Add sysfs attribute dri_library_name on Linux. code in share-core/via_drv.c

is ok to be shared, it will be passive on BSD.

linux-core/drmP.h

@@ -544,6 +544,7 @@ struct drm_driver {
 				      int new);
 	int (*kernel_context_switch_unlock) (struct drm_device * dev);
 	int (*vblank_wait) (struct drm_device * dev, unsigned int *sequence);
+	int (*dri_library_name) (struct drm_device * dev, char * buf);
 
 	/**
 	 * Called by \c drm_device_is_agp.  Typically used to determine if a
@@ -987,6 +988,7 @@ extern struct drm_sysfs_class *drm_sysfs_create(struct module *owner,
 						char *name);
 extern void drm_sysfs_destroy(struct drm_sysfs_class *cs);
 extern struct class_device *drm_sysfs_device_add(struct drm_sysfs_class *cs,
+						 drm_head_t * head,
 						 dev_t dev,
 						 struct device *device,
 						 const char *fmt, ...);

linux-core/drm_stub.c

@@ -166,10 +166,9 @@ static int drm_get_head(drm_device_t * dev, drm_head_t * head)
 			}
 
 			head->dev_class = drm_sysfs_device_add(drm_class,
-							 MKDEV(DRM_MAJOR,
-							       minor),
-							 DRM_PCI_DEV(dev->pdev),
-							 "card%d", minor);
+						head, MKDEV(DRM_MAJOR, minor),
+						DRM_PCI_DEV(dev->pdev),
+						"card%d", minor);
 			if (IS_ERR(head->dev_class)) {
 				printk(KERN_ERR
 				       "DRM: Error sysfs_device_add.\n");

linux-core/drm_sysfs.c

@@ -16,6 +16,7 @@
 #include <linux/kdev_t.h>
 #include <linux/err.h>
 
+#include "drmP.h"
 #include "drm_core.h"
 
 struct drm_sysfs_class {
@@ -121,6 +122,18 @@ void drm_sysfs_destroy(struct drm_sysfs_class *cs)
 	class_unregister(&cs->class);
 }
 
+static ssize_t show_dri(struct class_device *class_device, char *buf)
+{
+	drm_device_t * dev = ((drm_head_t *)class_get_devdata(class_device))->dev;
+	if (dev->driver->dri_library_name)
+		return dev->driver->dri_library_name(dev, buf);
+	return snprintf(buf, PAGE_SIZE, "%s\n", dev->driver->pci_driver.name);
+}
+
+static struct class_device_attribute class_device_attrs[] = {
+	__ATTR(dri_library_name, S_IRUGO, show_dri, NULL),
+};
+
 /**
  * drm_sysfs_device_add - adds a class device to sysfs for a character driver
  * @cs: pointer to the struct drm_sysfs_class that this device should be registered to.
@@ -135,13 +148,13 @@ void drm_sysfs_destroy(struct drm_sysfs_class *cs)
  * Note: the struct drm_sysfs_class passed to this function must have previously been
  * created with a call to drm_sysfs_create().
  */
-struct class_device *drm_sysfs_device_add(struct drm_sysfs_class *cs, dev_t dev,
-					  struct device *device,
-					  const char *fmt, ...)
+struct class_device *drm_sysfs_device_add(struct drm_sysfs_class *cs,
+			drm_head_t * head, dev_t dev,
+			struct device *device, const char *fmt, ...)
 {
 	va_list args;
 	struct simple_dev *s_dev = NULL;
-	int retval;
+	int i, retval;
 
 	if ((cs == NULL) || (IS_ERR(cs))) {
 		retval = -ENODEV;
@@ -172,9 +185,14 @@ struct class_device *drm_sysfs_device_add(struct drm_sysfs_class *cs, dev_t dev,
 	list_add(&s_dev->node, &simple_dev_list);
 	spin_unlock(&simple_dev_list_lock);
 
