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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] This patch is to fix the NIC driven mechanism to make it event
# HG changeset patch
# User kaf24@xxxxxxxxxxxxxxxxxxxx
# Node ID 32695e99cfc88f00e881f1bee5a1963877adbc57
# Parent 8e1bfcb901e59e8d33dc185ab8920c7a79a73db6
This patch is to fix the NIC driven mechanism to make it event
driven. We will also send it to Qemu mailing list.
Signed-off-by: Eddie Dong <eddie.dong@xxxxxxxxx>
diff -r 8e1bfcb901e5 -r 32695e99cfc8 tools/ioemu/hw/ne2000.c
--- a/tools/ioemu/hw/ne2000.c Sun Oct 30 15:43:05 2005
+++ b/tools/ioemu/hw/ne2000.c Sun Oct 30 15:47:59 2005
@@ -327,6 +327,7 @@
break;
}
}
+ update_select_wakeup_events();
}
static uint32_t ne2000_ioport_read(void *opaque, uint32_t addr)
@@ -373,6 +374,7 @@
break;
}
}
+ update_select_wakeup_events();
#ifdef DEBUG_NE2000
printf("NE2000: read addr=0x%x val=%02x\n", addr, ret);
#endif
@@ -476,6 +478,7 @@
ne2000_mem_writeb(s, s->rsar, val);
ne2000_dma_update(s, 1);
}
+ update_select_wakeup_events();
}
static uint32_t ne2000_asic_ioport_read(void *opaque, uint32_t addr)
@@ -492,6 +495,7 @@
ret = ne2000_mem_readb(s, s->rsar);
ne2000_dma_update(s, 1);
}
+ update_select_wakeup_events();
#ifdef DEBUG_NE2000
printf("NE2000: asic read val=0x%04x\n", ret);
#endif
@@ -510,6 +514,7 @@
/* 32 bit access */
ne2000_mem_writel(s, s->rsar, val);
ne2000_dma_update(s, 4);
+ update_select_wakeup_events();
}
static uint32_t ne2000_asic_ioport_readl(void *opaque, uint32_t addr)
@@ -520,6 +525,7 @@
/* 32 bit access */
ret = ne2000_mem_readl(s, s->rsar);
ne2000_dma_update(s, 4);
+ update_select_wakeup_events();
#ifdef DEBUG_NE2000
printf("NE2000: asic readl val=0x%04x\n", ret);
#endif
@@ -535,6 +541,7 @@
{
NE2000State *s = opaque;
ne2000_reset(s);
+ update_select_wakeup_events();
return 0;
}
diff -r 8e1bfcb901e5 -r 32695e99cfc8 tools/ioemu/hw/pcnet.c
--- a/tools/ioemu/hw/pcnet.c Sun Oct 30 15:43:05 2005
+++ b/tools/ioemu/hw/pcnet.c Sun Oct 30 15:47:59 2005
@@ -50,7 +50,6 @@
struct PCNetState_st {
PCIDevice dev;
NetDriverState *nd;
- QEMUTimer *poll_timer;
int mmio_io_addr, rap, isr, lnkst;
target_phys_addr_t rdra, tdra;
uint8_t prom[16];
@@ -640,8 +639,6 @@
{
PCNetState *s = opaque;
- qemu_del_timer(s->poll_timer);
-
if (CSR_TDMD(s)) {
pcnet_transmit(s);
}
@@ -660,8 +657,6 @@
} else
CSR_POLL(s) = t;
}
- qemu_mod_timer(s->poll_timer,
- pcnet_get_next_poll_time(s,qemu_get_clock(vm_clock)));
}
}
@@ -941,6 +936,7 @@
}
}
pcnet_update_irq(s);
+ update_select_wakeup_events();
}
static uint32_t pcnet_ioport_readw(void *opaque, uint32_t addr)
@@ -966,6 +962,7 @@
}
}
