author | Florian Westphal <fw@strlen.de> |
Thu, 09 Apr 2009 12:07:21 +0200 | |
changeset 2 | d1f6d8b6f81c |
parent 0 | aa628870c1d3 |
permissions | -rw-r--r-- |
0
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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/* |
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* Copyright(c) 2004 - 2006 Intel Corporation. All rights reserved. |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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* |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* This program is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License as published by the Free |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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* Software Foundation; either version 2 of the License, or (at your option) |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* any later version. |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* |
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* This program is distributed in the hope that it will be useful, but WITHOUT |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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* more details. |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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* |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* You should have received a copy of the GNU General Public License along with |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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* this program; if not, write to the Free Software Foundation, Inc., 59 |
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* Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* |
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* The full GNU General Public License is included in this distribution in the |
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* file called COPYING. |
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*/ |
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#ifndef DMAENGINE_H |
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#define DMAENGINE_H |
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|
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#include <linux/device.h> |
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#include <linux/uio.h> |
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#include <linux/kref.h> |
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#include <linux/completion.h> |
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#include <linux/rcupdate.h> |
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#include <linux/dma-mapping.h> |
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|
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/** |
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* typedef dma_cookie_t - an opaque DMA cookie |
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* |
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* if dma_cookie_t is >0 it's a DMA request cookie, <0 it's an error code |
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*/ |
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typedef s32 dma_cookie_t; |
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|
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#define dma_submit_error(cookie) ((cookie) < 0 ? 1 : 0) |
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|
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/** |
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* enum dma_status - DMA transaction status |
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* @DMA_SUCCESS: transaction completed successfully |
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* @DMA_IN_PROGRESS: transaction not yet processed |
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* @DMA_ERROR: transaction failed |
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*/ |
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enum dma_status { |
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DMA_SUCCESS, |
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DMA_IN_PROGRESS, |
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DMA_ERROR, |
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}; |
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|
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/** |
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* enum dma_transaction_type - DMA transaction types/indexes |
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*/ |
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enum dma_transaction_type { |
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DMA_MEMCPY, |
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DMA_XOR, |
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DMA_PQ_XOR, |
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DMA_DUAL_XOR, |
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DMA_PQ_UPDATE, |
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DMA_ZERO_SUM, |
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DMA_PQ_ZERO_SUM, |
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DMA_MEMSET, |
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DMA_MEMCPY_CRC32C, |
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DMA_INTERRUPT, |
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DMA_PRIVATE, |
0
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DMA_SLAVE, |
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}; |
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|
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/* last transaction type for creation of the capabilities mask */ |
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#define DMA_TX_TYPE_END (DMA_SLAVE + 1) |
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|
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|
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/** |
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* enum dma_ctrl_flags - DMA flags to augment operation preparation, |
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* control completion, and communicate status. |
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* @DMA_PREP_INTERRUPT - trigger an interrupt (callback) upon completion of |
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* this transaction |
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* @DMA_CTRL_ACK - the descriptor cannot be reused until the client |
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* acknowledges receipt, i.e. has has a chance to establish any |
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* dependency chains |
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* @DMA_COMPL_SKIP_SRC_UNMAP - set to disable dma-unmapping the source buffer(s) |
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* @DMA_COMPL_SKIP_DEST_UNMAP - set to disable dma-unmapping the destination(s) |
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*/ |
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enum dma_ctrl_flags { |
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DMA_PREP_INTERRUPT = (1 << 0), |
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DMA_CTRL_ACK = (1 << 1), |
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DMA_COMPL_SKIP_SRC_UNMAP = (1 << 2), |
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DMA_COMPL_SKIP_DEST_UNMAP = (1 << 3), |
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}; |
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|
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/** |
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* dma_cap_mask_t - capabilities bitmap modeled after cpumask_t. |
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* See linux/cpumask.h |
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*/ |
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typedef struct { DECLARE_BITMAP(bits, DMA_TX_TYPE_END); } dma_cap_mask_t; |
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|
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/** |
