1 /* 2 * linux/include/asm-s390/qdio.h 3 * 4 * Copyright 2000,2008 IBM Corp. 5 * Author(s): Utz Bacher <utz.bacher@de.ibm.com> 6 * Jan Glauber <jang@linux.vnet.ibm.com> 7 * 8 */ 9 #ifndef __QDIO_H__ 10 #define __QDIO_H__ 11 12 #include <linux/interrupt.h> 13 #include <asm/cio.h> 14 #include <asm/ccwdev.h> 15 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 22 23 #define QDIO_QETH_QFMT 0 24 #define QDIO_ZFCP_QFMT 1 25 #define QDIO_IQDIO_QFMT 2 26 27 /** 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 36 */ 37 struct qdesfmt0 { 38 u64 sliba; 39 u64 sla; 40 u64 slsba; 41 u32 : 32; 42 u32 akey : 4; 43 u32 bkey : 4; 44 u32 ckey : 4; 45 u32 dkey : 4; 46 u32 : 16; 47 } __attribute__ ((packed)); 48 49 #define QDR_AC_MULTI_BUFFER_ENABLE 0x01 50 51 /** 52 * struct qdr - queue description record (QDR) 53 * @qfmt: queue format 54 * @pfmt: implementation dependent parameter format 55 * @ac: adapter characteristics 56 * @iqdcnt: input queue descriptor count 57 * @oqdcnt: output queue descriptor count 58 * @iqdsz: inpout queue descriptor size 59 * @oqdsz: output queue descriptor size 60 * @qiba: queue information block address 61 * @qkey: queue information block key 62 * @qdf0: queue descriptions 63 */ 64 struct qdr { 65 u32 qfmt : 8; 66 u32 pfmt : 8; 67 u32 : 8; 68 u32 ac : 8; 69 u32 : 8; 70 u32 iqdcnt : 8; 71 u32 : 8; 72 u32 oqdcnt : 8; 73 u32 : 8; 74 u32 iqdsz : 8; 75 u32 : 8; 76 u32 oqdsz : 8; 77 /* private: */ 78 u32 res[9]; 79 /* public: */ 80 u64 qiba; 81 u32 : 32; 82 u32 qkey : 4; 83 u32 : 28; 84 struct qdesfmt0 qdf0[126]; 85 } __attribute__ ((packed, aligned(4096))); 86 87 #define QIB_AC_OUTBOUND_PCI_SUPPORTED 0x40 88 #define QIB_RFLAGS_ENABLE_QEBSM 0x80 89 #define QIB_RFLAGS_ENABLE_DATA_DIV 0x02 90 91 /** 92 * struct qib - queue information block (QIB) 93 * @qfmt: queue format 94 * @pfmt: implementation dependent parameter format 95 * @rflags: QEBSM 96 * @ac: adapter characteristics 97 * @isliba: absolute address of first input SLIB 98 * @osliba: absolute address of first output SLIB 99 * @ebcnam: adapter identifier in EBCDIC 100 * @parm: implementation dependent parameters 101 */ 102 struct qib { 103 u32 qfmt : 8; 104 u32 pfmt : 8; 105 u32 rflags : 8; 106 u32 ac : 8; 107 u32 : 32; 108 u64 isliba; 109 u64 osliba; 110 u32 : 32; 111 u32 : 32; 112 u8 ebcnam[8]; 113 /* private: */ 114 u8 res[88]; 115 /* public: */ 116 u8 parm[QDIO_MAX_BUFFERS_PER_Q]; 117 } __attribute__ ((packed, aligned(256))); 118 119 /** 120 * struct slibe - storage list information block element (SLIBE) 121 * @parms: implementation dependent parameters 122 */ 123 struct slibe { 124 u64 parms; 125 }; 126 127 /** 128 * struct qaob - queue asynchronous operation block 129 * @res0: reserved parameters 130 * @res1: reserved parameter 131 * @res2: reserved parameter 132 * @res3: reserved parameter 133 * @aorc: asynchronous operation return code 134 * @flags: internal flags 135 * @cbtbs: control