Bug Summary

File:dev/pci/drm/i915/display/intel_bw.c
Warning:line 460, column 13
Division by zero

Annotated Source Code

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clang -cc1 -cc1 -triple amd64-unknown-openbsd7.4 -analyze -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name intel_bw.c -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model static -mframe-pointer=all -relaxed-aliasing -ffp-contract=on -fno-rounding-math -mconstructor-aliases -ffreestanding -mcmodel=kernel -target-cpu x86-64 -target-feature +retpoline-indirect-calls -target-feature +retpoline-indirect-branches -target-feature -sse2 -target-feature -sse -target-feature -3dnow -target-feature -mmx -target-feature +save-args -target-feature +retpoline-external-thunk -disable-red-zone -no-implicit-float -tune-cpu generic -debugger-tuning=gdb -fcoverage-compilation-dir=/usr/src/sys/arch/amd64/compile/GENERIC.MP/obj -nostdsysteminc -nobuiltininc -resource-dir /usr/local/llvm16/lib/clang/16 -I /usr/src/sys -I /usr/src/sys/arch/amd64/compile/GENERIC.MP/obj -I /usr/src/sys/arch -I /usr/src/sys/dev/pci/drm/include -I /usr/src/sys/dev/pci/drm/include/uapi -I /usr/src/sys/dev/pci/drm/amd/include/asic_reg -I /usr/src/sys/dev/pci/drm/amd/include -I /usr/src/sys/dev/pci/drm/amd/amdgpu -I /usr/src/sys/dev/pci/drm/amd/display -I /usr/src/sys/dev/pci/drm/amd/display/include -I /usr/src/sys/dev/pci/drm/amd/display/dc -I /usr/src/sys/dev/pci/drm/amd/display/amdgpu_dm -I /usr/src/sys/dev/pci/drm/amd/pm/inc -I /usr/src/sys/dev/pci/drm/amd/pm/legacy-dpm -I /usr/src/sys/dev/pci/drm/amd/pm/swsmu -I /usr/src/sys/dev/pci/drm/amd/pm/swsmu/inc -I /usr/src/sys/dev/pci/drm/amd/pm/swsmu/smu11 -I /usr/src/sys/dev/pci/drm/amd/pm/swsmu/smu12 -I /usr/src/sys/dev/pci/drm/amd/pm/swsmu/smu13 -I /usr/src/sys/dev/pci/drm/amd/pm/powerplay/inc -I /usr/src/sys/dev/pci/drm/amd/pm/powerplay/hwmgr -I /usr/src/sys/dev/pci/drm/amd/pm/powerplay/smumgr -I /usr/src/sys/dev/pci/drm/amd/pm/swsmu/inc -I /usr/src/sys/dev/pci/drm/amd/pm/swsmu/inc/pmfw_if -I /usr/src/sys/dev/pci/drm/amd/display/dc/inc -I /usr/src/sys/dev/pci/drm/amd/display/dc/inc/hw -I /usr/src/sys/dev/pci/drm/amd/display/dc/clk_mgr -I /usr/src/sys/dev/pci/drm/amd/display/modules/inc -I /usr/src/sys/dev/pci/drm/amd/display/modules/hdcp -I /usr/src/sys/dev/pci/drm/amd/display/dmub/inc -I /usr/src/sys/dev/pci/drm/i915 -D DDB -D DIAGNOSTIC -D KTRACE -D ACCOUNTING -D KMEMSTATS -D PTRACE -D POOL_DEBUG -D CRYPTO -D SYSVMSG -D SYSVSEM -D SYSVSHM -D UVM_SWAP_ENCRYPT -D FFS -D FFS2 -D FFS_SOFTUPDATES -D UFS_DIRHASH -D QUOTA -D EXT2FS -D MFS -D NFSCLIENT -D NFSSERVER -D CD9660 -D UDF -D MSDOSFS -D FIFO -D FUSE -D SOCKET_SPLICE -D TCP_ECN -D TCP_SIGNATURE -D INET6 -D IPSEC -D PPP_BSDCOMP -D PPP_DEFLATE -D PIPEX -D MROUTING -D MPLS -D BOOT_CONFIG -D USER_PCICONF -D APERTURE -D MTRR -D NTFS -D SUSPEND -D HIBERNATE -D PCIVERBOSE -D USBVERBOSE -D WSDISPLAY_COMPAT_USL -D WSDISPLAY_COMPAT_RAWKBD -D WSDISPLAY_DEFAULTSCREENS=6 -D X86EMU -D ONEWIREVERBOSE -D MULTIPROCESSOR -D MAXUSERS=80 -D _KERNEL -O2 -Wno-pointer-sign -Wno-address-of-packed-member -Wno-constant-conversion -Wno-unused-but-set-variable -Wno-gnu-folding-constant -fdebug-compilation-dir=/usr/src/sys/arch/amd64/compile/GENERIC.MP/obj -ferror-limit 19 -fwrapv -D_RET_PROTECTOR -ret-protector -fcf-protection=branch -fgnuc-version=4.2.1 -vectorize-loops -vectorize-slp -fno-builtin-malloc -fno-builtin-calloc -fno-builtin-realloc -fno-builtin-valloc -fno-builtin-free -fno-builtin-strdup -fno-builtin-strndup -analyzer-output=html -faddrsig -o /home/ben/Projects/scan/2024-01-11-110808-61670-1 -x c /usr/src/sys/dev/pci/drm/i915/display/intel_bw.c
1// SPDX-License-Identifier: MIT
2/*
3 * Copyright © 2019 Intel Corporation
4 */
5
6#include <drm/drm_atomic_state_helper.h>
7
8#include "i915_drv.h"
9#include "i915_reg.h"
10#include "i915_utils.h"
11#include "intel_atomic.h"
12#include "intel_bw.h"
13#include "intel_cdclk.h"
14#include "intel_display_core.h"
15#include "intel_display_types.h"
16#include "skl_watermark.h"
17#include "intel_mchbar_regs.h"
18#include "intel_pcode.h"
19
20/* Parameters for Qclk Geyserville (QGV) */
21struct intel_qgv_point {
22 u16 dclk, t_rp, t_rdpre, t_rc, t_ras, t_rcd;
23};
24
25struct intel_psf_gv_point {
26 u8 clk; /* clock in multiples of 16.6666 MHz */
27};
28
29struct intel_qgv_info {
30 struct intel_qgv_point points[I915_NUM_QGV_POINTS8];
31 struct intel_psf_gv_point psf_points[I915_NUM_PSF_GV_POINTS3];
32 u8 num_points;
33 u8 num_psf_points;
34 u8 t_bl;
35 u8 max_numchannels;
36 u8 channel_width;
37 u8 deinterleave;
38};
39
40static int dg1_mchbar_read_qgv_point_info(struct drm_i915_privateinteldrm_softc *dev_priv,
41 struct intel_qgv_point *sp,
42 int point)
43{
44 u32 dclk_ratio, dclk_reference;
45 u32 val;
46
47 val = intel_uncore_read(&dev_priv->uncore, SA_PERF_STATUS_0_0_0_MCHBAR_PC((const i915_reg_t){ .reg = (0x140000 + 0x5918) }));
48 dclk_ratio = REG_FIELD_GET(DG1_QCLK_RATIO_MASK, val)((u32)((typeof(((u32)((((~0UL) >> (64 - (9) - 1)) &
((~0UL) << (2))) + 0))))(((val) & (((u32)((((~0UL)
>> (64 - (9) - 1)) & ((~0UL) << (2))) + 0)))
) >> (__builtin_ffsll(((u32)((((~0UL) >> (64 - (9
) - 1)) & ((~0UL) << (2))) + 0))) - 1))));
49 if (val & DG1_QCLK_REFERENCE((u32)((1UL << (10)) + 0)))
50 dclk_reference = 6; /* 6 * 16.666 MHz = 100 MHz */
51 else
52 dclk_reference = 8; /* 8 * 16.666 MHz = 133 MHz */
53 sp->dclk = DIV_ROUND_UP((16667 * dclk_ratio * dclk_reference) + 500, 1000)((((16667 * dclk_ratio * dclk_reference) + 500) + ((1000) - 1
)) / (1000));
54
55 val = intel_uncore_read(&dev_priv->uncore, SKL_MC_BIOS_DATA_0_0_0_MCHBAR_PCU((const i915_reg_t){ .reg = (0x140000 + 0x5e04) }));
56 if (val & DG1_GEAR_TYPE((u32)((1UL << (16)) + 0)))
57 sp->dclk *= 2;
58
59 if (sp->dclk == 0)
60 return -EINVAL22;
61
62 val = intel_uncore_read(&dev_priv->uncore, MCHBAR_CH0_CR_TC_PRE_0_0_0_MCHBAR((const i915_reg_t){ .reg = (0x140000 + 0x4000) }));
63 sp->t_rp = REG_FIELD_GET(DG1_DRAM_T_RP_MASK, val)((u32)((typeof(((u32)((((~0UL) >> (64 - (6) - 1)) &
((~0UL) << (0))) + 0))))(((val) & (((u32)((((~0UL)
>> (64 - (6) - 1)) & ((~0UL) << (0))) + 0)))
) >> (__builtin_ffsll(((u32)((((~0UL) >> (64 - (6
) - 1)) & ((~0UL) << (0))) + 0))) - 1))));
64 sp->t_rdpre = REG_FIELD_GET(DG1_DRAM_T_RDPRE_MASK, val)((u32)((typeof(((u32)((((~0UL) >> (64 - (16) - 1)) &
((~0UL) << (11))) + 0))))(((val) & (((u32)((((~0UL
) >> (64 - (16) - 1)) & ((~0UL) << (11))) + 0
)))) >> (__builtin_ffsll(((u32)((((~0UL) >> (64 -
(16) - 1)) & ((~0UL) << (11))) + 0))) - 1))));
65
66 val = intel_uncore_read(&dev_priv->uncore, MCHBAR_CH0_CR_TC_PRE_0_0_0_MCHBAR_HIGH((const i915_reg_t){ .reg = (0x140000 + 0x4004) }));
67 sp->t_rcd = REG_FIELD_GET(DG1_DRAM_T_RCD_MASK, val)((u32)((typeof(((u32)((((~0UL) >> (64 - (15) - 1)) &
((~0UL) << (9))) + 0))))(((val) & (((u32)((((~0UL)
>> (64 - (15) - 1)) & ((~0UL) << (9))) + 0))
)) >> (__builtin_ffsll(((u32)((((~0UL) >> (64 - (
15) - 1)) & ((~0UL) << (9))) + 0))) - 1))));
68 sp->t_ras = REG_FIELD_GET(DG1_DRAM_T_RAS_MASK, val)((u32)((typeof(((u32)((((~0UL) >> (64 - (8) - 1)) &
((~0UL) << (1))) + 0))))(((val) & (((u32)((((~0UL)
>> (64 - (8) - 1)) & ((~0UL) << (1))) + 0)))
) >> (__builtin_ffsll(((u32)((((~0UL) >> (64 - (8
) - 1)) & ((~0UL) << (1))) + 0))) - 1))));
69
70 sp->t_rc = sp->t_rp + sp->t_ras;
71
72 return 0;
73}
74
75static int icl_pcode_read_qgv_point_info(struct drm_i915_privateinteldrm_softc *dev_priv,
76 struct intel_qgv_point *sp,
77 int point)
78{
79 u32 val = 0, val2 = 0;
80 u16 dclk;
81 int ret;
82
83 ret = snb_pcode_read(&dev_priv->uncore, ICL_PCODE_MEM_SUBSYSYSTEM_INFO0xd |
