IB/ehca: Add driver for IBM eHCA InfiniBand adapters
Add a driver for IBM GX bus InfiniBand adapters, which are usable with
some pSeries/System p systems.
Signed-off-by: Heiko J Schick <schickhj.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
diff --git a/drivers/infiniband/hw/ehca/ipz_pt_fn.c b/drivers/infiniband/hw/ehca/ipz_pt_fn.c
new file mode 100644
index 0000000..e028ff1
--- /dev/null
+++ b/drivers/infiniband/hw/ehca/ipz_pt_fn.c
@@ -0,0 +1,149 @@
+/*
+ * IBM eServer eHCA Infiniband device driver for Linux on POWER
+ *
+ * internal queue handling
+ *
+ * Authors: Waleri Fomin <fomin@de.ibm.com>
+ * Reinhard Ernst <rernst@de.ibm.com>
+ * Christoph Raisch <raisch@de.ibm.com>
+ *
+ * Copyright (c) 2005 IBM Corporation
+ *
+ * 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_tools.h"
+#include "ipz_pt_fn.h"
+
+void *ipz_qpageit_get_inc(struct ipz_queue *queue)
+{
+ void *ret = ipz_qeit_get(queue);
+ queue->current_q_offset += queue->pagesize;
+ if (queue->current_q_offset > queue->queue_length) {
+ queue->current_q_offset -= queue->pagesize;
+ ret = NULL;
+ }
+ if (((u64)ret) % EHCA_PAGESIZE) {
+ ehca_gen_err("ERROR!! not at PAGE-Boundary");
+ return NULL;
+ }
+ return ret;
+}
+
+void *ipz_qeit_eq_get_inc(struct ipz_queue *queue)
+{
+ void *ret = ipz_qeit_get(queue);
+ u64 last_entry_in_q = queue->queue_length - queue->qe_size;
+
+ queue->current_q_offset += queue->qe_size;
+ if (queue->current_q_offset > last_entry_in_q) {
+ queue->current_q_offset = 0;
+ queue->toggle_state = (~queue->toggle_state) & 1;
+ }
+
+ return ret;
+}
+
+int ipz_queue_ctor(struct ipz_queue *queue,
+ const u32 nr_of_pages,
+ const u32 pagesize, const u32 qe_size, const u32 nr_of_sg)
+{
+ int pages_per_kpage = PAGE_SIZE >> EHCA_PAGESHIFT;
+ int f;
+
+ if (pagesize > PAGE_SIZE) {
+ ehca_gen_err("FATAL ERROR: pagesize=%x is greater "
+ "than kernel page size", pagesize);
+ return 0;
+ }
+ if (!pages_per_kpage) {
+ ehca_gen_err("FATAL ERROR: invalid kernel page size. "
+ "pages_per_kpage=%x", pages_per_kpage);
+ return 0;
+ }
+ queue->queue_length = nr_of_pages * pagesize;
+ queue->queue_pages = vmalloc(nr_of_pages * sizeof(void *));
+ if (!queue->queue_pages) {
+ ehca_gen_err("ERROR!! didn't get the memory");
+ return 0;
+ }
+ memset(queue->queue_pages, 0, nr_of_pages * sizeof(void *));
+ /*
+ * allocate pages for queue:
+ * outer loop allocates whole kernel pages (page aligned) and
+ * inner loop divides a kernel page into smaller hca queue pages
+ */
+ f = 0;
+ while (f < nr_of_pages) {
+ u8 *kpage = (u8*)get_zeroed_page(GFP_KERNEL);
+ int k;
+ if (!kpage)
+ goto ipz_queue_ctor_exit0; /*NOMEM*/
+ for (k = 0; k < pages_per_kpage && f < nr_of_pages; k++) {
+ (queue->queue_pages)[f] = (struct ipz_page *)kpage;
+ kpage += EHCA_PAGESIZE;
+ f++;
+ }
+ }
+
+ queue->current_q_offset = 0;
+ queue->qe_size = qe_size;
+ queue->act_nr_of_sg = nr_of_sg;
+ queue->pagesize = pagesize;
+ queue->toggle_state = 1;
+ return 1;
+
+ ipz_queue_ctor_exit0:
+ ehca_gen_err("Couldn't get alloc pages queue=%p f=%x nr_of_pages=%x",
+ queue, f, nr_of_pages);
+ for (f = 0; f < nr_of_pages; f += pages_per_kpage) {
+ if (!(queue->queue_pages)[f])
+ break;
+ free_page((unsigned long)(queue->queue_pages)[f]);
+ }
+ return 0;
+}
+
+int ipz_queue_dtor(struct ipz_queue *queue)
+{
+ int pages_per_kpage = PAGE_SIZE >> EHCA_PAGESHIFT;
+ int g;
+ int nr_pages;
+
+ if (!queue || !queue->queue_pages) {
+ ehca_gen_dbg("queue or queue_pages is NULL");
+ return 0;
+ }
+ nr_pages = queue->queue_length / queue->pagesize;
+ for (g = 0; g < nr_pages; g += pages_per_kpage)
+ free_page((unsigned long)(queue->queue_pages)[g]);
+ vfree(queue->queue_pages);
+
+ return 1;
+}