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Regard whitespace Rev 2331 → Rev 2332

/drivers/video/drm/i915/intel_ringbuffer.c
0,0 → 1,1375
/*
* 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>
*
*/
#define iowrite32(v, addr) writel((v), (addr))
#define ioread32(addr) readl(addr)
 
#include "drmP.h"
#include "drm.h"
#include "i915_drv.h"
#include "i915_drm.h"
//#include "i915_trace.h"
#include "intel_drv.h"
 
static inline int ring_space(struct intel_ring_buffer *ring)
{
int space = (ring->head & HEAD_ADDR) - (ring->tail + 8);
if (space < 0)
space += ring->size;
return space;
}
 
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 int
render_ring_flush(struct intel_ring_buffer *ring,
u32 invalidate_domains,
u32 flush_domains)
{
struct drm_device *dev = ring->dev;
u32 cmd;
int ret;
 
/*
* 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 (INTEL_INFO(dev)->gen < 4) {
/*
* 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 (invalidate_domains & I915_GEM_DOMAIN_COMMAND &&
(IS_G4X(dev) || IS_GEN5(dev)))
cmd |= MI_INVALIDATE_ISP;
 
ret = intel_ring_begin(ring, 2);
if (ret)
return ret;
 
intel_ring_emit(ring, cmd);
intel_ring_emit(ring, MI_NOOP);
intel_ring_advance(ring);
 
return 0;
}
 
static void ring_write_tail(struct intel_ring_buffer *ring,
u32 value)
{
drm_i915_private_t *dev_priv = ring->dev->dev_private;
I915_WRITE_TAIL(ring, value);
}
 
u32 intel_ring_get_active_head(struct intel_ring_buffer *ring)
{
drm_i915_private_t *dev_priv = ring->dev->dev_private;
u32 acthd_reg = INTEL_INFO(ring->dev)->gen >= 4 ?
RING_ACTHD(ring->mmio_base) : ACTHD;
 
return I915_READ(acthd_reg);
}
 
 
static int init_ring_common(struct intel_ring_buffer *ring)
{
drm_i915_private_t *dev_priv = ring->dev->dev_private;
struct drm_i915_gem_object *obj = ring->obj;
u32 head;
 
ENTER();
 
/* Stop the ring if it's running. */
I915_WRITE_CTL(ring, 0);
I915_WRITE_HEAD(ring, 0);
ring->write_tail(ring, 0);
 
/* Initialize the ring. */
I915_WRITE_START(ring, obj->gtt_offset);
head = I915_READ_HEAD(ring) & HEAD_ADDR;
 
/* G45 ring initialization fails to reset head to zero */
if (head != 0) {
DRM_DEBUG_KMS("%s head not reset to zero "
"ctl %08x head %08x tail %08x start %08x\n",
ring->name,
I915_READ_CTL(ring),
I915_READ_HEAD(ring),
I915_READ_TAIL(ring),
I915_READ_START(ring));
 
I915_WRITE_HEAD(ring, 0);
 
if (I915_READ_HEAD(ring) & HEAD_ADDR) {
DRM_ERROR("failed to set %s head to zero "
"ctl %08x head %08x tail %08x start %08x\n",
ring->name,
I915_READ_CTL(ring),
I915_READ_HEAD(ring),
I915_READ_TAIL(ring),
I915_READ_START(ring));
}
}
 
I915_WRITE_CTL(ring,
((ring->size - PAGE_SIZE) & RING_NR_PAGES)
| RING_REPORT_64K | RING_VALID);
 
/* If the head is still not zero, the ring is dead */
if ((I915_READ_CTL(ring) & RING_VALID) == 0 ||
I915_READ_START(ring) != obj->gtt_offset ||
(I915_READ_HEAD(ring) & HEAD_ADDR) != 0) {
DRM_ERROR("%s initialization failed "
"ctl %08x head %08x tail %08x start %08x\n",
ring->name,
I915_READ_CTL(ring),
I915_READ_HEAD(ring),
I915_READ_TAIL(ring),
I915_READ_START(ring));
return -EIO;
}
 
ring->head = I915_READ_HEAD(ring);
ring->tail = I915_READ_TAIL(ring) & TAIL_ADDR;
ring->space = ring_space(ring);
 
