#include <linux/dma-mapping.h>
#include <linux/kref.h>
#include <linux/idr.h>
+#include <linux/workqueue.h>
#include <rdma/ib_pack.h>
#include <rdma/ib_sa.h>
struct ib_sa_query {
void (*callback)(struct ib_sa_query *, int, struct ib_sa_mad *);
void (*release)(struct ib_sa_query *);
- struct ib_sa_port *port;
- struct ib_sa_mad *mad;
- struct ib_sa_sm_ah *sm_ah;
- DECLARE_PCI_UNMAP_ADDR(mapping)
- int id;
+ struct ib_sa_port *port;
+ struct ib_mad_send_buf *mad_buf;
+ struct ib_sa_sm_ah *sm_ah;
+ int id;
};
struct ib_sa_service_query {
{
unsigned long flags;
struct ib_mad_agent *agent;
+ struct ib_mad_send_buf *mad_buf;
spin_lock_irqsave(&idr_lock, flags);
if (idr_find(&query_idr, id) != query) {
return;
}
agent = query->port->agent;
+ mad_buf = query->mad_buf;
spin_unlock_irqrestore(&idr_lock, flags);
- ib_cancel_mad(agent, id);
+ ib_cancel_mad(agent, mad_buf);
}
EXPORT_SYMBOL(ib_sa_cancel_query);
static int send_mad(struct ib_sa_query *query, int timeout_ms)
{
- struct ib_sa_port *port = query->port;
unsigned long flags;
- int ret;
- struct ib_sge gather_list;
- struct ib_send_wr *bad_wr, wr = {
- .opcode = IB_WR_SEND,
- .sg_list = &gather_list,
- .num_sge = 1,
- .send_flags = IB_SEND_SIGNALED,
- .wr = {
- .ud = {
- .mad_hdr = &query->mad->mad_hdr,
- .remote_qpn = 1,
- .remote_qkey = IB_QP1_QKEY,
- .timeout_ms = timeout_ms,
- }
- }
- };
+ int ret, id;
retry:
if (!idr_pre_get(&query_idr, GFP_ATOMIC))
return -ENOMEM;
spin_lock_irqsave(&idr_lock, flags);
- ret = idr_get_new(&query_idr, query, &query->id);
+ ret = idr_get_new(&query_idr, query, &id);
spin_unlock_irqrestore(&idr_lock, flags);
if (ret == -EAGAIN)
goto retry;
if (ret)
return ret;
- wr.wr_id = query->id;
+ query->mad_buf->timeout_ms = timeout_ms;
+ query->mad_buf->context[0] = query;
+ query->id = id;
- spin_lock_irqsave(&port->ah_lock, flags);
- kref_get(&port->sm_ah->ref);
- query->sm_ah = port->sm_ah;
- wr.wr.ud.ah = port->sm_ah->ah;
- spin_unlock_irqrestore(&port->ah_lock, flags);
+ spin_lock_irqsave(&query->port->ah_lock, flags);
+ kref_get(&query->port->sm_ah->ref);
+ query->sm_ah = query->port->sm_ah;
+ spin_unlock_irqrestore(&query->port->ah_lock, flags);
- gather_list.addr = dma_map_single(port->agent->device->dma_device,
- query->mad,
- sizeof (struct ib_sa_mad),
- DMA_TO_DEVICE);
- gather_list.length = sizeof (struct ib_sa_mad);
- gather_list.lkey = port->agent->mr->lkey;
- pci_unmap_addr_set(query, mapping, gather_list.addr);
+ query->mad_buf->ah = query->sm_ah->ah;
- ret = ib_post_send_mad(port->agent, &wr, &bad_wr);
+ ret = ib_post_send_mad(query->mad_buf, NULL);
if (ret) {
- dma_unmap_single(port->agent->device->dma_device,
- pci_unmap_addr(query, mapping),
- sizeof (struct ib_sa_mad),
- DMA_TO_DEVICE);
- kref_put(&query->sm_ah->ref, free_sm_ah);
spin_lock_irqsave(&idr_lock, flags);
- idr_remove(&query_idr, query->id);
+ idr_remove(&query_idr, id);
spin_unlock_irqrestore(&idr_lock, flags);
+
+ kref_put(&query->sm_ah->ref, free_sm_ah);
}
/*
* It's not safe to dereference query any more, because the
* send may already have completed and freed the query in
- * another context. So use wr.wr_id, which has a copy of the
- * query's id.
