Hi Niranjana, On Tue, Jan 17, 2023 at 11:15:48PM -0800, Niranjana Vishwanathapura wrote: > Add function __i915_sw_fence_await_reservation() for > asynchronous wait on a dma-resv object with specified > dma_resv_usage. This is required for async vma unbind > with vm_bind. > > Reviewed-by: Matthew Auld <[email protected]> > Signed-off-by: Niranjana Vishwanathapura <[email protected]>
Reviewed-by: Andi Shyti <[email protected]> Andi > --- > drivers/gpu/drm/i915/i915_sw_fence.c | 28 +++++++++++++++++++++------- > drivers/gpu/drm/i915/i915_sw_fence.h | 23 +++++++++++++++++------ > 2 files changed, 38 insertions(+), 13 deletions(-) > > diff --git a/drivers/gpu/drm/i915/i915_sw_fence.c > b/drivers/gpu/drm/i915/i915_sw_fence.c > index cc2a8821d22a..ae06d35db056 100644 > --- a/drivers/gpu/drm/i915/i915_sw_fence.c > +++ b/drivers/gpu/drm/i915/i915_sw_fence.c > @@ -7,7 +7,6 @@ > #include <linux/slab.h> > #include <linux/dma-fence.h> > #include <linux/irq_work.h> > -#include <linux/dma-resv.h> > > #include "i915_sw_fence.h" > #include "i915_selftest.h" > @@ -569,11 +568,26 @@ int __i915_sw_fence_await_dma_fence(struct > i915_sw_fence *fence, > return ret; > } > > -int i915_sw_fence_await_reservation(struct i915_sw_fence *fence, > - struct dma_resv *resv, > - bool write, > - unsigned long timeout, > - gfp_t gfp) > +/** > + * __i915_sw_fence_await_reservation() - Setup a fence to wait on a dma-resv > + * object with specified usage. > + * @fence: the fence that needs to wait > + * @resv: dma-resv object > + * @usage: dma_resv_usage (See enum dma_resv_usage) > + * @timeout: how long to wait in jiffies > + * @gfp: allocation mode > + * > + * Setup the @fence to asynchronously wait on dma-resv object @resv for > + * @usage to complete before signaling. > + * > + * Returns 0 if there is nothing to wait on, -ve error code upon error > + * and >0 upon successfully setting up the wait. > + */ > +int __i915_sw_fence_await_reservation(struct i915_sw_fence *fence, > + struct dma_resv *resv, > + enum dma_resv_usage usage, > + unsigned long timeout, > + gfp_t gfp) > { > struct dma_resv_iter cursor; > struct dma_fence *f; > @@ -582,7 +596,7 @@ int i915_sw_fence_await_reservation(struct i915_sw_fence > *fence, > debug_fence_assert(fence); > might_sleep_if(gfpflags_allow_blocking(gfp)); > > - dma_resv_iter_begin(&cursor, resv, dma_resv_usage_rw(write)); > + dma_resv_iter_begin(&cursor, resv, usage); > dma_resv_for_each_fence_unlocked(&cursor, f) { > pending = i915_sw_fence_await_dma_fence(fence, f, timeout, > gfp); > diff --git a/drivers/gpu/drm/i915/i915_sw_fence.h > b/drivers/gpu/drm/i915/i915_sw_fence.h > index f752bfc7c6e1..9c4859dc4c0d 100644 > --- a/drivers/gpu/drm/i915/i915_sw_fence.h > +++ b/drivers/gpu/drm/i915/i915_sw_fence.h > @@ -10,13 +10,13 @@ > #define _I915_SW_FENCE_H_ > > #include <linux/dma-fence.h> > +#include <linux/dma-resv.h> > #include <linux/gfp.h> > #include <linux/kref.h> > #include <linux/notifier.h> /* for NOTIFY_DONE */ > #include <linux/wait.h> > > struct completion; > -struct dma_resv; > struct i915_sw_fence; > > enum i915_sw_fence_notify { > @@ -89,11 +89,22 @@ int i915_sw_fence_await_dma_fence(struct i915_sw_fence > *fence, > unsigned long timeout, > gfp_t gfp); > > -int i915_sw_fence_await_reservation(struct i915_sw_fence *fence, > - struct dma_resv *resv, > - bool write, > - unsigned long timeout, > - gfp_t gfp); > +int __i915_sw_fence_await_reservation(struct i915_sw_fence *fence, > + struct dma_resv *resv, > + enum dma_resv_usage usage, > + unsigned long timeout, > + gfp_t gfp); > + > +static inline int i915_sw_fence_await_reservation(struct i915_sw_fence > *fence, > + struct dma_resv *resv, > + bool write, > + unsigned long timeout, > + gfp_t gfp) > +{ > + return __i915_sw_fence_await_reservation(fence, resv, > + dma_resv_usage_rw(write), > + timeout, gfp); > +} > > bool i915_sw_fence_await(struct i915_sw_fence *fence); > void i915_sw_fence_complete(struct i915_sw_fence *fence); > -- > 2.21.0.rc0.32.g243a4c7e27