LEAVE();
 
return 0;
}
 
#if 0
 
/*
* 965+ support PIPE_CONTROL commands, which provide finer grained control
* over cache flushing.
*/
struct pipe_control {
struct drm_i915_gem_object *obj;
volatile u32 *cpu_page;
u32 gtt_offset;
};
 
static int
init_pipe_control(struct intel_ring_buffer *ring)
{
struct pipe_control *pc;
struct drm_i915_gem_object *obj;
int ret;
 
if (ring->private)
return 0;
 
pc = kmalloc(sizeof(*pc), GFP_KERNEL);
if (!pc)
return -ENOMEM;
 
obj = i915_gem_alloc_object(ring->dev, 4096);
if (obj == NULL) {
DRM_ERROR("Failed to allocate seqno page\n");
ret = -ENOMEM;
goto err;
}
 
i915_gem_object_set_cache_level(obj, I915_CACHE_LLC);
 
ret = i915_gem_object_pin(obj, 4096, true);
if (ret)
goto err_unref;
 
pc->gtt_offset = obj->gtt_offset;
pc->cpu_page = kmap(obj->pages[0]);
if (pc->cpu_page == NULL)
goto err_unpin;
 
pc->obj = obj;
ring->private = pc;
return 0;
 
err_unpin:
i915_gem_object_unpin(obj);
err_unref:
drm_gem_object_unreference(&obj->base);
err:
kfree(pc);
return ret;
}
 
static void
cleanup_pipe_control(struct intel_ring_buffer *ring)
{
struct pipe_control *pc = ring->private;
struct drm_i915_gem_object *obj;
 
if (!ring->private)
return;
 
obj = pc->obj;
kunmap(obj->pages[0]);
i915_gem_object_unpin(obj);
drm_gem_object_unreference(&obj->base);
 
kfree(pc);
ring->private = NULL;
}
 
#endif
 
static int init_render_ring(struct intel_ring_buffer *ring)
{
struct drm_device *dev = ring->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
 
ENTER();
 
int ret = init_ring_common(ring);
 
 
if (INTEL_INFO(dev)->gen > 3) {
int mode = VS_TIMER_DISPATCH << 16 | VS_TIMER_DISPATCH;
if (IS_GEN6(dev) || IS_GEN7(dev))
mode |= MI_FLUSH_ENABLE << 16 | MI_FLUSH_ENABLE;
I915_WRITE(MI_MODE, mode);
if (IS_GEN7(dev))
I915_WRITE(GFX_MODE_GEN7,
GFX_MODE_DISABLE(GFX_TLB_INVALIDATE_ALWAYS) |
GFX_MODE_ENABLE(GFX_REPLAY_MODE));
}
 
if (INTEL_INFO(dev)->gen >= 6) {
} else if (IS_GEN5(dev)) {
// ret = init_pipe_control(ring);
if (ret)
return ret;
}
 
LEAVE();
 
return ret;
}
 
#if 0
 
static void render_ring_cleanup(struct intel_ring_buffer *ring)
{
if (!ring->private)
return;
 
cleanup_pipe_control(ring);
}
 
static void
update_semaphore(struct intel_ring_buffer *ring, int i, u32 seqno)
{
struct drm_device *dev = ring->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
int id;
 
/*
* cs -> 1 = vcs, 0 = bcs
* vcs -> 1 = bcs, 0 = cs,
* bcs -> 1 = cs, 0 = vcs.
*/
id = ring - dev_priv->ring;
id += 2 - i;
id %= 3;
 
intel_ring_emit(ring,
MI_SEMAPHORE_MBOX |
MI_SEMAPHORE_REGISTER |
MI_SEMAPHORE_UPDATE);
intel_ring_emit(ring, seqno);
intel_ring_emit(ring,
RING_SYNC_0(dev_priv->ring[id].mmio_base) + 4*i);
}
 
static int
gen6_add_request(struct intel_ring_buffer *ring,
u32 *result)
{
u32 seqno;
int ret;
 
ret = intel_ring_begin(ring, 10);
if (ret)
return ret;
 
seqno = i915_gem_get_seqno(ring->dev);
update_semaphore(ring, 0, seqno);
update_semaphore(ring, 1, seqno);
 
intel_ring_emit(ring, MI_STORE_DWORD_INDEX);
intel_ring_emit(ring, I915_GEM_HWS_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
intel_ring_emit(ring, seqno);
intel_ring_emit(ring, MI_USER_INTERRUPT);
intel_ring_advance(ring);
 
*result = seqno;
return 0;
}
 
int
intel_ring_sync(struct intel_ring_buffer *ring,
struct intel_ring_buffer *to,
u32 seqno)
{
int ret;
 
ret = intel_ring_begin(ring, 4);
if (ret)
return ret;
 
intel_ring_emit(ring,
MI_SEMAPHORE_MBOX |
MI_SEMAPHORE_REGISTER |
intel_ring_sync_index(ring, to) << 17 |
MI_SEMAPHORE_COMPARE);
intel_ring_emit(ring, seqno);
intel_ring_emit(ring, 0);
intel_ring_emit(ring, MI_NOOP);
intel_ring_advance(ring);
 
return 0;
}
 
#define PIPE_CONTROL_FLUSH(ring__, addr__) \
do { \
intel_ring_emit(ring__, GFX_OP_PIPE_CONTROL | PIPE_CONTROL_QW_WRITE | \
PIPE_CONTROL_DEPTH_STALL | 2); \
intel_ring_emit(ring__, (addr__) | PIPE_CONTROL_GLOBAL_GTT); \
intel_ring_emit(ring__, 0); \
intel_ring_emit(ring__, 0); \
} while (0)
 
static int
pc_render_add_request(struct intel_ring_buffer *ring,
u32 *result)
{
struct drm_device *dev = ring->dev;
u32 seqno = i915_gem_get_seqno(dev);
struct pipe_control *pc = ring->private;
u32 scratch_addr = pc->gtt_offset + 128;
int ret;
 
