SIGTERM);
+
if (!dev_priv->enable_fb)
vmw_svga_disable(dev_priv);
+
+ dev_priv->active_master = &dev_priv->fbdev_master;
+ ttm_lock_set_kill(&dev_priv->fbdev_master.lock, false, SIGTERM);
+ ttm_vt_unlock(&dev_priv->fbdev_master.lock);
}
/**
.disable_vblank = vmw_disable_vblank,
.ioctls = vmw_ioctls,
.num_ioctls = ARRAY_SIZE(vmw_ioctls),
+ .master_create = vmw_master_create,
+ .master_destroy = vmw_master_destroy,
.master_set = vmw_master_set,
.master_drop = vmw_master_drop,
.open = vmw_driver_open,
#include <linux/sync_file.h>
#define VMWGFX_DRIVER_NAME "vmwgfx"
-#define VMWGFX_DRIVER_DATE "20190328"
+#define VMWGFX_DRIVER_DATE "20180704"
#define VMWGFX_DRIVER_MAJOR 2
-#define VMWGFX_DRIVER_MINOR 16
+#define VMWGFX_DRIVER_MINOR 15
#define VMWGFX_DRIVER_PATCHLEVEL 0
#define VMWGFX_FIFO_STATIC_SIZE (1024*1024)
#define VMWGFX_MAX_RELOCATIONS 2048
#define VMW_RES_SHADER ttm_driver_type4
struct vmw_fpriv {
+ struct drm_master *locked_master;
struct ttm_object_file *tfile;
bool gb_aware; /* user-space is guest-backed aware */
};
-/**
- * struct vmw_buffer_object - TTM buffer object with vmwgfx additions
- * @base: The TTM buffer object
- * @res_tree: RB tree of resources using this buffer object as a backing MOB
- * @pin_count: pin depth
- * @dx_query_ctx: DX context if this buffer object is used as a DX query MOB
- * @map: Kmap object for semi-persistent mappings
- * @res_prios: Eviction priority counts for attached resources
- * @dirty: structure for user-space dirty-tracking
- */
struct vmw_buffer_object {
struct ttm_buffer_object base;
- struct rb_root res_tree;
+ struct list_head res_list;
s32 pin_count;
/* Not ref-counted. Protected by binding_mutex */
struct vmw_resource *dx_query_ctx;
/* Protected by reservation */
struct ttm_bo_kmap_obj map;
- u32 res_prios[TTM_MAX_BO_PRIORITY];
- struct vmw_bo_dirty *dirty;
};
/**
* @res_dirty: Resource contains data not yet in the backup buffer. Protected
* by resource reserved.
* @backup_dirty: Backup buffer contains data not yet in the HW resource.
- * Protected by resource reserved.
- * @coherent: Emulate coherency by tracking vm accesses.
+ * Protecte by resource reserved.
* @backup: The backup buffer if any. Protected by resource reserved.
* @backup_offset: Offset into the backup buffer if any. Protected by resource
* reserved. Note that only a few resource types can have a @backup_offset
* pin-count greater than zero. It is not on the resource LRU lists and its
* backup buffer is pinned. Hence it can't be evicted.
* @func: Method vtable for this resource. Immutable.
- * @mob_node; Node for the MOB backup rbtree. Protected by @backup reserved.
* @lru_head: List head for the LRU list. Protected by @dev_priv::resource_lock.
+ * @mob_head: List head for the MOB backup list. Protected by @backup reserved.
* @binding_head: List head for the context binding list. Protected by
* the @dev_priv::binding_mutex
* @res_free: The resource destructor.
* @hw_destroy: Callback to destroy the resource on the device, as part of
* resource destruction.
*/
-struct vmw_resource_dirty;
struct vmw_resource {
struct kref kref;
struct vmw_private *dev_priv;
int id;
- u32 used_prio;
unsigned long backup_size;
- u32 res_dirty : 1;
- u32 backup_dirty : 1;
- u32 coherent : 1;
+ bool res_dirty;
+ bool backup_dirty;
struct vmw_buffer_object *backup;
unsigned long backup_offset;
unsigned long pin_count;
const struct vmw_res_func *func;
- struct rb_node mob_node;
struct list_head lru_head;
+ struct list_head mob_head;
struct list_head binding_head;
- struct vmw_resource_dirty *dirty;
void (*res_free) (struct vmw_resource *res);
void (*hw_destroy) (struct vmw_resource *res);
};
struct vmw_legacy_display;
struct vmw_overlay;
+struct vmw_master {
+ struct ttm_lock lock;
+};
+
struct vmw_vga_topology_state {
uint32_t width;
uint32_t height;
spinlock_t svga_lock;
/**
- * PM management.
+ * Master management.
*/
+
+ struct vmw_master *active_master;
+ struct vmw_master fbdev_master;
struct notifier_block pm_nb;
bool refuse_hibernation;
bool suspend_locked;
/* Validation memory reservation */
struct vmw_validation_mem vvm;
-
- /* VM operations */
- struct vm_operations_struct vm_ops;
};
static inline struct vmw_surface *vmw_res_to_srf(struct vmw_resource *res)
return (struct vmw_fpriv *)file_priv->driver_priv;
}
+static inline struct vmw_master *vmw_master(struct drm_master *master)
+{
+ return (struct vmw_master *) master->driver_priv;
+}
+
/*
* The locking here is fine-grained, so that it is performed once
* for every read- and write operation. This is of course costly, but we
extern struct vmw_resource *vmw_resource_reference(struct vmw_resource *res);
extern struct vmw_resource *
vmw_resource_reference_unless_doomed(struct vmw_resource *res);
-extern int vmw_resource_validate(struct vmw_resource *res, bool intr,
- bool dirtying);
+extern int vmw_resource_validate(struct vmw_resource *res, bool intr);
extern int vmw_resource_reserve(struct vmw_resource *res, bool interruptible,
bool no_backup);
extern bool vmw_resource_needs_backup(const struct vmw_resource *res);
extern int vmw_query_readback_all(struct vmw_buffer_object *dx_query_mob);
extern void vmw_resource_evict_all(struct vmw_private *dev_priv);
extern void vmw_resource_unbind_list(struct vmw_buffer_object *vbo);
-void vmw_resource_mob_attach(struct vmw_resource *res);
-void vmw_resource_mob_detach(struct vmw_resource *res);
-void vmw_resource_dirty_update(struct vmw_resource *res, pgoff_t start,
- pgoff_t end);
-int vmw_resources_clean(struct vmw_buffer_object *vbo, pgoff_t start,
- pgoff_t end, pgoff_t *num_prefault);
-
-/**
- * vmw_resource_mob_attached - Whether a resource currently has a mob attached
- * @res: The resource
- *
- * Return: true if the resource has a mob attached, false otherwise.
- */
-static inline bool vmw_resource_mob_attached(const struct vmw_resource *res)
-{
- return !RB_EMPTY_NODE(&res->mob_node);
-}
/**
* vmw_user_resource_noref_release - release a user resource pointer looked up
ttm_base_object_noref_release();
}
-/**
- * vmw_bo_adjust_prio - Adjust the buffer object eviction priority
- * according to attached resources
- * @vbo: The struct vmw_buffer_object
- */
-static inline void vmw_bo_prio_adjust(struct vmw_buffer_object *vbo)
-{
- int i = ARRAY_SIZE(vbo->res_prios);
-
- while (i--) {
- if (vbo->res_prios[i]) {
- vbo->base.priority = i;
- return;
- }
- }
-
- vbo->base.priority = 3;
-}
-
-/**
- * vmw_bo_prio_add - Notify a buffer object of a newly attached resource
- * eviction priority
- * @vbo: The struct vmw_buffer_object
- * @prio: The resource priority
- *
- * After being notified, the code assigns the highest resource eviction priority
- * to the backing buffer object (mob).
- */
-static inline void vmw_bo_prio_add(struct vmw_buffer_object *vbo, int prio)
-{
- if (vbo->res_prios[prio]++ == 0)
- vmw_bo_prio_adjust(vbo);
-}
-
-/**
- * vmw_bo_prio_del - Notify a buffer object of a resource with a certain
- * priority being removed
- * @vbo: The struct vmw_buffer_object
- * @prio: The resource priority
- *
- * After being notified, the code assigns the highest resource eviction priority
- * to the backing buffer object (mob).
- */
-static inline void vmw_bo_prio_del(struct vmw_buffer_object *vbo, int prio)
-{
- if (--vbo->res_prios[prio] == 0)
- vmw_bo_prio_adjust(vbo);
-}
/**
* Misc Ioctl functionality - vmwgfx_ioctl.c
int vmw_kms_write_svga(struct vmw_private *vmw_priv,
unsigned width, unsigned height, unsigned pitch,
unsigned bpp, unsigned depth);
+void vmw_kms_idle_workqueues(struct vmw_master *vmaster);
bool vmw_kms_validate_mode_vram(struct vmw_private *dev_priv,
uint32_t pitch,
uint32_t height);
#define VMW_DEBUG_USER(fmt, ...) \
DRM_DEBUG_DRIVER(fmt, ##__VA_ARGS__)
-/**
- * VMW_DEBUG_KMS - Debug output for kernel mode-setting
- *
- * This macro is for debugging vmwgfx mode-setting code.
