2 * linux/include/asm-s390/qdio.h
4 * Copyright 2000,2008 IBM Corp.
5 * Author(s): Utz Bacher <utz.bacher@de.ibm.com>
6 * Jan Glauber <jang@linux.vnet.ibm.com>
12 #include <linux/interrupt.h>
14 #include <asm/ccwdev.h>
16 /* only use 4 queues to save some cachelines */
17 #define QDIO_MAX_QUEUES_PER_IRQ 4
18 #define QDIO_MAX_BUFFERS_PER_Q 128
19 #define QDIO_MAX_BUFFERS_MASK (QDIO_MAX_BUFFERS_PER_Q - 1)
20 #define QDIO_MAX_ELEMENTS_PER_BUFFER 16
21 #define QDIO_SBAL_SIZE 256
23 #define QDIO_QETH_QFMT 0
24 #define QDIO_ZFCP_QFMT 1
25 #define QDIO_IQDIO_QFMT 2
28 * struct qdesfmt0 - queue descriptor, format 0
29 * @sliba: storage list information block address
30 * @sla: storage list address
31 * @slsba: storage list state block address
32 * @akey: access key for DLIB
33 * @bkey: access key for SL
34 * @ckey: access key for SBALs
35 * @dkey: access key for SLSB
47 } __attribute__ ((packed));
50 * struct qdr - queue description record (QDR)
52 * @pfmt: implementation dependent parameter format
53 * @ac: adapter characteristics
54 * @iqdcnt: input queue descriptor count
55 * @oqdcnt: output queue descriptor count
56 * @iqdsz: inpout queue descriptor size
57 * @oqdsz: output queue descriptor size
58 * @qiba: queue information block address
59 * @qkey: queue information block key
60 * @qdf0: queue descriptions
82 struct qdesfmt0 qdf0[126];
83 } __attribute__ ((packed, aligned(4096)));
85 #define QIB_AC_OUTBOUND_PCI_SUPPORTED 0x40
86 #define QIB_RFLAGS_ENABLE_QEBSM 0x80
89 * struct qib - queue information block (QIB)
91 * @pfmt: implementation dependent parameter format
93 * @ac: adapter characteristics
94 * @isliba: absolute address of first input SLIB
95 * @osliba: absolute address of first output SLIB
96 * @ebcnam: adapter identifier in EBCDIC
97 * @parm: implementation dependent parameters
113 u8 parm[QDIO_MAX_BUFFERS_PER_Q];
114 } __attribute__ ((packed, aligned(256)));
117 * struct slibe - storage list information block element (SLIBE)
118 * @parms: implementation dependent parameters
125 * struct slib - storage list information block (SLIB)
126 * @nsliba: next SLIB address (if any)
128 * @slsba: SLSB address
129 * @slibe: SLIB elements
138 struct slibe slibe[QDIO_MAX_BUFFERS_PER_Q];
139 } __attribute__ ((packed, aligned(2048)));
142 * struct sbal_flags - storage block address list flags
144 * @cont: contiguous storage
145 * @frag: fragmentation
154 } __attribute__ ((packed));
156 #define SBAL_FLAGS_FIRST_FRAG 0x04000000UL
157 #define SBAL_FLAGS_MIDDLE_FRAG 0x08000000UL
158 #define SBAL_FLAGS_LAST_FRAG 0x0c000000UL
159 #define SBAL_FLAGS_LAST_ENTRY 0x40000000UL
160 #define SBAL_FLAGS_CONTIGUOUS 0x20000000UL
162 #define SBAL_FLAGS0_DATA_CONTINUATION 0x20UL
164 /* Awesome OpenFCP extensions */
165 #define SBAL_FLAGS0_TYPE_STATUS 0x00UL
166 #define SBAL_FLAGS0_TYPE_WRITE 0x08UL
167 #define SBAL_FLAGS0_TYPE_READ 0x10UL
168 #define SBAL_FLAGS0_TYPE_WRITE_READ 0x18UL
169 #define SBAL_FLAGS0_MORE_SBALS 0x04UL
170 #define SBAL_FLAGS0_COMMAND 0x02UL
171 #define SBAL_FLAGS0_LAST_SBAL 0x00UL
172 #define SBAL_FLAGS0_ONLY_SBAL SBAL_FLAGS0_COMMAND
173 #define SBAL_FLAGS0_MIDDLE_SBAL SBAL_FLAGS0_MORE_SBALS
174 #define SBAL_FLAGS0_FIRST_SBAL SBAL_FLAGS0_MORE_SBALS | SBAL_FLAGS0_COMMAND
175 #define SBAL_FLAGS0_PCI 0x40
178 * struct sbal_sbalf_0 - sbal flags for sbale 0
179 * @pci: PCI indicator
180 * @cont: data continuation
181 * @sbtype: storage-block type (FCP)
183 struct sbal_sbalf_0 {
189 } __attribute__ ((packed));
192 * struct sbal_sbalf_1 - sbal flags for sbale 1
195 struct sbal_sbalf_1 {
198 } __attribute__ ((packed));
201 * struct sbal_sbalf_14 - sbal flags for sbale 14
202 * @erridx: error index
204 struct sbal_sbalf_14 {
207 } __attribute__ ((packed));
210 * struct sbal_sbalf_15 - sbal flags for sbale 15
211 * @reason: reason for error state
213 struct sbal_sbalf_15 {
215 } __attribute__ ((packed));
218 * union sbal_sbalf - storage block address list flags
226 struct sbal_sbalf_0 i0;
