Release 4.7 drivers/dma/dmaengine.c
/*
* Copyright(c) 2004 - 2006 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.
*
* The full GNU General Public License is included in this distribution in the
* file called COPYING.
*/
/*
* This code implements the DMA subsystem. It provides a HW-neutral interface
* for other kernel code to use asynchronous memory copy capabilities,
* if present, and allows different HW DMA drivers to register as providing
* this capability.
*
* Due to the fact we are accelerating what is already a relatively fast
* operation, the code goes to great lengths to avoid additional overhead,
* such as locking.
*
* LOCKING:
*
* The subsystem keeps a global list of dma_device structs it is protected by a
* mutex, dma_list_mutex.
*
* A subsystem can get access to a channel by calling dmaengine_get() followed
* by dma_find_channel(), or if it has need for an exclusive channel it can call
* dma_request_channel(). Once a channel is allocated a reference is taken
* against its corresponding driver to disable removal.
*
* Each device has a channels list, which runs unlocked but is never modified
* once the device is registered, it's just setup by the driver.
*
* See Documentation/dmaengine.txt for more details
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/device.h>
#include <linux/dmaengine.h>
#include <linux/hardirq.h>
#include <linux/spinlock.h>
#include <linux/percpu.h>
#include <linux/rcupdate.h>
#include <linux/mutex.h>
#include <linux/jiffies.h>
#include <linux/rculist.h>
#include <linux/idr.h>
#include <linux/slab.h>
#include <linux/acpi.h>
#include <linux/acpi_dma.h>
#include <linux/of_dma.h>
#include <linux/mempool.h>
static DEFINE_MUTEX(dma_list_mutex);
static DEFINE_IDR(dma_idr);
static LIST_HEAD(dma_device_list);
static long dmaengine_ref_count;
/* --- sysfs implementation --- */
/**
* dev_to_dma_chan - convert a device pointer to the its sysfs container object
* @dev - device node
*
* Must be called under dma_list_mutex
*/
static struct dma_chan *dev_to_dma_chan(struct device *dev)
{
struct dma_chan_dev *chan_dev;
chan_dev = container_of(dev, typeof(*chan_dev), device);
return chan_dev->chan;
}
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static ssize_t memcpy_count_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct dma_chan *chan;
unsigned long count = 0;
int i;
int err;
mutex_lock(&dma_list_mutex);
chan = dev_to_dma_chan(dev);
if (chan) {
for_each_possible_cpu(i)
count += per_cpu_ptr(chan->local, i)->memcpy_count;
err = sprintf(buf, "%lu\n", count);
} else
err = -ENODEV;
mutex_unlock(&dma_list_mutex);
return err;
}
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| Total | 99 | 100.00% | 5 | 100.00% |
static DEVICE_ATTR_RO(memcpy_count);
static ssize_t bytes_transferred_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct dma_chan *chan;
unsigned long count = 0;
int i;
int err;
mutex_lock(&dma_list_mutex);
chan = dev_to_dma_chan(dev);
if (chan) {
for_each_possible_cpu(i)
count += per_cpu_ptr(chan->local, i)->bytes_transferred;
err = sprintf(buf, "%lu\n", count);
} else
err = -ENODEV;
mutex_unlock(&dma_list_mutex);
return err;
}
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| greg kroah-hartman | greg kroah-hartman | 1 | 1.01% | 1 | 20.00% |
| andrew morton | andrew morton | 1 | 1.01% | 1 | 20.00% |
| Total | 99 | 100.00% | 5 | 100.00% |
static DEVICE_ATTR_RO(bytes_transferred);
static ssize_t in_use_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct dma_chan *chan;
int err;
mutex_lock(&dma_list_mutex);
chan = dev_to_dma_chan(dev);
if (chan)
err = sprintf(buf, "%d\n", chan->client_count);
else
err = -ENODEV;
mutex_unlock(&dma_list_mutex);
return err;
}
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static DEVICE_ATTR_RO(in_use);
static struct attribute *dma_dev_attrs[] = {
&dev_attr_memcpy_count.attr,
&dev_attr_bytes_transferred.attr,
&dev_attr_in_use.attr,
NULL,
};
ATTRIBUTE_GROUPS(dma_dev);
static void chan_dev_release(struct device *dev)
{
struct dma_chan_dev *chan_dev;
chan_dev = container_of(dev, typeof(*chan_dev), device);
if (atomic_dec_and_test(chan_dev->idr_ref)) {
mutex_lock(&dma_list_mutex);
idr_remove(&dma_idr, chan_dev->dev_id);
mutex_unlock(&dma_list_mutex);
kfree(chan_dev->idr_ref);
}
kfree(chan_dev);
}
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static struct class dma_devclass = {
.name = "dma",
.dev_groups = dma_dev_groups,
.dev_release = chan_dev_release,
};
/* --- client and device registration --- */
#define dma_device_satisfies_mask(device, mask) \
__dma_device_satisfies_mask((device), &(mask))
static int
__dma_device_satisfies_mask(struct dma_device *device,
const dma_cap_mask_t *want)
{
dma_cap_mask_t has;
bitmap_and(has.bits, want->bits, device->cap_mask.bits,
DMA_TX_TYPE_END);
return bitmap_equal(want->bits, has.bits, DMA_TX_TYPE_END);
}
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static struct module *dma_chan_to_owner(struct dma_chan *chan)
{
return chan->device->dev->driver->owner;
}
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/**
* balance_ref_count - catch up the channel reference count
* @chan - channel to balance ->client_count versus dmaengine_ref_count
*
* balance_ref_count must be called under dma_list_mutex
*/
static void balance_ref_count(struct dma_chan *chan)
{
struct module *owner = dma_chan_to_owner(chan);
while (chan->client_count < dmaengine_ref_count) {
__module_get(owner);
chan->client_count++;
}
}
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/**
* dma_chan_get - try to grab a dma channel's parent driver module
* @chan - channel to grab
*
* Must be called under dma_list_mutex
*/
static int dma_chan_get(struct dma_chan *chan)
{
struct module *owner = dma_chan_to_owner(chan);
int ret;
/* The channel is already in use, update client count */
if (chan->client_count) {
