diff options
| author | Yuri Nudelman <ynudelman@habana.ai> | 2021-10-25 11:37:25 +0300 |
|---|---|---|
| committer | Oded Gabbay <ogabbay@kernel.org> | 2021-12-26 08:59:04 +0200 |
| commit | 6ccba9a3bca95a24fd936e3c3542cf2ff2941b0f (patch) | |
| tree | c840e14b287d6308b81d09fc179237a5617dfd7b /drivers/misc/habanalabs/common/command_buffer.c | |
| parent | 82e5169e8adfff331169613808b45a6cfb030e81 (diff) | |
habanalabs: partly skip cache flush when in PMMU map flow
The PCI MMU cache is two layered. The upper layer, memcache, uses cache
lines, the bottom layer doesn't.
Hence, after PMMU map operation we have to invalidate memcache, to avoid
the situation where the new entry is already in the cache due to its
cache line being fully in the cache.
However, we do not have to invalidate the lower cache, and here we can
optimize, since cache invalidation is time consuming.
Signed-off-by: Yuri Nudelman <ynudelman@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
Diffstat (limited to 'drivers/misc/habanalabs/common/command_buffer.c')
| -rw-r--r-- | drivers/misc/habanalabs/common/command_buffer.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/misc/habanalabs/common/command_buffer.c b/drivers/misc/habanalabs/common/command_buffer.c index fab499d252d4..71910f7809bd 100644 --- a/drivers/misc/habanalabs/common/command_buffer.c +++ b/drivers/misc/habanalabs/common/command_buffer.c @@ -80,7 +80,8 @@ static int cb_map_mem(struct hl_ctx *ctx, struct hl_cb *cb) offset += va_block->size; } - hdev->asic_funcs->mmu_invalidate_cache(hdev, false, MMU_OP_USERPTR); + hdev->asic_funcs->mmu_invalidate_cache(hdev, false, + MMU_OP_USERPTR | MMU_OP_SKIP_LOW_CACHE_INV); mutex_unlock(&ctx->mmu_lock); |