dmaengine: remove iop-adma driver

The iop32x platform was removed, so this driver is no longer
needed.

Cc: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Dan Williams <dan.j.williams@intel.com>
Link: https://lore.kernel.org/r/20221019150410.3851944-10-arnd@kernel.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>

4 files changed, 0 insertions, 2477 deletions

diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig
index 7524b62a8870..b73fc89ba877 100644
--- a/drivers/dma/Kconfig
+++ b/drivers/dma/Kconfig
@@ -357,14 +357,6 @@ config INTEL_IOATDMA
 
 	  If unsure, say N.
 
-config INTEL_IOP_ADMA
-	tristate "Intel IOP32x ADMA support"
-	depends on ARCH_IOP32X || COMPILE_TEST
-	select DMA_ENGINE
-	select ASYNC_TX_ENABLE_CHANNEL_SWITCH
-	help
-	  Enable support for the Intel(R) IOP Series RAID engines.
-
 config K3_DMA
 	tristate "Hisilicon K3 DMA support"
 	depends on ARCH_HI3xxx || ARCH_HISI || COMPILE_TEST
diff --git a/drivers/dma/Makefile b/drivers/dma/Makefile
index 10f7d4241001..5b55ada052a7 100644
--- a/drivers/dma/Makefile
+++ b/drivers/dma/Makefile
@@ -44,7 +44,6 @@ obj-$(CONFIG_IMX_SDMA) += imx-sdma.o
 obj-$(CONFIG_INTEL_IDMA64) += idma64.o
 obj-$(CONFIG_INTEL_IOATDMA) += ioat/
 obj-y += idxd/
-obj-$(CONFIG_INTEL_IOP_ADMA) += iop-adma.o
 obj-$(CONFIG_K3_DMA) += k3dma.o
 obj-$(CONFIG_LPC18XX_DMAMUX) += lpc18xx-dmamux.o
 obj-$(CONFIG_MILBEAUT_HDMAC) += milbeaut-hdmac.o
diff --git a/drivers/dma/iop-adma.c b/drivers/dma/iop-adma.c
deleted file mode 100644
index 310b899d581f..000000000000
--- a/drivers/dma/iop-adma.c
+++ /dev/null
@@ -1,1554 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * offload engine driver for the Intel Xscale series of i/o processors
- * Copyright © 2006, Intel Corporation.
- */
-
-/*
- * This driver supports the asynchrounous DMA copy and RAID engines available
- * on the Intel Xscale(R) family of I/O Processors (IOP 32x, 33x, 134x)
- */
-
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/delay.h>
-#include <linux/dma-mapping.h>
-#include <linux/spinlock.h>
-#include <linux/interrupt.h>
-#include <linux/platform_device.h>
-#include <linux/prefetch.h>
-#include <linux/memory.h>
-#include <linux/ioport.h>
-#include <linux/raid/pq.h>
-#include <linux/slab.h>
-
-#include "iop-adma.h"
-#include "dmaengine.h"
-
-#define to_iop_adma_chan(chan) container_of(chan, struct iop_adma_chan, common)
-#define to_iop_adma_device(dev) \
-	container_of(dev, struct iop_adma_device, common)
-#define tx_to_iop_adma_slot(tx) \
-	container_of(tx, struct iop_adma_desc_slot, async_tx)
-
-/**
- * iop_adma_free_slots - flags descriptor slots for reuse
- * @slot: Slot to free
- * Caller must hold &iop_chan->lock while calling this function
- */
-static void iop_adma_free_slots(struct iop_adma_desc_slot *slot)
-{
-	int stride = slot->slots_per_op;
-
-	while (stride--) {
-		slot->slots_per_op = 0;
-		slot = list_entry(slot->slot_node.next,
-				struct iop_adma_desc_slot,
-				slot_node);
-	}
-}
-
-static dma_cookie_t
-iop_adma_run_tx_complete_actions(struct iop_adma_desc_slot *desc,
-	struct iop_adma_chan *iop_chan, dma_cookie_t cookie)
-{
-	struct dma_async_tx_descriptor *tx = &desc->async_tx;
-
-	BUG_ON(tx->cookie < 0);
-	if (tx->cookie > 0) {
-		cookie = tx->cookie;
-		tx->cookie = 0;
-
-		/* call the callback (must not sleep or submit new
-		 * operations to this channel)
-		 */
-		dmaengine_desc_get_callback_invoke(tx, NULL);
-
-		dma_descriptor_unmap(tx);
-		if (desc->group_head)
-			desc->group_head = NULL;
-	}
-
-	/* run dependent operations */
-	dma_run_dependencies(tx);
-
-	return cookie;
-}
-
-static int
-iop_adma_clean_slot(struct iop_adma_desc_slot *desc,
-	struct iop_adma_chan *iop_chan)
-{
-	/* the client is allowed to attach dependent operations
-	 * until 'ack' is set
-	 */
-	if (!async_tx_test_ack(&desc->async_tx))
-		return 0;
-
-	/* leave the last descriptor in the chain
-	 * so we can append to it
-	 */
-	if (desc->chain_node.next == &iop_chan->chain)
-		return 1;
-
-	dev_dbg(iop_chan->device->common.dev,
-		"\tfree slot: %d slots_per_op: %d\n",
-		desc->idx, desc->slots_per_op);
-
-	list_del(&desc->chain_node);
-	iop_adma_free_slots(desc);
-
-	return 0;
-}
-
-static void __iop_adma_slot_cleanup(struct iop_adma_chan *iop_chan)
-{
-	struct iop_adma_desc_slot *iter, *_iter, *grp_start = NULL;
-	dma_cookie_t cookie = 0;
-	u32 current_desc = iop_chan_get_current_descriptor(iop_chan);
-	int busy = iop_chan_is_busy(iop_chan);
-	int seen_current = 0, slot_cnt = 0, slots_per_op = 0;
-
-	dev_dbg(iop_chan->device->common.dev, "%s\n", __func__);
-	/* free completed slots from the chain starting with
-	 * the oldest descriptor
-	 */
-	list_for_each_entry_safe(iter, _iter, &iop_chan->chain,
-					chain_node) {
-		pr_debug("\tcookie: %d slot: %d busy: %d "
-			"this_desc: %pad next_desc: %#llx ack: %d\n",
-			iter->async_tx.cookie, iter->idx, busy,
-			&iter->async_tx.phys, (u64)iop_desc_get_next_desc(iter),
-			async_tx_test_ack(&iter->async_tx));
-		prefetch(_iter);
-		prefetch(&_iter->async_tx);
-
-		/* do not advance past the current descriptor loaded into the
-		 * hardware channel, subsequent descriptors are either in
-		 * process or have not been submitted
-		 */
-		if (seen_current)
-			break;
-
-		/* stop the search if we reach the current descriptor and the
-		 * channel is busy, or if it appears that the current descriptor
-		 * needs to be re-read (i.e. has been appended to)
-		 */
-		if (iter->async_tx.phys == current_desc) {
-			BUG_ON(seen_current++);
-			if (busy || iop_desc_get_next_desc(iter))
-				break;
-		}
-
-		/* detect the start of a group transaction */
-		if (!slot_cnt && !slots_per_op) {
-			slot_cnt = iter->slot_cnt;
-			slots_per_op = iter->slots_per_op;
-			if (slot_cnt <= slots_per_op) {
-				slot_cnt = 0;
-				slots_per_op = 0;
-			}
-		}
-
-		if (slot_cnt) {
-			pr_debug("\tgroup++\n");
-			if (!grp_start)
-				grp_start = iter;
-			slot_cnt -= slots_per_op;
-		}
-
-		/* all the members of a group are complete */
-		if (slots_per_op != 0 && slot_cnt == 0) {
-			struct iop_adma_desc_slot *grp_iter, *_grp_iter;
-			int end_of_chain = 0;
-			pr_debug("\tgroup end\n");
-
-			/* collect the total results */
-			if (grp_start->xor_check_result) {
-				u32 zero_sum_result = 0;
-				slot_cnt = grp_start->slot_cnt;
-				grp_iter = grp_start;
-
-				list_for_each_entry_from(grp_iter,
-					&iop_chan->chain, chain_node) {
-					zero_sum_result |=
-					    iop_desc_get_zero_result(grp_iter);
-					pr_debug("\titer%d result: %d\n",
-					    grp_iter->idx, zero_sum_result);
-					slot_cnt -= slots_per_op;
-					if (slot_cnt == 0)
-						break;
-				}
-				pr_debug("\tgrp_start->xor_check_result: %p\n",
-					grp_start->xor_check_result);
-				*grp_start->xor_check_result = zero_sum_result;
-			}
-
-			/* clean up the group */
-			slot_cnt = grp_start->slot_cnt;
-			grp_iter = grp_start;
-			list_for_each_entry_safe_from(grp_iter, _grp_iter,
-				&iop_chan->chain, chain_node) {
-				cookie = iop_adma_run_tx_complete_actions(
-					grp_iter, iop_chan, cookie);
-
-				slot_cnt -= slots_per_op;
-				end_of_chain = iop_adma_clean_slot(grp_iter,
-					iop_chan);
-
-				if (slot_cnt == 0 || end_of_chain)
-					break;
-			}
-
-			/* the group should be complete at this point */
-			BUG_ON(slot_cnt);
-
-			slots_per_op = 0;
-			grp_start = NULL;
-			if (end_of_chain)
-				break;
-			else
-				continue;
-		} else if (slots_per_op) /* wait for group completion */
-			continue;
-
-		/* write back zero sum results (single descriptor case) */
-		if (iter->xor_check_result && iter->async_tx.cookie)
-			*iter->xor_check_result =
-				iop_desc_get_zero_result(iter);
-
-		cookie = iop_adma_run_tx_complete_actions(
-					iter, iop_chan, cookie);
-
-		if (iop_adma_clean_slot(iter, iop_chan))
-			break;
-	}
-
-	if (cookie > 0) {
-		iop_chan->common.completed_cookie = cookie;
-		pr_debug("\tcompleted cookie %d\n", cookie);
-	}
-}
-
-static void
-iop_adma_slot_cleanup(struct iop_adma_chan *iop_chan)
-{
-	spin_lock_bh(&iop_chan->lock);
-	__iop_adma_slot_cleanup(iop_chan);
-	spin_unlock_bh(&iop_chan->lock);
-}
-
-static void iop_adma_tasklet(struct tasklet_struct *t)
-{
-	struct iop_adma_chan *iop_chan = from_tasklet(iop_chan, t,
-						      irq_tasklet);
-
-	/* lockdep will flag depedency submissions as potentially
-	 * recursive locking, this is not the case as a dependency
-	 * submission will never recurse a channels submit routine.
-	 * There are checks in async_tx.c to prevent this.