- */
-#define VMW_DEBUG_KMS(fmt, ...) \
- DRM_DEBUG_DRIVER(fmt, ##__VA_ARGS__)
-
-/* Resource dirtying - vmwgfx_page_dirty.c */
-void vmw_bo_dirty_scan(struct vmw_buffer_object *vbo);
-int vmw_bo_dirty_add(struct vmw_buffer_object *vbo);
-void vmw_bo_dirty_transfer_to_res(struct vmw_resource *res);
-void vmw_bo_dirty_clear_res(struct vmw_resource *res);
-void vmw_bo_dirty_release(struct vmw_buffer_object *vbo);
-void vmw_bo_dirty_unmap(struct vmw_buffer_object *vbo,
- pgoff_t start, pgoff_t end);
-vm_fault_t vmw_bo_vm_fault(struct vm_fault *vmf);
-vm_fault_t vmw_bo_vm_mkwrite(struct vm_fault *vmf);
-
/**
* Inline helper functions
*/
offsetof(typeof(*cmd), sid));
cmd = container_of(header, typeof(*cmd), header);
+
return vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface,
VMW_RES_DIRTY_NONE, user_surface_converter,
&cmd->sid, NULL);
if (dev_priv->active_display_unit == vmw_du_screen_target &&
(drm_rect_width(&rects[i]) > dev_priv->stdu_max_width ||
drm_rect_height(&rects[i]) > dev_priv->stdu_max_height)) {
- VMW_DEBUG_KMS("Screen size not supported.\n");
+ DRM_ERROR("Screen size not supported.\n");
return -EINVAL;
}
* limit on primary bounding box
*/
if (pixel_mem > dev_priv->prim_bb_mem) {
- VMW_DEBUG_KMS("Combined output size too large.\n");
+ DRM_ERROR("Combined output size too large.\n");
return -EINVAL;
}
bb_mem = (u64) bounding_box.x2 * bounding_box.y2 * 4;
if (bb_mem > dev_priv->prim_bb_mem) {
- VMW_DEBUG_KMS("Topology is beyond supported limits.\n");
+ DRM_ERROR("Topology is beyond supported limits.\n");
return -EINVAL;
}
}
struct vmw_connector_state *vmw_conn_state;
if (!du->pref_active && new_crtc_state->enable) {
- VMW_DEBUG_KMS("Enabling a disabled display unit\n");
ret = -EINVAL;
goto clean;
}
return ret;
ret = vmw_kms_check_implicit(dev, state);
- if (ret) {
- VMW_DEBUG_KMS("Invalid implicit state\n");
+ if (ret)
return ret;
- }
if (!state->allow_modeset)
return ret;
if (!arg->num_outputs) {
struct drm_rect def_rect = {0, 0, 800, 600};
- VMW_DEBUG_KMS("Default layout x1 = %d y1 = %d x2 = %d y2 = %d\n",
- def_rect.x1, def_rect.y1,
- def_rect.x2, def_rect.y2);
vmw_du_update_layout(dev_priv, 1, &def_rect);
return 0;
}
drm_rects = (struct drm_rect *)rects;
- VMW_DEBUG_KMS("Layout count = %u\n", arg->num_outputs);
for (i = 0; i < arg->num_outputs; i++) {
struct drm_vmw_rect curr_rect;
drm_rects[i].x2 = curr_rect.x + curr_rect.w;
drm_rects[i].y2 = curr_rect.y + curr_rect.h;
- VMW_DEBUG_KMS(" x1 = %d y1 = %d x2 = %d y2 = %d\n",
- drm_rects[i].x1, drm_rects[i].y1,
- drm_rects[i].x2, drm_rects[i].y2);
-
/*
* Currently this check is limiting the topology within
* mode_config->max (which actually is max texture size
if (drm_rects[i].x1 < 0 || drm_rects[i].y1 < 0 ||
drm_rects[i].x2 > mode_config->max_width ||
drm_rects[i].y2 > mode_config->max_height) {
- VMW_DEBUG_KMS("Invalid layout %d %d %d %d\n",
- drm_rects[i].x1, drm_rects[i].y1,
- drm_rects[i].x2, drm_rects[i].y2);
+ DRM_ERROR("Invalid GUI layout.\n");
ret = -EINVAL;
goto out_free;
}
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0 OR MIT
-/**************************************************************************
- *
- * Copyright 2019 VMware, Inc., Palo Alto, CA., USA
- *
- * 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, sub license, 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 NON-INFRINGEMENT. IN NO EVENT SHALL
- * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS 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 "vmwgfx_drv.h"
-
-/*
- * Different methods for tracking dirty:
- * VMW_BO_DIRTY_PAGETABLE - Scan the pagetable for hardware dirty bits
- * VMW_BO_DIRTY_MKWRITE - Write-protect page table entries and record write-
- * accesses in the VM mkwrite() callback
- */
-enum vmw_bo_dirty_method {
- VMW_BO_DIRTY_PAGETABLE,
- VMW_BO_DIRTY_MKWRITE,
-};
-
-/*
- * No dirtied pages at scan trigger a transition to the _MKWRITE method,
- * similarly a certain percentage of dirty pages trigger a transition to
- * the _PAGETABLE method. How many triggers should we wait for before
- * changing method?
- */
-#define VMW_DIRTY_NUM_CHANGE_TRIGGERS 2
-
-/* Percentage to trigger a transition to the _PAGETABLE method */
-#define VMW_DIRTY_PERCENTAGE 10
-
-/**
- * struct vmw_bo_dirty - Dirty information for buffer objects
- * @start: First currently dirty bit
- * @end: Last currently dirty bit + 1
- * @method: The currently used dirty method
- * @change_count: Number of consecutive method change triggers
- * @ref_count: Reference count for this structure
- * @bitmap_size: The size of the bitmap in bits. Typically equal to the
- * nuber of pages in the bo.
- * @size: The accounting size for this struct.
- * @bitmap: A bitmap where each bit represents a page. A set bit means a
- * dirty page.
- */
-struct vmw_bo_dirty {
- unsigned long start;
- unsigned long end;
- enum vmw_bo_dirty_method method;
- unsigned int change_count;
- unsigned int ref_count;
- unsigned long bitmap_size;
- size_t size;
- unsigned long bitmap[0];
-};
-
-/**
- * vmw_bo_dirty_scan_pagetable - Perform a pagetable scan for dirty bits
- * @vbo: The buffer object to scan
- *
- * Scans the pagetable for dirty bits. Clear those bits and modify the
- * dirty structure with the results. This function may change the
- * dirty-tracking method.
- */
-static void vmw_bo_dirty_scan_pagetable(struct vmw_buffer_object *vbo)
-{
- struct vmw_bo_dirty *dirty = vbo->dirty;
- pgoff_t offset = drm_vma_node_start(&vbo->base.vma_node);
- struct address_space *mapping = vbo->base.bdev->dev_mapping;
- pgoff_t num_marked;
-
- num_marked = apply_as_clean(mapping,
- offset, dirty->bitmap_size,
- offset, &dirty->bitmap[0],
- &dirty->start, &dirty->end);
- if (num_marked == 0)
- dirty->change_count++;
- else
- dirty->change_count = 0;
-
- if (dirty->change_count > VMW_DIRTY_NUM_CHANGE_TRIGGERS) {
- dirty->change_count = 0;
- dirty->method = VMW_BO_DIRTY_MKWRITE;
- apply_as_wrprotect(mapping,
- offset, dirty->bitmap_size);
- apply_as_clean(mapping,
- offset, dirty->bitmap_size,
- offset, &dirty->bitmap[0],
- &dirty->start, &dirty->end);
- }
-}
-
-/**
- * vmw_bo_dirty_scan_mkwrite - Reset the mkwrite dirty-tracking method
- * @vbo: The buffer object to scan
- *
- * Write-protect pages written to so that consecutive write accesses will
- * trigger a call to mkwrite.
- *
- * This function may change the dirty-tracking method.
- */
-static void vmw_bo_dirty_scan_mkwrite(struct vmw_buffer_object *vbo)
-{
- struct vmw_bo_dirty *dirty = vbo->dirty;
- unsigned long offset = drm_vma_node_start(&vbo->base.vma_node);
- struct address_space *mapping = vbo->base.bdev->dev_mapping;
- pgoff_t num_marked;
-
- if (dirty->end <= dirty->start)
- return;
-
- num_marked = apply_as_wrprotect(vbo->base.bdev->dev_mapping,
- dirty->start + offset,
- dirty->end - dirty->start);
-
- if (100UL * num_marked / dirty->bitmap_size >
- VMW_DIRTY_PERCENTAGE) {
- dirty->change_count++;
- } else {
- dirty->change_count = 0;
- }
-
- if (dirty->change_count > VMW_DIRTY_NUM_CHANGE_TRIGGERS) {
- pgoff_t start = 0;
- pgoff_t end = dirty->bitmap_size;
-
- dirty->method = VMW_BO_DIRTY_PAGETABLE;
- apply_as_clean(mapping, offset, end, offset, &dirty->bitmap[0],
- &start, &end);
- bitmap_clear(&dirty->bitmap[0], 0, dirty->bitmap_size);
- if (dirty->start < dirty->end)
- bitmap_set(&dirty->bitmap[0], dirty->start,
- dirty->end - dirty->start);
- dirty->change_count = 0;
- }
-}
-
-/**
- * vmw_bo_dirty_scan - Scan for dirty pages and add them to the dirty
- * tracking structure
- * @vbo: The buffer object to scan
- *
- * This function may change the dirty tracking method.
- */
-void vmw_bo_dirty_scan(struct vmw_buffer_object *vbo)
-{
- struct vmw_bo_dirty *dirty = vbo->dirty;
-
- if (dirty->method == VMW_BO_DIRTY_PAGETABLE)
- vmw_bo_dirty_scan_pagetable(vbo);
- else
- vmw_bo_dirty_scan_mkwrite(vbo);
-}
-
-/**
- * vmw_bo_dirty_pre_unmap - write-protect and pick up dirty pages before
- * an unmap_mapping_range operation.
- * @vbo: The buffer object,
- * @start: First page of the range within the buffer object.
- * @end: Last page of the range within the buffer object + 1.
- *
- * If we're using the _PAGETABLE scan method, we may leak dirty pages
- * when calling unmap_mapping_range(). This function makes sure we pick
- * up all dirty pages.
- */
-static void vmw_bo_dirty_pre_unmap(struct vmw_buffer_object *vbo,
- pgoff_t start, pgoff_t end)
-{
- struct vmw_bo_dirty *dirty = vbo->dirty;
- unsigned long offset = drm_vma_node_start(&vbo->base.vma_node);
- struct address_space *mapping = vbo->base.bdev->dev_mapping;
-
- if (dirty->method != VMW_BO_DIRTY_PAGETABLE || start >= end)
- return;
-
- apply_as_wrprotect(mapping, start + offset, end - start);
- apply_as_clean(mapping, start + offset, end - start, offset,
- &dirty->bitmap[0], &dirty->start, &dirty->end);
-}
-
-/**
- * vmw_bo_dirty_unmap - Clear all ptes pointing to a range within a bo
- * @vbo: The buffer object,
- * @start: First page of the range within the buffer object.
- * @end: Last page of the range within the buffer object + 1.
- *
- * This is similar to ttm_bo_unmap_virtual_locked() except it takes a subrange.
- */
-void vmw_bo_dirty_unmap(struct vmw_buffer_object *vbo,
- pgoff_t start, pgoff_t end)
-{
- unsigned long offset = drm_vma_node_start(&vbo->base.vma_node);
- struct address_space *mapping = vbo->base.bdev->dev_mapping;
-
- vmw_bo_dirty_pre_unmap(vbo, start, end);
- unmap_shared_mapping_range(mapping, (offset + start) << PAGE_SHIFT,
- (loff_t) (end - start) << PAGE_SHIFT);
-}
-
-/**
- * vmw_bo_dirty_add - Add a dirty-tracking user to a buffer object
- * @vbo: The buffer object
- *
- * This function registers a dirty-tracking user to a buffer object.
- * A user can be for example a resource or a vma in a special user-space
- * mapping.
- *
- * Return: Zero on success, -ENOMEM on memory allocation failure.
