drivers/misc/ocxl/mmio.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 // Copyright 2019 IBM Corp.
   3 #include <linux/sched/mm.h>
   4 #include "trace.h"
   5 #include "ocxl_internal.h"
   6
   7 int ocxl_global_mmio_read32(struct ocxl_afu *afu, size_t offset,
   8                                 enum ocxl_endian endian, u32 *val)
   9 {
  10         if (offset > afu->config.global_mmio_size - 4)
  11                 return -EINVAL;
  12
  13 #ifdef __BIG_ENDIAN__
  14         if (endian == OCXL_HOST_ENDIAN)
  15                 endian = OCXL_BIG_ENDIAN;
  16 #endif
  17
  18         switch (endian) {
  19         case OCXL_BIG_ENDIAN:
  20                 *val = readl_be((char *)afu->global_mmio_ptr + offset);
  21                 break;
  22
  23         default:
  24                 *val = readl((char *)afu->global_mmio_ptr + offset);
  25                 break;
  26         }
  27
  28         return 0;
  29 }
  30 EXPORT_SYMBOL_GPL(ocxl_global_mmio_read32);
  31
  32 int ocxl_global_mmio_read64(struct ocxl_afu *afu, size_t offset,
  33                                 enum ocxl_endian endian, u64 *val)
  34 {
  35         if (offset > afu->config.global_mmio_size - 8)
  36                 return -EINVAL;
  37
  38 #ifdef __BIG_ENDIAN__
  39         if (endian == OCXL_HOST_ENDIAN)
  40                 endian = OCXL_BIG_ENDIAN;
  41 #endif
  42
  43         switch (endian) {
  44         case OCXL_BIG_ENDIAN:
  45                 *val = readq_be((char *)afu->global_mmio_ptr + offset);
  46                 break;
  47
  48         default:
  49                 *val = readq((char *)afu->global_mmio_ptr + offset);
  50                 break;
  51         }
  52
  53         return 0;
  54 }
  55 EXPORT_SYMBOL_GPL(ocxl_global_mmio_read64);
  56
  57 int ocxl_global_mmio_write32(struct ocxl_afu *afu, size_t offset,
  58                                 enum ocxl_endian endian, u32 val)
  59 {
  60         if (offset > afu->config.global_mmio_size - 4)
  61                 return -EINVAL;
  62
  63 #ifdef __BIG_ENDIAN__
  64         if (endian == OCXL_HOST_ENDIAN)
  65                 endian = OCXL_BIG_ENDIAN;
  66 #endif
  67
  68         switch (endian) {
  69         case OCXL_BIG_ENDIAN:
  70                 writel_be(val, (char *)afu->global_mmio_ptr + offset);
  71                 break;
  72
  73         default:
  74                 writel(val, (char *)afu->global_mmio_ptr + offset);
  75                 break;
  76         }
  77
  78
  79         return 0;
  80 }
  81 EXPORT_SYMBOL_GPL(ocxl_global_mmio_write32);
  82
  83 int ocxl_global_mmio_write64(struct ocxl_afu *afu, size_t offset,
  84                                 enum ocxl_endian endian, u64 val)
  85 {
  86         if (offset > afu->config.global_mmio_size - 8)
  87                 return -EINVAL;
  88
  89 #ifdef __BIG_ENDIAN__
  90         if (endian == OCXL_HOST_ENDIAN)
  91                 endian = OCXL_BIG_ENDIAN;
  92 #endif
  93
  94         switch (endian) {
  95         case OCXL_BIG_ENDIAN:
  96                 writeq_be(val, (char *)afu->global_mmio_ptr + offset);
  97                 break;
  98
  99         default:
 100                 writeq(val, (char *)afu->global_mmio_ptr + offset);
 101                 break;
 102         }
 103
 104
 105         return 0;
 106 }
 107 EXPORT_SYMBOL_GPL(ocxl_global_mmio_write64);
 108
 109 int ocxl_global_mmio_set32(struct ocxl_afu *afu, size_t offset,
 110                                 enum ocxl_endian endian, u32 mask)
 111 {
 112         u32 tmp;
 113
 114         if (offset > afu->config.global_mmio_size - 4)
 115                 return -EINVAL;
 116
 117 #ifdef __BIG_ENDIAN__
 118         if (endian == OCXL_HOST_ENDIAN)
 119                 endian = OCXL_BIG_ENDIAN;
 120 #endif
 121
