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Diffstat (limited to 'linux-core/drm_stub.c')
-rw-r--r--linux-core/drm_stub.c395
1 files changed, 155 insertions, 240 deletions
diff --git a/linux-core/drm_stub.c b/linux-core/drm_stub.c
index c70de9bb..3d9ade35 100644
--- a/linux-core/drm_stub.c
+++ b/linux-core/drm_stub.c
@@ -33,22 +33,14 @@
#include "drmP.h"
-static unsigned int cards_limit = 16; /* Enough for one machine */
-static unsigned int debug = 0; /* 1 to enable debug output */
+#define DRM_STUB_MAXCARDS 16 /* Enough for one machine */
-MODULE_AUTHOR( DRIVER_AUTHOR );
-MODULE_DESCRIPTION( DRIVER_DESC );
-MODULE_LICENSE("GPL and additional rights");
-MODULE_PARM_DESC(cards_limit, "Maximum number of graphics cards");
-MODULE_PARM_DESC(debug, "Enable debug output");
-
-#ifdef module_param
-module_param(cards_limit, int, 0444);
-module_param(debug, int, 0644);
-#endif
-
-MODULE_AUTHOR( DRIVER_AUTHOR );
-drm_global_t *DRM(global);
+/** Stub list. One for each minor. */
+static struct drm_stub_list {
+ const char *name;
+ struct file_operations *fops; /**< file operations */
+ struct proc_dir_entry *dev_root; /**< proc directory entry */
+} *DRM(stub_list);
/**
* File \c open operation.
@@ -59,24 +51,15 @@ drm_global_t *DRM(global);
* Puts the drm_stub_list::fops corresponding to the device minor number into
* \p filp, call the \c open method, and restore the file operations.
*/
-static int stub_open(struct inode *inode, struct file *filp)
+static int DRM(stub_open)(struct inode *inode, struct file *filp)
{
- drm_device_t *dev = NULL;
- int minor = iminor(inode);
- int err = -ENODEV;
+ int minor = iminor(inode);
+ int err = -ENODEV;
struct file_operations *old_fops;
-
- DRM_DEBUG("\n");
-
- if (!((minor >= 0) && (minor < DRM(global)->cards_limit)))
- return -ENODEV;
-
- dev = DRM(global)->minors[minor].dev;
- if (!dev)
- return -ENODEV;
- old_fops = filp->f_op;
- filp->f_op = fops_get(dev->fops);
+ if (!DRM(stub_list) || !DRM(stub_list)[minor].fops) return -ENODEV;
+ old_fops = filp->f_op;
+ filp->f_op = fops_get(DRM(stub_list)[minor].fops);
if (filp->f_op->open && (err = filp->f_op->open(inode, filp))) {
fops_put(filp->f_op);
filp->f_op = fops_get(old_fops);
@@ -89,24 +72,23 @@ static int stub_open(struct inode *inode, struct file *filp)
/** File operations structure */
static struct file_operations DRM(stub_fops) = {
.owner = THIS_MODULE,
- .open = stub_open
+ .open = DRM(stub_open)
};
#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,0)
-static int drm_hotplug (struct class_device *cdev, char **envp, int num_envp,
+static int drm_hotplug (struct class_device *dev, char **envp, int num_envp,
char *buffer, int buffer_size)
{
- drm_device_t *dev;
struct pci_dev *pdev;
char *scratch;
int i = 0;
int length = 0;
-
+
DRM_DEBUG("\n");
- if (!cdev)
+ if (!dev)
return -ENODEV;
- pdev = to_pci_dev(cdev->dev);
+ pdev = to_pci_dev(dev->dev);
if (!pdev)
return -ENODEV;
@@ -145,17 +127,19 @@ static int drm_hotplug (struct class_device *cdev, char **envp, int num_envp,
return -ENOMEM;
++length;
scratch += length;
-
- dev = pci_get_drvdata(pdev);
- if (dev) {
+#if 0
+ drm_device_t *ddev;
+ ddev = pci_get_drvdata(pdev);
+ if (ddev) {
envp[i++] = scratch;
length += snprintf (scratch, buffer_size - length,
- "RESET=%s", (dev->need_reset ? "true" : "false"));
+ "RESET=%s", (ddev->need_reset ? "true" : "false"));
if ((buffer_size - length <= 0) || (i >= num_envp))
return -ENOMEM;
}
+#endif
envp[i] = 0;
-
+
return 0;
}
#endif
@@ -172,105 +156,33 @@ static int drm_hotplug (struct class_device *cdev, char **envp, int num_envp,
* empty entry and initialize it to the given parameters, and create the proc
* init entry via proc_init().
