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Merge tag 'drm-intel-fixes-2017-06-20' of git://anongit.freedesktop.org/git/drm-intel into drm-fixes 

drm/i915 fixes for v4.12-rc7

* tag 'drm-intel-fixes-2017-06-20' of git://anongit.freedesktop.org/git/drm-intel:
  drm/i915: Don't enable backlight at setup time.
  drm/i915: Plumb the correct acquire ctx into intel_crtc_disable_noatomic()
  drm/i915: Fix deadlock witha the pipe A quirk during resume
  drm/i915: Remove __GFP_NORETRY from our buffer allocator
  drm/i915: Encourage our shrinker more when our shmemfs allocations fails
  drm/i915: Differentiate between sw write location into ring and last hw read
This commit is contained in:
Dave Airlie 2017-06-21 11:22:34 +10:00
parent 41f1830f5a a8ae0a773d
commit 09da4baa4d
8 changed files with 106 additions and 59 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

61
drivers/gpu/drm/i915/i915_gem.c
View File

@ -2285,8 +2285,8 @@ i915_gem_object_get_pages_gtt(struct drm_i915_gem_object *obj)
struct page *page;
unsigned long last_pfn = 0; /* suppress gcc warning */
unsigned int max_segment;
gfp_t noreclaim;
int ret;
gfp_t gfp;
/* Assert that the object is not currently in any GPU domain. As it
* wasn't in the GTT, there shouldn't be any way it could have been in
@ -2315,22 +2315,31 @@ rebuild_st:
* Fail silently without starting the shrinker
*/
mapping = obj->base.filp->f_mapping;
gfp = mapping_gfp_constraint(mapping, ~(__GFP_IO | __GFP_RECLAIM));
gfp |= __GFP_NORETRY | __GFP_NOWARN;
noreclaim = mapping_gfp_constraint(mapping,
~(__GFP_IO | __GFP_RECLAIM));
noreclaim |= __GFP_NORETRY | __GFP_NOWARN;
sg = st->sgl;
st->nents = 0;
for (i = 0; i < page_count; i++) {
page = shmem_read_mapping_page_gfp(mapping, i, gfp);
if (unlikely(IS_ERR(page))) {
i915_gem_shrink(dev_priv,
page_count,
I915_SHRINK_BOUND |
I915_SHRINK_UNBOUND |
I915_SHRINK_PURGEABLE);
const unsigned int shrink[] = {
I915_SHRINK_BOUND | I915_SHRINK_UNBOUND | I915_SHRINK_PURGEABLE,
0,
}, *s = shrink;
gfp_t gfp = noreclaim;
do {
page = shmem_read_mapping_page_gfp(mapping, i, gfp);
}
if (unlikely(IS_ERR(page))) {
gfp_t reclaim;
if (likely(!IS_ERR(page)))
break;
if (!*s) {
ret = PTR_ERR(page);
goto err_sg;
}
i915_gem_shrink(dev_priv, 2 * page_count, *s++);
cond_resched();
/* We've tried hard to allocate the memory by reaping
* our own buffer, now let the real VM do its job and
@ -2340,15 +2349,26 @@ rebuild_st:
* defer the oom here by reporting the ENOMEM back
* to userspace.
*/
reclaim = mapping_gfp_mask(mapping);
reclaim |= __GFP_NORETRY; /* reclaim, but no oom */
if (!*s) {
/* reclaim and warn, but no oom */
gfp = mapping_gfp_mask(mapping);
page = shmem_read_mapping_page_gfp(mapping, i, reclaim);
if (IS_ERR(page)) {
ret = PTR_ERR(page);
goto err_sg;
/* Our bo are always dirty and so we require
* kswapd to reclaim our pages (direct reclaim
* does not effectively begin pageout of our
* buffers on its own). However, direct reclaim
* only waits for kswapd when under allocation
* congestion. So as a result __GFP_RECLAIM is
* unreliable and fails to actually reclaim our
* dirty pages -- unless you try over and over
* again with !__GFP_NORETRY. However, we still
* want to fail this allocation rather than
* trigger the out-of-memory killer and for
* this we want the future __GFP_MAYFAIL.
*/
}
}
} while (1);
if (!i ||
sg->length >= max_segment ||
page_to_pfn(page) != last_pfn + 1) {
@ -4222,6 +4242,7 @@ i915_gem_object_create(struct drm_i915_private *dev_priv, u64 size)
mapping = obj->base.filp->f_mapping;
mapping_set_gfp_mask(mapping, mask);
GEM_BUG_ON(!(mapping_gfp_mask(mapping) & __GFP_RECLAIM));
i915_gem_object_init(obj, &i915_gem_object_ops);

