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drm/i915: implement BSD ring buffer V2

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The BSD (bit stream decoder) ring is used for accessing the BSD engine
which decodes video bitstream for H.264 and VC1 on G45+.  It is
asynchronous with the render ring and has access to separate parts of
the GPU from it, though the render cache is coherent between the two.

Signed-off-by: Zou Nan hai <nanhai.zou@intel.com>
Signed-off-by: Xiang Hai hao <haihao.xiang@intel.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Zou Nan hai 2010-05-21 09:08:57 +08:00 committed by Eric Anholt
parent 852835f343
commit d1b851fc0d
6 changed files with 276 additions and 15 deletions
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2
drivers/gpu/drm/i915/i915_dma.c
View file

@ -130,6 +130,8 @@ static int i915_dma_cleanup(struct drm_device * dev)
drm_irq_uninstall(dev);
intel_cleanup_ring_buffer(dev, &dev_priv->render_ring);
if (HAS_BSD(dev))
intel_cleanup_ring_buffer(dev, &dev_priv->bsd_ring);
/* Clear the HWS virtual address at teardown */
if (I915_NEED_GFX_HWS(dev))

2
drivers/gpu/drm/i915/i915_drv.h
View file

@ -235,6 +235,7 @@ typedef struct drm_i915_private {
struct pci_dev *bridge_dev;
struct intel_ring_buffer render_ring;
struct intel_ring_buffer bsd_ring;
drm_dma_handle_t *status_page_dmah;
void *hw_status_page;
@ -1121,6 +1122,7 @@ extern int intel_trans_dp_port_sel (struct drm_crtc *crtc);
(dev)->pci_device == 0x2A42 || \
(dev)->pci_device == 0x2E42)
#define HAS_BSD(dev) (IS_IRONLAKE(dev) || IS_G4X(dev))
#define I915_NEED_GFX_HWS(dev) (INTEL_INFO(dev)->need_gfx_hws)
/* With the 945 and later, Y tiling got adjusted so that it was 32 128-byte

