@@ -136,6 +136,7 @@ qtests_sparc64 = \
qtests_npcm7xx = \
['npcm7xx_adc-test',
+ 'npcm7xx_emc-test',
'npcm7xx_gpio-test',
'npcm7xx_pwm-test',
'npcm7xx_rng-test',
new file mode 100644
@@ -0,0 +1,862 @@
+/*
+ * QTests for Nuvoton NPCM7xx EMC Modules.
+ *
+ * Copyright 2020 Google LLC
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ */
+
+#include "qemu/osdep.h"
+#include "qemu-common.h"
+#include "libqos/libqos.h"
+#include "qapi/qmp/qdict.h"
+#include "qapi/qmp/qnum.h"
+#include "qemu/bitops.h"
+#include "qemu/iov.h"
+
+/* Name of the emc device. */
+#define TYPE_NPCM7XX_EMC "npcm7xx-emc"
+
+/* Timeout for various operations, in seconds. */
+#define TIMEOUT_SECONDS 10
+
+/* Address in memory of the descriptor. */
+#define DESC_ADDR (1 << 20) /* 1 MiB */
+
+/* Address in memory of the data packet. */
+#define DATA_ADDR (DESC_ADDR + 4096)
+
+#define CRC_LENGTH 4
+
+#define NUM_TX_DESCRIPTORS 3
+#define NUM_RX_DESCRIPTORS 2
+
+/* Size of tx,rx test buffers. */
+#define TX_DATA_LEN 64
+#define RX_DATA_LEN 64
+
+#define TX_STEP_COUNT 10000
+#define RX_STEP_COUNT 10000
+
+/* 32-bit register indices. */
+typedef enum NPCM7xxPWMRegister {
+ /* Control registers. */
+ REG_CAMCMR,
+ REG_CAMEN,
+
+ /* There are 16 CAMn[ML] registers. */
+ REG_CAMM_BASE,
+ REG_CAML_BASE,
+
+ REG_TXDLSA = 0x22,
+ REG_RXDLSA,
+ REG_MCMDR,
+ REG_MIID,
+ REG_MIIDA,
+ REG_FFTCR,
+ REG_TSDR,
+ REG_RSDR,
+ REG_DMARFC,
+ REG_MIEN,
+
+ /* Status registers. */
+ REG_MISTA,
+ REG_MGSTA,
+ REG_MPCNT,
+ REG_MRPC,
+ REG_MRPCC,
+ REG_MREPC,
+ REG_DMARFS,
+ REG_CTXDSA,
+ REG_CTXBSA,
+ REG_CRXDSA,
+ REG_CRXBSA,
+
+ NPCM7XX_NUM_EMC_REGS,
+} NPCM7xxPWMRegister;
+
+enum { NUM_CAMML_REGS = 16 };
+
+/* REG_CAMCMR fields */
+/* Enable CAM Compare */
+#define REG_CAMCMR_ECMP (1 << 4)
+/* Accept Unicast Packet */
+#define REG_CAMCMR_AUP (1 << 0)
+
+/* REG_MCMDR fields */
+/* Software Reset */
+#define REG_MCMDR_SWR (1 << 24)
+/* Frame Transmission On */
+#define REG_MCMDR_TXON (1 << 8)
+/* Accept Long Packet */
+#define REG_MCMDR_ALP (1 << 1)
+/* Frame Reception On */
+#define REG_MCMDR_RXON (1 << 0)
+
+/* REG_MIEN fields */
+/* Enable Transmit Completion Interrupt */
+#define REG_MIEN_ENTXCP (1 << 18)
+/* Enable Transmit Interrupt */
+#define REG_MIEN_ENTXINTR (1 << 16)
+/* Enable Receive Good Interrupt */
+#define REG_MIEN_ENRXGD (1 << 4)
+/* ENable Receive Interrupt */
+#define REG_MIEN_ENRXINTR (1 << 0)
+
+/* REG_MISTA fields */
+/* Transmit Bus Error Interrupt */
+#define REG_MISTA_TXBERR (1 << 24)
+/* Transmit Descriptor Unavailable Interrupt */
+#define REG_MISTA_TDU (1 << 23)
+/* Transmit Completion Interrupt */
+#define REG_MISTA_TXCP (1 << 18)
+/* Transmit Interrupt */
+#define REG_MISTA_TXINTR (1 << 16)
