[igt-dev] [PATCH i-g-t 1/2] lib/xe/xe_spin: Integrate igt_spin_new with Xe.
Zbigniew Kempczyński
zbigniew.kempczynski at intel.com
Tue May 23 15:58:32 UTC 2023
On Mon, May 22, 2023 at 06:06:04PM +0530, sai.gowtham.ch at intel.com wrote:
> From: Sai Gowtham Ch <sai.gowtham.ch at intel.com>
>
> Extending the spin_create implementation and allocator handle support in xe,
> where it submits dummy work loads to engine. This Implementation is wrapped
> around vm_bind and unbind as we are supposed to do it manually for xe.
>
> Cc: Zbigniew Kempczyński <zbigniew.kempczynski at intel.com>
> Signed-off-by: Sai Gowtham Ch <sai.gowtham.ch at intel.com>
> ---
> lib/igt_dummyload.c | 24 ++++++++++++----
> lib/igt_dummyload.h | 11 ++++++++
> lib/xe/xe_spin.c | 68 +++++++++++++++++++++++++++++++++++++++++++++
> lib/xe/xe_spin.h | 7 +++++
> 4 files changed, 104 insertions(+), 6 deletions(-)
>
> diff --git a/lib/igt_dummyload.c b/lib/igt_dummyload.c
> index 740a58f3..6e89b72d 100644
> --- a/lib/igt_dummyload.c
> +++ b/lib/igt_dummyload.c
> @@ -46,6 +46,7 @@
> #include "intel_reg.h"
> #include "ioctl_wrappers.h"
> #include "sw_sync.h"
> +#include "xe/xe_spin.h"
>
> /**
> * SECTION:igt_dummyload
> @@ -447,7 +448,10 @@ spin_create(int fd, const struct igt_spin_factory *opts)
> igt_spin_t *
> __igt_spin_factory(int fd, const struct igt_spin_factory *opts)
> {
> - return spin_create(fd, opts);
> + if (is_xe_device(fd))
> + return xe_spin_create(fd, opts);
> + else
> + return spin_create(fd, opts);
> }
You may use enum intel_driver and cache what's the device underneath to
avoid this check in free path. See __intel_bb_create() as a reference.
>
> /**
> @@ -467,6 +471,11 @@ igt_spin_factory(int fd, const struct igt_spin_factory *opts)
> {
> igt_spin_t *spin;
>
> + if (is_xe_device(fd)) {
> + spin = xe_spin_create(fd, opts);
> + return spin;
> + }
> +
> if ((opts->flags & IGT_SPIN_POLL_RUN) && opts->engine != ALL_ENGINES) {
> unsigned int class;
>
> @@ -647,11 +656,14 @@ void igt_spin_free(int fd, igt_spin_t *spin)
> if (!spin)
> return;
>
> - pthread_mutex_lock(&list_lock);
> - igt_list_del(&spin->link);
> - pthread_mutex_unlock(&list_lock);
> -
> - __igt_spin_free(fd, spin);
> + if (is_xe_device(fd)) {
> + xe_spin_free(fd, spin);
> + } else {
> + pthread_mutex_lock(&list_lock);
> + igt_list_del(&spin->link);
> + pthread_mutex_unlock(&list_lock);
> + __igt_spin_free(fd, spin);
> + }
> }
>
> void igt_terminate_spins(void)
> diff --git a/lib/igt_dummyload.h b/lib/igt_dummyload.h
> index b247ab02..4da4e5a5 100644
> --- a/lib/igt_dummyload.h
> +++ b/lib/igt_dummyload.h
> @@ -51,8 +51,10 @@ typedef struct igt_spin_factory {
> uint32_t dependency;
> uint64_t dependency_size;
> unsigned int engine;
> + struct drm_xe_engine_class_instance *hwe;
> unsigned int flags;
> int fence;
> + uint32_t vm;
> uint64_t ahnd;
Keep xe arguments on the end.
> } igt_spin_factory_t;
>
> @@ -83,6 +85,15 @@ typedef struct igt_spin {
> #define SPIN_CLFLUSH (1 << 0)
>
> struct igt_spin_factory opts;
> +
> + uint32_t start;
> + uint32_t end;
> + size_t bo_size;
> + uint64_t address;
> + unsigned int engine;
> + uint32_t vm;
> + uint32_t syncobj;
> +
start and end are not necessary. Use struct xe_spin *xe_spin instead.
Other fields are ok.
