[PATCH v2 00/19] IB/hfi1,rdmavt,core: Patches for-next

[PATCH v2 00/19] IB/hfi1,rdmavt,core: Patches for-next

[Dennis Dalessandro]

Doug,

Here are some patches for the next release. It includes the core fix that did
not apply from my last series. Other than that this is the usual bug fixes
and some minor clean ups.

Patches apply on top of your for-4.12 branch and can also be found in my
GitHub repo at: https://github.com/ddalessa/kernel/tree/for-4.12

---

Changes since V1:
* Dropped: [02/20] IB/hfi1: Remove hyper-thread siblings by walking CPU mask
* Fixed a scheduling while atomic bug in update_synth_timer

---

Dasaratharaman Chandramouli (1):
      IB/hfi1: Rename hdr2sc to hfi1_9B_get_sc5

Dennis Dalessandro (4):
      IB/hfi1: Fix misspelling in comment
      IB/hfi1: Convert %Lx to %llx
      IB/hfi1: Fix unbalanced braces around else
      IB/hfi1: Use bool in process_ecn

Don Hiatt (2):
      IB/hfi1: Add functions to parse 9B headers
      IB/hfi1: Use defines from common headers

Ira Weiny (1):
      IB/hfi: Protect against writable mmap

Michael J. Ruhl (5):
      IB/core: If the MGID/MLID pair is not on the list return an error
      IB/hfi1: Correct MulticastMask/CollectiveMask info to SMA output
      IB/core: For multicast functions, verify that LIDs are multicast LIDs
      IB/rdmavt/hfi1/qib: Use the MGID and MLID for multicast addressing
      IB/hfi1: Validate the TID count before using it

Mike Marciniszyn (1):
      IB/hfi1: Prevent kernel QP post send hard lockups

Neel Desai (2):
      IB/hfi1: Adjust high temperature warning for QSFP cable
      IB/hfi1: Permanently enable P_Key checking in HFI

Sebastian Sanchez (1):
      IB/hfi1: Return SC2VL mappings to FM with VL15 instead of ILLEGAL_VL

Stuart Summers (1):
      IB/hfi1: Cache neighbor secure data after link up

Tadeusz Struk (1):
      IB/hfi1: Fix softlockup issue


 drivers/infiniband/core/uverbs_cmd.c      |   13 ++-
 drivers/infiniband/core/verbs.c           |    8 +-
 drivers/infiniband/hw/hfi1/chip.c         |  121 ++++++++++++++---------------
 drivers/infiniband/hw/hfi1/common.h       |   15 ++--
 drivers/infiniband/hw/hfi1/driver.c       |   28 +++----
 drivers/infiniband/hw/hfi1/file_ops.c     |    4 +
 drivers/infiniband/hw/hfi1/hfi.h          |   27 ++++--
 drivers/infiniband/hw/hfi1/init.c         |   11 ++-
 drivers/infiniband/hw/hfi1/intr.c         |   27 ++++--
 drivers/infiniband/hw/hfi1/mad.c          |   56 +++++++------
 drivers/infiniband/hw/hfi1/pcie.c         |    2 
 drivers/infiniband/hw/hfi1/rc.c           |   19 ++---
 drivers/infiniband/hw/hfi1/ruc.c          |   52 +++++++-----
 drivers/infiniband/hw/hfi1/trace.c        |    5 -
 drivers/infiniband/hw/hfi1/trace_ibhdrs.h |    8 +-
 drivers/infiniband/hw/hfi1/uc.c           |    8 +-
 drivers/infiniband/hw/hfi1/ud.c           |   18 ++--
 drivers/infiniband/hw/hfi1/user_exp_rcv.c |    3 +
 drivers/infiniband/hw/hfi1/verbs.c        |   16 ++--
 drivers/infiniband/hw/hfi1/verbs.h        |    6 +
 drivers/infiniband/hw/qib/qib_verbs.c     |    2 
 drivers/infiniband/sw/rdmavt/mcast.c      |   61 +++++++++++----
 include/rdma/ib_hdrs.h                    |   66 ++++++++++++++++
 include/rdma/rdma_vt.h                    |    3 -
 include/rdma/rdmavt_qp.h                  |    7 +-
 25 files changed, 363 insertions(+), 223 deletions(-)

[PATCH v2 00/19] IB/hfi1,rdmavt,core: Patches for-next

[Dennis Dalessandro]

Doug,

Here are some patches for the next release. It includes the core fix that did
not apply from my last series. Other than that this is the usual bug fixes
and some minor clean ups.

Patches apply on top of your for-4.12 branch and can also be found in my
GitHub repo at: https://github.com/ddalessa/kernel/tree/for-4.12

---

Changes since V1:
* Dropped: [02/20] IB/hfi1: Remove hyper-thread siblings by walking CPU mask
* Fixed a scheduling while atomic bug in update_synth_timer

---

Dasaratharaman Chandramouli (1):
      IB/hfi1: Rename hdr2sc to hfi1_9B_get_sc5

Dennis Dalessandro (4):
      IB/hfi1: Fix misspelling in comment
      IB/hfi1: Convert %Lx to %llx
      IB/hfi1: Fix unbalanced braces around else
      IB/hfi1: Use bool in process_ecn

Don Hiatt (2):
      IB/hfi1: Add functions to parse 9B headers
      IB/hfi1: Use defines from common headers

Ira Weiny (1):
      IB/hfi: Protect against writable mmap

Michael J. Ruhl (5):
      IB/core: If the MGID/MLID pair is not on the list return an error
      IB/hfi1: Correct MulticastMask/CollectiveMask info to SMA output
      IB/core: For multicast functions, verify that LIDs are multicast LIDs
      IB/rdmavt/hfi1/qib: Use the MGID and MLID for multicast addressing
      IB/hfi1: Validate the TID count before using it

Mike Marciniszyn (1):
      IB/hfi1: Prevent kernel QP post send hard lockups

Neel Desai (2):
      IB/hfi1: Adjust high temperature warning for QSFP cable
      IB/hfi1: Permanently enable P_Key checking in HFI

Sebastian Sanchez (1):
      IB/hfi1: Return SC2VL mappings to FM with VL15 instead of ILLEGAL_VL

Stuart Summers (1):
      IB/hfi1: Cache neighbor secure data after link up

Tadeusz Struk (1):
      IB/hfi1: Fix softlockup issue


 drivers/infiniband/core/uverbs_cmd.c      |   13 ++-
 drivers/infiniband/core/verbs.c           |    8 +-
 drivers/infiniband/hw/hfi1/chip.c         |  121 ++++++++++++++---------------
 drivers/infiniband/hw/hfi1/common.h       |   15 ++--
 drivers/infiniband/hw/hfi1/driver.c       |   28 +++----
 drivers/infiniband/hw/hfi1/file_ops.c     |    4 +
 drivers/infiniband/hw/hfi1/hfi.h          |   27 ++++--
 drivers/infiniband/hw/hfi1/init.c         |   11 ++-
 drivers/infiniband/hw/hfi1/intr.c         |   27 ++++--
 drivers/infiniband/hw/hfi1/mad.c          |   56 +++++++------
 drivers/infiniband/hw/hfi1/pcie.c         |    2 
 drivers/infiniband/hw/hfi1/rc.c           |   19 ++---
 drivers/infiniband/hw/hfi1/ruc.c          |   52 +++++++-----
 drivers/infiniband/hw/hfi1/trace.c        |    5 -
 drivers/infiniband/hw/hfi1/trace_ibhdrs.h |    8 +-
 drivers/infiniband/hw/hfi1/uc.c           |    8 +-
 drivers/infiniband/hw/hfi1/ud.c           |   18 ++--
 drivers/infiniband/hw/hfi1/user_exp_rcv.c |    3 +
 drivers/infiniband/hw/hfi1/verbs.c        |   16 ++--
 drivers/infiniband/hw/hfi1/verbs.h        |    6 +
 drivers/infiniband/hw/qib/qib_verbs.c     |    2 
 drivers/infiniband/sw/rdmavt/mcast.c      |   61 +++++++++++----
 include/rdma/ib_hdrs.h                    |   66 ++++++++++++++++
 include/rdma/rdma_vt.h                    |    3 -
 include/rdma/rdmavt_qp.h                  |    7 +-
 25 files changed, 363 insertions(+), 223 deletions(-)

--
Signature

[PATCH v2 01/19] IB/core: If the MGID/MLID pair is not on the list return an error

[Dennis Dalessandro]

From: Michael J. Ruhl <michael.j.ruhl-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>

A list of MGID/MLID pairs is built when doing a multicast attach.  When
the multicast detach is called, the list is searched, and regardless of
the search outcome, the driver detach is called.

If an MGID/MLID pair is not on the list, driver detach should not be
called, and an error should be returned.  Calling the driver without
removing an MGID/MLID pair from the list can leave the core and driver
out of sync.

Fixes: f4e401562c11 ("IB/uverbs: track multicast group membership for userspace QPs")
Cc: stable-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Reviewed-by: Ira Weiny <ira.weiny-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Reviewed-by: Leon Romanovsky <leonro-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
Signed-off-by: Michael J. Ruhl <michael.j.ruhl-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
---
 drivers/infiniband/core/uverbs_cmd.c |   13 +++++++++----
 1 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c
index b9024fa..27fcbeb 100644
--- a/drivers/infiniband/core/uverbs_cmd.c
+++ b/drivers/infiniband/core/uverbs_cmd.c
@@ -2647,6 +2647,7 @@ ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
 	struct ib_qp                 *qp;
 	struct ib_uverbs_mcast_entry *mcast;
 	int                           ret = -EINVAL;
+	bool                          found = false;
 
 	if (copy_from_user(&cmd, buf, sizeof cmd))
 		return -EFAULT;
@@ -2658,18 +2659,22 @@ ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
 	obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
 	mutex_lock(&obj->mcast_lock);
 
-	ret = ib_detach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid);
-	if (ret)
-		goto out_put;
-
 	list_for_each_entry(mcast, &obj->mcast_list, list)
 		if (cmd.mlid == mcast->lid &&
 		    !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
 			list_del(&mcast->list);
 			kfree(mcast);
+			found = true;
 			break;
 		}
 
+	if (!found) {
+		ret = -EINVAL;
+		goto out_put;
+	}
+
+	ret = ib_detach_mcast(qp, (union ib_gid *)cmd.gid, cmd.mlid);
+
 out_put:
 	mutex_unlock(&obj->mcast_lock);
 	uobj_put_obj_read(qp);

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[PATCH v2 01/19] IB/core: If the MGID/MLID pair is not on the list return an error

[Dennis Dalessandro]

From: Michael J. Ruhl <michael.j.ruhl@intel.com>

A list of MGID/MLID pairs is built when doing a multicast attach.  When
the multicast detach is called, the list is searched, and regardless of
the search outcome, the driver detach is called.

If an MGID/MLID pair is not on the list, driver detach should not be
called, and an error should be returned.  Calling the driver without
removing an MGID/MLID pair from the list can leave the core and driver
out of sync.

Fixes: f4e401562c11 ("IB/uverbs: track multicast group membership for userspace QPs")
Cc: stable@vger.kernel.org
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
---
 drivers/infiniband/core/uverbs_cmd.c |   13 +++++++++----
 1 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c
index b9024fa..27fcbeb 100644
--- a/drivers/infiniband/core/uverbs_cmd.c
+++ b/drivers/infiniband/core/uverbs_cmd.c
@@ -2647,6 +2647,7 @@ ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
 	struct ib_qp                 *qp;
 	struct ib_uverbs_mcast_entry *mcast;
 	int                           ret = -EINVAL;
+	bool                          found = false;
 
 	if (copy_from_user(&cmd, buf, sizeof cmd))
 		return -EFAULT;
@@ -2658,18 +2659,22 @@ ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
 	obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
 	mutex_lock(&obj->mcast_lock);
 
-	ret = ib_detach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid);
-	if (ret)
-		goto out_put;
-
 	list_for_each_entry(mcast, &obj->mcast_list, list)
 		if (cmd.mlid == mcast->lid &&
 		    !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
 			list_del(&mcast->list);
 			kfree(mcast);
+			found = true;
 			break;
 		}
 
+	if (!found) {
+		ret = -EINVAL;
+		goto out_put;
+	}
+
+	ret = ib_detach_mcast(qp, (union ib_gid *)cmd.gid, cmd.mlid);
+
 out_put:
 	mutex_unlock(&obj->mcast_lock);
 	uobj_put_obj_read(qp);

[PATCH v2 02/19] IB/hfi1: Correct MulticastMask/CollectiveMask info to SMA output

[Dennis Dalessandro]

From: Michael J. Ruhl <michael.j.ruhl-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>

The FM uses the values of MulticastMask and CollectiveMask to
determine the number of bits for net masks. The current values of
0 and 0 are incorrect.  The values should be 4 and 1.  Updated the
necessary code to reflect the specified values.

Reviewed-by: Sebastian Sanchez <sebastian.sanchez-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Michael J. Ruhl <michael.j.ruhl-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
---
 drivers/infiniband/hw/hfi1/common.h |    9 +++++++++
 drivers/infiniband/hw/hfi1/mad.c    |    5 +++++
 2 files changed, 14 insertions(+), 0 deletions(-)

diff --git a/drivers/infiniband/hw/hfi1/common.h b/drivers/infiniband/hw/hfi1/common.h
index 1b783bb..804150f 100644
--- a/drivers/infiniband/hw/hfi1/common.h
+++ b/drivers/infiniband/hw/hfi1/common.h
@@ -338,6 +338,15 @@ struct diag_pkt {
 #define HFI1_BECN_MASK 1
 #define HFI1_BECN_SMASK BIT(HFI1_BECN_SHIFT)
 
+/**
+ * 0xF8 - 4 bits of multicast range and 1 bit for collective range
+ * Example: For 24 bit LID space,
+ * Multicast range: 0xF00000 to 0xF7FFFF
+ * Collective range: 0xF80000 to 0xFFFFFE
+ */
+#define HFI1_MCAST_NR 0x4 /* Number of top bits set */
+#define HFI1_COLLECTIVE_NR 0x1 /* Number of bits after MCAST_NR */
+
 #define HFI1_PSM_IOC_BASE_SEQ 0x0
 
 static inline __u64 rhf_to_cpu(const __le32 *rbuf)
diff --git a/drivers/infiniband/hw/hfi1/mad.c b/drivers/infiniband/hw/hfi1/mad.c
index 09cda3c..de34131 100644
--- a/drivers/infiniband/hw/hfi1/mad.c
+++ b/drivers/infiniband/hw/hfi1/mad.c
@@ -702,6 +702,11 @@ static int __subn_get_opa_portinfo(struct opa_smp *smp, u32 am, u8 *data,
 	pi->buffer_units = cpu_to_be32(buffer_units);
 
 	pi->opa_cap_mask = cpu_to_be16(OPA_CAP_MASK3_IsSharedSpaceSupported);
+	/* Driver does not support mcast/collective configuration */
+	pi->opa_cap_mask &=
+		cpu_to_be16(~OPA_CAP_MASK3_IsAddrRangeConfigSupported);
+	pi->collectivemask_multicastmask = ((HFI1_COLLECTIVE_NR & 0x7)
+					    << 3 | (HFI1_MCAST_NR & 0x7));
 
 	/* HFI supports a replay buffer 128 LTPs in size */
 	pi->replay_depth.buffer = 0x80;

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[PATCH v2 03/19] IB/core: For multicast functions, verify that LIDs are multicast LIDs

[Dennis Dalessandro]

From: Michael J. Ruhl <michael.j.ruhl@intel.com>

The Infiniband spec defines "A multicast address is defined by a
MGID and a MLID" (section 10.5).  Currently the MLID value is not
validated.

