On 07/17, Lionel Landwerlin wrote:
> The motivation behind this new interface is expose at runtime the
> creation of new OA configs which can be used as part of the i915 perf
> open interface. This will enable the kernel to learn new configs which
> may be experimental, or otherwise not part of the core set currently
> available through the i915 perf interface.
>
> This will relieve the kernel from holding all the possible configs, so
> we can leave only the test configs here.
>
> v2: Drop DRM_ERROR for userspace errors (Matthew)
> Add padding to userspace structure (Matthew)
> s/guid/uuid/ (Matthew)
>
> v3: Use u32 instead of int to iterate through registers (Matthew)
>
> v4: Lock access to dynamic config list (Lionel)
>
> Signed-off-by: Matthew Auld <matthew.auld@xxxxxxxxx>
> Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@xxxxxxxxx>
> Signed-off-by: Andrzej Datczuk <andrzej.datczuk@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/i915_drv.c | 2 +
> drivers/gpu/drm/i915/i915_drv.h | 48 +++++
> drivers/gpu/drm/i915/i915_perf.c | 413 +++++++++++++++++++++++++++++++++++++--
> drivers/gpu/drm/i915/i915_reg.h | 2 +
> include/uapi/drm/i915_drm.h | 24 +++
> 5 files changed, 475 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
> index d310d8245dca..a3d339670ec1 100644
> --- a/drivers/gpu/drm/i915/i915_drv.c
> +++ b/drivers/gpu/drm/i915/i915_drv.c
> @@ -2730,6 +2730,8 @@ static const struct drm_ioctl_desc i915_ioctls[] = {
> DRM_IOCTL_DEF_DRV(I915_GEM_CONTEXT_GETPARAM, i915_gem_context_getparam_ioctl, DRM_RENDER_ALLOW),
> DRM_IOCTL_DEF_DRV(I915_GEM_CONTEXT_SETPARAM, i915_gem_context_setparam_ioctl, DRM_RENDER_ALLOW),
> DRM_IOCTL_DEF_DRV(I915_PERF_OPEN, i915_perf_open_ioctl, DRM_RENDER_ALLOW),
> + DRM_IOCTL_DEF_DRV(I915_PERF_ADD_CONFIG, i915_perf_add_config_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
> + DRM_IOCTL_DEF_DRV(I915_PERF_REMOVE_CONFIG, i915_perf_remove_config_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
> };
>
> static struct drm_driver driver = {
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index 2b824f8875c4..607484737f3d 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -1917,6 +1917,9 @@ struct i915_oa_config {
> struct attribute_group sysfs_metric;
> struct attribute *attrs[2];
> struct device_attribute sysfs_metric_id;
> +
> + /* Only updated while holding dev_priv->perf.metrics_lock. */
> + bool in_use;
> };
>
> struct i915_perf_stream;
> @@ -2043,6 +2046,25 @@ struct i915_perf_stream {
> */
> struct i915_oa_ops {
> /**
> + * @is_valid_b_counter_reg: Validates register's address for
> + * programming boolean counters for a particular platform.
> + */
> + bool (*is_valid_b_counter_reg)(struct drm_i915_private *dev_priv,
> + u32 addr);
> +
> + /**
> + * @is_valid_mux_reg: Validates register's address for programming mux
> + * for a particular platform.
> + */
> + bool (*is_valid_mux_reg)(struct drm_i915_private *dev_priv, u32 addr);
> +
> + /**
> + * @is_valid_flex_reg: Validates register's address for programming
> + * flex EU filtering for a particular platform.
> + */
> + bool (*is_valid_flex_reg)(struct drm_i915_private *dev_priv, u32 addr);
> +
> + /**
> * @init_oa_buffer: Resets the head and tail pointers of the
> * circular buffer for periodic OA reports.
> *
> @@ -2430,10 +2452,32 @@ struct drm_i915_private {
> struct kobject *metrics_kobj;
> struct ctl_table_header *sysctl_header;
>
> + /*
> + * Lock associated with adding/modifying/removing OA configs
> + * in dev_priv->perf.metrics_idr.
> + */
> + struct mutex metrics_lock;
> +
> + /*
> + * List of dynamic configurations, you need to hold
> + * dev_priv->perf.metrics_lock to access it.
> + */
> + struct idr metrics_idr;
> +
> + /*
> + * Lock associated with anything below within this structure
> + * except exclusive_stream.
