uboot/test/overlay/cmd_ut_overlay.c
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   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * Copyright (c) 2016 NextThing Co
   4 * Copyright (c) 2016 Free Electrons
   5 */
   6
   7#include <common.h>
   8#include <command.h>
   9#include <errno.h>
  10#include <fdt_support.h>
  11#include <malloc.h>
  12
  13#include <linux/sizes.h>
  14
  15#include <test/ut.h>
  16#include <test/overlay.h>
  17#include <test/suites.h>
  18
  19/* 4k ought to be enough for anybody */
  20#define FDT_COPY_SIZE   (4 * SZ_1K)
  21
  22extern u32 __dtb_test_fdt_base_begin;
  23extern u32 __dtb_test_fdt_overlay_begin;
  24extern u32 __dtb_test_fdt_overlay_stacked_begin;
  25
  26static int ut_fdt_getprop_u32_by_index(void *fdt, const char *path,
  27                                    const char *name, int index,
  28                                    u32 *out)
  29{
  30        const fdt32_t *val;
  31        int node_off;
  32        int len;
  33
  34        node_off = fdt_path_offset(fdt, path);
  35        if (node_off < 0)
  36                return node_off;
  37
  38        val = fdt_getprop(fdt, node_off, name, &len);
  39        if (!val || (len < (sizeof(uint32_t) * (index + 1))))
  40                return -FDT_ERR_NOTFOUND;
  41
  42        *out = fdt32_to_cpu(*(val + index));
  43
  44        return 0;
  45}
  46
  47static int ut_fdt_getprop_u32(void *fdt, const char *path, const char *name,
  48                           u32 *out)
  49{
  50        return ut_fdt_getprop_u32_by_index(fdt, path, name, 0, out);
  51}
  52
  53static int fdt_getprop_str(void *fdt, const char *path, const char *name,
  54                           const char **out)
  55{
  56        int node_off;
  57        int len;
  58
  59        node_off = fdt_path_offset(fdt, path);
  60        if (node_off < 0)
  61                return node_off;
  62
  63        *out = fdt_stringlist_get(fdt, node_off, name, 0, &len);
  64
  65        return len < 0 ? len : 0;
  66}
  67
  68static int fdt_overlay_change_int_property(struct unit_test_state *uts)
  69{
  70        void *fdt = uts->priv;
  71        u32 val = 0;
  72
  73        ut_assertok(ut_fdt_getprop_u32(fdt, "/test-node", "test-int-property",
  74                                    &val));
  75        ut_asserteq(43, val);
  76
  77        return CMD_RET_SUCCESS;
  78}
  79OVERLAY_TEST(fdt_overlay_change_int_property, 0);
  80
  81static int fdt_overlay_change_str_property(struct unit_test_state *uts)
  82{
  83        void *fdt = uts->priv;
  84        const char *val = NULL;
  85
  86        ut_assertok(fdt_getprop_str(fdt, "/test-node", "test-str-property",
  87                                    &val));
  88        ut_asserteq_str("foobar", val);
  89
  90        return CMD_RET_SUCCESS;
  91}
  92OVERLAY_TEST(fdt_overlay_change_str_property, 0);
  93
  94static int fdt_overlay_add_str_property(struct unit_test_state *uts)
  95{
  96        void *fdt = uts->priv;
  97        const char *val = NULL;
  98
  99        ut_assertok(fdt_getprop_str(fdt, "/test-node", "test-str-property-2",
 100                                    &val));
 101        ut_asserteq_str("foobar2", val);
 102
 103        return CMD_RET_SUCCESS;
 104}
 105OVERLAY_TEST(fdt_overlay_add_str_property, 0);
 106
 107static int fdt_overlay_add_node_by_phandle(struct unit_test_state *uts)
 108{
 109        void *fdt = uts->priv;
 110        int off;
 111
 112        off = fdt_path_offset(fdt, "/test-node/new-node");
 113        ut_assert(off >= 0);
 114
 115        ut_assertnonnull(fdt_getprop(fdt, off, "new-property", NULL));
 116
 117        return CMD_RET_SUCCESS;
 118}
 119OVERLAY_TEST(fdt_overlay_add_node_by_phandle, 0);
 120
 121static int fdt_overlay_add_node_by_path(struct unit_test_state *uts)
 122{
 123        void *fdt = uts->priv;
 124        int off;
 125
 126        off = fdt_path_offset(fdt, "/new-node");
 127        ut_assert(off >= 0);
 128
 129        ut_assertnonnull(fdt_getprop(fdt, off, "new-property", NULL));
 130
 131        return CMD_RET_SUCCESS;
 132}
 133OVERLAY_TEST(fdt_overlay_add_node_by_path, 0);
 134
 135static int fdt_overlay_add_subnode_property(struct unit_test_state *uts)
 136{
 137        void *fdt = uts->priv;
 138        int off;
 139
 140        off = fdt_path_offset(fdt, "/test-node/sub-test-node");
 141        ut_assert(off >= 0);
 142
 143        ut_assertnonnull(fdt_getprop(fdt, off, "sub-test-property", NULL));
 144        ut_assertnonnull(fdt_getprop(fdt, off, "new-sub-test-property", NULL));
 145
 146        return CMD_RET_SUCCESS;
 147}
 148OVERLAY_TEST(fdt_overlay_add_subnode_property, 0);
 149
 150static int fdt_overlay_local_phandle(struct unit_test_state *uts)
 151{
 152        uint32_t local_phandle;
 153        void *fdt = uts->priv;
 154        u32 val = 0;
 155        int off;
 156
 157        off = fdt_path_offset(fdt, "/new-local-node");
