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