These changes are the raw update to linux-4.4.6-rt14. Kernel sources

are taken from kernel.org, and rt patch from the rt wiki download page.

During the rebasing, the following patch collided:

Force tick interrupt and get rid of softirq magic(I70131fb85).

Collisions have been removed because its logic was found on the
source already.

Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>

1 files changed, 0 insertions, 875 deletions

diff --git a/kernel/drivers/infiniband/hw/ipath/ipath_user_sdma.c b/kernel/drivers/infiniband/hw/ipath/ipath_user_sdma.c
deleted file mode 100644
index cc04b7ba3..000000000
--- a/kernel/drivers/infiniband/hw/ipath/ipath_user_sdma.c
+++ /dev/null
@@ -1,875 +0,0 @@
-/*
- * Copyright (c) 2007, 2008 QLogic Corporation. 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/types.h>
-#include <linux/device.h>
-#include <linux/dmapool.h>
-#include <linux/sched.h>
-#include <linux/slab.h>
-#include <linux/list.h>
-#include <linux/highmem.h>
-#include <linux/io.h>
-#include <linux/uio.h>
-#include <linux/rbtree.h>
-#include <linux/spinlock.h>
-#include <linux/delay.h>
-
-#include "ipath_kernel.h"
-#include "ipath_user_sdma.h"
-
-/* minimum size of header */
-#define IPATH_USER_SDMA_MIN_HEADER_LENGTH	64
-/* expected size of headers (for dma_pool) */
-#define IPATH_USER_SDMA_EXP_HEADER_LENGTH	64
-/* length mask in PBC (lower 11 bits) */
-#define IPATH_PBC_LENGTH_MASK			((1 << 11) - 1)
-
-struct ipath_user_sdma_pkt {
-	u8 naddr;		/* dimension of addr (1..3) ... */
-	u32 counter;		/* sdma pkts queued counter for this entry */
-	u64 added;		/* global descq number of entries */
-
-	struct {
-		u32 offset;			/* offset for kvaddr, addr */
-		u32 length;			/* length in page */
-		u8  put_page;			/* should we put_page? */
-		u8  dma_mapped;			/* is page dma_mapped? */
-		struct page *page;		/* may be NULL (coherent mem) */
-		void *kvaddr;			/* FIXME: only for pio hack */
-		dma_addr_t addr;
-	} addr[4];   /* max pages, any more and we coalesce */
-	struct list_head list;	/* list element */
-};
-
-struct ipath_user_sdma_queue {
-	/*
-	 * pkts sent to dma engine are queued on this
-	 * list head.  the type of the elements of this
-	 * list are struct ipath_user_sdma_pkt...
-	 */
-	struct list_head sent;
-
-	/* headers with expected length are allocated from here... */
-	char header_cache_name[64];
-	struct dma_pool *header_cache;
-
-	/* packets are allocated from the slab cache... */
-	char pkt_slab_name[64];
-	struct kmem_cache *pkt_slab;
-
-	/* as packets go on the queued queue, they are counted... */
-	u32 counter;
-	u32 sent_counter;
-
-	/* dma page table */
-	struct rb_root dma_pages_root;
-
-	/* protect everything above... */
-	struct mutex lock;
-};
-
-struct ipath_user_sdma_queue *
-ipath_user_sdma_queue_create(struct device *dev, int unit, int port, int sport)
-{
-	struct ipath_user_sdma_queue *pq =
-		kmalloc(sizeof(struct ipath_user_sdma_queue), GFP_KERNEL);
-
-	if (!pq)
-		goto done;
-
-	pq->counter = 0;
-	pq->sent_counter = 0;
-	INIT_LIST_HEAD(&pq->sent);
-
-	mutex_init(&pq->lock);
-
-	snprintf(pq->pkt_slab_name, sizeof(pq->pkt_slab_name),
-		 "ipath-user-sdma-pkts-%u-%02u.%02u", unit, port, sport);
-	pq->pkt_slab = kmem_cache_create(pq->pkt_slab_name,
-					 sizeof(struct ipath_user_sdma_pkt),
-					 0, 0, NULL);
