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accel/ivpu: Force snooping for MMU writes

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Set AW_SNOOP_OVERRIDE bit in VPU_37/40XX_HOST_IF_TCU_PTW_OVERRIDES
to force snooping for MMU write accesses (setting event queue events).

MMU event queue buffer is the only buffer written by MMU and
mapped as write-back which break cache coherency. Force write
transactions to be snooped solving the problem.

Signed-off-by: Wachowski, Karol <karol.wachowski@intel.com>
Signed-off-by: Jacek Lawrynowicz <jacek.lawrynowicz@linux.intel.com>
Reviewed-by: Jeffrey Hugo <quic_jhugo@quicinc.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240126122804.2169129-2-jacek.lawrynowicz@linux.intel.com
This commit is contained in:
Wachowski, Karol 2024-01-26 13:27:58 +01:00 committed by Jacek Lawrynowicz
parent 34e659f34a
commit c9da9a1f17
3 changed files with 2 additions and 5 deletions
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2
drivers/accel/ivpu/ivpu_hw_37xx.c
View File

@ -525,7 +525,7 @@ static void ivpu_boot_no_snoop_enable(struct ivpu_device *vdev)
u32 val = REGV_RD32(VPU_37XX_HOST_IF_TCU_PTW_OVERRIDES);
val = REG_SET_FLD(VPU_37XX_HOST_IF_TCU_PTW_OVERRIDES, NOSNOOP_OVERRIDE_EN, val);
val = REG_SET_FLD(VPU_37XX_HOST_IF_TCU_PTW_OVERRIDES, AW_NOSNOOP_OVERRIDE, val);
val = REG_CLR_FLD(VPU_37XX_HOST_IF_TCU_PTW_OVERRIDES, AW_NOSNOOP_OVERRIDE, val);
val = REG_SET_FLD(VPU_37XX_HOST_IF_TCU_PTW_OVERRIDES, AR_NOSNOOP_OVERRIDE, val);
REGV_WR32(VPU_37XX_HOST_IF_TCU_PTW_OVERRIDES, val);

2
drivers/accel/ivpu/ivpu_hw_40xx.c
View File

@ -530,7 +530,7 @@ static void ivpu_boot_no_snoop_enable(struct ivpu_device *vdev)
u32 val = REGV_RD32(VPU_40XX_HOST_IF_TCU_PTW_OVERRIDES);
val = REG_SET_FLD(VPU_40XX_HOST_IF_TCU_PTW_OVERRIDES, SNOOP_OVERRIDE_EN, val);
val = REG_CLR_FLD(VPU_40XX_HOST_IF_TCU_PTW_OVERRIDES, AW_SNOOP_OVERRIDE, val);
val = REG_SET_FLD(VPU_40XX_HOST_IF_TCU_PTW_OVERRIDES, AW_SNOOP_OVERRIDE, val);
val = REG_CLR_FLD(VPU_40XX_HOST_IF_TCU_PTW_OVERRIDES, AR_SNOOP_OVERRIDE, val);
REGV_WR32(VPU_40XX_HOST_IF_TCU_PTW_OVERRIDES, val);

3
drivers/accel/ivpu/ivpu_mmu.c
View File

@ -560,7 +560,6 @@ static int ivpu_mmu_reset(struct ivpu_device *vdev)
mmu->cmdq.cons = 0;
memset(mmu->evtq.base, 0, IVPU_MMU_EVTQ_SIZE);
clflush_cache_range(mmu->evtq.base, IVPU_MMU_EVTQ_SIZE);
mmu->evtq.prod = 0;
mmu->evtq.cons = 0;
@ -877,8 +876,6 @@ static u32 *ivpu_mmu_get_event(struct ivpu_device *vdev)
if (!CIRC_CNT(IVPU_MMU_Q_IDX(evtq->prod), IVPU_MMU_Q_IDX(evtq->cons), IVPU_MMU_Q_COUNT))
return NULL;
clflush_cache_range(evt, IVPU_MMU_EVTQ_CMD_SIZE);
evtq->cons = (evtq->cons + 1) & IVPU_MMU_Q_WRAP_MASK;
REGV_WR32(IVPU_MMU_REG_EVTQ_CONS_SEC, evtq->cons);