diff options
Diffstat (limited to '')
22 files changed, 562 insertions, 388 deletions
diff --git a/drivers/of/Kconfig b/drivers/of/Kconfig index 783e0870bd22..ad3fcad4d75b 100644 --- a/drivers/of/Kconfig +++ b/drivers/of/Kconfig @@ -92,6 +92,7 @@ config OF_RESOLVE config OF_OVERLAY bool "Device Tree overlays" select OF_DYNAMIC + select OF_FLATTREE select OF_RESOLVE help Overlays are a method to dynamically modify part of the kernel's diff --git a/drivers/of/overlay.c b/drivers/of/overlay.c index 3397d7642958..e3d7f69a8333 100644 --- a/drivers/of/overlay.c +++ b/drivers/of/overlay.c @@ -12,10 +12,12 @@ #include <linux/module.h> #include <linux/of.h> #include <linux/of_device.h> +#include <linux/of_fdt.h> #include <linux/string.h> #include <linux/ctype.h> #include <linux/errno.h> #include <linux/slab.h> +#include <linux/libfdt.h> #include <linux/err.h> #include <linux/idr.h> @@ -33,7 +35,9 @@ struct fragment { /** * struct overlay_changeset + * @id: changeset identifier * @ovcs_list: list on which we are located + * @fdt: FDT that was unflattened to create @overlay_tree * @overlay_tree: expanded device tree that contains the fragment nodes * @count: count of fragment structures * @fragments: fragment nodes in the overlay expanded device tree @@ -43,6 +47,7 @@ struct fragment { struct overlay_changeset { int id; struct list_head ovcs_list; + const void *fdt; struct device_node *overlay_tree; int count; struct fragment *fragments; @@ -503,7 +508,8 @@ static struct device_node *find_target_node(struct device_node *info_node) /** * init_overlay_changeset() - initialize overlay changeset from overlay tree - * @ovcs Overlay changeset to build + * @ovcs: Overlay changeset to build + * @fdt: the FDT that was unflattened to create @tree * @tree: Contains all the overlay fragments and overlay fixup nodes * * Initialize @ovcs. Populate @ovcs->fragments with node information from @@ -514,7 +520,7 @@ static struct device_node *find_target_node(struct device_node *info_node) * detected in @tree, or -ENOSPC if idr_alloc() error. */ static int init_overlay_changeset(struct overlay_changeset *ovcs, - struct device_node *tree) + const void *fdt, struct device_node *tree) { struct device_node *node, *overlay_node; struct fragment *fragment; @@ -535,6 +541,7 @@ static int init_overlay_changeset(struct overlay_changeset *ovcs, pr_debug("%s() tree is not root\n", __func__); ovcs->overlay_tree = tree; + ovcs->fdt = fdt; INIT_LIST_HEAD(&ovcs->ovcs_list); @@ -606,6 +613,7 @@ static int init_overlay_changeset(struct overlay_changeset *ovcs, } if (!cnt) { + pr_err("no fragments or symbols in overlay\n"); ret = -EINVAL; goto err_free_fragments; } @@ -642,11 +650,24 @@ static void free_overlay_changeset(struct overlay_changeset *ovcs) } kfree(ovcs->fragments); + /* + * TODO + * + * would like to: kfree(ovcs->overlay_tree); + * but can not since drivers may have pointers into this data + * + * would like to: kfree(ovcs->fdt); + * but can not since drivers may have pointers into this data + */ + kfree(ovcs); } -/** +/* + * internal documentation + * * of_overlay_apply() - Create and apply an overlay changeset + * @fdt: the FDT that was unflattened to create @tree * @tree: Expanded overlay device tree * @ovcs_id: Pointer to overlay changeset id * @@ -685,21 +706,29 @@ static void free_overlay_changeset(struct overlay_changeset *ovcs) * id is returned to *ovcs_id. */ -int of_overlay_apply(struct device_node *tree, int *ovcs_id) +static int of_overlay_apply(const void *fdt, struct device_node *tree, + int *ovcs_id) { struct overlay_changeset *ovcs; int ret = 0, ret_revert, ret_tmp; - *ovcs_id = 0; + /* + * As of this point, fdt and tree belong to the overlay changeset. + * overlay changeset code is responsible for freeing them. + */ if (devicetree_corrupt()) { pr_err("devicetree state suspect, refuse to apply overlay\n"); + kfree(fdt); + kfree(tree); ret = -EBUSY; goto out; } ovcs = kzalloc(sizeof(*ovcs), GFP_KERNEL); if (!ovcs) { + kfree(fdt); + kfree(tree); ret = -ENOMEM; goto out; } @@ -709,12 +738,17 @@ int of_overlay_apply(struct device_node *tree, int *ovcs_id) ret = of_resolve_phandles(tree); if (ret) - goto err_free_overlay_changeset; + goto err_free_tree; - ret = init_overlay_changeset(ovcs, tree); + ret = init_overlay_changeset(ovcs, fdt, tree); if (ret) - goto err_free_overlay_changeset; + goto err_free_tree; + /* + * after overlay_notify(), ovcs->overlay_tree related pointers may have + * leaked to drivers, so can not kfree() tree, aka ovcs->overlay_tree; + * and can not free fdt, aka ovcs->fdt + */ ret = overlay_notify(ovcs, OF_OVERLAY_PRE_APPLY); if (ret) { pr_err("overlay changeset pre-apply notify error %d\n", ret); @@ -754,6 +788,10 @@ int of_overlay_apply(struct device_node *tree, int *ovcs_id) goto out_unlock; +err_free_tree: + kfree(fdt); + kfree(tree); + err_free_overlay_changeset: free_overlay_changeset(ovcs); @@ -766,7 +804,63 @@ out: return ret; } -EXPORT_SYMBOL_GPL(of_overlay_apply); + +int