IB/ipath: Deprecate ipath driver and move to staging.

It is now time for the ipath driver to begin to be phased out of the kernel.
This patch moves the ipath driver from the Infiniband sub tree to the staging
area where it will remain until the code is removed from the kernel in a few
releases.

Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

1 files changed, 0 insertions, 229 deletions

diff --git a/drivers/infiniband/hw/ipath/ipath_user_pages.c b/drivers/infiniband/hw/ipath/ipath_user_pages.c
deleted file mode 100644
index 1da1252dcdb3..000000000000
--- a/drivers/infiniband/hw/ipath/ipath_user_pages.c
+++ /dev/null
@@ -1,229 +0,0 @@
-/*
- * Copyright (c) 2006, 2007 QLogic Corporation. All rights reserved.
- * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved.
- *
- * This software is available to you under a choice of one of two
- * licenses.  You may choose to be licensed under the terms of the GNU
- * General Public License (GPL) Version 2, available from the file
- * COPYING in the main directory of this source tree, or the
- * OpenIB.org BSD license below:
- *
- *     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.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
- * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
- * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-
-#include <linux/mm.h>
-#include <linux/device.h>
-#include <linux/slab.h>
-#include <linux/sched.h>
-
-#include "ipath_kernel.h"
-
-static void __ipath_release_user_pages(struct page **p, size_t num_pages,
-				   int dirty)
-{
-	size_t i;
-
-	for (i = 0; i < num_pages; i++) {
-		ipath_cdbg(MM, "%lu/%lu put_page %p\n", (unsigned long) i,
-			   (unsigned long) num_pages, p[i]);
-		if (dirty)
-			set_page_dirty_lock(p[i]);
-		put_page(p[i]);
-	}
-}
-
-/* call with current->mm->mmap_sem held */
-static int __ipath_get_user_pages(unsigned long start_page, size_t num_pages,
-				  struct page **p)
-{
-	unsigned long lock_limit;
-	size_t got;
-	int ret;
-
-	lock_limit = rlimit(RLIMIT_MEMLOCK) >> PAGE_SHIFT;
-
-	if (num_pages > lock_limit) {
-		ret = -ENOMEM;
-		goto bail;
-	}
-
-	ipath_cdbg(VERBOSE, "pin %lx pages from vaddr %lx\n",
-		   (unsigned long) num_pages, start_page);
-
-	for (got = 0; got < num_pages; got += ret) {
-		ret = get_user_pages(current, current->mm,
-				     start_page + got * PAGE_SIZE,
-				     num_pages - got, 1, 1,
-				     p + got, NULL);
-		if (ret < 0)
-			goto bail_release;
-	}
-
-	current->mm->pinned_vm += num_pages;
-
-	ret = 0;
-	goto bail;
-
-bail_release:
-	__ipath_release_user_pages(p, got, 0);
-bail:
-	return ret;
-}
-
-/**
- * ipath_map_page - a safety wrapper around pci_map_page()
- *
- * A dma_addr of all 0's is interpreted by the chip as "disabled".
- * Unfortunately, it can also be a valid dma_addr returned on some
- * architectures.
- *
- * The powerpc iommu assigns dma_addrs in ascending order, so we don't
- * have to bother with retries or mapping a dummy page to insure we
- * don't just get the same mapping again.
- *
- * I'm sure we won't be so lucky with other iommu's, so FIXME.
- */
-dma_addr_t ipath_map_page(struct pci_dev *hwdev, struct page *page,
-	unsigned long offset, size_t size, int direction)
-{
-	dma_addr_t phys;
-
-	phys = pci_map_page(hwdev, page, offset, size, direction);
-
-	if (phys == 0) {
-		pci_unmap_page(hwdev, phys, size, direction);
-		phys = pci_map_page(hwdev, page, offset, size, direction);
-		/*
-		 * FIXME: If we get 0 again, we should keep this page,
-		 * map another, then free the 0 page.
-		 */
-	}
-
-	return phys;
-}
-
-/**
- * ipath_map_single - a safety wrapper around pci_map_single()
- *
- * Same idea as ipath_map_page().
- */
-dma_addr_t ipath_map_single(struct pci_dev *hwdev, void *ptr, size_t size,
-	int direction)
-{
-	dma_addr_t phys;
-
-	phys = pci_map_single(hwdev, ptr, size, direction);
-
-	if (phys == 0) {
-		pci_unmap_single(hwdev, phys, size, direction);
-		phys = pci_map_single(hwdev, ptr, size, direction);
-		/*
-		 * FIXME: If we get 0 again, we should keep this page,
-		 * map another, then free the 0 page.
-		 */
-	}
-
-	return phys;
-}
-
-/**
- * ipath_get_user_pages - lock user pages into memory
- * @start_page: the start page
- * @num_pages: the number of pages
- * @p: the output page structures
- *
- * This function takes a given start page (page aligned user virtual
- * address) and pins it and the following specified number of pages.  For
- * now, num_pages is always 1, but that will probably change at some point
- * (because caller is doing expected sends on a single virtually contiguous
- * buffer, so we can do all pages at once).
- */
-int ipath_get_user_pages(unsigned long start_page, size_t num_pages,
-			 struct page **p)
-{
-	int ret;
-
-	down_write(&current->mm->mmap_sem);
-
-	ret = __ipath_get_user_pages(start_page, num_pages, p);
-
-	up_write(&current->mm->mmap_sem);
-
-	return ret;
-}
-
-void ipath_release_user_pages(struct page **p, size_t num_pages)
-{
-	down_write(&current->mm->mmap_sem);
-
-	__ipath_release_user_pages(p, num_pages, 1);
-
-	current->mm->pinned_vm -= num_pages;
-
-	up_write(&current->mm->mmap_sem);
-}
-
-struct ipath_user_pages_work {
-	struct work_struct work;
-	struct mm_struct *mm;
-	unsigned long num_pages;
-};
-
-static void user_pages_account(struct work_struct *_work)
-{
-	struct ipath_user_pages_work *work =
-		container_of(_work, struct ipath_user_pages_work, work);
-
-	down_write(&work->mm->mmap_sem);
-	work->mm->pinned_vm -= work->num_pages;
-	up_write(&work->mm->mmap_sem);
-	mmput(work->mm);
-	kfree(work);
-}
-
-void ipath_release_user_pages_on_close(struct page **p, size_t num_pages)
-{
-	struct ipath_user_pages_work *work;
-	struct mm_struct *mm;
-
-	__ipath_release_user_pages(p, num_pages, 1);
-
-	mm = get_task_mm(current);
-	if (!mm)
-		return;
-
-	work = kmalloc(sizeof(*work), GFP_KERNEL);
-	if (!work)
-		goto bail_mm;
-
-	INIT_WORK(&work->work, user_pages_account);
-	work->mm = mm;
-	work->num_pages = num_pages;
-
-	queue_work(ib_wq, &work->work);
-	return;
-
-bail_mm:
-	mmput(mm);
-	return;
-}