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* struct dma_chan_percpu - the per-CPU part of struct dma_chan |
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* @memcpy_count: transaction counter |
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* @bytes_transferred: byte counter |
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*/ |
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|
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struct dma_chan_percpu { |
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/* stats */ |
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unsigned long memcpy_count; |
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unsigned long bytes_transferred; |
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}; |
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|
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/** |
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* struct dma_chan - devices supply DMA channels, clients use them |
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* @device: ptr to the dma device who supplies this channel, always !%NULL |
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* @cookie: last cookie value returned to client |
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* @chan_id: channel ID for sysfs |
2 | 115 |
* @dev: class device for sysfs |
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* @device_node: used to add this to the device chan list |
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* @local: per-cpu pointer to a struct dma_chan_percpu |
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* @client-count: how many clients are using this channel |
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* @table_count: number of appearances in the mem-to-mem allocation table |
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* @private: private data for certain client-channel associations |
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*/ |
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struct dma_chan { |
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struct dma_device *device; |
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dma_cookie_t cookie; |
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/* sysfs */ |
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int chan_id; |
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struct dma_chan_dev *dev; |
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struct list_head device_node; |
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struct dma_chan_percpu *local; |
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int client_count; |
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int table_count; |
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void *private; |
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}; |
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/** |
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* struct dma_chan_dev - relate sysfs device node to backing channel device |
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* @chan - driver channel device |
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* @device - sysfs device |
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* @dev_id - parent dma_device dev_id |
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* @idr_ref - reference count to gate release of dma_device dev_id |
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*/ |
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struct dma_chan_dev { |
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struct dma_chan *chan; |
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struct device device; |
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int dev_id; |
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atomic_t *idr_ref; |
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}; |
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||
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static inline const char *dma_chan_name(struct dma_chan *chan) |
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{ |
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return dev_name(&chan->dev->device); |
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} |
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void dma_chan_cleanup(struct kref *kref); |
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/** |
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* typedef dma_filter_fn - callback filter for dma_request_channel |
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* @chan: channel to be reviewed |
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* @filter_param: opaque parameter passed through dma_request_channel |
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* |
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* When this optional parameter is specified in a call to dma_request_channel a |
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* suitable channel is passed to this routine for further dispositioning before |
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* being returned. Where 'suitable' indicates a non-busy channel that |
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* satisfies the given capability mask. It returns 'true' to indicate that the |
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* channel is suitable. |
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*/ |
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typedef bool (*dma_filter_fn)(struct dma_chan *chan, void *filter_param); |
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typedef void (*dma_async_tx_callback)(void *dma_async_param); |
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/** |
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* struct dma_async_tx_descriptor - async transaction descriptor |
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* ---dma generic offload fields--- |
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* @cookie: tracking cookie for this transaction, set to -EBUSY if |
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* this tx is sitting on a dependency list |
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* @flags: flags to augment operation preparation, control completion, and |
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* communicate status |
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* @phys: physical address of the descriptor |
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* @tx_list: driver common field for operations that require multiple |
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* descriptors |
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* @chan: target channel for this operation |
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* @tx_submit: set the prepared descriptor(s) to be executed by the engine |
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* @callback: routine to call after this operation is complete |
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* @callback_param: general parameter to pass to the callback routine |
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* ---async_tx api specific fields--- |
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* @next: at completion submit this descriptor |
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* @parent: pointer to the next level up in the dependency chain |
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* @lock: protect the parent and next pointers |
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*/ |
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struct dma_async_tx_descriptor { |
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dma_cookie_t cookie; |
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enum dma_ctrl_flags flags; /* not a 'long' to pack with cookie */ |
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dma_addr_t phys; |
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struct list_head tx_list; |
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struct dma_chan *chan; |
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dma_cookie_t (*tx_submit)(struct dma_async_tx_descriptor *tx); |