-	 */
-	spin_lock_nested(&iop_chan->lock, SINGLE_DEPTH_NESTING);
-	__iop_adma_slot_cleanup(iop_chan);
-	spin_unlock(&iop_chan->lock);
-}
-
-static struct iop_adma_desc_slot *
-iop_adma_alloc_slots(struct iop_adma_chan *iop_chan, int num_slots,
-			int slots_per_op)
-{
-	struct iop_adma_desc_slot *iter, *_iter, *alloc_start = NULL;
-	LIST_HEAD(chain);
-	int slots_found, retry = 0;
-
-	/* start search from the last allocated descrtiptor
-	 * if a contiguous allocation can not be found start searching
-	 * from the beginning of the list
-	 */
-retry:
-	slots_found = 0;
-	if (retry == 0)
-		iter = iop_chan->last_used;
-	else
-		iter = list_entry(&iop_chan->all_slots,
-			struct iop_adma_desc_slot,
-			slot_node);
-
-	list_for_each_entry_safe_continue(
-		iter, _iter, &iop_chan->all_slots, slot_node) {
-		prefetch(_iter);
-		prefetch(&_iter->async_tx);
-		if (iter->slots_per_op) {
-			/* give up after finding the first busy slot
-			 * on the second pass through the list
-			 */
-			if (retry)
-				break;
-
-			slots_found = 0;
-			continue;
-		}
-
-		/* start the allocation if the slot is correctly aligned */
-		if (!slots_found++) {
-			if (iop_desc_is_aligned(iter, slots_per_op))
-				alloc_start = iter;
-			else {
-				slots_found = 0;
-				continue;
-			}
-		}
-
-		if (slots_found == num_slots) {
-			struct iop_adma_desc_slot *alloc_tail = NULL;
-			struct iop_adma_desc_slot *last_used = NULL;
-			iter = alloc_start;
-			while (num_slots) {
-				int i;
-				dev_dbg(iop_chan->device->common.dev,
-					"allocated slot: %d "
-					"(desc %p phys: %#llx) slots_per_op %d\n",
-					iter->idx, iter->hw_desc,
-					(u64)iter->async_tx.phys, slots_per_op);
-
-				/* pre-ack all but the last descriptor */
-				if (num_slots != slots_per_op)
-					async_tx_ack(&iter->async_tx);
-
-				list_add_tail(&iter->chain_node, &chain);
-				alloc_tail = iter;
-				iter->async_tx.cookie = 0;
-				iter->slot_cnt = num_slots;
-				iter->xor_check_result = NULL;
-				for (i = 0; i < slots_per_op; i++) {
-					iter->slots_per_op = slots_per_op - i;
-					last_used = iter;
-					iter = list_entry(iter->slot_node.next,
-						struct iop_adma_desc_slot,
-						slot_node);
-				}
-				num_slots -= slots_per_op;
-			}
-			alloc_tail->group_head = alloc_start;
-			alloc_tail->async_tx.cookie = -EBUSY;
-			list_splice(&chain, &alloc_tail->tx_list);
-			iop_chan->last_used = last_used;
-			iop_desc_clear_next_desc(alloc_start);
-			iop_desc_clear_next_desc(alloc_tail);
-			return alloc_tail;
-		}
-	}
-	if (!retry++)
-		goto retry;
-
-	/* perform direct reclaim if the allocation fails */
-	__iop_adma_slot_cleanup(iop_chan);
-
-	return NULL;
-}
-
-static void iop_adma_check_threshold(struct iop_adma_chan *iop_chan)
-{
-	dev_dbg(iop_chan->device->common.dev, "pending: %d\n",
-		iop_chan->pending);
-
-	if (iop_chan->pending >= IOP_ADMA_THRESHOLD) {
-		iop_chan->pending = 0;
-		iop_chan_append(iop_chan);
-	}
-}
-
-static dma_cookie_t
-iop_adma_tx_submit(struct dma_async_tx_descriptor *tx)
-{
-	struct iop_adma_desc_slot *sw_desc = tx_to_iop_adma_slot(tx);
-	struct iop_adma_chan *iop_chan = to_iop_adma_chan(tx->chan);
-	struct iop_adma_desc_slot *grp_start, *old_chain_tail;
-	int slot_cnt;
-	dma_cookie_t cookie;
-	dma_addr_t next_dma;
-
-	grp_start = sw_desc->group_head;
-	slot_cnt = grp_start->slot_cnt;
-
-	spin_lock_bh(&iop_chan->lock);
-	cookie = dma_cookie_assign(tx);
-
-	old_chain_tail = list_entry(iop_chan->chain.prev,
-		struct iop_adma_desc_slot, chain_node);
-	list_splice_init(&sw_desc->tx_list,
-			 &old_chain_tail->chain_node);
-
-	/* fix up the hardware chain */
-	next_dma = grp_start->async_tx.phys;
-	iop_desc_set_next_desc(old_chain_tail, next_dma);
-	BUG_ON(iop_desc_get_next_desc(old_chain_tail) != next_dma); /* flush */
-
-	/* check for pre-chained descriptors */
-	iop_paranoia(iop_desc_get_next_desc(sw_desc));
-
-	/* increment the pending count by the number of slots
-	 * memcpy operations have a 1:1 (slot:operation) relation
-	 * other operations are heavier and will pop the threshold
-	 * more often.
-	 */
-	iop_chan->pending += slot_cnt;
-	iop_adma_check_threshold(iop_chan);
-	spin_unlock_bh(&iop_chan->lock);
-
-	dev_dbg(iop_chan->device->common.dev, "%s cookie: %d slot: %d\n",
-		__func__, sw_desc->async_tx.cookie, sw_desc->idx);
-
-	return cookie;
-}
-
-static void iop_chan_start_null_memcpy(struct iop_adma_chan *iop_chan);
-static void iop_chan_start_null_xor(struct iop_adma_chan *iop_chan);
-
-/**
- * iop_adma_alloc_chan_resources -  returns the number of allocated descriptors
- * @chan: allocate descriptor resources for this channel
- *
- * Note: We keep the slots for 1 operation on iop_chan->chain at all times.  To
- * avoid deadlock, via async_xor, num_descs_in_pool must at a minimum be
- * greater than 2x the number slots needed to satisfy a device->max_xor
- * request.
- * */
-static int iop_adma_alloc_chan_resources(struct dma_chan *chan)
-{
-	char *hw_desc;
-	dma_addr_t dma_desc;
-	int idx;
-	struct iop_adma_chan *iop_chan = to_iop_adma_chan(chan);
-	struct iop_adma_desc_slot *slot = NULL;
-	int init = iop_chan->slots_allocated ? 0 : 1;
-	struct iop_adma_platform_data *plat_data =
-		dev_get_platdata(&iop_chan->device->pdev->dev);
-	int num_descs_in_pool = plat_data->pool_size/IOP_ADMA_SLOT_SIZE;
-
-	/* Allocate descriptor slots */
-	do {
-		idx = iop_chan->slots_allocated;
-		if (idx == num_descs_in_pool)
-			break;
-
-		slot = kzalloc(sizeof(*slot), GFP_KERNEL);
-		if (!slot) {
-			printk(KERN_INFO "IOP ADMA Channel only initialized"
-				" %d descriptor slots", idx);
-			break;
-		}
-		hw_desc = (char *) iop_chan->device->dma_desc_pool_virt;
-		slot->hw_desc = (void *) &hw_desc[idx * IOP_ADMA_SLOT_SIZE];
-
-		dma_async_tx_descriptor_init(&slot->async_tx, chan);
-		slot->async_tx.tx_submit = iop_adma_tx_submit;
-		INIT_LIST_HEAD(&slot->tx_list);
-		INIT_LIST_HEAD(&slot->chain_node);
-		INIT_LIST_HEAD(&slot->slot_node);
-		dma_desc = iop_chan->device->dma_desc_pool;
-		slot->async_tx.phys = dma_desc + idx * IOP_ADMA_SLOT_SIZE;
-		slot->idx = idx;
-
-		spin_lock_bh(&iop_chan->lock);
-		iop_chan->slots_allocated++;
-		list_add_tail(&slot->slot_node, &iop_chan->all_slots);
-		spin_unlock_bh(&iop_chan->lock);
-	} while (iop_chan->slots_allocated < num_descs_in_pool);
-
-	if (idx && !iop_chan->last_used)
-		iop_chan->last_used = list_entry(iop_chan->all_slots.next,
-					struct iop_adma_desc_slot,
-					slot_node);
-
-	dev_dbg(iop_chan->device->common.dev,
-		"allocated %d descriptor slots last_used: %p\n",
-		iop_chan->slots_allocated, iop_chan->last_used);
-
-	/* initialize the channel and the chain with a null operation */
-	if (init) {
-		if (dma_has_cap(DMA_MEMCPY,
-			iop_chan->device->common.cap_mask))
-			iop_chan_start_null_memcpy(iop_chan);
-		else if (dma_has_cap(DMA_XOR,
-			iop_chan->device->common.cap_mask))
-			iop_chan_start_null_xor(iop_chan);
-		else
-			BUG();
-	}
-
-	return (idx > 0) ? idx : -ENOMEM;
-}
-
-static struct dma_async_tx_descriptor *
-iop_adma_prep_dma_interrupt(struct dma_chan *chan, unsigned long flags)
-{
-	struct iop_adma_chan *iop_chan = to_iop_adma_chan(chan);
-	struct iop_adma_desc_slot *sw_desc, *grp_start;
-	int slot_cnt, slots_per_op;
-
-	dev_dbg(iop_chan->device->common.dev, "%s\n", __func__);
-
-	spin_lock_bh(&iop_chan->lock);
-	slot_cnt = iop_chan_interrupt_slot_count(&slots_per_op, iop_chan);
-	sw_desc = iop_adma_alloc_slots(iop_chan, slot_cnt, slots_per_op);
-	if (sw_desc) {
-		grp_start = sw_desc->group_head;
-		iop_desc_init_interrupt(grp_start, iop_chan);
-		sw_desc->async_tx.flags = flags;
-	}
-	spin_unlock_bh(&iop_chan->lock);
-
-	return sw_desc ? &sw_desc->async_tx : NULL;
-}
-
-static struct dma_async_tx_descriptor *
-iop_adma_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dma_dest,
-			 dma_addr_t dma_src, size_t len, unsigned long flags)
-{
-	struct iop_adma_chan *iop_chan = to_iop_adma_chan(chan);
-	struct iop_adma_desc_slot *sw_desc, *grp_start;
-	int slot_cnt, slots_per_op;
-
-	if (unlikely(!len))
-		return NULL;
-	BUG_ON(len > IOP_ADMA_MAX_BYTE_COUNT);
-
-	dev_dbg(iop_chan->device->common.dev, "%s len: %zu\n",
-		__func__, len);
-
-	spin_lock_bh(&iop_chan->lock);
-	slot_cnt = iop_chan_memcpy_slot_count(len, &slots_per_op);
-	sw_desc = iop_adma_alloc_slots(iop_chan, slot_cnt, slots_per_op);
-	if (sw_desc) {
-		grp_start = sw_desc->group_head;
-		iop_desc_init_memcpy(grp_start, flags);
-		iop_desc_set_byte_count(grp_start, iop_chan, len);
-		iop_desc_set_dest_addr(grp_start, iop_chan, dma_dest);
-		iop_desc_set_memcpy_src_addr(grp_start, dma_src);
-		sw_desc->async_tx.flags = flags;
-	}
-	spin_unlock_bh(&iop_chan->lock);
-
-	return sw_desc ? &sw_desc->async_tx : NULL;
-}
-
-static struct dma_async_tx_descriptor *
-iop_adma_prep_dma_xor(struct dma_chan *chan, dma_addr_t dma_dest,
-		      dma_addr_t *dma_src, unsigned int src_cnt, size_t len,
-		      unsigned long flags)
-{
-	struct iop_adma_chan *iop_chan = to_iop_adma_chan(chan);
-	struct iop_adma_desc_slot *sw_desc, *grp_start;
-	int slot_cnt, slots_per_op;
-
-	if (unlikely(!len))
-		return NULL;
-	BUG_ON(len > IOP_ADMA_XOR_MAX_BYTE_COUNT);
-
-	dev_dbg(iop_chan->device->common.dev,
-		"%s src_cnt: %d len: %zu flags: %lx\n",
-		__func__, src_cnt, len, flags);
-
-	spin_lock_bh(&iop_chan->lock);
-	slot_cnt = iop_chan_xor_slot_count(len, src_cnt, &slots_per_op);
-	sw_desc = iop_adma_alloc_slots(iop_chan, slot_cnt, slots_per_op);
-	if (sw_desc) {
-		grp_start = sw_desc->group_head;
-		iop_desc_init_xor(grp_start, src_cnt, flags);
-		iop_desc_set_byte_count(grp_start, iop_chan, len);
-		iop_desc_set_dest_addr(grp_start, iop_chan, dma_dest);
-		sw_desc->async_tx.flags = flags;
-		while (src_cnt--)
-			iop_desc_set_xor_src_addr(grp_start, src_cnt,
-						  dma_src[src_cnt]);
-	}
-	spin_unlock_bh(&iop_chan->lock);
-
-	return sw_desc ? &sw_desc->async_tx : NULL;
-}
-
-static struct dma_async_tx_descriptor *
-iop_adma_prep_dma_xor_val(struct dma_chan *chan, dma_addr_t *dma_src,
-			  unsigned int src_cnt, size_t len, u32 *result,
-			  unsigned long flags)
-{
-	struct iop_adma_chan *iop_chan = to_iop_adma_chan(chan);
-	struct iop_adma_desc_slot *sw_desc, *grp_start;
-	int slot_cnt, slots_per_op;
-
-	if (unlikely(!len))
-		return NULL;
-
-	dev_dbg(iop_chan->device->common.dev, "%s src_cnt: %d len: %zu\n",
-		__func__, src_cnt, len);
-
-	spin_lock_bh(&iop_chan->lock);
-	slot_cnt = iop_chan_zero_sum_slot_count(len, src_cnt, &slots_per_op);
-	sw_desc = iop_adma_alloc_slots(iop_chan, slot_cnt, slots_per_op);
-	if (sw_desc) {
-		grp_start = sw_desc->group_head;
-		iop_desc_init_zero_sum(grp_start, src_cnt, flags);
-		iop_desc_set_zero_sum_byte_count(grp_start, len);
-		grp_start->xor_check_result = result;
-		pr_debug("\t%s: grp_start->xor_check_result: %p\n",
-			__func__, grp_start->xor_check_result);
-		sw_desc->async_tx.flags = flags;
-		while (src_cnt--)
-			iop_desc_set_zero_sum_src_addr(grp_start, src_cnt,
-						       dma_src[src_cnt]);
-	}
-	spin_unlock_bh(&iop_chan->lock);
-
-	return sw_desc ? &sw_desc->async_tx : NULL;
-}
-
-static struct dma_async_tx_descriptor *
-iop_adma_prep_dma_pq(struct dma_chan *chan, dma_addr_t *dst, dma_addr_t *src,
-		     unsigned int src_cnt, const unsigned char *scf, size_t len,
-		     unsigned long flags)
-{
-	struct iop_adma_chan *iop_chan = to_iop_adma_chan(chan);
-	struct iop_adma_desc_slot *sw_desc, *g;
-	int slot_cnt, slots_per_op;
-	int continue_srcs;
-
-	if (unlikely(!len))
-		return NULL;
-	BUG_ON(len > IOP_ADMA_XOR_MAX_BYTE_COUNT);
-
-	dev_dbg(iop_chan->device->common.dev,
-		"%s src_cnt: %d len: %zu flags: %lx\n",
-		__func__, src_cnt, len, flags);
-
-	if (dmaf_p_disabled_continue(flags))
-		continue_srcs = 1+src_cnt;
-	else if (dmaf_continue(flags))
-		continue_srcs = 3+src_cnt;
-	else
-		continue_srcs = 0+src_cnt;
-
-	spin_lock_bh(&iop_chan->lock);
-	slot_cnt = iop_chan_pq_slot_count(len, continue_srcs, &slots_per_op);
-	sw_desc = iop_adma_alloc_slots(iop_chan, slot_cnt, slots_per_op);
-	if (sw_desc) {
-		int i;
-
-		g = sw_desc->group_head;
-		iop_desc_set_byte_count(g, iop_chan, len);
-
-		/* even if P is disabled its destination address (bits
-		 * [3:0]) must match Q.  It is ok if P points to an
-		 * invalid address, it won't be written.