of_overlay_fdt_apply(const void *overlay_fdt, u32 overlay_fdt_size, + int *ovcs_id) +{ + const void *new_fdt; + int ret; + u32 size; + struct device_node *overlay_root; + + *ovcs_id = 0; + ret = 0; + + if (overlay_fdt_size < sizeof(struct fdt_header) || + fdt_check_header(overlay_fdt)) { + pr_err("Invalid overlay_fdt header\n"); + return -EINVAL; + } + + size = fdt_totalsize(overlay_fdt); + if (overlay_fdt_size < size) + return -EINVAL; + + /* + * Must create permanent copy of FDT because of_fdt_unflatten_tree() + * will create pointers to the passed in FDT in the unflattened tree. + */ + new_fdt = kmemdup(overlay_fdt, size, GFP_KERNEL); + if (!new_fdt) + return -ENOMEM; + + of_fdt_unflatten_tree(new_fdt, NULL, &overlay_root); + if (!overlay_root) { + pr_err("unable to unflatten overlay_fdt\n"); + ret = -EINVAL; + goto out_free_new_fdt; + } + + ret = of_overlay_apply(new_fdt, overlay_root, ovcs_id); + if (ret < 0) { + /* + * new_fdt and overlay_root now belong to the overlay + * changeset. + * overlay changeset code is responsible for freeing them. + */ + goto out; + } + + return 0; + + +out_free_new_fdt: + kfree(new_fdt); + +out: + return ret; +} +EXPORT_SYMBOL_GPL(of_overlay_fdt_apply); /* * Find @np in @tree. diff --git a/drivers/of/resolver.c b/drivers/of/resolver.c index 740d19bde601..b2f645187213 100644 --- a/drivers/of/resolver.c +++ b/drivers/of/resolver.c @@ -269,17 +269,11 @@ int of_resolve_phandles(struct device_node *overlay) goto out; } -#if 0 - Temporarily disable check so that old style overlay unittests - do not fail when of_resolve_phandles() is moved into - of_overlay_apply(). - if (!of_node_check_flag(overlay, OF_DETACHED)) { pr_err("overlay not detached\n"); err = -EINVAL; goto out; } -#endif phandle_delta = live_tree_max_phandle() + 1; adjust_overlay_phandles(overlay, phandle_delta); diff --git a/drivers/of/unittest-data/Makefile b/drivers/of/unittest-data/Makefile index df697976740a..8fd0ea4b92b0 100644 --- a/drivers/of/unittest-data/Makefile +++ b/drivers/of/unittest-data/Makefile @@ -1,8 +1,22 @@ # SPDX-License-Identifier: GPL-2.0 -DTC_FLAGS_testcases := -Wno-interrupts_property obj-y += testcases.dtb.o obj-$(CONFIG_OF_OVERLAY) += overlay.dtb.o \ + overlay_0.dtb.o \ + overlay_1.dtb.o \ + overlay_2.dtb.o \ + overlay_3.dtb.o \ + overlay_4.dtb.o \ + overlay_5.dtb.o \ + overlay_6.dtb.o \ + overlay_7.dtb.o \ + overlay_8.dtb.o \ + overlay_9.dtb.o \ + overlay_10.dtb.o \ + overlay_11.dtb.o \ + overlay_12.dtb.o \ + overlay_13.dtb.o \ + overlay_15.dtb.o \ overlay_bad_phandle.dtb.o \ overlay_bad_symbol.dtb.o \ overlay_base.dtb.o @@ -10,10 +24,14 @@ obj-$(CONFIG_OF_OVERLAY) += overlay.dtb.o \ targets += $(foreach suffix, dtb dtb.S, $(patsubst %.dtb.o,%.$(suffix),$(obj-y))) # enable creation of __symbols__ node -DTC_FLAGS_overlay := -@ -DTC_FLAGS_overlay_bad_phandle := -@ -DTC_FLAGS_overlay_bad_symbol := -@ -DTC_FLAGS_overlay_base := -@ +DTC_FLAGS_overlay += -@ +DTC_FLAGS_overlay_bad_phandle += -@ +DTC_FLAGS_overlay_bad_symbol += -@ +DTC_FLAGS_overlay_base += -@ +DTC_FLAGS_testcases += -@ + +# suppress warnings about intentional errors +DTC_FLAGS_testcases += -Wno-interrupts_property .PRECIOUS: \ $(obj)/%.dtb.S \ diff --git a/drivers/of/unittest-data/overlay_0.dts b/drivers/of/unittest-data/overlay_0.dts new file mode 100644 index 000000000000..ac0f9e0fe65f --- /dev/null +++ b/drivers/of/unittest-data/overlay_0.dts @@ -0,0 +1,14 @@ +// SPDX-License-Identifier: GPL-2.0 +/dts-v1/; +/plugin/; + +/ { + /* overlay_0 - enable using absolute target path */ + + fragment@0 { + target-path = "/testcase-data/overlay-node/test-bus/test-unittest0"; + __overlay__ { + status = "okay"; + }; + }; +}; diff --git a/drivers/of/unittest-data/overlay_1.dts b/drivers/of/unittest-data/overlay_1.dts new file mode 100644 index 000000000000..e92a626e2948 --- /dev/null +++ b/drivers/of/unittest-data/overlay_1.dts @@ -0,0 +1,14 @@ +// SPDX-License-Identifier: GPL-2.0 +/dts-v1/; +/plugin/; + +/ { + /* overlay_1 - disable using absolute target path */ + + fragment@0 { + target-path = "/testcase-data/overlay-node/test-bus/test-unittest1"; + __overlay__ { + status = "disabled"; + }; + }; +}; diff --git a/drivers/of/unittest-data/overlay_10.dts b/drivers/of/unittest-data/overlay_10.dts new file mode 100644 index 000000000000..445925a10cd3 --- /dev/null +++ b/drivers/of/unittest-data/overlay_10.dts @@ -0,0 +1,34 @@ +// SPDX-License-Identifier: GPL-2.0 +/dts-v1/; +/plugin/; + +/ { + /* overlay_10 */ + /* overlays 8, 9, 10, 11 application and removal in bad sequence */ + + fragment@0 { + target-path = "/testcase-data/overlay-node/test-bus"; + __overlay__ { + + /* suppress DTC warning */ + #address-cells = <1>; + #size-cells = <0>; + + test-unittest10 { + compatible = "unittest"; + status = "okay"; + reg = <10>; + + #address-cells = <1>; + #size-cells = <0>; + + test-unittest101 { + compatible = "unittest"; + status = "okay"; + reg = <1>; + }; + + }; + }; + }; +}; diff --git