> + */
> struct mutex lock;
> struct list_head streams;
>
> struct {
> + /*
> + * The stream currently using the OA unit. If accessed
> + * outside a syscall associated to its file
> + * descriptor, you need to hold
> + * dev_priv->drm.struct_mutex.
> + */
> struct i915_perf_stream *exclusive_stream;
>
> u32 specific_ctx_id;
> @@ -3599,6 +3643,10 @@ i915_gem_context_lookup_timeline(struct i915_gem_context *ctx,
>
> int i915_perf_open_ioctl(struct drm_device *dev, void *data,
> struct drm_file *file);
> +int i915_perf_add_config_ioctl(struct drm_device *dev, void *data,
> + struct drm_file *file);
> +int i915_perf_remove_config_ioctl(struct drm_device *dev, void *data,
> + struct drm_file *file);
> void i915_oa_init_reg_state(struct intel_engine_cs *engine,
> struct i915_gem_context *ctx,
> uint32_t *reg_state);
> diff --git a/drivers/gpu/drm/i915/i915_perf.c b/drivers/gpu/drm/i915/i915_perf.c
> index e95e7755a19b..dd788cf34d79 100644
> --- a/drivers/gpu/drm/i915/i915_perf.c
> +++ b/drivers/gpu/drm/i915/i915_perf.c
> @@ -357,6 +357,43 @@ struct perf_open_properties {
> int oa_period_exponent;
> };
>
> +static int get_oa_config(struct drm_i915_private *dev_priv,
> + int metrics_set,
> + struct i915_oa_config **out_config)
> +{
> + int ret;
> +
> + if (metrics_set == 1) {
> + *out_config = &dev_priv->perf.oa.test_config;
> + return 0;
> + }
> +
> + ret = mutex_lock_interruptible(&dev_priv->perf.metrics_lock);
> + if (ret)
> + return ret;
> +
> + *out_config = idr_find(&dev_priv->perf.metrics_idr, metrics_set);
> + if (!*out_config)
> + ret = -EINVAL;
> + else
> + (*out_config)->in_use = true;
> +
> + mutex_unlock(&dev_priv->perf.metrics_lock);
> +
> + return ret;
> +}
> +
> +static void put_oa_config(struct drm_i915_private *dev_priv,
> + struct i915_oa_config *oa_config)
> +{
> + if (oa_config == &dev_priv->perf.oa.test_config)
> + return;
> +
> + mutex_lock(&dev_priv->perf.metrics_lock);
> + oa_config->in_use = false;
> + mutex_unlock(&dev_priv->perf.metrics_lock);
> +}
> +
> static u32 gen8_oa_hw_tail_read(struct drm_i915_private *dev_priv)
> {
> return I915_READ(GEN8_OATAILPTR) & GEN8_OATAILPTR_MASK;
> @@ -1246,10 +1283,12 @@ static void i915_oa_stream_destroy(struct i915_perf_stream *stream)
> BUG_ON(stream != dev_priv->perf.oa.exclusive_stream);
>
> /*
> - * Unset exclusive_stream first, it might be checked while
> - * disabling the metric set on gen8+.
> + * Unset exclusive_stream first, it will be checked while disabling
> + * the metric set on gen8+.
> */
> + mutex_lock(&dev_priv->drm.struct_mutex);
> dev_priv->perf.oa.exclusive_stream = NULL;
> + mutex_unlock(&dev_priv->drm.struct_mutex);
>
> dev_priv->perf.oa.ops.disable_metric_set(dev_priv);
>
> @@ -1261,6 +1300,8 @@ static void i915_oa_stream_destroy(struct i915_perf_stream *stream)
> if (stream->ctx)
> oa_put_render_ctx_id(stream);
>
> + put_oa_config(dev_priv, stream->oa_config);
> +
> if (dev_priv->perf.oa.spurious_report_rs.missed) {
> DRM_NOTE("%d spurious OA report notices suppressed due to ratelimiting\n",
> dev_priv->perf.oa.spurious_report_rs.missed);
> @@ -1954,15 +1995,6 @@ static const struct i915_perf_stream_ops i915_oa_stream_ops = {
> .read = i915_oa_read,
> };
>
> -static struct i915_oa_config *get_oa_config(struct drm_i915_private *dev_priv,
> - int metrics_set)
> -{
> - if (metrics_set == 1)
> - return &dev_priv->perf.oa.test_config;
> -
> - return NULL;
> -}
> -
> /**
> * i915_oa_stream_init - validate combined props for OA stream and init
> * @stream: An i915 perf stream
> @@ -2066,9 +2098,9 @@ static int i915_oa_stream_init(struct i915_perf_stream *stream,
> return ret;
> }
>
> - stream->oa_config = get_oa_config(dev_priv, props->metrics_set);
> - if (!stream->oa_config)
> - return -EINVAL;
> + ret = get_oa_config(dev_priv, props->metrics_set, &stream->oa_config);
> + if (ret)
> + return ret;
goto err_config;
>
> /* PRM - observability performance counters:
> *
> @@ -2121,6 +2153,8 @@ static int i915_oa_stream_init(struct i915_perf_stream *stream,
> if (stream->ctx)
> oa_put_render_ctx_id(stream);
>
> + put_oa_config(dev_priv, stream->oa_config);
> +
> return ret;
err_oa_buf_alloc:
...
