From: Mike Marciniszyn <mike.marciniszyn-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
To: dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org
Cc: linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: [PATCH v2 26/49] IB/hfi1: add user/kernel memory sharing hooks
Date: Mon, 15 Jun 2015 09:28:18 -0400 [thread overview]
Message-ID: <20150615132818.29741.95358.stgit@phlsvslse11.ph.intel.com> (raw)
In-Reply-To: <20150615132434.29741.35258.stgit-K+u1se/DcYrLESAwzcoQNrvm/XP+8Wra@public.gmane.org>
Signed-off-by: Andrew Friedley <andrew.friedley-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Arthur Kepner <arthur.kepner-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Brendan Cunningham <brendan.cunningham-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Brian Welty <brian.welty-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Caz Yokoyama <caz.yokoyama-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Dean Luick <dean.luick-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Easwar Hariharan <easwar.hariharan-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Harish Chegondi <harish.chegondi-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Ira Weiny <ira.weiny-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Jim Snow <jim.m.snow-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: John Gregor <john.a.gregor-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Jubin John <jubin.john-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Kaike Wan <kaike.wan-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Kevin Pine <kevin.pine-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Kyle Liddell <kyle.liddell-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Mitko Haralanov <mitko.haralanov-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Ravi Krishnaswamy <ravi.krishnaswamy-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Sadanand Warrier <sadanand.warrier-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Sanath Kumar <sanath.s.kumar-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Sudeep Dutt <sudeep.dutt-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Vlad Danushevsky <vladimir.danusevsky-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
---
drivers/infiniband/hw/hfi1/mmap.c | 192 +++++++++++++++++++++++++++++++++++++
1 file changed, 192 insertions(+)
create mode 100644 drivers/infiniband/hw/hfi1/mmap.c
diff --git a/drivers/infiniband/hw/hfi1/mmap.c b/drivers/infiniband/hw/hfi1/mmap.c
new file mode 100644
index 0000000..5173b1c
--- /dev/null
+++ b/drivers/infiniband/hw/hfi1/mmap.c
@@ -0,0 +1,192 @@
+/*
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Intel Corporation.
+ *
+ * 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.
+ * - Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * 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/module.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+#include <linux/mm.h>
+#include <linux/errno.h>
+#include <asm/pgtable.h>
+
+#include "verbs.h"
+
+/**
+ * hfi1_release_mmap_info - free mmap info structure
+ * @ref: a pointer to the kref within struct hfi1_mmap_info
+ */
+void hfi1_release_mmap_info(struct kref *ref)
+{
+ struct hfi1_mmap_info *ip =
+ container_of(ref, struct hfi1_mmap_info, ref);
+ struct hfi1_ibdev *dev = to_idev(ip->context->device);
+
+ spin_lock_irq(&dev->pending_lock);
+ list_del(&ip->pending_mmaps);
+ spin_unlock_irq(&dev->pending_lock);
+
+ vfree(ip->obj);
+ kfree(ip);
+}
+
+/*
+ * open and close keep track of how many times the CQ is mapped,
+ * to avoid releasing it.
+ */
+static void hfi1_vma_open(struct vm_area_struct *vma)
+{
+ struct hfi1_mmap_info *ip = vma->vm_private_data;
+
+ kref_get(&ip->ref);
+}
+
+static void hfi1_vma_close(struct vm_area_struct *vma)
+{
+ struct hfi1_mmap_info *ip = vma->vm_private_data;
+
+ kref_put(&ip->ref, hfi1_release_mmap_info);
+}
+
+static struct vm_operations_struct hfi1_vm_ops = {
+ .open = hfi1_vma_open,
+ .close = hfi1_vma_close,
+};
+
+/**
+ * hfi1_mmap - create a new mmap region
+ * @context: the IB user context of the process making the mmap() call
+ * @vma: the VMA to be initialized
+ * Return zero if the mmap is OK. Otherwise, return an errno.
