205 lines
6.9 KiB
C
205 lines
6.9 KiB
C
/*
|
|
* Copyright (c) 2003-2012 Broadcom Corporation
|
|
* All Rights Reserved
|
|
*
|
|
* This software is available to you under a choice of one of two
|
|
* licenses. You may choose to be licensed under the terms of the GNU
|
|
* General Public License (GPL) Version 2, available from the file
|
|
* COPYING in the main directory of this source tree, or the Broadcom
|
|
* license below:
|
|
*
|
|
* 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY BROADCOM ``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 BROADCOM 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.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/irqreturn.h>
|
|
#include <linux/irq.h>
|
|
#include <linux/interrupt.h>
|
|
|
|
#include <asm/mipsregs.h>
|
|
#include <asm/netlogic/interrupt.h>
|
|
#include <asm/netlogic/xlr/fmn.h>
|
|
#include <asm/netlogic/common.h>
|
|
|
|
#define COP2_CC_INIT_CPU_DEST(dest, conf) \
|
|
do { \
|
|
nlm_write_c2_cc##dest(0, conf[(dest * 8) + 0]); \
|
|
nlm_write_c2_cc##dest(1, conf[(dest * 8) + 1]); \
|
|
nlm_write_c2_cc##dest(2, conf[(dest * 8) + 2]); \
|
|
nlm_write_c2_cc##dest(3, conf[(dest * 8) + 3]); \
|
|
nlm_write_c2_cc##dest(4, conf[(dest * 8) + 4]); \
|
|
nlm_write_c2_cc##dest(5, conf[(dest * 8) + 5]); \
|
|
nlm_write_c2_cc##dest(6, conf[(dest * 8) + 6]); \
|
|
nlm_write_c2_cc##dest(7, conf[(dest * 8) + 7]); \
|
|
} while (0)
|
|
|
|
struct fmn_message_handler {
|
|
void (*action)(int, int, int, int, struct nlm_fmn_msg *, void *);
|
|
void *arg;
|
|
} msg_handlers[128];
|
|
|
|
/*
|
|
* FMN interrupt handler. We configure the FMN so that any messages in
|
|
* any of the CPU buckets will trigger an interrupt on the CPU.
|
|
* The message can be from any device on the FMN (like NAE/SAE/DMA).
|
|
* The source station id is used to figure out which of the registered
|
|
* handlers have to be called.
|
|
*/
|
|
static irqreturn_t fmn_message_handler(int irq, void *data)
|
|
{
|
|
struct fmn_message_handler *hndlr;
|
|
int bucket, rv;
|
|
int size = 0, code = 0, src_stnid = 0;
|
|
struct nlm_fmn_msg msg;
|
|
uint32_t mflags, bkt_status;
|
|
|
|
mflags = nlm_cop2_enable_irqsave();
|
|
/* Disable message ring interrupt */
|
|
nlm_fmn_setup_intr(irq, 0);
|
|
while (1) {
|
|
/* 8 bkts per core, [24:31] each bit represents one bucket
|
|
* Bit is Zero if bucket is not empty */
|
|
bkt_status = (nlm_read_c2_status0() >> 24) & 0xff;
|
|
if (bkt_status == 0xff)
|
|
break;
|
|
for (bucket = 0; bucket < 8; bucket++) {
|
|
/* Continue on empty bucket */
|
|
if (bkt_status & (1 << bucket))
|
|
continue;
|
|
rv = nlm_fmn_receive(bucket, &size, &code, &src_stnid,
|
|
&msg);
|
|
if (rv != 0)
|
|
continue;
|
|
|
|
hndlr = &msg_handlers[src_stnid];
|
|
if (hndlr->action == NULL)
|
|
pr_warn("No msgring handler for stnid %d\n",
|
|
src_stnid);
|
|
else {
|
|
nlm_cop2_disable_irqrestore(mflags);
|
|
hndlr->action(bucket, src_stnid, size, code,
|
|
&msg, hndlr->arg);
|
|
mflags = nlm_cop2_enable_irqsave();
|
|
}
|
|
}
|
|
};
|
|
/* Enable message ring intr, to any thread in core */
|
|
nlm_fmn_setup_intr(irq, (1 << nlm_threads_per_core) - 1);
|
|
nlm_cop2_disable_irqrestore(mflags);
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
struct irqaction fmn_irqaction = {
|
|
.handler = fmn_message_handler,
|
|
.flags = IRQF_PERCPU,
|
|
.name = "fmn",
|
|
};
|
|
|
|
void xlr_percpu_fmn_init(void)
|
|
{
|
|
struct xlr_fmn_info *cpu_fmn_info;
|
|
int *bucket_sizes;
|
|
uint32_t flags;
|
|
int id;
|
|
|
|
BUG_ON(nlm_thread_id() != 0);
|
|
id = nlm_core_id();
|
|
|
|
bucket_sizes = xlr_board_fmn_config.bucket_size;
|
|
cpu_fmn_info = &xlr_board_fmn_config.cpu[id];
|
|
flags = nlm_cop2_enable_irqsave();
|
|
|
|
/* Setup bucket sizes for the core. */
|
|
nlm_write_c2_bucksize(0, bucket_sizes[id * 8 + 0]);
|
|
nlm_write_c2_bucksize(1, bucket_sizes[id * 8 + 1]);
|
|
nlm_write_c2_bucksize(2, bucket_sizes[id * 8 + 2]);
|
|
nlm_write_c2_bucksize(3, bucket_sizes[id * 8 + 3]);
|
|
nlm_write_c2_bucksize(4, bucket_sizes[id * 8 + 4]);
|
|
nlm_write_c2_bucksize(5, bucket_sizes[id * 8 + 5]);
|
|
nlm_write_c2_bucksize(6, bucket_sizes[id * 8 + 6]);
|
|
nlm_write_c2_bucksize(7, bucket_sizes[id * 8 + 7]);
|
|
|
|
/*
|
|
* For sending FMN messages, we need credits on the destination
|
|
* bucket. Program the credits this core has on the 128 possible
|
|
* destination buckets.
