Parse MSI irqs

irq_parse.c

@@ -12,13 +12,17 @@
 #include "lub/list.h"
 #include "irq.h"
 
-int irqs_populate(lub_list_t *irqs)
+static int irqs_populate_pci(lub_list_t *irqs)
 {
 	DIR *dir;
+	DIR *msi;
 	struct dirent *dent;
+	struct dirent *ment;
 	char path[PATH_MAX];
+	int num;
 
 	/* Now we can parse PCI devices only */
+	/* Get info from /sys/bus/pci/devices */
 	dir = opendir(SYSFS_PCI_PATH);
 	if (!dir)
 		return -1;
@@ -26,8 +30,35 @@ int irqs_populate(lub_list_t *irqs)
 		if (!strcmp(dent->d_name, ".") ||
 			!strcmp(dent->d_name, ".."))
 			continue;
-		printf("entry: %s\n", dent->d_name);
+
+		/* Search for MSI IRQs. Since linux-3.2 */
+		sprintf(path, "%s/%s/msi_irqs", SYSFS_PCI_PATH, dent->d_name);
+		if ((msi = opendir(path))) {
+			while((ment = readdir(msi))) {
+				if (!strcmp(ment->d_name, ".") ||
+					!strcmp(ment->d_name, ".."))
+					continue;
+				num = strtol(ment->d_name, NULL, 10);
+				if (!num)
+					continue;
+				printf("%d\n", num);
+			}
+			closedir(msi);
+			continue;
+		}
+
+		/* Try to get IRQ number from irq file */
+		sprintf(path, "%s/%s/irq", SYSFS_PCI_PATH, dent->d_name);
 	}
+	closedir(dir);
+
+	return 0;
+}
+
+int irqs_populate(lub_list_t *irqs)
+{
+	irqs_populate_pci(irqs);
+//	irqs_populate_proc(irqs);
 
 	return 0;
 }