1 What: /sys/bus/dsa/devices/dsa<m>/ve 1 What: /sys/bus/dsa/devices/dsa<m>/version
2 Date: Apr 15, 2020 2 Date: Apr 15, 2020
3 KernelVersion: 5.8.0 3 KernelVersion: 5.8.0
4 Contact: dmaengine@vger.kernel.org 4 Contact: dmaengine@vger.kernel.org
5 Description: The hardware version number. 5 Description: The hardware version number.
6 6
7 What: /sys/bus/dsa/devices/dsa<m>/cd 7 What: /sys/bus/dsa/devices/dsa<m>/cdev_major
8 Date: Oct 25, 2019 8 Date: Oct 25, 2019
9 KernelVersion: 5.6.0 9 KernelVersion: 5.6.0
10 Contact: dmaengine@vger.kernel.org 10 Contact: dmaengine@vger.kernel.org
11 Description: The major number that the char 11 Description: The major number that the character device driver assigned to
12 this device. 12 this device.
13 13
14 What: /sys/bus/dsa/devices/dsa<m>/er 14 What: /sys/bus/dsa/devices/dsa<m>/errors
15 Date: Oct 25, 2019 15 Date: Oct 25, 2019
16 KernelVersion: 5.6.0 16 KernelVersion: 5.6.0
17 Contact: dmaengine@vger.kernel.org 17 Contact: dmaengine@vger.kernel.org
18 Description: The error information for this 18 Description: The error information for this device.
19 19
20 What: /sys/bus/dsa/devices/dsa<m>/ma 20 What: /sys/bus/dsa/devices/dsa<m>/max_batch_size
21 Date: Oct 25, 2019 21 Date: Oct 25, 2019
22 KernelVersion: 5.6.0 22 KernelVersion: 5.6.0
23 Contact: dmaengine@vger.kernel.org 23 Contact: dmaengine@vger.kernel.org
24 Description: The largest number of work des 24 Description: The largest number of work descriptors in a batch.
25 It's not visible when the devi 25 It's not visible when the device does not support batch.
26 26
27 What: /sys/bus/dsa/devices/dsa<m>/ma 27 What: /sys/bus/dsa/devices/dsa<m>/max_work_queues_size
28 Date: Oct 25, 2019 28 Date: Oct 25, 2019
29 KernelVersion: 5.6.0 29 KernelVersion: 5.6.0
30 Contact: dmaengine@vger.kernel.org 30 Contact: dmaengine@vger.kernel.org
31 Description: The maximum work queue size su 31 Description: The maximum work queue size supported by this device.
32 32
33 What: /sys/bus/dsa/devices/dsa<m>/ma 33 What: /sys/bus/dsa/devices/dsa<m>/max_engines
34 Date: Oct 25, 2019 34 Date: Oct 25, 2019
35 KernelVersion: 5.6.0 35 KernelVersion: 5.6.0
36 Contact: dmaengine@vger.kernel.org 36 Contact: dmaengine@vger.kernel.org
37 Description: The maximum number of engines 37 Description: The maximum number of engines supported by this device.
38 38
39 What: /sys/bus/dsa/devices/dsa<m>/ma 39 What: /sys/bus/dsa/devices/dsa<m>/max_groups
40 Date: Oct 25, 2019 40 Date: Oct 25, 2019
41 KernelVersion: 5.6.0 41 KernelVersion: 5.6.0
42 Contact: dmaengine@vger.kernel.org 42 Contact: dmaengine@vger.kernel.org
43 Description: The maximum number of groups c 43 Description: The maximum number of groups can be created under this device.
44 44
45 What: /sys/bus/dsa/devices/dsa<m>/ma 45 What: /sys/bus/dsa/devices/dsa<m>/max_read_buffers
46 Date: Dec 10, 2021 46 Date: Dec 10, 2021
47 KernelVersion: 5.17.0 47 KernelVersion: 5.17.0
48 Contact: dmaengine@vger.kernel.org 48 Contact: dmaengine@vger.kernel.org
49 Description: The total number of read buffe 49 Description: The total number of read buffers supported by this device.
50 The read buffers represent res 50 The read buffers represent resources within the DSA
51 implementation, and these reso 51 implementation, and these resources are allocated by engines to
52 support operations. See DSA sp 52 support operations. See DSA spec v1.2 9.2.4 Total Read Buffers.
