1 // SPDX-License-Identifier: MIT
2 /*
3 * Copyright © 2020,2021 Intel Corporation
4 */
5
6 #include "i915_drv.h"
7 #include "intel_step.h"
8
9 /*
10 * Some platforms have unusual ways of mapping PCI revision ID to GT/display
11 * steppings. E.g., in some cases a higher PCI revision may translate to a
12 * lower stepping of the GT and/or display IP. This file provides lookup
13 * tables to map the PCI revision into a standard set of stepping values that
14 * can be compared numerically.
15 *
16 * Also note that some revisions/steppings may have been set aside as
17 * placeholders but never materialized in real hardware; in those cases there
18 * may be jumps in the revision IDs or stepping values in the tables below.
19 */
20
21 /*
22 * Some platforms always have the same stepping value for GT and display;
23 * use a macro to define these to make it easier to identify the platforms
24 * where the two steppings can deviate.
25 */
26 #define COMMON_STEP(x) .graphics_step = STEP_##x, .display_step = STEP_##x, .media_step = STEP_##x
27 #define COMMON_GT_MEDIA_STEP(x) .graphics_step = STEP_##x, .media_step = STEP_##x
28
29 static const struct intel_step_info skl_revids[] = {
30 [0x6] = { COMMON_STEP(G0) },
31 [0x7] = { COMMON_STEP(H0) },
32 [0x9] = { COMMON_STEP(J0) },
33 [0xA] = { COMMON_STEP(I1) },
34 };
35
36 static const struct intel_step_info kbl_revids[] = {
37 [1] = { COMMON_GT_MEDIA_STEP(B0), .display_step = STEP_B0 },
38 [2] = { COMMON_GT_MEDIA_STEP(C0), .display_step = STEP_B0 },
39 [3] = { COMMON_GT_MEDIA_STEP(D0), .display_step = STEP_B0 },
40 [4] = { COMMON_GT_MEDIA_STEP(F0), .display_step = STEP_C0 },
41 [5] = { COMMON_GT_MEDIA_STEP(C0), .display_step = STEP_B1 },
42 [6] = { COMMON_GT_MEDIA_STEP(D1), .display_step = STEP_B1 },
43 [7] = { COMMON_GT_MEDIA_STEP(G0), .display_step = STEP_C0 },
44 };
45
46 static const struct intel_step_info bxt_revids[] = {
47 [0xA] = { COMMON_STEP(C0) },
48 [0xB] = { COMMON_STEP(C0) },
49 [0xC] = { COMMON_STEP(D0) },
50 [0xD] = { COMMON_STEP(E0) },
51 };
52
53 static const struct intel_step_info glk_revids[] = {
54 [3] = { COMMON_STEP(B0) },
55 };
56
57 static const struct intel_step_info icl_revids[] = {
58 [7] = { COMMON_STEP(D0) },
59 };
60
61 static const struct intel_step_info jsl_ehl_revids[] = {
62 [0] = { COMMON_STEP(A0) },
63 [1] = { COMMON_STEP(B0) },
64 };
65
66 static const struct intel_step_info tgl_uy_revids[] = {
67 [0] = { COMMON_GT_MEDIA_STEP(A0), .display_step = STEP_A0 },
68 [1] = { COMMON_GT_MEDIA_STEP(B0), .display_step = STEP_C0 },
69 [2] = { COMMON_GT_MEDIA_STEP(B1), .display_step = STEP_C0 },
70 [3] = { COMMON_GT_MEDIA_STEP(C0), .display_step = STEP_D0 },
71 };
72
73 /* Same GT stepping between tgl_uy_revids and tgl_revids don't mean the same HW */
74 static const struct intel_step_info tgl_revids[] = {
75 [0] = { COMMON_GT_MEDIA_STEP(A0), .display_step = STEP_B0 },
76 [1] = { COMMON_GT_MEDIA_STEP(B0), .display_step = STEP_D0 },
77 };
78
79 static const struct intel_step_info rkl_revids[] = {
80 [0] = { COMMON_STEP(A0) },
81 [1] = { COMMON_STEP(B0) },
82 [4] = { COMMON_STEP(C0) },
83 };
84
85 static const struct intel_step_info dg1_revids[] = {
86 [0] = { COMMON_STEP(A0) },
87 [1] = { COMMON_STEP(B0) },
88 };
89
90 static const struct intel_step_info adls_revids[] = {
91 [0x0] = { COMMON_GT_MEDIA_STEP(A0), .display_step = STEP_A0 },
92 [0x1] = { COMMON_GT_MEDIA_STEP(A0), .display_step = STEP_A2 },
93 [0x4] = { COMMON_GT_MEDIA_STEP(B0), .display_step = STEP_B0 },
94 [0x8] = { COMMON_GT_MEDIA_STEP(C0), .display_step = STEP_B0 },
95 [0xC] = { COMMON_GT_MEDIA_STEP(D0), .display_step = STEP_C0 },
96 };
97
98 static const struct intel_step_info adlp_revids[] = {
99 [0x0] = { COMMON_GT_MEDIA_STEP(A0), .display_step = STEP_A0 },
100 [0x4] = { COMMON_GT_MEDIA_STEP(B0), .display_step = STEP_B0 },
101 [0x8] = { COMMON_GT_MEDIA_STEP(C0), .display_step = STEP_C0 },
102 [0xC] = { COMMON_GT_MEDIA_STEP(C0), .display_step = STEP_D0 },
103 };
104