__module_get(owner);
goto out;
}
if (!try_module_get(owner))
return -ENODEV;
/* allocate upon first client reference */
if (chan->device->device_alloc_chan_resources) {
ret = chan->device->device_alloc_chan_resources(chan);
if (ret < 0)
goto err_out;
}
if (!dma_has_cap(DMA_PRIVATE, chan->device->cap_mask))
balance_ref_count(chan);
out:
chan->client_count++;
return 0;
err_out:
module_put(owner);
return ret;
}
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/**
* dma_chan_put - drop a reference to a dma channel's parent driver module
* @chan - channel to release
*
* Must be called under dma_list_mutex
*/
static void dma_chan_put(struct dma_chan *chan)
{
/* This channel is not in use, bail out */
if (!chan->client_count)
return;
chan->client_count--;
module_put(dma_chan_to_owner(chan));
/* This channel is not in use anymore, free it */
if (!chan->client_count && chan->device->device_free_chan_resources) {
/* Make sure all operations have completed */
dmaengine_synchronize(chan);
chan->device->device_free_chan_resources(chan);
}
/* If the channel is used via a DMA request router, free the mapping */
if (chan->router && chan->router->route_free) {
chan->router->route_free(chan->router->dev, chan->route_data);
chan->router = NULL;
chan->route_data = NULL;
}
}
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enum dma_status dma_sync_wait(struct dma_chan *chan, dma_cookie_t cookie)
{
enum dma_status status;
unsigned long dma_sync_wait_timeout = jiffies + msecs_to_jiffies(5000);
dma_async_issue_pending(chan);
do {
status = dma_async_is_tx_complete(chan, cookie, NULL, NULL);
if (time_after_eq(jiffies, dma_sync_wait_timeout)) {
dev_err(chan->device->dev, "%s: timeout!\n", __func__);
return DMA_ERROR;
}
if (status != DMA_IN_PROGRESS)
break;
cpu_relax();
} while (1);
return status;
}
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EXPORT_SYMBOL(dma_sync_wait);
/**
* dma_cap_mask_all - enable iteration over all operation types
*/
static dma_cap_mask_t dma_cap_mask_all;
/**
* dma_chan_tbl_ent - tracks channel allocations per core/operation
* @chan - associated channel for this entry
*/
struct dma_chan_tbl_ent {
struct dma_chan *chan;
};
/**
* channel_table - percpu lookup table for memory-to-memory offload providers
*/
static struct dma_chan_tbl_ent __percpu *channel_table[DMA_TX_TYPE_END];
static int __init dma_channel_table_init(void)
{
enum dma_transaction_type cap;
int err = 0;
bitmap_fill(dma_cap_mask_all.bits, DMA_TX_TYPE_END);
/* 'interrupt', 'private', and 'slave' are channel capabilities,
* but are not associated with an operation so they do not need
* an entry in the channel_table
*/
clear_bit(DMA_INTERRUPT, dma_cap_mask_all.bits);
clear_bit(DMA_PRIVATE, dma_cap_mask_all.bits);
clear_bit(DMA_SLAVE, dma_cap_mask_all.bits);
for_each_dma_cap_mask(cap, dma_cap_mask_all) {
channel_table[cap] = alloc_percpu(struct dma_chan_tbl_ent);
if (!channel_table[cap]) {
err = -ENOMEM;
break;
}
}
if (err) {
pr_err("initialization failure\n");
for_each_dma_cap_mask(cap, dma_cap_mask_all)
free_percpu(channel_table[cap]);
}
return err;
}
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arch_initcall(dma_channel_table_init);
/**
* dma_find_channel - find a channel to carry out the operation
* @tx_type: transaction type
*/
struct dma_chan *dma_find_channel(enum dma_transaction_type tx_type)
{
return this_cpu_read(channel_table[tx_type]->chan);
}
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EXPORT_SYMBOL(dma_find_channel);
/**
* dma_issue_pending_all - flush all pending operations across all channels
*/
void dma_issue_pending_all(void)
{
struct dma_device *device;
struct dma_chan *chan;
rcu_read_lock();
list_for_each_entry_rcu(device, &dma_device_list, global_node) {
if (dma_has_cap(DMA_PRIVATE, device->cap_mask))
continue;
list_for_each_entry(chan, &device->channels, device_node)
if (chan->client_count)
device->device_issue_pending(chan);
}
rcu_read_unlock();
}
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EXPORT_SYMBOL(dma_issue_pending_all);
/**
* dma_chan_is_local - returns true if the channel is in the same numa-node as the cpu
*/
static bool dma_chan_is_local(struct dma_chan *chan, int cpu)
{
int node = dev_to_node(chan->device->dev);
return node == -1 || cpumask_test_cpu(cpu, cpumask_of_node(node));
}
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/**
* min_chan - returns the channel with min count and in the same numa-node as the cpu
* @cap: capability to match
* @cpu: cpu index which the channel should be close to
*
* If some channels are close to the given cpu, the one with the lowest
* reference count is returned. Otherwise, cpu is ignored and only the
* reference count is taken into account.
* Must be called under dma_list_mutex.
*/
static struct dma_chan *min_chan(enum dma_transaction_type cap, int cpu)
{
struct dma_device *device;
struct dma_chan *chan;
struct dma_chan *min = NULL;
struct dma_chan *localmin = NULL;
list_for_each_entry(device, &dma_device_list, global_node) {
if (!dma_has_cap(cap, device->cap_mask) ||
dma_has_cap(DMA_PRIVATE, device->cap_mask))
continue;
list_for_each_entry(chan, &device->channels, device_node) {
if (!chan->client_count)
continue;
if (!min || chan->table_count < min->table_count)
min = chan;
if (dma_chan_is_local(chan, cpu))
if (!localmin ||
chan->table_count < localmin->table_count)
localmin = chan;
}
}
chan = localmin ? localmin : min;
if (chan)
chan->table_count++;
return chan;
}
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| Total | 152 | 100.00% | 3 | 100.00% |
/**
* dma_channel_rebalance - redistribute the available channels
*
* Optimize for cpu isolation (each cpu gets a dedicated channel for an
* operation type) in the SMP case, and operation isolation (avoid
* multi-tasking channels) in the non-SMP case. Must be called under
* dma_list_mutex.
