#include <linux/file.h>
#include <linux/mount.h>
#include <linux/cdev.h>
+#include <linux/idr.h>
#include <asm/uaccess.h>
-#include "ucm.h"
+#include <rdma/ib_cm.h>
+#include <rdma/ib_user_cm.h>
MODULE_AUTHOR("Libor Michalek");
MODULE_DESCRIPTION("InfiniBand userspace Connection Manager access");
MODULE_LICENSE("Dual BSD/GPL");
-static int ucm_debug_level;
+struct ib_ucm_device {
+ int devnum;
+ struct cdev dev;
+ struct class_device class_dev;
+ struct ib_device *ib_dev;
+};
+
+struct ib_ucm_file {
+ struct semaphore mutex;
+ struct file *filp;
+ struct ib_ucm_device *device;
+
+ struct list_head ctxs;
+ struct list_head events;
+ wait_queue_head_t poll_wait;
+};
+
+struct ib_ucm_context {
+ int id;
+ wait_queue_head_t wait;
+ atomic_t ref;
+ int events_reported;
+
+ struct ib_ucm_file *file;
+ struct ib_cm_id *cm_id;
+ __u64 uid;
+
+ struct list_head events; /* list of pending events. */
+ struct list_head file_list; /* member in file ctx list */
+};
+
+struct ib_ucm_event {
+ struct ib_ucm_context *ctx;
+ struct list_head file_list; /* member in file event list */
+ struct list_head ctx_list; /* member in ctx event list */
-module_param_named(debug_level, ucm_debug_level, int, 0644);
-MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0");
+ struct ib_cm_id *cm_id;
+ struct ib_ucm_event_resp resp;
+ void *data;
+ void *info;
+ int data_len;
+ int info_len;
+};
enum {
IB_UCM_MAJOR = 231,
- IB_UCM_MINOR = 255
+ IB_UCM_BASE_MINOR = 224,
+ IB_UCM_MAX_DEVICES = 32
};
-#define IB_UCM_DEV MKDEV(IB_UCM_MAJOR, IB_UCM_MINOR)
+#define IB_UCM_BASE_DEV MKDEV(IB_UCM_MAJOR, IB_UCM_BASE_MINOR)
-#define PFX "UCM: "
+static void ib_ucm_add_one(struct ib_device *device);
+static void ib_ucm_remove_one(struct ib_device *device);
-#define ucm_dbg(format, arg...) \
- do { \
- if (ucm_debug_level > 0) \
- printk(KERN_DEBUG PFX format, ## arg); \
- } while (0)
+static struct ib_client ucm_client = {
+ .name = "ucm",
+ .add = ib_ucm_add_one,
+ .remove = ib_ucm_remove_one
+};
-static struct semaphore ctx_id_mutex;
-static struct idr ctx_id_table;
+static DECLARE_MUTEX(ctx_id_mutex);
+static DEFINE_IDR(ctx_id_table);
+static DECLARE_BITMAP(dev_map, IB_UCM_MAX_DEVICES);
static struct ib_ucm_context *ib_ucm_ctx_get(struct ib_ucm_file *file, int id)
{
goto error;
list_add_tail(&ctx->file_list, &file->ctxs);
- ucm_dbg("Allocated CM ID <%d>\n", ctx->id);
return ctx;
error:
kfree(ctx);
return NULL;
}
-/*
- * Event portion of the API, handle CM events
- * and allow event polling.
