[PATCH for-3.17 4/5] ib/mad: add new ioctl to user space to support new registration options

ira.weiny-ral2JQCrhuEAvxtiuMwx3w
2014-08-08T23:00:55Z

Registrations options are specified through flags. Definitions of flags will
be in subsequent patches.

Signed-off-by: Ira Weiny <ira.weiny-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>

---
Documentation/infiniband/user_mad.txt | 13 ++--
drivers/infiniband/core/agent.c | 4 +-
drivers/infiniband/core/cm.c | 5 +-
drivers/infiniband/core/mad.c | 4 +-
drivers/infiniband/core/sa_query.c | 2 +-
drivers/infiniband/core/user_mad.c | 120 +++++++++++++++++++++++++++++++-
drivers/infiniband/hw/mlx4/mad.c | 2 +-
drivers/infiniband/hw/mthca/mthca_mad.c | 2 +-
drivers/infiniband/hw/qib/qib_mad.c | 2 +-
drivers/infiniband/ulp/srpt/ib_srpt.c | 2 +-
include/rdma/ib_mad.h | 7 +-
include/uapi/rdma/ib_user_mad.h | 39 +++++++++++
12 files changed, 186 insertions(+), 16 deletions(-)

diff --git a/Documentation/infiniband/user_mad.txt b/Documentation/infiniband/user_mad.txt
index 8a36695..7aca13a 100644
--- a/Documentation/infiniband/user_mad.txt
+++ b/Documentation/infiniband/user_mad.txt
@@ -26,6 +26,11 @@ Creating MAD agents
ioctl. Also, all agents registered through a file descriptor will
be unregistered when the descriptor is closed.

+ 2014 -- a new registration ioctl is now provided which allows additional
+ fields to be provided during registration.
+ Users of this registration call are implicitly setting the use of
+ pkey_index (see below).
+
Receiving MADs

MADs are received using read(). The receive side now supports
@@ -104,10 +109,10 @@ P_Key Index Handling
The old ib_umad interface did not allow setting the P_Key index for
MADs that are sent and did not provide a way for obtaining the P_Key
index of received MADs. A new layout for struct ib_user_mad_hdr
- with a pkey_index member has been defined; however, to preserve
- binary compatibility with older applications, this new layout will
- not be used unless the IB_USER_MAD_ENABLE_PKEY ioctl is called
- before a file descriptor is used for anything else.
+ with a pkey_index member has been defined; however, to preserve binary
+ compatibility with older applications, this new layout will not be used
+ unless one of IB_USER_MAD_ENABLE_PKEY or IB_USER_MAD_REGISTER_AGENT2 ioctl's
+ are called before a file descriptor is used for anything else.

In September 2008, the IB_USER_MAD_ABI_VERSION will be incremented
to 6, the new layout of struct ib_user_mad_hdr will be used by
diff --git a/drivers/infiniband/core/agent.c b/drivers/infiniband/core/agent.c
index 8e32c5a..f6d2961 100644
--- a/drivers/infiniband/core/agent.c
+++ b/drivers/infiniband/core/agent.c
@@ -161,7 +161,7 @@ int ib_agent_port_open(struct ib_device *device, int port_num)
port_priv->agent[0] = ib_register_mad_agent(device, port_num,
IB_QPT_SMI, NULL, 0,
&agent_send_handler,
- NULL, NULL);
+ NULL, NULL, 0);
if (IS_ERR(port_priv->agent[0])) {
ret = PTR_ERR(port_priv->agent[0]);
goto error2;
@@ -172,7 +172,7 @@ int ib_agent_port_open(struct ib_device *device, int port_num)
port_priv->agent[1] = ib_register_mad_agent(device, port_num,
IB_QPT_GSI, NULL, 0,
&agent_send_handler,
- NULL, NULL);
+ NULL, NULL, 0);
if (IS_ERR(port_priv->agent[1])) {
ret = PTR_ERR(port_priv->agent[1]);
goto error3;
diff --git a/drivers/infiniband/core/cm.c b/drivers/infiniband/core/cm.c
index c323917..e28a494 100644
--- a/drivers/infiniband/core/cm.c
+++ b/drivers/infiniband/core/cm.c
@@ -3753,7 +3753,7 @@ static void cm_add_one(struct ib_device *ib_device)
struct cm_port *port;
struct ib_mad_reg_req reg_req = {
.mgmt_class = IB_MGMT_CLASS_CM,
- .mgmt_class_version = IB_CM_CLASS_VERSION
+ .mgmt_class_version = IB_CM_CLASS_VERSION,
};
struct ib_port_modify port_modify = {
.set_port_cap_mask = IB_PORT_CM_SUP
@@ -3801,7 +3801,8 @@ static void cm_add_one(struct ib_device *ib_device)
0,
cm_send_handler,
cm_recv_handler,
- port);
+ port,
+ 0);
if (IS_ERR(port->mad_agent))
goto error2;

