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authorYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 12:17:53 -0700
committerYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 15:44:42 -0700
commit9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch)
tree1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/drivers/infiniband/hw/ehca/ehca_eq.c
parent98260f3884f4a202f9ca5eabed40b1354c489b29 (diff)
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/drivers/infiniband/hw/ehca/ehca_eq.c')
-rw-r--r--kernel/drivers/infiniband/hw/ehca/ehca_eq.c189
1 files changed, 189 insertions, 0 deletions
diff --git a/kernel/drivers/infiniband/hw/ehca/ehca_eq.c b/kernel/drivers/infiniband/hw/ehca/ehca_eq.c
new file mode 100644
index 000000000..90da6747d
--- /dev/null
+++ b/kernel/drivers/infiniband/hw/ehca/ehca_eq.c
@@ -0,0 +1,189 @@
+/*
+ * 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)
+{
+ int ret;
+ u64 h_ret;
+ u32 nr_pages;
+ u32 i;
+ void *vpage;
+ struct ib_device *ib_dev = &shca->ib_device;
+
+ spin_lock_init(&eq->spinlock);
+ spin_lock_init(&eq->irq_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;
+ }
+
+ h_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 (h_ret != H_SUCCESS) {
+ ehca_err(ib_dev, "Can't allocate EQ/NEQ. eq=%p", eq);
+ return -EINVAL;
+ }
+
+ ret = ipz_queue_ctor(NULL, &eq->ipz_queue, nr_pages,
+ EHCA_PAGESIZE, sizeof(struct ehca_eqe), 0, 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;
+
+ vpage = ipz_qpageit_get_inc(&eq->ipz_queue);
+ if (!vpage)
+ goto create_eq_exit2;
+
+ rpage = __pa(vpage);
+ h_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 (h_ret != H_SUCCESS || vpage)
+ goto create_eq_exit2;
+ } else {
+ if (h_ret != H_PAGE_REGISTERED)
+ goto create_eq_exit2;
+ }
+ }
+
+ ipz_qeit_reset(&eq->ipz_queue);
+
+ /* register interrupt handlers and initialize work queues */
+ if (type == EHCA_EQ) {
+ tasklet_init(&eq->interrupt_task, ehca_tasklet_eq, (long)shca);
+
+ ret = ibmebus_request_irq(eq->ist, ehca_interrupt_eq,
+ 0, "ehca_eq",
+ (void *)shca);
+ if (ret < 0)
+ ehca_err(ib_dev, "Can't map interrupt handler.");
+ } else if (type == EHCA_NEQ) {
+ tasklet_init(&eq->interrupt_task, ehca_tasklet_neq, (long)shca);
+
+ ret = ibmebus_request_irq(eq->ist, ehca_interrupt_neq,
+ 0, "ehca_neq",
+ (void *)shca);
+ if (ret < 0)
+ ehca_err(ib_dev, "Can't map interrupt handler.");
+ }
+
+ eq->is_initialized = 1;
+
+ return 0;
+
+create_eq_exit2:
+ ipz_queue_dtor(NULL, &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;
+
+ ibmebus_free_irq(eq->ist, (void *)shca);
+
+ spin_lock_irqsave(&shca_list_lock, flags);
+ eq->is_initialized = 0;
+ spin_unlock_irqrestore(&shca_list_lock, flags);
+
+ tasklet_kill(&eq->interrupt_task);
+
+ h_ret = hipz_h_destroy_eq(shca->ipz_hca_handle, eq);
+
+ if (h_ret != H_SUCCESS) {
+ ehca_err(&shca->ib_device, "Can't free EQ resources.");
+ return -EINVAL;
+ }
+ ipz_queue_dtor(NULL, &eq->ipz_queue);
+
+ return 0;
+}