1 files changed, 141 insertions, 152 deletions

diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c
index 47db4df37a6..69c61f392e6 100644
--- a/drivers/gpu/drm/drm_ioctl.c
+++ b/drivers/gpu/drm/drm_ioctl.c
@@ -33,10 +33,14 @@
  * OTHER DEALINGS IN THE SOFTWARE.
  */
 
-#include "drmP.h"
-#include "drm_core.h"
+#include <drm/drmP.h>
+#include <drm/drm_core.h>
 
-#include "linux/pci.h"
+#include <linux/pci.h>
+#include <linux/export.h>
+#ifdef CONFIG_X86
+#include <asm/mtrr.h>
+#endif
 
 /**
  * Get the bus id.
@@ -68,9 +72,6 @@ static void
 drm_unset_busid(struct drm_device *dev,
 		struct drm_master *master)
 {
-	kfree(dev->devname);
-	dev->devname = NULL;
-
 	kfree(master->unique);
 	master->unique = NULL;
 	master->unique_len = 0;
@@ -89,14 +90,15 @@ drm_unset_busid(struct drm_device *dev,
  * Copies the bus id from userspace into drm_device::unique, and verifies that
  * it matches the device this DRM is attached to (EINVAL otherwise).  Deprecated
  * in interface version 1.1 and will return EBUSY when setversion has requested
- * version 1.1 or greater.
+ * version 1.1 or greater. Also note that KMS is all version 1.1 and later and
+ * UMS was only ever supported on pci devices.
  */
 int drm_setunique(struct drm_device *dev, void *data,
 		  struct drm_file *file_priv)
 {
 	struct drm_unique *u = data;
 	struct drm_master *master = file_priv->master;
-	int domain, bus, slot, func, ret;
+	int ret;
 
 	if (master->unique_len || master->unique)
 		return -EBUSY;
@@ -104,50 +106,15 @@ int drm_setunique(struct drm_device *dev, void *data,
 	if (!u->unique_len || u->unique_len > 1024)
 		return -EINVAL;
 
-	master->unique_len = u->unique_len;
-	master->unique_size = u->unique_len + 1;
-	master->unique = kmalloc(master->unique_size, GFP_KERNEL);
-	if (!master->unique) {
-		ret = -ENOMEM;
-		goto err;
-	}
-
-	if (copy_from_user(master->unique, u->unique, master->unique_len)) {
-		ret = -EFAULT;
-		goto err;
-	}
-
-	master->unique[master->unique_len] = '\0';
-
-	dev->devname = kmalloc(strlen(dev->driver->pci_driver.name) +
-			       strlen(master->unique) + 2, GFP_KERNEL);
-	if (!dev->devname) {
-		ret = -ENOMEM;
-		goto err;
-	}
-
-	sprintf(dev->devname, "%s@%s", dev->driver->pci_driver.name,
-		master->unique);
+	if (drm_core_check_feature(dev, DRIVER_MODESET))
+		return 0;
 
-	/* Return error if the busid submitted doesn't match the device's actual
-	 * busid.
-	 */
-	ret = sscanf(master->unique, "PCI:%d:%d:%d", &bus, &slot, &func);
-	if (ret != 3) {
-		ret = -EINVAL;
-		goto err;
-	}
-
-	domain = bus >> 8;
-	bus &= 0xff;
+	if (WARN_ON(!dev->pdev))
+		return -EINVAL;
 
-	if ((domain != drm_get_pci_domain(dev)) ||
-	    (bus != dev->pdev->bus->number) ||
-	    (slot != PCI_SLOT(dev->pdev->devfn)) ||
-	    (func != PCI_FUNC(dev->pdev->devfn))) {
-		ret = -EINVAL;
+	ret = drm_pci_set_unique(dev, master, u);
+	if (ret)
 		goto err;
-	}
 
 	return 0;
 
@@ -159,77 +126,30 @@ err:
 static int drm_set_busid(struct drm_device *dev, struct drm_file *file_priv)
 {
 	struct drm_master *master = file_priv->master;
-	int len, ret;
+	int ret;
 
 	if (master->unique != NULL)
 		drm_unset_busid(dev, master);
 
