Loading...
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Intel I/OAT DMA Linux driver
4 * Copyright(c) 2004 - 2015 Intel Corporation.
5 */
6
7#include <linux/init.h>
8#include <linux/module.h>
9#include <linux/dmaengine.h>
10#include <linux/pci.h>
11#include "dma.h"
12#include "registers.h"
13#include "hw.h"
14
15#include "../dmaengine.h"
16
17static ssize_t cap_show(struct dma_chan *c, char *page)
18{
19 struct dma_device *dma = c->device;
20
21 return sprintf(page, "copy%s%s%s%s%s\n",
22 dma_has_cap(DMA_PQ, dma->cap_mask) ? " pq" : "",
23 dma_has_cap(DMA_PQ_VAL, dma->cap_mask) ? " pq_val" : "",
24 dma_has_cap(DMA_XOR, dma->cap_mask) ? " xor" : "",
25 dma_has_cap(DMA_XOR_VAL, dma->cap_mask) ? " xor_val" : "",
26 dma_has_cap(DMA_INTERRUPT, dma->cap_mask) ? " intr" : "");
27
28}
29struct ioat_sysfs_entry ioat_cap_attr = __ATTR_RO(cap);
30
31static ssize_t version_show(struct dma_chan *c, char *page)
32{
33 struct dma_device *dma = c->device;
34 struct ioatdma_device *ioat_dma = to_ioatdma_device(dma);
35
36 return sprintf(page, "%d.%d\n",
37 ioat_dma->version >> 4, ioat_dma->version & 0xf);
38}
39struct ioat_sysfs_entry ioat_version_attr = __ATTR_RO(version);
40
41static ssize_t
42ioat_attr_show(struct kobject *kobj, struct attribute *attr, char *page)
43{
44 struct ioat_sysfs_entry *entry;
45 struct ioatdma_chan *ioat_chan;
46
47 entry = container_of(attr, struct ioat_sysfs_entry, attr);
48 ioat_chan = container_of(kobj, struct ioatdma_chan, kobj);
49
50 if (!entry->show)
51 return -EIO;
52 return entry->show(&ioat_chan->dma_chan, page);
53}
54
55static ssize_t
56ioat_attr_store(struct kobject *kobj, struct attribute *attr,
57const char *page, size_t count)
58{
59 struct ioat_sysfs_entry *entry;
60 struct ioatdma_chan *ioat_chan;
61
62 entry = container_of(attr, struct ioat_sysfs_entry, attr);
63 ioat_chan = container_of(kobj, struct ioatdma_chan, kobj);
64
65 if (!entry->store)
66 return -EIO;
67 return entry->store(&ioat_chan->dma_chan, page, count);
68}
69
70const struct sysfs_ops ioat_sysfs_ops = {
71 .show = ioat_attr_show,
72 .store = ioat_attr_store,
73};
74
75void ioat_kobject_add(struct ioatdma_device *ioat_dma, struct kobj_type *type)
76{
77 struct dma_device *dma = &ioat_dma->dma_dev;
78 struct dma_chan *c;
79
80 list_for_each_entry(c, &dma->channels, device_node) {
81 struct ioatdma_chan *ioat_chan = to_ioat_chan(c);
82 struct kobject *parent = &c->dev->device.kobj;
83 int err;
84
85 err = kobject_init_and_add(&ioat_chan->kobj, type,
86 parent, "quickdata");
87 if (err) {
88 dev_warn(to_dev(ioat_chan),
89 "sysfs init error (%d), continuing...\n", err);
90 kobject_put(&ioat_chan->kobj);
91 set_bit(IOAT_KOBJ_INIT_FAIL, &ioat_chan->state);
92 }
93 }
94}
95
96void ioat_kobject_del(struct ioatdma_device *ioat_dma)
97{
98 struct dma_device *dma = &ioat_dma->dma_dev;
99 struct dma_chan *c;
100
101 list_for_each_entry(c, &dma->channels, device_node) {
102 struct ioatdma_chan *ioat_chan = to_ioat_chan(c);
103
104 if (!test_bit(IOAT_KOBJ_INIT_FAIL, &ioat_chan->state)) {
105 kobject_del(&ioat_chan->kobj);
106 kobject_put(&ioat_chan->kobj);
107 }
108 }
109}
110
111static ssize_t ring_size_show(struct dma_chan *c, char *page)
