diff options
| author | Wachowski, Karol <karol.wachowski@intel.com> | 2024-05-13 14:04:28 +0200 |
|---|---|---|
| committer | Jacek Lawrynowicz <jacek.lawrynowicz@linux.intel.com> | 2024-05-15 07:42:26 +0200 |
| commit | 2c3801b17459da806f44d3f63f89e999f23e9e60 (patch) | |
| tree | e54ec6feb7e0c69a56c4cf0668c8cedf65f0bc92 /drivers/accel/ivpu/ivpu_mmu.c | |
| parent | cdfad4db7756563db7d458216d9e3c2651dddc7d (diff) | |
accel/ivpu: Add force snoop module parameter
Add module parameter that enforces snooping for all NPU accesses,
both through MMU PTEs mappings and through TCU page table walk
override register bits for MMU page walks / configuration access.
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/20240513120431.3187212-10-jacek.lawrynowicz@linux.intel.com
Diffstat (limited to 'drivers/accel/ivpu/ivpu_mmu.c')
| -rw-r--r-- | drivers/accel/ivpu/ivpu_mmu.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/accel/ivpu/ivpu_mmu.c b/drivers/accel/ivpu/ivpu_mmu.c index 2e46b322c450..8682e6145520 100644 --- a/drivers/accel/ivpu/ivpu_mmu.c +++ b/drivers/accel/ivpu/ivpu_mmu.c @@ -519,7 +519,8 @@ static int ivpu_mmu_cmdq_sync(struct ivpu_device *vdev) if (ret) return ret; - clflush_cache_range(q->base, IVPU_MMU_CMDQ_SIZE); + if (!ivpu_is_force_snoop_enabled(vdev)) + clflush_cache_range(q->base, IVPU_MMU_CMDQ_SIZE); REGV_WR32(IVPU_MMU_REG_CMDQ_PROD, q->prod); ret = ivpu_mmu_cmdq_wait_for_cons(vdev); @@ -567,7 +568,8 @@ static int ivpu_mmu_reset(struct ivpu_device *vdev) int ret; memset(mmu->cmdq.base, 0, IVPU_MMU_CMDQ_SIZE); - clflush_cache_range(mmu->cmdq.base, IVPU_MMU_CMDQ_SIZE); + if (!ivpu_is_force_snoop_enabled(vdev)) + clflush_cache_range(mmu->cmdq.base, IVPU_MMU_CMDQ_SIZE); mmu->cmdq.prod = 0; mmu->cmdq.cons = 0; @@ -661,7 +663,8 @@ static void ivpu_mmu_strtab_link_cd(struct ivpu_device *vdev, u32 sid) WRITE_ONCE(entry[1], str[1]); WRITE_ONCE(entry[0], str[0]); - clflush_cache_range(entry, IVPU_MMU_STRTAB_ENT_SIZE); + if (!ivpu_is_force_snoop_enabled(vdev)) + clflush_cache_range(entry, IVPU_MMU_STRTAB_ENT_SIZE); ivpu_dbg(vdev, MMU, "STRTAB write entry (SSID=%u): 0x%llx, 0x%llx\n", sid, str[0], str[1]); } @@ -735,7 +738,8 @@ static int ivpu_mmu_cd_add(struct ivpu_device *vdev, u32 ssid, u64 cd_dma) WRITE_ONCE(entry[3], cd[3]); WRITE_ONCE(entry[0], cd[0]); - clflush_cache_range(entry, IVPU_MMU_CDTAB_ENT_SIZE); + if (!ivpu_is_force_snoop_enabled(vdev)) + clflush_cache_range(entry, IVPU_MMU_CDTAB_ENT_SIZE); ivpu_dbg(vdev, MMU, "CDTAB %s entry (SSID=%u, dma=%pad): 0x%llx, 0x%llx, 0x%llx, 0x%llx\n", cd_dma ? "write" : "clear", ssid, &cd_dma, cd[0], cd[1], cd[2], cd[3]); |