static int __init shm_driver_init(void)
{
int res, i;
struct device_node *np;
struct resource r;
struct proc_dir_entry *pent = NULL;
struct proc_dir_entry *pstat = NULL;
np = of_find_compatible_node(NULL, NULL, "mrvl,berlin-shm");
if (!np)
goto err_node;
res = of_address_to_resource(np, 0, &r);
if (res)
goto err_reg_device;
shm_base_cache = r.start;
shm_size_cache = resource_size(&r);
res = of_address_to_resource(np, 1, &r);
if (res)
goto err_reg_device;
shm_base_noncache = r.start;
shm_size_noncache = resource_size(&r);
of_node_put(np);
/* Figure out our device number. */
res =
register_chrdev_region(MKDEV(GALOIS_SHM_MAJOR, 0),
GALOIS_SHM_MINORS, SHM_DEVICE_NAME);
if (res < 0) {
shm_error("unable to get shm device major [%d]\n",
GALOIS_SHM_MAJOR);
goto err_reg_device;
}
shm_debug("register cdev device major [%d]\n", GALOIS_SHM_MAJOR);
/* Now setup cdevs. */
for (i = 0; i < ARRAY_SIZE(shm_driver_dev_list); i++) {
res = shm_driver_setup_cdev(shm_driver_dev_list[i].cdev,
GALOIS_SHM_MAJOR,
shm_driver_dev_list[i].minor,
shm_driver_dev_list[i].fops);
if (res) {
shm_error("shm_driver_setup_cdev failed in [%d].\n", i);
goto err_add_device;
}
shm_debug("setup cdevs device minor [%d]\n",
shm_driver_dev_list[i].minor);
}
/* add shm devices to sysfs */
shm_dev_class = class_create(THIS_MODULE, SHM_DEVICE_NAME);
if (IS_ERR(shm_dev_class)) {
shm_error("class_create failed.\n");
res = -ENODEV;
goto err_add_device;
}
for (i = 0; i < ARRAY_SIZE(shm_driver_dev_list); i++) {
device_create(shm_dev_class, NULL,
MKDEV(GALOIS_SHM_MAJOR,
shm_driver_dev_list[i].minor), NULL,
shm_driver_dev_list[i].name);
shm_debug("create device sysfs [%s]\n",
shm_driver_dev_list[i].name);
}
/* create shm cache device */
res =
shm_device_create(&shm_device, shm_base_cache, shm_size_cache,
SHM_DEVICE_THRESHOLD);
if (res != 0) {
shm_error("shm_device_create failed.\n");
goto err_add_device;
}
/* init shrinker */
shm_device->m_shrinker = shm_lowmem_shrink_killer;
/* create shm cache device */
res = shm_device_create(&shm_device_noncache, shm_base_noncache,
shm_size_noncache, SHM_DEVICE_THRESHOLD);
if (res != 0) {
shm_error("shm_device_create failed.\n");
goto err_add_device;
}
/* init shrinker */
shm_device_noncache->m_shrinker = NULL;
/* create shm kernel API, need map for noncache and cache device!!! */
res = MV_SHM_Init(shm_device_noncache, shm_device);
if (res != 0) {
shm_error("MV_SHM_Init failed !!!\n");
goto err_SHM_Init;
}
/* create shm device proc file */
shm_driver_procdir = proc_mkdir(SHM_DEVICE_NAME, NULL);
if (!shm_driver_procdir) {
shm_error(KERN_WARNING "Failed to mkdir /proc/%s\n", SHM_DEVICE_NAME);
return 0;
}
proc_create("meminfo", 0, shm_driver_procdir, &meminfo_proc_fops);
proc_create("baseinfo", 0, shm_driver_procdir, &baseinfo_proc_fops);
pent = create_proc_entry("detail", 0, shm_driver_procdir);
if (pent)
pent->proc_fops = &detail_proc_ops;
pstat = create_proc_entry("stat", 0, shm_driver_procdir);
if (pstat)
pstat->proc_fops = &shm_stat_file_ops;
task_free_register(&shm_task_nb);
shm_trace("shm_driver_init OK\n");
return 0;
err_SHM_Init:
shm_trace("shm_driver_init Undo ...\n");
shm_device_destroy(&shm_device);
shm_device_destroy(&shm_device_noncache);
