[Intel-gfx] [PATCH v3 2/2] drm/i915: kill resource streamer
Lucas De Marchi
lucas.demarchi at intel.com
Thu Jul 19 17:05:57 UTC 2018
After disabling resource streamer on ICL (due to it actually not
existing there), I got feedback that there have been some experimental
patches for mesa to use RS years ago, but nothing ever landed or shipped
because there was no performance improvement.
This removes it from kernel keeping the uapi defines around for
compatibility.
v2: - re-add the inadvertent removal of CTX_CTRL_INHIBIT_SYN_CTX_SWITCH
- don't bother trying to document removed params on uapi header:
applications should know that from the query.
(from Chris)
v3: - disable CTX_CTRL_RS_CTX_ENABLE istead of removing it
- reword commit message after Daniele confirmed no performance
regression on his machine
- reword commit message to make clear RS is being removed due to
never been used
Signed-off-by: Lucas De Marchi <lucas.demarchi at intel.com>
Acked-by: Daniele Ceraolo Spurio <daniele.ceraolospurio at intel.com>
---
drivers/gpu/drm/i915/i915_drv.c | 2 +-
drivers/gpu/drm/i915/i915_drv.h | 2 --
drivers/gpu/drm/i915/i915_gem_execbuffer.c | 15 ++-------------
drivers/gpu/drm/i915/i915_pci.c | 4 ----
drivers/gpu/drm/i915/intel_device_info.h | 1 -
drivers/gpu/drm/i915/intel_lrc.c | 10 ++++------
drivers/gpu/drm/i915/intel_ringbuffer.c | 4 +---
drivers/gpu/drm/i915/intel_ringbuffer.h | 1 -
8 files changed, 8 insertions(+), 31 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 3834bd758a2e..b4b43402cc0c 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -373,7 +373,7 @@ static int i915_getparam_ioctl(struct drm_device *dev, void *data,
value = 2;
break;
case I915_PARAM_HAS_RESOURCE_STREAMER:
- value = HAS_RESOURCE_STREAMER(dev_priv);
+ value = 0;
break;
case I915_PARAM_HAS_POOLED_EU:
value = HAS_POOLED_EU(dev_priv);
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 4fb937399440..0b22ca0b24a8 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -2612,8 +2612,6 @@ intel_info(const struct drm_i915_private *dev_priv)
#define USES_GUC_SUBMISSION(dev_priv) intel_uc_is_using_guc_submission()
#define USES_HUC(dev_priv) intel_uc_is_using_huc()
-#define HAS_RESOURCE_STREAMER(dev_priv) ((dev_priv)->info.has_resource_streamer)
-
#define HAS_POOLED_EU(dev_priv) ((dev_priv)->info.has_pooled_eu)
#define INTEL_PCH_DEVICE_ID_MASK 0xff80
diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
index 1932bc227942..ca21a08b2be9 100644
--- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
@@ -2221,19 +2221,8 @@ i915_gem_do_execbuffer(struct drm_device *dev,
if (!eb.engine)
return -EINVAL;
- if (args->flags & I915_EXEC_RESOURCE_STREAMER) {
- if (!HAS_RESOURCE_STREAMER(eb.i915)) {
- DRM_DEBUG("RS is only allowed for Haswell and Gen8 - Gen10\n");
- return -EINVAL;
- }
- if (eb.engine->id != RCS) {
- DRM_DEBUG("RS is not available on %s\n",
- eb.engine->name);
- return -EINVAL;
- }
-
- eb.batch_flags |= I915_DISPATCH_RS;
- }
+ if (args->flags & I915_EXEC_RESOURCE_STREAMER)
+ return -EINVAL;
if (args->flags & I915_EXEC_FENCE_IN) {
in_fence = sync_file_get_fence(lower_32_bits(args->rsvd2));
diff --git a/drivers/gpu/drm/i915/i915_pci.c b/drivers/gpu/drm/i915/i915_pci.c
index 3a4bb017d676..7b570ba90d9f 100644
--- a/drivers/gpu/drm/i915/i915_pci.c
+++ b/drivers/gpu/drm/i915/i915_pci.c
@@ -360,7 +360,6 @@ static const struct intel_device_info intel_valleyview_info = {
.has_ddi = 1, \
.has_fpga_dbg = 1, \
.has_psr = 1, \
- .has_resource_streamer = 1, \
.has_dp_mst = 1, \
