git: caa14c7b600d - stable/13 - fdt: Expose the model, compatible and freebsd dts brandind as sysctl
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Date: Wed, 09 Mar 2022 15:35:47 UTC
The branch stable/13 has been updated by karels: URL: https://cgit.FreeBSD.org/src/commit/?id=caa14c7b600d3d15042ada340665f7b0aed4b415 commit caa14c7b600d3d15042ada340665f7b0aed4b415 Author: Emmanuel Vadot <manu@FreeBSD.org> AuthorDate: 2021-07-17 15:19:22 +0000 Commit: Mike Karels <karels@FreeBSD.org> CommitDate: 2022-03-09 15:27:28 +0000 fdt: Expose the model, compatible and freebsd dts brandind as sysctl This make it easier for script to get the hardware on which they are running. Sponsored by: Diablotin Systems Differential Revision: https://reviews.freebsd.org/D31205 Reviewed by: imp Should be ok on powerpc: jhibbits (over irc) (cherry picked from commit 50e0dc0c4b46ee62b898ce2d92e52be4f77383d9) --- sys/dev/ofw/ofw_fdt.c | 39 ++++++++++++++++++++++++++++++++++++++- 1 file changed, 38 insertions(+), 1 deletion(-) diff --git a/sys/dev/ofw/ofw_fdt.c b/sys/dev/ofw/ofw_fdt.c index 8e5840424860..a83f7cbdcb60 100644 --- a/sys/dev/ofw/ofw_fdt.c +++ b/sys/dev/ofw/ofw_fdt.c @@ -104,7 +104,14 @@ static ofw_def_t ofw_fdt = { }; OFW_DEF(ofw_fdt); +#define FDT_FBSDVER_LEN 16 +#define FDT_MODEL_LEN 80 +#define FDT_COMPAT_LEN 255 + static void *fdtp = NULL; +static char fdt_model[FDT_MODEL_LEN]; +static char fdt_compatible[FDT_COMPAT_LEN]; +static char fdt_fbsd_version[FDT_FBSDVER_LEN]; static int sysctl_handle_dtb(SYSCTL_HANDLER_ARGS) @@ -124,19 +131,50 @@ sysctl_register_fdt_oid(void *arg) SYSCTL_ADD_PROC(NULL, SYSCTL_STATIC_CHILDREN(_hw_fdt), OID_AUTO, "dtb", CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0, sysctl_handle_dtb, "", "Device Tree Blob"); + if (fdt_model[0] != '\0') + SYSCTL_ADD_STRING(NULL, SYSCTL_STATIC_CHILDREN(_hw_fdt), + OID_AUTO, "model", CTLFLAG_RD, fdt_model, + FDT_MODEL_LEN, "System board model"); + if (fdt_compatible[0] != '\0') + SYSCTL_ADD_STRING(NULL, SYSCTL_STATIC_CHILDREN(_hw_fdt), + OID_AUTO, "compatible", CTLFLAG_RD, fdt_compatible, + FDT_COMPAT_LEN, "Compatible platforms"); + if (fdt_fbsd_version[0] != '\0') + SYSCTL_ADD_STRING(NULL, SYSCTL_STATIC_CHILDREN(_hw_fdt), + OID_AUTO, "freebsd-version", CTLFLAG_RD, fdt_fbsd_version, + FDT_FBSDVER_LEN, "FreeBSD DTS branding version"); } SYSINIT(dtb_oid, SI_SUB_KMEM, SI_ORDER_ANY, sysctl_register_fdt_oid, NULL); static int ofw_fdt_init(ofw_t ofw, void *data) { + phandle_t root; + ssize_t len; int err; + int i; /* Check FDT blob integrity */ if ((err = fdt_check_header(data)) != 0) return (err); fdtp = data; + root = ofw_fdt_finddevice(NULL, "/"); + len = ofw_fdt_getproplen(NULL, root, "model"); + bzero(fdt_model, FDT_MODEL_LEN); + ofw_fdt_getprop(NULL, root, "model", fdt_model, FDT_MODEL_LEN); + len = ofw_fdt_getproplen(NULL, root, "compatible"); + bzero(fdt_compatible, FDT_COMPAT_LEN); + ofw_fdt_getprop(NULL, root, "compatible", fdt_compatible, FDT_COMPAT_LEN); + /* Replace the middle '\0' with ' ' */ + for (i = 0; i < len - 1; i++) + if (fdt_compatible[i] == '\0') + fdt_compatible[i] = ' '; + if ((len = ofw_fdt_getproplen(NULL, root, "freebsd,dts-version")) > 0) { + bzero(fdt_fbsd_version, FDT_FBSDVER_LEN); + ofw_fdt_getprop(NULL, root, "freebsd,dts-version", + fdt_fbsd_version, FDT_FBSDVER_LEN); + } return (0); } @@ -410,7 +448,6 @@ ofw_fdt_package_to_path(ofw_t ofw, phandle_t package, char *buf, size_t len) static int ofw_fdt_fixup(ofw_t ofw) { -#define FDT_MODEL_LEN 80 char model[FDT_MODEL_LEN]; phandle_t root; ssize_t len;