fmn.c revision 211809
1211809Sjchandra/*- 2198160Srrs * Copyright (c) 2003-2009 RMI Corporation 3198160Srrs * All rights reserved. 4198160Srrs * 5198160Srrs * Redistribution and use in source and binary forms, with or without 6198160Srrs * modification, are permitted provided that the following conditions 7198160Srrs * are met: 8198160Srrs * 1. Redistributions of source code must retain the above copyright 9198160Srrs * notice, this list of conditions and the following disclaimer. 10198160Srrs * 2. Redistributions in binary form must reproduce the above copyright 11198160Srrs * notice, this list of conditions and the following disclaimer in the 12198160Srrs * documentation and/or other materials provided with the distribution. 13198160Srrs * 3. Neither the name of RMI Corporation, nor the names of its contributors, 14198160Srrs * may be used to endorse or promote products derived from this software 15198160Srrs * without specific prior written permission. 16198160Srrs * 17198160Srrs * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18198160Srrs * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19198160Srrs * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20198160Srrs * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21198160Srrs * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22198160Srrs * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23198160Srrs * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24198160Srrs * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25198160Srrs * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26198160Srrs * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27198160Srrs * SUCH DAMAGE. 28198160Srrs * 29198160Srrs * RMI_BSD */ 30203112Srrs#include <sys/cdefs.h> 31203112Srrs__FBSDID("$FreeBSD: head/sys/mips/rmi/fmn.c 211809 2010-08-25 09:53:00Z jchandra $"); 32198160Srrs#include <sys/types.h> 33198160Srrs#include <sys/systm.h> 34198160Srrs#include <sys/param.h> 35198160Srrs#include <sys/lock.h> 36198160Srrs#include <sys/mutex.h> 37198160Srrs#include <sys/proc.h> 38198160Srrs#include <sys/limits.h> 39198160Srrs#include <sys/bus.h> 40198160Srrs 41208165Srrs#include <sys/ktr.h> 42208165Srrs#include <sys/kernel.h> 43208165Srrs#include <sys/kthread.h> 44208165Srrs#include <sys/proc.h> 45208165Srrs#include <sys/resourcevar.h> 46208165Srrs#include <sys/sched.h> 47208165Srrs#include <sys/unistd.h> 48208165Srrs#include <sys/sysctl.h> 49208165Srrs#include <sys/malloc.h> 50208165Srrs 51198160Srrs#include <machine/reg.h> 52198160Srrs#include <machine/cpu.h> 53208165Srrs#include <machine/hwfunc.h> 54198160Srrs#include <machine/mips_opcode.h> 55198160Srrs 56198160Srrs#include <machine/param.h> 57198160Srrs#include <machine/intr_machdep.h> 58198607Srrs#include <mips/rmi/interrupt.h> 59198607Srrs#include <mips/rmi/msgring.h> 60198607Srrs#include <mips/rmi/pic.h> 61198607Srrs#include <mips/rmi/board.h> 62198160Srrs 63198625Srrsvoid 64198625Srrsdisable_msgring_int(void *arg); 65198625Srrsvoid 66198625Srrsenable_msgring_int(void *arg); 67198625Srrs 68198160Srrs/* definitions */ 69198160Srrsstruct tx_stn_handler { 70198625Srrs void (*action) (int, int, int, int, struct msgrng_msg *, void *); 71198160Srrs void *dev_id; 72198160Srrs}; 73198160Srrs 