53 It's not visible when the devi 53 It's not visible when the device does not support Read Buffer
54 allocation control. 54 allocation control.
55 55
56 What: /sys/bus/dsa/devices/dsa<m>/ma 56 What: /sys/bus/dsa/devices/dsa<m>/max_transfer_size
57 Date: Oct 25, 2019 57 Date: Oct 25, 2019
58 KernelVersion: 5.6.0 58 KernelVersion: 5.6.0
59 Contact: dmaengine@vger.kernel.org 59 Contact: dmaengine@vger.kernel.org
60 Description: The number of bytes to be read 60 Description: The number of bytes to be read from the source address to
61 perform the operation. The max 61 perform the operation. The maximum transfer size is dependent on
62 the workqueue the descriptor w 62 the workqueue the descriptor was submitted to.
63 63
64 What: /sys/bus/dsa/devices/dsa<m>/ma 64 What: /sys/bus/dsa/devices/dsa<m>/max_work_queues
65 Date: Oct 25, 2019 65 Date: Oct 25, 2019
66 KernelVersion: 5.6.0 66 KernelVersion: 5.6.0
67 Contact: dmaengine@vger.kernel.org 67 Contact: dmaengine@vger.kernel.org
68 Description: The maximum work queue number 68 Description: The maximum work queue number that this device supports.
69 69
70 What: /sys/bus/dsa/devices/dsa<m>/nu 70 What: /sys/bus/dsa/devices/dsa<m>/numa_node
71 Date: Oct 25, 2019 71 Date: Oct 25, 2019
72 KernelVersion: 5.6.0 72 KernelVersion: 5.6.0
73 Contact: dmaengine@vger.kernel.org 73 Contact: dmaengine@vger.kernel.org
74 Description: The numa node number for this 74 Description: The numa node number for this device.
75 75
76 What: /sys/bus/dsa/devices/dsa<m>/op 76 What: /sys/bus/dsa/devices/dsa<m>/op_cap
77 Date: Oct 25, 2019 77 Date: Oct 25, 2019
78 KernelVersion: 5.6.0 78 KernelVersion: 5.6.0
79 Contact: dmaengine@vger.kernel.org 79 Contact: dmaengine@vger.kernel.org
80 Description: The operation capability bit m 80 Description: The operation capability bit mask specify the operation types
81 supported by the this device. 81 supported by the this device.
82 82
83 What: /sys/bus/dsa/devices/dsa<m>/pa 83 What: /sys/bus/dsa/devices/dsa<m>/pasid_enabled
84 Date: Oct 27, 2020 84 Date: Oct 27, 2020
85 KernelVersion: 5.11.0 85 KernelVersion: 5.11.0
86 Contact: dmaengine@vger.kernel.org 86 Contact: dmaengine@vger.kernel.org
87 Description: To indicate if user PASID (pro 87 Description: To indicate if user PASID (process address space identifier) is
88 enabled or not for this device 88 enabled or not for this device.
89 89
90 What: /sys/bus/dsa/devices/dsa<m>/st 90 What: /sys/bus/dsa/devices/dsa<m>/state
91 Date: Oct 25, 2019 91 Date: Oct 25, 2019
92 KernelVersion: 5.6.0 92 KernelVersion: 5.6.0
93 Contact: dmaengine@vger.kernel.org 93 Contact: dmaengine@vger.kernel.org
94 Description: The state information of this 94 Description: The state information of this device. It can be either enabled
95 or disabled. 95 or disabled.