pcnet_update_irq(s);
+ update_select_wakeup_events();
#ifdef PCNET_DEBUG_IO
printf("pcnet_ioport_readw addr=0x%08x val=0x%04x\n", addr, val & 0xffff);
#endif
@@ -1000,6 +997,7 @@
#endif
}
pcnet_update_irq(s);
+ update_select_wakeup_events();
}
static uint32_t pcnet_ioport_readl(void *opaque, uint32_t addr)
@@ -1025,6 +1023,7 @@
}
}
pcnet_update_irq(s);
+ update_select_wakeup_events();
#ifdef PCNET_DEBUG_IO
printf("pcnet_ioport_readl addr=0x%08x val=0x%08x\n", addr, val);
#endif
@@ -1210,8 +1209,6 @@
pci_register_io_region((PCIDevice *)d, 1, PCNET_PNPMMIO_SIZE,
PCI_ADDRESS_SPACE_MEM, pcnet_mmio_map);
- d->poll_timer = qemu_new_timer(vm_clock, pcnet_poll_timer, d);
-
d->nd = nd;
pcnet_h_reset(d);
diff -r 8e1bfcb901e5 -r 32695e99cfc8 tools/ioemu/target-i386-dm/helper2.c
--- a/tools/ioemu/target-i386-dm/helper2.c Sun Oct 30 15:43:05 2005
+++ b/tools/ioemu/target-i386-dm/helper2.c Sun Oct 30 15:47:59 2005
@@ -387,12 +387,6 @@
}
}
-void
-cpu_timer_handler(CPUState *env)
-{
- cpu_handle_ioreq(env);
-}
-
int xc_handle;
static __inline__ void atomic_set_bit(long nr, volatile void *addr)
@@ -413,6 +407,8 @@
fprintf(logfile, "%s failed.!\n", destroy_cmd);
}
+fd_set wakeup_rfds;
+int highest_fds;
int main_loop(void)
{
fd_set rfds;
@@ -425,8 +421,9 @@
extern void main_loop_wait(int);
/* Watch stdin (fd 0) to see when it has input. */
- FD_ZERO(&rfds);
-
+ FD_ZERO(&wakeup_rfds);
+ FD_SET(evtchn_fd, &wakeup_rfds);
+ highest_fds = evtchn_fd;
while (1) {
if (vm_running) {
if (shutdown_requested) {
@@ -441,14 +438,16 @@
/* Wait up to one seconds. */
tv.tv_sec = 0;
tv.tv_usec = 100000;
- FD_SET(evtchn_fd, &rfds);
env->send_event = 0;
- retval = select(evtchn_fd+1, &rfds, NULL, NULL, &tv);
+ retval = select(highest_fds+1, &wakeup_rfds, NULL, NULL, &tv);
if (retval == -1) {
perror("select");
return 0;
}
+ rfds = wakeup_rfds;
+ FD_ZERO(&wakeup_rfds);
+ FD_SET(evtchn_fd, &wakeup_rfds);
#if __WORDSIZE == 32
#define ULONGLONG_MAX 0xffffffffffffffffULL
@@ -460,7 +459,10 @@
#ifdef APIC_SUPPORT
ioapic_update_EOI();
#endif
- cpu_timer_handler(env);
+ tun_receive_handler(&rfds);
+ if ( FD_ISSET(evtchn_fd, &rfds) ) {
+ cpu_handle_ioreq(env);
+ }
#ifdef APIC_SUPPORT
if (ioapic_has_intr())
do_ioapic();
diff -r 8e1bfcb901e5 -r 32695e99cfc8 tools/ioemu/vl.c
--- a/tools/ioemu/vl.c Sun Oct 30 15:43:05 2005
+++ b/tools/ioemu/vl.c Sun Oct 30 15:47:59 2005
@@ -1528,7 +1528,7 @@
IOCanRWHandler *fd_can_read,
IOReadHandler *fd_read, void *opaque)
{
- qemu_add_fd_read_handler(nd->fd, fd_can_read, fd_read, opaque);
+ qemu_add_fd_event_read_handler(nd->fd, fd_can_read, fd_read, opaque);
}
static int net_tun_init(NetDriverState *nd)