+ * another context.
*/
- return ret ? ret : wr.wr_id;
+ return ret ? ret : id;
}
static void ib_sa_path_rec_callback(struct ib_sa_query *sa_query,
static void ib_sa_path_rec_release(struct ib_sa_query *sa_query)
{
- kfree(sa_query->mad);
kfree(container_of(sa_query, struct ib_sa_path_query, sa_query));
}
{
struct ib_sa_path_query *query;
struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
- struct ib_sa_port *port = &sa_dev->port[port_num - sa_dev->start_port];
- struct ib_mad_agent *agent = port->agent;
+ struct ib_sa_port *port;
+ struct ib_mad_agent *agent;
+ struct ib_sa_mad *mad;
int ret;
+ if (!sa_dev)
+ return -ENODEV;
+
+ port = &sa_dev->port[port_num - sa_dev->start_port];
+ agent = port->agent;
+
query = kmalloc(sizeof *query, gfp_mask);
if (!query)
return -ENOMEM;
- query->sa_query.mad = kmalloc(sizeof *query->sa_query.mad, gfp_mask);
- if (!query->sa_query.mad) {
- kfree(query);
- return -ENOMEM;
+
+ query->sa_query.mad_buf = ib_create_send_mad(agent, 1, 0,
+ 0, IB_MGMT_SA_HDR,
+ IB_MGMT_SA_DATA, gfp_mask);
+ if (!query->sa_query.mad_buf) {
+ ret = -ENOMEM;
+ goto err1;
}
query->callback = callback;
query->context = context;
- init_mad(query->sa_query.mad, agent);
+ mad = query->sa_query.mad_buf->mad;
+ init_mad(mad, agent);
- query->sa_query.callback = callback ? ib_sa_path_rec_callback : NULL;
- query->sa_query.release = ib_sa_path_rec_release;
- query->sa_query.port = port;
- query->sa_query.mad->mad_hdr.method = IB_MGMT_METHOD_GET;
- query->sa_query.mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_PATH_REC);
- query->sa_query.mad->sa_hdr.comp_mask = comp_mask;
+ query->sa_query.callback = callback ? ib_sa_path_rec_callback : NULL;
+ query->sa_query.release = ib_sa_path_rec_release;
+ query->sa_query.port = port;
+ mad->mad_hdr.method = IB_MGMT_METHOD_GET;
+ mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_PATH_REC);
+ mad->sa_hdr.comp_mask = comp_mask;
- ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table),
- rec, query->sa_query.mad->data);
+ ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, mad->data);
*sa_query = &query->sa_query;
ret = send_mad(&query->sa_query, timeout_ms);
- if (ret < 0) {
- *sa_query = NULL;
- kfree(query->sa_query.mad);
- kfree(query);
- }
+ if (ret < 0)
+ goto err2;
+
+ return ret;
+err2:
+ *sa_query = NULL;
+ ib_free_send_mad(query->sa_query.mad_buf);
+
+err1:
+ kfree(query);
return ret;
}
EXPORT_SYMBOL(ib_sa_path_rec_get);
static void ib_sa_service_rec_release(struct ib_sa_query *sa_query)
{
- kfree(sa_query->mad);
kfree(container_of(sa_query, struct ib_sa_service_query, sa_query));
}
{
struct ib_sa_service_query *query;
struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
- struct ib_sa_port *port = &sa_dev->port[port_num - sa_dev->start_port];
- struct ib_mad_agent *agent = port->agent;
+ struct ib_sa_port *port;
+ struct ib_mad_agent *agent;
+ struct ib_sa_mad *mad;
int ret;
+ if (!sa_dev)
+ return -ENODEV;
+
+ port = &sa_dev->port[port_num - sa_dev->start_port];
