1 |
|
|
/*************************************************************************** |
2 |
|
|
* Copyright (c) 2024 Microsoft Corporation |
3 |
|
|
* |
4 |
|
|
* This program and the accompanying materials are made available under the |
5 |
|
|
* terms of the MIT License which is available at |
6 |
|
|
* https://opensource.org/licenses/MIT. |
7 |
|
|
* |
8 |
|
|
* SPDX-License-Identifier: MIT |
9 |
|
|
**************************************************************************/ |
10 |
|
|
|
11 |
|
|
|
12 |
|
|
/**************************************************************************/ |
13 |
|
|
/**************************************************************************/ |
14 |
|
|
/** */ |
15 |
|
|
/** USBX Component */ |
16 |
|
|
/** */ |
17 |
|
|
/** Device Storage Class */ |
18 |
|
|
/** */ |
19 |
|
|
/**************************************************************************/ |
20 |
|
|
/**************************************************************************/ |
21 |
|
|
|
22 |
|
|
|
23 |
|
|
/* Include necessary system files. */ |
24 |
|
|
|
25 |
|
|
#define UX_SOURCE_CODE |
26 |
|
|
|
27 |
|
|
#include "ux_api.h" |
28 |
|
|
#include "ux_device_class_storage.h" |
29 |
|
|
#include "ux_device_stack.h" |
30 |
|
|
|
31 |
|
|
|
32 |
|
|
/**************************************************************************/ |
33 |
|
|
/* */ |
34 |
|
|
/* FUNCTION RELEASE */ |
35 |
|
|
/* */ |
36 |
|
|
/* _ux_device_class_storage_read PORTABLE C */ |
37 |
|
|
/* 6.1.10 */ |
38 |
|
|
/* AUTHOR */ |
39 |
|
|
/* */ |
40 |
|
|
/* Chaoqiong Xiao, Microsoft Corporation */ |
41 |
|
|
/* */ |
42 |
|
|
/* DESCRIPTION */ |
43 |
|
|
/* */ |
44 |
|
|
/* This function performs a READ command in 32 or 16 bits. */ |
45 |
|
|
/* */ |
46 |
|
|
/* INPUT */ |
47 |
|
|
/* */ |
48 |
|
|
/* storage Pointer to storage class */ |
49 |
|
|
/* endpoint_in Pointer to IN endpoint */ |
50 |
|
|
/* endpoint_out Pointer to OUT endpoint */ |
51 |
|
|
/* cbwcb Pointer to CBWCB */ |
52 |
|
|
/* scsi_command SCSI command */ |
53 |
|
|
/* */ |
54 |
|
|
/* OUTPUT */ |
55 |
|
|
/* */ |
56 |
|
|
/* Completion Status */ |
57 |
|
|
/* */ |
58 |
|
|
/* CALLS */ |
59 |
|
|
/* */ |
60 |
|
|
/* (ux_slave_class_storage_media_read) Read from media */ |
61 |
|
|
/* (ux_slave_class_storage_media_status) Get media status */ |
62 |
|
|
/* _ux_device_stack_endpoint_stall Stall endpoint */ |
63 |
|
|
/* _ux_device_stack_transfer_request Transfer request */ |
64 |
|
|
/* _ux_utility_long_get_big_endian Get 32-bit big endian */ |
65 |
|
|
/* _ux_utility_short_get_big_endian Get 16-bit big endian */ |
66 |
|
|
/* _ux_device_class_storage_csw_send Send CSW */ |
67 |
|
|
/* */ |
68 |
|
|
/* CALLED BY */ |
69 |
|
|
/* */ |
70 |
|
|
/* Device Storage Class */ |
71 |
|
|
/* */ |
72 |
|
|
/* RELEASE HISTORY */ |