/* del sysfs entries */
for (i = 0; i < ARRAY_SIZE(shm_driver_dev_list); i++) {
device_destroy(shm_dev_class,
MKDEV(GALOIS_SHM_MAJOR,
shm_driver_dev_list[i].minor));
shm_debug("delete device sysfs [%s]\n",
shm_driver_dev_list[i].name);
}
class_destroy(shm_dev_class);
err_add_device:
for (i = 0; i < ARRAY_SIZE(shm_driver_dev_list); i++) {
cdev_del(shm_driver_dev_list[i].cdev);
}
unregister_chrdev_region(MKDEV(GALOIS_SHM_MAJOR, 0), GALOIS_SHM_MINORS);
err_reg_device:
of_node_put(np);
err_node:
shm_trace("shm_driver_init failed !!! (%d)\n", res);
return res;
}
static int __init shm_driver_init(void)
{
int res, i;
/* Figure out our device number. */
res = register_chrdev_region(MKDEV(GALOIS_SHM_MAJOR, 0), GALOIS_SHM_MINORS, SHM_DEVICE_NAME);
if (res < 0) {
shm_error("unable to get shm device major [%d]\n", GALOIS_SHM_MAJOR);
goto err_reg_device;
}
shm_debug("register cdev device major [%d]\n", GALOIS_SHM_MAJOR);
/* Now setup cdevs. */
for (i = 0; i < ARRAY_SIZE(shm_driver_dev_list); i++) {
res = shm_driver_setup_cdev(shm_driver_dev_list[i].cdev,
GALOIS_SHM_MAJOR, shm_driver_dev_list[i].minor, shm_driver_dev_list[i].fops);
if (res) {
shm_error("shm_driver_setup_cdev failed in [%d].\n", i);
goto err_add_device;
}
shm_debug("setup cdevs device minor [%d]\n", shm_driver_dev_list[i].minor);
}
/* add shm devices to sysfs */
shm_dev_class = class_create(THIS_MODULE, SHM_DEVICE_NAME);
if (IS_ERR(shm_dev_class)) {
shm_error("class_create failed.\n");
res = -ENODEV;
goto err_add_device;
}
for (i = 0; i < ARRAY_SIZE(shm_driver_dev_list); i++) {
device_create(shm_dev_class, NULL,
MKDEV(GALOIS_SHM_MAJOR, shm_driver_dev_list[i].minor),
NULL, shm_driver_dev_list[i].name);
shm_debug("create device sysfs [%s]\n", shm_driver_dev_list[i].name);
}
/* create shm device*/
res = shm_device_create(&shm_device, shm_base, shm_size, SHM_DEVICE_THRESHOLD);
if (res != 0) {
shm_error("shm_device_create failed.\n");
goto err_add_device;
}
/* create shm kernel API */
res = MV_SHM_Init(shm_device);
if (res != 0) {
shm_error("MV_SHM_Init failed !!!\n");
goto err_SHM_Init;
}
/* create shm device proc file*/
shm_driver_procdir = proc_mkdir(SHM_DEVICE_NAME, NULL);
shm_driver_procdir->owner = THIS_MODULE;
create_proc_read_entry(SHM_DEVICE_PROCFILE_MEMINFO, 0, shm_driver_procdir, read_proc_meminfo, NULL);
create_proc_read_entry(SHM_DEVICE_PROCFILE_BASEINFO, 0, shm_driver_procdir, read_proc_baseinfo, NULL);
create_proc_read_entry(SHM_DEVICE_PROCFILE_DETAIL, 0, shm_driver_procdir, read_proc_detail, NULL);
shm_trace("shm_driver_init OK\n");
return 0;
err_SHM_Init:
shm_trace("shm_driver_init Undo ...\n");
shm_device_destroy(&shm_device);
/* del sysfs entries */
for (i = 0; i < ARRAY_SIZE(shm_driver_dev_list); i++) {
device_destroy(shm_dev_class, MKDEV(GALOIS_SHM_MAJOR, shm_driver_dev_list[i].minor));
shm_debug("delete device sysfs [%s]\n", shm_driver_dev_list[i].name);
}
class_destroy(shm_dev_class);
err_add_device:
for (i = 0; i < ARRAY_SIZE(shm_driver_dev_list); i++) {
cdev_del(shm_driver_dev_list[i].cdev);
}
unregister_chrdev_region(MKDEV(GALOIS_SHM_MAJOR, 0), GALOIS_SHM_MINORS);
err_reg_device:
shm_trace("shm_driver_init failed !!! (%d)\n", res);
return res;
}
