The Vulkan driver in Mesa for Intel hardware never uses relocations if it's running on a version of i915 that supports at least softpin which all versions of i915 supporting Gen12 do. On the OpenGL side, Gen12+ is only supported by iris which never uses relocations. The older i965 driver in Mesa does use relocations but it only supports Intel hardware through Gen11 and has been deprecated for all hardware Gen9+. The compute driver also never uses relocations. This only leaves the media driver which is supposed to be switching to softpin going forward. Making softpin a requirement for all future hardware seems reasonable.

There is one piece of hardware enabled by default in i915: RKL which was enabled by e22fa6f0a976 which has not yet landed in drm-next so this almost but not really a userspace API change for RKL. If it becomes a problem, we can always add !IS_ROCKETLAKE(eb->i915) to the condition.

Rejecting relocations starting with newer Gen12 platforms has the benefit that we don't have to bother supporting it on platforms with local memory. Given how much CPU touching of memory is required for relocations, not having to do so on platforms where not all memory is directly CPU-accessible carries significant advantages.

v2 (Jason Ekstrand): - Allow TGL-LP platforms as they've already shipped

v3 (Jason Ekstrand): - WARN_ON platforms with LMEM support in case the check is wrong

v4 (Jason Ekstrand): - Call out Rocket Lake in the commit message

v5 (Jason Ekstrand): - Drop the HAS_LMEM check as it's already covered by the version check

v6 (Jason Ekstrand): - Move the check to eb_validate_vma() with all the other exec_object validation checks.

Signed-off-by: Jason Ekstrand jason@jlekstrand.net Reviewed-by: Zbigniew Kempczyński zbigniew.kempczynski@intel.com Reviewed-by: Maarten Lankhorst maarten.lankhorst@linux.intel.com --- drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c | 7 +++++++ 1 file changed, 7 insertions(+)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c index 99772f37bff60..c082fb0bef330 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c @@ -483,6 +483,13 @@ eb_validate_vma(struct i915_execbuffer *eb, struct drm_i915_gem_exec_object2 *entry, struct i915_vma *vma) { + /* Relocations are disallowed for all platforms after TGL-LP. This + * also covers all platforms with local memory. + */ + if (entry->relocation_count && + INTEL_GEN(eb->i915) >= 12 && !IS_TIGERLAKE(eb->i915)) + return -EINVAL; + if (unlikely(entry->flags & eb->invalid_flags)) return -EINVAL;

On Wed, Mar 17, 2021 at 09:41:46AM -0500, Jason Ekstrand wrote:

I should probably have said that the reviews are on v5 and it's very different in v6 so they should probably be considered dropped until re-confirmed.

You're checking relocation_count early in do_execbuffer() so imo there's no option to pass execbuf with relocations now.

I keep my r-b.

-- Zbigniew

On Wed, Mar 17, 2021 at 9:39 AM Jason Ekstrand jason@jlekstrand.net wrote:

...

The Vulkan driver in Mesa for Intel hardware never uses relocations if it's running on a version of i915 that supports at least softpin which all versions of i915 supporting Gen12 do. On the OpenGL side, Gen12+ is only supported by iris which never uses relocations. The older i965 driver in Mesa does use relocations but it only supports Intel hardware through Gen11 and has been deprecated for all hardware Gen9+. The compute driver also never uses relocations. This only leaves the media driver which is supposed to be switching to softpin going forward. Making softpin a requirement for all future hardware seems reasonable.

There is one piece of hardware enabled by default in i915: RKL which was enabled by e22fa6f0a976 which has not yet landed in drm-next so this almost but not really a userspace API change for RKL. If it becomes a problem, we can always add !IS_ROCKETLAKE(eb->i915) to the condition.

Rejecting relocations starting with newer Gen12 platforms has the benefit that we don't have to bother supporting it on platforms with local memory. Given how much CPU touching of memory is required for relocations, not having to do so on platforms where not all memory is directly CPU-accessible carries significant advantages.

v2 (Jason Ekstrand):

• Allow TGL-LP platforms as they've already shipped

v3 (Jason Ekstrand):

• WARN_ON platforms with LMEM support in case the check is wrong

v4 (Jason Ekstrand):

• Call out Rocket Lake in the commit message

v5 (Jason Ekstrand):

• Drop the HAS_LMEM check as it's already covered by the version check

v6 (Jason Ekstrand):

• Move the check to eb_validate_vma() with all the other exec_object validation checks.