107
drivers/gpu/drm/i915/i915_gem.c
View file

@ -1730,7 +1730,7 @@ i915_seqno_passed(uint32_t seq1, uint32_t seq2)
uint32_t
i915_get_gem_seqno(struct drm_device *dev,
struct intel_ring_buffer *ring)
struct intel_ring_buffer *ring)
{
return ring->get_gem_seqno(dev, ring);
}
@ -1792,8 +1792,13 @@ i915_gem_retire_work_handler(struct work_struct *work)
mutex_lock(&dev->struct_mutex);
i915_gem_retire_requests(dev, &dev_priv->render_ring);
if (HAS_BSD(dev))
i915_gem_retire_requests(dev, &dev_priv->bsd_ring);
if (!dev_priv->mm.suspended &&
(!list_empty(&dev_priv->render_ring.request_list)))
(!list_empty(&dev_priv->render_ring.request_list) ||
(HAS_BSD(dev) &&
!list_empty(&dev_priv->bsd_ring.request_list))))
queue_delayed_work(dev_priv->wq, &dev_priv->mm.retire_work, HZ);
mutex_unlock(&dev->struct_mutex);
}
@ -1883,6 +1888,11 @@ i915_gem_flush(struct drm_device *dev,
dev_priv->render_ring.flush(dev, &dev_priv->render_ring,
invalidate_domains,
flush_domains);
if (HAS_BSD(dev))
dev_priv->bsd_ring.flush(dev, &dev_priv->bsd_ring,
invalidate_domains,
flush_domains);
}
static void
@ -2039,12 +2049,14 @@ i915_gpu_idle(struct drm_device *dev)
{
drm_i915_private_t *dev_priv = dev->dev_private;
bool lists_empty;
uint32_t seqno;
uint32_t seqno1, seqno2;
int ret;
spin_lock(&dev_priv->mm.active_list_lock);
lists_empty = list_empty(&dev_priv->mm.flushing_list) &&
list_empty(&dev_priv->render_ring.active_list);
lists_empty = (list_empty(&dev_priv->mm.flushing_list) &&
list_empty(&dev_priv->render_ring.active_list) &&
(!HAS_BSD(dev) ||
list_empty(&dev_priv->bsd_ring.active_list)));
spin_unlock(&dev_priv->mm.active_list_lock);
if (lists_empty)
@ -2052,11 +2064,23 @@ i915_gpu_idle(struct drm_device *dev)
/* Flush everything onto the inactive list. */
i915_gem_flush(dev, I915_GEM_GPU_DOMAINS, I915_GEM_GPU_DOMAINS);
seqno = i915_add_request(dev, NULL, I915_GEM_GPU_DOMAINS,
seqno1 = i915_add_request(dev, NULL, I915_GEM_GPU_DOMAINS,
&dev_priv->render_ring);
if (seqno == 0)
if (seqno1 == 0)
return -ENOMEM;
ret = i915_wait_request(dev, seqno, &dev_priv->render_ring);
ret = i915_wait_request(dev, seqno1, &dev_priv->render_ring);
if (HAS_BSD(dev)) {
seqno2 = i915_add_request(dev, NULL, I915_GEM_GPU_DOMAINS,
&dev_priv->bsd_ring);
if (seqno2 == 0)
return -ENOMEM;
ret = i915_wait_request(dev, seqno2, &dev_priv->bsd_ring);
if (ret)
return ret;
}
return ret;
}
@ -2071,7 +2095,9 @@ i915_gem_evict_everything(struct drm_device *dev)
spin_lock(&dev_priv->mm.active_list_lock);
lists_empty = (list_empty(&dev_priv->mm.inactive_list) &&
list_empty(&dev_priv->mm.flushing_list) &&
list_empty(&dev_priv->render_ring.active_list));
list_empty(&dev_priv->render_ring.active_list) &&
(!HAS_BSD(dev)
|| list_empty(&dev_priv->bsd_ring.active_list)));
spin_unlock(&dev_priv->mm.active_list_lock);
if (lists_empty)
@ -2091,7 +2117,9 @@ i915_gem_evict_everything(struct drm_device *dev)
spin_lock(&dev_priv->mm.active_list_lock);
lists_empty = (list_empty(&dev_priv->mm.inactive_list) &&
list_empty(&dev_priv->mm.flushing_list) &&
list_empty(&dev_priv->render_ring.active_list));
list_empty(&dev_priv->render_ring.active_list) &&
(!HAS_BSD(dev)
|| list_empty(&dev_priv->bsd_ring.active_list)));
spin_unlock(&dev_priv->mm.active_list_lock);
BUG_ON(!lists_empty);
@ -2106,9 +2134,13 @@ i915_gem_evict_something(struct drm_device *dev, int min_size)
int ret;
struct intel_ring_buffer *render_ring = &dev_priv->render_ring;
struct intel_ring_buffer *bsd_ring = &dev_priv->bsd_ring;
for (;;) {
i915_gem_retire_requests(dev, render_ring);
if (HAS_BSD(dev))
i915_gem_retire_requests(dev, bsd_ring);
/* If there's an inactive buffer available now, grab it
* and be done.
*/
@ -2146,6 +2178,21 @@ i915_gem_evict_something(struct drm_device *dev, int min_size)
continue;
}
if (HAS_BSD(dev) && !list_empty(&bsd_ring->request_list)) {
struct drm_i915_gem_request *request;
request = list_first_entry(&bsd_ring->request_list,
struct drm_i915_gem_request,
list);
ret = i915_wait_request(dev,
request->seqno, request->ring);
if (ret)
return ret;
continue;
