| Current Path : /sys/contrib/rdma/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //sys/contrib/rdma/rdma_device.c |
/*
* Copyright (c) 2004 Topspin Communications. All rights reserved.
* Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* $Id: device.c 1349 2004-12-16 21:09:43Z roland $
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/contrib/rdma/rdma_device.c 178784 2008-05-05 18:35:55Z kmacy $");
#include <sys/types.h>
#include <sys/param.h>
#include <sys/condvar.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/libkern.h>
#include <sys/socket.h>
#include <sys/module.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/rwlock.h>
#include <sys/queue.h>
#include <sys/taskqueue.h>
#include <sys/priv.h>
#include <sys/syslog.h>
#include <contrib/rdma/core_priv.h>
struct ib_client_data {
TAILQ_ENTRY(ib_client_data) list;
struct ib_client *client;
void * data;
};
static TAILQ_HEAD(, ib_device) device_list;
static TAILQ_HEAD(client_list_s, ib_client) client_list;
/*
* device_mutex protects access to both device_list and client_list.
* There's no real point to using multiple locks or something fancier
* like an rwsem: we always access both lists, and we're always
* modifying one list or the other list. In any case this is not a
* hot path so there's no point in trying to optimize.
*/
static struct mtx device_mutex;
static int ib_device_check_mandatory(struct ib_device *device)
{
#define IB_MANDATORY_FUNC(x) { offsetof(struct ib_device, x), #x }
#define MANDATORY_TABLE_DEPTH 19
static const struct {
size_t offset;
char *name;
} mandatory_table[] = {
IB_MANDATORY_FUNC(query_device),
IB_MANDATORY_FUNC(query_port),
IB_MANDATORY_FUNC(query_pkey),
IB_MANDATORY_FUNC(query_gid),
IB_MANDATORY_FUNC(alloc_pd),
IB_MANDATORY_FUNC(dealloc_pd),
IB_MANDATORY_FUNC(create_ah),
IB_MANDATORY_FUNC(destroy_ah),
IB_MANDATORY_FUNC(create_qp),
IB_MANDATORY_FUNC(modify_qp),
IB_MANDATORY_FUNC(destroy_qp),
IB_MANDATORY_FUNC(post_send),
IB_MANDATORY_FUNC(post_recv),
IB_MANDATORY_FUNC(create_cq),
IB_MANDATORY_FUNC(destroy_cq),
IB_MANDATORY_FUNC(poll_cq),
IB_MANDATORY_FUNC(req_notify_cq),
IB_MANDATORY_FUNC(get_dma_mr),
IB_MANDATORY_FUNC(dereg_mr)
};
int i;
for (i = 0; i < MANDATORY_TABLE_DEPTH; ++i) {
if (!*(void **) ((void *) ((unsigned long)device + mandatory_table[i].offset))) {
log(LOG_WARNING, "Device %s is missing mandatory function %s\n",
device->name, mandatory_table[i].name);
return (EINVAL);
}
}
return 0;
}
static struct ib_device *__ib_device_get_by_name(const char *name)
{
struct ib_device *device;
TAILQ_FOREACH(device, &device_list, core_list)
if (!strncmp(name, device->name, IB_DEVICE_NAME_MAX))
return device;
return NULL;
}
static int alloc_name(char *name)
{
long *inuse;
char buf[IB_DEVICE_NAME_MAX];
struct ib_device *device;
int i;
inuse = malloc(PAGE_SIZE, M_DEVBUF, M_NOWAIT);
if (!inuse)
return (ENOMEM);
TAILQ_FOREACH(device, &device_list, core_list) {
if (!sscanf(device->name, name, &i))
continue;
if (i < 0 || i >= PAGE_SIZE * 8)
continue;
snprintf(buf, sizeof buf, name, i);
if (!strncmp(buf, device->name, IB_DEVICE_NAME_MAX))
setbit(inuse, i);
}
i = find_first_zero_bit(inuse, PAGE_SIZE * 8);
free(inuse, M_DEVBUF);
snprintf(buf, sizeof buf, name, i);
if (__ib_device_get_by_name(buf))
return (ENFILE);
strlcpy(name, buf, IB_DEVICE_NAME_MAX);
return 0;
}
static int start_port(struct ib_device *device)
{
return (device->node_type == RDMA_NODE_IB_SWITCH) ? 0 : 1;
}
static int end_port(struct ib_device *device)
{
return (device->node_type == RDMA_NODE_IB_SWITCH) ?