@@ -1536,11 +1536,13 @@
int pid, status;
char *args[3];
char **parg;
+ extern int highest_fds;
nd->fd = tun_open(nd->ifname, sizeof(nd->ifname));
if (nd->fd < 0)
return -1;
+ if ( nd->fd > highest_fds ) highest_fds = nd->fd;
/* try to launch network init script */
pid = fork();
if (pid >= 0) {
@@ -1628,6 +1630,7 @@
} IOHandlerRecord;
static IOHandlerRecord *first_io_handler;
+static IOHandlerRecord *first_eventio_handler;
int qemu_add_fd_read_handler(int fd, IOCanRWHandler *fd_can_read,
IOReadHandler *fd_read, void *opaque)
@@ -1643,6 +1646,23 @@
ioh->opaque = opaque;
ioh->next = first_io_handler;
first_io_handler = ioh;
+ return 0;
+}
+
+int qemu_add_fd_event_read_handler(int fd, IOCanRWHandler *fd_can_read,
+ IOReadHandler *fd_read, void *opaque)
+{
+ IOHandlerRecord *ioh;
+
+ ioh = qemu_mallocz(sizeof(IOHandlerRecord));
+ if (!ioh)
+ return -1;
+ ioh->fd = fd;
+ ioh->fd_can_read = fd_can_read;
+ ioh->fd_read = fd_read;
+ ioh->opaque = opaque;
+ ioh->next = first_eventio_handler;
+ first_eventio_handler = ioh;
return 0;
}
@@ -3257,3 +3277,44 @@
quit_timers();
return 0;
}
+
+extern fd_set wakeup_rfds;
+void tun_receive_handler(fd_set *rfds)
+{
+ IOHandlerRecord *ioh;
+ static uint8_t buf[4096];
+ int n, max_size;
+
+ for (ioh = first_eventio_handler; ioh != NULL; ioh = ioh->next) {
+ if ( FD_ISSET(ioh->fd, rfds) ) {
+ max_size = ioh->fd_can_read(ioh->opaque);
+ if (max_size > 0) {
+ if (max_size > sizeof(buf))
+ max_size = sizeof(buf);
+ n = read(ioh->fd, buf, max_size);
+ if (n >= 0) {
+ ioh->fd_read(ioh->opaque, buf, n);
+ }
+ }
+ }
+ }
+ update_select_wakeup_events();
+}
+
+void update_select_wakeup_events(void)
+{
+ IOHandlerRecord *ioh;
+ int max_size;
+
+ for(ioh = first_eventio_handler; ioh != NULL; ioh = ioh->next) {
+ FD_CLR(ioh->fd, &wakeup_rfds);
+ if (ioh->fd_can_read) {
+ max_size = ioh->fd_can_read(ioh->opaque);
+ if (max_size > 0) {
+ FD_SET(ioh->fd, &wakeup_rfds);
+ }
+ }
+ }
+}
+
+
diff -r 8e1bfcb901e5 -r 32695e99cfc8 tools/ioemu/vl.h
--- a/tools/ioemu/vl.h Sun Oct 30 15:43:05 2005
+++ b/tools/ioemu/vl.h Sun Oct 30 15:47:59 2005
@@ -178,6 +178,8 @@
int qemu_add_fd_read_handler(int fd, IOCanRWHandler *fd_can_read,
IOReadHandler *fd_read, void *opaque);
+int qemu_add_fd_event_read_handler(int fd, IOCanRWHandler *fd_can_read,
+ IOReadHandler *fd_read, void *opaque);
void qemu_del_fd_read_handler(int fd);
/* character device */
@@ -791,5 +793,7 @@
#define DEFAULT_GDBSTUB_PORT 1234
int gdbserver_start(int port);
+void update_select_wakeup_events(void);
+void tun_receive_handler();
#endif /* VL_H */
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