1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright IBM Corp. 2000, 2008 4 * Author(s): Utz Bacher <utz.bacher@de.ibm.com> 5 * Jan Glauber <jang@linux.vnet.ibm.com> 6 * 7 */ 8 #ifndef __QDIO_H__ 9 #define __QDIO_H__ 10 11 #include <linux/interrupt.h> 12 #include <asm/cio.h> 13 #include <asm/ccwdev.h> 14 15 /* only use 4 queues to save some cachelines */ 16 #define QDIO_MAX_QUEUES_PER_IRQ 4 17 #define QDIO_MAX_BUFFERS_PER_Q 128 18 #define QDIO_MAX_BUFFERS_MASK (QDIO_MAX_BUFFERS_PER_Q - 1) 19 #define QDIO_BUFNR(num) ((num) & QDIO_MAX_BUFFERS_MASK) 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: absolute address of storage list information block 30 * @sla: absolute address of storage list 31 * @slsba: absolute address of storage list state block 32 * @akey: access key for SLIB 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 * @ac: adapter characteristics 55 * @iqdcnt: input queue descriptor count 56 * @oqdcnt: output queue descriptor count 57 * @iqdsz: input queue descriptor size 58 * @oqdsz: output queue descriptor size 59 * @qiba: absolute address of queue information block 60 * @qkey: queue information block key 61 * @qdf0: queue descriptions 62 */ 63 struct qdr { 64 u32 qfmt : 8; 65 u32 : 16; 66 u32 ac : 8; 67 u32 : 8; 68 u32 iqdcnt : 8; 69 u32 : 8; 70 u32 oqdcnt : 8; 71 u32 : 8; 72 u32 iqdsz : 8; 73 u32 : 8; 74 u32 oqdsz : 8; 75 /* private: */ 76 u32 res[9]; 77 /* public: */ 78 u64 qiba; 79 u32 : 32; 80 u32 qkey : 4; 81 u32 : 28; 82 struct qdesfmt0 qdf0[126]; 83 } __packed __aligned(PAGE_SIZE); 84 85 #define QIB_AC_OUTBOUND_PCI_SUPPORTED 0x40 86 #define QIB_RFLAGS_ENABLE_QEBSM 0x80 87 #define QIB_RFLAGS_ENABLE_DATA_DIV 0x02 88 89 /** 90 * struct qib - queue information block (QIB) 91 * @qfmt: queue format 92 * @pfmt: implementation dependent parameter format 93 * @rflags: QEBSM 94 * @ac: adapter characteristics 95 * @isliba: absolute address of first input SLIB 96 * @osliba: absolute address of first output SLIB 97 * @ebcnam: adapter identifier in EBCDIC 98 * @parm: implementation dependent parameters 99 */ 100 struct qib { 101 u32 qfmt : 8; 102 u32 pfmt : 8; 103 u32 rflags : 8; 104 u32 ac : 8; 105 u32 : 32; 106 u64 isliba; 107 u64 osliba; 108 u32 : 32; 109 u32 : 32; 110 u8 ebcnam[8]; 111 /* private: */ 112 u8 res[88]; 113 /* public: */ 114 u8 parm[128]; 115 } __attribute__ ((packed, aligned(256))); 116 117 /** 118 * struct slibe - storage list information block element (SLIBE) 119 * @parms: implementation dependent parameters 120 */ 121 struct slibe { 122 u64 parms; 123 }; 124 125 /** 126 * struct qaob - queue asynchronous operation block 127 * @res0: reserved parameters 128 * @res1: reserved parameter 129 * @res2: reserved parameter 130 * @res3: reserved parameter 131 * @aorc: asynchronous operation return code 132 * @flags: internal flags 133 * @cbtbs: control block type 134 * @sb_count: number of storage blocks 135 * @sba: