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[gem] Manage the ringbuffer from the kernel in the GEM case. 

This requires that the X Server use the execbuf interface for buffer
submission, as it no longer has direct access to the ring.  This is
therefore a flag day for the gem interface.

This also adds enter/leavevt ioctls for use by the X Server.  These would
get stubbed out in a modesetting implementation, but are required while
in an environment where the device's state is only managed by the DRM while
X has the VT.
main
Eric Anholt 2008-06-10 15:30:23 -07:00
parent 500c81d194
commit 2150da5d1a
7 changed files with 274 additions and 38 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
linux-core/drmP.h
View File

@ -1371,6 +1371,9 @@ drm_gem_init (struct drm_device *dev);
void
drm_gem_object_free (struct kref *kref);
struct drm_gem_object *
drm_gem_object_alloc(struct drm_device *dev, size_t size);
void
drm_gem_object_handle_free (struct kref *kref);

3
linux-core/drm_gem.c
View File

@ -80,7 +80,7 @@ drm_gem_init(struct drm_device *dev)
/**
* Allocate a GEM object of the specified size with shmfs backing store
*/
static struct drm_gem_object *
struct drm_gem_object *
drm_gem_object_alloc(struct drm_device *dev, size_t size)
{
struct drm_gem_object *obj;
@ -117,6 +117,7 @@ drm_gem_object_alloc(struct drm_device *dev, size_t size)
atomic_inc(&dev->object_count);
return obj;
}
EXPORT_SYMBOL(drm_gem_object_alloc);
/**
* Removes the mapping from handle to filp for this object.

