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 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 <<
140 Date: Sept 14, 2022 <<
141 KernelVersion: 6.0.0 <<
142 Contact: dmaengine@vger.kernel.org <<
143 Description: IAA (IAX) capability mask. Exp <<
144 consumption. This attribute sh <<
145 that are version 2 or later. <<
146 <<
147 What: /sys/bus/dsa/devices/dsa<m>/ev <<
148 Date: Sept 14, 2022 <<
149 KernelVersion: 6.4.0 <<
150 Contact: dmaengine@vger.kernel.org <<
151 Description: The event log size to be confi <<
152 occupies 4k size if the evl en <<
153 only on platforms that support <<
154 <<
155 What: /sys/bus/dsa/devices/wq<m>.<n> 139 What: /sys/bus/dsa/devices/wq<m>.<n>/block_on_fault
156 Date: Oct 27, 2020 140 Date: Oct 27, 2020
157 KernelVersion: 5.11.0 141 KernelVersion: 5.11.0
158 Contact: dmaengine@vger.kernel.org 142 Contact: dmaengine@vger.kernel.org
159 Description: To indicate block on fault is 143 Description: To indicate block on fault is allowed or not for the work queue
160 to support on demand paging. 144 to support on demand paging.
161 145
162 What: /sys/bus/dsa/devices/wq<m>.<n> 146 What: /sys/bus/dsa/devices/wq<m>.<n>/group_id
163 Date: Oct 25, 2019 147 Date: Oct 25, 2019
164 KernelVersion: 5.6.0 148 KernelVersion: 5.6.0
165 Contact: dmaengine@vger.kernel.org 149 Contact: dmaengine@vger.kernel.org
166 Description: The group id that this work qu 150 Description: The group id that this work queue belongs to.
167 151
168 What: /sys/bus/dsa/devices/wq<m>.<n> 152 What: /sys/bus/dsa/devices/wq<m>.<n>/size
169 Date: Oct 25, 2019 153 Date: Oct 25, 2019
170 KernelVersion: 5.6.0 154 KernelVersion: 5.6.0
171 Contact: dmaengine@vger.kernel.org 155 Contact: dmaengine@vger.kernel.org
172 Description: The work queue size for this w 156 Description: The work queue size for this work queue.
173 157
174 What: /sys/bus/dsa/devices/wq<m>.<n> 158 What: /sys/bus/dsa/devices/wq<m>.<n>/type
175 Date: Oct 25, 2019 159 Date: Oct 25, 2019
176 KernelVersion: 5.6.0 160 KernelVersion: 5.6.0
177 Contact: dmaengine@vger.kernel.org 161 Contact: dmaengine@vger.kernel.org
178 Description: The type of this work queue, i 162 Description: The type of this work queue, it can be "kernel" type for work
179 queue usages in the kernel spa 163 queue usages in the kernel space or "user" type for work queue
180 usages by applications in user 164 usages by applications in user space.
181 165
182 What: /sys/bus/dsa/devices/wq<m>.<n> 166 What: /sys/bus/dsa/devices/wq<m>.<n>/cdev_minor
183 Date: Oct 25, 2019 167 Date: Oct 25, 2019
184 KernelVersion: 5.6.0 168 KernelVersion: 5.6.0
185 Contact: dmaengine@vger.kernel.org 169 Contact: dmaengine@vger.kernel.org
186 Description: The minor number assigned to t 170 Description: The minor number assigned to this work queue by the character
187 device driver. 171 device driver.