-		 */
-		if (flags & DMA_PREP_PQ_DISABLE_P)
-			dst[0] = dst[1] & 0x7;
-
-		iop_desc_set_pq_addr(g, dst);
-		sw_desc->async_tx.flags = flags;
-		for (i = 0; i < src_cnt; i++)
-			iop_desc_set_pq_src_addr(g, i, src[i], scf[i]);
-
-		/* if we are continuing a previous operation factor in
-		 * the old p and q values, see the comment for dma_maxpq
-		 * in include/linux/dmaengine.h
-		 */
-		if (dmaf_p_disabled_continue(flags))
-			iop_desc_set_pq_src_addr(g, i++, dst[1], 1);
-		else if (dmaf_continue(flags)) {
-			iop_desc_set_pq_src_addr(g, i++, dst[0], 0);
-			iop_desc_set_pq_src_addr(g, i++, dst[1], 1);
-			iop_desc_set_pq_src_addr(g, i++, dst[1], 0);
-		}
-		iop_desc_init_pq(g, i, flags);
-	}
-	spin_unlock_bh(&iop_chan->lock);
-
-	return sw_desc ? &sw_desc->async_tx : NULL;
-}
-
-static struct dma_async_tx_descriptor *
-iop_adma_prep_dma_pq_val(struct dma_chan *chan, dma_addr_t *pq, dma_addr_t *src,
-			 unsigned int src_cnt, const unsigned char *scf,
-			 size_t len, enum sum_check_flags *pqres,
-			 unsigned long flags)
-{
-	struct iop_adma_chan *iop_chan = to_iop_adma_chan(chan);
-	struct iop_adma_desc_slot *sw_desc, *g;
-	int slot_cnt, slots_per_op;
-
-	if (unlikely(!len))
-		return NULL;
-	BUG_ON(len > IOP_ADMA_XOR_MAX_BYTE_COUNT);
-
-	dev_dbg(iop_chan->device->common.dev, "%s src_cnt: %d len: %zu\n",
-		__func__, src_cnt, len);
-
-	spin_lock_bh(&iop_chan->lock);
-	slot_cnt = iop_chan_pq_zero_sum_slot_count(len, src_cnt + 2, &slots_per_op);
-	sw_desc = iop_adma_alloc_slots(iop_chan, slot_cnt, slots_per_op);
-	if (sw_desc) {
-		/* for validate operations p and q are tagged onto the
-		 * end of the source list
-		 */
-		int pq_idx = src_cnt;
-
-		g = sw_desc->group_head;
-		iop_desc_init_pq_zero_sum(g, src_cnt+2, flags);
-		iop_desc_set_pq_zero_sum_byte_count(g, len);
-		g->pq_check_result = pqres;
-		pr_debug("\t%s: g->pq_check_result: %p\n",
-			__func__, g->pq_check_result);
-		sw_desc->async_tx.flags = flags;
-		while (src_cnt--)
-			iop_desc_set_pq_zero_sum_src_addr(g, src_cnt,
-							  src[src_cnt],
-							  scf[src_cnt]);
-		iop_desc_set_pq_zero_sum_addr(g, pq_idx, src);
-	}
-	spin_unlock_bh(&iop_chan->lock);
-
-	return sw_desc ? &sw_desc->async_tx : NULL;
-}
-
-static void iop_adma_free_chan_resources(struct dma_chan *chan)
-{
-	struct iop_adma_chan *iop_chan = to_iop_adma_chan(chan);
-	struct iop_adma_desc_slot *iter, *_iter;
-	int in_use_descs = 0;
-
-	iop_adma_slot_cleanup(iop_chan);
-
-	spin_lock_bh(&iop_chan->lock);
-	list_for_each_entry_safe(iter, _iter, &iop_chan->chain,
-					chain_node) {
-		in_use_descs++;
-		list_del(&iter->chain_node);
-	}
-	list_for_each_entry_safe_reverse(
-		iter, _iter, &iop_chan->all_slots, slot_node) {
-		list_del(&iter->slot_node);
-		kfree(iter);
-		iop_chan->slots_allocated--;
-	}
-	iop_chan->last_used = NULL;
-
-	dev_dbg(iop_chan->device->common.dev, "%s slots_allocated %d\n",
-		__func__, iop_chan->slots_allocated);
-	spin_unlock_bh(&iop_chan->lock);
-
-	/* one is ok since we left it on there on purpose */
-	if (in_use_descs > 1)
-		printk(KERN_ERR "IOP: Freeing %d in use descriptors!\n",
-			in_use_descs - 1);
-}
-
-/**
- * iop_adma_status - poll the status of an ADMA transaction
- * @chan: ADMA channel handle
- * @cookie: ADMA transaction identifier
- * @txstate: a holder for the current state of the channel or NULL
- */
-static enum dma_status iop_adma_status(struct dma_chan *chan,
-					dma_cookie_t cookie,
-					struct dma_tx_state *txstate)
-{
-	struct iop_adma_chan *iop_chan = to_iop_adma_chan(chan);
-	int ret;
-
-	ret = dma_cookie_status(chan, cookie, txstate);
-	if (ret == DMA_COMPLETE)
-		return ret;
-
-	iop_adma_slot_cleanup(iop_chan);
-
-	return dma_cookie_status(chan, cookie, txstate);
-}
-
-static irqreturn_t iop_adma_eot_handler(int irq, void *data)
-{
-	struct iop_adma_chan *chan = data;
-
-	dev_dbg(chan->device->common.dev, "%s\n", __func__);
-
-	tasklet_schedule(&chan->irq_tasklet);
-
-	iop_adma_device_clear_eot_status(chan);
-
-	return IRQ_HANDLED;
-}
-
-static irqreturn_t iop_adma_eoc_handler(int irq, void *data)
-{
-	struct iop_adma_chan *chan = data;
-
-	dev_dbg(chan->device->common.dev, "%s\n", __func__);
-
-	tasklet_schedule(&chan->irq_tasklet);
-
-	iop_adma_device_clear_eoc_status(chan);
-
-	return IRQ_HANDLED;
-}
-
-static irqreturn_t iop_adma_err_handler(int irq, void *data)
-{
-	struct iop_adma_chan *chan = data;
-	unsigned long status = iop_chan_get_status(chan);
-
-	dev_err(chan->device->common.dev,
-		"error ( %s%s%s%s%s%s%s)\n",
-		iop_is_err_int_parity(status, chan) ? "int_parity " : "",
-		iop_is_err_mcu_abort(status, chan) ? "mcu_abort " : "",
-		iop_is_err_int_tabort(status, chan) ? "int_tabort " : "",
-		iop_is_err_int_mabort(status, chan) ? "int_mabort " : "",
-		iop_is_err_pci_tabort(status, chan) ? "pci_tabort " : "",
-		iop_is_err_pci_mabort(status, chan) ? "pci_mabort " : "",
-		iop_is_err_split_tx(status, chan) ? "split_tx " : "");
-
-	iop_adma_device_clear_err_status(chan);
-
-	BUG();
-
-	return IRQ_HANDLED;
-}
-
-static void iop_adma_issue_pending(struct dma_chan *chan)
-{
-	struct iop_adma_chan *iop_chan = to_iop_adma_chan(chan);
-
-	if (iop_chan->pending) {
-		iop_chan->pending = 0;
-		iop_chan_append(iop_chan);
-	}
-}
-
-/*
- * Perform a transaction to verify the HW works.