a/drivers/of/unittest-data/overlay_11.dts b/drivers/of/unittest-data/overlay_11.dts new file mode 100644 index 000000000000..c1d14f34359e --- /dev/null +++ b/drivers/of/unittest-data/overlay_11.dts @@ -0,0 +1,34 @@ +// SPDX-License-Identifier: GPL-2.0 +/dts-v1/; +/plugin/; + +/ { + /* overlay_11 */ + /* overlays 8, 9, 10, 11 application and removal in bad sequence */ + + fragment@0 { + target-path = "/testcase-data/overlay-node/test-bus"; + __overlay__ { + + /* suppress DTC warning */ + #address-cells = <1>; + #size-cells = <0>; + + test-unittest11 { + compatible = "unittest"; + status = "okay"; + reg = <11>; + + #address-cells = <1>; + #size-cells = <0>; + + test-unittest111 { + compatible = "unittest"; + status = "okay"; + reg = <1>; + }; + + }; + }; + }; +}; diff --git a/drivers/of/unittest-data/overlay_12.dts b/drivers/of/unittest-data/overlay_12.dts new file mode 100644 index 000000000000..ca3441e2cbec --- /dev/null +++ b/drivers/of/unittest-data/overlay_12.dts @@ -0,0 +1,14 @@ +// SPDX-License-Identifier: GPL-2.0 +/dts-v1/; +/plugin/; + +/ { + /* overlay_12 - enable using absolute target path (i2c) */ + + fragment@0 { + target-path = "/testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest12"; + __overlay__ { + status = "okay"; + }; + }; +}; diff --git a/drivers/of/unittest-data/overlay_13.dts b/drivers/of/unittest-data/overlay_13.dts new file mode 100644 index 000000000000..3c30dec63894 --- /dev/null +++ b/drivers/of/unittest-data/overlay_13.dts @@ -0,0 +1,14 @@ +// SPDX-License-Identifier: GPL-2.0 +/dts-v1/; +/plugin/; + +/ { + /* overlay_13 - disable using absolute target path (i2c) */ + + fragment@0 { + target-path = "/testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest13"; + __overlay__ { + status = "disabled"; + }; + }; +}; diff --git a/drivers/of/unittest-data/overlay_15.dts b/drivers/of/unittest-data/overlay_15.dts new file mode 100644 index 000000000000..44e44c62b739 --- /dev/null +++ b/drivers/of/unittest-data/overlay_15.dts @@ -0,0 +1,35 @@ +// SPDX-License-Identifier: GPL-2.0 +/dts-v1/; +/plugin/; + +/ { + /* overlay_15 - mux overlay */ + + fragment@0 { + target-path = "/testcase-data/overlay-node/test-bus/i2c-test-bus"; + __overlay__ { + #address-cells = <1>; + #size-cells = <0>; + test-unittest15 { + reg = <11>; + compatible = "unittest-i2c-mux"; + status = "okay"; + + #address-cells = <1>; + #size-cells = <0>; + + i2c@0 { + #address-cells = <1>; + #size-cells = <0>; + reg = <0>; + + test-mux-dev { + reg = <32>; + compatible = "unittest-i2c-dev"; + status = "okay"; + }; + }; + }; + }; + }; +}; diff --git a/drivers/of/unittest-data/overlay_2.dts b/drivers/of/unittest-data/overlay_2.dts new file mode 100644 index 000000000000..cf1e4245b7ce --- /dev/null +++ b/drivers/of/unittest-data/overlay_2.dts @@ -0,0 +1,14 @@ +// SPDX-License-Identifier: GPL-2.0 +/dts-v1/; +/plugin/; + +/ { + /* overlay_2 - enable using label */ + + fragment@0 { + target = <&unittest2>; + __overlay__ { + status = "okay"; + }; + }; +}; diff --git a/drivers/of/unittest-data/overlay_3.dts b/drivers/of/unittest-data/overlay_3.dts new file mode 100644 index 000000000000..158dc44fc20a --- /dev/null +++ b/drivers/of/unittest-data/overlay_3.dts @@ -0,0 +1,14 @@ +// SPDX-License-Identifier: GPL-2.0 +/dts-v1/; +/plugin/; + +/ { + /* overlay_3 - disable using label */ + + fragment@0 { + target = <&unittest3>; + __overlay__ { + status = "disabled"; + }; + }; +}; diff --git a/drivers/of/unittest-data/overlay_4.dts b/drivers/of/unittest-data/overlay_4.dts new file mode 100644 index 000000000000..b4a2e6c6b016 --- /dev/null +++ b/drivers/of/unittest-data/overlay_4.dts @@ -0,0 +1,23 @@ +// SPDX-License-Identifier: GPL-2.0 +/dts-v1/; +/plugin/; + +/ { + /* overlay_4 - test insertion of a full node */ + + fragment@0 { + target = <&unittestbus>; + __overlay__ { + + /* suppress DTC warning */ + #address-cells = <1>; + #size-cells = <0>; + + test-unittest4 { + compatible = "unittest"; + status = "okay"; + reg = <4>; + }; + }; + }; +}; diff --git a/drivers/of/unittest-data/overlay_5.dts b/drivers/of/unittest-data/overlay_5.dts new file mode 100644 index 000000000000..02ad25c1f19c --- /dev/null +++ b/drivers/of/unittest-data/overlay_5.dts @@ -0,0 +1,14 @@ +// SPDX-License-Identifier: GPL-2.0 +/dts-v1/; +/plugin/; + +/ { + /* overlay_5 - test overlay apply revert */ + + fragment@0 { + target-path = "/testcase-data/overlay-node/test-bus/test-unittest5"; + __overlay__ { + status = "okay"; + }; + }; +}; diff --git a/drivers/of/unittest-data/overlay_6.dts b/drivers/of/unittest-data/overlay_6.dts new file mode 100644 index 000000000000..a14e965f5497 --- /dev/null +++ b/drivers/of/unittest-data/overlay_6.dts @@ -0,0 +1,15 @@ +// SPDX-License-Identifier: GPL-2.0 +/dts-v1/; +/plugin/; + +/ { + /* overlay_6 */ + /* overlays 6, 7 application and removal in sequence */ + + fragment@0 { + target-path = "/testcase-data/overlay-node/test-bus/test-unittest6"; + __overlay__ { + status = "okay"; + }; + }; +}; diff --git