0 : device->phys_port_cnt;
}
/**
* ib_alloc_device - allocate an IB device struct
* @size:size of structure to allocate
*
* Low-level drivers should use ib_alloc_device() to allocate &struct
* ib_device. @size is the size of the structure to be allocated,
* including any private data used by the low-level driver.
* ib_dealloc_device() must be used to free structures allocated with
* ib_alloc_device().
*/
struct ib_device *ib_alloc_device(size_t size)
{
void *dev;
if (size < sizeof (struct ib_device))
panic("size=%zd < sizeof (struct ib_device)=%zd)",
size, sizeof (struct ib_device));
dev = malloc(size, M_DEVBUF, M_NOWAIT);
if (dev)
bzero(dev, size);
return dev;
}
/**
* ib_dealloc_device - free an IB device struct
* @device:structure to free
*
* Free a structure allocated with ib_alloc_device().
*/
void ib_dealloc_device(struct ib_device *device)
{
if (device->reg_state == IB_DEV_UNINITIALIZED) {
free(device, M_DEVBUF);
return;
}
if (device->reg_state != IB_DEV_UNREGISTERED)
panic("device->reg_state=%d != IB_DEV_UNREGISTERED)",
device->reg_state);
#ifdef notyet
ib_device_unregister_sysfs(device);
#endif
}
static int add_client_context(struct ib_device *device, struct ib_client *client)
{
struct ib_client_data *context;
context = malloc(sizeof *context, M_DEVBUF, M_NOWAIT);
if (!context) {
log(LOG_WARNING, "Couldn't allocate client context for %s/%s\n",
device->name, client->name);
return (ENOMEM);
}
context->client = client;
context->data = NULL;
mtx_lock(&device->client_data_lock);
TAILQ_INSERT_TAIL(&device->client_data_list, context, list);
mtx_unlock(&device->client_data_lock);
return 0;
}
static int read_port_table_lengths(struct ib_device *device)
{
struct ib_port_attr *tprops = NULL;
int num_ports, ret = ENOMEM;
u8 port_index;
tprops = malloc(sizeof *tprops, M_DEVBUF, M_NOWAIT);
if (!tprops)
goto out;
num_ports = end_port(device) - start_port(device) + 1;
device->pkey_tbl_len = malloc(sizeof *device->pkey_tbl_len * num_ports,
M_DEVBUF, M_NOWAIT);
device->gid_tbl_len = malloc(sizeof *device->gid_tbl_len * num_ports,
M_DEVBUF, M_NOWAIT);
if (!device->pkey_tbl_len || !device->gid_tbl_len)
goto err;
for (port_index = 0; port_index < num_ports; ++port_index) {
ret = ib_query_port(device, port_index + start_port(device),
tprops);
if (ret)
goto err;
device->pkey_tbl_len[port_index] = tprops->pkey_tbl_len;
device->gid_tbl_len[port_index] = tprops->gid_tbl_len;
}
ret = 0;
goto out;
err:
free(device->gid_tbl_len, M_DEVBUF);
free(device->pkey_tbl_len, M_DEVBUF);
out:
free(tprops, M_DEVBUF);
return ret;
}
/**
* ib_register_device - Register an IB device with IB core
* @device:Device to register
*
* Low-level drivers use ib_register_device() to register their
* devices with the IB core. All registered clients will receive a
* callback for each device that is added. @device must be allocated
* with ib_alloc_device().
