X-Git-Url: https://git.proxmox.com/?a=blobdiff_plain;f=device_tree.c;h=6e0632083094de0550643573527648422e9c24a4;hb=8efb339dd47b164429e9a57f36ac5c3dd810a4ce;hp=86a694c95503357a6ee15cbe427922cd31ec319a;hpb=d439b79d730bf219e47c14ab94f1546bcc5045ab;p=mirror_qemu.git

diff --git a/device_tree.c b/device_tree.c
index 86a694c955..6e06320830 100644
--- a/device_tree.c
+++ b/device_tree.c
@@ -11,20 +11,65 @@
  *
  */
 
-#include <stdio.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <unistd.h>
-#include <stdlib.h>
-
-#include "config.h"
+#include "qemu/osdep.h"
+
+#ifdef CONFIG_LINUX
+#include <dirent.h>
+#endif
+
+#include "qapi/error.h"
 #include "qemu-common.h"
-#include "device_tree.h"
+#include "qemu/error-report.h"
+#include "qemu/bswap.h"
+#include "sysemu/device_tree.h"
+#include "sysemu/sysemu.h"
 #include "hw/loader.h"
+#include "hw/boards.h"
+#include "qemu/config-file.h"
 
 #include <libfdt.h>
 
+#define FDT_MAX_SIZE  0x10000
+
+void *create_device_tree(int *sizep)
+{
+    void *fdt;
+    int ret;
+
+    *sizep = FDT_MAX_SIZE;
+    fdt = g_malloc0(FDT_MAX_SIZE);
+    ret = fdt_create(fdt, FDT_MAX_SIZE);
+    if (ret < 0) {
+        goto fail;
+    }
+    ret = fdt_finish_reservemap(fdt);
+    if (ret < 0) {
+        goto fail;
+    }
+    ret = fdt_begin_node(fdt, "");
+    if (ret < 0) {
+        goto fail;
+    }
+    ret = fdt_end_node(fdt);
+    if (ret < 0) {
+        goto fail;
+    }
+    ret = fdt_finish(fdt);
+    if (ret < 0) {
+        goto fail;
+    }
+    ret = fdt_open_into(fdt, fdt, *sizep);
+    if (ret) {
+        error_report("Unable to copy device tree in memory");
+        exit(1);
+    }
+
+    return fdt;
+fail:
+    error_report("%s Couldn't create dt: %s", __func__, fdt_strerror(ret));
+    exit(1);
+}
+
 void *load_device_tree(const char *filename_path, int *sizep)
 {
     int dt_size;
@@ -35,8 +80,8 @@ void *load_device_tree(const char *filename_path, int *sizep)
     *sizep = 0;
     dt_size = get_image_size(filename_path);
     if (dt_size < 0) {
-        printf("Unable to get size of device tree file '%s'\n",
-            filename_path);
+        error_report("Unable to get size of device tree file '%s'",
+                     filename_path);
         goto fail;
     }
 
@@ -48,21 +93,21 @@ void *load_device_tree(const char *filename_path, int *sizep)
 
     dt_file_load_size = load_image(filename_path, fdt);
     if (dt_file_load_size < 0) {
-        printf("Unable to open device tree file '%s'\n",
-               filename_path);
+        error_report("Unable to open device tree file '%s'",
+                     filename_path);
         goto fail;
     }
 
     ret = fdt_open_into(fdt, fdt, dt_size);
     if (ret) {
-        printf("Unable to copy device tree in memory\n");
+        error_report("Unable to copy device tree in memory");
         goto fail;
     }
 
     /* Check sanity of device tree */
     if (fdt_check_header(fdt)) {
-        printf ("Device tree file loaded into memory is invalid: %s\n",
-            filename_path);
+        error_report("Device tree file loaded into memory is invalid: %s",
+                     filename_path);
         goto fail;
     }
     *sizep = dt_size;
@@ -73,84 +118,325 @@ fail:
     return NULL;
 }
 