a/drivers/of/unittest-data/overlay_7.dts b/drivers/of/unittest-data/overlay_7.dts new file mode 100644 index 000000000000..4bd7e423209c --- /dev/null +++ b/drivers/of/unittest-data/overlay_7.dts @@ -0,0 +1,15 @@ +// SPDX-License-Identifier: GPL-2.0 +/dts-v1/; +/plugin/; + +/ { + /* overlay_7 */ + /* overlays 6, 7 application and removal in sequence */ + + fragment@0 { + target-path = "/testcase-data/overlay-node/test-bus/test-unittest7"; + __overlay__ { + status = "okay"; + }; + }; +}; diff --git a/drivers/of/unittest-data/overlay_8.dts b/drivers/of/unittest-data/overlay_8.dts new file mode 100644 index 000000000000..5b21c53945a9 --- /dev/null +++ b/drivers/of/unittest-data/overlay_8.dts @@ -0,0 +1,15 @@ +// SPDX-License-Identifier: GPL-2.0 +/dts-v1/; +/plugin/; + +/ { + /* overlay_8 */ + /* overlays 8, 9, 10, 11 application and removal in bad sequence */ + + fragment@0 { + target-path = "/testcase-data/overlay-node/test-bus/test-unittest8"; + __overlay__ { + status = "okay"; + }; + }; +}; diff --git a/drivers/of/unittest-data/overlay_9.dts b/drivers/of/unittest-data/overlay_9.dts new file mode 100644 index 000000000000..20ff055a5349 --- /dev/null +++ b/drivers/of/unittest-data/overlay_9.dts @@ -0,0 +1,15 @@ +// SPDX-License-Identifier: GPL-2.0 +/dts-v1/; +/plugin/; + +/ { + /* overlay_9 */ + /* overlays 8, 9, 10, 11 application and removal in bad sequence */ + + fragment@0 { + target-path = "/testcase-data/overlay-node/test-bus/test-unittest8"; + __overlay__ { + property-foo = "bar"; + }; + }; +}; diff --git a/drivers/of/unittest-data/tests-overlay.dtsi b/drivers/of/unittest-data/tests-overlay.dtsi index 7b8001ab9f3a..fa2fb43bccac 100644 --- a/drivers/of/unittest-data/tests-overlay.dtsi +++ b/drivers/of/unittest-data/tests-overlay.dtsi @@ -113,218 +113,5 @@ }; }; }; - - /* test enable using absolute target path */ - overlay0 { - fragment@0 { - target-path = "/testcase-data/overlay-node/test-bus/test-unittest0"; - __overlay__ { - status = "okay"; - }; - }; - }; - - /* test disable using absolute target path */ - overlay1 { - fragment@0 { - target-path = "/testcase-data/overlay-node/test-bus/test-unittest1"; - __overlay__ { - status = "disabled"; - }; - }; - }; - - /* test enable using label */ - overlay2 { - fragment@0 { - target = <&unittest2>; - __overlay__ { - status = "okay"; - }; - }; - }; - - /* test disable using label */ - overlay3 { - fragment@0 { - target = <&unittest3>; - __overlay__ { - status = "disabled"; - }; - }; - }; - - /* test insertion of a full node */ - overlay4 { - fragment@0 { - target = <&unittestbus>; - __overlay__ { - - /* suppress DTC warning */ - #address-cells = <1>; - #size-cells = <0>; - - test-unittest4 { - compatible = "unittest"; - status = "okay"; - reg = <4>; - }; - }; - }; - }; - - /* test overlay apply revert */ - overlay5 { - fragment@0 { - target-path = "/testcase-data/overlay-node/test-bus/test-unittest5"; - __overlay__ { - status = "okay"; - }; - }; - }; - - /* test overlays application and removal in sequence */ - overlay6 { - fragment@0 { - target-path = "/testcase-data/overlay-node/test-bus/test-unittest6"; - __overlay__ { - status = "okay"; - }; - }; - }; - overlay7 { - fragment@0 { - target-path = "/testcase-data/overlay-node/test-bus/test-unittest7"; - __overlay__ { - status = "okay"; - }; - }; - }; - - /* test overlays application and removal in bad sequence */ - overlay8 { - fragment@0 { - target-path = "/testcase-data/overlay-node/test-bus/test-unittest8"; - __overlay__ { - status = "okay"; - }; - }; - }; - overlay9 { - fragment@0 { - target-path = "/testcase-data/overlay-node/test-bus/test-unittest8"; - __overlay__ { - property-foo = "bar"; - }; - }; - }; - - overlay10 { - fragment@0 { - target-path = "/testcase-data/overlay-node/test-bus"; - __overlay__ { - - /* suppress DTC warning */ - #address-cells = <1>; - #size-cells = <0>; - - test-unittest10 { - compatible = "unittest"; - status = "okay"; - reg = <10>; - - #address-cells = <1>; - #size-cells = <0>; - - test-unittest101 { - compatible = "unittest"; - status = "okay"; - reg = <1>; - }; - - }; - }; - }; - }; - - overlay11 { - fragment@0 { - target-path = "/testcase-data/overlay-node/test-bus"; - __overlay__ { - - /* suppress DTC warning */ - #address-cells = <1>; - #size-cells = <0>; - - test-unittest11 { - compatible = "unittest"; - status = "okay"; - reg = <11>; - - #address-cells = <1>; - #size-cells = <0>; - - test-unittest111 { - compatible = "unittest"; - status = "okay"; - reg = <1>; - }; - - }; - }; - }; - }; - - /* test enable using absolute target path (i2c) */ - overlay12 { - fragment@0 { - target-path = "/testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest12"; - __overlay__ { - status = "okay"; - }; - }; - }; - - /* test disable using absolute target path (i2c) */ - overlay13 { - fragment@0 { - target-path = "/testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest13"; - __overlay__ { - status = "disabled"; - }; - }; - }; - - /* test mux overlay */ - overlay15 { - fragment@0 { - target-path = "/testcase-data/overlay-node/test-bus/i2c-test-bus"; - __overlay__ { - #address-cells = <1>; - #size-cells = <0>; - test-unittest15 { - reg = <11>; - compatible = "unittest-i2c-mux"; - status = "okay"; - - #address-cells = <1>; - #size-cells = <0>; - - i2c@0 { - #address-cells = <1>; - #size-cells = <0>; - reg = <0>; - - test-mux-dev { - reg = <32>; - compatible = "unittest-i2c-dev"; - status = "okay"; - }; - }; - }; - }; - }; - }; - }; }; diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c index 7a9abaae874d..a23b54780c7d 100644 --- a/drivers/of/unittest.c +++ b/drivers/of/unittest.c @@ -45,6 +45,8 @@ static struct unittest_results { failed; \ }) +static int __init overlay_data_apply(const char *overlay_name, int *overlay_id); + static void __init of_unittest_find_node_by_name(void) { struct device_node *np; @@ -997,8 +999,7 @@ static int __init unittest_data_add(void) } /* - * This lock normally encloses of_overlay_apply() as well as - * of_resolve_phandles(). + * This lock normally encloses of_resolve_phandles() */ of_overlay_mutex_lock(); @@ -1191,12 +1192,12 @@ static int of_unittest_device_exists(int unittest_nr, enum overlay_type ovtype) return 0; } -static const char *overlay_path(int nr) +static const char *overlay_name_from_nr(int nr) { static char buf[256]; snprintf(buf, sizeof(buf) - 1, - "/testcase-data/overlay%d", nr); + "overlay_%d", nr); buf[sizeof(buf) - 1] = '\0'; return buf; @@ -1263,25 +1264,19 @@ static void of_unittest_destroy_tracked_overlays(void) } while (defers > 0); } -static int of_unittest_apply_overlay(int overlay_nr, int unittest_nr, +static int __init of_unittest_apply_overlay(int overlay_nr, int unittest_nr, int *overlay_id) { struct device_node *np = NULL; + const char *overlay_name; int ret; - np = of_find_node_by_path(overlay_path(overlay_nr)); - if (np == NULL) { - unittest(0, "could not find overlay node @\"%s\"\n", - overlay_path(overlay_nr)); - ret = -EINVAL; - goto out; - } + overlay_name = overlay_name_from_nr(overlay_nr); - *overlay_id = 0; - ret = of_overlay_apply(np, overlay_id); - if (ret < 0) { - unittest(0, "could not create overlay from \"%s\"\n", - overlay_path(overlay_nr)); + ret = overlay_data_apply(overlay_name, overlay_id); + if (!ret) { + unittest(0, "could not apply overlay \"%s\"\n", + overlay_name); goto out; } of_unittest_track_overlay(*overlay_id); @@ -1295,15 +1290,16 @@ out: } /* apply an overlay while checking before and after states */ -static int of_unittest_apply_overlay_check(int overlay_nr, int unittest_nr, - int before, int after, enum overlay_type ovtype) +static int __init of_unittest_apply_overlay_check(int overlay_nr, + int unittest_nr, int before, int after, + enum overlay_type ovtype) { int ret, ovcs_id; /* unittest device must not be in before state */ if (of_unittest_device_exists(unittest_nr, ovtype) != before) { - unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n", - overlay_path(overlay_nr), + unittest(0, "%s with device @\"%s\" %s\n", + overlay_name_from_nr(overlay_nr), unittest_path(unittest_nr, ovtype), !before ? "enabled" : "disabled"); return -EINVAL; @@ -1318,8 +1314,8 @@ static int of_unittest_apply_overlay_check(int overlay_nr, int unittest_nr, /* unittest device must be to set to after state */ if (of_unittest_device_exists(unittest_nr, ovtype) != after) { - unittest(0, "overlay @\"%s\" failed to create @\"%s\" %s\n", - overlay_path(overlay_nr), + unittest(0, "%s failed to create @\"%s\" %s\n", + overlay_name_from_nr(overlay_nr), unittest_path(unittest_nr, ovtype), !after ? "enabled" : "disabled"); return -EINVAL; @@ -1329,7 +1325,7 @@ static int of_unittest_apply_overlay_check(int overlay_nr, int unittest_nr, } /* apply an overlay and then revert it while checking before, after states */ -static int of_unittest_apply_revert_overlay_check(int overlay_nr, +static int __init of_unittest_apply_revert_overlay_check(int overlay_nr, int unittest_nr, int before, int after, enum overlay_type ovtype) { @@ -1337,8 +1333,8 @@ static int of_unittest_apply_revert_overlay_check(int overlay_nr, /* unittest device must be in before state */ if (of_unittest_device_exists(unittest_nr, ovtype) != before) { - unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n", - overlay_path(overlay_nr), + unittest(0, "%s with device @\"%s\" %s\n", + overlay_name_from_nr(overlay_nr), unittest_path(unittest_nr, ovtype), !before ? "enabled" : "disabled"); return -EINVAL; @@ -1354,8 +1350,8 @@ static int of_unittest_apply_revert_overlay_check(int overlay_nr, /* unittest device must be in after state */ if (of_unittest_device_exists(unittest_nr, ovtype) != after) { - unittest(0, "overlay @\"%s\" failed to create @\"%s\" %s\n", - overlay_path(overlay_nr), + unittest(0, "%s failed to create @\"%s\" %s\n", + overlay_name_from_nr(overlay_nr), unittest_path(unittest_nr, ovtype), !after ? "enabled" : "disabled"); return -EINVAL; @@ -1363,16 +1359,16 @@ static int