Add check to verify that the MLID value is in the correct address
range.

Fixes: 0c33aeedb2cf ("[IB] Add checks to multicast attach and detach")
Cc: stable@vger.kernel.org
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Dasaratharaman Chandramouli <dasaratharaman.chandramouli@intel.com>
Signed-off-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
---
 drivers/infiniband/core/verbs.c |    8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c
index 85ed505..207e5c2 100644
--- a/drivers/infiniband/core/verbs.c
+++ b/drivers/infiniband/core/verbs.c
@@ -1519,7 +1519,9 @@ int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
 
 	if (!qp->device->attach_mcast)
 		return -ENOSYS;
-	if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD)
+	if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD ||
+	    lid < be16_to_cpu(IB_MULTICAST_LID_BASE) ||
+	    lid == be16_to_cpu(IB_LID_PERMISSIVE))
 		return -EINVAL;
 
 	ret = qp->device->attach_mcast(qp, gid, lid);
@@ -1535,7 +1537,9 @@ int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
 
 	if (!qp->device->detach_mcast)
 		return -ENOSYS;
-	if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD)
+	if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD ||
+	    lid < be16_to_cpu(IB_MULTICAST_LID_BASE) ||
+	    lid == be16_to_cpu(IB_LID_PERMISSIVE))
 		return -EINVAL;
 
 	ret = qp->device->detach_mcast(qp, gid, lid);

[PATCH v2 04/19] IB/rdmavt/hfi1/qib: Use the MGID and MLID for multicast addressing

[Dennis Dalessandro]

From: Michael J. Ruhl <michael.j.ruhl-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>

The Infiniband spec defines "A multicast address is defined by a
MGID and a MLID" (section 10.5).

The current code only uses the MGID for identifying multicast groups.
Update the driver to be compliant with this definition.

Reviewed-by: Ira Weiny <ira.weiny-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Reviewed-by: Dasaratharaman Chandramouli <dasaratharaman.chandramouli-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Michael J. Ruhl <michael.j.ruhl-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
---
 drivers/infiniband/hw/hfi1/verbs.c    |    2 +
 drivers/infiniband/hw/qib/qib_verbs.c |    2 +
 drivers/infiniband/sw/rdmavt/mcast.c  |   61 ++++++++++++++++++++++++---------
 include/rdma/rdma_vt.h                |    3 +-
 include/rdma/rdmavt_qp.h              |    7 +++-
 5 files changed, 54 insertions(+), 21 deletions(-)

diff --git a/drivers/infiniband/hw/hfi1/verbs.c b/drivers/infiniband/hw/hfi1/verbs.c
index 070a349..f74abb1 100644
--- a/drivers/infiniband/hw/hfi1/verbs.c
+++ b/drivers/infiniband/hw/hfi1/verbs.c
@@ -603,7 +603,7 @@ void hfi1_ib_rcv(struct hfi1_packet *packet)
 
 		if (lnh != HFI1_LRH_GRH)
 			goto drop;
-		mcast = rvt_mcast_find(&ibp->rvp, &hdr->u.l.grh.dgid);
+		mcast = rvt_mcast_find(&ibp->rvp, &hdr->u.l.grh.dgid, lid);
 		if (!mcast)
 			goto drop;
 		list_for_each_entry_rcu(p, &mcast->qp_list, list) {
diff --git a/drivers/infiniband/hw/qib/qib_verbs.c b/drivers/infiniband/hw/qib/qib_verbs.c
index e120efe..68d449c 100644
--- a/drivers/infiniband/hw/qib/qib_verbs.c
+++ b/drivers/infiniband/hw/qib/qib_verbs.c
@@ -356,7 +356,7 @@ void qib_ib_rcv(struct qib_ctxtdata *rcd, void *rhdr, void *data, u32 tlen)
 
 		if (lnh != QIB_LRH_GRH)
 			goto drop;
-		mcast = rvt_mcast_find(&ibp->rvp, &hdr->u.l.grh.dgid);
+		mcast = rvt_mcast_find(&ibp->rvp, &hdr->u.l.grh.dgid, lid);
 		if (mcast == NULL)
 			goto drop;
 		this_cpu_inc(ibp->pmastats->n_multicast_rcv);
diff --git a/drivers/infiniband/sw/rdmavt/mcast.c b/drivers/infiniband/sw/rdmavt/mcast.c
index 05c8c2a..1f12b69 100644
--- a/drivers/infiniband/sw/rdmavt/mcast.c
+++ b/drivers/infiniband/sw/rdmavt/mcast.c
@@ -100,10 +100,11 @@ static void rvt_mcast_qp_free(struct rvt_mcast_qp *mqp)
 /**
  * mcast_alloc - allocate the multicast GID structure
  * @mgid: the multicast GID
+ * @lid: the muilticast LID (host order)
  *
  * A list of QPs will be attached to this structure.
  */
-static struct rvt_mcast *rvt_mcast_alloc(union ib_gid *mgid)
+static struct rvt_mcast *rvt_mcast_alloc(union ib_gid *mgid, u16 lid)
 {
 	struct rvt_mcast *mcast;
 
@@ -111,7 +112,9 @@ static void rvt_mcast_qp_free(struct rvt_mcast_qp *mqp)
 	if (!mcast)
 		goto bail;
 
-	mcast->mgid = *mgid;
+	mcast->mcast_addr.mgid = *mgid;
+	mcast->mcast_addr.lid = lid;
+
 	INIT_LIST_HEAD(&mcast->qp_list);
 	init_waitqueue_head(&mcast->wait);
 	atomic_set(&mcast->refcount, 0);
@@ -131,15 +134,19 @@ static void rvt_mcast_free(struct rvt_mcast *mcast)
 }
 
 /**
- * rvt_mcast_find - search the global table for the given multicast GID
+ * rvt_mcast_find - search the global table for the given multicast GID/LID
+ * NOTE: It is valid to have 1 MLID with multiple MGIDs.  It is not valid
+ * to have 1 MGID with multiple MLIDs.
  * @ibp: the IB port structure
  * @mgid: the multicast GID to search for
+ * @lid: the multicast LID portion of the multicast address (host order)
  *
  * The caller is responsible for decrementing the reference count if found.
  *
  * Return: NULL if not found.
  */
-struct rvt_mcast *rvt_mcast_find(struct rvt_ibport *ibp, union ib_gid *mgid)
+struct rvt_mcast *rvt_mcast_find(struct rvt_ibport *ibp, union ib_gid *mgid,
+				 u16 lid)
 {
 	struct rb_node *n;
 	unsigned long flags;
@@ -153,15 +160,18 @@ struct rvt_mcast *rvt_mcast_find(struct rvt_ibport *ibp, union ib_gid *mgid)
 
 		mcast = rb_entry(n, struct rvt_mcast, rb_node);
 
-		ret = memcmp(mgid->raw, mcast->mgid.raw,
-			     sizeof(union ib_gid));
+		ret = memcmp(mgid->raw, mcast->mcast_addr.mgid.raw,
+			     sizeof(*mgid));
 		if (ret < 0) {
 			n = n->rb_left;
 		} else if (ret > 0) {
 			n = n->rb_right;
 		} else {
-			atomic_inc(&mcast->refcount);
-			found = mcast;
+			/* MGID/MLID must match */
+			if (mcast->mcast_addr.lid == lid) {
+				atomic_inc(&mcast->refcount);
+				found = mcast;
+			}
 			break;
 		}
 	}
@@ -177,7 +187,8 @@ struct rvt_mcast *rvt_mcast_find(struct rvt_ibport *ibp, union ib_gid *mgid)
  *
  * Return: zero if both were added.  Return EEXIST if the GID was already in
  * the table but the QP was added.  Return ESRCH if the QP was already
- * attached and neither structure was added.
+ * attached and neither structure was added. Return EINVAL if the MGID was
+ * found, but the MLID did NOT match.
  */
 static int rvt_mcast_add(struct rvt_dev_info *rdi, struct rvt_ibport *ibp,
 			 struct rvt_mcast *mcast, struct rvt_mcast_qp *mqp)
@@ -195,8 +206,9 @@ static int rvt_mcast_add(struct rvt_dev_info *rdi, struct rvt_ibport *ibp,
 		pn = *n;
 		tmcast = rb_entry(pn, struct rvt_mcast, rb_node);
 
-		ret = memcmp(mcast->mgid.raw, tmcast->mgid.raw,
-			     sizeof(union ib_gid));
+		ret = memcmp(mcast->mcast_addr.mgid.raw,
+			     tmcast->mcast_addr.mgid.raw,
+			     sizeof(mcast->mcast_addr.mgid));
 		if (ret < 0) {
 			n = &pn->rb_left;
 			continue;
@@ -206,6 +218,11 @@ static int rvt_mcast_add(struct rvt_dev_info *rdi, struct rvt_ibport *ibp,
 			continue;
 		}
 
+		if (tmcast->mcast_addr.lid != mcast->mcast_addr.lid) {
+			ret = EINVAL;
+			goto bail;
+		}
+
 		/* Search the QP list to see if this is already there. */
 		list_for_each_entry_rcu(p, &tmcast->qp_list, list) {
 			if (p->qp == mqp->qp) {
@@ -276,7 +293,7 @@ int rvt_attach_mcast(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
 	 * Allocate data structures since its better to do this outside of
 	 * spin locks and it will most likely be needed.
 	 */
-	mcast = rvt_mcast_alloc(gid);
+	mcast = rvt_mcast_alloc(gid, lid);
 	if (!mcast)
 		return -ENOMEM;
 
@@ -296,6 +313,10 @@ int rvt_attach_mcast(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
 		/* Exceeded the maximum number of mcast groups. */
 		ret = -ENOMEM;
 		goto bail_mqp;
+	case EINVAL:
+		/* Invalid MGID/MLID pair */
+		ret = -EINVAL;
+		goto bail_mqp;
 	default:
 		break;
 	}
@@ -344,14 +365,20 @@ int rvt_detach_mcast(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
 		}
 
 		mcast = rb_entry(n, struct rvt_mcast, rb_node);
-		ret = memcmp(gid->raw, mcast->mgid.raw,
-			     sizeof(union ib_gid));
-		if (ret < 0)
+		ret = memcmp(gid->raw, mcast->mcast_addr.mgid.raw,
+			     sizeof(*gid));
+		if (ret < 0) {
 			n = n->rb_left;
-		else if (ret > 0)
+		} else if (ret > 0) {
 			n = n->rb_right;
-		else
+		} else {
+			/* MGID/MLID must match */
+			if (mcast->mcast_addr.lid != lid) {
+				spin_unlock_irq(&ibp->lock);
+				return -EINVAL;
+			}
 			break;
+		}
 	}
 
 	/* Search the QP list. */
diff --git a/include/rdma/rdma_vt.h b/include/rdma/rdma_vt.h
index 8fc1ca7..7f89568 100644
--- a/include/rdma/rdma_vt.h
+++ b/include/rdma/rdma_vt.h
@@ -516,6 +516,7 @@ int rvt_rkey_ok(struct rvt_qp *qp, struct rvt_sge *sge,
 		u32 len, u64 vaddr, u32 rkey, int acc);
 int rvt_lkey_ok(struct rvt_lkey_table *rkt, struct rvt_pd *pd,
 		struct rvt_sge *isge, struct ib_sge *sge, int acc);
-struct rvt_mcast *rvt_mcast_find(struct rvt_ibport *ibp, union ib_gid *mgid);
+struct rvt_mcast *rvt_mcast_find(struct rvt_ibport *ibp, union ib_gid *mgid,
+				 u16 lid);
 
 #endif          /* DEF_RDMA_VT_H */
diff --git a/include/rdma/rdmavt_qp.h b/include/rdma/rdmavt_qp.h
index e3bb312..75a077c 100644
--- a/include/rdma/rdmavt_qp.h
+++ b/include/rdma/rdmavt_qp.h
@@ -435,9 +435,14 @@ struct rvt_mcast_qp {
 	struct rvt_qp *qp;
 };
 
+struct rvt_mcast_addr {
+	union ib_gid mgid;
+	u16 lid;
+};
+
 struct rvt_mcast {
 	struct rb_node rb_node;
-	union ib_gid mgid;
+	struct rvt_mcast_addr mcast_addr;
 	struct list_head qp_list;
 	wait_queue_head_t wait;
 	atomic_t refcount;

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[PATCH v2 05/19] IB/hfi1: Validate the TID count before using it

[Dennis Dalessandro]

From: Michael J. Ruhl <michael.j.ruhl-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>

Improve the safety of the code by validating the user supplied
tidcnt before use.

Reviewed-by: Mitko Haralanov <mitko.haralanov-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Reviewed-by: Dennis Dalessandro <dennis.dalessandro-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Michael J. Ruhl <michael.j.ruhl-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
---
 drivers/infiniband/hw/hfi1/user_exp_rcv.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/drivers/infiniband/hw/hfi1/user_exp_rcv.c b/drivers/infiniband/hw/hfi1/user_exp_rcv.c
index 4a82953..9b8bdf7 100644
--- a/drivers/infiniband/hw/hfi1/user_exp_rcv.c
+++ b/drivers/infiniband/hw/hfi1/user_exp_rcv.c
@@ -578,6 +578,9 @@ int hfi1_user_exp_rcv_clear(struct file *fp, struct hfi1_tid_info *tinfo)
 	u32 *tidinfo;
 	unsigned tididx;
 
+	if (unlikely(tinfo->tidcnt > fd->tid_used))
+		return -EINVAL;
+
 	tidinfo = memdup_user((void __user *)(unsigned long)tinfo->tidlist,
 			      sizeof(tidinfo[0]) * tinfo->tidcnt);
 	if (IS_ERR(tidinfo))

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[PATCH v2 06/19] IB/hfi1: Return SC2VL mappings to FM with VL15 instead of ILLEGAL_VL

[Dennis Dalessandro]

From: Sebastian Sanchez <sebastian.sanchez-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>

VL15 in the SC2VL table is used to indicate an invalid SC
for the FM, however, internally the driver remaps SCs from
VL15 to ILLEGAL_VL to prevent error counts. This mapping
confuses the FM when performing a sweep, making it return
a table mismatch error. Have SMA convert ILLEGAL_VL
to VL15 entries for the SC2VL table queries.