storage block element addresses 136 * @dcount: size of storage block elements 137 * @user0: user defineable value 138 * @res4: reserved paramater 139 * @user1: user defineable value 140 * @user2: user defineable value 141 */ 142 struct qaob { 143 u64 res0[6]; 144 u8 res1; 145 u8 res2; 146 u8 res3; 147 u8 aorc; 148 u8 flags; 149 u16 cbtbs; 150 u8 sb_count; 151 u64 sba[QDIO_MAX_ELEMENTS_PER_BUFFER]; 152 u16 dcount[QDIO_MAX_ELEMENTS_PER_BUFFER]; 153 u64 user0; 154 u64 res4[2]; 155 u64 user1; 156 u64 user2; 157 } __attribute__ ((packed, aligned(256))); 158 159 /** 160 * struct slib - storage list information block (SLIB) 161 * @nsliba: next SLIB address (if any) 162 * @sla: SL address 163 * @slsba: SLSB address 164 * @slibe: SLIB elements 165 */ 166 struct slib { 167 u64 nsliba; 168 u64 sla; 169 u64 slsba; 170 /* private: */ 171 u8 res[1000]; 172 /* public: */ 173 struct slibe slibe[QDIO_MAX_BUFFERS_PER_Q]; 174 } __attribute__ ((packed, aligned(2048))); 175 176 #define SBAL_EFLAGS_LAST_ENTRY 0x40 177 #define SBAL_EFLAGS_CONTIGUOUS 0x20 178 #define SBAL_EFLAGS_FIRST_FRAG 0x04 179 #define SBAL_EFLAGS_MIDDLE_FRAG 0x08 180 #define SBAL_EFLAGS_LAST_FRAG 0x0c 181 #define SBAL_EFLAGS_MASK 0x6f 182 183 #define SBAL_SFLAGS0_PCI_REQ 0x40 184 #define SBAL_SFLAGS0_DATA_CONTINUATION 0x20 185 186 /* Awesome OpenFCP extensions */ 187 #define SBAL_SFLAGS0_TYPE_STATUS 0x00 188 #define SBAL_SFLAGS0_TYPE_WRITE 0x08 189 #define SBAL_SFLAGS0_TYPE_READ 0x10 190 #define SBAL_SFLAGS0_TYPE_WRITE_READ 0x18 191 #define SBAL_SFLAGS0_MORE_SBALS 0x04 192 #define SBAL_SFLAGS0_COMMAND 0x02 193 #define SBAL_SFLAGS0_LAST_SBAL 0x00 194 #define SBAL_SFLAGS0_ONLY_SBAL SBAL_SFLAGS0_COMMAND 195 #define SBAL_SFLAGS0_MIDDLE_SBAL SBAL_SFLAGS0_MORE_SBALS 196 #define SBAL_SFLAGS0_FIRST_SBAL (SBAL_SFLAGS0_MORE_SBALS | SBAL_SFLAGS0_COMMAND) 197 198 /** 199 * struct qdio_buffer_element - SBAL entry 200 * @eflags: SBAL entry flags 201 * @scount: SBAL count 202 * @sflags: whole SBAL flags 203 * @length: length 204 * @addr: absolute data address 205 */ 206 struct qdio_buffer_element { 207 u8 eflags; 208 /* private: */ 209 u8 res1; 210 /* public: */ 211 u8 scount; 212 u8 sflags; 213 u32 length; 214 u64 addr; 215 } __attribute__ ((packed, aligned(16))); 216 217 /** 218 * struct qdio_buffer - storage block address list (SBAL) 219 * @element: SBAL entries 220 */ 221 struct qdio_buffer { 222 struct qdio_buffer_element element[QDIO_MAX_ELEMENTS_PER_BUFFER]; 223 } __attribute__ ((packed, aligned(256))); 224 225 /** 226 * struct sl_element - storage list entry 227 * @sbal: absolute SBAL address 228 */ 229 struct sl_element { 230 u64 sbal; 231 } __attribute__ ((packed)); 232 233 /** 234 * struct sl - storage list (SL) 235 * @element: SL entries 236 */ 237 struct sl { 238 struct sl_element element[QDIO_MAX_BUFFERS_PER_Q]; 239 } __attribute__ ((packed, aligned(1024))); 240 241 /** 242 * struct slsb - storage list state