> } igt_spin_t;
>
>
> diff --git a/lib/xe/xe_spin.c b/lib/xe/xe_spin.c
> index 856d0ba2..9a4fbeb8 100644
> --- a/lib/xe/xe_spin.c
> +++ b/lib/xe/xe_spin.c
> @@ -15,6 +15,7 @@
> #include "intel_reg.h"
> #include "xe_ioctl.h"
> #include "xe_spin.h"
> +#include "lib/igt_dummyload.h"
>
> /**
> * xe_spin_init:
> @@ -82,6 +83,73 @@ void xe_spin_end(struct xe_spin *spin)
> spin->end = 0;
> }
>
> +igt_spin_t *
> +xe_spin_create(int fd, const struct igt_spin_factory *opt)
> +{
> + size_t bo_size = xe_get_default_alignment(fd);
> + uint32_t bo;
> + uint64_t ahnd = opt->ahnd, addr;
> + struct igt_spin *spin;
> + struct xe_spin *xe_spin;
> + struct drm_xe_sync sync = {
> + .flags = DRM_XE_SYNC_SYNCOBJ | DRM_XE_SYNC_SIGNAL,
> + };
> + struct drm_xe_exec exec = {
> + .num_batch_buffer = 1,
> + .num_syncs = 1,
> + .syncs = to_user_pointer(&sync),
> + };
> +
> + igt_assert(ahnd);
> + xe_spin = calloc(1, sizeof(struct xe_spin));
> + igt_assert(xe_spin);
> + spin = calloc(1, sizeof(struct igt_spin));
> + igt_assert(spin);
> +
> + if (opt->engine) {
> + spin->engine = opt->engine;
> + spin->vm = opt->vm;
> + } else {
> + spin->vm = xe_vm_create(fd, 0, 0);
> + spin->engine = xe_engine_create(fd, spin->vm, opt->hwe, 0);
> + }
> +
> + bo = xe_bo_create(fd, opt->hwe->gt_id, spin->vm, bo_size);
> + spin->handle = bo;
> + spin->syncobj = syncobj_create(fd, 0);
> + addr = intel_allocator_alloc_with_strategy(ahnd, spin->handle, bo_size, 0, ALLOC_STRATEGY_LOW_TO_HIGH);
> + xe_vm_bind_sync(fd, spin->vm, spin->handle, 0, addr, bo_size);
> +
> + xe_spin_init(xe_spin, addr, true);
> + exec.engine_id = spin->engine;
> + exec.address = addr;
> + sync.handle = spin->syncobj;
> + igt_assert_eq(igt_ioctl(fd, DRM_IOCTL_XE_EXEC, &exec), 0);
> +
> + spin->batch = xe_spin->batch;
> + spin->start = xe_spin->start;
> + spin->end = xe_spin->end;
> + spin->bo_size = bo_size;
> + spin->address = addr;
Blank line here will make this code more readable.
> + return spin;
> +
And this blank line is unnecessary.
> +}
> +
> +void xe_spin_sync_wait(int fd, struct igt_spin *spin)
> +{
> + igt_assert(syncobj_wait(fd, &spin->syncobj, 1, INT64_MAX, 0,
> + NULL));
> +}
> +
> +void xe_spin_free(int fd, struct igt_spin *spin)
> +{
> + xe_vm_unbind_sync(fd, spin->vm, 0, spin->address, spin->bo_size);
> + spin->end = 0;
Are you really sure you want to unbind then stop the spinner?
And use xe_spin_end() for stopping the spinner.
> + syncobj_destroy(fd, spin->syncobj);
> + xe_engine_destroy(fd, spin->engine);
> + gem_close(fd, spin->handle);
Spin memory will leak here.
--
Zbigniew
> +}
> +
> void xe_cork_init(int fd, struct drm_xe_engine_class_instance *hwe,
> struct xe_cork *cork)
> {
> diff --git a/lib/xe/xe_spin.h b/lib/xe/xe_spin.h
> index 73f9a026..48867eb8 100644
> --- a/lib/xe/xe_spin.h
> +++ b/lib/xe/xe_spin.h
> @@ -13,19 +13,26 @@
> #include <stdbool.h>
>
> #include "xe_query.h"
> +#include "lib/igt_dummyload.h"
>
> /* Mapped GPU object */
> +
> struct xe_spin {
> uint32_t batch[16];
> uint64_t pad;
> uint32_t start;
> uint32_t end;
> +
> };
>
> +igt_spin_t *
> +xe_spin_create(int fd, const struct igt_spin_factory *opt);
> void xe_spin_init(struct xe_spin *spin, uint64_t addr, bool preempt);
> bool xe_spin_started(struct xe_spin *spin);
> +void xe_spin_sync_wait(int fd, struct igt_spin *spin);
> void xe_spin_wait_started(struct xe_spin *spin);
> void xe_spin_end(struct xe_spin *spin);
> +void xe_spin_free(int fd, struct igt_spin *spin);
>
> struct xe_cork {
> struct xe_spin *spin;
> --
> 2.39.1
>
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