put_oa_config(dev_priv, stream->oa_config);
err_config:
if (stream->ctx)
...
return ret;
> }
>
> @@ -2131,6 +2165,8 @@ void i915_oa_init_reg_state(struct intel_engine_cs *engine,
> struct drm_i915_private *dev_priv = engine->i915;
> struct i915_perf_stream *stream = dev_priv->perf.oa.exclusive_stream;
>
> + lockdep_assert_held(&dev_priv->drm.struct_mutex);
> +
> if (engine->id != RCS)
> return;
>
> @@ -2929,6 +2965,333 @@ void i915_perf_unregister(struct drm_i915_private *dev_priv)
> dev_priv->perf.metrics_kobj = NULL;
> }
>
> +static bool gen8_is_valid_flex_addr(struct drm_i915_private *dev_priv, u32 addr)
> +{
> + static const i915_reg_t flex_eu_regs[] = {
> + EU_PERF_CNTL0,
> + EU_PERF_CNTL1,
> + EU_PERF_CNTL2,
> + EU_PERF_CNTL3,
> + EU_PERF_CNTL4,
> + EU_PERF_CNTL5,
> + EU_PERF_CNTL6,
> + };
> + int i;
> +
> + for (i = 0; i < ARRAY_SIZE(flex_eu_regs); i++) {
> + if (flex_eu_regs[i].reg == addr)
> + return true;
> + }
> + return false;
> +}
> +
> +static bool gen7_is_valid_b_counter_addr(struct drm_i915_private *dev_priv, u32 addr)
> +{
> + return (addr >= 0x2380 && addr <= 0x27ac);
> +}
> +
> +static bool gen7_is_valid_mux_addr(struct drm_i915_private *dev_priv, u32 addr)
> +{
> + return addr == NOA_WRITE.reg ||
> + (addr >= 0xd0c && addr <= 0xd3c) ||
> + (addr >= 0x25100 && addr <= 0x2FB9C);
> +}
> +
> +static bool hsw_is_valid_mux_addr(struct drm_i915_private *dev_priv, u32 addr)
> +{
> + return (addr >= 0x25100 && addr <= 0x2FF90) ||
> + gen7_is_valid_mux_addr(dev_priv, addr);
> +}
> +
> +static bool chv_is_valid_mux_addr(struct drm_i915_private *dev_priv, u32 addr)
> +{
> + return (addr >= 0x182300 && addr <= 0x1823A4) ||
> + gen7_is_valid_mux_addr(dev_priv, addr);
> +}
> +
> +static struct i915_oa_reg *alloc_oa_regs(struct drm_i915_private *dev_priv,
> + bool (*is_valid)(struct drm_i915_private *dev_priv, u32 addr),
> + u32 __user *regs,
> + u32 n_regs)
> +{
> + struct i915_oa_reg *oa_regs;
> + int err;
> + u32 i;
> +
> + if (!n_regs)
> + return NULL;
> +
> + /* No is_valid function means we're not allowing any register to be programmed. */
> + GEM_BUG_ON(!is_valid);
> + if (!is_valid)
> + return ERR_PTR(-EINVAL);
> +
> + oa_regs = kmalloc(sizeof(*oa_regs) * n_regs, GFP_KERNEL);
oa_regs = kmalloc_array(n_regs, sizeof(*oa_regs), GFP_KERNEL);
> + if (!oa_regs)
> + return ERR_PTR(-ENOMEM);
> +
> + for (i = 0; i < n_regs; i++) {
> + u32 addr, value;
> +
> + err = get_user(addr, regs);
> + if (err)
> + goto addr_err;
> +
> + if (!is_valid(dev_priv, addr)) {
> + DRM_DEBUG("Invalid oa_reg address: %X\n", addr);
> + err = -EINVAL;
> + goto addr_err;
> + }
> +
> + err = get_user(value, regs + 1);
> + if (err)
> + goto addr_err;
> +
> + oa_regs[i].addr = _MMIO(addr);
> + oa_regs[i].value = value;
> +
> + regs += 2;
> + }
> +
> + return oa_regs;
> +
> +addr_err:
> + kfree(oa_regs);
> + return ERR_PTR(err);
> +}
> +
> +static ssize_t show_dynamic_id(struct device *dev,