- */
-int vmw_bo_dirty_add(struct vmw_buffer_object *vbo)
-{
- struct vmw_bo_dirty *dirty = vbo->dirty;
- pgoff_t num_pages = vbo->base.num_pages;
- size_t size, acc_size;
- int ret;
- static struct ttm_operation_ctx ctx = {
- .interruptible = false,
- .no_wait_gpu = false
- };
-
- if (dirty) {
- dirty->ref_count++;
- return 0;
- }
-
- size = sizeof(*dirty) + BITS_TO_LONGS(num_pages) * sizeof(long);
- acc_size = ttm_round_pot(size);
- ret = ttm_mem_global_alloc(&ttm_mem_glob, acc_size, &ctx);
- if (ret) {
- VMW_DEBUG_USER("Out of graphics memory for buffer object "
- "dirty tracker.\n");
- return ret;
- }
- dirty = kvzalloc(size, GFP_KERNEL);
- if (!dirty) {
- ret = -ENOMEM;
- goto out_no_dirty;
- }
-
- dirty->size = acc_size;
- dirty->bitmap_size = num_pages;
- dirty->start = dirty->bitmap_size;
- dirty->end = 0;
- dirty->ref_count = 1;
- if (num_pages < PAGE_SIZE / sizeof(pte_t)) {
- dirty->method = VMW_BO_DIRTY_PAGETABLE;
- } else {
- struct address_space *mapping = vbo->base.bdev->dev_mapping;
- pgoff_t offset = drm_vma_node_start(&vbo->base.vma_node);
-
- dirty->method = VMW_BO_DIRTY_MKWRITE;
-
- /* Write-protect and then pick up already dirty bits */
- apply_as_wrprotect(mapping, offset, num_pages);
- apply_as_clean(mapping, offset, num_pages, offset,
- &dirty->bitmap[0], &dirty->start, &dirty->end);
- }
-
- vbo->dirty = dirty;
-
- return 0;
-
-out_no_dirty:
- ttm_mem_global_free(&ttm_mem_glob, acc_size);
- return ret;
-}
-
-/**
- * vmw_bo_dirty_release - Release a dirty-tracking user from a buffer object
- * @vbo: The buffer object
- *
- * This function releases a dirty-tracking user from a buffer object.
- * If the reference count reaches zero, then the dirty-tracking object is
- * freed and the pointer to it cleared.
- *
- * Return: Zero on success, -ENOMEM on memory allocation failure.
- */
-void vmw_bo_dirty_release(struct vmw_buffer_object *vbo)
-{
- struct vmw_bo_dirty *dirty = vbo->dirty;
-
- if (dirty && --dirty->ref_count == 0) {
- size_t acc_size = dirty->size;
-
- kvfree(dirty);
- ttm_mem_global_free(&ttm_mem_glob, acc_size);
- vbo->dirty = NULL;
- }
-}
-
-/**
- * vmw_bo_dirty_transfer_to_res - Pick up a resource's dirty region from
- * its backing mob.
- * @res: The resource
- *
- * This function will pick up all dirty ranges affecting the resource from
- * it's backup mob, and call vmw_resource_dirty_update() once for each
- * range. The transferred ranges will be cleared from the backing mob's
- * dirty tracking.
- */
-void vmw_bo_dirty_transfer_to_res(struct vmw_resource *res)
-{
- struct vmw_buffer_object *vbo = res->backup;
- struct vmw_bo_dirty *dirty = vbo->dirty;
- pgoff_t start, cur, end;
- unsigned long res_start = res->backup_offset;
- unsigned long res_end = res->backup_offset + res->backup_size;
-
- WARN_ON_ONCE(res_start & ~PAGE_MASK);
- res_start >>= PAGE_SHIFT;
- res_end = DIV_ROUND_UP(res_end, PAGE_SIZE);
-
- if (res_start >= dirty->end || res_end <= dirty->start)
- return;
-
- cur = max(res_start, dirty->start);
- res_end = max(res_end, dirty->end);
- while (cur < res_end) {
- unsigned long num;
-
- start = find_next_bit(&dirty->bitmap[0], res_end, cur);
- if (start >= res_end)
- break;
-
- end = find_next_zero_bit(&dirty->bitmap[0], res_end, start + 1);
- cur = end + 1;
- num = end - start;
- bitmap_clear(&dirty->bitmap[0], start, num);
- vmw_resource_dirty_update(res, start, end);
- }
-
- if (res_start <= dirty->start && res_end > dirty->start)
- dirty->start = res_end;
- if (res_start < dirty->end && res_end >= dirty->end)
- dirty->end = res_start;
-}
-
-/**
- * vmw_bo_dirty_clear_res - Clear a resource's dirty region from
- * its backing mob.
- * @res: The resource
- *
- * This function will clear all dirty ranges affecting the resource from
- * it's backup mob's dirty tracking.
- */
-void vmw_bo_dirty_clear_res(struct vmw_resource *res)
-{
- unsigned long res_start = res->backup_offset;
- unsigned long res_end = res->backup_offset + res->backup_size;
- struct vmw_buffer_object *vbo = res->backup;
- struct vmw_bo_dirty *dirty = vbo->dirty;
-
- res_start >>= PAGE_SHIFT;
- res_end = DIV_ROUND_UP(res_end, PAGE_SIZE);
-
- if (res_start >= dirty->end || res_end <= dirty->start)
- return;
-
- res_start = max(res_start, dirty->start);
- res_end = min(res_end, dirty->end);
- bitmap_clear(&dirty->bitmap[0], res_start, res_end - res_start);
-
- if (res_start <= dirty->start && res_end > dirty->start)
- dirty->start = res_end;
- if (res_start < dirty->end && res_end >= dirty->end)
- dirty->end = res_start;
-}
-
-vm_fault_t vmw_bo_vm_mkwrite(struct vm_fault *vmf)
-{
- struct vm_area_struct *vma = vmf->vma;
- struct ttm_buffer_object *bo = (struct ttm_buffer_object *)
- vma->vm_private_data;
- vm_fault_t ret;
- unsigned long page_offset;
- struct vmw_buffer_object *vbo =
- container_of(bo, typeof(*vbo), base);
-
- ret = ttm_bo_vm_reserve(bo, vmf);
- if (ret)
- return ret;
-
- page_offset = vmf->pgoff - drm_vma_node_start(&bo->vma_node);
- if (unlikely(page_offset >= bo->num_pages)) {
- ret = VM_FAULT_SIGBUS;
- goto out_unlock;
- }
-
- if (vbo->dirty && vbo->dirty->method == VMW_BO_DIRTY_MKWRITE &&
- !test_bit(page_offset, &vbo->dirty->bitmap[0])) {
- struct vmw_bo_dirty *dirty = vbo->dirty;
-
- __set_bit(page_offset, &dirty->bitmap[0]);
- dirty->start = min(dirty->start, page_offset);
- dirty->end = max(dirty->end, page_offset + 1);
- }
-
-out_unlock:
- reservation_object_unlock(bo->resv);
- return ret;
-}
-
-vm_fault_t vmw_bo_vm_fault(struct vm_fault *vmf)
-{
- struct vm_area_struct *vma = vmf->vma;
- struct ttm_buffer_object *bo = (struct ttm_buffer_object *)
- vma->vm_private_data;
- struct vmw_buffer_object *vbo =
- container_of(bo, struct vmw_buffer_object, base);
- pgoff_t num_prefault;
- pgprot_t prot;
- vm_fault_t ret;
-
- ret = ttm_bo_vm_reserve(bo, vmf);
- if (ret)
- return ret;
-
- num_prefault = (vma->vm_flags & VM_RAND_READ) ? 1 :
- TTM_BO_VM_NUM_PREFAULT;
-
- if (vbo->dirty) {
- pgoff_t allowed_prefault;
- unsigned long page_offset;
-
- page_offset = vmf->pgoff - drm_vma_node_start(&bo->vma_node);
- if (page_offset >= bo->num_pages ||
- vmw_resources_clean(vbo, page_offset,
- page_offset + PAGE_SIZE,
- &allowed_prefault)) {
- ret = VM_FAULT_SIGBUS;
- goto out_unlock;
- }
-
- num_prefault = min(num_prefault, allowed_prefault);
- }
-
- /*
- * If we don't track dirty using the MKWRITE method, make sure
- * sure the page protection is write-enabled so we don't get
- * a lot of unnecessary write faults.
- */
- if (vbo->dirty && vbo->dirty->method == VMW_BO_DIRTY_MKWRITE)
- prot = vma->vm_page_prot;
- else
- prot = vm_get_page_prot(vma->vm_flags);
-
- ret = ttm_bo_vm_fault_reserved(vmf, prot, num_prefault);
- if (ret == VM_FAULT_RETRY && !(vmf->flags & FAULT_FLAG_RETRY_NOWAIT))
- return ret;
-
-out_unlock:
- reservation_object_unlock(bo->resv);
- return ret;
-}
#define VMW_RES_EVICT_ERR_COUNT 10
-/**
- * vmw_resource_mob_attach - Mark a resource as attached to its backing mob
- * @res: The resource
- */
-void vmw_resource_mob_attach(struct vmw_resource *res)
-{
- struct vmw_buffer_object *backup = res->backup;
- struct rb_node **new = &backup->res_tree.rb_node, *parent = NULL;
-
- lockdep_assert_held(&backup->base.resv->lock.base);
- res->used_prio = (res->res_dirty) ? res->func->dirty_prio :
- res->func->prio;
-
- while (*new) {
- struct vmw_resource *this =
- container_of(*new, struct vmw_resource, mob_node);
-
- parent = *new;
- new = (res->backup_offset < this->backup_offset) ?
- &((*new)->rb_left) : &((*new)->rb_right);
- }
-
- rb_link_node(&res->mob_node, parent, new);
- rb_insert_color(&res->mob_node, &backup->res_tree);
-
- vmw_bo_prio_add(backup, res->used_prio);
-}
-
-/**
- * vmw_resource_mob_detach - Mark a resource as detached from its backing mob
- * @res: The resource
- */
-void vmw_resource_mob_detach(struct vmw_resource *res)
-{
- struct vmw_buffer_object *backup = res->backup;
-
- lockdep_assert_held(&backup->base.resv->lock.base);
- if (vmw_resource_mob_attached(res)) {
- rb_erase(&res->mob_node, &backup->res_tree);
- RB_CLEAR_NODE(&res->mob_node);
- vmw_bo_prio_del(backup, res->used_prio);
- }
-}
-
-
struct vmw_resource *vmw_resource_reference(struct vmw_resource *res)
{
kref_get(&res->kref);
struct ttm_buffer_object *bo = &res->backup->base;
ttm_bo_reserve(bo, false, false, NULL);
- if (vmw_resource_mob_attached(res) &&
+ if (!list_empty(&res->mob_head) &&
res->func->unbind != NULL) {
struct ttm_validate_buffer val_buf;
res->func->unbind(res, false, &val_buf);
}
res->backup_dirty = false;
- vmw_resource_mob_detach(res);
- if (res->dirty)
- res->func->dirty_free(res);
- if (res->coherent)
- vmw_bo_dirty_release(res->backup);
+ list_del_init(&res->mob_head);
ttm_bo_unreserve(bo);
vmw_bo_unreference(&res->backup);
}
res->res_free = res_free;
res->dev_priv = dev_priv;
res->func = func;
- RB_CLEAR_NODE(&res->mob_node);
INIT_LIST_HEAD(&res->lru_head);
+ INIT_LIST_HEAD(&res->mob_head);
INIT_LIST_HEAD(&res->binding_head);
res->id = -1;
res->backup = NULL;
res->backup_offset = 0;
res->backup_dirty = false;
res->res_dirty = false;
- res->coherent = false;
- res->used_prio = 3;
- res->dirty = NULL;
if (delay_id)
return 0;
else
* should be retried once resources have been freed up.