- */
+
static void ib_ucm_event_path_get(struct ib_ucm_path_rec *upath,
struct ib_sa_path_rec *kpath)
{
ureq->retry_count = kreq->retry_count;
ureq->rnr_retry_count = kreq->rnr_retry_count;
ureq->srq = kreq->srq;
+ ureq->port = kreq->port;
ib_ucm_event_path_get(&ureq->primary_path, kreq->primary_path);
ib_ucm_event_path_get(&ureq->alternate_path, kreq->alternate_path);
case IB_CM_SIDR_REQ_RECEIVED:
uvt->resp.u.sidr_req_resp.pkey =
evt->param.sidr_req_rcvd.pkey;
+ uvt->resp.u.sidr_req_resp.port =
+ evt->param.sidr_req_rcvd.port;
uvt->data_len = IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE;
break;
case IB_CM_SIDR_REP_RECEIVED:
if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
return -EFAULT;
- /*
- * wait
- */
+
down(&file->mutex);
while (list_empty(&file->events)) {
return result;
}
-
static ssize_t ib_ucm_create_id(struct ib_ucm_file *file,
const char __user *inbuf,
int in_len, int out_len)
return -ENOMEM;
ctx->uid = cmd.uid;
- ctx->cm_id = ib_create_cm_id(ib_ucm_event_handler, ctx);
+ ctx->cm_id = ib_create_cm_id(file->device->ib_dev,
+ ib_ucm_event_handler, ctx);
if (IS_ERR(ctx->cm_id)) {
result = PTR_ERR(ctx->cm_id);
- goto err;
+ goto err1;
}
resp.id = ctx->id;
if (copy_to_user((void __user *)(unsigned long)cmd.response,
&resp, sizeof(resp))) {
result = -EFAULT;
- goto err;
+ goto err2;
}
-
return 0;
-err:
+err2:
+ ib_destroy_cm_id(ctx->cm_id);
+err1:
down(&ctx_id_mutex);
idr_remove(&ctx_id_table, ctx->id);
up(&ctx_id_mutex);
-
- if (!IS_ERR(ctx->cm_id))
- ib_destroy_cm_id(ctx->cm_id);
-
kfree(ctx);
return result;
}
if (copy_from_user(&hdr, buf, sizeof(hdr)))
return -EFAULT;
- ucm_dbg("Write. cmd <%d> in <%d> out <%d> len <%Zu>\n",
- hdr.cmd, hdr.in, hdr.out, len);
-
if (hdr.cmd < 0 || hdr.cmd >= ARRAY_SIZE(ucm_cmd_table))
return -EINVAL;
filp->private_data = file;
file->filp = filp;
-
- ucm_dbg("Created struct\n");
+ file->device = container_of(inode->i_cdev, struct ib_ucm_device, dev);
return 0;
}
return 0;
}
-static struct file_operations ib_ucm_fops = {
+static void ib_ucm_release_class_dev(struct class_device *class_dev)
+{
+ struct ib_ucm_device *dev;
+
+ dev = container_of(class_dev, struct ib_ucm_device, class_dev);
+ cdev_del(&dev->dev);
+ clear_bit(dev->devnum, dev_map);
+ kfree(dev);
+}
+
+static struct file_operations ucm_fops = {
.owner = THIS_MODULE,
.open = ib_ucm_open,
.release = ib_ucm_close,
.poll = ib_ucm_poll,
};
+static struct class ucm_class = {
+ .name = "infiniband_cm",
+ .release = ib_ucm_release_class_dev
+};
-static struct class *ib_ucm_class;
-static struct cdev ib_ucm_cdev;
+static ssize_t show_dev(struct class_device *class_dev, char *buf)
+{
+ struct ib_ucm_device *dev;
+
+ dev = container_of(class_dev, struct ib_ucm_device, class_dev);
+ return print_dev_t(buf, dev->dev.dev);
+}
+static CLASS_DEVICE_ATTR(dev, S_IRUGO, show_dev, NULL);
-static int __init ib_ucm_init(void)
+static ssize_t show_ibdev(struct class_device *class_dev, char *buf)
{
- int result;
+ struct ib_ucm_device *dev;
+
+ dev = container_of(class_dev, struct ib_ucm_device, class_dev);
+ return sprintf(buf, "%s\n", dev->ib_dev->name);
+}
+static CLASS_DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL);
- result = register_chrdev_region(IB_UCM_DEV, 1, "infiniband_cm");
- if (result) {
- ucm_dbg("Error <%d> registering dev\n", result);
- goto err_chr;
- }
+static void ib_ucm_add_one(struct ib_device *device)
+{
+ struct ib_ucm_device *ucm_dev;
+
+ if (!device->alloc_ucontext)