/* For Ironlake, MI_USER_INTERRUPT was deprecated and apparently
* incoherent with writes to memory, i.e. completely fubar,
* so we need to use PIPE_NOTIFY instead.
*
* However, we also need to workaround the qword write
* incoherence by flushing the 6 PIPE_NOTIFY buffers out to
* memory before requesting an interrupt.
*/
ret = intel_ring_begin(ring, 32);
if (ret)
return ret;
 
intel_ring_emit(ring, GFX_OP_PIPE_CONTROL | PIPE_CONTROL_QW_WRITE |
PIPE_CONTROL_WC_FLUSH | PIPE_CONTROL_TC_FLUSH);
intel_ring_emit(ring, pc->gtt_offset | PIPE_CONTROL_GLOBAL_GTT);
intel_ring_emit(ring, seqno);
intel_ring_emit(ring, 0);
PIPE_CONTROL_FLUSH(ring, scratch_addr);
scratch_addr += 128; /* write to separate cachelines */
PIPE_CONTROL_FLUSH(ring, scratch_addr);
scratch_addr += 128;
PIPE_CONTROL_FLUSH(ring, scratch_addr);
scratch_addr += 128;
PIPE_CONTROL_FLUSH(ring, scratch_addr);
scratch_addr += 128;
PIPE_CONTROL_FLUSH(ring, scratch_addr);
scratch_addr += 128;
PIPE_CONTROL_FLUSH(ring, scratch_addr);
intel_ring_emit(ring, GFX_OP_PIPE_CONTROL | PIPE_CONTROL_QW_WRITE |
PIPE_CONTROL_WC_FLUSH | PIPE_CONTROL_TC_FLUSH |
PIPE_CONTROL_NOTIFY);
intel_ring_emit(ring, pc->gtt_offset | PIPE_CONTROL_GLOBAL_GTT);
intel_ring_emit(ring, seqno);
intel_ring_emit(ring, 0);
intel_ring_advance(ring);
 
*result = seqno;
return 0;
}
 
static int
render_ring_add_request(struct intel_ring_buffer *ring,
u32 *result)
{
struct drm_device *dev = ring->dev;
u32 seqno = i915_gem_get_seqno(dev);
int ret;
 
ret = intel_ring_begin(ring, 4);
if (ret)
return ret;
 
intel_ring_emit(ring, MI_STORE_DWORD_INDEX);
intel_ring_emit(ring, I915_GEM_HWS_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
intel_ring_emit(ring, seqno);
intel_ring_emit(ring, MI_USER_INTERRUPT);
intel_ring_advance(ring);
 
*result = seqno;
return 0;
}
 
static u32
ring_get_seqno(struct intel_ring_buffer *ring)
{
return intel_read_status_page(ring, I915_GEM_HWS_INDEX);
}
 
static u32
pc_render_get_seqno(struct intel_ring_buffer *ring)
{
struct pipe_control *pc = ring->private;
return pc->cpu_page[0];
}
 
static void
ironlake_enable_irq(drm_i915_private_t *dev_priv, u32 mask)
{
dev_priv->gt_irq_mask &= ~mask;
I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
POSTING_READ(GTIMR);
}
 
static void
ironlake_disable_irq(drm_i915_private_t *dev_priv, u32 mask)
{
dev_priv->gt_irq_mask |= mask;
I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
POSTING_READ(GTIMR);
}
 
static void
i915_enable_irq(drm_i915_private_t *dev_priv, u32 mask)
{
dev_priv->irq_mask &= ~mask;
I915_WRITE(IMR, dev_priv->irq_mask);
POSTING_READ(IMR);
}
 
static void
i915_disable_irq(drm_i915_private_t *dev_priv, u32 mask)
{
dev_priv->irq_mask |= mask;
I915_WRITE(IMR, dev_priv->irq_mask);
POSTING_READ(IMR);
}
 
static bool
render_ring_get_irq(struct intel_ring_buffer *ring)
{
struct drm_device *dev = ring->dev;
drm_i915_private_t *dev_priv = dev->dev_private;
 
if (!dev->irq_enabled)
return false;
 