*/
static int vmw_resource_do_validate(struct vmw_resource *res,
- struct ttm_validate_buffer *val_buf,
- bool dirtying)
+ struct ttm_validate_buffer *val_buf)
{
int ret = 0;
const struct vmw_res_func *func = res->func;
}
if (func->bind &&
- ((func->needs_backup && !vmw_resource_mob_attached(res) &&
+ ((func->needs_backup && list_empty(&res->mob_head) &&
val_buf->bo != NULL) ||
(!func->needs_backup && val_buf->bo != NULL))) {
ret = func->bind(res, val_buf);
if (unlikely(ret != 0))
goto out_bind_failed;
if (func->needs_backup)
- vmw_resource_mob_attach(res);
- }
-
- /*
- * Handle the case where the backup mob is marked coherent but
- * the resource isn't.
- */
- if (func->dirty_alloc && vmw_resource_mob_attached(res) &&
- !res->coherent) {
- if (res->backup->dirty && !res->dirty) {
- ret = func->dirty_alloc(res);
- if (ret)
- return ret;
- } else if (!res->backup->dirty && res->dirty) {
- func->dirty_free(res);
- }
- }
-
- /*
- * Transfer the dirty regions to the resource and update
- * the resource.
- */
- if (res->dirty) {
- if (dirtying && !res->res_dirty) {
- pgoff_t start = res->backup_offset >> PAGE_SHIFT;
- pgoff_t end = __KERNEL_DIV_ROUND_UP
- (res->backup_offset + res->backup_size,
- PAGE_SIZE);
-
- vmw_bo_dirty_unmap(res->backup, start, end);
- }
-
- vmw_bo_dirty_transfer_to_res(res);
- return func->dirty_sync(res);
+ list_add_tail(&res->mob_head, &res->backup->res_list);
}
return 0;
if (switch_backup && new_backup != res->backup) {
if (res->backup) {
- vmw_resource_mob_detach(res);
- if (res->coherent)
- vmw_bo_dirty_release(res->backup);
+ lockdep_assert_held(&res->backup->base.resv->lock.base);
+ list_del_init(&res->mob_head);
vmw_bo_unreference(&res->backup);
}
if (new_backup) {
res->backup = vmw_bo_reference(new_backup);
-
- /*
- * The validation code should already have added a
- * dirty tracker here.
- */
- WARN_ON(res->coherent && !new_backup->dirty);
-
- vmw_resource_mob_attach(res);
+ lockdep_assert_held(&new_backup->base.resv->lock.base);
+ list_add_tail(&res->mob_head, &new_backup->res_list);
} else {
res->backup = NULL;
}
- } else if (switch_backup && res->coherent) {
- vmw_bo_dirty_release(res->backup);
}
-
if (switch_backup)
res->backup_offset = new_backup_offset;
if (unlikely(ret != 0))
goto out_no_reserve;
- if (res->func->needs_backup && !vmw_resource_mob_attached(res))
+ if (res->func->needs_backup && list_empty(&res->mob_head))
return 0;
backup_dirty = res->backup_dirty;
return ret;
if (unlikely(func->unbind != NULL &&
- (!func->needs_backup || vmw_resource_mob_attached(res)))) {
+ (!func->needs_backup || !list_empty(&res->mob_head)))) {
ret = func->unbind(res, res->res_dirty, &val_buf);
if (unlikely(ret != 0))
goto out_no_unbind;
- vmw_resource_mob_detach(res);
+ list_del_init(&res->mob_head);
}
ret = func->destroy(res);
res->backup_dirty = true;
* to the device.
* @res: The resource to make visible to the device.
* @intr: Perform waits interruptible if possible.
- * @dirtying: Pending GPU operation will dirty the resource
*
* On succesful return, any backup DMA buffer pointed to by @res->backup will
* be reserved and validated.
* Return: Zero on success, -ERESTARTSYS if interrupted, negative error code
* on failure.
*/
-int vmw_resource_validate(struct vmw_resource *res, bool intr,
- bool dirtying)
+int vmw_resource_validate(struct vmw_resource *res, bool intr)
{
int ret;
struct vmw_resource *evict_res;
if (res->backup)
val_buf.bo = &res->backup->base;
do {
- ret = vmw_resource_do_validate(res, &val_buf, dirtying);
+ ret = vmw_resource_do_validate(res, &val_buf);
if (likely(ret != -EBUSY))
break;
if (unlikely(ret != 0))
goto out_no_validate;
else if (!res->func->needs_backup && res->backup) {
- WARN_ON_ONCE(vmw_resource_mob_attached(res));
+ list_del_init(&res->mob_head);
vmw_bo_unreference(&res->backup);
}
*/
void vmw_resource_unbind_list(struct vmw_buffer_object *vbo)
{
+
+ struct vmw_resource *res, *next;
struct ttm_validate_buffer val_buf = {
.bo = &vbo->base,
.num_shared = 0
};
lockdep_assert_held(&vbo->base.resv->lock.base);
- while (!RB_EMPTY_ROOT(&vbo->res_tree)) {
- struct rb_node *node = vbo->res_tree.rb_node;
- struct vmw_resource *res =
- container_of(node, struct vmw_resource, mob_node);
-
- if (!WARN_ON_ONCE(!res->func->unbind))
- (void) res->func->unbind(res, res->res_dirty, &val_buf);
+ list_for_each_entry_safe(res, next, &vbo->res_list, mob_head) {
+ if (!res->func->unbind)
+ continue;
+ (void) res->func->unbind(res, res->res_dirty, &val_buf);
res->backup_dirty = true;
res->res_dirty = false;
- vmw_resource_mob_detach(res);
+ list_del_init(&res->mob_head);
}
(void) ttm_bo_wait(&vbo->base, false, false);
/* Do we really need to pin the MOB as well? */
vmw_bo_pin_reserved(vbo, true);
}
- ret = vmw_resource_validate(res, interruptible, true);
+ ret = vmw_resource_validate(res, interruptible);
if (vbo)
ttm_bo_unreserve(&vbo->base);
if (ret)
{
return res->func->res_type;
}
-
-/**
- * vmw_resource_update_dirty - Update a resource's dirty tracker with a
- * sequential range of touched backing store memory.
- * @res: The resource.
- * @start: The first page touched.
- * @end: The last page touched + 1.
- */
-void vmw_resource_dirty_update(struct vmw_resource *res, pgoff_t start,
- pgoff_t end)
-{
- if (res->dirty)
- res->func->dirty_range_add(res, start << PAGE_SHIFT,
- end << PAGE_SHIFT);
-}
-
-/**
- * vmw_resources_clean - Clean resources intersecting a mob range
- * @vbo: The mob buffer object
- * @start: The mob page offset starting the range
- * @end: The mob page offset ending the range
- * @num_prefault: Returns how many pages including the first have been
- * cleaned and are ok to prefault
- */
-int vmw_resources_clean(struct vmw_buffer_object *vbo, pgoff_t start,
- pgoff_t end, pgoff_t *num_prefault)
-{
- struct rb_node *cur = vbo->res_tree.rb_node;
- struct vmw_resource *found = NULL;
- unsigned long res_start = start << PAGE_SHIFT;
- unsigned long res_end = end << PAGE_SHIFT;
- unsigned long last_cleaned = 0;
-
- /*
- * Find the resource with lowest backup_offset that intersects the
- * range.
- */
- while (cur) {
- struct vmw_resource *cur_res =
- container_of(cur, struct vmw_resource, mob_node);
-
- if (cur_res->backup_offset >= res_end) {
- cur = cur->rb_left;
- } else if (cur_res->backup_offset + cur_res->backup_size <=
- res_start) {
- cur = cur->rb_right;
- } else {
- found = cur_res;
- cur = cur->rb_left;
- /* Continue to look for resources with lower offsets */
- }
- }
-
- /*
- * In order of increasing backup_offset, clean dirty resorces
- * intersecting the range.
- */
- while (found) {
- if (found->res_dirty) {
- int ret;
-
- if (!found->func->clean)
- return -EINVAL;
-
- ret = found->func->clean(found);
- if (ret)
- return ret;
-
- found->res_dirty = false;
- }
- last_cleaned = found->backup_offset + found->backup_size;
- cur = rb_next(&found->mob_node);
- if (!cur)
- break;
-
- found = container_of(cur, struct vmw_resource, mob_node);
- if (found->backup_offset >= res_end)
- break;
- }
-
- /*
- * Set number of pages allowed prefaulting and fence the buffer object
- */
- *num_prefault = 1;
- if (last_cleaned > res_start) {
- struct ttm_buffer_object *bo = &vbo->base;
-
- *num_prefault = __KERNEL_DIV_ROUND_UP(last_cleaned - res_start,
- PAGE_SIZE);
- vmw_bo_fence_single(bo, NULL);
- if (bo->moving)
- dma_fence_put(bo->moving);
- bo->moving = dma_fence_get
- (reservation_object_get_excl(bo->resv));
- }
-
- return 0;
-}
* @commit_notify: If the resource is a command buffer managed resource,
* callback to notify that a define or remove command
* has been committed to the device.
- * @dirty_alloc: Allocate a dirty tracker. NULL if dirty-tracking is not
- * supported.
- * @dirty_free: Free the dirty tracker.
- * @dirty_sync: Upload the dirty mob contents to the resource.
- * @dirty_add_range: Add a sequential dirty range to the resource
- * dirty tracker.
- * @clean: Clean the resource.
*/
struct vmw_res_func {
enum vmw_res_type res_type;
const char *type_name;
struct ttm_placement *backup_placement;
bool may_evict;
- u32 prio;
- u32 dirty_prio;
int (*create) (struct vmw_resource *res);
int (*destroy) (struct vmw_resource *res);
struct ttm_validate_buffer *val_buf);
void (*commit_notify)(struct vmw_resource *res,
enum vmw_cmdbuf_res_state state);
- int (*dirty_alloc)(struct vmw_resource *res);
- void (*dirty_free)(struct vmw_resource *res);
- int (*dirty_sync)(struct vmw_resource *res);
- void (*dirty_range_add)(struct vmw_resource *res, size_t start,
- size_t end);
- int (*clean)(struct vmw_resource *res);
};
/**
.res_type = vmw_res_shader,
.needs_backup = true,
.may_evict = true,
- .prio = 3,
- .dirty_prio = 3,
.type_name = "guest backed shaders",
.backup_placement = &vmw_mob_placement,
.create = vmw_gb_shader_create,
static const struct vmw_res_func vmw_dx_shader_func = {
.res_type = vmw_res_shader,
.needs_backup = true,
- .may_evict = true,
- .prio = 3,
- .dirty_prio = 3,
+ .may_evict = false,
.type_name = "dx shaders",
.backup_placement = &vmw_mob_placement,
.create = vmw_dx_shader_create,
WARN_ON_ONCE(!shader->committed);
- if (vmw_resource_mob_attached(res)) {
+ if (!list_empty(&res->mob_head)) {
mutex_lock(&dev_priv->binding_mutex);
ret = vmw_dx_shader_unscrub(res);
mutex_unlock(&dev_priv->binding_mutex);
uint32_t bo_offset;
};
-/**
- * vmw_surface_dirty - Surface dirty-tracker
- * @cache: Cached layout information of the surface.
