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#include <stdio.h>
#include <endian.h>
#include <unistd.h>
/* Our */
#include <drivers/r8169.h>
#include <drivers/driver_ops.h>
#include <mm_api.h>
typedef unsigned long dma_addr_t;
static void print_packet(unsigned char *buffer)
{
int i;
printf("%02x:%02x:%02x:%02x:%02x:%02x -> %02x:%02x:%02x:%02x:%02x:%02x [%04x]:",
buffer[6], buffer[7], buffer[8], buffer[9], buffer[10], buffer[11],
buffer[0], buffer[1], buffer[2], buffer[3], buffer[4], buffer[5],
be16toh(*((__u16*)(&buffer[12])))
);
for (i = 14; i < 32; i++) {
printf("%02x", buffer[i]);
}
}
static inline void rtl8169_mark_to_asic(struct RxDesc *desc, __u32 rx_buf_sz)
{
__u32 eor = le32_to_cpu(desc->opts1) & RingEnd;
/* Force memory writes to complete before releasing descriptor */
dma_wmb();
desc->opts1 = cpu_to_le32(DescOwn | eor | rx_buf_sz);
}
static inline void rtl8169_map_to_asic(struct RxDesc *desc, dma_addr_t mapping,
__u32 rx_buf_sz)
{
desc->addr = cpu_to_le64(mapping);
rtl8169_mark_to_asic(desc, rx_buf_sz);
}
static inline void rtl8169_mark_as_last_descriptor(struct RxDesc *desc)
{
desc->opts1 |= cpu_to_le32(RingEnd);
}
static int rtl8169_rx_fill(int device, void *rx_data, struct iomem data,
char *rx_buff[])
{
int i;
struct RxDesc *r8169_rxring = (struct RxDesc *) rx_data;
for (i = 0; i < NUM_RX_DESC; i++) {
rtl8169_map_to_asic(&r8169_rxring[i], data.iova + i * 2048, 2048);
rx_buff[i] = (char *)(data.vaddr + i * 2048);
}
rtl8169_mark_as_last_descriptor(&r8169_rxring[NUM_RX_DESC - 1]);
return 0;
}
void r8169_recv(void *rxring, char *rx_buff[])
{
int i = 0;
struct RxDesc *r8169_rxring = (struct RxDesc *)rxring;
while (1) {
if (i >= NUM_RX_DESC)
i = 0;
for (; i < NUM_RX_DESC; i++) {
__u32 status;
status = le32_to_cpu(r8169_rxring[i].opts1) & ~0; /// either ~(RxBOVF | RxFOVF) or ~0;
if (status & DescOwn) {
usleep(100*1000);
break;
}
/* This barrier is needed to keep us from reading
* any other fields out of the Rx descriptor until
* we know the status of DescOwn
*/
dma_rmb();
if (unlikely(status & RxRES)) {
printf("Rx ERROR. status = %08x\n",status);
/*
dev->stats.rx_errors++;
if (status & (RxRWT | RxRUNT))
dev->stats.rx_length_errors++;
if (status & RxCRC)
dev->stats.rx_crc_errors++;
if (status & RxFOVF) {
rtl_schedule_task(tp, RTL_FLAG_TASK_RESET_PENDING);
dev->stats.rx_fifo_errors++;
}
*/
if ((status & (RxRUNT | RxCRC)) &&
!(status & (RxRWT | RxFOVF))
/* && (dev->features & NETIF_F_RXALL) */
)
goto process_pkt;
} else {
//dma_addr_t addr;
int pkt_size;
process_pkt:
//addr = le64_to_cpu(r8169_rxring[i].addr);
if (1) // likely(!(dev->features & NETIF_F_RXFCS)))
pkt_size = (status & 0x00003fff) - 4;
else
pkt_size = status & 0x00003fff;
/*
* The driver does not support incoming fragmented
* frames. They are seen as a symptom of over-mtu
* sized frames.
*/
/*
if (unlikely(rtl8169_fragmented_frame(status))) {
dev->stats.rx_dropped++;
dev->stats.rx_length_errors++;
goto release_descriptor;
}
skb = rtl8169_try_rx_copy(tp->Rx_databuff[entry],
tp, pkt_size, addr);
if (!skb) {
dev->stats.rx_dropped++;
goto release_descriptor;
}
rtl8169_rx_csum(skb, status);
skb_put(skb, pkt_size);
skb->protocol = eth_type_trans(skb, dev);
rtl8169_rx_vlan_tag(desc, skb);
if (skb->pkt_type == PACKET_MULTICAST)
dev->stats.multicast++;
napi_gro_receive(&tp->napi, skb);
__u64_stats_update_begin(&tp->rx_stats.syncp);
tp->rx_stats.packets++;
tp->rx_stats.bytes += pkt_size;
__u64_stats_update_end(&tp->rx_stats.syncp);
*/
printf("desc[%03d]: size= %5d ", i, pkt_size);
print_packet((unsigned char *)rx_buff[i]);
printf("\n");
}
/* release_descriptor: */
r8169_rxring[i].opts2 = 0;
rtl8169_mark_to_asic(&r8169_rxring[i], 2048);
}
}
}
/* FIXME make this staic once we have loadbale module support */
const struct driver_ops r8169_ops = {
/* endianess for vendor/id? */
.vendor = 0x10ec,
.device = 0x8168,
.vfio_quirks = NULL,
.rx_fill = rtl8169_rx_fill,
.tx_fill= NULL,
.recv = r8169_recv,
.xmit = NULL,
};
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