block type 136 * @sb_count: number of storage blocks 137 * @sba: storage block element addresses 138 * @dcount: size of storage block elements 139 * @user0: user defineable value 140 * @res4: reserved paramater 141 * @user1: user defineable value 142 * @user2: user defineable value 143 */ 144 struct qaob { 145 u64 res0[6]; 146 u8 res1; 147 u8 res2; 148 u8 res3; 149 u8 aorc; 150 u8 flags; 151 u16 cbtbs; 152 u8 sb_count; 153 u64 sba[QDIO_MAX_ELEMENTS_PER_BUFFER]; 154 u16 dcount[QDIO_MAX_ELEMENTS_PER_BUFFER]; 155 u64 user0; 156 u64 res4[2]; 157 u64 user1; 158 u64 user2; 159 } __attribute__ ((packed, aligned(256))); 160 161 /** 162 * struct slib - storage list information block (SLIB) 163 * @nsliba: next SLIB address (if any) 164 * @sla: SL address 165 * @slsba: SLSB address 166 * @slibe: SLIB elements 167 */ 168 struct slib { 169 u64 nsliba; 170 u64 sla; 171 u64 slsba; 172 /* private: */ 173 u8 res[1000]; 174 /* public: */ 175 struct slibe slibe[QDIO_MAX_BUFFERS_PER_Q]; 176 } __attribute__ ((packed, aligned(2048))); 177 178 #define SBAL_EFLAGS_LAST_ENTRY 0x40 179 #define SBAL_EFLAGS_CONTIGUOUS 0x20 180 #define SBAL_EFLAGS_FIRST_FRAG 0x04 181 #define SBAL_EFLAGS_MIDDLE_FRAG 0x08 182 #define SBAL_EFLAGS_LAST_FRAG 0x0c 183 #define SBAL_EFLAGS_MASK 0x6f 184 185 #define SBAL_SFLAGS0_PCI_REQ 0x40 186 #define SBAL_SFLAGS0_DATA_CONTINUATION 0x20 187 188 /* Awesome OpenFCP extensions */ 189 #define SBAL_SFLAGS0_TYPE_STATUS 0x00 190 #define SBAL_SFLAGS0_TYPE_WRITE 0x08 191 #define SBAL_SFLAGS0_TYPE_READ 0x10 192 #define SBAL_SFLAGS0_TYPE_WRITE_READ 0x18 193 #define SBAL_SFLAGS0_MORE_SBALS 0x04 194 #define SBAL_SFLAGS0_COMMAND 0x02 195 #define SBAL_SFLAGS0_LAST_SBAL 0x00 196 #define SBAL_SFLAGS0_ONLY_SBAL SBAL_SFLAGS0_COMMAND 197 #define SBAL_SFLAGS0_MIDDLE_SBAL SBAL_SFLAGS0_MORE_SBALS 198 #define SBAL_SFLAGS0_FIRST_SBAL (SBAL_SFLAGS0_MORE_SBALS | SBAL_SFLAGS0_COMMAND) 199 200 /** 201 * struct qdio_buffer_element - SBAL entry 202 * @eflags: SBAL entry flags 203 * @scount: SBAL count 204 * @sflags: whole SBAL flags 205 * @length: length 206 * @addr: address 207 */ 208 struct qdio_buffer_element { 209 u8 eflags; 210 /* private: */ 211 u8 res1; 212 /* public: */ 213 u8 scount; 214 u8 sflags; 215 u32 length; 216 #ifdef CONFIG_32BIT 217 /* private: */ 218 void *res2; 219 /* public: */ 220 #endif 221 void *addr; 222 } __attribute__ ((packed, aligned(16))); 223 224 /** 225 * struct qdio_buffer - storage block address list (SBAL) 226 * @element: SBAL entries 227 */ 228 struct qdio_buffer { 229 struct qdio_buffer_element element[QDIO_MAX_ELEMENTS_PER_BUFFER]; 230 } __attribute__ ((packed, aligned(256))); 231 232 /** 233 * struct sl_element - storage list entry 234 * @sbal: absolute SBAL address 235 */ 236 struct sl_element { 237 #ifdef CONFIG_32BIT 238 /* private: */ 239 unsigned long reserved; 240 /* public: */ 241 #endif 242 unsigned long sbal; 243 } __attribute__ ((packed)); 244 