1 /* SPDX-License-Identifier: MIT */
3 * Copyright © 2019 Intel Corporation
6 #ifndef _I915_PERF_TYPES_H_
7 #define _I915_PERF_TYPES_H_
9 #include <linux/atomic.h>
10 #include <linux/device.h>
11 #include <linux/hrtimer.h>
12 #include <linux/llist.h>
13 #include <linux/poll.h>
14 #include <linux/sysfs.h>
15 #include <linux/types.h>
16 #include <linux/uuid.h>
17 #include <linux/wait.h>
18 #include <uapi/drm/i915_drm.h>
20 #include "gt/intel_engine_types.h"
21 #include "gt/intel_sseu.h"
22 #include "i915_reg_defs.h"
23 #include "intel_uncore.h"
24 #include "intel_wakeref.h"
26 struct drm_i915_private;
29 struct i915_gem_context;
33 struct intel_engine_cs;
37 PERF_GROUP_OAM_SAMEDIA_0 = 0,
40 PERF_GROUP_INVALID = U32_MAX,
48 struct i915_perf_regs {
50 i915_reg_t oa_head_ptr;
51 i915_reg_t oa_tail_ptr;
53 i915_reg_t oa_ctx_ctrl;
57 u32 oa_ctrl_counter_format_shift;
65 struct i915_oa_format {
69 enum report_header header;
77 struct i915_oa_config {
78 struct i915_perf *perf;
80 char uuid[UUID_STRING_LEN + 1];
83 const struct i915_oa_reg *mux_regs;
85 const struct i915_oa_reg *b_counter_regs;
86 u32 b_counter_regs_len;
87 const struct i915_oa_reg *flex_regs;
90 struct attribute_group sysfs_metric;
91 struct attribute *attrs[2];
92 struct kobj_attribute sysfs_metric_id;
98 struct i915_perf_stream;
101 * struct i915_perf_stream_ops - the OPs to support a specific stream type
103 struct i915_perf_stream_ops {
105 * @enable: Enables the collection of HW samples, either in response to
106 * `I915_PERF_IOCTL_ENABLE` or implicitly called when stream is opened
107 * without `I915_PERF_FLAG_DISABLED`.
109 void (*enable)(struct i915_perf_stream *stream);
112 * @disable: Disables the collection of HW samples, either in response
113 * to `I915_PERF_IOCTL_DISABLE` or implicitly called before destroying
116 void (*disable)(struct i915_perf_stream *stream);
119 * @poll_wait: Call poll_wait, passing a wait queue that will be woken
120 * once there is something ready to read() for the stream
122 void (*poll_wait)(struct i915_perf_stream *stream,
127 * @wait_unlocked: For handling a blocking read, wait until there is
128 * something to ready to read() for the stream. E.g. wait on the same
129 * wait queue that would be passed to poll_wait().
131 int (*wait_unlocked)(struct i915_perf_stream *stream);
134 * @read: Copy buffered metrics as records to userspace
135 * **buf**: the userspace, destination buffer
136 * **count**: the number of bytes to copy, requested by userspace
137 * **offset**: zero at the start of the read, updated as the read
138 * proceeds, it represents how many bytes have been copied so far and
139 * the buffer offset for copying the next record.
141 * Copy as many buffered i915 perf samples and records for this stream
142 * to userspace as will fit in the given buffer.
144 * Only write complete records; returning -%ENOSPC if there isn't room
145 * for a complete record.
147 * Return any error condition that results in a short read such as
148 * -%ENOSPC or -%EFAULT, even though these may be squashed before
149 * returning to userspace.
151 int (*read)(struct i915_perf_stream *stream,
157 * @destroy: Cleanup any stream specific resources.
159 * The stream will always be disabled before this is called.
161 void (*destroy)(struct i915_perf_stream *stream);
165 * struct i915_perf_stream - state for a single open stream FD
167 struct i915_perf_stream {
169 * @perf: i915_perf backpointer
171 struct i915_perf *perf;
174 * @uncore: mmio access path
176 struct intel_uncore *uncore;
179 * @engine: Engine associated with this performance stream.