74208165Srrsstruct msgring_ithread { 75208165Srrs struct thread *i_thread; 76208165Srrs u_int i_pending; 77208165Srrs u_int i_flags; 78208165Srrs int i_cpu; 79208369Sjchandra int i_core; 80208165Srrs}; 81208165Srrs 82208165Srrsstruct msgring_ithread *msgring_ithreads[MAXCPU]; 83208165Srrs 84198160Srrs/* globals */ 85198160Srrsstatic struct tx_stn_handler tx_stn_handlers[MAX_TX_STNS]; 86198160Srrs 87198160Srrs#define MSGRNG_CC_INIT_CPU_DEST(dest, counter) \ 88198160Srrsdo { \ 89198160Srrs msgrng_write_cc(MSGRNG_CC_##dest##_REG, counter[dest][0], 0 ); \ 90198160Srrs msgrng_write_cc(MSGRNG_CC_##dest##_REG, counter[dest][1], 1 ); \ 91198160Srrs msgrng_write_cc(MSGRNG_CC_##dest##_REG, counter[dest][2], 2 ); \ 92198160Srrs msgrng_write_cc(MSGRNG_CC_##dest##_REG, counter[dest][3], 3 ); \ 93198160Srrs msgrng_write_cc(MSGRNG_CC_##dest##_REG, counter[dest][4], 4 ); \ 94198160Srrs msgrng_write_cc(MSGRNG_CC_##dest##_REG, counter[dest][5], 5 ); \ 95198160Srrs msgrng_write_cc(MSGRNG_CC_##dest##_REG, counter[dest][6], 6 ); \ 96198160Srrs msgrng_write_cc(MSGRNG_CC_##dest##_REG, counter[dest][7], 7 ); \ 97198160Srrs} while(0) 98198160Srrs 99198160Srrs 100198160Srrs/* make this a read/write spinlock */ 101198160Srrsstatic struct mtx msgrng_lock; 102198160Srrsstatic int msgring_int_enabled; 103198625Srrsstatic int msgring_pop_num_buckets; 104198625Srrsstatic uint32_t msgring_pop_bucket_mask; 105198625Srrsstatic int msgring_int_type; 106198625Srrsstatic int msgring_watermark_count; 107198625Srrsstatic uint32_t msgring_thread_mask; 108198160Srrsuint32_t msgrng_msg_cycles = 0; 109198160Srrs 110198160Srrsvoid xlr_msgring_handler(struct trapframe *); 111198160Srrs 112198625Srrsvoid 113198625Srrsxlr_msgring_cpu_init(void) 114198160Srrs{ 115198160Srrs struct stn_cc *cc_config; 116198160Srrs struct bucket_size *bucket_sizes; 117198160Srrs int id; 118198160Srrs unsigned long flags; 119198160Srrs 120208165Srrs KASSERT(xlr_thr_id() == 0, 121208165Srrs ("xlr_msgring_cpu_init from non-zero thread\n")); 122198160Srrs 123208165Srrs id = xlr_core_id(); 124208165Srrs 125198160Srrs bucket_sizes = xlr_board_info.bucket_sizes; 126198160Srrs cc_config = xlr_board_info.credit_configs[id]; 127198160Srrs 128198160Srrs msgrng_flags_save(flags); 129198625Srrs 130198625Srrs /* 131198625Srrs * Message Stations are shared among all threads in a cpu core 132198625Srrs * Assume, thread 0 on all cores are always active when more than 1 133198625Srrs * thread is active in a core 134198160Srrs */ 135198625Srrs msgrng_write_bucksize(0, bucket_sizes->bucket[id * 8 + 0]); 136198625Srrs msgrng_write_bucksize(1, bucket_sizes->bucket[id * 8 + 1]); 137198625Srrs msgrng_write_bucksize(2, bucket_sizes->bucket[id * 8 + 2]); 138198625Srrs msgrng_write_bucksize(3, bucket_sizes->bucket[id * 8 + 3]); 139198625Srrs msgrng_write_bucksize(4, bucket_sizes->bucket[id * 8 + 4]); 140198625Srrs msgrng_write_bucksize(5, bucket_sizes->bucket[id * 8 + 5]); 141198625Srrs msgrng_write_bucksize(6, bucket_sizes->bucket[id * 8 + 6]); 142198625Srrs msgrng_write_bucksize(7, bucket_sizes->bucket[id * 8 + 7]); 143198160Srrs 144198160Srrs MSGRNG_CC_INIT_CPU_DEST(0, cc_config->counters); 145198160Srrs MSGRNG_CC_INIT_CPU_DEST(1, cc_config->counters); 146198160Srrs MSGRNG_CC_INIT_CPU_DEST(2, cc_config->counters); 