Reviewed-by: Michael J. Ruhl <michael.j.ruhl-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Sebastian Sanchez <sebastian.sanchez-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
---
 drivers/infiniband/hw/hfi1/mad.c |   41 +++++++++++++++++++++++---------------
 1 files changed, 25 insertions(+), 16 deletions(-)

diff --git a/drivers/infiniband/hw/hfi1/mad.c b/drivers/infiniband/hw/hfi1/mad.c
index de34131..db5494d 100644
--- a/drivers/infiniband/hw/hfi1/mad.c
+++ b/drivers/infiniband/hw/hfi1/mad.c
@@ -1,5 +1,5 @@
 /*
- * Copyright(c) 2015, 2016 Intel Corporation.
+ * Copyright(c) 2015-2017 Intel Corporation.
  *
  * This file is provided under a dual BSD/GPLv2 license.  When using or
  * redistributing this file, you may do so under either license.
@@ -1470,25 +1470,15 @@ static int __subn_set_opa_pkeytable(struct opa_smp *smp, u32 am, u8 *data,
 	return __subn_get_opa_pkeytable(smp, am, data, ibdev, port, resp_len);
 }
 
-static int get_sc2vlt_tables(struct hfi1_devdata *dd, void *data)
-{
-	u64 *val = data;
-
-	*val++ = read_csr(dd, SEND_SC2VLT0);
-	*val++ = read_csr(dd, SEND_SC2VLT1);
-	*val++ = read_csr(dd, SEND_SC2VLT2);
-	*val++ = read_csr(dd, SEND_SC2VLT3);
-	return 0;
-}
-
 #define ILLEGAL_VL 12
 /*
  * filter_sc2vlt changes mappings to VL15 to ILLEGAL_VL (except
  * for SC15, which must map to VL15). If we don't remap things this
  * way it is possible for VL15 counters to increment when we try to
  * send on a SC which is mapped to an invalid VL.
+ * When getting the table convert ILLEGAL_VL back to VL15.
  */
-static void filter_sc2vlt(void *data)
+static void filter_sc2vlt(void *data, bool set)
 {
 	int i;
 	u8 *pd = data;
@@ -1496,8 +1486,14 @@ static void filter_sc2vlt(void *data)
 	for (i = 0; i < OPA_MAX_SCS; i++) {
 		if (i == 15)
 			continue;
-		if ((pd[i] & 0x1f) == 0xf)
-			pd[i] = ILLEGAL_VL;
+
+		if (set) {
+			if ((pd[i] & 0x1f) == 0xf)
+				pd[i] = ILLEGAL_VL;
+		} else {
+			if ((pd[i] & 0x1f) == ILLEGAL_VL)
+				pd[i] = 0xf;
+		}
 	}
 }
 
@@ -1505,7 +1501,7 @@ static int set_sc2vlt_tables(struct hfi1_devdata *dd, void *data)
 {
 	u64 *val = data;
 
-	filter_sc2vlt(data);
+	filter_sc2vlt(data, true);
 
 	write_csr(dd, SEND_SC2VLT0, *val++);
 	write_csr(dd, SEND_SC2VLT1, *val++);
@@ -1517,6 +1513,19 @@ static int set_sc2vlt_tables(struct hfi1_devdata *dd, void *data)
 	return 0;
 }
 
+static int get_sc2vlt_tables(struct hfi1_devdata *dd, void *data)
+{
+	u64 *val = (u64 *)data;
+
+	*val++ = read_csr(dd, SEND_SC2VLT0);
+	*val++ = read_csr(dd, SEND_SC2VLT1);
+	*val++ = read_csr(dd, SEND_SC2VLT2);
+	*val++ = read_csr(dd, SEND_SC2VLT3);
+
+	filter_sc2vlt((u64 *)data, false);
+	return 0;
+}
+
 static int __subn_get_opa_sl_to_sc(struct opa_smp *smp, u32 am, u8 *data,
 				   struct ib_device *ibdev, u8 port,
 				   u32 *resp_len)

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[PATCH v2 07/19] IB/hfi1: Rename hdr2sc to hfi1_9B_get_sc5

[Dennis Dalessandro]

From: Dasaratharaman Chandramouli <dasaratharaman.chandramouli-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>

The function really returned the 5-bit sc value from
the header and rhf. hdr2sc didn't quite describe what it did.

Reviewed-by: Dennis Dalessandro <dennis.dalessandro-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Reviewed-by: Don Hiatt <don.hiatt-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Dasaratharaman Chandramouli <dasaratharaman.chandramouli-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
---
 drivers/infiniband/hw/hfi1/driver.c |    7 ++++---
 drivers/infiniband/hw/hfi1/hfi.h    |    2 +-
 drivers/infiniband/hw/hfi1/ud.c     |    2 +-
 drivers/infiniband/hw/hfi1/verbs.c  |    2 +-
 4 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/drivers/infiniband/hw/hfi1/driver.c b/drivers/infiniband/hw/hfi1/driver.c
index 64bdbce..d731b5e 100644
--- a/drivers/infiniband/hw/hfi1/driver.c
+++ b/drivers/infiniband/hw/hfi1/driver.c
@@ -397,7 +397,7 @@ static void rcv_hdrerr(struct hfi1_ctxtdata *rcd, struct hfi1_pportdata *ppd,
 			u16 rlid;
 			u8 svc_type, sl, sc5;
 
-			sc5 = hdr2sc(rhdr, packet->rhf);
+			sc5 = hfi1_9B_get_sc5(rhdr, packet->rhf);
 			sl = ibp->sc_to_sl[sc5];
 
 			lqpn = be32_to_cpu(bth[1]) & RVT_QPN_MASK;
@@ -492,7 +492,7 @@ void hfi1_process_ecn_slowpath(struct rvt_qp *qp, struct hfi1_packet *pkt,
 		return;
 	}
 
-	sc = hdr2sc(hdr, pkt->rhf);
+	sc = hfi1_9B_get_sc5(hdr, pkt->rhf);
 
 	bth1 = be32_to_cpu(ohdr->bth[1]);
 	if (do_cnp && (bth1 & HFI1_FECN_SMASK)) {
@@ -909,7 +909,8 @@ static inline int set_armed_to_active(struct hfi1_ctxtdata *rcd,
 						   packet->rhf_addr);
 	u8 etype = rhf_rcv_type(packet->rhf);
 
-	if (etype == RHF_RCV_TYPE_IB && hdr2sc(hdr, packet->rhf) != 0xf) {
+	if (etype == RHF_RCV_TYPE_IB &&
+	    hfi1_9B_get_sc5(hdr, packet->rhf) != 0xf) {
 		int hwstate = read_logical_state(dd);
 
 		if (hwstate != LSTATE_ACTIVE) {
diff --git a/drivers/infiniband/hw/hfi1/hfi.h b/drivers/infiniband/hw/hfi1/hfi.h
index a31638c..8509502 100644
--- a/drivers/infiniband/hw/hfi1/hfi.h
+++ b/drivers/infiniband/hw/hfi1/hfi.h
@@ -1261,7 +1261,7 @@ static inline u32 driver_lstate(struct hfi1_pportdata *ppd)
 void receive_interrupt_work(struct work_struct *work);
 
 /* extract service channel from header and rhf */
-static inline int hdr2sc(struct ib_header *hdr, u64 rhf)
+static inline int hfi1_9B_get_sc5(struct ib_header *hdr, u64 rhf)
 {
 	return ((be16_to_cpu(hdr->lrh[0]) >> 12) & 0xf) |
 	       ((!!(rhf_dc_info(rhf))) << 4);
diff --git a/drivers/infiniband/hw/hfi1/ud.c b/drivers/infiniband/hw/hfi1/ud.c
index 13ea4eb..fd105cf 100644
--- a/drivers/infiniband/hw/hfi1/ud.c
+++ b/drivers/infiniband/hw/hfi1/ud.c
@@ -680,7 +680,7 @@ void hfi1_ud_rcv(struct hfi1_packet *packet)
 	u32 tlen = packet->tlen;
 	struct rvt_qp *qp = packet->qp;
 	bool has_grh = rcv_flags & HFI1_HAS_GRH;
-	u8 sc5 = hdr2sc(hdr, packet->rhf);
+	u8 sc5 = hfi1_9B_get_sc5(hdr, packet->rhf);
 	u32 bth1;
 	u8 sl_from_sc, sl;
 	u16 slid;
diff --git a/drivers/infiniband/hw/hfi1/verbs.c b/drivers/infiniband/hw/hfi1/verbs.c
index f74abb1..66a2378 100644
--- a/drivers/infiniband/hw/hfi1/verbs.c
+++ b/drivers/infiniband/hw/hfi1/verbs.c
@@ -1928,7 +1928,7 @@ void hfi1_cnp_rcv(struct hfi1_packet *packet)
 		return;
 	}
 
-	sc5 = hdr2sc(hdr, packet->rhf);
+	sc5 = hfi1_9B_get_sc5(hdr, packet->rhf);
 	sl = ibp->sc_to_sl[sc5];
 	lqpn = qp->ibqp.qp_num;
 

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[PATCH v2 08/19] IB/hfi1: Add functions to parse 9B headers

[Dennis Dalessandro]

From: Don Hiatt <don.hiatt-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>

These inline functions improve code readability by
enabling callers to read specific fields from the
header without knowledge of byte offsets.

Reviewed-by: Dennis Dalessandro <dennis.dalessandro-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Don Hiatt <don.hiatt-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Dasaratharaman Chandramouli <dasaratharaman.chandramouli-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
---
 drivers/infiniband/hw/hfi1/driver.c |   13 ++++----
 drivers/infiniband/hw/hfi1/hfi.h    |    3 +-
 drivers/infiniband/hw/hfi1/rc.c     |   14 ++++----
 drivers/infiniband/hw/hfi1/ruc.c    |   24 +++++++-------
 drivers/infiniband/hw/hfi1/trace.c  |    5 +--
 drivers/infiniband/hw/hfi1/uc.c     |    8 ++---
 drivers/infiniband/hw/hfi1/ud.c     |   14 ++++----
 drivers/infiniband/hw/hfi1/verbs.c  |    8 ++---
 include/rdma/ib_hdrs.h              |   60 +++++++++++++++++++++++++++++++++++
 9 files changed, 102 insertions(+), 47 deletions(-)

diff --git a/drivers/infiniband/hw/hfi1/driver.c b/drivers/infiniband/hw/hfi1/driver.c
index d731b5e..7e6d86b 100644
--- a/drivers/infiniband/hw/hfi1/driver.c
+++ b/drivers/infiniband/hw/hfi1/driver.c
@@ -284,7 +284,7 @@ static void rcv_hdrerr(struct hfi1_ctxtdata *rcd, struct hfi1_pportdata *ppd,
 {
 	struct ib_header *rhdr = packet->hdr;
 	u32 rte = rhf_rcv_type_err(packet->rhf);
-	int lnh = be16_to_cpu(rhdr->lrh[0]) & 3;
+	int lnh = ib_get_lnh(rhdr);
 	struct hfi1_ibport *ibp = rcd_to_iport(rcd);
 	struct hfi1_devdata *dd = ppd->dd;
 	struct rvt_dev_info *rdi = &dd->verbs_dev.rdi;
@@ -296,7 +296,7 @@ static void rcv_hdrerr(struct hfi1_ctxtdata *rcd, struct hfi1_pportdata *ppd,
 		/* For TIDERR and RC QPs preemptively schedule a NAK */
 		struct ib_other_headers *ohdr = NULL;
 		u32 tlen = rhf_pkt_len(packet->rhf); /* in bytes */
-		u16 lid  = be16_to_cpu(rhdr->lrh[1]);
+		u16 lid  = ib_get_dlid(rhdr);
 		u32 qp_num;
 		u32 rcv_flags = 0;
 
@@ -415,7 +415,7 @@ static void rcv_hdrerr(struct hfi1_ctxtdata *rcd, struct hfi1_pportdata *ppd,
 				svc_type = IB_CC_SVCTYPE_UD;
 				break;
 			case IB_QPT_UC:
-				rlid = be16_to_cpu(rhdr->lrh[3]);
+				rlid = ib_get_slid(rhdr);
 				rqpn = qp->remote_qpn;
 				svc_type = IB_CC_SVCTYPE_UC;
 				break;
@@ -461,7 +461,7 @@ void hfi1_process_ecn_slowpath(struct rvt_qp *qp, struct hfi1_packet *pkt,
 	struct ib_other_headers *ohdr = pkt->ohdr;
 	struct ib_grh *grh = NULL;
 	u32 rqpn = 0, bth1;
-	u16 rlid, dlid = be16_to_cpu(hdr->lrh[1]);
+	u16 rlid, dlid = ib_get_dlid(hdr);
 	u8 sc, svc_type;
 	bool is_mcast = false;
 
@@ -472,7 +472,7 @@ void hfi1_process_ecn_slowpath(struct rvt_qp *qp, struct hfi1_packet *pkt,
 	case IB_QPT_SMI:
 	case IB_QPT_GSI:
 	case IB_QPT_UD:
-		rlid = be16_to_cpu(hdr->lrh[3]);
+		rlid = ib_get_slid(hdr);
 		rqpn = be32_to_cpu(ohdr->u.ud.deth[1]) & RVT_QPN_MASK;
 		svc_type = IB_CC_SVCTYPE_UD;
 		is_mcast = (dlid > be16_to_cpu(IB_MULTICAST_LID_BASE)) &&
@@ -622,8 +622,7 @@ static void __prescan_rxq(struct hfi1_packet *packet)
 
 		packet->hdr = hfi1_get_msgheader(dd, rhf_addr);
 		hdr = packet->hdr;
-
-		lnh = be16_to_cpu(hdr->lrh[0]) & 3;
+		lnh = ib_get_lnh(hdr);
 
 		if (lnh == HFI1_LRH_BTH) {
 			packet->ohdr = &hdr->u.oth;
diff --git a/drivers/infiniband/hw/hfi1/hfi.h b/drivers/infiniband/hw/hfi1/hfi.h
index 8509502..1d9436c 100644
--- a/drivers/infiniband/hw/hfi1/hfi.h
+++ b/drivers/infiniband/hw/hfi1/hfi.h
@@ -1263,8 +1263,7 @@ static inline u32 driver_lstate(struct hfi1_pportdata *ppd)
 /* extract service channel from header and rhf */
 static inline int hfi1_9B_get_sc5(struct ib_header *hdr, u64 rhf)
 {
-	return ((be16_to_cpu(hdr->lrh[0]) >> 12) & 0xf) |
-	       ((!!(rhf_dc_info(rhf))) << 4);
+	return ib_get_sc(hdr) | ((!!(rhf_dc_info(rhf))) << 4);
 }
 
