7622 Separate DRM+AGP devlinks stuff into its own module

Reviewed by: Hans Rosenfeld <rosenfeld@grumpf.hope-2000.org>
Reviewed by: Toomas Soome <tsoome@me.com>
Approved by: Richard Lowe <richlowe@richlowe.net>

3 files changed, 319 insertions, 248 deletions

diff --git a/usr/src/cmd/devfsadm/i386/Makefile b/usr/src/cmd/devfsadm/i386/Makefile
index 1f14c93dad..179db79979 100644
--- a/usr/src/cmd/devfsadm/i386/Makefile
+++ b/usr/src/cmd/devfsadm/i386/Makefile
@@ -23,6 +23,7 @@
 #
 
 LINK_OBJS_i386 = \
+	drm_link_i386.o \
 	misc_link_i386.o \
 	xen_link.o
 
diff --git a/usr/src/cmd/devfsadm/i386/drm_link_i386.c b/usr/src/cmd/devfsadm/i386/drm_link_i386.c
new file mode 100644
index 0000000000..ab29ab7899
--- /dev/null
+++ b/usr/src/cmd/devfsadm/i386/drm_link_i386.c
@@ -0,0 +1,318 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ * Copyright 2012 Joyent, Inc.  All rights reserved.
+ */
+
+#include <regex.h>
+#include <devfsadm.h>
+#include <stdio.h>
+#include <strings.h>
+#include <stdlib.h>
+#include <limits.h>
+#include <ctype.h>
+
+/*
+ * Note: separate from misc_link_i386.c because this will later
+ * move to the gfx-drm gate.
+ */
+
+static int agp_process(di_minor_t minor, di_node_t node);
+static int drm_node(di_minor_t minor, di_node_t node);
+
+static devfsadm_create_t drm_cbt[] = {
+	{ "drm", "ddi_display:drm", NULL,
+	    TYPE_EXACT, ILEVEL_0,	drm_node
+	},
+	{ "agp", "ddi_agp:pseudo", NULL,
+	    TYPE_EXACT, ILEVEL_0, agp_process
+	},
+	{ "agp", "ddi_agp:target", NULL,
+	    TYPE_EXACT, ILEVEL_0, agp_process
+	},
+	{ "agp", "ddi_agp:cpugart", NULL,
+	    TYPE_EXACT, ILEVEL_0, agp_process
+	},
+	{ "agp", "ddi_agp:master", NULL,
+	    TYPE_EXACT, ILEVEL_0, agp_process
+	},
+};
+
+DEVFSADM_CREATE_INIT_V0(drm_cbt);
+
+/*
+ * For debugging, run devfsadm like this:
+ *  devfsadm -V drm_mid -V devfsadm:enum -c drm
+ */
+static char *debug_mid = "drm_mid";
+
+typedef enum {
+	DRIVER_AGPPSEUDO = 0,
+	DRIVER_AGPTARGET,
+	DRIVER_CPUGART,
+	DRIVER_AGPMASTER_DRM_I915,
+	DRIVER_AGPMASTER_DRM_RADEON,
+	DRIVER_AGPMASTER_VGATEXT,
+	DRIVER_UNKNOWN
+} driver_defs_t;
+
+typedef struct {
+	char	*driver_name;
+	int	index;
+} driver_name_table_entry_t;
+
+static driver_name_table_entry_t driver_name_table[] = {
+	{ "agpgart",		DRIVER_AGPPSEUDO },
+	{ "agptarget",		DRIVER_AGPTARGET },
+	{ "amd64_gart",		DRIVER_CPUGART },
+	/* AGP master device managed by drm driver */
+	{ "i915",		DRIVER_AGPMASTER_DRM_I915 },
+	{ "radeon",		DRIVER_AGPMASTER_DRM_RADEON },
+	{ "vgatext",		DRIVER_AGPMASTER_VGATEXT },
+	{ NULL,			DRIVER_UNKNOWN }
+};
+
+static devfsadm_enumerate_t agptarget_rules[1] =
+	{ "^agp$/^agptarget([0-9]+)$", 1, MATCH_ALL };
+static devfsadm_enumerate_t cpugart_rules[1] =
+	{ "^agp$/^cpugart([0-9]+)$", 1, MATCH_ALL };
+static devfsadm_enumerate_t agpmaster_rules[1] =
+	{ "^agp$/^agpmaster([0-9]+)$", 1, MATCH_ALL };
+static devfsadm_enumerate_t drm_rules[1] =
+	{ "^dri$/^card([0-9]+)$", 1, MATCH_ALL };
+
+
+/*
+ * HOT auto cleanup of drm+agp links not desired.
