[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / dma / ioat / dma.h

/*
 * Copyright(c) 2004 - 2009 Intel Corporation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 2 of the License, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 59
 * Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * The full GNU General Public License is included in this distribution in the
 * file called COPYING.
 */
#ifndef IOATDMA_H
#define IOATDMA_H

#include <linux/dmaengine.h>
#include "hw.h"
#include "registers.h"
#include <linux/init.h>
#include <linux/dmapool.h>
#include <linux/cache.h>
#include <linux/pci_ids.h>
#include <net/tcp.h>

#define IOAT_DMA_VERSION  "3.64"

#define IOAT_LOW_COMPLETION_MASK	0xffffffc0
#define IOAT_DMA_DCA_ANY_CPU		~0

#define to_ioatdma_device(dev) container_of(dev, struct ioatdma_device, common)
#define to_ioat_desc(lh) container_of(lh, struct ioat_desc_sw, node)
#define tx_to_ioat_desc(tx) container_of(tx, struct ioat_desc_sw, txd)
#define to_dev(ioat_chan) (&(ioat_chan)->device->pdev->dev)

#define chan_num(ch) ((int)((ch)->reg_base - (ch)->device->reg_base) / 0x80)

/*
 * workaround for IOAT ver.3.0 null descriptor issue
 * (channel returns error when size is 0)
 */
#define NULL_DESC_BUFFER_SIZE 1

/**
 * struct ioatdma_device - internal representation of a IOAT device
 * @pdev: PCI-Express device
 * @reg_base: MMIO register space base address
 * @dma_pool: for allocating DMA descriptors
 * @common: embedded struct dma_device
 * @version: version of ioatdma device
 * @msix_entries: irq handlers
 * @idx: per channel data
 * @dca: direct cache access context
 * @intr_quirk: interrupt setup quirk (for ioat_v1 devices)
 * @enumerate_channels: hw version specific channel enumeration
 */

struct ioatdma_device {
	struct pci_dev *pdev;
	void __iomem *reg_base;
	struct pci_pool *dma_pool;
	struct pci_pool *completion_pool;
	struct dma_device common;
	u8 version;
	struct msix_entry msix_entries[4];
	struct ioat_chan_common *idx[4];
	struct dca_provider *dca;
	void (*intr_quirk)(struct ioatdma_device *device);
	int (*enumerate_channels)(struct ioatdma_device *device);
};

struct ioat_chan_common {
	struct dma_chan common;
	void __iomem *reg_base;
	unsigned long last_completion;
	spinlock_t cleanup_lock;
	dma_cookie_t completed_cookie;
	unsigned long state;
	#define IOAT_COMPLETION_PENDING 0
	#define IOAT_COMPLETION_ACK 1
	#define IOAT_RESET_PENDING 2
	struct timer_list timer;
	#define COMPLETION_TIMEOUT msecs_to_jiffies(100)
	#define IDLE_TIMEOUT msecs_to_jiffies(2000)
	#define RESET_DELAY msecs_to_jiffies(100)
	struct ioatdma_device *device;
	dma_addr_t completion_dma;
	u64 *completion;
	struct tasklet_struct cleanup_task;
};


/**
 * struct ioat_dma_chan - internal representation of a DMA channel
 */
struct ioat_dma_chan {
	struct ioat_chan_common base;

	size_t xfercap;	/* XFERCAP register value expanded out */

	spinlock_t desc_lock;
	struct list_head free_desc;
	struct list_head used_desc;

	int pending;
	u16 desccount;
};

static inline struct ioat_chan_common *to_chan_common(struct dma_chan *c)
{
	return container_of(c, struct ioat_chan_common, common);
}

static inline struct ioat_dma_chan *to_ioat_chan(struct dma_chan *c)
{
	struct ioat_chan_common *chan = to_chan_common(c);

	return container_of(chan, struct ioat_dma_chan, base);
}

/**
 * ioat_is_complete - poll the status of an ioat transaction
 * @c: channel handle
 * @cookie: transaction identifier
 * @done: if set, updated with last completed transaction
 * @used: if set, updated with last used transaction
 */
static inline enum dma_status
ioat_is_complete(struct dma_chan *c, dma_cookie_t cookie,
		 dma_cookie_t *done, dma_cookie_t *used)
{
	struct ioat_chan_common *chan = to_chan_common(c);
	dma_cookie_t last_used;
	dma_cookie_t last_complete;