96 96
97 What: /sys/bus/dsa/devices/dsa<m>/gr 97 What: /sys/bus/dsa/devices/dsa<m>/group<m>.<n>
98 Date: Oct 25, 2019 98 Date: Oct 25, 2019
99 KernelVersion: 5.6.0 99 KernelVersion: 5.6.0
100 Contact: dmaengine@vger.kernel.org 100 Contact: dmaengine@vger.kernel.org
101 Description: The assigned group under this 101 Description: The assigned group under this device.
102 102
103 What: /sys/bus/dsa/devices/dsa<m>/en 103 What: /sys/bus/dsa/devices/dsa<m>/engine<m>.<n>
104 Date: Oct 25, 2019 104 Date: Oct 25, 2019
105 KernelVersion: 5.6.0 105 KernelVersion: 5.6.0
106 Contact: dmaengine@vger.kernel.org 106 Contact: dmaengine@vger.kernel.org
107 Description: The assigned engine under this 107 Description: The assigned engine under this device.
108 108
109 What: /sys/bus/dsa/devices/dsa<m>/wq 109 What: /sys/bus/dsa/devices/dsa<m>/wq<m>.<n>
110 Date: Oct 25, 2019 110 Date: Oct 25, 2019
111 KernelVersion: 5.6.0 111 KernelVersion: 5.6.0
112 Contact: dmaengine@vger.kernel.org 112 Contact: dmaengine@vger.kernel.org
113 Description: The assigned work queue under 113 Description: The assigned work queue under this device.
114 114
115 What: /sys/bus/dsa/devices/dsa<m>/co 115 What: /sys/bus/dsa/devices/dsa<m>/configurable
116 Date: Oct 25, 2019 116 Date: Oct 25, 2019
117 KernelVersion: 5.6.0 117 KernelVersion: 5.6.0
118 Contact: dmaengine@vger.kernel.org 118 Contact: dmaengine@vger.kernel.org
119 Description: To indicate if this device is 119 Description: To indicate if this device is configurable or not.
120 120
121 What: /sys/bus/dsa/devices/dsa<m>/re 121 What: /sys/bus/dsa/devices/dsa<m>/read_buffer_limit
122 Date: Dec 10, 2021 122 Date: Dec 10, 2021
123 KernelVersion: 5.17.0 123 KernelVersion: 5.17.0
124 Contact: dmaengine@vger.kernel.org 124 Contact: dmaengine@vger.kernel.org
125 Description: The maximum number of read buf 125 Description: The maximum number of read buffers that may be in use at
126 one time by operations that ac 126 one time by operations that access low bandwidth memory in the
127 device. See DSA spec v1.2 9.2. 127 device. See DSA spec v1.2 9.2.8 GENCFG on Global Read Buffer Limit.
128 It's not visible when the devi 128 It's not visible when the device does not support Read Buffer
129 allocation control. 129 allocation control.
130 130
131 What: /sys/bus/dsa/devices/dsa<m>/cm 131 What: /sys/bus/dsa/devices/dsa<m>/cmd_status
132 Date: Aug 28, 2020 132 Date: Aug 28, 2020
133 KernelVersion: 5.10.0 133 KernelVersion: 5.10.0
134 Contact: dmaengine@vger.kernel.org 134 Contact: dmaengine@vger.kernel.org
135 Description: The last executed device admin 135 Description: The last executed device administrative command's status/error.
136 Also last configuration error 136 Also last configuration error overloaded.
137 Writing to it will clear the s 137 Writing to it will clear the status.
138 138
139 What: /sys/bus/dsa/devices/dsa<m>/ia 139 What: /sys/bus/dsa/devices/dsa<m>/iaa_cap
140 Date: Sept 14, 2022 140 Date: Sept 14, 2022
141 KernelVersion: 6.0.0 141 KernelVersion: 6.0.0
142 Contact: dmaengine@vger.kernel.org 142 Contact: dmaengine@vger.kernel.org
143 Description: IAA (IAX) capability mask. Exp 143 Description: IAA (IAX) capability mask. Exported to user space for application
144 consumption. This attribute sh 144 consumption. This attribute should only be visible on IAA devices
145 that are version 2 or later. 145 that are version 2 or later.
146 146
147 What: /sys/bus/dsa/devices/dsa<m>/ev 147 What: /sys/bus/dsa/devices/dsa<m>/event_log_size
148 Date: Sept 14, 2022 148 Date: Sept 14, 2022
149 KernelVersion: 6.4.0 149 KernelVersion: 6.4.0
150 Contact: dmaengine@vger.kernel.org 150 Contact: dmaengine@vger.kernel.org
151 Description: The event log size to be confi 151 Description: The event log size to be configured. Default is 64 entries and
152 occupies 4k size if the evl en 152 occupies 4k size if the evl entry is 64 bytes. It's visible
153 only on platforms that support 153 only on platforms that support the capability.