+ */
+static devfsadm_remove_t drm_remove_cbt[] = {
+	{ "agp", "^agpgart$", RM_POST,
+		ILEVEL_0, devfsadm_rm_all
+	},
+	{ "agp", "^agp/agpmaster[0-9]+$", RM_POST,
+		ILEVEL_0, devfsadm_rm_all
+	},
+	{ "agp", "^agp/agptarget[0-9]+$", RM_POST,
+		ILEVEL_0, devfsadm_rm_all
+	},
+	{ "agp", "^agp/cpugart[0-9]+$", RM_POST,
+		ILEVEL_0, devfsadm_rm_all
+	},
+	{ "drm", "^dri/card[0-9]+$", RM_POST,
+		ILEVEL_0, devfsadm_rm_all
+	},
+};
+
+DEVFSADM_REMOVE_INIT_V0(drm_remove_cbt);
+
+static int
+agp_process(di_minor_t minor, di_node_t node)
+{
+	char *minor_nm, *drv_nm;
+	char *devfspath;
+	char *I_path, *p_path, *buf;
+	char *name = (char *)NULL;
+	int i, index;
+	devfsadm_enumerate_t rules[1];
+
+	minor_nm = di_minor_name(minor);
+	drv_nm = di_driver_name(node);
+
+	if ((minor_nm == NULL) || (drv_nm == NULL)) {
+		return (DEVFSADM_CONTINUE);
+	}
+
+	devfsadm_print(debug_mid, "agp_process: minor=%s node=%s\n",
+	    minor_nm, di_node_name(node));
+
+	devfspath = di_devfs_path(node);
+	if (devfspath == NULL) {
+		devfsadm_print(debug_mid, "agp_process: devfspath is NULL\n");
+		return (DEVFSADM_CONTINUE);
+	}
+
+	I_path = (char *)malloc(PATH_MAX);
+
+	if (I_path == NULL) {
+		di_devfs_path_free(devfspath);
+		devfsadm_print(debug_mid,  "agp_process: malloc failed\n");
+		return (DEVFSADM_CONTINUE);
+	}
+
+	p_path = (char *)malloc(PATH_MAX);
+
+	if (p_path == NULL) {
+		devfsadm_print(debug_mid,  "agp_process: malloc failed\n");
+		di_devfs_path_free(devfspath);
+		free(I_path);
+		return (DEVFSADM_CONTINUE);
+	}
+
+	(void) strlcpy(p_path, devfspath, PATH_MAX);
+	(void) strlcat(p_path, ":", PATH_MAX);
+	(void) strlcat(p_path, minor_nm, PATH_MAX);
+	di_devfs_path_free(devfspath);
+
+	devfsadm_print(debug_mid, "agp_process: path %s\n", p_path);
+
+	for (i = 0; ; i++) {
+		if ((driver_name_table[i].driver_name == NULL) ||
+		    (strcmp(drv_nm, driver_name_table[i].driver_name) == 0)) {
+			index = driver_name_table[i].index;
+			break;
+		}
+	}
+	switch (index) {
+	case DRIVER_AGPPSEUDO:
+		devfsadm_print(debug_mid,
+		    "agp_process: psdeudo driver name\n");
+		name = "agpgart";
+		(void) snprintf(I_path, PATH_MAX, "%s", name);
+		devfsadm_print(debug_mid,
+		    "mklink %s -> %s\n", I_path, p_path);
+
+		(void) devfsadm_mklink(I_path, node, minor, 0);
+
+		free(I_path);
+		free(p_path);
+		return (DEVFSADM_CONTINUE);
+	case DRIVER_AGPTARGET:
+		devfsadm_print(debug_mid,
+		    "agp_process: target driver name\n");
+		rules[0] = agptarget_rules[0];
+		name = "agptarget";
+		break;
+	case DRIVER_CPUGART:
+		devfsadm_print(debug_mid,
+		    "agp_process: cpugart driver name\n");
+		rules[0] = cpugart_rules[0];
+		name = "cpugart";
+		break;