73 |
|
|
/* */ |
74 |
|
|
/* DATE NAME DESCRIPTION */ |
75 |
|
|
/* */ |
76 |
|
|
/* 05-19-2020 Chaoqiong Xiao Initial Version 6.0 */ |
77 |
|
|
/* 09-30-2020 Chaoqiong Xiao Modified comment(s), */ |
78 |
|
|
/* optimized command logic, */ |
79 |
|
|
/* resulting in version 6.1 */ |
80 |
|
|
/* 12-31-2020 Chaoqiong Xiao Modified comment(s), */ |
81 |
|
|
/* fixed USB CV test issues, */ |
82 |
|
|
/* resulting in version 6.1.3 */ |
83 |
|
|
/* 01-31-2022 Chaoqiong Xiao Modified comment(s), */ |
84 |
|
|
/* added standalone support, */ |
85 |
|
|
/* resulting in version 6.1.10 */ |
86 |
|
|
/* */ |
87 |
|
|
/**************************************************************************/ |
88 |
|
615 |
UINT _ux_device_class_storage_read(UX_SLAVE_CLASS_STORAGE *storage, ULONG lun, |
89 |
|
|
UX_SLAVE_ENDPOINT *endpoint_in, |
90 |
|
|
UX_SLAVE_ENDPOINT *endpoint_out, UCHAR * cbwcb, UCHAR scsi_command) |
91 |
|
|
{ |
92 |
|
|
|
93 |
|
|
UINT status; |
94 |
|
|
ULONG lba; |
95 |
|
|
UX_SLAVE_TRANSFER *transfer_request; |
96 |
|
|
ULONG total_number_blocks; |
97 |
|
|
ULONG media_status; |
98 |
|
|
ULONG total_length; |
99 |
|
|
|
100 |
|
|
#if !defined(UX_DEVICE_STANDALONE) |
101 |
|
|
ULONG number_blocks; |
102 |
|
|
ULONG transfer_length; |
103 |
|
|
ULONG done_length; |
104 |
|
|
#endif |
105 |
|
|
|
106 |
|
|
|
107 |
|
|
UX_PARAMETER_NOT_USED(endpoint_out); |
108 |
|
|
|
109 |
|
|
/* Get the LBA from the CBWCB. */ |
110 |
|
615 |
lba = _ux_utility_long_get_big_endian(cbwcb + UX_SLAVE_CLASS_STORAGE_READ_LBA); |
111 |
|
|
|
112 |
|
|
/* The type of commands will tell us the width of the field containing the number |
113 |
|
|
of sectors to read. */ |
114 |
✓✓ |
615 |
if (scsi_command == UX_SLAVE_CLASS_STORAGE_SCSI_READ16) |
115 |
|
|
|
116 |
|
|
/* Get the number of blocks from the CBWCB in 16 bits. */ |
117 |
|
614 |
total_number_blocks = _ux_utility_short_get_big_endian(cbwcb + UX_SLAVE_CLASS_STORAGE_READ_TRANSFER_LENGTH_16); |
118 |
|
|
|
119 |
|
|
else |
120 |
|
|
|
121 |
|
|
/* Get the number of blocks from the CBWCB in 32 bits. */ |
122 |
|
1 |
total_number_blocks = _ux_utility_long_get_big_endian(cbwcb + UX_SLAVE_CLASS_STORAGE_READ_TRANSFER_LENGTH_32); |
123 |
|
|
|
124 |
|
|
/* Obtain the pointer to the transfer request. */ |
125 |
|
615 |
transfer_request = &endpoint_in -> ux_slave_endpoint_transfer_request; |
126 |
|
|
|
127 |
|
|
/* Compute the total length to transfer and how much remains. */ |
128 |
|
615 |
total_length = total_number_blocks * storage -> ux_slave_class_storage_lun[lun].ux_slave_class_storage_media_block_length; |
129 |
|
|
|
130 |
|
|
/* Default CSW to failed. */ |
131 |
|
615 |
storage -> ux_slave_class_storage_csw_status = UX_SLAVE_CLASS_STORAGE_CSW_FAILED; |
132 |
|
|
|
133 |
|
|
#if defined(UX_DEVICE_STANDALONE) |
134 |