of_unittest_apply_revert_overlay_check(int overlay_nr, ret = of_overlay_remove(&ovcs_id); if (ret != 0) { - unittest(0, "overlay @\"%s\" failed to be destroyed @\"%s\"\n", - overlay_path(overlay_nr), + unittest(0, "%s failed to be destroyed @\"%s\"\n", + overlay_name_from_nr(overlay_nr), unittest_path(unittest_nr, ovtype)); return ret; } /* unittest device must be again in before state */ if (of_unittest_device_exists(unittest_nr, PDEV_OVERLAY) != before) { - unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n", - overlay_path(overlay_nr), + unittest(0, "%s with device @\"%s\" %s\n", + overlay_name_from_nr(overlay_nr), unittest_path(unittest_nr, ovtype), !before ? "enabled" : "disabled"); return -EINVAL; @@ -1382,7 +1378,7 @@ static int of_unittest_apply_revert_overlay_check(int overlay_nr, } /* test activation of device */ -static void of_unittest_overlay_0(void) +static void __init of_unittest_overlay_0(void) { int ret; @@ -1395,7 +1391,7 @@ static void of_unittest_overlay_0(void) } /* test deactivation of device */ -static void of_unittest_overlay_1(void) +static void __init of_unittest_overlay_1(void) { int ret; @@ -1408,7 +1404,7 @@ static void of_unittest_overlay_1(void) } /* test activation of device */ -static void of_unittest_overlay_2(void) +static void __init of_unittest_overlay_2(void) { int ret; @@ -1421,7 +1417,7 @@ static void of_unittest_overlay_2(void) } /* test deactivation of device */ -static void of_unittest_overlay_3(void) +static void __init of_unittest_overlay_3(void) { int ret; @@ -1434,7 +1430,7 @@ static void of_unittest_overlay_3(void) } /* test activation of a full device node */ -static void of_unittest_overlay_4(void) +static void __init of_unittest_overlay_4(void) { int ret; @@ -1447,7 +1443,7 @@ static void of_unittest_overlay_4(void) } /* test overlay apply/revert sequence */ -static void of_unittest_overlay_5(void) +static void __init of_unittest_overlay_5(void) { int ret; @@ -1460,19 +1456,19 @@ static void of_unittest_overlay_5(void) } /* test overlay application in sequence */ -static void of_unittest_overlay_6(void) +static void __init of_unittest_overlay_6(void) { - struct device_node *np; int ret, i, ov_id[2], ovcs_id; int overlay_nr = 6, unittest_nr = 6; int before = 0, after = 1; + const char *overlay_name; /* unittest device must be in before state */ for (i = 0; i < 2; i++) { if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY) != before) { - unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n", - overlay_path(overlay_nr + i), + unittest(0, "%s with device @\"%s\" %s\n", + overlay_name_from_nr(overlay_nr + i), unittest_path(unittest_nr + i, PDEV_OVERLAY), !before ? "enabled" : "disabled"); @@ -1483,18 +1479,12 @@ static void of_unittest_overlay_6(void) /* apply the overlays */ for (i = 0; i < 2; i++) { - np = of_find_node_by_path(overlay_path(overlay_nr + i)); - if (np == NULL) { - unittest(0, "could not find overlay node @\"%s\"\n", - overlay_path(overlay_nr + i)); - return; - } + overlay_name = overlay_name_from_nr(overlay_nr + i); - ovcs_id = 0; - ret = of_overlay_apply(np, &ovcs_id); - if (ret < 0) { - unittest(0, "could not create overlay from \"%s\"\n", - overlay_path(overlay_nr + i)); + ret = overlay_data_apply(overlay_name, &ovcs_id); + if (!ret) { + unittest(0, "could not apply overlay \"%s\"\n", + overlay_name); return; } ov_id[i] = ovcs_id; @@ -1506,7 +1496,7 @@ static void of_unittest_overlay_6(void) if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY) != after) { unittest(0, "overlay @\"%s\" failed @\"%s\" %s\n", - overlay_path(overlay_nr + i), + overlay_name_from_nr(overlay_nr + i), unittest_path(unittest_nr + i, PDEV_OVERLAY), !after ? "enabled" : "disabled"); @@ -1518,8 +1508,8 @@ static void of_unittest_overlay_6(void) ovcs_id = ov_id[i]; ret = of_overlay_remove(&ovcs_id); if (ret != 0) { - unittest(0, "overlay @\"%s\" failed destroy @\"%s\"\n", - overlay_path(overlay_nr + i), + unittest(0, "%s failed destroy @\"%s\"\n", + overlay_name_from_nr(overlay_nr + i), unittest_path(unittest_nr + i, PDEV_OVERLAY)); return; @@ -1531,8 +1521,8 @@ static void of_unittest_overlay_6(void) /* unittest device must be again in before state */ if (of_unittest_device_exists(unittest_nr + i, PDEV_OVERLAY) != before) { - unittest(0, "overlay @\"%s\" with device @\"%s\" %s\n", - overlay_path(overlay_nr + i), + unittest(0, "%s with device @\"%s\" %s\n", + overlay_name_from_nr(overlay_nr + i), unittest_path(unittest_nr + i, PDEV_OVERLAY), !before ? "enabled" : "disabled"); @@ -1544,29 +1534,23 @@ static void of_unittest_overlay_6(void) } /* test overlay application in sequence */ -static void of_unittest_overlay_8(void) +static void __init of_unittest_overlay_8(void) { - struct device_node *np; int ret, i, ov_id[2], ovcs_id; int overlay_nr = 8, unittest_nr = 8; + const char *overlay_name; /* we don't care about device state in this test */ /* apply the overlays */ for (i = 0; i < 2; i++) { - np = of_find_node_by_path(overlay_path(overlay_nr + i)); - if (np == NULL) { - unittest(0, "could not find overlay node @\"%s\"\n", - overlay_path(overlay_nr + i)); - return; - } + overlay_name = overlay_name_from_nr(overlay_nr + i); - ovcs_id = 0; - ret = of_overlay_apply(np, &ovcs_id); + ret = overlay_data_apply(overlay_name, &ovcs_id); if (ret < 0) { - unittest(0, "could not create overlay from \"%s\"\n", - overlay_path(overlay_nr + i)); + unittest(0, "could not apply overlay \"%s\"\n", + overlay_name); return; } ov_id[i] = ovcs_id; @@ -1577,8 +1561,8 @@ static void of_unittest_overlay_8(void) ovcs_id = ov_id[0]; ret = of_overlay_remove(&ovcs_id); if (ret == 0) { - unittest(0, "overlay @\"%s\" was destroyed @\"%s\"\n", - overlay_path(overlay_nr + 0), + unittest(0, "%s was destroyed @\"%s\"\n", + overlay_name_from_nr(overlay_nr + 0), unittest_path(unittest_nr, PDEV_OVERLAY)); return; @@ -1589,8 +1573,8 @@ static void of_unittest_overlay_8(void) ovcs_id = ov_id[i]; ret = of_overlay_remove(&ovcs_id); if (ret != 0) { - unittest(0, "overlay @\"%s\" not destroyed @\"%s\"\n", - overlay_path(overlay_nr + i), + unittest(0, "%s not destroyed @\"%s\"\n", + overlay_name_from_nr(overlay_nr + i), unittest_path(unittest_nr, PDEV_OVERLAY)); return; @@ -1602,7 +1586,7 @@ static void of_unittest_overlay_8(void) } /* test insertion of a bus with parent devices */ -static void of_unittest_overlay_10(void) +static void __init of_unittest_overlay_10(void) { int ret; char *child_path; @@ -1625,7 +1609,7 @@ static void of_unittest_overlay_10(void) } /* test insertion of a bus with parent devices (and revert) */ -static void of_unittest_overlay_11(void) +static void __init of_unittest_overlay_11(void) { int ret; @@ -1891,7 +1875,7 @@ static void of_unittest_overlay_i2c_cleanup(void) i2c_del_driver(&unittest_i2c_dev_driver); } -static void of_unittest_overlay_i2c_12(void) +static void __init of_unittest_overlay_i2c_12(void) { int ret; @@ -1904,7 +1888,7 @@ static void of_unittest_overlay_i2c_12(void) } /* test deactivation of device */ -static void of_unittest_overlay_i2c_13(void) +static void __init of_unittest_overlay_i2c_13(void) { int ret; @@ -1921,7 +1905,7 @@ static void of_unittest_overlay_i2c_14(void) { } -static void of_unittest_overlay_i2c_15(void) +static void __init of_unittest_overlay_i2c_15(void) { int ret; @@ -2023,23 +2007,38 @@ static inline void __init of_unittest_overlay(void) { } extern uint8_t __dtb_##name##_begin[]; \ extern uint8_t __dtb_##name##_end[] -#define OVERLAY_INFO(name, expected) \ -{ .dtb_begin = __dtb_##name##_begin, \ - .dtb_end = __dtb_##name##_end, \ - .expected_result = expected, \ +#define OVERLAY_INFO(overlay_name, expected) \ +{ .dtb_begin = __dtb_##overlay_name##_begin, \ + .dtb_end = __dtb_##overlay_name##_end, \ + .expected_result = expected, \ + .name = #overlay_name, \ } struct overlay_info { - uint8_t *dtb_begin; - uint8_t *dtb_end; - void *data; - struct device_node *np_overlay; - int expected_result; - int overlay_id; + uint8_t *dtb_begin; + uint8_t *dtb_end; + int expected_result; + int overlay_id; + char *name; }; OVERLAY_INFO_EXTERN(overlay_base); OVERLAY_INFO_EXTERN(overlay); +OVERLAY_INFO_EXTERN(overlay_0); +OVERLAY_INFO_EXTERN(overlay_1); +OVERLAY_INFO_EXTERN(overlay_2); +OVERLAY_INFO_EXTERN(overlay_3); +OVERLAY_INFO_EXTERN(overlay_4); +OVERLAY_INFO_EXTERN(overlay_5); +OVERLAY_INFO_EXTERN(overlay_6); +OVERLAY_INFO_EXTERN(overlay_7); +OVERLAY_INFO_EXTERN(overlay_8); +OVERLAY_INFO_EXTERN(overlay_9); +OVERLAY_INFO_EXTERN(overlay_10); +OVERLAY_INFO_EXTERN(overlay_11); +OVERLAY_INFO_EXTERN(overlay_12); +OVERLAY_INFO_EXTERN(overlay_13); +OVERLAY_INFO_EXTERN(overlay_15); OVERLAY_INFO_EXTERN(overlay_bad_phandle); OVERLAY_INFO_EXTERN(overlay_bad_symbol); @@ -2047,6 +2046,21 @@ OVERLAY_INFO_EXTERN(overlay_bad_symbol); static struct overlay_info overlays[] = { OVERLAY_INFO(overlay_base, -9999), OVERLAY_INFO(overlay, 0), + OVERLAY_INFO(overlay_0, 0), + OVERLAY_INFO(overlay_1, 0), + OVERLAY_INFO(overlay_2, 0), + OVERLAY_INFO(overlay_3, 0), + OVERLAY_INFO(overlay_4, 0), + OVERLAY_INFO(overlay_5, 0), + OVERLAY_INFO(overlay_6, 0), + OVERLAY_INFO(overlay_7, 0), + OVERLAY_INFO(overlay_8, 0), + OVERLAY_INFO(overlay_9, 0), + OVERLAY_INFO(overlay_10, 0), + OVERLAY_INFO(overlay_11, 0), + OVERLAY_INFO(overlay_12, 0), + OVERLAY_INFO(overlay_13, 0), + OVERLAY_INFO(overlay_15, 0), OVERLAY_INFO(overlay_bad_phandle, -EINVAL), OVERLAY_INFO(overlay_bad_symbol, -EINVAL), {} @@ -2077,6 +2091,7 @@ void __init unittest_unflatten_overlay_base(void) { struct overlay_info *info; u32 data_size; + void *new_fdt; u32 size; info = &overlays[0]; @@ -2098,17 +2113,16 @@ void __init unittest_unflatten_overlay_base(void) return; } - info->data = dt_alloc_memory(size, roundup_pow_of_two(FDT_V17_SIZE)); - if (!info->data) { + new_fdt = dt_alloc_memory(size, roundup_pow_of_two(FDT_V17_SIZE)); + if (!new_fdt) { pr_err("alloc for dtb 