+ */
+int hfi1_mmap(struct ib_ucontext *context, struct vm_area_struct *vma)
+{
+ struct hfi1_ibdev *dev = to_idev(context->device);
+ unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
+ unsigned long size = vma->vm_end - vma->vm_start;
+ struct hfi1_mmap_info *ip, *pp;
+ int ret = -EINVAL;
+
+ /*
+ * Search the device's list of objects waiting for a mmap call.
+ * Normally, this list is very short since a call to create a
+ * CQ, QP, or SRQ is soon followed by a call to mmap().
+ */
+ spin_lock_irq(&dev->pending_lock);
+ list_for_each_entry_safe(ip, pp, &dev->pending_mmaps,
+ pending_mmaps) {
+ /* Only the creator is allowed to mmap the object */
+ if (context != ip->context || (__u64) offset != ip->offset)
+ continue;
+ /* Don't allow a mmap larger than the object. */
+ if (size > ip->size)
+ break;
+
+ list_del_init(&ip->pending_mmaps);
+ spin_unlock_irq(&dev->pending_lock);
+
+ ret = remap_vmalloc_range(vma, ip->obj, 0);
+ if (ret)
+ goto done;
+ vma->vm_ops = &hfi1_vm_ops;
+ vma->vm_private_data = ip;
+ hfi1_vma_open(vma);
+ goto done;
+ }
+ spin_unlock_irq(&dev->pending_lock);
+done:
+ return ret;
+}
+
+/*
+ * Allocate information for hfi1_mmap
+ */
+struct hfi1_mmap_info *hfi1_create_mmap_info(struct hfi1_ibdev *dev,
+ u32 size,
+ struct ib_ucontext *context,
+ void *obj) {
+ struct hfi1_mmap_info *ip;
+
+ ip = kmalloc(sizeof(*ip), GFP_KERNEL);
+ if (!ip)
+ goto bail;
+
+ size = PAGE_ALIGN(size);
+
+ spin_lock_irq(&dev->mmap_offset_lock);
+ if (dev->mmap_offset == 0)
+ dev->mmap_offset = PAGE_SIZE;
+ ip->offset = dev->mmap_offset;
+ dev->mmap_offset += size;
+ spin_unlock_irq(&dev->mmap_offset_lock);
+
+ INIT_LIST_HEAD(&ip->pending_mmaps);
+ ip->size = size;
+ ip->context = context;
+ ip->obj = obj;
+ kref_init(&ip->ref);
+
+bail:
+ return ip;
+}
+
+void hfi1_update_mmap_info(struct hfi1_ibdev *dev, struct hfi1_mmap_info *ip,
+ u32 size, void *obj)
+{
+ size = PAGE_ALIGN(size);
+
+ spin_lock_irq(&dev->mmap_offset_lock);
+ if (dev->mmap_offset == 0)
+ dev->mmap_offset = PAGE_SIZE;
+ ip->offset = dev->mmap_offset;
+ dev->mmap_offset += size;
+ spin_unlock_irq(&dev->mmap_offset_lock);
+
+ ip->size = size;
+ ip->obj = obj;
+}
--
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next prev parent reply other threads:[~2015-06-15 13:28 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-15 13:25 [PATCH v2 00/49] Add OPA gen1 driver Mike Marciniszyn
[not found] ` <20150615132434.29741.35258.stgit-K+u1se/DcYrLESAwzcoQNrvm/XP+8Wra@public.gmane.org>
2015-06-15 13:26 ` [PATCH v2 01/49] IB/core: Add OPA Port header definitions Mike Marciniszyn
[not found] ` <20150615132603.29741.75037.stgit-K+u1se/DcYrLESAwzcoQNrvm/XP+8Wra@public.gmane.org>
2015-06-15 17:11 ` Hefty, Sean
[not found] ` <1828884A29C6694DAF28B7E6B8A82373A8FF5771-P5GAC/sN6hkd3b2yrw5b5LfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2015-06-17 12:08 ` Marciniszyn, Mike
