[PATCH v6 6/6] tests/qtest: Add pnv-spi-seeprom qtest

[Chalapathi V]

In this commit Write a qtest pnv-spi-seeprom-test to check the
SPI transactions between spi controller and seeprom device.

Signed-off-by: Chalapathi V <chalapathi.v@linux.ibm.com>
Acked-by: Cédric Le Goater <clg@redhat.com>
Reviewed-by: Caleb Schlossin <calebs@linux.vnet.ibm.com>
---
 tests/qtest/pnv-spi-seeprom-test.c | 110 +++++++++++++++++++++++++++++
 tests/qtest/meson.build            |   1 +
 2 files changed, 111 insertions(+)
 create mode 100644 tests/qtest/pnv-spi-seeprom-test.c

diff --git a/tests/qtest/pnv-spi-seeprom-test.c 
b/tests/qtest/pnv-spi-seeprom-test.c
new file mode 100644
index 0000000000..92bc8a11ae
--- /dev/null
+++ b/tests/qtest/pnv-spi-seeprom-test.c
@@ -0,0 +1,110 @@
+/*
+ * QTest testcase for PowerNV 10 Seeprom Communications
+ *
+ * Copyright (c) 2024, IBM Corporation.
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+#include <unistd.h>
+#include "qemu/osdep.h"
+#include "libqtest.h"
+#include "qemu/bswap.h"
+#include "hw/ssi/pnv_spi_regs.h"
+#include "pnv-xscom.h"
+
+#define FLASH_SIZE              (512 * 1024)
+#define SPIC2_XSCOM_BASE        0xc0040
+
+/* To transmit READ opcode and address */
+#define READ_OP_TDR_DATA        0x0300010000000000
+/*
+ * N1 shift - tx 4 bytes (transmit opcode and address)
+ * N2 shift - tx and rx 8 bytes.
+ */
+#define READ_OP_COUNTER_CONFIG  0x2040000000002b00
+/* SEQ_OP_SELECT_RESPONDER - N1 Shift - N2 Shift * 5 - SEQ_OP_STOP */
+#define READ_OP_SEQUENCER       0x1130404040404010
+
+/* To transmit WREN(Set Write Enable Latch in status0 register) opcode */
+#define WRITE_OP_WREN           0x0600000000000000
+/* To transmit WRITE opcode, address and data */
+#define WRITE_OP_TDR_DATA       0x0300010012345678
+/* N1 shift - tx 8 bytes (transmit opcode, address and data) */
+#define WRITE_OP_COUNTER_CONFIG 0x4000000000002000
+/* SEQ_OP_SELECT_RESPONDER - N1 Shift - SEQ_OP_STOP */
+#define WRITE_OP_SEQUENCER      0x1130100000000000
+
+static void pnv_spi_xscom_write(QTestState *qts, const PnvChip *chip,
+        uint32_t reg, uint64_t val)
+{
+    uint32_t pcba = SPIC2_XSCOM_BASE + reg;
+    qtest_writeq(qts, pnv_xscom_addr(chip, pcba), val);
+}
+
+static uint64_t pnv_spi_xscom_read(QTestState *qts, const PnvChip *chip,
+        uint32_t reg)
+{
+    uint32_t pcba = SPIC2_XSCOM_BASE + reg;
+    return qtest_readq(qts, pnv_xscom_addr(chip, pcba));
+}
+
+static void spi_seeprom_transaction(QTestState *qts, const PnvChip *chip)
+{
+    /* SPI transactions to SEEPROM to read from SEEPROM image */
+    pnv_spi_xscom_write(qts, chip, SPI_CTR_CFG_REG, READ_OP_COUNTER_CONFIG);
+    pnv_spi_xscom_write(qts, chip, SPI_SEQ_OP_REG, READ_OP_SEQUENCER);
+    pnv_spi_xscom_write(qts, chip, SPI_XMIT_DATA_REG, READ_OP_TDR_DATA);
+    pnv_spi_xscom_write(qts, chip, SPI_XMIT_DATA_REG, 0);