112{
113 struct ioatdma_chan *ioat_chan = to_ioat_chan(c);
114
115 return sprintf(page, "%d\n", (1 << ioat_chan->alloc_order) & ~1);
116}
117static struct ioat_sysfs_entry ring_size_attr = __ATTR_RO(ring_size);
118
119static ssize_t ring_active_show(struct dma_chan *c, char *page)
120{
121 struct ioatdma_chan *ioat_chan = to_ioat_chan(c);
122
123 /* ...taken outside the lock, no need to be precise */
124 return sprintf(page, "%d\n", ioat_ring_active(ioat_chan));
125}
126static struct ioat_sysfs_entry ring_active_attr = __ATTR_RO(ring_active);
127
128static ssize_t intr_coalesce_show(struct dma_chan *c, char *page)
129{
130 struct ioatdma_chan *ioat_chan = to_ioat_chan(c);
131
132 return sprintf(page, "%d\n", ioat_chan->intr_coalesce);
133}
134
135static ssize_t intr_coalesce_store(struct dma_chan *c, const char *page,
136size_t count)
137{
138 int intr_coalesce = 0;
139 struct ioatdma_chan *ioat_chan = to_ioat_chan(c);
140
141 if (sscanf(page, "%du", &intr_coalesce) != -1) {
142 if ((intr_coalesce < 0) ||
143 (intr_coalesce > IOAT_INTRDELAY_MASK))
144 return -EINVAL;
145 ioat_chan->intr_coalesce = intr_coalesce;
146 }
147
148 return count;
149}
150
151static struct ioat_sysfs_entry intr_coalesce_attr = __ATTR_RW(intr_coalesce);
152
153static struct attribute *ioat_attrs[] = {
154 &ring_size_attr.attr,
155 &ring_active_attr.attr,
156 &ioat_cap_attr.attr,
157 &ioat_version_attr.attr,
158 &intr_coalesce_attr.attr,
159 NULL,
160};
161ATTRIBUTE_GROUPS(ioat);
162
163struct kobj_type ioat_ktype = {
164 .sysfs_ops = &ioat_sysfs_ops,
165 .default_groups = ioat_groups,
166};
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Intel I/OAT DMA Linux driver
4 * Copyright(c) 2004 - 2015 Intel Corporation.
5 */
6
7#include <linux/init.h>
8#include <linux/module.h>
9#include <linux/dmaengine.h>
10#include <linux/pci.h>
11#include "dma.h"
12#include "registers.h"
13#include "hw.h"
14
15#include "../dmaengine.h"
16
17static ssize_t cap_show(struct dma_chan *c, char *page)
18{
19 struct dma_device *dma = c->device;
20
21 return sprintf(page, "copy%s%s%s%s%s\n",
22 dma_has_cap(DMA_PQ, dma->cap_mask) ? " pq" : "",
23 dma_has_cap(DMA_PQ_VAL, dma->cap_mask) ? " pq_val" : "",
24 dma_has_cap(DMA_XOR, dma->cap_mask) ? " xor" : "",
25 dma_has_cap(DMA_XOR_VAL, dma->cap_mask) ? " xor_val" : "",
26 dma_has_cap(DMA_INTERRUPT, dma->cap_mask) ? " intr" : "");
27
28}
29struct ioat_sysfs_entry ioat_cap_attr = __ATTR_RO(cap);
30
31static ssize_t version_show(struct dma_chan *c, char *page)
32{
33 struct dma_device *dma = c->device;
34 struct ioatdma_device *ioat_dma = to_ioatdma_device(dma);
35
36 return sprintf(page, "%d.%d\n",
37 ioat_dma->version >> 4, ioat_dma->version & 0xf);
38}
39struct ioat_sysfs_entry ioat_version_attr = __ATTR_RO(version);
40
41static ssize_t
42ioat_attr_show(struct kobject *kobj, struct attribute *attr, char *page)
43{
44 struct ioat_sysfs_entry *entry;
45 struct ioatdma_chan *ioat_chan;
46
47 entry = container_of(attr, struct ioat_sysfs_entry, attr);
48 ioat_chan = container_of(kobj, struct ioatdma_chan, kobj);
49
50 if (!entry->show)
51 return -EIO;
52 return entry->show(&ioat_chan->dma_chan, page);
53}
54
