d/freebsd-skq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
d9f088a03e
freebsd-skq/sys/mips/rmi/on_chip.c

447 lines
12 KiB
C
Raw Blame History

/*-
* Copyright (c) 2003-2009 RMI Corporation
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of RMI Corporation, nor the names of its contributors,
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* RMI_BSD */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <sys/systm.h>
#include <sys/param.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/proc.h>
#include <sys/limits.h>
#include <sys/bus.h>
#include <sys/ktr.h>
#include <sys/kernel.h>
#include <sys/kthread.h>
#include <sys/proc.h>
#include <sys/resourcevar.h>
#include <sys/sched.h>
#include <sys/unistd.h>
#include <sys/sysctl.h>
#include <sys/malloc.h>
#include <machine/reg.h>
#include <machine/cpu.h>
#include <machine/hwfunc.h>
#include <machine/mips_opcode.h>
#include <machine/param.h>
#include <machine/intr_machdep.h>
#include <mips/rmi/interrupt.h>
#include <mips/rmi/msgring.h>
#include <mips/rmi/iomap.h>
#include <mips/rmi/debug.h>
#include <mips/rmi/pic.h>
#include <mips/rmi/board.h>
void
disable_msgring_int(void *arg);
void
enable_msgring_int(void *arg);
/* definitions */
struct tx_stn_handler {
void (*action) (int, int, int, int, struct msgrng_msg *, void *);
void *dev_id;
};
struct msgring_ithread {
struct thread *i_thread;
u_int i_pending;
u_int i_flags;
int i_cpu;
int i_core;
};
struct msgring_ithread *msgring_ithreads[MAXCPU];
/* globals */
static struct tx_stn_handler tx_stn_handlers[MAX_TX_STNS];
#define MSGRNG_CC_INIT_CPU_DEST(dest, counter) \
do { \
msgrng_write_cc(MSGRNG_CC_##dest##_REG, counter[dest][0], 0 ); \
msgrng_write_cc(MSGRNG_CC_##dest##_REG, counter[dest][1], 1 ); \
msgrng_write_cc(MSGRNG_CC_##dest##_REG, counter[dest][2], 2 ); \
msgrng_write_cc(MSGRNG_CC_##dest##_REG, counter[dest][3], 3 ); \
msgrng_write_cc(MSGRNG_CC_##dest##_REG, counter[dest][4], 4 ); \
msgrng_write_cc(MSGRNG_CC_##dest##_REG, counter[dest][5], 5 ); \
msgrng_write_cc(MSGRNG_CC_##dest##_REG, counter[dest][6], 6 ); \
msgrng_write_cc(MSGRNG_CC_##dest##_REG, counter[dest][7], 7 ); \
} while(0)
/* make this a read/write spinlock */
static struct mtx msgrng_lock;
static int msgring_int_enabled;
struct mtx xlr_pic_lock;
static int msgring_pop_num_buckets;
static uint32_t msgring_pop_bucket_mask;
static int msgring_int_type;
static int msgring_watermark_count;
static uint32_t msgring_thread_mask;
uint32_t msgrng_msg_cycles = 0;
void xlr_msgring_handler(struct trapframe *);
void
xlr_msgring_cpu_init(void)
{
struct stn_cc *cc_config;
struct bucket_size *bucket_sizes;
int id;
unsigned long flags;
KASSERT(xlr_thr_id() == 0,
("xlr_msgring_cpu_init from non-zero thread\n"));
id = xlr_core_id();
bucket_sizes = xlr_board_info.bucket_sizes;
cc_config = xlr_board_info.credit_configs[id];
msgrng_flags_save(flags);
/*
* Message Stations are shared among all threads in a cpu core
* Assume, thread 0 on all cores are always active when more than 1
* thread is active in a core
*/
msgrng_write_bucksize(0, bucket_sizes->bucket[id * 8 + 0]);
msgrng_write_bucksize(1, bucket_sizes->bucket[id * 8 + 1]);
msgrng_write_bucksize(2, bucket_sizes->bucket[id * 8 + 2]);
msgrng_write_bucksize(3, bucket_sizes->bucket[id * 8 + 3]);
msgrng_write_bucksize(4, bucket_sizes->bucket[id * 8 + 4]);
msgrng_write_bucksize(5, bucket_sizes->bucket[id * 8 + 5]);
msgrng_write_bucksize(6, bucket_sizes->bucket[id * 8 + 6]);
msgrng_write_bucksize(7, bucket_sizes->bucket[id * 8 + 7]);
MSGRNG_CC_INIT_CPU_DEST(0, cc_config->counters);
MSGRNG_CC_INIT_CPU_DEST(1, cc_config->counters);
MSGRNG_CC_INIT_CPU_DEST(2, cc_config->counters);
MSGRNG_CC_INIT_CPU_DEST(3, cc_config->counters);
MSGRNG_CC_INIT_CPU_DEST(4, cc_config->counters);
MSGRNG_CC_INIT_CPU_DEST(5, cc_config->counters);
MSGRNG_CC_INIT_CPU_DEST(6, cc_config->counters);