'overlay_base' failed"); return; } - memcpy(info->data, info->dtb_begin, size); + memcpy(new_fdt, info->dtb_begin, size); - __unflatten_device_tree(info->data, NULL, &info->np_overlay, + __unflatten_device_tree(new_fdt, NULL, &overlay_base_root, dt_alloc_memory, true); - overlay_base_root = info->np_overlay; } /* @@ -2122,73 +2136,44 @@ void __init unittest_unflatten_overlay_base(void) * * Return 0 on unexpected error. */ -static int __init overlay_data_add(int onum) +static int __init overlay_data_apply(const char *overlay_name, int *overlay_id) { struct overlay_info *info; + int found = 0; int k; int ret; u32 size; - u32 size_from_header; - for (k = 0, info = overlays; info; info++, k++) { - if (k == onum) + for (k = 0, info = overlays; info && info->name; info++, k++) { + if (!strcmp(overlay_name, info->name)) { + found = 1; break; + } } - if (onum > k) + if (!found) { + pr_err("no overlay data for %s\n", overlay_name); return 0; + } size = info->dtb_end - info->dtb_begin; if (!size) { - pr_err("no overlay to attach, %d\n", onum); + pr_err("no overlay data for %s\n", overlay_name); ret = 0; } - size_from_header = fdt_totalsize(info->dtb_begin); - if (size_from_header != size) { - pr_err("overlay header totalsize != actual size, %d", onum); - return 0; - } - - /* - * Must create permanent copy of FDT because of_fdt_unflatten_tree() - * will create pointers to the passed in FDT in the EDT. - */ - info->data = kmemdup(info->dtb_begin, size, GFP_KERNEL); - if (!info->data) { - pr_err("unable to allocate memory for data, %d\n", onum); - return 0; - } - - of_fdt_unflatten_tree(info->data, NULL, &info->np_overlay); - if (!info->np_overlay) { - pr_err("unable to unflatten overlay, %d\n", onum); - ret = 0; - goto out_free_data; - } - - info->overlay_id = 0; - ret = of_overlay_apply(info->np_overlay, &info->overlay_id); - if (ret < 0) { - pr_err("of_overlay_apply() (ret=%d), %d\n", ret, onum); - goto out_free_np_overlay; - } - - pr_debug("__dtb_overlay_begin applied, overlay id %d\n", ret); - - goto out; - -out_free_np_overlay: - /* - * info->np_overlay is the unflattened device tree - * It has not been spliced into the live tree. - */ - - /* todo: function to free unflattened device tree */ + ret = of_overlay_fdt_apply(info->dtb_begin, size, &info->overlay_id); + if (overlay_id) + *overlay_id = info->overlay_id; + if (ret < 0) + goto out; -out_free_data: - kfree(info->data); + pr_debug("%s applied\n", overlay_name); out: + if (ret != info->expected_result) + pr_err("of_overlay_fdt_apply() expected %d, ret=%d, %s\n", + info->expected_result, ret, overlay_name); + return (ret == info->expected_result); } @@ -2290,18 +2275,29 @@ static __init void of_unittest_overlay_high_level(void) __of_attach_node_sysfs(np); if (of_symbols) { + struct property *new_prop; for_each_property_of_node(overlay_base_symbols, prop) { - ret = __of_add_property(of_symbols, prop); + + new_prop = __of_prop_dup(prop, GFP_KERNEL); + if (!new_prop) { + unittest(0, "__of_prop_dup() of '%s' from overlay_base node __symbols__", + prop->name); + goto err_unlock; + } + ret = __of_add_property(of_symbols, new_prop); if (ret) { - unittest(0, - "duplicate property '%s' in overlay_base node __symbols__", + if (!strcmp(new_prop->name, "name")) { + /* auto-generated by unflatten */ + ret = 0; + continue; + } + unittest(0, "duplicate property '%s' in overlay_base node __symbols__", prop->name); goto err_unlock; } - ret = __of_add_property_sysfs(of_symbols, prop); + ret = __of_add_property_sysfs(of_symbols, new_prop); if (ret) { - unittest(0, - "unable to add property '%s' in overlay_base node __symbols__ to sysfs", + unittest(0, "unable to add property '%s' in overlay_base node __symbols__ to sysfs", prop->name); goto err_unlock; } @@ -2313,13 +2309,13 @@ static __init void of_unittest_overlay_high_level(void) /* now do the normal overlay usage test */ - unittest(overlay_data_add(1), + unittest(overlay_data_apply("overlay", NULL), "Adding overlay 'overlay' failed\n"); - unittest(overlay_data_add(2), + unittest(overlay_data_apply("overlay_bad_phandle", NULL), "Adding overlay 'overlay_bad_phandle' failed\n"); - unittest(overlay_data_add(3), + unittest(overlay_data_apply("overlay_bad_symbol", NULL), "Adding overlay 'overlay_bad_symbol' failed\n"); return; diff --git a/include/linux/of.h b/include/linux/of.h index da1ee95241c1..ebf22dd0860c 100644 --- a/include/linux/of.h +++ b/include/linux/of.h @@ -1359,8 +1359,8 @@ struct of_overlay_notify_data { #ifdef CONFIG_OF_OVERLAY -/* ID based overlays; the API for external users */ -int of_overlay_apply(struct device_node *tree, int *ovcs_id); +int of_overlay_fdt_apply(const void *overlay_fdt, u32 overlay_fdt_size, + int *ovcs_id); int of_overlay_remove(int *ovcs_id); int of_overlay_remove_all(void); @@ -1369,7 +1369,7 @@ int of_overlay_notifier_unregister(struct notifier_block *nb); #else -static inline int of_overlay_apply(struct device_node *tree, int *ovcs_id) +static inline int of_overlay_fdt_apply(void *overlay_fdt, int *ovcs_id) { return -ENOTSUPP; } |