diff options
| author | Matthew Brost <matthew.brost@intel.com> | 2021-07-08 19:20:52 +0300 |
|---|---|---|
| committer | John Harrison <John.C.Harrison@Intel.com> | 2021-07-13 23:50:02 +0300 |
| commit | 1681924d8bdeb248451fd1d47c18648ffaeed625 (patch) | |
| tree | afe1f0c71543e585f6bc8b9df1a5130957af7a18 /drivers/gpu/drm/i915/gt/uc/intel_guc_ct.h | |
| parent | c26e289f1d8d5b8716f825ac5d798897aca5a124 (diff) | |
| download | linux-1681924d8bdeb248451fd1d47c18648ffaeed625.tar.xz | |
drm/i915/guc: Add non blocking CTB send function
Add non blocking CTB send function, intel_guc_send_nb. GuC submission
will send CTBs in the critical path and does not need to wait for these
CTBs to complete before moving on, hence the need for this new function.
The non-blocking CTB now must have a flow control mechanism to ensure
the buffer isn't overrun. A lazy spin wait is used as we believe the
flow control condition should be rare with a properly sized buffer.
The function, intel_guc_send_nb, is exported in this patch but unused.
Several patches later in the series make use of this function.
v2:
(Michal)
- Use define for H2G room calculations
- Move INTEL_GUC_SEND_NB define
(Daniel Vetter)
- Use msleep_interruptible rather than cond_resched
v3:
(Michal)
- Move includes to following patch
- s/INTEL_GUC_SEND_NB/INTEL_GUC_CT_SEND_NB/g
v4:
(John H)
- Update comment, add type local variable
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: John Harrison <John.C.Harrison@Intel.com>
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210708162055.129996-5-matthew.brost@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/gt/uc/intel_guc_ct.h')
| -rw-r--r-- | drivers/gpu/drm/i915/gt/uc/intel_guc_ct.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.h b/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.h index 1ae2dde6db93..5bb8bef024c8 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.h +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.h @@ -42,7 +42,6 @@ struct intel_guc_ct_buffer { bool broken; }; - /** Top-level structure for Command Transport related data * * Includes a pair of CT buffers for bi-directional communication and tracking @@ -87,8 +86,9 @@ static inline bool intel_guc_ct_enabled(struct intel_guc_ct *ct) return ct->enabled; } +#define INTEL_GUC_CT_SEND_NB BIT(31) int intel_guc_ct_send(struct intel_guc_ct *ct, const u32 *action, u32 len, - u32 *response_buf, u32 response_buf_size); + u32 *response_buf, u32 response_buf_size, u32 flags); void intel_guc_ct_event_handler(struct intel_guc_ct *ct); #endif /* _INTEL_GUC_CT_H_ */ |