[not found] ` <32E1700B9017364D9B60AED9960492BC2575145F-RjuIdWtd+YbTXloPLtfHfbfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2015-06-17 12:12 ` Hal Rosenstock
[not found] ` <55816432.906-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
2015-06-17 15:32 ` Hefty, Sean
2015-06-15 13:26 ` [PATCH v2 02/49] IB/hfi1: add chip specific support part1 Mike Marciniszyn
2015-06-15 13:26 ` [PATCH v2 03/49] IB/hfi1: add chip specific support part2 Mike Marciniszyn
2015-06-15 13:26 ` [PATCH v2 04/49] IB/hfi1: add chip specific support part3 Mike Marciniszyn
2015-06-15 13:26 ` [PATCH v2 05/49] IB/hfi1: add chip specific support part4 Mike Marciniszyn
2015-06-15 13:26 ` [PATCH v2 06/49] IB/hfi1: add chip register definitions Mike Marciniszyn
2015-06-15 13:26 ` [PATCH v2 07/49] IB/hfi1: add chip specific headers Mike Marciniszyn
2015-06-15 13:26 ` [PATCH v2 08/49] IB/hfi1: add common header file definitions Mike Marciniszyn
2015-06-15 13:26 ` [PATCH v2 09/49] IB/hfi1: add completion queue processing Mike Marciniszyn
2015-06-15 13:26 ` [PATCH v2 10/49] IB/hfi1: add debugfs handling Mike Marciniszyn
2015-06-15 13:26 ` [PATCH v2 11/49] IB/hfi1: add char device instantiation code Mike Marciniszyn
2015-06-15 13:27 ` [PATCH v2 12/49] IB/hfi1: add diagnostic hooks Mike Marciniszyn
2015-06-15 13:27 ` [PATCH v2 13/49] IB/hfi1: add dma operation hooks Mike Marciniszyn
2015-06-15 13:27 ` [PATCH v2 14/49] IB/hfi1: add low lower receive functions Mike Marciniszyn
2015-06-15 13:27 ` [PATCH v2 15/49] IB/hfi1: add eeprom hooks Mike Marciniszyn
2015-06-15 13:27 ` [PATCH v2 16/49] IB/hfi1: add PSM driver control/data path Mike Marciniszyn
2015-06-15 13:27 ` [PATCH v2 17/49] IB/hfi1: add firmware hooks Mike Marciniszyn
2015-06-15 13:27 ` [PATCH v2 18/49] IB/hfi1: add general hfi header file Mike Marciniszyn
2015-06-15 13:27 ` [PATCH v2 19/49] IB/hfi1: add module init hooks Mike Marciniszyn
2015-06-15 13:27 ` [PATCH v2 20/49] IB/hfi1: add interrupt hooks Mike Marciniszyn
2015-06-15 13:27 ` [PATCH v2 21/49] IB/hfi1: add progress delay/restart hooks Mike Marciniszyn
2015-06-15 13:27 ` [PATCH v2 22/49] IB/hfi1: add rkey/lkey validation Mike Marciniszyn
2015-06-15 13:28 ` [PATCH v2 23/49] IB/hfi1: add OPA mad handling part1 Mike Marciniszyn
2015-06-15 13:28 ` [PATCH v2 24/49] IB/hfi1: add OPA mad handling part2 Mike Marciniszyn
2015-06-15 13:28 ` [PATCH v2 25/49] IB/hfi1: add local mad header Mike Marciniszyn
[not found] ` <20150615132813.29741.3528.stgit-K+u1se/DcYrLESAwzcoQNrvm/XP+8Wra@public.gmane.org>
2015-06-15 23:27 ` Hefty, Sean
[not found] ` <1828884A29C6694DAF28B7E6B8A82373A8FF5B18-P5GAC/sN6hkd3b2yrw5b5LfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2015-06-17 11:51 ` Marciniszyn, Mike
2015-06-15 13:28 ` Mike Marciniszyn [this message]
2015-06-15 13:28 ` [PATCH v2 27/49] IB/hfi1: add memory region handling Mike Marciniszyn
2015-06-15 13:28 ` [PATCH v2 28/49] IB/hfi1: add misc OPA defines Mike Marciniszyn