84 ICL_PCODE_MEM_SS_READ_QGV_POINT_INFO(point)(((point) << 16) | (0x1 << 8)),
85 &val, &val2);
86 if (ret)
87 return ret;
88
89 dclk = val & 0xffff;
90 sp->dclk = DIV_ROUND_UP((16667 * dclk) + (DISPLAY_VER(dev_priv) > 11 ? 500 : 0), 1000)((((16667 * dclk) + (((&(dev_priv)->__runtime)->display
.ip.ver) > 11 ? 500 : 0)) + ((1000) - 1)) / (1000));
91 sp->t_rp = (val & 0xff0000) >> 16;
92 sp->t_rcd = (val & 0xff000000) >> 24;
93
94 sp->t_rdpre = val2 & 0xff;
95 sp->t_ras = (val2 & 0xff00) >> 8;
96
97 sp->t_rc = sp->t_rp + sp->t_ras;
98
99 return 0;
100}
101
102static int adls_pcode_read_psf_gv_point_info(struct drm_i915_privateinteldrm_softc *dev_priv,
103 struct intel_psf_gv_point *points)
104{
105 u32 val = 0;
106 int ret;
107 int i;
108
109 ret = snb_pcode_read(&dev_priv->uncore, ICL_PCODE_MEM_SUBSYSYSTEM_INFO0xd |
110 ADL_PCODE_MEM_SS_READ_PSF_GV_INFO((0) | (0x2 << 8)), &val, NULL((void *)0));
111 if (ret)
112 return ret;
113
114 for (i = 0; i < I915_NUM_PSF_GV_POINTS3; i++) {
115 points[i].clk = val & 0xff;
116 val >>= 8;
117 }
118
119 return 0;
120}
121
122int icl_pcode_restrict_qgv_points(struct drm_i915_privateinteldrm_softc *dev_priv,
123 u32 points_mask)
124{
125 int ret;
126
127 /* bspec says to keep retrying for at least 1 ms */
128 ret = skl_pcode_request(&dev_priv->uncore, ICL_PCODE_SAGV_DE_MEM_SS_CONFIG0xe,
129 points_mask,
130 ICL_PCODE_REP_QGV_MASK((u32)((((~0UL) >> (64 - (1) - 1)) & ((~0UL) <<
(0))) + 0)) | ADLS_PCODE_REP_PSF_MASK((u32)((((~0UL) >> (64 - (3) - 1)) & ((~0UL) <<
(2))) + 0)),
131 ICL_PCODE_REP_QGV_SAFE((u32)((((typeof(((u32)((((~0UL) >> (64 - (1) - 1)) &
((~0UL) << (0))) + 0))))(0) << (__builtin_ffsll(
((u32)((((~0UL) >> (64 - (1) - 1)) & ((~0UL) <<
(0))) + 0))) - 1)) & (((u32)((((~0UL) >> (64 - (1)
- 1)) & ((~0UL) << (0))) + 0)))) + 0 + 0 + 0 + 0)) | ADLS_PCODE_REP_PSF_SAFE((u32)((((typeof(((u32)((((~0UL) >> (64 - (3) - 1)) &
((~0UL) << (2))) + 0))))(0) << (__builtin_ffsll(
((u32)((((~0UL) >> (64 - (3) - 1)) & ((~0UL) <<
(2))) + 0))) - 1)) & (((u32)((((~0UL) >> (64 - (3)
- 1)) & ((~0UL) << (2))) + 0)))) + 0 + 0 + 0 + 0)),
132 1);
133
134 if (ret < 0) {
135 drm_err(&dev_priv->drm, "Failed to disable qgv points (%d) points: 0x%x\n", ret, points_mask)printf("drm:pid%d:%s *ERROR* " "[drm] " "*ERROR* " "Failed to disable qgv points (%d) points: 0x%x\n"
, ({struct cpu_info *__ci; asm volatile("movq %%gs:%P1,%0" : "=r"
(__ci) :"n" (__builtin_offsetof(struct cpu_info, ci_self)));
__ci;})->ci_curproc->p_p->ps_pid, __func__ , ret, points_mask
);
136 return ret;
137 }
138
139 return 0;
140}
141
142static int mtl_read_qgv_point_info(struct drm_i915_privateinteldrm_softc *dev_priv,
143 struct intel_qgv_point *sp, int point)
144{
145 u32 val, val2;
146 u16 dclk;
147
148 val = intel_uncore_read(&dev_priv->uncore,
149 MTL_MEM_SS_INFO_QGV_POINT_LOW(point)((const i915_reg_t){ .reg = (0x45710 + (point) * 2) }));
150 val2 = intel_uncore_read(&dev_priv->uncore,
151 MTL_MEM_SS_INFO_QGV_POINT_HIGH(point)((const i915_reg_t){ .reg = (0x45714 + (point) * 2) }));
152 dclk = REG_FIELD_GET(MTL_DCLK_MASK, val)((u32)((typeof(((u32)((((~0UL) >> (64 - (15) - 1)) &
((~0UL) << (0))) + 0))))(((val) & (((u32)((((~0UL)
>> (64 - (15) - 1)) & ((~0UL) << (0))) + 0))
)) >> (__builtin_ffsll(((u32)((((~0UL) >> (64 - (
15) - 1)) & ((~0UL) << (0))) + 0))) - 1))));
153 sp->dclk = DIV_ROUND_UP((16667 * dclk), 1000)((((16667 * dclk)) + ((1000) - 1)) / (1000));
154 sp->t_rp = REG_FIELD_GET(MTL_TRP_MASK, val)((u32)((typeof(((u32)((((~0UL) >> (64 - (23) - 1)) &
((~0UL) << (16))) + 0))))(((val) & (((u32)((((~0UL
) >> (64 - (23) - 1)) & ((~0UL) << (16))) + 0
)))) >> (__builtin_ffsll(((u32)((((~0UL) >> (64 -
(23) - 1)) & ((~0UL) << (16))) + 0))) - 1))));
155 sp->t_rcd = REG_FIELD_GET(MTL_TRCD_MASK, val)((u32)((typeof(((u32)((((~0UL) >> (64 - (31) - 1)) &
((~0UL) << (24))) + 0))))(((val) & (((u32)((((~0UL
) >> (64 - (31) - 1)) & ((~0UL) << (24))) + 0
)))) >> (__builtin_ffsll(((u32)((((~0UL) >> (64 -
(31) - 1)) & ((~0UL) << (24))) + 0))) - 1))));
156
157 sp->t_rdpre = REG_FIELD_GET(MTL_TRDPRE_MASK, val2)((u32)((typeof(((u32)((((~0UL) >> (64 - (7) - 1)) &
((~0UL) << (0))) + 0))))(((val2) & (((u32)((((~0UL
) >> (64 - (7) - 1)) & ((~0UL) << (0))) + 0))
)) >> (__builtin_ffsll(((u32)((((~0UL) >> (64 - (
7) - 1)) & ((~0UL) << (0))) + 0))) - 1))));
158 sp->t_ras = REG_FIELD_GET(MTL_TRAS_MASK, val2)((u32)((typeof(((u32)((((~0UL) >> (64 - (16) - 1)) &
((~0UL) << (8))) + 0))))(((val2) & (((u32)((((~0UL
) >> (64 - (16) - 1)) & ((~0UL) << (8))) + 0)
))) >> (__builtin_ffsll(((u32)((((~0UL) >> (64 - (
16) - 1)) & ((~0UL) << (8))) + 0))) - 1))));
159
160 sp->t_rc = sp->t_rp + sp->t_ras;
161
162 return 0;
163}
164
165static int
166intel_read_qgv_point_info(struct drm_i915_privateinteldrm_softc *dev_priv,
167 struct intel_qgv_point *sp,
168 int point)
169{
170 if (DISPLAY_VER(dev_priv)((&(dev_priv)->__runtime)->display.ip.ver) >= 14)
171 return mtl_read_qgv_point_info(dev_priv, sp, point);
172 else if (IS_DG1(dev_priv)IS_PLATFORM(dev_priv, INTEL_DG1))
173 return dg1_mchbar_read_qgv_point_info(dev_priv, sp, point);
174 else
175 return icl_pcode_read_qgv_point_info(dev_priv, sp, point);
176}
177
178static int icl_get_qgv_points(struct drm_i915_privateinteldrm_softc *dev_priv,
179 struct intel_qgv_info *qi,
180 bool_Bool is_y_tile)
181{
182 const struct dram_info *dram_info = &dev_priv->dram_info;
183 int i, ret;
184
185 qi->num_points = dram_info->num_qgv_points;
186 qi->num_psf_points = dram_info->num_psf_gv_points;
187
188 if (DISPLAY_VER(dev_priv)((&(dev_priv)->__runtime)->display.ip.ver) >= 14) {
13
←
Taking false branch
→
189 switch (dram_info->type) {
190 case INTEL_DRAM_DDR4:
191 qi->t_bl = 4;
192 qi->max_numchannels = 2;
193 qi->channel_width = 64;
194 qi->deinterleave = 2;
195 break;
196 case INTEL_DRAM_DDR5:
197 qi->t_bl = 8;
198 qi->max_numchannels = 4;
199 qi->channel_width = 32;
200 qi->deinterleave = 2;
201 break;
202 case INTEL_DRAM_LPDDR4:
203 case INTEL_DRAM_LPDDR5:
204 qi->t_bl = 16;
205 qi->max_numchannels = 8;
206 qi->channel_width = 16;
207 qi->deinterleave = 4;
208 break;
209 default:
210 MISSING_CASE(dram_info->type)({ int __ret = !!(1); if (__ret) printf("Missing case (%s == %ld)\n"
, "dram_info->type", (long)(dram_info->type)); __builtin_expect
(!!(__ret), 0); });
211 return -EINVAL22;
212 }
213 } else if (DISPLAY_VER(dev_priv)((&(dev_priv)->__runtime)->display.ip.ver) >= 12) {
14
←
Assuming field 'ver' is < 12
→
15
←
Taking false branch
→
214 switch (dram_info->type) {
215 case INTEL_DRAM_DDR4:
216 qi->t_bl = is_y_tile ? 8 : 4;
217 qi->max_numchannels = 2;
218 qi->channel_width = 64;
219 qi->deinterleave = is_y_tile ? 1 : 2;
220 break;
221 case INTEL_DRAM_DDR5:
222 qi->t_bl = is_y_tile ? 16 : 8;
223 qi->max_numchannels = 4;
224 qi->channel_width = 32;
225 qi->deinterleave = is_y_tile ? 1 : 2;
226 break;
227 case INTEL_DRAM_LPDDR4:
228 if (IS_ROCKETLAKE(dev_priv)IS_PLATFORM(dev_priv, INTEL_ROCKETLAKE)) {
229 qi->t_bl = 8;
230 qi->max_numchannels = 4;
231 qi->channel_width = 32;
232 qi->deinterleave = 2;
233 break;
234 }
235 fallthroughdo {} while (0);
236 case INTEL_DRAM_LPDDR5:
237 qi->t_bl = 16;
238 qi->max_numchannels = 8;
239 qi->channel_width = 16;
240 qi->deinterleave = is_y_tile ? 2 : 4;
241 break;
242 default:
243 qi->t_bl = 16;
244 qi->max_numchannels = 1;
245 break;
246 }
247 } else if (DISPLAY_VER(dev_priv)((&(dev_priv)->__runtime)->display.ip.ver) == 11) {
16
←
Assuming field 'ver' is not equal to 11
→
17
←
Taking false branch
→
248 qi->t_bl = dev_priv->dram_info.type == INTEL_DRAM_DDR4 ? 4 : 8;
249 qi->max_numchannels = 1;
250 }
251