+/* Receive Bus Error Interrupt */
+#define REG_MISTA_RXBERR (1 << 11)
+/* Receive Descriptor Unavailable Interrupt */
+#define REG_MISTA_RDU (1 << 10)
+/* DMA Early Notification Interrupt */
+#define REG_MISTA_DENI (1 << 9)
+/* Maximum Frame Length Interrupt */
+#define REG_MISTA_DFOI (1 << 8)
+/* Receive Good Interrupt */
+#define REG_MISTA_RXGD (1 << 4)
+/* Packet Too Long Interrupt */
+#define REG_MISTA_PTLE (1 << 3)
+/* Receive Interrupt */
+#define REG_MISTA_RXINTR (1 << 0)
+
+typedef struct NPCM7xxEMCTxDesc NPCM7xxEMCTxDesc;
+typedef struct NPCM7xxEMCRxDesc NPCM7xxEMCRxDesc;
+
+struct NPCM7xxEMCTxDesc {
+ uint32_t flags;
+ uint32_t txbsa;
+ uint32_t status_and_length;
+ uint32_t ntxdsa;
+};
+
+struct NPCM7xxEMCRxDesc {
+ uint32_t status_and_length;
+ uint32_t rxbsa;
+ uint32_t reserved;
+ uint32_t nrxdsa;
+};
+
+/* NPCM7xxEMCTxDesc.flags values */
+/* Owner: 0 = cpu, 1 = emc */
+#define TX_DESC_FLAG_OWNER_MASK (1 << 31)
+/* Transmit interrupt enable */
+#define TX_DESC_FLAG_INTEN (1 << 2)
+
+/* NPCM7xxEMCTxDesc.status_and_length values */
+/* Transmission complete */
+#define TX_DESC_STATUS_TXCP (1 << 19)
+/* Transmit interrupt */
+#define TX_DESC_STATUS_TXINTR (1 << 16)
+
+/* NPCM7xxEMCRxDesc.status_and_length values */
+/* Owner: 0b00 = cpu, 0b10 = emc */
+#define RX_DESC_STATUS_OWNER_SHIFT 30
+#define RX_DESC_STATUS_OWNER_MASK 0xc0000000
+/* Frame Reception Complete */
+#define RX_DESC_STATUS_RXGD (1 << 20)
+/* Packet too long */
+#define RX_DESC_STATUS_PTLE (1 << 19)
+/* Receive Interrupt */
+#define RX_DESC_STATUS_RXINTR (1 << 16)
+
+#define RX_DESC_PKT_LEN(word) ((uint32_t) (word) & 0xffff)
+
+typedef struct EMCModule {
+ int rx_irq;
+ int tx_irq;
+ uint64_t base_addr;
+} EMCModule;
+
+typedef struct TestData {
+ const EMCModule *module;
+} TestData;
+
+static const EMCModule emc_module_list[] = {
+ {
+ .rx_irq = 15,
+ .tx_irq = 16,
+ .base_addr = 0xf0825000
+ },
+ {
+ .rx_irq = 114,
+ .tx_irq = 115,
+ .base_addr = 0xf0826000
+ }
+};
+
+/* Returns the index of the EMC module. */
+static int emc_module_index(const EMCModule *mod)
+{
+ ptrdiff_t diff = mod - emc_module_list;
+
+ g_assert_true(diff >= 0 && diff < ARRAY_SIZE(emc_module_list));
+
+ return diff;
+}
+
+static void packet_test_clear(void *sockets)
+{
+ int *test_sockets = sockets;
+
+ close(test_sockets[0]);
+ g_free(test_sockets);
+}
+
+static int *packet_test_init(int module_num, GString *cmd_line)
+{
+ int *test_sockets = g_new(int, 2);
+ int ret = socketpair(PF_UNIX, SOCK_STREAM, 0, test_sockets);
+ g_assert_cmpint(ret, != , -1);
+
+ /*
+ * KISS and use -nic. We specify two nics (both emc{0,1}) because there's
+ * currently no way to specify only emc1: The driver implicitly relies on
+ * emc[i] == nd_table[i].