242
linux-core/i915_gem.c
View File

@ -702,14 +702,17 @@ i915_gem_object_get_page_list(struct drm_gem_object *obj)
BUG_ON(obj_priv->page_list != NULL);
obj_priv->page_list = drm_calloc(page_count, sizeof(struct page *),
DRM_MEM_DRIVER);
if (obj_priv->page_list == NULL)
if (obj_priv->page_list == NULL) {
DRM_ERROR("Faled to allocate page list\n");
return -ENOMEM;
}
for (i = 0; i < page_count; i++) {
obj_priv->page_list[i] =
find_or_create_page(obj->filp->f_mapping, i, GFP_HIGHUSER);
if (obj_priv->page_list[i] == NULL) {
DRM_ERROR("Failed to find_or_create_page()\n");
i915_gem_object_free_page_list(obj);
return -ENOMEM;
}
@ -758,14 +761,17 @@ i915_gem_object_bind_to_gtt(struct drm_gem_object *obj, unsigned alignment)
DRM_INFO("%s: GTT full, evicting something\n", __func__);
#endif
if (list_empty(&dev_priv->mm.inactive_list) &&
list_empty(&dev_priv->mm.flushing_list) &&
list_empty(&dev_priv->mm.active_list)) {
DRM_ERROR("GTT full, but LRU list empty\n");
return -ENOMEM;
}
ret = i915_gem_evict_something(dev);
if (ret != 0)
if (ret != 0) {
DRM_ERROR("Failed to evict a buffer\n");
return ret;
}
goto search_free;
}
@ -1383,6 +1389,7 @@ int
i915_gem_execbuffer(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
drm_i915_private_t *dev_priv = dev->dev_private;
struct drm_i915_gem_execbuffer *args = data;
struct drm_i915_gem_exec_object *exec_list = NULL;
struct drm_gem_object **object_list = NULL;
@ -1423,6 +1430,12 @@ i915_gem_execbuffer(struct drm_device *dev, void *data,
mutex_lock(&dev->struct_mutex);
if (dev_priv->mm.suspended) {
DRM_ERROR("Execbuf while VT-switched.\n");
mutex_unlock(&dev->struct_mutex);
return -EBUSY;
}
/* Zero the gloabl flush/invalidate flags. These
* will be modified as each object is bound to the
* gtt
@ -1559,6 +1572,37 @@ pre_mutex_err:
return ret;
}
int
i915_gem_object_pin(struct drm_gem_object *obj, uint32_t alignment)
{
struct drm_device *dev = obj->dev;
struct drm_i915_gem_object *obj_priv = obj->driver_private;
int ret;
if (obj_priv->gtt_space == NULL) {
ret = i915_gem_object_bind_to_gtt(obj, alignment);
if (ret != 0) {
DRM_ERROR("Failure to bind in "
"i915_gem_pin_ioctl(): %d\n",
ret);
drm_gem_object_unreference(obj);
mutex_unlock(&dev->struct_mutex);
return ret;
}
}
obj_priv->pin_count++;
return 0;
}
void
i915_gem_object_unpin(struct drm_gem_object *obj)
{
struct drm_i915_gem_object *obj_priv = obj->driver_private;
obj_priv->pin_count--;
}
int
i915_gem_pin_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
@ -1578,22 +1622,15 @@ i915_gem_pin_ioctl(struct drm_device *dev, void *data,
mutex_unlock(&dev->struct_mutex);
return -EINVAL;
}
obj_priv = obj->driver_private;
if (obj_priv->gtt_space == NULL) {
ret = i915_gem_object_bind_to_gtt(obj,
(unsigned) args->alignment);
if (ret != 0) {
DRM_ERROR("Failure to bind in "
"i915_gem_pin_ioctl(): %d\n",
ret);
drm_gem_object_unreference(obj);
mutex_unlock(&dev->struct_mutex);
return ret;
}
ret = i915_gem_object_pin(obj, args->alignment);
if (ret != 0) {
drm_gem_object_unreference(obj);
mutex_unlock(&dev->struct_mutex);
return ret;
}
obj_priv->pin_count++;
args->offset = obj_priv->gtt_offset;
drm_gem_object_unreference(obj);
mutex_unlock(&dev->struct_mutex);
@ -1607,7 +1644,6 @@ i915_gem_unpin_ioctl(struct drm_device *dev, void *data,
{
struct drm_i915_gem_pin *args = data;
struct drm_gem_object *obj;
struct drm_i915_gem_object *obj_priv;
mutex_lock(&dev->struct_mutex);
@ -1620,8 +1656,8 @@ i915_gem_unpin_ioctl(struct drm_device *dev, void *data,
return -EINVAL;
}
obj_priv = obj->driver_private;
obj_priv->pin_count--;
i915_gem_object_unpin(obj);
drm_gem_object_unreference(obj);
mutex_unlock(&dev->struct_mutex);
return 0;
@ -1757,3 +1793,173 @@ i915_gem_lastclose(struct drm_device *dev)
mutex_unlock(&dev->struct_mutex);
}
static int
i915_gem_init_ringbuffer(struct drm_device *dev)
{
drm_i915_private_t *dev_priv = dev->dev_private;
struct drm_gem_object *obj;
struct drm_i915_gem_object *obj_priv;
int ret;
obj = drm_gem_object_alloc(dev, 128 * 1024);
if (obj == NULL) {
DRM_ERROR("Failed to allocate ringbuffer\n");
return -ENOMEM;
}
obj_priv = obj->driver_private;
ret = i915_gem_object_pin(obj, 4096);
if (ret != 0)
return ret;
/* Set up the kernel mapping for the ring. */
dev_priv->ring.Size = obj->size;
dev_priv->ring.tail_mask = obj->size - 1;
dev_priv->ring.map.offset = dev->agp->base + obj_priv->gtt_offset;
dev_priv->ring.map.size = obj->size;
dev_priv->ring.map.type = 0;
dev_priv->ring.map.flags = 0;
dev_priv->ring.map.mtrr = 0;
drm_core_ioremap(&dev_priv->ring.map, dev);
if (dev_priv->ring.map.handle == NULL) {
DRM_ERROR("Failed to map ringbuffer.\n");
memset(&dev_priv->ring, 0, sizeof(dev_priv->ring));
drm_gem_object_unreference(obj);
return -EINVAL;
}
dev_priv->ring.ring_obj = obj;
dev_priv->ring.virtual_start = dev_priv->ring.map.handle;
/* Stop the ring if it's running. */
I915_WRITE(LP_RING + RING_LEN, 0);
I915_WRITE(LP_RING + RING_HEAD, 0);
I915_WRITE(LP_RING + RING_TAIL, 0);
I915_WRITE(LP_RING + RING_START, 0);
/* Initialize the ring. */
I915_WRITE(LP_RING + RING_START, obj_priv->gtt_offset);
I915_WRITE(LP_RING + RING_LEN,
((obj->size - 4096) & RING_NR_PAGES) |
RING_NO_REPORT |
RING_VALID);
/* Update our cache of the ring state */
i915_kernel_lost_context(dev);
return 0;
}
static void
i915_gem_cleanup_ringbuffer(struct drm_device *dev)
{
drm_i915_private_t *dev_priv = dev->dev_private;
if (dev_priv->ring.ring_obj == NULL)
return;
drm_core_ioremapfree(&dev_priv->ring.map, dev);
i915_gem_object_unpin(dev_priv->ring.ring_obj);
drm_gem_object_unreference(dev_priv->ring.ring_obj);
memset(&dev_priv->ring, 0, sizeof(dev_priv->ring));
}
int
i915_gem_entervt_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
drm_i915_private_t *dev_priv = dev->dev_private;
int ret;
ret = i915_gem_init_ringbuffer(dev);
if (ret != 0)
return ret;
mutex_lock(&dev->struct_mutex);
dev_priv->mm.suspended = 0;
mutex_unlock(&dev->struct_mutex);
return 0;
}
/** Unbinds all objects that are on the given buffer list. */
static int
i915_gem_evict_from_list(struct drm_device *dev, struct list_head *head)
{
struct drm_gem_object *obj;
struct drm_i915_gem_object *obj_priv;
int ret;
while (!list_empty(head)) {
obj_priv = list_first_entry(head,
struct drm_i915_gem_object,
list);
obj = obj_priv->obj;
if (obj_priv->pin_count != 0) {
DRM_ERROR("Pinned object in unbind list\n");
mutex_unlock(&dev->struct_mutex);
return -EINVAL;
}
ret = i915_gem_object_unbind(obj);
if (ret != 0) {
DRM_ERROR("Error unbinding object in LeaveVT: %d\n",
ret);
mutex_unlock(&dev->struct_mutex);
return ret;
}
}
return 0;
}
int
i915_gem_leavevt_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
drm_i915_private_t *dev_priv = dev->dev_private;
mutex_lock(&dev->struct_mutex);
/* Hack! Don't let anybody do execbuf while we don't control the chip.
* We need to replace this with a semaphore, or something.
*/
dev_priv->mm.suspended = 1;
/* Move all buffers out of the GTT. */
i915_gem_evict_from_list(dev, &dev_priv->mm.active_list);
i915_gem_evict_from_list(dev, &dev_priv->mm.flushing_list);
i915_gem_evict_from_list(dev, &dev_priv->mm.inactive_list);
/* Make sure the harware's idle. */
while (!list_empty(&dev_priv->mm.request_list)) {
struct drm_i915_gem_request *request;
int ret;
request = list_first_entry(&dev_priv->mm.request_list,
struct drm_i915_gem_request,
list);
ret = i915_wait_request(dev, request->seqno);
if (ret != 0) {
DRM_ERROR("Error waiting for idle at LeaveVT: %d\n",
ret);
mutex_unlock(&dev->struct_mutex);
return ret;
}
}
BUG_ON(!list_empty(&dev_priv->mm.active_list));
BUG_ON(!list_empty(&dev_priv->mm.flushing_list));
BUG_ON(!list_empty(&dev_priv->mm.inactive_list));
i915_gem_cleanup_ringbuffer(dev);
mutex_unlock(&dev->struct_mutex);
return 0;
}