-
-	if (!pq->pkt_slab)
-		goto err_kfree;
-
-	snprintf(pq->header_cache_name, sizeof(pq->header_cache_name),
-		 "ipath-user-sdma-headers-%u-%02u.%02u", unit, port, sport);
-	pq->header_cache = dma_pool_create(pq->header_cache_name,
-					   dev,
-					   IPATH_USER_SDMA_EXP_HEADER_LENGTH,
-					   4, 0);
-	if (!pq->header_cache)
-		goto err_slab;
-
-	pq->dma_pages_root = RB_ROOT;
-
-	goto done;
-
-err_slab:
-	kmem_cache_destroy(pq->pkt_slab);
-err_kfree:
-	kfree(pq);
-	pq = NULL;
-
-done:
-	return pq;
-}
-
-static void ipath_user_sdma_init_frag(struct ipath_user_sdma_pkt *pkt,
-				      int i, size_t offset, size_t len,
-				      int put_page, int dma_mapped,
-				      struct page *page,
-				      void *kvaddr, dma_addr_t dma_addr)
-{
-	pkt->addr[i].offset = offset;
-	pkt->addr[i].length = len;
-	pkt->addr[i].put_page = put_page;
-	pkt->addr[i].dma_mapped = dma_mapped;
-	pkt->addr[i].page = page;
-	pkt->addr[i].kvaddr = kvaddr;
-	pkt->addr[i].addr = dma_addr;
-}
-
-static void ipath_user_sdma_init_header(struct ipath_user_sdma_pkt *pkt,
-					u32 counter, size_t offset,
-					size_t len, int dma_mapped,
-					struct page *page,
-					void *kvaddr, dma_addr_t dma_addr)
-{
-	pkt->naddr = 1;
-	pkt->counter = counter;
-	ipath_user_sdma_init_frag(pkt, 0, offset, len, 0, dma_mapped, page,
-				  kvaddr, dma_addr);
-}
-
-/* we've too many pages in the iovec, coalesce to a single page */
-static int ipath_user_sdma_coalesce(const struct ipath_devdata *dd,
-				    struct ipath_user_sdma_pkt *pkt,
-				    const struct iovec *iov,
-				    unsigned long niov) {
-	int ret = 0;
-	struct page *page = alloc_page(GFP_KERNEL);
-	void *mpage_save;
-	char *mpage;
-	int i;
-	int len = 0;
-	dma_addr_t dma_addr;
-
-	if (!page) {
-		ret = -ENOMEM;
-		goto done;
-	}
-
-	mpage = kmap(page);
-	mpage_save = mpage;
-	for (i = 0; i < niov; i++) {
-		int cfur;
-
-		cfur = copy_from_user(mpage,
-				      iov[i].iov_base, iov[i].iov_len);
-		if (cfur) {
-			ret = -EFAULT;
-			goto free_unmap;
-		}
-
-		mpage += iov[i].iov_len;
-		len += iov[i].iov_len;
-	}
-
-	dma_addr = dma_map_page(&dd->pcidev->dev, page, 0, len,
-				DMA_TO_DEVICE);
-	if (dma_mapping_error(&dd->pcidev->dev, dma_addr)) {
-		ret = -ENOMEM;
-		goto free_unmap;
-	}
-
-	ipath_user_sdma_init_frag(pkt, 1, 0, len, 0, 1, page, mpage_save,
-				  dma_addr);
-	pkt->naddr = 2;
-
-	goto done;
-
-free_unmap:
-	kunmap(page);
-	__free_page(page);
-done:
-	return ret;
-}
-
-/* how many pages in this iovec element? */
-static int ipath_user_sdma_num_pages(const struct iovec *iov)
-{
-	const unsigned long addr  = (unsigned long) iov->iov_base;
-	const unsigned long  len  = iov->iov_len;
-	const unsigned long spage = addr & PAGE_MASK;
-	const unsigned long epage = (addr + len - 1) & PAGE_MASK;
-
-	return 1 + ((epage - spage) >> PAGE_SHIFT);
-}
-
-/* truncate length to page boundary */
-static int ipath_user_sdma_page_length(unsigned long addr, unsigned long len)
-{
-	const unsigned long offset = addr & ~PAGE_MASK;
-
-	return ((offset + len) > PAGE_SIZE) ? (PAGE_SIZE - offset) : len;
-}
-
-static void ipath_user_sdma_free_pkt_frag(struct device *dev,
-					  struct ipath_user_sdma_queue *pq,
-					  struct ipath_user_sdma_pkt *pkt,
-					  int frag)
-{
-	const int i = frag;
-
-	if (pkt->addr[i].page) {