+    /* Read 5*8 bytes from SEEPROM at 0x100 */
+    uint64_t rdr_val = pnv_spi_xscom_read(qts, chip, SPI_RCV_DATA_REG);
+    g_test_message("RDR READ = 0x%lx", rdr_val);
+    rdr_val = pnv_spi_xscom_read(qts, chip, SPI_RCV_DATA_REG);
+    rdr_val = pnv_spi_xscom_read(qts, chip, SPI_RCV_DATA_REG);
+    rdr_val = pnv_spi_xscom_read(qts, chip, SPI_RCV_DATA_REG);
+    rdr_val = pnv_spi_xscom_read(qts, chip, SPI_RCV_DATA_REG);
+    g_test_message("RDR READ = 0x%lx", rdr_val);
+
+    /* SPI transactions to SEEPROM to write to SEEPROM image */
+    pnv_spi_xscom_write(qts, chip, SPI_CTR_CFG_REG, WRITE_OP_COUNTER_CONFIG);
+    /* Set Write Enable Latch bit of status0 register */
+    pnv_spi_xscom_write(qts, chip, SPI_SEQ_OP_REG, WRITE_OP_SEQUENCER);
+    pnv_spi_xscom_write(qts, chip, SPI_XMIT_DATA_REG, WRITE_OP_WREN);
+    /* write 8 bytes to SEEPROM at 0x100 */
+    pnv_spi_xscom_write(qts, chip, SPI_SEQ_OP_REG, WRITE_OP_SEQUENCER);
+    pnv_spi_xscom_write(qts, chip, SPI_XMIT_DATA_REG, WRITE_OP_TDR_DATA);
+}
+
+static void test_spi_seeprom(const void *data)
+{
+    const PnvChip *chip = data;
+    QTestState *qts = NULL;
+    g_autofree char *tmp_path = NULL;
+    int ret;
+    int fd;
+
+    /* Create a temporary raw image */
+    fd = g_file_open_tmp("qtest-seeprom-XXXXXX", &tmp_path, NULL);
+    g_assert(fd >= 0);
+    ret = ftruncate(fd, FLASH_SIZE);
+    g_assert(ret == 0);
+    close(fd);
+
+    qts = qtest_initf("-m 2G -machine powernv10 -smp 2,cores=2,"
+                      "threads=1 -accel tcg,thread=single -nographic "
+                      "-blockdev node-name=pib_spic2,driver=file,"
+                      "filename=%s -device 25csm04,bus=pnv-spi-bus.2,cs=0,"
+                      "drive=pib_spic2", tmp_path);
+    spi_seeprom_transaction(qts, chip);
+    qtest_quit(qts);
+    unlink(tmp_path);
+}
+
+int main(int argc, char **argv)
+{
+    g_test_init(&argc, &argv, NULL);
+    char *tname = g_strdup_printf("pnv-xscom/spi-seeprom/%s",
+            pnv_chips[3].cpu_model);
+    qtest_add_data_func(tname, &pnv_chips[3], test_spi_seeprom);
+    g_free(tname);
+    return g_test_run();
+}
diff --git a/tests/qtest/meson.build b/tests/qtest/meson.build
index 86293051dc..2fa98b2430 100644
--- a/tests/qtest/meson.build
+++ b/tests/qtest/meson.build
@@ -171,6 +171,7 @@ qtests_ppc64 = \
   qtests_ppc + \
   (config_all_devices.has_key('CONFIG_PSERIES') ? ['device-plug-test'] : []) + 
              \
   (config_all_devices.has_key('CONFIG_POWERNV') ? ['pnv-xscom-test'] : []) +   
              \
+  (config_all_devices.has_key('CONFIG_POWERNV') ? ['pnv-spi-seeprom-test'] : 
[]) +           \
   (config_all_devices.has_key('CONFIG_POWERNV') ? ['pnv-host-i2c-test'] : []) 
+              \
   (config_all_devices.has_key('CONFIG_PSERIES') ? ['rtas-test'] : []) +        
              \
   (slirp.found() ? ['pxe-test'] : []) +              \
-- 
2.39.3