Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband:
  IB/mlx4: Fix MTT leakage in resize CQ
  IB/ehca: Fix problem with generated flush work completions
  IB/ehca: Change misleading error message on memory hotplug
  mlx4_core: Save/restore default port IB capability mask

8 files changed, 106 insertions, 31 deletions

diff --git a/drivers/infiniband/hw/ehca/ehca_classes.h b/drivers/infiniband/hw/ehca/ehca_classes.h
index 4df887af66a5..7fc35cf0cddf 100644
--- a/drivers/infiniband/hw/ehca/ehca_classes.h
+++ b/drivers/infiniband/hw/ehca/ehca_classes.h
@@ -163,7 +163,8 @@ struct ehca_mod_qp_parm {
 /* struct for tracking if cqes have been reported to the application */
 struct ehca_qmap_entry {
         u16 app_wr_id;
-        u16 reported;
+        u8 reported;
+        u8 cqe_req;
 };
 
 struct ehca_queue_map {
@@ -171,6 +172,7 @@ struct ehca_queue_map {
         unsigned int entries;
         unsigned int tail;
         unsigned int left_to_poll;
+        unsigned int next_wqe_idx;   /* Idx to first wqe to be flushed */
 };
 
 struct ehca_qp {
diff --git a/drivers/infiniband/hw/ehca/ehca_main.c b/drivers/infiniband/hw/ehca/ehca_main.c
index bb02a86aa526..bec7e0249358 100644
--- a/drivers/infiniband/hw/ehca/ehca_main.c
+++ b/drivers/infiniband/hw/ehca/ehca_main.c
@@ -994,8 +994,7 @@ static int ehca_mem_notifier(struct notifier_block *nb,
                         if (printk_timed_ratelimit(&ehca_dmem_warn_time,
                                                    30 * 1000))
                                 ehca_gen_err("DMEM operations are not allowed"
-                                             "as long as an ehca adapter is"
-                                             "attached to the LPAR");
+                                             "in conjunction with eHCA");
                         return NOTIFY_BAD;
                 }
         }
diff --git a/drivers/infiniband/hw/ehca/ehca_qp.c b/drivers/infiniband/hw/ehca/ehca_qp.c
index 9e05ee2db39b..cadbf0cdd910 100644
--- a/drivers/infiniband/hw/ehca/ehca_qp.c
+++ b/drivers/infiniband/hw/ehca/ehca_qp.c
@@ -435,9 +435,13 @@ static void reset_queue_map(struct ehca_queue_map *qmap)
 {
         int i;
 
-        qmap->tail = 0;
-        for (i = 0; i < qmap->entries; i++)
+        qmap->tail = qmap->entries - 1;
+        qmap->left_to_poll = 0;
+        qmap->next_wqe_idx = 0;
+        for (i = 0; i < qmap->entries; i++) {
                 qmap->map[i].reported = 1;
+                qmap->map[i].cqe_req = 0;
+        }
 }
 
 /*
@@ -1121,6 +1125,7 @@ static int calc_left_cqes(u64 wqe_p, struct ipz_queue *ipz_queue,
         void *wqe_v;
         u64 q_ofs;
         u32 wqe_idx;
+        unsigned int tail_idx;
 
         /* convert real to abs address */
         wqe_p = wqe_p & (~(1UL << 63));
@@ -1133,12 +1138,17 @@ static int calc_left_cqes(u64 wqe_p, struct ipz_queue *ipz_queue,
                 return -EFAULT;
         }
 
+        tail_idx = (qmap->tail + 1) % qmap->entries;
         wqe_idx = q_ofs / ipz_queue->qe_size;
-        if (wqe_idx < qmap->tail)
-                qmap->left_to_poll = (qmap->entries - qmap->tail) + wqe_idx;
-        else
-                qmap->left_to_poll = wqe_idx - qmap->tail;
 
+        /* check all processed wqes, whether a cqe is requested or not */
+        while (tail_idx != wqe_idx) {
+                if (qmap->map[tail_idx].cqe_req)
+                        qmap->left_to_poll++;
+                tail_idx = (tail_idx + 1) % qmap->entries;
+        }
+        /* save index in queue, where we have to start flushing */
+        qmap->next_wqe_idx = wqe_idx;
         return 0;
 }
 