+ */
+ if (module_num == 0) {
+ g_string_append_printf(cmd_line,
+ " -nic socket,fd=%d,model=" TYPE_NPCM7XX_EMC " "
+ " -nic user,model=" TYPE_NPCM7XX_EMC " ",
+ test_sockets[1]);
+ } else {
+ g_string_append_printf(cmd_line,
+ " -nic user,model=" TYPE_NPCM7XX_EMC " "
+ " -nic socket,fd=%d,model=" TYPE_NPCM7XX_EMC " ",
+ test_sockets[1]);
+ }
+
+ g_test_queue_destroy(packet_test_clear, test_sockets);
+ return test_sockets;
+}
+
+static uint32_t emc_read(QTestState *qts, const EMCModule *mod,
+ NPCM7xxPWMRegister regno)
+{
+ return qtest_readl(qts, mod->base_addr + regno * sizeof(uint32_t));
+}
+
+static void emc_write(QTestState *qts, const EMCModule *mod,
+ NPCM7xxPWMRegister regno, uint32_t value)
+{
+ qtest_writel(qts, mod->base_addr + regno * sizeof(uint32_t), value);
+}
+
+static void emc_read_tx_desc(QTestState *qts, uint32_t addr,
+ NPCM7xxEMCTxDesc *desc)
+{
+ qtest_memread(qts, addr, desc, sizeof(*desc));
+ desc->flags = le32_to_cpu(desc->flags);
+ desc->txbsa = le32_to_cpu(desc->txbsa);
+ desc->status_and_length = le32_to_cpu(desc->status_and_length);
+ desc->ntxdsa = le32_to_cpu(desc->ntxdsa);
+}
+
+static void emc_write_tx_desc(QTestState *qts, const NPCM7xxEMCTxDesc *desc,
+ uint32_t addr)
+{
+ NPCM7xxEMCTxDesc le_desc;
+
+ le_desc.flags = cpu_to_le32(desc->flags);
+ le_desc.txbsa = cpu_to_le32(desc->txbsa);
+ le_desc.status_and_length = cpu_to_le32(desc->status_and_length);
+ le_desc.ntxdsa = cpu_to_le32(desc->ntxdsa);
+ qtest_memwrite(qts, addr, &le_desc, sizeof(le_desc));
+}
+
+static void emc_read_rx_desc(QTestState *qts, uint32_t addr,
+ NPCM7xxEMCRxDesc *desc)
+{
+ qtest_memread(qts, addr, desc, sizeof(*desc));
+ desc->status_and_length = le32_to_cpu(desc->status_and_length);
+ desc->rxbsa = le32_to_cpu(desc->rxbsa);
+ desc->reserved = le32_to_cpu(desc->reserved);
+ desc->nrxdsa = le32_to_cpu(desc->nrxdsa);
+}
+
+static void emc_write_rx_desc(QTestState *qts, const NPCM7xxEMCRxDesc *desc,
+ uint32_t addr)
+{
+ NPCM7xxEMCRxDesc le_desc;
+
+ le_desc.status_and_length = cpu_to_le32(desc->status_and_length);
+ le_desc.rxbsa = cpu_to_le32(desc->rxbsa);
+ le_desc.reserved = cpu_to_le32(desc->reserved);
+ le_desc.nrxdsa = cpu_to_le32(desc->nrxdsa);
+ qtest_memwrite(qts, addr, &le_desc, sizeof(le_desc));
+}
+
+/*
+ * Reset the EMC module.
+ * The module must be reset before, e.g., TXDLSA,RXDLSA are changed.
+ */
+static bool emc_soft_reset(QTestState *qts, const EMCModule *mod)
+{
+ uint32_t val;
+ uint64_t end_time;
+
+ emc_write(qts, mod, REG_MCMDR, REG_MCMDR_SWR);
+
+ /*
+ * Wait for device to reset as the linux driver does.
+ * During reset the AHB reads 0 for all registers. So first wait for
+ * something that resets to non-zero, and then wait for SWR becoming 0.
+ */
+ end_time = g_get_monotonic_time() + TIMEOUT_SECONDS * G_TIME_SPAN_SECOND;
+
+ do {
+ qtest_clock_step(qts, 100);
+ val = emc_read(qts, mod, REG_FFTCR);
+ } while (val == 0 && g_get_monotonic_time() < end_time);
+ if (val != 0) {
+ do {
+ qtest_clock_step(qts, 100);
+ val = emc_read(qts, mod, REG_MCMDR);
+ if ((val & REG_MCMDR_SWR) == 0) {
+ /*
+ * N.B. The CAMs have been reset here, so macaddr matching of
+ * incoming packets will not work.
