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1/* SPDX-License-Identifier: GPL-2.0 */2/*3 * Copyright IBM Corp. 2000, 20094 * Author(s): Utz Bacher <utz.bacher@de.ibm.com>5 * Jan Glauber <jang@linux.vnet.ibm.com>6 */7#ifndef _CIO_QDIO_H8#define _CIO_QDIO_H9 10#include <asm/page.h>11#include <asm/schid.h>12#include <asm/debug.h>13#include "chsc.h"14 15#define QDIO_BUSY_BIT_PATIENCE (100 << 12) /* 100 microseconds */16#define QDIO_BUSY_BIT_RETRY_DELAY 10 /* 10 milliseconds */17#define QDIO_BUSY_BIT_RETRIES 1000 /* = 10s retry time */18 19enum qdio_irq_states {20 QDIO_IRQ_STATE_INACTIVE,21 QDIO_IRQ_STATE_ESTABLISHED,22 QDIO_IRQ_STATE_ACTIVE,23 QDIO_IRQ_STATE_STOPPED,24 QDIO_IRQ_STATE_CLEANUP,25 QDIO_IRQ_STATE_ERR,26 NR_QDIO_IRQ_STATES,27};28 29/* used as intparm in do_IO */30#define QDIO_DOING_ESTABLISH 131#define QDIO_DOING_ACTIVATE 232#define QDIO_DOING_CLEANUP 333 34#define SLSB_STATE_NOT_INIT 0x035#define SLSB_STATE_EMPTY 0x136#define SLSB_STATE_PRIMED 0x237#define SLSB_STATE_PENDING 0x338#define SLSB_STATE_HALTED 0xe39#define SLSB_STATE_ERROR 0xf40#define SLSB_TYPE_INPUT 0x041#define SLSB_TYPE_OUTPUT 0x2042#define SLSB_OWNER_PROG 0x8043#define SLSB_OWNER_CU 0x4044 45#define SLSB_P_INPUT_NOT_INIT \46 (SLSB_OWNER_PROG | SLSB_TYPE_INPUT | SLSB_STATE_NOT_INIT) /* 0x80 */47#define SLSB_P_INPUT_ACK \48 (SLSB_OWNER_PROG | SLSB_TYPE_INPUT | SLSB_STATE_EMPTY) /* 0x81 */49#define SLSB_CU_INPUT_EMPTY \50 (SLSB_OWNER_CU | SLSB_TYPE_INPUT | SLSB_STATE_EMPTY) /* 0x41 */51#define SLSB_P_INPUT_PRIMED \52 (SLSB_OWNER_PROG | SLSB_TYPE_INPUT | SLSB_STATE_PRIMED) /* 0x82 */53#define SLSB_P_INPUT_HALTED \54 (SLSB_OWNER_PROG | SLSB_TYPE_INPUT | SLSB_STATE_HALTED) /* 0x8e */55#define SLSB_P_INPUT_ERROR \56 (SLSB_OWNER_PROG | SLSB_TYPE_INPUT | SLSB_STATE_ERROR) /* 0x8f */57#define SLSB_P_OUTPUT_NOT_INIT \58 (SLSB_OWNER_PROG | SLSB_TYPE_OUTPUT | SLSB_STATE_NOT_INIT) /* 0xa0 */59#define SLSB_P_OUTPUT_EMPTY \60 (SLSB_OWNER_PROG | SLSB_TYPE_OUTPUT | SLSB_STATE_EMPTY) /* 0xa1 */61#define SLSB_P_OUTPUT_PENDING \62 (SLSB_OWNER_PROG | SLSB_TYPE_OUTPUT | SLSB_STATE_PENDING) /* 0xa3 */63#define SLSB_CU_OUTPUT_PRIMED \64 (SLSB_OWNER_CU | SLSB_TYPE_OUTPUT | SLSB_STATE_PRIMED) /* 0x62 */65#define SLSB_P_OUTPUT_HALTED \66 (SLSB_OWNER_PROG | SLSB_TYPE_OUTPUT | SLSB_STATE_HALTED) /* 0xae */67#define SLSB_P_OUTPUT_ERROR \68 (SLSB_OWNER_PROG | SLSB_TYPE_OUTPUT | SLSB_STATE_ERROR) /* 0xaf */69 70#define SLSB_ERROR_DURING_LOOKUP 0xff71 72/* additional CIWs returned by extended Sense-ID */73#define CIW_TYPE_EQUEUE 0x3 /* establish QDIO queues */74#define CIW_TYPE_AQUEUE 0x4 /* activate QDIO queues */75 76/* flags for st qdio sch data */77#define CHSC_FLAG_QDIO_CAPABILITY 0x8078#define CHSC_FLAG_VALIDITY 0x4079 80/* SIGA flags */81#define QDIO_SIGA_WRITE 0x0082#define QDIO_SIGA_READ 0x0183#define QDIO_SIGA_SYNC 0x0284#define QDIO_SIGA_WRITEM 0x0385#define QDIO_SIGA_WRITEQ 0x0486#define QDIO_SIGA_QEBSM_FLAG 0x8087 88static inline int do_sqbs(u64 token, unsigned char state, int queue,89 int *start, int *count)90{91 unsigned long _queuestart = ((unsigned long)queue << 32) | *start;92 unsigned long _ccq = *count;93 94 asm volatile(95 " lgr 1,%[token]\n"96 " .insn rsy,0xeb000000008a,%[qs],%[ccq],0(%[state])"97 : [ccq] "+&d" (_ccq), [qs] "+&d" (_queuestart)98 : [state] "a" ((unsigned long)state), [token] "d" (token)99 : "memory", "cc", "1");100 *count = _ccq & 0xff;101 *start = _queuestart & 0xff;102 103 return (_ccq >> 32) & 0xff;104}105 106static inline int do_eqbs(u64 token, unsigned