queue->is_small = (queue->page_size != 0);
}
+/* needs to be called with cq->spinlock held */
+void ehca_add_to_err_list(struct ehca_qp *qp, int on_sq)
+{
+ struct list_head *list, *node;
+
+ /* TODO: support low latency QPs */
+ if (qp->ext_type == EQPT_LLQP)
+ return;
+
+ if (on_sq) {
+ list = &qp->send_cq->sqp_err_list;
+ node = &qp->sq_err_node;
+ } else {
+ list = &qp->recv_cq->rqp_err_list;
+ node = &qp->rq_err_node;
+ }
+
+ if (list_empty(node))
+ list_add_tail(node, list);
+
+ return;
+}
+
+static void del_from_err_list(struct ehca_cq *cq, struct list_head *node)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&cq->spinlock, flags);
+
+ if (!list_empty(node))
+ list_del_init(node);
+
+ spin_unlock_irqrestore(&cq->spinlock, flags);
+}
+
+static void reset_queue_map(struct ehca_queue_map *qmap)
+{
+ int i;
+
+ qmap->tail = 0;
+ for (i = 0; i < qmap->entries; i++)
+ qmap->map[i].reported = 1;
+}
+
/*
* Create an ib_qp struct that is either a QP or an SRQ, depending on
* the value of the is_srq parameter. If init_attr and srq_init_attr share
struct ib_srq_init_attr *srq_init_attr,
struct ib_udata *udata, int is_srq)
{
- struct ehca_qp *my_qp;
+ struct ehca_qp *my_qp, *my_srq = NULL;
struct ehca_pd *my_pd = container_of(pd, struct ehca_pd, ib_pd);
struct ehca_shca *shca = container_of(pd->device, struct ehca_shca,
ib_device);
struct ib_ucontext *context = NULL;
- u32 nr_qes;
u64 h_ret;
int is_llqp = 0, has_srq = 0;
int qp_type, max_send_sge, max_recv_sge, ret;
u32 swqe_size = 0, rwqe_size = 0, ib_qp_num;
unsigned long flags;
- if (!atomic_add_unless(&shca->num_qps, 1, ehca_max_qp)) {
+ if (!atomic_add_unless(&shca->num_qps, 1, shca->max_num_qps)) {
ehca_err(pd->device, "Unable to create QP, max number of %i "
- "QPs reached.", ehca_max_qp);
+ "QPs reached.", shca->max_num_qps);
ehca_err(pd->device, "To increase the maximum number of QPs "
"use the number_of_qps module parameter.\n");
return ERR_PTR(-ENOSPC);
/* handle SRQ base QPs */
if (init_attr->srq) {
- struct ehca_qp *my_srq =
- container_of(init_attr->srq, struct ehca_qp, ib_srq);
+ my_srq = container_of(init_attr->srq, struct ehca_qp, ib_srq);
+
+ if (qp_type == IB_QPT_UC) {
+ ehca_err(pd->device, "UC with SRQ not supported");
+ atomic_dec(&shca->num_qps);
+ return ERR_PTR(-EINVAL);
+ }
has_srq = 1;
parms.ext_type = EQPT_SRQBASE;
"and pages ret=%i", ret);
goto create_qp_exit2;
}
- nr_qes = my_qp->ipz_squeue.queue_length /
+
+ my_qp->sq_map.entries = my_qp->ipz_squeue.queue_length /
my_qp->ipz_squeue.qe_size;
- my_qp->sq_map = vmalloc(nr_qes *
+ my_qp->sq_map.map = vmalloc(my_qp->sq_map.entries *
sizeof(struct ehca_qmap_entry));
- if (!my_qp->sq_map) {
+ if (!my_qp->sq_map.map) {
ehca_err(pd->device, "Couldn't allocate squeue "
"map ret=%i", ret);
goto create_qp_exit3;
}
+ INIT_LIST_HEAD(&my_qp->sq_err_node);
