From: Tvrtko Ursulin <[email protected]> We also need to support copying across file descriptors.
v2: * Copy over even if src is unset. (Chris) Signed-off-by: Tvrtko Ursulin <[email protected]> Cc: Chris Wilson <[email protected]> Cc: Sreedhar Telukuntla <[email protected]> Reviewed-by: Chris Wilson <[email protected]> --- lib/i915/gem_context.c | 30 ++++++++++++++++++++++++++++++ lib/i915/gem_context.h | 2 ++ 2 files changed, 32 insertions(+) diff --git a/lib/i915/gem_context.c b/lib/i915/gem_context.c index 0b6a554dfe27..50dfee3d1030 100644 --- a/lib/i915/gem_context.c +++ b/lib/i915/gem_context.c @@ -462,3 +462,33 @@ bool gem_context_has_engine(int fd, uint32_t ctx, uint64_t engine) return __gem_execbuf(fd, &execbuf) == -ENOENT; } + +/** + * gem_context_copy_engines: + * @src_fd: open i915 drm file descriptor where @src context belongs to + * @src: source engine map context id + * @dst_fd: open i915 drm file descriptor where @dst context belongs to + * @dst: destination engine map context id + * + * Special purpose helper for copying engine map from one context to another. + * + * In can be called regardless of whether the kernel supports context engine + * maps and is a no-op if not supported. + */ +void +gem_context_copy_engines(int src_fd, uint32_t src, int dst_fd, uint32_t dst) +{ + I915_DEFINE_CONTEXT_PARAM_ENGINES(engines, I915_EXEC_RING_MASK + 1); + struct drm_i915_gem_context_param param = { + .param = I915_CONTEXT_PARAM_ENGINES, + .ctx_id = src, + .size = sizeof(engines), + .value = to_user_pointer(&engines), + }; + + if (__gem_context_get_param(src_fd, ¶m)) + return; + + param.ctx_id = dst; + gem_context_set_param(dst_fd, ¶m); +} diff --git a/lib/i915/gem_context.h b/lib/i915/gem_context.h index cf2ba33fee8f..15e5db281b79 100644 --- a/lib/i915/gem_context.h +++ b/lib/i915/gem_context.h @@ -42,6 +42,8 @@ uint32_t gem_context_clone(int i915, uint32_t src, unsigned int share, unsigned int flags); uint32_t gem_context_clone_with_engines(int i915, uint32_t src); +void gem_context_copy_engines(int src_fd, uint32_t src, + int dst_fd, uint32_t dst); uint32_t gem_queue_create(int i915); uint32_t gem_queue_clone_with_engines(int i915, uint32_t src); -- 2.20.1 _______________________________________________ Intel-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/intel-gfx