181 struct intel_engine_cs *engine;
184 * @lock: Lock associated with operations on stream
189 * @sample_flags: Flags representing the `DRM_I915_PERF_PROP_SAMPLE_*`
190 * properties given when opening a stream, representing the contents
191 * of a single sample as read() by userspace.
196 * @sample_size: Considering the configured contents of a sample
197 * combined with the required header size, this is the total size
198 * of a single sample record.
203 * @ctx: %NULL if measuring system-wide across all contexts or a
204 * specific context that is being monitored.
206 struct i915_gem_context *ctx;
209 * @enabled: Whether the stream is currently enabled, considering
210 * whether the stream was opened in a disabled state and based
211 * on `I915_PERF_IOCTL_ENABLE` and `I915_PERF_IOCTL_DISABLE` calls.
216 * @hold_preemption: Whether preemption is put on hold for command
217 * submissions done on the @ctx. This is useful for some drivers that
218 * cannot easily post process the OA buffer context to subtract delta
219 * of performance counters not associated with @ctx.
221 bool hold_preemption;
224 * @ops: The callbacks providing the implementation of this specific
225 * type of configured stream.
227 const struct i915_perf_stream_ops *ops;
230 * @oa_config: The OA configuration used by the stream.
232 struct i915_oa_config *oa_config;
235 * @oa_config_bos: A list of struct i915_oa_config_bo allocated lazily
236 * each time @oa_config changes.
238 struct llist_head oa_config_bos;
241 * @pinned_ctx: The OA context specific information.
243 struct intel_context *pinned_ctx;
246 * @specific_ctx_id: The id of the specific context.
251 * @specific_ctx_id_mask: The mask used to masking specific_ctx_id bits.
253 u32 specific_ctx_id_mask;
256 * @poll_check_timer: High resolution timer that will periodically
257 * check for data in the circular OA buffer for notifying userspace
258 * (e.g. during a read() or poll()).
260 struct hrtimer poll_check_timer;
263 * @poll_wq: The wait queue that hrtimer callback wakes when it
264 * sees data ready to read in the circular OA buffer.
266 wait_queue_head_t poll_wq;
269 * @pollin: Whether there is data available to read.
274 * @periodic: Whether periodic sampling is currently enabled.
279 * @period_exponent: The OA unit sampling frequency is derived from this.
284 * @oa_buffer: State of the OA buffer.
287 const struct i915_oa_format *format;
288 struct i915_vma *vma;
293 * @oa_buffer.ptr_lock: Locks reads and writes to all
296 * Consider: the head and tail pointer state needs to be read
297 * consistently from a hrtimer callback (atomic context) and
298 * read() fop (user context) with tail pointer updates happening
299 * in atomic context and head updates in user context and the
300 * (unlikely) possibility of read() errors needing to reset all
303 * Note: Contention/performance aren't currently a significant
304 * concern here considering the relatively low frequency of
305 * hrtimer callbacks (5ms period) and that reads typically only
306 * happen in response to a hrtimer event and likely complete
307 * before the next callback.
309 * Note: This lock is not held *while* reading and copying data
310 * to userspace so the value of head observed in htrimer
311 * callbacks won't represent any partial consumption of data.
316 * @oa_buffer.head: Although we can always read back
317 * the head pointer register,
318 * we prefer to avoid trusting the HW state, just to avoid any
319 * risk that some hardware condition could * somehow bump the
320 * head pointer unpredictably and cause us to forward the wrong
321 * OA buffer data to userspace.
326 * @oa_buffer.tail: The last verified tail that can be
333 * @noa_wait: A batch buffer doing a wait on the GPU for the NOA logic to be
336 struct i915_vma *noa_wait;
339 * @poll_oa_period: The period in nanoseconds at which the OA
340 * buffer should be checked for available data.
