mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-21 16:29:59 +00:00
![Thomas Gleixner](/assets/img/avatar_default.png)
Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms and conditions of the gnu general public license version 2 as published by the free software foundation this program is distributed in the hope 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 program is free software you can redistribute it and or modify it under the terms and conditions of the gnu general public license version 2 as published by the free software foundation 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 57 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190529141901.515993066@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
165 lines
4.3 KiB
C
165 lines
4.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Intel I/OAT DMA Linux driver
|
|
* Copyright(c) 2004 - 2015 Intel Corporation.
|
|
*/
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/module.h>
|
|
#include <linux/dmaengine.h>
|
|
#include <linux/pci.h>
|
|
#include "dma.h"
|
|
#include "registers.h"
|
|
#include "hw.h"
|
|
|
|
#include "../dmaengine.h"
|
|
|
|
static ssize_t cap_show(struct dma_chan *c, char *page)
|
|
{
|
|
struct dma_device *dma = c->device;
|
|
|
|
return sprintf(page, "copy%s%s%s%s%s\n",
|
|
dma_has_cap(DMA_PQ, dma->cap_mask) ? " pq" : "",
|
|
dma_has_cap(DMA_PQ_VAL, dma->cap_mask) ? " pq_val" : "",
|
|
dma_has_cap(DMA_XOR, dma->cap_mask) ? " xor" : "",
|
|
dma_has_cap(DMA_XOR_VAL, dma->cap_mask) ? " xor_val" : "",
|
|
dma_has_cap(DMA_INTERRUPT, dma->cap_mask) ? " intr" : "");
|
|
|
|
}
|
|
struct ioat_sysfs_entry ioat_cap_attr = __ATTR_RO(cap);
|
|
|
|
static ssize_t version_show(struct dma_chan *c, char *page)
|
|
{
|
|
struct dma_device *dma = c->device;
|
|
struct ioatdma_device *ioat_dma = to_ioatdma_device(dma);
|
|
|
|
return sprintf(page, "%d.%d\n",
|
|
ioat_dma->version >> 4, ioat_dma->version & 0xf);
|
|
}
|
|
struct ioat_sysfs_entry ioat_version_attr = __ATTR_RO(version);
|
|
|
|
static ssize_t
|
|
ioat_attr_show(struct kobject *kobj, struct attribute *attr, char *page)
|
|
{
|
|
struct ioat_sysfs_entry *entry;
|
|
struct ioatdma_chan *ioat_chan;
|
|
|
|
entry = container_of(attr, struct ioat_sysfs_entry, attr);
|
|
ioat_chan = container_of(kobj, struct ioatdma_chan, kobj);
|
|
|
|
if (!entry->show)
|
|
return -EIO;
|
|
return entry->show(&ioat_chan->dma_chan, page);
|
|
}
|
|
|
|
static ssize_t
|
|
ioat_attr_store(struct kobject *kobj, struct attribute *attr,
|
|
const char *page, size_t count)
|
|
{
|
|
struct ioat_sysfs_entry *entry;
|
|
struct ioatdma_chan *ioat_chan;
|
|
|
|
entry = container_of(attr, struct ioat_sysfs_entry, attr);
|
|
ioat_chan = container_of(kobj, struct ioatdma_chan, kobj);
|
|
|
|
if (!entry->store)
|
|
return -EIO;
|
|
return entry->store(&ioat_chan->dma_chan, page, count);