> + struct device_attribute *attr,
> + char *buf)
> +{
> + struct i915_oa_config *oa_config =
> + container_of(attr, typeof(*oa_config), sysfs_metric_id);
> +
> + return sprintf(buf, "%d\n", oa_config->id);
> +}
> +
> +static int create_dynamic_oa_sysfs_entry(struct drm_i915_private *dev_priv,
> + struct i915_oa_config *oa_config)
> +{
> + oa_config->sysfs_metric_id.attr.name = "id";
> + oa_config->sysfs_metric_id.attr.mode = S_IRUGO;
> + oa_config->sysfs_metric_id.show = show_dynamic_id;
> + oa_config->sysfs_metric_id.store = NULL;
> +
> + oa_config->attrs[0] = &oa_config->sysfs_metric_id.attr;
> + oa_config->attrs[1] = NULL;
> +
> + oa_config->sysfs_metric.name = oa_config->uuid;
> + oa_config->sysfs_metric.attrs = oa_config->attrs;
> +
> + return sysfs_create_group(dev_priv->perf.metrics_kobj,
> + &oa_config->sysfs_metric);
> +}
> +
> +static int destroy_config(int id, void *p, void *data)
> +{
> + struct drm_i915_private *dev_priv = data;
> + struct i915_oa_config *oa_config = p;
> +
> + sysfs_remove_group(dev_priv->perf.metrics_kobj,
> + &oa_config->sysfs_metric);
> + kfree(oa_config->flex_regs);
> + kfree(oa_config->b_counter_regs);
> + kfree(oa_config->mux_regs);
> + kfree(oa_config);
> +
> + return 0;
> +}
> +
> +int i915_perf_add_config_ioctl(struct drm_device *dev, void *data,
> + struct drm_file *file)
> +{
> + struct drm_i915_private *dev_priv = dev->dev_private;
> + struct drm_i915_perf_oa_config *args = data;
> + struct i915_oa_config *oa_config, *tmp;
> + unsigned int x1, x2, x3, x4, x5;
> + int err, id;
> +
> + if (!dev_priv->perf.initialized) {
> + DRM_DEBUG("i915 perf interface not available for this system\n");
> + return -ENOTSUPP;
> + }
> +
> + if (!dev_priv->perf.metrics_kobj) {
> + DRM_DEBUG("OA metrics weren't advertised via sysfs\n");
> + return -EINVAL;
> + }
> +
> + if (!capable(CAP_SYS_ADMIN)) {
> + DRM_DEBUG("Insufficient privileges to add i915 OA config\n");
> + return -EACCES;
> + }
> +
> + if ((!args->mux_regs || !args->n_mux_regs) &&
> + (!args->boolean_regs || !args->n_boolean_regs) &&
> + (!args->flex_regs || !args->n_flex_regs)) {
> + DRM_DEBUG("No OA registers given\n");
> + return -EINVAL;
> + }
> +
> + oa_config = kzalloc(sizeof(*oa_config), GFP_KERNEL);
> + if (!oa_config) {
> + DRM_DEBUG("Failed to allocate memory for the OA config\n");
> + return -ENOMEM;
> + }
> +
> + err = strncpy_from_user(oa_config->uuid, u64_to_user_ptr(args->uuid),
> + UUID_STRING_LEN);
> + if (err < 0) {
> + DRM_DEBUG("Failed to copy uuid from OA config\n");
> + goto mux_err;
> + }
> +
/* TODO: eventually replace with uuid_is_valid() */
> + if (sscanf(oa_config->uuid, "%08x-%04x-%04x-%04x-%012x", &x1, &x2, &x3,
> + &x4, &x5) != 5) {
> + DRM_DEBUG("Invalid uuid format for OA config\n");
> + err = -EINVAL;
> + goto mux_err;
> + }
> +
> + oa_config->mux_regs_len = args->n_mux_regs;
> + oa_config->mux_regs =
> + alloc_oa_regs(dev_priv,