+#ifdef CONFIG_LINUX
+
+#define SYSFS_DT_BASEDIR "/proc/device-tree"
+
+/**
+ * read_fstree: this function is inspired from dtc read_fstree
+ * @fdt: preallocated fdt blob buffer, to be populated
+ * @dirname: directory to scan under SYSFS_DT_BASEDIR
+ * the search is recursive and the tree is searched down to the
+ * leaves (property files).
+ *
+ * the function asserts in case of error
+ */
+static void read_fstree(void *fdt, const char *dirname)
+{
+    DIR *d;
+    struct dirent *de;
+    struct stat st;
+    const char *root_dir = SYSFS_DT_BASEDIR;
+    const char *parent_node;
+
+    if (strstr(dirname, root_dir) != dirname) {
+        error_setg(&error_fatal, "%s: %s must be searched within %s",
+                   __func__, dirname, root_dir);
+    }
+    parent_node = &dirname[strlen(SYSFS_DT_BASEDIR)];
+
+    d = opendir(dirname);
+    if (!d) {
+        error_setg(&error_fatal, "%s cannot open %s", __func__, dirname);
+    }
+
+    while ((de = readdir(d)) != NULL) {
+        char *tmpnam;
+
+        if (!g_strcmp0(de->d_name, ".")
+            || !g_strcmp0(de->d_name, "..")) {
+            continue;
+        }
+
+        tmpnam = g_strdup_printf("%s/%s", dirname, de->d_name);
+
+        if (lstat(tmpnam, &st) < 0) {
+            error_setg(&error_fatal, "%s cannot lstat %s", __func__, tmpnam);
+        }
+
+        if (S_ISREG(st.st_mode)) {
+            gchar *val;
+            gsize len;
+
+            if (!g_file_get_contents(tmpnam, &val, &len, NULL)) {
+                error_setg(&error_fatal, "%s not able to extract info from %s",
+                           __func__, tmpnam);
+            }
+
+            if (strlen(parent_node) > 0) {
+                qemu_fdt_setprop(fdt, parent_node,
+                                 de->d_name, val, len);
+            } else {
+                qemu_fdt_setprop(fdt, "/", de->d_name, val, len);
+            }
+            g_free(val);
+        } else if (S_ISDIR(st.st_mode)) {
+            char *node_name;
+
+            node_name = g_strdup_printf("%s/%s",
+                                        parent_node, de->d_name);
+            qemu_fdt_add_subnode(fdt, node_name);
+            g_free(node_name);
+            read_fstree(fdt, tmpnam);
+        }
+
+        g_free(tmpnam);
+    }
+
+    closedir(d);
+}
+
+/* load_device_tree_from_sysfs: extract the dt blob from host sysfs */
+void *load_device_tree_from_sysfs(void)
+{
+    void *host_fdt;
+    int host_fdt_size;
+
+    host_fdt = create_device_tree(&host_fdt_size);
+    read_fstree(host_fdt, SYSFS_DT_BASEDIR);
+    if (fdt_check_header(host_fdt)) {
+        error_setg(&error_fatal,
+                   "%s host device tree extracted into memory is invalid",
+                   __func__);
+    }
+    return host_fdt;
+}
+
+#endif /* CONFIG_LINUX */
+
 static int findnode_nofail(void *fdt, const char *node_path)
 {
     int offset;
 
     offset = fdt_path_offset(fdt, node_path);
     if (offset < 0) {
-        fprintf(stderr, "%s Couldn't find node %s: %s\n", __func__, node_path,
-                fdt_strerror(offset));
+        error_report("%s Couldn't find node %s: %s", __func__, node_path,
+                     fdt_strerror(offset));
         exit(1);
     }
 
     return offset;
 }
 
-int qemu_devtree_setprop(void *fdt, const char *node_path,
-                         const char *property, void *val_array, int size)
+char **qemu_fdt_node_path(void *fdt, const char *name, char *compat,
+                          Error **errp)
+{
+    int offset, len, ret;
+    const char *iter_name;
+    unsigned int path_len = 16, n = 0;
+    GSList *path_list = NULL, *iter;
+    char **path_array;
+
+    offset = fdt_node_offset_by_compatible(fdt, -1, compat);
+
+    while (offset >= 0) {
+        iter_name = fdt_get_name(fdt, offset, &len);
+        if (!iter_name) {
+            offset = len;
+            break;
+        }
+        if (!strcmp(iter_name, name)) {
+            char *path;
+
+            path = g_malloc(path_len);
+            while ((ret = fdt_get_path(fdt, offset, path, path_len))
+                  == -FDT_ERR_NOSPACE) {
+                path_len += 16;
+                path = g_realloc(path, path_len);
+            }
+            path_list = g_slist_prepend(path_list, path);
+            n++;
+        }
+        offset = fdt_node_offset_by_compatible(fdt, offset, compat);
+    }
+
+    if (offset < 0 && offset != -FDT_ERR_NOTFOUND) {
+        error_setg(errp, "%s: abort parsing dt for %s/%s: %s",
+                   __func__, name, compat, fdt_strerror(offset));
+        for (iter = path_list; iter; iter = iter->next) {
+            g_free(iter->data);
+        }
+        g_slist_free(path_list);
+        return NULL;
+    }
+
+    path_array = g_new(char *, n + 1);
+    path_array[n--] = NULL;
+
+    for (iter = path_list; iter; iter = iter->next) {
+        path_array[n--] = iter->data;
+    }
+
+    g_slist_free(path_list);
+
+    return path_array;
+}
+
+int qemu_fdt_setprop(void *fdt, const char *node_path,
+                     const char *property, const void *val, int size)
 {
     int r;
 