|
|
}
|
|
|
|
const struct sysfs_ops ioat_sysfs_ops = {
|
|
.show = ioat_attr_show,
|
|
.store = ioat_attr_store,
|
|
};
|
|
|
|
void ioat_kobject_add(struct ioatdma_device *ioat_dma, struct kobj_type *type)
|
|
{
|
|
struct dma_device *dma = &ioat_dma->dma_dev;
|
|
struct dma_chan *c;
|
|
|
|
list_for_each_entry(c, &dma->channels, device_node) {
|
|
struct ioatdma_chan *ioat_chan = to_ioat_chan(c);
|
|
struct kobject *parent = &c->dev->device.kobj;
|
|
int err;
|
|
|
|
err = kobject_init_and_add(&ioat_chan->kobj, type,
|
|
parent, "quickdata");
|
|
if (err) {
|
|
dev_warn(to_dev(ioat_chan),
|
|
"sysfs init error (%d), continuing...\n", err);
|
|
kobject_put(&ioat_chan->kobj);
|
|
set_bit(IOAT_KOBJ_INIT_FAIL, &ioat_chan->state);
|
|
}
|
|
}
|
|
}
|
|
|
|
void ioat_kobject_del(struct ioatdma_device *ioat_dma)
|
|
{
|
|
struct dma_device *dma = &ioat_dma->dma_dev;
|
|
struct dma_chan *c;
|
|
|
|
list_for_each_entry(c, &dma->channels, device_node) {
|
|
struct ioatdma_chan *ioat_chan = to_ioat_chan(c);
|
|
|
|
if (!test_bit(IOAT_KOBJ_INIT_FAIL, &ioat_chan->state)) {
|
|
kobject_del(&ioat_chan->kobj);
|
|
kobject_put(&ioat_chan->kobj);
|
|
}
|
|
}
|
|
}
|
|
|
|
static ssize_t ring_size_show(struct dma_chan *c, char *page)
|
|
{
|
|
struct ioatdma_chan *ioat_chan = to_ioat_chan(c);
|
|
|
|
return sprintf(page, "%d\n", (1 << ioat_chan->alloc_order) & ~1);
|
|
}
|
|
static struct ioat_sysfs_entry ring_size_attr = __ATTR_RO(ring_size);
|
|
|
|
static ssize_t ring_active_show(struct dma_chan *c, char *page)
|
|
{
|
|
struct ioatdma_chan *ioat_chan = to_ioat_chan(c);
|
|
|
|
/* ...taken outside the lock, no need to be precise */
|
|
return sprintf(page, "%d\n", ioat_ring_active(ioat_chan));
|
|
}
|
|
static struct ioat_sysfs_entry ring_active_attr = __ATTR_RO(ring_active);
|
|
|
|
static ssize_t intr_coalesce_show(struct dma_chan *c, char *page)
|
|
{
|
|
struct ioatdma_chan *ioat_chan = to_ioat_chan(c);
|
|
|
|
return sprintf(page, "%d\n", ioat_chan->intr_coalesce);
|
|
}
|
|
|
|
static ssize_t intr_coalesce_store(struct dma_chan *c, const char *page,
|
|
size_t count)
|
|
{
|
|
int intr_coalesce = 0;
|
|
struct ioatdma_chan *ioat_chan = to_ioat_chan(c);
|
|
|
|
if (sscanf(page, "%du", &intr_coalesce) != -1) {
|
|
if ((intr_coalesce < 0) ||
|
|
(intr_coalesce > IOAT_INTRDELAY_MASK))
|
|
return -EINVAL;
|
|
ioat_chan->intr_coalesce = intr_coalesce;
|
|
}
|
|
|
|
return count;
|
|
}
|
|
|
|
static struct ioat_sysfs_entry intr_coalesce_attr = __ATTR_RW(intr_coalesce);
|
|
|
|
static struct attribute *ioat_attrs[] = {
|
|
&ring_size_attr.attr,
|
|
&ring_active_attr.attr,
|
|
&ioat_cap_attr.attr,
|
|
&ioat_version_attr.attr,
|
|
&intr_coalesce_attr.attr,
|
|
NULL,
|
|
};
|
|
|
|
struct kobj_type ioat_ktype = {
|
|
.sysfs_ops = &ioat_sysfs_ops,
|
|
.default_attrs = ioat_attrs,
|
|
};
|