147198160Srrs MSGRNG_CC_INIT_CPU_DEST(3, cc_config->counters); 148198160Srrs MSGRNG_CC_INIT_CPU_DEST(4, cc_config->counters); 149198160Srrs MSGRNG_CC_INIT_CPU_DEST(5, cc_config->counters); 150198160Srrs MSGRNG_CC_INIT_CPU_DEST(6, cc_config->counters); 151198160Srrs MSGRNG_CC_INIT_CPU_DEST(7, cc_config->counters); 152198160Srrs MSGRNG_CC_INIT_CPU_DEST(8, cc_config->counters); 153198160Srrs MSGRNG_CC_INIT_CPU_DEST(9, cc_config->counters); 154198160Srrs MSGRNG_CC_INIT_CPU_DEST(10, cc_config->counters); 155198160Srrs MSGRNG_CC_INIT_CPU_DEST(11, cc_config->counters); 156198160Srrs MSGRNG_CC_INIT_CPU_DEST(12, cc_config->counters); 157198160Srrs MSGRNG_CC_INIT_CPU_DEST(13, cc_config->counters); 158198160Srrs MSGRNG_CC_INIT_CPU_DEST(14, cc_config->counters); 159198160Srrs MSGRNG_CC_INIT_CPU_DEST(15, cc_config->counters); 160198160Srrs 161198160Srrs msgrng_flags_restore(flags); 162198160Srrs} 163198160Srrs 164198625Srrsvoid 165198625Srrsxlr_msgring_config(void) 166198160Srrs{ 167211802Sjchandra mtx_init(&msgrng_lock, "msgring", NULL, MTX_SPIN | MTX_RECURSE); 168198160Srrs msgring_int_type = 0x02; 169198160Srrs msgring_pop_num_buckets = 8; 170198160Srrs msgring_pop_bucket_mask = 0xff; 171211802Sjchandra msgring_int_enabled = 0; 172198160Srrs msgring_watermark_count = 1; 173198160Srrs msgring_thread_mask = 0x01; 174198160Srrs} 175198160Srrs 176198625Srrsvoid 177198625Srrsxlr_msgring_handler(struct trapframe *tf) 178198160Srrs{ 179198160Srrs unsigned long mflags; 180198625Srrs int bucket = 0; 181198625Srrs int size = 0, code = 0, rx_stid = 0, tx_stid = 0; 182198160Srrs struct msgrng_msg msg; 183198160Srrs unsigned int bucket_empty_bm = 0; 184198625Srrs unsigned int status = 0; 185198160Srrs 186198160Srrs /* TODO: not necessary to disable preemption */ 187198160Srrs msgrng_flags_save(mflags); 188198160Srrs 189198160Srrs /* First Drain all the high priority messages */ 190198625Srrs for (;;) { 191198160Srrs bucket_empty_bm = (msgrng_read_status() >> 24) & msgring_pop_bucket_mask; 192198160Srrs 193198625Srrs /* all buckets empty, break */ 194198625Srrs if (bucket_empty_bm == msgring_pop_bucket_mask) 195198625Srrs break; 196198160Srrs 197198625Srrs for (bucket = 0; bucket < msgring_pop_num_buckets; bucket++) { 198198625Srrs if ((bucket_empty_bm & (1 << bucket)) /* empty */ ) 199198625Srrs continue; 200198625Srrs 201198160Srrs status = message_receive(bucket, &size, &code, &rx_stid, &msg); 202198625Srrs if (status) 203198625Srrs continue; 204198625Srrs 205198160Srrs tx_stid = xlr_board_info.msgmap[rx_stid]; 206198160Srrs 207198160Srrs if (!tx_stn_handlers[tx_stid].action) { 208198160Srrs printf("[%s]: No Handler for message from stn_id=%d, bucket=%d, " 209209808Sjchandra "size=%d, msg0=%jx, dropping message\n", 210209808Sjchandra __FUNCTION__, tx_stid, bucket, size, (uintmax_t)msg.msg0); 211198625Srrs } else { 212198160Srrs //printf("[%s]: rx_stid = %d\n", __FUNCTION__, rx_stid); 213198160Srrs msgrng_flags_restore(mflags); 214198625Srrs (*tx_stn_handlers[tx_stid].action) (bucket, size, code, rx_stid, 215198625Srrs &msg, tx_stn_handlers[tx_stid].dev_id); 216198160Srrs msgrng_flags_save(mflags); 217198625Srrs } 218198160Srrs } 219198160Srrs } 220198160Srrs msgrng_flags_restore(mflags); 221198160Srrs} 