	last_used = c->cookie;
	last_complete = chan->completed_cookie;

	if (done)
		*done = last_complete;
	if (used)
		*used = last_used;

	return dma_async_is_complete(cookie, last_complete, last_used);
}

/* wrapper around hardware descriptor format + additional software fields */

/**
 * struct ioat_desc_sw - wrapper around hardware descriptor
 * @hw: hardware DMA descriptor
 * @node: this descriptor will either be on the free list,
 *     or attached to a transaction list (tx_list)
 * @txd: the generic software descriptor for all engines
 * @id: identifier for debug
 */
struct ioat_desc_sw {
	struct ioat_dma_descriptor *hw;
	struct list_head node;
	size_t len;
	struct list_head tx_list;
	struct dma_async_tx_descriptor txd;
	#ifdef DEBUG
	int id;
	#endif
};

#ifdef DEBUG
#define set_desc_id(desc, i) ((desc)->id = (i))
#define desc_id(desc) ((desc)->id)
#else
#define set_desc_id(desc, i)
#define desc_id(desc) (0)
#endif

static inline void
__dump_desc_dbg(struct ioat_chan_common *chan, struct ioat_dma_descriptor *hw,
		struct dma_async_tx_descriptor *tx, int id)
{
	struct device *dev = to_dev(chan);

	dev_dbg(dev, "desc[%d]: (%#llx->%#llx) cookie: %d flags: %#x"
		" ctl: %#x (op: %d int_en: %d compl: %d)\n", id,
		(unsigned long long) tx->phys,
		(unsigned long long) hw->next, tx->cookie, tx->flags,
		hw->ctl, hw->ctl_f.op, hw->ctl_f.int_en, hw->ctl_f.compl_write);
}

#define dump_desc_dbg(c, d) \
	({ if (d) __dump_desc_dbg(&c->base, d->hw, &d->txd, desc_id(d)); 0; })

static inline void ioat_set_tcp_copy_break(unsigned long copybreak)
{
	#ifdef CONFIG_NET_DMA
	sysctl_tcp_dma_copybreak = copybreak;
	#endif
}

static inline struct ioat_chan_common *
ioat_chan_by_index(struct ioatdma_device *device, int index)
{
	return device->idx[index];
}

static inline u64 ioat_chansts(struct ioat_chan_common *chan)
{
	u8 ver = chan->device->version;
	u64 status;
	u32 status_lo;

	/* We need to read the low address first as this causes the
	 * chipset to latch the upper bits for the subsequent read
	 */
	status_lo = readl(chan->reg_base + IOAT_CHANSTS_OFFSET_LOW(ver));
	status = readl(chan->reg_base + IOAT_CHANSTS_OFFSET_HIGH(ver));
	status <<= 32;
	status |= status_lo;

	return status;
}

static inline void ioat_start(struct ioat_chan_common *chan)
{
	u8 ver = chan->device->version;

	writeb(IOAT_CHANCMD_START, chan->reg_base + IOAT_CHANCMD_OFFSET(ver));
}

static inline u64 ioat_chansts_to_addr(u64 status)
{
	return status & IOAT_CHANSTS_COMPLETED_DESCRIPTOR_ADDR;
}

static inline u32 ioat_chanerr(struct ioat_chan_common *chan)
{
	return readl(chan->reg_base + IOAT_CHANERR_OFFSET);
}

static inline void ioat_suspend(struct ioat_chan_common *chan)
{
	u8 ver = chan->device->version;

	writeb(IOAT_CHANCMD_SUSPEND, chan->reg_base + IOAT_CHANCMD_OFFSET(ver));
}

static inline void ioat_set_chainaddr(struct ioat_dma_chan *ioat, u64 addr)
{
	struct ioat_chan_common *chan = &ioat->base;

	writel(addr & 0x00000000FFFFFFFF,
	       chan->reg_base + IOAT1_CHAINADDR_OFFSET_LOW);
	writel(addr >> 32,
	       chan->reg_base + IOAT1_CHAINADDR_OFFSET_HIGH);
}

