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_MAX_ELEMENTS_PER_BUFFER 16 20 #define QDIO_SBAL_SIZE 256 21 22 #define QDIO_QETH_QFMT 0 23 #define QDIO_ZFCP_QFMT 1 24 #define QDIO_IQDIO_QFMT 2 25 26 /** 27 * struct qdesfmt0 - queue descriptor, format 0 28 * @sliba: storage list information block address 29 * @sla: storage list address 30 * @slsba: storage list state block address 31 * @akey: access key for SLIB 32 * @bkey: access key for SL 33 * @ckey: access key for SBALs 34 * @dkey: access key for SLSB 35 */ 36 struct qdesfmt0 { 37 u64 sliba; 38 u64 sla; 39 u64 slsba; 40 u32 : 32; 41 u32 akey : 4; 42 u32 bkey : 4; 43 u32 ckey : 4; 44 u32 dkey : 4; 45 u32 : 16; 46 } __attribute__ ((packed)); 47 48 #define QDR_AC_MULTI_BUFFER_ENABLE 0x01 49 50 /** 51 * struct qdr - queue description record (QDR) 52 * @qfmt: queue format 53 * @ac: adapter characteristics 54 * @iqdcnt: input queue descriptor count 55 * @oqdcnt: output queue descriptor count 56 * @iqdsz: input 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 61 */ 62 struct qdr { 63 u32 qfmt : 8; 64 u32 : 16; 65 u32 ac : 8; 66 u32 : 8; 67 u32 iqdcnt : 8; 68 u32 : 8; 69 u32 oqdcnt : 8; 70 u32 : 8; 71 u32 iqdsz : 8; 72 u32 : 8; 73 u32 oqdsz : 8; 74 /* private: */ 75 u32 res[9]; 76 /* public: */ 77 u64 qiba; 78 u32 : 32; 79 u32 qkey : 4; 80 u32 : 28; 81 struct qdesfmt0 qdf0[126]; 82 } __packed __aligned(PAGE_SIZE); 83 84 #define QIB_AC_OUTBOUND_PCI_SUPPORTED 0x40 85 #define QIB_RFLAGS_ENABLE_QEBSM 0x80 86 #define QIB_RFLAGS_ENABLE_DATA_DIV 0x02 87 88 /** 89 * struct qib - queue information block (QIB) 90 * @qfmt: queue format 91 * @pfmt: implementation dependent parameter format 92 * @rflags: QEBSM 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 98 */ 99 struct qib { 100 u32 qfmt : 8; 101 u32 pfmt : 8; 102 u32 rflags : 8; 103 u32 ac : 8; 104 u32 : 32; 105 u64 isliba; 106 u64 osliba; 107 u32 : 32; 108 u32 : 32; 109 u8 ebcnam[8]; 110 /* private: */ 111 u8 res[88]; 112 /* public: */ 113 u8 parm[QDIO_MAX_BUFFERS_PER_Q]; 114 } __attribute__ ((packed, aligned(256))); 115 116 /** 117 * struct slibe - storage list information block element (SLIBE) 118 * @parms: implementation dependent parameters 119 */ 120 struct slibe { 121 u64 parms; 122 }; 123 124 /** 125 * struct qaob - queue asynchronous operation block 126 * @res0: reserved parameters 127 * @res1: reserved parameter 128 * @res2: reserved parameter 129 * @res3: reserved parameter 130 * @aorc: asynchronous operation return code 131 * @flags: internal flags 132 * @cbtbs: control block type 133 * @sb_count: number of storage blocks 134 * @sba: storage block element addresses 135 * @dcount: size of storage block elements 136 * @user0: user defineable value 137 * @res4: reserved paramater 138 * @user1: user defineable value 139 * @user2: user defineable value 140 */ 141 struct qaob { 142 u64 res0[6]; 143 u8 res1; 144 u8 res2; 145 u8 res3; 146 u8 aorc; 147 u8 flags; 148 u16 cbtbs; 149 u8 sb_count; 150 u64 sba[QDIO_MAX_ELEMENTS_PER_BUFFER]; 151 u16 dcount[QDIO_MAX_ELEMENTS_PER_BUFFER]; 