}
/* If we didn't have anything on the request list but there
* are buffers awaiting a flush, emit one and try again.
* When we wait on it, those buffers waiting for that flush
@ -3641,6 +3688,16 @@ i915_gem_do_execbuffer(struct drm_device *dev, void *data,
DRM_INFO("buffers_ptr %d buffer_count %d len %08x\n",
(int) args->buffers_ptr, args->buffer_count, args->batch_len);
#endif
if (args->flags & I915_EXEC_BSD) {
if (!HAS_BSD(dev)) {
DRM_ERROR("execbuf with wrong flag\n");
return -EINVAL;
}
ring = &dev_priv->bsd_ring;
} else {
ring = &dev_priv->render_ring;
}
if (args->buffer_count < 1) {
DRM_ERROR("execbuf with %d buffers\n", args->buffer_count);
@ -3694,8 +3751,6 @@ i915_gem_do_execbuffer(struct drm_device *dev, void *data,
goto pre_mutex_err;
}
ring = &dev_priv->render_ring;
/* Look up object handles */
flips = 0;
for (i = 0; i < args->buffer_count; i++) {
@ -3834,6 +3889,10 @@ i915_gem_do_execbuffer(struct drm_device *dev, void *data,
dev->flush_domains,
&dev_priv->render_ring);
if (HAS_BSD(dev))
(void)i915_add_request(dev, file_priv,
dev->flush_domains,
&dev_priv->bsd_ring);
}
}
@ -4267,6 +4326,9 @@ i915_gem_busy_ioctl(struct drm_device *dev, void *data,
*/
i915_gem_retire_requests(dev, &dev_priv->render_ring);
if (HAS_BSD(dev))
i915_gem_retire_requests(dev, &dev_priv->bsd_ring);
obj_priv = to_intel_bo(obj);
/* Don't count being on the flushing list against the object being
* done. Otherwise, a buffer left on the flushing list but not getting
@ -4433,7 +4495,9 @@ i915_gem_idle(struct drm_device *dev)
mutex_lock(&dev->struct_mutex);
if (dev_priv->mm.suspended ||
dev_priv->render_ring.gem_object == NULL) {
(dev_priv->render_ring.gem_object == NULL) ||
(HAS_BSD(dev) &&
dev_priv->bsd_ring.gem_object == NULL)) {
mutex_unlock(&dev->struct_mutex);
return 0;
}
@ -4550,6 +4614,10 @@ i915_gem_init_ringbuffer(struct drm_device *dev)
return ret;
}
ret = intel_init_ring_buffer(dev, &dev_priv->render_ring);
if (!ret && HAS_BSD(dev)) {
dev_priv->bsd_ring = bsd_ring;
ret = intel_init_ring_buffer(dev, &dev_priv->bsd_ring);
}
return ret;
}
@ -4559,6 +4627,8 @@ i915_gem_cleanup_ringbuffer(struct drm_device *dev)
drm_i915_private_t *dev_priv = dev->dev_private;
intel_cleanup_ring_buffer(dev, &dev_priv->render_ring);
if (HAS_BSD(dev))
intel_cleanup_ring_buffer(dev, &dev_priv->bsd_ring);
if (HAS_PIPE_CONTROL(dev))
i915_gem_cleanup_pipe_control(dev);
}
@ -4589,11 +4659,13 @@ i915_gem_entervt_ioctl(struct drm_device *dev, void *data,
spin_lock(&dev_priv->mm.active_list_lock);
BUG_ON(!list_empty(&dev_priv->render_ring.active_list));
BUG_ON(HAS_BSD(dev) && !list_empty(&dev_priv->bsd_ring.active_list));
spin_unlock(&dev_priv->mm.active_list_lock);
BUG_ON(!list_empty(&dev_priv->mm.flushing_list));
BUG_ON(!list_empty(&dev_priv->mm.inactive_list));
BUG_ON(!list_empty(&dev_priv->render_ring.request_list));
BUG_ON(HAS_BSD(dev) && !list_empty(&dev_priv->bsd_ring.request_list));
mutex_unlock(&dev->struct_mutex);
drm_irq_install(dev);
@ -4638,6 +4710,10 @@ i915_gem_load(struct drm_device *dev)
INIT_LIST_HEAD(&dev_priv->mm.fence_list);
INIT_LIST_HEAD(&dev_priv->render_ring.active_list);
INIT_LIST_HEAD(&dev_priv->render_ring.request_list);
if (HAS_BSD(dev)) {
INIT_LIST_HEAD(&dev_priv->bsd_ring.active_list);
INIT_LIST_HEAD(&dev_priv->bsd_ring.request_list);
}
for (i = 0; i < 16; i++)
INIT_LIST_HEAD(&dev_priv->fence_regs[i].lru_list);
INIT_DELAYED_WORK(&dev_priv->mm.retire_work,
@ -4874,6 +4950,8 @@ i915_gpu_is_active(struct drm_device *dev)
spin_lock(&dev_priv->mm.active_list_lock);
lists_empty = list_empty(&dev_priv->mm.flushing_list) &&
list_empty(&dev_priv->render_ring.active_list);
if (HAS_BSD(dev))
lists_empty &= list_empty(&dev_priv->bsd_ring.active_list);
spin_unlock(&dev_priv->mm.active_list_lock);
return !lists_empty;
@ -4920,6 +4998,9 @@ rescan:
spin_unlock(&shrink_list_lock);
i915_gem_retire_requests(dev, &dev_priv->render_ring);
if (HAS_BSD(dev))
i915_gem_retire_requests(dev, &dev_priv->bsd_ring);
list_for_each_entry_safe(obj_priv, next_obj,
&dev_priv->mm.inactive_list,
list) {