Signed-off-by: Jason Ekstrand jason@jlekstrand.net Reviewed-by: Zbigniew Kempczyński zbigniew.kempczynski@intel.com Reviewed-by: Maarten Lankhorst maarten.lankhorst@linux.intel.com

---

drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c | 7 +++++++ 1 file changed, 7 insertions(+)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c index 99772f37bff60..c082fb0bef330 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c @@ -483,6 +483,13 @@ eb_validate_vma(struct i915_execbuffer *eb, struct drm_i915_gem_exec_object2 *entry, struct i915_vma *vma) {

•   /* Relocations are disallowed for all platforms after TGL-LP.  This
  

•    * also covers all platforms with local memory.
  

•    */
  

•   if (entry->relocation_count &&
  

•       INTEL_GEN(eb->i915) >= 12 && !IS_TIGERLAKE(eb->i915))
  

•           return -EINVAL;
  

•   if (unlikely(entry->flags & eb->invalid_flags))
            return -EINVAL;
  
  

-- 2.29.2

libdrm has supported the newer execbuffer2 ioctl and using it by default when it exists since libdrm commit b50964027bef which landed Mar 2, 2010. The i915 and i965 drivers in Mesa at the time both used libdrm and so did the Intel X11 back-end. The SNA back-end for X11 has always used execbuffer2.

v2 (Jason Ekstrand): - Add a comment saying what Linux version it's being removed in.

Signed-off-by: Jason Ekstrand jason@jlekstrand.net Acked-by: Keith Packard keithp@keithp.com Acked-by: Dave Airlie airlied@redhat.com --- .../gpu/drm/i915/gem/i915_gem_execbuffer.c | 100 ------------------ drivers/gpu/drm/i915/gem/i915_gem_ioctls.h | 2 - drivers/gpu/drm/i915/i915_drv.c | 2 +- include/uapi/drm/i915_drm.h | 1 + 4 files changed, 2 insertions(+), 103 deletions(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c index fe170186dd428..99772f37bff60 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c @@ -3394,106 +3394,6 @@ static bool check_buffer_count(size_t count) return !(count < 1 || count > INT_MAX || count > SIZE_MAX / sz - 1); }