char *state, int queue,107 int *start, int *count, int ack)108{109 unsigned long _queuestart = ((unsigned long)queue << 32) | *start;110 unsigned long _state = (unsigned long)ack << 63;111 unsigned long _ccq = *count;112 113 asm volatile(114 " lgr 1,%[token]\n"115 " .insn rrf,0xb99c0000,%[qs],%[state],%[ccq],0"116 : [ccq] "+&d" (_ccq), [qs] "+&d" (_queuestart),117 [state] "+&d" (_state)118 : [token] "d" (token)119 : "memory", "cc", "1");120 *count = _ccq & 0xff;121 *start = _queuestart & 0xff;122 *state = _state & 0xff;123 124 return (_ccq >> 32) & 0xff;125}126 127struct qdio_irq;128 129struct qdio_dev_perf_stat {130 unsigned int adapter_int;131 unsigned int qdio_int;132 133 unsigned int siga_read;134 unsigned int siga_write;135 unsigned int siga_sync;136 137 unsigned int inbound_call;138 unsigned int stop_polling;139 unsigned int inbound_queue_full;140 unsigned int outbound_call;141 unsigned int outbound_queue_full;142 unsigned int fast_requeue;143 unsigned int target_full;144 unsigned int eqbs;145 unsigned int eqbs_partial;146 unsigned int sqbs;147 unsigned int sqbs_partial;148 unsigned int int_discarded;149} ____cacheline_aligned;150 151struct qdio_queue_perf_stat {152 /* Sorted into order-2 buckets: 1, 2-3, 4-7, ... 64-127, 128. */153 unsigned int nr_sbals[8];154 unsigned int nr_sbal_error;155 unsigned int nr_sbal_nop;156 unsigned int nr_sbal_total;157};158 159enum qdio_irq_poll_states {160 QDIO_IRQ_DISABLED,161};162 163struct qdio_input_q {164 /* Batch of SBALs that we processed while polling the queue: */165 unsigned int batch_start;166 unsigned int batch_count;167};168 169struct qdio_output_q {170};171 172/*173 * Note on cache alignment: grouped slsb and write mostly data at the beginning174 * sbal[] is read-only and starts on a new cacheline followed by read mostly.175 */176struct qdio_q {177 struct slsb slsb;178 179 union {180 struct qdio_input_q in;181 struct qdio_output_q out;182 } u;183 184 /*185 * inbound: next buffer the program should check for186 * outbound: next buffer to check if adapter processed it187 */188 int first_to_check;189 190 /* number of buffers in use by the adapter */191 atomic_t nr_buf_used;192 193 /* last scan of the queue */194 u64 timestamp;195 196 struct qdio_queue_perf_stat q_stats;197 198 struct qdio_buffer *sbal[QDIO_MAX_BUFFERS_PER_Q] ____cacheline_aligned;199 200 /* queue number */201 int nr;202 203 /* bitmask of queue number */204 int mask;205 206 /* input or output queue */207 int is_input_q;208 209 /* upper-layer program handler */210 qdio_handler_t (*handler);211 212 struct qdio_irq *irq_ptr;213 struct sl *sl;214 /*215 * A page is allocated under this pointer and used for slib and sl.216 * slib is 2048 bytes big and sl points to offset PAGE_SIZE / 2.217 */218 struct slib *slib;219} __attribute__ ((aligned(256)));220 221struct qdio_irq {222 struct qib qib;223 u32 *dsci; /* address of device state change indicator */224 struct ccw_device *cdev;225 struct list_head entry; /* list of thinint devices */226 struct dentry *debugfs_dev;227 u64 last_data_irq_time;228 229 unsigned long int_parm;230 struct subchannel_id schid;231 unsigned long sch_token; /* QEBSM facility */232 233 enum qdio_irq_states state;234 u8 qdioac1;235 236 int nr_input_qs;237 int nr_output_qs;238 239 struct ccw1 *ccw;240 241 struct qdio_ssqd_desc ssqd_desc;242 void (*orig_handler) (struct ccw_device *, unsigned long, struct irb *);243 qdio_handler_t (*error_handler);244 245 int perf_stat_enabled;246 247 struct qdr *qdr;248 unsigned long