346 * struct i915_oa_ops - Gen specific implementation of an OA unit stream
350 * @is_valid_b_counter_reg: Validates register's address for
351 * programming boolean counters for a particular platform.
353 bool (*is_valid_b_counter_reg)(struct i915_perf *perf, u32 addr);
356 * @is_valid_mux_reg: Validates register's address for programming mux
357 * for a particular platform.
359 bool (*is_valid_mux_reg)(struct i915_perf *perf, u32 addr);
362 * @is_valid_flex_reg: Validates register's address for programming
363 * flex EU filtering for a particular platform.
365 bool (*is_valid_flex_reg)(struct i915_perf *perf, u32 addr);
368 * @enable_metric_set: Selects and applies any MUX configuration to set
369 * up the Boolean and Custom (B/C) counters that are part of the
370 * counter reports being sampled. May apply system constraints such as
371 * disabling EU clock gating as required.
373 int (*enable_metric_set)(struct i915_perf_stream *stream,
374 struct i915_active *active);
377 * @disable_metric_set: Remove system constraints associated with using
380 void (*disable_metric_set)(struct i915_perf_stream *stream);
383 * @oa_enable: Enable periodic sampling
385 void (*oa_enable)(struct i915_perf_stream *stream);
388 * @oa_disable: Disable periodic sampling
390 void (*oa_disable)(struct i915_perf_stream *stream);
393 * @read: Copy data from the circular OA buffer into a given userspace
396 int (*read)(struct i915_perf_stream *stream,
402 * @oa_hw_tail_read: read the OA tail pointer register
404 * In particular this enables us to share all the fiddly code for
405 * handling the OA unit tail pointer race that affects multiple
408 u32 (*oa_hw_tail_read)(struct i915_perf_stream *stream);
411 struct i915_perf_group {
413 * @exclusive_stream: The stream currently using the OA unit. This is
414 * sometimes accessed outside a syscall associated to its file
417 struct i915_perf_stream *exclusive_stream;
420 * @num_engines: The number of engines using this OA unit.
425 * @regs: OA buffer register group for programming the OA unit.
427 struct i915_perf_regs regs;
430 * @type: Type of OA unit - OAM, OAG etc.
435 struct i915_perf_gt {
437 * Lock associated with anything below within this structure.
442 * @sseu: sseu configuration selected to run while perf is active,
443 * applies to all contexts.
445 struct intel_sseu sseu;
448 * @num_perf_groups: number of perf groups per gt.
453 * @group: list of OA groups - one for each OA buffer.
455 struct i915_perf_group *group;
459 struct drm_i915_private *i915;
461 struct kobject *metrics_kobj;
464 * Lock associated with adding/modifying/removing OA configs
465 * in perf->metrics_idr.
467 struct mutex metrics_lock;
470 * List of dynamic configurations (struct i915_oa_config), you
471 * need to hold perf->metrics_lock to access it.
473 struct idr metrics_idr;
476 * For rate limiting any notifications of spurious
479 struct ratelimit_state spurious_report_rs;
482 * For rate limiting any notifications of tail pointer
485 struct ratelimit_state tail_pointer_race;
487 u32 gen7_latched_oastatus1;
488 u32 ctx_oactxctrl_offset;
489 u32 ctx_flexeu0_offset;
492 * The RPT_ID/reason field for Gen8+ includes a bit
493 * to determine if the CTX ID in the report is valid
494 * but the specific bit differs between Gen 8 and 9
496 u32 gen8_valid_ctx_bit;
498 struct i915_oa_ops ops;
499 const struct i915_oa_format *oa_formats;
502 * Use a format mask to store the supported formats
505 #define FORMAT_MASK_SIZE DIV_ROUND_UP(I915_OA_FORMAT_MAX - 1, BITS_PER_LONG)
506 unsigned long format_mask[FORMAT_MASK_SIZE];
508 atomic64_t noa_programming_delay;
511 #endif /* _I915_PERF_TYPES_H_ */