188 172
189 What: /sys/bus/dsa/devices/wq<m>.<n> 173 What: /sys/bus/dsa/devices/wq<m>.<n>/mode
190 Date: Oct 25, 2019 174 Date: Oct 25, 2019
191 KernelVersion: 5.6.0 175 KernelVersion: 5.6.0
192 Contact: dmaengine@vger.kernel.org 176 Contact: dmaengine@vger.kernel.org
193 Description: The work queue mode type for t 177 Description: The work queue mode type for this work queue.
194 178
195 What: /sys/bus/dsa/devices/wq<m>.<n> 179 What: /sys/bus/dsa/devices/wq<m>.<n>/priority
196 Date: Oct 25, 2019 180 Date: Oct 25, 2019
197 KernelVersion: 5.6.0 181 KernelVersion: 5.6.0
198 Contact: dmaengine@vger.kernel.org 182 Contact: dmaengine@vger.kernel.org
199 Description: The priority value of this wor 183 Description: The priority value of this work queue, it is a value relative to
200 other work queue in the same g 184 other work queue in the same group to control quality of service
201 for dispatching work from mult 185 for dispatching work from multiple workqueues in the same group.
202 186
203 What: /sys/bus/dsa/devices/wq<m>.<n> 187 What: /sys/bus/dsa/devices/wq<m>.<n>/state
204 Date: Oct 25, 2019 188 Date: Oct 25, 2019
205 KernelVersion: 5.6.0 189 KernelVersion: 5.6.0
206 Contact: dmaengine@vger.kernel.org 190 Contact: dmaengine@vger.kernel.org
207 Description: The current state of the work 191 Description: The current state of the work queue.
208 192
209 What: /sys/bus/dsa/devices/wq<m>.<n> 193 What: /sys/bus/dsa/devices/wq<m>.<n>/threshold
210 Date: Oct 25, 2019 194 Date: Oct 25, 2019
211 KernelVersion: 5.6.0 195 KernelVersion: 5.6.0
212 Contact: dmaengine@vger.kernel.org 196 Contact: dmaengine@vger.kernel.org
213 Description: The number of entries in this 197 Description: The number of entries in this work queue that may be filled
214 via a limited portal. 198 via a limited portal.
215 199
216 What: /sys/bus/dsa/devices/wq<m>.<n> 200 What: /sys/bus/dsa/devices/wq<m>.<n>/max_transfer_size
217 Date: Aug 28, 2020 201 Date: Aug 28, 2020
218 KernelVersion: 5.10.0 202 KernelVersion: 5.10.0
219 Contact: dmaengine@vger.kernel.org 203 Contact: dmaengine@vger.kernel.org
220 Description: The max transfer sized for thi 204 Description: The max transfer sized for this workqueue. Cannot exceed device
221 max transfer size. Configurabl 205 max transfer size. Configurable parameter.
222 206
223 What: /sys/bus/dsa/devices/wq<m>.<n> 207 What: /sys/bus/dsa/devices/wq<m>.<n>/max_batch_size
224 Date: Aug 28, 2020 208 Date: Aug 28, 2020
225 KernelVersion: 5.10.0 209 KernelVersion: 5.10.0
226 Contact: dmaengine@vger.kernel.org 210 Contact: dmaengine@vger.kernel.org
227 Description: The max batch size for this wo 211 Description: The max batch size for this workqueue. Cannot exceed device
228 max batch size. Configurable p 212 max batch size. Configurable parameter.
229 It's not visible when the devi 213 It's not visible when the device does not support batch.
230 214
231 What: /sys/bus/dsa/devices/wq<m>.<n> 215 What: /sys/bus/dsa/devices/wq<m>.<n>/ats_disable
232 Date: Nov 13, 2020 216 Date: Nov 13, 2020
233 KernelVersion: 5.11.0 217 KernelVersion: 5.11.0
234 Contact: dmaengine@vger.kernel.org 218 Contact: dmaengine@vger.kernel.org
235 Description: Indicate whether ATS disable i 219 Description: Indicate whether ATS disable is turned on for the workqueue.
236 0 indicates ATS is on, and 1 i 220 0 indicates ATS is on, and 1 indicates ATS is off for the workqueue.