222198160Srrs 223198625Srrsvoid 224198625Srrsenable_msgring_int(void *arg) 225198160Srrs{ 226198625Srrs unsigned long mflags = 0; 227198160Srrs 228198160Srrs msgrng_access_save(&msgrng_lock, mflags); 229198160Srrs /* enable the message ring interrupts */ 230198625Srrs msgrng_write_config((msgring_watermark_count << 24) | (IRQ_MSGRING << 16) 231198625Srrs | (msgring_thread_mask << 8) | msgring_int_type); 232198625Srrs msgrng_access_restore(&msgrng_lock, mflags); 233198160Srrs} 234198160Srrs 235198625Srrsvoid 236198625Srrsdisable_msgring_int(void *arg) 237198160Srrs{ 238198625Srrs unsigned long mflags = 0; 239198160Srrs uint32_t config; 240198160Srrs 241198160Srrs msgrng_access_save(&msgrng_lock, mflags); 242198160Srrs config = msgrng_read_config(); 243198160Srrs config &= ~0x3; 244198160Srrs msgrng_write_config(config); 245198625Srrs msgrng_access_restore(&msgrng_lock, mflags); 246198160Srrs} 247198160Srrs 248208165Srrsstatic int 249208165Srrsmsgring_process_fast_intr(void *arg) 250208165Srrs{ 251208369Sjchandra int core = xlr_core_id(); 252208165Srrs volatile struct msgring_ithread *it; 253208165Srrs struct thread *td; 254198160Srrs 255208165Srrs /* wakeup an appropriate intr_thread for processing this interrupt */ 256208369Sjchandra it = (volatile struct msgring_ithread *)msgring_ithreads[core]; 257208369Sjchandra KASSERT(it != NULL, ("No interrupt thread on cpu %d", core)); 258208165Srrs td = it->i_thread; 259208165Srrs 260208165Srrs /* 261208165Srrs * Interrupt thread will enable the interrupts after processing all 262208165Srrs * messages 263208165Srrs */ 264208165Srrs disable_msgring_int(NULL); 265208165Srrs atomic_store_rel_int(&it->i_pending, 1); 266208165Srrs thread_lock(td); 267208165Srrs if (TD_AWAITING_INTR(td)) { 268208165Srrs TD_CLR_IWAIT(td); 269208165Srrs sched_add(td, SRQ_INTR); 270208165Srrs } 271208165Srrs thread_unlock(td); 272208165Srrs return FILTER_HANDLED; 273208165Srrs} 274208165Srrs 275208165Srrsstatic void 276208165Srrsmsgring_process(void *arg) 277208165Srrs{ 278208165Srrs volatile struct msgring_ithread *ithd; 279208165Srrs struct thread *td; 280208165Srrs struct proc *p; 281208165Srrs 282208165Srrs td = curthread; 283208165Srrs p = td->td_proc; 284208165Srrs ithd = (volatile struct msgring_ithread *)arg; 285208165Srrs KASSERT(ithd->i_thread == td, 286208165Srrs ("%s:msg_ithread and proc linkage out of sync", __func__)); 287208165Srrs 288208165Srrs /* First bind this thread to the right CPU */ 289208165Srrs thread_lock(td); 290208369Sjchandra 291208165Srrs sched_bind(td, ithd->i_cpu); 292208165Srrs thread_unlock(td); 293208165Srrs 294208369Sjchandra atomic_store_rel_ptr((volatile uintptr_t *)&msgring_ithreads[ithd->i_core], 295208165Srrs (uintptr_t)arg); 296208165Srrs enable_msgring_int(NULL); 297208165Srrs 298208165Srrs while (1) { 299208165Srrs while (ithd->i_pending) { 300208165Srrs /* 301208165Srrs * This might need a full read and write barrier to 302208165Srrs * make sure that this write posts before any of the 303208165Srrs * memory or device accesses in the handlers. 