linux/drivers/gpu/drm/i915/intel_ringbuffer.c

871 lines
22 KiB
C

/*
* Copyright © 2008-2010 Intel Corporation
*
* 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, sublicense,
* 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 NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS 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.
*
* Authors:
* Eric Anholt <eric@anholt.net>
* Zou Nan hai <nanhai.zou@intel.com>
* Xiang Hai hao<haihao.xiang@intel.com>
*
*/
#include "drmP.h"
#include "drm.h"
#include "i915_drv.h"
#include "i915_drm.h"
#include "i915_trace.h"
static u32 i915_gem_get_seqno(struct drm_device *dev)
{
drm_i915_private_t *dev_priv = dev->dev_private;
u32 seqno;
seqno = dev_priv->next_seqno;
/* reserve 0 for non-seqno */
if (++dev_priv->next_seqno == 0)
dev_priv->next_seqno = 1;
return seqno;
}
static void
render_ring_flush(struct drm_device *dev,
struct intel_ring_buffer *ring,
u32 invalidate_domains,
u32 flush_domains)
{
drm_i915_private_t *dev_priv = dev->dev_private;
u32 cmd;
#if WATCH_EXEC
DRM_INFO("%s: invalidate %08x flush %08x\n", __func__,
invalidate_domains, flush_domains);
#endif
trace_i915_gem_request_flush(dev, dev_priv->next_seqno,
invalidate_domains, flush_domains);
if ((invalidate_domains | flush_domains) & I915_GEM_GPU_DOMAINS) {
/*
* read/write caches:
*
* I915_GEM_DOMAIN_RENDER is always invalidated, but is
* only flushed if MI_NO_WRITE_FLUSH is unset. On 965, it is
* also flushed at 2d versus 3d pipeline switches.
*
* read-only caches:
*
* I915_GEM_DOMAIN_SAMPLER is flushed on pre-965 if
* MI_READ_FLUSH is set, and is always flushed on 965.
*
* I915_GEM_DOMAIN_COMMAND may not exist?
*
* I915_GEM_DOMAIN_INSTRUCTION, which exists on 965, is
* invalidated when MI_EXE_FLUSH is set.
*
* I915_GEM_DOMAIN_VERTEX, which exists on 965, is
* invalidated with every MI_FLUSH.
*
* TLBs:
*
* On 965, TLBs associated with I915_GEM_DOMAIN_COMMAND
* and I915_GEM_DOMAIN_CPU in are invalidated at PTE write and
* I915_GEM_DOMAIN_RENDER and I915_GEM_DOMAIN_SAMPLER
* are flushed at any MI_FLUSH.
*/
cmd = MI_FLUSH | MI_NO_WRITE_FLUSH;
if ((invalidate_domains|flush_domains) &
I915_GEM_DOMAIN_RENDER)
cmd &= ~MI_NO_WRITE_FLUSH;
if (!IS_I965G(dev)) {
/*
* On the 965, the sampler cache always gets flushed
* and this bit is reserved.