+ */
+ return true;
+ }
+ } while (g_get_monotonic_time() < end_time);
+ }
+
+ g_message("%s: Timeout expired", __func__);
+ return false;
+}
+
+/* Check emc registers are reset to default value. */
+static void test_init(gconstpointer test_data)
+{
+ const TestData *td = test_data;
+ const EMCModule *mod = td->module;
+ QTestState *qts = qtest_init("-machine quanta-gsj");
+ int i;
+
+#define CHECK_REG(regno, value) \
+ do { \
+ g_assert_cmphex(emc_read(qts, mod, (regno)), ==, (value)); \
+ } while (0)
+
+ CHECK_REG(REG_CAMCMR, 0);
+ CHECK_REG(REG_CAMEN, 0);
+ CHECK_REG(REG_TXDLSA, 0xfffffffc);
+ CHECK_REG(REG_RXDLSA, 0xfffffffc);
+ CHECK_REG(REG_MCMDR, 0);
+ CHECK_REG(REG_MIID, 0);
+ CHECK_REG(REG_MIIDA, 0x00900000);
+ CHECK_REG(REG_FFTCR, 0x0101);
+ CHECK_REG(REG_DMARFC, 0x0800);
+ CHECK_REG(REG_MIEN, 0);
+ CHECK_REG(REG_MISTA, 0);
+ CHECK_REG(REG_MGSTA, 0);
+ CHECK_REG(REG_MPCNT, 0x7fff);
+ CHECK_REG(REG_MRPC, 0);
+ CHECK_REG(REG_MRPCC, 0);
+ CHECK_REG(REG_MREPC, 0);
+ CHECK_REG(REG_DMARFS, 0);
+ CHECK_REG(REG_CTXDSA, 0);
+ CHECK_REG(REG_CTXBSA, 0);
+ CHECK_REG(REG_CRXDSA, 0);
+ CHECK_REG(REG_CRXBSA, 0);
+
+#undef CHECK_REG
+
+ for (i = 0; i < NUM_CAMML_REGS; ++i) {
+ g_assert_cmpuint(emc_read(qts, mod, REG_CAMM_BASE + i * 2), ==,
+ 0);
+ g_assert_cmpuint(emc_read(qts, mod, REG_CAML_BASE + i * 2), ==,
+ 0);
+ }
+
+ qtest_quit(qts);
+}
+
+static bool emc_wait_irq(QTestState *qts, const EMCModule *mod, int step,
+ bool is_tx)
+{
+ uint64_t end_time =
+ g_get_monotonic_time() + TIMEOUT_SECONDS * G_TIME_SPAN_SECOND;
+
+ do {
+ if (qtest_get_irq(qts, is_tx ? mod->tx_irq : mod->rx_irq)) {
+ return true;
+ }
+ qtest_clock_step(qts, step);
+ } while (g_get_monotonic_time() < end_time);
+
+ g_message("%s: Timeout expired", __func__);
+ return false;
+}
+
+static bool emc_wait_mista(QTestState *qts, const EMCModule *mod, int step,
+ uint32_t flag)
+{
+ uint64_t end_time =
+ g_get_monotonic_time() + TIMEOUT_SECONDS * G_TIME_SPAN_SECOND;
+
+ do {
+ uint32_t mista = emc_read(qts, mod, REG_MISTA);
+ if (mista & flag) {
+ return true;
+ }
+ qtest_clock_step(qts, step);
+ } while (g_get_monotonic_time() < end_time);
+
+ g_message("%s: Timeout expired", __func__);
+ return false;
+}
+
+static bool wait_socket_readable(int fd)
+{
+ fd_set read_fds;
+ struct timeval tv;
+ int rv;
+
+ FD_ZERO(&read_fds);
+ FD_SET(fd, &read_fds);
+ tv.tv_sec = TIMEOUT_SECONDS;
+ tv.tv_usec = 0;
+ rv = select(fd + 1, &read_fds, NULL, NULL, &tv);
+ if (rv == -1) {
+ perror("select");
+ } else if (rv == 0) {
+ g_message("%s: Timeout expired", __func__);
+ }
+ return rv == 1;
+}
+
+/* Initialize *desc (in host endian format). */
+static void init_tx_desc(NPCM7xxEMCTxDesc *desc, size_t count,
+ uint32_t desc_addr)
+{
+ g_assert(count >= 2);
+ memset(&desc[0], 0, sizeof(*desc) * count);
+ /* Leave the last one alone, owned by the cpu -> stops transmission. */
+ for (size_t i = 0; i < count - 1; ++i) {
+ desc[i].flags =
+ (TX_DESC_FLAG_OWNER_MASK | /* owner = 1: emc */
+ TX_DESC_FLAG_INTEN |
+ 0 | /* crc append = 0 */
+ 0 /* padding enable = 0 */);
+ desc[i].status_and_length =
+ (0 | /* collision count = 0 */
