1// SPDX-License-Identifier: MIT
2/*
3 * Copyright © 2022 Intel Corporation
4 */
5
6#include "xe_rtp.h"
7
8#include <kunit/visibility.h>
9
10#include <uapi/drm/xe_drm.h>
11
12#include "xe_configfs.h"
13#include "xe_gt.h"
14#include "xe_gt_topology.h"
15#include "xe_macros.h"
16#include "xe_reg_sr.h"
17#include "xe_sriov.h"
18
19/**
20 * DOC: Register Table Processing
21 *
22 * Internal infrastructure to define how registers should be updated based on
23 * rules and actions. This can be used to define tables with multiple entries
24 * (one per register) that will be walked over at some point in time to apply
25 * the values to the registers that have matching rules.
26 */
27
28static bool has_samedia(const struct xe_device *xe)
29{
30 return xe->info.media_verx100 >= 1300;
31}
32
33static bool rule_matches(const struct xe_device *xe,
34 struct xe_gt *gt,
35 struct xe_hw_engine *hwe,
36 const struct xe_rtp_rule *rules,
37 unsigned int n_rules)
38{
39 const struct xe_rtp_rule *r;
40 unsigned int i, rcount = 0;
41 bool match;
42
43 for (r = rules, i = 0; i < n_rules; r = &rules[++i]) {
44 switch (r->match_type) {
45 case XE_RTP_MATCH_OR:
46 /*
47 * This is only reached if a complete set of
48 * rules passed or none were evaluated. For both cases,
49 * shortcut the other rules and return the proper value.
50 */
51 goto done;
52 case XE_RTP_MATCH_PLATFORM:
53 match = xe->info.platform == r->platform;
54 break;
55 case XE_RTP_MATCH_SUBPLATFORM:
56 match = xe->info.platform == r->platform &&
57 xe->info.subplatform == r->subplatform;
58 break;
59 case XE_RTP_MATCH_GRAPHICS_VERSION:
60 if (drm_WARN_ON(&xe->drm, !gt))
61 return false;
62
63 match = xe->info.graphics_verx100 == r->ver_start &&
64 (!has_samedia(xe) || !xe_gt_is_media_type(gt));
65 break;
66 case XE_RTP_MATCH_GRAPHICS_VERSION_RANGE:
67 if (drm_WARN_ON(&xe->drm, !gt))
68 return false;
69
70 match = xe->info.graphics_verx100 >= r->ver_start &&
71 xe->info.graphics_verx100 <= r->ver_end &&
72 (!has_samedia(xe) || !xe_gt_is_media_type(gt));
73 break;
74 case XE_RTP_MATCH_GRAPHICS_VERSION_ANY_GT:
75 if (drm_WARN_ON(&xe->drm, !gt))
76 return false;
77
78 match = xe->info.graphics_verx100 == r->ver_start;
79 break;
80 case XE_RTP_MATCH_GRAPHICS_STEP:
81 if (drm_WARN_ON(&xe->drm, !gt))
82 return false;
83
84 match = xe->info.step.graphics >= r->step_start &&
85 xe->info.step.graphics < r->step_end &&
86 (!has_samedia(xe) || !xe_gt_is_media_type(gt));
87 break;
88 case XE_RTP_MATCH_MEDIA_VERSION:
89 if (drm_WARN_ON(&xe->drm, !gt))
90 return false;
91
92 match = xe->info.media_verx100 == r->ver_start &&
93 (!has_samedia(xe) || xe_gt_is_media_type(gt));
94 break;
95 case XE_RTP_MATCH_MEDIA_VERSION_RANGE:
96 if (drm_WARN_ON(&xe->drm, !gt))
97 return false;
98
99 match = xe->info.media_verx100 >= r->ver_start &&
100 xe->info.media_verx100 <= r->ver_end &&
101 (!has_samedia(xe) || xe_gt_is_media_type(gt));
102 break;
103 case XE_RTP_MATCH_MEDIA_STEP:
104 if (drm_WARN_ON(&xe->drm, !gt))
105 return false;
106
107 match = xe->info.step.media >= r->step_start &&
108 xe->info.step.media < r->step_end &&
109 (!has_samedia(xe) || xe_gt_is_media_type(gt));
110 break;
111 case XE_RTP_MATCH_MEDIA_VERSION_ANY_GT:
112 if (drm_WARN_ON(&xe->drm, !gt))
113 return false;
114
115 match = xe->info.media_verx100 == r->ver_start;
116 break;
117 case XE_RTP_MATCH_INTEGRATED:
118 match = !xe->info.is_dgfx;
119 break;
120 case XE_RTP_MATCH_DISCRETE:
121 match = xe->info.is_dgfx;
122 break;
123 case XE_RTP_MATCH_ENGINE_CLASS:
124 if (drm_WARN_ON(&xe->drm, !hwe))
125 return false;
126
127 match = hwe->class == r->engine_class;