-	if (drm_core_check_feature(dev, DRIVER_USE_PLATFORM_DEVICE)) {
-		master->unique_len = 10 + strlen(dev->platformdev->name);
-		master->unique = kmalloc(master->unique_len + 1, GFP_KERNEL);
-
-		if (master->unique == NULL)
-			return -ENOMEM;
-
-		len = snprintf(master->unique, master->unique_len,
-			"platform:%s", dev->platformdev->name);
-
-		if (len > master->unique_len) {
-			DRM_ERROR("Unique buffer overflowed\n");
-			ret = -EINVAL;
-			goto err;
-		}
-
-		dev->devname =
-			kmalloc(strlen(dev->platformdev->name) +
-				master->unique_len + 2, GFP_KERNEL);
-
-		if (dev->devname == NULL) {
-			ret = -ENOMEM;
-			goto err;
+	if (dev->driver->bus && dev->driver->bus->set_busid) {
+		ret = dev->driver->bus->set_busid(dev, master);
+		if (ret) {
+			drm_unset_busid(dev, master);
+			return ret;
 		}
-
-		sprintf(dev->devname, "%s@%s", dev->platformdev->name,
-			master->unique);
-
 	} else {
-		master->unique_len = 40;
-		master->unique_size = master->unique_len;
-		master->unique = kmalloc(master->unique_size, GFP_KERNEL);
-		if (master->unique == NULL)
-			return -ENOMEM;
-
-		len = snprintf(master->unique, master->unique_len,
-			"pci:%04x:%02x:%02x.%d",
-			drm_get_pci_domain(dev),
-			dev->pdev->bus->number,
-			PCI_SLOT(dev->pdev->devfn),
-			PCI_FUNC(dev->pdev->devfn));
-		if (len >= master->unique_len) {
-			DRM_ERROR("buffer overflow");
-			ret = -EINVAL;
-			goto err;
-		} else
-			master->unique_len = len;
-
-		dev->devname =
-			kmalloc(strlen(dev->driver->pci_driver.name) +
-				master->unique_len + 2, GFP_KERNEL);
-
-		if (dev->devname == NULL) {
-			ret = -ENOMEM;
-			goto err;
-		}
-
-		sprintf(dev->devname, "%s@%s", dev->driver->pci_driver.name,
-			master->unique);
+		if (WARN(dev->unique == NULL,
+			 "No drm_bus.set_busid() implementation provided by "
+			 "%ps. Use drm_dev_set_unique() to set the unique "
+			 "name explicitly.", dev->driver))
+			return -EINVAL;
+
+		master->unique = kstrdup(dev->unique, GFP_KERNEL);
+		if (master->unique)
+			master->unique_len = strlen(dev->unique);
 	}
 
 	return 0;
-
-err:
-	drm_unset_busid(dev, master);
-	return ret;
 }
 
 /**
@@ -255,14 +175,11 @@ int drm_getmap(struct drm_device *dev, void *data,
 	int i;
 
 	idx = map->offset;
-
-	mutex_lock(&dev->struct_mutex);
-	if (idx < 0) {
-		mutex_unlock(&dev->struct_mutex);
+	if (idx < 0)
 		return -EINVAL;
-	}
 
 	i = 0;
+	mutex_lock(&dev->struct_mutex);
 	list_for_each(list, &dev->maplist) {
 		if (i == idx) {
 			r_list = list_entry(list, struct drm_map_list, head);
@@ -280,7 +197,17 @@ int drm_getmap(struct drm_device *dev, void *data,
 	map->type = r_list->map->type;
 	map->flags = r_list->map->flags;
 	map->handle = (void *)(unsigned long) r_list->user_token;
-	map->mtrr = r_list->map->mtrr;
+
+#ifdef CONFIG_X86
+	/*
+	 * There appears to be exactly one user of the mtrr index: dritest.
+	 * It's easy enough to keep it working on non-PAT systems.
+	 */
+	map->mtrr = phys_wc_to_mtrr_index(r_list->map->mtrr);
+#else
+	map->mtrr = -1;
+#endif
+
 	mutex_unlock(&dev->struct_mutex);
 
 	return 0;
@@ -303,29 +230,30 @@ int drm_getclient(struct drm_device *dev, void *data,
 		  struct drm_file *file_priv)
 {
 	struct drm_client *client = data;
-	struct drm_file *pt;
-	int idx;
-	int i;
-
-	idx = client->idx;
-	mutex_lock(&dev->struct_mutex);
 
-	i = 0;
-	list_for_each_entry(pt, &dev->filelist, lhead) {
-		if (i++ >= idx) {
-			client->auth = pt->authenticated;
-			client->pid = pt->pid;
-			client->uid = pt->uid;
-			client->magic = pt->magic;
-			client->iocs = pt->ioctl_count;
-			mutex_unlock(&dev->struct_mutex);
-
-			return 0;
-		}
+	/*
+	 * Hollowed-out getclient ioctl to keep some dead old drm tests/tools
+	 * not breaking completely. Userspace tools stop enumerating one they
+	 * get -EINVAL, hence this is the return value we need to hand back for
+	 * no clients tracked.
+	 *
+	 * Unfortunately some clients (*cough* libva *cough*) use this in a fun
+	 * attempt to figure out whether they're authenticated or not. Since
+	 * that's the only thing they care about, give it to the directly
+	 * instead of walking one giant list.
+	 */
+	if (client->idx == 0) {
+		client->auth = file_priv->authenticated;
+		client->pid = pid_vnr(file_priv->pid);
+		client->uid = from_kuid_munged(current_user_ns(),
+					       file_priv->uid);
+		client->magic = 0;
+		client->iocs = 0;
+
+		return 0;
+	} else {
+		return -EINVAL;
 	}
-	mutex_unlock(&dev->struct_mutex);
-
-	return -EINVAL;
 }
 