> + dev_priv->perf.oa.ops.is_valid_mux_reg,
> + u64_to_user_ptr(args->mux_regs),
> + args->n_mux_regs);
> +
> + if (IS_ERR(oa_config->mux_regs)) {
> + DRM_DEBUG("Failed to create OA config for mux_regs\n");
> + err = PTR_ERR(oa_config->mux_regs);
> + goto mux_err;
> + }
> +
> + oa_config->b_counter_regs_len = args->n_boolean_regs;
> + oa_config->b_counter_regs =
> + alloc_oa_regs(dev_priv,
> + dev_priv->perf.oa.ops.is_valid_b_counter_reg,
> + u64_to_user_ptr(args->boolean_regs),
> + args->n_boolean_regs);
> +
> + if (IS_ERR(oa_config->b_counter_regs)) {
> + DRM_DEBUG("Failed to create OA config for b_counter_regs\n");
> + err = PTR_ERR(oa_config->b_counter_regs);
> + goto boolean_err;
> + }
> +
> + if (INTEL_GEN(dev_priv) < 8) {
> + if (args->n_flex_regs != 0)
> + goto flex_err;
> + } else {
> + oa_config->flex_regs_len = args->n_flex_regs;
> + oa_config->flex_regs =
> + alloc_oa_regs(dev_priv,
> + dev_priv->perf.oa.ops.is_valid_flex_reg,
> + u64_to_user_ptr(args->flex_regs),
> + args->n_flex_regs);
> +
> + if (IS_ERR(oa_config->flex_regs)) {
> + DRM_DEBUG("Failed to create OA config for flex_regs\n");
> + err = PTR_ERR(oa_config->flex_regs);
> + goto flex_err;
> + }
> + }
> +
> + err = mutex_lock_interruptible(&dev_priv->perf.metrics_lock);
> + if (err)
> + goto lock_err;
> +
> + idr_for_each_entry(&dev_priv->perf.metrics_idr, tmp, id) {
> + if (!strcmp(tmp->uuid, oa_config->uuid)) {
> + DRM_DEBUG("OA config already exists with this uuid\n");
> + err = -EADDRINUSE;
> + goto sysfs_err;
> + }
> + }
> +
> + err = create_dynamic_oa_sysfs_entry(dev_priv, oa_config);
> + if (err) {
> + DRM_DEBUG("Failed to create sysfs entry for OA config\n");
> + goto sysfs_err;
> + }
> +
> + oa_config->id = idr_alloc(&dev_priv->perf.metrics_idr,
> + oa_config, 2,
> + 0, GFP_KERNEL);
> + if (oa_config->id < 0) {
> + DRM_DEBUG("Failed to create sysfs entry for OA config\n");
err = oa_config->id;
> + goto idr_err;
> + }
> +
> + mutex_unlock(&dev_priv->perf.metrics_lock);
> +
> + return oa_config->id;
> +
> +idr_err:
> + sysfs_remove_group(dev_priv->perf.metrics_kobj,
> + &oa_config->sysfs_metric);
> +sysfs_err:
> + mutex_unlock(&dev_priv->perf.metrics_lock);
> +lock_err:
> + kfree(oa_config->flex_regs);
> +flex_err:
> + kfree(oa_config->b_counter_regs);
> +boolean_err:
> + kfree(oa_config->mux_regs);
> +mux_err:
> + kfree(oa_config);
> +
> + DRM_DEBUG("Failed to add new OA config\n");
> + return err;
> +}
> +
> +int i915_perf_remove_config_ioctl(struct drm_device *dev, void *data,
> + struct drm_file *file)
> +{
> + struct drm_i915_private *dev_priv = dev->dev_private;
> + u64 *arg = data;
> + struct i915_oa_config *oa_config;
> + int ret;
> +
> + if (!dev_priv->perf.initialized) {
> + DRM_DEBUG("i915 perf interface not available for this system\n");
> + return -ENOTSUPP;
> + }
> +
> + if (!capable(CAP_SYS_ADMIN)) {
> + DRM_DEBUG("Insufficient privileges to remove i915 OA config\n");