- */
-#define IOP_ADMA_TEST_SIZE 2000
-
-static int iop_adma_memcpy_self_test(struct iop_adma_device *device)
-{
-	int i;
-	void *src, *dest;
-	dma_addr_t src_dma, dest_dma;
-	struct dma_chan *dma_chan;
-	dma_cookie_t cookie;
-	struct dma_async_tx_descriptor *tx;
-	int err = 0;
-	struct iop_adma_chan *iop_chan;
-
-	dev_dbg(device->common.dev, "%s\n", __func__);
-
-	src = kmalloc(IOP_ADMA_TEST_SIZE, GFP_KERNEL);
-	if (!src)
-		return -ENOMEM;
-	dest = kzalloc(IOP_ADMA_TEST_SIZE, GFP_KERNEL);
-	if (!dest) {
-		kfree(src);
-		return -ENOMEM;
-	}
-
-	/* Fill in src buffer */
-	for (i = 0; i < IOP_ADMA_TEST_SIZE; i++)
-		((u8 *) src)[i] = (u8)i;
-
-	/* Start copy, using first DMA channel */
-	dma_chan = container_of(device->common.channels.next,
-				struct dma_chan,
-				device_node);
-	if (iop_adma_alloc_chan_resources(dma_chan) < 1) {
-		err = -ENODEV;
-		goto out;
-	}
-
-	dest_dma = dma_map_single(dma_chan->device->dev, dest,
-				IOP_ADMA_TEST_SIZE, DMA_FROM_DEVICE);
-	src_dma = dma_map_single(dma_chan->device->dev, src,
-				IOP_ADMA_TEST_SIZE, DMA_TO_DEVICE);
-	tx = iop_adma_prep_dma_memcpy(dma_chan, dest_dma, src_dma,
-				      IOP_ADMA_TEST_SIZE,
-				      DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
-
-	cookie = iop_adma_tx_submit(tx);
-	iop_adma_issue_pending(dma_chan);
-	msleep(1);
-
-	if (iop_adma_status(dma_chan, cookie, NULL) !=
-			DMA_COMPLETE) {
-		dev_err(dma_chan->device->dev,
-			"Self-test copy timed out, disabling\n");
-		err = -ENODEV;
-		goto free_resources;
-	}
-
-	iop_chan = to_iop_adma_chan(dma_chan);
-	dma_sync_single_for_cpu(&iop_chan->device->pdev->dev, dest_dma,
-		IOP_ADMA_TEST_SIZE, DMA_FROM_DEVICE);
-	if (memcmp(src, dest, IOP_ADMA_TEST_SIZE)) {
-		dev_err(dma_chan->device->dev,
-			"Self-test copy failed compare, disabling\n");
-		err = -ENODEV;
-		goto free_resources;
-	}
-
-free_resources:
-	iop_adma_free_chan_resources(dma_chan);
-out:
-	kfree(src);
-	kfree(dest);
-	return err;
-}
-
-#define IOP_ADMA_NUM_SRC_TEST 4 /* must be <= 15 */
-static int
-iop_adma_xor_val_self_test(struct iop_adma_device *device)
-{
-	int i, src_idx;
-	struct page *dest;
-	struct page *xor_srcs[IOP_ADMA_NUM_SRC_TEST];
-	struct page *zero_sum_srcs[IOP_ADMA_NUM_SRC_TEST + 1];
-	dma_addr_t dma_srcs[IOP_ADMA_NUM_SRC_TEST + 1];
-	dma_addr_t dest_dma;
-	struct dma_async_tx_descriptor *tx;
-	struct dma_chan *dma_chan;
-	dma_cookie_t cookie;
-	u8 cmp_byte = 0;
-	u32 cmp_word;
-	u32 zero_sum_result;
-	int err = 0;
-	struct iop_adma_chan *iop_chan;
-
-	dev_dbg(device->common.dev, "%s\n", __func__);
-
-	for (src_idx = 0; src_idx < IOP_ADMA_NUM_SRC_TEST; src_idx++) {
-		xor_srcs[src_idx] = alloc_page(GFP_KERNEL);
-		if (!xor_srcs[src_idx]) {
-			while (src_idx--)
-				__free_page(xor_srcs[src_idx]);
-			return -ENOMEM;
-		}
-	}
-
-	dest = alloc_page(GFP_KERNEL);
-	if (!dest) {
-		while (src_idx--)
-			__free_page(xor_srcs[src_idx]);
-		return -ENOMEM;
-	}
-
-	/* Fill in src buffers */
-	for (src_idx = 0; src_idx < IOP_ADMA_NUM_SRC_TEST; src_idx++) {
-		u8 *ptr = page_address(xor_srcs[src_idx]);
-		for (i = 0; i < PAGE_SIZE; i++)
-			ptr[i] = (1 << src_idx);
-	}
-
-	for (src_idx = 0; src_idx < IOP_ADMA_NUM_SRC_TEST; src_idx++)
-		cmp_byte ^= (u8) (1 << src_idx);
-
-	cmp_word = (cmp_byte << 24) | (cmp_byte << 16) |
-			(cmp_byte << 8) | cmp_byte;
-
-	memset(page_address(dest), 0, PAGE_SIZE);
-
-	dma_chan = container_of(device->common.channels.next,
-				struct dma_chan,
-				device_node);
-	if (iop_adma_alloc_chan_resources(dma_chan) < 1) {
-		err = -ENODEV;
-		goto out;
-	}
-
-	/* test xor */
-	dest_dma = dma_map_page(dma_chan->device->dev, dest, 0,
-				PAGE_SIZE, DMA_FROM_DEVICE);
-	for (i = 0; i < IOP_ADMA_NUM_SRC_TEST; i++)
-		dma_srcs[i] = dma_map_page(dma_chan->device->dev, xor_srcs[i],
-					   0, PAGE_SIZE, DMA_TO_DEVICE);
-	tx = iop_adma_prep_dma_xor(dma_chan, dest_dma, dma_srcs,
-				   IOP_ADMA_NUM_SRC_TEST, PAGE_SIZE,
-				   DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
-
-	cookie = iop_adma_tx_submit(tx);
-	iop_adma_issue_pending(dma_chan);
-	msleep(8);
-
-	if (iop_adma_status(dma_chan, cookie, NULL) !=
-		DMA_COMPLETE) {
-		dev_err(dma_chan->device->dev,
-			"Self-test xor timed out, disabling\n");
-		err = -ENODEV;
-		goto free_resources;
-	}
-
-	iop_chan = to_iop_adma_chan(dma_chan);
-	dma_sync_single_for_cpu(&iop_chan->device->pdev->dev, dest_dma,
-		PAGE_SIZE, DMA_FROM_DEVICE);
-	for (i = 0; i < (PAGE_SIZE / sizeof(u32)); i++) {
-		u32 *ptr = page_address(dest);
-		if (ptr[i] != cmp_word) {
-			dev_err(dma_chan->device->dev,
-				"Self-test xor failed compare, disabling\n");
-			err = -ENODEV;
-			goto free_resources;
-		}
-	}
-	dma_sync_single_for_device(&iop_chan->device->pdev->dev, dest_dma,
-		PAGE_SIZE, DMA_TO_DEVICE);
-
-	/* skip zero sum if the capability is not present */
-	if (!dma_has_cap(DMA_XOR_VAL, dma_chan->device->cap_mask))
-		goto free_resources;
-
-	/* zero sum the sources with the destintation page */
-	for (i = 0; i < IOP_ADMA_NUM_SRC_TEST; i++)
-		zero_sum_srcs[i] = xor_srcs[i];
-	zero_sum_srcs[i] = dest;
-
-	zero_sum_result = 1;
-
-	for (i = 0; i < IOP_ADMA_NUM_SRC_TEST + 1; i++)
-		dma_srcs[i] = dma_map_page(dma_chan->device->dev,
-					   zero_sum_srcs[i], 0, PAGE_SIZE,
-					   DMA_TO_DEVICE);
-	tx = iop_adma_prep_dma_xor_val(dma_chan, dma_srcs,
-				       IOP_ADMA_NUM_SRC_TEST + 1, PAGE_SIZE,
-				       &zero_sum_result,
-				       DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
-
-	cookie = iop_adma_tx_submit(tx);
-	iop_adma_issue_pending(dma_chan);
-	msleep(8);
-
-	if (iop_adma_status(dma_chan, cookie, NULL) != DMA_COMPLETE) {
-		dev_err(dma_chan->device->dev,
-			"Self-test zero sum timed out, disabling\n");
-		err = -ENODEV;
-		goto free_resources;
-	}
-
-	if (zero_sum_result != 0) {
-		dev_err(dma_chan->device->dev,
-			"Self-test zero sum failed compare, disabling\n");
-		err = -ENODEV;
-		goto free_resources;
-	}
-
-	/* test for non-zero parity sum */
-	zero_sum_result = 0;
-	for (i = 0; i < IOP_ADMA_NUM_SRC_TEST + 1; i++)
-		dma_srcs[i] = dma_map_page(dma_chan->device->dev,
-					   zero_sum_srcs[i], 0, PAGE_SIZE,
-					   DMA_TO_DEVICE);
-	tx = iop_adma_prep_dma_xor_val(dma_chan, dma_srcs,
-				       IOP_ADMA_NUM_SRC_TEST + 1, PAGE_SIZE,
-				       &zero_sum_result,
-				       DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
-
-	cookie = iop_adma_tx_submit(tx);
-	iop_adma_issue_pending(dma_chan);
-	msleep(8);
-
-	if (iop_adma_status(dma_chan, cookie, NULL) != DMA_COMPLETE) {
-		dev_err(dma_chan->device->dev,
-			"Self-test non-zero sum timed out, disabling\n");
-		err = -ENODEV;
-		goto free_resources;
-	}
-
-	if (zero_sum_result != 1) {
-		dev_err(dma_chan->device->dev,
-			"Self-test non-zero sum failed compare, disabling\n");
-		err = -ENODEV;
-		goto free_resources;
-	}
-
-free_resources:
-	iop_adma_free_chan_resources(dma_chan);
-out:
-	src_idx = IOP_ADMA_NUM_SRC_TEST;
-	while (src_idx--)
-		__free_page(xor_srcs[src_idx]);
-	__free_page(dest);
-	return err;
-}
-
-#ifdef CONFIG_RAID6_PQ
-static int
-iop_adma_pq_zero_sum_self_test(struct iop_adma_device *device)
-{
-	/* combined sources, software pq results, and extra hw pq results */
-	struct page *pq[IOP_ADMA_NUM_SRC_TEST+2+2];
-	/* ptr to the extra hw pq buffers defined above */
-	struct page **pq_hw = &pq[IOP_ADMA_NUM_SRC_TEST+2];
-	/* address conversion buffers (dma_map / page_address) */
-	void *pq_sw[IOP_ADMA_NUM_SRC_TEST+2];
-	dma_addr_t pq_src[IOP_ADMA_NUM_SRC_TEST+2];
-	dma_addr_t *pq_dest = &pq_src[IOP_ADMA_NUM_SRC_TEST];
-
-	int i;
-	struct dma_async_tx_descriptor *tx;
-	struct dma_chan *dma_chan;
-	dma_cookie_t cookie;
-	u32 zero_sum_result;
-	int err = 0;
-	struct device *dev;
-
-	dev_dbg(device->common.dev, "%s\n", __func__);
-
-	for (i = 0; i < ARRAY_SIZE(pq); i++) {
-		pq[i] = alloc_page(GFP_KERNEL);
-		if (!pq[i]) {
-			while (i--)
-				__free_page(pq[i]);
-			return -ENOMEM;
-		}
-	}
-
-	/* Fill in src buffers */
-	for (i = 0; i < IOP_ADMA_NUM_SRC_TEST; i++) {
-		pq_sw[i] = page_address(pq[i]);
-		memset(pq_sw[i], 0x11111111 * (1<<i), PAGE_SIZE);
-	}
-	pq_sw[i] = page_address(pq[i]);
-	pq_sw[i+1] = page_address(pq[i+1]);
-
-	dma_chan = container_of(device->common.channels.next,
-				struct dma_chan,
-				device_node);
-	if (iop_adma_alloc_chan_resources(dma_chan) < 1) {
-		err = -ENODEV;
-		goto out;
-	}
-
-	dev = dma_chan->device->dev;
-
-	/* initialize the dests */
-	memset(page_address(pq_hw[0]), 0 , PAGE_SIZE);
-	memset(page_address(pq_hw[1]), 0 , PAGE_SIZE);
-
-	/* test pq */
-	pq_dest[0] = dma_map_page(dev, pq_hw[0], 0, PAGE_SIZE, DMA_FROM_DEVICE);
-	pq_dest[1] = dma_map_page(dev, pq_hw[1], 0, PAGE_SIZE, DMA_FROM_DEVICE);
-	for (i = 0; i < IOP_ADMA_NUM_SRC_TEST; i++)
-		pq_src[i] = dma_map_page(dev, pq[i], 0, PAGE_SIZE,
-					 DMA_TO_DEVICE);
-
-	tx = iop_adma_prep_dma_pq(dma_chan, pq_dest, pq_src,
-				  IOP_ADMA_NUM_SRC_TEST, (u8 *)raid6_gfexp,
-				  PAGE_SIZE,
-				  DMA_PREP_INTERRUPT |
-				  DMA_CTRL_ACK);
-
-	cookie = iop_adma_tx_submit(tx);
-	iop_adma_issue_pending(dma_chan);
-	msleep(8);
-
-	if (iop_adma_status(dma_chan, cookie, NULL) !=
-		DMA_COMPLETE) {
-		dev_err(dev, "Self-test pq timed out, disabling\n");
-		err = -ENODEV;
-		goto free_resources;
-	}
-
-	raid6_call.gen_syndrome(IOP_ADMA_NUM_SRC_TEST+2, PAGE_SIZE, pq_sw);
-
-	if (memcmp(pq_sw[IOP_ADMA_NUM_SRC_TEST],
-		   page_address(pq_hw[0]), PAGE_SIZE) != 0) {
-		dev_err(dev, "Self-test p failed compare, disabling\n");
-		err = -ENODEV;
-		goto free_resources;
-	}
-	if (memcmp(pq_sw[IOP_ADMA_NUM_SRC_TEST+1],
-		   page_address(pq_hw[1]), PAGE_SIZE) != 0) {
-		dev_err(dev, "Self-test q failed compare, disabling\n");
-		err = -ENODEV;
-		goto free_resources;
-	}
-
-	/* test correct zero sum using the software generated pq values */
-	for (i = 0; i < IOP_ADMA_NUM_SRC_TEST + 2; i++)
-		pq_src[i] = dma_map_page(dev, pq[i], 0, PAGE_SIZE,
-					 DMA_TO_DEVICE);
-
-	zero_sum_result = ~0;
-	tx = iop_adma_prep_dma_pq_val(dma_chan, &pq_src[IOP_ADMA_NUM_SRC_TEST],
-				      pq_src, IOP_ADMA_NUM_SRC_TEST,
-				      raid6_gfexp, PAGE_SIZE, &zero_sum_result,
-				      DMA_PREP_INTERRUPT|DMA_CTRL_ACK);
-
-	cookie = iop_adma_tx_submit(tx);
-	iop_adma_issue_pending(dma_chan);
-	msleep(8);
-
-	if (iop_adma_status(dma_chan, cookie, NULL) !=
-		DMA_COMPLETE) {
-		dev_err(dev, "Self-test pq-zero-sum timed out, disabling\n");
-		err = -ENODEV;
-		goto free_resources;
-	}
-
-	if (zero_sum_result != 0) {
-		dev_err(dev, "Self-test pq-zero-sum failed to validate: %x\n",
-			zero_sum_result);
-		err = -ENODEV;
-		goto free_resources;
-	}
-
-	/* test incorrect zero sum */
-	i = IOP_ADMA_NUM_SRC_TEST;
-	memset(pq_sw[i] + 100, 0, 100);
-	memset(pq_sw[i+1] + 200, 0, 200);
