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freebsd-dev/sys/mips/rmi/on_chip.c

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/*-
* 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/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 <machine/reg.h>
#include <machine/cpu.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;
};
/* 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;
int xlr_counters[MAXCPU][XLR_MAX_COUNTERS] __aligned(XLR_CACHELINE_SIZE);
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;
/* if not thread 0 */
if (xlr_thr_id() != 0)
return;
id = xlr_cpu_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;
/* printf("[%s]: int_type = 0x%x, pop_num_buckets=%d, pop_bucket_mask=%x" */
/* "watermark_count=%d, thread_mask=%x\n", __FUNCTION__, */
/* msgring_int_type, msgring_pop_num_buckets, msgring_pop_bucket_mask, */
/* msgring_watermark_count, msgring_thread_mask); */
}
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;
xlr_inc_counter(MSGRNG_INT);
/* 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++) {
uint32_t cycles = 0;
if ((bucket_empty_bm & (1 << bucket))/*empty*/) continue;
status = message_receive(bucket, &size, &code, &rx_stid, &msg);
if (status) continue;
xlr_inc_counter(MSGRNG_MSG);
msgrng_msg_cycles = mips_rd_count();
cycles = msgrng_msg_cycles;
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=%llx, dropping message\n",
__FUNCTION__, tx_stid, bucket, size, 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_MSG_CYCLES, (read_c0_count()-cycles));
}
}
xlr_set_counter(MSGRNG_EXIT_STATUS, msgrng_read_status());
msgrng_flags_restore(mflags);
//dbg_msg("OUT irq=%d\n", irq);
/* Call the msg callback */
}
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);
}
extern void platform_prep_smp_launch(void);
extern void msgring_process_fast_intr(void *arg);
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);
mtx_lock_spin(&msgrng_lock);
tx_stn_handlers[major].action = action;
tx_stn_handlers[major].dev_id = dev_id;
mtx_unlock_spin(&msgrng_lock);
if (xlr_test_and_set(&msgring_int_enabled)) {
platform_prep_smp_launch();
cpu_establish_hardintr("msgring", (driver_filter_t *)NULL,
(driver_intr_t *)msgring_process_fast_intr,
NULL, IRQ_MSGRING, INTR_TYPE_NET|INTR_FAST, &cookie);
/* configure the msgring interrupt on cpu 0 */
enable_msgring_int(NULL);
}
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));
}
}
void on_chip_init(void)
{
int i=0, j=0;
/* 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();
for(i=0;i<MAXCPU;i++)
for(j=0;j<XLR_MAX_COUNTERS;j++)
atomic_set_int(&xlr_counters[i][j], 0);
}
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