*/
int ib_register_device(struct ib_device *device)
{
int ret;
mtx_lock(&device_mutex);
if (strchr(device->name, '%')) {
ret = alloc_name(device->name);
if (ret)
goto out;
}
if (ib_device_check_mandatory(device)) {
ret = EINVAL;
goto out;
}
TAILQ_INIT(&device->event_handler_list);
TAILQ_INIT(&device->client_data_list);
mtx_init(&device->event_handler_lock, "ib event handler", NULL,
MTX_DUPOK|MTX_DEF);
mtx_init(&device->client_data_lock, "ib client data", NULL,
MTX_DUPOK|MTX_DEF);
ret = read_port_table_lengths(device);
if (ret) {
log(LOG_WARNING, "Couldn't create table lengths cache for device %s\n",
device->name);
goto out;
}
#ifdef notyet
ret = ib_device_register_sysfs(device);
if (ret) {
log(LOG_WARNING, "Couldn't register device %s with driver model\n",
device->name);
free(device->gid_tbl_len, M_DEVBUF);
free(device->pkey_tbl_len, M_DEVBUF);
goto out;
}
#endif
TAILQ_INSERT_TAIL(&device_list, device, core_list);
device->reg_state = IB_DEV_REGISTERED;
{
struct ib_client *client;
TAILQ_FOREACH(client, &client_list, list)
if (client->add && !add_client_context(device, client))
client->add(device);
}
out:
mtx_unlock(&device_mutex);
return ret;
}
/**
* ib_unregister_device - Unregister an IB device
* @device:Device to unregister
*
* Unregister an IB device. All clients will receive a remove callback.
*/
void ib_unregister_device(struct ib_device *device)
{
struct ib_client *client;
struct ib_client_data *context, *tmp;
mtx_lock(&device_mutex);
TAILQ_FOREACH_REVERSE(client, &client_list, client_list_s, list)
if (client->remove)
client->remove(device);
TAILQ_REMOVE(&device_list, device, core_list);
free(device->gid_tbl_len, M_DEVBUF);
free(device->pkey_tbl_len, M_DEVBUF);
mtx_unlock(&device_mutex);
mtx_lock(&device->client_data_lock);
TAILQ_FOREACH_SAFE(context, &device->client_data_list, list, tmp)
free(context, M_DEVBUF);
mtx_unlock(&device->client_data_lock);
device->reg_state = IB_DEV_UNREGISTERED;
}
/**
* ib_register_client - Register an IB client
* @client:Client to register
*
* Upper level users of the IB drivers can use ib_register_client() to
* register callbacks for IB device addition and removal. When an IB
* device is added, each registered client's add method will be called
* (in the order the clients were registered), and when a device is
* removed, each client's remove method will be called (in the reverse
* order that clients were registered). In addition, when
* ib_register_client() is called, the client will receive an add
* callback for all devices already registered.
*/
int ib_register_client(struct ib_client *client)
{
struct ib_device *device;
mtx_lock(&device_mutex);
TAILQ_INSERT_TAIL(&client_list, client, list);
TAILQ_FOREACH(device, &device_list, core_list)
if (client->add && !add_client_context(device, client))
client->add(device);
mtx_unlock(&device_mutex);
return 0;
}
/**
* ib_unregister_client - Unregister an IB client
* @client:Client to unregister
*
* Upper level users use ib_unregister_client() to remove their client
* registration. When ib_unregister_client() is called, the client
* will receive a remove callback for each IB device still registered.
*/
void ib_unregister_client(struct ib_client *client)
{
struct ib_client_data *context, *tmp;
struct ib_device *device;
mtx_lock(&device_mutex);
TAILQ_FOREACH(device, &device_list, core_list) {
if (client->remove)
client->remove(device);
mtx_lock(&device->client_data_lock);
TAILQ_FOREACH_SAFE(context, &device->client_data_list, list,tmp)
if (context->client == client) {
TAILQ_REMOVE(&device->client_data_list, context,
list);
free(context, M_DEVBUF);
}
mtx_unlock(&device->client_data_lock);
}
TAILQ_REMOVE(&client_list, client, list);
mtx_unlock(&device_mutex);
}
/**
* ib_get_client_data - Get IB client context
* @device:Device to get context for
* @client:Client to get context for
*
* ib_get_client_data() returns client context set with
* ib_set_client_data().
*/
void *ib_get_client_data(struct ib_device *device, struct ib_client *client)
{
struct ib_client_data *context;
void *ret = NULL;
mtx_lock(&device->client_data_lock);
TAILQ_FOREACH(context, &device->client_data_list, list)
if (context->client == client) {
ret = context->data;
break;
}
mtx_unlock(&device->client_data_lock);
return ret;
}
/**
* ib_set_client_data - Set IB client context
* @device:Device to set context for
* @client:Client to set context for
* @data:Context to set
*
* ib_set_client_data() sets client context that can be retrieved with
* ib_get_client_data().