 #define HFI1_JKEY_WIDTH       16
diff --git a/drivers/infiniband/hw/hfi1/rc.c b/drivers/infiniband/hw/hfi1/rc.c
index 0e56578..623209a 100644
--- a/drivers/infiniband/hw/hfi1/rc.c
+++ b/drivers/infiniband/hw/hfi1/rc.c
@@ -994,12 +994,12 @@ void hfi1_rc_send_complete(struct rvt_qp *qp, struct ib_header *hdr)
 		return;
 
 	/* Find out where the BTH is */
-	if ((be16_to_cpu(hdr->lrh[0]) & 3) == HFI1_LRH_BTH)
+	if (ib_get_lnh(hdr) == HFI1_LRH_BTH)
 		ohdr = &hdr->u.oth;
 	else
 		ohdr = &hdr->u.l.oth;
 
-	opcode = be32_to_cpu(ohdr->bth[0]) >> 24;
+	opcode = ib_bth_get_opcode(ohdr);
 	if (opcode >= OP(RDMA_READ_RESPONSE_FIRST) &&
 	    opcode <= OP(ATOMIC_ACKNOWLEDGE)) {
 		WARN_ON(!qp->s_rdma_ack_cnt);
@@ -1524,7 +1524,7 @@ static void rc_rcv_resp(struct hfi1_ibport *ibp,
 		if (!do_rc_ack(qp, aeth, psn, opcode, 0, rcd))
 			goto ack_done;
 		/* Get the number of bytes the message was padded by. */
-		pad = (be32_to_cpu(ohdr->bth[0]) >> 20) & 3;
+		pad = ib_bth_get_pad(ohdr);
 		/*
 		 * Check that the data size is >= 0 && <= pmtu.
 		 * Remember to account for ICRC (4).
@@ -1548,7 +1548,7 @@ static void rc_rcv_resp(struct hfi1_ibport *ibp,
 		if (unlikely(wqe->wr.opcode != IB_WR_RDMA_READ))
 			goto ack_op_err;
 		/* Get the number of bytes the message was padded by. */
-		pad = (be32_to_cpu(ohdr->bth[0]) >> 20) & 3;
+		pad = ib_bth_get_pad(ohdr);
 		/*
 		 * Check that the data size is >= 1 && <= pmtu.
 		 * Remember to account for ICRC (4).
@@ -1942,7 +1942,7 @@ void hfi1_rc_rcv(struct hfi1_packet *packet)
 	is_fecn = process_ecn(qp, packet, false);
 
 	psn = be32_to_cpu(ohdr->bth[2]);
-	opcode = (bth0 >> 24) & 0xff;
+	opcode = ib_bth_get_opcode(ohdr);
 
 	/*
 	 * Process responses (ACKs) before anything else.  Note that the
@@ -2073,7 +2073,7 @@ void hfi1_rc_rcv(struct hfi1_packet *packet)
 		wc.ex.imm_data = 0;
 send_last:
 		/* Get the number of bytes the message was padded by. */
-		pad = (bth0 >> 20) & 3;
+		pad = ib_bth_get_pad(ohdr);
 		/* Check for invalid length. */
 		/* LAST len should be >= 1 */
 		if (unlikely(tlen < (hdrsize + pad + 4)))
@@ -2386,7 +2386,7 @@ void hfi1_rc_hdrerr(
 		return;
 
 	psn = be32_to_cpu(ohdr->bth[2]);
-	opcode = (bth0 >> 24) & 0xff;
+	opcode = ib_bth_get_opcode(ohdr);
 
 	/* Only deal with RDMA Writes for now */
 	if (opcode < IB_OPCODE_RC_RDMA_READ_RESPONSE_FIRST) {
diff --git a/drivers/infiniband/hw/hfi1/ruc.c b/drivers/infiniband/hw/hfi1/ruc.c
index eeb650d..2730915 100644
--- a/drivers/infiniband/hw/hfi1/ruc.c
+++ b/drivers/infiniband/hw/hfi1/ruc.c
@@ -238,18 +238,18 @@ int hfi1_ruc_check_hdr(struct hfi1_ibport *ibp, struct ib_header *hdr,
 				qp->alt_ah_attr.grh.dgid.global.interface_id))
 				goto err;
 		}
-		if (unlikely(rcv_pkey_check(ppd_from_ibp(ibp), (u16)bth0,
-					    sc5, be16_to_cpu(hdr->lrh[3])))) {
+		if (unlikely(rcv_pkey_check(ppd_from_ibp(ibp), (u16)bth0, sc5,
+					    ib_get_slid(hdr)))) {
 			hfi1_bad_pqkey(ibp, OPA_TRAP_BAD_P_KEY,
 				       (u16)bth0,
-				       (be16_to_cpu(hdr->lrh[0]) >> 4) & 0xF,
+				       ib_get_sl(hdr),
 				       0, qp->ibqp.qp_num,
-				       be16_to_cpu(hdr->lrh[3]),
-				       be16_to_cpu(hdr->lrh[1]));
+				       ib_get_slid(hdr),
+				       ib_get_dlid(hdr));
 			goto err;
 		}
 		/* Validate the SLID. See Ch. 9.6.1.5 and 17.2.8 */
-		if (be16_to_cpu(hdr->lrh[3]) != qp->alt_ah_attr.dlid ||
+		if (ib_get_slid(hdr) != qp->alt_ah_attr.dlid ||
 		    ppd_from_ibp(ibp)->port != qp->alt_ah_attr.port_num)
 			goto err;
 		spin_lock_irqsave(&qp->s_lock, flags);
@@ -273,18 +273,18 @@ int hfi1_ruc_check_hdr(struct hfi1_ibport *ibp, struct ib_header *hdr,
 			     qp->remote_ah_attr.grh.dgid.global.interface_id))
 				goto err;
 		}
-		if (unlikely(rcv_pkey_check(ppd_from_ibp(ibp), (u16)bth0,
-					    sc5, be16_to_cpu(hdr->lrh[3])))) {
+		if (unlikely(rcv_pkey_check(ppd_from_ibp(ibp), (u16)bth0, sc5,
+					    ib_get_slid(hdr)))) {
 			hfi1_bad_pqkey(ibp, OPA_TRAP_BAD_P_KEY,
 				       (u16)bth0,
-				       (be16_to_cpu(hdr->lrh[0]) >> 4) & 0xF,
+				       ib_get_sl(hdr),
 				       0, qp->ibqp.qp_num,
-				       be16_to_cpu(hdr->lrh[3]),
-				       be16_to_cpu(hdr->lrh[1]));
+				       ib_get_slid(hdr),
+				       ib_get_dlid(hdr));
 			goto err;
 		}
 		/* Validate the SLID. See Ch. 9.6.1.5 */
-		if (be16_to_cpu(hdr->lrh[3]) != qp->remote_ah_attr.dlid ||
+		if (ib_get_slid(hdr) != qp->remote_ah_attr.dlid ||
 		    ppd_from_ibp(ibp)->port != qp->port_num)
 			goto err;
 		if (qp->s_mig_state == IB_MIG_REARM &&
diff --git a/drivers/infiniband/hw/hfi1/trace.c b/drivers/infiniband/hw/hfi1/trace.c
index e86798a..eafae48 100644
--- a/drivers/infiniband/hw/hfi1/trace.c
+++ b/drivers/infiniband/hw/hfi1/trace.c
@@ -51,13 +51,12 @@ u8 ibhdr_exhdr_len(struct ib_header *hdr)
 {
 	struct ib_other_headers *ohdr;
 	u8 opcode;
-	u8 lnh = (u8)(be16_to_cpu(hdr->lrh[0]) & 3);
 
-	if (lnh == HFI1_LRH_BTH)
+	if (ib_get_lnh(hdr) == HFI1_LRH_BTH)
 		ohdr = &hdr->u.oth;
 	else
 		ohdr = &hdr->u.l.oth;
-	opcode = be32_to_cpu(ohdr->bth[0]) >> 24;
+	opcode = ib_bth_get_opcode(ohdr);
 	return hdr_len_by_opcode[opcode] == 0 ?
 	       0 : hdr_len_by_opcode[opcode] - (12 + 8);
 }
diff --git a/drivers/infiniband/hw/hfi1/uc.c b/drivers/infiniband/hw/hfi1/uc.c
index 4b2a840..f0bdb10 100644
--- a/drivers/infiniband/hw/hfi1/uc.c
+++ b/drivers/infiniband/hw/hfi1/uc.c
@@ -320,7 +320,7 @@ void hfi1_uc_rcv(struct hfi1_packet *packet)
 	process_ecn(qp, packet, true);
 
 	psn = be32_to_cpu(ohdr->bth[2]);
-	opcode = (bth0 >> 24) & 0xff;
+	opcode = ib_bth_get_opcode(ohdr);
 
 	/* Compare the PSN verses the expected PSN. */
 	if (unlikely(cmp_psn(psn, qp->r_psn) != 0)) {
@@ -433,7 +433,7 @@ void hfi1_uc_rcv(struct hfi1_packet *packet)
 		wc.wc_flags = 0;
 send_last:
 		/* Get the number of bytes the message was padded by. */
-		pad = (be32_to_cpu(ohdr->bth[0]) >> 20) & 3;
+		pad = ib_bth_get_pad(ohdr);
 		/* Check for invalid length. */
 		/* LAST len should be >= 1 */
 		if (unlikely(tlen < (hdrsize + pad + 4)))
@@ -528,7 +528,7 @@ void hfi1_uc_rcv(struct hfi1_packet *packet)
 		wc.wc_flags = IB_WC_WITH_IMM;
 
 		/* Get the number of bytes the message was padded by. */
-		pad = (be32_to_cpu(ohdr->bth[0]) >> 20) & 3;
+		pad = ib_bth_get_pad(ohdr);
 		/* Check for invalid length. */
 		/* LAST len should be >= 1 */
 		if (unlikely(tlen < (hdrsize + pad + 4)))
@@ -555,7 +555,7 @@ void hfi1_uc_rcv(struct hfi1_packet *packet)
 	case OP(RDMA_WRITE_LAST):
 rdma_last:
 		/* Get the number of bytes the message was padded by. */
-		pad = (be32_to_cpu(ohdr->bth[0]) >> 20) & 3;
+		pad = ib_bth_get_pad(ohdr);
 		/* Check for invalid length. */
 		/* LAST len should be >= 1 */
 		if (unlikely(tlen < (hdrsize + pad + 4)))
diff --git a/drivers/infiniband/hw/hfi1/ud.c b/drivers/infiniband/hw/hfi1/ud.c
index fd105cf..8b3403a 100644
--- a/drivers/infiniband/hw/hfi1/ud.c
+++ b/drivers/infiniband/hw/hfi1/ud.c
@@ -688,18 +688,16 @@ void hfi1_ud_rcv(struct hfi1_packet *packet)
 
 	qkey = be32_to_cpu(ohdr->u.ud.deth[0]);
 	src_qp = be32_to_cpu(ohdr->u.ud.deth[1]) & RVT_QPN_MASK;
-	dlid = be16_to_cpu(hdr->lrh[1]);
+	dlid = ib_get_dlid(hdr);
 	bth1 = be32_to_cpu(ohdr->bth[1]);
-	slid = be16_to_cpu(hdr->lrh[3]);
-	pkey = (u16)be32_to_cpu(ohdr->bth[0]);
-	sl = (be16_to_cpu(hdr->lrh[0]) >> 4) & 0xf;
-	extra_bytes = (be32_to_cpu(ohdr->bth[0]) >> 20) & 3;
+	slid = ib_get_slid(hdr);
+	pkey = ib_bth_get_pkey(ohdr);
+	opcode = ib_bth_get_opcode(ohdr);
+	sl = ib_get_sl(hdr);
+	extra_bytes = ib_bth_get_pad(ohdr);
 	extra_bytes += (SIZE_OF_CRC << 2);
 	sl_from_sc = ibp->sc_to_sl[sc5];
 
-	opcode = be32_to_cpu(ohdr->bth[0]) >> 24;
-	opcode &= 0xff;
-
 	process_ecn(qp, packet, (opcode != IB_OPCODE_CNP));
 	/*
 	 * Get the number of bytes the message was padded by
diff --git a/drivers/infiniband/hw/hfi1/verbs.c b/drivers/infiniband/hw/hfi1/verbs.c
index 66a2378..7f49719 100644
--- a/drivers/infiniband/hw/hfi1/verbs.c
+++ b/drivers/infiniband/hw/hfi1/verbs.c
@@ -571,7 +571,7 @@ void hfi1_ib_rcv(struct hfi1_packet *packet)
 	u16 lid;
 
 	/* Check for GRH */
-	lnh = be16_to_cpu(hdr->lrh[0]) & 3;
+	lnh = ib_get_lnh(hdr);
 	if (lnh == HFI1_LRH_BTH) {
 		packet->ohdr = &hdr->u.oth;
 	} else if (lnh == HFI1_LRH_GRH) {
@@ -590,12 +590,12 @@ void hfi1_ib_rcv(struct hfi1_packet *packet)
 
 	trace_input_ibhdr(rcd->dd, hdr);
 
-	opcode = (be32_to_cpu(packet->ohdr->bth[0]) >> 24);
+	opcode = ib_bth_get_opcode(packet->ohdr);
 	inc_opstats(tlen, &rcd->opstats->stats[opcode]);
 
 	/* Get the destination QP number. */
 	qp_num = be32_to_cpu(packet->ohdr->bth[1]) & RVT_QPN_MASK;
-	lid = be16_to_cpu(hdr->lrh[1]);
+	lid = ib_get_dlid(hdr);
 	if (unlikely((lid >= be16_to_cpu(IB_MULTICAST_LID_BASE)) &&
 		     (lid != be16_to_cpu(IB_LID_PERMISSIVE)))) {
 		struct rvt_mcast *mcast;
@@ -1230,7 +1230,7 @@ int hfi1_verbs_send(struct rvt_qp *qp, struct hfi1_pkt_state *ps)
 
 	hdr = &ps->s_txreq->phdr.hdr;
 	/* locate the pkey within the headers */
-	lnh = be16_to_cpu(hdr->lrh[0]) & 3;
+	lnh = ib_get_lnh(hdr);
 	if (lnh == HFI1_LRH_GRH)
 		ohdr = &hdr->u.l.oth;
 	else
diff --git a/include/rdma/ib_hdrs.h b/include/rdma/ib_hdrs.h
index c755325..9cf42bc 100644
--- a/include/rdma/ib_hdrs.h
+++ b/include/rdma/ib_hdrs.h
@@ -181,4 +181,64 @@ static inline void put_ib_ateth_compare(u64 val, struct ib_atomic_eth *ateth)
 	ib_u64_put(val, &ateth->compare_data);
 }
 