*/
static void dma_channel_rebalance(void)
{
struct dma_chan *chan;
struct dma_device *device;
int cpu;
int cap;
/* undo the last distribution */
for_each_dma_cap_mask(cap, dma_cap_mask_all)
for_each_possible_cpu(cpu)
per_cpu_ptr(channel_table[cap], cpu)->chan = NULL;
list_for_each_entry(device, &dma_device_list, global_node) {
if (dma_has_cap(DMA_PRIVATE, device->cap_mask))
continue;
list_for_each_entry(chan, &device->channels, device_node)
chan->table_count = 0;
}
/* don't populate the channel_table if no clients are available */
if (!dmaengine_ref_count)
return;
/* redistribute available channels */
for_each_dma_cap_mask(cap, dma_cap_mask_all)
for_each_online_cpu(cpu) {
chan = min_chan(cap, cpu);
per_cpu_ptr(channel_table[cap], cpu)->chan = chan;
}
}
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int dma_get_slave_caps(struct dma_chan *chan, struct dma_slave_caps *caps)
{
struct dma_device *device;
if (!chan || !caps)
return -EINVAL;
device = chan->device;
/* check if the channel supports slave transactions */
if (!(test_bit(DMA_SLAVE, device->cap_mask.bits) ||
test_bit(DMA_CYCLIC, device->cap_mask.bits)))
return -ENXIO;
/*
* Check whether it reports it uses the generic slave
* capabilities, if not, that means it doesn't support any
* kind of slave capabilities reporting.
*/
if (!device->directions)
return -ENXIO;
caps->src_addr_widths = device->src_addr_widths;
caps->dst_addr_widths = device->dst_addr_widths;
caps->directions = device->directions;
caps->max_burst = device->max_burst;
caps->residue_granularity = device->residue_granularity;
caps->descriptor_reuse = device->descriptor_reuse;
/*
* Some devices implement only pause (e.g. to get residuum) but no
* resume. However cmd_pause is advertised as pause AND resume.
*/
caps->cmd_pause = !!(device->device_pause && device->device_resume);
caps->cmd_terminate = !!device->device_terminate_all;
return 0;
}
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EXPORT_SYMBOL_GPL(dma_get_slave_caps);
static struct dma_chan *private_candidate(const dma_cap_mask_t *mask,
struct dma_device *dev,
dma_filter_fn fn, void *fn_param)
{
struct dma_chan *chan;
if (mask && !__dma_device_satisfies_mask(dev, mask)) {
dev_dbg(dev->dev, "%s: wrong capabilities\n", __func__);
return NULL;
}
/* devices with multiple channels need special handling as we need to
* ensure that all channels are either private or public.
*/
if (dev->chancnt > 1 && !dma_has_cap(DMA_PRIVATE, dev->cap_mask))
list_for_each_entry(chan, &dev->channels, device_node) {
/* some channels are already publicly allocated */
if (chan->client_count)
return NULL;
}
list_for_each_entry(chan, &dev->channels, device_node) {
if (chan->client_count) {
dev_dbg(dev->dev, "%s: %s busy\n",
__func__, dma_chan_name(chan));
continue;
}
if (fn && !fn(chan, fn_param)) {
dev_dbg(dev->dev, "%s: %s filter said false\n",
__func__, dma_chan_name(chan));
continue;
}
return chan;
}
return NULL;
}
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| Total | 169 | 100.00% | 8 | 100.00% |
static struct dma_chan *find_candidate(struct dma_device *device,
const dma_cap_mask_t *mask,
dma_filter_fn fn, void *fn_param)
{
struct dma_chan *chan = private_candidate(mask, device, fn, fn_param);
int err;
if (chan) {
/* Found a suitable channel, try to grab, prep, and return it.
* We first set DMA_PRIVATE to disable balance_ref_count as this
* channel will not be published in the general-purpose
* allocator
*/
dma_cap_set(DMA_PRIVATE, device->cap_mask);
device->privatecnt++;
err = dma_chan_get(chan);
if (err) {
if (err == -ENODEV) {
dev_dbg(device->dev, "%s: %s module removed\n",
__func__, dma_chan_name(chan));
list_del_rcu(&device->global_node);
} else
dev_dbg(device->dev,
"%s: failed to get %s: (%d)\n",
__func__, dma_chan_name(chan), err);
if (--device->privatecnt == 0)
dma_cap_clear(DMA_PRIVATE, device->cap_mask);
chan = ERR_PTR(err);
}
}
return chan ? chan : ERR_PTR(-EPROBE_DEFER);
}
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/**
* dma_get_slave_channel - try to get specific channel exclusively
* @chan: target channel
*/
struct dma_chan *dma_get_slave_channel(struct dma_chan *chan)
{
int err = -EBUSY;
/* lock against __dma_request_channel */
mutex_lock(&dma_list_mutex);
if (chan->client_count == 0) {
struct dma_device *device = chan->device;
dma_cap_set(DMA_PRIVATE, device->cap_mask);
device->privatecnt++;
err = dma_chan_get(chan);
if (err) {
dev_dbg(chan->device->dev,
"%s: failed to get %s: (%d)\n",
__func__, dma_chan_name(chan), err);
chan = NULL;
if (--device->privatecnt == 0)
dma_cap_clear(DMA_PRIVATE, device->cap_mask);
}
} else
chan = NULL;
mutex_unlock(&dma_list_mutex);
return chan;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| zhangfei gao | zhangfei gao | 60 | 47.24% | 1 | 25.00% |
| peter ujfalusi | peter ujfalusi | 47 | 37.01% | 1 | 25.00% |
| vinod koul | vinod koul | 13 | 10.24% | 1 | 25.00% |
| jarkko nikula | jarkko nikula | 7 | 5.51% | 1 | 25.00% |
| Total | 127 | 100.00% | 4 | 100.00% |
EXPORT_SYMBOL_GPL(dma_get_slave_channel);
struct dma_chan *dma_get_any_slave_channel(struct dma_device *device)
{
dma_cap_mask_t mask;
struct dma_chan *chan;
dma_cap_zero(mask);
dma_cap_set(DMA_SLAVE, mask);
/* lock against __dma_request_channel */
mutex_lock(&dma_list_mutex);
chan = find_candidate(device, &mask, NULL, NULL);
mutex_unlock(&dma_list_mutex);
return IS_ERR(chan) ? NULL : chan;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| stephen warren | stephen warren | 57 | 82.61% | 1 | 33.33% |
| peter ujfalusi | peter ujfalusi | 10 | 14.49% | 1 | 33.33% |
| christopher freeman | christopher freeman | 2 | 2.90% | 1 | 33.33% |
| Total | 69 | 100.00% | 3 | 100.00% |
EXPORT_SYMBOL_GPL(dma_get_any_slave_channel);
/**
* __dma_request_channel - try to allocate an exclusive channel
* @mask: capabilities that the channel must satisfy
* @fn: optional callback to disposition available channels
* @fn_param: opaque parameter to pass to dma_filter_fn
*
* Returns pointer to appropriate DMA channel on success or NULL.