-/* - * Legacy execbuffer just creates an exec2 list from the original exec object - * list array and passes it to the real function. - */ -int -i915_gem_execbuffer_ioctl(struct drm_device *dev, void *data, - struct drm_file *file) -{ - struct drm_i915_private *i915 = to_i915(dev); - struct drm_i915_gem_execbuffer *args = data; - struct drm_i915_gem_execbuffer2 exec2; - struct drm_i915_gem_exec_object *exec_list = NULL; - struct drm_i915_gem_exec_object2 *exec2_list = NULL; - const size_t count = args->buffer_count; - unsigned int i; - int err; - - if (!check_buffer_count(count)) { - drm_dbg(&i915->drm, "execbuf2 with %zd buffers\n", count); - return -EINVAL; - } - - exec2.buffers_ptr = args->buffers_ptr; - exec2.buffer_count = args->buffer_count; - exec2.batch_start_offset = args->batch_start_offset; - exec2.batch_len = args->batch_len; - exec2.DR1 = args->DR1; - exec2.DR4 = args->DR4; - exec2.num_cliprects = args->num_cliprects; - exec2.cliprects_ptr = args->cliprects_ptr; - exec2.flags = I915_EXEC_RENDER; - i915_execbuffer2_set_context_id(exec2, 0); - - err = i915_gem_check_execbuffer(&exec2); - if (err) - return err; - - /* Copy in the exec list from userland */ - exec_list = kvmalloc_array(count, sizeof(*exec_list), - __GFP_NOWARN | GFP_KERNEL); - - /* Allocate extra slots for use by the command parser */ - exec2_list = kvmalloc_array(count + 2, eb_element_size(), - __GFP_NOWARN | GFP_KERNEL); - if (exec_list == NULL || exec2_list == NULL) { - drm_dbg(&i915->drm, - "Failed to allocate exec list for %d buffers\n", - args->buffer_count); - kvfree(exec_list); - kvfree(exec2_list); - return -ENOMEM; - } - err = copy_from_user(exec_list, - u64_to_user_ptr(args->buffers_ptr), - sizeof(*exec_list) * count); - if (err) { - drm_dbg(&i915->drm, "copy %d exec entries failed %d\n", - args->buffer_count, err); - kvfree(exec_list); - kvfree(exec2_list); - return -EFAULT; - } - - for (i = 0; i < args->buffer_count; i++) { - exec2_list[i].handle = exec_list[i].handle; - exec2_list[i].relocation_count = exec_list[i].relocation_count; - exec2_list[i].relocs_ptr = exec_list[i].relocs_ptr; - exec2_list[i].alignment = exec_list[i].alignment; - exec2_list[i].offset = exec_list[i].offset; - if (INTEL_GEN(to_i915(dev)) < 4) - exec2_list[i].flags = EXEC_OBJECT_NEEDS_FENCE; - else - exec2_list[i].flags = 0; - } - - err = i915_gem_do_execbuffer(dev, file, &exec2, exec2_list); - if (exec2.flags & __EXEC_HAS_RELOC) { - struct drm_i915_gem_exec_object __user *user_exec_list = - u64_to_user_ptr(args->buffers_ptr); - - /* Copy the new buffer offsets back to the user's exec list. */ - for (i = 0; i < args->buffer_count; i++) { - if (!(exec2_list[i].offset & UPDATE)) - continue; - - exec2_list[i].offset = - gen8_canonical_addr(exec2_list[i].offset & PIN_OFFSET_MASK); - exec2_list[i].offset &= PIN_OFFSET_MASK; - if (__copy_to_user(&user_exec_list[i].offset, - &exec2_list[i].offset, - sizeof(user_exec_list[i].offset))) - break; - } - } - - kvfree(exec_list); - kvfree(exec2_list); - return err; -} - int i915_gem_execbuffer2_ioctl(struct drm_device *dev, void *data, struct drm_file *file) diff --git a/drivers/gpu/drm/i915/gem/i915_gem_ioctls.h b/drivers/gpu/drm/i915/gem/i915_gem_ioctls.h index 87d8b27f426de..7fd22f3efbef0 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_ioctls.h +++ b/drivers/gpu/drm/i915/gem/i915_gem_ioctls.h @@ -14,8 +14,6 @@ int i915_gem_busy_ioctl(struct drm_device *dev, void *data, struct drm_file *file); int i915_gem_create_ioctl(struct drm_device *dev, void *data, struct drm_file *file); -int i915_gem_execbuffer_ioctl(struct drm_device *dev, void *data, - struct drm_file *file); int i915_gem_execbuffer2_ioctl(struct drm_device *dev, void *data, struct drm_file *file); int i915_gem_get_aperture_ioctl(struct drm_device *dev, void *data, diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index 3edd5e47ad682..64edcab59fe12 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -1701,7 +1701,7 @@ static const struct drm_ioctl_desc i915_ioctls[] = { DRM_IOCTL_DEF_DRV(I915_VBLANK_SWAP, drm_noop, DRM_AUTH), DRM_IOCTL_DEF_DRV(I915_HWS_ADDR, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF_DRV(I915_GEM_INIT, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), - DRM_IOCTL_DEF_DRV(I915_GEM_EXECBUFFER, i915_gem_execbuffer_ioctl, DRM_AUTH), + DRM_IOCTL_DEF_DRV(I915_GEM_EXECBUFFER, drm_invalid_op, DRM_AUTH), DRM_IOCTL_DEF_DRV(I915_GEM_EXECBUFFER2_WR, i915_gem_execbuffer2_ioctl, DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_PIN, i915_gem_reject_pin_ioctl, DRM_AUTH|DRM_ROOT_ONLY), DRM_IOCTL_DEF_DRV(I915_GEM_UNPIN, i915_gem_reject_pin_ioctl, DRM_AUTH|DRM_ROOT_ONLY), diff --git a/include/uapi/drm/i915_drm.h b/include/uapi/drm/i915_drm.h index 1987e2ea79a3b..ddc47bbf48b6d 100644 --- a/include/uapi/drm/i915_drm.h +++ b/include/uapi/drm/i915_drm.h @@ -943,6 +943,7 @@ struct drm_i915_gem_exec_object { __u64 offset; };

+/* DRM_IOCTL_I915_GEM_EXECBUFFER was removed in Linux 5.13 */ struct drm_i915_gem_execbuffer { /** * List of buffers to be validated with their relocations to be

From: Ashutosh Dixit ashutosh.dixit@intel.com

The rationale for this change is roughly as follows:

1. The functionality can be done entirely in userspace with a combination of mmap + memcpy

2. The only reason anyone in userspace is still using it is because someone implemented bo_subdata that way in libdrm ages ago and they're all too lazy to write the 5 lines of code to do a map.