static inline bool is_ioat_active(unsigned long status)
{
	return ((status & IOAT_CHANSTS_STATUS) == IOAT_CHANSTS_ACTIVE);
}

static inline bool is_ioat_idle(unsigned long status)
{
	return ((status & IOAT_CHANSTS_STATUS) == IOAT_CHANSTS_DONE);
}

static inline bool is_ioat_halted(unsigned long status)
{
	return ((status & IOAT_CHANSTS_STATUS) == IOAT_CHANSTS_HALTED);
}

static inline bool is_ioat_suspended(unsigned long status)
{
	return ((status & IOAT_CHANSTS_STATUS) == IOAT_CHANSTS_SUSPENDED);
}

/* channel was fatally programmed */
static inline bool is_ioat_bug(unsigned long err)
{
	return !!(err & (IOAT_CHANERR_SRC_ADDR_ERR|IOAT_CHANERR_DEST_ADDR_ERR|
			 IOAT_CHANERR_NEXT_ADDR_ERR|IOAT_CHANERR_CONTROL_ERR|
			 IOAT_CHANERR_LENGTH_ERR));
}

int __devinit ioat_probe(struct ioatdma_device *device);
int __devinit ioat_register(struct ioatdma_device *device);
int __devinit ioat1_dma_probe(struct ioatdma_device *dev, int dca);
void __devexit ioat_dma_remove(struct ioatdma_device *device);
struct dca_provider * __devinit ioat_dca_init(struct pci_dev *pdev,
					      void __iomem *iobase);
unsigned long ioat_get_current_completion(struct ioat_chan_common *chan);
void ioat_init_channel(struct ioatdma_device *device,
		       struct ioat_chan_common *chan, int idx,
		       void (*timer_fn)(unsigned long),
		       void (*tasklet)(unsigned long),
		       unsigned long ioat);
void ioat_dma_unmap(struct ioat_chan_common *chan, enum dma_ctrl_flags flags,
		    size_t len, struct ioat_dma_descriptor *hw);
bool ioat_cleanup_preamble(struct ioat_chan_common *chan,
			   unsigned long *phys_complete);
#endif /* IOATDMA_H */
Commit	Line	Data
0bbd5f4e	1	/*
211a22ce	2	* Copyright(c) 2004 - 2009 Intel Corporation. All rights reserved.
0bbd5f4e CL	3	*
	4	* This program is free software; you can redistribute it and/or modify it
	5	* under the terms of the GNU General Public License as published by the Free
	6	* Software Foundation; either version 2 of the License, or (at your option)
	7	* any later version.
	8	*
	9	* This program is distributed in the hope that it will be useful, but WITHOUT
	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	12	* more details.
	13	*
	14	* You should have received a copy of the GNU General Public License along with
	15	* this program; if not, write to the Free Software Foundation, Inc., 59
	16	* Temple Place - Suite 330, Boston, MA 02111-1307, USA.
	17	*
	18	* The full GNU General Public License is included in this distribution in the
	19	* file called COPYING.
	20	*/
	21	#ifndef IOATDMA_H
	22	#define IOATDMA_H
	23
	24	#include <linux/dmaengine.h>
584ec227	25	#include "hw.h"
09c8a5b8	26	#include "registers.h"
0bbd5f4e CL	27	#include <linux/init.h>
	28	#include <linux/dmapool.h>
	29	#include <linux/cache.h>
57c651f7	30	#include <linux/pci_ids.h>
16a37aca	31	#include <net/tcp.h>
0bbd5f4e	32
211a22ce	33	#define IOAT_DMA_VERSION "3.64"
5149fd01	34
0bbd5f4e	35	#define IOAT_LOW_COMPLETION_MASK 0xffffffc0
7bb67c14 SN	36	#define IOAT_DMA_DCA_ANY_CPU ~0
7bb67c14 SN	37
1f27adc2 DW	38	#define to_ioatdma_device(dev) container_of(dev, struct ioatdma_device, common)