*/
-static int get_minor(struct pci_dev *pdev, const struct pci_device_id *ent)
+static int DRM(stub_getminor)(const char *name, struct file_operations *fops,
+ drm_device_t *dev)
{
- struct class_device *dev_class;
- drm_device_t *dev;
- int ret;
- int minor;
- drm_minor_t *minors = &DRM(global)->minors[0];
-
- DRM_DEBUG("\n");
-
- for (minor = 0; minor < DRM(global)->cards_limit; minor++, minors++) {
- if (minors->class == DRM_MINOR_FREE) {
-
- DRM_DEBUG("assigning minor %d\n", minor);
- dev = DRM(calloc)(1, sizeof(*dev), DRM_MEM_STUB);
- if(!dev)
- return -ENOMEM;
-
- *minors = (drm_minor_t){.dev = NULL, .class = DRM_MINOR_PRIMARY};
- dev->minor = minor;
- if ((ret = DRM(fill_in_dev)(dev, pdev, ent))) {
- printk (KERN_ERR "DRM: Fill_in_dev failed.\n");
- goto err_g1;
- }
- if ((ret = DRM(proc_init)(dev, minor, DRM(global)->proc_root, &minors->dev_root))) {
- printk (KERN_ERR "DRM: Failed to initialize /proc/dri.\n");
- goto err_g1;
- }
- if (!DRM(fb_loaded)) { /* set this before device_add hotplug uses it */
- pci_set_drvdata(pdev, dev);
- pci_request_regions(pdev, DRIVER_NAME);
- pci_enable_device(pdev);
- }
- dev_class = class_simple_device_add(DRM(global)->drm_class,
- MKDEV(DRM_MAJOR, minor), &pdev->dev, "card%d", minor);
- if (IS_ERR(dev_class)) {
- printk (KERN_ERR "DRM: Error class_simple_device_add.\n");
- ret = PTR_ERR(dev_class);
- goto err_g2;
- }
+ int i;
- DRM_DEBUG("new primary minor assigned %d\n", minor);
- return 0;
+ if (!DRM(stub_list)) {
+ DRM(stub_list) = DRM(alloc)(sizeof(*DRM(stub_list))
+ * DRM_STUB_MAXCARDS, DRM_MEM_STUB);
+ if(!DRM(stub_list)) return -1;
+ for (i = 0; i < DRM_STUB_MAXCARDS; i++) {
+ DRM(stub_list)[i].name = NULL;
+ DRM(stub_list)[i].fops = NULL;
}
}
- DRM_ERROR("out of minors\n");
- return -ENOMEM;
-err_g2:
- if (!DRM(fb_loaded)) {
- pci_set_drvdata(pdev, NULL);
- pci_release_regions(pdev);
- pci_disable_device(pdev);
- }
- DRM(proc_cleanup)(minor, DRM(global)->proc_root, minors->dev_root);
-err_g1:
- *minors = (drm_minor_t){.dev = NULL, .class = DRM_MINOR_FREE};
- DRM(free)(dev, sizeof(*dev), DRM_MEM_STUB);
- return ret;
-}
-
-int DRM(get_secondary_minor)(drm_device_t *dev, drm_minor_t **sec_minor)
-{
- drm_minor_t *minors = &DRM(global)->minors[0];
- struct class_device *dev_class;
- int ret;
- int minor;
-
- DRM_DEBUG("\n");
-
- for (minor = 0; minor < DRM(global)->cards_limit; minor++, minors++) {
- if (minors->class == DRM_MINOR_FREE) {
-
- *minors = (drm_minor_t){.dev = dev, .class = DRM_MINOR_SECONDARY};
- if ((ret = DRM(proc_init)(dev, minor, DRM(global)->proc_root, &minors->dev_root))) {
- printk (KERN_ERR "DRM: Failed to initialize /proc/dri.\n");
- goto err_g1;
- }
-
- dev_class = class_simple_device_add(DRM(global)->drm_class,
- MKDEV(DRM_MAJOR, minor), &dev->pdev->dev, "card%d", minor);