-		if (pkt->addr[i].dma_mapped)
-			dma_unmap_page(dev,
-				       pkt->addr[i].addr,
-				       pkt->addr[i].length,
-				       DMA_TO_DEVICE);
-
-		if (pkt->addr[i].kvaddr)
-			kunmap(pkt->addr[i].page);
-
-		if (pkt->addr[i].put_page)
-			put_page(pkt->addr[i].page);
-		else
-			__free_page(pkt->addr[i].page);
-	} else if (pkt->addr[i].kvaddr)
-		/* free coherent mem from cache... */
-		dma_pool_free(pq->header_cache,
-			      pkt->addr[i].kvaddr, pkt->addr[i].addr);
-}
-
-/* return number of pages pinned... */
-static int ipath_user_sdma_pin_pages(const struct ipath_devdata *dd,
-				     struct ipath_user_sdma_pkt *pkt,
-				     unsigned long addr, int tlen, int npages)
-{
-	struct page *pages[2];
-	int j;
-	int ret;
-
-	ret = get_user_pages_fast(addr, npages, 0, pages);
-	if (ret != npages) {
-		int i;
-
-		for (i = 0; i < ret; i++)
-			put_page(pages[i]);
-
-		ret = -ENOMEM;
-		goto done;
-	}
-
-	for (j = 0; j < npages; j++) {
-		/* map the pages... */
-		const int flen =
-			ipath_user_sdma_page_length(addr, tlen);
-		dma_addr_t dma_addr =
-			dma_map_page(&dd->pcidev->dev,
-				     pages[j], 0, flen, DMA_TO_DEVICE);
-		unsigned long fofs = addr & ~PAGE_MASK;
-
-		if (dma_mapping_error(&dd->pcidev->dev, dma_addr)) {
-			ret = -ENOMEM;
-			goto done;
-		}
-
-		ipath_user_sdma_init_frag(pkt, pkt->naddr, fofs, flen, 1, 1,
-					  pages[j], kmap(pages[j]),
-					  dma_addr);
-
-		pkt->naddr++;
-		addr += flen;
-		tlen -= flen;
-	}
-
-done:
-	return ret;
-}
-
-static int ipath_user_sdma_pin_pkt(const struct ipath_devdata *dd,
-				   struct ipath_user_sdma_queue *pq,
-				   struct ipath_user_sdma_pkt *pkt,
-				   const struct iovec *iov,
-				   unsigned long niov)
-{
-	int ret = 0;
-	unsigned long idx;
-
-	for (idx = 0; idx < niov; idx++) {
-		const int npages = ipath_user_sdma_num_pages(iov + idx);
-		const unsigned long addr = (unsigned long) iov[idx].iov_base;
-
-		ret = ipath_user_sdma_pin_pages(dd, pkt,
-						addr, iov[idx].iov_len,
-						npages);
-		if (ret < 0)
-			goto free_pkt;
-	}
-
-	goto done;
-
-free_pkt:
-	for (idx = 0; idx < pkt->naddr; idx++)
-		ipath_user_sdma_free_pkt_frag(&dd->pcidev->dev, pq, pkt, idx);
-
-done:
-	return ret;
-}
-
-static int ipath_user_sdma_init_payload(const struct ipath_devdata *dd,
-					struct ipath_user_sdma_queue *pq,
-					struct ipath_user_sdma_pkt *pkt,
-					const struct iovec *iov,
-					unsigned long niov, int npages)
-{
-	int ret = 0;
-
-	if (npages >= ARRAY_SIZE(pkt->addr))
-		ret = ipath_user_sdma_coalesce(dd, pkt, iov, niov);
-	else
-		ret = ipath_user_sdma_pin_pkt(dd, pq, pkt, iov, niov);
-
-	return ret;
-}
-
-/* free a packet list -- return counter value of last packet */
-static void ipath_user_sdma_free_pkt_list(struct device *dev,
-					  struct ipath_user_sdma_queue *pq,
-					  struct list_head *list)
-{
-	struct ipath_user_sdma_pkt *pkt, *pkt_next;
-
-	list_for_each_entry_safe(pkt, pkt_next, list, list) {
-		int i;
-
-		for (i = 0; i < pkt->naddr; i++)
-			ipath_user_sdma_free_pkt_frag(dev, pq, pkt, i);
-
-		kmem_cache_free(pq->pkt_slab, pkt);
-	}
-}
-
-/*
- * copy headers, coalesce etc -- pq->lock must be held
- *
- * we queue all the packets to list, returning the
- * number of bytes total.  list must be empty initially,
- * as, if there is an error we clean it...