*/
if (invalidate_domains & I915_GEM_DOMAIN_SAMPLER)
cmd |= MI_READ_FLUSH;
}
if (invalidate_domains & I915_GEM_DOMAIN_INSTRUCTION)
cmd |= MI_EXE_FLUSH;
#if WATCH_EXEC
DRM_INFO("%s: queue flush %08x to ring\n", __func__, cmd);
#endif
intel_ring_begin(dev, ring, 2);
intel_ring_emit(dev, ring, cmd);
intel_ring_emit(dev, ring, MI_NOOP);
intel_ring_advance(dev, ring);
}
i915_gem_process_flushing_list(dev, flush_domains, ring);
}
static unsigned int render_ring_get_head(struct drm_device *dev,
struct intel_ring_buffer *ring)
{
drm_i915_private_t *dev_priv = dev->dev_private;
return I915_READ(PRB0_HEAD) & HEAD_ADDR;
}
static unsigned int render_ring_get_tail(struct drm_device *dev,
struct intel_ring_buffer *ring)
{
drm_i915_private_t *dev_priv = dev->dev_private;
return I915_READ(PRB0_TAIL) & TAIL_ADDR;
}
static unsigned int render_ring_get_active_head(struct drm_device *dev,
struct intel_ring_buffer *ring)
{
drm_i915_private_t *dev_priv = dev->dev_private;
u32 acthd_reg = IS_I965G(dev) ? ACTHD_I965 : ACTHD;
return I915_READ(acthd_reg);
}
static void render_ring_advance_ring(struct drm_device *dev,
struct intel_ring_buffer *ring)
{
drm_i915_private_t *dev_priv = dev->dev_private;
I915_WRITE(PRB0_TAIL, ring->tail);
}
static int init_ring_common(struct drm_device *dev,
struct intel_ring_buffer *ring)
{
u32 head;
drm_i915_private_t *dev_priv = dev->dev_private;
struct drm_i915_gem_object *obj_priv;
obj_priv = to_intel_bo(ring->gem_object);
/* Stop the ring if it's running. */
I915_WRITE(ring->regs.ctl, 0);
I915_WRITE(ring->regs.head, 0);
I915_WRITE(ring->regs.tail, 0);
/* Initialize the ring. */
I915_WRITE(ring->regs.start, obj_priv->gtt_offset);
head = ring->get_head(dev, ring);
/* G45 ring initialization fails to reset head to zero */
if (head != 0) {
DRM_ERROR("%s head not reset to zero "
"ctl %08x head %08x tail %08x start %08x\n",
ring->name,
I915_READ(ring->regs.ctl),
I915_READ(ring->regs.head),
I915_READ(ring->regs.tail),
I915_READ(ring->regs.start));
I915_WRITE(ring->regs.head, 0);
DRM_ERROR("%s head forced to zero "
"ctl %08x head %08x tail %08x start %08x\n",
ring->name,
I915_READ(ring->regs.ctl),
I915_READ(ring->regs.head),
I915_READ(ring->regs.tail),
I915_READ(ring->regs.start));
}
I915_WRITE(ring->regs.ctl,
((ring->gem_object->size - PAGE_SIZE) & RING_NR_PAGES)
| RING_NO_REPORT | RING_VALID);
head = I915_READ(ring->regs.head) & HEAD_ADDR;
/* If the head is still not zero, the ring is dead */
if (head != 0) {
DRM_ERROR("%s initialization failed "
"ctl %08x head %08x tail %08x start %08x\n",
ring->name,
I915_READ(ring->regs.ctl),
I915_READ(ring->regs.head),
I915_READ(ring->regs.tail),
I915_READ(ring->regs.start));
return -EIO;
}
if (!drm_core_check_feature(dev, DRIVER_MODESET))
i915_kernel_lost_context(dev);
else {
ring->head = ring->get_head(dev, ring);
ring->tail = ring->get_tail(dev, ring);
ring->space = ring->head - (ring->tail + 8);
if (ring->space < 0)
ring->space += ring->size;
}
return 0;
}
static int init_render_ring(struct drm_device *dev,
struct intel_ring_buffer *ring)
{
drm_i915_private_t *dev_priv = dev->dev_private;
int ret = init_ring_common(dev, ring);
int mode;
if (IS_I9XX(dev) && !IS_GEN3(dev)) {
mode = VS_TIMER_DISPATCH << 16 | VS_TIMER_DISPATCH;
if (IS_GEN6(dev))
mode |= MI_FLUSH_ENABLE << 16 | MI_FLUSH_ENABLE;
I915_WRITE(MI_MODE, mode);
}
return ret;
}
#define PIPE_CONTROL_FLUSH(addr) \
do { \
OUT_RING(GFX_OP_PIPE_CONTROL | PIPE_CONTROL_QW_WRITE | \
PIPE_CONTROL_DEPTH_STALL | 2); \
OUT_RING(addr | PIPE_CONTROL_GLOBAL_GTT); \
OUT_RING(0); \
OUT_RING(0); \
} while (0)
/**
* Creates a new sequence number, emitting a write of it to the status page
* plus an interrupt, which will trigger i915_user_interrupt_handler.