- * @size: Accounting size for the struct vmw_surface_dirty.
- * @num_subres: Number of subresources.
- * @boxes: Array of SVGA3dBoxes indicating dirty regions. One per subresource.
- */
-struct vmw_surface_dirty {
- struct svga3dsurface_cache cache;
- size_t size;
- u32 num_subres;
- SVGA3dBox boxes[0];
-};
-
static void vmw_user_surface_free(struct vmw_resource *res);
static struct vmw_resource *
vmw_user_surface_base_to_res(struct ttm_base_object *base);
struct drm_vmw_gb_surface_ref_ext_rep *rep,
struct drm_file *file_priv);
-static void vmw_surface_dirty_free(struct vmw_resource *res);
-static int vmw_surface_dirty_alloc(struct vmw_resource *res);
-static int vmw_surface_dirty_sync(struct vmw_resource *res);
-static void vmw_surface_dirty_range_add(struct vmw_resource *res, size_t start,
- size_t end);
-static int vmw_surface_clean(struct vmw_resource *res);
-
static const struct vmw_user_resource_conv user_surface_conv = {
.object_type = VMW_RES_SURFACE,
.base_obj_to_res = vmw_user_surface_base_to_res,
.res_type = vmw_res_surface,
.needs_backup = false,
.may_evict = true,
- .prio = 1,
- .dirty_prio = 1,
.type_name = "legacy surfaces",
.backup_placement = &vmw_srf_placement,
.create = &vmw_legacy_srf_create,
.res_type = vmw_res_surface,
.needs_backup = true,
.may_evict = true,
- .prio = 1,
- .dirty_prio = 2,
.type_name = "guest backed surfaces",
.backup_placement = &vmw_mob_placement,
.create = vmw_gb_surface_create,
.destroy = vmw_gb_surface_destroy,
.bind = vmw_gb_surface_bind,
- .unbind = vmw_gb_surface_unbind,
- .dirty_alloc = vmw_surface_dirty_alloc,
- .dirty_free = vmw_surface_dirty_free,
- .dirty_sync = vmw_surface_dirty_sync,
- .dirty_range_add = vmw_surface_dirty_range_add,
- .clean = vmw_surface_clean,
+ .unbind = vmw_gb_surface_unbind
};
/**
struct vmw_private *dev_priv = srf->res.dev_priv;
uint32_t size = user_srf->size;
- WARN_ON_ONCE(res->dirty);
if (user_srf->master)
drm_master_put(&user_srf->master);
kfree(srf->offsets);
if (unlikely(drm_is_render_client(file_priv)))
require_exist = true;
+ if (READ_ONCE(vmw_fpriv(file_priv)->locked_master)) {
+ DRM_ERROR("Locked master refused legacy "
+ "surface reference.\n");
+ return -EACCES;
+ }
+
handle = u_handle;
}
cmd2->header.id = SVGA_3D_CMD_UPDATE_GB_SURFACE;
cmd2->header.size = sizeof(cmd2->body);
cmd2->body.sid = res->id;
+ res->backup_dirty = false;
}
vmw_fifo_commit(dev_priv, submit_size);
- if (res->backup->dirty && res->backup_dirty) {
- /* We've just made a full upload. Cear dirty regions. */
- vmw_bo_dirty_clear_res(res);
- }
-
- res->backup_dirty = false;
-
return 0;
}
}
}
} else if (req->base.drm_surface_flags &
- (drm_vmw_surface_flag_create_buffer |
- drm_vmw_surface_flag_coherent))
+ drm_vmw_surface_flag_create_buffer)
ret = vmw_user_bo_alloc(dev_priv, tfile,
res->backup_size,
req->base.drm_surface_flags &
goto out_unlock;
}
- if (req->base.drm_surface_flags & drm_vmw_surface_flag_coherent) {
- struct vmw_buffer_object *backup = res->backup;
-
- ttm_bo_reserve(&backup->base, false, false, NULL);
- if (!res->func->dirty_alloc)
- ret = -EINVAL;
- if (!ret)
- ret = vmw_bo_dirty_add(backup);
- if (!ret) {
- res->coherent = true;
- ret = res->func->dirty_alloc(res);
- }
- ttm_bo_unreserve(&backup->base);
- if (ret) {
- vmw_resource_unreference(&res);
- goto out_unlock;
- }
-
- }
-
tmp = vmw_resource_reference(res);
ret = ttm_prime_object_init(tfile, res->backup_size, &user_srf->prime,
req->base.drm_surface_flags &
return ret;
}
-
-/**
- * vmw_subres_dirty_add - Add a dirty region to a subresource
- * @dirty: The surfaces's dirty tracker.
- * @loc_start: The location corresponding to the start of the region.
- * @loc_end: The location corresponding to the end of the region.
- *
- * As we are assuming that @loc_start and @loc_end represent a sequential
- * range of backing store memory, if the region spans multiple lines then
- * regardless of the x coordinate, the full lines are dirtied.
- * Correspondingly if the region spans multiple z slices, then full rather
- * than partial z slices are dirtied.
- */
-static void vmw_subres_dirty_add(struct vmw_surface_dirty *dirty,
- const struct svga3dsurface_loc *loc_start,
- const struct svga3dsurface_loc *loc_end)
-{
- const struct svga3dsurface_cache *cache = &dirty->cache;
- SVGA3dBox *box = &dirty->boxes[loc_start->sub_resource];
- u32 mip = loc_start->sub_resource % cache->num_mip_levels;
- const struct drm_vmw_size *size = &cache->mip[mip].size;
- u32 box_c2 = box->z + box->d;
-
- if (WARN_ON(loc_start->sub_resource >= dirty->num_subres))
- return;
-
- if (box->d == 0 || box->z > loc_start->z)
- box->z = loc_start->z;
- if (box_c2 < loc_end->z)
- box->d = loc_end->z - box->z;
-
- if (loc_start->z + 1 == loc_end->z) {
- box_c2 = box->y + box->h;
- if (box->h == 0 || box->y > loc_start->y)
- box->y = loc_start->y;
- if (box_c2 < loc_end->y)
- box->h = loc_end->y - box->y;
-
- if (loc_start->y + 1 == loc_end->y) {
- box_c2 = box->x + box->w;
- if (box->w == 0 || box->x > loc_start->x)
- box->x = loc_start->x;
- if (box_c2 < loc_end->x)
- box->w = loc_end->x - box->x;
- } else {
- box->x = 0;
- box->w = size->width;
- }
- } else {
- box->y = 0;
- box->h = size->height;
- box->x = 0;
- box->w = size->width;
- }
-}
-
-/**
- * vmw_subres_dirty_full - Mark a full subresource as dirty
- * @dirty: The surface's dirty tracker.
- * @subres: The subresource
- */
-static void vmw_subres_dirty_full(struct vmw_surface_dirty *dirty, u32 subres)
-{
- const struct svga3dsurface_cache *cache = &dirty->cache;
- u32 mip = subres % cache->num_mip_levels;
- const struct drm_vmw_size *size = &cache->mip[mip].size;
- SVGA3dBox *box = &dirty->boxes[subres];
-
- box->x = 0;
- box->y = 0;
- box->z = 0;
- box->w = size->width;
- box->h = size->height;
- box->d = size->depth;
-}
-
-/*
- * vmw_surface_tex_dirty_add_range - The dirty_add_range callback for texture
- * surfaces.
- */
-static void vmw_surface_tex_dirty_range_add(struct vmw_resource *res,
- size_t start, size_t end)
-{
- struct vmw_surface_dirty *dirty =
- (struct vmw_surface_dirty *) res->dirty;
- size_t backup_end = res->backup_offset + res->backup_size;
- struct svga3dsurface_loc loc1, loc2;
- const struct svga3dsurface_cache *cache;
-
- start = max_t(size_t, start, res->backup_offset) - res->backup_offset;
- end = min(end, backup_end) - res->backup_offset;
- cache = &dirty->cache;
- svga3dsurface_get_loc(cache, &loc1, start);
- svga3dsurface_get_loc(cache, &loc2, end - 1);
- svga3dsurface_inc_loc(cache, &loc2);
-
- if (loc1.sub_resource + 1 == loc2.sub_resource) {
- /* Dirty range covers a single sub-resource */
- vmw_subres_dirty_add(dirty, &loc1, &loc2);
- } else {
- /* Dirty range covers multiple sub-resources */
- struct svga3dsurface_loc loc_min, loc_max;
- u32 sub_res = loc1.sub_resource;
-
- svga3dsurface_max_loc(cache, loc1.sub_resource, &loc_max);
- vmw_subres_dirty_add(dirty, &loc1, &loc_max);
- svga3dsurface_min_loc(cache, loc2.sub_resource - 1, &loc_min);
- vmw_subres_dirty_add(dirty, &loc_min, &loc2);
- for (sub_res = loc1.sub_resource + 1;
- sub_res < loc2.sub_resource - 1; ++sub_res)
- vmw_subres_dirty_full(dirty, sub_res);
- }
-}
-
-/*
- * vmw_surface_tex_dirty_add_range - The dirty_add_range callback for buffer
- * surfaces.
- */
-static void vmw_surface_buf_dirty_range_add(struct vmw_resource *res,
- size_t start, size_t end)
-{
- struct vmw_surface_dirty *dirty =
- (struct vmw_surface_dirty *) res->dirty;
- const struct svga3dsurface_cache *cache = &dirty->cache;
- size_t backup_end = res->backup_offset + cache->mip_chain_bytes;
- SVGA3dBox *box = &dirty->boxes[0];
- u32 box_c2;
-
- box->h = box->d = 1;
- start = max_t(size_t, start, res->backup_offset) - res->backup_offset;
- end = min(end, backup_end) - res->backup_offset;
- box_c2 = box->x + box->w;
- if (box->w == 0 || box->x > start)
- box->x = start;
- if (box_c2 < end)
- box->w = end - box->x;
-}
-
-/*
- * vmw_surface_tex_dirty_add_range - The dirty_add_range callback for surfaces
- */
-static void vmw_surface_dirty_range_add(struct vmw_resource *res, size_t start,
- size_t end)
-{
- struct vmw_surface *srf = vmw_res_to_srf(res);
-
- if (WARN_ON(end <= res->backup_offset ||
- start >= res->backup_offset + res->backup_size))
- return;
-
- if (srf->format == SVGA3D_BUFFER)
- vmw_surface_buf_dirty_range_add(res, start, end);
- else
- vmw_surface_tex_dirty_range_add(res, start, end);
-}
-
-/*
- * vmw_surface_dirty_sync - The surface's dirty_sync callback.