154 154
155 What: /sys/bus/dsa/devices/wq<m>.<n> 155 What: /sys/bus/dsa/devices/wq<m>.<n>/block_on_fault
156 Date: Oct 27, 2020 156 Date: Oct 27, 2020
157 KernelVersion: 5.11.0 157 KernelVersion: 5.11.0
158 Contact: dmaengine@vger.kernel.org 158 Contact: dmaengine@vger.kernel.org
159 Description: To indicate block on fault is 159 Description: To indicate block on fault is allowed or not for the work queue
160 to support on demand paging. 160 to support on demand paging.
161 161
162 What: /sys/bus/dsa/devices/wq<m>.<n> 162 What: /sys/bus/dsa/devices/wq<m>.<n>/group_id
163 Date: Oct 25, 2019 163 Date: Oct 25, 2019
164 KernelVersion: 5.6.0 164 KernelVersion: 5.6.0
165 Contact: dmaengine@vger.kernel.org 165 Contact: dmaengine@vger.kernel.org
166 Description: The group id that this work qu 166 Description: The group id that this work queue belongs to.
167 167
168 What: /sys/bus/dsa/devices/wq<m>.<n> 168 What: /sys/bus/dsa/devices/wq<m>.<n>/size
169 Date: Oct 25, 2019 169 Date: Oct 25, 2019
170 KernelVersion: 5.6.0 170 KernelVersion: 5.6.0
171 Contact: dmaengine@vger.kernel.org 171 Contact: dmaengine@vger.kernel.org
172 Description: The work queue size for this w 172 Description: The work queue size for this work queue.
173 173
174 What: /sys/bus/dsa/devices/wq<m>.<n> 174 What: /sys/bus/dsa/devices/wq<m>.<n>/type
175 Date: Oct 25, 2019 175 Date: Oct 25, 2019
176 KernelVersion: 5.6.0 176 KernelVersion: 5.6.0
177 Contact: dmaengine@vger.kernel.org 177 Contact: dmaengine@vger.kernel.org
178 Description: The type of this work queue, i 178 Description: The type of this work queue, it can be "kernel" type for work
179 queue usages in the kernel spa 179 queue usages in the kernel space or "user" type for work queue
180 usages by applications in user 180 usages by applications in user space.
181 181
182 What: /sys/bus/dsa/devices/wq<m>.<n> 182 What: /sys/bus/dsa/devices/wq<m>.<n>/cdev_minor
183 Date: Oct 25, 2019 183 Date: Oct 25, 2019
184 KernelVersion: 5.6.0 184 KernelVersion: 5.6.0
185 Contact: dmaengine@vger.kernel.org 185 Contact: dmaengine@vger.kernel.org
186 Description: The minor number assigned to t 186 Description: The minor number assigned to this work queue by the character
187 device driver. 187 device driver.
188 188
189 What: /sys/bus/dsa/devices/wq<m>.<n> 189 What: /sys/bus/dsa/devices/wq<m>.<n>/mode
190 Date: Oct 25, 2019 190 Date: Oct 25, 2019
191 KernelVersion: 5.6.0 191 KernelVersion: 5.6.0
192 Contact: dmaengine@vger.kernel.org 192 Contact: dmaengine@vger.kernel.org
193 Description: The work queue mode type for t 193 Description: The work queue mode type for this work queue.
194 194
195 What: /sys/bus/dsa/devices/wq<m>.<n> 195 What: /sys/bus/dsa/devices/wq<m>.<n>/priority
196 Date: Oct 25, 2019 196 Date: Oct 25, 2019
197 KernelVersion: 5.6.0 197 KernelVersion: 5.6.0
198 Contact: dmaengine@vger.kernel.org 198 Contact: dmaengine@vger.kernel.org
199 Description: The priority value of this wor 199 Description: The priority value of this work queue, it is a value relative to
200 other work queue in the same g 200 other work queue in the same group to control quality of service
201 for dispatching work from mult 201 for dispatching work from multiple workqueues in the same group.
202 202
203 What: /sys/bus/dsa/devices/wq<m>.<n> 203 What: /sys/bus/dsa/devices/wq<m>.<n>/state
204 Date: Oct 25, 2019 204 Date: Oct 25, 2019
205 KernelVersion: 5.6.0 205 KernelVersion: 5.6.0
206 Contact: dmaengine@vger.kernel.org 206 Contact: dmaengine@vger.kernel.org
207 Description: The current state of the work 207 Description: The current state of the work queue.
208 208
209 What: /sys/bus/dsa/devices/wq<m>.<n> 209 What: /sys/bus/dsa/devices/wq<m>.<n>/threshold
210 Date: Oct 25, 2019 210 Date: Oct 25, 2019
211 KernelVersion: 5.6.0 211 KernelVersion: 5.6.0
212 Contact: dmaengine@vger.kernel.org 212 Contact: dmaengine@vger.kernel.org
213 Description: The number of entries in this 213 Description: The number of entries in this work queue that may be filled
214 via a limited portal. 214 via a limited portal.