 122         switch (endian) {
 123         case OCXL_BIG_ENDIAN:
 124                 tmp = readl_be((char *)afu->global_mmio_ptr + offset);
 125                 tmp |= mask;
 126                 writel_be(tmp, (char *)afu->global_mmio_ptr + offset);
 127                 break;
 128
 129         default:
 130                 tmp = readl((char *)afu->global_mmio_ptr + offset);
 131                 tmp |= mask;
 132                 writel(tmp, (char *)afu->global_mmio_ptr + offset);
 133                 break;
 134         }
 135
 136         return 0;
 137 }
 138 EXPORT_SYMBOL_GPL(ocxl_global_mmio_set32);
 139
 140 int ocxl_global_mmio_set64(struct ocxl_afu *afu, size_t offset,
 141                                 enum ocxl_endian endian, u64 mask)
 142 {
 143         u64 tmp;
 144
 145         if (offset > afu->config.global_mmio_size - 8)
 146                 return -EINVAL;
 147
 148 #ifdef __BIG_ENDIAN__
 149         if (endian == OCXL_HOST_ENDIAN)
 150                 endian = OCXL_BIG_ENDIAN;
 151 #endif
 152
 153         switch (endian) {
 154         case OCXL_BIG_ENDIAN:
 155                 tmp = readq_be((char *)afu->global_mmio_ptr + offset);
 156                 tmp |= mask;
 157                 writeq_be(tmp, (char *)afu->global_mmio_ptr + offset);
 158                 break;
 159
 160         default:
 161                 tmp = readq((char *)afu->global_mmio_ptr + offset);
 162                 tmp |= mask;
 163                 writeq(tmp, (char *)afu->global_mmio_ptr + offset);
 164                 break;
 165         }
 166
 167         return 0;
 168 }
 169 EXPORT_SYMBOL_GPL(ocxl_global_mmio_set64);
 170
 171 int ocxl_global_mmio_clear32(struct ocxl_afu *afu, size_t offset,
 172                                 enum ocxl_endian endian, u32 mask)
 173 {
 174         u32 tmp;
 175
 176         if (offset > afu->config.global_mmio_size - 4)
 177                 return -EINVAL;
 178
 179 #ifdef __BIG_ENDIAN__
 180         if (endian == OCXL_HOST_ENDIAN)
 181                 endian = OCXL_BIG_ENDIAN;
 182 #endif
 183
 184         switch (endian) {
 185         case OCXL_BIG_ENDIAN:
 186                 tmp = readl_be((char *)afu->global_mmio_ptr + offset);
 187                 tmp &= ~mask;
 188                 writel_be(tmp, (char *)afu->global_mmio_ptr + offset);
 189                 break;
 190
 191         default:
 192                 tmp = readl((char *)afu->global_mmio_ptr + offset);
 193                 tmp &= ~mask;
 194                 writel(tmp, (char *)afu->global_mmio_ptr + offset);
 195                 break;
 196         }
 197
 198
 199         return 0;
 200 }
 201 EXPORT_SYMBOL_GPL(ocxl_global_mmio_clear32);
 202
 203 int ocxl_global_mmio_clear64(struct ocxl_afu *afu, size_t offset,
 204                                 enum ocxl_endian endian, u64 mask)
 205 {
 206         u64 tmp;
 207
 208         if (offset > afu->config.global_mmio_size - 8)
 209                 return -EINVAL;
 210
 211 #ifdef __BIG_ENDIAN__
 212         if (endian == OCXL_HOST_ENDIAN)
 213                 endian = OCXL_BIG_ENDIAN;
 214 #endif
 215
 216         switch (endian) {
 217         case OCXL_BIG_ENDIAN:
 218                 tmp = readq_be((char *)afu->global_mmio_ptr + offset);
 219                 tmp &= ~mask;
 220                 writeq_be(tmp, (char *)afu->global_mmio_ptr + offset);
 221                 break;
 222
 223         default:
 224                 tmp = readq((char *)afu->global_mmio_ptr + offset);
 225                 tmp &= ~mask;
 226                 writeq(tmp, (char *)afu->global_mmio_ptr + offset);
 227                 break;
 228         }
 229
 230         writeq(tmp, (char *)afu->global_mmio_ptr + offset);
 231
 232         return 0;
 233 }
 234 EXPORT_SYMBOL_GPL(ocxl_global_mmio_clear64);