spin_lock(&ring->irq_lock);
if (ring->irq_refcount++ == 0) {
if (HAS_PCH_SPLIT(dev))
ironlake_enable_irq(dev_priv,
GT_PIPE_NOTIFY | GT_USER_INTERRUPT);
else
i915_enable_irq(dev_priv, I915_USER_INTERRUPT);
}
spin_unlock(&ring->irq_lock);
 
return true;
}
 
static void
render_ring_put_irq(struct intel_ring_buffer *ring)
{
struct drm_device *dev = ring->dev;
drm_i915_private_t *dev_priv = dev->dev_private;
 
spin_lock(&ring->irq_lock);
if (--ring->irq_refcount == 0) {
if (HAS_PCH_SPLIT(dev))
ironlake_disable_irq(dev_priv,
GT_USER_INTERRUPT |
GT_PIPE_NOTIFY);
else
i915_disable_irq(dev_priv, I915_USER_INTERRUPT);
}
spin_unlock(&ring->irq_lock);
}
 
void intel_ring_setup_status_page(struct intel_ring_buffer *ring)
{
struct drm_device *dev = ring->dev;
drm_i915_private_t *dev_priv = ring->dev->dev_private;
u32 mmio = 0;
 
/* The ring status page addresses are no longer next to the rest of
* the ring registers as of gen7.
*/
if (IS_GEN7(dev)) {
switch (ring->id) {
case RING_RENDER:
mmio = RENDER_HWS_PGA_GEN7;
break;
case RING_BLT:
mmio = BLT_HWS_PGA_GEN7;
break;
case RING_BSD:
mmio = BSD_HWS_PGA_GEN7;
break;
}
} else if (IS_GEN6(ring->dev)) {
mmio = RING_HWS_PGA_GEN6(ring->mmio_base);
} else {
mmio = RING_HWS_PGA(ring->mmio_base);
}
 
I915_WRITE(mmio, (u32)ring->status_page.gfx_addr);
POSTING_READ(mmio);
}
#endif
 
static int
bsd_ring_flush(struct intel_ring_buffer *ring,
u32 invalidate_domains,
u32 flush_domains)
{
int ret;
 
ret = intel_ring_begin(ring, 2);
if (ret)
return ret;
 
intel_ring_emit(ring, MI_FLUSH);
intel_ring_emit(ring, MI_NOOP);
intel_ring_advance(ring);
return 0;
}
 
#if 0
 
static int
ring_add_request(struct intel_ring_buffer *ring,
u32 *result)
{
u32 seqno;
int ret;
 
ret = intel_ring_begin(ring, 4);
if (ret)
return ret;
 
seqno = i915_gem_get_seqno(ring->dev);
 
intel_ring_emit(ring, MI_STORE_DWORD_INDEX);
intel_ring_emit(ring, I915_GEM_HWS_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
intel_ring_emit(ring, seqno);
intel_ring_emit(ring, MI_USER_INTERRUPT);
intel_ring_advance(ring);
 
*result = seqno;
return 0;
}
 
static bool
gen6_ring_get_irq(struct intel_ring_buffer *ring, u32 gflag, u32 rflag)
{
struct drm_device *dev = ring->dev;
drm_i915_private_t *dev_priv = dev->dev_private;
 
if (!dev->irq_enabled)
return false;
 
spin_lock(&ring->irq_lock);
if (ring->irq_refcount++ == 0) {
ring->irq_mask &= ~rflag;
I915_WRITE_IMR(ring, ring->irq_mask);
ironlake_enable_irq(dev_priv, gflag);
}
spin_unlock(&ring->irq_lock);
 
return true;
}
 
static void
gen6_ring_put_irq(struct intel_ring_buffer *ring, u32 gflag, u32 rflag)
{
struct drm_device *dev = ring->dev;
drm_i915_private_t *dev_priv = dev->dev_private;
 
spin_lock(&ring->irq_lock);
if (--ring->irq_refcount == 0) {
ring->irq_mask |= rflag;
I915_WRITE_IMR(ring, ring->irq_mask);
ironlake_disable_irq(dev_priv, gflag);
}
spin_unlock(&ring->irq_lock);
}
 
static bool
bsd_ring_get_irq(struct intel_ring_buffer *ring)
{
struct drm_device *dev = ring->dev;
drm_i915_private_t *dev_priv = dev->dev_private;
 
if (!dev->irq_enabled)
return false;
 
spin_lock(&ring->irq_lock);
if (ring->irq_refcount++ == 0) {
if (IS_G4X(dev))
i915_enable_irq(dev_priv, I915_BSD_USER_INTERRUPT);
else
ironlake_enable_irq(dev_priv, GT_BSD_USER_INTERRUPT);
}
spin_unlock(&ring->irq_lock);
 
return true;
}
static void
bsd_ring_put_irq(struct intel_ring_buffer *ring)
{
struct drm_device *dev = ring->dev;
drm_i915_private_t *dev_priv = dev->dev_private;
 
