mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 09:19:51 +00:00
![Chris Wilson](/assets/img/avatar_default.png)
To maintain a fast lookup from a GT centric irq handler, we want the engine lookup tables on the intel_gt. To avoid having multiple copies of the same multi-dimension lookup table, move the generic user engine lookup into an rbtree (for fast and flexible indexing). v2: Split uabi_instance cf uabi_class v3: Set uabi_class/uabi_instance after collating all engines to provide a stable uabi across parallel unordered construction. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com> Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com> #v2 Link: https://patchwork.freedesktop.org/patch/msgid/20190806124300.24945-2-chris@chris-wilson.co.uk
191 lines
4.8 KiB
C
191 lines
4.8 KiB
C
/*
|
|
* SPDX-License-Identifier: MIT
|
|
*
|
|
* Copyright © 2018 Intel Corporation
|
|
*/
|
|
|
|
#include <linux/nospec.h>
|
|
|
|
#include "i915_drv.h"
|
|
#include "i915_query.h"
|
|
#include <uapi/drm/i915_drm.h>
|
|
|
|
static int copy_query_item(void *query_hdr, size_t query_sz,
|
|
u32 total_length,
|
|
struct drm_i915_query_item *query_item)
|
|
{
|
|
if (query_item->length == 0)
|
|
return total_length;
|
|
|
|
if (query_item->length < total_length)
|
|
return -EINVAL;
|
|
|
|
if (copy_from_user(query_hdr, u64_to_user_ptr(query_item->data_ptr),
|
|
query_sz))
|
|
return -EFAULT;
|
|
|
|
if (!access_ok(u64_to_user_ptr(query_item->data_ptr),
|
|
total_length))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int query_topology_info(struct drm_i915_private *dev_priv,
|
|
struct drm_i915_query_item *query_item)
|
|
{
|
|
const struct sseu_dev_info *sseu = &RUNTIME_INFO(dev_priv)->sseu;
|
|
struct drm_i915_query_topology_info topo;
|
|
u32 slice_length, subslice_length, eu_length, total_length;
|
|
u8 subslice_stride = GEN_SSEU_STRIDE(sseu->max_subslices);
|
|
u8 eu_stride = GEN_SSEU_STRIDE(sseu->max_eus_per_subslice);
|
|
int ret;
|
|
|
|
if (query_item->flags != 0)
|
|
return -EINVAL;
|
|
|
|
if (sseu->max_slices == 0)
|
|
return -ENODEV;
|
|
|
|
BUILD_BUG_ON(sizeof(u8) != sizeof(sseu->slice_mask));
|
|
|
|
slice_length = sizeof(sseu->slice_mask);
|
|
subslice_length = sseu->max_slices * subslice_stride;
|
|
eu_length = sseu->max_slices * sseu->max_subslices * eu_stride;
|
|
total_length = sizeof(topo) + slice_length + subslice_length +
|
|
eu_length;
|
|
|
|
ret = copy_query_item(&topo, sizeof(topo), total_length,
|
|
query_item);
|
|
if (ret != 0)
|
|
return ret;
|
|
|
|
if (topo.flags != 0)
|
|
return -EINVAL;
|
|
|
|
memset(&topo, 0, sizeof(topo));
|
|
topo.max_slices = sseu->max_slices;
|
|
topo.max_subslices = sseu->max_subslices;
|
|
topo.max_eus_per_subslice = sseu->max_eus_per_subslice;
|
|
|
|
topo.subslice_offset = slice_length;
|
|
topo.subslice_stride = subslice_stride;
|
|
topo.eu_offset = slice_length + subslice_length;
|
|
topo.eu_stride = eu_stride;
|
|
|
|
if (__copy_to_user(u64_to_user_ptr(query_item->data_ptr),
|
|
&topo, sizeof(topo)))
|
|
return -EFAULT;
|
|
|
|
if (__copy_to_user(u64_to_user_ptr(query_item->data_ptr + sizeof(topo)),