+	case DRIVER_AGPMASTER_DRM_I915:
+	case DRIVER_AGPMASTER_DRM_RADEON:
+	case DRIVER_AGPMASTER_VGATEXT:
+		devfsadm_print(debug_mid,
+		    "agp_process: agpmaster driver name\n");
+		rules[0] = agpmaster_rules[0];
+		name = "agpmaster";
+		break;
+	case DRIVER_UNKNOWN:
+		devfsadm_print(debug_mid,
+		    "agp_process: unknown driver name=%s\n", drv_nm);
+		free(I_path);
+		free(p_path);
+		return (DEVFSADM_CONTINUE);
+	}
+
+	if (devfsadm_enumerate_int(p_path, 0, &buf, rules, 1)) {
+		devfsadm_print(debug_mid, "agp_process: exit/coninue\n");
+		free(I_path);
+		free(p_path);
+		return (DEVFSADM_CONTINUE);
+	}
+
+
+	(void) snprintf(I_path, PATH_MAX, "agp/%s%s", name, buf);
+
+	devfsadm_print(debug_mid, "agp_process: p_path=%s buf=%s\n",
+	    p_path, buf);
+
+	free(buf);
+
+	devfsadm_print(debug_mid, "mklink %s -> %s\n", I_path, p_path);
+
+	(void) devfsadm_mklink(I_path, node, minor, 0);
+
+	free(p_path);
+	free(I_path);
+
+	return (DEVFSADM_CONTINUE);
+}
+
+static int
+drm_node(di_minor_t minor, di_node_t node)
+{
+	char *minor_nm, *drv_nm;
+	char *devfspath;
+	char *I_path, *p_path, *buf;
+	char *name = "card";
+
+	minor_nm = di_minor_name(minor);
+	drv_nm = di_driver_name(node);
+	if ((minor_nm == NULL) || (drv_nm == NULL)) {
+		return (DEVFSADM_CONTINUE);
+	}
+
+	devfsadm_print(debug_mid, "drm_node: minor=%s node=%s type=%s\n",
+	    minor_nm, di_node_name(node), di_minor_nodetype(minor));
+
+	devfspath = di_devfs_path(node);
+	if (devfspath == NULL) {
+		devfsadm_print(debug_mid, "drm_node: devfspath is NULL\n");
+		return (DEVFSADM_CONTINUE);
+	}
+
+	I_path = (char *)malloc(PATH_MAX);
+
+	if (I_path == NULL) {
+		di_devfs_path_free(devfspath);
+		devfsadm_print(debug_mid,  "drm_node: malloc failed\n");
+		return (DEVFSADM_CONTINUE);
+	}
+
+	p_path = (char *)malloc(PATH_MAX);
+
+	if (p_path == NULL) {
+		devfsadm_print(debug_mid,  "drm_node: malloc failed\n");
+		di_devfs_path_free(devfspath);
+		free(I_path);
+		return (DEVFSADM_CONTINUE);
+	}
+
+	(void) strlcpy(p_path, devfspath, PATH_MAX);
+	(void) strlcat(p_path, ":", PATH_MAX);
+	(void) strlcat(p_path, minor_nm, PATH_MAX);
+	di_devfs_path_free(devfspath);
+
+	devfsadm_print(debug_mid, "drm_node: p_path %s\n", p_path);
+
+	if (devfsadm_enumerate_int(p_path, 0, &buf, drm_rules, 1)) {
+		free(p_path);
+		devfsadm_print(debug_mid, "drm_node: exit/coninue\n");
+		return (DEVFSADM_CONTINUE);
+	}
+	(void) snprintf(I_path, PATH_MAX, "dri/%s%s", name, buf);
+
+	devfsadm_print(debug_mid, "drm_node: p_path=%s buf=%s\n",
+	    p_path, buf);
+
+	free(buf);
+
+	devfsadm_print(debug_mid, "mklink %s -> %s\n", I_path, p_path);
+	(void) devfsadm_mklink(I_path, node, minor, 0);
+
+	free(p_path);