-    r = fdt_setprop(fdt, findnode_nofail(fdt, node_path), property, val_array, size);
+    r = fdt_setprop(fdt, findnode_nofail(fdt, node_path), property, val, size);
     if (r < 0) {
-        fprintf(stderr, "%s: Couldn't set %s/%s: %s\n", __func__, node_path,
-                property, fdt_strerror(r));
+        error_report("%s: Couldn't set %s/%s: %s", __func__, node_path,
+                     property, fdt_strerror(r));
         exit(1);
     }
 
     return r;
 }
 
-int qemu_devtree_setprop_cell(void *fdt, const char *node_path,
-                              const char *property, uint32_t val)
+int qemu_fdt_setprop_cell(void *fdt, const char *node_path,
+                          const char *property, uint32_t val)
 {
     int r;
 
     r = fdt_setprop_cell(fdt, findnode_nofail(fdt, node_path), property, val);
     if (r < 0) {
-        fprintf(stderr, "%s: Couldn't set %s/%s = %#08x: %s\n", __func__,
-                node_path, property, val, fdt_strerror(r));
+        error_report("%s: Couldn't set %s/%s = %#08x: %s", __func__,
+                     node_path, property, val, fdt_strerror(r));
         exit(1);
     }
 
     return r;
 }
 
-int qemu_devtree_setprop_string(void *fdt, const char *node_path,
-                                const char *property, const char *string)
+int qemu_fdt_setprop_u64(void *fdt, const char *node_path,
+                         const char *property, uint64_t val)
+{
+    val = cpu_to_be64(val);
+    return qemu_fdt_setprop(fdt, node_path, property, &val, sizeof(val));
+}
+
+int qemu_fdt_setprop_string(void *fdt, const char *node_path,
+                            const char *property, const char *string)
 {
     int r;
 
     r = fdt_setprop_string(fdt, findnode_nofail(fdt, node_path), property, string);
     if (r < 0) {
-        fprintf(stderr, "%s: Couldn't set %s/%s = %s: %s\n", __func__,
-                node_path, property, string, fdt_strerror(r));
+        error_report("%s: Couldn't set %s/%s = %s: %s", __func__,
+                     node_path, property, string, fdt_strerror(r));
+        exit(1);
+    }
+
+    return r;
+}
+
+const void *qemu_fdt_getprop(void *fdt, const char *node_path,
+                             const char *property, int *lenp, Error **errp)
+{
+    int len;
+    const void *r;
+
+    if (!lenp) {
+        lenp = &len;
+    }
+    r = fdt_getprop(fdt, findnode_nofail(fdt, node_path), property, lenp);
+    if (!r) {
+        error_setg(errp, "%s: Couldn't get %s/%s: %s", __func__,
+                  node_path, property, fdt_strerror(*lenp));
+    }
+    return r;
+}
+
+uint32_t qemu_fdt_getprop_cell(void *fdt, const char *node_path,
+                               const char *property, int *lenp, Error **errp)
+{
+    int len;
+    const uint32_t *p;
+
+    if (!lenp) {
+        lenp = &len;
+    }
+    p = qemu_fdt_getprop(fdt, node_path, property, lenp, errp);
+    if (!p) {
+        return 0;
+    } else if (*lenp != 4) {
+        error_setg(errp, "%s: %s/%s not 4 bytes long (not a cell?)",
+                   __func__, node_path, property);
+        *lenp = -EINVAL;
+        return 0;
+    }
+    return be32_to_cpu(*p);
+}
+
+uint32_t qemu_fdt_get_phandle(void *fdt, const char *path)
+{
+    uint32_t r;
+
+    r = fdt_get_phandle(fdt, findnode_nofail(fdt, path));
+    if (r == 0) {
+        error_report("%s: Couldn't get phandle for %s: %s", __func__,
+                     path, fdt_strerror(r));
         exit(1);
     }
 
