/*
* SPDX-License-Identifier: MIT
*
* Copyright © 2018 Intel Corporation
*/
#include <linux/nospec.h>
#include "i915_drv.h"
#include "i915_perf.h"
#include "i915_query.h"
#include "gt/intel_engine_user.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;
return 0;
}
static int fill_topology_info(const struct sseu_dev_info *sseu,
struct drm_i915_query_item *query_item,
intel_sseu_ss_mask_t subslice_mask)
{
struct drm_i915_query_topology_info topo;
u32 slice_length, subslice_length, eu_length, total_length;
int ss_stride = GEN_SSEU_STRIDE(sseu->max_subslices);
int eu_stride = GEN_SSEU_STRIDE(sseu->max_eus_per_subslice);
int ret;
BUILD_BUG_ON(sizeof(u8) != sizeof(sseu->slice_mask));
if (sseu->max_slices == 0)
return -ENODEV;
slice_length = sizeof(sseu->slice_mask);
subslice_length = sseu->max_slices * ss_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;
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 = ss_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 (intel_sseu_copy_ssmask_to_user(u64_to_user_ptr(query_item->data_ptr +
sizeof(topo) + slice_length),
sseu))
return -EFAULT;
if (intel_sseu_copy_eumask_to_user(u64_to_user_ptr(query_item->data_ptr +
sizeof(topo) +
slice_length + subslice_length),
sseu))
return -EFAULT;
return total_length;
}
static int query_topology_info(struct drm_i915_private *dev_priv,
struct drm_i915_query_item *query_item)
{
const struct sseu_dev_info *sseu = &to_gt(dev_priv)->info.sseu;
if (query_item->flags != 0)
return -EINVAL;
return fill_topology_info(sseu, query_item, sseu->subslice_mask);
}
static int query_geometry_subslices(struct drm_i915_private *i915,
struct drm_i915_query_item *query_item)
{
const struct sseu_dev_info *sseu;
struct intel_engine_cs *engine;
struct i915_engine_class_instance classinstance;
if (GRAPHICS_VER_FULL(i915) < IP_VER(12, 55))
return -ENODEV;
classinstance = *((struct i915_engine_class_instance *)&query_item->flags);
engine = intel_engine_lookup_user(i915, (u8)classinstance.engine_class,
(u8)classinstance.engine_instance);
if (!engine)
return -EINVAL;
if (engine->class != RENDER_CLASS)
return -EINVAL;
sseu = &engine->gt->info.sseu;
return fill_topology_info(sseu, query_item, sseu->geometry_subslice_mask);
}
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 = { };
unsigned int num_uabi_engines = 0;
struct intel_engine_cs *engine;
int len, ret;
if (query_item->flags)
return -EINVAL;
for_each_uabi_engine(engine, i915)
num_uabi_engines++;
len = struct_size(query_ptr, engines, num_uabi_engines);
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.flags = I915_ENGINE_INFO_HAS_LOGICAL_INSTANCE;
info.capabilities = engine->uabi_capabilities;
info.logical_instance = ilog2(engine->logical_mask);
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 can_copy_perf_config_registers_or_number(u32 user_n_regs,
u64 user_regs_ptr,
u32 kernel_n_regs)
{
/*
* We'll just put the number of registers, and won't copy the
* register.
*/
if (user_n_regs == 0)
return 0;
if (user_n_regs < kernel_n_regs)
return -EINVAL;
return 0;
}
static int copy_perf_config_registers_or_number(const struct i915_oa_reg *kernel_regs,
u32 kernel_n_regs,
u64 user_regs_ptr,
u32 *user_n_regs)
{
u32 __user *p = u64_to_user_ptr(user_regs_ptr);
u32 r;
if (*user_n_regs == 0) {
*user_n_regs = kernel_n_regs;
return 0;
}
*user_n_regs = kernel_n_regs;
if (!user_write_access_begin(p, 2 * sizeof(u32) * kernel_n_regs))
return -EFAULT;
for (r = 0; r < kernel_n_regs; r++, p += 2) {
unsafe_put_user(i915_mmio_reg_offset(kernel_regs[r].addr),
p, Efault);
unsafe_put_user(kernel_regs[r].value, p + 1, Efault);
}
user_write_access_end();
return 0;
Efault:
user_write_access_end();
return -EFAULT;
}
static int query_perf_config_data(struct drm_i915_private *i915,
struct drm_i915_query_item *query_item,
bool use_uuid)
{
struct drm_i915_query_perf_config __user *user_query_config_ptr =
u64_to_user_ptr(query_item->data_ptr);
struct drm_i915_perf_oa_config __user *user_config_ptr =
u64_to_user_ptr(query_item->data_ptr +
