diff options
| author | Ofir Bitton <obitton@habana.ai> | 2020-11-04 15:18:55 +0200 |
|---|---|---|
| committer | Oded Gabbay <ogabbay@kernel.org> | 2020-11-30 10:47:35 +0200 |
| commit | 412c41fcd526b239472a24974591a05227bf5225 (patch) | |
| tree | 97669f472ae7055527c56a047fb3655d4c48f916 /drivers/misc/habanalabs | |
| parent | b2d09622bec3f59bc51417ef672c105f3c5fc4d7 (diff) | |
habanalabs: support reserving aligned va block
Add support for reserving va block with alignment different than
page size. This is a pre-requisite for allocations needed in future
ASICs
Signed-off-by: Ofir Bitton <obitton@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
Diffstat (limited to 'drivers/misc/habanalabs')
| -rw-r--r-- | drivers/misc/habanalabs/common/habanalabs.h | 4 | ||||
| -rw-r--r-- | drivers/misc/habanalabs/common/memory.c | 8 | ||||
| -rw-r--r-- | drivers/misc/habanalabs/gaudi/gaudi.c | 3 |
3 files changed, 10 insertions, 5 deletions
diff --git a/drivers/misc/habanalabs/common/habanalabs.h b/drivers/misc/habanalabs/common/habanalabs.h index eeb78381177b..76ab9741895d 100644 --- a/drivers/misc/habanalabs/common/habanalabs.h +++ b/drivers/misc/habanalabs/common/habanalabs.h @@ -303,6 +303,8 @@ enum hl_device_hw_state { HL_DEVICE_HW_STATE_DIRTY }; +#define HL_MMU_VA_ALIGNMENT_NOT_NEEDED 0 + /** * struct hl_mmu_properties - ASIC specific MMU address translation properties. * @start_addr: virtual start address of the memory region. @@ -2112,7 +2114,7 @@ int hl_vm_init(struct hl_device *hdev); void hl_vm_fini(struct hl_device *hdev); u64 hl_reserve_va_block(struct hl_device *hdev, struct hl_ctx *ctx, - enum hl_va_range_type type, u32 size); + enum hl_va_range_type type, u32 size, u32 alignment); int hl_unreserve_va_block(struct hl_device *hdev, struct hl_ctx *ctx, u64 start_addr, u64 size); int hl_pin_host_memory(struct hl_device *hdev, u64 addr, u64 size, diff --git a/drivers/misc/habanalabs/common/memory.c b/drivers/misc/habanalabs/common/memory.c index f27ca80d3c3c..351c9927151f 100644 --- a/drivers/misc/habanalabs/common/memory.c +++ b/drivers/misc/habanalabs/common/memory.c @@ -626,18 +626,20 @@ out: * @ctx: current context * @type: virtual addresses range type. * @size: requested block size. + * @alignment: required alignment in bytes of the virtual block start address, + * 0 means no alignment. * * This function does the following: * - Iterate on the virtual block list to find a suitable virtual block for the - * given size. + * given size and alignment. * - Reserve the requested block and update the list. * - Return the start address of the virtual block. */ u64 hl_reserve_va_block(struct hl_device *hdev, struct hl_ctx *ctx, - enum hl_va_range_type type, u32 size) + enum hl_va_range_type type, u32 size, u32 alignment) { return get_va_block(hdev, ctx->va_range[type], size, 0, - ctx->va_range[type]->page_size); + max(alignment, ctx->va_range[type]->page_size)); } /** diff --git a/drivers/misc/habanalabs/gaudi/gaudi.c b/drivers/misc/habanalabs/gaudi/gaudi.c index f93809f7e3a0..4c884082be04 100644 --- a/drivers/misc/habanalabs/gaudi/gaudi.c +++ b/drivers/misc/habanalabs/gaudi/gaudi.c @@ -7791,7 +7791,8 @@ static int gaudi_internal_cb_pool_init(struct hl_device *hdev, } hdev->internal_cb_va_base = hl_reserve_va_block(hdev, ctx, - HL_VA_RANGE_TYPE_HOST, HOST_SPACE_INTERNAL_CB_SZ); + HL_VA_RANGE_TYPE_HOST, HOST_SPACE_INTERNAL_CB_SZ, + HL_MMU_VA_ALIGNMENT_NOT_NEEDED); if (!hdev->internal_cb_va_base) goto destroy_internal_cb_pool; |