128 break;
129 case XE_RTP_MATCH_NOT_ENGINE_CLASS:
130 if (drm_WARN_ON(&xe->drm, !hwe))
131 return false;
132
133 match = hwe->class != r->engine_class;
134 break;
135 case XE_RTP_MATCH_FUNC:
136 match = r->match_func(xe, gt, hwe);
137 break;
138 default:
139 drm_warn(&xe->drm, "Invalid RTP match %u\n",
140 r->match_type);
141 match = false;
142 }
143
144 if (!match) {
145 /*
146 * Advance rules until we find XE_RTP_MATCH_OR to check
147 * if there's another set of conditions to check
148 */
149 while (++i < n_rules && rules[i].match_type != XE_RTP_MATCH_OR)
150 ;
151
152 if (i >= n_rules)
153 return false;
154
155 rcount = 0;
156 } else {
157 rcount++;
158 }
159 }
160
161done:
162 if (drm_WARN_ON(&xe->drm, !rcount))
163 return false;
164
165 return true;
166}
167
168static void rtp_add_sr_entry(const struct xe_rtp_action *action,
169 struct xe_gt *gt,
170 u32 mmio_base,
171 struct xe_reg_sr *sr)
172{
173 struct xe_reg_sr_entry sr_entry = {
174 .reg = action->reg,
175 .clr_bits = action->clr_bits,
176 .set_bits = action->set_bits,
177 .read_mask = action->read_mask,
178 };
179
180 sr_entry.reg.addr += mmio_base;
181 xe_reg_sr_add(sr, e: &sr_entry, gt);
182}
183
184static bool rtp_process_one_sr(const struct xe_rtp_entry_sr *entry,
185 struct xe_device *xe, struct xe_gt *gt,
186 struct xe_hw_engine *hwe, struct xe_reg_sr *sr)
187{
188 const struct xe_rtp_action *action;
189 u32 mmio_base;
190 unsigned int i;
191
192 if (!rule_matches(xe, gt, hwe, rules: entry->rules, n_rules: entry->n_rules))
193 return false;
194
195 for (i = 0, action = &entry->actions[0]; i < entry->n_actions; action++, i++) {
196 if ((entry->flags & XE_RTP_ENTRY_FLAG_FOREACH_ENGINE) ||
197 (action->flags & XE_RTP_ACTION_FLAG_ENGINE_BASE))
198 mmio_base = hwe->mmio_base;
199 else
200 mmio_base = 0;
201
202 rtp_add_sr_entry(action, gt, mmio_base, sr);
203 }
204
205 return true;
206}
207
208static void rtp_get_context(struct xe_rtp_process_ctx *ctx,
209 struct xe_hw_engine **hwe,
210 struct xe_gt **gt,
211 struct xe_device **xe)
212{
213 switch (ctx->type) {
214 case XE_RTP_PROCESS_TYPE_DEVICE:
215 *hwe = NULL;
216 *gt = NULL;
217 *xe = ctx->xe;
218 break;
219 case XE_RTP_PROCESS_TYPE_GT:
220 *hwe = NULL;
221 *gt = ctx->gt;
222 *xe = gt_to_xe(*gt);
223 break;
224 case XE_RTP_PROCESS_TYPE_ENGINE:
225 *hwe = ctx->hwe;
226 *gt = (*hwe)->gt;
227 *xe = gt_to_xe(*gt);
228 break;
229 }
230}
231
232/**
233 * xe_rtp_process_ctx_enable_active_tracking - Enable tracking of active entries
234 *
235 * Set additional metadata to track what entries are considered "active", i.e.
236 * their rules match the condition. Bits are never cleared: entries with
237 * matching rules set the corresponding bit in the bitmap.
238 *
239 * @ctx: The context for processing the table
240 * @active_entries: bitmap to store the active entries
241 * @n_entries: number of entries to be processed
242 */
243void xe_rtp_process_ctx_enable_active_tracking(struct xe_rtp_process_ctx *ctx,
244 unsigned long *active_entries,
245 size_t n_entries)
246{
247 ctx->active_entries = active_entries;
248 ctx->n_entries = n_entries;
249}
250EXPORT_SYMBOL_IF_KUNIT(xe_rtp_process_ctx_enable_active_tracking);
251
252static void rtp_mark_active(struct xe_device *xe,
253 struct xe_rtp_process_ctx *ctx,
254 unsigned int idx)
255{
256 if (!ctx->active_entries)
257 return;
258
259 if (drm_WARN_ON(&xe->drm, idx >= ctx->n_entries))
260 return;
261
262 bitmap_set(map: ctx->active_entries, start: idx, nbits: 1);
263}
264
265/**
266 * xe_rtp_process_to_sr - Process all rtp @entries, adding the matching ones to
267 * the save-restore argument.