13
drivers/gpu/drm/i915/i915_irq.c
View file

@ -53,7 +53,7 @@
I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
/** Interrupts that we mask and unmask at runtime. */
#define I915_INTERRUPT_ENABLE_VAR (I915_USER_INTERRUPT)
#define I915_INTERRUPT_ENABLE_VAR (I915_USER_INTERRUPT | I915_BSD_USER_INTERRUPT)
#define I915_PIPE_VBLANK_STATUS (PIPE_START_VBLANK_INTERRUPT_STATUS |\
PIPE_VBLANK_INTERRUPT_STATUS)
@ -362,6 +362,9 @@ irqreturn_t ironlake_irq_handler(struct drm_device *dev)
dev_priv->hangcheck_count = 0;
mod_timer(&dev_priv->hangcheck_timer, jiffies + DRM_I915_HANGCHECK_PERIOD);
}
if (gt_iir & GT_BSD_USER_INTERRUPT)
DRM_WAKEUP(&dev_priv->bsd_ring.irq_queue);
if (de_iir & DE_GSE)
ironlake_opregion_gse_intr(dev);
@ -944,6 +947,9 @@ irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS)
mod_timer(&dev_priv->hangcheck_timer, jiffies + DRM_I915_HANGCHECK_PERIOD);
}
if (HAS_BSD(dev) && (iir & I915_BSD_USER_INTERRUPT))
DRM_WAKEUP(&dev_priv->bsd_ring.irq_queue);
if (iir & I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT)
intel_prepare_page_flip(dev, 0);
@ -1297,7 +1303,7 @@ static int ironlake_irq_postinstall(struct drm_device *dev)
/* enable kind of interrupts always enabled */
u32 display_mask = DE_MASTER_IRQ_CONTROL | DE_GSE | DE_PCH_EVENT |
DE_PLANEA_FLIP_DONE | DE_PLANEB_FLIP_DONE;
u32 render_mask = GT_PIPE_NOTIFY;
u32 render_mask = GT_PIPE_NOTIFY | GT_BSD_USER_INTERRUPT;
u32 hotplug_mask = SDE_CRT_HOTPLUG | SDE_PORTB_HOTPLUG |
SDE_PORTC_HOTPLUG | SDE_PORTD_HOTPLUG;
@ -1376,6 +1382,9 @@ int i915_driver_irq_postinstall(struct drm_device *dev)
DRM_INIT_WAITQUEUE(&dev_priv->render_ring.irq_queue);
if (HAS_BSD(dev))
DRM_INIT_WAITQUEUE(&dev_priv->bsd_ring.irq_queue);
dev_priv->vblank_pipe = DRM_I915_VBLANK_PIPE_A | DRM_I915_VBLANK_PIPE_B;
if (HAS_PCH_SPLIT(dev))