215 215
216 What: /sys/bus/dsa/devices/wq<m>.<n> 216 What: /sys/bus/dsa/devices/wq<m>.<n>/max_transfer_size
217 Date: Aug 28, 2020 217 Date: Aug 28, 2020
218 KernelVersion: 5.10.0 218 KernelVersion: 5.10.0
219 Contact: dmaengine@vger.kernel.org 219 Contact: dmaengine@vger.kernel.org
220 Description: The max transfer sized for thi 220 Description: The max transfer sized for this workqueue. Cannot exceed device
221 max transfer size. Configurabl 221 max transfer size. Configurable parameter.
222 222
223 What: /sys/bus/dsa/devices/wq<m>.<n> 223 What: /sys/bus/dsa/devices/wq<m>.<n>/max_batch_size
224 Date: Aug 28, 2020 224 Date: Aug 28, 2020
225 KernelVersion: 5.10.0 225 KernelVersion: 5.10.0
226 Contact: dmaengine@vger.kernel.org 226 Contact: dmaengine@vger.kernel.org
227 Description: The max batch size for this wo 227 Description: The max batch size for this workqueue. Cannot exceed device
228 max batch size. Configurable p 228 max batch size. Configurable parameter.
229 It's not visible when the devi 229 It's not visible when the device does not support batch.
230 230
231 What: /sys/bus/dsa/devices/wq<m>.<n> 231 What: /sys/bus/dsa/devices/wq<m>.<n>/ats_disable
232 Date: Nov 13, 2020 232 Date: Nov 13, 2020
233 KernelVersion: 5.11.0 233 KernelVersion: 5.11.0
234 Contact: dmaengine@vger.kernel.org 234 Contact: dmaengine@vger.kernel.org
235 Description: Indicate whether ATS disable i 235 Description: Indicate whether ATS disable is turned on for the workqueue.
236 0 indicates ATS is on, and 1 i 236 0 indicates ATS is on, and 1 indicates ATS is off for the workqueue.
237 237
238 What: /sys/bus/dsa/devices/wq<m>.<n> 238 What: /sys/bus/dsa/devices/wq<m>.<n>/prs_disable
239 Date: Sept 14, 2022 239 Date: Sept 14, 2022
240 KernelVersion: 6.4.0 240 KernelVersion: 6.4.0
241 Contact: dmaengine@vger.kernel.org 241 Contact: dmaengine@vger.kernel.org
242 Description: Controls whether PRS disable i 242 Description: Controls whether PRS disable is turned on for the workqueue.
243 0 indicates PRS is on, and 1 i 243 0 indicates PRS is on, and 1 indicates PRS is off for the
244 workqueue. This option overrid 244 workqueue. This option overrides block_on_fault attribute
245 if set. It's visible only on p 245 if set. It's visible only on platforms that support the
246 capability. 246 capability.
247 247
248 What: /sys/bus/dsa/devices/wq<m>.<n> 248 What: /sys/bus/dsa/devices/wq<m>.<n>/occupancy
249 Date May 25, 2021 249 Date May 25, 2021
250 KernelVersion: 5.14.0 250 KernelVersion: 5.14.0
251 Contact: dmaengine@vger.kernel.org 251 Contact: dmaengine@vger.kernel.org
252 Description: Show the current number of ent 252 Description: Show the current number of entries in this WQ if WQ Occupancy
253 Support bit WQ capabilities is 253 Support bit WQ capabilities is 1.
254 254
255 What: /sys/bus/dsa/devices/wq<m>.<n> 255 What: /sys/bus/dsa/devices/wq<m>.<n>/enqcmds_retries
256 Date Oct 29, 2021 256 Date Oct 29, 2021
257 KernelVersion: 5.17.0 257 KernelVersion: 5.17.0
258 Contact: dmaengine@vger.kernel.org 258 Contact: dmaengine@vger.kernel.org
259 Description: Indicate the number of retires 259 Description: Indicate the number of retires for an enqcmds submission on a sharedwq.