- */
-static int ipath_user_sdma_queue_pkts(const struct ipath_devdata *dd,
-				      struct ipath_user_sdma_queue *pq,
-				      struct list_head *list,
-				      const struct iovec *iov,
-				      unsigned long niov,
-				      int maxpkts)
-{
-	unsigned long idx = 0;
-	int ret = 0;
-	int npkts = 0;
-	struct page *page = NULL;
-	__le32 *pbc;
-	dma_addr_t dma_addr;
-	struct ipath_user_sdma_pkt *pkt = NULL;
-	size_t len;
-	size_t nw;
-	u32 counter = pq->counter;
-	int dma_mapped = 0;
-
-	while (idx < niov && npkts < maxpkts) {
-		const unsigned long addr = (unsigned long) iov[idx].iov_base;
-		const unsigned long idx_save = idx;
-		unsigned pktnw;
-		unsigned pktnwc;
-		int nfrags = 0;
-		int npages = 0;
-		int cfur;
-
-		dma_mapped = 0;
-		len = iov[idx].iov_len;
-		nw = len >> 2;
-		page = NULL;
-
-		pkt = kmem_cache_alloc(pq->pkt_slab, GFP_KERNEL);
-		if (!pkt) {
-			ret = -ENOMEM;
-			goto free_list;
-		}
-
-		if (len < IPATH_USER_SDMA_MIN_HEADER_LENGTH ||
-		    len > PAGE_SIZE || len & 3 || addr & 3) {
-			ret = -EINVAL;
-			goto free_pkt;
-		}
-
-		if (len == IPATH_USER_SDMA_EXP_HEADER_LENGTH)
-			pbc = dma_pool_alloc(pq->header_cache, GFP_KERNEL,
-					     &dma_addr);
-		else
-			pbc = NULL;
-
-		if (!pbc) {
-			page = alloc_page(GFP_KERNEL);
-			if (!page) {
-				ret = -ENOMEM;
-				goto free_pkt;
-			}
-			pbc = kmap(page);
-		}
-
-		cfur = copy_from_user(pbc, iov[idx].iov_base, len);
-		if (cfur) {
-			ret = -EFAULT;
-			goto free_pbc;
-		}
-
-		/*
-		 * this assignment is a bit strange.  it's because the
-		 * the pbc counts the number of 32 bit words in the full
-		 * packet _except_ the first word of the pbc itself...
-		 */
-		pktnwc = nw - 1;
-
-		/*
-		 * pktnw computation yields the number of 32 bit words
-		 * that the caller has indicated in the PBC.  note that
-		 * this is one less than the total number of words that
-		 * goes to the send DMA engine as the first 32 bit word
-		 * of the PBC itself is not counted.  Armed with this count,
-		 * we can verify that the packet is consistent with the
-		 * iovec lengths.