3. This falls cleanly into the category of things which will only get more painful with local memory support.

These ioctls aren't used much anymore by "real" userspace drivers. Vulkan has never used them and neither has the iris GL driver. The old i965 GL driver does use PWRITE for glBufferSubData but it only supports up through Gen11; Gen12 was never enabled in i965. The compute driver has never used PREAD/PWRITE. The only remaining user is the media driver which uses it exactly twice and they're easily removed [1] so expecting them to drop it going forward is reasonable.

IGT changes which handle this kernel change have also been submitted [2].

[1] https://github.com/intel/media-driver/pull/1160 [2] https://patchwork.freedesktop.org/series/81384/

v2 (Jason Ekstrand): - Improved commit message with the status of all usermode drivers - A more future-proof platform check

v3 (Jason Ekstrand): - Drop the HAS_LMEM checks as they're already covered by the version checks

Signed-off-by: Ashutosh Dixit ashutosh.dixit@intel.com Signed-off-by: Jason Ekstrand jason@jlekstrand.net Reviewed-by: Jason Ekstrand jason@jlekstrand.net --- drivers/gpu/drm/i915/i915_gem.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index b2e3b5cfccb4a..80915467e0d84 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -374,10 +374,17 @@ int i915_gem_pread_ioctl(struct drm_device *dev, void *data, struct drm_file *file) { + struct drm_i915_private *i915 = to_i915(dev); struct drm_i915_gem_pread *args = data; struct drm_i915_gem_object *obj; int ret;

+ /* PREAD is disallowed for all platforms after TGL-LP. This also + * covers all platforms with local memory. + */ + if (INTEL_GEN(i915) >= 12 && !IS_TIGERLAKE(i915)) + return -EOPNOTSUPP; + if (args->size == 0) return 0;

@@ -675,10 +682,17 @@ int i915_gem_pwrite_ioctl(struct drm_device *dev, void *data, struct drm_file *file) { + struct drm_i915_private *i915 = to_i915(dev); struct drm_i915_gem_pwrite *args = data; struct drm_i915_gem_object *obj; int ret;

+ /* PWRITE is disallowed for all platforms after TGL-LP. This also + * covers all platforms with local memory. + */ + if (INTEL_GEN(i915) >= 12 && !IS_TIGERLAKE(i915)) + return -EOPNOTSUPP; + if (args->size == 0) return 0;

It's never been used by any real userspace. It's used by IGT as a short-cut for sharing VMs and other stuff between contexts.

Signed-off-by: Jason Ekstrand jason@jlekstrand.net Cc: Tvrtko Ursulin tvrtko.ursulin@intel.com --- drivers/gpu/drm/i915/gem/i915_gem_context.c | 217 +------------------- include/uapi/drm/i915_drm.h | 16 +- 2 files changed, 6 insertions(+), 227 deletions(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_context.c b/drivers/gpu/drm/i915/gem/i915_gem_context.c index ca37d93ef5e78..92256f4e50764 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_context.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_context.c @@ -2103,225 +2103,14 @@ static int create_setparam(struct i915_user_extension __user *ext, void *data) return ctx_setparam(arg->fpriv, arg->ctx, &local.param); }