chsc_page;249 250 struct qdio_q *input_qs[QDIO_MAX_QUEUES_PER_IRQ];251 struct qdio_q *output_qs[QDIO_MAX_QUEUES_PER_IRQ];252 unsigned int max_input_qs;253 unsigned int max_output_qs;254 255 void (*irq_poll)(struct ccw_device *cdev, unsigned long data);256 unsigned long poll_state;257 258 debug_info_t *debug_area;259 struct mutex setup_mutex;260 struct qdio_dev_perf_stat perf_stat;261};262 263/* helper functions */264#define queue_type(q) q->irq_ptr->qib.qfmt265#define SCH_NO(q) (q->irq_ptr->schid.sch_no)266 267#define is_thinint_irq(irq) \268 (irq->qib.qfmt == QDIO_IQDIO_QFMT || \269 css_general_characteristics.aif_osa)270 271#define qperf(__qdev, __attr) ((__qdev)->perf_stat.(__attr))272 273#define QDIO_PERF_STAT_INC(__irq, __attr) \274({ \275 struct qdio_irq *qdev = __irq; \276 if (qdev->perf_stat_enabled) \277 (qdev->perf_stat.__attr)++; \278})279 280#define qperf_inc(__q, __attr) QDIO_PERF_STAT_INC((__q)->irq_ptr, __attr)281 282static inline void account_sbals_error(struct qdio_q *q, int count)283{284 q->q_stats.nr_sbal_error += count;285 q->q_stats.nr_sbal_total += count;286}287 288/* the highest iqdio queue is used for multicast */289static inline int multicast_outbound(struct qdio_q *q)290{291 return (q->irq_ptr->nr_output_qs > 1) &&292 (q->nr == q->irq_ptr->nr_output_qs - 1);293}294 295static inline void qdio_deliver_irq(struct qdio_irq *irq)296{297 if (!test_and_set_bit(QDIO_IRQ_DISABLED, &irq->poll_state))298 irq->irq_poll(irq->cdev, irq->int_parm);299 else300 QDIO_PERF_STAT_INC(irq, int_discarded);301}302 303#define pci_out_supported(irq) ((irq)->qib.ac & QIB_AC_OUTBOUND_PCI_SUPPORTED)304#define is_qebsm(q) (q->irq_ptr->sch_token != 0)305 306#define qdio_need_siga_in(irq) ((irq)->qdioac1 & AC1_SIGA_INPUT_NEEDED)307#define qdio_need_siga_out(irq) ((irq)->qdioac1 & AC1_SIGA_OUTPUT_NEEDED)308#define qdio_need_siga_sync(irq) (unlikely((irq)->qdioac1 & AC1_SIGA_SYNC_NEEDED))309 310#define for_each_input_queue(irq_ptr, q, i) \311 for (i = 0; i < irq_ptr->nr_input_qs && \312 ({ q = irq_ptr->input_qs[i]; 1; }); i++)313#define for_each_output_queue(irq_ptr, q, i) \314 for (i = 0; i < irq_ptr->nr_output_qs && \315 ({ q = irq_ptr->output_qs[i]; 1; }); i++)316 317#define add_buf(bufnr, inc) QDIO_BUFNR((bufnr) + (inc))318#define next_buf(bufnr) add_buf(bufnr, 1)319#define sub_buf(bufnr, dec) QDIO_BUFNR((bufnr) - (dec))320#define prev_buf(bufnr) sub_buf(bufnr, 1)321 322extern u64 last_ai_time;323 324/* prototypes for thin interrupt */325int qdio_establish_thinint(struct qdio_irq *irq_ptr);326void qdio_shutdown_thinint(struct qdio_irq *irq_ptr);327int qdio_thinint_init(void);328void qdio_thinint_exit(void);329int test_nonshared_ind(struct qdio_irq *);330 331/* prototypes for setup */332void qdio_int_handler(struct ccw_device *cdev, unsigned long intparm,333 struct irb *irb);334int qdio_allocate_qs(struct qdio_irq *irq_ptr, int nr_input_qs,335 int nr_output_qs);336void qdio_setup_ssqd_info(struct qdio_irq *irq_ptr);337int qdio_setup_get_ssqd(struct qdio_irq *irq_ptr,338 struct subchannel_id *schid,339 struct qdio_ssqd_desc *data);340void qdio_setup_irq(struct qdio_irq *irq_ptr, struct qdio_initialize *init_data);341void qdio_shutdown_irq(struct qdio_irq *irq);342void qdio_print_subchannel_info(struct qdio_irq *irq_ptr);343void qdio_free_queues(struct qdio_irq *irq_ptr);344int qdio_setup_init(void);345void qdio_setup_exit(void);346 347int debug_get_buf_state(struct qdio_q *q, unsigned int bufnr,348 unsigned char *state);349#endif /* _CIO_QDIO_H */350