-		 */
-		pktnw = le32_to_cpu(*pbc) & IPATH_PBC_LENGTH_MASK;
-		if (pktnw < pktnwc || pktnw > pktnwc + (PAGE_SIZE >> 2)) {
-			ret = -EINVAL;
-			goto free_pbc;
-		}
-
-
-		idx++;
-		while (pktnwc < pktnw && idx < niov) {
-			const size_t slen = iov[idx].iov_len;
-			const unsigned long faddr =
-				(unsigned long) iov[idx].iov_base;
-
-			if (slen & 3 || faddr & 3 || !slen ||
-			    slen > PAGE_SIZE) {
-				ret = -EINVAL;
-				goto free_pbc;
-			}
-
-			npages++;
-			if ((faddr & PAGE_MASK) !=
-			    ((faddr + slen - 1) & PAGE_MASK))
-				npages++;
-
-			pktnwc += slen >> 2;
-			idx++;
-			nfrags++;
-		}
-
-		if (pktnwc != pktnw) {
-			ret = -EINVAL;
-			goto free_pbc;
-		}
-
-		if (page) {
-			dma_addr = dma_map_page(&dd->pcidev->dev,
-						page, 0, len, DMA_TO_DEVICE);
-			if (dma_mapping_error(&dd->pcidev->dev, dma_addr)) {
-				ret = -ENOMEM;
-				goto free_pbc;
-			}
-
-			dma_mapped = 1;
-		}
-
-		ipath_user_sdma_init_header(pkt, counter, 0, len, dma_mapped,
-					    page, pbc, dma_addr);
-
-		if (nfrags) {
-			ret = ipath_user_sdma_init_payload(dd, pq, pkt,
-							   iov + idx_save + 1,
-							   nfrags, npages);
-			if (ret < 0)
-				goto free_pbc_dma;
-		}
-
-		counter++;
-		npkts++;
-
-		list_add_tail(&pkt->list, list);
-	}
-
-	ret = idx;
-	goto done;
-
-free_pbc_dma:
-	if (dma_mapped)
-		dma_unmap_page(&dd->pcidev->dev, dma_addr, len, DMA_TO_DEVICE);
-free_pbc:
-	if (page) {
-		kunmap(page);
-		__free_page(page);
-	} else
-		dma_pool_free(pq->header_cache, pbc, dma_addr);
-free_pkt:
-	kmem_cache_free(pq->pkt_slab, pkt);
-free_list:
-	ipath_user_sdma_free_pkt_list(&dd->pcidev->dev, pq, list);
-done:
-	return ret;
-}
-
-static void ipath_user_sdma_set_complete_counter(struct ipath_user_sdma_queue *pq,
-						 u32 c)
-{
-	pq->sent_counter = c;
-}
-
-/* try to clean out queue -- needs pq->lock */
-static int ipath_user_sdma_queue_clean(const struct ipath_devdata *dd,
-				       struct ipath_user_sdma_queue *pq)
-{
-	struct list_head free_list;
-	struct ipath_user_sdma_pkt *pkt;
-	struct ipath_user_sdma_pkt *pkt_prev;
-	int ret = 0;
-
-	INIT_LIST_HEAD(&free_list);
-
-	list_for_each_entry_safe(pkt, pkt_prev, &pq->sent, list) {
-		s64 descd = dd->ipath_sdma_descq_removed - pkt->added;
-
-		if (descd < 0)
-			break;
-
-		list_move_tail(&pkt->list, &free_list);
-
-		/* one more packet cleaned */
-		ret++;
-	}
-
-	if (!list_empty(&free_list)) {
-		u32 counter;
-
-		pkt = list_entry(free_list.prev,
-				 struct ipath_user_sdma_pkt, list);
-		counter = pkt->counter;
-
-		ipath_user_sdma_free_pkt_list(&dd->pcidev->dev, pq, &free_list);
-		ipath_user_sdma_set_complete_counter(pq, counter);
-	}
-
-	return ret;
-}
-
-void ipath_user_sdma_queue_destroy(struct ipath_user_sdma_queue *pq)
-{
-	if (!pq)
-		return;
-
-	kmem_cache_destroy(pq->pkt_slab);
-	dma_pool_destroy(pq->header_cache);
-	kfree(pq);
-}
-
-/* clean descriptor queue, returns > 0 if some elements cleaned */
-static int ipath_user_sdma_hwqueue_clean(struct ipath_devdata *dd)
-{
-	int ret;
-	unsigned long flags;
-
-	spin_lock_irqsave(&dd->ipath_sdma_lock, flags);
-	ret = ipath_sdma_make_progress(dd);
-	spin_unlock_irqrestore(&dd->ipath_sdma_lock, flags);
-
-	return ret;
-}
-
-/* we're in close, drain packets so that we can cleanup successfully... */
-void ipath_user_sdma_queue_drain(struct ipath_devdata *dd,
-				 struct ipath_user_sdma_queue *pq)
-{
-	int i;
-
-	if (!pq)
-		return;
-
-	for (i = 0; i < 100; i++) {