227 struct sbal_sbalf_1 i1;
228 struct sbal_sbalf_14 i14;
229 struct sbal_sbalf_15 i15;
234 * struct qdio_buffer_element - SBAL entry
239 struct qdio_buffer_element {
248 } __attribute__ ((packed, aligned(16)));
251 * struct qdio_buffer - storage block address list (SBAL)
252 * @element: SBAL entries
255 struct qdio_buffer_element element[QDIO_MAX_ELEMENTS_PER_BUFFER];
256 } __attribute__ ((packed, aligned(256)));
259 * struct sl_element - storage list entry
260 * @sbal: absolute SBAL address
265 unsigned long reserved;
269 } __attribute__ ((packed));
272 * struct sl - storage list (SL)
273 * @element: SL entries
276 struct sl_element element[QDIO_MAX_BUFFERS_PER_Q];
277 } __attribute__ ((packed, aligned(1024)));
280 * struct slsb - storage list state block (SLSB)
281 * @val: state per buffer
284 u8 val[QDIO_MAX_BUFFERS_PER_Q];
285 } __attribute__ ((packed, aligned(256)));
287 struct qdio_ssqd_desc {
310 } __attribute__ ((packed));
312 /* params are: ccw_device, qdio_error, queue_number,
313 first element processed, number of elements processed, int_parm */
314 typedef void qdio_handler_t(struct ccw_device *, unsigned int, int,
315 int, int, unsigned long);
317 /* qdio errors reported to the upper-layer program */
318 #define QDIO_ERROR_SIGA_TARGET 0x02
319 #define QDIO_ERROR_SIGA_ACCESS_EXCEPTION 0x10
320 #define QDIO_ERROR_SIGA_BUSY 0x20
321 #define QDIO_ERROR_ACTIVATE_CHECK_CONDITION 0x40
322 #define QDIO_ERROR_SLSB_STATE 0x80
324 /* for qdio_cleanup */
325 #define QDIO_FLAG_CLEANUP_USING_CLEAR 0x01
326 #define QDIO_FLAG_CLEANUP_USING_HALT 0x02
329 * struct qdio_initialize - qdio initalization data
330 * @cdev: associated ccw device
331 * @q_format: queue format
332 * @adapter_name: name for the adapter
333 * @qib_param_field_format: format for qib_parm_field
334 * @qib_param_field: pointer to 128 bytes or NULL, if no param field
335 * @input_slib_elements: pointer to no_input_qs * 128 words of data or NULL
336 * @output_slib_elements: pointer to no_output_qs * 128 words of data or NULL
337 * @no_input_qs: number of input queues
338 * @no_output_qs: number of output queues
339 * @input_handler: handler to be called for input queues
340 * @output_handler: handler to be called for output queues
341 * @int_parm: interruption parameter
342 * @input_sbal_addr_array: address of no_input_qs * 128 pointers
343 * @output_sbal_addr_array: address of no_output_qs * 128 pointers
345 struct qdio_initialize {
346 struct ccw_device *cdev;
347 unsigned char q_format;
348 unsigned char adapter_name[8];
349 unsigned int qib_param_field_format;
350 unsigned char *qib_param_field;
351 unsigned long *input_slib_elements;
352 unsigned long *output_slib_elements;
353 unsigned int no_input_qs;
354 unsigned int no_output_qs;
355 qdio_handler_t *input_handler;
356 qdio_handler_t *output_handler;
357 unsigned long int_parm;
358 void **input_sbal_addr_array;
359 void **output_sbal_addr_array;
362 #define QDIO_STATE_INACTIVE 0x00000002 /* after qdio_cleanup */
363 #define QDIO_STATE_ESTABLISHED 0x00000004 /* after qdio_establish */
364 #define QDIO_STATE_ACTIVE 0x00000008 /* after qdio_activate */
365 #define QDIO_STATE_STOPPED 0x00000010 /* after queues went down */
367 #define QDIO_FLAG_SYNC_INPUT 0x01
368 #define QDIO_FLAG_SYNC_OUTPUT 0x02
369 #define QDIO_FLAG_PCI_OUT 0x10
371 extern int qdio_initialize(struct qdio_initialize *);
372 extern int qdio_allocate(struct qdio_initialize *);
373 extern int qdio_establish(struct qdio_initialize *);
374 extern int qdio_activate(struct ccw_device *);
376 extern int do_QDIO(struct ccw_device *cdev, unsigned int callflags,
377 int q_nr, unsigned int bufnr, unsigned int count);
378 extern int qdio_cleanup(struct ccw_device*, int);
379 extern int qdio_shutdown(struct ccw_device*, int);
380 extern int qdio_free(struct ccw_device *);
381 extern int qdio_get_ssqd_desc(struct ccw_device *dev, struct qdio_ssqd_desc*);
383 #endif /* __QDIO_H__ */