1f27adc2 DW	39	#define to_ioat_desc(lh) container_of(lh, struct ioat_desc_sw, node)
bc3c7025 DW	40	#define tx_to_ioat_desc(tx) container_of(tx, struct ioat_desc_sw, txd)
bc3c7025 DW	41	#define to_dev(ioat_chan) (&(ioat_chan)->device->pdev->dev)
1f27adc2 DW	42
	43	#define chan_num(ch) ((int)((ch)->reg_base - (ch)->device->reg_base) / 0x80)
	44
1f27adc2 DW	45	/*
	46	* workaround for IOAT ver.3.0 null descriptor issue
	47	* (channel returns error when size is 0)
	48	*/
	49	#define NULL_DESC_BUFFER_SIZE 1
	50
0bbd5f4e	51	/**
8ab89567	52	* struct ioatdma_device - internal representation of a IOAT device
0bbd5f4e CL	53	* @pdev: PCI-Express device
	54	* @reg_base: MMIO register space base address
	55	* @dma_pool: for allocating DMA descriptors
	56	* @common: embedded struct dma_device
8ab89567	57	* @version: version of ioatdma device
7bb67c14 SN	58	* @msix_entries: irq handlers
7bb67c14 SN	59	* @idx: per channel data
f2427e27 DW	60	* @dca: direct cache access context
f2427e27 DW	61	* @intr_quirk: interrupt setup quirk (for ioat_v1 devices)
5cbafa65	62	* @enumerate_channels: hw version specific channel enumeration
0bbd5f4e CL	63	*/
0bbd5f4e CL	64
8ab89567	65	struct ioatdma_device {
0bbd5f4e	66	struct pci_dev *pdev;
47b16539	67	void __iomem *reg_base;
0bbd5f4e CL	68	struct pci_pool *dma_pool;
0bbd5f4e CL	69	struct pci_pool *completion_pool;
0bbd5f4e	70	struct dma_device common;
8ab89567	71	u8 version;
3e037454	72	struct msix_entry msix_entries[4];
dcbc853a	73	struct ioat_chan_common *idx[4];
f2427e27 DW	74	struct dca_provider *dca;
f2427e27 DW	75	void (intr_quirk)(struct ioatdma_device device);
5cbafa65	76	int (enumerate_channels)(struct ioatdma_device device);
0bbd5f4e CL	77	};
0bbd5f4e CL	78
dcbc853a	79	struct ioat_chan_common {
09c8a5b8	80	struct dma_chan common;
47b16539	81	void __iomem *reg_base;
0bbd5f4e	82	unsigned long last_completion;
0bbd5f4e	83	spinlock_t cleanup_lock;
dcbc853a	84	dma_cookie_t completed_cookie;
09c8a5b8 DW	85	unsigned long state;
	86	#define IOAT_COMPLETION_PENDING 0
	87	#define IOAT_COMPLETION_ACK 1
	88	#define IOAT_RESET_PENDING 2
	89	struct timer_list timer;
	90	#define COMPLETION_TIMEOUT msecs_to_jiffies(100)
a309218a	91	#define IDLE_TIMEOUT msecs_to_jiffies(2000)
09c8a5b8	92	#define RESET_DELAY msecs_to_jiffies(100)
8ab89567	93	struct ioatdma_device *device;
4fb9b9e8 DW	94	dma_addr_t completion_dma;
4fb9b9e8 DW	95	u64 *completion;
3e037454	96	struct tasklet_struct cleanup_task;
0bbd5f4e CL	97	};
0bbd5f4e CL	98
5cbafa65	99
dcbc853a DW	100	/**
	101	* struct ioat_dma_chan - internal representation of a DMA channel
	102	*/
	103	struct ioat_dma_chan {
	104	struct ioat_chan_common base;
	105
	106	size_t xfercap; /* XFERCAP register value expanded out */
	107
	108	spinlock_t desc_lock;
	109	struct list_head free_desc;
	110	struct list_head used_desc;
	111
	112	int pending;
dcbc853a DW	113	u16 desccount;
	114	};
	115
	116	static inline struct ioat_chan_common to_chan_common(struct dma_chan c)
	117	{
	118	return container_of(c, struct ioat_chan_common, common);
	119	}
	120
	121	static inline struct ioat_dma_chan to_ioat_chan(struct dma_chan c)
	122	{
	123	struct ioat_chan_common *chan = to_chan_common(c);