237 221
238 What: /sys/bus/dsa/devices/wq<m>.<n> <<
239 Date: Sept 14, 2022 <<
240 KernelVersion: 6.4.0 <<
241 Contact: dmaengine@vger.kernel.org <<
242 Description: Controls whether PRS disable i <<
243 0 indicates PRS is on, and 1 i <<
244 workqueue. This option overrid <<
245 if set. It's visible only on p <<
246 capability. <<
247 <<
248 What: /sys/bus/dsa/devices/wq<m>.<n> 222 What: /sys/bus/dsa/devices/wq<m>.<n>/occupancy
249 Date May 25, 2021 223 Date May 25, 2021
250 KernelVersion: 5.14.0 224 KernelVersion: 5.14.0
251 Contact: dmaengine@vger.kernel.org 225 Contact: dmaengine@vger.kernel.org
252 Description: Show the current number of ent 226 Description: Show the current number of entries in this WQ if WQ Occupancy
253 Support bit WQ capabilities is 227 Support bit WQ capabilities is 1.
254 228
255 What: /sys/bus/dsa/devices/wq<m>.<n> 229 What: /sys/bus/dsa/devices/wq<m>.<n>/enqcmds_retries
256 Date Oct 29, 2021 230 Date Oct 29, 2021
257 KernelVersion: 5.17.0 231 KernelVersion: 5.17.0
258 Contact: dmaengine@vger.kernel.org 232 Contact: dmaengine@vger.kernel.org
259 Description: Indicate the number of retires 233 Description: Indicate the number of retires for an enqcmds submission on a sharedwq.
260 A max value to set attribute i 234 A max value to set attribute is capped at 64.
261 235
262 What: /sys/bus/dsa/devices/wq<m>.<n> 236 What: /sys/bus/dsa/devices/wq<m>.<n>/op_config
263 Date: Sept 14, 2022 237 Date: Sept 14, 2022
264 KernelVersion: 6.0.0 238 KernelVersion: 6.0.0
265 Contact: dmaengine@vger.kernel.org 239 Contact: dmaengine@vger.kernel.org
266 Description: Shows the operation capability 240 Description: Shows the operation capability bits displayed in bitmap format
267 presented by %*pb printk() out 241 presented by %*pb printk() output format specifier.
268 The attribute can be configure 242 The attribute can be configured when the WQ is disabled in
269 order to configure the WQ to a 243 order to configure the WQ to accept specific bits that
270 correlates to the operations a 244 correlates to the operations allowed. It's visible only
271 on platforms that support the 245 on platforms that support the capability.
272 246
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> 247 What: /sys/bus/dsa/devices/engine<m>.<n>/group_id
280 Date: Oct 25, 2019 248 Date: Oct 25, 2019
281 KernelVersion: 5.6.0 249 KernelVersion: 5.6.0
282 Contact: dmaengine@vger.kernel.org 250 Contact: dmaengine@vger.kernel.org
283 Description: The group that this engine bel 251 Description: The group that this engine belongs to.
284 252
285 What: /sys/bus/dsa/devices/group<m>. 253 What: /sys/bus/dsa/devices/group<m>.<n>/use_read_buffer_limit
286 Date: Dec 10, 2021 254 Date: Dec 10, 2021
287 KernelVersion: 5.17.0 255 KernelVersion: 5.17.0
288 Contact: dmaengine@vger.kernel.org 256 Contact: dmaengine@vger.kernel.org
289 Description: Enable the use of global read 257 Description: Enable the use of global read buffer limit for the group. See DSA
290 spec v1.2 9.2.18 GRPCFG Use Gl 258 spec v1.2 9.2.18 GRPCFG Use Global Read Buffer Limit.
291 It's not visible when the devi 259 It's not visible when the device does not support Read Buffer
292 allocation control. 260 allocation control.
293 261
294 What: /sys/bus/dsa/devices/group<m>. 262 What: /sys/bus/dsa/devices/group<m>.<n>/read_buffers_allowed
295 Date: Dec 10, 2021 263 Date: Dec 10, 2021
296 KernelVersion: 5.17.0 264 KernelVersion: 5.17.0
297 Contact: dmaengine@vger.kernel.org 265 Contact: dmaengine@vger.kernel.org
298 Description: Indicates max number of read b 266 Description: Indicates max number of read buffers that may be in use at one time
299 by all engines in the group. S 267 by all engines in the group. See DSA spec v1.2 9.2.18 GRPCFG Read
300 Buffers Allowed. 268 Buffers Allowed.
301 It's not visible when the devi 269 It's not visible when the device does not support Read Buffer
302 allocation control. 270 allocation control.