     return r;
 }
 
-int qemu_devtree_nop_node(void *fdt, const char *node_path)
+int qemu_fdt_setprop_phandle(void *fdt, const char *node_path,
+                             const char *property,
+                             const char *target_node_path)
+{
+    uint32_t phandle = qemu_fdt_get_phandle(fdt, target_node_path);
+    return qemu_fdt_setprop_cell(fdt, node_path, property, phandle);
+}
+
+uint32_t qemu_fdt_alloc_phandle(void *fdt)
+{
+    static int phandle = 0x0;
+
+    /*
+     * We need to find out if the user gave us special instruction at
+     * which phandle id to start allocating phandles.
+     */
+    if (!phandle) {
+        phandle = machine_phandle_start(current_machine);
+    }
+
+    if (!phandle) {
+        /*
+         * None or invalid phandle given on the command line, so fall back to
+         * default starting point.
+         */
+        phandle = 0x8000;
+    }
+
+    return phandle++;
+}
+
+int qemu_fdt_nop_node(void *fdt, const char *node_path)
 {
     int r;
 
     r = fdt_nop_node(fdt, findnode_nofail(fdt, node_path));
     if (r < 0) {
-        fprintf(stderr, "%s: Couldn't nop node %s: %s\n", __func__, node_path,
-                fdt_strerror(r));
+        error_report("%s: Couldn't nop node %s: %s", __func__, node_path,
+                     fdt_strerror(r));
         exit(1);
     }
 
     return r;
 }
 
-int qemu_devtree_add_subnode(void *fdt, const char *name)
+int qemu_fdt_add_subnode(void *fdt, const char *name)
 {
     char *dupname = g_strdup(name);
     char *basename = strrchr(dupname, '/');
     int retval;
+    int parent = 0;
 
     if (!basename) {
         g_free(dupname);
@@ -160,13 +446,66 @@ int qemu_devtree_add_subnode(void *fdt, const char *name)
     basename[0] = '\0';
     basename++;
 
-    retval = fdt_add_subnode(fdt, findnode_nofail(fdt, dupname), basename);
+    if (dupname[0]) {
+        parent = findnode_nofail(fdt, dupname);
+    }
+
+    retval = fdt_add_subnode(fdt, parent, basename);
     if (retval < 0) {
-        fprintf(stderr, "FDT: Failed to create subnode %s: %s\n", name,
-                fdt_strerror(retval));
+        error_report("FDT: Failed to create subnode %s: %s", name,
+                     fdt_strerror(retval));
         exit(1);
     }
 
     g_free(dupname);
     return retval;
 }
+
+void qemu_fdt_dumpdtb(void *fdt, int size)
+{
+    const char *dumpdtb = qemu_opt_get(qemu_get_machine_opts(), "dumpdtb");
+
+    if (dumpdtb) {
+        /* Dump the dtb to a file and quit */
+        exit(g_file_set_contents(dumpdtb, fdt, size, NULL) ? 0 : 1);
+    }
+}
+
+int qemu_fdt_setprop_sized_cells_from_array(void *fdt,
+                                            const char *node_path,
+                                            const char *property,
+                                            int numvalues,
+                                            uint64_t *values)
+{
+    uint32_t *propcells;
+    uint64_t value;
+    int cellnum, vnum, ncells;
+    uint32_t hival;
+    int ret;
+
+    propcells = g_new0(uint32_t, numvalues * 2);
+
+    cellnum = 0;
+    for (vnum = 0; vnum < numvalues; vnum++) {
+        ncells = values[vnum * 2];
+        if (ncells != 1 && ncells != 2) {
+            ret = -1;
+            goto out;
+        }
+        value = values[vnum * 2 + 1];
+        hival = cpu_to_be32(value >> 32);
+        if (ncells > 1) {
+            propcells[cellnum++] = hival;
+        } else if (hival != 0) {
+            ret = -1;
+            goto out;
+        }
+        propcells[cellnum++] = cpu_to_be32(value);
+    }
+
+    ret = qemu_fdt_setprop(fdt, node_path, property, propcells,
+                           cellnum * sizeof(uint32_t));
+out:
+    g_free(propcells);
+    return ret;
+}