--- /dev/null
+/*
+ * IBM eServer eHCA Infiniband device driver for Linux on POWER
+ *
+ * Event queue handling
+ *
+ * Authors: Waleri Fomin <fomin@de.ibm.com>
+ * Khadija Souissi <souissi@de.ibm.com>
+ * Reinhard Ernst <rernst@de.ibm.com>
+ * Heiko J Schick <schickhj@de.ibm.com>
+ * Hoang-Nam Nguyen <hnguyen@de.ibm.com>
+ *
+ *
+ * Copyright (c) 2005 IBM Corporation
+ *
+ * All rights reserved.
+ *
+ * This source code is distributed under a dual license of GPL v2.0 and OpenIB
+ * BSD.
+ *
+ * OpenIB BSD License
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials
+ * provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
+ * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "ehca_classes.h"
+#include "ehca_irq.h"
+#include "ehca_iverbs.h"
+#include "ehca_qes.h"
+#include "hcp_if.h"
+#include "ipz_pt_fn.h"
+
+int ehca_create_eq(struct ehca_shca *shca,
+ struct ehca_eq *eq,
+ const enum ehca_eq_type type, const u32 length)
+{
+ u64 ret;
+ u32 nr_pages;
+ u32 i;
+ void *vpage;
+ struct ib_device *ib_dev = &shca->ib_device;
+
+ spin_lock_init(&eq->spinlock);
+ eq->is_initialized = 0;
+
+ if (type != EHCA_EQ && type != EHCA_NEQ) {
+ ehca_err(ib_dev, "Invalid EQ type %x. eq=%p", type, eq);
+ return -EINVAL;
+ }
+ if (!length) {
+ ehca_err(ib_dev, "EQ length must not be zero. eq=%p", eq);
+ return -EINVAL;
+ }
+
+ ret = hipz_h_alloc_resource_eq(shca->ipz_hca_handle,
+ &eq->pf,
+ type,
+ length,
+ &eq->ipz_eq_handle,
+ &eq->length,
+ &nr_pages, &eq->ist);
+
+ if (ret != H_SUCCESS) {
+ ehca_err(ib_dev, "Can't allocate EQ/NEQ. eq=%p", eq);
+ return -EINVAL;
+ }
+
+ ret = ipz_queue_ctor(&eq->ipz_queue, nr_pages,
+ EHCA_PAGESIZE, sizeof(struct ehca_eqe), 0);
+ if (!ret) {
+ ehca_err(ib_dev, "Can't allocate EQ pages eq=%p", eq);
+ goto create_eq_exit1;
+ }
+
+ for (i = 0; i < nr_pages; i++) {
+ u64 rpage;
+
+ if (!(vpage = ipz_qpageit_get_inc(&eq->ipz_queue))) {
+ ret = H_RESOURCE;
+ goto create_eq_exit2;
+ }
+
+ rpage = virt_to_abs(vpage);
+ ret = hipz_h_register_rpage_eq(shca->ipz_hca_handle,
+ eq->ipz_eq_handle,
+ &eq->pf,
+ 0, 0, rpage, 1);
+
+ if (i == (nr_pages - 1)) {
+ /* last page */
+ vpage = ipz_qpageit_get_inc(&eq->ipz_queue);
+ if (ret != H_SUCCESS || vpage)
+ goto create_eq_exit2;
+ } else {
+ if (ret != H_PAGE_REGISTERED || !vpage)
+ goto create_eq_exit2;
+ }
+ }
+
+ ipz_qeit_reset(&eq->ipz_queue);
+
+ /* register interrupt handlers and initialize work queues */
+ if (type == EHCA_EQ) {
+ ret = ibmebus_request_irq(NULL, eq->ist, ehca_interrupt_eq,
+ SA_INTERRUPT, "ehca_eq",
+ (void *)shca);
+ if (ret < 0)
+ ehca_err(ib_dev, "Can't map interrupt handler.");
+
+ tasklet_init(&eq->interrupt_task, ehca_tasklet_eq, (long)shca);
+ } else if (type == EHCA_NEQ) {
+ ret = ibmebus_request_irq(NULL, eq->ist, ehca_interrupt_neq,
+ SA_INTERRUPT, "ehca_neq",
+ (void *)shca);
+ if (ret < 0)
+ ehca_err(ib_dev, "Can't map interrupt handler.");
+
+ tasklet_init(&eq->interrupt_task, ehca_tasklet_neq, (long)shca);
+ }
+
+ eq->is_initialized = 1;
+
+ return 0;
+
+create_eq_exit2:
+ ipz_queue_dtor(&eq->ipz_queue);
+
+create_eq_exit1:
+ hipz_h_destroy_eq(shca->ipz_hca_handle, eq);
+
+ return -EINVAL;
+}
+
+void *ehca_poll_eq(struct ehca_shca *shca, struct ehca_eq *eq)
+{
+ unsigned long flags;
+ void *eqe;
+
+ spin_lock_irqsave(&eq->spinlock, flags);
+ eqe = ipz_eqit_eq_get_inc_valid(&eq->ipz_queue);
+ spin_unlock_irqrestore(&eq->spinlock, flags);
+
+ return eqe;
+}
+
+int ehca_destroy_eq(struct ehca_shca *shca, struct ehca_eq *eq)
+{
+ unsigned long flags;
+ u64 h_ret;
+
+ spin_lock_irqsave(&eq->spinlock, flags);
+ ibmebus_free_irq(NULL, eq->ist, (void *)shca);
+
+ h_ret = hipz_h_destroy_eq(shca->ipz_hca_handle, eq);
+
+ spin_unlock_irqrestore(&eq->spinlock, flags);
+
+ if (h_ret != H_SUCCESS) {
+ ehca_err(&shca->ib_device, "Can't free EQ resources.");
+ return -EINVAL;
+ }
+ ipz_queue_dtor(&eq->ipz_queue);
+
+ return 0;
+}
git://git.onelab.eu / linux-2.6.git / blobdiff