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dma_async_tx_callback callback; |
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void *callback_param; |
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struct dma_async_tx_descriptor *next; |
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struct dma_async_tx_descriptor *parent; |
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spinlock_t lock; |
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}; |
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/** |
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* struct dma_device - info on the entity supplying DMA services |
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* @chancnt: how many DMA channels are supported |
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* @channels: the list of struct dma_chan |
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* @global_node: list_head for global dma_device_list |
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* @cap_mask: one or more dma_capability flags |
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* @max_xor: maximum number of xor sources, 0 if no capability |
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* @dev_id: unique device ID |
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* @dev: struct device reference for dma mapping api |
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* @device_alloc_chan_resources: allocate resources and return the |
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* number of allocated descriptors |
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* @device_free_chan_resources: release DMA channel's resources |
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* @device_prep_dma_memcpy: prepares a memcpy operation |
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* @device_prep_dma_xor: prepares a xor operation |
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* @device_prep_dma_zero_sum: prepares a zero_sum operation |
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* @device_prep_dma_memset: prepares a memset operation |
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* @device_prep_dma_interrupt: prepares an end of chain interrupt operation |
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* @device_prep_slave_sg: prepares a slave dma operation |
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* @device_terminate_all: terminate all pending operations |
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* @device_is_tx_complete: poll for transaction completion |
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* @device_issue_pending: push pending transactions to hardware |
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*/ |
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struct dma_device { |
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|
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unsigned int chancnt; |
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struct list_head channels; |
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struct list_head global_node; |
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dma_cap_mask_t cap_mask; |
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int max_xor; |
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|
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int dev_id; |
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struct device *dev; |
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int (*device_alloc_chan_resources)(struct dma_chan *chan); |
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void (*device_free_chan_resources)(struct dma_chan *chan); |
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|
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struct dma_async_tx_descriptor *(*device_prep_dma_memcpy)( |
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struct dma_chan *chan, dma_addr_t dest, dma_addr_t src, |
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size_t len, unsigned long flags); |
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struct dma_async_tx_descriptor *(*device_prep_dma_xor)( |
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struct dma_chan *chan, dma_addr_t dest, dma_addr_t *src, |
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unsigned int src_cnt, size_t len, unsigned long flags); |
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struct dma_async_tx_descriptor *(*device_prep_dma_zero_sum)( |
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struct dma_chan *chan, dma_addr_t *src, unsigned int src_cnt, |
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size_t len, u32 *result, unsigned long flags); |
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struct dma_async_tx_descriptor *(*device_prep_dma_memset)( |
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struct dma_chan *chan, dma_addr_t dest, int value, size_t len, |
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unsigned long flags); |
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struct dma_async_tx_descriptor *(*device_prep_dma_interrupt)( |
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struct dma_chan *chan, unsigned long flags); |
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255 |
|
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struct dma_async_tx_descriptor *(*device_prep_slave_sg)( |
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struct dma_chan *chan, struct scatterlist *sgl, |
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unsigned int sg_len, enum dma_data_direction direction, |
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259 |
unsigned long flags); |
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void (*device_terminate_all)(struct dma_chan *chan); |
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261 |
|
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enum dma_status (*device_is_tx_complete)(struct dma_chan *chan, |
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dma_cookie_t cookie, dma_cookie_t *last, |
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264 |
dma_cookie_t *used); |
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void (*device_issue_pending)(struct dma_chan *chan); |
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266 |
}; |
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267 |
|
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/* --- public DMA engine API --- */ |
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2 | 270 |
#ifdef CONFIG_DMA_ENGINE |
271 |
void dmaengine_get(void); |
|
272 |
void dmaengine_put(void); |
|
273 |
#else |
|
274 |
static inline void dmaengine_get(void) |
|
275 |
{ |
|
276 |
} |
|
277 |
static inline void dmaengine_put(void) |
|
278 |
{ |
|
279 |
} |
|
280 |
#endif |
|
281 |
||
282 |
#ifdef CONFIG_NET_DMA |
|
283 |
#define net_dmaengine_get() dmaengine_get() |
|
284 |
#define net_dmaengine_put() dmaengine_put() |
|
285 |
#else |
|
286 |
static inline void net_dmaengine_get(void) |
|
287 |
{ |
|
288 |
} |
|
289 |
static inline void net_dmaengine_put(void) |
|
290 |
{ |
|
291 |
} |
|
292 |
#endif |
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293 |
||
0
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dma_cookie_t dma_async_memcpy_buf_to_buf(struct dma_chan *chan, |
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void *dest, void *src, size_t len); |
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dma_cookie_t dma_async_memcpy_buf_to_pg(struct dma_chan *chan, |
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struct page *page, unsigned int offset, void *kdata, size_t len); |
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dma_cookie_t dma_async_memcpy_pg_to_pg(struct dma_chan *chan, |
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struct page *dest_pg, unsigned int dest_off, struct page *src_pg, |
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unsigned int src_off, size_t len); |
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void dma_async_tx_descriptor_init(struct dma_async_tx_descriptor *tx, |