|
|
|
135 |
|
|
/* Obtain the status of the device. */ |
136 |
|
|
status = storage -> ux_slave_class_storage_lun[lun].ux_slave_class_storage_media_status(storage, lun, |
137 |
|
|
storage -> ux_slave_class_storage_lun[lun].ux_slave_class_storage_media_id, &media_status); |
138 |
|
|
|
139 |
|
|
/* Update the request sense. */ |
140 |
|
|
storage -> ux_slave_class_storage_lun[lun].ux_slave_class_storage_request_sense_status = media_status; |
141 |
|
|
|
142 |
|
|
/* Update the request to use. */ |
143 |
|
|
storage -> ux_device_class_storage_transfer = transfer_request; |
144 |
|
|
|
145 |
|
|
/* If there is a problem, return a failed command. */ |
146 |
|
|
if (status != UX_SUCCESS) |
147 |
|
|
{ |
148 |
|
|
|
149 |
|
|
/* Update residue. */ |
150 |
|
|
storage -> ux_slave_class_storage_csw_residue = storage -> ux_slave_class_storage_host_length; |
151 |
|
|
|
152 |
|
|
/* Return an error. */ |
153 |
|
|
return(UX_ERROR); |
154 |
|
|
} |
155 |
|
|
|
156 |
|
|
/* Next: Disk read -> Transfer (DATA). */ |
157 |
|
|
storage -> ux_device_class_storage_state = UX_DEVICE_CLASS_STORAGE_STATE_DISK_WAIT; |
158 |
|
|
storage -> ux_device_class_storage_cmd_state = UX_DEVICE_CLASS_STORAGE_CMD_READ; |
159 |
|
|
storage -> ux_device_class_storage_disk_state = UX_DEVICE_CLASS_STORAGE_DISK_OP_START; |
160 |
|
|
storage -> ux_device_class_storage_buffer_state[0] = UX_DEVICE_CLASS_STORAGE_BUFFER_EMPTY; |
161 |
|
|
storage -> ux_device_class_storage_buffer_state[1] = UX_DEVICE_CLASS_STORAGE_BUFFER_EMPTY; |
162 |
|
|
storage -> ux_device_class_storage_buffer_usb = 1; |
163 |
|
|
storage -> ux_device_class_storage_buffer_disk = 1; |
164 |
|
|
|
165 |
|
|
storage -> ux_device_class_storage_device_length = total_length; |
166 |
|
|
storage -> ux_device_class_storage_data_length = |
167 |
|
|
UX_MIN(total_length , storage -> ux_slave_class_storage_host_length); |
168 |
|
|
storage -> ux_device_class_storage_data_count = 0; |
169 |
|
|
|
170 |
|
|
storage -> ux_device_class_storage_cmd_lba = lba; |
171 |
|
|
storage -> ux_device_class_storage_cmd_n_lb = total_number_blocks; |
172 |
|
|
|
173 |
|
|
#else |
174 |
|
|
|
175 |
|
|
/* Check transfer length. */ |
176 |
|
|
|
177 |
|
|
/* Case (7). Host length < device length. */ |
178 |
✓✓ |
615 |
if (total_length > storage -> ux_slave_class_storage_host_length) |
179 |
|
|
{ |
180 |
|
1 |
_ux_device_stack_endpoint_stall(endpoint_in); |
181 |
|
1 |
storage -> ux_slave_class_storage_csw_status = UX_SLAVE_CLASS_STORAGE_CSW_PHASE_ERROR; |
182 |
|
1 |
return(UX_ERROR); |
183 |
|
|
} |
184 |
|
|
|
185 |
|
|
/* Case (8). Hi <> Do. */ |
186 |
✓✓ |
614 |
if ((storage -> ux_slave_class_storage_cbw_flags & 0x80) == 0) |
187 |
|
|
{ |
188 |
|
1 |
_ux_device_stack_endpoint_stall(endpoint_out); |
189 |
|
1 |