*
* Must be called with struct_lock held.
*
* Returned sequence numbers are nonzero on success.
*/
static u32
render_ring_add_request(struct drm_device *dev,
struct intel_ring_buffer *ring,
struct drm_file *file_priv,
u32 flush_domains)
{
drm_i915_private_t *dev_priv = dev->dev_private;
u32 seqno;
seqno = i915_gem_get_seqno(dev);
if (IS_GEN6(dev)) {
BEGIN_LP_RING(6);
OUT_RING(GFX_OP_PIPE_CONTROL | 3);
OUT_RING(PIPE_CONTROL_QW_WRITE |
PIPE_CONTROL_WC_FLUSH | PIPE_CONTROL_IS_FLUSH |
PIPE_CONTROL_NOTIFY);
OUT_RING(dev_priv->seqno_gfx_addr | PIPE_CONTROL_GLOBAL_GTT);
OUT_RING(seqno);
OUT_RING(0);
OUT_RING(0);
ADVANCE_LP_RING();
} else if (HAS_PIPE_CONTROL(dev)) {
u32 scratch_addr = dev_priv->seqno_gfx_addr + 128;
/*
* Workaround qword write incoherence by flushing the
* PIPE_NOTIFY buffers out to memory before requesting
* an interrupt.
*/
BEGIN_LP_RING(32);
OUT_RING(GFX_OP_PIPE_CONTROL | PIPE_CONTROL_QW_WRITE |
PIPE_CONTROL_WC_FLUSH | PIPE_CONTROL_TC_FLUSH);
OUT_RING(dev_priv->seqno_gfx_addr | PIPE_CONTROL_GLOBAL_GTT);
OUT_RING(seqno);
OUT_RING(0);
PIPE_CONTROL_FLUSH(scratch_addr);
scratch_addr += 128; /* write to separate cachelines */
PIPE_CONTROL_FLUSH(scratch_addr);
scratch_addr += 128;
PIPE_CONTROL_FLUSH(scratch_addr);
scratch_addr += 128;
PIPE_CONTROL_FLUSH(scratch_addr);
scratch_addr += 128;
PIPE_CONTROL_FLUSH(scratch_addr);
scratch_addr += 128;
PIPE_CONTROL_FLUSH(scratch_addr);
OUT_RING(GFX_OP_PIPE_CONTROL | PIPE_CONTROL_QW_WRITE |
PIPE_CONTROL_WC_FLUSH | PIPE_CONTROL_TC_FLUSH |
PIPE_CONTROL_NOTIFY);
OUT_RING(dev_priv->seqno_gfx_addr | PIPE_CONTROL_GLOBAL_GTT);
OUT_RING(seqno);
OUT_RING(0);
ADVANCE_LP_RING();
} else {
BEGIN_LP_RING(4);
OUT_RING(MI_STORE_DWORD_INDEX);
OUT_RING(I915_GEM_HWS_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
OUT_RING(seqno);
OUT_RING(MI_USER_INTERRUPT);
ADVANCE_LP_RING();
}
return seqno;
}
static u32
render_ring_get_gem_seqno(struct drm_device *dev,
struct intel_ring_buffer *ring)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
if (HAS_PIPE_CONTROL(dev))
return ((volatile u32 *)(dev_priv->seqno_page))[0];
else
return intel_read_status_page(ring, I915_GEM_HWS_INDEX);
}
static void
render_ring_get_user_irq(struct drm_device *dev,
struct intel_ring_buffer *ring)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
unsigned long irqflags;
spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags);
if (dev->irq_enabled && (++ring->user_irq_refcount == 1)) {
if (HAS_PCH_SPLIT(dev))
ironlake_enable_graphics_irq(dev_priv, GT_PIPE_NOTIFY);
else
i915_enable_irq(dev_priv, I915_USER_INTERRUPT);
}
spin_unlock_irqrestore(&dev_priv->user_irq_lock, irqflags);
}
static void
render_ring_put_user_irq(struct drm_device *dev,
struct intel_ring_buffer *ring)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
unsigned long irqflags;
spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags);