	124
	125	return container_of(chan, struct ioat_dma_chan, base);
	126	}
	127
5cbafa65 DW	128	/**
	129	* ioat_is_complete - poll the status of an ioat transaction
	130	* @c: channel handle
	131	* @cookie: transaction identifier
	132	* @done: if set, updated with last completed transaction
	133	* @used: if set, updated with last used transaction
	134	*/
	135	static inline enum dma_status
	136	ioat_is_complete(struct dma_chan *c, dma_cookie_t cookie,
	137	dma_cookie_t done, dma_cookie_t used)
	138	{
	139	struct ioat_chan_common *chan = to_chan_common(c);
	140	dma_cookie_t last_used;
	141	dma_cookie_t last_complete;
	142
	143	last_used = c->cookie;
	144	last_complete = chan->completed_cookie;
5cbafa65 DW	145
	146	if (done)
	147	*done = last_complete;
	148	if (used)
	149	*used = last_used;
	150
	151	return dma_async_is_complete(cookie, last_complete, last_used);
	152	}
	153
0bbd5f4e CL	154	/* wrapper around hardware descriptor format + additional software fields */
	155
	156	/**
	157	* struct ioat_desc_sw - wrapper around hardware descriptor
	158	* @hw: hardware DMA descriptor
7405f74b	159	* @node: this descriptor will either be on the free list,
ea25968a	160	* or attached to a transaction list (tx_list)
bc3c7025	161	* @txd: the generic software descriptor for all engines
6df9183a	162	* @id: identifier for debug
0bbd5f4e	163	*/
0bbd5f4e CL	164	struct ioat_desc_sw {
	165	struct ioat_dma_descriptor *hw;
	166	struct list_head node;
7f2b291f	167	size_t len;
ea25968a	168	struct list_head tx_list;
bc3c7025	169	struct dma_async_tx_descriptor txd;
6df9183a DW	170	#ifdef DEBUG
	171	int id;
	172	#endif
0bbd5f4e CL	173	};
0bbd5f4e CL	174
6df9183a DW	175	#ifdef DEBUG
	176	#define set_desc_id(desc, i) ((desc)->id = (i))
	177	#define desc_id(desc) ((desc)->id)
	178	#else
	179	#define set_desc_id(desc, i)
	180	#define desc_id(desc) (0)
	181	#endif
	182
	183	static inline void
	184	__dump_desc_dbg(struct ioat_chan_common chan, struct ioat_dma_descriptor hw,
	185	struct dma_async_tx_descriptor *tx, int id)
	186	{
	187	struct device *dev = to_dev(chan);
	188
	189	dev_dbg(dev, "desc[%d]: (%#llx->%#llx) cookie: %d flags: %#x"
	190	" ctl: %#x (op: %d int_en: %d compl: %d)\n", id,
	191	(unsigned long long) tx->phys,
	192	(unsigned long long) hw->next, tx->cookie, tx->flags,
	193	hw->ctl, hw->ctl_f.op, hw->ctl_f.int_en, hw->ctl_f.compl_write);
	194	}
	195
	196	#define dump_desc_dbg(c, d) \
	197	({ if (d) __dump_desc_dbg(&c->base, d->hw, &d->txd, desc_id(d)); 0; })
	198
f2427e27	199	static inline void ioat_set_tcp_copy_break(unsigned long copybreak)
16a37aca MS	200	{
16a37aca MS	201	#ifdef CONFIG_NET_DMA
f2427e27	202	sysctl_tcp_dma_copybreak = copybreak;
16a37aca MS	203	#endif
	204	}
	205
5cbafa65 DW	206	static inline struct ioat_chan_common *
	207	ioat_chan_by_index(struct ioatdma_device *device, int index)
	208	{
	209	return device->idx[index];
	210	}
	211
09c8a5b8 DW	212	static inline u64 ioat_chansts(struct ioat_chan_common *chan)
	213	{
	214	u8 ver = chan->device->version;
	215	u64 status;
	216	u32 status_lo;
	217
	218	/* We need to read the low address first as this causes the