@@ -1185,10 +1195,14 @@ static int check_for_left_cqes(struct ehca_qp *my_qp, struct ehca_shca *shca)
         } else {
                 spin_lock_irqsave(&my_qp->send_cq->spinlock, flags);
                 my_qp->sq_map.left_to_poll = 0;
+                my_qp->sq_map.next_wqe_idx = (my_qp->sq_map.tail + 1) %
+                                                my_qp->sq_map.entries;
                 spin_unlock_irqrestore(&my_qp->send_cq->spinlock, flags);
 
                 spin_lock_irqsave(&my_qp->recv_cq->spinlock, flags);
                 my_qp->rq_map.left_to_poll = 0;
+                my_qp->rq_map.next_wqe_idx = (my_qp->rq_map.tail + 1) %
+                                                my_qp->rq_map.entries;
                 spin_unlock_irqrestore(&my_qp->recv_cq->spinlock, flags);
         }
 
diff --git a/drivers/infiniband/hw/ehca/ehca_reqs.c b/drivers/infiniband/hw/ehca/ehca_reqs.c
index 64928079eafa..00a648f4316c 100644
--- a/drivers/infiniband/hw/ehca/ehca_reqs.c
+++ b/drivers/infiniband/hw/ehca/ehca_reqs.c
@@ -179,6 +179,7 @@ static inline int ehca_write_swqe(struct ehca_qp *qp,
 
         qmap_entry->app_wr_id = get_app_wr_id(send_wr->wr_id);
         qmap_entry->reported = 0;
+        qmap_entry->cqe_req = 0;
 
         switch (send_wr->opcode) {
         case IB_WR_SEND:
@@ -203,8 +204,10 @@ static inline int ehca_write_swqe(struct ehca_qp *qp,
 
         if ((send_wr->send_flags & IB_SEND_SIGNALED ||
             qp->init_attr.sq_sig_type == IB_SIGNAL_ALL_WR)
-            && !hidden)
+            && !hidden) {
                 wqe_p->wr_flag |= WQE_WRFLAG_REQ_SIGNAL_COM;
+                qmap_entry->cqe_req = 1;
+        }
 
         if (send_wr->opcode == IB_WR_SEND_WITH_IMM ||
             send_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) {
@@ -569,6 +572,7 @@ static int internal_post_recv(struct ehca_qp *my_qp,
                 qmap_entry = &my_qp->rq_map.map[rq_map_idx];
                 qmap_entry->app_wr_id = get_app_wr_id(cur_recv_wr->wr_id);
                 qmap_entry->reported = 0;
+                qmap_entry->cqe_req = 1;
 
                 wqe_cnt++;
         } /* eof for cur_recv_wr */
@@ -706,27 +710,34 @@ repoll:
                 goto repoll;
         wc->qp = &my_qp->ib_qp;
 
+        qmap_tail_idx = get_app_wr_id(cqe->work_request_id);
+        if (!(cqe->w_completion_flags & WC_SEND_RECEIVE_BIT))
+                /* We got a send completion. */
+                qmap = &my_qp->sq_map;
+        else
+                /* We got a receive completion. */
+                qmap = &my_qp->rq_map;
+
+        /* advance the tail pointer */
+        qmap->tail = qmap_tail_idx;
+
         if (is_error) {
                 /*
                  * set left_to_poll to 0 because in error state, we will not
                  * get any additional CQEs
                  */
-                ehca_add_to_err_list(my_qp, 1);
+                my_qp->sq_map.next_wqe_idx = (my_qp->sq_map.tail + 1) %
+                                                my_qp->sq_map.entries;
                 my_qp->sq_map.left_to_poll = 0;
+                ehca_add_to_err_list(my_qp, 1);
 
+                my_qp->rq_map.next_wqe_idx = (my_qp->rq_map.tail + 1) %
+                                                my_qp->rq_map.entries;
+                my_qp->rq_map.left_to_poll = 0;
                 if (HAS_RQ(my_qp))
                         ehca_add_to_err_list(my_qp, 0);
-                my_qp->rq_map.left_to_poll = 0;
         }
 
-        qmap_tail_idx = get_app_wr_id(cqe->work_request_id);
-        if (!(cqe->w_completion_flags & WC_SEND_RECEIVE_BIT))
-                /* We got a send completion. */
-                qmap = &my_qp->sq_map;
-        else
-                /* We got a receive completion. */
-                qmap = &my_qp->rq_map;
-
         qmap_entry = &qmap->map[qmap_tail_idx];
         if (qmap_entry->reported) {
                 ehca_warn(cq->device, "Double cqe on qp_num=%#x",
@@ -738,10 +749,6 @@ repoll:
         wc->wr_id = replace_wr_id(cqe->work_request_id, qmap_entry->app_wr_id);
         qmap_entry->reported = 1;
 