.has_rc6p = 0 /* RC6p removed-by HSW */, \
.has_runtime_pm = 1
@@ -433,7 +432,6 @@ static const struct intel_device_info intel_cherryview_info = {
.ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING,
.has_64bit_reloc = 1,
.has_runtime_pm = 1,
- .has_resource_streamer = 1,
.has_rc6 = 1,
.has_logical_ring_contexts = 1,
.has_gmch_display = 1,
@@ -506,7 +504,6 @@ static const struct intel_device_info intel_skylake_gt4_info = {
.has_runtime_pm = 1, \
.has_pooled_eu = 0, \
.has_csr = 1, \
- .has_resource_streamer = 1, \
.has_rc6 = 1, \
.has_dp_mst = 1, \
.has_logical_ring_contexts = 1, \
@@ -593,7 +590,6 @@ static const struct intel_device_info intel_cannonlake_info = {
GEN(11), \
.ddb_size = 2048, \
.has_csr = 0, \
- .has_resource_streamer = 0, \
.has_logical_ring_elsq = 1
static const struct intel_device_info intel_icelake_11_info = {
diff --git a/drivers/gpu/drm/i915/intel_device_info.h b/drivers/gpu/drm/i915/intel_device_info.h
index 633f9fbf72ea..6814cc7dfcd3 100644
--- a/drivers/gpu/drm/i915/intel_device_info.h
+++ b/drivers/gpu/drm/i915/intel_device_info.h
@@ -103,7 +103,6 @@ enum intel_platform {
func(has_psr); \
func(has_rc6); \
func(has_rc6p); \
- func(has_resource_streamer); \
func(has_runtime_pm); \
func(has_snoop); \
func(unfenced_needs_alignment); \
diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index 174479232e94..3726709b8df3 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -2066,8 +2066,7 @@ static int gen8_emit_bb_start(struct i915_request *rq,
/* FIXME(BDW): Address space and security selectors. */
*cs++ = MI_BATCH_BUFFER_START_GEN8 |
- (flags & I915_DISPATCH_SECURE ? 0 : BIT(8)) |
- (flags & I915_DISPATCH_RS ? MI_BATCH_RESOURCE_STREAMER : 0);
+ (flags & I915_DISPATCH_SECURE ? 0 : BIT(8));
*cs++ = lower_32_bits(offset);
*cs++ = upper_32_bits(offset);
@@ -2585,10 +2584,9 @@ static void execlists_init_reg_state(u32 *regs,
CTX_REG(regs, CTX_CONTEXT_CONTROL, RING_CONTEXT_CONTROL(engine),
_MASKED_BIT_DISABLE(CTX_CTRL_ENGINE_CTX_RESTORE_INHIBIT |
- CTX_CTRL_ENGINE_CTX_SAVE_INHIBIT) |
- _MASKED_BIT_ENABLE(CTX_CTRL_INHIBIT_SYN_CTX_SWITCH |
- (HAS_RESOURCE_STREAMER(dev_priv) ?
- CTX_CTRL_RS_CTX_ENABLE : 0)));
+ CTX_CTRL_ENGINE_CTX_SAVE_INHIBIT |
+ CTX_CTRL_RS_CTX_ENABLE) |
+ _MASKED_BIT_ENABLE(CTX_CTRL_INHIBIT_SYN_CTX_SWITCH));
CTX_REG(regs, CTX_RING_HEAD, RING_HEAD(base), 0);
CTX_REG(regs, CTX_RING_TAIL, RING_TAIL(base), 0);
CTX_REG(regs, CTX_RING_BUFFER_START, RING_START(base), 0);
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 33faad3197fe..763f56072308 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -1982,9 +1982,7 @@ hsw_emit_bb_start(struct i915_request *rq,
return PTR_ERR(cs);
*cs++ = MI_BATCH_BUFFER_START | (dispatch_flags & I915_DISPATCH_SECURE ?
- 0 : MI_BATCH_PPGTT_HSW | MI_BATCH_NON_SECURE_HSW) |
- (dispatch_flags & I915_DISPATCH_RS ?
- MI_BATCH_RESOURCE_STREAMER : 0);
+ 0 : MI_BATCH_PPGTT_HSW | MI_BATCH_NON_SECURE_HSW);
/* bit0-7 is the length on GEN6+ */
*cs++ = offset;
intel_ring_advance(rq, cs);
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h
index f5ffa6d31e82..8c174e87686b 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.h
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.h
@@ -474,7 +474,6 @@ struct intel_engine_cs {
unsigned int dispatch_flags);
#define I915_DISPATCH_SECURE BIT(0)
#define I915_DISPATCH_PINNED BIT(1)
-#define I915_DISPATCH_RS BIT(2)
void (*emit_breadcrumb)(struct i915_request *rq, u32 *cs);
int emit_breadcrumb_sz;
--
2.17.1
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