diff options
Diffstat (limited to 'drivers/gpu/drm/xe/xe_gsc_submit.c')
| -rw-r--r-- | drivers/gpu/drm/xe/xe_gsc_submit.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/drivers/gpu/drm/xe/xe_gsc_submit.c b/drivers/gpu/drm/xe/xe_gsc_submit.c index 8c5381e5913f..9ede483d37ef 100644 --- a/drivers/gpu/drm/xe/xe_gsc_submit.c +++ b/drivers/gpu/drm/xe/xe_gsc_submit.c @@ -5,7 +5,10 @@ #include "xe_gsc_submit.h" +#include <linux/poison.h> + #include "abi/gsc_command_header_abi.h" +#include "xe_assert.h" #include "xe_bb.h" #include "xe_exec_queue.h" #include "xe_gt_printk.h" @@ -39,6 +42,21 @@ gsc_to_gt(struct xe_gsc *gsc) } /** + * xe_gsc_create_host_session_id - Creates a random 64 bit host_session id with + * bits 56-63 masked. + * + * Returns: random host_session_id which can be used to send messages to gsc cs + */ +u64 xe_gsc_create_host_session_id(void) +{ + u64 host_session_id; + + get_random_bytes(&host_session_id, sizeof(u64)); + host_session_id &= ~HOST_SESSION_CLIENT_MASK; + return host_session_id; +} + +/** * xe_gsc_emit_header - write the MTL GSC header in memory * @xe: the Xe device * @map: the iosys map to write to @@ -69,6 +87,17 @@ u32 xe_gsc_emit_header(struct xe_device *xe, struct iosys_map *map, u32 offset, }; /** + * xe_gsc_poison_header - poison the MTL GSC header in memory + * @xe: the Xe device + * @map: the iosys map to write to + * @offset: offset from the start of the map at which the header resides + */ +void xe_gsc_poison_header(struct xe_device *xe, struct iosys_map *map, u32 offset) +{ + xe_map_memset(xe, map, offset, POISON_FREE, GSC_HDR_SIZE); +}; + +/** * xe_gsc_check_and_update_pending - check the pending bit and update the input * header with the retry handle from the output header * @xe: the Xe device @@ -112,11 +141,18 @@ int xe_gsc_read_out_header(struct xe_device *xe, { u32 marker = mtl_gsc_header_rd(xe, map, offset, validity_marker); u32 size = mtl_gsc_header_rd(xe, map, offset, message_size); + u32 status = mtl_gsc_header_rd(xe, map, offset, status); u32 payload_size = size - GSC_HDR_SIZE; if (marker != GSC_HECI_VALIDITY_MARKER) return -EPROTO; + if (status != 0) { + drm_err(&xe->drm, "GSC header readout indicates error: %d\n", + status); + return -EINVAL; + } + if (size < GSC_HDR_SIZE || payload_size < min_payload_size) return -ENODATA; |