+	class_set_devdata(&s_dev->class_dev, head);
+
+	for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++)
+		class_device_create_file(&s_dev->class_dev, &class_device_attrs[i]);
+
 	return &s_dev->class_dev;
 
-      error:
+error:
 	kfree(s_dev);
 	return ERR_PTR(retval);
 }
@@ -189,7 +207,7 @@ struct class_device *drm_sysfs_device_add(struct drm_sysfs_class *cs, dev_t dev,
 void drm_sysfs_device_remove(dev_t dev)
 {
 	struct simple_dev *s_dev = NULL;
-	int found = 0;
+	int i, found = 0;
 
 	spin_lock(&simple_dev_list_lock);
 	list_for_each_entry(s_dev, &simple_dev_list, node) {
@@ -201,6 +219,10 @@ void drm_sysfs_device_remove(dev_t dev)
 	if (found) {
 		list_del(&s_dev->node);
 		spin_unlock(&simple_dev_list_lock);
+
+		for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++)
+			class_device_remove_file(&s_dev->class_dev, &class_device_attrs[i]);
+
 		class_device_unregister(&s_dev->class_dev);
 	} else {
 		spin_unlock(&simple_dev_list_lock);

linux-core/i810_drv.c

@@ -70,6 +70,11 @@ static int version(drm_version_t * version)
 	return 0;
 }
 
+static int dri_library_name(struct drm_device * dev, char * buf)
+{
+	return snprintf(buf, PAGE_SIZE, "i830\n");
+}
+
 static struct pci_device_id pciidlist[] = {
 	i810_PCI_IDS
 };
@@ -90,6 +95,7 @@ static struct drm_driver driver = {
 	.dma_quiescent = i810_driver_dma_quiescent,
 	.get_map_ofs = drm_core_get_map_ofs,
 	.get_reg_ofs = drm_core_get_reg_ofs,
+	.dri_library_name = dri_library_name,
 	.postinit = postinit,
 	.version = version,
 	.ioctls = i810_ioctls,

linux-core/radeon_drv.c

@@ -62,6 +62,17 @@ static int version(drm_version_t * version)
 	return 0;
 }
 
+static int dri_library_name(struct drm_device * dev, char * buf)
+{
+	drm_radeon_private_t *dev_priv = dev->dev_private;
+	int family = dev_priv->flags & CHIP_FAMILY_MASK;
+
+	return snprintf(buf, PAGE_SIZE, "%s\n",
+		(family < CHIP_R200) ? "radeon" :
+		((family < CHIP_R300) ? "r200" :
+ 		"r300"));
+}
+
 static struct pci_device_id pciidlist[] = {
 	radeon_PCI_IDS
 };
@@ -83,6 +94,7 @@ static struct drm_driver driver = {
 	.pretakedown = radeon_driver_pretakedown,
 	.open_helper = radeon_driver_open_helper,
 	.vblank_wait = radeon_driver_vblank_wait,
+	.dri_library_name = dri_library_name,
 	.irq_preinstall = radeon_driver_irq_preinstall,
 	.irq_postinstall = radeon_driver_irq_postinstall,
 	.irq_uninstall = radeon_driver_irq_uninstall,

shared-core/via_drv.c

@@ -54,6 +54,11 @@ static int version(drm_version_t * version)
 	return 0;
 }
 
+static int dri_library_name(struct drm_device * dev, char * buf)
+{
+	return snprintf(buf, PAGE_SIZE, "unichrome\n");
+}
+
 static struct pci_device_id pciidlist[] = {
 	viadrv_PCI_IDS
 };
@@ -86,6 +91,7 @@ static struct drm_driver driver = {
 	.irq_uninstall = via_driver_irq_uninstall,
 	.irq_handler = via_driver_irq_handler,
 	.dma_quiescent = via_driver_dma_quiescent,
+	.dri_library_name = dri_library_name,
 	.reclaim_buffers = drm_core_reclaim_buffers,
 	.get_map_ofs = drm_core_get_map_ofs,
 	.get_reg_ofs = drm_core_get_reg_ofs,