2015-06-15 13:28 ` [PATCH v2 29/49] IB/hfi1: add pcie routines Mike Marciniszyn
2015-06-15 13:28 ` [PATCH v2 30/49] IB/hfi1: add pio handling Mike Marciniszyn
2015-06-15 13:28 ` [PATCH v2 31/49] IB/hfi1: add platform config definitions Mike Marciniszyn
2015-06-15 13:28 ` [PATCH v2 32/49] IB/hfi1: add qp handling Mike Marciniszyn
2015-06-15 13:28 ` [PATCH v2 33/49] IB/hfi1: add qsfp handling Mike Marciniszyn
2015-06-15 13:29 ` [PATCH v2 34/49] IB/hfi1: add RC QP handling Mike Marciniszyn
2015-06-15 13:29 ` [PATCH v2 35/49] IB/hfi1: add routines for RC/UC Mike Marciniszyn
2015-06-15 13:29 ` [PATCH v2 36/49] IB/hfi1: add sdma routines Mike Marciniszyn
2015-06-15 13:29 ` [PATCH v2 37/49] IB/hfi1: add sdma header file Mike Marciniszyn
2015-06-15 13:29 ` [PATCH v2 38/49] IB/hfi1: add SRQ handling Mike Marciniszyn
2015-06-15 13:29 ` [PATCH v2 39/49] IB/hfi1: add sysfs routines Mike Marciniszyn
[not found] ` <20150615132929.29741.87559.stgit-K+u1se/DcYrLESAwzcoQNrvm/XP+8Wra@public.gmane.org>
2015-06-15 19:14 ` Or Gerlitz
[not found] ` <CAJ3xEMiiqY04q4pnjRSm=7UBnS_jQJP-KhAkYEvu7FAu-F98sA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-06-15 19:20 ` Or Gerlitz
[not found] ` <CAJ3xEMiJ_0pFUvPJN7ov50v0hOZVsN7qC27ZbG5+pfmVuZQuMw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-06-17 11:48 ` Marciniszyn, Mike
[not found] ` <32E1700B9017364D9B60AED9960492BC257513D9-RjuIdWtd+YbTXloPLtfHfbfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2015-06-17 15:50 ` Or Gerlitz
[not found] ` <CAJ3xEMjdhyk2OOfeCV4sZMF=Fh06H-hJn_2y85V0eBLYBBgPiA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-07-08 22:32 ` Marciniszyn, Mike
[not found] ` <32E1700B9017364D9B60AED9960492BC2575DB49-RjuIdWtd+YbTXloPLtfHfbfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2015-07-08 23:22 ` ira.weiny
2015-06-15 13:29 ` [PATCH v2 40/49] IB/hfi1: add tracepoint debug routines Mike Marciniszyn
2015-06-15 13:29 ` [PATCH v2 41/49] IB/hfi1: add QSFP twsi routines Mike Marciniszyn
2015-06-15 13:29 ` [PATCH v2 42/49] IB/hfi1: add UC QP handling Mike Marciniszyn
2015-06-15 13:29 ` [PATCH v2 43/49] IB/hfi1: add UD " Mike Marciniszyn
2015-06-15 13:29 ` [PATCH v2 44/49] IB/hfi1: add low level page locking Mike Marciniszyn
2015-06-15 13:30 ` [PATCH v2 45/49] IB/hfi1: add PSM sdma hooks Mike Marciniszyn
2015-06-15 13:30 ` [PATCH v2 46/49] IB/hfi1: add general verbs handling Mike Marciniszyn
2015-06-15 13:30 ` [PATCH v2 47/49] IB/hfi1: add multicast routines Mike Marciniszyn
[not found] ` <20150615133012.29741.61892.stgit-K+u1se/DcYrLESAwzcoQNrvm/XP+8Wra@public.gmane.org>
2015-06-15 17:24 ` Christoph Lameter
[not found] ` <alpine.DEB.2.11.1506151222560.20941-wcBtFHqTun5QOdAKl3ChDw@public.gmane.org>
2015-06-17 12:14 ` Marciniszyn, Mike
2015-06-15 13:30 ` [PATCH v2 48/49] IB/hfi1: add driver make/config files Mike Marciniszyn
2015-06-15 13:30 ` [PATCH v2 49/49] IB/core: Add opa driver to kbuild Mike Marciniszyn
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