Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / infiniband / hw / ehca / ehca_pd.c

diff --git a/kernel/drivers/infiniband/hw/ehca/ehca_pd.c b/kernel/drivers/infiniband/hw/ehca/ehca_pd.c
new file mode 100644 (file)
index 0000000..351577a
--- /dev/null
+++ b/kernel/drivers/infiniband/hw/ehca/ehca_pd.c
@@ -0,0 +1,124 @@
+/*
+ *  IBM eServer eHCA Infiniband device driver for Linux on POWER
+ *
+ *  PD functions
+ *
+ *  Authors: Christoph Raisch <raisch@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 <linux/slab.h>
+
+#include "ehca_tools.h"
+#include "ehca_iverbs.h"
+
+static struct kmem_cache *pd_cache;
+
+struct ib_pd *ehca_alloc_pd(struct ib_device *device,
+                           struct ib_ucontext *context, struct ib_udata *udata)
+{
+       struct ehca_pd *pd;
+       int i;
+
+       pd = kmem_cache_zalloc(pd_cache, GFP_KERNEL);
+       if (!pd) {
+               ehca_err(device, "device=%p context=%p out of memory",
+                        device, context);
+               return ERR_PTR(-ENOMEM);
+       }
+
+       for (i = 0; i < 2; i++) {
+               INIT_LIST_HEAD(&pd->free[i]);
+               INIT_LIST_HEAD(&pd->full[i]);
+       }
+       mutex_init(&pd->lock);
+
+       /*
+        * Kernel PD: when device = -1, 0
+        * User   PD: when context != -1
+        */
+       if (!context) {
+               /*
+                * Kernel PDs after init reuses always
+                * the one created in ehca_shca_reopen()
+                */
+               struct ehca_shca *shca = container_of(device, struct ehca_shca,
+                                                     ib_device);
+               pd->fw_pd.value = shca->pd->fw_pd.value;
+       } else
+               pd->fw_pd.value = (u64)pd;
+
+       return &pd->ib_pd;
+}
+
+int ehca_dealloc_pd(struct ib_pd *pd)
+{
+       struct ehca_pd *my_pd = container_of(pd, struct ehca_pd, ib_pd);
+       int i, leftovers = 0;
+       struct ipz_small_queue_page *page, *tmp;
+
+       for (i = 0; i < 2; i++) {
+               list_splice(&my_pd->full[i], &my_pd->free[i]);
+               list_for_each_entry_safe(page, tmp, &my_pd->free[i], list) {
+                       leftovers = 1;
+                       free_page(page->page);
+                       kmem_cache_free(small_qp_cache, page);
+               }
+       }
+
+       if (leftovers)
+               ehca_warn(pd->device,
+                         "Some small queue pages were not freed");
+
+       kmem_cache_free(pd_cache, my_pd);
+
+       return 0;
+}
+
+int ehca_init_pd_cache(void)
+{
+       pd_cache = kmem_cache_create("ehca_cache_pd",
+                                    sizeof(struct ehca_pd), 0,
+                                    SLAB_HWCACHE_ALIGN,
+                                    NULL);
+       if (!pd_cache)
+               return -ENOMEM;
+       return 0;
+}
+
+void ehca_cleanup_pd_cache(void)
+{
+       if (pd_cache)
+               kmem_cache_destroy(pd_cache);
+}