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: storage list information block address 30 * @sla: storage list address 31 * @slsba: storage list state block address 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: queue information block address 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: 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 void *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 unsigned long 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 * @flags: flags indicating state of buffer 254 * @user: pointer to upper layer program's state information related to SBAL 255 * (stored in user1 data of QAOB) 256 */ 257 struct qdio_outbuf_state { 258 u8 flags; 259 void *user; 260 }; 261 262 #define QDIO_OUTBUF_STATE_FLAG_PENDING 0x01 263 264 #define CHSC_AC1_INITIATE_INPUTQ 0x80 265 266 267 /* qdio adapter-characteristics-1 flag */ 268 #define AC1_SIGA_INPUT_NEEDED 0x40 /* process input queues */ 269 #define AC1_SIGA_OUTPUT_NEEDED 0x20 /* process output queues */ 270 #define AC1_SIGA_SYNC_NEEDED 0x10 /* ask hypervisor to sync */ 271 #define AC1_AUTOMATIC_SYNC_ON_THININT 0x08 /* set by hypervisor */ 272 #define AC1_AUTOMATIC_SYNC_ON_OUT_PCI 0x04 /* set by hypervisor */ 273 #define AC1_SC_QEBSM_AVAILABLE 0x02 /* available for subchannel */ 274 #define AC1_SC_QEBSM_ENABLED 0x01 /* enabled for subchannel */ 275 276 #define CHSC_AC2_MULTI_BUFFER_AVAILABLE 0x0080 277 #define CHSC_AC2_MULTI_BUFFER_ENABLED 0x0040 278 #define CHSC_AC2_DATA_DIV_AVAILABLE 0x0010 279 #define CHSC_AC2_DATA_DIV_ENABLED 0x0002 280 281 #define CHSC_AC3_FORMAT2_CQ_AVAILABLE 0x8000 282 283 struct qdio_ssqd_desc { 284 u8 flags; 285 u8:8; 286 u16 sch; 287 u8 qfmt; 288 u8 parm; 289 u8 qdioac1; 290 u8 sch_class; 291 u8 pcnt; 292 u8 icnt; 293 u8:8; 294 u8 ocnt; 295 u8:8; 296 u8 mbccnt; 297 u16 qdioac2; 298 u64 sch_token; 299 u8 mro; 300 u8 mri; 301 u16 qdioac3; 302 u16:16; 303 u8:8; 304 u8 mmwc; 305 } __attribute__ ((packed)); 306 307 /* params are: ccw_device, qdio_error, queue_number, 308 first element processed, number of elements processed, int_parm */ 309 typedef void qdio_handler_t(struct ccw_device *, unsigned int, int, 310 int, int, unsigned long); 311 312 /* qdio errors reported to the upper-layer program */ 313 #define QDIO_ERROR_ACTIVATE 0x0001 314 #define QDIO_ERROR_GET_BUF_STATE 0x0002 315 #define QDIO_ERROR_SET_BUF_STATE 0x0004 316 #define QDIO_ERROR_SLSB_STATE 0x0100 317 318 #define QDIO_ERROR_FATAL 0x00ff 319 #define QDIO_ERROR_TEMPORARY 0xff00 320 321 /* for qdio_cleanup */ 322 #define QDIO_FLAG_CLEANUP_USING_CLEAR 0x01 323 #define QDIO_FLAG_CLEANUP_USING_HALT 0x02 324 325 /** 326 * struct qdio_initialize - qdio initialization data 327 * @cdev: associated ccw device 328 * @q_format: queue format 329 * @qdr_ac: feature flags to set 330 * @adapter_name: name for the adapter 331 * @qib_param_field_format: format for qib_parm_field 332 * @qib_param_field: pointer to 128 bytes or NULL, if no param field 333 * @qib_rflags: rflags to set 334 * @input_slib_elements: pointer to no_input_qs * 128 words of data or NULL 335 * @output_slib_elements: pointer to no_output_qs * 128 words of data or NULL 336 * @no_input_qs: number of input queues 337 * @no_output_qs: number of output queues 338 * @input_handler: handler to be called for input queues 339 * @output_handler: handler to be called for output queues 340 * @queue_start_poll_array: polling handlers (one per input queue or NULL) 341 * @scan_threshold: # of in-use buffers that triggers scan on output queue 342 * @int_parm: interruption parameter 343 * @input_sbal_addr_array: address of no_input_qs * 128 pointers 344 * @output_sbal_addr_array: address of no_output_qs * 128 pointers 345 * @output_sbal_state_array: no_output_qs * 128 state info (for CQ or NULL) 346 */ 347 struct qdio_initialize { 348 struct ccw_device *cdev; 349 unsigned char q_format; 350 unsigned char qdr_ac; 351 unsigned char adapter_name[8]; 352 unsigned int qib_param_field_format; 353 unsigned char *qib_param_field; 354 unsigned char qib_rflags; 355 unsigned long *input_slib_elements; 356 unsigned long *output_slib_elements; 357 unsigned int no_input_qs; 358 unsigned int no_output_qs; 359 qdio_handler_t *input_handler; 360 qdio_handler_t *output_handler; 361 void (**queue_start_poll_array) (struct ccw_device *, int, 362 unsigned long); 363 unsigned int scan_threshold; 364 unsigned long int_parm; 365 struct qdio_buffer **input_sbal_addr_array; 366 struct qdio_buffer **output_sbal_addr_array; 367 struct qdio_outbuf_state *output_sbal_state_array; 368 }; 369 370 /** 371 * enum qdio_brinfo_entry_type - type of address entry for qdio_brinfo_desc() 372 * @l3_ipv6_addr: entry contains IPv6 address 373 * @l3_ipv4_addr: entry contains IPv4 address 374 * @l2_addr_lnid: entry contains MAC address and VLAN ID 375 */ 376 enum qdio_brinfo_entry_type {l3_ipv6_addr, l3_ipv4_addr, l2_addr_lnid}; 377 378 /** 379 * struct qdio_brinfo_entry_XXX - Address entry for qdio_brinfo_desc() 380 * @nit: Network interface token 381 * @addr: Address of one of the three types 382 * 383 * The struct is passed to the callback function by qdio_brinfo_desc() 384 */ 385 struct qdio_brinfo_entry_l3_ipv6 { 386 u64 nit; 387 struct { unsigned char _s6_addr[16]; } addr; 388 } __packed; 389 struct qdio_brinfo_entry_l3_ipv4 { 390 u64 nit; 391 struct { uint32_t _s_addr; } addr; 392 } __packed; 393 struct qdio_brinfo_entry_l2 { 394 u64 nit; 395 struct { u8 mac[6]; u16 lnid; } addr_lnid; 396 } __packed; 397 398 #define QDIO_STATE_INACTIVE 0x00000002 /* after qdio_cleanup */ 399 #define QDIO_STATE_ESTABLISHED 0x00000004 /* after qdio_establish */ 400 #define QDIO_STATE_ACTIVE 0x00000008 /* after qdio_activate */ 401 #define QDIO_STATE_STOPPED 0x00000010 /* after queues went down */ 402 403 #define QDIO_FLAG_SYNC_INPUT 0x01 404 #define QDIO_FLAG_SYNC_OUTPUT 0x02 405 #define QDIO_FLAG_PCI_OUT 0x10 406 407 int qdio_alloc_buffers(struct qdio_buffer **buf, unsigned int count); 408 void qdio_free_buffers(struct qdio_buffer **buf, unsigned int count); 409 void qdio_reset_buffers(struct qdio_buffer **buf, unsigned int count); 410 411 extern int qdio_allocate(struct qdio_initialize *); 412 extern int qdio_establish(struct qdio_initialize *); 413 extern int qdio_activate(struct ccw_device *); 414 extern void qdio_release_aob(struct qaob *); 415 extern int do_QDIO(struct ccw_device *, unsigned int, int, unsigned int, 416 unsigned int); 417 extern int qdio_start_irq(struct ccw_device *, int); 418 extern int qdio_stop_irq(struct ccw_device *, int); 419 extern int qdio_get_next_buffers(struct ccw_device *, int, int *, int *); 420 extern int qdio_inspect_queue(struct ccw_device *cdev, unsigned int nr, 421 bool is_input, unsigned int *bufnr, 422 unsigned int *error); 423 extern int qdio_shutdown(struct ccw_device *, int); 424 extern int qdio_free(struct ccw_device *); 425 extern int qdio_get_ssqd_desc(struct ccw_device *, struct qdio_ssqd_desc *); 426 extern int qdio_pnso_brinfo(struct subchannel_id schid, 427 int cnc, u16 *response, 428 void (*cb)(void *priv, enum qdio_brinfo_entry_type type, 429 void *entry), 430 void *priv); 431 432 #endif /* __QDIO_H__ */ 433