303 271
304 What: /sys/bus/dsa/devices/group<m>. 272 What: /sys/bus/dsa/devices/group<m>.<n>/read_buffers_reserved
305 Date: Dec 10, 2021 273 Date: Dec 10, 2021
306 KernelVersion: 5.17.0 274 KernelVersion: 5.17.0
307 Contact: dmaengine@vger.kernel.org 275 Contact: dmaengine@vger.kernel.org
308 Description: Indicates the number of Read B 276 Description: Indicates the number of Read Buffers reserved for the use of
309 engines in the group. See DSA 277 engines in the group. See DSA spec v1.2 9.2.18 GRPCFG Read Buffers
310 Reserved. 278 Reserved.
311 It's not visible when the devi 279 It's not visible when the device does not support Read Buffer
312 allocation control. 280 allocation control.
313 281
314 What: /sys/bus/dsa/devices/group<m>. 282 What: /sys/bus/dsa/devices/group<m>.<n>/desc_progress_limit
315 Date: Sept 14, 2022 283 Date: Sept 14, 2022
316 KernelVersion: 6.0.0 284 KernelVersion: 6.0.0
317 Contact: dmaengine@vger.kernel.org 285 Contact: dmaengine@vger.kernel.org
318 Description: Allows control of the number o 286 Description: Allows control of the number of work descriptors that can be
319 concurrently processed by an e 287 concurrently processed by an engine in the group as a fraction
320 of the Maximum Work Descriptor 288 of the Maximum Work Descriptors in Progress value specified in
321 the ENGCAP register. The accep 289 the ENGCAP register. The acceptable values are 0 (default),
322 1 (1/2 of max value), 2 (1/4 o 290 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 291 the max value). It's visible only on platforms that support
324 the capability. 292 the capability.
325 293
326 What: /sys/bus/dsa/devices/group<m>. 294 What: /sys/bus/dsa/devices/group<m>.<n>/batch_progress_limit
327 Date: Sept 14, 2022 295 Date: Sept 14, 2022
328 KernelVersion: 6.0.0 296 KernelVersion: 6.0.0
329 Contact: dmaengine@vger.kernel.org 297 Contact: dmaengine@vger.kernel.org
330 Description: Allows control of the number o 298 Description: Allows control of the number of batch descriptors that can be
331 concurrently processed by an e 299 concurrently processed by an engine in the group as a fraction
332 of the Maximum Batch Descripto 300 of the Maximum Batch Descriptors in Progress value specified in
333 the ENGCAP register. The accep 301 the ENGCAP register. The acceptable values are 0 (default),
334 1 (1/2 of max value), 2 (1/4 o 302 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 303 the max value). It's visible only on platforms that support
336 the capability. 304 the capability.
337 <<
338 What: /sys/bus/dsa/devices/wq<m>.<n> <<
339 Date: Sept 14, 2022 <<
340 KernelVersion: 6.4.0 <<
341 Contact: dmaengine@vger.kernel.org <<
342 Description: Show the number of Completion <<
343 has caused. <<
344 <<
345 What: /sys/bus/dsa/devices/wq<m>.<n> <<
346 Date: Sept 14, 2022 <<
347 KernelVersion: 6.4.0 <<
348 Contact: dmaengine@vger.kernel.org <<
349 Description: Show the number of Completion <<
350 application has caused. The fa <<
351 driver cannot fault in the add <<
352 by a bad address programmed in <<
353 submitter is using bad CR addr <<
354 <<
355 What: /sys/bus/dsa/devices/wq<m>.<n> <<
356 Date: Sept 14, 2022 <<
357 KernelVersion: 6.4.0 <<
358 Contact: dmaengine@vger.kernel.org <<
359 Description: Show the process id of the app <<
360 helpful information for a moni <<
361 application that opened the fi <<
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