36
shared-core/i915_dma.c
View File

@ -255,28 +255,28 @@ static int i915_initialize(struct drm_device * dev,
dev_priv->sarea_priv = NULL;
}
dev_priv->ring.Start = init->ring_start;
dev_priv->ring.End = init->ring_end;
dev_priv->ring.Size = init->ring_size;
dev_priv->ring.tail_mask = dev_priv->ring.Size - 1;
if (init->ring_size != 0) {
dev_priv->ring.Size = init->ring_size;
dev_priv->ring.tail_mask = dev_priv->ring.Size - 1;
dev_priv->ring.map.offset = init->ring_start;
dev_priv->ring.map.size = init->ring_size;
dev_priv->ring.map.type = 0;
dev_priv->ring.map.flags = 0;
dev_priv->ring.map.mtrr = 0;
dev_priv->ring.map.offset = init->ring_start;
dev_priv->ring.map.size = init->ring_size;
dev_priv->ring.map.type = 0;
dev_priv->ring.map.flags = 0;
dev_priv->ring.map.mtrr = 0;
drm_core_ioremap(&dev_priv->ring.map, dev);
drm_core_ioremap(&dev_priv->ring.map, dev);
if (dev_priv->ring.map.handle == NULL) {
i915_dma_cleanup(dev);
DRM_ERROR("can not ioremap virtual address for"
" ring buffer\n");
return -ENOMEM;
if (dev_priv->ring.map.handle == NULL) {
i915_dma_cleanup(dev);
DRM_ERROR("can not ioremap virtual address for"
" ring buffer\n");
return -ENOMEM;
}
dev_priv->ring.virtual_start = dev_priv->ring.map.handle;
}
dev_priv->ring.virtual_start = dev_priv->ring.map.handle;
dev_priv->cpp = init->cpp;
if (dev_priv->sarea_priv)
@ -1188,6 +1188,8 @@ struct drm_ioctl_desc i915_ioctls[] = {
DRM_IOCTL_DEF(DRM_I915_GEM_UNPIN, i915_gem_unpin_ioctl, DRM_AUTH|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_I915_GEM_BUSY, i915_gem_busy_ioctl, DRM_AUTH),
DRM_IOCTL_DEF(DRM_I915_GEM_THROTTLE, i915_gem_throttle_ioctl, DRM_AUTH),
DRM_IOCTL_DEF(DRM_I915_GEM_ENTERVT, i915_gem_entervt_ioctl, DRM_AUTH),
DRM_IOCTL_DEF(DRM_I915_GEM_LEAVEVT, i915_gem_leavevt_ioctl, DRM_AUTH),
};
int i915_max_ioctl = DRM_ARRAY_SIZE(i915_ioctls);

