diff options
| author | Lucas De Marchi <lucas.demarchi@intel.com> | 2022-02-07 23:01:40 -0800 |
|---|---|---|
| committer | Lucas De Marchi <lucas.demarchi@intel.com> | 2022-02-08 23:21:28 -0800 |
| commit | f4044ca1967098b44bd2d569ddb99352b599551e (patch) | |
| tree | 6f6908b05435b6f1b8da38603e7c9de1a9471ded /drivers/gpu/drm/i915/gt | |
| parent | 876f7a438e4247a948268ad77b67c494f709cc30 (diff) | |
drm/i915/guc: Prepare for error propagation
Currently guc_mmio_reg_add() relies on having enough memory available in
the array to add a new slot. It uses
`GEM_BUG_ON(count >= regset->size);` to protect going above the
threshold.
In order to allow guc_mmio_reg_add() to handle the memory allocation by
itself, it must return an error in case of failures. Adjust return code
so this error can be propagated to the callers of guc_mmio_reg_add() and
guc_mmio_regset_init().
No intended change in behavior.
Cc: Matt Roper <matthew.d.roper@intel.com>
Cc: John Harrison <John.C.Harrison@Intel.com>
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220208070141.2095177-2-lucas.demarchi@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/gt')
| -rw-r--r-- | drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c | 31 |
1 files changed, 18 insertions, 13 deletions
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c index aa767540ca2a..f163c929a6b3 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_ads.c @@ -224,8 +224,8 @@ static int guc_mmio_reg_cmp(const void *a, const void *b) return (int)ra->offset - (int)rb->offset; } -static void guc_mmio_reg_add(struct temp_regset *regset, - u32 offset, u32 flags) +static long __must_check guc_mmio_reg_add(struct temp_regset *regset, + u32 offset, u32 flags) { u32 count = regset->used; struct guc_mmio_reg reg = { @@ -244,7 +244,7 @@ static void guc_mmio_reg_add(struct temp_regset *regset, */ if (bsearch(®, regset->registers, count, sizeof(reg), guc_mmio_reg_cmp)) - return; + return 0; slot = ®set->registers[count]; regset->used++; @@ -257,6 +257,8 @@ static void guc_mmio_reg_add(struct temp_regset *regset, swap(slot[1], slot[0]); } + + return 0; } #define GUC_MMIO_REG_ADD(regset, reg, masked) \ @@ -264,32 +266,35 @@ static void guc_mmio_reg_add(struct temp_regset *regset, i915_mmio_reg_offset((reg)), \ (masked) ? GUC_REGSET_MASKED : 0) -static void guc_mmio_regset_init(struct temp_regset *regset, - struct intel_engine_cs *engine) +static int guc_mmio_regset_init(struct temp_regset *regset, + struct intel_engine_cs *engine) { const u32 base = engine->mmio_base; struct i915_wa_list *wal = &engine->wa_list; struct i915_wa *wa; unsigned int i; + int ret = 0; regset->used = 0; - GUC_MMIO_REG_ADD(regset, RING_MODE_GEN7(base), true); - GUC_MMIO_REG_ADD(regset, RING_HWS_PGA(base), false); - GUC_MMIO_REG_ADD(regset, RING_IMR(base), false); + ret |= GUC_MMIO_REG_ADD(regset, RING_MODE_GEN7(base), true); + ret |= GUC_MMIO_REG_ADD(regset, RING_HWS_PGA(base), false); + ret |= GUC_MMIO_REG_ADD(regset, RING_IMR(base), false); for (i = 0, wa = wal->list; i < wal->count; i++, wa++) - GUC_MMIO_REG_ADD(regset, wa->reg, wa->masked_reg); + ret |= GUC_MMIO_REG_ADD(regset, wa->reg, wa->masked_reg); /* Be extra paranoid and include all whitelist registers. */ for (i = 0; i < RING_MAX_NONPRIV_SLOTS; i++) - GUC_MMIO_REG_ADD(regset, - RING_FORCE_TO_NONPRIV(base, i), - false); + ret |= GUC_MMIO_REG_ADD(regset, + RING_FORCE_TO_NONPRIV(base, i), + false); /* add in local MOCS registers */ for (i = 0; i < GEN9_LNCFCMOCS_REG_COUNT; i++) - GUC_MMIO_REG_ADD(regset, GEN9_LNCFCMOCS(i), false); + ret |= GUC_MMIO_REG_ADD(regset, GEN9_LNCFCMOCS(i), false); + + return ret ? -1 : 0; } static int guc_mmio_reg_state_query(struct intel_guc *guc) |