- if (IS_ERR(dev_class)) {
- printk (KERN_ERR "DRM: Error class_simple_device_add.\n");
- ret = PTR_ERR(dev_class);
- goto err_g2;
- }
- *sec_minor = minors;
-
- DRM_DEBUG("new secondary minor assigned %d\n", minor);
- return 0;
+ for (i = 0; i < DRM_STUB_MAXCARDS; i++) {
+ if (!DRM(stub_list)[i].fops) {
+ DRM(stub_list)[i].name = name;
+ DRM(stub_list)[i].fops = fops;
+ DRM(proc_init)(dev, i, DRM(stub_info).proc_root,
+ &DRM(stub_list)[i].dev_root);
+ (*DRM(stub_info).info_count)++;
+ DRM_DEBUG("info count increased %d\n", *DRM(stub_info).info_count);
+
+ return i;
}
}
- DRM_ERROR("out of minors\n");
- return -ENOMEM;
-err_g2:
- DRM(proc_cleanup)(minor, DRM(global)->proc_root, minors->dev_root);
-err_g1:
- *minors = (drm_minor_t){.dev = NULL, .class = DRM_MINOR_FREE};
- DRM(free)(dev, sizeof(*dev), DRM_MEM_STUB);
- return ret;
+ return -1;
}
/**
@@ -283,53 +195,31 @@ err_g1:
* "drm" data, otherwise unregisters the "drm" data, frees the stub list and
* unregisters the character device.
*/
-int DRM(put_minor)(drm_device_t *dev)
+static int DRM(stub_putminor)(int minor)
{
- drm_minor_t *minors = &DRM(global)->minors[dev->minor];
- int i;
-
- DRM_DEBUG("release primary minor %d\n", dev->minor);
-
- DRM(proc_cleanup)(dev->minor, DRM(global)->proc_root, minors->dev_root);
- class_simple_device_remove(MKDEV(DRM_MAJOR, dev->minor));
+ if (minor < 0 || minor >= DRM_STUB_MAXCARDS) return -1;
+ DRM(stub_list)[minor].name = NULL;
+ DRM(stub_list)[minor].fops = NULL;
+ DRM(proc_cleanup)(minor, DRM(stub_info).proc_root,
+ DRM(stub_list)[minor].dev_root);
- *minors = (drm_minor_t){.dev = NULL, .class = DRM_MINOR_FREE};
- DRM(free)(dev, sizeof(*dev), DRM_MEM_STUB);
+ (*DRM(stub_info).info_count)--;
- /* if any device pointers are non-NULL we are not the last module */
- for (i = 0; i < DRM(global)->cards_limit; i++) {
- if (DRM(global)->minors[i].class != DRM_MINOR_FREE) {
- DRM_DEBUG("inter_module_put called\n");
+ if ((*DRM(stub_info).info_count) != 0) {
+ if (DRM(numdevs) == 0) {
+ DRM_DEBUG("inter_module_put called %d\n", *DRM(stub_info).info_count);
inter_module_put("drm");
- return 0;
}
+ } else {
+ DRM_DEBUG("unregistering inter_module \n");
+ inter_module_unregister("drm");
+ DRM(free)(DRM(stub_list),
+ sizeof(*DRM(stub_list)) * DRM_STUB_MAXCARDS,
+ DRM_MEM_STUB);
+ remove_proc_entry("dri", NULL);
+ class_simple_destroy(DRM(stub_info).drm_class);
+ unregister_chrdev(DRM_MAJOR, "drm");
}
- DRM_DEBUG("unregistering inter_module \n");
- inter_module_unregister("drm");
- remove_proc_entry("dri", NULL);
- class_simple_destroy(DRM(global)->drm_class);
- cdev_del(&DRM(global)->drm_cdev);
- unregister_chrdev_region(MKDEV(DRM_MAJOR, 0), DRM_MAX_MINOR);
-
- DRM(free)(DRM(global)->minors, sizeof(*DRM(global)->minors) *
- DRM(global)->cards_limit, DRM_MEM_STUB);
