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| author | CQ Tang <cq.tang@intel.com> | 2022-03-24 14:31:23 +0000 |
|---|---|---|
| committer | Matthew Auld <matthew.auld@intel.com> | 2022-03-28 09:06:29 +0100 |
| commit | be658e705d08d14eb1b7803c89e6964b5d1c5c0a (patch) | |
| tree | e331d7c700125efb0e099aac878b88048150d451 | |
| parent | c0c73850637c6ad6a56a6b5ee181897cb35c6c31 (diff) | |
| download | lwn-be658e705d08d14eb1b7803c89e6964b5d1c5c0a.tar.gz lwn-be658e705d08d14eb1b7803c89e6964b5d1c5c0a.zip | |
drm/i915: add lmem_size modparam
lmem_size is used to limit the amount of lmem for testing purposes.
Default is to use hardware available lmem size.
Signed-off-by: CQ Tang <cq.tang@intel.com>
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Cc: Nirmoy Das <nirmoy.das@linux.intel.com>
Reviewed-by: Nirmoy Das <nirmoy.das@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220324143123.348590-2-matthew.auld@intel.com
| -rw-r--r-- | drivers/gpu/drm/i915/gt/intel_region_lmem.c | 4 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/i915_params.c | 3 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/i915_params.h | 1 |
3 files changed, 8 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/gt/intel_region_lmem.c b/drivers/gpu/drm/i915/gt/intel_region_lmem.c index 783d81072c3b..f5111c0a0060 100644 --- a/drivers/gpu/drm/i915/gt/intel_region_lmem.c +++ b/drivers/gpu/drm/i915/gt/intel_region_lmem.c @@ -123,6 +123,10 @@ static struct intel_memory_region *setup_lmem(struct intel_gt *gt) lmem_size = intel_uncore_read64(&i915->uncore, GEN12_GSMBASE); } + if (i915->params.lmem_size > 0) { + lmem_size = min_t(resource_size_t, lmem_size, + mul_u32_u32(i915->params.lmem_size, SZ_1M)); + } io_start = pci_resource_start(pdev, 2); io_size = min(pci_resource_len(pdev, 2), lmem_size); diff --git a/drivers/gpu/drm/i915/i915_params.c b/drivers/gpu/drm/i915/i915_params.c index eea355c2fc28..d898141cf208 100644 --- a/drivers/gpu/drm/i915/i915_params.c +++ b/drivers/gpu/drm/i915/i915_params.c @@ -200,6 +200,9 @@ i915_param_named_unsafe(request_timeout_ms, uint, 0600, "Default request/fence/batch buffer expiration timeout."); #endif +i915_param_named_unsafe(lmem_size, uint, 0400, + "Set the lmem size(in MiB) for each region. (default: 0, all memory)"); + static __always_inline void _print_param(struct drm_printer *p, const char *name, const char *type, diff --git a/drivers/gpu/drm/i915/i915_params.h b/drivers/gpu/drm/i915/i915_params.h index c779a6f85c7e..b5e7ea45d191 100644 --- a/drivers/gpu/drm/i915/i915_params.h +++ b/drivers/gpu/drm/i915/i915_params.h @@ -73,6 +73,7 @@ struct drm_printer; param(int, enable_dpcd_backlight, -1, 0600) \ param(char *, force_probe, CONFIG_DRM_I915_FORCE_PROBE, 0400) \ param(unsigned int, request_timeout_ms, CONFIG_DRM_I915_REQUEST_TIMEOUT, CONFIG_DRM_I915_REQUEST_TIMEOUT ? 0600 : 0) \ + param(unsigned int, lmem_size, 0, 0400) \ /* leave bools at the end to not create holes */ \ param(bool, enable_hangcheck, true, 0600) \ param(bool, load_detect_test, false, 0600) \ |