152 u64 user0; 153 u64 res4[2]; 154 u64 user1; 155 u64 user2; 156 } __attribute__ ((packed, aligned(256))); 157 158 /** 159 * struct slib - storage list information block (SLIB) 160 * @nsliba: next SLIB address (if any) 161 * @sla: SL address 162 * @slsba: SLSB address 163 * @slibe: SLIB elements 164 */ 165 struct slib { 166 u64 nsliba; 167 u64 sla; 168 u64 slsba; 169 /* private: */ 170 u8 res[1000]; 171 /* public: */ 172 struct slibe slibe[QDIO_MAX_BUFFERS_PER_Q]; 173 } __attribute__ ((packed, aligned(2048))); 174 175 #define SBAL_EFLAGS_LAST_ENTRY 0x40 176 #define SBAL_EFLAGS_CONTIGUOUS 0x20 177 #define SBAL_EFLAGS_FIRST_FRAG 0x04 178 #define SBAL_EFLAGS_MIDDLE_FRAG 0x08 179 #define SBAL_EFLAGS_LAST_FRAG 0x0c 180 #define SBAL_EFLAGS_MASK 0x6f 181 182 #define SBAL_SFLAGS0_PCI_REQ 0x40 183 #define SBAL_SFLAGS0_DATA_CONTINUATION 0x20 184 185 /* Awesome OpenFCP extensions */ 186 #define SBAL_SFLAGS0_TYPE_STATUS 0x00 187 #define SBAL_SFLAGS0_TYPE_WRITE 0x08 188 #define SBAL_SFLAGS0_TYPE_READ 0x10 189 #define SBAL_SFLAGS0_TYPE_WRITE_READ 0x18 190 #define SBAL_SFLAGS0_MORE_SBALS 0x04 191 #define SBAL_SFLAGS0_COMMAND 0x02 192 #define SBAL_SFLAGS0_LAST_SBAL 0x00 193 #define SBAL_SFLAGS0_ONLY_SBAL SBAL_SFLAGS0_COMMAND 194 #define SBAL_SFLAGS0_MIDDLE_SBAL SBAL_SFLAGS0_MORE_SBALS 195 #define SBAL_SFLAGS0_FIRST_SBAL (SBAL_SFLAGS0_MORE_SBALS | SBAL_SFLAGS0_COMMAND) 196 197 /** 198 * struct qdio_buffer_element - SBAL entry 199 * @eflags: SBAL entry flags 200 * @scount: SBAL count 201 * @sflags: whole SBAL flags 202 * @length: length 203 * @addr: address 204 */ 205 struct qdio_buffer_element { 206 u8 eflags; 207 /* private: */ 208 u8 res1; 209 /* public: */ 210 u8 scount; 211 u8 sflags; 212 u32 length; 213 void *addr; 214 } __attribute__ ((packed, aligned(16))); 215 216 /** 217 * struct qdio_buffer - storage block address list (SBAL) 218 * @element: SBAL entries 219 */ 220 struct qdio_buffer { 221 struct qdio_buffer_element element[QDIO_MAX_ELEMENTS_PER_BUFFER]; 222 } __attribute__ ((packed, aligned(256))); 223 224 /** 225 * struct sl_element - storage list entry 226 * @sbal: absolute SBAL address 227 */ 228 struct sl_element { 229 unsigned long sbal; 230 } __attribute__ ((packed)); 231 232 /** 233 * struct sl - storage list (SL) 234 * @element: SL entries 235 */ 236 struct sl { 237 struct sl_element element[QDIO_MAX_BUFFERS_PER_Q]; 238 } __attribute__ ((packed, aligned(1024))); 239 240 /** 241 * struct slsb - storage list state block (SLSB) 242 * @val: state per buffer 243 */ 244 struct slsb { 245 u8 val[QDIO_MAX_BUFFERS_PER_Q]; 246 } __attribute__ ((packed, aligned(256))); 247 248 /** 249 * struct qdio_outbuf_state - SBAL related asynchronous operation information 250 * (for communication with upper layer programs) 251 * (only required for use with completion queues) 252 * @flags: flags indicating state of buffer 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 u8 flags; 258 void *user; 259 }; 260 261 #define QDIO_OUTBUF_STATE_FLAG_PENDING 0x01 262 263 #define CHSC_AC1_INITIATE_INPUTQ 