245 /** 246 * struct sl - storage list (SL) 247 * @element: SL entries 248 */ 249 struct sl { 250 struct sl_element element[QDIO_MAX_BUFFERS_PER_Q]; 251 } __attribute__ ((packed, aligned(1024))); 252 253 /** 254 * struct slsb - storage list state block (SLSB) 255 * @val: state per buffer 256 */ 257 struct slsb { 258 u8 val[QDIO_MAX_BUFFERS_PER_Q]; 259 } __attribute__ ((packed, aligned(256))); 260 261 #define CHSC_AC2_MULTI_BUFFER_AVAILABLE 0x0080 262 #define CHSC_AC2_MULTI_BUFFER_ENABLED 0x0040 263 #define CHSC_AC2_DATA_DIV_AVAILABLE 0x0010 264 #define CHSC_AC2_DATA_DIV_ENABLED 0x0002 265 266 /** 267 * struct qdio_outbuf_state - SBAL related asynchronous operation information 268 * (for communication with upper layer programs) 269 * (only required for use with completion queues) 270 * @flags: flags indicating state of buffer 271 * @aob: pointer to QAOB used for the particular SBAL 272 * @user: pointer to upper layer program's state information related to SBAL 273 * (stored in user1 data of QAOB) 274 */ 275 struct qdio_outbuf_state { 276 u8 flags; 277 struct qaob *aob; 278 void *user; 279 }; 280 281 #define QDIO_OUTBUF_STATE_FLAG_NONE 0x00 282 #define QDIO_OUTBUF_STATE_FLAG_PENDING 0x01 283 284 #define CHSC_AC1_INITIATE_INPUTQ 0x80 285 286 287 /* qdio adapter-characteristics-1 flag */ 288 #define AC1_SIGA_INPUT_NEEDED 0x40 /* process input queues */ 289 #define AC1_SIGA_OUTPUT_NEEDED 0x20 /* process output queues */ 290 #define AC1_SIGA_SYNC_NEEDED 0x10 /* ask hypervisor to sync */ 291 #define AC1_AUTOMATIC_SYNC_ON_THININT 0x08 /* set by hypervisor */ 292 #define AC1_AUTOMATIC_SYNC_ON_OUT_PCI 0x04 /* set by hypervisor */ 293 #define AC1_SC_QEBSM_AVAILABLE 0x02 /* available for subchannel */ 294 #define AC1_SC_QEBSM_ENABLED 0x01 /* enabled for subchannel */ 295 296 #define CHSC_AC2_DATA_DIV_AVAILABLE 0x0010 297 #define CHSC_AC2_DATA_DIV_ENABLED 0x0002 298 299 #define CHSC_AC3_FORMAT2_CQ_AVAILABLE 0x8000 300 301 struct qdio_ssqd_desc { 302 u8 flags; 303 u8:8; 304 u16 sch; 305 u8 qfmt; 306 u8 parm; 307 u8 qdioac1; 308 u8 sch_class; 309 u8 pcnt; 310 u8 icnt; 311 u8:8; 312 u8 ocnt; 313 u8:8; 314 u8 mbccnt; 315 u16 qdioac2; 316 u64 sch_token; 317 u8 mro; 318 u8 mri; 319 u16 qdioac3; 320 u16:16; 321 u8:8; 322 u8 mmwc; 323 } __attribute__ ((packed)); 324 325 /* params are: ccw_device, qdio_error, queue_number, 326 first element processed, number of elements processed, int_parm */ 327 typedef void qdio_handler_t(struct ccw_device *, unsigned int, int, 328 int, int, unsigned long); 329 330 /* qdio errors reported to the upper-layer program */ 331 #define QDIO_ERROR_SIGA_TARGET 0x02 332 #define QDIO_ERROR_SIGA_ACCESS_EXCEPTION 0x10 333 #define QDIO_ERROR_SIGA_BUSY 0x20 334 #define QDIO_ERROR_ACTIVATE_CHECK_CONDITION 0x40 335 #define QDIO_ERROR_SLSB_STATE 0x80 336 337 /* for qdio_cleanup */ 338 #define QDIO_FLAG_CLEANUP_USING_CLEAR 0x01 339 #define QDIO_FLAG_CLEANUP_USING_HALT 