-		mutex_lock(&pq->lock);
-		if (list_empty(&pq->sent)) {
-			mutex_unlock(&pq->lock);
-			break;
-		}
-		ipath_user_sdma_hwqueue_clean(dd);
-		ipath_user_sdma_queue_clean(dd, pq);
-		mutex_unlock(&pq->lock);
-		msleep(10);
-	}
-
-	if (!list_empty(&pq->sent)) {
-		struct list_head free_list;
-
-		printk(KERN_INFO "drain: lists not empty: forcing!\n");
-		INIT_LIST_HEAD(&free_list);
-		mutex_lock(&pq->lock);
-		list_splice_init(&pq->sent, &free_list);
-		ipath_user_sdma_free_pkt_list(&dd->pcidev->dev, pq, &free_list);
-		mutex_unlock(&pq->lock);
-	}
-}
-
-static inline __le64 ipath_sdma_make_desc0(struct ipath_devdata *dd,
-					   u64 addr, u64 dwlen, u64 dwoffset)
-{
-	return cpu_to_le64(/* SDmaPhyAddr[31:0] */
-			   ((addr & 0xfffffffcULL) << 32) |
-			   /* SDmaGeneration[1:0] */
-			   ((dd->ipath_sdma_generation & 3ULL) << 30) |
-			   /* SDmaDwordCount[10:0] */
-			   ((dwlen & 0x7ffULL) << 16) |
-			   /* SDmaBufOffset[12:2] */
-			   (dwoffset & 0x7ffULL));
-}
-
-static inline __le64 ipath_sdma_make_first_desc0(__le64 descq)
-{
-	return descq | cpu_to_le64(1ULL << 12);
-}
-
-static inline __le64 ipath_sdma_make_last_desc0(__le64 descq)
-{
-					      /* last */  /* dma head */
-	return descq | cpu_to_le64(1ULL << 11 | 1ULL << 13);
-}
-
-static inline __le64 ipath_sdma_make_desc1(u64 addr)
-{
-	/* SDmaPhyAddr[47:32] */
-	return cpu_to_le64(addr >> 32);
-}
-
-static void ipath_user_sdma_send_frag(struct ipath_devdata *dd,
-				      struct ipath_user_sdma_pkt *pkt, int idx,
-				      unsigned ofs, u16 tail)
-{
-	const u64 addr = (u64) pkt->addr[idx].addr +
-		(u64) pkt->addr[idx].offset;
-	const u64 dwlen = (u64) pkt->addr[idx].length / 4;
-	__le64 *descqp;
-	__le64 descq0;
-
-	descqp = &dd->ipath_sdma_descq[tail].qw[0];
-
-	descq0 = ipath_sdma_make_desc0(dd, addr, dwlen, ofs);
-	if (idx == 0)
-		descq0 = ipath_sdma_make_first_desc0(descq0);
-	if (idx == pkt->naddr - 1)
-		descq0 = ipath_sdma_make_last_desc0(descq0);
-
-	descqp[0] = descq0;
-	descqp[1] = ipath_sdma_make_desc1(addr);
-}
-
-/* pq->lock must be held, get packets on the wire... */
-static int ipath_user_sdma_push_pkts(struct ipath_devdata *dd,
-				     struct ipath_user_sdma_queue *pq,
-				     struct list_head *pktlist)
-{
-	int ret = 0;
-	unsigned long flags;
-	u16 tail;
-
-	if (list_empty(pktlist))
-		return 0;
-
-	if (unlikely(!(dd->ipath_flags & IPATH_LINKACTIVE)))
-		return -ECOMM;
-
-	spin_lock_irqsave(&dd->ipath_sdma_lock, flags);
-
-	if (unlikely(dd->ipath_sdma_status & IPATH_SDMA_ABORT_MASK)) {
-		ret = -ECOMM;
-		goto unlock;
-	}
-
-	tail = dd->ipath_sdma_descq_tail;
-	while (!list_empty(pktlist)) {
-		struct ipath_user_sdma_pkt *pkt =
-			list_entry(pktlist->next, struct ipath_user_sdma_pkt,
-				   list);
-		int i;
-		unsigned ofs = 0;
-		u16 dtail = tail;
-
-		if (pkt->naddr > ipath_sdma_descq_freecnt(dd))
-			goto unlock_check_tail;
-
-		for (i = 0; i < pkt->naddr; i++) {
-			ipath_user_sdma_send_frag(dd, pkt, i, ofs, tail);
-			ofs += pkt->addr[i].length >> 2;
-
-			if (++tail == dd->ipath_sdma_descq_cnt) {
-				tail = 0;
-				++dd->ipath_sdma_generation;
-			}
-		}
-
-		if ((ofs<<2) > dd->ipath_ibmaxlen) {
-			ipath_dbg("packet size %X > ibmax %X, fail\n",
-				ofs<<2, dd->ipath_ibmaxlen);
-			ret = -EMSGSIZE;
-			goto unlock;
-		}
-
-		/*
-		 * if the packet is >= 2KB mtu equivalent, we have to use
-		 * the large buffers, and have to mark each descriptor as
-		 * part of a large buffer packet.