+	free(I_path);
+
+	return (0);
+}
diff --git a/usr/src/cmd/devfsadm/i386/misc_link_i386.c b/usr/src/cmd/devfsadm/i386/misc_link_i386.c
index 5d2e18ad8a..84a24b1092 100644
--- a/usr/src/cmd/devfsadm/i386/misc_link_i386.c
+++ b/usr/src/cmd/devfsadm/i386/misc_link_i386.c
@@ -44,8 +44,6 @@ static int vt00(di_minor_t minor, di_node_t node);
 static int kdmouse(di_minor_t minor, di_node_t node);
 static int ipmi(di_minor_t minor, di_node_t node);
 static int smbios(di_minor_t minor, di_node_t node);
-static int agp_process(di_minor_t minor, di_node_t node);
-static int drm_node(di_minor_t minor, di_node_t node);
 static int mc_node(di_minor_t minor, di_node_t node);
 static int xsvc(di_minor_t minor, di_node_t node);
 static int srn(di_minor_t minor, di_node_t node);
@@ -57,9 +55,6 @@ static devfsadm_create_t misc_cbt[] = {
 	{ "vt00", "ddi_display", NULL,
 	    TYPE_EXACT, ILEVEL_0,	vt00
 	},
-	{ "drm", "ddi_display:drm", NULL,
-	    TYPE_EXACT, ILEVEL_0,	drm_node
-	},
 	{ "mouse", "ddi_mouse", "mouse8042",
 	    TYPE_EXACT | DRV_EXACT, ILEVEL_0, kdmouse
 	},
@@ -82,18 +77,6 @@ static devfsadm_create_t misc_cbt[] = {
 	{ "serial",  "ddi_serial:dialout,mb", NULL,
 	    TYPE_EXACT, ILEVEL_1, serial_dialout
 	},
-	{ "agp", "ddi_agp:pseudo", NULL,
-	    TYPE_EXACT, ILEVEL_0, agp_process
-	},
-	{ "agp", "ddi_agp:target", NULL,
-	    TYPE_EXACT, ILEVEL_0, agp_process
-	},
-	{ "agp", "ddi_agp:cpugart", NULL,
-	    TYPE_EXACT, ILEVEL_0, agp_process
-	},
-	{ "agp", "ddi_agp:master", NULL,
-	    TYPE_EXACT, ILEVEL_0, agp_process
-	},
 	{ "pseudo", "ddi_pseudo", NULL,
 	    TYPE_EXACT, ILEVEL_0, xsvc
 	},
@@ -113,41 +96,6 @@ static devfsadm_create_t misc_cbt[] = {
 
 DEVFSADM_CREATE_INIT_V0(misc_cbt);
 
-static char *debug_mid = "misc_mid";
-
-typedef enum {
-	DRIVER_AGPPSEUDO = 0,
-	DRIVER_AGPTARGET,
-	DRIVER_CPUGART,
-	DRIVER_AGPMASTER_DRM_I915,
-	DRIVER_AGPMASTER_DRM_RADEON,
-	DRIVER_AGPMASTER_VGATEXT,
-	DRIVER_UNKNOWN
-} driver_defs_t;
-
-typedef struct {
-	char	*driver_name;
-	int	index;
-} driver_name_table_entry_t;
-
-static driver_name_table_entry_t driver_name_table[] = {
-	{ "agpgart",		DRIVER_AGPPSEUDO },
-	{ "agptarget",		DRIVER_AGPTARGET },
-	{ "amd64_gart",		DRIVER_CPUGART },
-	/* AGP master device managed by drm driver */
-	{ "i915",		DRIVER_AGPMASTER_DRM_I915 },
-	{ "radeon",		DRIVER_AGPMASTER_DRM_RADEON },
-	{ "vgatext",		DRIVER_AGPMASTER_VGATEXT },
-	{ NULL,			DRIVER_UNKNOWN }
-};
-
-static devfsadm_enumerate_t agptarget_rules[1] =
-	{ "^agp$/^agptarget([0-9]+)$", 1, MATCH_ALL };
-static devfsadm_enumerate_t cpugart_rules[1] =
-	{ "^agp$/^cpugart([0-9]+)$", 1, MATCH_ALL };
-static devfsadm_enumerate_t agpmaster_rules[1] =