*/
struct dma_chan *__dma_request_channel(const dma_cap_mask_t *mask,
dma_filter_fn fn, void *fn_param)
{
struct dma_device *device, *_d;
struct dma_chan *chan = NULL;
/* Find a channel */
mutex_lock(&dma_list_mutex);
list_for_each_entry_safe(device, _d, &dma_device_list, global_node) {
chan = find_candidate(device, mask, fn, fn_param);
if (!IS_ERR(chan))
break;
chan = NULL;
}
mutex_unlock(&dma_list_mutex);
pr_debug("%s: %s (%s)\n",
__func__,
chan ? "success" : "fail",
chan ? dma_chan_name(chan) : NULL);
return chan;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| dan williams | dan williams | 99 | 90.00% | 5 | 55.56% |
| peter ujfalusi | peter ujfalusi | 5 | 4.55% | 1 | 11.11% |
| chris leech | chris leech | 4 | 3.64% | 1 | 11.11% |
| jarkko nikula | jarkko nikula | 1 | 0.91% | 1 | 11.11% |
| lars-peter clausen | lars-peter clausen | 1 | 0.91% | 1 | 11.11% |
| Total | 110 | 100.00% | 9 | 100.00% |
EXPORT_SYMBOL_GPL(__dma_request_channel);
static const struct dma_slave_map *dma_filter_match(struct dma_device *device,
const char *name,
struct device *dev)
{
int i;
if (!device->filter.mapcnt)
return NULL;
for (i = 0; i < device->filter.mapcnt; i++) {
const struct dma_slave_map *map = &device->filter.map[i];
if (!strcmp(map->devname, dev_name(dev)) &&
!strcmp(map->slave, name))
return map;
}
return NULL;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| peter ujfalusi | peter ujfalusi | 105 | 100.00% | 1 | 100.00% |
| Total | 105 | 100.00% | 1 | 100.00% |
/**
* dma_request_chan - try to allocate an exclusive slave channel
* @dev: pointer to client device structure
* @name: slave channel name
*
* Returns pointer to appropriate DMA channel on success or an error pointer.
*/
struct dma_chan *dma_request_chan(struct device *dev, const char *name)
{
struct dma_device *d, *_d;
struct dma_chan *chan = NULL;
/* If device-tree is present get slave info from here */
if (dev->of_node)
chan = of_dma_request_slave_channel(dev->of_node, name);
/* If device was enumerated by ACPI get slave info from here */
if (has_acpi_companion(dev) && !chan)
chan = acpi_dma_request_slave_chan_by_name(dev, name);
if (chan) {
/* Valid channel found or requester need to be deferred */
if (!IS_ERR(chan) || PTR_ERR(chan) == -EPROBE_DEFER)
return chan;
}
/* Try to find the channel via the DMA filter map(s) */
mutex_lock(&dma_list_mutex);
list_for_each_entry_safe(d, _d, &dma_device_list, global_node) {
dma_cap_mask_t mask;
const struct dma_slave_map *map = dma_filter_match(d, name, dev);
if (!map)
continue;
dma_cap_zero(mask);
dma_cap_set(DMA_SLAVE, mask);
chan = find_candidate(d, &mask, d->filter.fn, map->param);
if (!IS_ERR(chan))
break;
}
mutex_unlock(&dma_list_mutex);
return chan ? chan : ERR_PTR(-EPROBE_DEFER);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| peter ujfalusi | peter ujfalusi | 146 | 74.11% | 1 | 20.00% |
| jon hunter | jon hunter | 29 | 14.72% | 1 | 20.00% |
| andy shevchenko | andy shevchenko | 14 | 7.11% | 1 | 20.00% |
| stephen warren | stephen warren | 7 | 3.55% | 1 | 20.00% |
| markus pargmann | markus pargmann | 1 | 0.51% | 1 | 20.00% |
| Total | 197 | 100.00% | 5 | 100.00% |
EXPORT_SYMBOL_GPL(dma_request_chan);
/**
* dma_request_slave_channel - try to allocate an exclusive slave channel
* @dev: pointer to client device structure
* @name: slave channel name
*
* Returns pointer to appropriate DMA channel on success or NULL.
*/
struct dma_chan *dma_request_slave_channel(struct device *dev,
const char *name)
{
struct dma_chan *ch = dma_request_chan(dev, name);
if (IS_ERR(ch))
return NULL;
return ch;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| stephen warren | stephen warren | 34 | 80.95% | 1 | 33.33% |
| peter ujfalusi | peter ujfalusi | 5 | 11.90% | 1 | 33.33% |
| jon hunter | jon hunter | 3 | 7.14% | 1 | 33.33% |
| Total | 42 | 100.00% | 3 | 100.00% |
EXPORT_SYMBOL_GPL(dma_request_slave_channel);
/**
* dma_request_chan_by_mask - allocate a channel satisfying certain capabilities
* @mask: capabilities that the channel must satisfy
*
* Returns pointer to appropriate DMA channel on success or an error pointer.