268 * @ctx: The context for processing the table, with one of device, gt or hwe
269 * @entries: Table with RTP definitions
270 * @n_entries: Number of entries to process, usually ARRAY_SIZE(entries)
271 * @sr: Save-restore struct where matching rules execute the action. This can be
272 * viewed as the "coalesced view" of multiple the tables. The bits for each
273 * register set are expected not to collide with previously added entries
274 *
275 * Walk the table pointed by @entries (with an empty sentinel) and add all
276 * entries with matching rules to @sr. If @hwe is not NULL, its mmio_base is
277 * used to calculate the right register offset
278 */
279void xe_rtp_process_to_sr(struct xe_rtp_process_ctx *ctx,
280 const struct xe_rtp_entry_sr *entries,
281 size_t n_entries,
282 struct xe_reg_sr *sr)
283{
284 const struct xe_rtp_entry_sr *entry;
285 struct xe_hw_engine *hwe = NULL;
286 struct xe_gt *gt = NULL;
287 struct xe_device *xe = NULL;
288
289 rtp_get_context(ctx, hwe: &hwe, gt: &gt, xe: &xe);
290
291 xe_assert(xe, entries);
292
293 for (entry = entries; entry - entries < n_entries; entry++) {
294 bool match = false;
295
296 if (entry->flags & XE_RTP_ENTRY_FLAG_FOREACH_ENGINE) {
297 struct xe_hw_engine *each_hwe;
298 enum xe_hw_engine_id id;
299
300 for_each_hw_engine(each_hwe, gt, id)
301 match |= rtp_process_one_sr(entry, xe, gt,
302 hwe: each_hwe, sr);
303 } else {
304 match = rtp_process_one_sr(entry, xe, gt, hwe, sr);
305 }
306
307 if (match)
308 rtp_mark_active(xe, ctx, idx: entry - entries);
309 }
310}
311EXPORT_SYMBOL_IF_KUNIT(xe_rtp_process_to_sr);
312
313/**
314 * xe_rtp_process - Process all rtp @entries, without running any action
315 * @ctx: The context for processing the table, with one of device, gt or hwe
316 * @entries: Table with RTP definitions
317 *
318 * Walk the table pointed by @entries (with an empty sentinel), executing the
319 * rules. One difference from xe_rtp_process_to_sr(): there is no action
320 * associated with each entry since this uses struct xe_rtp_entry. Its main use
321 * is for marking active workarounds via
322 * xe_rtp_process_ctx_enable_active_tracking().
323 */
324void xe_rtp_process(struct xe_rtp_process_ctx *ctx,
325 const struct xe_rtp_entry *entries)
326{
327 const struct xe_rtp_entry *entry;
328 struct xe_hw_engine *hwe;
329 struct xe_gt *gt;
330 struct xe_device *xe;
331
332 rtp_get_context(ctx, hwe: &hwe, gt: &gt, xe: &xe);
333
334 for (entry = entries; entry && entry->rules; entry++) {
335 if (!rule_matches(xe, gt, hwe, rules: entry->rules, n_rules: entry->n_rules))
336 continue;
337
338 rtp_mark_active(xe, ctx, idx: entry - entries);
339 }
340}
341EXPORT_SYMBOL_IF_KUNIT(xe_rtp_process);
342
343bool xe_rtp_match_even_instance(const struct xe_device *xe,
344 const struct xe_gt *gt,
345 const struct xe_hw_engine *hwe)
346{
347 return hwe->instance % 2 == 0;
348}
349
350bool xe_rtp_match_first_render_or_compute(const struct xe_device *xe,
351 const struct xe_gt *gt,
352 const struct xe_hw_engine *hwe)
353{
354 u64 render_compute_mask = gt->info.engine_mask &
355 (XE_HW_ENGINE_CCS_MASK | XE_HW_ENGINE_RCS_MASK);
356
357 return render_compute_mask &&
358 hwe->engine_id == __ffs(render_compute_mask);
359}
360
361bool xe_rtp_match_not_sriov_vf(const struct xe_device *xe,
362 const struct xe_gt *gt,
363 const struct xe_hw_engine *hwe)
364{
365 return !IS_SRIOV_VF(xe);
366}
367
368bool xe_rtp_match_psmi_enabled(const struct xe_device *xe,
369 const struct xe_gt *gt,
370 const struct xe_hw_engine *hwe)
371{
372 return xe_configfs_get_psmi_enabled(to_pci_dev(xe->drm.dev));
373}
374
375bool xe_rtp_match_gt_has_discontiguous_dss_groups(const struct xe_device *xe,
376 const struct xe_gt *gt,
377 const struct xe_hw_engine *hwe)
378{
379 return xe_gt_has_discontiguous_dss_groups(gt);
380}
381
382bool xe_rtp_match_has_flat_ccs(const struct xe_device *xe,
383 const struct xe_gt *gt,
384 const struct xe_hw_engine *hwe)
385{
386 return xe->info.has_flat_ccs;
387}
388

source code of linux/drivers/gpu/drm/xe/xe_rtp.c