spin_lock(&ring->irq_lock);
if (--ring->irq_refcount == 0) {
if (IS_G4X(dev))
i915_disable_irq(dev_priv, I915_BSD_USER_INTERRUPT);
else
ironlake_disable_irq(dev_priv, GT_BSD_USER_INTERRUPT);
}
spin_unlock(&ring->irq_lock);
}
 
static int
ring_dispatch_execbuffer(struct intel_ring_buffer *ring, u32 offset, u32 length)
{
int ret;
 
ret = intel_ring_begin(ring, 2);
if (ret)
return ret;
 
intel_ring_emit(ring,
MI_BATCH_BUFFER_START | (2 << 6) |
MI_BATCH_NON_SECURE_I965);
intel_ring_emit(ring, offset);
intel_ring_advance(ring);
 
return 0;
}
 
static int
render_ring_dispatch_execbuffer(struct intel_ring_buffer *ring,
u32 offset, u32 len)
{
struct drm_device *dev = ring->dev;
int ret;
 
if (IS_I830(dev) || IS_845G(dev)) {
ret = intel_ring_begin(ring, 4);
if (ret)
return ret;
 
intel_ring_emit(ring, MI_BATCH_BUFFER);
intel_ring_emit(ring, offset | MI_BATCH_NON_SECURE);
intel_ring_emit(ring, offset + len - 8);
intel_ring_emit(ring, 0);
} else {
ret = intel_ring_begin(ring, 2);
if (ret)
return ret;
 
if (INTEL_INFO(dev)->gen >= 4) {
intel_ring_emit(ring,
MI_BATCH_BUFFER_START | (2 << 6) |
MI_BATCH_NON_SECURE_I965);
intel_ring_emit(ring, offset);
} else {
intel_ring_emit(ring,
MI_BATCH_BUFFER_START | (2 << 6));
intel_ring_emit(ring, offset | MI_BATCH_NON_SECURE);
}
}
intel_ring_advance(ring);
 
return 0;
}
 
static void cleanup_status_page(struct intel_ring_buffer *ring)
{
drm_i915_private_t *dev_priv = ring->dev->dev_private;
struct drm_i915_gem_object *obj;
 
obj = ring->status_page.obj;
if (obj == NULL)
return;
 
kunmap(obj->pages[0]);
i915_gem_object_unpin(obj);
drm_gem_object_unreference(&obj->base);
ring->status_page.obj = NULL;
 
memset(&dev_priv->hws_map, 0, sizeof(dev_priv->hws_map));
}
 
static int init_status_page(struct intel_ring_buffer *ring)
{
struct drm_device *dev = ring->dev;
drm_i915_private_t *dev_priv = dev->dev_private;
struct drm_i915_gem_object *obj;
int ret;
 
obj = i915_gem_alloc_object(dev, 4096);
if (obj == NULL) {
DRM_ERROR("Failed to allocate status page\n");
ret = -ENOMEM;
goto err;
}
 
i915_gem_object_set_cache_level(obj, I915_CACHE_LLC);
 
ret = i915_gem_object_pin(obj, 4096, true);
if (ret != 0) {
goto err_unref;
}
 
ring->status_page.gfx_addr = obj->gtt_offset;
ring->status_page.page_addr = kmap(obj->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);
 
intel_ring_setup_status_page(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->base);
err:
return ret;
}
#endif
 
int intel_init_ring_buffer(struct drm_device *dev,
struct intel_ring_buffer *ring)
{
struct drm_i915_gem_object *obj=NULL;
int ret;
ENTER();
ring->dev = dev;
INIT_LIST_HEAD(&ring->active_list);
INIT_LIST_HEAD(&ring->request_list);
INIT_LIST_HEAD(&ring->gpu_write_list);
 
// init_waitqueue_head(&ring->irq_queue);
// spin_lock_init(&ring->irq_lock);
ring->irq_mask = ~0;
 
if (I915_NEED_GFX_HWS(dev)) {
// ret = init_status_page(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->obj = obj;
 
ret = i915_gem_object_pin(obj, PAGE_SIZE, true);
if (ret)
goto err_unref;
 
ring->map.size = ring->size;
ring->map.offset = get_bus_addr() + obj->gtt_offset;
ring->map.type = 0;
ring->map.flags = 0;
ring->map.mtrr = 0;
 
// drm_core_ioremap_wc(&ring->map, dev);
 
ring->map.handle = ioremap(ring->map.offset, ring->map.size);
 
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(ring);
if (ret)
goto err_unmap;
 