2
drivers/gpu/drm/i915/i915_gem_request.c
View File

@ -623,7 +623,7 @@ i915_gem_request_alloc(struct intel_engine_cs *engine,
* GPU processing the request, we never over-estimate the
* position of the head.
*/
req->head = req->ring->tail;
req->head = req->ring->emit;
/* Check that we didn't interrupt ourselves with a new request */
GEM_BUG_ON(req->timeline->seqno != req->fence.seqno);

4
drivers/gpu/drm/i915/i915_guc_submission.c
View File

@ -480,9 +480,7 @@ static void guc_wq_item_append(struct i915_guc_client *client,
GEM_BUG_ON(freespace < wqi_size);
/* The GuC firmware wants the tail index in QWords, not bytes */
tail = rq->tail;
assert_ring_tail_valid(rq->ring, rq->tail);
tail >>= 3;
tail = intel_ring_set_tail(rq->ring, rq->tail) >> 3;
GEM_BUG_ON(tail > WQ_RING_TAIL_MAX);
/* For now workqueue item is 4 DWs; workqueue buffer is 2 pages. So we

30
drivers/gpu/drm/i915/intel_display.c
View File

@ -120,7 +120,8 @@ static void intel_crtc_init_scalers(struct intel_crtc *crtc,
static void skylake_pfit_enable(struct intel_crtc *crtc);
static void ironlake_pfit_disable(struct intel_crtc *crtc, bool force);
static void ironlake_pfit_enable(struct intel_crtc *crtc);
static void intel_modeset_setup_hw_state(struct drm_device *dev);
static void intel_modeset_setup_hw_state(struct drm_device *dev,
struct drm_modeset_acquire_ctx *ctx);
static void intel_pre_disable_primary_noatomic(struct drm_crtc *crtc);
struct intel_limit {
@ -3449,7 +3450,7 @@ __intel_display_resume(struct drm_device *dev,
struct drm_crtc *crtc;
int i, ret;
intel_modeset_setup_hw_state(dev);
intel_modeset_setup_hw_state(dev, ctx);
i915_redisable_vga(to_i915(dev));
if (!state)
@ -5825,7 +5826,8 @@ static void i9xx_crtc_disable(struct intel_crtc_state *old_crtc_state,
intel_update_watermarks(intel_crtc);
}
static void intel_crtc_disable_noatomic(struct drm_crtc *crtc)
static void intel_crtc_disable_noatomic(struct drm_crtc *crtc,
struct drm_modeset_acquire_ctx *ctx)
{
struct intel_encoder *encoder;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
@ -5855,7 +5857,7 @@ static void intel_crtc_disable_noatomic(struct drm_crtc *crtc)
return;
}
state->acquire_ctx = crtc->dev->mode_config.acquire_ctx;
state->acquire_ctx = ctx;
/* Everything's already locked, -EDEADLK can't happen. */
crtc_state = intel_atomic_get_crtc_state(state, intel_crtc);
@ -15030,7 +15032,7 @@ int intel_modeset_init(struct drm_device *dev)
intel_setup_outputs(dev_priv);
drm_modeset_lock_all(dev);
intel_modeset_setup_hw_state(dev);
intel_modeset_setup_hw_state(dev, dev->mode_config.acquire_ctx);
drm_modeset_unlock_all(dev);
for_each_intel_crtc(dev, crtc) {
@ -15067,13 +15069,13 @@ int intel_modeset_init(struct drm_device *dev)
return 0;
}
static void intel_enable_pipe_a(struct drm_device *dev)
static void intel_enable_pipe_a(struct drm_device *dev,
struct drm_modeset_acquire_ctx *ctx)
{
struct intel_connector *connector;
struct drm_connector_list_iter conn_iter;
struct drm_connector *crt = NULL;
struct intel_load_detect_pipe load_detect_temp;
struct drm_modeset_acquire_ctx *ctx = dev->mode_config.acquire_ctx;
int ret;
/* We can't just switch on the pipe A, we need to set things up with a
@ -15145,7 +15147,8 @@ static bool has_pch_trancoder(struct drm_i915_private *dev_priv,
(HAS_PCH_LPT_H(dev_priv) && pch_transcoder == TRANSCODER_A);
}
static void intel_sanitize_crtc(struct intel_crtc *crtc)
static void intel_sanitize_crtc(struct intel_crtc *crtc,
struct drm_modeset_acquire_ctx *ctx)
{
struct drm_device *dev = crtc->base.dev;
struct drm_i915_private *dev_priv = to_i915(dev);
@ -15191,7 +15194,7 @@ static void intel_sanitize_crtc(struct intel_crtc *crtc)
plane = crtc->plane;
crtc->base.primary->state->visible = true;
crtc->plane = !plane;
intel_crtc_disable_noatomic(&crtc->base);
intel_crtc_disable_noatomic(&crtc->base, ctx);
crtc->plane = plane;
}
@ -15201,13 +15204,13 @@ static void intel_sanitize_crtc(struct intel_crtc *crtc)
* resume. Force-enable the pipe to fix this, the update_dpms
* call below we restore the pipe to the right state, but leave
* the required bits on. */
intel_enable_pipe_a(dev);
intel_enable_pipe_a(dev, ctx);
}
/* Adjust the state of the output pipe according to whether we
* have active connectors/encoders. */
if (crtc->active && !intel_crtc_has_encoders(crtc))
intel_crtc_disable_noatomic(&crtc->base);
intel_crtc_disable_noatomic(&crtc->base, ctx);
if (crtc->active || HAS_GMCH_DISPLAY(dev_priv)) {
/*
@ -15505,7 +15508,8 @@ get_encoder_power_domains(struct drm_i915_private *dev_priv)
* and sanitizes it to the current state
*/
static void
intel_modeset_setup_hw_state(struct drm_device *dev)
intel_modeset_setup_hw_state(struct drm_device *dev,
struct drm_modeset_acquire_ctx *ctx)
{
struct drm_i915_private *dev_priv = to_i915(dev);
enum pipe pipe;
@ -15525,7 +15529,7 @@ intel_modeset_setup_hw_state(struct drm_device *dev)
for_each_pipe(dev_priv, pipe) {
crtc = intel_get_crtc_for_pipe(dev_priv, pipe);
intel_sanitize_crtc(crtc);
intel_sanitize_crtc(crtc, ctx);
intel_dump_pipe_config(crtc, crtc->config,
"[setup_hw_state]");
}

