1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* Copyright (c) 2017 The Linux Foundation. All rights reserved. */
3
4 #ifndef _A6XX_GMU_H_
5 #define _A6XX_GMU_H_
6
7 #include <linux/completion.h>
8 #include <linux/iopoll.h>
9 #include <linux/interrupt.h>
10 #include <linux/notifier.h>
11 #include <linux/soc/qcom/qcom_aoss.h>
12 #include "msm_drv.h"
13 #include "a6xx_hfi.h"
14
15 struct a6xx_gmu_bo {
16 struct drm_gem_object *obj;
17 void *virt;
18 size_t size;
19 u64 iova;
20 };
21
22 /*
23 * These define the different GMU wake up options - these define how both the
24 * CPU and the GMU bring up the hardware
25 */
26
27 /* THe GMU has already been booted and the rentention registers are active */
28 #define GMU_WARM_BOOT 0
29
30 /* the GMU is coming up for the first time or back from a power collapse */
31 #define GMU_COLD_BOOT 1
32
33 /*
34 * These define the level of control that the GMU has - the higher the number
35 * the more things that the GMU hardware controls on its own.
36 */
37
38 /* The GMU does not do any idle state management */
39 #define GMU_IDLE_STATE_ACTIVE 0
40
41 /* The GMU manages SPTP power collapse */
42 #define GMU_IDLE_STATE_SPTP 2
43
44 /* The GMU does automatic IFPC (intra-frame power collapse) */
45 #define GMU_IDLE_STATE_IFPC 3
46
47 struct a6xx_gmu {
48 struct device *dev;
49
50 /* For serializing communication with the GMU: */
51 struct mutex lock;
52
53 struct msm_gem_address_space *aspace;
54
55 void __iomem *mmio;
56 void __iomem *rscc;
57
58 int hfi_irq;
59 int gmu_irq;
60
61 struct device *gxpd;
62 struct device *cxpd;
63
64 int idle_level;
65
66 struct a6xx_gmu_bo hfi;
67 struct a6xx_gmu_bo debug;
68 struct a6xx_gmu_bo icache;
69 struct a6xx_gmu_bo dcache;
70 struct a6xx_gmu_bo dummy;
71 struct a6xx_gmu_bo log;
72
73 int nr_clocks;
74 struct clk_bulk_data *clocks;
75 struct clk *core_clk;
76 struct clk *hub_clk;
77
78 /* current performance index set externally */
79 int current_perf_index;
80
81 int nr_gpu_freqs;
82 unsigned long gpu_freqs[16];
83 u32 gx_arc_votes[16];
84
85 int nr_gmu_freqs;
86 unsigned long gmu_freqs[4];
87 u32 cx_arc_votes[4];
88
89 unsigned long freq;
90
91 struct a6xx_hfi_queue queues[2];
92
93 bool initialized;
94 bool hung;
95 bool legacy; /* a618 or a630 */
96
97 /* For power domain callback */
98 struct notifier_block pd_nb;
99 struct completion pd_gate;
100
101 struct qmp *qmp;
102 };
103
gmu_read(struct a6xx_gmu * gmu,u32 offset)104 static inline u32 gmu_read(struct a6xx_gmu *gmu, u32 offset)
105 {
106 return readl(gmu->mmio + (offset << 2));
107 }
108
gmu_write(struct a6xx_gmu * gmu,u32 offset,u32 value)109 static inline void gmu_write(struct a6xx_gmu *gmu, u32 offset, u32 value)
110 {
111 writel(value, gmu->mmio + (offset << 2));
112 }
113
114 static inline void
gmu_write_bulk(struct a6xx_gmu * gmu,u32 offset,const u32 * data,u32 size)115 gmu_write_bulk(struct a6xx_gmu *gmu, u32 offset, const u32 *data, u32 size)
116 {