/* Workaround an erratum on the i830 which causes a hang if
* the TAIL pointer points to within the last 2 cachelines
* of the buffer.
*/
ring->effective_size = ring->size;
if (IS_I830(ring->dev))
ring->effective_size -= 128;
LEAVE();
return 0;
 
err_unmap:
// drm_core_ioremapfree(&ring->map, dev);
FreeKernelSpace(ring->virtual_start);
err_unpin:
// i915_gem_object_unpin(obj);
err_unref:
// drm_gem_object_unreference(&obj->base);
ring->obj = NULL;
err_hws:
// cleanup_status_page(ring);
return ret;
}
 
 
void intel_cleanup_ring_buffer(struct intel_ring_buffer *ring)
{
struct drm_i915_private *dev_priv;
int ret;
 
if (ring->obj == NULL)
return;
 
/* Disable the ring buffer. The ring must be idle at this point */
dev_priv = ring->dev->dev_private;
ret = intel_wait_ring_idle(ring);
if (ret)
DRM_ERROR("failed to quiesce %s whilst cleaning up: %d\n",
ring->name, ret);
 
I915_WRITE_CTL(ring, 0);
 
// drm_core_ioremapfree(&ring->map, ring->dev);
 
// i915_gem_object_unpin(ring->obj);
// drm_gem_object_unreference(&ring->obj->base);
ring->obj = NULL;
 
if (ring->cleanup)
ring->cleanup(ring);
 
// cleanup_status_page(ring);
}
 
 
static int intel_wrap_ring_buffer(struct intel_ring_buffer *ring)
{
unsigned int *virt;
int rem = ring->size - ring->tail;
 
if (ring->space < rem) {
int ret = intel_wait_ring_buffer(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_space(ring);
 
return 0;
}
 
int intel_wait_ring_buffer(struct intel_ring_buffer *ring, int n)
{
struct drm_device *dev = ring->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
unsigned long end;
u32 head;
 
/* If the reported head position has wrapped or hasn't advanced,
* fallback to the slow and accurate path.
*/
head = intel_read_status_page(ring, 4);
if (head > ring->head) {
ring->head = head;
ring->space = ring_space(ring);
if (ring->space >= n)
return 0;
}
 
// trace_i915_ring_wait_begin(ring);
end = jiffies + 3 * HZ;
do {
ring->head = I915_READ_HEAD(ring);
ring->space = ring_space(ring);
if (ring->space >= n) {
// trace_i915_ring_wait_end(ring);
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;
}
 
msleep(1);
if (atomic_read(&dev_priv->mm.wedged))
return -EAGAIN;
} while (!time_after(jiffies, end));
// trace_i915_ring_wait_end(ring);
return -EBUSY;
}
 
int intel_ring_begin(struct intel_ring_buffer *ring,
int num_dwords)
{
struct drm_i915_private *dev_priv = ring->dev->dev_private;
int n = 4*num_dwords;
int ret;
 
if (unlikely(atomic_read(&dev_priv->mm.wedged)))
return -EIO;
 
if (unlikely(ring->tail + n > ring->effective_size)) {
ret = intel_wrap_ring_buffer(ring);
if (unlikely(ret))
return ret;
}
 
if (unlikely(ring->space < n)) {
ret = intel_wait_ring_buffer(ring, n);
if (unlikely(ret))
return ret;
}
 
ring->space -= n;
return 0;
}
 
void intel_ring_advance(struct intel_ring_buffer *ring)
{
ring->tail &= ring->size - 1;
ring->write_tail(ring, ring->tail);
}
 
 
static const struct intel_ring_buffer render_ring = {
.name = "render ring",
.id = RING_RENDER,
.mmio_base = RENDER_RING_BASE,
.size = 32 * PAGE_SIZE,
.init = init_render_ring,
.write_tail = ring_write_tail,
.flush = render_ring_flush,
// .add_request = render_ring_add_request,
// .get_seqno = ring_get_seqno,
// .irq_get = render_ring_get_irq,
// .irq_put = render_ring_put_irq,
// .dispatch_execbuffer = render_ring_dispatch_execbuffer,
// .cleanup = render_ring_cleanup,
};
 
/* ring buffer for bit-stream decoder */
 
static const struct intel_ring_buffer bsd_ring = {
.name = "bsd ring",
.id = RING_BSD,
.mmio_base = BSD_RING_BASE,
.size = 32 * PAGE_SIZE,
.init = init_ring_common,
.write_tail = ring_write_tail,
.flush = bsd_ring_flush,
// .add_request = ring_add_request,
// .get_seqno = ring_get_seqno,
// .irq_get = bsd_ring_get_irq,
// .irq_put = bsd_ring_put_irq,
// .dispatch_execbuffer = ring_dispatch_execbuffer,
};
 
 
static void gen6_bsd_ring_write_tail(struct intel_ring_buffer *ring,
u32 value)
{
drm_i915_private_t *dev_priv = ring->dev->dev_private;
 