BUG_ON(dev->irq_enabled && ring->user_irq_refcount <= 0);
if (dev->irq_enabled && (--ring->user_irq_refcount == 0)) {
if (HAS_PCH_SPLIT(dev))
ironlake_disable_graphics_irq(dev_priv, GT_PIPE_NOTIFY);
else
i915_disable_irq(dev_priv, I915_USER_INTERRUPT);
}
spin_unlock_irqrestore(&dev_priv->user_irq_lock, irqflags);
}
static void render_setup_status_page(struct drm_device *dev,
struct intel_ring_buffer *ring)
{
drm_i915_private_t *dev_priv = dev->dev_private;
if (IS_GEN6(dev)) {
I915_WRITE(HWS_PGA_GEN6, ring->status_page.gfx_addr);
I915_READ(HWS_PGA_GEN6); /* posting read */
} else {
I915_WRITE(HWS_PGA, ring->status_page.gfx_addr);
I915_READ(HWS_PGA); /* posting read */
}
}
void
bsd_ring_flush(struct drm_device *dev,
struct intel_ring_buffer *ring,
u32 invalidate_domains,
u32 flush_domains)
{
intel_ring_begin(dev, ring, 2);
intel_ring_emit(dev, ring, MI_FLUSH);
intel_ring_emit(dev, ring, MI_NOOP);
intel_ring_advance(dev, ring);
i915_gem_process_flushing_list(dev, flush_domains, 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 = i915_gem_get_seqno(dev);
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,
struct drm_i915_gem_execbuffer2 *exec,
struct drm_clip_rect *cliprects,
uint64_t exec_offset)
{
drm_i915_private_t *dev_priv = dev->dev_private;
int nbox = exec->num_cliprects;
int i = 0, count;
uint32_t exec_start, exec_len;
exec_start = (uint32_t) exec_offset + exec->batch_start_offset;
exec_len = (uint32_t) exec->batch_len;
trace_i915_gem_request_submit(dev, dev_priv->next_seqno + 1);
count = nbox ? nbox : 1;
for (i = 0; i < count; i++) {
if (i < nbox) {
int ret = i915_emit_box(dev, cliprects, i,
exec->DR1, exec->DR4);
if (ret)
return ret;
}
if (IS_I830(dev) || IS_845G(dev)) {
intel_ring_begin(dev, ring, 4);
intel_ring_emit(dev, ring, MI_BATCH_BUFFER);
intel_ring_emit(dev, ring,
exec_start | MI_BATCH_NON_SECURE);
intel_ring_emit(dev, ring, exec_start + exec_len - 4);
intel_ring_emit(dev, ring, 0);
} else {
intel_ring_begin(dev, ring, 4);
if (IS_I965G(dev)) {
intel_ring_emit(dev, ring,
MI_BATCH_BUFFER_START | (2 << 6)
| MI_BATCH_NON_SECURE_I965);
intel_ring_emit(dev, ring, exec_start);
} else {
intel_ring_emit(dev, ring, MI_BATCH_BUFFER_START
| (2 << 6));
intel_ring_emit(dev, ring, exec_start |
MI_BATCH_NON_SECURE);
}
}
intel_ring_advance(dev, ring);
}
if (IS_G4X(dev) || IS_IRONLAKE(dev)) {
intel_ring_begin(dev, ring, 2);
intel_ring_emit(dev, ring, MI_FLUSH |
MI_NO_WRITE_FLUSH |
MI_INVALIDATE_ISP );
intel_ring_emit(dev, ring, MI_NOOP);
intel_ring_advance(dev, ring);
}
/* XXX breadcrumb */
return 0;
}
static void cleanup_status_page(struct drm_device *dev,
struct intel_ring_buffer *ring)
{
drm_i915_private_t *dev_priv = dev->dev_private;
struct drm_gem_object *obj;
struct drm_i915_gem_object *obj_priv;
obj = ring->status_page.obj;
if (obj == NULL)
return;
obj_priv = to_intel_bo(obj);
kunmap(obj_priv->pages[0]);
i915_gem_object_unpin(obj);