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struct dma_chan *chan); |
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303 |
|
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304 |
static inline void async_tx_ack(struct dma_async_tx_descriptor *tx) |
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305 |
{ |
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306 |
tx->flags |= DMA_CTRL_ACK; |
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307 |
} |
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308 |
|
2 | 309 |
static inline void async_tx_clear_ack(struct dma_async_tx_descriptor *tx) |
310 |
{ |
|
311 |
tx->flags &= ~DMA_CTRL_ACK; |
|
312 |
} |
|
313 |
||
0
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314 |
static inline bool async_tx_test_ack(struct dma_async_tx_descriptor *tx) |
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|
315 |
{ |
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316 |
return (tx->flags & DMA_CTRL_ACK) == DMA_CTRL_ACK; |
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317 |
} |
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318 |
|
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319 |
#define first_dma_cap(mask) __first_dma_cap(&(mask)) |
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320 |
static inline int __first_dma_cap(const dma_cap_mask_t *srcp) |
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|
321 |
{ |
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322 |
return min_t(int, DMA_TX_TYPE_END, |
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|
323 |
find_first_bit(srcp->bits, DMA_TX_TYPE_END)); |
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|
324 |
} |
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|
325 |
|
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|
326 |
#define next_dma_cap(n, mask) __next_dma_cap((n), &(mask)) |
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|
327 |
static inline int __next_dma_cap(int n, const dma_cap_mask_t *srcp) |
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|
328 |
{ |
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|
329 |
return min_t(int, DMA_TX_TYPE_END, |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
330 |
find_next_bit(srcp->bits, DMA_TX_TYPE_END, n+1)); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
331 |
} |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
332 |
|
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|
333 |
#define dma_cap_set(tx, mask) __dma_cap_set((tx), &(mask)) |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
334 |
static inline void |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
335 |
__dma_cap_set(enum dma_transaction_type tx_type, dma_cap_mask_t *dstp) |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
336 |
{ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
337 |
set_bit(tx_type, dstp->bits); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
338 |
} |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
339 |
|
2 | 340 |
#define dma_cap_zero(mask) __dma_cap_zero(&(mask)) |
341 |
static inline void __dma_cap_zero(dma_cap_mask_t *dstp) |
|
342 |
{ |
|
343 |
bitmap_zero(dstp->bits, DMA_TX_TYPE_END); |
|
344 |
} |
|
345 |
||
0
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|
346 |
#define dma_has_cap(tx, mask) __dma_has_cap((tx), &(mask)) |
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|
347 |
static inline int |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
348 |
__dma_has_cap(enum dma_transaction_type tx_type, dma_cap_mask_t *srcp) |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
349 |
{ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
350 |
return test_bit(tx_type, srcp->bits); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
351 |
} |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
352 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
353 |
#define for_each_dma_cap_mask(cap, mask) \ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
354 |
for ((cap) = first_dma_cap(mask); \ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
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|
355 |
(cap) < DMA_TX_TYPE_END; \ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
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|
356 |
(cap) = next_dma_cap((cap), (mask))) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
357 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
358 |
/** |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
changeset
|
359 |
* dma_async_issue_pending - flush pending transactions to HW |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
changeset
|
360 |
* @chan: target DMA channel |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
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|
361 |
* |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
362 |
* This allows drivers to push copies to HW in batches, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
363 |
* reducing MMIO writes where possible. |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
364 |
*/ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
365 |
static inline void dma_async_issue_pending(struct dma_chan *chan) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
366 |
{ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
changeset
|
367 |
chan->device->device_issue_pending(chan); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
368 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
changeset
|
369 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
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|
370 |
#define dma_async_memcpy_issue_pending(chan) dma_async_issue_pending(chan) |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
371 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
372 |
/** |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
373 |
* dma_async_is_tx_complete - poll for transaction completion |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
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|
374 |
* @chan: DMA channel |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
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|
375 |
* @cookie: transaction identifier to check status of |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
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|
376 |
* @last: returns last completed cookie, can be NULL |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
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|
377 |
* @used: returns last issued cookie, can be NULL |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
378 |
* |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
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|
379 |
* If @last and @used are passed in, upon return they reflect the driver |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
changeset
|
380 |
* internal state and can be used with dma_async_is_complete() to check |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
381 |
* the status of multiple cookies without re-checking hardware state. |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
382 |
*/ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
383 |
static inline enum dma_status dma_async_is_tx_complete(struct dma_chan *chan, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
384 |
dma_cookie_t cookie, dma_cookie_t *last, dma_cookie_t *used) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
385 |
{ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
386 |
return chan->device->device_is_tx_complete(chan, cookie, last, used); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
387 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
388 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
389 |
#define dma_async_memcpy_complete(chan, cookie, last, used)\ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
390 |
dma_async_is_tx_complete(chan, cookie, last, used) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
391 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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/** |
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Port of Linux 2.6.28 for use with network simulation cradle.