14
drivers/gpu/drm/i915/i915_reg.h
View file

@ -334,6 +334,7 @@
#define I915_DEBUG_INTERRUPT (1<<2)
#define I915_USER_INTERRUPT (1<<1)
#define I915_ASLE_INTERRUPT (1<<0)
#define I915_BSD_USER_INTERRUPT (1<<25)
#define EIR 0x020b0
#define EMR 0x020b4
#define ESR 0x020b8
@ -368,6 +369,17 @@
#define BB_ADDR 0x02140 /* 8 bytes */
#define GFX_FLSH_CNTL 0x02170 /* 915+ only */
/*
* BSD (bit stream decoder instruction and interrupt control register defines
* (G4X and Ironlake only)
*/
#define BSD_RING_TAIL 0x04030
#define BSD_RING_HEAD 0x04034
#define BSD_RING_START 0x04038
#define BSD_RING_CTL 0x0403c
#define BSD_RING_ACTHD 0x04074
#define BSD_HWS_PGA 0x04080
/*
* Framebuffer compression (915+ only)
@ -2355,6 +2367,8 @@
#define GT_PIPE_NOTIFY (1 << 4)
#define GT_SYNC_STATUS (1 << 2)
#define GT_USER_INTERRUPT (1 << 0)
#define GT_BSD_USER_INTERRUPT (1 << 5)
#define GTISR 0x44010
#define GTIMR 0x44014