-	{  "^agp$/^agpmaster([0-9]+)$", 1, MATCH_ALL };
-
 static devfsadm_remove_t misc_remove_cbt[] = {
 	{ "vt", "vt[0-9][0-9]", RM_PRE|RM_ALWAYS,
 		ILEVEL_0, devfsadm_rm_all
@@ -368,202 +316,6 @@ smbios(di_minor_t minor, di_node_t node)
 	return (DEVFSADM_CONTINUE);
 }
 
-static int
-agp_process(di_minor_t minor, di_node_t node)
-{
-	char *minor_nm, *drv_nm;
-	char *devfspath;
-	char *I_path, *p_path, *buf;
-	char *name = (char *)NULL;
-	int i, index;
-	devfsadm_enumerate_t rules[1];
-
-	minor_nm = di_minor_name(minor);
-	drv_nm = di_driver_name(node);
-
-	if ((minor_nm == NULL) || (drv_nm == NULL)) {
-		return (DEVFSADM_CONTINUE);
-	}
-
-	devfsadm_print(debug_mid, "agp_process: minor=%s node=%s\n",
-	    minor_nm, di_node_name(node));
-
-	devfspath = di_devfs_path(node);
-	if (devfspath == NULL) {
-		devfsadm_print(debug_mid, "agp_process: devfspath is NULL\n");
-		return (DEVFSADM_CONTINUE);
-	}
-
-	I_path = (char *)malloc(PATH_MAX);
-
-	if (I_path == NULL) {
-		di_devfs_path_free(devfspath);
-		devfsadm_print(debug_mid,  "agp_process: malloc failed\n");
-		return (DEVFSADM_CONTINUE);
-	}
-
-	p_path = (char *)malloc(PATH_MAX);
-
-	if (p_path == NULL) {
-		devfsadm_print(debug_mid,  "agp_process: malloc failed\n");
-		di_devfs_path_free(devfspath);
-		free(I_path);
-		return (DEVFSADM_CONTINUE);
-	}
-
-	(void) strlcpy(p_path, devfspath, PATH_MAX);
-	(void) strlcat(p_path, ":", PATH_MAX);
-	(void) strlcat(p_path, minor_nm, PATH_MAX);
-	di_devfs_path_free(devfspath);
-
-	devfsadm_print(debug_mid, "agp_process: path %s\n", p_path);
-
-	for (i = 0; ; i++) {
-		if ((driver_name_table[i].driver_name == NULL) ||
-		    (strcmp(drv_nm, driver_name_table[i].driver_name) == 0)) {
-			index = driver_name_table[i].index;
-			break;
-		}
-	}
-	switch (index) {
-	case DRIVER_AGPPSEUDO:
-		devfsadm_print(debug_mid,
-		    "agp_process: psdeudo driver name\n");
-		name = "agpgart";
-		(void) snprintf(I_path, PATH_MAX, "%s", name);
-		devfsadm_print(debug_mid,
-		    "mklink %s -> %s\n", I_path, p_path);
-
-		(void) devfsadm_mklink(I_path, node, minor, 0);
-
-		free(I_path);
-		free(p_path);
-		return (DEVFSADM_CONTINUE);
-	case DRIVER_AGPTARGET:
-		devfsadm_print(debug_mid,
-		    "agp_process: target driver name\n");
-		rules[0] = agptarget_rules[0];
-		name = "agptarget";
-		break;
-	case DRIVER_CPUGART:
-		devfsadm_print(debug_mid,
-		    "agp_process: cpugart driver name\n");
-		rules[0] = cpugart_rules[0];
-		name = "cpugart";
-		break;
-	case DRIVER_AGPMASTER_DRM_I915:
-	case DRIVER_AGPMASTER_DRM_RADEON:
-	case DRIVER_AGPMASTER_VGATEXT:
-		devfsadm_print(debug_mid,
-		    "agp_process: agpmaster driver name\n");
-		rules[0] = agpmaster_rules[0];