- */
-static int vmw_surface_dirty_sync(struct vmw_resource *res)
-{
- struct vmw_private *dev_priv = res->dev_priv;
- bool has_dx = 0;
- u32 i, num_dirty;
- struct vmw_surface_dirty *dirty =
- (struct vmw_surface_dirty *) res->dirty;
- size_t alloc_size;
- const struct svga3dsurface_cache *cache = &dirty->cache;
- struct {
- SVGA3dCmdHeader header;
- SVGA3dCmdDXUpdateSubResource body;
- } *cmd1;
- struct {
- SVGA3dCmdHeader header;
- SVGA3dCmdUpdateGBImage body;
- } *cmd2;
- void *cmd;
-
- num_dirty = 0;
- for (i = 0; i < dirty->num_subres; ++i) {
- const SVGA3dBox *box = &dirty->boxes[i];
-
- if (box->d)
- num_dirty++;
- }
-
- if (!num_dirty)
- goto out;
-
- alloc_size = num_dirty * ((has_dx) ? sizeof(*cmd1) : sizeof(*cmd2));
- cmd = VMW_FIFO_RESERVE(dev_priv, alloc_size);
- if (!cmd)
- return -ENOMEM;
-
- cmd1 = cmd;
- cmd2 = cmd;
-
- for (i = 0; i < dirty->num_subres; ++i) {
- const SVGA3dBox *box = &dirty->boxes[i];
-
- if (!box->d)
- continue;
-
- /*
- * DX_UPDATE_SUBRESOURCE is aware of array surfaces.
- * UPDATE_GB_IMAGE is not.
- */
- if (has_dx) {
- cmd1->header.id = SVGA_3D_CMD_DX_UPDATE_SUBRESOURCE;
- cmd1->header.size = sizeof(cmd1->body);
- cmd1->body.sid = res->id;
- cmd1->body.subResource = i;
- cmd1->body.box = *box;
- cmd1++;
- } else {
- cmd2->header.id = SVGA_3D_CMD_UPDATE_GB_IMAGE;
- cmd2->header.size = sizeof(cmd2->body);
- cmd2->body.image.sid = res->id;
- cmd2->body.image.face = i / cache->num_mip_levels;
- cmd2->body.image.mipmap = i -
- (cache->num_mip_levels * cmd2->body.image.face);
- cmd2->body.box = *box;
- cmd2++;
- }
-
- }
- vmw_fifo_commit(dev_priv, alloc_size);
- out:
- memset(&dirty->boxes[0], 0, sizeof(dirty->boxes[0]) *
- dirty->num_subres);
-
- return 0;
-}
-
-/*
- * vmw_surface_dirty_alloc - The surface's dirty_alloc callback.
- */
-static int vmw_surface_dirty_alloc(struct vmw_resource *res)
-{
- struct vmw_surface *srf = vmw_res_to_srf(res);
- struct vmw_surface_dirty *dirty;
- u32 num_layers = 1;
- u32 num_mip;
- u32 num_subres;
- u32 num_samples;
- size_t dirty_size, acc_size;
- static struct ttm_operation_ctx ctx = {
- .interruptible = false,
- .no_wait_gpu = false
- };
- int ret;
-
- if (srf->array_size)
- num_layers = srf->array_size;
- else if (srf->flags & SVGA3D_SURFACE_CUBEMAP)
- num_layers *= SVGA3D_MAX_SURFACE_FACES;
-
- num_mip = srf->mip_levels[0];
- if (!num_mip)
- num_mip = 1;
-
- num_subres = num_layers * num_mip;
- dirty_size = sizeof(*dirty) + num_subres * sizeof(dirty->boxes[0]);
- acc_size = ttm_round_pot(dirty_size);
- ret = ttm_mem_global_alloc(vmw_mem_glob(res->dev_priv),
- acc_size, &ctx);
- if (ret) {
- VMW_DEBUG_USER("Out of graphics memory for surface "
- "dirty tracker.\n");
- return ret;
- }
-
- dirty = kvzalloc(dirty_size, GFP_KERNEL);
- if (!dirty) {
- ret = -ENOMEM;
- goto out_no_dirty;
- }
-
- num_samples = max_t(u32, 1, srf->multisample_count);
- ret = svga3dsurface_setup_cache(&srf->base_size, srf->format, num_mip,
- num_layers, num_samples, &dirty->cache);
- if (ret)
- goto out_no_cache;
-
- dirty->num_subres = num_subres;
- dirty->size = acc_size;
- res->dirty = (struct vmw_resource_dirty *) dirty;
-
- return 0;
-
-out_no_cache:
- kvfree(dirty);
-out_no_dirty:
- ttm_mem_global_free(vmw_mem_glob(res->dev_priv), acc_size);
- return ret;
-}
-
-/*
- * vmw_surface_dirty_free - The surface's dirty_free callback
- */
-static void vmw_surface_dirty_free(struct vmw_resource *res)
-{
- struct vmw_surface_dirty *dirty =
- (struct vmw_surface_dirty *) res->dirty;
- size_t acc_size = dirty->size;
-
- kvfree(dirty);
- ttm_mem_global_free(vmw_mem_glob(res->dev_priv), acc_size);
- res->dirty = NULL;
-}
-
-/*
- * vmw_surface_clean - The surface's clean callback
- */
-static int vmw_surface_clean(struct vmw_resource *res)
-{
- struct vmw_private *dev_priv = res->dev_priv;
- size_t alloc_size;
- struct {
- SVGA3dCmdHeader header;
- SVGA3dCmdReadbackGBSurface body;
- } *cmd;
-
- alloc_size = sizeof(*cmd);
- cmd = VMW_FIFO_RESERVE(dev_priv, alloc_size);
- if (!cmd)
- return -ENOMEM;
-
- cmd->header.id = SVGA_3D_CMD_READBACK_GB_SURFACE;
- cmd->header.size = sizeof(cmd->body);
- cmd->body.sid = res->id;
- vmw_fifo_commit(dev_priv, alloc_size);
-
- return 0;
-}
* struct vmw_validation_bo_node - Buffer object validation metadata.
* @base: Metadata used for TTM reservation- and validation.
* @hash: A hash entry used for the duplicate detection hash table.
- * @coherent_count: If switching backup buffers, number of new coherent
- * resources that will have this buffer as a backup buffer.
* @as_mob: Validate as mob.
* @cpu_blit: Validate for cpu blit access.
*
struct vmw_validation_bo_node {
struct ttm_validate_buffer base;
struct drm_hash_item hash;
- unsigned int coherent_count;
u32 as_mob : 1;
u32 cpu_blit : 1;
};
if (ret)
goto out_unreserve;
}
-
- if (val->switching_backup && val->new_backup &&
- res->coherent) {
- struct vmw_validation_bo_node *bo_node =
- vmw_validation_find_bo_dup(ctx,
- val->new_backup);
-
- if (WARN_ON(!bo_node)) {
- ret = -EINVAL;
- goto out_unreserve;
- }
- bo_node->coherent_count++;
- }
}
return 0;
int ret;
list_for_each_entry(entry, &ctx->bo_list, base.head) {
- struct vmw_buffer_object *vbo =
- container_of(entry->base.bo, typeof(*vbo), base);
-
if (entry->cpu_blit) {
struct ttm_operation_ctx ctx = {
.interruptible = intr,
}
if (ret)
return ret;
-
- /*
- * Rather than having the resource code allocating the bo
- * dirty tracker in resource_unreserve() where we can't fail,
- * Do it here when validating the buffer object.
- */
- if (entry->coherent_count) {
- unsigned int coherent_count = entry->coherent_count;
-
- while (coherent_count) {
- ret = vmw_bo_dirty_add(vbo);
- if (ret)
- return ret;
-
- coherent_count--;
- }
- entry->coherent_count -= coherent_count;
- }
-
- if (vbo->dirty)
- vmw_bo_dirty_scan(vbo);
}
return 0;
}
struct vmw_resource *res = val->res;
struct vmw_buffer_object *backup = res->backup;
- ret = vmw_resource_validate(res, intr, val->dirty_set &&
- val->dirty);
+ ret = vmw_resource_validate(res, intr);
if (ret) {
if (ret != -ERESTARTSYS)
DRM_ERROR("Failed to validate resource.\n");
ctx->mem_size_left += size;
return 0;
}
-
-/**
- * vmw_validation_bo_backoff - Unreserve buffer objects registered with a
- * validation context
- * @ctx: The validation context
- *
- * This function unreserves the buffer objects previously reserved using
- * vmw_validation_bo_reserve. It's typically used as part of an error path
- */
-void vmw_validation_bo_backoff(struct vmw_validation_context *ctx)
-{
- struct vmw_validation_bo_node *entry;
-
- /*
- * Switching coherent resource backup buffers failed.
- * Release corresponding buffer object dirty trackers.
- */
- list_for_each_entry(entry, &ctx->bo_list, base.head) {
- if (entry->coherent_count) {
- unsigned int coherent_count = entry->coherent_count;
- struct vmw_buffer_object *vbo =
- container_of(entry->base.bo, typeof(*vbo),
- base);
-
- while (coherent_count--)
- vmw_bo_dirty_release(vbo);
- }
- }
-
- ttm_eu_backoff_reservation(&ctx->ticket, &ctx->bo_list);
-}
NULL, true);
}
+/**
+ * vmw_validation_bo_backoff - Unreserve buffer objects registered with a
+ * validation context
+ * @ctx: The validation context
+ *
+ * This function unreserves the buffer objects previously reserved using
+ * vmw_validation_bo_reserve. It's typically used as part of an error path
+ */
+static inline void
+vmw_validation_bo_backoff(struct vmw_validation_context *ctx)
+{
+ ttm_eu_backoff_reservation(&ctx->ticket, &ctx->bo_list);
+}
+
/**
* vmw_validation_bo_fence - Unreserve and fence buffer objects registered
* with a validation context
unsigned int size);
void vmw_validation_res_set_dirty(struct vmw_validation_context *ctx,
void *val_private, u32 dirty);
-void vmw_validation_bo_backoff(struct vmw_validation_context *ctx);
-
#endif
struct ttm_operation_ctx *ctx);
void ttm_bo_swapout_all(struct ttm_bo_device *bdev);
int ttm_bo_wait_unreserved(struct ttm_buffer_object *bo);
-
-/* Default number of pre-faulted pages in the TTM fault handler */
-#define TTM_BO_VM_NUM_PREFAULT 16
-
-vm_fault_t ttm_bo_vm_reserve(struct ttm_buffer_object *bo,
- struct vm_fault *vmf);
-
-vm_fault_t ttm_bo_vm_fault_reserved(struct vm_fault *vmf,
- pgprot_t prot,
- pgoff_t num_prefault);
#endif
* @driver: Pointer to a struct ttm_bo_driver struct setup by the driver.
* @man: An array of mem_type_managers.
* @vma_manager: Address space manager
- * @vm_ops: Pointer to the struct vm_operations_struct used for this
- * device's VM operations. The driver may override this before the first
- * mmap() call.
* lru_lock: Spinlock that protects the buffer+device lru lists and
* ddestroy lists.