block (SLSB) 243 * @val: state per buffer 244 */ 245 struct slsb { 246 u8 val[QDIO_MAX_BUFFERS_PER_Q]; 247 } __attribute__ ((packed, aligned(256))); 248 249 /** 250 * struct qdio_outbuf_state - SBAL related asynchronous operation information 251 * (for communication with upper layer programs) 252 * (only required for use with completion queues) 253 * @user: pointer to upper layer program's state information related to SBAL 254 * (stored in user1 data of QAOB) 255 */ 256 struct qdio_outbuf_state { 257 void *user; 258 }; 259 260 #define CHSC_AC1_INITIATE_INPUTQ 0x80 261 262 263 /* qdio adapter-characteristics-1 flag */ 264 #define AC1_SIGA_INPUT_NEEDED 0x40 /* process input queues */ 265 #define AC1_SIGA_OUTPUT_NEEDED 0x20 /* process output queues */ 266 #define AC1_SIGA_SYNC_NEEDED 0x10 /* ask hypervisor to sync */ 267 #define AC1_AUTOMATIC_SYNC_ON_THININT 0x08 /* set by hypervisor */ 268 #define AC1_AUTOMATIC_SYNC_ON_OUT_PCI 0x04 /* set by hypervisor */ 269 #define AC1_SC_QEBSM_AVAILABLE 0x02 /* available for subchannel */ 270 #define AC1_SC_QEBSM_ENABLED 0x01 /* enabled for subchannel */ 271 272 #define CHSC_AC2_MULTI_BUFFER_AVAILABLE 0x0080 273 #define CHSC_AC2_MULTI_BUFFER_ENABLED 0x0040 274 #define CHSC_AC2_DATA_DIV_AVAILABLE 0x0010 275 #define CHSC_AC2_SNIFFER_AVAILABLE 0x0008 276 #define CHSC_AC2_DATA_DIV_ENABLED 0x0002 277 278 #define CHSC_AC3_FORMAT2_CQ_AVAILABLE 0x8000 279 280 struct qdio_ssqd_desc { 281 u8 flags; 282 u8:8; 283 u16 sch; 284 u8 qfmt; 285 u8 parm; 286 u8 qdioac1; 287 u8 sch_class; 288 u8 pcnt; 289 u8 icnt; 290 u8:8; 291 u8 ocnt; 292 u8:8; 293 u8 mbccnt; 294 u16 qdioac2; 295 u64 sch_token; 296 u8 mro; 297 u8 mri; 298 u16 qdioac3; 299 u16:16; 300 u8:8; 301 u8 mmwc; 302 } __attribute__ ((packed)); 303 304 /* params are: ccw_device, qdio_error, queue_number, 305 first element processed, number of elements processed, int_parm */ 306 typedef void qdio_handler_t(struct ccw_device *, unsigned int, int, 307 int, int, unsigned long); 308 309 /* qdio errors reported to the upper-layer program */ 310 #define QDIO_ERROR_ACTIVATE 0x0001 311 #define QDIO_ERROR_GET_BUF_STATE 0x0002 312 #define QDIO_ERROR_SET_BUF_STATE 0x0004 313 #define QDIO_ERROR_SLSB_STATE 0x0100 314 #define QDIO_ERROR_SLSB_PENDING 0x0200 315 316 #define QDIO_ERROR_FATAL 0x00ff 317 #define QDIO_ERROR_TEMPORARY 0xff00 318 319 /* for qdio_cleanup */ 320 #define QDIO_FLAG_CLEANUP_USING_CLEAR 0x01 321 #define QDIO_FLAG_CLEANUP_USING_HALT 0x02 322 323 /** 324 * struct qdio_initialize - qdio initialization data 325 * @q_format: queue format 326 * @qdr_ac: feature flags to set 327 * @qib_param_field_format: format for qib_parm_field 328 * @qib_param_field: pointer to 128 bytes or NULL, if no param field 329 * @qib_rflags: rflags to set 330 * @input_slib_elements: pointer to no_input_qs * 128 words of data or NULL 331 * @output_slib_elements: pointer to no_output_qs * 128 words of