252 if (drm_WARN_ON(&dev_priv->drm,({ int __ret = !!((qi->num_points > (sizeof((qi->points
)) / sizeof((qi->points)[0])))); if (__ret) printf("%s %s: "
"%s", dev_driver_string(((&dev_priv->drm))->dev), ""
, "drm_WARN_ON(" "qi->num_points > (sizeof((qi->points)) / sizeof((qi->points)[0]))"
")"); __builtin_expect(!!(__ret), 0); })
18
←
Assuming the condition is false
→
19
←
Taking false branch
→
20
←
Taking false branch
→
253 qi->num_points > ARRAY_SIZE(qi->points))({ int __ret = !!((qi->num_points > (sizeof((qi->points
)) / sizeof((qi->points)[0])))); if (__ret) printf("%s %s: "
"%s", dev_driver_string(((&dev_priv->drm))->dev), ""
, "drm_WARN_ON(" "qi->num_points > (sizeof((qi->points)) / sizeof((qi->points)[0]))"
")"); __builtin_expect(!!(__ret), 0); }))
254 qi->num_points = ARRAY_SIZE(qi->points)(sizeof((qi->points)) / sizeof((qi->points)[0]));
255
256 for (i = 0; i < qi->num_points; i++) {
21
←
Assuming 'i' is >= field 'num_points'
→
22
←
Loop condition is false. Execution continues on line 269
→
257 struct intel_qgv_point *sp = &qi->points[i];
258
259 ret = intel_read_qgv_point_info(dev_priv, sp, i);
260 if (ret)
261 return ret;
262
263 drm_dbg_kms(&dev_priv->drm,__drm_dev_dbg(((void *)0), (&dev_priv->drm) ? (&dev_priv
->drm)->dev : ((void *)0), DRM_UT_KMS, "QGV %d: DCLK=%d tRP=%d tRDPRE=%d tRAS=%d tRCD=%d tRC=%d\n"
, i, sp->dclk, sp->t_rp, sp->t_rdpre, sp->t_ras, sp
->t_rcd, sp->t_rc)
264 "QGV %d: DCLK=%d tRP=%d tRDPRE=%d tRAS=%d tRCD=%d tRC=%d\n",__drm_dev_dbg(((void *)0), (&dev_priv->drm) ? (&dev_priv
->drm)->dev : ((void *)0), DRM_UT_KMS, "QGV %d: DCLK=%d tRP=%d tRDPRE=%d tRAS=%d tRCD=%d tRC=%d\n"
, i, sp->dclk, sp->t_rp, sp->t_rdpre, sp->t_ras, sp
->t_rcd, sp->t_rc)
265 i, sp->dclk, sp->t_rp, sp->t_rdpre, sp->t_ras,__drm_dev_dbg(((void *)0), (&dev_priv->drm) ? (&dev_priv
->drm)->dev : ((void *)0), DRM_UT_KMS, "QGV %d: DCLK=%d tRP=%d tRDPRE=%d tRAS=%d tRCD=%d tRC=%d\n"
, i, sp->dclk, sp->t_rp, sp->t_rdpre, sp->t_ras, sp
->t_rcd, sp->t_rc)
266 sp->t_rcd, sp->t_rc)__drm_dev_dbg(((void *)0), (&dev_priv->drm) ? (&dev_priv
->drm)->dev : ((void *)0), DRM_UT_KMS, "QGV %d: DCLK=%d tRP=%d tRDPRE=%d tRAS=%d tRCD=%d tRC=%d\n"
, i, sp->dclk, sp->t_rp, sp->t_rdpre, sp->t_ras, sp
->t_rcd, sp->t_rc);
267 }
268
269 if (qi->num_psf_points > 0) {
23
←
Assuming field 'num_psf_points' is > 0
→
24
←
Taking true branch
→
270 ret = adls_pcode_read_psf_gv_point_info(dev_priv, qi->psf_points);
271 if (ret
24.1
'ret' is not equal to 0
) {
25
←
Taking true branch
→
272 drm_err(&dev_priv->drm, "Failed to read PSF point data; PSF points will not be considered in bandwidth calculations.\n")printf("drm:pid%d:%s *ERROR* " "[drm] " "*ERROR* " "Failed to read PSF point data; PSF points will not be considered in bandwidth calculations.\n"
, ({struct cpu_info *__ci; asm volatile("movq %%gs:%P1,%0" : "=r"
(__ci) :"n" (__builtin_offsetof(struct cpu_info, ci_self)));
__ci;})->ci_curproc->p_p->ps_pid, __func__);
273 qi->num_psf_points = 0;
274 }
275
276 for (i = 0; i < qi->num_psf_points; i++)
26
←
Loop condition is false. Execution continues on line 282
→
277 drm_dbg_kms(&dev_priv->drm,__drm_dev_dbg(((void *)0), (&dev_priv->drm) ? (&dev_priv
->drm)->dev : ((void *)0), DRM_UT_KMS, "PSF GV %d: CLK=%d \n"
, i, qi->psf_points[i].clk)
278 "PSF GV %d: CLK=%d \n",__drm_dev_dbg(((void *)0), (&dev_priv->drm) ? (&dev_priv
->drm)->dev : ((void *)0), DRM_UT_KMS, "PSF GV %d: CLK=%d \n"
, i, qi->psf_points[i].clk)
279 i, qi->psf_points[i].clk)__drm_dev_dbg(((void *)0), (&dev_priv->drm) ? (&dev_priv
->drm)->dev : ((void *)0), DRM_UT_KMS, "PSF GV %d: CLK=%d \n"
, i, qi->psf_points[i].clk);
280 }
281
282 return 0;
27
←
Returning zero, which participates in a condition later
→
283}
284
285static int adl_calc_psf_bw(int clk)
286{
287 /*
288 * clk is multiples of 16.666MHz (100/6)
289 * According to BSpec PSF GV bandwidth is
290 * calculated as BW = 64 * clk * 16.666Mhz
291 */
292 return DIV_ROUND_CLOSEST(64 * clk * 100, 6)(((64 * clk * 100) + ((6) / 2)) / (6));
293}
294
295static int icl_sagv_max_dclk(const struct intel_qgv_info *qi)
296{
297 u16 dclk = 0;
298 int i;
299
300 for (i = 0; i < qi->num_points; i++)
301 dclk = max(dclk, qi->points[i].dclk)(((dclk)>(qi->points[i].dclk))?(dclk):(qi->points[i]
.dclk));
302
303 return dclk;
304}
305
306struct intel_sa_info {
307 u16 displayrtids;
308 u8 deburst, deprogbwlimit, derating;
309};
310
311static const struct intel_sa_info icl_sa_info = {
312 .deburst = 8,
313 .deprogbwlimit = 25, /* GB/s */
314 .displayrtids = 128,
315 .derating = 10,
316};
317
318static const struct intel_sa_info tgl_sa_info = {
319 .deburst = 16,
320 .deprogbwlimit = 34, /* GB/s */
321 .displayrtids = 256,
322 .derating = 10,
323};
324
325static const struct intel_sa_info rkl_sa_info = {
326 .deburst = 8,
327 .deprogbwlimit = 20, /* GB/s */
328 .displayrtids = 128,
329 .derating = 10,
330};
331
332static const struct intel_sa_info adls_sa_info = {
333 .deburst = 16,
334 .deprogbwlimit = 38, /* GB/s */
335 .displayrtids = 256,
336 .derating = 10,
337};
338
339static const struct intel_sa_info adlp_sa_info = {
340 .deburst = 16,
341 .deprogbwlimit = 38, /* GB/s */
342 .displayrtids = 256,
343 .derating = 20,
344};
345
346static const struct intel_sa_info mtl_sa_info = {
347 .deburst = 32,
348 .deprogbwlimit = 38, /* GB/s */
349 .displayrtids = 256,
350 .derating = 20,
351};
352
353static int icl_get_bw_info(struct drm_i915_privateinteldrm_softc *dev_priv, const struct intel_sa_info *sa)
354{
355 struct intel_qgv_info qi = {};
356 bool_Bool is_y_tile = true1; /* assume y tile may be used */
357 int num_channels = max_t(u8, 1, dev_priv->dram_info.num_channels)({ u8 __max_a = (1); u8 __max_b = (dev_priv->dram_info.num_channels
); __max_a > __max_b ? __max_a : __max_b; });
358 int ipqdepth, ipqdepthpch = 16;
359 int dclk_max;
360 int maxdebw;
361 int num_groups = ARRAY_SIZE(dev_priv->display.bw.max)(sizeof((dev_priv->display.bw.max)) / sizeof((dev_priv->
display.bw.max)[0]));
362 int i, ret;
363
364 ret = icl_get_qgv_points(dev_priv, &qi, is_y_tile);
365 if (ret) {
366 drm_dbg_kms(&dev_priv->drm,__drm_dev_dbg(((void *)0), (&dev_priv->drm) ? (&dev_priv
->drm)->dev : ((void *)0), DRM_UT_KMS, "Failed to get memory subsystem information, ignoring bandwidth limits"
)
367 "Failed to get memory subsystem information, ignoring bandwidth limits")__drm_dev_dbg(((void *)0), (&dev_priv->drm) ? (&dev_priv
->drm)->dev : ((void *)0), DRM_UT_KMS, "Failed to get memory subsystem information, ignoring bandwidth limits"
);
368 return ret;
369 }
370
371 dclk_max = icl_sagv_max_dclk(&qi);
372 maxdebw = min(sa->deprogbwlimit * 1000, dclk_max * 16 * 6 / 10)(((sa->deprogbwlimit * 1000)<(dclk_max * 16 * 6 / 10))?
(sa->deprogbwlimit * 1000):(dclk_max * 16 * 6 / 10));
373 ipqdepth = min(ipqdepthpch, sa->displayrtids / num_channels)(((ipqdepthpch)<(sa->displayrtids / num_channels))?(ipqdepthpch
):(sa->displayrtids / num_channels));
374 qi.deinterleave = DIV_ROUND_UP(num_channels, is_y_tile ? 4 : 2)(((num_channels) + ((is_y_tile ? 4 : 2) - 1)) / (is_y_tile ? 4
: 2));
375
376 for (i = 0; i < num_groups; i++) {
377 struct intel_bw_info *bi = &dev_priv->display.bw.max[i];
378 int clpchgroup;
379 int j;
380
381 clpchgroup = (sa->deburst * qi.deinterleave / num_channels) << i;
382 bi->num_planes = (ipqdepth - clpchgroup) / clpchgroup + 1;
383
384 bi->num_qgv_points = qi.num_points;
385 bi->num_psf_gv_points = qi.num_psf_points;
386
387 for (j = 0; j < qi.num_points; j++) {
388 const struct intel_qgv_point *sp = &qi.points[j];
389 int ct, bw;
390
391 /*
392 * Max row cycle time
393 *
394 * FIXME what is the logic behind the
395 * assumed burst length?