+ agent = port->agent;
+
if (method != IB_MGMT_METHOD_GET &&
method != IB_MGMT_METHOD_SET &&
method != IB_SA_METHOD_DELETE)
query = kmalloc(sizeof *query, gfp_mask);
if (!query)
return -ENOMEM;
- query->sa_query.mad = kmalloc(sizeof *query->sa_query.mad, gfp_mask);
- if (!query->sa_query.mad) {
- kfree(query);
- return -ENOMEM;
+
+ query->sa_query.mad_buf = ib_create_send_mad(agent, 1, 0,
+ 0, IB_MGMT_SA_HDR,
+ IB_MGMT_SA_DATA, gfp_mask);
+ if (!query->sa_query.mad_buf) {
+ ret = -ENOMEM;
+ goto err1;
}
query->callback = callback;
query->context = context;
- init_mad(query->sa_query.mad, agent);
+ mad = query->sa_query.mad_buf->mad;
+ init_mad(mad, agent);
- query->sa_query.callback = callback ? ib_sa_service_rec_callback : NULL;
- query->sa_query.release = ib_sa_service_rec_release;
- query->sa_query.port = port;
- query->sa_query.mad->mad_hdr.method = method;
- query->sa_query.mad->mad_hdr.attr_id =
- cpu_to_be16(IB_SA_ATTR_SERVICE_REC);
- query->sa_query.mad->sa_hdr.comp_mask = comp_mask;
+ query->sa_query.callback = callback ? ib_sa_service_rec_callback : NULL;
+ query->sa_query.release = ib_sa_service_rec_release;
+ query->sa_query.port = port;
+ mad->mad_hdr.method = method;
+ mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_SERVICE_REC);
+ mad->sa_hdr.comp_mask = comp_mask;
ib_pack(service_rec_table, ARRAY_SIZE(service_rec_table),
- rec, query->sa_query.mad->data);
+ rec, mad->data);
*sa_query = &query->sa_query;
ret = send_mad(&query->sa_query, timeout_ms);
- if (ret < 0) {
- *sa_query = NULL;
- kfree(query->sa_query.mad);
- kfree(query);
- }
+ if (ret < 0)
+ goto err2;
+
+ return ret;
+err2:
+ *sa_query = NULL;
+ ib_free_send_mad(query->sa_query.mad_buf);
+
+err1:
+ kfree(query);
return ret;
}
EXPORT_SYMBOL(ib_sa_service_rec_query);
static void ib_sa_mcmember_rec_release(struct ib_sa_query *sa_query)
{
- kfree(sa_query->mad);
kfree(container_of(sa_query, struct ib_sa_mcmember_query, sa_query));
}
{
struct ib_sa_mcmember_query *query;
struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
- struct ib_sa_port *port = &sa_dev->port[port_num - sa_dev->start_port];
- struct ib_mad_agent *agent = port->agent;
+ struct ib_sa_port *port;
+ struct ib_mad_agent *agent;
+ struct ib_sa_mad *mad;
int ret;
+ if (!sa_dev)
+ return -ENODEV;
+
+ port = &sa_dev->port[port_num - sa_dev->start_port];
+ agent = port->agent;
+
query = kmalloc(sizeof *query, gfp_mask);
if (!query)
return -ENOMEM;
- query->sa_query.mad = kmalloc(sizeof *query->sa_query.mad, gfp_mask);
- if (!query->sa_query.mad) {
- kfree(query);
- return -ENOMEM;
+
+ query->sa_query.mad_buf = ib_create_send_mad(agent, 1, 0,
+ 0, IB_MGMT_SA_HDR,
+ IB_MGMT_SA_DATA, gfp_mask);
+ if (!query->sa_query.mad_buf) {
+ ret = -ENOMEM;
+ goto err1;
}
query->callback = callback;
query->context = context;
- init_mad(query->sa_query.mad, agent);
+ mad = query->sa_query.mad_buf->mad;
+ init_mad(mad, agent);
- query->sa_query.callback = callback ? ib_sa_mcmember_rec_callback : NULL;