-static int copy_ring_size(struct intel_context *dst, - struct intel_context *src) +static int invalid_ext(struct i915_user_extension __user *ext, void *data) { - long sz; - - sz = intel_context_get_ring_size(src); - if (sz < 0) - return sz; - - return intel_context_set_ring_size(dst, sz); -} - -static int clone_engines(struct i915_gem_context *dst, - struct i915_gem_context *src) -{ - struct i915_gem_engines *clone, *e; - bool user_engines; - unsigned long n; - - e = __context_engines_await(src, &user_engines); - if (!e) - return -ENOENT; - - clone = alloc_engines(e->num_engines); - if (!clone) - goto err_unlock; - - for (n = 0; n < e->num_engines; n++) { - struct intel_engine_cs *engine; - - if (!e->engines[n]) { - clone->engines[n] = NULL; - continue; - } - engine = e->engines[n]->engine; - - /* - * Virtual engines are singletons; they can only exist - * inside a single context, because they embed their - * HW context... As each virtual context implies a single - * timeline (each engine can only dequeue a single request - * at any time), it would be surprising for two contexts - * to use the same engine. So let's create a copy of - * the virtual engine instead. - */ - if (intel_engine_is_virtual(engine)) - clone->engines[n] = - intel_execlists_clone_virtual(engine); - else - clone->engines[n] = intel_context_create(engine); - if (IS_ERR_OR_NULL(clone->engines[n])) { - __free_engines(clone, n); - goto err_unlock; - } - - intel_context_set_gem(clone->engines[n], dst); - - /* Copy across the preferred ringsize */ - if (copy_ring_size(clone->engines[n], e->engines[n])) { - __free_engines(clone, n + 1); - goto err_unlock; - } - } - clone->num_engines = n; - i915_sw_fence_complete(&e->fence); - - /* Serialised by constructor */ - engines_idle_release(dst, rcu_replace_pointer(dst->engines, clone, 1)); - if (user_engines) - i915_gem_context_set_user_engines(dst); - else - i915_gem_context_clear_user_engines(dst); - return 0; - -err_unlock: - i915_sw_fence_complete(&e->fence); - return -ENOMEM; -} - -static int clone_flags(struct i915_gem_context *dst, - struct i915_gem_context *src) -{ - dst->user_flags = src->user_flags; - return 0; -} - -static int clone_schedattr(struct i915_gem_context *dst, - struct i915_gem_context *src) -{ - dst->sched = src->sched; - return 0; -} - -static int clone_sseu(struct i915_gem_context *dst, - struct i915_gem_context *src) -{ - struct i915_gem_engines *e = i915_gem_context_lock_engines(src); - struct i915_gem_engines *clone; - unsigned long n; - int err; - - /* no locking required; sole access under constructor*/ - clone = __context_engines_static(dst); - if (e->num_engines != clone->num_engines) { - err = -EINVAL; - goto unlock; - } - - for (n = 0; n < e->num_engines; n++) { - struct intel_context *ce = e->engines[n]; - - if (clone->engines[n]->engine->class != ce->engine->class) { - /* Must have compatible engine maps! */ - err = -EINVAL; - goto unlock; - } - - /* serialises with set_sseu */ - err = intel_context_lock_pinned(ce); - if (err) - goto unlock; - - clone->engines[n]->sseu = ce->sseu; - intel_context_unlock_pinned(ce); - } - - err = 0; -unlock: - i915_gem_context_unlock_engines(src); - return err; -} - -static int clone_timeline(struct i915_gem_context *dst, - struct i915_gem_context *src) -{ - if (src->timeline) - __assign_timeline(dst, src->timeline); - - return 0; -} - -static int clone_vm(struct i915_gem_context *dst, - struct i915_gem_context *src) -{ - struct i915_address_space *vm; - int err = 0; - - if (!rcu_access_pointer(src->vm)) - return 0; - - rcu_read_lock(); - vm = context_get_vm_rcu(src); - rcu_read_unlock(); - - if (!mutex_lock_interruptible(&dst->mutex)) { - __assign_ppgtt(dst, vm); - mutex_unlock(&dst->mutex); - } else { - err = -EINTR; - } - - i915_vm_put(vm); - return err; -} - -static int create_clone(struct i915_user_extension __user *ext, void *data) -{ - static int (* const fn[])(struct i915_gem_context *dst, - struct i915_gem_context *src) = { -#define MAP(x, y) [ilog2(I915_CONTEXT_CLONE_##x)] = y - MAP(ENGINES, clone_engines), - MAP(FLAGS, clone_flags), - MAP(SCHEDATTR, clone_schedattr), - MAP(SSEU, clone_sseu), - MAP(TIMELINE, clone_timeline), - MAP(VM, clone_vm), -#undef MAP - }; - struct drm_i915_gem_context_create_ext_clone local; - const struct create_ext *arg = data; - struct i915_gem_context *dst = arg->ctx; - struct i915_gem_context *src; - int err, bit; - - if (copy_from_user(&local, ext, sizeof(local))) - return -EFAULT; - - BUILD_BUG_ON(GENMASK(BITS_PER_TYPE(local.flags) - 1, ARRAY_SIZE(fn)) != - I915_CONTEXT_CLONE_UNKNOWN); - - if (local.flags & I915_CONTEXT_CLONE_UNKNOWN) - return -EINVAL; - - if (local.rsvd) - return -EINVAL; - - rcu_read_lock(); - src = __i915_gem_context_lookup_rcu(arg->fpriv, local.clone_id); - rcu_read_unlock(); - if (!src) - return -ENOENT; - - GEM_BUG_ON(src == dst); - - for (bit = 0; bit < ARRAY_SIZE(fn); bit++) { - if (!(local.flags & BIT(bit))) - continue; - - err = fn[bit](dst, src); - if (err) - return err; - } - - return 0; + return -EINVAL; }

