* [PATCH v2 1/3] hw/dma: Add STM32 platfrom DMA controller emulation
2025-05-23 11:36 [PATCH v2 0/3] Add STM32 DMA model Nikita Shubin
@ 2025-05-23 11:36 ` Nikita Shubin
2025-05-23 11:36 ` [PATCH v2 2/3] hw/arm/stm32f100: Add DMA support for stm32f100 Nikita Shubin
2025-05-23 11:36 ` [PATCH v2 3/3] tests/qtest: add qtests for STM32 DMA Nikita Shubin
2 siblings, 0 replies; 5+ messages in thread
From: Nikita Shubin @ 2025-05-23 11:36 UTC (permalink / raw)
To: qemu-devel
Cc: Paolo Bonzini, Alistair Francis, Peter Maydell, qemu-arm,
Alexandre Iooss, Fabiano Rosas, Laurent Vivier, Ilya Chichkov,
Nikita Shubin
From: Nikita Shubin <n.shubin@yadro.com>
STMicroelectronics STM32 SoCs integrate DMA engine that supports:
* Independent concurrent DMA transfers using 7/5 DMA channels
* Generation of interrupts on various conditions during execution
* PERIPH to MEMORY transactions, invoked by peripheral device models
* MEMORY to MEMORY transactions, invoked by software
This model is compatible with STM32F1xxxx and GD32F30x.
Co-developed-by: Ilya Chichkov <i.chichkov@yadro.com>
Signed-off-by: Ilya Chichkov <i.chichkov@yadro.com>
Signed-off-by: Nikita Shubin <n.shubin@yadro.com>
---
hw/dma/Kconfig | 4 +
hw/dma/meson.build | 1 +
hw/dma/stm32_dma.c | 566 +++++++++++++++++++++++++++++++++++++
hw/dma/trace-events | 15 +
include/hw/dma/stm32_dma.h | 46 +++
5 files changed, 632 insertions(+)
create mode 100644 hw/dma/stm32_dma.c
create mode 100644 include/hw/dma/stm32_dma.h
diff --git a/hw/dma/Kconfig b/hw/dma/Kconfig
index 98fbb1bb04..f1483a1ce5 100644
--- a/hw/dma/Kconfig
+++ b/hw/dma/Kconfig
@@ -30,3 +30,7 @@ config SIFIVE_PDMA
config XLNX_CSU_DMA
bool
select REGISTER
+
+config STM32_DMA
+ bool
+ select REGISTER
\ No newline at end of file
diff --git a/hw/dma/meson.build b/hw/dma/meson.build
index cc7810beb8..4db1aca955 100644
--- a/hw/dma/meson.build
+++ b/hw/dma/meson.build
@@ -12,3 +12,4 @@ system_ss.add(when: 'CONFIG_OMAP', if_true: files('omap_dma.c', 'soc_dma.c'))
system_ss.add(when: 'CONFIG_RASPI', if_true: files('bcm2835_dma.c'))
system_ss.add(when: 'CONFIG_SIFIVE_PDMA', if_true: files('sifive_pdma.c'))
system_ss.add(when: 'CONFIG_XLNX_CSU_DMA', if_true: files('xlnx_csu_dma.c'))
+system_ss.add(when: 'CONFIG_STM32_DMA', if_true: files('stm32_dma.c'))
diff --git a/hw/dma/stm32_dma.c b/hw/dma/stm32_dma.c
new file mode 100644
index 0000000000..48ad93cf36
--- /dev/null
+++ b/hw/dma/stm32_dma.c
@@ -0,0 +1,566 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * QEMU STM32 Direct memory access controller (DMA).