+/*
+ * 9B/IB Packet Format
+ */
+#define IB_LNH_MASK		3
+#define IB_SC_MASK		0xf
+#define IB_SC_SHIFT		12
+#define IB_SL_MASK		0xf
+#define IB_SL_SHIFT		4
+
+static inline u8 ib_get_lnh(struct ib_header *hdr)
+{
+	return (be16_to_cpu(hdr->lrh[0]) & IB_LNH_MASK);
+}
+
+static inline u8 ib_get_sc(struct ib_header *hdr)
+{
+	return ((be16_to_cpu(hdr->lrh[0]) >> IB_SC_SHIFT) & IB_SC_MASK);
+}
+
+static inline u8 ib_get_sl(struct ib_header *hdr)
+{
+	return ((be16_to_cpu(hdr->lrh[0]) >> IB_SL_SHIFT) & IB_SL_MASK);
+}
+
+static inline u16 ib_get_dlid(struct ib_header *hdr)
+{
+	return (be16_to_cpu(hdr->lrh[1]));
+}
+
+static inline u16 ib_get_slid(struct ib_header *hdr)
+{
+	return (be16_to_cpu(hdr->lrh[3]));
+}
+
+/*
+ * BTH
+ */
+#define IB_BTH_OPCODE_MASK	0xff
+#define IB_BTH_OPCODE_SHIFT	24
+#define IB_BTH_PAD_MASK	3
+#define IB_BTH_PKEY_MASK	0xffff
+#define IB_BTH_PAD_SHIFT	20
+
+static inline u8 ib_bth_get_pad(struct ib_other_headers *ohdr)
+{
+	return ((be32_to_cpu(ohdr->bth[0]) >> IB_BTH_PAD_SHIFT) &
+		   IB_BTH_PAD_MASK);
+}
+
+static inline u16 ib_bth_get_pkey(struct ib_other_headers *ohdr)
+{
+	return (be32_to_cpu(ohdr->bth[0]) & IB_BTH_PKEY_MASK);
+}
+
+static inline u8 ib_bth_get_opcode(struct ib_other_headers *ohdr)
+{
+	return ((be32_to_cpu(ohdr->bth[0]) >> IB_BTH_OPCODE_SHIFT) &
+		   IB_BTH_OPCODE_MASK);
+}
+
 #endif                          /* IB_HDRS_H */

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[PATCH v2 09/19] IB/hfi1: Use defines from common headers

[Dennis Dalessandro]

From: Don Hiatt <don.hiatt-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>

Move FECN and BECN related defines to common header files

Reviewed-by: Dennis Dalessandro <dennis.dalessandro-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Don Hiatt <don.hiatt-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Dasaratharaman Chandramouli <dasaratharaman.chandramouli-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
---
 drivers/infiniband/hw/hfi1/common.h       |    6 ------
 drivers/infiniband/hw/hfi1/driver.c       |    8 ++++----
 drivers/infiniband/hw/hfi1/hfi.h          |    4 ++--
 drivers/infiniband/hw/hfi1/rc.c           |    2 +-
 drivers/infiniband/hw/hfi1/ruc.c          |    2 +-
 drivers/infiniband/hw/hfi1/trace_ibhdrs.h |    8 ++++----
 drivers/infiniband/hw/hfi1/ud.c           |    2 +-
 include/rdma/ib_hdrs.h                    |    6 ++++++
 8 files changed, 19 insertions(+), 19 deletions(-)

diff --git a/drivers/infiniband/hw/hfi1/common.h b/drivers/infiniband/hw/hfi1/common.h
index 804150f..995d62c 100644
--- a/drivers/infiniband/hw/hfi1/common.h
+++ b/drivers/infiniband/hw/hfi1/common.h
@@ -331,12 +331,6 @@ struct diag_pkt {
 #define FULL_MGMT_P_KEY      0xFFFF
 
 #define DEFAULT_P_KEY LIM_MGMT_P_KEY
-#define HFI1_FECN_SHIFT 31
-#define HFI1_FECN_MASK 1
-#define HFI1_FECN_SMASK BIT(HFI1_FECN_SHIFT)
-#define HFI1_BECN_SHIFT 30
-#define HFI1_BECN_MASK 1
-#define HFI1_BECN_SMASK BIT(HFI1_BECN_SHIFT)
 
 /**
  * 0xF8 - 4 bits of multicast range and 1 bit for collective range
diff --git a/drivers/infiniband/hw/hfi1/driver.c b/drivers/infiniband/hw/hfi1/driver.c
index 7e6d86b..fc5753c 100644
--- a/drivers/infiniband/hw/hfi1/driver.c
+++ b/drivers/infiniband/hw/hfi1/driver.c
@@ -495,13 +495,13 @@ void hfi1_process_ecn_slowpath(struct rvt_qp *qp, struct hfi1_packet *pkt,
 	sc = hfi1_9B_get_sc5(hdr, pkt->rhf);
 
 	bth1 = be32_to_cpu(ohdr->bth[1]);
-	if (do_cnp && (bth1 & HFI1_FECN_SMASK)) {
+	if (do_cnp && (bth1 & IB_FECN_SMASK)) {
 		u16 pkey = (u16)be32_to_cpu(ohdr->bth[0]);
 
 		return_cnp(ibp, qp, rqpn, pkey, dlid, rlid, sc, grh);
 	}
 
-	if (!is_mcast && (bth1 & HFI1_BECN_SMASK)) {
+	if (!is_mcast && (bth1 & IB_BECN_SMASK)) {
 		struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
 		u32 lqpn = bth1 & RVT_QPN_MASK;
 		u8 sl = ibp->sc_to_sl[sc];
@@ -634,7 +634,7 @@ static void __prescan_rxq(struct hfi1_packet *packet)
 		}
 
 		bth1 = be32_to_cpu(packet->ohdr->bth[1]);
-		is_ecn = !!(bth1 & (HFI1_FECN_SMASK | HFI1_BECN_SMASK));
+		is_ecn = !!(bth1 & (IB_FECN_SMASK | IB_BECN_SMASK));
 
 		if (!is_ecn)
 			goto next;
@@ -652,7 +652,7 @@ static void __prescan_rxq(struct hfi1_packet *packet)
 		rcu_read_unlock();
 
 		/* turn off BECN, FECN */
-		bth1 &= ~(HFI1_FECN_SMASK | HFI1_BECN_SMASK);
+		bth1 &= ~(IB_FECN_SMASK | IB_BECN_SMASK);
 		packet->ohdr->bth[1] = cpu_to_be32(bth1);
 next:
 		update_ps_mdata(&mdata, rcd);
diff --git a/drivers/infiniband/hw/hfi1/hfi.h b/drivers/infiniband/hw/hfi1/hfi.h
index 1d9436c..79c4289 100644
--- a/drivers/infiniband/hw/hfi1/hfi.h
+++ b/drivers/infiniband/hw/hfi1/hfi.h
@@ -1597,9 +1597,9 @@ static inline bool process_ecn(struct rvt_qp *qp, struct hfi1_packet *pkt,
 	u32 bth1;
 
 	bth1 = be32_to_cpu(ohdr->bth[1]);
-	if (unlikely(bth1 & (HFI1_BECN_SMASK | HFI1_FECN_SMASK))) {
+	if (unlikely(bth1 & (IB_BECN_SMASK | IB_FECN_SMASK))) {
 		hfi1_process_ecn_slowpath(qp, pkt, do_cnp);
-		return bth1 & HFI1_FECN_SMASK;
+		return bth1 & IB_FECN_SMASK;
 	}
 	return false;
 }
diff --git a/drivers/infiniband/hw/hfi1/rc.c b/drivers/infiniband/hw/hfi1/rc.c
index 623209a..da968b7 100644
--- a/drivers/infiniband/hw/hfi1/rc.c
+++ b/drivers/infiniband/hw/hfi1/rc.c
@@ -773,7 +773,7 @@ void hfi1_send_rc_ack(struct hfi1_ctxtdata *rcd, struct rvt_qp *qp,
 	hdr.lrh[3] = cpu_to_be16(ppd->lid | qp->remote_ah_attr.src_path_bits);
 	ohdr->bth[0] = cpu_to_be32(bth0);
 	ohdr->bth[1] = cpu_to_be32(qp->remote_qpn);
-	ohdr->bth[1] |= cpu_to_be32((!!is_fecn) << HFI1_BECN_SHIFT);
+	ohdr->bth[1] |= cpu_to_be32((!!is_fecn) << IB_BECN_SHIFT);
 	ohdr->bth[2] = cpu_to_be32(mask_psn(qp->r_ack_psn));
 
 	/* Don't try to send ACKs if the link isn't ACTIVE */
diff --git a/drivers/infiniband/hw/hfi1/ruc.c b/drivers/infiniband/hw/hfi1/ruc.c
index 2730915..879eb9b 100644
--- a/drivers/infiniband/hw/hfi1/ruc.c
+++ b/drivers/infiniband/hw/hfi1/ruc.c
@@ -775,7 +775,7 @@ void hfi1_make_ruc_header(struct rvt_qp *qp, struct ib_other_headers *ohdr,
 	if (qp->s_flags & RVT_S_ECN) {
 		qp->s_flags &= ~RVT_S_ECN;
 		/* we recently received a FECN, so return a BECN */
-		bth1 |= (HFI1_BECN_MASK << HFI1_BECN_SHIFT);
+		bth1 |= (IB_BECN_MASK << IB_BECN_SHIFT);
 	}
 	ohdr->bth[1] = cpu_to_be32(bth1);
 	ohdr->bth[2] = cpu_to_be32(bth2);
diff --git a/drivers/infiniband/hw/hfi1/trace_ibhdrs.h b/drivers/infiniband/hw/hfi1/trace_ibhdrs.h
index 382fcda..090f6b5 100644
--- a/drivers/infiniband/hw/hfi1/trace_ibhdrs.h
+++ b/drivers/infiniband/hw/hfi1/trace_ibhdrs.h
@@ -139,11 +139,11 @@
 			__entry->pkey =
 			be32_to_cpu(ohdr->bth[0]) & 0xffff;
 			__entry->f =
-			(be32_to_cpu(ohdr->bth[1]) >> HFI1_FECN_SHIFT) &
-			HFI1_FECN_MASK;
+			(be32_to_cpu(ohdr->bth[1]) >> IB_FECN_SHIFT) &
+			IB_FECN_MASK;
 			__entry->b =
-			(be32_to_cpu(ohdr->bth[1]) >> HFI1_BECN_SHIFT) &
-			HFI1_BECN_MASK;
+			(be32_to_cpu(ohdr->bth[1]) >> IB_BECN_SHIFT) &
+			IB_BECN_MASK;
 			__entry->qpn =
 			be32_to_cpu(ohdr->bth[1]) & RVT_QPN_MASK;
 			__entry->a =
diff --git a/drivers/infiniband/hw/hfi1/ud.c b/drivers/infiniband/hw/hfi1/ud.c
index 8b3403a..45bc3f0 100644
--- a/drivers/infiniband/hw/hfi1/ud.c
+++ b/drivers/infiniband/hw/hfi1/ud.c
@@ -537,7 +537,7 @@ void return_cnp(struct hfi1_ibport *ibp, struct rvt_qp *qp, u32 remote_qpn,
 	bth0 = pkey | (IB_OPCODE_CNP << 24);
 	ohdr->bth[0] = cpu_to_be32(bth0);
 
-	ohdr->bth[1] = cpu_to_be32(remote_qpn | (1 << HFI1_BECN_SHIFT));
+	ohdr->bth[1] = cpu_to_be32(remote_qpn | (1 << IB_BECN_SHIFT));
 	ohdr->bth[2] = 0; /* PSN 0 */
 
 	hdr.lrh[0] = cpu_to_be16(lrh0);
diff --git a/include/rdma/ib_hdrs.h b/include/rdma/ib_hdrs.h
index 9cf42bc..5519f31 100644
--- a/include/rdma/ib_hdrs.h
+++ b/include/rdma/ib_hdrs.h
@@ -74,6 +74,12 @@
 #define IB_GRH_FLOW_MASK	0xFFFFF
 #define IB_GRH_FLOW_SHIFT	0
 #define IB_GRH_NEXT_HDR		0x1B
+#define IB_FECN_SHIFT 31
+#define IB_FECN_MASK 1
+#define IB_FECN_SMASK BIT(IB_FECN_SHIFT)
+#define IB_BECN_SHIFT 30
+#define IB_BECN_MASK 1
+#define IB_BECN_SMASK BIT(IB_BECN_SHIFT)
 
 #define IB_AETH_CREDIT_SHIFT	24
 #define IB_AETH_CREDIT_MASK	0x1F

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[PATCH v2 10/19] IB/hfi1: Prevent kernel QP post send hard lockups

[Dennis Dalessandro]

From: Mike Marciniszyn <mike.marciniszyn-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>

The driver progress routines can call cond_resched() when
a timeslice is exhausted and irqs are enabled.

If the ULP had been holding a spin lock without disabling irqs and
the post send directly called the progress routine, the cond_resched()
could yield allowing another thread from the same ULP to deadlock
on that same lock.

Correct by replacing the current hfi1_do_send() calldown with a unique
one for post send and adding an argument to hfi1_do_send() to indicate
that the send engine is running in a thread.   If the routine is not
running in a thread, avoid calling cond_resched().

