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System call delegation supports DMA alignment

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This commit is contained in:
Taku Shimosawa
2012-02-24 18:08:05 +09:00
parent dad780a133
commit a63b4a7369
7 changed files with 124 additions and 20 deletions
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36
linux/mod_mcctrl/control.c
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@ -8,6 +8,12 @@
#include <asm/msr.h>
#include "mcctrl.h"
#ifdef DEBUG
#define dprintk printk
#else
#define dprintk(...)
#endif
static DECLARE_WAIT_QUEUE_HEAD(wq_prepare);
extern struct mcctrl_channel *channels;
int mcctrl_ikc_set_recv_cpu(int cpu);
@ -145,6 +151,7 @@ int __do_in_kernel_syscall(aal_os_t os, struct mcctrl_channel *c,
static int remaining_job, base_cpu, job_pos;
extern int num_channels;
extern int mcctrl_dma_abort;
int mcexec_wait_syscall(aal_os_t os, struct syscall_wait_desc *__user req)
{
@ -163,6 +170,7 @@ int mcexec_wait_syscall(aal_os_t os, struct syscall_wait_desc *__user req)
c->req = 0;
#else
while (1) {
c = channels + swd.cpu;
rdtscll(s);
if (!remaining_job) {
while (!(*c->param.doorbell_va)) {
@ -193,9 +201,15 @@ int mcexec_wait_syscall(aal_os_t os, struct syscall_wait_desc *__user req)
} else {
c = channels + base_cpu + job_pos;
}
if (!c) {
continue;
}
if (c->param.request_va &&
c->param.request_va->valid) {
c->param.request_va->valid = 0; /* ack */
dprintk("SC #%lx, %lx\n",
c->param.request_va->number,
c->param.request_va->args[0]);
if (__do_in_kernel_syscall(os, c, c->param.request_va)) {
#endif
if (copy_to_user(&req->sr, c->param.request_va,
@ -204,6 +218,9 @@ int mcexec_wait_syscall(aal_os_t os, struct syscall_wait_desc *__user req)
}
#ifndef DO_USER_MODE
return 0;
}
if (mcctrl_dma_abort) {
return -2;
}
}
}
@ -283,16 +300,33 @@ long mcexec_ret_syscall(aal_os_t os, struct syscall_ret_desc *__user arg)
mc->param.response_va->ret = ret.ret;
if (ret.size > 0) {
/* Host => Accel. Write is fast. */
unsigned long phys;
void *rpm;
phys = aal_device_map_memory(aal_os_to_dev(os), ret.dest,
ret.size);
rpm = ioremap_wc(phys, ret.size);
memcpy(rpm, phys_to_virt(ret.src), ret.size);
mc->param.response_va->status = 1;
iounmap(rpm);
aal_device_unmap_memory(aal_os_to_dev(os), phys, ret.size);
/*
memset(&request, 0, sizeof(request));
request.src_os = NULL;
request.src_phys = ret.src;
request.dest_os = os;
request.dest_phys = ret.dest;
request.size = ret.size;
request.notify = (void *)mc->param.response_pa;
request.notify_os = os;
request.notify = (void *)mc->param.response_rpa;
request.priv = (void *)1;
aal_dma_request(channel, &request);
*/
} else {
mc->param.response_va->status = 1;
}