396 */
397 ct = max_t(int, sp->t_rc, sp->t_rp + sp->t_rcd +({ int __max_a = (sp->t_rc); int __max_b = (sp->t_rp + sp
->t_rcd + (clpchgroup - 1) * qi.t_bl + sp->t_rdpre); __max_a
> __max_b ? __max_a : __max_b; })
398 (clpchgroup - 1) * qi.t_bl + sp->t_rdpre)({ int __max_a = (sp->t_rc); int __max_b = (sp->t_rp + sp
->t_rcd + (clpchgroup - 1) * qi.t_bl + sp->t_rdpre); __max_a
> __max_b ? __max_a : __max_b; });
399 bw = DIV_ROUND_UP(sp->dclk * clpchgroup * 32 * num_channels, ct)(((sp->dclk * clpchgroup * 32 * num_channels) + ((ct) - 1)
) / (ct));
400
401 bi->deratedbw[j] = min(maxdebw,(((maxdebw)<(bw * (100 - sa->derating) / 100))?(maxdebw
):(bw * (100 - sa->derating) / 100))
402 bw * (100 - sa->derating) / 100)(((maxdebw)<(bw * (100 - sa->derating) / 100))?(maxdebw
):(bw * (100 - sa->derating) / 100));
403
404 drm_dbg_kms(&dev_priv->drm,__drm_dev_dbg(((void *)0), (&dev_priv->drm) ? (&dev_priv
->drm)->dev : ((void *)0), DRM_UT_KMS, "BW%d / QGV %d: num_planes=%d deratedbw=%u\n"
, i, j, bi->num_planes, bi->deratedbw[j])
405 "BW%d / QGV %d: num_planes=%d deratedbw=%u\n",__drm_dev_dbg(((void *)0), (&dev_priv->drm) ? (&dev_priv
->drm)->dev : ((void *)0), DRM_UT_KMS, "BW%d / QGV %d: num_planes=%d deratedbw=%u\n"
, i, j, bi->num_planes, bi->deratedbw[j])
406 i, j, bi->num_planes, bi->deratedbw[j])__drm_dev_dbg(((void *)0), (&dev_priv->drm) ? (&dev_priv
->drm)->dev : ((void *)0), DRM_UT_KMS, "BW%d / QGV %d: num_planes=%d deratedbw=%u\n"
, i, j, bi->num_planes, bi->deratedbw[j]);
407 }
408 }
409 /*
410 * In case if SAGV is disabled in BIOS, we always get 1
411 * SAGV point, but we can't send PCode commands to restrict it
412 * as it will fail and pointless anyway.
413 */
414 if (qi.num_points == 1)
415 dev_priv->display.sagv.status = I915_SAGV_NOT_CONTROLLED;
416 else
417 dev_priv->display.sagv.status = I915_SAGV_ENABLED;
418
419 return 0;
420}
421
422static int tgl_get_bw_info(struct drm_i915_privateinteldrm_softc *dev_priv, const struct intel_sa_info *sa)
423{
424 struct intel_qgv_info qi = {};
425 const struct dram_info *dram_info = &dev_priv->dram_info;
426 bool_Bool is_y_tile = true1; /* assume y tile may be used */
427 int num_channels = max_t(u8, 1, dev_priv->dram_info.num_channels)({ u8 __max_a = (1); u8 __max_b = (dev_priv->dram_info.num_channels
); __max_a > __max_b ? __max_a : __max_b; });
10
←
Assuming '__max_a' is <= '__max_b'
→
11
←
'?' condition is false
→
428 int ipqdepth, ipqdepthpch = 16;
429 int dclk_max;
430 int maxdebw, peakbw;
431 int clperchgroup;
432 int num_groups = ARRAY_SIZE(dev_priv->display.bw.max)(sizeof((dev_priv->display.bw.max)) / sizeof((dev_priv->
display.bw.max)[0]));
433 int i, ret;
434
435 ret = icl_get_qgv_points(dev_priv, &qi, is_y_tile);
12
←
Calling 'icl_get_qgv_points'
→
28
←
Returning from 'icl_get_qgv_points'
→
436 if (ret
28.1
'ret' is 0
) {
437 drm_dbg_kms(&dev_priv->drm,__drm_dev_dbg(((void *)0), (&dev_priv->drm) ? (&dev_priv
->drm)->dev : ((void *)0), DRM_UT_KMS, "Failed to get memory subsystem information, ignoring bandwidth limits"
)
438 "Failed to get memory subsystem information, ignoring bandwidth limits")__drm_dev_dbg(((void *)0), (&dev_priv->drm) ? (&dev_priv
->drm)->dev : ((void *)0), DRM_UT_KMS, "Failed to get memory subsystem information, ignoring bandwidth limits"
);
439 return ret;
440 }
441
442 if (dram_info->type == INTEL_DRAM_LPDDR4 || dram_info->type == INTEL_DRAM_LPDDR5)
29
←
Assuming field 'type' is equal to INTEL_DRAM_LPDDR4
→
443 num_channels *= 2;
30
←
Value assigned to 'num_channels'
→
444
445 qi.deinterleave = qi.deinterleave ? : DIV_ROUND_UP(num_channels, is_y_tile ? 4 : 2)(((num_channels) + ((is_y_tile ? 4 : 2) - 1)) / (is_y_tile ? 4
: 2));
31
←
'?' condition is false
→
32
←
'?' condition is true
→
33
←
'?' condition is true
→
446
447 if (num_channels < qi.max_numchannels && DISPLAY_VER(dev_priv)((&(dev_priv)->__runtime)->display.ip.ver) >= 12)
34
←
Assuming 'num_channels' is >= field 'max_numchannels'
→
448 qi.deinterleave = max(DIV_ROUND_UP(qi.deinterleave, 2), 1)((((((qi.deinterleave) + ((2) - 1)) / (2)))>(1))?((((qi.deinterleave
) + ((2) - 1)) / (2))):(1));
449
450 if (DISPLAY_VER(dev_priv)((&(dev_priv)->__runtime)->display.ip.ver) > 11 && num_channels > qi.max_numchannels)
35
←
Assuming field 'ver' is > 11
→
36
←
Assuming 'num_channels' is <= field 'max_numchannels'
→
37
←
Taking false branch
→
451 drm_warn(&dev_priv->drm, "Number of channels exceeds max number of channels.")printf("drm:pid%d:%s *WARNING* " "[drm] " "Number of channels exceeds max number of channels."
, ({struct cpu_info *__ci; asm volatile("movq %%gs:%P1,%0" : "=r"
(__ci) :"n" (__builtin_offsetof(struct cpu_info, ci_self)));
__ci;})->ci_curproc->p_p->ps_pid, __func__);
452 if (qi.max_numchannels
37.1
Field 'max_numchannels' is equal to 0
 != 0)
38
←
Taking false branch
→
453 num_channels = min_t(u8, num_channels, qi.max_numchannels)({ u8 __min_a = (num_channels); u8 __min_b = (qi.max_numchannels
); __min_a < __min_b ? __min_a : __min_b; });
454
455 dclk_max = icl_sagv_max_dclk(&qi);
456
457 peakbw = num_channels * DIV_ROUND_UP(qi.channel_width, 8)(((qi.channel_width) + ((8) - 1)) / (8)) * dclk_max;
458 maxdebw = min(sa->deprogbwlimit * 1000, peakbw * 6 / 10)(((sa->deprogbwlimit * 1000)<(peakbw * 6 / 10))?(sa->
deprogbwlimit * 1000):(peakbw * 6 / 10)); /* 60% */
39
←
'?' condition is false
→
459
460 ipqdepth = min(ipqdepthpch, sa->displayrtids / num_channels)(((ipqdepthpch)<(sa->displayrtids / num_channels))?(ipqdepthpch
):(sa->displayrtids / num_channels));
40
←
Division by zero
461 /*
462 * clperchgroup = 4kpagespermempage * clperchperblock,
463 * clperchperblock = 8 / num_channels * interleave
464 */
465 clperchgroup = 4 * DIV_ROUND_UP(8, num_channels)(((8) + ((num_channels) - 1)) / (num_channels)) * qi.deinterleave;
466
467 for (i = 0; i < num_groups; i++) {
468 struct intel_bw_info *bi = &dev_priv->display.bw.max[i];
469 struct intel_bw_info *bi_next;
470 int clpchgroup;
471 int j;
472
473 clpchgroup = (sa->deburst * qi.deinterleave / num_channels) << i;
474
475 if (i < num_groups - 1) {
476 bi_next = &dev_priv->display.bw.max[i + 1];
477
478 if (clpchgroup < clperchgroup)
479 bi_next->num_planes = (ipqdepth - clpchgroup) /
480 clpchgroup + 1;
481 else
482 bi_next->num_planes = 0;
483 }
484
485 bi->num_qgv_points = qi.num_points;
486 bi->num_psf_gv_points = qi.num_psf_points;
487
488 for (j = 0; j < qi.num_points; j++) {
489 const struct intel_qgv_point *sp = &qi.points[j];
490 int ct, bw;
491
492 /*
493 * Max row cycle time
494 *
495 * FIXME what is the logic behind the
496 * assumed burst length?
497 */
498 ct = max_t(int, sp->t_rc, sp->t_rp + sp->t_rcd +({ int __max_a = (sp->t_rc); int __max_b = (sp->t_rp + sp
->t_rcd + (clpchgroup - 1) * qi.t_bl + sp->t_rdpre); __max_a
> __max_b ? __max_a : __max_b; })
499 (clpchgroup - 1) * qi.t_bl + sp->t_rdpre)({ int __max_a = (sp->t_rc); int __max_b = (sp->t_rp + sp
->t_rcd + (clpchgroup - 1) * qi.t_bl + sp->t_rdpre); __max_a
> __max_b ? __max_a : __max_b; });
500 bw = DIV_ROUND_UP(sp->dclk * clpchgroup * 32 * num_channels, ct)(((sp->dclk * clpchgroup * 32 * num_channels) + ((ct) - 1)
) / (ct));
501
502 bi->deratedbw[j] = min(maxdebw,(((maxdebw)<(bw * (100 - sa->derating) / 100))?(maxdebw
):(bw * (100 - sa->derating) / 100))
503 bw * (100 - sa->derating) / 100)(((maxdebw)<(bw * (100 - sa->derating) / 100))?(maxdebw
):(bw * (100 - sa->derating) / 100));
504
505 drm_dbg_kms(&dev_priv->drm,__drm_dev_dbg(((void *)0), (&dev_priv->drm) ? (&dev_priv
->drm)->dev : ((void *)0), DRM_UT_KMS, "BW%d / QGV %d: num_planes=%d deratedbw=%u\n"
, i, j, bi->num_planes, bi->deratedbw[j])
506 "BW%d / QGV %d: num_planes=%d deratedbw=%u\n",__drm_dev_dbg(((void *)0), (&dev_priv->drm) ? (&dev_priv
->drm)->dev : ((void *)0), DRM_UT_KMS, "BW%d / QGV %d: num_planes=%d deratedbw=%u\n"
, i, j, bi->num_planes, bi->deratedbw[j])
507 i, j, bi->num_planes, bi->deratedbw[j])__drm_dev_dbg(((void *)0), (&dev_priv->drm) ? (&dev_priv
->drm)->dev : ((void *)0), DRM_UT_KMS, "BW%d / QGV %d: num_planes=%d deratedbw=%u\n"
, i, j, bi->num_planes, bi->deratedbw[j]);
508 }
509
510 for (j = 0; j < qi.num_psf_points; j++) {
511 const struct intel_psf_gv_point *sp = &qi.psf_points[j];
512
513 bi->psf_bw[j] = adl_calc_psf_bw(sp->clk);
514
515 drm_dbg_kms(&dev_priv->drm,__drm_dev_dbg(((void *)0), (&dev_priv->drm) ? (&dev_priv
->drm)->dev : ((void *)0), DRM_UT_KMS, "BW%d / PSF GV %d: num_planes=%d bw=%u\n"
, i, j, bi->num_planes, bi->psf_bw[j])
516 "BW%d / PSF GV %d: num_planes=%d bw=%u\n",__drm_dev_dbg(((void *)0), (&dev_priv->drm) ? (&dev_priv
->drm)->dev : ((void *)0), DRM_UT_KMS, "BW%d / PSF GV %d: num_planes=%d bw=%u\n"
, i, j, bi->num_planes, bi->psf_bw[j])
517 i, j, bi->num_planes, bi->psf_bw[j])__drm_dev_dbg(((void *)0), (&dev_priv->drm) ? (&dev_priv
->drm)->dev : ((void *)0), DRM_UT_KMS, "BW%d / PSF GV %d: num_planes=%d bw=%u\n"
, i, j, bi->num_planes, bi->psf_bw[j]);
518 }
519 }
520
521 /*
522 * In case if SAGV is disabled in BIOS, we always get 1
523 * SAGV point, but we can't send PCode commands to restrict it
524 * as it will fail and pointless anyway.
