The translation fetch operation (0x0A) fetches address translations for the
address range specified in the decriptor by issuing address translation
(ATS) requests to the IOMMU.
Add descriptor definitions for the operation so that user can use DSA
to accelerate translation fetch.
Signed-off-by: Fenghua Yu <[email protected]>
Reviewed-by: Dave Jiang <[email protected]>
---
include/uapi/linux/idxd.h | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/include/uapi/linux/idxd.h b/include/uapi/linux/idxd.h
index 34294d99c1cb..9de48c561452 100644
--- a/include/uapi/linux/idxd.h
+++ b/include/uapi/linux/idxd.h
@@ -71,6 +71,7 @@ enum dsa_opcode {
DSA_OPCODE_CR_DELTA,
DSA_OPCODE_AP_DELTA,
DSA_OPCODE_DUALCAST,
+ DSA_OPCODE_TRANSL_FETCH,
DSA_OPCODE_CRCGEN = 0x10,
DSA_OPCODE_COPY_CRC,
DSA_OPCODE_DIF_CHECK,
@@ -181,6 +182,7 @@ struct dsa_hw_desc {
uint64_t pattern;
uint64_t desc_list_addr;
uint64_t pattern_lower;
+ uint64_t transl_fetch_addr;
};
union {
uint64_t dst_addr;
@@ -191,6 +193,7 @@ struct dsa_hw_desc {
union {
uint32_t xfer_size;
uint32_t desc_count;
+ uint32_t region_size;
};
uint16_t int_handle;
uint16_t rsvd1;
@@ -250,6 +253,12 @@ struct dsa_hw_desc {
uint64_t pattern_upper;
};
+ /* Translation fetch */
+ struct {
+ uint64_t transl_fetch_res;
+ uint32_t region_stride;
+ };
+
/* DIX generate */
struct {
uint8_t dix_gen_res;
--
2.32.0