*/
struct dma_chan *dma_request_chan_by_mask(const dma_cap_mask_t *mask)
{
struct dma_chan *chan;
if (!mask)
return ERR_PTR(-ENODEV);
chan = __dma_request_channel(mask, NULL, NULL);
if (!chan)
chan = ERR_PTR(-ENODEV);
return chan;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| peter ujfalusi | peter ujfalusi | 49 | 87.50% | 1 | 25.00% |
| robert baldyga | robert baldyga | 4 | 7.14% | 1 | 25.00% |
| stephen warren | stephen warren | 2 | 3.57% | 1 | 25.00% |
| jon hunter | jon hunter | 1 | 1.79% | 1 | 25.00% |
| Total | 56 | 100.00% | 4 | 100.00% |
EXPORT_SYMBOL_GPL(dma_request_chan_by_mask);
void dma_release_channel(struct dma_chan *chan)
{
mutex_lock(&dma_list_mutex);
WARN_ONCE(chan->client_count != 1,
"chan reference count %d != 1\n", chan->client_count);
dma_chan_put(chan);
/* drop PRIVATE cap enabled by __dma_request_channel() */
if (--chan->device->privatecnt == 0)
dma_cap_clear(DMA_PRIVATE, chan->device->cap_mask);
mutex_unlock(&dma_list_mutex);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| dan williams | dan williams | 42 | 64.62% | 1 | 50.00% |
| atsushi nemoto | atsushi nemoto | 23 | 35.38% | 1 | 50.00% |
| Total | 65 | 100.00% | 2 | 100.00% |
EXPORT_SYMBOL_GPL(dma_release_channel);
/**
* dmaengine_get - register interest in dma_channels
*/
void dmaengine_get(void)
{
struct dma_device *device, *_d;
struct dma_chan *chan;
int err;
mutex_lock(&dma_list_mutex);
dmaengine_ref_count++;
/* try to grab channels */
list_for_each_entry_safe(device, _d, &dma_device_list, global_node) {
if (dma_has_cap(DMA_PRIVATE, device->cap_mask))
continue;
list_for_each_entry(chan, &device->channels, device_node) {
err = dma_chan_get(chan);
if (err == -ENODEV) {
/* module removed before we could use it */
list_del_rcu(&device->global_node);
break;
} else if (err)
dev_dbg(chan->device->dev,
"%s: failed to get %s: (%d)\n",
__func__, dma_chan_name(chan), err);
}
}
/* if this is the first reference and there were channels
* waiting we need to rebalance to get those channels
* incorporated into the channel table
*/
if (dmaengine_ref_count == 1)
dma_channel_rebalance();
mutex_unlock(&dma_list_mutex);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| dan williams | dan williams | 100 | 74.63% | 8 | 66.67% |
| chris leech | chris leech | 22 | 16.42% | 1 | 8.33% |
| jarkko nikula | jarkko nikula | 7 | 5.22% | 1 | 8.33% |
| fabio estevam | fabio estevam | 3 | 2.24% | 1 | 8.33% |
| haavard skinnemoen | haavard skinnemoen | 2 | 1.49% | 1 | 8.33% |
| Total | 134 | 100.00% | 12 | 100.00% |
EXPORT_SYMBOL(dmaengine_get);
/**
* dmaengine_put - let dma drivers be removed when ref_count == 0
*/
void dmaengine_put(void)
{
struct dma_device *device;
struct dma_chan *chan;
mutex_lock(&dma_list_mutex);
dmaengine_ref_count--;
BUG_ON(dmaengine_ref_count < 0);
/* drop channel references */
list_for_each_entry(device, &dma_device_list, global_node) {
if (dma_has_cap(DMA_PRIVATE, device->cap_mask))
continue;
list_for_each_entry(chan, &device->channels, device_node)
dma_chan_put(chan);
}
mutex_unlock(&dma_list_mutex);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| dan williams | dan williams | 52 | 69.33% | 4 | 80.00% |
| chris leech | chris leech | 23 | 30.67% | 1 | 20.00% |
| Total | 75 | 100.00% | 5 | 100.00% |
EXPORT_SYMBOL(dmaengine_put);
static bool device_has_all_tx_types(struct dma_device *device)
{
/* A device that satisfies this test has channels that will never cause
* an async_tx channel switch event as all possible operation types can
* be handled.
*/
#ifdef CONFIG_ASYNC_TX_DMA
if (!dma_has_cap(DMA_INTERRUPT, device->cap_mask))
return false;
#endif
#if IS_ENABLED(CONFIG_ASYNC_MEMCPY)
if (!dma_has_cap(DMA_MEMCPY, device->cap_mask))
return false;
#endif
#if IS_ENABLED(CONFIG_ASYNC_XOR)
if (!dma_has_cap(DMA_XOR, device->cap_mask))
return false;
#ifndef CONFIG_ASYNC_TX_DISABLE_XOR_VAL_DMA
if (!dma_has_cap(DMA_XOR_VAL, device->cap_mask))
return false;
#endif
#endif
#if IS_ENABLED(CONFIG_ASYNC_PQ)
if (!dma_has_cap(DMA_PQ, device->cap_mask))
return false;
#ifndef CONFIG_ASYNC_TX_DISABLE_PQ_VAL_DMA
if (!dma_has_cap(DMA_PQ_VAL, device->cap_mask))
return false;
#endif
#endif
return true;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| dan williams | dan williams | 141 | 97.92% | 3 | 75.00% |
| javier martinez canillas | javier martinez canillas | 3 | 2.08% | 1 | 25.00% |
| Total | 144 | 100.00% | 4 | 100.00% |
static int get_dma_id(struct dma_device *device)
{
int rc;
mutex_lock(&dma_list_mutex);
rc = idr_alloc(&dma_idr, NULL, 0, 0, GFP_KERNEL);
if (rc >= 0)
device->dev_id = rc;
mutex_unlock(&dma_list_mutex);
return rc < 0 ? rc : 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| dan williams | dan williams | 43 | 68.25% | 1 | 50.00% |
| tejun heo | tejun heo | 20 | 31.75% | 1 | 50.00% |