* @dev_mapping: A pointer to the struct address_space representing the
struct ttm_bo_global *glob;
struct ttm_bo_driver *driver;
struct ttm_mem_type_manager man[TTM_NUM_MEM_TYPES];
- const struct vm_operations_struct *vm_ops;
/*
* Protected by internal locks.
bool no_retry;
};
-extern const struct vm_operations_struct ttm_bo_vm_ops;
-
/**
* struct ttm_lru_bulk_move_pos
*
extern int apply_to_page_range(struct mm_struct *mm, unsigned long address,
unsigned long size, pte_fn_t fn, void *data);
-struct pfn_range_apply;
-typedef int (*pter_fn_t)(pte_t *pte, pgtable_t token, unsigned long addr,
- struct pfn_range_apply *closure);
-struct pfn_range_apply {
- struct mm_struct *mm;
- pter_fn_t ptefn;
- unsigned int alloc;
-};
-extern int apply_to_pfn_range(struct pfn_range_apply *closure,
- unsigned long address, unsigned long size);
-unsigned long apply_as_wrprotect(struct address_space *mapping,
- pgoff_t first_index, pgoff_t nr);
-unsigned long apply_as_clean(struct address_space *mapping,
- pgoff_t first_index, pgoff_t nr,
- pgoff_t bitmap_pgoff,
- unsigned long *bitmap,
- pgoff_t *start,
- pgoff_t *end);
+
#ifdef CONFIG_PAGE_POISONING
extern bool page_poisoning_enabled(void);
extern void kernel_poison_pages(struct page *page, int numpages, int enable);
* surface.
* @drm_vmw_surface_flag_create_buffer: Create a backup buffer if none is
* given.
- * @drm_vmw_surface_flag_coherent: Back surface with coherent memory.
*/
enum drm_vmw_surface_flags {
drm_vmw_surface_flag_shareable = (1 << 0),
drm_vmw_surface_flag_scanout = (1 << 1),
- drm_vmw_surface_flag_create_buffer = (1 << 2),
- drm_vmw_surface_flag_coherent = (1 << 3),
+ drm_vmw_surface_flag_create_buffer = (1 << 2)
};
/**
config ARCH_HAS_PTE_SPECIAL
bool
-config AS_DIRTY_HELPERS
- bool
-
endmenu
obj-$(CONFIG_PERCPU_STATS) += percpu-stats.o
obj-$(CONFIG_HMM) += hmm.o
obj-$(CONFIG_MEMFD_CREATE) += memfd.o
-obj-$(CONFIG_AS_DIRTY_HELPERS) += as_dirty_helpers.o
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-#include <linux/mm.h>
-#include <linux/mm_types.h>
-#include <linux/hugetlb.h>
-#include <linux/bitops.h>
-#include <linux/mmu_notifier.h>
-#include <asm/cacheflush.h>
-#include <asm/tlbflush.h>
-
-/**
- * struct apply_as - Closure structure for apply_as_range
- * @base: struct pfn_range_apply we derive from
- * @start: Address of first modified pte
- * @end: Address of last modified pte + 1
- * @total: Total number of modified ptes
- * @vma: Pointer to the struct vm_area_struct we're currently operating on
- */
-struct apply_as {
- struct pfn_range_apply base;
- unsigned long start;
- unsigned long end;
- unsigned long total;
- struct vm_area_struct *vma;
-};
-
-/**
- * apply_pt_wrprotect - Leaf pte callback to write-protect a pte
- * @pte: Pointer to the pte
- * @token: Page table token, see apply_to_pfn_range()
- * @addr: The virtual page address
- * @closure: Pointer to a struct pfn_range_apply embedded in a
- * struct apply_as
- *
- * The function write-protects a pte and records the range in
- * virtual address space of touched ptes for efficient range TLB flushes.
- *
- * Return: Always zero.
- */
-static int apply_pt_wrprotect(pte_t *pte, pgtable_t token,
- unsigned long addr,
- struct pfn_range_apply *closure)
-{
- struct apply_as *aas = container_of(closure, typeof(*aas), base);
- pte_t ptent = *pte;
-
- if (pte_write(ptent)) {
- pte_t old_pte = ptep_modify_prot_start(aas->vma, addr, pte);
-
- ptent = pte_wrprotect(old_pte);
- ptep_modify_prot_commit(aas->vma, addr, pte, old_pte, ptent);
- aas->total++;
- aas->start = min(aas->start, addr);
- aas->end = max(aas->end, addr + PAGE_SIZE);
- }
-
- return 0;
-}
-
-/**
- * struct apply_as_clean - Closure structure for apply_as_clean
- * @base: struct apply_as we derive from
- * @bitmap_pgoff: Address_space Page offset of the first bit in @bitmap
- * @bitmap: Bitmap with one bit for each page offset in the address_space range
- * covered.
- * @start: Address_space page offset of first modified pte relative
- * to @bitmap_pgoff
- * @end: Address_space page offset of last modified pte relative
- * to @bitmap_pgoff
- */
-struct apply_as_clean {
- struct apply_as base;
- pgoff_t bitmap_pgoff;
- unsigned long *bitmap;
- pgoff_t start;
- pgoff_t end;
-};
-
-/**
- * apply_pt_clean - Leaf pte callback to clean a pte
- * @pte: Pointer to the pte
- * @token: Page table token, see apply_to_pfn_range()
- * @addr: The virtual page address
- * @closure: Pointer to a struct pfn_range_apply embedded in a
- * struct apply_as_clean
- *
- * The function cleans a pte and records the range in
- * virtual address space of touched ptes for efficient TLB flushes.
- * It also records dirty ptes in a bitmap representing page offsets
- * in the address_space, as well as the first and last of the bits
- * touched.
- *
- * Return: Always zero.
- */
-static int apply_pt_clean(pte_t *pte, pgtable_t token,
- unsigned long addr,
- struct pfn_range_apply *closure)
-{
- struct apply_as *aas = container_of(closure, typeof(*aas), base);
- struct apply_as_clean *clean = container_of(aas, typeof(*clean), base);
- pte_t ptent = *pte;
-
- if (pte_dirty(ptent)) {
- pgoff_t pgoff = ((addr - aas->vma->vm_start) >> PAGE_SHIFT) +
- aas->vma->vm_pgoff - clean->bitmap_pgoff;
- pte_t old_pte = ptep_modify_prot_start(aas->vma, addr, pte);
-
- ptent = pte_mkclean(old_pte);
- ptep_modify_prot_commit(aas->vma, addr, pte, old_pte, ptent);
-
- aas->total++;
- aas->start = min(aas->start, addr);
- aas->end = max(aas->end, addr + PAGE_SIZE);
-
- __set_bit(pgoff, clean->bitmap);
- clean->start = min(clean->start, pgoff);
- clean->end = max(clean->end, pgoff + 1);
- }
-
- return 0;
-}
-
-/**
- * apply_as_range - Apply a pte callback to all PTEs pointing into a range
- * of an address_space.
- * @mapping: Pointer to the struct address_space
- * @aas: Closure structure
- * @first_index: First page offset in the address_space
- * @nr: Number of incremental page offsets to cover
- *
- * Return: Number of ptes touched. Note that this number might be larger
- * than @nr if there are overlapping vmas
- */
-static unsigned long apply_as_range(struct address_space *mapping,
- struct apply_as *aas,
- pgoff_t first_index, pgoff_t nr)
-{
- struct vm_area_struct *vma;
- pgoff_t vba, vea, cba, cea;
- unsigned long start_addr, end_addr;
- struct mmu_notifier_range range;
-
- i_mmap_lock_read(mapping);
- vma_interval_tree_foreach(vma, &mapping->i_mmap, first_index,
- first_index + nr - 1) {
- unsigned long vm_flags = READ_ONCE(vma->vm_flags);
-
- /*
- * We can only do advisory flag tests below, since we can't
- * require the vm's mmap_sem to be held to protect the flags.
- * Therefore, callers that strictly depend on specific mmap
- * flags to remain constant throughout the operation must
- * either ensure those flags are immutable for all relevant
- * vmas or can't use this function. Fixing this properly would
- * require the vma::vm_flags to be protected by a separate
- * lock taken after the i_mmap_lock
- */
-
- /* Skip non-applicable VMAs */
- if ((vm_flags & (VM_SHARED | VM_WRITE)) !=
- (VM_SHARED | VM_WRITE))
- continue;
-
- /* Warn on and skip VMAs whose flags indicate illegal usage */
- if (WARN_ON((vm_flags & (VM_HUGETLB | VM_IO)) != VM_IO))
- continue;
-
- /* Clip to the vma */
- vba = vma->vm_pgoff;
- vea = vba + vma_pages(vma);
- cba = first_index;
- cba = max(cba, vba);
- cea = first_index + nr;
- cea = min(cea, vea);
-
- /* Translate to virtual address */
- start_addr = ((cba - vba) << PAGE_SHIFT) + vma->vm_start;
- end_addr = ((cea - vba) << PAGE_SHIFT) + vma->vm_start;
- if (start_addr >= end_addr)
- continue;
-
- aas->base.mm = vma->vm_mm;
- aas->vma = vma;
- aas->start = end_addr;
- aas->end = start_addr;
-
- mmu_notifier_range_init(&range, MMU_NOTIFY_PROTECTION_PAGE, 0,
- vma, vma->vm_mm, start_addr, end_addr);
- mmu_notifier_invalidate_range_start(&range);
-
- /* Needed when we only change protection? */
- flush_cache_range(vma, start_addr, end_addr);
-
- /*
- * We're not using tlb_gather_mmu() since typically
- * only a small subrange of PTEs are affected.
- */
- inc_tlb_flush_pending(vma->vm_mm);
-
- /* Should not error since aas->base.alloc == 0 */
- WARN_ON(apply_to_pfn_range(&aas->base, start_addr,
- end_addr - start_addr));
- if (aas->end > aas->start)
- flush_tlb_range(vma, aas->start, aas->end);
-
- mmu_notifier_invalidate_range_end(&range);
- dec_tlb_flush_pending(vma->vm_mm);
- }
- i_mmap_unlock_read(mapping);
-
- return aas->total;
-}
-
-/**
- * apply_as_wrprotect - Write-protect all ptes in an address_space range
- * @mapping: The address_space we want to write protect
- * @first_index: The first page offset in the range
- * @nr: Number of incremental page offsets to cover
- *
- * WARNING: This function should only be used for address spaces whose
- * vmas are marked VM_IO and that do not contain huge pages.
- * To avoid interference with COW'd pages, vmas not marked VM_SHARED are
- * simply skipped.
- *
- * Return: The number of ptes actually write-protected. Note that
- * already write-protected ptes are not counted.
- */
-unsigned long apply_as_wrprotect(struct address_space *mapping,
- pgoff_t first_index, pgoff_t nr)
-{
- struct apply_as aas = {
- .base = {
- .alloc = 0,
- .ptefn = apply_pt_wrprotect,
- },
- .total = 0,
- };
-
- return apply_as_range(mapping, &aas, first_index, nr);
-}
-EXPORT_SYMBOL_GPL(apply_as_wrprotect);
-
-/**
- * apply_as_clean - Clean all ptes in an address_space range
- * @mapping: The address_space we want to clean
- * @first_index: The first page offset in the range
- * @nr: Number of incremental page offsets to cover
- * @bitmap_pgoff: The page offset of the first bit in @bitmap
- * @bitmap: Pointer to a bitmap of at least @nr bits. The bitmap needs to
- * cover the whole range @first_index..@first_index + @nr.