CC: <stable-u79uwXL29TY76Z2rM5mHXA@public.gmane.org> # 4.7.x-
Fixes: Commit 831464ce4b74 ("IB/hfi1: Don't call cond_resched in atomic mode when sending packets")
Reviewed-by: Dennis Dalessandro <dennis.dalessandro-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
---
 drivers/infiniband/hw/hfi1/ruc.c   |   26 ++++++++++++++++----------
 drivers/infiniband/hw/hfi1/verbs.c |    4 ++--
 drivers/infiniband/hw/hfi1/verbs.h |    6 ++++--
 3 files changed, 22 insertions(+), 14 deletions(-)

diff --git a/drivers/infiniband/hw/hfi1/ruc.c b/drivers/infiniband/hw/hfi1/ruc.c
index 879eb9b..ccf8d80 100644
--- a/drivers/infiniband/hw/hfi1/ruc.c
+++ b/drivers/infiniband/hw/hfi1/ruc.c
@@ -1,5 +1,5 @@
 /*
- * Copyright(c) 2015, 2016 Intel Corporation.
+ * Copyright(c) 2015 - 2017 Intel Corporation.
  *
  * This file is provided under a dual BSD/GPLv2 license.  When using or
  * redistributing this file, you may do so under either license.
@@ -784,23 +784,29 @@ void hfi1_make_ruc_header(struct rvt_qp *qp, struct ib_other_headers *ohdr,
 /* when sending, force a reschedule every one of these periods */
 #define SEND_RESCHED_TIMEOUT (5 * HZ)  /* 5s in jiffies */
 
+void hfi1_do_send_from_rvt(struct rvt_qp *qp)
+{
+	hfi1_do_send(qp, false);
+}
+
 void _hfi1_do_send(struct work_struct *work)
 {
 	struct iowait *wait = container_of(work, struct iowait, iowork);
 	struct rvt_qp *qp = iowait_to_qp(wait);
 
-	hfi1_do_send(qp);
+	hfi1_do_send(qp, true);
 }
 
 /**
  * hfi1_do_send - perform a send on a QP
  * @work: contains a pointer to the QP
+ * @in_thread: true if in a workqueue thread
  *
  * Process entries in the send work queue until credit or queue is
  * exhausted.  Only allow one CPU to send a packet per QP.
  * Otherwise, two threads could send packets out of order.
  */
-void hfi1_do_send(struct rvt_qp *qp)
+void hfi1_do_send(struct rvt_qp *qp, bool in_thread)
 {
 	struct hfi1_pkt_state ps;
 	struct hfi1_qp_priv *priv = qp->priv;
@@ -868,8 +874,10 @@ void hfi1_do_send(struct rvt_qp *qp)
 			qp->s_hdrwords = 0;
 			/* allow other tasks to run */
 			if (unlikely(time_after(jiffies, timeout))) {
-				if (workqueue_congested(cpu,
-							ps.ppd->hfi1_wq)) {
+				if (!in_thread ||
+				    workqueue_congested(
+						cpu,
+						ps.ppd->hfi1_wq)) {
 					spin_lock_irqsave(
 						&qp->s_lock,
 						ps.flags);
@@ -882,11 +890,9 @@ void hfi1_do_send(struct rvt_qp *qp)
 						*ps.ppd->dd->send_schedule);
 					return;
 				}
-				if (!irqs_disabled()) {
-					cond_resched();
-					this_cpu_inc(
-					   *ps.ppd->dd->send_schedule);
-				}
+				cond_resched();
+				this_cpu_inc(
+					*ps.ppd->dd->send_schedule);
 				timeout = jiffies + (timeout_int) / 8;
 			}
 			spin_lock_irqsave(&qp->s_lock, ps.flags);
diff --git a/drivers/infiniband/hw/hfi1/verbs.c b/drivers/infiniband/hw/hfi1/verbs.c
index 7f49719..e112762 100644
--- a/drivers/infiniband/hw/hfi1/verbs.c
+++ b/drivers/infiniband/hw/hfi1/verbs.c
@@ -1,5 +1,5 @@
 /*
- * Copyright(c) 2015, 2016 Intel Corporation.
+ * Copyright(c) 2015 - 2017 Intel Corporation.
  *
  * This file is provided under a dual BSD/GPLv2 license.  When using or
  * redistributing this file, you may do so under either license.
@@ -1816,7 +1816,7 @@ int hfi1_register_ib_device(struct hfi1_devdata *dd)
 	dd->verbs_dev.rdi.driver_f.qp_priv_free = qp_priv_free;
 	dd->verbs_dev.rdi.driver_f.free_all_qps = free_all_qps;
 	dd->verbs_dev.rdi.driver_f.notify_qp_reset = notify_qp_reset;
-	dd->verbs_dev.rdi.driver_f.do_send = hfi1_do_send;
+	dd->verbs_dev.rdi.driver_f.do_send = hfi1_do_send_from_rvt;
 	dd->verbs_dev.rdi.driver_f.schedule_send = hfi1_schedule_send;
 	dd->verbs_dev.rdi.driver_f.schedule_send_no_lock = _hfi1_schedule_send;
 	dd->verbs_dev.rdi.driver_f.get_pmtu_from_attr = get_pmtu_from_attr;
diff --git a/drivers/infiniband/hw/hfi1/verbs.h b/drivers/infiniband/hw/hfi1/verbs.h
index 6c549e7..46b00ed 100644
--- a/drivers/infiniband/hw/hfi1/verbs.h
+++ b/drivers/infiniband/hw/hfi1/verbs.h
@@ -1,5 +1,5 @@
 /*
- * Copyright(c) 2015, 2016 Intel Corporation.
+ * Copyright(c) 2015 - 2017 Intel Corporation.
  *
  * This file is provided under a dual BSD/GPLv2 license.  When using or
  * redistributing this file, you may do so under either license.
@@ -355,7 +355,9 @@ void hfi1_make_ruc_header(struct rvt_qp *qp, struct ib_other_headers *ohdr,
 
 void _hfi1_do_send(struct work_struct *work);
 
-void hfi1_do_send(struct rvt_qp *qp);
+void hfi1_do_send_from_rvt(struct rvt_qp *qp);
+
+void hfi1_do_send(struct rvt_qp *qp, bool in_thread);
 
 void hfi1_send_complete(struct rvt_qp *qp, struct rvt_swqe *wqe,
 			enum ib_wc_status status);

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[PATCH v2 10/19] IB/hfi1: Prevent kernel QP post send hard lockups

[Dennis Dalessandro]

From: Mike Marciniszyn <mike.marciniszyn@intel.com>

The driver progress routines can call cond_resched() when
a timeslice is exhausted and irqs are enabled.

If the ULP had been holding a spin lock without disabling irqs and
the post send directly called the progress routine, the cond_resched()
could yield allowing another thread from the same ULP to deadlock
on that same lock.

Correct by replacing the current hfi1_do_send() calldown with a unique
one for post send and adding an argument to hfi1_do_send() to indicate
that the send engine is running in a thread.   If the routine is not
running in a thread, avoid calling cond_resched().

CC: <stable@vger.kernel.org> # 4.7.x-
Fixes: Commit 831464ce4b74 ("IB/hfi1: Don't call cond_resched in atomic mode when sending packets")
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
---
 drivers/infiniband/hw/hfi1/ruc.c   |   26 ++++++++++++++++----------
 drivers/infiniband/hw/hfi1/verbs.c |    4 ++--
 drivers/infiniband/hw/hfi1/verbs.h |    6 ++++--
 3 files changed, 22 insertions(+), 14 deletions(-)

diff --git a/drivers/infiniband/hw/hfi1/ruc.c b/drivers/infiniband/hw/hfi1/ruc.c
index 879eb9b..ccf8d80 100644
--- a/drivers/infiniband/hw/hfi1/ruc.c
+++ b/drivers/infiniband/hw/hfi1/ruc.c
@@ -1,5 +1,5 @@
 /*
- * Copyright(c) 2015, 2016 Intel Corporation.
+ * Copyright(c) 2015 - 2017 Intel Corporation.
  *
  * This file is provided under a dual BSD/GPLv2 license.  When using or
  * redistributing this file, you may do so under either license.
@@ -784,23 +784,29 @@ void hfi1_make_ruc_header(struct rvt_qp *qp, struct ib_other_headers *ohdr,
 /* when sending, force a reschedule every one of these periods */
 #define SEND_RESCHED_TIMEOUT (5 * HZ)  /* 5s in jiffies */
 
+void hfi1_do_send_from_rvt(struct rvt_qp *qp)
+{
+	hfi1_do_send(qp, false);
+}
+
 void _hfi1_do_send(struct work_struct *work)
 {
 	struct iowait *wait = container_of(work, struct iowait, iowork);
 	struct rvt_qp *qp = iowait_to_qp(wait);
 
-	hfi1_do_send(qp);
+	hfi1_do_send(qp, true);
 }
 
 /**
  * hfi1_do_send - perform a send on a QP
  * @work: contains a pointer to the QP
+ * @in_thread: true if in a workqueue thread
  *
  * Process entries in the send work queue until credit or queue is
  * exhausted.  Only allow one CPU to send a packet per QP.
  * Otherwise, two threads could send packets out of order.
  */
-void hfi1_do_send(struct rvt_qp *qp)
+void hfi1_do_send(struct rvt_qp *qp, bool in_thread)
 {
 	struct hfi1_pkt_state ps;
 	struct hfi1_qp_priv *priv = qp->priv;
@@ -868,8 +874,10 @@ void hfi1_do_send(struct rvt_qp *qp)
 			qp->s_hdrwords = 0;
 			/* allow other tasks to run */
 			if (unlikely(time_after(jiffies, timeout))) {
-				if (workqueue_congested(cpu,
-							ps.ppd->hfi1_wq)) {
+				if (!in_thread ||
+				    workqueue_congested(
+						cpu,
+						ps.ppd->hfi1_wq)) {
 					spin_lock_irqsave(
 						&qp->s_lock,
 						ps.flags);
@@ -882,11 +890,9 @@ void hfi1_do_send(struct rvt_qp *qp)
 						*ps.ppd->dd->send_schedule);
 					return;
 				}
-				if (!irqs_disabled()) {
-					cond_resched();
-					this_cpu_inc(
-					   *ps.ppd->dd->send_schedule);
-				}
+				cond_resched();
+				this_cpu_inc(
+					*ps.ppd->dd->send_schedule);
 				timeout = jiffies + (timeout_int) / 8;
 			}
 			spin_lock_irqsave(&qp->s_lock, ps.flags);
diff --git a/drivers/infiniband/hw/hfi1/verbs.c b/drivers/infiniband/hw/hfi1/verbs.c
index 7f49719..e112762 100644
--- a/drivers/infiniband/hw/hfi1/verbs.c
+++ b/drivers/infiniband/hw/hfi1/verbs.c
@@ -1,5 +1,5 @@
 /*
- * Copyright(c) 2015, 2016 Intel Corporation.
+ * Copyright(c) 2015 - 2017 Intel Corporation.
  *
  * This file is provided under a dual BSD/GPLv2 license.  When using or
  * redistributing this file, you may do so under either license.
@@ -1816,7 +1816,7 @@ int hfi1_register_ib_device(struct hfi1_devdata *dd)
 	dd->verbs_dev.rdi.driver_f.qp_priv_free = qp_priv_free;
 	dd->verbs_dev.rdi.driver_f.free_all_qps = free_all_qps;
 	dd->verbs_dev.rdi.driver_f.notify_qp_reset = notify_qp_reset;
-	dd->verbs_dev.rdi.driver_f.do_send = hfi1_do_send;
+	dd->verbs_dev.rdi.driver_f.do_send = hfi1_do_send_from_rvt;
 	dd->verbs_dev.rdi.driver_f.schedule_send = hfi1_schedule_send;
 	dd->verbs_dev.rdi.driver_f.schedule_send_no_lock = _hfi1_schedule_send;
 	dd->verbs_dev.rdi.driver_f.get_pmtu_from_attr = get_pmtu_from_attr;
diff --git a/drivers/infiniband/hw/hfi1/verbs.h b/drivers/infiniband/hw/hfi1/verbs.h
index 6c549e7..46b00ed 100644
--- a/drivers/infiniband/hw/hfi1/verbs.h
+++ b/drivers/infiniband/hw/hfi1/verbs.h
@@ -1,5 +1,5 @@
 /*
- * Copyright(c) 2015, 2016 Intel Corporation.
+ * Copyright(c) 2015 - 2017 Intel Corporation.
  *
  * This file is provided under a dual BSD/GPLv2 license.  When using or
  * redistributing this file, you may do so under either license.
@@ -355,7 +355,9 @@ void hfi1_make_ruc_header(struct rvt_qp *qp, struct ib_other_headers *ohdr,
 
 void _hfi1_do_send(struct work_struct *work);
 
-void hfi1_do_send(struct rvt_qp *qp);
+void hfi1_do_send_from_rvt(struct rvt_qp *qp);
+
+void hfi1_do_send(struct rvt_qp *qp, bool in_thread);
 
 void hfi1_send_complete(struct rvt_qp *qp, struct rvt_swqe *wqe,
 			enum ib_wc_status status);

[PATCH v2 11/19] IB/hfi1: Fix softlockup issue

[Dennis Dalessandro]

From: Tadeusz Struk <tadeusz.struk-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>

Soft lockups can occur because the mad processing on different CPUs acquire
the spin lock dc8051_lock:

[534552.835870]  [<ffffffffa026f993>] ? read_dev_port_cntr.isra.37+0x23/0x160 [hfi1]
[534552.835880]  [<ffffffffa02775af>] read_dev_cntr+0x4f/0x60 [hfi1]
[534552.835893]  [<ffffffffa028d7cd>] pma_get_opa_portstatus+0x64d/0x8c0 [hfi1]
[534552.835904]  [<ffffffffa0290e7d>] hfi1_process_mad+0x48d/0x18c0 [hfi1]
[534552.835908]  [<ffffffff811dc1f1>] ? __slab_free+0x81/0x2f0
[534552.835936]  [<ffffffffa024c34e>] ? ib_mad_recv_done+0x21e/0xa30 [ib_core]
[534552.835939]  [<ffffffff811dd153>] ? __kmalloc+0x1f3/0x240
[534552.835947]  [<ffffffffa024c3fb>] ib_mad_recv_done+0x2cb/0xa30 [ib_core]
[534552.835955]  [<ffffffffa0237c85>] __ib_process_cq+0x55/0xd0 [ib_core]
[534552.835962]  [<ffffffffa0237d70>] ib_cq_poll_work+0x20/0x60 [ib_core]
[534552.835964]  [<ffffffff810a7f3b>] process_one_work+0x17b/0x470
[534552.835966]  [<ffffffff810a8d76>] worker_thread+0x126/0x410
[534552.835969]  [<ffffffff810a8c50>] ? rescuer_thread+0x460/0x460
[534552.835971]  [<ffffffff810b052f>] kthread+0xcf/0xe0
[534552.835974]  [<ffffffff810b0460>] ? kthread_create_on_node+0x140/0x140
[534552.835977]  [<ffffffff81696418>] ret_from_fork+0x58/0x90
[534552.835980]  [<ffffffff810b0460>] ? kthread_create_on_node+0x140/0x140

This issue is made worse when the 8051 is busy and the reads take longer.
Fix by using a non-spinning lock procure.