| Total | 63 | 100.00% | 2 | 100.00% |
/**
* dma_async_device_register - registers DMA devices found
* @device: &dma_device
*/
int dma_async_device_register(struct dma_device *device)
{
int chancnt = 0, rc;
struct dma_chan* chan;
atomic_t *idr_ref;
if (!device)
return -ENODEV;
/* validate device routines */
BUG_ON(dma_has_cap(DMA_MEMCPY, device->cap_mask) &&
!device->device_prep_dma_memcpy);
BUG_ON(dma_has_cap(DMA_XOR, device->cap_mask) &&
!device->device_prep_dma_xor);
BUG_ON(dma_has_cap(DMA_XOR_VAL, device->cap_mask) &&
!device->device_prep_dma_xor_val);
BUG_ON(dma_has_cap(DMA_PQ, device->cap_mask) &&
!device->device_prep_dma_pq);
BUG_ON(dma_has_cap(DMA_PQ_VAL, device->cap_mask) &&
!device->device_prep_dma_pq_val);
BUG_ON(dma_has_cap(DMA_MEMSET, device->cap_mask) &&
!device->device_prep_dma_memset);
BUG_ON(dma_has_cap(DMA_INTERRUPT, device->cap_mask) &&
!device->device_prep_dma_interrupt);
BUG_ON(dma_has_cap(DMA_SG, device->cap_mask) &&
!device->device_prep_dma_sg);
BUG_ON(dma_has_cap(DMA_CYCLIC, device->cap_mask) &&
!device->device_prep_dma_cyclic);
BUG_ON(dma_has_cap(DMA_INTERLEAVE, device->cap_mask) &&
!device->device_prep_interleaved_dma);
BUG_ON(!device->device_tx_status);
BUG_ON(!device->device_issue_pending);
BUG_ON(!device->dev);
/* note: this only matters in the
* CONFIG_ASYNC_TX_ENABLE_CHANNEL_SWITCH=n case
*/
if (device_has_all_tx_types(device))
dma_cap_set(DMA_ASYNC_TX, device->cap_mask);
idr_ref = kmalloc(sizeof(*idr_ref), GFP_KERNEL);
if (!idr_ref)
return -ENOMEM;
rc = get_dma_id(device);
if (rc != 0) {
kfree(idr_ref);
return rc;
}
atomic_set(idr_ref, 0);
/* represent channels in sysfs. Probably want devs too */
list_for_each_entry(chan, &device->channels, device_node) {
rc = -ENOMEM;
chan->local = alloc_percpu(typeof(*chan->local));
if (chan->local == NULL)
goto err_out;
chan->dev = kzalloc(sizeof(*chan->dev), GFP_KERNEL);
if (chan->dev == NULL) {
free_percpu(chan->local);
chan->local = NULL;
goto err_out;
}
chan->chan_id = chancnt++;
chan->dev->device.class = &dma_devclass;
chan->dev->device.parent = device->dev;
chan->dev->chan = chan;
chan->dev->idr_ref = idr_ref;
chan->dev->dev_id = device->dev_id;
atomic_inc(idr_ref);
dev_set_name(&chan->dev->device, "dma%dchan%d",
device->dev_id, chan->chan_id);
rc = device_register(&chan->dev->device);
if (rc) {
free_percpu(chan->local);
chan->local = NULL;
kfree(chan->dev);
atomic_dec(idr_ref);
goto err_out;
}
chan->client_count = 0;
}
device->chancnt = chancnt;
mutex_lock(&dma_list_mutex);
/* take references on public channels */
if (dmaengine_ref_count && !dma_has_cap(DMA_PRIVATE, device->cap_mask))
list_for_each_entry(chan, &device->channels, device_node) {
/* if clients are already waiting for channels we need
* to take references on their behalf
*/
if (dma_chan_get(chan) == -ENODEV) {
/* note we can only get here for the first
* channel as the remaining channels are
* guaranteed to get a reference
*/
rc = -ENODEV;
mutex_unlock(&dma_list_mutex);
goto err_out;
}
}
list_add_tail_rcu(&device->global_node, &dma_device_list);
if (dma_has_cap(DMA_PRIVATE, device->cap_mask))
device->privatecnt++; /* Always private */
dma_channel_rebalance();
mutex_unlock(&dma_list_mutex);
return 0;
err_out:
/* if we never registered a channel just release the idr */
if (atomic_read(idr_ref) == 0) {
mutex_lock(&dma_list_mutex);
idr_remove(&dma_idr, device->dev_id);
mutex_unlock(&dma_list_mutex);
kfree(idr_ref);
return rc;
}
list_for_each_entry(chan, &device->channels, device_node) {
if (chan->local == NULL)
continue;
mutex_lock(&dma_list_mutex);
chan->dev->chan = NULL;
mutex_unlock(&dma_list_mutex);
device_unregister(&chan->dev->device);
free_percpu(chan->local);
}
return rc;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| dan williams | dan williams | 432 | 59.59% | 15 | 55.56% |
| chris leech | chris leech | 132 | 18.21% | 1 | 3.70% |
| jeff garzik | jeff garzik | 61 | 8.41% | 1 | 3.70% |
| haavard skinnemoen | haavard skinnemoen | 33 | 4.55% | 2 | 7.41% |
| maxime ripard | maxime ripard | 17 | 2.34% | 1 | 3.70% |
| ira w. snyder | ira w. snyder | 17 | 2.34% | 1 | 3.70% |
| atsushi nemoto | atsushi nemoto | 17 | 2.34% | 1 | 3.70% |
| tony jones | tony jones | 8 | 1.10% | 1 | 3.70% |
| jassi brar | jassi brar | 4 | 0.55% | 1 | 3.70% |
| kay sievers | kay sievers | 2 | 0.28% | 1 | 3.70% |
| linus walleij | linus walleij | 1 | 0.14% | 1 | 3.70% |
| wei zhang | wei zhang | 1 | 0.14% | 1 | 3.70% |
| Total | 725 | 100.00% | 27 | 100.00% |
EXPORT_SYMBOL(dma_async_device_register);
/**
* dma_async_device_unregister - unregister a DMA device
* @device: &dma_device
*
* This routine is called by dma driver exit routines, dmaengine holds module
* references to prevent it being called while channels are in use.
