/* * 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 __FBSDID("$FreeBSD$"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include 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);