Merge branches 'ehca' and 'mlx4' into for-linus

diff --git a/drivers/infiniband/hw/ehca/ehca_classes.h b/drivers/infiniband/hw/ehca/ehca_classes.h
index 4df887af66a527156a4ad9688e319bb308f36ebc..7fc35cf0cddf35285cd91586e6d1aa02145a6a00 100644 (file)
--- 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 bb02a86aa5269d7b3c22a85aa23d1caaf0411e7e..bec7e0249358f6cb876729d9070c51d94f6e29e7 100644 (file)
--- 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 9e05ee2db39baab87389049d7d2f479e8efe1a6a..cadbf0cdd910e996ddca5029e6a66dcbe27382a9 100644 (file)
--- 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 64928079eafa93bc3a73b13aed73bd6ee57b80bb..00a648f4316c66b0f4585cfbf63db7792fee2c3d 100644 (file)
--- 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++;
        }