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drm/i915: kill resource streamer support

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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
v4: - move I915_EXEC_RESOURCE_STREAMER to __I915_EXEC_ILLEGAL_FLAGS so
      the check on ioctl() is made much earlier by
      i915_gem_check_execbuffer() (suggested by Tvrtko)

Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Acked-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20180803232443.17193-1-lucas.demarchi@intel.com
This commit is contained in:
Lucas De Marchi 2018-08-03 16:24:43 -07:00 • committed by Chris Wilson
parent 48928d4b5d
commit 08e3e21a24
8 changed files with 9 additions and 33 deletions
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4
drivers/gpu/drm/i915/i915_pci.c
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@ -368,7 +368,6 @@ 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
@ -441,7 +440,6 @@ 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,
@ -515,7 +513,6 @@ 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, \
@ -604,7 +601,6 @@ 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 = {