drm_gem_object_unreference(obj);
ring->status_page.obj = NULL;
memset(&dev_priv->hws_map, 0, sizeof(dev_priv->hws_map));
}
static int init_status_page(struct drm_device *dev,
struct intel_ring_buffer *ring)
{
drm_i915_private_t *dev_priv = dev->dev_private;
struct drm_gem_object *obj;
struct drm_i915_gem_object *obj_priv;
int ret;
obj = i915_gem_alloc_object(dev, 4096);
if (obj == NULL) {
DRM_ERROR("Failed to allocate status page\n");
ret = -ENOMEM;
goto err;
}
obj_priv = to_intel_bo(obj);
obj_priv->agp_type = AGP_USER_CACHED_MEMORY;
ret = i915_gem_object_pin(obj, 4096);
if (ret != 0) {
goto err_unref;
}
ring->status_page.gfx_addr = obj_priv->gtt_offset;
ring->status_page.page_addr = kmap(obj_priv->pages[0]);
if (ring->status_page.page_addr == NULL) {
memset(&dev_priv->hws_map, 0, sizeof(dev_priv->hws_map));
goto err_unpin;
}
ring->status_page.obj = obj;
memset(ring->status_page.page_addr, 0, PAGE_SIZE);
ring->setup_status_page(dev, ring);
DRM_DEBUG_DRIVER("%s hws offset: 0x%08x\n",
ring->name, ring->status_page.gfx_addr);
return 0;
err_unpin:
i915_gem_object_unpin(obj);
err_unref:
drm_gem_object_unreference(obj);
err:
return ret;
}
int intel_init_ring_buffer(struct drm_device *dev,
struct intel_ring_buffer *ring)
{
struct drm_i915_gem_object *obj_priv;
struct drm_gem_object *obj;
int ret;
ring->dev = dev;
if (I915_NEED_GFX_HWS(dev)) {
ret = init_status_page(dev, ring);
if (ret)
return ret;
}
obj = i915_gem_alloc_object(dev, ring->size);
if (obj == NULL) {
DRM_ERROR("Failed to allocate ringbuffer\n");
ret = -ENOMEM;
goto err_hws;
}
ring->gem_object = obj;
ret = i915_gem_object_pin(obj, ring->alignment);
if (ret)
goto err_unref;
obj_priv = to_intel_bo(obj);
ring->map.size = ring->size;
ring->map.offset = dev->agp->base + obj_priv->gtt_offset;
ring->map.type = 0;
ring->map.flags = 0;
ring->map.mtrr = 0;
drm_core_ioremap_wc(&ring->map, dev);
if (ring->map.handle == NULL) {
DRM_ERROR("Failed to map ringbuffer.\n");
ret = -EINVAL;
goto err_unpin;
}
ring->virtual_start = ring->map.handle;
ret = ring->init(dev, ring);
if (ret)
goto err_unmap;
if (!drm_core_check_feature(dev, DRIVER_MODESET))
i915_kernel_lost_context(dev);
else {
ring->head = ring->get_head(dev, ring);
ring->tail = ring->get_tail(dev, ring);
ring->space = ring->head - (ring->tail + 8);
if (ring->space < 0)
ring->space += ring->size;
}
INIT_LIST_HEAD(&ring->active_list);
INIT_LIST_HEAD(&ring->request_list);
return ret;
err_unmap:
drm_core_ioremapfree(&ring->map, dev);
err_unpin:
i915_gem_object_unpin(obj);
err_unref:
drm_gem_object_unreference(obj);
ring->gem_object = NULL;
err_hws:
cleanup_status_page(dev, ring);
return ret;
}
void intel_cleanup_ring_buffer(struct drm_device *dev,
struct intel_ring_buffer *ring)
{
if (ring->gem_object == NULL)
return;
drm_core_ioremapfree(&ring->map, dev);
i915_gem_object_unpin(ring->gem_object);
drm_gem_object_unreference(ring->gem_object);
ring->gem_object = NULL;