260 A max value to set attribute i 260 A max value to set attribute is capped at 64.
261 261
262 What: /sys/bus/dsa/devices/wq<m>.<n> 262 What: /sys/bus/dsa/devices/wq<m>.<n>/op_config
263 Date: Sept 14, 2022 263 Date: Sept 14, 2022
264 KernelVersion: 6.0.0 264 KernelVersion: 6.0.0
265 Contact: dmaengine@vger.kernel.org 265 Contact: dmaengine@vger.kernel.org
266 Description: Shows the operation capability 266 Description: Shows the operation capability bits displayed in bitmap format
267 presented by %*pb printk() out 267 presented by %*pb printk() output format specifier.
268 The attribute can be configure 268 The attribute can be configured when the WQ is disabled in
269 order to configure the WQ to a 269 order to configure the WQ to accept specific bits that
270 correlates to the operations a 270 correlates to the operations allowed. It's visible only
271 on platforms that support the 271 on platforms that support the capability.
272 272
273 What: /sys/bus/dsa/devices/wq<m>.<n> <<
274 Date: Sept 8, 2023 <<
275 KernelVersion: 6.7.0 <<
276 Contact: dmaengine@vger.kernel.org <<
277 Description: Name of driver to be bounded t <<
278 <<
279 What: /sys/bus/dsa/devices/engine<m> 273 What: /sys/bus/dsa/devices/engine<m>.<n>/group_id
280 Date: Oct 25, 2019 274 Date: Oct 25, 2019
281 KernelVersion: 5.6.0 275 KernelVersion: 5.6.0
282 Contact: dmaengine@vger.kernel.org 276 Contact: dmaengine@vger.kernel.org
283 Description: The group that this engine bel 277 Description: The group that this engine belongs to.
284 278
285 What: /sys/bus/dsa/devices/group<m>. 279 What: /sys/bus/dsa/devices/group<m>.<n>/use_read_buffer_limit
286 Date: Dec 10, 2021 280 Date: Dec 10, 2021
287 KernelVersion: 5.17.0 281 KernelVersion: 5.17.0
288 Contact: dmaengine@vger.kernel.org 282 Contact: dmaengine@vger.kernel.org
289 Description: Enable the use of global read 283 Description: Enable the use of global read buffer limit for the group. See DSA
290 spec v1.2 9.2.18 GRPCFG Use Gl 284 spec v1.2 9.2.18 GRPCFG Use Global Read Buffer Limit.
291 It's not visible when the devi 285 It's not visible when the device does not support Read Buffer
292 allocation control. 286 allocation control.
293 287
294 What: /sys/bus/dsa/devices/group<m>. 288 What: /sys/bus/dsa/devices/group<m>.<n>/read_buffers_allowed
295 Date: Dec 10, 2021 289 Date: Dec 10, 2021
296 KernelVersion: 5.17.0 290 KernelVersion: 5.17.0
297 Contact: dmaengine@vger.kernel.org 291 Contact: dmaengine@vger.kernel.org
298 Description: Indicates max number of read b 292 Description: Indicates max number of read buffers that may be in use at one time
299 by all engines in the group. S 293 by all engines in the group. See DSA spec v1.2 9.2.18 GRPCFG Read
300 Buffers Allowed. 294 Buffers Allowed.
301 It's not visible when the devi 295 It's not visible when the device does not support Read Buffer
302 allocation control. 296 allocation control.
303 297
304 What: /sys/bus/dsa/devices/group<m>. 298 What: /sys/bus/dsa/devices/group<m>.<n>/read_buffers_reserved
305 Date: Dec 10, 2021 299 Date: Dec 10, 2021
306 KernelVersion: 5.17.0 300 KernelVersion: 5.17.0
307 Contact: dmaengine@vger.kernel.org 301 Contact: dmaengine@vger.kernel.org
308 Description: Indicates the number of Read B 302 Description: Indicates the number of Read Buffers reserved for the use of
309 engines in the group. See DSA 303 engines in the group. See DSA spec v1.2 9.2.18 GRPCFG Read Buffers
310 Reserved. 304 Reserved.
311 It's not visible when the devi 305 It's not visible when the device does not support Read Buffer
312 allocation control. 306 allocation control.