*/
void dma_async_device_unregister(struct dma_device *device)
{
struct dma_chan *chan;
mutex_lock(&dma_list_mutex);
list_del_rcu(&device->global_node);
dma_channel_rebalance();
mutex_unlock(&dma_list_mutex);
list_for_each_entry(chan, &device->channels, device_node) {
WARN_ONCE(chan->client_count,
"%s called while %d clients hold a reference\n",
__func__, chan->client_count);
mutex_lock(&dma_list_mutex);
chan->dev->chan = NULL;
mutex_unlock(&dma_list_mutex);
device_unregister(&chan->dev->device);
free_percpu(chan->local);
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| chris leech | chris leech | 54 | 54.00% | 1 | 14.29% |
| dan williams | dan williams | 37 | 37.00% | 4 | 57.14% |
| anatolij gustschin | anatolij gustschin | 7 | 7.00% | 1 | 14.29% |
| tony jones | tony jones | 2 | 2.00% | 1 | 14.29% |
| Total | 100 | 100.00% | 7 | 100.00% |
EXPORT_SYMBOL(dma_async_device_unregister);
struct dmaengine_unmap_pool {
struct kmem_cache *cache;
const char *name;
mempool_t *pool;
size_t size;
};
#define __UNMAP_POOL(x) { .size = x, .name = "dmaengine-unmap-" __stringify(x) }
static struct dmaengine_unmap_pool unmap_pool[] = {
__UNMAP_POOL(2),
#if IS_ENABLED(CONFIG_DMA_ENGINE_RAID)
__UNMAP_POOL(16),
__UNMAP_POOL(128),
__UNMAP_POOL(256),
#endif
};
static struct dmaengine_unmap_pool *__get_unmap_pool(int nr)
{
int order = get_count_order(nr);
switch (order) {
case 0 ... 1:
return &unmap_pool[0];
case 2 ... 4:
return &unmap_pool[1];
case 5 ... 7:
return &unmap_pool[2];
case 8:
return &unmap_pool[3];
default:
BUG();
return NULL;
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| dan williams | dan williams | 78 | 100.00% | 3 | 100.00% |
| Total | 78 | 100.00% | 3 | 100.00% |
static void dmaengine_unmap(struct kref *kref)
{
struct dmaengine_unmap_data *unmap = container_of(kref, typeof(*unmap), kref);
struct device *dev = unmap->dev;
int cnt, i;
cnt = unmap->to_cnt;
for (i = 0; i < cnt; i++)
dma_unmap_page(dev, unmap->addr[i], unmap->len,
DMA_TO_DEVICE);
cnt += unmap->from_cnt;
for (; i < cnt; i++)
dma_unmap_page(dev, unmap->addr[i], unmap->len,
DMA_FROM_DEVICE);
cnt += unmap->bidi_cnt;
for (; i < cnt; i++) {
if (unmap->addr[i] == 0)
continue;
dma_unmap_page(dev, unmap->addr[i], unmap->len,
DMA_BIDIRECTIONAL);
}
cnt = unmap->map_cnt;
mempool_free(unmap, __get_unmap_pool(cnt)->pool);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| dan williams | dan williams | 173 | 96.11% | 5 | 71.43% |
| xuelin shi | xuelin shi | 6 | 3.33% | 1 | 14.29% |
| maciej sosnowski | maciej sosnowski | 1 | 0.56% | 1 | 14.29% |
| Total | 180 | 100.00% | 7 | 100.00% |
void dmaengine_unmap_put(struct dmaengine_unmap_data *unmap)
{
if (unmap)
kref_put(&unmap->kref, dmaengine_unmap);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| dan williams | dan williams | 22 | 91.67% | 2 | 66.67% |
| christoph lameter | christoph lameter | 2 | 8.33% | 1 | 33.33% |
| Total | 24 | 100.00% | 3 | 100.00% |
EXPORT_SYMBOL_GPL(dmaengine_unmap_put);
static void dmaengine_destroy_unmap_pool(void)
{
int i;
for (i = 0; i < ARRAY_SIZE(unmap_pool); i++) {
struct dmaengine_unmap_pool *p = &unmap_pool[i];
mempool_destroy(p->pool);
p->pool = NULL;
kmem_cache_destroy(p->cache);
p->cache = NULL;
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| dan williams | dan williams | 63 | 95.45% | 3 | 75.00% |
| maciej sosnowski | maciej sosnowski | 3 | 4.55% | 1 | 25.00% |
| Total | 66 | 100.00% | 4 | 100.00% |
static int __init dmaengine_init_unmap_pool(void)
{
int i;
for (i = 0; i < ARRAY_SIZE(unmap_pool); i++) {
struct dmaengine_unmap_pool *p = &unmap_pool[i];
size_t size;
size = sizeof(struct dmaengine_unmap_data) +
sizeof(dma_addr_t) * p->size;
p->cache = kmem_cache_create(p->name, size, 0,
SLAB_HWCACHE_ALIGN, NULL);
if (!p->cache)
break;
p->pool = mempool_create_slab_pool(1, p->cache);
if (!p->pool)
break;
}
if (i == ARRAY_SIZE(unmap_pool))
return 0;
dmaengine_destroy_unmap_pool();
return -ENOMEM;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| dan williams | dan williams | 128 | 100.00% | 3 | 100.00% |
| Total | 128 | 100.00% | 3 | 100.00% |
struct dmaengine_unmap_data *
dmaengine_get_unmap_data(struct device *dev, int nr, gfp_t flags)
{
struct dmaengine_unmap_data *unmap;
unmap = mempool_alloc(__get_unmap_pool(nr)->pool, flags);
if (!unmap)
return NULL;
memset(unmap, 0, sizeof(*unmap));
kref_init(&unmap->kref);
unmap->dev = dev;
unmap->map_cnt = nr;
return unmap;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| dan williams | dan williams | 72 | 88.89% | 2 | 50.00% |
| xuelin shi | xuelin shi | 6 | 7.41% | 1 | 25.00% |
| christoph lameter | christoph lameter | 3 | 3.70% | 1 | 25.00% |
| Total | 81 | 100.00% | 4 | 100.00% |
EXPORT_SYMBOL(dmaengine_get_unmap_data);
void dma_async_tx_descriptor_init(struct dma_async_tx_descriptor *tx,
struct dma_chan *chan)
{
tx->chan = chan;
#ifdef CONFIG_ASYNC_TX_ENABLE_CHANNEL_SWITCH
spin_lock_init(&tx->lock);
#endif
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| dan williams | dan williams | 34 | 100.00% | 3 | 100.00% |
| Total | 34 | 100.00% | 3 | 100.00% |
EXPORT_SYMBOL(dma_async_tx_descriptor_init);
/* dma_wait_for_async_tx - spin wait for a transaction to complete