-        /* this is a proper completion, we need to advance the tail pointer */
-        if (++qmap->tail == qmap->entries)
-                qmap->tail = 0;
-
         /* if left_to_poll is decremented to 0, add the QP to the error list */
         if (qmap->left_to_poll > 0) {
                 qmap->left_to_poll--;
@@ -805,13 +812,14 @@ static int generate_flush_cqes(struct ehca_qp *my_qp, struct ib_cq *cq,
         else
                 qmap = &my_qp->rq_map;
 
-        qmap_entry = &qmap->map[qmap->tail];
+        qmap_entry = &qmap->map[qmap->next_wqe_idx];
 
         while ((nr < num_entries) && (qmap_entry->reported == 0)) {
                 /* generate flush CQE */
+
                 memset(wc, 0, sizeof(*wc));
 
-                offset = qmap->tail * ipz_queue->qe_size;
+                offset = qmap->next_wqe_idx * ipz_queue->qe_size;
                 wqe = (struct ehca_wqe *)ipz_qeit_calc(ipz_queue, offset);
                 if (!wqe) {
                         ehca_err(cq->device, "Invalid wqe offset=%#lx on "
@@ -850,11 +858,12 @@ static int generate_flush_cqes(struct ehca_qp *my_qp, struct ib_cq *cq,
 
                 wc->qp = &my_qp->ib_qp;
 
-                /* mark as reported and advance tail pointer */
+                /* mark as reported and advance next_wqe pointer */
                 qmap_entry->reported = 1;
-                if (++qmap->tail == qmap->entries)
-                        qmap->tail = 0;
-                qmap_entry = &qmap->map[qmap->tail];
+                qmap->next_wqe_idx++;
+                if (qmap->next_wqe_idx == qmap->entries)
+                        qmap->next_wqe_idx = 0;
+                qmap_entry = &qmap->map[qmap->next_wqe_idx];
 
                 wc++; nr++;
         }
diff --git a/drivers/infiniband/hw/mlx4/cq.c b/drivers/infiniband/hw/mlx4/cq.c
index d0866a3636e2..18308494a195 100644
--- a/drivers/infiniband/hw/mlx4/cq.c
+++ b/drivers/infiniband/hw/mlx4/cq.c
@@ -343,6 +343,7 @@ int mlx4_ib_resize_cq(struct ib_cq *ibcq, int entries, struct ib_udata *udata)
 {
         struct mlx4_ib_dev *dev = to_mdev(ibcq->device);
         struct mlx4_ib_cq *cq = to_mcq(ibcq);
+        struct mlx4_mtt mtt;
         int outst_cqe;
         int err;
 
@@ -376,10 +377,13 @@ int mlx4_ib_resize_cq(struct ib_cq *ibcq, int entries, struct ib_udata *udata)
                         goto out;
         }
 
+        mtt = cq->buf.mtt;
+
         err = mlx4_cq_resize(dev->dev, &cq->mcq, entries, &cq->resize_buf->buf.mtt);
         if (err)
                 goto err_buf;
 
+        mlx4_mtt_cleanup(dev->dev, &mtt);
         if (ibcq->uobject) {
                 cq->buf      = cq->resize_buf->buf;
                 cq->ibcq.cqe = cq->resize_buf->cqe;
@@ -406,6 +410,7 @@ int mlx4_ib_resize_cq(struct ib_cq *ibcq, int entries, struct ib_udata *udata)
         goto out;
 
 err_buf:
+        mlx4_mtt_cleanup(dev->dev, &cq->resize_buf->buf.mtt);
         if (!ibcq->uobject)
                 mlx4_ib_free_cq_buf(dev, &cq->resize_buf->buf,
                                     cq->resize_buf->cqe);
diff --git a/drivers/net/mlx4/main.c b/drivers/net/mlx4/main.c
index 468921b8f4b6..90a0281d15ea 100644
--- a/drivers/net/mlx4/main.c
+++ b/drivers/net/mlx4/main.c
@@ -753,6 +753,7 @@ static int mlx4_setup_hca(struct mlx4_dev *dev)
         struct mlx4_priv *priv = mlx4_priv(dev);
         int err;
         int port;
+        __be32 ib_port_default_caps;
 
