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1// SPDX-License-Identifier: GPL-2.02 3/* Copyright (C) 2023-2024 Linaro Ltd. */4 5#include <linux/io.h>6#include <linux/platform_device.h>7 8#include "gsi.h"9#include "gsi_reg.h"10#include "reg.h"11 12/* Is this register ID valid for the current GSI version? */13static bool gsi_reg_id_valid(struct gsi *gsi, enum gsi_reg_id reg_id)14{15 switch (reg_id) {16 case INTER_EE_SRC_CH_IRQ_MSK:17 case INTER_EE_SRC_EV_CH_IRQ_MSK:18 return gsi->version >= IPA_VERSION_3_5;19 20 case HW_PARAM_2:21 return gsi->version >= IPA_VERSION_3_5_1;22 23 case HW_PARAM_4:24 return gsi->version >= IPA_VERSION_5_0;25 26 case CH_C_CNTXT_0:27 case CH_C_CNTXT_1:28 case CH_C_CNTXT_2:29 case CH_C_CNTXT_3:30 case CH_C_QOS:31 case CH_C_SCRATCH_0:32 case CH_C_SCRATCH_1:33 case CH_C_SCRATCH_2:34 case CH_C_SCRATCH_3:35 case EV_CH_E_CNTXT_0:36 case EV_CH_E_CNTXT_1:37 case EV_CH_E_CNTXT_2:38 case EV_CH_E_CNTXT_3:39 case EV_CH_E_CNTXT_4:40 case EV_CH_E_CNTXT_8:41 case EV_CH_E_CNTXT_9:42 case EV_CH_E_CNTXT_10:43 case EV_CH_E_CNTXT_11:44 case EV_CH_E_CNTXT_12:45 case EV_CH_E_CNTXT_13:46 case EV_CH_E_SCRATCH_0:47 case EV_CH_E_SCRATCH_1:48 case CH_C_DOORBELL_0:49 case EV_CH_E_DOORBELL_0:50 case GSI_STATUS:51 case CH_CMD:52 case EV_CH_CMD:53 case GENERIC_CMD:54 case CNTXT_TYPE_IRQ:55 case CNTXT_TYPE_IRQ_MSK:56 case CNTXT_SRC_CH_IRQ:57 case CNTXT_SRC_CH_IRQ_MSK:58 case CNTXT_SRC_CH_IRQ_CLR:59 case CNTXT_SRC_EV_CH_IRQ:60 case CNTXT_SRC_EV_CH_IRQ_MSK:61 case CNTXT_SRC_EV_CH_IRQ_CLR:62 case CNTXT_SRC_IEOB_IRQ:63 case CNTXT_SRC_IEOB_IRQ_MSK:64 case CNTXT_SRC_IEOB_IRQ_CLR:65 case CNTXT_GLOB_IRQ_STTS:66 case CNTXT_GLOB_IRQ_EN:67 case CNTXT_GLOB_IRQ_CLR:68 case CNTXT_GSI_IRQ_STTS:69 case CNTXT_GSI_IRQ_EN:70 case CNTXT_GSI_IRQ_CLR:71 case CNTXT_INTSET:72 case ERROR_LOG:73 case ERROR_LOG_CLR:74 case CNTXT_SCRATCH_0:75 return true;76 77 default:78 return false;79 }80}81 82const struct reg *gsi_reg(struct gsi *gsi, enum gsi_reg_id reg_id)83{84 if (WARN(!gsi_reg_id_valid(gsi, reg_id), "invalid reg %u\n", reg_id))85 return NULL;86 87 return reg(gsi->regs, reg_id);88}89 90static const struct regs *gsi_regs(struct gsi *gsi)91{92 switch (gsi->version) {93 case IPA_VERSION_3_1:94 return &gsi_regs_v3_1;95 96 case IPA_VERSION_3_5_1:97 return &gsi_regs_v3_5_1;98 99 case IPA_VERSION_4_2:100 return &gsi_regs_v4_0;101 102 case IPA_VERSION_4_5:103 case IPA_VERSION_4_7:104 return &gsi_regs_v4_5;105 106 case IPA_VERSION_4_9:107 return &gsi_regs_v4_9;108 109 case IPA_VERSION_4_11:110 return &gsi_regs_v4_11;111 112 case IPA_VERSION_5_0:113 case IPA_VERSION_5_5:114 return &gsi_regs_v5_0;115 116 default:117 return NULL;118 }119}120 121/* Sets gsi->virt and I/O maps the "gsi" memory range for registers */122int gsi_reg_init(struct gsi *gsi, struct platform_device *pdev)123{124 struct device *dev = &pdev->dev;125 struct resource *res;126 resource_size_t size;127 128 /* Get GSI memory range and map it */129 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "gsi");130 if (!res) {131 dev_err(dev, "DT error getting \"gsi\" memory property\n");132 return -ENODEV;133 }134 135 size = resource_size(res);136 if (res->start > U32_MAX || size > U32_MAX - res->start) {137 dev_err(dev, "DT memory resource \"gsi\" out of range\n");138 return -EINVAL;139 }140 141 gsi->regs = gsi_regs(gsi);142 if (!gsi->regs) {143 dev_err(dev, "unsupported IPA version %u (?)\n", gsi->version);144 return -EINVAL;145 }146 147 gsi->virt = ioremap(res->start, size);148 if (!gsi->virt) {149 dev_err(dev, "unable to remap \"gsi\" memory\n");150 return -ENOMEM;151 }152 153 return 0;154}155 156/* Inverse of gsi_reg_init() */157void gsi_reg_exit(struct gsi *gsi)158{159 iounmap(gsi->virt);160 gsi->virt = NULL;161 gsi->regs = NULL;162}163