/* Every tail move must follow the sequence below */
I915_WRITE(GEN6_BSD_SLEEP_PSMI_CONTROL,
GEN6_BSD_SLEEP_PSMI_CONTROL_RC_ILDL_MESSAGE_MODIFY_MASK |
GEN6_BSD_SLEEP_PSMI_CONTROL_RC_ILDL_MESSAGE_DISABLE);
I915_WRITE(GEN6_BSD_RNCID, 0x0);
 
if (wait_for((I915_READ(GEN6_BSD_SLEEP_PSMI_CONTROL) &
GEN6_BSD_SLEEP_PSMI_CONTROL_IDLE_INDICATOR) == 0,
50))
DRM_ERROR("timed out waiting for IDLE Indicator\n");
 
I915_WRITE_TAIL(ring, value);
I915_WRITE(GEN6_BSD_SLEEP_PSMI_CONTROL,
GEN6_BSD_SLEEP_PSMI_CONTROL_RC_ILDL_MESSAGE_MODIFY_MASK |
GEN6_BSD_SLEEP_PSMI_CONTROL_RC_ILDL_MESSAGE_ENABLE);
}
 
 
static int gen6_ring_flush(struct intel_ring_buffer *ring,
u32 invalidate, u32 flush)
{
uint32_t cmd;
int ret;
 
ret = intel_ring_begin(ring, 4);
if (ret)
return ret;
 
cmd = MI_FLUSH_DW;
if (invalidate & I915_GEM_GPU_DOMAINS)
cmd |= MI_INVALIDATE_TLB | MI_INVALIDATE_BSD;
intel_ring_emit(ring, cmd);
intel_ring_emit(ring, 0);
intel_ring_emit(ring, 0);
intel_ring_emit(ring, MI_NOOP);
intel_ring_advance(ring);
return 0;
}
 
#if 0
static int
gen6_ring_dispatch_execbuffer(struct intel_ring_buffer *ring,
u32 offset, u32 len)
{
int ret;
 
ret = intel_ring_begin(ring, 2);
if (ret)
return ret;
 
intel_ring_emit(ring, MI_BATCH_BUFFER_START | MI_BATCH_NON_SECURE_I965);
/* bit0-7 is the length on GEN6+ */
intel_ring_emit(ring, offset);
intel_ring_advance(ring);
 
return 0;
}
 
static bool
gen6_render_ring_get_irq(struct intel_ring_buffer *ring)
{
return gen6_ring_get_irq(ring,
GT_USER_INTERRUPT,
GEN6_RENDER_USER_INTERRUPT);
}
 
static void
gen6_render_ring_put_irq(struct intel_ring_buffer *ring)
{
return gen6_ring_put_irq(ring,
GT_USER_INTERRUPT,
GEN6_RENDER_USER_INTERRUPT);
}
 
static bool
gen6_bsd_ring_get_irq(struct intel_ring_buffer *ring)
{
return gen6_ring_get_irq(ring,
GT_GEN6_BSD_USER_INTERRUPT,
GEN6_BSD_USER_INTERRUPT);
}
 
static void
gen6_bsd_ring_put_irq(struct intel_ring_buffer *ring)
{
return gen6_ring_put_irq(ring,
GT_GEN6_BSD_USER_INTERRUPT,
GEN6_BSD_USER_INTERRUPT);
}
 
#endif
 
/* ring buffer for Video Codec for Gen6+ */
static const struct intel_ring_buffer gen6_bsd_ring = {
.name = "gen6 bsd ring",
.id = RING_BSD,
.mmio_base = GEN6_BSD_RING_BASE,
.size = 32 * PAGE_SIZE,
.init = init_ring_common,
.write_tail = gen6_bsd_ring_write_tail,
.flush = gen6_ring_flush,
// .add_request = gen6_add_request,
// .get_seqno = ring_get_seqno,
// .irq_get = gen6_bsd_ring_get_irq,
// .irq_put = gen6_bsd_ring_put_irq,
// .dispatch_execbuffer = gen6_ring_dispatch_execbuffer,
};
 
#if 0
/* Blitter support (SandyBridge+) */
 
static bool
blt_ring_get_irq(struct intel_ring_buffer *ring)
{
return gen6_ring_get_irq(ring,
GT_BLT_USER_INTERRUPT,
GEN6_BLITTER_USER_INTERRUPT);
}
 
static void
blt_ring_put_irq(struct intel_ring_buffer *ring)
{
gen6_ring_put_irq(ring,
GT_BLT_USER_INTERRUPT,
GEN6_BLITTER_USER_INTERRUPT);
}
#endif
 