105 static const struct intel_step_info xehpsdv_revids[] = {
106 [0x0] = { COMMON_GT_MEDIA_STEP(A0) },
107 [0x1] = { COMMON_GT_MEDIA_STEP(A1) },
108 [0x4] = { COMMON_GT_MEDIA_STEP(B0) },
109 [0x8] = { COMMON_GT_MEDIA_STEP(C0) },
110 };
111
112 static const struct intel_step_info dg2_g10_revid_step_tbl[] = {
113 [0x0] = { COMMON_GT_MEDIA_STEP(A0), .display_step = STEP_A0 },
114 [0x1] = { COMMON_GT_MEDIA_STEP(A1), .display_step = STEP_A0 },
115 [0x4] = { COMMON_GT_MEDIA_STEP(B0), .display_step = STEP_B0 },
116 [0x8] = { COMMON_GT_MEDIA_STEP(C0), .display_step = STEP_C0 },
117 };
118
119 static const struct intel_step_info dg2_g11_revid_step_tbl[] = {
120 [0x0] = { COMMON_GT_MEDIA_STEP(A0), .display_step = STEP_B0 },
121 [0x4] = { COMMON_GT_MEDIA_STEP(B0), .display_step = STEP_C0 },
122 [0x5] = { COMMON_GT_MEDIA_STEP(B1), .display_step = STEP_C0 },
123 };
124
125 static const struct intel_step_info dg2_g12_revid_step_tbl[] = {
126 [0x0] = { COMMON_GT_MEDIA_STEP(A0), .display_step = STEP_C0 },
127 };
128
129 static const struct intel_step_info adls_rpls_revids[] = {
130 [0x4] = { COMMON_GT_MEDIA_STEP(D0), .display_step = STEP_D0 },
131 [0xC] = { COMMON_GT_MEDIA_STEP(D0), .display_step = STEP_C0 },
132 };
133
134 static const struct intel_step_info adlp_n_revids[] = {
135 [0x0] = { COMMON_GT_MEDIA_STEP(A0), .display_step = STEP_D0 },
136 };
137
138 static void pvc_step_init(struct drm_i915_private *i915, int pci_revid);
139
intel_step_init(struct drm_i915_private * i915)140 void intel_step_init(struct drm_i915_private *i915)
141 {
142 const struct intel_step_info *revids = NULL;
143 int size = 0;
144 int revid = INTEL_REVID(i915);
145 struct intel_step_info step = {};
146
147 if (IS_PONTEVECCHIO(i915)) {
148 pvc_step_init(i915, revid);
149 return;
150 } else if (IS_DG2_G10(i915)) {
151 revids = dg2_g10_revid_step_tbl;
152 size = ARRAY_SIZE(dg2_g10_revid_step_tbl);
153 } else if (IS_DG2_G11(i915)) {
154 revids = dg2_g11_revid_step_tbl;
155 size = ARRAY_SIZE(dg2_g11_revid_step_tbl);
156 } else if (IS_DG2_G12(i915)) {
157 revids = dg2_g12_revid_step_tbl;
158 size = ARRAY_SIZE(dg2_g12_revid_step_tbl);
159 } else if (IS_XEHPSDV(i915)) {
160 revids = xehpsdv_revids;
161 size = ARRAY_SIZE(xehpsdv_revids);
162 } else if (IS_ADLP_N(i915)) {
163 revids = adlp_n_revids;
164 size = ARRAY_SIZE(adlp_n_revids);
165 } else if (IS_ALDERLAKE_P(i915)) {
166 revids = adlp_revids;
167 size = ARRAY_SIZE(adlp_revids);
168 } else if (IS_ADLS_RPLS(i915)) {
169 revids = adls_rpls_revids;
170 size = ARRAY_SIZE(adls_rpls_revids);
171 } else if (IS_ALDERLAKE_S(i915)) {
172 revids = adls_revids;
173 size = ARRAY_SIZE(adls_revids);
174 } else if (IS_DG1(i915)) {
175 revids = dg1_revids;
176 size = ARRAY_SIZE(dg1_revids);
177 } else if (IS_ROCKETLAKE(i915)) {
178 revids = rkl_revids;
179 size = ARRAY_SIZE(rkl_revids);
180 } else if (IS_TGL_UY(i915)) {
181 revids = tgl_uy_revids;
182 size = ARRAY_SIZE(tgl_uy_revids);
183 } else if (IS_TIGERLAKE(i915)) {
184 revids = tgl_revids;
185 size = ARRAY_SIZE(tgl_revids);
186 } else if (IS_JSL_EHL(i915)) {
187 revids = jsl_ehl_revids;
188 size = ARRAY_SIZE(jsl_ehl_revids);
189 } else if (IS_ICELAKE(i915)) {
190 revids = icl_revids;
191 size = ARRAY_SIZE(icl_revids);
192 } else if (IS_GEMINILAKE(i915)) {
193 revids = glk_revids;
194 size = ARRAY_SIZE(glk_revids);
195 } else if (IS_BROXTON(i915)) {
196 revids = bxt_revids;
197 size = ARRAY_SIZE(bxt_revids);
198 } else if (IS_KABYLAKE(i915)) {
199 revids = kbl_revids;
200 size = ARRAY_SIZE(kbl_revids);
201 } else if (IS_SKYLAKE(i915)) {
202 revids = skl_revids;
203 size = ARRAY_SIZE(skl_revids);
204 }
205
206 /* Not using the stepping scheme for the platform yet. */
207 if (!revids)
208 return;
209
210 if (revid < size && revids[revid].graphics_step != STEP_NONE) {
211 step = revids[revid];
212 } else {
213 drm_warn(&i915->drm, "Unknown revid 0x%02x\n", revid);
214
215 /*
216 * If we hit a gap in the revid array, use the information for
217 * the next revid.