-		name = "agpmaster";
-		break;
-	case DRIVER_UNKNOWN:
-		devfsadm_print(debug_mid,
-		    "agp_process: unknown driver name=%s\n", drv_nm);
-		free(I_path);
-		free(p_path);
-		return (DEVFSADM_CONTINUE);
-	}
-
-	if (devfsadm_enumerate_int(p_path, 0, &buf, rules, 1)) {
-		devfsadm_print(debug_mid, "agp_process: exit/coninue\n");
-		free(I_path);
-		free(p_path);
-		return (DEVFSADM_CONTINUE);
-	}
-
-
-	(void) snprintf(I_path, PATH_MAX, "agp/%s%s", name, buf);
-
-	devfsadm_print(debug_mid, "agp_process: p_path=%s buf=%s\n",
-	    p_path, buf);
-
-	free(buf);
-
-	devfsadm_print(debug_mid, "mklink %s -> %s\n", I_path, p_path);
-
-	(void) devfsadm_mklink(I_path, node, minor, 0);
-
-	free(p_path);
-	free(I_path);
-
-	return (DEVFSADM_CONTINUE);
-}
-
-static int
-drm_node(di_minor_t minor, di_node_t node)
-{
-	char *minor_nm, *drv_nm;
-	char *devfspath;
-	char *I_path, *p_path, *buf;
-	char *name = "card";
-
-	devfsadm_enumerate_t drm_rules[1] = {"^dri$/^card([0-9]+)$", 1,
-		MATCH_ALL };
-
-
-	minor_nm = di_minor_name(minor);
-	drv_nm = di_driver_name(node);
-	if ((minor_nm == NULL) || (drv_nm == NULL)) {
-		return (DEVFSADM_CONTINUE);
-	}
-
-	devfsadm_print(debug_mid, "drm_node: minor=%s node=%s type=%s\n",
-	    minor_nm, di_node_name(node), di_minor_nodetype(minor));
-
-	devfspath = di_devfs_path(node);
-	if (devfspath == NULL) {
-		devfsadm_print(debug_mid, "drm_node: devfspath is NULL\n");
-		return (DEVFSADM_CONTINUE);
-	}
-
-	I_path = (char *)malloc(PATH_MAX);
-
-	if (I_path == NULL) {
-		di_devfs_path_free(devfspath);
-		devfsadm_print(debug_mid,  "drm_node: malloc failed\n");
-		return (DEVFSADM_CONTINUE);
-	}
-
-	p_path = (char *)malloc(PATH_MAX);
-
-	if (p_path == NULL) {
-		devfsadm_print(debug_mid,  "drm_node: malloc failed\n");
-		di_devfs_path_free(devfspath);
-		free(I_path);
-		return (DEVFSADM_CONTINUE);
-	}
-
-	(void) strlcpy(p_path, devfspath, PATH_MAX);
-	(void) strlcat(p_path, ":", PATH_MAX);
-	(void) strlcat(p_path, minor_nm, PATH_MAX);
-	di_devfs_path_free(devfspath);
-
-	devfsadm_print(debug_mid, "drm_node: p_path %s\n", p_path);
-
-	if (devfsadm_enumerate_int(p_path, 0, &buf, drm_rules, 1)) {
-		free(p_path);
-		devfsadm_print(debug_mid, "drm_node: exit/coninue\n");
-		return (DEVFSADM_CONTINUE);
-	}
-	(void) snprintf(I_path, PATH_MAX, "dri/%s%s", name, buf);
-
-	devfsadm_print(debug_mid, "drm_node: p_path=%s buf=%s\n",
-	    p_path, buf);
-
-	free(buf);
-
-	devfsadm_print(debug_mid, "mklink %s -> %s\n", I_path, p_path);
-	(void) devfsadm_mklink(I_path, node, minor, 0);
-
-	free(p_path);
-	free(I_path);
-
-	return (0);
-}
-
 /*
  * /dev/mc/mc<chipid> -> /devices/.../pci1022,1102@<chipid+24>,2:mc-amd
  */