From: Tvrtko Ursulin tvrtko.ursulin@intel.com
Similar to AMD commit 874442541133 ("drm/amdgpu: Add show_fdinfo() interface"), using the infrastructure added in previous patches, we add basic client info and GPU engine utilisation for i915.
Example of the output:
pos: 0 flags: 0100002 mnt_id: 21 drm-driver: i915 drm-pdev: 0000:00:02.0 drm-client-id: 7 drm-engine-render: 9288864723 ns drm-engine-copy: 2035071108 ns drm-engine-video: 0 ns drm-engine-video-enhance: 0 ns
v2: * Update for removal of name and pid.
v3: * Use drm_driver.name.
v4: * Added drm-engine-capacity- tag. * Fix typo. (Umesh)
Signed-off-by: Tvrtko Ursulin tvrtko.ursulin@intel.com Cc: David M Nieto David.Nieto@amd.com Cc: Christian König christian.koenig@amd.com Cc: Daniel Vetter daniel@ffwll.ch Cc: Chris Healy cphealy@gmail.com Acked-by: Christian König christian.koenig@amd.com Reviewed-by: Umesh Nerlige Ramappa umesh.nerlige.ramappa@intel.com --- Documentation/gpu/drm-usage-stats.rst | 6 ++ Documentation/gpu/i915.rst | 28 +++++++++ drivers/gpu/drm/i915/i915_driver.c | 3 + drivers/gpu/drm/i915/i915_drm_client.c | 81 ++++++++++++++++++++++++++ drivers/gpu/drm/i915/i915_drm_client.h | 4 ++ 5 files changed, 122 insertions(+)
diff --git a/Documentation/gpu/drm-usage-stats.rst b/Documentation/gpu/drm-usage-stats.rst index b8cc28f4da6f..6c9f166a8d6f 100644 --- a/Documentation/gpu/drm-usage-stats.rst +++ b/Documentation/gpu/drm-usage-stats.rst @@ -104,3 +104,9 @@ object belong to this client, in the respective memory region.
Default unit shall be bytes with optional unit specifiers of 'KiB' or 'MiB' indicating kibi- or mebi-bytes. + +=============================== +Driver specific implementations +=============================== + +:ref:`i915-usage-stats` diff --git a/Documentation/gpu/i915.rst b/Documentation/gpu/i915.rst index 0f08693d05cd..54060cd6c419 100644 --- a/Documentation/gpu/i915.rst +++ b/Documentation/gpu/i915.rst @@ -697,3 +697,31 @@ The style guide for ``i915_reg.h``.
.. kernel-doc:: drivers/gpu/drm/i915/i915_reg.h :doc: The i915 register macro definition style guide + +.. _i915-usage-stats: + +i915 DRM client usage stats implementation +========================================== + +The drm/i915 driver implements the DRM client usage stats specification as +documented in :ref:`drm-client-usage-stats`. + +Example of the output showing the implemented key value pairs and entirety of +the currently possible format options: + +:: + + pos: 0 + flags: 0100002 + mnt_id: 21 + drm-driver: i915 + drm-pdev: 0000:00:02.0 + drm-client-id: 7 + drm-engine-render: 9288864723 ns + drm-engine-copy: 2035071108 ns + drm-engine-video: 0 ns + drm-engine-capacity-video: 2 + drm-engine-video-enhance: 0 ns + +Possible `drm-engine-` key names are: `render`, `copy`, `video` and +`video-enhance`. diff --git a/drivers/gpu/drm/i915/i915_driver.c b/drivers/gpu/drm/i915/i915_driver.c index b2df273e6d7b..3ffb617d75c9 100644 --- a/drivers/gpu/drm/i915/i915_driver.c +++ b/drivers/gpu/drm/i915/i915_driver.c @@ -1745,6 +1745,9 @@ static const struct file_operations i915_driver_fops = { .read = drm_read, .compat_ioctl = i915_ioc32_compat_ioctl, .llseek = noop_llseek, +#ifdef CONFIG_PROC_FS + .show_fdinfo = i915_drm_client_fdinfo, +#endif };