static const i915_user_extension_fn create_extensions[] = { [I915_CONTEXT_CREATE_EXT_SETPARAM] = create_setparam, - [I915_CONTEXT_CREATE_EXT_CLONE] = create_clone, + [I915_CONTEXT_CREATE_EXT_CLONE] = invalid_ext, };

static bool client_is_banned(struct drm_i915_file_private *file_priv) diff --git a/include/uapi/drm/i915_drm.h b/include/uapi/drm/i915_drm.h index ddc47bbf48b6d..0ed1b88afedd5 100644 --- a/include/uapi/drm/i915_drm.h +++ b/include/uapi/drm/i915_drm.h @@ -1853,20 +1853,10 @@ struct drm_i915_gem_context_create_ext_setparam { struct drm_i915_gem_context_param param; };

-struct drm_i915_gem_context_create_ext_clone { +/* This API has been removed. On the off chance someone somewhere has + * attempted to use it, never re-use this extension number. + */ #define I915_CONTEXT_CREATE_EXT_CLONE 1 - struct i915_user_extension base; - __u32 clone_id; - __u32 flags; -#define I915_CONTEXT_CLONE_ENGINES (1u << 0) -#define I915_CONTEXT_CLONE_FLAGS (1u << 1) -#define I915_CONTEXT_CLONE_SCHEDATTR (1u << 2) -#define I915_CONTEXT_CLONE_SSEU (1u << 3) -#define I915_CONTEXT_CLONE_TIMELINE (1u << 4) -#define I915_CONTEXT_CLONE_VM (1u << 5) -#define I915_CONTEXT_CLONE_UNKNOWN -(I915_CONTEXT_CLONE_VM << 1) - __u64 rsvd; -};

struct drm_i915_gem_context_destroy { __u32 ctx_id;

This reverts commit 88be76cdafc7e60e2e4ed883bfe7e8dd7f35fa3a. This API has never been used by any real userspace.

Signed-off-by: Jason Ekstrand jason@jlekstrand.net --- drivers/gpu/drm/i915/Makefile | 1 - drivers/gpu/drm/i915/gem/i915_gem_context.c | 94 ++----------------- drivers/gpu/drm/i915/gt/intel_context_param.c | 63 ------------- drivers/gpu/drm/i915/gt/intel_context_param.h | 14 --- drivers/gpu/drm/i915/gt/intel_lrc.c | 1 - include/uapi/drm/i915_drm.h | 20 +--- 6 files changed, 12 insertions(+), 181 deletions(-) delete mode 100644 drivers/gpu/drm/i915/gt/intel_context_param.c delete mode 100644 drivers/gpu/drm/i915/gt/intel_context_param.h

diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile index bc6138880c67c..c207735fb6579 100644 --- a/drivers/gpu/drm/i915/Makefile +++ b/drivers/gpu/drm/i915/Makefile @@ -88,7 +88,6 @@ gt-y += \ gt/gen8_ppgtt.o \ gt/intel_breadcrumbs.o \ gt/intel_context.o \ - gt/intel_context_param.o \ gt/intel_context_sseu.o \ gt/intel_engine_cs.o \ gt/intel_engine_heartbeat.o \ diff --git a/drivers/gpu/drm/i915/gem/i915_gem_context.c b/drivers/gpu/drm/i915/gem/i915_gem_context.c index 92256f4e50764..80fa7e249f746 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_context.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_context.c @@ -69,7 +69,6 @@

#include "gt/gen6_ppgtt.h" #include "gt/intel_context.h" -#include "gt/intel_context_param.h" #include "gt/intel_engine_heartbeat.h" #include "gt/intel_engine_user.h" #include "gt/intel_execlists_submission.h" /* virtual_engine */ @@ -774,32 +773,25 @@ __context_engines_await(const struct i915_gem_context *ctx, return engines; }

-static int +static void context_apply_all(struct i915_gem_context *ctx, - int (*fn)(struct intel_context *ce, void *data), + void (*fn)(struct intel_context *ce, void *data), void *data) { struct i915_gem_engines_iter it; struct i915_gem_engines *e; struct intel_context *ce; - int err = 0;

e = __context_engines_await(ctx, NULL); - for_each_gem_engine(ce, e, it) { - err = fn(ce, data); - if (err) - break; - } + for_each_gem_engine(ce, e, it) + fn(ce, data); i915_sw_fence_complete(&e->fence); - - return err; }