525 */
526 if (qi.num_points == 1)
527 dev_priv->display.sagv.status = I915_SAGV_NOT_CONTROLLED;
528 else
529 dev_priv->display.sagv.status = I915_SAGV_ENABLED;
530
531 return 0;
532}
533
534static void dg2_get_bw_info(struct drm_i915_privateinteldrm_softc *i915)
535{
536 unsigned int deratedbw = IS_DG2_G11(i915)IS_SUBPLATFORM(i915, INTEL_DG2, 1) ? 38000 : 50000;
537 int num_groups = ARRAY_SIZE(i915->display.bw.max)(sizeof((i915->display.bw.max)) / sizeof((i915->display
.bw.max)[0]));
538 int i;
539
540 /*
541 * DG2 doesn't have SAGV or QGV points, just a constant max bandwidth
542 * that doesn't depend on the number of planes enabled. So fill all the
543 * plane group with constant bw information for uniformity with other
544 * platforms. DG2-G10 platforms have a constant 50 GB/s bandwidth,
545 * whereas DG2-G11 platforms have 38 GB/s.
546 */
547 for (i = 0; i < num_groups; i++) {
548 struct intel_bw_info *bi = &i915->display.bw.max[i];
549
550 bi->num_planes = 1;
551 /* Need only one dummy QGV point per group */
552 bi->num_qgv_points = 1;
553 bi->deratedbw[0] = deratedbw;
554 }
555
556 i915->display.sagv.status = I915_SAGV_NOT_CONTROLLED;
557}
558
559static unsigned int icl_max_bw(struct drm_i915_privateinteldrm_softc *dev_priv,
560 int num_planes, int qgv_point)
561{
562 int i;
563
564 /*
565 * Let's return max bw for 0 planes
566 */
567 num_planes = max(1, num_planes)(((1)>(num_planes))?(1):(num_planes));
568
569 for (i = 0; i < ARRAY_SIZE(dev_priv->display.bw.max)(sizeof((dev_priv->display.bw.max)) / sizeof((dev_priv->
display.bw.max)[0])); i++) {
570 const struct intel_bw_info *bi =
571 &dev_priv->display.bw.max[i];
572
573 /*
574 * Pcode will not expose all QGV points when
575 * SAGV is forced to off/min/med/max.
576 */
577 if (qgv_point >= bi->num_qgv_points)
578 return UINT_MAX0xffffffffU;
579
580 if (num_planes >= bi->num_planes)
581 return bi->deratedbw[qgv_point];
582 }
583
584 return 0;
585}
586
587static unsigned int tgl_max_bw(struct drm_i915_privateinteldrm_softc *dev_priv,
588 int num_planes, int qgv_point)
589{
590 int i;
591
592 /*
593 * Let's return max bw for 0 planes
594 */
595 num_planes = max(1, num_planes)(((1)>(num_planes))?(1):(num_planes));
596
597 for (i = ARRAY_SIZE(dev_priv->display.bw.max)(sizeof((dev_priv->display.bw.max)) / sizeof((dev_priv->
display.bw.max)[0])) - 1; i >= 0; i--) {
598 const struct intel_bw_info *bi =
599 &dev_priv->display.bw.max[i];
600
601 /*
602 * Pcode will not expose all QGV points when
603 * SAGV is forced to off/min/med/max.
604 */
605 if (qgv_point >= bi->num_qgv_points)
606 return UINT_MAX0xffffffffU;
607
608 if (num_planes <= bi->num_planes)
609 return bi->deratedbw[qgv_point];
610 }
611
612 return dev_priv->display.bw.max[0].deratedbw[qgv_point];
613}
614
615static unsigned int adl_psf_bw(struct drm_i915_privateinteldrm_softc *dev_priv,
616 int psf_gv_point)
617{
618 const struct intel_bw_info *bi =
619 &dev_priv->display.bw.max[0];
620
621 return bi->psf_bw[psf_gv_point];
622}
623
624void intel_bw_init_hw(struct drm_i915_privateinteldrm_softc *dev_priv)
625{
626 if (!HAS_DISPLAY(dev_priv)((&(dev_priv)->__runtime)->pipe_mask != 0))
1
Assuming field 'pipe_mask' is not equal to 0
→
2
←
Taking false branch
→
627 return;
628
629 if (DISPLAY_VER(dev_priv)((&(dev_priv)->__runtime)->display.ip.ver) >= 14)
3
←
Assuming field 'ver' is < 14
→
4
←
Taking false branch
→
630 tgl_get_bw_info(dev_priv, &mtl_sa_info);
631 else if (IS_DG2(dev_priv)IS_PLATFORM(dev_priv, INTEL_DG2))
5
←
Assuming the condition is false
→
6
←
Taking false branch
→
632 dg2_get_bw_info(dev_priv);
633 else if (IS_ALDERLAKE_P(dev_priv)IS_PLATFORM(dev_priv, INTEL_ALDERLAKE_P))
7
←
Assuming the condition is true
→
8
←
Taking true branch
→
634 tgl_get_bw_info(dev_priv, &adlp_sa_info);
9
←
Calling 'tgl_get_bw_info'
→
635 else if (IS_ALDERLAKE_S(dev_priv)IS_PLATFORM(dev_priv, INTEL_ALDERLAKE_S))
636 tgl_get_bw_info(dev_priv, &adls_sa_info);
637 else if (IS_ROCKETLAKE(dev_priv)IS_PLATFORM(dev_priv, INTEL_ROCKETLAKE))
638 tgl_get_bw_info(dev_priv, &rkl_sa_info);
639 else if (DISPLAY_VER(dev_priv)((&(dev_priv)->__runtime)->display.ip.ver) == 12)
640 tgl_get_bw_info(dev_priv, &tgl_sa_info);
641 else if (DISPLAY_VER(dev_priv)((&(dev_priv)->__runtime)->display.ip.ver) == 11)
642 icl_get_bw_info(dev_priv, &icl_sa_info);
643}
644
645static unsigned int intel_bw_crtc_num_active_planes(const struct intel_crtc_state *crtc_state)
646{
647 /*
648 * We assume cursors are small enough
649 * to not not cause bandwidth problems.
650 */
651 return hweight8(crtc_state->active_planes & ~BIT(PLANE_CURSOR)(1UL << (PLANE_CURSOR)));
652}
653
654static unsigned int intel_bw_crtc_data_rate(const struct intel_crtc_state *crtc_state)
655{
656 struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc)({ const __typeof( ((struct intel_crtc *)0)->base ) *__mptr
= (crtc_state->uapi.crtc); (struct intel_crtc *)( (char *
)__mptr - __builtin_offsetof(struct intel_crtc, base) );});
657 struct drm_i915_privateinteldrm_softc *i915 = to_i915(crtc->base.dev);
658 unsigned int data_rate = 0;
659 enum plane_id plane_id;
660
661 for_each_plane_id_on_crtc(crtc, plane_id)for ((plane_id) = PLANE_PRIMARY; (plane_id) < I915_MAX_PLANES
; (plane_id)++) if (!((crtc)->plane_ids_mask & (1UL <<
(plane_id)))) {} else {
662 /*
663 * We assume cursors are small enough
664 * to not not cause bandwidth problems.
665 */
666 if (plane_id == PLANE_CURSOR)
667 continue;
668
669 data_rate += crtc_state->data_rate[plane_id];
670
671 if (DISPLAY_VER(i915)((&(i915)->__runtime)->display.ip.ver) < 11)
672 data_rate += crtc_state->data_rate_y[plane_id];
673 }
674
675 return data_rate;
676}
677
678/* "Maximum Pipe Read Bandwidth" */
679static int intel_bw_crtc_min_cdclk(const struct intel_crtc_state *crtc_state)
680{
681 struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc)({ const __typeof( ((struct intel_crtc *)0)->base ) *__mptr
= (crtc_state->uapi.crtc); (struct intel_crtc *)( (char *
)__mptr - __builtin_offsetof(struct intel_crtc, base) );});
682 struct drm_i915_privateinteldrm_softc *i915 = to_i915(crtc->base.dev);
683
684 if (DISPLAY_VER(i915)((&(i915)->__runtime)->display.ip.ver) < 12)
685 return 0;
686
687 return DIV_ROUND_UP_ULL(mul_u32_u32(intel_bw_crtc_data_rate(crtc_state), 10), 512)(((mul_u32_u32(intel_bw_crtc_data_rate(crtc_state), 10)) + ((
512) - 1)) / (512));
688}
689
690void intel_bw_crtc_update(struct intel_bw_state *bw_state,
691 const struct intel_crtc_state *crtc_state)
692{
693 struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc)({ const __typeof( ((struct intel_crtc *)0)->base ) *__mptr
= (crtc_state->uapi.crtc); (struct intel_crtc *)( (char *
)__mptr - __builtin_offsetof(struct intel_crtc, base) );});
694 struct drm_i915_privateinteldrm_softc *i915 = to_i915(crtc->base.dev);
695
696 bw_state->data_rate[crtc->pipe] =
697 intel_bw_crtc_data_rate(crtc_state);
698 bw_state->num_active_planes[crtc->pipe] =
699 intel_bw_crtc_num_active_planes(crtc_state);
700
701 drm_dbg_kms(&i915->drm, "pipe %c data rate %u num active planes %u\n",__drm_dev_dbg(((void *)0), (&i915->drm) ? (&i915->
drm)->dev : ((void *)0), DRM_UT_KMS, "pipe %c data rate %u num active planes %u\n"
, ((crtc->pipe) + 'A'), bw_state->data_rate[crtc->pipe
], bw_state->num_active_planes[crtc->pipe])
702 pipe_name(crtc->pipe),__drm_dev_dbg(((void *)0), (&i915->drm) ? (&i915->
drm)->dev : ((void *)0), DRM_UT_KMS, "pipe %c data rate %u num active planes %u\n"
, ((crtc->pipe) + 'A'), bw_state->data_rate[crtc->pipe
], bw_state->num_active_planes[crtc->pipe])
703 bw_state->data_rate[crtc->pipe],__drm_dev_dbg(((void *)0), (&i915->drm) ? (&i915->
drm)->dev : ((void *)0), DRM_UT_KMS, "pipe %c data rate %u num active planes %u\n"
, ((crtc->pipe) + 'A'), bw_state->data_rate[crtc->pipe
], bw_state->num_active_planes[crtc->pipe])
704 bw_state->num_active_planes[crtc->pipe])__drm_dev_dbg(((void *)0), (&i915->drm) ? (&i915->
drm)->dev : ((void *)0), DRM_UT_KMS, "pipe %c data rate %u num active planes %u\n"
, ((crtc->pipe) + 'A'), bw_state->data_rate[crtc->pipe
], bw_state->num_active_planes[crtc->pipe]);
705}
706
707static unsigned int intel_bw_num_active_planes(struct drm_i915_privateinteldrm_softc *dev_priv,
708 const struct intel_bw_state *bw_state)
709{
710 unsigned int num_active_planes = 0;
711 enum pipe pipe;
712
713 for_each_pipe(dev_priv, pipe)for ((pipe) = 0; (pipe) < I915_MAX_PIPES; (pipe)++) if (!(
(&(dev_priv)->__runtime)->pipe_mask & (1UL <<
(pipe)))) {} else
714 num_active_planes += bw_state->num_active_planes[pipe];
715
716 return num_active_planes;
717}
718
719static unsigned int intel_bw_data_rate(struct drm_i915_privateinteldrm_softc *dev_priv,
720 const struct intel_bw_state *bw_state)
721{
722 unsigned int data_rate = 0;
723 enum pipe pipe;
724
725 for_each_pipe(dev_priv, pipe)for ((pipe) = 0; (pipe) < I915_MAX_PIPES; (pipe)++) if (!(
(&(dev_priv)->__runtime)->pipe_mask & (1UL <<
(pipe)))) {} else
726 data_rate += bw_state->data_rate[pipe];
727
728 if (DISPLAY_VER(dev_priv)((&(dev_priv)->__runtime)->display.ip.ver) >= 13 && i915_vtd_active(dev_priv))