> + return -EACCES;
> + }
> +
> + ret = mutex_lock_interruptible(&dev_priv->perf.metrics_lock);
> + if (ret)
> + goto lock_err;
> +
> + oa_config = idr_find(&dev_priv->perf.metrics_idr, *arg);
> + if (!oa_config) {
> + DRM_DEBUG("Failed to remove unknown OA config\n");
> + ret = -EINVAL;
> + goto config_err;
> + }
> +
> + if (oa_config->in_use) {
> + DRM_DEBUG("Failed to in use OA config\n");
"Failed to remove in use OA config"
> + ret = -EADDRINUSE;
> + goto config_err;
> + }
> +
> + GEM_BUG_ON(*arg != oa_config->id);
> +
> + idr_remove(&dev_priv->perf.metrics_idr, *arg);
> + destroy_config(oa_config->id, oa_config, dev_priv);
> +
> +config_err:
> + mutex_unlock(&dev_priv->perf.metrics_lock);
> +lock_err:
> + return ret;
> +}
> +
> static struct ctl_table oa_table[] = {
> {
> .procname = "perf_stream_paranoid",
> @@ -2983,8 +3346,14 @@ static struct ctl_table dev_root[] = {
> void i915_perf_init(struct drm_i915_private *dev_priv)
> {
> dev_priv->perf.oa.timestamp_frequency = 0;
> + idr_init(&dev_priv->perf.metrics_idr);
>
> if (IS_HASWELL(dev_priv)) {
> + dev_priv->perf.oa.ops.is_valid_b_counter_reg =
> + gen7_is_valid_b_counter_addr;
> + dev_priv->perf.oa.ops.is_valid_mux_reg =
> + hsw_is_valid_mux_addr;
> + dev_priv->perf.oa.ops.is_valid_flex_reg = NULL;
> dev_priv->perf.oa.ops.init_oa_buffer = gen7_init_oa_buffer;
> dev_priv->perf.oa.ops.enable_metric_set = hsw_enable_metric_set;
> dev_priv->perf.oa.ops.disable_metric_set = hsw_disable_metric_set;
> @@ -3004,6 +3373,12 @@ void i915_perf_init(struct drm_i915_private *dev_priv)
> * worth the complexity to maintain now that BDW+ enable
> * execlist mode by default.
> */
> + dev_priv->perf.oa.ops.is_valid_b_counter_reg =
> + gen7_is_valid_b_counter_addr;
> + dev_priv->perf.oa.ops.is_valid_mux_reg =
> + gen7_is_valid_mux_addr;
> + dev_priv->perf.oa.ops.is_valid_flex_reg =
> + gen8_is_valid_flex_addr;
>
> dev_priv->perf.oa.ops.init_oa_buffer = gen8_init_oa_buffer;
> dev_priv->perf.oa.ops.enable_metric_set = gen8_enable_metric_set;
> @@ -3022,6 +3397,10 @@ void i915_perf_init(struct drm_i915_private *dev_priv)
> dev_priv->perf.oa.timestamp_frequency = 12500000;
>
> dev_priv->perf.oa.gen8_valid_ctx_bit = (1<<25);
> + if (IS_CHERRYVIEW(dev_priv)) {
> + dev_priv->perf.oa.ops.is_valid_mux_reg =
> + chv_is_valid_mux_addr;
> + }
> } else if (IS_GEN9(dev_priv)) {
> dev_priv->perf.oa.ctx_oactxctrl_offset = 0x128;
> dev_priv->perf.oa.ctx_flexeu0_offset = 0x3de;
> @@ -3060,6 +3439,9 @@ void i915_perf_init(struct drm_i915_private *dev_priv)
> dev_priv->perf.oa.timestamp_frequency / 2;
> dev_priv->perf.sysctl_header = register_sysctl_table(dev_root);
>
> + mutex_init(&dev_priv->perf.metrics_lock);
> + idr_init(&dev_priv->perf.metrics_idr);
> +
> dev_priv->perf.initialized = true;
> }
> }
> @@ -3073,6 +3455,9 @@ void i915_perf_fini(struct drm_i915_private *dev_priv)
> if (!dev_priv->perf.initialized)
> return;
>