-static int __apply_ppgtt(struct intel_context *ce, void *vm) +static void __apply_ppgtt(struct intel_context *ce, void *vm) { i915_vm_put(ce->vm); ce->vm = i915_vm_get(vm); - return 0; }

static struct i915_address_space * @@ -839,10 +831,9 @@ static void __set_timeline(struct intel_timeline **dst, intel_timeline_put(old); }

-static int __apply_timeline(struct intel_context *ce, void *timeline) +static void __apply_timeline(struct intel_context *ce, void *timeline) { __set_timeline(&ce->timeline, timeline); - return 0; }

static void __assign_timeline(struct i915_gem_context *ctx, @@ -1369,63 +1360,6 @@ static int set_ppgtt(struct drm_i915_file_private *file_priv, return err; }

-static int __apply_ringsize(struct intel_context *ce, void *sz) -{ - return intel_context_set_ring_size(ce, (unsigned long)sz); -} - -static int set_ringsize(struct i915_gem_context *ctx, - struct drm_i915_gem_context_param *args) -{ - if (!HAS_LOGICAL_RING_CONTEXTS(ctx->i915)) - return -ENODEV; - - if (args->size) - return -EINVAL; - - if (!IS_ALIGNED(args->value, I915_GTT_PAGE_SIZE)) - return -EINVAL; - - if (args->value < I915_GTT_PAGE_SIZE) - return -EINVAL; - - if (args->value > 128 * I915_GTT_PAGE_SIZE) - return -EINVAL; - - return context_apply_all(ctx, - __apply_ringsize, - __intel_context_ring_size(args->value)); -} - -static int __get_ringsize(struct intel_context *ce, void *arg) -{ - long sz; - - sz = intel_context_get_ring_size(ce); - GEM_BUG_ON(sz > INT_MAX); - - return sz; /* stop on first engine */ -} - -static int get_ringsize(struct i915_gem_context *ctx, - struct drm_i915_gem_context_param *args) -{ - int sz; - - if (!HAS_LOGICAL_RING_CONTEXTS(ctx->i915)) - return -ENODEV; - - if (args->size) - return -EINVAL; - - sz = context_apply_all(ctx, __get_ringsize, NULL); - if (sz < 0) - return sz; - - args->value = sz; - return 0; -} - int i915_gem_user_to_context_sseu(struct intel_gt *gt, const struct drm_i915_gem_context_param_sseu *user, @@ -1966,19 +1900,17 @@ set_persistence(struct i915_gem_context *ctx, return __context_set_persistence(ctx, args->value); }

-static int __apply_priority(struct intel_context *ce, void *arg) +static void __apply_priority(struct intel_context *ce, void *arg) { struct i915_gem_context *ctx = arg;

if (!intel_engine_has_timeslices(ce->engine)) - return 0; + return;

if (ctx->sched.priority >= I915_PRIORITY_NORMAL) intel_context_set_use_semaphores(ce); else intel_context_clear_use_semaphores(ce); - - return 0; }

static int set_priority(struct i915_gem_context *ctx, @@ -2071,11 +2003,8 @@ static int ctx_setparam(struct drm_i915_file_private *fpriv, ret = set_persistence(ctx, args); break;

- case I915_CONTEXT_PARAM_RINGSIZE: - ret = set_ringsize(ctx, args); - break; - case I915_CONTEXT_PARAM_BAN_PERIOD: + case I915_CONTEXT_PARAM_RINGSIZE: default: ret = -EINVAL; break; @@ -2317,11 +2246,8 @@ int i915_gem_context_getparam_ioctl(struct drm_device *dev, void *data, args->value = i915_gem_context_is_persistent(ctx); break;