729 data_rate = DIV_ROUND_UP(data_rate * 105, 100)(((data_rate * 105) + ((100) - 1)) / (100));
730
731 return data_rate;
732}
733
734struct intel_bw_state *
735intel_atomic_get_old_bw_state(struct intel_atomic_state *state)
736{
737 struct drm_i915_privateinteldrm_softc *dev_priv = to_i915(state->base.dev);
738 struct intel_global_state *bw_state;
739
740 bw_state = intel_atomic_get_old_global_obj_state(state, &dev_priv->display.bw.obj);
741
742 return to_intel_bw_state(bw_state)({ const __typeof( ((struct intel_bw_state *)0)->base ) *__mptr
= ((bw_state)); (struct intel_bw_state *)( (char *)__mptr - __builtin_offsetof
(struct intel_bw_state, base) );});
743}
744
745struct intel_bw_state *
746intel_atomic_get_new_bw_state(struct intel_atomic_state *state)
747{
748 struct drm_i915_privateinteldrm_softc *dev_priv = to_i915(state->base.dev);
749 struct intel_global_state *bw_state;
750
751 bw_state = intel_atomic_get_new_global_obj_state(state, &dev_priv->display.bw.obj);
752
753 return to_intel_bw_state(bw_state)({ const __typeof( ((struct intel_bw_state *)0)->base ) *__mptr
= ((bw_state)); (struct intel_bw_state *)( (char *)__mptr - __builtin_offsetof
(struct intel_bw_state, base) );});
754}
755
756struct intel_bw_state *
757intel_atomic_get_bw_state(struct intel_atomic_state *state)
758{
759 struct drm_i915_privateinteldrm_softc *dev_priv = to_i915(state->base.dev);
760 struct intel_global_state *bw_state;
761
762 bw_state = intel_atomic_get_global_obj_state(state, &dev_priv->display.bw.obj);
763 if (IS_ERR(bw_state))
764 return ERR_CAST(bw_state);
765
766 return to_intel_bw_state(bw_state)({ const __typeof( ((struct intel_bw_state *)0)->base ) *__mptr
= ((bw_state)); (struct intel_bw_state *)( (char *)__mptr - __builtin_offsetof
(struct intel_bw_state, base) );});
767}
768
769static bool_Bool intel_bw_state_changed(struct drm_i915_privateinteldrm_softc *i915,
770 const struct intel_bw_state *old_bw_state,
771 const struct intel_bw_state *new_bw_state)
772{
773 enum pipe pipe;
774
775 for_each_pipe(i915, pipe)for ((pipe) = 0; (pipe) < I915_MAX_PIPES; (pipe)++) if (!(
(&(i915)->__runtime)->pipe_mask & (1UL <<
(pipe)))) {} else {
776 const struct intel_dbuf_bw *old_crtc_bw =
777 &old_bw_state->dbuf_bw[pipe];
778 const struct intel_dbuf_bw *new_crtc_bw =
779 &new_bw_state->dbuf_bw[pipe];
780 enum dbuf_slice slice;
781
782 for_each_dbuf_slice(i915, slice)for ((slice) = DBUF_S1; (slice) < I915_MAX_DBUF_SLICES; (slice
)++) if (!((&(i915)->__info)->display.dbuf.slice_mask
& (1UL << (slice)))) {} else {
783 if (old_crtc_bw->max_bw[slice] != new_crtc_bw->max_bw[slice] ||
784 old_crtc_bw->active_planes[slice] != new_crtc_bw->active_planes[slice])
785 return true1;
786 }
787
788 if (old_bw_state->min_cdclk[pipe] != new_bw_state->min_cdclk[pipe])
789 return true1;
790 }
791
792 return false0;
793}
794
795static void skl_plane_calc_dbuf_bw(struct intel_bw_state *bw_state,
796 struct intel_crtc *crtc,
797 enum plane_id plane_id,
798 const struct skl_ddb_entry *ddb,
799 unsigned int data_rate)
800{
801 struct drm_i915_privateinteldrm_softc *i915 = to_i915(crtc->base.dev);
802 struct intel_dbuf_bw *crtc_bw = &bw_state->dbuf_bw[crtc->pipe];
803 unsigned int dbuf_mask = skl_ddb_dbuf_slice_mask(i915, ddb);
804 enum dbuf_slice slice;
805
806 /*
807 * The arbiter can only really guarantee an
808 * equal share of the total bw to each plane.
809 */
810 for_each_dbuf_slice_in_mask(i915, slice, dbuf_mask)for (((slice)) = DBUF_S1; ((slice)) < I915_MAX_DBUF_SLICES
; ((slice))++) if (!((&((i915))->__info)->display.dbuf
.slice_mask & (1UL << ((slice))))) {} else if (!((dbuf_mask
) & (1UL << (slice)))) {} else {
811 crtc_bw->max_bw[slice] = max(crtc_bw->max_bw[slice], data_rate)(((crtc_bw->max_bw[slice])>(data_rate))?(crtc_bw->max_bw
[slice]):(data_rate));
812 crtc_bw->active_planes[slice] |= BIT(plane_id)(1UL << (plane_id));
813 }
814}
815
816static void skl_crtc_calc_dbuf_bw(struct intel_bw_state *bw_state,
817 const struct intel_crtc_state *crtc_state)
818{
819 struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc)({ const __typeof( ((struct intel_crtc *)0)->base ) *__mptr
= (crtc_state->uapi.crtc); (struct intel_crtc *)( (char *
)__mptr - __builtin_offsetof(struct intel_crtc, base) );});
820 struct drm_i915_privateinteldrm_softc *i915 = to_i915(crtc->base.dev);
821 struct intel_dbuf_bw *crtc_bw = &bw_state->dbuf_bw[crtc->pipe];
822 enum plane_id plane_id;
823
824 memset(crtc_bw, 0, sizeof(*crtc_bw))__builtin_memset((crtc_bw), (0), (sizeof(*crtc_bw)));
825
826 if (!crtc_state->hw.active)
827 return;
828
829 for_each_plane_id_on_crtc(crtc, plane_id)for ((plane_id) = PLANE_PRIMARY; (plane_id) < I915_MAX_PLANES
; (plane_id)++) if (!((crtc)->plane_ids_mask & (1UL <<
(plane_id)))) {} else {
830 /*
831 * We assume cursors are small enough
832 * to not cause bandwidth problems.
833 */
834 if (plane_id == PLANE_CURSOR)
835 continue;
836
837 skl_plane_calc_dbuf_bw(bw_state, crtc, plane_id,
838 &crtc_state->wm.skl.plane_ddb[plane_id],
839 crtc_state->data_rate[plane_id]);
840
841 if (DISPLAY_VER(i915)((&(i915)->__runtime)->display.ip.ver) < 11)
842 skl_plane_calc_dbuf_bw(bw_state, crtc, plane_id,
843 &crtc_state->wm.skl.plane_ddb_y[plane_id],
844 crtc_state->data_rate[plane_id]);
845 }
846}
847
848/* "Maximum Data Buffer Bandwidth" */
849static int
850intel_bw_dbuf_min_cdclk(struct drm_i915_privateinteldrm_softc *i915,
851 const struct intel_bw_state *bw_state)
852{
853 unsigned int total_max_bw = 0;
854 enum dbuf_slice slice;
855
856 for_each_dbuf_slice(i915, slice)for ((slice) = DBUF_S1; (slice) < I915_MAX_DBUF_SLICES; (slice
)++) if (!((&(i915)->__info)->display.dbuf.slice_mask
& (1UL << (slice)))) {} else {
857 int num_active_planes = 0;
858 unsigned int max_bw = 0;
859 enum pipe pipe;
860
861 /*
862 * The arbiter can only really guarantee an
863 * equal share of the total bw to each plane.
864 */
865 for_each_pipe(i915, pipe)for ((pipe) = 0; (pipe) < I915_MAX_PIPES; (pipe)++) if (!(
(&(i915)->__runtime)->pipe_mask & (1UL <<
(pipe)))) {} else {
866 const struct intel_dbuf_bw *crtc_bw = &bw_state->dbuf_bw[pipe];
867
868 max_bw = max(crtc_bw->max_bw[slice], max_bw)(((crtc_bw->max_bw[slice])>(max_bw))?(crtc_bw->max_bw
[slice]):(max_bw));
869 num_active_planes += hweight8(crtc_bw->active_planes[slice]);
870 }
871 max_bw *= num_active_planes;
872
873 total_max_bw = max(total_max_bw, max_bw)(((total_max_bw)>(max_bw))?(total_max_bw):(max_bw));
874 }
875
876 return DIV_ROUND_UP(total_max_bw, 64)(((total_max_bw) + ((64) - 1)) / (64));
877}
878
879int intel_bw_min_cdclk(struct drm_i915_privateinteldrm_softc *i915,
880 const struct intel_bw_state *bw_state)
881{
882 enum pipe pipe;
883 int min_cdclk;
884
885 min_cdclk = intel_bw_dbuf_min_cdclk(i915, bw_state);
886
887 for_each_pipe(i915, pipe)for ((pipe) = 0; (pipe) < I915_MAX_PIPES; (pipe)++) if (!(
(&(i915)->__runtime)->pipe_mask & (1UL <<
(pipe)))) {} else
888 min_cdclk = max(bw_state->min_cdclk[pipe], min_cdclk)(((bw_state->min_cdclk[pipe])>(min_cdclk))?(bw_state->
min_cdclk[pipe]):(min_cdclk));
889
890 return min_cdclk;
891}
892
893int intel_bw_calc_min_cdclk(struct intel_atomic_state *state,
894 bool_Bool *need_cdclk_calc)
895{
896 struct drm_i915_privateinteldrm_softc *dev_priv = to_i915(state->base.dev);
897 struct intel_bw_state *new_bw_state = NULL((void *)0);
898 const struct intel_bw_state *old_bw_state = NULL((void *)0);
899 const struct intel_cdclk_state *cdclk_state;
900 const struct intel_crtc_state *crtc_state;
901 int old_min_cdclk, new_min_cdclk;
902 struct intel_crtc *crtc;
903 int i;
904
905 if (DISPLAY_VER(dev_priv)((&(dev_priv)->__runtime)->display.ip.ver) < 9)
906 return 0;
907
908 for_each_new_intel_crtc_in_state(state, crtc, crtc_state, i)for ((i) = 0; (i) < (state)->base.dev->mode_config.num_crtc
&& ((crtc) = ({ const __typeof( ((struct intel_crtc *
)0)->base ) *__mptr = ((state)->base.crtcs[i].ptr); (struct
intel_crtc *)( (char *)__mptr - __builtin_offsetof(struct intel_crtc
, base) );}), (crtc_state) = ({ const __typeof( ((struct intel_crtc_state
*)0)->uapi ) *__mptr = ((state)->base.crtcs[i].new_state
); (struct intel_crtc_state *)( (char *)__mptr - __builtin_offsetof
(struct intel_crtc_state, uapi) );}), 1); (i)++) if (!(crtc))
{} else {
909 new_bw_state = intel_atomic_get_bw_state(state);
910 if (IS_ERR(new_bw_state))
911 return PTR_ERR(new_bw_state);
912
913 old_bw_state = intel_atomic_get_old_bw_state(state);
914
915 skl_crtc_calc_dbuf_bw(new_bw_state, crtc_state);
916
917 new_bw_state->min_cdclk[crtc->pipe] =
918 intel_bw_crtc_min_cdclk(crtc_state);
919 }
920
921 if (!old_bw_state)
922 return 0;
923
924 if (intel_bw_state_changed(dev_priv, old_bw_state, new_bw_state)) {
925 int ret = intel_atomic_lock_global_state(&new_bw_state->base);
926 if (ret)
927 return ret;
928 }
929
930 old_min_cdclk = intel_bw_min_cdclk(dev_priv, old_bw_state);
931 new_min_cdclk = intel_bw_min_cdclk(dev_priv, new_bw_state);
932
933 /*
934 * No need to check against the cdclk state if
935 * the min cdclk doesn't increase.