- query->sa_query.release = ib_sa_mcmember_rec_release;
- query->sa_query.port = port;
- query->sa_query.mad->mad_hdr.method = method;
- query->sa_query.mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_MC_MEMBER_REC);
- query->sa_query.mad->sa_hdr.comp_mask = comp_mask;
+ query->sa_query.callback = callback ? ib_sa_mcmember_rec_callback : NULL;
+ query->sa_query.release = ib_sa_mcmember_rec_release;
+ query->sa_query.port = port;
+ mad->mad_hdr.method = method;
+ mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_MC_MEMBER_REC);
+ mad->sa_hdr.comp_mask = comp_mask;
ib_pack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
- rec, query->sa_query.mad->data);
+ rec, mad->data);
*sa_query = &query->sa_query;
ret = send_mad(&query->sa_query, timeout_ms);
- if (ret < 0) {
- *sa_query = NULL;
- kfree(query->sa_query.mad);
- kfree(query);
- }
+ if (ret < 0)
+ goto err2;
return ret;
+
+err2:
+ *sa_query = NULL;
+ ib_free_send_mad(query->sa_query.mad_buf);
+
+err1:
+ kfree(query);
+ return ret;
}
EXPORT_SYMBOL(ib_sa_mcmember_rec_query);
static void send_handler(struct ib_mad_agent *agent,
struct ib_mad_send_wc *mad_send_wc)
{
- struct ib_sa_query *query;
+ struct ib_sa_query *query = mad_send_wc->send_buf->context[0];
unsigned long flags;
- spin_lock_irqsave(&idr_lock, flags);
- query = idr_find(&query_idr, mad_send_wc->wr_id);
- spin_unlock_irqrestore(&idr_lock, flags);
-
- if (!query)
- return;
-
if (query->callback)
switch (mad_send_wc->status) {
case IB_WC_SUCCESS:
break;
}
- dma_unmap_single(agent->device->dma_device,
- pci_unmap_addr(query, mapping),
- sizeof (struct ib_sa_mad),
- DMA_TO_DEVICE);
- kref_put(&query->sm_ah->ref, free_sm_ah);
-
- query->release(query);
-
spin_lock_irqsave(&idr_lock, flags);
- idr_remove(&query_idr, mad_send_wc->wr_id);
+ idr_remove(&query_idr, query->id);
spin_unlock_irqrestore(&idr_lock, flags);
+
+ ib_free_send_mad(mad_send_wc->send_buf);
+ kref_put(&query->sm_ah->ref, free_sm_ah);
+ query->release(query);
}
static void recv_handler(struct ib_mad_agent *mad_agent,
struct ib_mad_recv_wc *mad_recv_wc)
{
struct ib_sa_query *query;
- unsigned long flags;
+ struct ib_mad_send_buf *mad_buf;
- spin_lock_irqsave(&idr_lock, flags);
- query = idr_find(&query_idr, mad_recv_wc->wc->wr_id);
- spin_unlock_irqrestore(&idr_lock, flags);
+ mad_buf = (void *) (unsigned long) mad_recv_wc->wc->wr_id;
+ query = mad_buf->context[0];
- if (query && query->callback) {
+ if (query->callback) {
if (mad_recv_wc->wc->status == IB_WC_SUCCESS)
query->callback(query,
mad_recv_wc->recv_buf.mad->mad_hdr.status ?
ib_unregister_event_handler(&sa_dev->event_handler);
+ flush_scheduled_work();
+
for (i = 0; i <= sa_dev->end_port - sa_dev->start_port; ++i) {
ib_unregister_mad_agent(sa_dev->port[i].agent);
kref_put(&sa_dev->port[i].sm_ah->ref, free_sm_ah);
static void __exit ib_sa_cleanup(void)
{
ib_unregister_client(&sa_client);
+ idr_destroy(&query_idr);
}
module_init(ib_sa_init);
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