*/
void ib_set_client_data(struct ib_device *device, struct ib_client *client,
void *data)
{
struct ib_client_data *context;
mtx_lock(&device->client_data_lock);
TAILQ_FOREACH(context, &device->client_data_list, list)
if (context->client == client) {
context->data = data;
goto out;
}
log(LOG_WARNING, "No client context found for %s/%s\n",
device->name, client->name);
out:
mtx_unlock(&device->client_data_lock);
}
/**
* ib_register_event_handler - Register an IB event handler
* @event_handler:Handler to register
*
* ib_register_event_handler() registers an event handler that will be
* called back when asynchronous IB events occur (as defined in
* chapter 11 of the InfiniBand Architecture Specification). This
* callback may occur in interrupt context.
*/
int ib_register_event_handler (struct ib_event_handler *event_handler)
{
mtx_lock(&event_handler->device->event_handler_lock);
TAILQ_INSERT_TAIL(&event_handler->device->event_handler_list,
event_handler, list);
mtx_unlock(&event_handler->device->event_handler_lock);
return 0;
}
/**
* ib_unregister_event_handler - Unregister an event handler
* @event_handler:Handler to unregister
*
* Unregister an event handler registered with
* ib_register_event_handler().
*/
int ib_unregister_event_handler(struct ib_event_handler *event_handler)
{
mtx_lock(&event_handler->device->event_handler_lock);
TAILQ_REMOVE(&event_handler->device->event_handler_list, event_handler,
list);
mtx_unlock(&event_handler->device->event_handler_lock);
return 0;
}
/**
* ib_dispatch_event - Dispatch an asynchronous event
* @event:Event to dispatch
*
* Low-level drivers must call ib_dispatch_event() to dispatch the
* event to all registered event handlers when an asynchronous event
* occurs.
*/
void ib_dispatch_event(struct ib_event *event)
{
struct ib_event_handler *handler;
mtx_lock(&event->device->event_handler_lock);
TAILQ_FOREACH(handler, &event->device->event_handler_list, list)
handler->handler(handler, event);
mtx_unlock(&event->device->event_handler_lock);
}
/**
* ib_query_device - Query IB device attributes
* @device:Device to query
* @device_attr:Device attributes
*
* ib_query_device() returns the attributes of a device through the
* @device_attr pointer.
*/
int ib_query_device(struct ib_device *device,
struct ib_device_attr *device_attr)
{
return device->query_device(device, device_attr);
}
/**
* ib_query_port - Query IB port attributes
* @device:Device to query
* @port_num:Port number to query
* @port_attr:Port attributes
*
* ib_query_port() returns the attributes of a port through the
* @port_attr pointer.
*/
int ib_query_port(struct ib_device *device,
u8 port_num,
struct ib_port_attr *port_attr)
{
if (port_num < start_port(device) || port_num > end_port(device))
return (EINVAL);
return device->query_port(device, port_num, port_attr);
}
/**
* ib_query_gid - Get GID table entry
* @device:Device to query
* @port_num:Port number to query
* @index:GID table index to query
* @gid:Returned GID
*
* ib_query_gid() fetches the specified GID table entry.
*/
int ib_query_gid(struct ib_device *device,
u8 port_num, int index, union ib_gid *gid)
{
return device->query_gid(device, port_num, index, gid);
}
/**
* ib_query_pkey - Get P_Key table entry
* @device:Device to query
* @port_num:Port number to query
* @index:P_Key table index to query
* @pkey:Returned P_Key
*
* ib_query_pkey() fetches the specified P_Key table entry.
*/
int ib_query_pkey(struct ib_device *device,
u8 port_num, u16 index, u16 *pkey)
{
return device->query_pkey(device, port_num, index, pkey);
}
/**
* ib_modify_device - Change IB device attributes
* @device:Device to modify
* @device_modify_mask:Mask of attributes to change
* @device_modify:New attribute values
*
* ib_modify_device() changes a device's attributes as specified by
* the @device_modify_mask and @device_modify structure.