sizeof(struct drm_i915_query_perf_config));
struct drm_i915_perf_oa_config user_config;
struct i915_perf *perf = &i915->perf;
struct i915_oa_config *oa_config;
char uuid[UUID_STRING_LEN + 1];
u64 config_id;
u32 flags, total_size;
int ret;
if (!perf->i915)
return -ENODEV;
total_size =
sizeof(struct drm_i915_query_perf_config) +
sizeof(struct drm_i915_perf_oa_config);
if (query_item->length == 0)
return total_size;
if (query_item->length < total_size) {
drm_dbg(&i915->drm,
"Invalid query config data item size=%u expected=%u\n",
query_item->length, total_size);
return -EINVAL;
}
if (get_user(flags, &user_query_config_ptr->flags))
return -EFAULT;
if (flags != 0)
return -EINVAL;
if (use_uuid) {
struct i915_oa_config *tmp;
int id;
BUILD_BUG_ON(sizeof(user_query_config_ptr->uuid) >= sizeof(uuid));
memset(&uuid, 0, sizeof(uuid));
if (copy_from_user(uuid, user_query_config_ptr->uuid,
sizeof(user_query_config_ptr->uuid)))
return -EFAULT;
oa_config = NULL;
rcu_read_lock();
idr_for_each_entry(&perf->metrics_idr, tmp, id) {
if (!strcmp(tmp->uuid, uuid)) {
oa_config = i915_oa_config_get(tmp);
break;
}
}
rcu_read_unlock();
} else {
if (get_user(config_id, &user_query_config_ptr->config))
return -EFAULT;
oa_config = i915_perf_get_oa_config(perf, config_id);
}
if (!oa_config)
return -ENOENT;
if (copy_from_user(&user_config, user_config_ptr, sizeof(user_config))) {
ret = -EFAULT;
goto out;
}
ret = can_copy_perf_config_registers_or_number(user_config.n_boolean_regs,
user_config.boolean_regs_ptr,
oa_config->b_counter_regs_len);
if (ret)
goto out;
ret = can_copy_perf_config_registers_or_number(user_config.n_flex_regs,
user_config.flex_regs_ptr,
oa_config->flex_regs_len);
if (ret)
goto out;
ret = can_copy_perf_config_registers_or_number(user_config.n_mux_regs,
user_config.mux_regs_ptr,
oa_config->mux_regs_len);
if (ret)
goto out;
ret = copy_perf_config_registers_or_number(oa_config->b_counter_regs,
oa_config->b_counter_regs_len,
user_config.boolean_regs_ptr,
&user_config.n_boolean_regs);
if (ret)
goto out;
ret = copy_perf_config_registers_or_number(oa_config->flex_regs,
oa_config->flex_regs_len,
user_config.flex_regs_ptr,
&user_config.n_flex_regs);
if (ret)
goto out;
ret = copy_perf_config_registers_or_number(oa_config->mux_regs,
oa_config->mux_regs_len,
user_config.mux_regs_ptr,
&user_config.n_mux_regs);
if (ret)
goto out;
memcpy(user_config.uuid, oa_config->uuid, sizeof(user_config.uuid));
if (copy_to_user(user_config_ptr, &user_config, sizeof(user_config))) {
ret = -EFAULT;
goto out;
}
ret = total_size;
out:
i915_oa_config_put(oa_config);
return ret;
}
static size_t sizeof_perf_config_list(size_t count)
{
return sizeof(struct drm_i915_query_perf_config) + sizeof(u64) * count;
}
static size_t sizeof_perf_metrics(struct i915_perf *perf)
{
struct i915_oa_config *tmp;
size_t i;
int id;
i = 1;
rcu_read_lock();
idr_for_each_entry(&perf->metrics_idr, tmp, id)
i++;
rcu_read_unlock();
return sizeof_perf_config_list(i);
}
static int query_perf_config_list(struct drm_i915_private *i915,
struct drm_i915_query_item *query_item)
{
struct drm_i915_query_perf_config __user *user_query_config_ptr =
u64_to_user_ptr(query_item->data_ptr);
struct i915_perf *perf = &i915->perf;
u64 *oa_config_ids = NULL;
int alloc, n_configs;
u32 flags;
int ret;
if (!perf->i915)
return -ENODEV;
if (query_item->length == 0)
return sizeof_perf_metrics(perf);
if (get_user(flags, &user_query_config_ptr->flags))
return -EFAULT;
if (flags != 0)
return -EINVAL;
n_configs = 1;
do {
struct i915_oa_config *tmp;
u64 *ids;
int id;
ids = krealloc(oa_config_ids,
n_configs * sizeof(*oa_config_ids),
GFP_KERNEL);
if (!ids)
return -ENOMEM;
alloc = fetch_and_zero(&n_configs);
ids[n_configs++] = 1ull; /* reserved for test_config */
rcu_read_lock();
idr_for_each_entry(&perf->metrics_idr, tmp, id) {
if (n_configs < alloc)
ids[n_configs] = id;
n_configs++;
}
rcu_read_unlock();
oa_config_ids = ids;
} while (n_configs > alloc);
if (query_item->length < sizeof_perf_config_list(n_configs)) {
drm_dbg(&i915->drm,