+ 0 | /* SQE = 0 */
+ 0 | /* PAU = 0 */
+ 0 | /* TXHA = 0 */
+ 0 | /* LC = 0 */
+ 0 | /* TXABT = 0 */
+ 0 | /* NCS = 0 */
+ 0 | /* EXDEF = 0 */
+ 0 | /* TXCP = 0 */
+ 0 | /* DEF = 0 */
+ 0 | /* TXINTR = 0 */
+ 0 /* length filled in later */);
+ desc[i].ntxdsa = desc_addr + (i + 1) * sizeof(*desc);
+ }
+}
+
+static void enable_tx(QTestState *qts, const EMCModule *mod,
+ const NPCM7xxEMCTxDesc *desc, size_t count,
+ uint32_t desc_addr, uint32_t mien_flags)
+{
+ /* Write the descriptors to guest memory. */
+ for (size_t i = 0; i < count; ++i) {
+ emc_write_tx_desc(qts, desc + i, desc_addr + i * sizeof(*desc));
+ }
+
+ /* Trigger sending the packet. */
+ /* The module must be reset before changing TXDLSA. */
+ g_assert(emc_soft_reset(qts, mod));
+ emc_write(qts, mod, REG_TXDLSA, desc_addr);
+ emc_write(qts, mod, REG_CTXDSA, ~0);
+ emc_write(qts, mod, REG_MIEN, REG_MIEN_ENTXCP | mien_flags);
+ {
+ uint32_t mcmdr = emc_read(qts, mod, REG_MCMDR);
+ 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,
+ bool with_irq, uint32_t desc_addr,
+ uint32_t next_desc_addr,
+ const char *test_data, int test_size)
+{
+ NPCM7xxEMCTxDesc result_desc;
+ uint32_t expected_mask, expected_value, recv_len;
+ int ret;
+ char buffer[TX_DATA_LEN];
+
+ g_assert(wait_socket_readable(fd));
+
+ /* Read the descriptor back. */
+ emc_read_tx_desc(qts, desc_addr, &result_desc);
+ /* Descriptor should be owned by cpu now. */
+ g_assert((result_desc.flags & TX_DESC_FLAG_OWNER_MASK) == 0);
+ /* Test the status bits, ignoring the length field. */
+ expected_mask = 0xffff << 16;
+ expected_value = TX_DESC_STATUS_TXCP;
+ if (with_irq) {
+ expected_value |= TX_DESC_STATUS_TXINTR;
+ }
+ g_assert_cmphex((result_desc.status_and_length & expected_mask), ==,
+ expected_value);
+
+ /* Check data sent to the backend. */
+ recv_len = ~0;
+ ret = qemu_recv(fd, &recv_len, sizeof(recv_len), MSG_DONTWAIT);
+ g_assert_cmpint(ret, == , sizeof(recv_len));
+
+ g_assert(wait_socket_readable(fd));
+ memset(buffer, 0xff, sizeof(buffer));
+ ret = qemu_recv(fd, buffer, test_size, MSG_DONTWAIT);
+ g_assert_cmpmem(buffer, ret, test_data, test_size);
+}
+
+static void emc_send_verify(QTestState *qts, const EMCModule *mod, int fd,
+ bool with_irq)
+{
+ NPCM7xxEMCTxDesc desc[NUM_TX_DESCRIPTORS];
+ uint32_t desc_addr = DESC_ADDR;
+ static const char test1_data[] = "TEST1";
+ static const char test2_data[] = "Testing 1 2 3 ...";
+ uint32_t data1_addr = DATA_ADDR;
+ uint32_t data2_addr = data1_addr + sizeof(test1_data);
+ bool got_tdu;
+ uint32_t end_desc_addr;
+
+ /* Prepare test data buffer. */
+ qtest_memwrite(qts, data1_addr, test1_data, sizeof(test1_data));
+ qtest_memwrite(qts, data2_addr, test2_data, sizeof(test2_data));
+
+ init_tx_desc(&desc[0], NUM_TX_DESCRIPTORS, desc_addr);
+ desc[0].txbsa = data1_addr;
+ desc[0].status_and_length |= sizeof(test1_data);
+ desc[1].txbsa = data2_addr;
+ desc[1].status_and_length |= sizeof(test2_data);
+
+ enable_tx(qts, mod, &desc[0], NUM_TX_DESCRIPTORS, desc_addr,
+ with_irq ? REG_MIEN_ENTXINTR : 0);
+
+ /*
+ * It's problematic to observe the interrupt for each packet.
