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