+ return;
+
+ ucm_dev = kmalloc(sizeof *ucm_dev, GFP_KERNEL);
+ if (!ucm_dev)
+ return;
- cdev_init(&ib_ucm_cdev, &ib_ucm_fops);
+ memset(ucm_dev, 0, sizeof *ucm_dev);
+ ucm_dev->ib_dev = device;
+
+ ucm_dev->devnum = find_first_zero_bit(dev_map, IB_UCM_MAX_DEVICES);
+ if (ucm_dev->devnum >= IB_UCM_MAX_DEVICES)
+ goto err;
+
+ set_bit(ucm_dev->devnum, dev_map);
+
+ cdev_init(&ucm_dev->dev, &ucm_fops);
+ ucm_dev->dev.owner = THIS_MODULE;
+ kobject_set_name(&ucm_dev->dev.kobj, "ucm%d", ucm_dev->devnum);
+ if (cdev_add(&ucm_dev->dev, IB_UCM_BASE_DEV + ucm_dev->devnum, 1))
+ goto err;
- result = cdev_add(&ib_ucm_cdev, IB_UCM_DEV, 1);
- if (result) {
- ucm_dbg("Error <%d> adding cdev\n", result);
+ ucm_dev->class_dev.class = &ucm_class;
+ ucm_dev->class_dev.dev = device->dma_device;
+ snprintf(ucm_dev->class_dev.class_id, BUS_ID_SIZE, "ucm%d",
+ ucm_dev->devnum);
+ if (class_device_register(&ucm_dev->class_dev))
goto err_cdev;
- }
- ib_ucm_class = class_create(THIS_MODULE, "infiniband_cm");
- if (IS_ERR(ib_ucm_class)) {
- result = PTR_ERR(ib_ucm_class);
- ucm_dbg("Error <%d> creating class\n", result);
+ if (class_device_create_file(&ucm_dev->class_dev,
+ &class_device_attr_dev))
+ goto err_class;
+ if (class_device_create_file(&ucm_dev->class_dev,
+ &class_device_attr_ibdev))
goto err_class;
+
+ ib_set_client_data(device, &ucm_client, ucm_dev);
+ return;
+
+err_class:
+ class_device_unregister(&ucm_dev->class_dev);
+err_cdev:
+ cdev_del(&ucm_dev->dev);
+ clear_bit(ucm_dev->devnum, dev_map);
+err:
+ kfree(ucm_dev);
+ return;
+}
+
+static void ib_ucm_remove_one(struct ib_device *device)
+{
+ struct ib_ucm_device *ucm_dev = ib_get_client_data(device, &ucm_client);
+
+ if (!ucm_dev)
+ return;
+
+ class_device_unregister(&ucm_dev->class_dev);
+}
+
+static ssize_t show_abi_version(struct class *class, char *buf)
+{
+ return sprintf(buf, "%d\n", IB_USER_CM_ABI_VERSION);
+}
+static CLASS_ATTR(abi_version, S_IRUGO, show_abi_version, NULL);
+
+static int __init ib_ucm_init(void)
+{
+ int ret;
+
+ ret = register_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_MAX_DEVICES,
+ "infiniband_cm");
+ if (ret) {
+ printk(KERN_ERR "ucm: couldn't register device number\n");
+ goto err;
}
- class_device_create(ib_ucm_class, IB_UCM_DEV, NULL, "ucm");
+ ret = class_register(&ucm_class);
+ if (ret) {
+ printk(KERN_ERR "ucm: couldn't create class infiniband_cm\n");
+ goto err_chrdev;
+ }
- idr_init(&ctx_id_table);
- init_MUTEX(&ctx_id_mutex);
+ ret = class_create_file(&ucm_class, &class_attr_abi_version);
+ if (ret) {
+ printk(KERN_ERR "ucm: couldn't create abi_version attribute\n");
+ goto err_class;
+ }
+ ret = ib_register_client(&ucm_client);
+ if (ret) {
+ printk(KERN_ERR "ucm: couldn't register client\n");
+ goto err_class;
+ }
return 0;
+
err_class:
- cdev_del(&ib_ucm_cdev);
-err_cdev:
- unregister_chrdev_region(IB_UCM_DEV, 1);
-err_chr:
- return result;
+ class_unregister(&ucm_class);
+err_chrdev:
+ unregister_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_MAX_DEVICES);
+err:
+ return ret;
}
static void __exit ib_ucm_cleanup(void)
{
- class_device_destroy(ib_ucm_class, IB_UCM_DEV);
- class_destroy(ib_ucm_class);
- cdev_del(&ib_ucm_cdev);
- unregister_chrdev_region(IB_UCM_DEV, 1);
+ ib_unregister_client(&ucm_client);
+ class_unregister(&ucm_class);
+ unregister_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_MAX_DEVICES);
idr_destroy(&ctx_id_table);
}
projects / linux-2.6-omap-h63xx.git / blobdiff