 158        ut_assert(off >= 0);
 159
 160        local_phandle = fdt_get_phandle(fdt, off);
 161        ut_assert(local_phandle);
 162
 163        ut_assertok(ut_fdt_getprop_u32_by_index(fdt, "/", "test-several-phandle",
 164                                             0, &val));
 165        ut_asserteq(local_phandle, val);
 166
 167        ut_assertok(ut_fdt_getprop_u32_by_index(fdt, "/", "test-several-phandle",
 168                                             1, &val));
 169        ut_asserteq(local_phandle, val);
 170
 171        return CMD_RET_SUCCESS;
 172}
 173OVERLAY_TEST(fdt_overlay_local_phandle, 0);
 174
 175static int fdt_overlay_local_phandles(struct unit_test_state *uts)
 176{
 177        uint32_t local_phandle, test_phandle;
 178        void *fdt = uts->priv;
 179        u32 val = 0;
 180        int off;
 181
 182        off = fdt_path_offset(fdt, "/new-local-node");
 183        ut_assert(off >= 0);
 184
 185        local_phandle = fdt_get_phandle(fdt, off);
 186        ut_assert(local_phandle);
 187
 188        off = fdt_path_offset(fdt, "/test-node");
 189        ut_assert(off >= 0);
 190
 191        test_phandle = fdt_get_phandle(fdt, off);
 192        ut_assert(test_phandle);
 193
 194        ut_assertok(ut_fdt_getprop_u32_by_index(fdt, "/", "test-phandle", 0,
 195                                             &val));
 196        ut_asserteq(test_phandle, val);
 197
 198        ut_assertok(ut_fdt_getprop_u32_by_index(fdt, "/", "test-phandle", 1,
 199                                             &val));
 200        ut_asserteq(local_phandle, val);
 201
 202        return CMD_RET_SUCCESS;
 203}
 204OVERLAY_TEST(fdt_overlay_local_phandles, 0);
 205
 206static int fdt_overlay_stacked(struct unit_test_state *uts)
 207{
 208        void *fdt = uts->priv;
 209        u32 val = 0;
 210
 211        ut_assertok(ut_fdt_getprop_u32(fdt, "/new-local-node",
 212                                       "stacked-test-int-property", &val));
 213        ut_asserteq(43, val);
 214
 215        return CMD_RET_SUCCESS;
 216}
 217OVERLAY_TEST(fdt_overlay_stacked, 0);
 218
 219int do_ut_overlay(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 220{
 221        struct unit_test *tests = ll_entry_start(struct unit_test,
 222                                                 overlay_test);
 223        const int n_ents = ll_entry_count(struct unit_test, overlay_test);
 224        struct unit_test_state *uts;
 225        void *fdt_base = &__dtb_test_fdt_base_begin;
 226        void *fdt_overlay = &__dtb_test_fdt_overlay_begin;
 227        void *fdt_overlay_stacked = &__dtb_test_fdt_overlay_stacked_begin;
 228        void *fdt_base_copy, *fdt_overlay_copy, *fdt_overlay_stacked_copy;
 229        int ret = -ENOMEM;
 230
 231        uts = calloc(1, sizeof(*uts));
 232        if (!uts)
 233                return -ENOMEM;
 234
 235        ut_assertok(fdt_check_header(fdt_base));
 236        ut_assertok(fdt_check_header(fdt_overlay));
 237
 238        fdt_base_copy = malloc(FDT_COPY_SIZE);
 239        if (!fdt_base_copy)
 240                goto err1;
 241        uts->priv = fdt_base_copy;
 242
 243        fdt_overlay_copy = malloc(FDT_COPY_SIZE);
 244        if (!fdt_overlay_copy)
 245                goto err2;
 246
 247        fdt_overlay_stacked_copy = malloc(FDT_COPY_SIZE);
 248        if (!fdt_overlay_stacked_copy)
 249                goto err3;
 250
 251        /*
 252         * Resize the FDT to 4k so that we have room to operate on
 253         *
 254         * (and relocate it since the memory might be mapped
 255         * read-only)
 256         */
 257        ut_assertok(fdt_open_into(fdt_base, fdt_base_copy, FDT_COPY_SIZE));
 258
 259        /*
 260         * Resize the overlay to 4k so that we have room to operate on
 261         *
 262         * (and relocate it since the memory might be mapped
 263         * read-only)
 264         */
 265        ut_assertok(fdt_open_into(fdt_overlay, fdt_overlay_copy,
 266                                  FDT_COPY_SIZE));
 267
 268        /*
 269         * Resize the stacked overlay to 4k so that we have room to operate on
 270         *
 271         * (and relocate it since the memory might be mapped
 272         * read-only)
 273         */
 274        ut_assertok(fdt_open_into(fdt_overlay_stacked, fdt_overlay_stacked_copy,
 275                                  FDT_COPY_SIZE));
 276
 277        /* Apply the overlay */
 278        ut_assertok(fdt_overlay_apply(fdt_base_copy, fdt_overlay_copy));
 279
 280        /* Apply the stacked overlay */
 281        ut_assertok(fdt_overlay_apply(fdt_base_copy, fdt_overlay_stacked_copy));
 282
 283        ret = cmd_ut_category("overlay", tests, n_ents, argc, argv);
 284
 285        free(fdt_overlay_stacked_copy);
 286err3:
 287        free(fdt_overlay_copy);
 288err2:
 289        free(fdt_base_copy);
 290err1:
 291        free(uts);
 292
 293        return ret;
 294}
 295