storage -> ux_slave_class_storage_csw_status = UX_SLAVE_CLASS_STORAGE_CSW_PHASE_ERROR; |
190 |
|
1 |
return(UX_ERROR); |
191 |
|
|
} |
192 |
|
|
|
193 |
|
|
/* It may take several transfers to send the requested data. */ |
194 |
|
613 |
done_length = 0; |
195 |
✓✓ |
1207 |
while (total_number_blocks) |
196 |
|
|
{ |
197 |
|
|
|
198 |
|
|
/* Obtain the status of the device. */ |
199 |
|
618 |
status = storage -> ux_slave_class_storage_lun[lun].ux_slave_class_storage_media_status(storage, lun, |
200 |
|
|
storage -> ux_slave_class_storage_lun[lun].ux_slave_class_storage_media_id, &media_status); |
201 |
|
|
|
202 |
|
|
/* Update the request sense. */ |
203 |
|
618 |
storage -> ux_slave_class_storage_lun[lun].ux_slave_class_storage_request_sense_status = media_status; |
204 |
|
|
|
205 |
|
|
/* If there is a problem, return a failed command. */ |
206 |
✓✓ |
618 |
if (status != UX_SUCCESS) |
207 |
|
|
{ |
208 |
|
|
|
209 |
|
|
/* We have a problem, media status error. Return a bad completion and wait for the |
210 |
|
|
REQUEST_SENSE command. */ |
211 |
|
1 |
_ux_device_stack_endpoint_stall(endpoint_in); |
212 |
|
|
|
213 |
|
|
/* Update residue. */ |
214 |
|
1 |
storage -> ux_slave_class_storage_csw_residue = storage -> ux_slave_class_storage_host_length - done_length; |
215 |
|
|
|
216 |
|
|
/* Return an error. */ |
217 |
|
1 |
return(UX_ERROR); |
218 |
|
|
} |
219 |
|
|
|
220 |
|
|
/* How much can we send in this transfer? */ |
221 |
✓✓ |
617 |
if (total_length > UX_SLAVE_CLASS_STORAGE_BUFFER_SIZE) |
222 |
|
|
|
223 |
|
|
/* Compute the transfer length based on the maximum allowed. */ |
224 |
|
6 |
transfer_length = UX_SLAVE_CLASS_STORAGE_BUFFER_SIZE; |
225 |
|
|
|
226 |
|
|
else |
227 |
|
|
|
228 |
|
|
/* Compute the transfer length based on what is left to transfer. */ |
229 |
|
611 |
transfer_length = total_length; |
230 |
|
|
|
231 |
|
|
/* Compute the number of blocks to transfer. */ |
232 |
|
617 |
number_blocks = transfer_length / storage -> ux_slave_class_storage_lun[lun].ux_slave_class_storage_media_block_length; |
233 |
|
|
|
234 |
|
|
/* If trace is enabled, insert this event into the trace buffer. */ |
235 |
|
|
UX_TRACE_IN_LINE_INSERT(UX_TRACE_DEVICE_CLASS_STORAGE_READ, storage, lun, transfer_request -> ux_slave_transfer_request_data_pointer, |
236 |
|
|
number_blocks, UX_TRACE_DEVICE_CLASS_EVENTS, 0, 0) |
237 |
|
|
|
238 |
|
|
/* Execute the read command from the local media. */ |
239 |
|
617 |
status = storage -> ux_slave_class_storage_lun[lun].ux_slave_class_storage_media_read(storage, lun, |
240 |
|
|
transfer_request -> ux_slave_transfer_request_data_pointer, number_blocks, lba, &media_status); |
241 |
|
|
|
242 |
|
|
/* If there is a problem, return a failed command. */ |
243 |
✓✓ |
617 |
if (status != UX_SUCCESS) |
244 |
|
|
{ |
245 |
|
|
|
246 |
|
|