MSGRNG_CC_INIT_CPU_DEST(7, cc_config->counters);
MSGRNG_CC_INIT_CPU_DEST(8, cc_config->counters);
MSGRNG_CC_INIT_CPU_DEST(9, cc_config->counters);
MSGRNG_CC_INIT_CPU_DEST(10, cc_config->counters);
MSGRNG_CC_INIT_CPU_DEST(11, cc_config->counters);
MSGRNG_CC_INIT_CPU_DEST(12, cc_config->counters);
MSGRNG_CC_INIT_CPU_DEST(13, cc_config->counters);
MSGRNG_CC_INIT_CPU_DEST(14, cc_config->counters);
MSGRNG_CC_INIT_CPU_DEST(15, cc_config->counters);
msgrng_flags_restore(flags);
}
void
xlr_msgring_config(void)
{
msgring_int_type = 0x02;
msgring_pop_num_buckets = 8;
msgring_pop_bucket_mask = 0xff;
msgring_watermark_count = 1;
msgring_thread_mask = 0x01;
}
void
xlr_msgring_handler(struct trapframe *tf)
{
unsigned long mflags;
int bucket = 0;
int size = 0, code = 0, rx_stid = 0, tx_stid = 0;
struct msgrng_msg msg;
unsigned int bucket_empty_bm = 0;
unsigned int status = 0;
/* TODO: not necessary to disable preemption */
msgrng_flags_save(mflags);
/* First Drain all the high priority messages */
for (;;) {
bucket_empty_bm = (msgrng_read_status() >> 24) & msgring_pop_bucket_mask;
/* all buckets empty, break */
if (bucket_empty_bm == msgring_pop_bucket_mask)
break;
for (bucket = 0; bucket < msgring_pop_num_buckets; bucket++) {
if ((bucket_empty_bm & (1 << bucket)) /* empty */ )
continue;
status = message_receive(bucket, &size, &code, &rx_stid, &msg);
if (status)
continue;
tx_stid = xlr_board_info.msgmap[rx_stid];
if (!tx_stn_handlers[tx_stid].action) {
printf("[%s]: No Handler for message from stn_id=%d, bucket=%d, "
"size=%d, msg0=%jx, dropping message\n",
__FUNCTION__, tx_stid, bucket, size, (uintmax_t)msg.msg0);
} else {
//printf("[%s]: rx_stid = %d\n", __FUNCTION__, rx_stid);
msgrng_flags_restore(mflags);
(*tx_stn_handlers[tx_stid].action) (bucket, size, code, rx_stid,
&msg, tx_stn_handlers[tx_stid].dev_id);
msgrng_flags_save(mflags);
}
}
}
xlr_set_counter(MSGRNG_EXIT_STATUS, msgrng_read_status());
msgrng_flags_restore(mflags);
}
void
enable_msgring_int(void *arg)
{
unsigned long mflags = 0;
msgrng_access_save(&msgrng_lock, mflags);
/* enable the message ring interrupts */
msgrng_write_config((msgring_watermark_count << 24) | (IRQ_MSGRING << 16)
| (msgring_thread_mask << 8) | msgring_int_type);
msgrng_access_restore(&msgrng_lock, mflags);
}
void
disable_msgring_int(void *arg)
{
unsigned long mflags = 0;
uint32_t config;
msgrng_access_save(&msgrng_lock, mflags);
config = msgrng_read_config();
config &= ~0x3;
msgrng_write_config(config);
msgrng_access_restore(&msgrng_lock, mflags);
}
static int
msgring_process_fast_intr(void *arg)
{
int core = xlr_core_id();
volatile struct msgring_ithread *it;
struct thread *td;
/* wakeup an appropriate intr_thread for processing this interrupt */
it = (volatile struct msgring_ithread *)msgring_ithreads[core];
KASSERT(it != NULL, ("No interrupt thread on cpu %d", core));
td = it->i_thread;
/*
* Interrupt thread will enable the interrupts after processing all
* messages
*/
disable_msgring_int(NULL);
atomic_store_rel_int(&it->i_pending, 1);
thread_lock(td);
if (TD_AWAITING_INTR(td)) {
TD_CLR_IWAIT(td);
sched_add(td, SRQ_INTR);
}
thread_unlock(td);
return FILTER_HANDLED;
}
static void
msgring_process(void *arg)
{
volatile struct msgring_ithread *ithd;
struct thread *td;
struct proc *p;
td = curthread;
p = td->td_proc;
ithd = (volatile struct msgring_ithread *)arg;
KASSERT(ithd->i_thread == td,
("%s:msg_ithread and proc linkage out of sync", __func__));
/* First bind this thread to the right CPU */
thread_lock(td);
sched_bind(td, ithd->i_cpu);
thread_unlock(td);
atomic_store_rel_ptr((volatile uintptr_t *)&msgring_ithreads[ithd->i_core],
(uintptr_t)arg);
enable_msgring_int(NULL);
while (1) {
while (ithd->i_pending) {
/*
* This might need a full read and write barrier to
* make sure that this write posts before any of the
* memory or device accesses in the handlers.