+ * Instead just wait until all the packets go out.
+ */
+ got_tdu = false;
+ while (!got_tdu) {
+ if (with_irq) {
+ g_assert_true(emc_wait_irq(qts, mod, TX_STEP_COUNT,
+ /*is_tx=*/true));
+ } else {
+ g_assert_true(emc_wait_mista(qts, mod, TX_STEP_COUNT,
+ REG_MISTA_TXINTR));
+ }
+ got_tdu = !!(emc_read(qts, mod, REG_MISTA) & REG_MISTA_TDU);
+ /* If we don't have TDU yet, reset the interrupt. */
+ if (!got_tdu) {
+ emc_write(qts, mod, REG_MISTA,
+ emc_read(qts, mod, REG_MISTA) & 0xffff0000);
+ }
+ }
+
+ end_desc_addr = desc_addr + 2 * sizeof(desc[0]);
+ g_assert_cmphex(emc_read(qts, mod, REG_CTXDSA), ==, end_desc_addr);
+ g_assert_cmphex(emc_read(qts, mod, REG_MISTA), ==,
+ REG_MISTA_TXCP | REG_MISTA_TXINTR | REG_MISTA_TDU);
+
+ emc_send_verify1(qts, mod, fd, with_irq,
+ desc_addr, end_desc_addr,
+ test1_data, sizeof(test1_data));
+ emc_send_verify1(qts, mod, fd, with_irq,
+ desc_addr + sizeof(desc[0]), end_desc_addr,
+ test2_data, sizeof(test2_data));
+}
+
+/* Initialize *desc (in host endian format). */
+static void init_rx_desc(NPCM7xxEMCRxDesc *desc, size_t count,
+ uint32_t desc_addr, uint32_t data_addr)
+{
+ g_assert_true(count >= 2);
+ memset(desc, 0, sizeof(*desc) * count);
+ desc[0].rxbsa = data_addr;
+ desc[0].status_and_length =
+ (0b10 << RX_DESC_STATUS_OWNER_SHIFT | /* owner = 10: emc */
+ 0 | /* RP = 0 */
+ 0 | /* ALIE = 0 */
+ 0 | /* RXGD = 0 */
+ 0 | /* PTLE = 0 */
+ 0 | /* CRCE = 0 */
+ 0 | /* RXINTR = 0 */
+ 0 /* length (filled in later) */);
+ /* Leave the last one alone, owned by the cpu -> stops transmission. */
+ desc[0].nrxdsa = desc_addr + sizeof(*desc);
+}
+
+static void enable_rx(QTestState *qts, const EMCModule *mod,
+ const NPCM7xxEMCRxDesc *desc, size_t count,
+ uint32_t desc_addr, uint32_t mien_flags,
+ uint32_t mcmdr_flags)
+{
+ /*
+ * Write the descriptor to guest memory.
+ * FWIW, IWBN if the docs said the buffer needs to be at least DMARFC
+ * bytes.
+ */
+ for (size_t i = 0; i < count; ++i) {
+ emc_write_rx_desc(qts, desc + i, desc_addr + i * sizeof(*desc));
+ }
+
+ /* Trigger receiving the packet. */
+ /* The module must be reset before changing RXDLSA. */
+ g_assert(emc_soft_reset(qts, mod));
+ emc_write(qts, mod, REG_RXDLSA, desc_addr);
+ emc_write(qts, mod, REG_MIEN, REG_MIEN_ENRXGD | mien_flags);
+
+ /*
+ * We don't know what the device's macaddr is, so just accept all
+ * unicast packets (AUP).