0x02 340 341 /** 342 * struct qdio_initialize - qdio initalization data 343 * @cdev: associated ccw device 344 * @q_format: queue format 345 * @adapter_name: name for the adapter 346 * @qib_param_field_format: format for qib_parm_field 347 * @qib_param_field: pointer to 128 bytes or NULL, if no param field 348 * @qib_rflags: rflags to set 349 * @input_slib_elements: pointer to no_input_qs * 128 words of data or NULL 350 * @output_slib_elements: pointer to no_output_qs * 128 words of data or NULL 351 * @no_input_qs: number of input queues 352 * @no_output_qs: number of output queues 353 * @input_handler: handler to be called for input queues 354 * @output_handler: handler to be called for output queues 355 * @queue_start_poll_array: polling handlers (one per input queue or NULL) 356 * @int_parm: interruption parameter 357 * @input_sbal_addr_array: address of no_input_qs * 128 pointers 358 * @output_sbal_addr_array: address of no_output_qs * 128 pointers 359 * @output_sbal_state_array: no_output_qs * 128 state info (for CQ or NULL) 360 */ 361 struct qdio_initialize { 362 struct ccw_device *cdev; 363 unsigned char q_format; 364 unsigned char qdr_ac; 365 unsigned char adapter_name[8]; 366 unsigned int qib_param_field_format; 367 unsigned char *qib_param_field; 368 unsigned char qib_rflags; 369 unsigned long *input_slib_elements; 370 unsigned long *output_slib_elements; 371 unsigned int no_input_qs; 372 unsigned int no_output_qs; 373 qdio_handler_t *input_handler; 374 qdio_handler_t *output_handler; 375 void (**queue_start_poll_array) (struct ccw_device *, int, 376 unsigned long); 377 int scan_threshold; 378 unsigned long int_parm; 379 void **input_sbal_addr_array; 380 void **output_sbal_addr_array; 381 struct qdio_outbuf_state *output_sbal_state_array; 382 }; 383 384 #define QDIO_STATE_INACTIVE 0x00000002 /* after qdio_cleanup */ 385 #define QDIO_STATE_ESTABLISHED 0x00000004 /* after qdio_establish */ 386 #define QDIO_STATE_ACTIVE 0x00000008 /* after qdio_activate */ 387 #define QDIO_STATE_STOPPED 0x00000010 /* after queues went down */ 388 389 #define QDIO_FLAG_SYNC_INPUT 0x01 390 #define QDIO_FLAG_SYNC_OUTPUT 0x02 391 #define QDIO_FLAG_PCI_OUT 0x10 392 393 extern int qdio_allocate(struct qdio_initialize *); 394 extern int qdio_establish(struct qdio_initialize *); 395 extern int qdio_activate(struct ccw_device *); 396 extern void qdio_release_aob(struct qaob *); 397 extern int do_QDIO(struct ccw_device *, unsigned int, int, unsigned int, 398 unsigned int); 399 extern int qdio_start_irq(struct ccw_device *, int); 400 extern int qdio_stop_irq(struct ccw_device *, int); 401 extern int qdio_get_next_buffers(struct ccw_device *, int, int *, int *); 402 extern int qdio_shutdown(struct ccw_device *, int); 403 extern int qdio_free(struct ccw_device *); 404 extern int qdio_get_ssqd_desc(struct ccw_device *, struct qdio_ssqd_desc *); 405 406 #endif /* __QDIO_H__ */ 407