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net/npcm7xx_emc.c: Fix handling of receiving packets when RSDR not set 

Turning REG_MCMDR_RXON is enough to start receiving packets.

Signed-off-by: Doug Evans <dje@google.com>
Message-id: 20210319195044.741821-1-dje@google.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
master
Doug Evans 2021-03-30 14:05:33 +01:00 committed by Peter Maydell
parent 7993b0f83f
commit a62ee00aa0
2 changed files with 24 additions and 10 deletions
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4
hw/net/npcm7xx_emc.c
View File

@ -702,7 +702,9 @@ static void npcm7xx_emc_write(void *opaque, hwaddr offset,
!(value & REG_MCMDR_RXON)) {
emc->regs[REG_MGSTA] |= REG_MGSTA_RXHA;
}
if (!(value & REG_MCMDR_RXON)) {
if (value & REG_MCMDR_RXON) {
emc->rx_active = true;
} else {
emc_halt_rx(emc, 0);
}
break;

30
tests/qtest/npcm7xx_emc-test.c
View File

@ -492,9 +492,6 @@ static void enable_tx(QTestState *qts, const EMCModule *mod,
mcmdr |= REG_MCMDR_TXON;
emc_write(qts, mod, REG_MCMDR, mcmdr);
}
/* Prod the device to send the packet. */
emc_write(qts, mod, REG_TSDR, 1);
}
static void emc_send_verify1(QTestState *qts, const EMCModule *mod, int fd,
@ -558,6 +555,9 @@ static void emc_send_verify(QTestState *qts, const EMCModule *mod, int fd,
enable_tx(qts, mod, &desc[0], NUM_TX_DESCRIPTORS, desc_addr,
with_irq ? REG_MIEN_ENTXINTR : 0);
/* Prod the device to send the packet. */
emc_write(qts, mod, REG_TSDR, 1);
/*
* It's problematic to observe the interrupt for each packet.
* Instead just wait until all the packets go out.
@ -643,13 +643,10 @@ static void enable_rx(QTestState *qts, const EMCModule *mod,
mcmdr |= REG_MCMDR_RXON | mcmdr_flags;
emc_write(qts, mod, REG_MCMDR, mcmdr);
}
/* Prod the device to accept a packet. */
emc_write(qts, mod, REG_RSDR, 1);
}
static void emc_recv_verify(QTestState *qts, const EMCModule *mod, int fd,
bool with_irq)
bool with_irq, bool pump_rsdr)
{
NPCM7xxEMCRxDesc desc[NUM_RX_DESCRIPTORS];
uint32_t desc_addr = DESC_ADDR;
@ -679,6 +676,15 @@ static void emc_recv_verify(QTestState *qts, const EMCModule *mod, int fd,
enable_rx(qts, mod, &desc[0], NUM_RX_DESCRIPTORS, desc_addr,
with_irq ? REG_MIEN_ENRXINTR : 0, 0);
/*
* If requested, prod the device to accept a packet.
* This isn't necessary, the linux driver doesn't do this.
* Test doing/not-doing this for robustness.
*/
if (pump_rsdr) {
emc_write(qts, mod, REG_RSDR, 1);
}
/* Send test packet to device's socket. */
ret = iov_send(fd, iov, 2, 0, sizeof(len) + sizeof(test));
g_assert_cmpint(ret, == , sizeof(test) + sizeof(len));
@ -826,8 +832,14 @@ static void test_rx(gconstpointer test_data)
qtest_irq_intercept_in(qts, "/machine/soc/a9mpcore/gic");
emc_recv_verify(qts, td->module, test_sockets[0], /*with_irq=*/false);
emc_recv_verify(qts, td->module, test_sockets[0], /*with_irq=*/true);
emc_recv_verify(qts, td->module, test_sockets[0], /*with_irq=*/false,
/*pump_rsdr=*/false);
emc_recv_verify(qts, td->module, test_sockets[0], /*with_irq=*/false,
/*pump_rsdr=*/true);
emc_recv_verify(qts, td->module, test_sockets[0], /*with_irq=*/true,
/*pump_rsdr=*/false);
emc_recv_verify(qts, td->module, test_sockets[0], /*with_irq=*/true,
/*pump_rsdr=*/true);
emc_test_ptle(qts, td->module, test_sockets[0]);
qtest_quit(qts);