+ /* to avoid the generation of bogus flush CQEs */
+ reset_queue_map(&my_qp->sq_map);
}
if (HAS_RQ(my_qp)) {
"and pages ret=%i", ret);
goto create_qp_exit4;
}
+
+ my_qp->rq_map.entries = my_qp->ipz_rqueue.queue_length /
+ my_qp->ipz_rqueue.qe_size;
+ my_qp->rq_map.map = vmalloc(my_qp->rq_map.entries *
+ sizeof(struct ehca_qmap_entry));
+ if (!my_qp->rq_map.map) {
+ ehca_err(pd->device, "Couldn't allocate squeue "
+ "map ret=%i", ret);
+ goto create_qp_exit5;
+ }
+ INIT_LIST_HEAD(&my_qp->rq_err_node);
+ /* to avoid the generation of bogus flush CQEs */
+ reset_queue_map(&my_qp->rq_map);
+ } else if (init_attr->srq) {
+ /* this is a base QP, use the queue map of the SRQ */
+ my_qp->rq_map = my_srq->rq_map;
+ INIT_LIST_HEAD(&my_qp->rq_err_node);
+
+ my_qp->ipz_rqueue = my_srq->ipz_rqueue;
}
if (is_srq) {
if (ret) {
ehca_err(pd->device,
"Couldn't assign qp to send_cq ret=%i", ret);
- goto create_qp_exit6;
+ goto create_qp_exit7;
}
}
if (ib_copy_to_udata(udata, &resp, sizeof resp)) {
ehca_err(pd->device, "Copy to udata failed");
ret = -EINVAL;
- goto create_qp_exit7;
+ goto create_qp_exit8;
}
}
return my_qp;
-create_qp_exit7:
+create_qp_exit8:
ehca_cq_unassign_qp(my_qp->send_cq, my_qp->real_qp_num);
-create_qp_exit6:
+create_qp_exit7:
kfree(my_qp->mod_qp_parm);
+create_qp_exit6:
+ if (HAS_RQ(my_qp))
+ vfree(my_qp->rq_map.map);
+
create_qp_exit5:
if (HAS_RQ(my_qp))
ipz_queue_dtor(my_pd, &my_qp->ipz_rqueue);
create_qp_exit4:
if (HAS_SQ(my_qp))
- vfree(my_qp->sq_map);
+ vfree(my_qp->sq_map.map);
create_qp_exit3:
if (HAS_SQ(my_qp))
return 0;
}
+static int calc_left_cqes(u64 wqe_p, struct ipz_queue *ipz_queue,
+ struct ehca_queue_map *qmap)
+{
+ void *wqe_v;
+ u64 q_ofs;
+ u32 wqe_idx;
+
+ /* convert real to abs address */
+ wqe_p = wqe_p & (~(1UL << 63));
+
+ wqe_v = abs_to_virt(wqe_p);
+
+ if (ipz_queue_abs_to_offset(ipz_queue, wqe_p, &q_ofs)) {
+ ehca_gen_err("Invalid offset for calculating left cqes "
+ "wqe_p=%#lx wqe_v=%p\n", wqe_p, wqe_v);
+ return -EFAULT;
+ }
+
+ 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;
+
+ return 0;
+}
+
+static int check_for_left_cqes(struct ehca_qp *my_qp, struct ehca_shca *shca)
+{
+ u64 h_ret;
+ void *send_wqe_p, *recv_wqe_p;
+ int ret;
+ unsigned long flags;
+ int qp_num = my_qp->ib_qp.qp_num;
+
+ /* this hcall is not supported on base QPs */
+ if (my_qp->ext_type != EQPT_SRQBASE) {
+ /* get send and receive wqe pointer */
+ h_ret = hipz_h_disable_and_get_wqe(shca->ipz_hca_handle,
+ my_qp->ipz_qp_handle, &my_qp->pf,
+ &send_wqe_p, &recv_wqe_p, 4);
+ if (h_ret != H_SUCCESS) {
+ ehca_err(&shca->ib_device, "disable_and_get_wqe() "
+ "failed ehca_qp=%p qp_num=%x h_ret=%li",
+ my_qp, qp_num, h_ret);
+ return ehca2ib_return_code(h_ret);
+ }
+
+ /*
+ * acquire lock to ensure that nobody is polling the cq which
+ * could mean that the qmap->tail pointer is in an
+ * inconsistent state.