diff --git a/drivers/infiniband/core/mad.c b/drivers/infiniband/core/mad.c
index 63f9457..547606b 100644
--- a/drivers/infiniband/core/mad.c
+++ b/drivers/infiniband/core/mad.c
@@ -198,7 +198,8 @@ struct ib_mad_agent *ib_register_mad_agent(struct ib_device *device,
u8 rmpp_version,
ib_mad_send_handler send_handler,
ib_mad_recv_handler recv_handler,
- void *context)
+ void *context,
+ u32 registration_flags)
{
struct ib_mad_port_private *port_priv;
struct ib_mad_agent *ret = ERR_PTR(-EINVAL);
@@ -359,6 +360,7 @@ struct ib_mad_agent *ib_register_mad_agent(struct ib_device *device,
mad_agent_priv->agent.context = context;
mad_agent_priv->agent.qp = port_priv->qp_info[qpn].qp;
mad_agent_priv->agent.port_num = port_num;
+ mad_agent_priv->agent.flags = registration_flags;
spin_lock_init(&mad_agent_priv->lock);
INIT_LIST_HEAD(&mad_agent_priv->send_list);
INIT_LIST_HEAD(&mad_agent_priv->wait_list);
diff --git a/drivers/infiniband/core/sa_query.c b/drivers/infiniband/core/sa_query.c
index 233eaf5..c38f030 100644
--- a/drivers/infiniband/core/sa_query.c
+++ b/drivers/infiniband/core/sa_query.c
@@ -1184,7 +1184,7 @@ static void ib_sa_add_one(struct ib_device *device)
sa_dev->port[i].agent =
ib_register_mad_agent(device, i + s, IB_QPT_GSI,
NULL, 0, send_handler,
- recv_handler, sa_dev);
+ recv_handler, sa_dev, 0);
if (IS_ERR(sa_dev->port[i].agent))
goto err;

diff --git a/drivers/infiniband/core/user_mad.c b/drivers/infiniband/core/user_mad.c
index ea90a3e..11af1c6 100644
--- a/drivers/infiniband/core/user_mad.c
+++ b/drivers/infiniband/core/user_mad.c
@@ -647,6 +647,7 @@ static int ib_umad_reg_agent(struct ib_umad_file *file, void __user *arg,

found:
if (ureq.mgmt_class) {
+ memset(&req, 0, sizeof(req));
req.mgmt_class = ureq.mgmt_class;
req.mgmt_class_version = ureq.mgmt_class_version;
memcpy(req.oui, ureq.oui, sizeof req.oui);
@@ -667,7 +668,7 @@ found:
ureq.qpn ? IB_QPT_GSI : IB_QPT_SMI,
ureq.mgmt_class ? &req : NULL,
ureq.rmpp_version,
- send_handler, recv_handler, file);
+ send_handler, recv_handler, file, 0);
if (IS_ERR(agent)) {
ret = PTR_ERR(agent);
agent = NULL;
@@ -705,6 +706,119 @@ out:
return ret;
}