 
/* Workaround for some stepping of SNB,
* each time when BLT engine ring tail moved,
* the first command in the ring to be parsed
* should be MI_BATCH_BUFFER_START
*/
#define NEED_BLT_WORKAROUND(dev) \
(IS_GEN6(dev) && (dev->pdev->revision < 8))
 
static inline struct drm_i915_gem_object *
to_blt_workaround(struct intel_ring_buffer *ring)
{
return ring->private;
}
 
 
static int blt_ring_init(struct intel_ring_buffer *ring)
{
if (NEED_BLT_WORKAROUND(ring->dev)) {
struct drm_i915_gem_object *obj;
u32 *ptr;
int ret;
 
obj = i915_gem_alloc_object(ring->dev, 4096);
if (obj == NULL)
return -ENOMEM;
 
ret = i915_gem_object_pin(obj, 4096, true);
if (ret) {
// drm_gem_object_unreference(&obj->base);
return ret;
}
 
ptr = ioremap(obj->pages[0], 4096);
*ptr++ = MI_BATCH_BUFFER_END;
*ptr++ = MI_NOOP;
iounmap(obj->pages[0]);
 
ret = i915_gem_object_set_to_gtt_domain(obj, false);
if (ret) {
// i915_gem_object_unpin(obj);
// drm_gem_object_unreference(&obj->base);
return ret;
}
 
ring->private = obj;
}
 
return init_ring_common(ring);
}
 
static int blt_ring_begin(struct intel_ring_buffer *ring,
int num_dwords)
{
if (ring->private) {
int ret = intel_ring_begin(ring, num_dwords+2);
if (ret)
return ret;
 
intel_ring_emit(ring, MI_BATCH_BUFFER_START);
intel_ring_emit(ring, to_blt_workaround(ring)->gtt_offset);
 
return 0;
} else
return intel_ring_begin(ring, 4);
}
 
static int blt_ring_flush(struct intel_ring_buffer *ring,
u32 invalidate, u32 flush)
{
uint32_t cmd;
int ret;
 
ret = blt_ring_begin(ring, 4);
if (ret)
return ret;
 
cmd = MI_FLUSH_DW;
if (invalidate & I915_GEM_DOMAIN_RENDER)
cmd |= MI_INVALIDATE_TLB;
intel_ring_emit(ring, cmd);
intel_ring_emit(ring, 0);
intel_ring_emit(ring, 0);
intel_ring_emit(ring, MI_NOOP);
intel_ring_advance(ring);
return 0;
}
 
static void blt_ring_cleanup(struct intel_ring_buffer *ring)
{
if (!ring->private)
return;
 
i915_gem_object_unpin(ring->private);
drm_gem_object_unreference(ring->private);
ring->private = NULL;
}
 
 
static const struct intel_ring_buffer gen6_blt_ring = {
.name = "blt ring",
.id = RING_BLT,
.mmio_base = BLT_RING_BASE,
.size = 32 * PAGE_SIZE,
.init = blt_ring_init,
.write_tail = ring_write_tail,
.flush = blt_ring_flush,
// .add_request = gen6_add_request,
// .get_seqno = ring_get_seqno,
// .irq_get = blt_ring_get_irq,
// .irq_put = blt_ring_put_irq,
// .dispatch_execbuffer = gen6_ring_dispatch_execbuffer,
// .cleanup = blt_ring_cleanup,
};
 
 
 
int intel_init_render_ring_buffer(struct drm_device *dev)
{
drm_i915_private_t *dev_priv = dev->dev_private;
struct intel_ring_buffer *ring = &dev_priv->ring[RCS];
ENTER();
*ring = render_ring;
if (INTEL_INFO(dev)->gen >= 6) {
// ring->add_request = gen6_add_request;
// ring->irq_get = gen6_render_ring_get_irq;
// ring->irq_put = gen6_render_ring_put_irq;
} else if (IS_GEN5(dev)) {
// ring->add_request = pc_render_add_request;
// ring->get_seqno = pc_render_get_seqno;
}
 
if (!I915_NEED_GFX_HWS(dev)) {
ring->status_page.page_addr = dev_priv->status_page_dmah->vaddr;
memset(ring->status_page.page_addr, 0, PAGE_SIZE);
}
LEAVE();
return intel_init_ring_buffer(dev, ring);
}
 
 
int intel_init_bsd_ring_buffer(struct drm_device *dev)
{
drm_i915_private_t *dev_priv = dev->dev_private;
struct intel_ring_buffer *ring = &dev_priv->ring[VCS];
 
if (IS_GEN6(dev) || IS_GEN7(dev))
*ring = gen6_bsd_ring;
else
*ring = bsd_ring;
 
return intel_init_ring_buffer(dev, ring);
}
 
int intel_init_blt_ring_buffer(struct drm_device *dev)
{
drm_i915_private_t *dev_priv = dev->dev_private;
struct intel_ring_buffer *ring = &dev_priv->ring[BCS];
 
*ring = gen6_blt_ring;
 
return intel_init_ring_buffer(dev, ring);
}