- case I915_CONTEXT_PARAM_RINGSIZE: - ret = get_ringsize(ctx, args); - break; - case I915_CONTEXT_PARAM_BAN_PERIOD: + case I915_CONTEXT_PARAM_RINGSIZE: default: ret = -EINVAL; break; diff --git a/drivers/gpu/drm/i915/gt/intel_context_param.c b/drivers/gpu/drm/i915/gt/intel_context_param.c deleted file mode 100644 index 65dcd090245d6..0000000000000 --- a/drivers/gpu/drm/i915/gt/intel_context_param.c +++ /dev/null @@ -1,63 +0,0 @@ -// SPDX-License-Identifier: MIT -/* - * Copyright © 2019 Intel Corporation - */ - -#include "i915_active.h" -#include "intel_context.h" -#include "intel_context_param.h" -#include "intel_ring.h" - -int intel_context_set_ring_size(struct intel_context *ce, long sz) -{ - int err; - - if (intel_context_lock_pinned(ce)) - return -EINTR; - - err = i915_active_wait(&ce->active); - if (err < 0) - goto unlock; - - if (intel_context_is_pinned(ce)) { - err = -EBUSY; /* In active use, come back later! */ - goto unlock; - } - - if (test_bit(CONTEXT_ALLOC_BIT, &ce->flags)) { - struct intel_ring *ring; - - /* Replace the existing ringbuffer */ - ring = intel_engine_create_ring(ce->engine, sz); - if (IS_ERR(ring)) { - err = PTR_ERR(ring); - goto unlock; - } - - intel_ring_put(ce->ring); - ce->ring = ring; - - /* Context image will be updated on next pin */ - } else { - ce->ring = __intel_context_ring_size(sz); - } - -unlock: - intel_context_unlock_pinned(ce); - return err; -} - -long intel_context_get_ring_size(struct intel_context *ce) -{ - long sz = (unsigned long)READ_ONCE(ce->ring); - - if (test_bit(CONTEXT_ALLOC_BIT, &ce->flags)) { - if (intel_context_lock_pinned(ce)) - return -EINTR; - - sz = ce->ring->size; - intel_context_unlock_pinned(ce); - } - - return sz; -} diff --git a/drivers/gpu/drm/i915/gt/intel_context_param.h b/drivers/gpu/drm/i915/gt/intel_context_param.h deleted file mode 100644 index f053d8633fe2a..0000000000000 --- a/drivers/gpu/drm/i915/gt/intel_context_param.h +++ /dev/null @@ -1,14 +0,0 @@ -/* SPDX-License-Identifier: MIT */ -/* - * Copyright © 2019 Intel Corporation - */ - -#ifndef INTEL_CONTEXT_PARAM_H -#define INTEL_CONTEXT_PARAM_H - -struct intel_context; - -int intel_context_set_ring_size(struct intel_context *ce, long sz); -long intel_context_get_ring_size(struct intel_context *ce); - -#endif /* INTEL_CONTEXT_PARAM_H */ diff --git a/drivers/gpu/drm/i915/gt/intel_lrc.c b/drivers/gpu/drm/i915/gt/intel_lrc.c index 8508b8d701c10..52c9e4658e744 100644 --- a/drivers/gpu/drm/i915/gt/intel_lrc.c +++ b/drivers/gpu/drm/i915/gt/intel_lrc.c @@ -1131,7 +1131,6 @@ u32 lrc_update_regs(const struct intel_context *ce, regs[CTX_RING_START] = i915_ggtt_offset(ring->vma); regs[CTX_RING_HEAD] = head; regs[CTX_RING_TAIL] = ring->tail; - regs[CTX_RING_CTL] = RING_CTL_SIZE(ring->size) | RING_VALID;

/* RPCS */ if (engine->class == RENDER_CLASS) { diff --git a/include/uapi/drm/i915_drm.h b/include/uapi/drm/i915_drm.h index 0ed1b88afedd5..5a45ac158bbfa 100644 --- a/include/uapi/drm/i915_drm.h +++ b/include/uapi/drm/i915_drm.h @@ -1675,24 +1675,8 @@ struct drm_i915_gem_context_param { */ #define I915_CONTEXT_PARAM_PERSISTENCE 0xb

-/* - * I915_CONTEXT_PARAM_RINGSIZE: - * - * Sets the size of the CS ringbuffer to use for logical ring contexts. This - * applies a limit of how many batches can be queued to HW before the caller - * is blocked due to lack of space for more commands. - * - * Only reliably possible to be set prior to first use, i.e. during - * construction. At any later point, the current execution must be flushed as - * the ring can only be changed while the context is idle. Note, the ringsize - * can be specified as a constructor property, see - * I915_CONTEXT_CREATE_EXT_SETPARAM, but can also be set later if required. - * - * Only applies to the current set of engine and lost when those engines - * are replaced by a new mapping (see I915_CONTEXT_PARAM_ENGINES). - * - * Must be between 4 - 512 KiB, in intervals of page size [4 KiB]. - * Default is 16 KiB. +/* This API has been removed. On the off chance someone somewhere has + * attempted to use it, never re-use this context param number. */ #define I915_CONTEXT_PARAM_RINGSIZE 0xc /* Must be kept compact -- no holes and well documented */