         err = mlx4_init_uar_table(dev);
         if (err) {
@@ -852,6 +853,13 @@ static int mlx4_setup_hca(struct mlx4_dev *dev)
         }
 
         for (port = 1; port <= dev->caps.num_ports; port++) {
+                ib_port_default_caps = 0;
+                err = mlx4_get_port_ib_caps(dev, port, &ib_port_default_caps);
+                if (err)
+                        mlx4_warn(dev, "failed to get port %d default "
+                                  "ib capabilities (%d). Continuing with "
+                                  "caps = 0\n", port, err);
+                dev->caps.ib_port_def_cap[port] = ib_port_default_caps;
                 err = mlx4_SET_PORT(dev, port);
                 if (err) {
                         mlx4_err(dev, "Failed to set port %d, aborting\n",
diff --git a/drivers/net/mlx4/mlx4.h b/drivers/net/mlx4/mlx4.h
index 56a2e213fe62..34c909deaff3 100644
--- a/drivers/net/mlx4/mlx4.h
+++ b/drivers/net/mlx4/mlx4.h
@@ -385,5 +385,6 @@ void mlx4_init_mac_table(struct mlx4_dev *dev, struct mlx4_mac_table *table);
 void mlx4_init_vlan_table(struct mlx4_dev *dev, struct mlx4_vlan_table *table);
 
 int mlx4_SET_PORT(struct mlx4_dev *dev, u8 port);
+int mlx4_get_port_ib_caps(struct mlx4_dev *dev, u8 port, __be32 *caps);
 
 #endif /* MLX4_H */
diff --git a/drivers/net/mlx4/port.c b/drivers/net/mlx4/port.c
index e2fdab42c4ce..0a057e5dc63b 100644
--- a/drivers/net/mlx4/port.c
+++ b/drivers/net/mlx4/port.c
@@ -258,6 +258,42 @@ out:
 }
 EXPORT_SYMBOL_GPL(mlx4_unregister_vlan);
 
+int mlx4_get_port_ib_caps(struct mlx4_dev *dev, u8 port, __be32 *caps)
+{
+        struct mlx4_cmd_mailbox *inmailbox, *outmailbox;
+        u8 *inbuf, *outbuf;
+        int err;
+
+        inmailbox = mlx4_alloc_cmd_mailbox(dev);
+        if (IS_ERR(inmailbox))
+                return PTR_ERR(inmailbox);
+
+        outmailbox = mlx4_alloc_cmd_mailbox(dev);
+        if (IS_ERR(outmailbox)) {
+                mlx4_free_cmd_mailbox(dev, inmailbox);
+                return PTR_ERR(outmailbox);
+        }
+
+        inbuf = inmailbox->buf;
+        outbuf = outmailbox->buf;
+        memset(inbuf, 0, 256);
+        memset(outbuf, 0, 256);
+        inbuf[0] = 1;
+        inbuf[1] = 1;
+        inbuf[2] = 1;
+        inbuf[3] = 1;
+        *(__be16 *) (&inbuf[16]) = cpu_to_be16(0x0015);
+        *(__be32 *) (&inbuf[20]) = cpu_to_be32(port);
+
+        err = mlx4_cmd_box(dev, inmailbox->dma, outmailbox->dma, port, 3,
+                           MLX4_CMD_MAD_IFC, MLX4_CMD_TIME_CLASS_C);
+        if (!err)
+                *caps = *(__be32 *) (outbuf + 84);
+        mlx4_free_cmd_mailbox(dev, inmailbox);
+        mlx4_free_cmd_mailbox(dev, outmailbox);
+        return err;
+}
+
 int mlx4_SET_PORT(struct mlx4_dev *dev, u8 port)
 {
         struct mlx4_cmd_mailbox *mailbox;
@@ -273,7 +309,8 @@ int mlx4_SET_PORT(struct mlx4_dev *dev, u8 port)
                 ((u8 *) mailbox->buf)[3] = 6;
                 ((__be16 *) mailbox->buf)[4] = cpu_to_be16(1 << 15);
                 ((__be16 *) mailbox->buf)[6] = cpu_to_be16(1 << 15);
-        }
+        } else
+                ((__be32 *) mailbox->buf)[1] = dev->caps.ib_port_def_cap[port];
         err = mlx4_cmd(dev, mailbox->dma, port, is_eth, MLX4_CMD_SET_PORT,
                        MLX4_CMD_TIME_CLASS_B);