+static int ib_umad_reg_agent2(struct ib_umad_file *file, void __user *arg)
+{
+ struct ib_user_mad_reg_req2 ureq;
+ struct ib_mad_reg_req req;
+ struct ib_mad_agent *agent = NULL;
+ int agent_id;
+ int ret;
+
+ mutex_lock(&file->port->file_mutex);
+ mutex_lock(&file->mutex);
+
+ if (!file->port->ib_dev) {
+ dev_notice(file->port->dev,
+ "ib_umad_reg_agent2: invalid device\n");
+ ret = -EPIPE;
+ goto out;
+ }
+
+ if (copy_from_user(&ureq, arg, sizeof(ureq))) {
+ ret = -EFAULT;
+ goto out;
+ }
+
+ if (ureq.qpn != 0 && ureq.qpn != 1) {
+ dev_notice(file->port->dev,
+ "ib_umad_reg_agent2: invalid QPN %d specified\n",
+ ureq.qpn);
+ ret = -EINVAL;
+ goto out;
+ }
+
+ if (ureq.flags & ~IB_USER_MAD_REG_FLAGS_CAP) {
+ dev_notice(file->port->dev,
+ "ib_umad_reg_agent2 failed: invalid registration flags specified 0x%x; supported 0x%x\n",
+ ureq.flags, IB_USER_MAD_REG_FLAGS_CAP);
+ ret = -EINVAL;
+
+ if (put_user((u32)IB_USER_MAD_REG_FLAGS_CAP,
+ (u32 __user *) (arg + offsetof(struct
+ ib_user_mad_reg_req2, flags))))
+ ret = -EFAULT;
+
+ goto out;
+ }
+
+ for (agent_id = 0; agent_id < IB_UMAD_MAX_AGENTS; ++agent_id)
+ if (!__get_agent(file, agent_id))
+ goto found;
+
+ dev_notice(file->port->dev,
+ "ib_umad_reg_agent2: Max Agents (%u) reached\n",
+ IB_UMAD_MAX_AGENTS);
+ ret = -ENOMEM;
+ goto out;
+
+found:
+ if (ureq.mgmt_class) {
+ memset(&req, 0, sizeof(req));
+ req.mgmt_class = ureq.mgmt_class;
+ req.mgmt_class_version = ureq.mgmt_class_version;
+ if (ureq.oui & 0xff000000) {
+ dev_notice(file->port->dev,
+ "ib_umad_reg_agent2 failed: oui invalid 0x%08x\n",
+ ureq.oui);
+ ret = -EINVAL;
+ goto out;
+ }
+ req.oui[2] = ureq.oui & 0x0000ff;
+ req.oui[1] = (ureq.oui & 0x00ff00) >> 8;
+ req.oui[0] = (ureq.oui & 0xff0000) >> 16;
+ memcpy(req.method_mask, ureq.method_mask,
+ sizeof(req.method_mask));
+ }
+
+ agent = ib_register_mad_agent(file->port->ib_dev, file->port->port_num,
+ ureq.qpn ? IB_QPT_GSI : IB_QPT_SMI,
+ ureq.mgmt_class ? &req : NULL,
+ ureq.rmpp_version,
+ send_handler, recv_handler, file,
+ ureq.flags);
+ if (IS_ERR(agent)) {
+ ret = PTR_ERR(agent);
+ agent = NULL;
+ goto out;
+ }
+
+ if (put_user(agent_id,
+ (u32 __user *)(arg +
+ offsetof(struct ib_user_mad_reg_req2, id)))) {
+ ret = -EFAULT;
+ goto out;
+ }
+
+ if (!file->already_used) {
+ file->already_used = 1;
+ file->use_pkey_index = 1;
+ }
+
+ file->agent[agent_id] = agent;
+ ret = 0;
+
+out:
+ mutex_unlock(&file->mutex);
+
+ if (ret && agent)
+ ib_unregister_mad_agent(agent);
+
+ mutex_unlock(&file->port->file_mutex);
+
+ return ret;
+}
+
+
static int ib_umad_unreg_agent(struct ib_umad_file *file, u32 __user *arg)
{
struct ib_mad_agent *agent = NULL;
@@ -760,6 +874,8 @@ static long ib_umad_ioctl(struct file *filp, unsigned int cmd,
return ib_umad_unreg_agent(filp->private_data, (__u32 __user *) arg);
case IB_USER_MAD_ENABLE_PKEY:
return ib_umad_enable_pkey(filp->private_data);
+ case IB_USER_MAD_REGISTER_AGENT2:
+ return ib_umad_reg_agent2(filp->private_data, (void __user *) arg);
default:
return -ENOIOCTLCMD;
}
@@ -776,6 +892,8 @@ static long ib_umad_compat_ioctl(struct file *filp, unsigned int cmd,
return ib_umad_unreg_agent(filp->private_data, compat_ptr(arg));
case IB_USER_MAD_ENABLE_PKEY:
return ib_umad_enable_pkey(filp->private_data);
+ case IB_USER_MAD_REGISTER_AGENT2:
+ return ib_umad_reg_agent2(filp->private_data, compat_ptr(arg));
default:
return -ENOIOCTLCMD;