 /**
@@ -342,24 +270,87 @@ int drm_getstats(struct drm_device *dev, void *data,
 		 struct drm_file *file_priv)
 {
 	struct drm_stats *stats = data;
-	int i;
 
+	/* Clear stats to prevent userspace from eating its stack garbage. */
 	memset(stats, 0, sizeof(*stats));
 
-	mutex_lock(&dev->struct_mutex);
+	return 0;
+}
 
-	for (i = 0; i < dev->counters; i++) {
-		if (dev->types[i] == _DRM_STAT_LOCK)
-			stats->data[i].value =
-			    (file_priv->master->lock.hw_lock ? file_priv->master->lock.hw_lock->lock : 0);
+/**
+ * Get device/driver capabilities
+ */
+int drm_getcap(struct drm_device *dev, void *data, struct drm_file *file_priv)
+{
+	struct drm_get_cap *req = data;
+
+	req->value = 0;
+	switch (req->capability) {
+	case DRM_CAP_DUMB_BUFFER:
+		if (dev->driver->dumb_create)
+			req->value = 1;
+		break;
+	case DRM_CAP_VBLANK_HIGH_CRTC:
+		req->value = 1;
+		break;
+	case DRM_CAP_DUMB_PREFERRED_DEPTH:
+		req->value = dev->mode_config.preferred_depth;
+		break;
+	case DRM_CAP_DUMB_PREFER_SHADOW:
+		req->value = dev->mode_config.prefer_shadow;
+		break;
+	case DRM_CAP_PRIME:
+		req->value |= dev->driver->prime_fd_to_handle ? DRM_PRIME_CAP_IMPORT : 0;
+		req->value |= dev->driver->prime_handle_to_fd ? DRM_PRIME_CAP_EXPORT : 0;
+		break;
+	case DRM_CAP_TIMESTAMP_MONOTONIC:
+		req->value = drm_timestamp_monotonic;
+		break;
+	case DRM_CAP_ASYNC_PAGE_FLIP:
+		req->value = dev->mode_config.async_page_flip;
+		break;
+	case DRM_CAP_CURSOR_WIDTH:
+		if (dev->mode_config.cursor_width)
+			req->value = dev->mode_config.cursor_width;
 		else
-			stats->data[i].value = atomic_read(&dev->counts[i]);
-		stats->data[i].type = dev->types[i];
+			req->value = 64;
+		break;
+	case DRM_CAP_CURSOR_HEIGHT:
+		if (dev->mode_config.cursor_height)
+			req->value = dev->mode_config.cursor_height;
+		else
+			req->value = 64;
+		break;
+	default:
+		return -EINVAL;
 	}
+	return 0;
+}
 
-	stats->count = dev->counters;
-
-	mutex_unlock(&dev->struct_mutex);
+/**
+ * Set device/driver capabilities
+ */
+int
+drm_setclientcap(struct drm_device *dev, void *data, struct drm_file *file_priv)
+{
+	struct drm_set_client_cap *req = data;
+
+	switch (req->capability) {
+	case DRM_CLIENT_CAP_STEREO_3D:
+		if (req->value > 1)
+			return -EINVAL;
+		file_priv->stereo_allowed = req->value;
+		break;
+	case DRM_CLIENT_CAP_UNIVERSAL_PLANES:
+		if (!drm_universal_planes)
+			return -EINVAL;
+		if (req->value > 1)
+			return -EINVAL;
+		file_priv->universal_planes = req->value;
+		break;
+	default:
+		return -EINVAL;
+	}
 
 	return 0;
 }
@@ -407,9 +398,6 @@ int drm_setversion(struct drm_device *dev, void *data, struct drm_file *file_pri
 			retcode = -EINVAL;
 			goto done;
 		}
-
-		if (dev->driver->set_version)
-			dev->driver->set_version(dev, sv);
 	}
 
 done:
@@ -428,3 +416,4 @@ int drm_noop(struct drm_device *dev, void *data,
 	DRM_DEBUG("\n");
 	return 0;
 }
+EXPORT_SYMBOL(drm_noop);