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 void *virt; 14 size_t size; 15 u64 iova; 16 struct page **pages; 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 void * __iomem mmio; 48 49 int hfi_irq; 50 int gmu_irq; 51 52 struct iommu_domain *domain; 53 u64 uncached_iova_base; 54 55 struct device *gxpd; 56 57 int idle_level; 58 59 struct a6xx_gmu_bo *hfi; 60 struct a6xx_gmu_bo *debug; 61 62 int nr_clocks; 63 struct clk_bulk_data *clocks; 64 struct clk *core_clk; 65 66 int nr_gpu_freqs; 67 unsigned long gpu_freqs[16]; 68 u32 gx_arc_votes[16]; 69 70 int nr_gmu_freqs; 71 unsigned long gmu_freqs[4]; 72 u32 cx_arc_votes[4]; 73 74 unsigned long freq; 75 76 struct a6xx_hfi_queue queues[2]; 77 78 bool hung; 79 }; 80 81 static inline u32 gmu_read(struct a6xx_gmu *gmu, u32 offset) 82 { 83 return msm_readl(gmu->mmio + (offset << 2)); 84 } 85 86 static inline void gmu_write(struct a6xx_gmu *gmu, u32 offset, u32 value) 87 { 88 return msm_writel(value, gmu->mmio + (offset << 2)); 89 } 90 91 static inline void gmu_rmw(struct a6xx_gmu *gmu, u32 reg, u32 mask, u32 or) 92 { 93 u32 val = gmu_read(gmu, reg); 94 95 val &= ~mask; 96 97 gmu_write(gmu, reg, val | or); 98 } 99 100 static inline u64 gmu_read64(struct a6xx_gmu *gmu, u32 lo, u32 hi) 101 { 102 u64 val; 103 104 val = (u64) msm_readl(gmu->mmio + (lo << 2)); 105 val |= ((u64) msm_readl(gmu->mmio + (hi << 2)) << 32); 106 107 return val; 108 } 109 110 #define gmu_poll_timeout(gmu, addr, val, cond, interval, timeout) \ 111 readl_poll_timeout((gmu)->mmio + ((addr) << 2), val, cond, \ 112 interval, timeout) 113 114 /* 115 * These are the available OOB (out of band requests) to the GMU where "out of 116 * band" means that the CPU talks to the GMU directly and not through HFI. 117 * Normally this works by writing a ITCM/DTCM register and then triggering a 118 * interrupt (the "request" bit) and waiting for an acknowledgment (the "ack" 119 * bit). The state is cleared by writing the "clear' bit to the GMU interrupt. 120 * 121 * These are used to force the GMU/GPU to stay on during a critical sequence or 122 * for hardware workarounds. 123 */ 124 125 enum a6xx_gmu_oob_state { 126 GMU_OOB_BOOT_SLUMBER = 0, 127 GMU_OOB_GPU_SET, 128 GMU_OOB_DCVS_SET, 129 }; 130 131 /* These are the interrupt / ack bits for each OOB request that are set 132 * in a6xx_gmu_set_oob and a6xx_clear_oob 133 */ 134 135 /* 136 * Let the GMU know that a boot or slumber operation has started. The value in 137 * REG_A6XX_GMU_BOOT_SLUMBER_OPTION lets the GMU know which operation we are 138 * doing 139 */ 140 #define GMU_OOB_BOOT_SLUMBER_REQUEST 22 141 #define GMU_OOB_BOOT_SLUMBER_ACK 30 142 #define GMU_OOB_BOOT_SLUMBER_CLEAR 30 143 144 /* 145 * Set a new power level for the GPU when the CPU is doing frequency scaling 146 */ 147 #define GMU_OOB_DCVS_REQUEST 23 148 #define GMU_OOB_DCVS_ACK 31 149 #define GMU_OOB_DCVS_CLEAR 31 150 151 /* 152 * Let the GMU know to not turn off any GPU registers while the CPU is in a 153 * critical section 154 */ 155 #define GMU_OOB_GPU_SET_REQUEST 16 156 #define GMU_OOB_GPU_SET_ACK 24 157 #define GMU_OOB_GPU_SET_CLEAR 24 158 159 160 void a6xx_hfi_init(struct a6xx_gmu *gmu); 161 int a6xx_hfi_start(struct a6xx_gmu *gmu, int boot_state); 162 void a6xx_hfi_stop(struct a6xx_gmu *gmu); 163 164 bool a6xx_gmu_gx_is_on(struct a6xx_gmu *gmu); 165 bool a6xx_gmu_sptprac_is_on(struct a6xx_gmu *gmu); 166 167 #endif 168