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drm/i915: Reduce stack usage in debugfs due to SSEU 

sseu_dev_info is already a pretty large structure which will likely
continue to grow when future platforms increase potential DSS and EU
counts.  Let's switch the stack placement of this structure in debugfs
with a dynamic allocation.

Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220315020805.844962-1-matthew.d.roper@intel.com
This commit is contained in:
John Harrison 2022-03-14 19:08:05 -07:00 committed by Matt Roper
parent cc1338f259
commit 4dc3a1e52f
1 changed files with 14 additions and 8 deletions
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22
drivers/gpu/drm/i915/gt/intel_sseu_debugfs.c
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@ -246,7 +246,7 @@ int intel_sseu_status(struct seq_file *m, struct intel_gt *gt)
{
struct drm_i915_private *i915 = gt->i915;
const struct intel_gt_info *info = &gt->info;
struct sseu_dev_info sseu;
struct sseu_dev_info *sseu;
intel_wakeref_t wakeref;
if (GRAPHICS_VER(i915) < 8)
@ -256,23 +256,29 @@ int intel_sseu_status(struct seq_file *m, struct intel_gt *gt)
i915_print_sseu_info(m, true, HAS_POOLED_EU(i915), &info->sseu);
seq_puts(m, "SSEU Device Status\n");
memset(&sseu, 0, sizeof(sseu));
intel_sseu_set_info(&sseu, info->sseu.max_slices,
sseu = kzalloc(sizeof(*sseu), GFP_KERNEL);
if (!sseu)
return -ENOMEM;
intel_sseu_set_info(sseu, info->sseu.max_slices,
info->sseu.max_subslices,
info->sseu.max_eus_per_subslice);
with_intel_runtime_pm(&i915->runtime_pm, wakeref) {
if (IS_CHERRYVIEW(i915))
cherryview_sseu_device_status(gt, &sseu);
cherryview_sseu_device_status(gt, sseu);
else if (IS_BROADWELL(i915))
bdw_sseu_device_status(gt, &sseu);
bdw_sseu_device_status(gt, sseu);
else if (GRAPHICS_VER(i915) == 9)
gen9_sseu_device_status(gt, &sseu);
gen9_sseu_device_status(gt, sseu);
else if (GRAPHICS_VER(i915) >= 11)
gen11_sseu_device_status(gt, &sseu);
gen11_sseu_device_status(gt, sseu);
}
i915_print_sseu_info(m, false, HAS_POOLED_EU(i915), &sseu);
i915_print_sseu_info(m, false, HAS_POOLED_EU(i915), sseu);
kfree(sseu);
return 0;
}