-	for (i = 0; i < IOP_ADMA_NUM_SRC_TEST + 2; i++)
-		pq_src[i] = dma_map_page(dev, pq[i], 0, PAGE_SIZE,
-					 DMA_TO_DEVICE);
-
-	zero_sum_result = 0;
-	tx = iop_adma_prep_dma_pq_val(dma_chan, &pq_src[IOP_ADMA_NUM_SRC_TEST],
-				      pq_src, IOP_ADMA_NUM_SRC_TEST,
-				      raid6_gfexp, PAGE_SIZE, &zero_sum_result,
-				      DMA_PREP_INTERRUPT|DMA_CTRL_ACK);
-
-	cookie = iop_adma_tx_submit(tx);
-	iop_adma_issue_pending(dma_chan);
-	msleep(8);
-
-	if (iop_adma_status(dma_chan, cookie, NULL) !=
-		DMA_COMPLETE) {
-		dev_err(dev, "Self-test !pq-zero-sum timed out, disabling\n");
-		err = -ENODEV;
-		goto free_resources;
-	}
-
-	if (zero_sum_result != (SUM_CHECK_P_RESULT | SUM_CHECK_Q_RESULT)) {
-		dev_err(dev, "Self-test !pq-zero-sum failed to validate: %x\n",
-			zero_sum_result);
-		err = -ENODEV;
-		goto free_resources;
-	}
-
-free_resources:
-	iop_adma_free_chan_resources(dma_chan);
-out:
-	i = ARRAY_SIZE(pq);
-	while (i--)
-		__free_page(pq[i]);
-	return err;
-}
-#endif
-
-static int iop_adma_remove(struct platform_device *dev)
-{
-	struct iop_adma_device *device = platform_get_drvdata(dev);
-	struct dma_chan *chan, *_chan;
-	struct iop_adma_chan *iop_chan;
-	struct iop_adma_platform_data *plat_data = dev_get_platdata(&dev->dev);
-
-	dma_async_device_unregister(&device->common);
-
-	dma_free_coherent(&dev->dev, plat_data->pool_size,
-			device->dma_desc_pool_virt, device->dma_desc_pool);
-
-	list_for_each_entry_safe(chan, _chan, &device->common.channels,
-				device_node) {
-		iop_chan = to_iop_adma_chan(chan);
-		list_del(&chan->device_node);
-		kfree(iop_chan);
-	}
-	kfree(device);
-
-	return 0;
-}
-
-static int iop_adma_probe(struct platform_device *pdev)
-{
-	struct resource *res;
-	int ret = 0, i;
-	struct iop_adma_device *adev;
-	struct iop_adma_chan *iop_chan;
-	struct dma_device *dma_dev;
-	struct iop_adma_platform_data *plat_data = dev_get_platdata(&pdev->dev);
-
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res)
-		return -ENODEV;
-
-	if (!devm_request_mem_region(&pdev->dev, res->start,
-				resource_size(res), pdev->name))
-		return -EBUSY;
-
-	adev = kzalloc(sizeof(*adev), GFP_KERNEL);
-	if (!adev)
-		return -ENOMEM;
-	dma_dev = &adev->common;
-
-	/* allocate coherent memory for hardware descriptors
-	 * note: writecombine gives slightly better performance, but
-	 * requires that we explicitly flush the writes
-	 */
-	adev->dma_desc_pool_virt = dma_alloc_wc(&pdev->dev,
-						plat_data->pool_size,
-						&adev->dma_desc_pool,
-						GFP_KERNEL);
-	if (!adev->dma_desc_pool_virt) {
-		ret = -ENOMEM;
-		goto err_free_adev;
-	}
-
-	dev_dbg(&pdev->dev, "%s: allocated descriptor pool virt %p phys %pad\n",
-		__func__, adev->dma_desc_pool_virt, &adev->dma_desc_pool);
-
-	adev->id = plat_data->hw_id;
-
-	/* discover transaction capabilites from the platform data */
-	dma_dev->cap_mask = plat_data->cap_mask;
-
-	adev->pdev = pdev;
-	platform_set_drvdata(pdev, adev);
-
-	INIT_LIST_HEAD(&dma_dev->channels);
-
-	/* set base routines */
-	dma_dev->device_alloc_chan_resources = iop_adma_alloc_chan_resources;
-	dma_dev->device_free_chan_resources = iop_adma_free_chan_resources;
-	dma_dev->device_tx_status = iop_adma_status;
-	dma_dev->device_issue_pending = iop_adma_issue_pending;
-	dma_dev->dev = &pdev->dev;
-
-	/* set prep routines based on capability */
-	if (dma_has_cap(DMA_MEMCPY, dma_dev->cap_mask))
-		dma_dev->device_prep_dma_memcpy = iop_adma_prep_dma_memcpy;
-	if (dma_has_cap(DMA_XOR, dma_dev->cap_mask)) {
-		dma_dev->max_xor = iop_adma_get_max_xor();
-		dma_dev->device_prep_dma_xor = iop_adma_prep_dma_xor;
-	}
-	if (dma_has_cap(DMA_XOR_VAL, dma_dev->cap_mask))
-		dma_dev->device_prep_dma_xor_val =
-			iop_adma_prep_dma_xor_val;
-	if (dma_has_cap(DMA_PQ, dma_dev->cap_mask)) {
-		dma_set_maxpq(dma_dev, iop_adma_get_max_pq(), 0);
-		dma_dev->device_prep_dma_pq = iop_adma_prep_dma_pq;
-	}
-	if (dma_has_cap(DMA_PQ_VAL, dma_dev->cap_mask))
-		dma_dev->device_prep_dma_pq_val =
-			iop_adma_prep_dma_pq_val;
-	if (dma_has_cap(DMA_INTERRUPT, dma_dev->cap_mask))
-		dma_dev->device_prep_dma_interrupt =
-			iop_adma_prep_dma_interrupt;
-
-	iop_chan = kzalloc(sizeof(*iop_chan), GFP_KERNEL);
-	if (!iop_chan) {
-		ret = -ENOMEM;
-		goto err_free_dma;
-	}
-	iop_chan->device = adev;
-
-	iop_chan->mmr_base = devm_ioremap(&pdev->dev, res->start,
-					resource_size(res));
-	if (!iop_chan->mmr_base) {
-		ret = -ENOMEM;
-		goto err_free_iop_chan;
-	}
-	tasklet_setup(&iop_chan->irq_tasklet, iop_adma_tasklet);
-
-	/* clear errors before enabling interrupts */
-	iop_adma_device_clear_err_status(iop_chan);
-
-	for (i = 0; i < 3; i++) {
-		static const irq_handler_t handler[] = {
-			iop_adma_eot_handler,
-			iop_adma_eoc_handler,
-			iop_adma_err_handler
-		};
-		int irq = platform_get_irq(pdev, i);
-		if (irq < 0) {
-			ret = -ENXIO;
-			goto err_free_iop_chan;
-		} else {
-			ret = devm_request_irq(&pdev->dev, irq,
-					handler[i], 0, pdev->name, iop_chan);
-			if (ret)
-				goto err_free_iop_chan;
-		}
-	}
-
-	spin_lock_init(&iop_chan->lock);
-	INIT_LIST_HEAD(&iop_chan->chain);
-	INIT_LIST_HEAD(&iop_chan->all_slots);
-	iop_chan->common.device = dma_dev;
-	dma_cookie_init(&iop_chan->common);
-	list_add_tail(&iop_chan->common.device_node, &dma_dev->channels);
-
-	if (dma_has_cap(DMA_MEMCPY, dma_dev->cap_mask)) {
-		ret = iop_adma_memcpy_self_test(adev);
-		dev_dbg(&pdev->dev, "memcpy self test returned %d\n", ret);
-		if (ret)
-			goto err_free_iop_chan;
-	}
-
-	if (dma_has_cap(DMA_XOR, dma_dev->cap_mask)) {
-		ret = iop_adma_xor_val_self_test(adev);
-		dev_dbg(&pdev->dev, "xor self test returned %d\n", ret);
-		if (ret)
-			goto err_free_iop_chan;
-	}
-
-	if (dma_has_cap(DMA_PQ, dma_dev->cap_mask) &&
-	    dma_has_cap(DMA_PQ_VAL, dma_dev->cap_mask)) {
-		#ifdef CONFIG_RAID6_PQ
-		ret = iop_adma_pq_zero_sum_self_test(adev);
-		dev_dbg(&pdev->dev, "pq self test returned %d\n", ret);
-		#else
-		/* can not test raid6, so do not publish capability */
-		dma_cap_clear(DMA_PQ, dma_dev->cap_mask);
-		dma_cap_clear(DMA_PQ_VAL, dma_dev->cap_mask);
-		ret = 0;
-		#endif
-		if (ret)
-			goto err_free_iop_chan;
-	}
-
-	dev_info(&pdev->dev, "Intel(R) IOP: ( %s%s%s%s%s%s)\n",
-		 dma_has_cap(DMA_PQ, dma_dev->cap_mask) ? "pq " : "",
-		 dma_has_cap(DMA_PQ_VAL, dma_dev->cap_mask) ? "pq_val " : "",
-		 dma_has_cap(DMA_XOR, dma_dev->cap_mask) ? "xor " : "",
-		 dma_has_cap(DMA_XOR_VAL, dma_dev->cap_mask) ? "xor_val " : "",
-		 dma_has_cap(DMA_MEMCPY, dma_dev->cap_mask) ? "cpy " : "",
-		 dma_has_cap(DMA_INTERRUPT, dma_dev->cap_mask) ? "intr " : "");
-
-	dma_async_device_register(dma_dev);
-	goto out;
-
- err_free_iop_chan:
-	kfree(iop_chan);
- err_free_dma:
-	dma_free_coherent(&adev->pdev->dev, plat_data->pool_size,
-			adev->dma_desc_pool_virt, adev->dma_desc_pool);
- err_free_adev:
-	kfree(adev);
- out:
-	return ret;
-}
-
-static void iop_chan_start_null_memcpy(struct iop_adma_chan *iop_chan)
-{
-	struct iop_adma_desc_slot *sw_desc, *grp_start;
-	dma_cookie_t cookie;
-	int slot_cnt, slots_per_op;
-
-	dev_dbg(iop_chan->device->common.dev, "%s\n", __func__);
-
-	spin_lock_bh(&iop_chan->lock);
-	slot_cnt = iop_chan_memcpy_slot_count(0, &slots_per_op);
-	sw_desc = iop_adma_alloc_slots(iop_chan, slot_cnt, slots_per_op);
-	if (sw_desc) {
-		grp_start = sw_desc->group_head;
-
-		list_splice_init(&sw_desc->tx_list, &iop_chan->chain);
-		async_tx_ack(&sw_desc->async_tx);
-		iop_desc_init_memcpy(grp_start, 0);
-		iop_desc_set_byte_count(grp_start, iop_chan, 0);
-		iop_desc_set_dest_addr(grp_start, iop_chan, 0);
-		iop_desc_set_memcpy_src_addr(grp_start, 0);
-
-		cookie = dma_cookie_assign(&sw_desc->async_tx);
-
-		/* initialize the completed cookie to be less than
-		 * the most recently used cookie
-		 */
-		iop_chan->common.completed_cookie = cookie - 1;
-
-		/* channel should not be busy */
-		BUG_ON(iop_chan_is_busy(iop_chan));
-
-		/* clear any prior error-status bits */
-		iop_adma_device_clear_err_status(iop_chan);
-
-		/* disable operation */
-		iop_chan_disable(iop_chan);
-
-		/* set the descriptor address */
-		iop_chan_set_next_descriptor(iop_chan, sw_desc->async_tx.phys);
-
-		/* 1/ don't add pre-chained descriptors
-		 * 2/ dummy read to flush next_desc write
-		 */
-		BUG_ON(iop_desc_get_next_desc(sw_desc));
-
-		/* run the descriptor */
-		iop_chan_enable(iop_chan);
-	} else
-		dev_err(iop_chan->device->common.dev,
-			"failed to allocate null descriptor\n");
-	spin_unlock_bh(&iop_chan->lock);
-}
-
-static void iop_chan_start_null_xor(struct iop_adma_chan *iop_chan)
-{
-	struct iop_adma_desc_slot *sw_desc, *grp_start;
-	dma_cookie_t cookie;
-	int slot_cnt, slots_per_op;
-
-	dev_dbg(iop_chan->device->common.dev, "%s\n", __func__);
-
-	spin_lock_bh(&iop_chan->lock);
-	slot_cnt = iop_chan_xor_slot_count(0, 2, &slots_per_op);
-	sw_desc = iop_adma_alloc_slots(iop_chan, slot_cnt, slots_per_op);
-	if (sw_desc) {
-		grp_start = sw_desc->group_head;
-		list_splice_init(&sw_desc->tx_list, &iop_chan->chain);
-		async_tx_ack(&sw_desc->async_tx);
-		iop_desc_init_null_xor(grp_start, 2, 0);
-		iop_desc_set_byte_count(grp_start, iop_chan, 0);
-		iop_desc_set_dest_addr(grp_start, iop_chan, 0);
-		iop_desc_set_xor_src_addr(grp_start, 0, 0);
-		iop_desc_set_xor_src_addr(grp_start, 1, 0);
-
-		cookie = dma_cookie_assign(&sw_desc->async_tx);
-
-		/* initialize the completed cookie to be less than
-		 * the most recently used cookie
-		 */
-		iop_chan->common.completed_cookie = cookie - 1;
-
-		/* channel should not be busy */
-		BUG_ON(iop_chan_is_busy(iop_chan));
-
-		/* clear any prior error-status bits */
-		iop_adma_device_clear_err_status(iop_chan);
-
-		/* disable operation */
-		iop_chan_disable(iop_chan);
-
-		/* set the descriptor address */
-		iop_chan_set_next_descriptor(iop_chan, sw_desc->async_tx.phys);
-
-		/* 1/ don't add pre-chained descriptors
-		 * 2/ dummy read to flush next_desc write
-		 */
-		BUG_ON(iop_desc_get_next_desc(sw_desc));
-
-		/* run the descriptor */
-		iop_chan_enable(iop_chan);
-	} else
-		dev_err(iop_chan->device->common.dev,
-			"failed to allocate null descriptor\n");
-	spin_unlock_bh(&iop_chan->lock);
-}
-
-static struct platform_driver iop_adma_driver = {
-	.probe		= iop_adma_probe,
-	.remove		= iop_adma_remove,
-	.driver		= {
-		.name	= "iop-adma",
-	},
-};
-
-module_platform_driver(iop_adma_driver);
-
-MODULE_AUTHOR("Intel Corporation");
-MODULE_DESCRIPTION("IOP ADMA Engine Driver");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:iop-adma");
diff --git a/drivers/dma/iop-adma.h b/drivers/dma/iop-adma.h
deleted file mode 100644
index d44eabb6f5eb..000000000000
--- a/drivers/dma/iop-adma.h
+++ /dev/null
@@ -1,914 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Copyright © 2006, Intel Corporation.
