diff options
| -rw-r--r-- | drivers/gpu/drm/xe/xe_guc_ct.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/gpu/drm/xe/xe_guc_ct.c b/drivers/gpu/drm/xe/xe_guc_ct.c index beeeb120d1fc..f24dd5223926 100644 --- a/drivers/gpu/drm/xe/xe_guc_ct.c +++ b/drivers/gpu/drm/xe/xe_guc_ct.c @@ -105,12 +105,20 @@ ct_to_xe(struct xe_guc_ct *ct) * enough space to avoid backpressure on the driver. We increase the size * of the receive buffer (relative to the send) to ensure a G2H response * CTB has a landing spot. + * + * In addition to submissions, the G2H buffer needs to be able to hold + * enough space for recoverable page fault notifications. The number of + * page faults is interrupt driven and can be as much as the number of + * compute resources available. However, most of the actual work for these + * is in a separate page fault worker thread. Therefore we only need to + * make sure the queue has enough space to handle all of the submissions + * and responses and an extra buffer for incoming page faults. */ #define CTB_DESC_SIZE ALIGN(sizeof(struct guc_ct_buffer_desc), SZ_2K) #define CTB_H2G_BUFFER_SIZE (SZ_4K) -#define CTB_G2H_BUFFER_SIZE (4 * CTB_H2G_BUFFER_SIZE) -#define G2H_ROOM_BUFFER_SIZE (CTB_G2H_BUFFER_SIZE / 4) +#define CTB_G2H_BUFFER_SIZE (SZ_128K) +#define G2H_ROOM_BUFFER_SIZE (CTB_G2H_BUFFER_SIZE / 2) /** * xe_guc_ct_queue_proc_time_jiffies - Return maximum time to process a full |