0x80 264 265 266 /* qdio adapter-characteristics-1 flag */ 267 #define AC1_SIGA_INPUT_NEEDED 0x40 /* process input queues */ 268 #define AC1_SIGA_OUTPUT_NEEDED 0x20 /* process output queues */ 269 #define AC1_SIGA_SYNC_NEEDED 0x10 /* ask hypervisor to sync */ 270 #define AC1_AUTOMATIC_SYNC_ON_THININT 0x08 /* set by hypervisor */ 271 #define AC1_AUTOMATIC_SYNC_ON_OUT_PCI 0x04 /* set by hypervisor */ 272 #define AC1_SC_QEBSM_AVAILABLE 0x02 /* available for subchannel */ 273 #define AC1_SC_QEBSM_ENABLED 0x01 /* enabled for subchannel */ 274 275 #define CHSC_AC2_MULTI_BUFFER_AVAILABLE 0x0080 276 #define CHSC_AC2_MULTI_BUFFER_ENABLED 0x0040 277 #define CHSC_AC2_DATA_DIV_AVAILABLE 0x0010 278 #define CHSC_AC2_DATA_DIV_ENABLED 0x0002 279 280 #define CHSC_AC3_FORMAT2_CQ_AVAILABLE 0x8000 281 282 struct qdio_ssqd_desc { 283 u8 flags; 284 u8:8; 285 u16 sch; 286 u8 qfmt; 287 u8 parm; 288 u8 qdioac1; 289 u8 sch_class; 290 u8 pcnt; 291 u8 icnt; 292 u8:8; 293 u8 ocnt; 294 u8:8; 295 u8 mbccnt; 296 u16 qdioac2; 297 u64 sch_token; 298 u8 mro; 299 u8 mri; 300 u16 qdioac3; 301 u16:16; 302 u8:8; 303 u8 mmwc; 304 } __attribute__ ((packed)); 305 306 /* params are: ccw_device, qdio_error, queue_number, 307 first element processed, number of elements processed, int_parm */ 308 typedef void qdio_handler_t(struct ccw_device *, unsigned int, int, 309 int, int, unsigned long); 310 311 /* qdio errors reported to the upper-layer program */ 312 #define QDIO_ERROR_ACTIVATE 0x0001 313 #define QDIO_ERROR_GET_BUF_STATE 0x0002 314 #define QDIO_ERROR_SET_BUF_STATE 0x0004 315 #define QDIO_ERROR_SLSB_STATE 0x0100 316 317 #define QDIO_ERROR_FATAL 0x00ff 318 #define QDIO_ERROR_TEMPORARY 0xff00 319 320 /* for qdio_cleanup */ 321 #define QDIO_FLAG_CLEANUP_USING_CLEAR 0x01 322 #define QDIO_FLAG_CLEANUP_USING_HALT 0x02 323 324 /** 325 * struct qdio_initialize - qdio initialization data 326 * @cdev: associated ccw device 327 * @q_format: queue format 328 * @qdr_ac: feature flags to set 329 * @adapter_name: name for the adapter 330 * @qib_param_field_format: format for qib_parm_field 331 * @qib_param_field: pointer to 128 bytes or NULL, if no param field 332 * @qib_rflags: rflags to set 333 * @input_slib_elements: pointer to no_input_qs * 128 words of data or NULL 334 * @output_slib_elements: pointer to no_output_qs * 128 words of data or NULL 335 * @no_input_qs: number of input queues 336 * @no_output_qs: number of output queues 337 * @input_handler: handler to be called for input queues 338 * @output_handler: handler to be called for output queues 339 * @queue_start_poll_array: polling handlers (one per input queue or NULL) 340 * @scan_threshold: # of in-use buffers that triggers scan on output queue 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 344 * @output_sbal_state_array: no_output_qs * 128 state info (for CQ or NULL) 345 */ 346 struct qdio_initialize { 347 struct ccw_device *cdev; 348 unsigned char q_format; 349 unsigned char qdr_ac; 350 unsigned char adapter_name[8]; 351 unsigned int qib_param_field_format; 