-		 */
-		if (ofs >= IPATH_SMALLBUF_DWORDS) {
-			for (i = 0; i < pkt->naddr; i++) {
-				dd->ipath_sdma_descq[dtail].qw[0] |=
-					cpu_to_le64(1ULL << 14);
-				if (++dtail == dd->ipath_sdma_descq_cnt)
-					dtail = 0;
-			}
-		}
-
-		dd->ipath_sdma_descq_added += pkt->naddr;
-		pkt->added = dd->ipath_sdma_descq_added;
-		list_move_tail(&pkt->list, &pq->sent);
-		ret++;
-	}
-
-unlock_check_tail:
-	/* advance the tail on the chip if necessary */
-	if (dd->ipath_sdma_descq_tail != tail) {
-		wmb();
-		ipath_write_kreg(dd, dd->ipath_kregs->kr_senddmatail, tail);
-		dd->ipath_sdma_descq_tail = tail;
-	}
-
-unlock:
-	spin_unlock_irqrestore(&dd->ipath_sdma_lock, flags);
-
-	return ret;
-}
-
-int ipath_user_sdma_writev(struct ipath_devdata *dd,
-			   struct ipath_user_sdma_queue *pq,
-			   const struct iovec *iov,
-			   unsigned long dim)
-{
-	int ret = 0;
-	struct list_head list;
-	int npkts = 0;
-
-	INIT_LIST_HEAD(&list);
-
-	mutex_lock(&pq->lock);
-
-	if (dd->ipath_sdma_descq_added != dd->ipath_sdma_descq_removed) {
-		ipath_user_sdma_hwqueue_clean(dd);
-		ipath_user_sdma_queue_clean(dd, pq);
-	}
-
-	while (dim) {
-		const int mxp = 8;
-
-		ret = ipath_user_sdma_queue_pkts(dd, pq, &list, iov, dim, mxp);
-		if (ret <= 0)
-			goto done_unlock;
-		else {
-			dim -= ret;
-			iov += ret;
-		}
-
-		/* force packets onto the sdma hw queue... */
-		if (!list_empty(&list)) {
-			/*
-			 * lazily clean hw queue.  the 4 is a guess of about
-			 * how many sdma descriptors a packet will take (it
-			 * doesn't have to be perfect).
-			 */
-			if (ipath_sdma_descq_freecnt(dd) < ret * 4) {
-				ipath_user_sdma_hwqueue_clean(dd);
-				ipath_user_sdma_queue_clean(dd, pq);
-			}
-
-			ret = ipath_user_sdma_push_pkts(dd, pq, &list);
-			if (ret < 0)
-				goto done_unlock;
-			else {
-				npkts += ret;
-				pq->counter += ret;
-
-				if (!list_empty(&list))
-					goto done_unlock;
-			}
-		}
-	}
-
-done_unlock:
-	if (!list_empty(&list))
-		ipath_user_sdma_free_pkt_list(&dd->pcidev->dev, pq, &list);
-	mutex_unlock(&pq->lock);
-
-	return (ret < 0) ? ret : npkts;
-}
-
-int ipath_user_sdma_make_progress(struct ipath_devdata *dd,
-				  struct ipath_user_sdma_queue *pq)
-{
-	int ret = 0;
-
-	mutex_lock(&pq->lock);
-	ipath_user_sdma_hwqueue_clean(dd);
-	ret = ipath_user_sdma_queue_clean(dd, pq);
-	mutex_unlock(&pq->lock);
-
-	return ret;
-}
-
-u32 ipath_user_sdma_complete_counter(const struct ipath_user_sdma_queue *pq)
-{
-	return pq->sent_counter;
-}
-
-u32 ipath_user_sdma_inflight_counter(struct ipath_user_sdma_queue *pq)
-{
-	return pq->counter;
-}
-