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changes to SimpleNIC interface

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This commit is contained in:
Howard Mao
2017-06-27 18:06:02 -07:00
parent b8456d2b4b
commit b662854750
2 changed files with 20 additions and 14 deletions
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2
testchipip

Submodule testchipip updated: f058ee11ad...0df970e8d1

32
tests/nic-loopback.c
View File

@@ -3,36 +3,42 @@
#include <stdio.h>
#define SIMPLENIC_BASE 0x10016000L
#define SIMPLENIC_SEND (SIMPLENIC_BASE + 0)
#define SIMPLENIC_RECV (SIMPLENIC_BASE + 8)
#define SIMPLENIC_COMP (SIMPLENIC_BASE + 16)
#define SIMPLENIC_COUNTS (SIMPLENIC_BASE + 18)
#define SIMPLENIC_SEND_REQ (SIMPLENIC_BASE + 0)
#define SIMPLENIC_RECV_REQ (SIMPLENIC_BASE + 8)
#define SIMPLENIC_SEND_COMP (SIMPLENIC_BASE + 16)
#define SIMPLENIC_RECV_COMP (SIMPLENIC_BASE + 18)
#define SIMPLENIC_COUNTS (SIMPLENIC_BASE + 20)
uint64_t src[200];
uint64_t dst[201];
static inline int nic_send_avail(void)
static inline int nic_send_req_avail(void)
{
return reg_read16(SIMPLENIC_COUNTS) & 0xf;
}
static inline int nic_recv_avail(void)
static inline int nic_recv_req_avail(void)
{
return (reg_read16(SIMPLENIC_COUNTS) >> 4) & 0xf;
}
static inline int nic_comp_avail(void)
static inline int nic_send_comp_avail(void)
{
return (reg_read16(SIMPLENIC_COUNTS) >> 8) & 0xf;
}
static inline int nic_recv_comp_avail(void)
{
return (reg_read16(SIMPLENIC_COUNTS) >> 12) & 0xf;
}
static void nic_send(void *data, unsigned long len)
{
uintptr_t addr = ((uintptr_t) data) & ((1L << 48) - 1);
unsigned long packet = (len << 48) | addr;
while (nic_send_avail() == 0);
reg_write64(SIMPLENIC_SEND, packet);
while (nic_send_req_avail() == 0);
reg_write64(SIMPLENIC_SEND_REQ, packet);
}
static int nic_recv(void *dest)
@@ -40,12 +46,12 @@ static int nic_recv(void *dest)
uintptr_t addr = (uintptr_t) dest;
int len;
while (nic_recv_avail() == 0);
reg_write64(SIMPLENIC_RECV, addr);
while (nic_recv_req_avail() == 0);
reg_write64(SIMPLENIC_RECV_REQ, addr);
// Poll for completion
while (nic_comp_avail() == 0);
len = reg_read16(SIMPLENIC_COMP);
while (nic_recv_comp_avail() == 0);
len = reg_read16(SIMPLENIC_RECV_COMP);
return len;
}