153
drivers/gpu/drm/i915/intel_ringbuffer.c
View file

@ -340,6 +340,119 @@ static void render_setup_status_page(struct drm_device *dev,
}
void
bsd_ring_flush(struct drm_device *dev,
struct intel_ring_buffer *ring,
u32 invalidate_domains,
u32 flush_domains)
{
intel_ring_begin(dev, ring, 8);
intel_ring_emit(dev, ring, MI_FLUSH);
intel_ring_emit(dev, ring, MI_NOOP);
intel_ring_advance(dev, ring);
}
static inline unsigned int bsd_ring_get_head(struct drm_device *dev,
struct intel_ring_buffer *ring)
{
drm_i915_private_t *dev_priv = dev->dev_private;
return I915_READ(BSD_RING_HEAD) & HEAD_ADDR;
}
static inline unsigned int bsd_ring_get_tail(struct drm_device *dev,
struct intel_ring_buffer *ring)
{
drm_i915_private_t *dev_priv = dev->dev_private;
return I915_READ(BSD_RING_TAIL) & TAIL_ADDR;
}
static inline unsigned int bsd_ring_get_active_head(struct drm_device *dev,
struct intel_ring_buffer *ring)
{
drm_i915_private_t *dev_priv = dev->dev_private;
return I915_READ(BSD_RING_ACTHD);
}
static inline void bsd_ring_advance_ring(struct drm_device *dev,
struct intel_ring_buffer *ring)
{
drm_i915_private_t *dev_priv = dev->dev_private;
I915_WRITE(BSD_RING_TAIL, ring->tail);
}
static int init_bsd_ring(struct drm_device *dev,
struct intel_ring_buffer *ring)
{
return init_ring_common(dev, ring);
}
static u32
bsd_ring_add_request(struct drm_device *dev,
struct intel_ring_buffer *ring,
struct drm_file *file_priv,
u32 flush_domains)
{
u32 seqno;
seqno = intel_ring_get_seqno(dev, ring);
intel_ring_begin(dev, ring, 4);
intel_ring_emit(dev, ring, MI_STORE_DWORD_INDEX);
intel_ring_emit(dev, ring,
I915_GEM_HWS_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
intel_ring_emit(dev, ring, seqno);
intel_ring_emit(dev, ring, MI_USER_INTERRUPT);
intel_ring_advance(dev, ring);
DRM_DEBUG_DRIVER("%s %d\n", ring->name, seqno);
return seqno;
}
static void bsd_setup_status_page(struct drm_device *dev,
struct intel_ring_buffer *ring)
{
drm_i915_private_t *dev_priv = dev->dev_private;
I915_WRITE(BSD_HWS_PGA, ring->status_page.gfx_addr);
I915_READ(BSD_HWS_PGA);
}
static void
bsd_ring_get_user_irq(struct drm_device *dev,
struct intel_ring_buffer *ring)
{
/* do nothing */
}
static void
bsd_ring_put_user_irq(struct drm_device *dev,
struct intel_ring_buffer *ring)
{
/* do nothing */
}
static u32
bsd_ring_get_gem_seqno(struct drm_device *dev,
struct intel_ring_buffer *ring)
{
return intel_read_status_page(ring, I915_GEM_HWS_INDEX);
}
static int
bsd_ring_dispatch_gem_execbuffer(struct drm_device *dev,
struct intel_ring_buffer *ring,
struct drm_i915_gem_execbuffer2 *exec,
struct drm_clip_rect *cliprects,
uint64_t exec_offset)
{
uint32_t exec_start;
exec_start = (uint32_t) exec_offset + exec->batch_start_offset;
intel_ring_begin(dev, ring, 2);
intel_ring_emit(dev, ring, MI_BATCH_BUFFER_START |
(2 << 6) | MI_BATCH_NON_SECURE_I965);
intel_ring_emit(dev, ring, exec_start);
intel_ring_advance(dev, ring);
return 0;
}
static int
render_ring_dispatch_gem_execbuffer(struct drm_device *dev,
struct intel_ring_buffer *ring,
@ -588,6 +701,7 @@ int intel_wait_ring_buffer(struct drm_device *dev,
if (master_priv->sarea_priv)
master_priv->sarea_priv->perf_boxes |= I915_BOX_WAIT;
}
yield();
} while (!time_after(jiffies, end));
trace_i915_ring_wait_end (dev);
@ -682,3 +796,42 @@ struct intel_ring_buffer render_ring = {
.status_page = {NULL, 0, NULL},
.map = {0,}
};
/* ring buffer for bit-stream decoder */
struct intel_ring_buffer bsd_ring = {
.name = "bsd ring",
.regs = {
.ctl = BSD_RING_CTL,
.head = BSD_RING_HEAD,
.tail = BSD_RING_TAIL,
.start = BSD_RING_START
},
.ring_flag = I915_EXEC_BSD,
.size = 32 * PAGE_SIZE,
.alignment = PAGE_SIZE,
.virtual_start = NULL,
.dev = NULL,
.gem_object = NULL,
.head = 0,
.tail = 0,
.space = 0,
.next_seqno = 1,
.user_irq_refcount = 0,
.irq_gem_seqno = 0,
.waiting_gem_seqno = 0,
.setup_status_page = bsd_setup_status_page,
.init = init_bsd_ring,
.get_head = bsd_ring_get_head,
.get_tail = bsd_ring_get_tail,
.get_active_head = bsd_ring_get_active_head,
.advance_ring = bsd_ring_advance_ring,
.flush = bsd_ring_flush,
.add_request = bsd_ring_add_request,
.get_gem_seqno = bsd_ring_get_gem_seqno,
.user_irq_get = bsd_ring_get_user_irq,
.user_irq_put = bsd_ring_put_user_irq,
.dispatch_gem_execbuffer = bsd_ring_dispatch_gem_execbuffer,
.status_page = {NULL, 0, NULL},
.map = {0,}
};