Reviewed-by: Michael J. Ruhl <michael.j.ruhl-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Reviewed-by: Mike Marciszyn <mike.marciniszyn-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Tadeusz Struk <tadeusz.struk-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
---
 drivers/infiniband/hw/hfi1/chip.c |   86 ++++++++++++++++++++++---------------
 drivers/infiniband/hw/hfi1/hfi.h  |    7 ++-
 drivers/infiniband/hw/hfi1/init.c |    2 -
 3 files changed, 57 insertions(+), 38 deletions(-)

diff --git a/drivers/infiniband/hw/hfi1/chip.c b/drivers/infiniband/hw/hfi1/chip.c
index 79a316a..6b70d1d 100644
--- a/drivers/infiniband/hw/hfi1/chip.c
+++ b/drivers/infiniband/hw/hfi1/chip.c
@@ -6381,18 +6381,17 @@ static void lcb_shutdown(struct hfi1_devdata *dd, int abort)
  *
  * The expectation is that the caller of this routine would have taken
  * care of properly transitioning the link into the correct state.
+ * NOTE: the caller needs to acquire the dd->dc8051_lock lock
+ *       before calling this function.
  */
-static void dc_shutdown(struct hfi1_devdata *dd)
+static void _dc_shutdown(struct hfi1_devdata *dd)
 {
-	unsigned long flags;
+	lockdep_assert_held(&dd->dc8051_lock);
 
-	spin_lock_irqsave(&dd->dc8051_lock, flags);
-	if (dd->dc_shutdown) {
-		spin_unlock_irqrestore(&dd->dc8051_lock, flags);
+	if (dd->dc_shutdown)
 		return;
-	}
+
 	dd->dc_shutdown = 1;
-	spin_unlock_irqrestore(&dd->dc8051_lock, flags);
 	/* Shutdown the LCB */
 	lcb_shutdown(dd, 1);
 	/*
@@ -6403,35 +6402,45 @@ static void dc_shutdown(struct hfi1_devdata *dd)
 	write_csr(dd, DC_DC8051_CFG_RST, 0x1);
 }
 
+static void dc_shutdown(struct hfi1_devdata *dd)
+{
+	mutex_lock(&dd->dc8051_lock);
+	_dc_shutdown(dd);
+	mutex_unlock(&dd->dc8051_lock);
+}
+
 /*
  * Calling this after the DC has been brought out of reset should not
  * do any damage.
+ * NOTE: the caller needs to acquire the dd->dc8051_lock lock
+ *       before calling this function.
  */
-static void dc_start(struct hfi1_devdata *dd)
+static void _dc_start(struct hfi1_devdata *dd)
 {
-	unsigned long flags;
-	int ret;
+	lockdep_assert_held(&dd->dc8051_lock);
 
-	spin_lock_irqsave(&dd->dc8051_lock, flags);
 	if (!dd->dc_shutdown)
-		goto done;
-	spin_unlock_irqrestore(&dd->dc8051_lock, flags);
+		return;
+
 	/* Take the 8051 out of reset */
 	write_csr(dd, DC_DC8051_CFG_RST, 0ull);
 	/* Wait until 8051 is ready */
-	ret = wait_fm_ready(dd, TIMEOUT_8051_START);
-	if (ret) {
+	if (wait_fm_ready(dd, TIMEOUT_8051_START))
 		dd_dev_err(dd, "%s: timeout starting 8051 firmware\n",
 			   __func__);
-	}
+
 	/* Take away reset for LCB and RX FPE (set in lcb_shutdown). */
 	write_csr(dd, DCC_CFG_RESET, 0x10);
 	/* lcb_shutdown() with abort=1 does not restore these */
 	write_csr(dd, DC_LCB_ERR_EN, dd->lcb_err_en);
-	spin_lock_irqsave(&dd->dc8051_lock, flags);
 	dd->dc_shutdown = 0;
-done:
-	spin_unlock_irqrestore(&dd->dc8051_lock, flags);
+}
+
+static void dc_start(struct hfi1_devdata *dd)
+{
+	mutex_lock(&dd->dc8051_lock);
+	_dc_start(dd);
+	mutex_unlock(&dd->dc8051_lock);
 }
 
 /*
@@ -8475,16 +8484,11 @@ static int do_8051_command(
 {
 	u64 reg, completed;
 	int return_code;
-	unsigned long flags;
 	unsigned long timeout;
 
 	hfi1_cdbg(DC8051, "type %d, data 0x%012llx", type, in_data);
 
-	/*
-	 * Alternative to holding the lock for a long time:
-	 * - keep busy wait - have other users bounce off
-	 */
-	spin_lock_irqsave(&dd->dc8051_lock, flags);
+	mutex_lock(&dd->dc8051_lock);
 
 	/* We can't send any commands to the 8051 if it's in reset */
 	if (dd->dc_shutdown) {
@@ -8510,10 +8514,8 @@ static int do_8051_command(
 			return_code = -ENXIO;
 			goto fail;
 		}
-		spin_unlock_irqrestore(&dd->dc8051_lock, flags);
-		dc_shutdown(dd);
-		dc_start(dd);
-		spin_lock_irqsave(&dd->dc8051_lock, flags);
+		_dc_shutdown(dd);
+		_dc_start(dd);
 	}
 
 	/*
@@ -8594,8 +8596,7 @@ static int do_8051_command(
 	write_csr(dd, DC_DC8051_CFG_HOST_CMD_0, 0);
 
 fail:
-	spin_unlock_irqrestore(&dd->dc8051_lock, flags);
-
+	mutex_unlock(&dd->dc8051_lock);
 	return return_code;
 }
 
@@ -11969,6 +11970,10 @@ static void free_cntrs(struct hfi1_devdata *dd)
 	dd->scntrs = NULL;
 	kfree(dd->cntrnames);
 	dd->cntrnames = NULL;
+	if (dd->update_cntr_wq) {
+		destroy_workqueue(dd->update_cntr_wq);
+		dd->update_cntr_wq = NULL;
+	}
 }
 
 static u64 read_dev_port_cntr(struct hfi1_devdata *dd, struct cntr_entry *entry,
@@ -12124,7 +12129,7 @@ u64 write_port_cntr(struct hfi1_pportdata *ppd, int index, int vl, u64 data)
 	return write_dev_port_cntr(ppd->dd, entry, sval, ppd, vl, data);
 }
 
-static void update_synth_timer(unsigned long opaque)
+static void do_update_synth_timer(struct work_struct *work)
 {
 	u64 cur_tx;
 	u64 cur_rx;
@@ -12133,8 +12138,8 @@ static void update_synth_timer(unsigned long opaque)
 	int i, j, vl;
 	struct hfi1_pportdata *ppd;
 	struct cntr_entry *entry;
-
-	struct hfi1_devdata *dd = (struct hfi1_devdata *)opaque;
+	struct hfi1_devdata *dd = container_of(work, struct hfi1_devdata,
+					       update_cntr_work);
 
 	/*
 	 * Rather than keep beating on the CSRs pick a minimal set that we can
@@ -12217,7 +12222,13 @@ static void update_synth_timer(unsigned long opaque)
 	} else {
 		hfi1_cdbg(CNTR, "[%d] No update necessary", dd->unit);
 	}
+}
 
+static void update_synth_timer(unsigned long opaque)
+{
+	struct hfi1_devdata *dd = (struct hfi1_devdata *)opaque;
+
+	queue_work(dd->update_cntr_wq, &dd->update_cntr_work);
 	mod_timer(&dd->synth_stats_timer, jiffies + HZ * SYNTH_CNT_TIME);
 }
 
@@ -12453,6 +12464,13 @@ static int init_cntrs(struct hfi1_devdata *dd)
 	if (init_cpu_counters(dd))
 		goto bail;
 
+	dd->update_cntr_wq = alloc_ordered_workqueue("hfi1_update_cntr_%d",
+						     WQ_MEM_RECLAIM, dd->unit);
+	if (!dd->update_cntr_wq)
+		goto bail;
+
+	INIT_WORK(&dd->update_cntr_work, do_update_synth_timer);
+
 	mod_timer(&dd->synth_stats_timer, jiffies + HZ * SYNTH_CNT_TIME);
 	return 0;
 bail:
diff --git a/drivers/infiniband/hw/hfi1/hfi.h b/drivers/infiniband/hw/hfi1/hfi.h
index 79c4289..c6b6853 100644
--- a/drivers/infiniband/hw/hfi1/hfi.h
+++ b/drivers/infiniband/hw/hfi1/hfi.h
@@ -474,7 +474,7 @@ struct hfi1_packet {
 #define HFI1_PART_ENFORCE_OUT	0x2
 
 /* how often we check for synthetic counter wrap around */
-#define SYNTH_CNT_TIME 2
+#define SYNTH_CNT_TIME 3
 
 /* Counter flags */
 #define CNTR_NORMAL		0x0 /* Normal counters, just read register */
@@ -926,8 +926,9 @@ struct hfi1_devdata {
 	spinlock_t rcvctrl_lock; /* protect changes to RcvCtrl */
 	/* around rcd and (user ctxts) ctxt_cnt use (intr vs free) */
 	spinlock_t uctxt_lock; /* rcd and user context changes */
-	/* exclusive access to 8051 */
-	spinlock_t dc8051_lock;
+	struct mutex dc8051_lock; /* exclusive access to 8051 */
+	struct workqueue_struct *update_cntr_wq;
+	struct work_struct update_cntr_work;
 	/* exclusive access to 8051 memory */
 	spinlock_t dc8051_memlock;
 	int dc8051_timed_out;	/* remember if the 8051 timed out */
diff --git a/drivers/infiniband/hw/hfi1/init.c b/drivers/infiniband/hw/hfi1/init.c
index 9bfb8eb..55a11a6 100644
--- a/drivers/infiniband/hw/hfi1/init.c
+++ b/drivers/infiniband/hw/hfi1/init.c
@@ -1078,11 +1078,11 @@ struct hfi1_devdata *hfi1_alloc_devdata(struct pci_dev *pdev, size_t extra)
 	spin_lock_init(&dd->uctxt_lock);
 	spin_lock_init(&dd->hfi1_diag_trans_lock);
 	spin_lock_init(&dd->sc_init_lock);
-	spin_lock_init(&dd->dc8051_lock);
 	spin_lock_init(&dd->dc8051_memlock);
 	seqlock_init(&dd->sc2vl_lock);
 	spin_lock_init(&dd->sde_map_lock);
 	spin_lock_init(&dd->pio_map_lock);
+	mutex_init(&dd->dc8051_lock);
 	init_waitqueue_head(&dd->event_queue);
 
 	dd->int_counter = alloc_percpu(u64);

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[PATCH v2 12/19] IB/hfi1: Adjust high temperature warning for QSFP cable

[Dennis Dalessandro]

From: Neel Desai <neel.desai-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>

When we receive a QSFP_HIGH_TEMP_ALARM or QSFP_HIGH_TEMP_WARNING
interrupt, print a "QSFP cable temperature too high" message.

Reviewed-by: Easwar Hariharan <easwar.hariharan-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Reviewed-by: Dennis Dalessandro <dennis.dalessandro-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Neel Desai <neel.desai-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
---
 drivers/infiniband/hw/hfi1/chip.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/infiniband/hw/hfi1/chip.c b/drivers/infiniband/hw/hfi1/chip.c
index 6b70d1d..0fec6be 100644
--- a/drivers/infiniband/hw/hfi1/chip.c
+++ b/drivers/infiniband/hw/hfi1/chip.c
@@ -9325,7 +9325,7 @@ static int handle_qsfp_error_conditions(struct hfi1_pportdata *ppd,
 
 	if ((qsfp_interrupt_status[0] & QSFP_HIGH_TEMP_ALARM) ||
 	    (qsfp_interrupt_status[0] & QSFP_HIGH_TEMP_WARNING))
-		dd_dev_info(dd, "%s: QSFP cable on fire\n",
+		dd_dev_info(dd, "%s: QSFP cable temperature too high\n",
 			    __func__);
 
 	if ((qsfp_interrupt_status[0] & QSFP_LOW_TEMP_ALARM) ||

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[PATCH v2 13/19] IB/hfi1: Cache neighbor secure data after link up

[Dennis Dalessandro]

From: Stuart Summers <john.s.summers-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>

Secure data is transferred across the link during verify
cap. This includes Neighbor Guid, Type, and Port Number.
This transfer is not guaranteed to complete until the 8051
firmware has completed processing of the state_complete
frame. Move the consumption of this data from verify cap
handling to link up handling to ensure the data is finalized.

Additionally, do not notify the SM that the link is up until
after this data is actually available.

Reviewed-by: Ira Weiny <ira.weiny-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Reviewed-by: Easwar Hariharan <easwar.hariharan-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Reviewed-by: Mike Marciniszyn <mike.marciniszyn-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Stuart Summers <john.s.summers-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
---
 drivers/infiniband/hw/hfi1/chip.c |   27 +--------------------------
 drivers/infiniband/hw/hfi1/hfi.h  |   11 ++++++++++-
 drivers/infiniband/hw/hfi1/intr.c |   27 ++++++++++++++++-----------
 3 files changed, 27 insertions(+), 38 deletions(-)

diff --git a/drivers/infiniband/hw/hfi1/chip.c b/drivers/infiniband/hw/hfi1/chip.c
index 0fec6be..1ce560e 100644
--- a/drivers/infiniband/hw/hfi1/chip.c
+++ b/drivers/infiniband/hw/hfi1/chip.c
@@ -7288,15 +7288,6 @@ void handle_verify_cap(struct work_struct *work)
 	lcb_shutdown(dd, 0);
 	adjust_lcb_for_fpga_serdes(dd);
 
-	/*
-	 * These are now valid:
-	 *	remote VerifyCap fields in the general LNI config
-	 *	CSR DC8051_STS_REMOTE_GUID
-	 *	CSR DC8051_STS_REMOTE_NODE_TYPE
-	 *	CSR DC8051_STS_REMOTE_FM_SECURITY
-	 *	CSR DC8051_STS_REMOTE_PORT_NO
-	 */
-
 	read_vc_remote_phy(dd, &power_management, &continious);
 	read_vc_remote_fabric(dd, &vau, &z, &vcu, &vl15buf,
 			      &partner_supported_crc);
@@ -7427,20 +7418,6 @@ void handle_verify_cap(struct work_struct *work)
 	write_csr(dd, DC_LCB_ERR_EN, 0); /* mask LCB errors */
 	set_8051_lcb_access(dd);
 
-	ppd->neighbor_guid =
-		read_csr(dd, DC_DC8051_STS_REMOTE_GUID);
-	ppd->neighbor_port_number = read_csr(dd, DC_DC8051_STS_REMOTE_PORT_NO) &
-					DC_DC8051_STS_REMOTE_PORT_NO_VAL_SMASK;
-	ppd->neighbor_type =
-		read_csr(dd, DC_DC8051_STS_REMOTE_NODE_TYPE) &
-		DC_DC8051_STS_REMOTE_NODE_TYPE_VAL_MASK;
-	ppd->neighbor_fm_security =
-		read_csr(dd, DC_DC8051_STS_REMOTE_FM_SECURITY) &
-		DC_DC8051_STS_LOCAL_FM_SECURITY_DISABLED_MASK;
-	dd_dev_info(dd,
-		    "Neighbor Guid: %llx Neighbor type %d MgmtAllowed %d FM security bypass %d\n",
-		    ppd->neighbor_guid, ppd->neighbor_type,
-		    ppd->mgmt_allowed, ppd->neighbor_fm_security);
 	if (ppd->mgmt_allowed)
 		add_full_mgmt_pkey(ppd);
 
@@ -10497,11 +10474,8 @@ int set_link_state(struct hfi1_pportdata *ppd, u32 state)
 			goto unexpected;
 		}
 