}
diff --git a/drivers/infiniband/hw/mlx4/mad.c b/drivers/infiniband/hw/mlx4/mad.c
index 287ad05..82a7dd8 100644
--- a/drivers/infiniband/hw/mlx4/mad.c
+++ b/drivers/infiniband/hw/mlx4/mad.c
@@ -891,7 +891,7 @@ int mlx4_ib_mad_init(struct mlx4_ib_dev *dev)
agent = ib_register_mad_agent(&dev->ib_dev, p + 1,
q ? IB_QPT_GSI : IB_QPT_SMI,
NULL, 0, send_handler,
- NULL, NULL);
+ NULL, NULL, 0);
if (IS_ERR(agent)) {
ret = PTR_ERR(agent);
goto err;
diff --git a/drivers/infiniband/hw/mthca/mthca_mad.c b/drivers/infiniband/hw/mthca/mthca_mad.c
index b6f7f45..8881fa3 100644
--- a/drivers/infiniband/hw/mthca/mthca_mad.c
+++ b/drivers/infiniband/hw/mthca/mthca_mad.c
@@ -294,7 +294,7 @@ int mthca_create_agents(struct mthca_dev *dev)
agent = ib_register_mad_agent(&dev->ib_dev, p + 1,
q ? IB_QPT_GSI : IB_QPT_SMI,
NULL, 0, send_handler,
- NULL, NULL);
+ NULL, NULL, 0);
if (IS_ERR(agent)) {
ret = PTR_ERR(agent);
goto err;
diff --git a/drivers/infiniband/hw/qib/qib_mad.c b/drivers/infiniband/hw/qib/qib_mad.c
index 22c720e..636be11 100644
--- a/drivers/infiniband/hw/qib/qib_mad.c
+++ b/drivers/infiniband/hw/qib/qib_mad.c
@@ -2476,7 +2476,7 @@ int qib_create_agents(struct qib_ibdev *dev)
ibp = &dd->pport[p].ibport_data;
agent = ib_register_mad_agent(&dev->ibdev, p + 1, IB_QPT_SMI,
NULL, 0, send_handler,
- NULL, NULL);
+ NULL, NULL, 0);
if (IS_ERR(agent)) {
ret = PTR_ERR(agent);
goto err;
diff --git a/drivers/infiniband/ulp/srpt/ib_srpt.c b/drivers/infiniband/ulp/srpt/ib_srpt.c
index fe09f27..8a8311e 100644
--- a/drivers/infiniband/ulp/srpt/ib_srpt.c
+++ b/drivers/infiniband/ulp/srpt/ib_srpt.c
@@ -563,7 +563,7 @@ static int srpt_refresh_port(struct srpt_port *sport)
&reg_req, 0,
srpt_mad_send_handler,
srpt_mad_recv_handler,
- sport);
+ sport, 0);
if (IS_ERR(sport->mad_agent)) {
ret = PTR_ERR(sport->mad_agent);
sport->mad_agent = NULL;
diff --git a/include/rdma/ib_mad.h b/include/rdma/ib_mad.h
index 3d81b90..876f497 100644
--- a/include/rdma/ib_mad.h
+++ b/include/rdma/ib_mad.h
@@ -355,6 +355,7 @@ typedef void (*ib_mad_recv_handler)(struct ib_mad_agent *mad_agent,
* @hi_tid: Access layer assigned transaction ID for this client.
* Unsolicited MADs sent by this client will have the upper 32-bits
* of their TID set to this value.
+ * @flags: registration flags
* @port_num: Port number on which QP is registered
* @rmpp_version: If set, indicates the RMPP version used by this agent.
*/
@@ -367,6 +368,7 @@ struct ib_mad_agent {
ib_mad_snoop_handler snoop_handler;
void *context;
u32 hi_tid;
+ u32 flags;
u8 port_num;
u8 rmpp_version;
};
@@ -426,6 +428,7 @@ struct ib_mad_recv_wc {
* in the range from 0x30 to 0x4f. Otherwise not used.
* @method_mask: The caller will receive unsolicited MADs for any method
* where @method_mask = 1.
+ *
*/
struct ib_mad_reg_req {
u8 mgmt_class;
@@ -451,6 +454,7 @@ struct ib_mad_reg_req {
* @recv_handler: The completion callback routine invoked for a received
* MAD.
* @context: User specified context associated with the registration.
+ * @registration_flags: Registration flags to set for this agent
*/
struct ib_mad_agent *ib_register_mad_agent(struct ib_device *device,
u8 port_num,
@@ -459,7 +463,8 @@ struct ib_mad_agent *ib_register_mad_agent(struct ib_device *device,
u8 rmpp_version,
ib_mad_send_handler send_handler,
ib_mad_recv_handler recv_handler,
- void *context);
+ void *context,
+ u32 registration_flags);