	219	* chipset to latch the upper bits for the subsequent read
	220	*/
	221	status_lo = readl(chan->reg_base + IOAT_CHANSTS_OFFSET_LOW(ver));
	222	status = readl(chan->reg_base + IOAT_CHANSTS_OFFSET_HIGH(ver));
	223	status <<= 32;
	224	status \|= status_lo;
	225
	226	return status;
	227	}
	228
	229	static inline void ioat_start(struct ioat_chan_common *chan)
	230	{
	231	u8 ver = chan->device->version;
	232
	233	writeb(IOAT_CHANCMD_START, chan->reg_base + IOAT_CHANCMD_OFFSET(ver));
	234	}
	235
	236	static inline u64 ioat_chansts_to_addr(u64 status)
	237	{
	238	return status & IOAT_CHANSTS_COMPLETED_DESCRIPTOR_ADDR;
	239	}
	240
	241	static inline u32 ioat_chanerr(struct ioat_chan_common *chan)
	242	{
	243	return readl(chan->reg_base + IOAT_CHANERR_OFFSET);
	244	}
	245
	246	static inline void ioat_suspend(struct ioat_chan_common *chan)
	247	{
	248	u8 ver = chan->device->version;
	249
	250	writeb(IOAT_CHANCMD_SUSPEND, chan->reg_base + IOAT_CHANCMD_OFFSET(ver));
	251	}
	252
	253	static inline void ioat_set_chainaddr(struct ioat_dma_chan *ioat, u64 addr)
	254	{
	255	struct ioat_chan_common *chan = &ioat->base;
	256
	257	writel(addr & 0x00000000FFFFFFFF,
	258	chan->reg_base + IOAT1_CHAINADDR_OFFSET_LOW);
	259	writel(addr >> 32,
	260	chan->reg_base + IOAT1_CHAINADDR_OFFSET_HIGH);
	261	}
	262
	263	static inline bool is_ioat_active(unsigned long status)
	264	{
	265	return ((status & IOAT_CHANSTS_STATUS) == IOAT_CHANSTS_ACTIVE);
	266	}
	267
	268	static inline bool is_ioat_idle(unsigned long status)
	269	{
	270	return ((status & IOAT_CHANSTS_STATUS) == IOAT_CHANSTS_DONE);
	271	}
	272
	273	static inline bool is_ioat_halted(unsigned long status)
	274	{
	275	return ((status & IOAT_CHANSTS_STATUS) == IOAT_CHANSTS_HALTED);
276	}
277
278	static inline bool is_ioat_suspended(unsigned long status)
279	{
280	return ((status & IOAT_CHANSTS_STATUS) == IOAT_CHANSTS_SUSPENDED);
281	}
282
283	/* channel was fatally programmed */
284	static inline bool is_ioat_bug(unsigned long err)
285	{
286	return !!(err & (IOAT_CHANERR_SRC_ADDR_ERR\|IOAT_CHANERR_DEST_ADDR_ERR\|
287	IOAT_CHANERR_NEXT_ADDR_ERR\|IOAT_CHANERR_CONTROL_ERR\|
288	IOAT_CHANERR_LENGTH_ERR));
289	}
290
345d8523 DW	291	int __devinit ioat_probe(struct ioatdma_device *device);
	292	int __devinit ioat_register(struct ioatdma_device *device);
	293	int __devinit ioat1_dma_probe(struct ioatdma_device *dev, int dca);
	294	void __devexit ioat_dma_remove(struct ioatdma_device *device);
	295	struct dca_provider * __devinit ioat_dca_init(struct pci_dev *pdev,
	296	void __iomem *iobase);
5cbafa65 DW	297	unsigned long ioat_get_current_completion(struct ioat_chan_common *chan);
	298	void ioat_init_channel(struct ioatdma_device *device,
	299	struct ioat_chan_common *chan, int idx,
09c8a5b8 DW	300	void (*timer_fn)(unsigned long),
	301	void (*tasklet)(unsigned long),
	302	unsigned long ioat);
5cbafa65 DW	303	void ioat_dma_unmap(struct ioat_chan_common *chan, enum dma_ctrl_flags flags,
5cbafa65 DW	304	size_t len, struct ioat_dma_descriptor *hw);
09c8a5b8 DW	305	bool ioat_cleanup_preamble(struct ioat_chan_common *chan,
09c8a5b8 DW	306	unsigned long *phys_complete);
0bbd5f4e	307	#endif /* IOATDMA_H */