936 *
937 * Ie. we only ever increase the cdclk due to bandwidth
938 * requirements. This can reduce back and forth
939 * display blinking due to constant cdclk changes.
940 */
941 if (new_min_cdclk <= old_min_cdclk)
942 return 0;
943
944 cdclk_state = intel_atomic_get_cdclk_state(state);
945 if (IS_ERR(cdclk_state))
946 return PTR_ERR(cdclk_state);
947
948 /*
949 * No need to recalculate the cdclk state if
950 * the min cdclk doesn't increase.
951 *
952 * Ie. we only ever increase the cdclk due to bandwidth
953 * requirements. This can reduce back and forth
954 * display blinking due to constant cdclk changes.
955 */
956 if (new_min_cdclk <= cdclk_state->bw_min_cdclk)
957 return 0;
958
959 drm_dbg_kms(&dev_priv->drm,__drm_dev_dbg(((void *)0), (&dev_priv->drm) ? (&dev_priv
->drm)->dev : ((void *)0), DRM_UT_KMS, "new bandwidth min cdclk (%d kHz) > old min cdclk (%d kHz)\n"
, new_min_cdclk, cdclk_state->bw_min_cdclk)
960 "new bandwidth min cdclk (%d kHz) > old min cdclk (%d kHz)\n",__drm_dev_dbg(((void *)0), (&dev_priv->drm) ? (&dev_priv
->drm)->dev : ((void *)0), DRM_UT_KMS, "new bandwidth min cdclk (%d kHz) > old min cdclk (%d kHz)\n"
, new_min_cdclk, cdclk_state->bw_min_cdclk)
961 new_min_cdclk, cdclk_state->bw_min_cdclk)__drm_dev_dbg(((void *)0), (&dev_priv->drm) ? (&dev_priv
->drm)->dev : ((void *)0), DRM_UT_KMS, "new bandwidth min cdclk (%d kHz) > old min cdclk (%d kHz)\n"
, new_min_cdclk, cdclk_state->bw_min_cdclk);
962 *need_cdclk_calc = true1;
963
964 return 0;
965}
966
967static u16 icl_qgv_points_mask(struct drm_i915_privateinteldrm_softc *i915)
968{
969 unsigned int num_psf_gv_points = i915->display.bw.max[0].num_psf_gv_points;
970 unsigned int num_qgv_points = i915->display.bw.max[0].num_qgv_points;
971 u16 qgv_points = 0, psf_points = 0;
972
973 /*
974 * We can _not_ use the whole ADLS_QGV_PT_MASK here, as PCode rejects
975 * it with failure if we try masking any unadvertised points.
976 * So need to operate only with those returned from PCode.
977 */
978 if (num_qgv_points > 0)
979 qgv_points = GENMASK(num_qgv_points - 1, 0)(((~0UL) >> (64 - (num_qgv_points - 1) - 1)) & ((~0UL
) << (0)));
980
981 if (num_psf_gv_points > 0)
982 psf_points = GENMASK(num_psf_gv_points - 1, 0)(((~0UL) >> (64 - (num_psf_gv_points - 1) - 1)) & (
(~0UL) << (0)));
983
984 return ICL_PCODE_REQ_QGV_PT(qgv_points)((u32)((((typeof(((u32)((((~0UL) >> (64 - (7) - 1)) &
((~0UL) << (0))) + 0))))((qgv_points)) << (__builtin_ffsll
(((u32)((((~0UL) >> (64 - (7) - 1)) & ((~0UL) <<
(0))) + 0))) - 1)) & (((u32)((((~0UL) >> (64 - (7)
- 1)) & ((~0UL) << (0))) + 0)))) + 0 + 0 + 0 + 0)) | ADLS_PCODE_REQ_PSF_PT(psf_points)((u32)((((typeof(((u32)((((~0UL) >> (64 - (10) - 1)) &
((~0UL) << (8))) + 0))))((psf_points)) << (__builtin_ffsll
(((u32)((((~0UL) >> (64 - (10) - 1)) & ((~0UL) <<
(8))) + 0))) - 1)) & (((u32)((((~0UL) >> (64 - (10
) - 1)) & ((~0UL) << (8))) + 0)))) + 0 + 0 + 0 + 0)
);
985}
986
987static int intel_bw_check_data_rate(struct intel_atomic_state *state, bool_Bool *changed)
988{
989 struct drm_i915_privateinteldrm_softc *i915 = to_i915(state->base.dev);
990 const struct intel_crtc_state *new_crtc_state, *old_crtc_state;
991 struct intel_crtc *crtc;
992 int i;
993
994 for_each_oldnew_intel_crtc_in_state(state, crtc, old_crtc_state,for ((i) = 0; (i) < (state)->base.dev->mode_config.num_crtc
&& ((crtc) = ({ const __typeof( ((struct intel_crtc *
)0)->base ) *__mptr = ((state)->base.crtcs[i].ptr); (struct
intel_crtc *)( (char *)__mptr - __builtin_offsetof(struct intel_crtc
, base) );}), (old_crtc_state) = ({ const __typeof( ((struct intel_crtc_state
*)0)->uapi ) *__mptr = ((state)->base.crtcs[i].old_state
); (struct intel_crtc_state *)( (char *)__mptr - __builtin_offsetof
(struct intel_crtc_state, uapi) );}), (new_crtc_state) = ({ const
__typeof( ((struct intel_crtc_state *)0)->uapi ) *__mptr =
((state)->base.crtcs[i].new_state); (struct intel_crtc_state
*)( (char *)__mptr - __builtin_offsetof(struct intel_crtc_state
, uapi) );}), 1); (i)++) if (!(crtc)) {} else
995 new_crtc_state, i)for ((i) = 0; (i) < (state)->base.dev->mode_config.num_crtc
&& ((crtc) = ({ const __typeof( ((struct intel_crtc *
)0)->base ) *__mptr = ((state)->base.crtcs[i].ptr); (struct
intel_crtc *)( (char *)__mptr - __builtin_offsetof(struct intel_crtc
, base) );}), (old_crtc_state) = ({ const __typeof( ((struct intel_crtc_state
*)0)->uapi ) *__mptr = ((state)->base.crtcs[i].old_state
); (struct intel_crtc_state *)( (char *)__mptr - __builtin_offsetof
(struct intel_crtc_state, uapi) );}), (new_crtc_state) = ({ const
__typeof( ((struct intel_crtc_state *)0)->uapi ) *__mptr =
((state)->base.crtcs[i].new_state); (struct intel_crtc_state
*)( (char *)__mptr - __builtin_offsetof(struct intel_crtc_state
, uapi) );}), 1); (i)++) if (!(crtc)) {} else {
996 unsigned int old_data_rate =
997 intel_bw_crtc_data_rate(old_crtc_state);
998 unsigned int new_data_rate =
999 intel_bw_crtc_data_rate(new_crtc_state);
1000 unsigned int old_active_planes =
1001 intel_bw_crtc_num_active_planes(old_crtc_state);
1002 unsigned int new_active_planes =
1003 intel_bw_crtc_num_active_planes(new_crtc_state);
1004 struct intel_bw_state *new_bw_state;
1005
1006 /*
1007 * Avoid locking the bw state when
1008 * nothing significant has changed.
1009 */
1010 if (old_data_rate == new_data_rate &&
1011 old_active_planes == new_active_planes)
1012 continue;
1013
1014 new_bw_state = intel_atomic_get_bw_state(state);
1015 if (IS_ERR(new_bw_state))
1016 return PTR_ERR(new_bw_state);
1017
1018 new_bw_state->data_rate[crtc->pipe] = new_data_rate;
1019 new_bw_state->num_active_planes[crtc->pipe] = new_active_planes;
1020
1021 *changed = true1;
1022
1023 drm_dbg_kms(&i915->drm,__drm_dev_dbg(((void *)0), (&i915->drm) ? (&i915->
drm)->dev : ((void *)0), DRM_UT_KMS, "[CRTC:%d:%s] data rate %u num active planes %u\n"
, crtc->base.base.id, crtc->base.name, new_bw_state->
data_rate[crtc->pipe], new_bw_state->num_active_planes[
crtc->pipe])
1024 "[CRTC:%d:%s] data rate %u num active planes %u\n",__drm_dev_dbg(((void *)0), (&i915->drm) ? (&i915->
drm)->dev : ((void *)0), DRM_UT_KMS, "[CRTC:%d:%s] data rate %u num active planes %u\n"
, crtc->base.base.id, crtc->base.name, new_bw_state->
data_rate[crtc->pipe], new_bw_state->num_active_planes[
crtc->pipe])
1025 crtc->base.base.id, crtc->base.name,__drm_dev_dbg(((void *)0), (&i915->drm) ? (&i915->
drm)->dev : ((void *)0), DRM_UT_KMS, "[CRTC:%d:%s] data rate %u num active planes %u\n"
, crtc->base.base.id, crtc->base.name, new_bw_state->
data_rate[crtc->pipe], new_bw_state->num_active_planes[
crtc->pipe])
1026 new_bw_state->data_rate[crtc->pipe],__drm_dev_dbg(((void *)0), (&i915->drm) ? (&i915->
drm)->dev : ((void *)0), DRM_UT_KMS, "[CRTC:%d:%s] data rate %u num active planes %u\n"
, crtc->base.base.id, crtc->base.name, new_bw_state->
data_rate[crtc->pipe], new_bw_state->num_active_planes[
crtc->pipe])
1027 new_bw_state->num_active_planes[crtc->pipe])__drm_dev_dbg(((void *)0), (&i915->drm) ? (&i915->
drm)->dev : ((void *)0), DRM_UT_KMS, "[CRTC:%d:%s] data rate %u num active planes %u\n"
, crtc->base.base.id, crtc->base.name, new_bw_state->
data_rate[crtc->pipe], new_bw_state->num_active_planes[
crtc->pipe]);
1028 }
1029
1030 return 0;
1031}
1032
1033int intel_bw_atomic_check(struct intel_atomic_state *state)
1034{
1035 struct drm_i915_privateinteldrm_softc *dev_priv = to_i915(state->base.dev);
1036 const struct intel_bw_state *old_bw_state;
1037 struct intel_bw_state *new_bw_state;
1038 unsigned int data_rate;
1039 unsigned int num_active_planes;
1040 int i, ret;
1041 u16 qgv_points = 0, psf_points = 0;
1042 unsigned int max_bw_point = 0, max_bw = 0;
1043 unsigned int num_qgv_points = dev_priv->display.bw.max[0].num_qgv_points;
1044 unsigned int num_psf_gv_points = dev_priv->display.bw.max[0].num_psf_gv_points;
1045 bool_Bool changed = false0;
1046
1047 /* FIXME earlier gens need some checks too */
1048 if (DISPLAY_VER(dev_priv)((&(dev_priv)->__runtime)->display.ip.ver) < 11)
1049 return 0;
1050
1051 ret = intel_bw_check_data_rate(state, &changed);
1052 if (ret)
1053 return ret;
1054
1055 old_bw_state = intel_atomic_get_old_bw_state(state);
1056 new_bw_state = intel_atomic_get_new_bw_state(state);
1057
1058 if (new_bw_state &&
1059 intel_can_enable_sagv(dev_priv, old_bw_state) !=
1060 intel_can_enable_sagv(dev_priv, new_bw_state))
1061 changed = true1;
1062
1063 /*
1064 * If none of our inputs (data rates, number of active
1065 * planes, SAGV yes/no) changed then nothing to do here.