+ */
+ spin_lock_irqsave(&my_qp->send_cq->spinlock, flags);
+ ret = calc_left_cqes((u64)send_wqe_p, &my_qp->ipz_squeue,
+ &my_qp->sq_map);
+ spin_unlock_irqrestore(&my_qp->send_cq->spinlock, flags);
+ if (ret)
+ return ret;
+
+
+ spin_lock_irqsave(&my_qp->recv_cq->spinlock, flags);
+ ret = calc_left_cqes((u64)recv_wqe_p, &my_qp->ipz_rqueue,
+ &my_qp->rq_map);
+ spin_unlock_irqrestore(&my_qp->recv_cq->spinlock, flags);
+ if (ret)
+ return ret;
+ } else {
+ spin_lock_irqsave(&my_qp->send_cq->spinlock, flags);
+ my_qp->sq_map.left_to_poll = 0;
+ 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;
+ spin_unlock_irqrestore(&my_qp->recv_cq->spinlock, flags);
+ }
+
+ /* this assures flush cqes being generated only for pending wqes */
+ if ((my_qp->sq_map.left_to_poll == 0) &&
+ (my_qp->rq_map.left_to_poll == 0)) {
+ spin_lock_irqsave(&my_qp->send_cq->spinlock, flags);
+ ehca_add_to_err_list(my_qp, 1);
+ spin_unlock_irqrestore(&my_qp->send_cq->spinlock, flags);
+
+ if (HAS_RQ(my_qp)) {
+ spin_lock_irqsave(&my_qp->recv_cq->spinlock, flags);
+ ehca_add_to_err_list(my_qp, 0);
+ spin_unlock_irqrestore(&my_qp->recv_cq->spinlock,
+ flags);
+ }
+ }
+
+ return 0;
+}
+
/*
* internal_modify_qp with circumvention to handle aqp0 properly
* smi_reset2init indicates if this is an internal reset-to-init-call for
goto modify_qp_exit2;
}
}
+ if ((qp_new_state == IB_QPS_ERR) && (qp_cur_state != IB_QPS_ERR)) {
+ ret = check_for_left_cqes(my_qp, shca);
+ if (ret)
+ goto modify_qp_exit2;
+ }
if (statetrans == IB_QPST_ANY2RESET) {
ipz_qeit_reset(&my_qp->ipz_rqueue);
ipz_qeit_reset(&my_qp->ipz_squeue);
+
+ if (qp_cur_state == IB_QPS_ERR) {
+ del_from_err_list(my_qp->send_cq, &my_qp->sq_err_node);
+
+ if (HAS_RQ(my_qp))
+ del_from_err_list(my_qp->recv_cq,
+ &my_qp->rq_err_node);
+ }
+ reset_queue_map(&my_qp->sq_map);
+
+ if (HAS_RQ(my_qp))
+ reset_queue_map(&my_qp->rq_map);
}
if (attr_mask & IB_QP_QKEY)
idr_remove(&ehca_qp_idr, my_qp->token);
write_unlock_irqrestore(&ehca_qp_idr_lock, flags);
+ /*
+ * SRQs will never get into an error list and do not have a recv_cq,
+ * so we need to skip them here.
+ */
+ if (HAS_RQ(my_qp) && !IS_SRQ(my_qp))
+ del_from_err_list(my_qp->recv_cq, &my_qp->rq_err_node);
+
+ if (HAS_SQ(my_qp))
+ del_from_err_list(my_qp->send_cq, &my_qp->sq_err_node);
+
/* now wait until all pending events have completed */
wait_event(my_qp->wait_completion, !atomic_read(&my_qp->nr_events));
if (qp_type == IB_QPT_GSI) {
struct ib_event event;
ehca_info(dev, "device %s: port %x is inactive.",
- shca->ib_device.name, port_num);
+ shca->ib_device.name, port_num);
event.device = &shca->ib_device;
event.event = IB_EVENT_PORT_ERR;
event.element.port_num = port_num;
ib_dispatch_event(&event);
}
- if (HAS_RQ(my_qp))
+ if (HAS_RQ(my_qp)) {
ipz_queue_dtor(my_pd, &my_qp->ipz_rqueue);
+
+ vfree(my_qp->rq_map.map);
+ }
if (HAS_SQ(my_qp)) {
ipz_queue_dtor(my_pd, &my_qp->ipz_squeue);
- vfree(my_qp->sq_map);
+
+ vfree(my_qp->sq_map.map);
}
kmem_cache_free(qp_cache, my_qp);
atomic_dec(&shca->num_qps);
projects / linux-2.6-omap-h63xx.git / blobdiff