static int diff --git a/drivers/gpu/drm/i915/i915_drm_client.c b/drivers/gpu/drm/i915/i915_drm_client.c index 91a8559bebf7..54b40f451959 100644 --- a/drivers/gpu/drm/i915/i915_drm_client.c +++ b/drivers/gpu/drm/i915/i915_drm_client.c @@ -7,7 +7,13 @@ #include <linux/slab.h> #include <linux/types.h>
+#include <uapi/drm/i915_drm.h> + +#include <drm/drm_print.h> + +#include "gem/i915_gem_context.h" #include "i915_drm_client.h" +#include "i915_file_private.h" #include "i915_gem.h" #include "i915_utils.h"
@@ -68,3 +74,78 @@ void i915_drm_clients_fini(struct i915_drm_clients *clients) GEM_BUG_ON(!xa_empty(&clients->xarray)); xa_destroy(&clients->xarray); } + +#ifdef CONFIG_PROC_FS +static const char * const uabi_class_names[] = { + [I915_ENGINE_CLASS_RENDER] = "render", + [I915_ENGINE_CLASS_COPY] = "copy", + [I915_ENGINE_CLASS_VIDEO] = "video", + [I915_ENGINE_CLASS_VIDEO_ENHANCE] = "video-enhance", +}; + +static u64 busy_add(struct i915_gem_context *ctx, unsigned int class) +{ + struct i915_gem_engines_iter it; + struct intel_context *ce; + u64 total = 0; + + for_each_gem_engine(ce, rcu_dereference(ctx->engines), it) { + if (ce->engine->uabi_class != class) + continue; + + total += intel_context_get_total_runtime_ns(ce); + } + + return total; +} + +static void +show_client_class(struct seq_file *m, + struct i915_drm_client *client, + unsigned int class) +{ + const struct list_head *list = &client->ctx_list; + u64 total = atomic64_read(&client->past_runtime[class]); + const unsigned int capacity = + client->clients->i915->engine_uabi_class_count[class]; + struct i915_gem_context *ctx; + + rcu_read_lock(); + list_for_each_entry_rcu(ctx, list, client_link) + total += busy_add(ctx, class); + rcu_read_unlock(); + + seq_printf(m, "drm-engine-%s:\t%llu ns\n", + uabi_class_names[class], total); + + if (capacity > 1) + seq_printf(m, "drm-engine-capacity-%s:\t%u\n", + uabi_class_names[class], + capacity); +} + +void i915_drm_client_fdinfo(struct seq_file *m, struct file *f) +{ + struct drm_file *file = f->private_data; + struct drm_i915_file_private *file_priv = file->driver_priv; + struct drm_i915_private *i915 = file_priv->dev_priv; + struct i915_drm_client *client = file_priv->client; + struct pci_dev *pdev = to_pci_dev(i915->drm.dev); + unsigned int i; + + /* + * ****************************************************************** + * For text output format description please see drm-usage-stats.rst! + * ****************************************************************** + */ + + seq_printf(m, "drm-driver:\t%s\n", i915->drm.driver->name); + seq_printf(m, "drm-pdev:\t%04x:%02x:%02x.%d\n", + pci_domain_nr(pdev->bus), pdev->bus->number, + PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn)); + seq_printf(m, "drm-client-id:\t%u\n", client->id); + + for (i = 0; i < ARRAY_SIZE(uabi_class_names); i++) + show_client_class(m, client, i); +} +#endif diff --git a/drivers/gpu/drm/i915/i915_drm_client.h b/drivers/gpu/drm/i915/i915_drm_client.h index 191368386ace..5f5b02b01ba0 100644 --- a/drivers/gpu/drm/i915/i915_drm_client.h +++ b/drivers/gpu/drm/i915/i915_drm_client.h @@ -59,6 +59,10 @@ static inline void i915_drm_client_put(struct i915_drm_client *client)
struct i915_drm_client *i915_drm_client_add(struct i915_drm_clients *clients);
+#ifdef CONFIG_PROC_FS +void i915_drm_client_fdinfo(struct seq_file *m, struct file *f); +#endif + void i915_drm_clients_fini(struct i915_drm_clients *clients);
#endif /* !__I915_DRM_CLIENT_H__ */