+ */
+ emc_write(qts, mod, REG_CAMCMR, REG_CAMCMR_AUP);
+ emc_write(qts, mod, REG_CAMEN, 1 << 0);
+ {
+ uint32_t mcmdr = emc_read(qts, mod, REG_MCMDR);
+ 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)
+{
+ NPCM7xxEMCRxDesc desc[NUM_RX_DESCRIPTORS];
+ uint32_t desc_addr = DESC_ADDR;
+ uint32_t data_addr = DATA_ADDR;
+ int ret;
+ uint32_t expected_mask, expected_value;
+ NPCM7xxEMCRxDesc result_desc;
+
+ /* Prepare test data buffer. */
+ const char test[RX_DATA_LEN] = "TEST";
+ int len = htonl(sizeof(test));
+ const struct iovec iov[] = {
+ {
+ .iov_base = &len,
+ .iov_len = sizeof(len),
+ },{
+ .iov_base = (char *) test,
+ .iov_len = sizeof(test),
+ },
+ };
+
+ /*
+ * Reset the device BEFORE sending a test packet, otherwise the packet
+ * may get swallowed by an active device of an earlier test.
+ */
+ init_rx_desc(&desc[0], NUM_RX_DESCRIPTORS, desc_addr, data_addr);
+ enable_rx(qts, mod, &desc[0], NUM_RX_DESCRIPTORS, desc_addr,
+ with_irq ? REG_MIEN_ENRXINTR : 0, 0);
+
+ /* 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));
+
+ /* Wait for RX interrupt. */
+ if (with_irq) {
+ g_assert_true(emc_wait_irq(qts, mod, RX_STEP_COUNT, /*is_tx=*/false));
+ } else {
+ g_assert_true(emc_wait_mista(qts, mod, RX_STEP_COUNT, REG_MISTA_RXGD));
+ }
+
+ g_assert_cmphex(emc_read(qts, mod, REG_CRXDSA), ==,
+ desc_addr + sizeof(desc[0]));
+
+ expected_mask = 0xffff;
+ expected_value = (REG_MISTA_DENI |
+ REG_MISTA_RXGD |
+ REG_MISTA_RXINTR);
+ g_assert_cmphex((emc_read(qts, mod, REG_MISTA) & expected_mask),
+ ==, expected_value);
+
+ /* Read the descriptor back. */
+ emc_read_rx_desc(qts, desc_addr, &result_desc);
+ /* Descriptor should be owned by cpu now. */
+ g_assert((result_desc.status_and_length & RX_DESC_STATUS_OWNER_MASK) == 0);
+ /* Test the status bits, ignoring the length field. */
+ expected_mask = 0xffff << 16;
+ expected_value = RX_DESC_STATUS_RXGD;
+ if (with_irq) {
+ expected_value |= RX_DESC_STATUS_RXINTR;
+ }
+ g_assert_cmphex((result_desc.status_and_length & expected_mask), ==,
+ expected_value);
+ g_assert_cmpint(RX_DESC_PKT_LEN(result_desc.status_and_length), ==,
+ RX_DATA_LEN + CRC_LENGTH);
+
+ {
+ char buffer[RX_DATA_LEN];
+ qtest_memread(qts, data_addr, buffer, sizeof(buffer));
+ g_assert_cmpstr(buffer, == , "TEST");
+ }
+}
+
+static void emc_test_ptle(QTestState *qts, const EMCModule *mod, int fd)
+{
+ NPCM7xxEMCRxDesc desc[NUM_RX_DESCRIPTORS];
+ uint32_t desc_addr = DESC_ADDR;
+ uint32_t data_addr = DATA_ADDR;
+ int ret;
+ NPCM7xxEMCRxDesc result_desc;
+ uint32_t expected_mask, expected_value;
+
+ /* Prepare test data buffer. */
+#define PTLE_DATA_LEN 1600
+ char test_data[PTLE_DATA_LEN];
+ int len = htonl(sizeof(test_data));
+ const struct iovec iov[] = {
+ {
+ .iov_base = &len,
+ .iov_len = sizeof(len),
+ },{
+ .iov_base = (char *) test_data,
+ .iov_len = sizeof(test_data),
+ },
+ };
+ memset(test_data, 42, sizeof(test_data));
+
+ /*
+ * Reset the device BEFORE sending a test packet, otherwise the packet
+ * may get swallowed by an active device of an earlier test.