2
drivers/gpu/drm/i915/intel_dp_aux_backlight.c
View File

@ -119,8 +119,6 @@ static int intel_dp_aux_setup_backlight(struct intel_connector *connector,
struct intel_dp *intel_dp = enc_to_intel_dp(&connector->encoder->base);
struct intel_panel *panel = &connector->panel;
intel_dp_aux_enable_backlight(connector);
if (intel_dp->edp_dpcd[2] & DP_EDP_BACKLIGHT_BRIGHTNESS_BYTE_COUNT)
panel->backlight.max = 0xFFFF;
else

6
drivers/gpu/drm/i915/intel_lrc.c
View File

@ -326,8 +326,7 @@ static u64 execlists_update_context(struct drm_i915_gem_request *rq)
rq->ctx->ppgtt ?: rq->i915->mm.aliasing_ppgtt;
u32 *reg_state = ce->lrc_reg_state;
assert_ring_tail_valid(rq->ring, rq->tail);
reg_state[CTX_RING_TAIL+1] = rq->tail;
reg_state[CTX_RING_TAIL+1] = intel_ring_set_tail(rq->ring, rq->tail);
/* True 32b PPGTT with dynamic page allocation: update PDP
* registers and point the unallocated PDPs to scratch page.
@ -2036,8 +2035,7 @@ void intel_lr_context_resume(struct drm_i915_private *dev_priv)
ce->state->obj->mm.dirty = true;
i915_gem_object_unpin_map(ce->state->obj);
ce->ring->head = ce->ring->tail = 0;
intel_ring_update_space(ce->ring);
intel_ring_reset(ce->ring, 0);
}
}
}