"Invalid query config list item size=%u expected=%zu\n",
query_item->length,
sizeof_perf_config_list(n_configs));
kfree(oa_config_ids);
return -EINVAL;
}
if (put_user(n_configs, &user_query_config_ptr->config)) {
kfree(oa_config_ids);
return -EFAULT;
}
ret = copy_to_user(user_query_config_ptr + 1,
oa_config_ids,
n_configs * sizeof(*oa_config_ids));
kfree(oa_config_ids);
if (ret)
return -EFAULT;
return sizeof_perf_config_list(n_configs);
}
static int query_perf_config(struct drm_i915_private *i915,
struct drm_i915_query_item *query_item)
{
switch (query_item->flags) {
case DRM_I915_QUERY_PERF_CONFIG_LIST:
return query_perf_config_list(i915, query_item);
case DRM_I915_QUERY_PERF_CONFIG_DATA_FOR_UUID:
return query_perf_config_data(i915, query_item, true);
case DRM_I915_QUERY_PERF_CONFIG_DATA_FOR_ID:
return query_perf_config_data(i915, query_item, false);
default:
return -EINVAL;
}
}
static int query_memregion_info(struct drm_i915_private *i915,
struct drm_i915_query_item *query_item)
{
struct drm_i915_query_memory_regions __user *query_ptr =
u64_to_user_ptr(query_item->data_ptr);
struct drm_i915_memory_region_info __user *info_ptr =
&query_ptr->regions[0];
struct drm_i915_memory_region_info info = { };
struct drm_i915_query_memory_regions query;
struct intel_memory_region *mr;
u32 total_length;
int ret, id, i;
if (query_item->flags != 0)
return -EINVAL;
total_length = sizeof(query);
for_each_memory_region(mr, i915, id) {
if (mr->private)
continue;
total_length += sizeof(info);
}
ret = copy_query_item(&query, sizeof(query), total_length, query_item);
if (ret != 0)
return ret;
if (query.num_regions)
return -EINVAL;
for (i = 0; i < ARRAY_SIZE(query.rsvd); i++) {
if (query.rsvd[i])
return -EINVAL;
}
for_each_memory_region(mr, i915, id) {
if (mr->private)
continue;
info.region.memory_class = mr->type;
info.region.memory_instance = mr->instance;
info.probed_size = mr->total;
if (mr->type == INTEL_MEMORY_LOCAL)
info.probed_cpu_visible_size = resource_size(&mr->io);
else
info.probed_cpu_visible_size = mr->total;
if (perfmon_capable()) {
intel_memory_region_avail(mr,
&info.unallocated_size,
&info.unallocated_cpu_visible_size);
} else {
info.unallocated_size = info.probed_size;
info.unallocated_cpu_visible_size =
info.probed_cpu_visible_size;
}
if (__copy_to_user(info_ptr, &info, sizeof(info)))
return -EFAULT;
query.num_regions++;
info_ptr++;
}
if (__copy_to_user(query_ptr, &query, sizeof(query)))
return -EFAULT;
return total_length;
}
static int query_hwconfig_blob(struct drm_i915_private *i915,
struct drm_i915_query_item *query_item)
{
struct intel_gt *gt = to_gt(i915);
struct intel_hwconfig *hwconfig = >->info.hwconfig;
if (!hwconfig->size || !hwconfig->ptr)
return -ENODEV;
if (query_item->length == 0)
return hwconfig->size;
if (query_item->length < hwconfig->size)
return -EINVAL;
if (copy_to_user(u64_to_user_ptr(query_item->data_ptr),
hwconfig->ptr, hwconfig->size))
return -EFAULT;
return hwconfig->size;
}
static int
query_guc_submission_version(struct drm_i915_private *i915,
struct drm_i915_query_item *query)
{
struct drm_i915_query_guc_submission_version __user *query_ptr =
u64_to_user_ptr(query->data_ptr);
struct drm_i915_query_guc_submission_version ver;
struct intel_guc *guc = &to_gt(i915)->uc.guc;
const size_t size = sizeof(ver);
int ret;
if (!intel_uc_uses_guc_submission(&to_gt(i915)->uc))
return -ENODEV;
ret = copy_query_item(&ver, size, size, query);
if (ret != 0)
return ret;
if (ver.branch || ver.major || ver.minor || ver.patch)
return -EINVAL;
ver.branch = 0;
ver.major = guc->submission_version.major;
ver.minor = guc->submission_version.minor;
ver.patch = guc->submission_version.patch;
if (copy_to_user(query_ptr, &ver, size))
return -EFAULT;
return 0;
}
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,
query_perf_config,
query_memregion_info,
query_hwconfig_blob,
query_geometry_subslices,
query_guc_submission_version,
};
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;
}
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