352 unsigned char *qib_param_field; 353 unsigned char qib_rflags; 354 unsigned long *input_slib_elements; 355 unsigned long *output_slib_elements; 356 unsigned int no_input_qs; 357 unsigned int no_output_qs; 358 qdio_handler_t *input_handler; 359 qdio_handler_t *output_handler; 360 void (**queue_start_poll_array) (struct ccw_device *, int, 361 unsigned long); 362 int scan_threshold; 363 unsigned long int_parm; 364 struct qdio_buffer **input_sbal_addr_array; 365 struct qdio_buffer **output_sbal_addr_array; 366 struct qdio_outbuf_state *output_sbal_state_array; 367 }; 368 369 /** 370 * enum qdio_brinfo_entry_type - type of address entry for qdio_brinfo_desc() 371 * @l3_ipv6_addr: entry contains IPv6 address 372 * @l3_ipv4_addr: entry contains IPv4 address 373 * @l2_addr_lnid: entry contains MAC address and VLAN ID 374 */ 375 enum qdio_brinfo_entry_type {l3_ipv6_addr, l3_ipv4_addr, l2_addr_lnid}; 376 377 /** 378 * struct qdio_brinfo_entry_XXX - Address entry for qdio_brinfo_desc() 379 * @nit: Network interface token 380 * @addr: Address of one of the three types 381 * 382 * The struct is passed to the callback function by qdio_brinfo_desc() 383 */ 384 struct qdio_brinfo_entry_l3_ipv6 { 385 u64 nit; 386 struct { unsigned char _s6_addr[16]; } addr; 387 } __packed; 388 struct qdio_brinfo_entry_l3_ipv4 { 389 u64 nit; 390 struct { uint32_t _s_addr; } addr; 391 } __packed; 392 struct qdio_brinfo_entry_l2 { 393 u64 nit; 394 struct { u8 mac[6]; u16 lnid; } addr_lnid; 395 } __packed; 396 397 #define QDIO_STATE_INACTIVE 0x00000002 /* after qdio_cleanup */ 398 #define QDIO_STATE_ESTABLISHED 0x00000004 /* after qdio_establish */ 399 #define QDIO_STATE_ACTIVE 0x00000008 /* after qdio_activate */ 400 #define QDIO_STATE_STOPPED 0x00000010 /* after queues went down */ 401 402 #define QDIO_FLAG_SYNC_INPUT 0x01 403 #define QDIO_FLAG_SYNC_OUTPUT 0x02 404 #define QDIO_FLAG_PCI_OUT 0x10 405 406 int qdio_alloc_buffers(struct qdio_buffer **buf, unsigned int count); 407 void qdio_free_buffers(struct qdio_buffer **buf, unsigned int count); 408 void qdio_reset_buffers(struct qdio_buffer **buf, unsigned int count); 409 410 extern int qdio_allocate(struct qdio_initialize *); 411 extern int qdio_establish(struct qdio_initialize *); 412 extern int qdio_activate(struct ccw_device *); 413 extern void qdio_release_aob(struct qaob *); 414 extern int do_QDIO(struct ccw_device *, unsigned int, int, unsigned int, 415 unsigned int); 416 extern int qdio_start_irq(struct ccw_device *, int); 417 extern int qdio_stop_irq(struct ccw_device *, int); 418 extern int qdio_get_next_buffers(struct ccw_device *, int, int *, int *); 419 extern int qdio_shutdown(struct ccw_device *, int); 420 extern int qdio_free(struct ccw_device *); 421 extern int qdio_get_ssqd_desc(struct ccw_device *, struct qdio_ssqd_desc *); 422 extern int qdio_pnso_brinfo(struct subchannel_id schid, 423 int cnc, u16 *response, 424 void (*cb)(void *priv, enum qdio_brinfo_entry_type type, 425 void *entry), 426 void *priv); 427 428 #endif /* __QDIO_H__ */ 429