* @tx: in-flight transaction to wait on
*/
enum dma_status
dma_wait_for_async_tx(struct dma_async_tx_descriptor *tx)
{
unsigned long dma_sync_wait_timeout = jiffies + msecs_to_jiffies(5000);
if (!tx)
return DMA_COMPLETE;
while (tx->cookie == -EBUSY) {
if (time_after_eq(jiffies, dma_sync_wait_timeout)) {
dev_err(tx->chan->device->dev,
"%s timeout waiting for descriptor submission\n",
__func__);
return DMA_ERROR;
}
cpu_relax();
}
return dma_sync_wait(tx->chan, tx->cookie);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| dan williams | dan williams | 75 | 88.24% | 2 | 50.00% |
| jarkko nikula | jarkko nikula | 9 | 10.59% | 1 | 25.00% |
| vinod koul | vinod koul | 1 | 1.18% | 1 | 25.00% |
| Total | 85 | 100.00% | 4 | 100.00% |
EXPORT_SYMBOL_GPL(dma_wait_for_async_tx);
/* dma_run_dependencies - helper routine for dma drivers to process
* (start) dependent operations on their target channel
* @tx: transaction with dependencies
*/
void dma_run_dependencies(struct dma_async_tx_descriptor *tx)
{
struct dma_async_tx_descriptor *dep = txd_next(tx);
struct dma_async_tx_descriptor *dep_next;
struct dma_chan *chan;
if (!dep)
return;
/* we'll submit tx->next now, so clear the link */
txd_clear_next(tx);
chan = dep->chan;
/* keep submitting up until a channel switch is detected
* in that case we will be called again as a result of
* processing the interrupt from async_tx_channel_switch
*/
for (; dep; dep = dep_next) {
txd_lock(dep);
txd_clear_parent(dep);
dep_next = txd_next(dep);
if (dep_next && dep_next->chan == chan)
txd_clear_next(dep); /* ->next will be submitted */
else
dep_next = NULL; /* submit current dep and terminate */
txd_unlock(dep);
dep->tx_submit(dep);
}
chan->device->device_issue_pending(chan);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| dan williams | dan williams | 117 | 97.50% | 2 | 66.67% |
| yuri tikhonov | yuri tikhonov | 3 | 2.50% | 1 | 33.33% |
| Total | 120 | 100.00% | 3 | 100.00% |
EXPORT_SYMBOL_GPL(dma_run_dependencies);
static int __init dma_bus_init(void)
{
int err = dmaengine_init_unmap_pool();
if (err)
return err;
return class_register(&dma_devclass);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| chris leech | chris leech | 16 | 55.17% | 1 | 50.00% |
| dan williams | dan williams | 13 | 44.83% | 1 | 50.00% |
| Total | 29 | 100.00% | 2 | 100.00% |
arch_initcall(dma_bus_init);
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| dan williams | dan williams | 3036 | 59.71% | 30 | 33.33% |
| peter ujfalusi | peter ujfalusi | 580 | 11.41% | 5 | 5.56% |
| chris leech | chris leech | 471 | 9.26% | 1 | 1.11% |
| laurent pinchart | laurent pinchart | 129 | 2.54% | 1 | 1.11% |
| stephen warren | stephen warren | 111 | 2.18% | 2 | 2.22% |
| brice goglin | brice goglin | 79 | 1.55% | 1 | 1.11% |
| maxime ripard | maxime ripard | 73 | 1.44% | 3 | 3.33% |
| zhangfei gao | zhangfei gao | 65 | 1.28% | 1 | 1.11% |
| jeff garzik | jeff garzik | 61 | 1.20% | 1 | 1.11% |
| jarkko nikula | jarkko nikula | 57 | 1.12% | 3 | 3.33% |
| greg kroah-hartman | greg kroah-hartman | 45 | 0.88% | 1 | 1.11% |
| jon hunter | jon hunter | 40 | 0.79% | 1 | 1.11% |
| atsushi nemoto | atsushi nemoto | 40 | 0.79% | 1 | 1.11% |
| haavard skinnemoen | haavard skinnemoen | 35 | 0.69% | 2 | 2.22% |
| tony jones | tony jones | 32 | 0.63% | 1 | 1.11% |
| vinod koul | vinod koul | 26 | 0.51% | 3 | 3.33% |
| tejun heo | tejun heo | 24 | 0.47% | 3 | 3.33% |
| andy shevchenko | andy shevchenko | 21 | 0.41% | 2 | 2.22% |
| david brownell | david brownell | 18 | 0.35% | 1 | 1.11% |
| ira w. snyder | ira w. snyder | 17 | 0.33% | 1 | 1.11% |
| xuelin shi | xuelin shi | 12 | 0.24% | 1 | 1.11% |
| lars-peter clausen | lars-peter clausen | 11 | 0.22% | 2 | 2.22% |
| bartlomiej zolnierkiewicz | bartlomiej zolnierkiewicz | 11 | 0.22% | 1 | 1.11% |
| joe perches | joe perches | 11 | 0.22% | 1 | 1.11% |
| robert jarzmik | robert jarzmik | 8 | 0.16% | 1 | 1.11% |
| shawn lin | shawn lin | 8 | 0.16% | 1 | 1.11% |
| christoph lameter | christoph lameter | 8 | 0.16% | 1 | 1.11% |
| krzysztof kozlowski | krzysztof kozlowski | 7 | 0.14% | 1 | 1.11% |
| anatolij gustschin | anatolij gustschin | 7 | 0.14% | 1 | 1.11% |
| axel lin | axel lin | 6 | 0.12% | 1 | 1.11% |
| robert baldyga | robert baldyga | 5 | 0.10% | 1 | 1.11% |
| jassi brar | jassi brar | 4 | 0.08% | 1 | 1.11% |
| maciej sosnowski | maciej sosnowski | 4 | 0.08% | 1 | 1.11% |
| yuri tikhonov | yuri tikhonov | 3 | 0.06% | 1 | 1.11% |
| javier martinez canillas | javier martinez canillas | 3 | 0.06% | 1 | 1.11% |
| fabio estevam | fabio estevam | 3 | 0.06% | 1 | 1.11% |
| alexey dobriyan | alexey dobriyan | 3 | 0.06% | 1 | 1.11% |
| kay sievers | kay sievers | 2 | 0.04% | 1 | 1.11% |
| christopher freeman | christopher freeman | 2 | 0.04% | 1 | 1.11% |
| andrew morton | andrew morton | 2 | 0.04% | 1 | 1.11% |
| randy dunlap | randy dunlap | 1 | 0.02% | 1 | 1.11% |
| wei zhang | wei zhang | 1 | 0.02% | 1 | 1.11% |
| stefan agner | stefan agner | 1 | 0.02% | 1 | 1.11% |
| markus pargmann | markus pargmann | 1 | 0.02% | 1 | 1.11% |
| linus walleij | linus walleij | 1 | 0.02% | 1 | 1.11% |
| Total | 5085 | 100.00% | 90 | 100.00% |
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