4
shared-core/i915_drm.h
View File

@ -182,6 +182,8 @@ typedef struct drm_i915_sarea {
#define DRM_I915_GEM_UNPIN 0x16
#define DRM_I915_GEM_BUSY 0x17
#define DRM_I915_GEM_THROTTLE 0x18
#define DRM_I915_GEM_ENTERVT 0x19
#define DRM_I915_GEM_LEAVEVT 0x20
#define DRM_IOCTL_I915_INIT DRM_IOW( DRM_COMMAND_BASE + DRM_I915_INIT, drm_i915_init_t)
#define DRM_IOCTL_I915_FLUSH DRM_IO ( DRM_COMMAND_BASE + DRM_I915_FLUSH)
@ -207,6 +209,8 @@ typedef struct drm_i915_sarea {
#define DRM_IOCTL_I915_GEM_UNPIN DRM_IOW(DRM_COMMAND_BASE + DRM_I915_GEM_UNPIN, struct drm_i915_gem_unpin)
#define DRM_IOCTL_I915_GEM_BUSY DRM_IOWR(DRM_COMMAND_BASE + DRM_I915_GEM_BUSY, struct drm_i915_gem_busy)
#define DRM_IOCTL_I915_GEM_THROTTLE DRM_IO ( DRM_COMMAND_BASE + DRM_I915_GEM_THROTTLE)
#define DRM_IOCTL_I915_GEM_ENTERVT DRM_IO(DRM_COMMAND_BASE + DRM_I915_GEM_ENTERVT)
#define DRM_IOCTL_I915_GEM_LEAVEVT DRM_IO(DRM_COMMAND_BASE + DRM_I915_GEM_LEAVEVT)
/* Asynchronous page flipping:
*/

19
shared-core/i915_drv.h
View File

@ -74,14 +74,13 @@ struct drm_i915_validate_buffer;
typedef struct _drm_i915_ring_buffer {
int tail_mask;
unsigned long Start;
unsigned long End;
unsigned long Size;
u8 *virtual_start;
int head;
int tail;
int space;
drm_local_map_t map;
struct drm_gem_object *ring_obj;
} drm_i915_ring_buffer_t;
struct mem_block {
@ -290,6 +289,16 @@ typedef struct drm_i915_private {
struct work_struct retire_task;
uint32_t next_gem_seqno;
/**
* Flag if the X Server, and thus DRM, is not currently in
* control of the device.
*
* This is set between LeaveVT and EnterVT. It needs to be
* replaced with a semaphore. It also needs to be
* transitioned away from for kernel modesetting.
*/
int suspended;
} mm;
struct work_struct user_interrupt_task;
@ -462,8 +471,14 @@ int i915_gem_busy_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv);
int i915_gem_throttle_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv);
int i915_gem_entervt_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv);
int i915_gem_leavevt_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv);
int i915_gem_init_object(struct drm_gem_object *obj);
void i915_gem_free_object(struct drm_gem_object *obj);
int i915_gem_object_pin(struct drm_gem_object *obj, uint32_t alignment);
void i915_gem_object_unpin(struct drm_gem_object *obj);
int i915_gem_set_domain(struct drm_gem_object *obj,
struct drm_file *file_priv,
uint32_t read_domains,

5
shared-core/i915_irq.c
View File

@ -575,6 +575,11 @@ int i915_wait_irq(struct drm_device * dev, int irq_nr)
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
int ret = 0;
if (!dev_priv) {
DRM_ERROR("called with no initialization\n");
return -EINVAL;
}
DRM_DEBUG("irq_nr=%d breadcrumb=%d\n", irq_nr,
READ_BREADCRUMB(dev_priv));