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imx_fec: Use ENET_FTRL to determine truncation length 

Frame truncation length, TRUNC_FL, is determined by the contents of
ENET_FTRL register, so convert the code to use it instead of a
hardcoded constant.

To avoid the case where TRUNC_FL is greater that ENET_MAX_FRAME_SIZE,
increase the value of the latter to its theoretical maximum of 16K.

Cc: Peter Maydell <peter.maydell@linaro.org>
Cc: Jason Wang <jasowang@redhat.com>
Cc: Philippe Mathieu-Daudé <f4bug@amsat.org>
Cc: qemu-devel@nongnu.org
Cc: qemu-arm@nongnu.org
Cc: yurovsky@gmail.com
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
master
Andrey Smirnov 2018-01-11 13:25:36 +00:00 committed by Peter Maydell
parent 7bac20dc51
commit ff9a7feeab
2 changed files with 4 additions and 3 deletions
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4
hw/net/imx_fec.c
View File

@ -1052,8 +1052,8 @@ static ssize_t imx_enet_receive(NetClientState *nc, const uint8_t *buf,
crc_ptr = (uint8_t *) &crc;
/* Huge frames are truncted. */
if (size > ENET_MAX_FRAME_SIZE) {
size = ENET_MAX_FRAME_SIZE;
if (size > s->regs[ENET_FTRL]) {
size = s->regs[ENET_FTRL];
flags |= ENET_BD_TR | ENET_BD_LG;
}

3
include/hw/net/imx_fec.h
View File

@ -86,7 +86,6 @@
#define ENET_TCCR3 393
#define ENET_MAX 400
#define ENET_MAX_FRAME_SIZE 2032
/* EIR and EIMR */
#define ENET_INT_HB (1 << 31)
@ -155,6 +154,8 @@
#define ENET_RCR_NLC (1 << 30)
#define ENET_RCR_GRS (1 << 31)
#define ENET_MAX_FRAME_SIZE (1 << ENET_RCR_MAX_FL_LENGTH)
/* TCR */
#define ENET_TCR_GTS (1 << 0)
#define ENET_TCR_FDEN (1 << 2)