- DRM(free)(DRM(global), sizeof(*DRM(global)), DRM_MEM_STUB);
- DRM(global) = NULL;
-
- return 0;
-}
-
-int DRM(put_secondary_minor)(drm_minor_t *sec_minor)
-{
- int minor = sec_minor - &DRM(global)->minors[0];
-
- DRM_DEBUG("release secondary minor %d\n", minor);
-
- DRM(proc_cleanup)(minor, DRM(global)->proc_root, sec_minor->dev_root);
- class_simple_device_remove(MKDEV(DRM_MAJOR, minor));
-
- *sec_minor = (drm_minor_t){.dev = NULL, .class = DRM_MINOR_FREE};
-
return 0;
}
@@ -347,79 +237,104 @@ int DRM(put_secondary_minor)(drm_minor_t *sec_minor)
*
* Finally calls stub_info::info_register.
*/
-int DRM(probe)(struct pci_dev *pdev, const struct pci_device_id *ent)
+int DRM(stub_register)(const char *name, struct file_operations *fops,
+ drm_device_t *dev)
{
- dev_t dev = MKDEV(DRM_MAJOR, 0);
- drm_global_t *global;
- int ret = -ENOMEM;
+ struct drm_stub_info *i = NULL;
+ int ret1;
+ int ret2;
DRM_DEBUG("\n");
- /* use the inter_module_get to check - as if the same module
- registers chrdev twice it succeeds */
- global = (drm_global_t *)inter_module_get("drm");
- if (global) {
- DRM(global) = global;
- global = NULL;
- } else {
- DRM_DEBUG("first probe\n");
-
- global = DRM(calloc)(1, sizeof(*global), DRM_MEM_STUB);
- if(!global)
- return -ENOMEM;
+ /* if we are registering a second device we don't need to worry
+ about inter module get/put and other things as they've been
+ done already */
+ if (DRM(numdevs) == 0) {
+ /* use the inter_module_get to check - as if the same module
+ registers chrdev twice it succeeds */
+ i = (struct drm_stub_info *)inter_module_get("drm");
+ if (i) {
+ /* Already registered */
+ DRM(stub_info).info_register = i->info_register;
+ DRM(stub_info).info_unregister = i->info_unregister;
+ DRM(stub_info).drm_class = i->drm_class;
+ DRM(stub_info).info_count = i->info_count;
+ DRM_DEBUG("already registered %d\n", *i->info_count);
+ } else if (*DRM(stub_info).info_count == 0) {
+
+ ret1 = register_chrdev(DRM_MAJOR, "drm", &DRM(stub_fops));
+ if (ret1 < 0) {
+ printk (KERN_ERR "Error registering drm major number.\n");
+ return ret1;
+ }
- global->cards_limit = (cards_limit < DRM_MAX_MINOR + 1 ? cards_limit : DRM_MAX_MINOR + 1);
- global->minors = DRM(calloc)(global->cards_limit,
- sizeof(*global->minors), DRM_MEM_STUB);
- if(!global->minors)
- goto err_p1;
+ DRM(stub_info).drm_class = class_simple_create(THIS_MODULE, "drm");
+ if (IS_ERR(DRM(stub_info).drm_class)) {
+ printk (KERN_ERR "Error creating drm class.\n");
+ unregister_chrdev(DRM_MAJOR, "drm");
+ return PTR_ERR(DRM(stub_info).drm_class);
+ }
+ class_simple_set_hotplug(DRM(stub_info).drm_class, drm_hotplug);
- if (register_chrdev_region(dev, DRM_MAX_MINOR, "drm"))
- goto err_p1;
-
- strncpy(global->drm_cdev.kobj.name, "drm", KOBJ_NAME_LEN);
- global->drm_cdev.owner = THIS_MODULE;