- */
-#ifndef _ADMA_H
-#define _ADMA_H
-#include <linux/types.h>
-#include <linux/io.h>
-#include <linux/platform_data/dma-iop32x.h>
-
-/* Memory copy units */
-#define DMA_CCR(chan)		(chan->mmr_base + 0x0)
-#define DMA_CSR(chan)		(chan->mmr_base + 0x4)
-#define DMA_DAR(chan)		(chan->mmr_base + 0xc)
-#define DMA_NDAR(chan)		(chan->mmr_base + 0x10)
-#define DMA_PADR(chan)		(chan->mmr_base + 0x14)
-#define DMA_PUADR(chan)	(chan->mmr_base + 0x18)
-#define DMA_LADR(chan)		(chan->mmr_base + 0x1c)
-#define DMA_BCR(chan)		(chan->mmr_base + 0x20)
-#define DMA_DCR(chan)		(chan->mmr_base + 0x24)
-
-/* Application accelerator unit  */
-#define AAU_ACR(chan)		(chan->mmr_base + 0x0)
-#define AAU_ASR(chan)		(chan->mmr_base + 0x4)
-#define AAU_ADAR(chan)		(chan->mmr_base + 0x8)
-#define AAU_ANDAR(chan)	(chan->mmr_base + 0xc)
-#define AAU_SAR(src, chan)	(chan->mmr_base + (0x10 + ((src) << 2)))
-#define AAU_DAR(chan)		(chan->mmr_base + 0x20)
-#define AAU_ABCR(chan)		(chan->mmr_base + 0x24)
-#define AAU_ADCR(chan)		(chan->mmr_base + 0x28)
-#define AAU_SAR_EDCR(src_edc)	(chan->mmr_base + (0x02c + ((src_edc-4) << 2)))
-#define AAU_EDCR0_IDX	8
-#define AAU_EDCR1_IDX	17
-#define AAU_EDCR2_IDX	26
-
-struct iop3xx_aau_desc_ctrl {
-	unsigned int int_en:1;
-	unsigned int blk1_cmd_ctrl:3;
-	unsigned int blk2_cmd_ctrl:3;
-	unsigned int blk3_cmd_ctrl:3;
-	unsigned int blk4_cmd_ctrl:3;
-	unsigned int blk5_cmd_ctrl:3;
-	unsigned int blk6_cmd_ctrl:3;
-	unsigned int blk7_cmd_ctrl:3;
-	unsigned int blk8_cmd_ctrl:3;
-	unsigned int blk_ctrl:2;
-	unsigned int dual_xor_en:1;
-	unsigned int tx_complete:1;
-	unsigned int zero_result_err:1;
-	unsigned int zero_result_en:1;
-	unsigned int dest_write_en:1;
-};
-
-struct iop3xx_aau_e_desc_ctrl {
-	unsigned int reserved:1;
-	unsigned int blk1_cmd_ctrl:3;
-	unsigned int blk2_cmd_ctrl:3;
-	unsigned int blk3_cmd_ctrl:3;
-	unsigned int blk4_cmd_ctrl:3;
-	unsigned int blk5_cmd_ctrl:3;
-	unsigned int blk6_cmd_ctrl:3;
-	unsigned int blk7_cmd_ctrl:3;
-	unsigned int blk8_cmd_ctrl:3;
-	unsigned int reserved2:7;
-};
-
-struct iop3xx_dma_desc_ctrl {
-	unsigned int pci_transaction:4;
-	unsigned int int_en:1;
-	unsigned int dac_cycle_en:1;
-	unsigned int mem_to_mem_en:1;
-	unsigned int crc_data_tx_en:1;
-	unsigned int crc_gen_en:1;
-	unsigned int crc_seed_dis:1;
-	unsigned int reserved:21;
-	unsigned int crc_tx_complete:1;
-};
-
-struct iop3xx_desc_dma {
-	u32 next_desc;
-	union {
-		u32 pci_src_addr;
-		u32 pci_dest_addr;
-		u32 src_addr;
-	};
-	union {
-		u32 upper_pci_src_addr;
-		u32 upper_pci_dest_addr;
-	};
-	union {
-		u32 local_pci_src_addr;
-		u32 local_pci_dest_addr;
-		u32 dest_addr;
-	};
-	u32 byte_count;
-	union {
-		u32 desc_ctrl;
-		struct iop3xx_dma_desc_ctrl desc_ctrl_field;
-	};
-	u32 crc_addr;
-};
-
-struct iop3xx_desc_aau {
-	u32 next_desc;
-	u32 src[4];
-	u32 dest_addr;
-	u32 byte_count;
-	union {
-		u32 desc_ctrl;
-		struct iop3xx_aau_desc_ctrl desc_ctrl_field;
-	};
-	union {
-		u32 src_addr;
-		u32 e_desc_ctrl;
-		struct iop3xx_aau_e_desc_ctrl e_desc_ctrl_field;
-	} src_edc[31];
-};
-
-struct iop3xx_aau_gfmr {
-	unsigned int gfmr1:8;
-	unsigned int gfmr2:8;
-	unsigned int gfmr3:8;
-	unsigned int gfmr4:8;
-};
-
-struct iop3xx_desc_pq_xor {
-	u32 next_desc;
-	u32 src[3];
-	union {
-		u32 data_mult1;
-		struct iop3xx_aau_gfmr data_mult1_field;
-	};
-	u32 dest_addr;
-	u32 byte_count;
-	union {
-		u32 desc_ctrl;
-		struct iop3xx_aau_desc_ctrl desc_ctrl_field;
-	};
-	union {
-		u32 src_addr;
-		u32 e_desc_ctrl;
-		struct iop3xx_aau_e_desc_ctrl e_desc_ctrl_field;
-		u32 data_multiplier;
-		struct iop3xx_aau_gfmr data_mult_field;
-		u32 reserved;
-	} src_edc_gfmr[19];
-};
-
-struct iop3xx_desc_dual_xor {
-	u32 next_desc;
-	u32 src0_addr;
-	u32 src1_addr;
-	u32 h_src_addr;
-	u32 d_src_addr;
-	u32 h_dest_addr;
-	u32 byte_count;
-	union {
-		u32 desc_ctrl;
-		struct iop3xx_aau_desc_ctrl desc_ctrl_field;
-	};
-	u32 d_dest_addr;
-};
-
-union iop3xx_desc {
-	struct iop3xx_desc_aau *aau;
-	struct iop3xx_desc_dma *dma;
-	struct iop3xx_desc_pq_xor *pq_xor;
-	struct iop3xx_desc_dual_xor *dual_xor;
-	void *ptr;
-};
-
-/* No support for p+q operations */
-static inline int
-iop_chan_pq_slot_count(size_t len, int src_cnt, int *slots_per_op)
-{
-	BUG();
-	return 0;
-}
-
-static inline void
-iop_desc_init_pq(struct iop_adma_desc_slot *desc, int src_cnt,
-		  unsigned long flags)
-{
-	BUG();
-}
-
-static inline void
-iop_desc_set_pq_addr(struct iop_adma_desc_slot *desc, dma_addr_t *addr)
-{
-	BUG();
-}
-
-static inline void
-iop_desc_set_pq_src_addr(struct iop_adma_desc_slot *desc, int src_idx,
-			 dma_addr_t addr, unsigned char coef)
-{
-	BUG();
-}
-
-static inline int
-iop_chan_pq_zero_sum_slot_count(size_t len, int src_cnt, int *slots_per_op)
-{
-	BUG();
-	return 0;
-}
-
-static inline void
-iop_desc_init_pq_zero_sum(struct iop_adma_desc_slot *desc, int src_cnt,
-			  unsigned long flags)
-{
-	BUG();
-}
-
-static inline void
-iop_desc_set_pq_zero_sum_byte_count(struct iop_adma_desc_slot *desc, u32 len)
-{
-	BUG();
-}
-
-#define iop_desc_set_pq_zero_sum_src_addr iop_desc_set_pq_src_addr
-
-static inline void
-iop_desc_set_pq_zero_sum_addr(struct iop_adma_desc_slot *desc, int pq_idx,
-			      dma_addr_t *src)
-{
-	BUG();
-}
-
-static inline int iop_adma_get_max_xor(void)
-{
-	return 32;
-}
-
-static inline int iop_adma_get_max_pq(void)
-{
-	BUG();
-	return 0;
-}
-
-static inline u32 iop_chan_get_current_descriptor(struct iop_adma_chan *chan)
-{
-	int id = chan->device->id;
-
-	switch (id) {
-	case DMA0_ID:
-	case DMA1_ID:
-		return __raw_readl(DMA_DAR(chan));
-	case AAU_ID:
-		return __raw_readl(AAU_ADAR(chan));
-	default:
-		BUG();
-	}
-	return 0;
-}
-
-static inline void iop_chan_set_next_descriptor(struct iop_adma_chan *chan,
-						u32 next_desc_addr)
-{
-	int id = chan->device->id;
-
-	switch (id) {
-	case DMA0_ID:
-	case DMA1_ID:
-		__raw_writel(next_desc_addr, DMA_NDAR(chan));
-		break;
-	case AAU_ID:
-		__raw_writel(next_desc_addr, AAU_ANDAR(chan));
-		break;
-	}
-
-}
-
-#define IOP_ADMA_STATUS_BUSY (1 << 10)
-#define IOP_ADMA_ZERO_SUM_MAX_BYTE_COUNT (1024)
-#define IOP_ADMA_XOR_MAX_BYTE_COUNT (16 * 1024 * 1024)
-#define IOP_ADMA_MAX_BYTE_COUNT (16 * 1024 * 1024)
-
-static inline int iop_chan_is_busy(struct iop_adma_chan *chan)
-{
-	u32 status = __raw_readl(DMA_CSR(chan));
-	return (status & IOP_ADMA_STATUS_BUSY) ? 1 : 0;
-}
-
-static inline int iop_desc_is_aligned(struct iop_adma_desc_slot *desc,
-					int num_slots)
-{
-	/* num_slots will only ever be 1, 2, 4, or 8 */
-	return (desc->idx & (num_slots - 1)) ? 0 : 1;
-}
-
-/* to do: support large (i.e. > hw max) buffer sizes */
-static inline int iop_chan_memcpy_slot_count(size_t len, int *slots_per_op)
-{
-	*slots_per_op = 1;
-	return 1;
-}
-
-/* to do: support large (i.e. > hw max) buffer sizes */
-static inline int iop_chan_memset_slot_count(size_t len, int *slots_per_op)
-{
-	*slots_per_op = 1;
-	return 1;
-}
-
-static inline int iop3xx_aau_xor_slot_count(size_t len, int src_cnt,
-					int *slots_per_op)
-{
-	static const char slot_count_table[] = {
-						1, 1, 1, 1, /* 01 - 04 */
-						2, 2, 2, 2, /* 05 - 08 */
-						4, 4, 4, 4, /* 09 - 12 */
-						4, 4, 4, 4, /* 13 - 16 */
-						8, 8, 8, 8, /* 17 - 20 */
-						8, 8, 8, 8, /* 21 - 24 */
-						8, 8, 8, 8, /* 25 - 28 */
-						8, 8, 8, 8, /* 29 - 32 */
-					      };
-	*slots_per_op = slot_count_table[src_cnt - 1];
-	return *slots_per_op;
-}
-
-static inline int