117 memcpy_toio(gmu->mmio + (offset << 2), data, size);
118 wmb();
119 }
120
gmu_rmw(struct a6xx_gmu * gmu,u32 reg,u32 mask,u32 or)121 static inline void gmu_rmw(struct a6xx_gmu *gmu, u32 reg, u32 mask, u32 or)
122 {
123 u32 val = gmu_read(gmu, reg);
124
125 val &= ~mask;
126
127 gmu_write(gmu, reg, val | or);
128 }
129
gmu_read64(struct a6xx_gmu * gmu,u32 lo,u32 hi)130 static inline u64 gmu_read64(struct a6xx_gmu *gmu, u32 lo, u32 hi)
131 {
132 u64 val;
133
134 val = (u64) readl(gmu->mmio + (lo << 2));
135 val |= ((u64) readl(gmu->mmio + (hi << 2)) << 32);
136
137 return val;
138 }
139
140 #define gmu_poll_timeout(gmu, addr, val, cond, interval, timeout) \
141 readl_poll_timeout((gmu)->mmio + ((addr) << 2), val, cond, \
142 interval, timeout)
143
gmu_read_rscc(struct a6xx_gmu * gmu,u32 offset)144 static inline u32 gmu_read_rscc(struct a6xx_gmu *gmu, u32 offset)
145 {
146 return readl(gmu->rscc + (offset << 2));
147 }
148
gmu_write_rscc(struct a6xx_gmu * gmu,u32 offset,u32 value)149 static inline void gmu_write_rscc(struct a6xx_gmu *gmu, u32 offset, u32 value)
150 {
151 writel(value, gmu->rscc + (offset << 2));
152 }
153
154 #define gmu_poll_timeout_rscc(gmu, addr, val, cond, interval, timeout) \
155 readl_poll_timeout((gmu)->rscc + ((addr) << 2), val, cond, \
156 interval, timeout)
157
158 /*
159 * These are the available OOB (out of band requests) to the GMU where "out of
160 * band" means that the CPU talks to the GMU directly and not through HFI.
161 * Normally this works by writing a ITCM/DTCM register and then triggering a
162 * interrupt (the "request" bit) and waiting for an acknowledgment (the "ack"
163 * bit). The state is cleared by writing the "clear' bit to the GMU interrupt.
164 *
165 * These are used to force the GMU/GPU to stay on during a critical sequence or
166 * for hardware workarounds.
167 */
168
169 enum a6xx_gmu_oob_state {
170 /*
171 * Let the GMU know that a boot or slumber operation has started. The value in
172 * REG_A6XX_GMU_BOOT_SLUMBER_OPTION lets the GMU know which operation we are
173 * doing
174 */
175 GMU_OOB_BOOT_SLUMBER = 0,
176 /*
177 * Let the GMU know to not turn off any GPU registers while the CPU is in a
178 * critical section
179 */
180 GMU_OOB_GPU_SET,
181 /*
182 * Set a new power level for the GPU when the CPU is doing frequency scaling
183 */
184 GMU_OOB_DCVS_SET,
185 /*
186 * Used to keep the GPU on for CPU-side reads of performance counters.
187 */
188 GMU_OOB_PERFCOUNTER_SET,
189 };
190
191 void a6xx_hfi_init(struct a6xx_gmu *gmu);
192 int a6xx_hfi_start(struct a6xx_gmu *gmu, int boot_state);
193 void a6xx_hfi_stop(struct a6xx_gmu *gmu);
194 int a6xx_hfi_send_prep_slumber(struct a6xx_gmu *gmu);
195 int a6xx_hfi_set_freq(struct a6xx_gmu *gmu, int index);
196
197 bool a6xx_gmu_gx_is_on(struct a6xx_gmu *gmu);
198 bool a6xx_gmu_sptprac_is_on(struct a6xx_gmu *gmu);
199 void a6xx_sptprac_disable(struct a6xx_gmu *gmu);
200 int a6xx_sptprac_enable(struct a6xx_gmu *gmu);
201
202 #endif
203