- cdev_init(&global->drm_cdev, &DRM(stub_fops));
- if (cdev_add(&global->drm_cdev, dev, DRM_MAX_MINOR)) {
- kobject_put(&global->drm_cdev.kobj);
- printk (KERN_ERR "DRM: Error registering drm major number.\n");
- goto err_p2;
- }
+ DRM_DEBUG("calling inter_module_register\n");
+ inter_module_register("drm", THIS_MODULE, &DRM(stub_info));
- global->drm_class = class_simple_create(THIS_MODULE, "drm");
- if (IS_ERR(global->drm_class)) {
- printk (KERN_ERR "DRM: Error creating drm class.\n");
- ret = PTR_ERR(global->drm_class);
- goto err_p3;
+ DRM(stub_info).proc_root = create_proc_entry("dri", S_IFDIR, NULL);
+ if (!DRM(stub_info).proc_root) {
+ DRM_ERROR("Cannot create /proc/dri\n");
+ inter_module_unregister("drm");
+ unregister_chrdev(DRM_MAJOR, "drm");
+ class_simple_destroy(DRM(stub_info).drm_class);
+ return -1;
+ }
+
}
- class_simple_set_hotplug(global->drm_class, drm_hotplug);
-
- global->proc_root = create_proc_entry("dri", S_IFDIR, NULL);
- if (!global->proc_root) {
- DRM_ERROR("Cannot create /proc/dri\n");
- ret = -1;
- goto err_p4;
+ } else
+ DRM_DEBUG("already retrieved inter_module information\n");
+
+ if (DRM(stub_info).info_register) {
+ ret2 = DRM(stub_info).info_register(name, fops, dev);
+ if (ret2 < 0) {
+ if (DRM(numdevs) == 0 && !i) {
+ inter_module_unregister("drm");
+ unregister_chrdev(DRM_MAJOR, "drm");
+ class_simple_destroy(DRM(stub_info).drm_class);
+ remove_proc_entry("dri", NULL);
+ DRM_DEBUG("info_register failed, deregistered everything\n");
+ }
+ DRM_DEBUG("info_register failed\n");
+ return ret2;
}
- DRM_DEBUG("calling inter_module_register\n");
- inter_module_register("drm", THIS_MODULE, global);
-
- DRM(global) = global;
- }
- if ((ret = get_minor(pdev, ent))) {
- if (global)
- goto err_p4;
- return ret;
+ class_simple_device_add(DRM(stub_info).drm_class,
+ MKDEV(DRM_MAJOR, ret2), &dev->pdev->dev, "card%d", ret2);
+ return ret2;
}
- return 0;
-err_p4:
- class_simple_destroy(global->drm_class);
-err_p3:
- cdev_del(&global->drm_cdev);
- unregister_chrdev_region(dev, DRM_MAX_MINOR);
-err_p2:
- DRM(free)(global->minors, sizeof(*global->minors) * global->cards_limit, DRM_MEM_STUB);
-err_p1:
- DRM(free)(global, sizeof(*global), DRM_MEM_STUB);
- DRM(global) = NULL;
- return ret;
+ return -1;
}
+
+/**
+ * Unregister.
+ *
+ * \param minor
+ *
+ * Calls drm_stub_info::unregister.
+ */
+int DRM(stub_unregister)(int minor)
+{
+ DRM_DEBUG("%d\n", minor);
+ class_simple_device_remove(MKDEV(DRM_MAJOR, minor));
+ if (DRM(stub_info).info_unregister)
+ return DRM(stub_info).info_unregister(minor);
+ return -1;
+}
+
+int DRM(stub_count);
+
+/** Stub information */
+struct drm_stub_info DRM(stub_info) = {
+ .info_register = DRM(stub_getminor),
+ .info_unregister = DRM(stub_putminor),
+ .drm_class = NULL,
+ .info_count = &DRM(stub_count),
+ .proc_root = NULL,
+};