> + idr_for_each(&dev_priv->perf.metrics_idr, destroy_config, dev_priv);
> + idr_destroy(&dev_priv->perf.metrics_idr);
> +
> unregister_sysctl_table(dev_priv->perf.sysctl_header);
>
> memset(&dev_priv->perf.oa.ops, 0, sizeof(dev_priv->perf.oa.ops));
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index c712d01f92ab..fc5934063c83 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -732,6 +732,8 @@ static inline bool i915_mmio_reg_valid(i915_reg_t reg)
> #define GDT_CHICKEN_BITS _MMIO(0x9840)
> #define GT_NOA_ENABLE 0x00000080
>
> +#define NOA_WRITE _MMIO(0x9888)
> +
> /*
> * OA Boolean state
> */
> diff --git a/include/uapi/drm/i915_drm.h b/include/uapi/drm/i915_drm.h
> index 7ccbd6a2bbe0..82b3b873a0f3 100644
> --- a/include/uapi/drm/i915_drm.h
> +++ b/include/uapi/drm/i915_drm.h
> @@ -260,6 +260,8 @@ typedef struct _drm_i915_sarea {
> #define DRM_I915_GEM_CONTEXT_GETPARAM 0x34
> #define DRM_I915_GEM_CONTEXT_SETPARAM 0x35
> #define DRM_I915_PERF_OPEN 0x36
> +#define DRM_I915_PERF_ADD_CONFIG 0x37
> +#define DRM_I915_PERF_REMOVE_CONFIG 0x38
>
> #define DRM_IOCTL_I915_INIT DRM_IOW( DRM_COMMAND_BASE + DRM_I915_INIT, drm_i915_init_t)
> #define DRM_IOCTL_I915_FLUSH DRM_IO ( DRM_COMMAND_BASE + DRM_I915_FLUSH)
> @@ -315,6 +317,8 @@ typedef struct _drm_i915_sarea {
> #define DRM_IOCTL_I915_GEM_CONTEXT_GETPARAM DRM_IOWR (DRM_COMMAND_BASE + DRM_I915_GEM_CONTEXT_GETPARAM, struct drm_i915_gem_context_param)
> #define DRM_IOCTL_I915_GEM_CONTEXT_SETPARAM DRM_IOWR (DRM_COMMAND_BASE + DRM_I915_GEM_CONTEXT_SETPARAM, struct drm_i915_gem_context_param)
> #define DRM_IOCTL_I915_PERF_OPEN DRM_IOW(DRM_COMMAND_BASE + DRM_I915_PERF_OPEN, struct drm_i915_perf_open_param)
> +#define DRM_IOCTL_I915_PERF_ADD_CONFIG DRM_IOWR(DRM_COMMAND_BASE + DRM_I915_PERF_ADD_CONFIG, struct drm_i915_perf_oa_config)
> +#define DRM_IOCTL_I915_PERF_REMOVE_CONFIG DRM_IOWR(DRM_COMMAND_BASE + DRM_I915_PERF_REMOVE_CONFIG, __u64)
These need to be DRM_IOW(), or we'll end up doing do a needless copy_to_user()
>
> /* Allow drivers to submit batchbuffers directly to hardware, relying
> * on the security mechanisms provided by hardware.
> @@ -1467,6 +1471,26 @@ enum drm_i915_perf_record_type {
> DRM_I915_PERF_RECORD_MAX /* non-ABI */
> };
>
> +/**
> + * Structure to upload perf dynamic configuration into the kernel.
> + */
> +struct drm_i915_perf_oa_config {
> + /** String formatted like "%08x-%04x-%04x-%04x-%012x" */
> + __u64 __user uuid;
> +
> + __u32 n_mux_regs;
> + __u32 pad0;
> + __u64 __user mux_regs;
> +
> + __u32 n_boolean_regs;
> + __u32 pad1;
> + __u64 __user boolean_regs;
> +
> + __u32 n_flex_regs;
> + __u32 pad2;
> + __u64 __user flex_regs;
> +};
Not sure if it's worth checking if all the padding is indeed zeroed and reject
if not, in case we ever want to extend?
Otherwise couldn't find anything else to nitpick :)
> +
> #if defined(__cplusplus)
> }
> #endif
> --
> 2.13.2
>
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