|
|
&sseu->slice_mask, slice_length))
|
|
return -EFAULT;
|
|
|
|
if (__copy_to_user(u64_to_user_ptr(query_item->data_ptr +
|
|
sizeof(topo) + slice_length),
|
|
sseu->subslice_mask, subslice_length))
|
|
return -EFAULT;
|
|
|
|
if (__copy_to_user(u64_to_user_ptr(query_item->data_ptr +
|
|
sizeof(topo) +
|
|
slice_length + subslice_length),
|
|
sseu->eu_mask, eu_length))
|
|
return -EFAULT;
|
|
|
|
return total_length;
|
|
}
|
|
|
|
static int
|
|
query_engine_info(struct drm_i915_private *i915,
|
|
struct drm_i915_query_item *query_item)
|
|
{
|
|
struct drm_i915_query_engine_info __user *query_ptr =
|
|
u64_to_user_ptr(query_item->data_ptr);
|
|
struct drm_i915_engine_info __user *info_ptr;
|
|
struct drm_i915_query_engine_info query;
|
|
struct drm_i915_engine_info info = { };
|
|
struct intel_engine_cs *engine;
|
|
int len, ret;
|
|
|
|
if (query_item->flags)
|
|
return -EINVAL;
|
|
|
|
len = sizeof(struct drm_i915_query_engine_info) +
|
|
RUNTIME_INFO(i915)->num_engines *
|
|
sizeof(struct drm_i915_engine_info);
|
|
|
|
ret = copy_query_item(&query, sizeof(query), len, query_item);
|
|
if (ret != 0)
|
|
return ret;
|
|
|
|
if (query.num_engines || query.rsvd[0] || query.rsvd[1] ||
|
|
query.rsvd[2])
|
|
return -EINVAL;
|
|
|
|
info_ptr = &query_ptr->engines[0];
|
|
|
|
for_each_uabi_engine(engine, i915) {
|
|
info.engine.engine_class = engine->uabi_class;
|
|
info.engine.engine_instance = engine->uabi_instance;
|
|
info.capabilities = engine->uabi_capabilities;
|
|
|
|
if (__copy_to_user(info_ptr, &info, sizeof(info)))
|
|
return -EFAULT;
|
|
|
|
query.num_engines++;
|
|
info_ptr++;
|
|
}
|
|
|
|
if (__copy_to_user(query_ptr, &query, sizeof(query)))
|
|
return -EFAULT;
|
|
|
|
return len;
|
|
}
|
|
|
|
static int (* const i915_query_funcs[])(struct drm_i915_private *dev_priv,
|
|
struct drm_i915_query_item *query_item) = {
|
|
query_topology_info,
|
|
query_engine_info,
|
|
};
|
|
|
|
int i915_query_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
|
|
{
|
|
struct drm_i915_private *dev_priv = to_i915(dev);
|
|
struct drm_i915_query *args = data;
|
|
struct drm_i915_query_item __user *user_item_ptr =
|
|
u64_to_user_ptr(args->items_ptr);
|
|
u32 i;
|
|
|
|
if (args->flags != 0)
|
|
return -EINVAL;
|
|
|
|
for (i = 0; i < args->num_items; i++, user_item_ptr++) {
|
|
struct drm_i915_query_item item;
|
|
unsigned long func_idx;
|
|
int ret;
|
|
|
|
if (copy_from_user(&item, user_item_ptr, sizeof(item)))
|
|
return -EFAULT;
|
|
|
|
if (item.query_id == 0)
|
|
return -EINVAL;
|
|
|
|
if (overflows_type(item.query_id - 1, unsigned long))
|
|
return -EINVAL;
|
|
|
|
func_idx = item.query_id - 1;
|
|
|
|
ret = -EINVAL;
|
|
if (func_idx < ARRAY_SIZE(i915_query_funcs)) {
|
|
func_idx = array_index_nospec(func_idx,
|
|
ARRAY_SIZE(i915_query_funcs));
|
|
ret = i915_query_funcs[func_idx](dev_priv, &item);
|
|
}
|
|
|
|
/* Only write the length back to userspace if they differ. */
|
|
if (ret != item.length && put_user(ret, &user_item_ptr->length))
|
|
return -EFAULT;
|
|
}
|
|
|
|
return 0;
|
|
}
|