313 307
314 What: /sys/bus/dsa/devices/group<m>. 308 What: /sys/bus/dsa/devices/group<m>.<n>/desc_progress_limit
315 Date: Sept 14, 2022 309 Date: Sept 14, 2022
316 KernelVersion: 6.0.0 310 KernelVersion: 6.0.0
317 Contact: dmaengine@vger.kernel.org 311 Contact: dmaengine@vger.kernel.org
318 Description: Allows control of the number o 312 Description: Allows control of the number of work descriptors that can be
319 concurrently processed by an e 313 concurrently processed by an engine in the group as a fraction
320 of the Maximum Work Descriptor 314 of the Maximum Work Descriptors in Progress value specified in
321 the ENGCAP register. The accep 315 the ENGCAP register. The acceptable values are 0 (default),
322 1 (1/2 of max value), 2 (1/4 o 316 1 (1/2 of max value), 2 (1/4 of the max value), and 3 (1/8 of
323 the max value). It's visible o 317 the max value). It's visible only on platforms that support
324 the capability. 318 the capability.
325 319
326 What: /sys/bus/dsa/devices/group<m>. 320 What: /sys/bus/dsa/devices/group<m>.<n>/batch_progress_limit
327 Date: Sept 14, 2022 321 Date: Sept 14, 2022
328 KernelVersion: 6.0.0 322 KernelVersion: 6.0.0
329 Contact: dmaengine@vger.kernel.org 323 Contact: dmaengine@vger.kernel.org
330 Description: Allows control of the number o 324 Description: Allows control of the number of batch descriptors that can be
331 concurrently processed by an e 325 concurrently processed by an engine in the group as a fraction
332 of the Maximum Batch Descripto 326 of the Maximum Batch Descriptors in Progress value specified in
333 the ENGCAP register. The accep 327 the ENGCAP register. The acceptable values are 0 (default),
334 1 (1/2 of max value), 2 (1/4 o 328 1 (1/2 of max value), 2 (1/4 of the max value), and 3 (1/8 of
335 the max value). It's visible o 329 the max value). It's visible only on platforms that support
336 the capability. 330 the capability.
337 331
338 What: /sys/bus/dsa/devices/wq<m>.<n> 332 What: /sys/bus/dsa/devices/wq<m>.<n>/dsa<x>\!wq<m>.<n>/file<y>/cr_faults
339 Date: Sept 14, 2022 333 Date: Sept 14, 2022
340 KernelVersion: 6.4.0 334 KernelVersion: 6.4.0
341 Contact: dmaengine@vger.kernel.org 335 Contact: dmaengine@vger.kernel.org
342 Description: Show the number of Completion 336 Description: Show the number of Completion Record (CR) faults this application
343 has caused. 337 has caused.
344 338
345 What: /sys/bus/dsa/devices/wq<m>.<n> 339 What: /sys/bus/dsa/devices/wq<m>.<n>/dsa<x>\!wq<m>.<n>/file<y>/cr_fault_failures
346 Date: Sept 14, 2022 340 Date: Sept 14, 2022
347 KernelVersion: 6.4.0 341 KernelVersion: 6.4.0
348 Contact: dmaengine@vger.kernel.org 342 Contact: dmaengine@vger.kernel.org
349 Description: Show the number of Completion 343 Description: Show the number of Completion Record (CR) faults failures that this
350 application has caused. The fa 344 application has caused. The failure counter is incremented when the
351 driver cannot fault in the add 345 driver cannot fault in the address for the CR. Typically this is caused
352 by a bad address programmed in 346 by a bad address programmed in the submitted descriptor or a malicious
353 submitter is using bad CR addr 347 submitter is using bad CR address on purpose.
354 348
355 What: /sys/bus/dsa/devices/wq<m>.<n> 349 What: /sys/bus/dsa/devices/wq<m>.<n>/dsa<x>\!wq<m>.<n>/file<y>/pid
356 Date: Sept 14, 2022 350 Date: Sept 14, 2022
357 KernelVersion: 6.4.0 351 KernelVersion: 6.4.0
358 Contact: dmaengine@vger.kernel.org 352 Contact: dmaengine@vger.kernel.org
359 Description: Show the process id of the app 353 Description: Show the process id of the application that opened the file. This is
360 helpful information for a moni 354 helpful information for a monitor daemon that wants to kill the
361 application that opened the fi 355 application that opened the file.
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