55static ssize_t
56ioat_attr_store(struct kobject *kobj, struct attribute *attr,
57const char *page, size_t count)
58{
59 struct ioat_sysfs_entry *entry;
60 struct ioatdma_chan *ioat_chan;
61
62 entry = container_of(attr, struct ioat_sysfs_entry, attr);
63 ioat_chan = container_of(kobj, struct ioatdma_chan, kobj);
64
65 if (!entry->store)
66 return -EIO;
67 return entry->store(&ioat_chan->dma_chan, page, count);
68}
69
70const struct sysfs_ops ioat_sysfs_ops = {
71 .show = ioat_attr_show,
72 .store = ioat_attr_store,
73};
74
75void ioat_kobject_add(struct ioatdma_device *ioat_dma, struct kobj_type *type)
76{
77 struct dma_device *dma = &ioat_dma->dma_dev;
78 struct dma_chan *c;
79
80 list_for_each_entry(c, &dma->channels, device_node) {
81 struct ioatdma_chan *ioat_chan = to_ioat_chan(c);
82 struct kobject *parent = &c->dev->device.kobj;
83 int err;
84
85 err = kobject_init_and_add(&ioat_chan->kobj, type,
86 parent, "quickdata");
87 if (err) {
88 dev_warn(to_dev(ioat_chan),
89 "sysfs init error (%d), continuing...\n", err);
90 kobject_put(&ioat_chan->kobj);
91 set_bit(IOAT_KOBJ_INIT_FAIL, &ioat_chan->state);
92 }
93 }
94}
95
96void ioat_kobject_del(struct ioatdma_device *ioat_dma)
97{
98 struct dma_device *dma = &ioat_dma->dma_dev;
99 struct dma_chan *c;
100
101 list_for_each_entry(c, &dma->channels, device_node) {
102 struct ioatdma_chan *ioat_chan = to_ioat_chan(c);
103
104 if (!test_bit(IOAT_KOBJ_INIT_FAIL, &ioat_chan->state)) {
105 kobject_del(&ioat_chan->kobj);
106 kobject_put(&ioat_chan->kobj);
107 }
108 }
109}
110
111static ssize_t ring_size_show(struct dma_chan *c, char *page)
112{
113 struct ioatdma_chan *ioat_chan = to_ioat_chan(c);
114
115 return sprintf(page, "%d\n", (1 << ioat_chan->alloc_order) & ~1);
116}
117static struct ioat_sysfs_entry ring_size_attr = __ATTR_RO(ring_size);
118
119static ssize_t ring_active_show(struct dma_chan *c, char *page)
120{
121 struct ioatdma_chan *ioat_chan = to_ioat_chan(c);
122
123 /* ...taken outside the lock, no need to be precise */
124 return sprintf(page, "%d\n", ioat_ring_active(ioat_chan));
125}
126static struct ioat_sysfs_entry ring_active_attr = __ATTR_RO(ring_active);
127
128static ssize_t intr_coalesce_show(struct dma_chan *c, char *page)
129{
130 struct ioatdma_chan *ioat_chan = to_ioat_chan(c);
131
132 return sprintf(page, "%d\n", ioat_chan->intr_coalesce);
133}
134
135static ssize_t intr_coalesce_store(struct dma_chan *c, const char *page,
136size_t count)
137{
138 int intr_coalesce = 0;
139 struct ioatdma_chan *ioat_chan = to_ioat_chan(c);
140
141 if (sscanf(page, "%du", &intr_coalesce) != -1) {
142 if ((intr_coalesce < 0) ||
143 (intr_coalesce > IOAT_INTRDELAY_MASK))
144 return -EINVAL;
145 ioat_chan->intr_coalesce = intr_coalesce;
146 }
147
148 return count;
149}
150
151static struct ioat_sysfs_entry intr_coalesce_attr = __ATTR_RW(intr_coalesce);
152
153static struct attribute *ioat_attrs[] = {
154 &ring_size_attr.attr,
155 &ring_active_attr.attr,
156 &ioat_cap_attr.attr,
157 &ioat_version_attr.attr,
158 &intr_coalesce_attr.attr,
159 NULL,
160};
161
162struct kobj_type ioat_ktype = {
163 .sysfs_ops = &ioat_sysfs_ops,
164 .default_attrs = ioat_attrs,
165};