/* We have a problem, request error. Return a bad completion and wait for the |
247 |
|
|
REQUEST_SENSE command. */ |
248 |
|
21 |
_ux_device_stack_endpoint_stall(endpoint_in); |
249 |
|
|
|
250 |
|
|
/* Update residue. */ |
251 |
|
21 |
storage -> ux_slave_class_storage_csw_residue = storage -> ux_slave_class_storage_host_length - done_length; |
252 |
|
|
|
253 |
|
|
/* And update the REQUEST_SENSE codes. */ |
254 |
|
21 |
storage -> ux_slave_class_storage_lun[lun].ux_slave_class_storage_request_sense_status = media_status; |
255 |
|
|
|
256 |
|
|
/* Return an error. */ |
257 |
|
21 |
return(UX_ERROR); |
258 |
|
|
} |
259 |
|
|
|
260 |
|
|
/* Sends the data payload back to the caller. */ |
261 |
|
596 |
status = _ux_device_stack_transfer_request(transfer_request, transfer_length, transfer_length); |
262 |
|
|
|
263 |
|
|
/* Check the status. */ |
264 |
✓✓ |
595 |
if(status != UX_SUCCESS) |
265 |
|
|
{ |
266 |
|
|
|
267 |
|
|
/* We have a problem, request error. Return a bad completion and wait for the |
268 |
|
|
REQUEST_SENSE command. */ |
269 |
|
1 |
_ux_device_stack_endpoint_stall(endpoint_in); |
270 |
|
|
|
271 |
|
|
/* Update residue. */ |
272 |
|
1 |
storage -> ux_slave_class_storage_csw_residue = storage -> ux_slave_class_storage_host_length - done_length; |
273 |
|
|
|
274 |
|
|
/* Update the REQUEST_SENSE codes. */ |
275 |
|
1 |
storage -> ux_slave_class_storage_lun[lun].ux_slave_class_storage_request_sense_status = |
276 |
|
|
UX_DEVICE_CLASS_STORAGE_SENSE_STATUS(0x02,0x54,0x00); |
277 |
|
|
|
278 |
|
|
/* Return an error. */ |
279 |
|
1 |
return(UX_ERROR); |
280 |
|
|
|
281 |
|
|
} |
282 |
|
|
|
283 |
|
|
/* Update the LBA address. */ |
284 |
|
594 |
lba += number_blocks; |
285 |
|
|
|
286 |
|
|
/* Update the length to remain. */ |
287 |
|
594 |
total_length -= transfer_length; |
288 |
|
594 |
done_length += transfer_length; |
289 |
|
|
|
290 |
|
|
/* Update the number of blocks to read. */ |
291 |
|
594 |
total_number_blocks -= number_blocks; |
292 |
|
|
} |
293 |
|
|
|
294 |
|
|
/* Case (4), (5). Host length too large. */ |
295 |
✓✓ |
589 |
if (storage -> ux_slave_class_storage_host_length > done_length) |
296 |
|
|
{ |
297 |
|
|
|
298 |
|
|
/* Stall Bulk-In. */ |
299 |
|
1 |
_ux_device_stack_endpoint_stall(endpoint_in); |
300 |
|
|
|
301 |
|
|
/* Update residure. */ |
302 |
|
1 |
storage -> ux_slave_class_storage_csw_residue = storage -> ux_slave_class_storage_host_length - done_length; |
303 |
|
|
} |
304 |
|
|
|
305 |
|
|
#endif /* else defined(UX_DEVICE_STANDALONE) */ |
306 |
|
|
|
307 |
|
|
/* Now we set the CSW with success. */ |
308 |
|
589 |
storage -> ux_slave_class_storage_csw_status = UX_SLAVE_CLASS_STORAGE_CSW_PASSED; |
309 |
|
|
|
310 |
|
|
/* Return completion status. */ |
311 |
|
589 |
return(UX_SUCCESS); |
312 |
|
|
} |