*/
xlr_msgring_handler(NULL);
atomic_store_rel_int(&ithd->i_pending, 0);
enable_msgring_int(NULL);
}
if (!ithd->i_pending) {
thread_lock(td);
if (ithd->i_pending) {
thread_unlock(td);
continue;
}
sched_class(td, PRI_ITHD);
TD_SET_IWAIT(td);
mi_switch(SW_VOL, NULL);
thread_unlock(td);
}
}
}
static void
create_msgring_thread(int core, int cpu)
{
struct msgring_ithread *ithd;
struct thread *td;
struct proc *p;
int error;
/* Create kernel thread for message ring interrupt processing */
/* Currently create one task for thread 0 of each core */
ithd = malloc(sizeof(struct msgring_ithread),
M_DEVBUF, M_WAITOK | M_ZERO);
error = kproc_create(msgring_process, (void *)ithd, &p,
RFSTOPPED | RFHIGHPID, 2, "msg_intr%d", cpu);
if (error)
panic("kproc_create() failed with %d", error);
td = FIRST_THREAD_IN_PROC(p); /* XXXKSE */
ithd->i_thread = td;
ithd->i_pending = 0;
ithd->i_cpu = cpu;
ithd->i_core = core;
thread_lock(td);
sched_class(td, PRI_ITHD);
sched_add(td, SRQ_INTR);
thread_unlock(td);
CTR2(KTR_INTR, "%s: created %s", __func__, td->td_name);
}
int
register_msgring_handler(int major,
void (*action) (int, int, int, int, struct msgrng_msg *, void *),
void *dev_id)
{
void *cookie; /* FIXME - use? */
if (major >= MAX_TX_STNS)
return 1;
//dbg_msg("major=%d, action=%p, dev_id=%p\n", major, action, dev_id);
if (rmi_spin_mutex_safe)
mtx_lock_spin(&msgrng_lock);
tx_stn_handlers[major].action = action;
tx_stn_handlers[major].dev_id = dev_id;
if (rmi_spin_mutex_safe)
mtx_unlock_spin(&msgrng_lock);
if (xlr_test_and_set(&msgring_int_enabled)) {
create_msgring_thread(0, 0);
cpu_establish_hardintr("msgring", (driver_filter_t *) msgring_process_fast_intr,
NULL, NULL, IRQ_MSGRING,
INTR_TYPE_NET | INTR_FAST, &cookie);
}
return 0;
}
static void
pic_init(void)
{
xlr_reg_t *mmio = xlr_io_mmio(XLR_IO_PIC_OFFSET);
int i = 0;
int level;
dbg_msg("Initializing PIC...\n");
for (i = 0; i < PIC_NUM_IRTS; i++) {
level = PIC_IRQ_IS_EDGE_TRIGGERED(i);
/* Bind all PIC irqs to cpu 0 */
xlr_write_reg(mmio, PIC_IRT_0_BASE + i, 0x01);
/*
* Use local scheduling and high polarity for all IRTs
* Invalidate all IRTs, by default
*/
xlr_write_reg(mmio, PIC_IRT_1_BASE + i, (level << 30) | (1 << 6) |
(PIC_IRQ_BASE + i));
}
dbg_msg("PIC init now done\n");
}
void
on_chip_init(void)
{
/* Set xlr_io_base to the run time value */
mtx_init(&msgrng_lock, "msgring", NULL, MTX_SPIN | MTX_RECURSE);
mtx_init(&xlr_pic_lock, "pic", NULL, MTX_SPIN);
xlr_board_info_setup();
msgring_int_enabled = 0;
xlr_msgring_config();
pic_init();
xlr_msgring_cpu_init();
}
static void
start_msgring_threads(void *arg)
{
int core, cpu;
for (core = 1; core < XLR_MAX_CORES; core++) {
if ((xlr_hw_thread_mask >> (4 * core)) & 0xf) {
/* start one thread for an enabled core */
cpu = xlr_hwtid_to_cpuid[4 * core];
create_msgring_thread(core, cpu);
}
}
}
SYSINIT(start_msgring_threads, SI_SUB_SMP, SI_ORDER_MIDDLE, start_msgring_threads, NULL);
Reference in New Issue View Git Blame Copy Permalink