*/
int ib_modify_device(struct ib_device *device,
int device_modify_mask,
struct ib_device_modify *device_modify)
{
return device->modify_device(device, device_modify_mask,
device_modify);
}
/**
* ib_modify_port - Modifies the attributes for the specified port.
* @device: The device to modify.
* @port_num: The number of the port to modify.
* @port_modify_mask: Mask used to specify which attributes of the port
* to change.
* @port_modify: New attribute values for the port.
*
* ib_modify_port() changes a port's attributes as specified by the
* @port_modify_mask and @port_modify structure.
*/
int ib_modify_port(struct ib_device *device,
u8 port_num, int port_modify_mask,
struct ib_port_modify *port_modify)
{
if (port_num < start_port(device) || port_num > end_port(device))
return (EINVAL);
return device->modify_port(device, port_num, port_modify_mask,
port_modify);
}
/**
* ib_find_gid - Returns the port number and GID table index where
* a specified GID value occurs.
* @device: The device to query.
* @gid: The GID value to search for.
* @port_num: The port number of the device where the GID value was found.
* @index: The index into the GID table where the GID was found. This
* parameter may be NULL.
*/
int ib_find_gid(struct ib_device *device, union ib_gid *gid,
u8 *port_num, u16 *index)
{
union ib_gid tmp_gid;
int ret, port, i;
for (port = start_port(device); port <= end_port(device); ++port) {
for (i = 0; i < device->gid_tbl_len[port - start_port(device)]; ++i) {
ret = ib_query_gid(device, port, i, &tmp_gid);
if (ret)
return ret;
if (!memcmp(&tmp_gid, gid, sizeof *gid)) {
*port_num = port;
if (index)
*index = i;
return 0;
}
}
}
return (ENOENT);
}
/**
* ib_find_pkey - Returns the PKey table index where a specified
* PKey value occurs.
* @device: The device to query.
* @port_num: The port number of the device to search for the PKey.
* @pkey: The PKey value to search for.
* @index: The index into the PKey table where the PKey was found.
*/
int ib_find_pkey(struct ib_device *device,
u8 port_num, u16 pkey, u16 *index)
{
int ret, i;
u16 tmp_pkey;
for (i = 0; i < device->pkey_tbl_len[port_num - start_port(device)]; ++i) {
ret = ib_query_pkey(device, port_num, i, &tmp_pkey);
if (ret)
return ret;
if (pkey == tmp_pkey) {
*index = i;
return 0;
}
}
return (ENOENT);
}
static int rdma_core_init(void)
{
int ret;
#ifdef notyet
ret = ib_sysfs_setup();
if (ret)
log(LOG_WARNING, "Couldn't create InfiniBand device class\n");
#endif
mtx_init(&device_mutex, "rdma_device mutex", NULL, MTX_DEF);
TAILQ_INIT(&client_list);
TAILQ_INIT(&device_list);
ret = ib_cache_setup();
if (ret) {
log(LOG_WARNING, "Couldn't set up InfiniBand P_Key/GID cache\n");
#ifdef notyet
ib_sysfs_cleanup();
#endif
}
return ret;
}
static void rdma_core_cleanup(void)
{
ib_cache_cleanup();
#ifdef notyet
ib_sysfs_cleanup();
/* Make sure that any pending umem accounting work is done. */
flush_scheduled_work();
#endif
}
static int
rdma_core_load(module_t mod, int cmd, void *arg)
{
int err = 0;
switch (cmd) {
case MOD_LOAD:
printf("Loading rdma_core.\n");
rdma_core_init();
break;
case MOD_QUIESCE:
break;
case MOD_UNLOAD:
printf("Unloading rdma_core.\n");
rdma_core_cleanup();
break;
case MOD_SHUTDOWN:
break;
default:
err = EOPNOTSUPP;
break;
}
return (err);
}
static moduledata_t mod_data = {
"rdma_core",
rdma_core_load,
0
};
MODULE_VERSION(rdma_core, 1);
DECLARE_MODULE(rdma_core, mod_data, SI_SUB_EXEC, SI_ORDER_ANY);