data or NULL 332 * @no_input_qs: number of input queues 333 * @no_output_qs: number of output queues 334 * @input_handler: handler to be called for input queues 335 * @output_handler: handler to be called for output queues 336 * @irq_poll: Data IRQ polling handler 337 * @scan_threshold: # of in-use buffers that triggers scan on output queue 338 * @int_parm: interruption parameter 339 * @input_sbal_addr_array: per-queue array, each element points to 128 SBALs 340 * @output_sbal_addr_array: per-queue array, each element points to 128 SBALs 341 * @output_sbal_state_array: no_output_qs * 128 state info (for CQ or NULL) 342 */ 343 struct qdio_initialize { 344 unsigned char q_format; 345 unsigned char qdr_ac; 346 unsigned int qib_param_field_format; 347 unsigned char *qib_param_field; 348 unsigned char qib_rflags; 349 unsigned long *input_slib_elements; 350 unsigned long *output_slib_elements; 351 unsigned int no_input_qs; 352 unsigned int no_output_qs; 353 qdio_handler_t *input_handler; 354 qdio_handler_t *output_handler; 355 void (*irq_poll)(struct ccw_device *cdev, unsigned long data); 356 unsigned int scan_threshold; 357 unsigned long int_parm; 358 struct qdio_buffer ***input_sbal_addr_array; 359 struct qdio_buffer ***output_sbal_addr_array; 360 struct qdio_outbuf_state *output_sbal_state_array; 361 }; 362 363 #define QDIO_STATE_INACTIVE 0x00000002 /* after qdio_cleanup */ 364 #define QDIO_STATE_ESTABLISHED 0x00000004 /* after qdio_establish */ 365 #define QDIO_STATE_ACTIVE 0x00000008 /* after qdio_activate */ 366 #define QDIO_STATE_STOPPED 0x00000010 /* after queues went down */ 367 368 #define QDIO_FLAG_SYNC_INPUT 0x01 369 #define QDIO_FLAG_SYNC_OUTPUT 0x02 370 #define QDIO_FLAG_PCI_OUT 0x10 371 372 int qdio_alloc_buffers(struct qdio_buffer **buf, unsigned int count); 373 void qdio_free_buffers(struct qdio_buffer **buf, unsigned int count); 374 void qdio_reset_buffers(struct qdio_buffer **buf, unsigned int count); 375 376 extern int qdio_allocate(struct ccw_device *cdev, unsigned int no_input_qs, 377 unsigned int no_output_qs); 378 extern int qdio_establish(struct ccw_device *cdev, 379 struct qdio_initialize *init_data); 380 extern int qdio_activate(struct ccw_device *); 381 extern void qdio_release_aob(struct qaob *); 382 extern int do_QDIO(struct ccw_device *, unsigned int, int, unsigned int, 383 unsigned int); 384 extern int qdio_start_irq(struct ccw_device *cdev); 385 extern int qdio_stop_irq(struct ccw_device *cdev); 386 extern int qdio_get_next_buffers(struct ccw_device *, int, int *, int *); 387 extern int qdio_inspect_queue(struct ccw_device *cdev, unsigned int nr, 388 bool is_input, unsigned int *bufnr, 389 unsigned int *error); 390 extern int qdio_shutdown(struct ccw_device *, int); 391 extern int qdio_free(struct ccw_device *); 392 extern int qdio_get_ssqd_desc(struct ccw_device *, struct qdio_ssqd_desc *); 393 394 #endif /* __QDIO_H__ */ 395