218 *
219 * This may be wrong in all sorts of ways, especially if the
220 * steppings in the array are not monotonically increasing, but
221 * it's better than defaulting to 0.
222 */
223 while (revid < size && revids[revid].graphics_step == STEP_NONE)
224 revid++;
225
226 if (revid < size) {
227 drm_dbg(&i915->drm, "Using steppings for revid 0x%02x\n",
228 revid);
229 step = revids[revid];
230 } else {
231 drm_dbg(&i915->drm, "Using future steppings\n");
232 step.graphics_step = STEP_FUTURE;
233 step.display_step = STEP_FUTURE;
234 }
235 }
236
237 if (drm_WARN_ON(&i915->drm, step.graphics_step == STEP_NONE))
238 return;
239
240 RUNTIME_INFO(i915)->step = step;
241 }
242
243 #define PVC_BD_REVID GENMASK(5, 3)
244 #define PVC_CT_REVID GENMASK(2, 0)
245
246 static const int pvc_bd_subids[] = {
247 [0x0] = STEP_A0,
248 [0x3] = STEP_B0,
249 [0x4] = STEP_B1,
250 [0x5] = STEP_B3,
251 };
252
253 static const int pvc_ct_subids[] = {
254 [0x3] = STEP_A0,
255 [0x5] = STEP_B0,
256 [0x6] = STEP_B1,
257 [0x7] = STEP_C0,
258 };
259
260 static int
pvc_step_lookup(struct drm_i915_private * i915,const char * type,const int * table,int size,int subid)261 pvc_step_lookup(struct drm_i915_private *i915, const char *type,
262 const int *table, int size, int subid)
263 {
264 if (subid < size && table[subid] != STEP_NONE)
265 return table[subid];
266
267 drm_warn(&i915->drm, "Unknown %s id 0x%02x\n", type, subid);
268
269 /*
270 * As on other platforms, try to use the next higher ID if we land on a
271 * gap in the table.
272 */
273 while (subid < size && table[subid] == STEP_NONE)
274 subid++;
275
276 if (subid < size) {
277 drm_dbg(&i915->drm, "Using steppings for %s id 0x%02x\n",
278 type, subid);
279 return table[subid];
280 }
281
282 drm_dbg(&i915->drm, "Using future steppings\n");
283 return STEP_FUTURE;
284 }
285
286 /*
287 * PVC needs special handling since we don't lookup the
288 * revid in a table, but rather specific bitfields within
289 * the revid for various components.
290 */
pvc_step_init(struct drm_i915_private * i915,int pci_revid)291 static void pvc_step_init(struct drm_i915_private *i915, int pci_revid)
292 {
293 int ct_subid, bd_subid;
294
295 bd_subid = FIELD_GET(PVC_BD_REVID, pci_revid);
296 ct_subid = FIELD_GET(PVC_CT_REVID, pci_revid);
297
298 RUNTIME_INFO(i915)->step.basedie_step =
299 pvc_step_lookup(i915, "Base Die", pvc_bd_subids,
300 ARRAY_SIZE(pvc_bd_subids), bd_subid);
301 RUNTIME_INFO(i915)->step.graphics_step =
302 pvc_step_lookup(i915, "Compute Tile", pvc_ct_subids,
303 ARRAY_SIZE(pvc_ct_subids), ct_subid);
304 }
305
306 #define STEP_NAME_CASE(name) \
307 case STEP_##name: \
308 return #name;
309
intel_step_name(enum intel_step step)310 const char *intel_step_name(enum intel_step step)
311 {
312 switch (step) {
313 STEP_NAME_LIST(STEP_NAME_CASE);
314
315 default:
316 return "**";
317 }
318 }
319