- * @start: Pointer to number of the first set bit in @bitmap.
- * is modified as new bits are set by the function.
- * @end: Pointer to the number of the last set bit in @bitmap.
- * none set. The value is modified as new bits are set by the function.
- *
- * Note: When this function returns there is no guarantee that a CPU has
- * not already dirtied new ptes. However it will not clean any ptes not
- * reported in the bitmap.
- *
- * If a caller needs to make sure all dirty ptes are picked up and none
- * additional are added, it first needs to write-protect the address-space
- * range and make sure new writers are blocked in page_mkwrite() or
- * pfn_mkwrite(). And then after a TLB flush following the write-protection
- * pick up all dirty bits.
- *
- * WARNING: This function should only be used for address spaces whose
- * vmas are marked VM_IO and that do not contain huge pages.
- * To avoid interference with COW'd pages, vmas not marked VM_SHARED are
- * simply skipped.
- *
- * Return: The number of dirty ptes actually cleaned.
- */
-unsigned long apply_as_clean(struct address_space *mapping,
- pgoff_t first_index, pgoff_t nr,
- pgoff_t bitmap_pgoff,
- unsigned long *bitmap,
- pgoff_t *start,
- pgoff_t *end)
-{
- bool none_set = (*start >= *end);
- struct apply_as_clean clean = {
- .base = {
- .base = {
- .alloc = 0,
- .ptefn = apply_pt_clean,
- },
- .total = 0,
- },
- .bitmap_pgoff = bitmap_pgoff,
- .bitmap = bitmap,
- .start = none_set ? nr : *start,
- .end = none_set ? 0 : *end,
- };
- unsigned long ret = apply_as_range(mapping, &clean.base, first_index,
- nr);
-
- *start = clean.start;
- *end = clean.end;
- return ret;
-}
-EXPORT_SYMBOL_GPL(apply_as_clean);
}
EXPORT_SYMBOL(vm_iomap_memory);
-static int apply_to_pte_range(struct pfn_range_apply *closure, pmd_t *pmd,
- unsigned long addr, unsigned long end)
+static int apply_to_pte_range(struct mm_struct *mm, pmd_t *pmd,
+ unsigned long addr, unsigned long end,
+ pte_fn_t fn, void *data)
{
pte_t *pte;
int err;
pgtable_t token;
spinlock_t *uninitialized_var(ptl);
- pte = (closure->mm == &init_mm) ?
+ pte = (mm == &init_mm) ?
pte_alloc_kernel(pmd, addr) :
- pte_alloc_map_lock(closure->mm, pmd, addr, &ptl);
+ pte_alloc_map_lock(mm, pmd, addr, &ptl);
if (!pte)
return -ENOMEM;
token = pmd_pgtable(*pmd);
do {
- err = closure->ptefn(pte++, token, addr, closure);
+ err = fn(pte++, token, addr, data);
if (err)
break;
} while (addr += PAGE_SIZE, addr != end);
arch_leave_lazy_mmu_mode();
- if (closure->mm != &init_mm)
+ if (mm != &init_mm)
pte_unmap_unlock(pte-1, ptl);
return err;
}
-static int apply_to_pmd_range(struct pfn_range_apply *closure, pud_t *pud,
- unsigned long addr, unsigned long end)
+static int apply_to_pmd_range(struct mm_struct *mm, pud_t *pud,
+ unsigned long addr, unsigned long end,
+ pte_fn_t fn, void *data)
{
pmd_t *pmd;
unsigned long next;
- int err = 0;
+ int err;
BUG_ON(pud_huge(*pud));
- pmd = pmd_alloc(closure->mm, pud, addr);
+ pmd = pmd_alloc(mm, pud, addr);
if (!pmd)
return -ENOMEM;
-
do {
next = pmd_addr_end(addr, end);
- if (!closure->alloc && pmd_none_or_clear_bad(pmd))
- continue;
- err = apply_to_pte_range(closure, pmd, addr, next);
+ err = apply_to_pte_range(mm, pmd, addr, next, fn, data);
if (err)
break;
} while (pmd++, addr = next, addr != end);
return err;
}
-static int apply_to_pud_range(struct pfn_range_apply *closure, p4d_t *p4d,
- unsigned long addr, unsigned long end)
+static int apply_to_pud_range(struct mm_struct *mm, p4d_t *p4d,
+ unsigned long addr, unsigned long end,
+ pte_fn_t fn, void *data)
{
pud_t *pud;
unsigned long next;
- int err = 0;
+ int err;
- pud = pud_alloc(closure->mm, p4d, addr);
+ pud = pud_alloc(mm, p4d, addr);
if (!pud)
return -ENOMEM;
-
do {
next = pud_addr_end(addr, end);
- if (!closure->alloc && pud_none_or_clear_bad(pud))
- continue;
- err = apply_to_pmd_range(closure, pud, addr, next);
+ err = apply_to_pmd_range(mm, pud, addr, next, fn, data);
if (err)
break;
} while (pud++, addr = next, addr != end);
return err;
}
-static int apply_to_p4d_range(struct pfn_range_apply *closure, pgd_t *pgd,
- unsigned long addr, unsigned long end)
+static int apply_to_p4d_range(struct mm_struct *mm, pgd_t *pgd,
+ unsigned long addr, unsigned long end,
+ pte_fn_t fn, void *data)
{
p4d_t *p4d;
unsigned long next;
- int err = 0;
+ int err;
- p4d = p4d_alloc(closure->mm, pgd, addr);
+ p4d = p4d_alloc(mm, pgd, addr);
if (!p4d)
return -ENOMEM;
-
do {
next = p4d_addr_end(addr, end);
- if (!closure->alloc && p4d_none_or_clear_bad(p4d))
- continue;
- err = apply_to_pud_range(closure, p4d, addr, next);
+ err = apply_to_pud_range(mm, p4d, addr, next, fn, data);
if (err)
break;
} while (p4d++, addr = next, addr != end);
return err;
}
-/**
- * apply_to_pfn_range - Scan a region of virtual memory, calling a provided
- * function on each leaf page table entry
- * @closure: Details about how to scan and what function to apply
- * @addr: Start virtual address
- * @size: Size of the region
- *
- * If @closure->alloc is set to 1, the function will fill in the page table
- * as necessary. Otherwise it will skip non-present parts.
- * Note: The caller must ensure that the range does not contain huge pages.
- * The caller must also assure that the proper mmu_notifier functions are
- * called before and after the call to apply_to_pfn_range.
- *
- * WARNING: Do not use this function unless you know exactly what you are
- * doing. It is lacking support for huge pages and transparent huge pages.
- *
- * Return: Zero on success. If the provided function returns a non-zero status,
- * the page table walk will terminate and that status will be returned.
- * If @closure->alloc is set to 1, then this function may also return memory
- * allocation errors arising from allocating page table memory.
+/*
+ * Scan a region of virtual memory, filling in page tables as necessary
+ * and calling a provided function on each leaf page table.
*/
-int apply_to_pfn_range(struct pfn_range_apply *closure,
- unsigned long addr, unsigned long size)
+int apply_to_page_range(struct mm_struct *mm, unsigned long addr,
+ unsigned long size, pte_fn_t fn, void *data)
{
pgd_t *pgd;
unsigned long next;
if (WARN_ON(addr >= end))
return -EINVAL;
- pgd = pgd_offset(closure->mm, addr);
+ pgd = pgd_offset(mm, addr);
do {
next = pgd_addr_end(addr, end);
- if (!closure->alloc && pgd_none_or_clear_bad(pgd))
- continue;
- err = apply_to_p4d_range(closure, pgd, addr, next);
+ err = apply_to_p4d_range(mm, pgd, addr, next, fn, data);
if (err)
break;
} while (pgd++, addr = next, addr != end);
return err;
}
-
-/**
- * struct page_range_apply - Closure structure for apply_to_page_range()
- * @pter: The base closure structure we derive from
- * @fn: The leaf pte function to call
- * @data: The leaf pte function closure
- */
-struct page_range_apply {
- struct pfn_range_apply pter;
- pte_fn_t fn;
- void *data;
-};
-
-/*
- * Callback wrapper to enable use of apply_to_pfn_range for
- * the apply_to_page_range interface
- */
-static int apply_to_page_range_wrapper(pte_t *pte, pgtable_t token,
- unsigned long addr,
- struct pfn_range_apply *pter)
-{
- struct page_range_apply *pra =
- container_of(pter, typeof(*pra), pter);
-
- return pra->fn(pte, token, addr, pra->data);
-}
-
-/*
- * Scan a region of virtual memory, filling in page tables as necessary
- * and calling a provided function on each leaf page table.
- *
- * WARNING: Do not use this function unless you know exactly what you are
- * doing. It is lacking support for huge pages and transparent huge pages.
- */
-int apply_to_page_range(struct mm_struct *mm, unsigned long addr,
- unsigned long size, pte_fn_t fn, void *data)
-{
- struct page_range_apply pra = {
- .pter = {.mm = mm,
- .alloc = 1,
- .ptefn = apply_to_page_range_wrapper },
- .fn = fn,
- .data = data
- };
-
- return apply_to_pfn_range(&pra.pter, addr, size);
-}
EXPORT_SYMBOL_GPL(apply_to_page_range);
/*
ret = vmf->vma->vm_ops->page_mkwrite(vmf);
/* Restore original flags so that caller is not surprised */
vmf->flags = old_flags;
- if (unlikely(ret & (VM_FAULT_ERROR | VM_FAULT_NOPAGE | VM_FAULT_RETRY)))
+ if (unlikely(ret & (VM_FAULT_ERROR | VM_FAULT_NOPAGE)))
return ret;
if (unlikely(!(ret & VM_FAULT_LOCKED))) {
lock_page(page);
pte_unmap_unlock(vmf->pte, vmf->ptl);
vmf->flags |= FAULT_FLAG_MKWRITE;
ret = vma->vm_ops->pfn_mkwrite(vmf);
- if (ret & (VM_FAULT_ERROR | VM_FAULT_NOPAGE | VM_FAULT_RETRY))
+ if (ret & (VM_FAULT_ERROR | VM_FAULT_NOPAGE))
return ret;
return finish_mkwrite_fault(vmf);
}
pte_unmap_unlock(vmf->pte, vmf->ptl);
tmp = do_page_mkwrite(vmf);
if (unlikely(!tmp || (tmp &
- (VM_FAULT_ERROR | VM_FAULT_NOPAGE |
- VM_FAULT_RETRY)))) {
+ (VM_FAULT_ERROR | VM_FAULT_NOPAGE)))) {
put_page(vmf->page);
return tmp;
}
unlock_page(vmf->page);
tmp = do_page_mkwrite(vmf);
if (unlikely(!tmp ||
- (tmp & (VM_FAULT_ERROR | VM_FAULT_NOPAGE |
- VM_FAULT_RETRY)))) {
+ (tmp & (VM_FAULT_ERROR | VM_FAULT_NOPAGE)))) {
put_page(vmf->page);
return tmp;
}
git.samba.org / sfrench / cifs-2.6.git / commitdiff