-iop_chan_interrupt_slot_count(int *slots_per_op, struct iop_adma_chan *chan)
-{
-	switch (chan->device->id) {
-	case DMA0_ID:
-	case DMA1_ID:
-		return iop_chan_memcpy_slot_count(0, slots_per_op);
-	case AAU_ID:
-		return iop3xx_aau_xor_slot_count(0, 2, slots_per_op);
-	default:
-		BUG();
-	}
-	return 0;
-}
-
-static inline int iop_chan_xor_slot_count(size_t len, int src_cnt,
-						int *slots_per_op)
-{
-	int slot_cnt = iop3xx_aau_xor_slot_count(len, src_cnt, slots_per_op);
-
-	if (len <= IOP_ADMA_XOR_MAX_BYTE_COUNT)
-		return slot_cnt;
-
-	len -= IOP_ADMA_XOR_MAX_BYTE_COUNT;
-	while (len > IOP_ADMA_XOR_MAX_BYTE_COUNT) {
-		len -= IOP_ADMA_XOR_MAX_BYTE_COUNT;
-		slot_cnt += *slots_per_op;
-	}
-
-	slot_cnt += *slots_per_op;
-
-	return slot_cnt;
-}
-
-/* zero sum on iop3xx is limited to 1k at a time so it requires multiple
- * descriptors
- */
-static inline int iop_chan_zero_sum_slot_count(size_t len, int src_cnt,
-						int *slots_per_op)
-{
-	int slot_cnt = iop3xx_aau_xor_slot_count(len, src_cnt, slots_per_op);
-
-	if (len <= IOP_ADMA_ZERO_SUM_MAX_BYTE_COUNT)
-		return slot_cnt;
-
-	len -= IOP_ADMA_ZERO_SUM_MAX_BYTE_COUNT;
-	while (len > IOP_ADMA_ZERO_SUM_MAX_BYTE_COUNT) {
-		len -= IOP_ADMA_ZERO_SUM_MAX_BYTE_COUNT;
-		slot_cnt += *slots_per_op;
-	}
-
-	slot_cnt += *slots_per_op;
-
-	return slot_cnt;
-}
-
-static inline u32 iop_desc_get_byte_count(struct iop_adma_desc_slot *desc,
-					struct iop_adma_chan *chan)
-{
-	union iop3xx_desc hw_desc = { .ptr = desc->hw_desc, };
-
-	switch (chan->device->id) {
-	case DMA0_ID:
-	case DMA1_ID:
-		return hw_desc.dma->byte_count;
-	case AAU_ID:
-		return hw_desc.aau->byte_count;
-	default:
-		BUG();
-	}
-	return 0;
-}
-
-/* translate the src_idx to a descriptor word index */
-static inline int __desc_idx(int src_idx)
-{
-	static const int desc_idx_table[] = { 0, 0, 0, 0,
-					      0, 1, 2, 3,
-					      5, 6, 7, 8,
-					      9, 10, 11, 12,
-					      14, 15, 16, 17,
-					      18, 19, 20, 21,
-					      23, 24, 25, 26,
-					      27, 28, 29, 30,
-					    };
-
-	return desc_idx_table[src_idx];
-}
-
-static inline u32 iop_desc_get_src_addr(struct iop_adma_desc_slot *desc,
-					struct iop_adma_chan *chan,
-					int src_idx)
-{
-	union iop3xx_desc hw_desc = { .ptr = desc->hw_desc, };
-
-	switch (chan->device->id) {
-	case DMA0_ID:
-	case DMA1_ID:
-		return hw_desc.dma->src_addr;
-	case AAU_ID:
-		break;
-	default:
-		BUG();
-	}
-
-	if (src_idx < 4)
-		return hw_desc.aau->src[src_idx];
-	else
-		return hw_desc.aau->src_edc[__desc_idx(src_idx)].src_addr;
-}
-
-static inline void iop3xx_aau_desc_set_src_addr(struct iop3xx_desc_aau *hw_desc,
-					int src_idx, dma_addr_t addr)
-{
-	if (src_idx < 4)
-		hw_desc->src[src_idx] = addr;
-	else
-		hw_desc->src_edc[__desc_idx(src_idx)].src_addr = addr;
-}
-
-static inline void
-iop_desc_init_memcpy(struct iop_adma_desc_slot *desc, unsigned long flags)
-{
-	struct iop3xx_desc_dma *hw_desc = desc->hw_desc;
-	union {
-		u32 value;
-		struct iop3xx_dma_desc_ctrl field;
-	} u_desc_ctrl;
-
-	u_desc_ctrl.value = 0;
-	u_desc_ctrl.field.mem_to_mem_en = 1;
-	u_desc_ctrl.field.pci_transaction = 0xe; /* memory read block */
-	u_desc_ctrl.field.int_en = flags & DMA_PREP_INTERRUPT;
-	hw_desc->desc_ctrl = u_desc_ctrl.value;
-	hw_desc->upper_pci_src_addr = 0;
-	hw_desc->crc_addr = 0;
-}
-
-static inline void
-iop_desc_init_memset(struct iop_adma_desc_slot *desc, unsigned long flags)
-{
-	struct iop3xx_desc_aau *hw_desc = desc->hw_desc;
-	union {
-		u32 value;
-		struct iop3xx_aau_desc_ctrl field;
-	} u_desc_ctrl;
-
-	u_desc_ctrl.value = 0;
-	u_desc_ctrl.field.blk1_cmd_ctrl = 0x2; /* memory block fill */
-	u_desc_ctrl.field.dest_write_en = 1;
-	u_desc_ctrl.field.int_en = flags & DMA_PREP_INTERRUPT;
-	hw_desc->desc_ctrl = u_desc_ctrl.value;
-}
-
-static inline u32
-iop3xx_desc_init_xor(struct iop3xx_desc_aau *hw_desc, int src_cnt,
-		     unsigned long flags)
-{
-	int i, shift;
-	u32 edcr;
-	union {
-		u32 value;
-		struct iop3xx_aau_desc_ctrl field;
-	} u_desc_ctrl;
-
-	u_desc_ctrl.value = 0;
-	switch (src_cnt) {
-	case 25 ... 32:
-		u_desc_ctrl.field.blk_ctrl = 0x3; /* use EDCR[2:0] */
-		edcr = 0;
-		shift = 1;
-		for (i = 24; i < src_cnt; i++) {
-			edcr |= (1 << shift);
-			shift += 3;
-		}
-		hw_desc->src_edc[AAU_EDCR2_IDX].e_desc_ctrl = edcr;
-		src_cnt = 24;
-		fallthrough;
-	case 17 ... 24:
-		if (!u_desc_ctrl.field.blk_ctrl) {
-			hw_desc->src_edc[AAU_EDCR2_IDX].e_desc_ctrl = 0;
-			u_desc_ctrl.field.blk_ctrl = 0x3; /* use EDCR[2:0] */
-		}
-		edcr = 0;
-		shift = 1;
-		for (i = 16; i < src_cnt; i++) {
-			edcr |= (1 << shift);
-			shift += 3;
-		}
-		hw_desc->src_edc[AAU_EDCR1_IDX].e_desc_ctrl = edcr;
-		src_cnt = 16;
-		fallthrough;
-	case 9 ... 16:
-		if (!u_desc_ctrl.field.blk_ctrl)
-			u_desc_ctrl.field.blk_ctrl = 0x2; /* use EDCR0 */
-		edcr = 0;
-		shift = 1;
-		for (i = 8; i < src_cnt; i++) {
-			edcr |= (1 << shift);
-			shift += 3;
-		}
-		hw_desc->src_edc[AAU_EDCR0_IDX].e_desc_ctrl = edcr;
-		src_cnt = 8;
-		fallthrough;
-	case 2 ... 8:
-		shift = 1;
-		for (i = 0; i < src_cnt; i++) {
-			u_desc_ctrl.value |= (1 << shift);
-			shift += 3;
-		}
-
-		if (!u_desc_ctrl.field.blk_ctrl && src_cnt > 4)
-			u_desc_ctrl.field.blk_ctrl = 0x1; /* use mini-desc */
-	}
-
-	u_desc_ctrl.field.dest_write_en = 1;
-	u_desc_ctrl.field.blk1_cmd_ctrl = 0x7; /* direct fill */
-	u_desc_ctrl.field.int_en = flags & DMA_PREP_INTERRUPT;
-	hw_desc->desc_ctrl = u_desc_ctrl.value;
-
-	return u_desc_ctrl.value;
-}
-
-static inline void
-iop_desc_init_xor(struct iop_adma_desc_slot *desc, int src_cnt,
-		  unsigned long flags)
-{
-	iop3xx_desc_init_xor(desc->hw_desc, src_cnt, flags);
-}
-
-/* return the number of operations */
-static inline int
-iop_desc_init_zero_sum(struct iop_adma_desc_slot *desc, int src_cnt,
-		       unsigned long flags)
-{
-	int slot_cnt = desc->slot_cnt, slots_per_op = desc->slots_per_op;
-	struct iop3xx_desc_aau *hw_desc, *prev_hw_desc, *iter;
-	union {
-		u32 value;
-		struct iop3xx_aau_desc_ctrl field;
-	} u_desc_ctrl;
-	int i, j;
-
-	hw_desc = desc->hw_desc;
-
-	for (i = 0, j = 0; (slot_cnt -= slots_per_op) >= 0;
-		i += slots_per_op, j++) {
-		iter = iop_hw_desc_slot_idx(hw_desc, i);
-		u_desc_ctrl.value = iop3xx_desc_init_xor(iter, src_cnt, flags);
-		u_desc_ctrl.field.dest_write_en = 0;
-		u_desc_ctrl.field.zero_result_en = 1;
-		u_desc_ctrl.field.int_en = flags & DMA_PREP_INTERRUPT;
-		iter->desc_ctrl = u_desc_ctrl.value;
-
-		/* for the subsequent descriptors preserve the store queue
-		 * and chain them together
-		 */
-		if (i) {
-			prev_hw_desc =
-				iop_hw_desc_slot_idx(hw_desc, i - slots_per_op);
-			prev_hw_desc->next_desc =
-				(u32) (desc->async_tx.phys + (i << 5));
-		}
-	}
-
-	return j;
-}
-
-static inline void
-iop_desc_init_null_xor(struct iop_adma_desc_slot *desc, int src_cnt,
-		       unsigned long flags)
-{
-	struct iop3xx_desc_aau *hw_desc = desc->hw_desc;
-	union {
-		u32 value;
-		struct iop3xx_aau_desc_ctrl field;
-	} u_desc_ctrl;
-
-	u_desc_ctrl.value = 0;
-	switch (src_cnt) {
-	case 25 ... 32:
-		u_desc_ctrl.field.blk_ctrl = 0x3; /* use EDCR[2:0] */
-		hw_desc->src_edc[AAU_EDCR2_IDX].e_desc_ctrl = 0;
-		fallthrough;
-	case 17 ... 24:
-		if (!u_desc_ctrl.field.blk_ctrl) {
-			hw_desc->src_edc[AAU_EDCR2_IDX].e_desc_ctrl = 0;
-			u_desc_ctrl.field.blk_ctrl = 0x3; /* use EDCR[2:0] */
-		}
-		hw_desc->src_edc[AAU_EDCR1_IDX].e_desc_ctrl = 0;
-		fallthrough;
-	case 9 ... 16:
-		if (!u_desc_ctrl.field.blk_ctrl)
