diff options
author | Maarten Lankhorst <maarten.lankhorst@linux.intel.com> | 2020-08-19 16:08:57 +0200 |
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committer | Joonas Lahtinen <joonas.lahtinen@linux.intel.com> | 2020-09-07 14:31:36 +0300 |
commit | f00ecc2ef55861c3cbc3dde93c082b612114efdc (patch) | |
tree | ed4719d17ddc7446a53c30a6e303b8b6fe3748b7 /drivers/gpu/drm | |
parent | c8d225946a7803230ae48fead6652b6b5943233f (diff) | |
download | linux-f00ecc2ef55861c3cbc3dde93c082b612114efdc.tar.bz2 |
drm/i915: Convert i915_perf to ww locking as well
We have the ordering of timeline->mutex vs resv_lock wrong,
convert the i915_pin_vma and intel_context_pin as well to
future-proof this.
We may need to do future changes to do this more transaction-like,
and only get down to a single i915_gem_ww_ctx, but for now this
should work.
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: Thomas Hellström <thomas.hellstrom@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200819140904.1708856-18-maarten.lankhorst@linux.intel.com
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Diffstat (limited to 'drivers/gpu/drm')
-rw-r--r-- | drivers/gpu/drm/i915/i915_perf.c | 57 |
1 files changed, 42 insertions, 15 deletions
diff --git a/drivers/gpu/drm/i915/i915_perf.c b/drivers/gpu/drm/i915/i915_perf.c index c6f6370283cf..e94976976571 100644 --- a/drivers/gpu/drm/i915/i915_perf.c +++ b/drivers/gpu/drm/i915/i915_perf.c @@ -1195,24 +1195,39 @@ static struct intel_context *oa_pin_context(struct i915_perf_stream *stream) struct i915_gem_engines_iter it; struct i915_gem_context *ctx = stream->ctx; struct intel_context *ce; - int err; + struct i915_gem_ww_ctx ww; + int err = -ENODEV; for_each_gem_engine(ce, i915_gem_context_lock_engines(ctx), it) { if (ce->engine != stream->engine) /* first match! */ continue; - /* - * As the ID is the gtt offset of the context's vma we - * pin the vma to ensure the ID remains fixed. - */ - err = intel_context_pin(ce); - if (err == 0) { - stream->pinned_ctx = ce; - break; - } + err = 0; + break; } i915_gem_context_unlock_engines(ctx); + if (err) + return ERR_PTR(err); + + i915_gem_ww_ctx_init(&ww, true); +retry: + /* + * As the ID is the gtt offset of the context's vma we + * pin the vma to ensure the ID remains fixed. + */ + err = intel_context_pin_ww(ce, &ww); + if (err == -EDEADLK) { + err = i915_gem_ww_ctx_backoff(&ww); + if (!err) + goto retry; + } + i915_gem_ww_ctx_fini(&ww); + + if (err) + return ERR_PTR(err); + + stream->pinned_ctx = ce; return stream->pinned_ctx; } @@ -1923,15 +1938,22 @@ emit_oa_config(struct i915_perf_stream *stream, { struct i915_request *rq; struct i915_vma *vma; + struct i915_gem_ww_ctx ww; int err; vma = get_oa_vma(stream, oa_config); if (IS_ERR(vma)) return PTR_ERR(vma); - err = i915_vma_pin(vma, 0, 0, PIN_GLOBAL | PIN_HIGH); + i915_gem_ww_ctx_init(&ww, true); +retry: + err = i915_gem_object_lock(vma->obj, &ww); + if (err) + goto err; + + err = i915_vma_pin_ww(vma, &ww, 0, 0, PIN_GLOBAL | PIN_HIGH); if (err) - goto err_vma_put; + goto err; intel_engine_pm_get(ce->engine); rq = i915_request_create(ce); @@ -1953,11 +1975,9 @@ emit_oa_config(struct i915_perf_stream *stream, goto err_add_request; } - i915_vma_lock(vma); err = i915_request_await_object(rq, vma->obj, 0); if (!err) err = i915_vma_move_to_active(vma, rq, 0); - i915_vma_unlock(vma); if (err) goto err_add_request; @@ -1971,7 +1991,14 @@ err_add_request: i915_request_add(rq); err_vma_unpin: i915_vma_unpin(vma); -err_vma_put: +err: + if (err == -EDEADLK) { + err = i915_gem_ww_ctx_backoff(&ww); + if (!err) + goto retry; + } + + i915_gem_ww_ctx_fini(&ww); i915_vma_put(vma); return err; } |