|
|
* We cannot use a loop here, because the the first argument has
|
|
* to be a constant integer value.
|
|
*/
|
|
COP2_CC_INIT_CPU_DEST(0, cpu_fmn_info->credit_config);
|
|
COP2_CC_INIT_CPU_DEST(1, cpu_fmn_info->credit_config);
|
|
COP2_CC_INIT_CPU_DEST(2, cpu_fmn_info->credit_config);
|
|
COP2_CC_INIT_CPU_DEST(3, cpu_fmn_info->credit_config);
|
|
COP2_CC_INIT_CPU_DEST(4, cpu_fmn_info->credit_config);
|
|
COP2_CC_INIT_CPU_DEST(5, cpu_fmn_info->credit_config);
|
|
COP2_CC_INIT_CPU_DEST(6, cpu_fmn_info->credit_config);
|
|
COP2_CC_INIT_CPU_DEST(7, cpu_fmn_info->credit_config);
|
|
COP2_CC_INIT_CPU_DEST(8, cpu_fmn_info->credit_config);
|
|
COP2_CC_INIT_CPU_DEST(9, cpu_fmn_info->credit_config);
|
|
COP2_CC_INIT_CPU_DEST(10, cpu_fmn_info->credit_config);
|
|
COP2_CC_INIT_CPU_DEST(11, cpu_fmn_info->credit_config);
|
|
COP2_CC_INIT_CPU_DEST(12, cpu_fmn_info->credit_config);
|
|
COP2_CC_INIT_CPU_DEST(13, cpu_fmn_info->credit_config);
|
|
COP2_CC_INIT_CPU_DEST(14, cpu_fmn_info->credit_config);
|
|
COP2_CC_INIT_CPU_DEST(15, cpu_fmn_info->credit_config);
|
|
|
|
/* enable FMN interrupts on this CPU */
|
|
nlm_fmn_setup_intr(IRQ_FMN, (1 << nlm_threads_per_core) - 1);
|
|
nlm_cop2_disable_irqrestore(flags);
|
|
}
|
|
|
|
|
|
/*
|
|
* Register a FMN message handler with respect to the source station id
|
|
* @stnid: source station id
|
|
* @action: Handler function pointer
|
|
*/
|
|
int nlm_register_fmn_handler(int start_stnid, int end_stnid,
|
|
void (*action)(int, int, int, int, struct nlm_fmn_msg *, void *),
|
|
void *arg)
|
|
{
|
|
int sstnid;
|
|
|
|
for (sstnid = start_stnid; sstnid <= end_stnid; sstnid++) {
|
|
msg_handlers[sstnid].arg = arg;
|
|
smp_wmb();
|
|
msg_handlers[sstnid].action = action;
|
|
}
|
|
pr_debug("Registered FMN msg handler for stnid %d-%d\n",
|
|
start_stnid, end_stnid);
|
|
return 0;
|
|
}
|
|
|
|
void nlm_setup_fmn_irq(void)
|
|
{
|
|
uint32_t flags;
|
|
|
|
/* setup irq only once */
|
|
setup_irq(IRQ_FMN, &fmn_irqaction);
|
|
|
|
flags = nlm_cop2_enable_irqsave();
|
|
nlm_fmn_setup_intr(IRQ_FMN, (1 << nlm_threads_per_core) - 1);
|
|
nlm_cop2_disable_irqrestore(flags);
|
|
}
|