-			u_desc_ctrl.field.blk_ctrl = 0x2; /* use EDCR0 */
-		hw_desc->src_edc[AAU_EDCR0_IDX].e_desc_ctrl = 0;
-		fallthrough;
-	case 1 ... 8:
-		if (!u_desc_ctrl.field.blk_ctrl && src_cnt > 4)
-			u_desc_ctrl.field.blk_ctrl = 0x1; /* use mini-desc */
-	}
-
-	u_desc_ctrl.field.dest_write_en = 0;
-	u_desc_ctrl.field.int_en = flags & DMA_PREP_INTERRUPT;
-	hw_desc->desc_ctrl = u_desc_ctrl.value;
-}
-
-static inline void iop_desc_set_byte_count(struct iop_adma_desc_slot *desc,
-					struct iop_adma_chan *chan,
-					u32 byte_count)
-{
-	union iop3xx_desc hw_desc = { .ptr = desc->hw_desc, };
-
-	switch (chan->device->id) {
-	case DMA0_ID:
-	case DMA1_ID:
-		hw_desc.dma->byte_count = byte_count;
-		break;
-	case AAU_ID:
-		hw_desc.aau->byte_count = byte_count;
-		break;
-	default:
-		BUG();
-	}
-}
-
-static inline void
-iop_desc_init_interrupt(struct iop_adma_desc_slot *desc,
-			struct iop_adma_chan *chan)
-{
-	union iop3xx_desc hw_desc = { .ptr = desc->hw_desc, };
-
-	switch (chan->device->id) {
-	case DMA0_ID:
-	case DMA1_ID:
-		iop_desc_init_memcpy(desc, 1);
-		hw_desc.dma->byte_count = 0;
-		hw_desc.dma->dest_addr = 0;
-		hw_desc.dma->src_addr = 0;
-		break;
-	case AAU_ID:
-		iop_desc_init_null_xor(desc, 2, 1);
-		hw_desc.aau->byte_count = 0;
-		hw_desc.aau->dest_addr = 0;
-		hw_desc.aau->src[0] = 0;
-		hw_desc.aau->src[1] = 0;
-		break;
-	default:
-		BUG();
-	}
-}
-
-static inline void
-iop_desc_set_zero_sum_byte_count(struct iop_adma_desc_slot *desc, u32 len)
-{
-	int slots_per_op = desc->slots_per_op;
-	struct iop3xx_desc_aau *hw_desc = desc->hw_desc, *iter;
-	int i = 0;
-
-	if (len <= IOP_ADMA_ZERO_SUM_MAX_BYTE_COUNT) {
-		hw_desc->byte_count = len;
-	} else {
-		do {
-			iter = iop_hw_desc_slot_idx(hw_desc, i);
-			iter->byte_count = IOP_ADMA_ZERO_SUM_MAX_BYTE_COUNT;
-			len -= IOP_ADMA_ZERO_SUM_MAX_BYTE_COUNT;
-			i += slots_per_op;
-		} while (len > IOP_ADMA_ZERO_SUM_MAX_BYTE_COUNT);
-
-		iter = iop_hw_desc_slot_idx(hw_desc, i);
-		iter->byte_count = len;
-	}
-}
-
-static inline void iop_desc_set_dest_addr(struct iop_adma_desc_slot *desc,
-					struct iop_adma_chan *chan,
-					dma_addr_t addr)
-{
-	union iop3xx_desc hw_desc = { .ptr = desc->hw_desc, };
-
-	switch (chan->device->id) {
-	case DMA0_ID:
-	case DMA1_ID:
-		hw_desc.dma->dest_addr = addr;
-		break;
-	case AAU_ID:
-		hw_desc.aau->dest_addr = addr;
-		break;
-	default:
-		BUG();
-	}
-}
-
-static inline void iop_desc_set_memcpy_src_addr(struct iop_adma_desc_slot *desc,
-					dma_addr_t addr)
-{
-	struct iop3xx_desc_dma *hw_desc = desc->hw_desc;
-	hw_desc->src_addr = addr;
-}
-
-static inline void
-iop_desc_set_zero_sum_src_addr(struct iop_adma_desc_slot *desc, int src_idx,
-				dma_addr_t addr)
-{
-
-	struct iop3xx_desc_aau *hw_desc = desc->hw_desc, *iter;
-	int slot_cnt = desc->slot_cnt, slots_per_op = desc->slots_per_op;
-	int i;
-
-	for (i = 0; (slot_cnt -= slots_per_op) >= 0;
-		i += slots_per_op, addr += IOP_ADMA_ZERO_SUM_MAX_BYTE_COUNT) {
-		iter = iop_hw_desc_slot_idx(hw_desc, i);
-		iop3xx_aau_desc_set_src_addr(iter, src_idx, addr);
-	}
-}
-
-static inline void iop_desc_set_xor_src_addr(struct iop_adma_desc_slot *desc,
-					int src_idx, dma_addr_t addr)
-{
-
-	struct iop3xx_desc_aau *hw_desc = desc->hw_desc, *iter;
-	int slot_cnt = desc->slot_cnt, slots_per_op = desc->slots_per_op;
-	int i;
-
-	for (i = 0; (slot_cnt -= slots_per_op) >= 0;
-		i += slots_per_op, addr += IOP_ADMA_XOR_MAX_BYTE_COUNT) {
-		iter = iop_hw_desc_slot_idx(hw_desc, i);
-		iop3xx_aau_desc_set_src_addr(iter, src_idx, addr);
-	}
-}
-
-static inline void iop_desc_set_next_desc(struct iop_adma_desc_slot *desc,
-					u32 next_desc_addr)
-{
-	/* hw_desc->next_desc is the same location for all channels */
-	union iop3xx_desc hw_desc = { .ptr = desc->hw_desc, };
-
-	iop_paranoia(hw_desc.dma->next_desc);
-	hw_desc.dma->next_desc = next_desc_addr;
-}
-
-static inline u32 iop_desc_get_next_desc(struct iop_adma_desc_slot *desc)
-{
-	/* hw_desc->next_desc is the same location for all channels */
-	union iop3xx_desc hw_desc = { .ptr = desc->hw_desc, };
-	return hw_desc.dma->next_desc;
-}
-
-static inline void iop_desc_clear_next_desc(struct iop_adma_desc_slot *desc)
-{
-	/* hw_desc->next_desc is the same location for all channels */
-	union iop3xx_desc hw_desc = { .ptr = desc->hw_desc, };
-	hw_desc.dma->next_desc = 0;
-}
-
-static inline void iop_desc_set_block_fill_val(struct iop_adma_desc_slot *desc,
-						u32 val)
-{
-	struct iop3xx_desc_aau *hw_desc = desc->hw_desc;
-	hw_desc->src[0] = val;
-}
-
-static inline enum sum_check_flags
-iop_desc_get_zero_result(struct iop_adma_desc_slot *desc)
-{
-	struct iop3xx_desc_aau *hw_desc = desc->hw_desc;
-	struct iop3xx_aau_desc_ctrl desc_ctrl = hw_desc->desc_ctrl_field;
-
-	iop_paranoia(!(desc_ctrl.tx_complete && desc_ctrl.zero_result_en));
-	return desc_ctrl.zero_result_err << SUM_CHECK_P;
-}
-
-static inline void iop_chan_append(struct iop_adma_chan *chan)
-{
-	u32 dma_chan_ctrl;
-
-	dma_chan_ctrl = __raw_readl(DMA_CCR(chan));
-	dma_chan_ctrl |= 0x2;
-	__raw_writel(dma_chan_ctrl, DMA_CCR(chan));
-}
-
-static inline u32 iop_chan_get_status(struct iop_adma_chan *chan)
-{
-	return __raw_readl(DMA_CSR(chan));
-}
-
-static inline void iop_chan_disable(struct iop_adma_chan *chan)
-{
-	u32 dma_chan_ctrl = __raw_readl(DMA_CCR(chan));
-	dma_chan_ctrl &= ~1;
-	__raw_writel(dma_chan_ctrl, DMA_CCR(chan));
-}
-
-static inline void iop_chan_enable(struct iop_adma_chan *chan)
-{
-	u32 dma_chan_ctrl = __raw_readl(DMA_CCR(chan));
-
-	dma_chan_ctrl |= 1;
-	__raw_writel(dma_chan_ctrl, DMA_CCR(chan));
-}
-
-static inline void iop_adma_device_clear_eot_status(struct iop_adma_chan *chan)
-{
-	u32 status = __raw_readl(DMA_CSR(chan));
-	status &= (1 << 9);
-	__raw_writel(status, DMA_CSR(chan));
-}
-
-static inline void iop_adma_device_clear_eoc_status(struct iop_adma_chan *chan)
-{
-	u32 status = __raw_readl(DMA_CSR(chan));
-	status &= (1 << 8);
-	__raw_writel(status, DMA_CSR(chan));
-}
-
-static inline void iop_adma_device_clear_err_status(struct iop_adma_chan *chan)
-{
-	u32 status = __raw_readl(DMA_CSR(chan));
-
-	switch (chan->device->id) {
-	case DMA0_ID:
-	case DMA1_ID:
-		status &= (1 << 5) | (1 << 3) | (1 << 2) | (1 << 1);
-		break;
-	case AAU_ID:
-		status &= (1 << 5);
-		break;
-	default:
-		BUG();
-	}
-
-	__raw_writel(status, DMA_CSR(chan));
-}
-
-static inline int
-iop_is_err_int_parity(unsigned long status, struct iop_adma_chan *chan)
-{
-	return 0;
-}
-
-static inline int
-iop_is_err_mcu_abort(unsigned long status, struct iop_adma_chan *chan)
-{
-	return 0;
-}
-
-static inline int
-iop_is_err_int_tabort(unsigned long status, struct iop_adma_chan *chan)
-{
-	return 0;
-}
-
-static inline int
-iop_is_err_int_mabort(unsigned long status, struct iop_adma_chan *chan)
-{
-	return test_bit(5, &status);
-}
-
-static inline int
-iop_is_err_pci_tabort(unsigned long status, struct iop_adma_chan *chan)
-{
-	switch (chan->device->id) {
-	case DMA0_ID:
-	case DMA1_ID:
-		return test_bit(2, &status);
-	default:
-		return 0;
-	}
-}
-
-static inline int
-iop_is_err_pci_mabort(unsigned long status, struct iop_adma_chan *chan)
-{
-	switch (chan->device->id) {
-	case DMA0_ID:
-	case DMA1_ID:
-		return test_bit(3, &status);
-	default:
-		return 0;
-	}
-}
-
-static inline int
-iop_is_err_split_tx(unsigned long status, struct iop_adma_chan *chan)
-{
-	switch (chan->device->id) {
-	case DMA0_ID:
-	case DMA1_ID:
-		return test_bit(1, &status);
-	default:
-		return 0;
-	}
-}
-#endif /* _ADMA_H */