cleanup_status_page(dev, ring);
}
int intel_wrap_ring_buffer(struct drm_device *dev,
struct intel_ring_buffer *ring)
{
unsigned int *virt;
int rem;
rem = ring->size - ring->tail;
if (ring->space < rem) {
int ret = intel_wait_ring_buffer(dev, ring, rem);
if (ret)
return ret;
}
virt = (unsigned int *)(ring->virtual_start + ring->tail);
rem /= 8;
while (rem--) {
*virt++ = MI_NOOP;
*virt++ = MI_NOOP;
}
ring->tail = 0;
ring->space = ring->head - 8;
return 0;
}
int intel_wait_ring_buffer(struct drm_device *dev,
struct intel_ring_buffer *ring, int n)
{
unsigned long end;
trace_i915_ring_wait_begin (dev);
end = jiffies + 3 * HZ;
do {
ring->head = ring->get_head(dev, ring);
ring->space = ring->head - (ring->tail + 8);
if (ring->space < 0)
ring->space += ring->size;
if (ring->space >= n) {
trace_i915_ring_wait_end (dev);
return 0;
}
if (dev->primary->master) {
struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
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);
return -EBUSY;
}
void intel_ring_begin(struct drm_device *dev,
struct intel_ring_buffer *ring, int num_dwords)
{
int n = 4*num_dwords;
if (unlikely(ring->tail + n > ring->size))
intel_wrap_ring_buffer(dev, ring);
if (unlikely(ring->space < n))
intel_wait_ring_buffer(dev, ring, n);
ring->space -= n;
}
void intel_ring_advance(struct drm_device *dev,
struct intel_ring_buffer *ring)
{
ring->tail &= ring->size - 1;
ring->advance_ring(dev, ring);
}
void intel_fill_struct(struct drm_device *dev,
struct intel_ring_buffer *ring,
void *data,
unsigned int len)
{
unsigned int *virt = ring->virtual_start + ring->tail;
BUG_ON((len&~(4-1)) != 0);
intel_ring_begin(dev, ring, len/4);
memcpy(virt, data, len);
ring->tail += len;
ring->tail &= ring->size - 1;
ring->space -= len;
intel_ring_advance(dev, ring);
}
struct intel_ring_buffer render_ring = {
.name = "render ring",
.regs = {
.ctl = PRB0_CTL,
.head = PRB0_HEAD,
.tail = PRB0_TAIL,
.start = PRB0_START
},
.size = 32 * PAGE_SIZE,
.alignment = PAGE_SIZE,
.virtual_start = NULL,
.dev = NULL,
.gem_object = NULL,
.head = 0,
.tail = 0,
.space = 0,
.user_irq_refcount = 0,
.irq_gem_seqno = 0,
.waiting_gem_seqno = 0,
.setup_status_page = render_setup_status_page,
.init = init_render_ring,
.get_head = render_ring_get_head,
.get_tail = render_ring_get_tail,
.get_active_head = render_ring_get_active_head,
.advance_ring = render_ring_advance_ring,
.flush = render_ring_flush,
.add_request = render_ring_add_request,
.get_gem_seqno = render_ring_get_gem_seqno,
.user_irq_get = render_ring_get_user_irq,
.user_irq_put = render_ring_put_user_irq,
.dispatch_gem_execbuffer = render_ring_dispatch_gem_execbuffer,
.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
},
.size = 32 * PAGE_SIZE,
.alignment = PAGE_SIZE,
.virtual_start = NULL,
.dev = NULL,
.gem_object = NULL,
.head = 0,
.tail = 0,
.space = 0,
.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,}
};