41
drivers/gpu/drm/i915/intel_ringbuffer.c
View File

@ -49,7 +49,7 @@ static int __intel_ring_space(int head, int tail, int size)
void intel_ring_update_space(struct intel_ring *ring)
{
ring->space = __intel_ring_space(ring->head, ring->tail, ring->size);
ring->space = __intel_ring_space(ring->head, ring->emit, ring->size);
}
static int
@ -774,8 +774,8 @@ static void i9xx_submit_request(struct drm_i915_gem_request *request)
i915_gem_request_submit(request);
assert_ring_tail_valid(request->ring, request->tail);
I915_WRITE_TAIL(request->engine, request->tail);
I915_WRITE_TAIL(request->engine,
intel_ring_set_tail(request->ring, request->tail));
}
static void i9xx_emit_breadcrumb(struct drm_i915_gem_request *req, u32 *cs)
@ -1316,11 +1316,23 @@ err:
return PTR_ERR(addr);
}
void intel_ring_reset(struct intel_ring *ring, u32 tail)
{
GEM_BUG_ON(!list_empty(&ring->request_list));
ring->tail = tail;
ring->head = tail;
ring->emit = tail;
intel_ring_update_space(ring);
}
void intel_ring_unpin(struct intel_ring *ring)
{
GEM_BUG_ON(!ring->vma);
GEM_BUG_ON(!ring->vaddr);
/* Discard any unused bytes beyond that submitted to hw. */
intel_ring_reset(ring, ring->tail);
if (i915_vma_is_map_and_fenceable(ring->vma))
i915_vma_unpin_iomap(ring->vma);
else
@ -1562,8 +1574,9 @@ void intel_legacy_submission_resume(struct drm_i915_private *dev_priv)
struct intel_engine_cs *engine;
enum intel_engine_id id;
/* Restart from the beginning of the rings for convenience */
for_each_engine(engine, dev_priv, id)
engine->buffer->head = engine->buffer->tail;
intel_ring_reset(engine->buffer, 0);
}
static int ring_request_alloc(struct drm_i915_gem_request *request)
@ -1616,7 +1629,7 @@ static int wait_for_space(struct drm_i915_gem_request *req, int bytes)
unsigned space;
/* Would completion of this request free enough space? */
space = __intel_ring_space(target->postfix, ring->tail,
space = __intel_ring_space(target->postfix, ring->emit,
ring->size);
if (space >= bytes)
break;
@ -1641,8 +1654,8 @@ static int wait_for_space(struct drm_i915_gem_request *req, int bytes)
u32 *intel_ring_begin(struct drm_i915_gem_request *req, int num_dwords)
{
struct intel_ring *ring = req->ring;
int remain_actual = ring->size - ring->tail;
int remain_usable = ring->effective_size - ring->tail;
int remain_actual = ring->size - ring->emit;
int remain_usable = ring->effective_size - ring->emit;
int bytes = num_dwords * sizeof(u32);
int total_bytes, wait_bytes;
bool need_wrap = false;
@ -1678,17 +1691,17 @@ u32 *intel_ring_begin(struct drm_i915_gem_request *req, int num_dwords)
if (unlikely(need_wrap)) {
GEM_BUG_ON(remain_actual > ring->space);
GEM_BUG_ON(ring->tail + remain_actual > ring->size);
GEM_BUG_ON(ring->emit + remain_actual > ring->size);
/* Fill the tail with MI_NOOP */
memset(ring->vaddr + ring->tail, 0, remain_actual);
ring->tail = 0;
memset(ring->vaddr + ring->emit, 0, remain_actual);
ring->emit = 0;
ring->space -= remain_actual;
}
GEM_BUG_ON(ring->tail > ring->size - bytes);
cs = ring->vaddr + ring->tail;
ring->tail += bytes;
GEM_BUG_ON(ring->emit > ring->size - bytes);
cs = ring->vaddr + ring->emit;
ring->emit += bytes;
ring->space -= bytes;
GEM_BUG_ON(ring->space < 0);
@ -1699,7 +1712,7 @@ u32 *intel_ring_begin(struct drm_i915_gem_request *req, int num_dwords)
int intel_ring_cacheline_align(struct drm_i915_gem_request *req)
{
int num_dwords =
(req->ring->tail & (CACHELINE_BYTES - 1)) / sizeof(uint32_t);
(req->ring->emit & (CACHELINE_BYTES - 1)) / sizeof(uint32_t);
u32 *cs;
if (num_dwords == 0)

19
drivers/gpu/drm/i915/intel_ringbuffer.h
View File

@ -145,6 +145,7 @@ struct intel_ring {
u32 head;
u32 tail;
u32 emit;
int space;
int size;
@ -488,6 +489,8 @@ intel_write_status_page(struct intel_engine_cs *engine, int reg, u32 value)
struct intel_ring *
intel_engine_create_ring(struct intel_engine_cs *engine, int size);
int intel_ring_pin(struct intel_ring *ring, unsigned int offset_bias);
void intel_ring_reset(struct intel_ring *ring, u32 tail);
void intel_ring_update_space(struct intel_ring *ring);
void intel_ring_unpin(struct intel_ring *ring);
void intel_ring_free(struct intel_ring *ring);
@ -511,7 +514,7 @@ intel_ring_advance(struct drm_i915_gem_request *req, u32 *cs)
* reserved for the command packet (i.e. the value passed to
* intel_ring_begin()).
*/
GEM_BUG_ON((req->ring->vaddr + req->ring->tail) != cs);
GEM_BUG_ON((req->ring->vaddr + req->ring->emit) != cs);
}
static inline u32
@ -540,7 +543,19 @@ assert_ring_tail_valid(const struct intel_ring *ring, unsigned int tail)
GEM_BUG_ON(tail >= ring->size);
}
void intel_ring_update_space(struct intel_ring *ring);
static inline unsigned int
intel_ring_set_tail(struct intel_ring *ring, unsigned int tail)
{
/* Whilst writes to the tail are strictly order, there is no
* serialisation between readers and the writers. The tail may be
* read by i915_gem_request_retire() just as it is being updated
* by execlists, as although the breadcrumb is complete, the context
* switch hasn't been seen.
*/
assert_ring_tail_valid(ring, tail);
ring->tail = tail;
return tail;
}
void intel_engine_init_global_seqno(struct intel_engine_cs *engine, u32 seqno);