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393 |
* dma_async_is_complete - test a cookie against chan state |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* @cookie: transaction identifier to test status of |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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395 |
* @last_complete: last know completed transaction |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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396 |
* @last_used: last cookie value handed out |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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397 |
* |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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398 |
* dma_async_is_complete() is used in dma_async_memcpy_complete() |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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399 |
* the test logic is separated for lightweight testing of multiple cookies |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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400 |
*/ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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401 |
static inline enum dma_status dma_async_is_complete(dma_cookie_t cookie, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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402 |
dma_cookie_t last_complete, dma_cookie_t last_used) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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403 |
{ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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404 |
if (last_complete <= last_used) { |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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changeset
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405 |
if ((cookie <= last_complete) || (cookie > last_used)) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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406 |
return DMA_SUCCESS; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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407 |
} else { |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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changeset
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408 |
if ((cookie <= last_complete) && (cookie > last_used)) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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409 |
return DMA_SUCCESS; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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changeset
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410 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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411 |
return DMA_IN_PROGRESS; |
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Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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412 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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changeset
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413 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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414 |
enum dma_status dma_sync_wait(struct dma_chan *chan, dma_cookie_t cookie); |
2 | 415 |
#ifdef CONFIG_DMA_ENGINE |
416 |
enum dma_status dma_wait_for_async_tx(struct dma_async_tx_descriptor *tx); |
|
417 |
void dma_issue_pending_all(void); |
|
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#else |
|
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static inline enum dma_status dma_wait_for_async_tx(struct dma_async_tx_descriptor *tx) |
|
420 |
{ |
|
421 |
return DMA_SUCCESS; |
|
422 |
} |
|
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static inline void dma_issue_pending_all(void) |
|
424 |
{ |
|
425 |
do { } while (0); |
|
426 |
} |
|
427 |
#endif |
|
0
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Port of Linux 2.6.28 for use with network simulation cradle.
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428 |
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Port of Linux 2.6.28 for use with network simulation cradle.
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/* --- DMA device --- */ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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430 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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int dma_async_device_register(struct dma_device *device); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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432 |
void dma_async_device_unregister(struct dma_device *device); |
2 | 433 |
void dma_run_dependencies(struct dma_async_tx_descriptor *tx); |
434 |
struct dma_chan *dma_find_channel(enum dma_transaction_type tx_type); |
|
435 |
#define dma_request_channel(mask, x, y) __dma_request_channel(&(mask), x, y) |
|
436 |
struct dma_chan *__dma_request_channel(dma_cap_mask_t *mask, dma_filter_fn fn, void *fn_param); |
|
437 |
void dma_release_channel(struct dma_chan *chan); |
|
0
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Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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438 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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439 |
/* --- Helper iov-locking functions --- */ |
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Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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440 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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441 |
struct dma_page_list { |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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442 |
char __user *base_address; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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443 |
int nr_pages; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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444 |
struct page **pages; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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445 |
}; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
446 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
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447 |
struct dma_pinned_list { |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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448 |
int nr_iovecs; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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449 |
struct dma_page_list page_list[0]; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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450 |
}; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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changeset
|
451 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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452 |
struct dma_pinned_list *dma_pin_iovec_pages(struct iovec *iov, size_t len); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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453 |
void dma_unpin_iovec_pages(struct dma_pinned_list* pinned_list); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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|
454 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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changeset
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455 |
dma_cookie_t dma_memcpy_to_iovec(struct dma_chan *chan, struct iovec *iov, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
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456 |
struct dma_pinned_list *pinned_list, unsigned char *kdata, size_t len); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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457 |
dma_cookie_t dma_memcpy_pg_to_iovec(struct dma_chan *chan, struct iovec *iov, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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458 |
struct dma_pinned_list *pinned_list, struct page *page, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
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459 |
unsigned int offset, size_t len); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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changeset
|
460 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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461 |
#endif /* DMAENGINE_H */ |