304208165Srrs */ 305208165Srrs xlr_msgring_handler(NULL); 306208165Srrs atomic_store_rel_int(&ithd->i_pending, 0); 307208165Srrs enable_msgring_int(NULL); 308208165Srrs } 309208165Srrs if (!ithd->i_pending) { 310208165Srrs thread_lock(td); 311208165Srrs if (ithd->i_pending) { 312208165Srrs thread_unlock(td); 313208165Srrs continue; 314208165Srrs } 315208165Srrs sched_class(td, PRI_ITHD); 316208165Srrs TD_SET_IWAIT(td); 317208165Srrs mi_switch(SW_VOL, NULL); 318208165Srrs thread_unlock(td); 319208165Srrs } 320208165Srrs } 321208165Srrs 322208165Srrs} 323208165Srrs 324208165Srrsstatic void 325208369Sjchandracreate_msgring_thread(int core, int cpu) 326208165Srrs{ 327208165Srrs struct msgring_ithread *ithd; 328208165Srrs struct thread *td; 329208165Srrs struct proc *p; 330208165Srrs int error; 331208165Srrs 332208165Srrs /* Create kernel thread for message ring interrupt processing */ 333208165Srrs /* Currently create one task for thread 0 of each core */ 334208165Srrs ithd = malloc(sizeof(struct msgring_ithread), 335208165Srrs M_DEVBUF, M_WAITOK | M_ZERO); 336208165Srrs error = kproc_create(msgring_process, (void *)ithd, &p, 337208165Srrs RFSTOPPED | RFHIGHPID, 2, "msg_intr%d", cpu); 338208165Srrs 339208165Srrs if (error) 340208165Srrs panic("kproc_create() failed with %d", error); 341208165Srrs td = FIRST_THREAD_IN_PROC(p); /* XXXKSE */ 342208165Srrs 343208165Srrs ithd->i_thread = td; 344208165Srrs ithd->i_pending = 0; 345208165Srrs ithd->i_cpu = cpu; 346208369Sjchandra ithd->i_core = core; 347208165Srrs 348208165Srrs thread_lock(td); 349208165Srrs sched_class(td, PRI_ITHD); 350208165Srrs sched_add(td, SRQ_INTR); 351208165Srrs thread_unlock(td); 352210845Sjchandra CTR2(KTR_INTR, "%s: created %s", __func__, td->td_name); 353208165Srrs} 354208165Srrs 355198625Srrsint 356198625Srrsregister_msgring_handler(int major, 357198625Srrs void (*action) (int, int, int, int, struct msgrng_msg *, void *), 358198625Srrs void *dev_id) 359198160Srrs{ 360198625Srrs void *cookie; /* FIXME - use? */ 361198160Srrs 362198625Srrs if (major >= MAX_TX_STNS) 363198160Srrs return 1; 364198160Srrs 365198160Srrs //dbg_msg("major=%d, action=%p, dev_id=%p\n", major, action, dev_id); 366198160Srrs 367198956Srrs if (rmi_spin_mutex_safe) 368198956Srrs mtx_lock_spin(&msgrng_lock); 369198160Srrs tx_stn_handlers[major].action = action; 370198160Srrs tx_stn_handlers[major].dev_id = dev_id; 371198956Srrs if (rmi_spin_mutex_safe) 372198956Srrs mtx_unlock_spin(&msgrng_lock); 373198625Srrs 374198160Srrs if (xlr_test_and_set(&msgring_int_enabled)) { 375208369Sjchandra create_msgring_thread(0, 0); 376203112Srrs cpu_establish_hardintr("msgring", (driver_filter_t *) msgring_process_fast_intr, 377203112Srrs NULL, NULL, IRQ_MSGRING, 378203112Srrs INTR_TYPE_NET | INTR_FAST, &cookie); 379198160Srrs } 380198160Srrs return 0; 381198160Srrs} 382198160Srrs 383208165Srrsstatic void 384208165Srrsstart_msgring_threads(void *arg) 385208165Srrs{ 386208369Sjchandra int core, cpu; 387208165Srrs 388208369Sjchandra for (core = 1; core < XLR_MAX_CORES; core++) { 389208369Sjchandra if ((xlr_hw_thread_mask >> (4 * core)) & 0xf) { 390208369Sjchandra /* start one thread for an enabled core */ 391208369Sjchandra cpu = xlr_hwtid_to_cpuid[4 * core]; 392208369Sjchandra create_msgring_thread(core, cpu); 393208369Sjchandra } 394208369Sjchandra } 395198160Srrs} 396208165Srrs 397208165SrrsSYSINIT(start_msgring_threads, SI_SUB_SMP, SI_ORDER_MIDDLE, start_msgring_threads, NULL); 398