+ */
+ init_rx_desc(&desc[0], NUM_RX_DESCRIPTORS, desc_addr, data_addr);
+ enable_rx(qts, mod, &desc[0], NUM_RX_DESCRIPTORS, desc_addr,
+ REG_MIEN_ENRXINTR, REG_MCMDR_ALP);
+
+ /* Send test packet to device's socket. */
+ ret = iov_send(fd, iov, 2, 0, sizeof(len) + sizeof(test_data));
+ g_assert_cmpint(ret, == , sizeof(test_data) + sizeof(len));
+
+ /* Wait for RX interrupt. */
+ g_assert_true(emc_wait_irq(qts, mod, RX_STEP_COUNT, /*is_tx=*/false));
+
+ /* Read the descriptor back. */
+ emc_read_rx_desc(qts, desc_addr, &result_desc);
+ /* Descriptor should be owned by cpu now. */
+ g_assert((result_desc.status_and_length & RX_DESC_STATUS_OWNER_MASK) == 0);
+ /* Test the status bits, ignoring the length field. */
+ expected_mask = 0xffff << 16;
+ expected_value = (RX_DESC_STATUS_RXGD |
+ RX_DESC_STATUS_PTLE |
+ RX_DESC_STATUS_RXINTR);
+ g_assert_cmphex((result_desc.status_and_length & expected_mask), ==,
+ expected_value);
+ g_assert_cmpint(RX_DESC_PKT_LEN(result_desc.status_and_length), ==,
+ PTLE_DATA_LEN + CRC_LENGTH);
+
+ {
+ char buffer[PTLE_DATA_LEN];
+ qtest_memread(qts, data_addr, buffer, sizeof(buffer));
+ g_assert(memcmp(buffer, test_data, PTLE_DATA_LEN) == 0);
+ }
+}
+
+static void test_tx(gconstpointer test_data)
+{
+ const TestData *td = test_data;
+ GString *cmd_line = g_string_new("-machine quanta-gsj");
+ int *test_sockets = packet_test_init(emc_module_index(td->module),
+ cmd_line);
+ QTestState *qts = qtest_init(cmd_line->str);
+
+ /*
+ * TODO: For pedantic correctness test_sockets[0] should be closed after
+ * the fork and before the exec, but that will require some harness
+ * improvements.
+ */
+ close(test_sockets[1]);
+ /* Defensive programming */
+ test_sockets[1] = -1;
+
+ qtest_irq_intercept_in(qts, "/machine/soc/a9mpcore/gic");
+
+ emc_send_verify(qts, td->module, test_sockets[0], /*with_irq=*/false);
+ emc_send_verify(qts, td->module, test_sockets[0], /*with_irq=*/true);
+
+ qtest_quit(qts);
+}
+
+static void test_rx(gconstpointer test_data)
+{
+ const TestData *td = test_data;
+ GString *cmd_line = g_string_new("-machine quanta-gsj");
+ int *test_sockets = packet_test_init(emc_module_index(td->module),
+ cmd_line);
+ QTestState *qts = qtest_init(cmd_line->str);
+
+ /*
+ * TODO: For pedantic correctness test_sockets[0] should be closed after
+ * the fork and before the exec, but that will require some harness
+ * improvements.
+ */
+ close(test_sockets[1]);
+ /* Defensive programming */
+ test_sockets[1] = -1;
+
+ 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_test_ptle(qts, td->module, test_sockets[0]);
+
+ qtest_quit(qts);
+}
+
+static void emc_add_test(const char *name, const TestData* td,
+ GTestDataFunc fn)
+{
+ g_autofree char *full_name = g_strdup_printf(
+ "npcm7xx_emc/emc[%d]/%s", emc_module_index(td->module), name);
+ qtest_add_data_func(full_name, td, fn);
+}
+#define add_test(name, td) emc_add_test(#name, td, test_##name)
+
+int main(int argc, char **argv)
+{
+ TestData test_data_list[ARRAY_SIZE(emc_module_list)];
+
+ g_test_init(&argc, &argv, NULL);
+
+ for (int i = 0; i < ARRAY_SIZE(emc_module_list); ++i) {
+ TestData *td = &test_data_list[i];
+
+ td->module = &emc_module_list[i];
+
+ add_test(init, td);
+ add_test(tx, td);
+ add_test(rx, td);
+ }
+
+ return g_test_run();
+}