-		ppd->host_link_state = HLS_UP_INIT;
 		ret = wait_logical_linkstate(ppd, IB_PORT_INIT, 1000);
 		if (ret) {
-			/* logical state didn't change, stay at going_up */
-			ppd->host_link_state = HLS_GOING_UP;
 			dd_dev_err(dd,
 				   "%s: logical state did not change to INIT\n",
 				   __func__);
@@ -10515,6 +10489,7 @@ int set_link_state(struct hfi1_pportdata *ppd, u32 state)
 			add_rcvctrl(dd, RCV_CTRL_RCV_PORT_ENABLE_SMASK);
 
 			handle_linkup_change(dd, 1);
+			ppd->host_link_state = HLS_UP_INIT;
 		}
 		break;
 	case HLS_UP_ARMED:
diff --git a/drivers/infiniband/hw/hfi1/hfi.h b/drivers/infiniband/hw/hfi1/hfi.h
index c6b6853..fec6eb6 100644
--- a/drivers/infiniband/hw/hfi1/hfi.h
+++ b/drivers/infiniband/hw/hfi1/hfi.h
@@ -1256,7 +1256,16 @@ void hfi1_init_pportdata(struct pci_dev *, struct hfi1_pportdata *,
 /* return the driver's idea of the logical OPA port state */
 static inline u32 driver_lstate(struct hfi1_pportdata *ppd)
 {
-	return ppd->lstate; /* use the cached value */
+	/*
+	 * The driver does some processing from the time the logical
+	 * link state is at INIT to the time the SM can be notified
+	 * as such. Return IB_PORT_DOWN until the software state
+	 * is ready.
+	 */
+	if (ppd->lstate == IB_PORT_INIT && !(ppd->host_link_state & HLS_UP))
+		return IB_PORT_DOWN;
+	else
+		return ppd->lstate;
 }
 
 void receive_interrupt_work(struct work_struct *work);
diff --git a/drivers/infiniband/hw/hfi1/intr.c b/drivers/infiniband/hw/hfi1/intr.c
index 65348d1..232014d 100644
--- a/drivers/infiniband/hw/hfi1/intr.c
+++ b/drivers/infiniband/hw/hfi1/intr.c
@@ -131,19 +131,24 @@ void handle_linkup_change(struct hfi1_devdata *dd, u32 linkup)
 		if (quick_linkup || dd->icode == ICODE_FUNCTIONAL_SIMULATOR) {
 			set_up_vl15(dd, dd->vau, dd->vl15_init);
 			assign_remote_cm_au_table(dd, dd->vcu);
-			ppd->neighbor_guid =
-				read_csr(dd, DC_DC8051_STS_REMOTE_GUID);
-			ppd->neighbor_type =
-				read_csr(dd, DC_DC8051_STS_REMOTE_NODE_TYPE) &
-					DC_DC8051_STS_REMOTE_NODE_TYPE_VAL_MASK;
-			ppd->neighbor_port_number =
-				read_csr(dd, DC_DC8051_STS_REMOTE_PORT_NO) &
-					 DC_DC8051_STS_REMOTE_PORT_NO_VAL_SMASK;
-			dd_dev_info(dd, "Neighbor GUID: %llx Neighbor type %d\n",
-				    ppd->neighbor_guid,
-				    ppd->neighbor_type);
 		}
 
+		ppd->neighbor_guid =
+			read_csr(dd, DC_DC8051_STS_REMOTE_GUID);
+		ppd->neighbor_type =
+			read_csr(dd, DC_DC8051_STS_REMOTE_NODE_TYPE) &
+				 DC_DC8051_STS_REMOTE_NODE_TYPE_VAL_MASK;
+		ppd->neighbor_port_number =
+			read_csr(dd, DC_DC8051_STS_REMOTE_PORT_NO) &
+				 DC_DC8051_STS_REMOTE_PORT_NO_VAL_SMASK;
+		ppd->neighbor_fm_security =
+			read_csr(dd, DC_DC8051_STS_REMOTE_FM_SECURITY) &
+				 DC_DC8051_STS_LOCAL_FM_SECURITY_DISABLED_MASK;
+		dd_dev_info(dd,
+			    "Neighbor Guid %llx, Type %d, Port Num %d\n",
+			    ppd->neighbor_guid, ppd->neighbor_type,
+			    ppd->neighbor_port_number);
+
 		/* physical link went up */
 		ppd->linkup = 1;
 		ppd->offline_disabled_reason =

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[PATCH v2 14/19] IB/hfi1: Permanently enable P_Key checking in HFI

[Dennis Dalessandro]

From: Neel Desai <neel.desai-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>

Ingress and egress port P_Key checking should always be performed for
HFIs. This patch will enable ingress and egress P_Key checking when
the port is initialized and will ignore the P_Key information sent by
the FM in the port info structure which is meant to be used only by the
switch.

Reviewed-by: Easwar Hariharan <easwar.hariharan-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Reviewed-by: Dennis Dalessandro <dennis.dalessandro-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Neel Desai <neel.desai-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
---
 drivers/infiniband/hw/hfi1/init.c |    3 +++
 drivers/infiniband/hw/hfi1/mad.c  |   10 ----------
 2 files changed, 3 insertions(+), 10 deletions(-)

diff --git a/drivers/infiniband/hw/hfi1/init.c b/drivers/infiniband/hw/hfi1/init.c
index 55a11a6..838d3a8 100644
--- a/drivers/infiniband/hw/hfi1/init.c
+++ b/drivers/infiniband/hw/hfi1/init.c
@@ -482,6 +482,9 @@ void hfi1_init_pportdata(struct pci_dev *pdev, struct hfi1_pportdata *ppd,
 	default_pkey_idx = 1;
 
 	ppd->pkeys[default_pkey_idx] = DEFAULT_P_KEY;
+	ppd->part_enforce |= HFI1_PART_ENFORCE_IN;
+	ppd->part_enforce |= HFI1_PART_ENFORCE_OUT;
+
 	if (loopback) {
 		hfi1_early_err(&pdev->dev,
 			       "Faking data partition 0x8001 in idx %u\n",
diff --git a/drivers/infiniband/hw/hfi1/mad.c b/drivers/infiniband/hw/hfi1/mad.c
index db5494d..7059a0f 100644
--- a/drivers/infiniband/hw/hfi1/mad.c
+++ b/drivers/infiniband/hw/hfi1/mad.c
@@ -1151,16 +1151,6 @@ static int __subn_set_opa_portinfo(struct opa_smp *smp, u32 am, u8 *data,
 		ppd->linkinit_reason =
 			(pi->partenforce_filterraw &
 			 OPA_PI_MASK_LINKINIT_REASON);
-	/* enable/disable SW pkey checking as per FM control */
-	if (pi->partenforce_filterraw & OPA_PI_MASK_PARTITION_ENFORCE_IN)
-		ppd->part_enforce |= HFI1_PART_ENFORCE_IN;
-	else
-		ppd->part_enforce &= ~HFI1_PART_ENFORCE_IN;
-
-	if (pi->partenforce_filterraw & OPA_PI_MASK_PARTITION_ENFORCE_OUT)
-		ppd->part_enforce |= HFI1_PART_ENFORCE_OUT;
-	else
-		ppd->part_enforce &= ~HFI1_PART_ENFORCE_OUT;
 
 	/* Must be a valid unicast LID address. */
 	if ((smlid == 0 && ls_old > IB_PORT_INIT) ||

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[PATCH v2 15/19] IB/hfi1: Fix misspelling in comment

[Dennis Dalessandro]

Checkpatch flagged a misspelled word. Fix it.

Fixes: 8764522e5251 ("staging/rdma/hfi1: Unexpected link up pkey values are not an error")
Signed-off-by: Dennis Dalessandro <dennis.dalessandro-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
---
 drivers/infiniband/hw/hfi1/chip.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/infiniband/hw/hfi1/chip.c b/drivers/infiniband/hw/hfi1/chip.c
index 1ce560e..500b857 100644
--- a/drivers/infiniband/hw/hfi1/chip.c
+++ b/drivers/infiniband/hw/hfi1/chip.c
@@ -7088,7 +7088,7 @@ static void add_full_mgmt_pkey(struct hfi1_pportdata *ppd)
 {
 	struct hfi1_devdata *dd = ppd->dd;
 
-	/* Sanity check - ppd->pkeys[2] should be 0, or already initalized */
+	/* Sanity check - ppd->pkeys[2] should be 0, or already initialized */
 	if (!((ppd->pkeys[2] == 0) || (ppd->pkeys[2] == FULL_MGMT_P_KEY)))
 		dd_dev_warn(dd, "%s pkey[2] already set to 0x%x, resetting it to 0x%x\n",
 			    __func__, ppd->pkeys[2], FULL_MGMT_P_KEY);

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[PATCH v2 16/19] IB/hfi1: Convert %Lx to %llx

[Dennis Dalessandro]

According to checkpatch %Lx is not standard C so remove it and use the
suggested %llx.

Fixes: 7724105686e7 ("IB/hfi1: add driver files")
Signed-off-by: Dennis Dalessandro <dennis.dalessandro-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
---
 drivers/infiniband/hw/hfi1/pcie.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/infiniband/hw/hfi1/pcie.c b/drivers/infiniband/hw/hfi1/pcie.c
index 0829fce..e39e01b 100644
--- a/drivers/infiniband/hw/hfi1/pcie.c
+++ b/drivers/infiniband/hw/hfi1/pcie.c
@@ -583,7 +583,7 @@ static void tune_pcie_caps(struct hfi1_devdata *dd)
 		if (words == ~0ULL)
 			ret = PCI_ERS_RESULT_NEED_RESET;
 		dd_dev_info(dd,
-			    "HFI1 mmio_enabled function called, read wordscntr %Lx, returning %d\n",
+			    "HFI1 mmio_enabled function called, read wordscntr %llx, returning %d\n",
 			    words, ret);
 	}
 	return  ret;

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[PATCH v2 17/19] IB/hfi1: Fix unbalanced braces around else

[Dennis Dalessandro]

Add missing braces around else blocks in a few places to make checkpatch
happy.

Fixes: 7724105686e7 ("IB/hfi1: add driver files")
Signed-off-by: Dennis Dalessandro <dennis.dalessandro-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
---
 drivers/infiniband/hw/hfi1/chip.c |    4 ++--
 drivers/infiniband/hw/hfi1/init.c |    6 ++++--
 2 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/infiniband/hw/hfi1/chip.c b/drivers/infiniband/hw/hfi1/chip.c
index 500b857..e97851a 100644
--- a/drivers/infiniband/hw/hfi1/chip.c
+++ b/drivers/infiniband/hw/hfi1/chip.c
@@ -8147,10 +8147,10 @@ static irqreturn_t sdma_interrupt(int irq, void *data)
 
 		/* handle the interrupt(s) */
 		sdma_engine_interrupt(sde, status);
-	} else
+	} else {
 		dd_dev_err(dd, "SDMA engine %u interrupt, but no status bits set\n",
 			   sde->this_idx);
-
+	}
 	return IRQ_HANDLED;
 }
 
diff --git a/drivers/infiniband/hw/hfi1/init.c b/drivers/infiniband/hw/hfi1/init.c
index 838d3a8..e9b33c8 100644
--- a/drivers/infiniband/hw/hfi1/init.c
+++ b/drivers/infiniband/hw/hfi1/init.c
@@ -245,9 +245,10 @@ struct hfi1_ctxtdata *hfi1_create_ctxtdata(struct hfi1_pportdata *ppd, u32 ctxt,
 			if (ctxt < kctxt_ngroups) {
 				base = ctxt * (dd->rcv_entries.ngroups + 1);
 				rcd->rcv_array_groups++;
-			} else
+			} else {
 				base = kctxt_ngroups +
 					(ctxt * dd->rcv_entries.ngroups);
+			}
 		} else {
 			u16 ct = ctxt - dd->first_user_ctxt;
 
@@ -256,9 +257,10 @@ struct hfi1_ctxtdata *hfi1_create_ctxtdata(struct hfi1_pportdata *ppd, u32 ctxt,
 			if (ct < dd->rcv_entries.nctxt_extra) {
 				base += ct * (dd->rcv_entries.ngroups + 1);
 				rcd->rcv_array_groups++;
-			} else
+			} else {
 				base += dd->rcv_entries.nctxt_extra +
 					(ct * dd->rcv_entries.ngroups);
+			}
 		}
 		rcd->eager_base = base * dd->rcv_entries.group_size;
 

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[PATCH v2 18/19] IB/hfi: Protect against writable mmap

[Dennis Dalessandro]

From: Ira Weiny <ira.weiny-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>

The device/port status is not intended to be changed from user space.
Prevent a user from mapping them as write or execute.

Reviewed-by: Dennis Dalessandro <dennis.dalessandro-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Ira Weiny <ira.weiny-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
---
 drivers/infiniband/hw/hfi1/file_ops.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/drivers/infiniband/hw/hfi1/file_ops.c b/drivers/infiniband/hw/hfi1/file_ops.c
index f78c739..d575499 100644
--- a/drivers/infiniband/hw/hfi1/file_ops.c
+++ b/drivers/infiniband/hw/hfi1/file_ops.c
@@ -597,6 +597,10 @@ static int hfi1_file_mmap(struct file *fp, struct vm_area_struct *vma)
 		vmf = 1;
 		break;
 	case STATUS:
+		if (flags & (unsigned long)(VM_WRITE | VM_EXEC)) {
+			ret = -EPERM;
+			goto done;
+		}
 		memaddr = kvirt_to_phys((void *)dd->status);
 		memlen = PAGE_SIZE;
 		flags |= VM_IO | VM_DONTEXPAND;

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[PATCH v2 19/19] IB/hfi1: Use bool in process_ecn

[Dennis Dalessandro]

The process_ecn intends to return a bool value. However it is doing
so incorrectly by ANDing the fecn mask. The fecn bit is bit 31. Bool is
not a native data type and is up to the compiler to implement how it
sees fit. It is conceivable that this upper bit gets washed out.

Fix by converting to a bool properly.

Cc: stable@vger.kernel.org
Fixes: Commit fd2b562edca6 ("IB/hfi1: Pull FECN/BECN processing to a common place")
Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
---
 drivers/infiniband/hw/hfi1/hfi.h |    2 +-
 drivers/infiniband/hw/hfi1/rc.c  |    3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/infiniband/hw/hfi1/hfi.h b/drivers/infiniband/hw/hfi1/hfi.h
index fec6eb6..51fffdf 100644
--- a/drivers/infiniband/hw/hfi1/hfi.h
+++ b/drivers/infiniband/hw/hfi1/hfi.h
@@ -1609,7 +1609,7 @@ static inline bool process_ecn(struct rvt_qp *qp, struct hfi1_packet *pkt,
 	bth1 = be32_to_cpu(ohdr->bth[1]);
 	if (unlikely(bth1 & (IB_BECN_SMASK | IB_FECN_SMASK))) {
 		hfi1_process_ecn_slowpath(qp, pkt, do_cnp);
-		return bth1 & IB_FECN_SMASK;
+		return !!(bth1 & IB_FECN_SMASK);
 	}
 	return false;
 }
diff --git a/drivers/infiniband/hw/hfi1/rc.c b/drivers/infiniband/hw/hfi1/rc.c
index da968b7..9b3333f 100644
--- a/drivers/infiniband/hw/hfi1/rc.c
+++ b/drivers/infiniband/hw/hfi1/rc.c
@@ -1930,7 +1930,8 @@ void hfi1_rc_rcv(struct hfi1_packet *packet)
 	int diff;
 	struct ib_reth *reth;
 	unsigned long flags;
-	int ret, is_fecn = 0;
+	int ret;
+	bool is_fecn = false;
 	bool copy_last = false;
 	u32 rkey;