enum ib_mad_snoop_flags {
/*IB_MAD_SNOOP_POSTED_SENDS = 1,*/
diff --git a/include/uapi/rdma/ib_user_mad.h b/include/uapi/rdma/ib_user_mad.h
index d6fce1c..c00b081 100644
--- a/include/uapi/rdma/ib_user_mad.h
+++ b/include/uapi/rdma/ib_user_mad.h
@@ -191,6 +191,42 @@ struct ib_user_mad_reg_req {
__u8 rmpp_version;
};

+/**
+ * ib_user_mad_reg_req2 - MAD registration request
+ *
+ * @id - Set by the _kernel_; used by userspace to identify the
+ * registered agent in future requests.
+ * @qpn - Queue pair number; must be 0 or 1.
+ * @mgmt_class - Indicates which management class of MADs should be
+ * receive by the caller. This field is only required if
+ * the user wishes to receive unsolicited MADs, otherwise
+ * it should be 0.
+ * @mgmt_class_version - Indicates which version of MADs for the given
+ * management class to receive.
+ * @res - Ignored.
+ * @flags - additional registration flags; Must be in the set of
+ * flags defined in IB_USER_MAD_REG_FLAGS_CAP
+ * @method_mask - The caller wishes to receive unsolicited MADs for the
+ * methods whose bit(s) is(are) set.
+ * @oui - Indicates IEEE OUI to use when mgmt_class is a vendor
+ * class in the range from 0x30 to 0x4f. Otherwise not
+ * used.
+ * @rmpp_version - If set, indicates the RMPP version to use.
+ */
+#define IB_USER_MAD_REG_FLAGS_CAP (0)
+struct ib_user_mad_reg_req2 {
+ __u32 id;
+ __u32 qpn;
+ __u8 mgmt_class;
+ __u8 mgmt_class_version;
+ __u16 res;
+ __u32 flags;
+ __u64 method_mask[2];
+ __u32 oui;
+ __u8 rmpp_version;
+ __u8 reserved[3];
+};
+
#define IB_IOCTL_MAGIC 0x1b

#define IB_USER_MAD_REGISTER_AGENT _IOWR(IB_IOCTL_MAGIC, 1, \
@@ -200,4 +236,7 @@ struct ib_user_mad_reg_req {

#define IB_USER_MAD_ENABLE_PKEY _IO(IB_IOCTL_MAGIC, 3)

+#define IB_USER_MAD_REGISTER_AGENT2 _IOWR(IB_IOCTL_MAGIC, 4, \
+ struct ib_user_mad_reg_req2)
+
#endif /* IB_USER_MAD_H */