1066 */
1067 if (!changed)
1068 return 0;
1069
1070 ret = intel_atomic_lock_global_state(&new_bw_state->base);
1071 if (ret)
1072 return ret;
1073
1074 data_rate = intel_bw_data_rate(dev_priv, new_bw_state);
1075 data_rate = DIV_ROUND_UP(data_rate, 1000)(((data_rate) + ((1000) - 1)) / (1000));
1076
1077 num_active_planes = intel_bw_num_active_planes(dev_priv, new_bw_state);
1078
1079 for (i = 0; i < num_qgv_points; i++) {
1080 unsigned int max_data_rate;
1081
1082 if (DISPLAY_VER(dev_priv)((&(dev_priv)->__runtime)->display.ip.ver) > 11)
1083 max_data_rate = tgl_max_bw(dev_priv, num_active_planes, i);
1084 else
1085 max_data_rate = icl_max_bw(dev_priv, num_active_planes, i);
1086 /*
1087 * We need to know which qgv point gives us
1088 * maximum bandwidth in order to disable SAGV
1089 * if we find that we exceed SAGV block time
1090 * with watermarks. By that moment we already
1091 * have those, as it is calculated earlier in
1092 * intel_atomic_check,
1093 */
1094 if (max_data_rate > max_bw) {
1095 max_bw_point = i;
1096 max_bw = max_data_rate;
1097 }
1098 if (max_data_rate >= data_rate)
1099 qgv_points |= BIT(i)(1UL << (i));
1100
1101 drm_dbg_kms(&dev_priv->drm, "QGV point %d: max bw %d required %d\n",__drm_dev_dbg(((void *)0), (&dev_priv->drm) ? (&dev_priv
->drm)->dev : ((void *)0), DRM_UT_KMS, "QGV point %d: max bw %d required %d\n"
, i, max_data_rate, data_rate)
1102 i, max_data_rate, data_rate)__drm_dev_dbg(((void *)0), (&dev_priv->drm) ? (&dev_priv
->drm)->dev : ((void *)0), DRM_UT_KMS, "QGV point %d: max bw %d required %d\n"
, i, max_data_rate, data_rate);
1103 }
1104
1105 for (i = 0; i < num_psf_gv_points; i++) {
1106 unsigned int max_data_rate = adl_psf_bw(dev_priv, i);
1107
1108 if (max_data_rate >= data_rate)
1109 psf_points |= BIT(i)(1UL << (i));
1110
1111 drm_dbg_kms(&dev_priv->drm, "PSF GV point %d: max bw %d"__drm_dev_dbg(((void *)0), (&dev_priv->drm) ? (&dev_priv
->drm)->dev : ((void *)0), DRM_UT_KMS, "PSF GV point %d: max bw %d"
" required %d\n", i, max_data_rate, data_rate)
1112 " required %d\n",__drm_dev_dbg(((void *)0), (&dev_priv->drm) ? (&dev_priv
->drm)->dev : ((void *)0), DRM_UT_KMS, "PSF GV point %d: max bw %d"
" required %d\n", i, max_data_rate, data_rate)
1113 i, max_data_rate, data_rate)__drm_dev_dbg(((void *)0), (&dev_priv->drm) ? (&dev_priv
->drm)->dev : ((void *)0), DRM_UT_KMS, "PSF GV point %d: max bw %d"
" required %d\n", i, max_data_rate, data_rate);
1114 }
1115
1116 /*
1117 * BSpec states that we always should have at least one allowed point
1118 * left, so if we couldn't - simply reject the configuration for obvious
1119 * reasons.
1120 */
1121 if (qgv_points == 0) {
1122 drm_dbg_kms(&dev_priv->drm, "No QGV points provide sufficient memory"__drm_dev_dbg(((void *)0), (&dev_priv->drm) ? (&dev_priv
->drm)->dev : ((void *)0), DRM_UT_KMS, "No QGV points provide sufficient memory"
" bandwidth %d for display configuration(%d active planes).\n"
, data_rate, num_active_planes)
1123 " bandwidth %d for display configuration(%d active planes).\n",__drm_dev_dbg(((void *)0), (&dev_priv->drm) ? (&dev_priv
->drm)->dev : ((void *)0), DRM_UT_KMS, "No QGV points provide sufficient memory"
" bandwidth %d for display configuration(%d active planes).\n"
, data_rate, num_active_planes)
1124 data_rate, num_active_planes)__drm_dev_dbg(((void *)0), (&dev_priv->drm) ? (&dev_priv
->drm)->dev : ((void *)0), DRM_UT_KMS, "No QGV points provide sufficient memory"
" bandwidth %d for display configuration(%d active planes).\n"
, data_rate, num_active_planes);
1125 return -EINVAL22;
1126 }
1127
1128 if (num_psf_gv_points > 0 && psf_points == 0) {
1129 drm_dbg_kms(&dev_priv->drm, "No PSF GV points provide sufficient memory"__drm_dev_dbg(((void *)0), (&dev_priv->drm) ? (&dev_priv
->drm)->dev : ((void *)0), DRM_UT_KMS, "No PSF GV points provide sufficient memory"
" bandwidth %d for display configuration(%d active planes).\n"
, data_rate, num_active_planes)
1130 " bandwidth %d for display configuration(%d active planes).\n",__drm_dev_dbg(((void *)0), (&dev_priv->drm) ? (&dev_priv
->drm)->dev : ((void *)0), DRM_UT_KMS, "No PSF GV points provide sufficient memory"
" bandwidth %d for display configuration(%d active planes).\n"
, data_rate, num_active_planes)
1131 data_rate, num_active_planes)__drm_dev_dbg(((void *)0), (&dev_priv->drm) ? (&dev_priv
->drm)->dev : ((void *)0), DRM_UT_KMS, "No PSF GV points provide sufficient memory"
" bandwidth %d for display configuration(%d active planes).\n"
, data_rate, num_active_planes);
1132 return -EINVAL22;
1133 }
1134
1135 /*
1136 * Leave only single point with highest bandwidth, if
1137 * we can't enable SAGV due to the increased memory latency it may
1138 * cause.
1139 */
1140 if (!intel_can_enable_sagv(dev_priv, new_bw_state)) {
1141 qgv_points = BIT(max_bw_point)(1UL << (max_bw_point));
1142 drm_dbg_kms(&dev_priv->drm, "No SAGV, using single QGV point %d\n",__drm_dev_dbg(((void *)0), (&dev_priv->drm) ? (&dev_priv
->drm)->dev : ((void *)0), DRM_UT_KMS, "No SAGV, using single QGV point %d\n"
, max_bw_point)
1143 max_bw_point)__drm_dev_dbg(((void *)0), (&dev_priv->drm) ? (&dev_priv
->drm)->dev : ((void *)0), DRM_UT_KMS, "No SAGV, using single QGV point %d\n"
, max_bw_point);
1144 }
1145
1146 /*
1147 * We store the ones which need to be masked as that is what PCode
1148 * actually accepts as a parameter.
1149 */
1150 new_bw_state->qgv_points_mask =
1151 ~(ICL_PCODE_REQ_QGV_PT(qgv_points)((u32)((((typeof(((u32)((((~0UL) >> (64 - (7) - 1)) &
((~0UL) << (0))) + 0))))((qgv_points)) << (__builtin_ffsll
(((u32)((((~0UL) >> (64 - (7) - 1)) & ((~0UL) <<
(0))) + 0))) - 1)) & (((u32)((((~0UL) >> (64 - (7)
- 1)) & ((~0UL) << (0))) + 0)))) + 0 + 0 + 0 + 0)) |
1152 ADLS_PCODE_REQ_PSF_PT(psf_points)((u32)((((typeof(((u32)((((~0UL) >> (64 - (10) - 1)) &
((~0UL) << (8))) + 0))))((psf_points)) << (__builtin_ffsll
(((u32)((((~0UL) >> (64 - (10) - 1)) & ((~0UL) <<
(8))) + 0))) - 1)) & (((u32)((((~0UL) >> (64 - (10
) - 1)) & ((~0UL) << (8))) + 0)))) + 0 + 0 + 0 + 0)
)) &
1153 icl_qgv_points_mask(dev_priv);
1154
1155 /*
1156 * If the actual mask had changed we need to make sure that
1157 * the commits are serialized(in case this is a nomodeset, nonblocking)
1158 */
1159 if (new_bw_state->qgv_points_mask != old_bw_state->qgv_points_mask) {
1160 ret = intel_atomic_serialize_global_state(&new_bw_state->base);
1161 if (ret)
1162 return ret;
1163 }
1164
1165 return 0;
1166}
1167
1168static struct intel_global_state *
1169intel_bw_duplicate_state(struct intel_global_obj *obj)
1170{
1171 struct intel_bw_state *state;
1172
1173 state = kmemdup(obj->state, sizeof(*state), GFP_KERNEL(0x0001 | 0x0004));
1174 if (!state)
1175 return NULL((void *)0);
1176
1177 return &state->base;
1178}
1179
1180static void intel_bw_destroy_state(struct intel_global_obj *obj,
1181 struct intel_global_state *state)
1182{
1183 kfree(state);
1184}
1185
1186static const struct intel_global_state_funcs intel_bw_funcs = {
1187 .atomic_duplicate_state = intel_bw_duplicate_state,
1188 .atomic_destroy_state = intel_bw_destroy_state,
1189};
1190
1191int intel_bw_init(struct drm_i915_privateinteldrm_softc *dev_priv)
1192{
1193 struct intel_bw_state *state;
1194
1195 state = kzalloc(sizeof(*state), GFP_KERNEL(0x0001 | 0x0004));
1196 if (!state)
1197 return -ENOMEM12;
1198
1199 intel_atomic_global_obj_init(dev_priv, &dev_priv->display.bw.obj,
1200 &state->base, &intel_bw_funcs);
1201
1202 return 0;
1203}