+ *
+ * This includes STM32F1xxxx, STM32F2xxxx and GD32F303x
+ *
+ * Author: 2025 Nikita Shubin <n.shubin@yadro.com>
+ */
+#include "qemu/osdep.h"
+
+#include "qapi/error.h"
+#include "hw/qdev-properties.h"
+#include "hw/qdev-properties-system.h"
+#include "hw/sysbus.h"
+#include "migration/vmstate.h"
+#include "hw/irq.h"
+#include "qemu/error-report.h"
+#include "qemu/log.h"
+#include "qemu/module.h"
+#include "hw/register.h"
+#include "system/dma.h"
+
+#include "trace.h"
+
+#include "hw/dma/stm32_dma.h"
+
+#define STM32_DMA_APERTURE_SIZE 0x400
+
+/* Global interrupt flag */
+#define DMA_ISR_GIF BIT(0)
+/* Full transfer finish */
+#define DMA_ISR_TCIF BIT(1)
+/* Half transfer finish */
+#define DMA_ISR_HTIF BIT(2)
+/* Transfer error */
+#define DMA_ISR_TEIF BIT(3)
+
+/* Interrupt flag register (DMA_ISR) */
+REG32(DMA_ISR, 0x00)
+ FIELD(DMA_ISR, CHAN0, 0, 4)
+ FIELD(DMA_ISR, CHAN1, 4, 4)
+ FIELD(DMA_ISR, CHAN2, 8, 4)
+ FIELD(DMA_ISR, CHAN3, 12, 4)
+ FIELD(DMA_ISR, CHAN4, 16, 4)
+ FIELD(DMA_ISR, CHAN5, 20, 4)
+ FIELD(DMA_ISR, CHAN6, 24, 4)
+ FIELD(DMA_ISR, RSVD, 28, 4)
+
+/* Interrupt flag clear register (DMA_IFCR) */
+REG32(DMA_IFCR, 0x04)
+ FIELD(DMA_IFCR, CHAN0, 0, 4)
+ FIELD(DMA_IFCR, CHAN1, 4, 4)
+ FIELD(DMA_IFCR, CHAN2, 8, 4)
+ FIELD(DMA_IFCR, CHAN3, 12, 4)
+ FIELD(DMA_IFCR, CHAN4, 16, 4)
+ FIELD(DMA_IFCR, CHAN5, 20, 4)
+ FIELD(DMA_IFCR, CHAN6, 24, 4)
+ FIELD(DMA_IFCR, RSVD, 28, 4)
+
+/* Channel x control register (DMA_CCRx) */
+/* Address offset: 0x08 + 0x14 * x */
+REG32(DMA_CCR, 0x08)
+ FIELD(DMA_CCR, EN, 0, 1)
+ FIELD(DMA_CCR, TCIE, 1, 1)
+ FIELD(DMA_CCR, HTIE, 2, 1)
+ FIELD(DMA_CCR, TEIE, 3, 1)
+
+ /* all below RO if chan enabled */
+ FIELD(DMA_CCR, DIR, 4, 1)
+ FIELD(DMA_CCR, CIRC, 5, 1)
+ FIELD(DMA_CCR, PINC, 6, 1)
+ FIELD(DMA_CCR, MINC, 7, 1)
+ FIELD(DMA_CCR, PSIZE, 8, 2)
+ FIELD(DMA_CCR, MSIZE, 10, 2)
+ FIELD(DMA_CCR, PL, 12, 2)
+ FIELD(DMA_CCR, M2M, 14, 1)
+ FIELD(DMA_CCR, RSVD, 15, 17)
+
+#define DMA_CCR_RO_MASK \
+ (R_DMA_CCR_DIR_MASK \
+ | R_DMA_CCR_CIRC_MASK \
+ | R_DMA_CCR_PINC_MASK \
+ | R_DMA_CCR_MINC_MASK \
+ | R_DMA_CCR_PSIZE_MASK \
+ | R_DMA_CCR_MSIZE_MASK \
+ | R_DMA_CCR_PL_MASK \
+ | R_DMA_CCR_M2M_MASK)
+
+/* Channel x counter register (DMA_CNDTRx) */
+/* Address offset: 0x0C + 0x14 * x */
+REG32(DMA_CNDTR, 0x0c)
+ FIELD(DMA_CNDTR, NDT, 0, 16)
+ FIELD(DMA_CNDTR, RSVD, 16, 16)
+
+/* Channel x peripheral base address register (DMA_CPARx) */
+/* Address offset: 0x10 + 0x14 * x */
+REG32(DMA_CPAR, 0x10)
+ FIELD(DMA_CPAR, PA, 0, 32)
+
+/* Channel x memory base address register (DMA_CMARx) */
+/* 0x14 + 0x14 * x */
+REG32(DMA_CMAR, 0x14)
+ FIELD(DMA_CMAR, MA, 0, 32)
+
+#define A_DMA_CCR0 0x08
+#define A_DMA_CMAR7 0xa0
+
+static void stm32_dma_chan_update_intr(STM32DmaState *s, uint8_t idx)
+{
+ /* check TCIF, HTIF, TEIF*/
+ uint32_t flags = extract32(s->intf, idx * 4 + 1, 3);
+ /* check TCIE, HTIE, TEIE*/
+ uint32_t ien = extract32(s->chan[idx].chctl, 1, 3);
+
+ if (flags & ien) {
+ /* set GIFCx */
+ set_bit32(idx * 4, &s->intf);
+ qemu_irq_raise(s->output[idx]);
+ }
+}
+
+static MemTxResult stm32_dma_transfer_one(STM32DmaState *s, uint8_t idx)
+{
+ STM32DmaChannel *chan = &s->chan[idx];
+ uint8_t pwidth = 1 << FIELD_EX32(chan->chctl, DMA_CCR, PSIZE);
+ uint8_t mwidth = 1 << FIELD_EX32(chan->chctl, DMA_CCR, MSIZE);
+ hwaddr paddr, maddr;
+ MemTxResult res = MEMTX_OK;
+ uint32_t data = 0;
+
+ paddr = chan->chpaddr;
+ if (FIELD_EX32(chan->chctl, DMA_CCR, PINC)) {
+ /* increment algorithm enabled */
+ uint32_t incr = chan->chcnt_shadow - chan->chcnt;
+
+ paddr += pwidth * incr;
+ }
+
+ maddr = chan->chmaddr;
+ if (FIELD_EX32(chan->chctl, DMA_CCR, MINC)) {
+ /* increment algorithm enabled */
+ uint32_t incr = chan->chcnt_shadow - chan->chcnt;
+
+ maddr += mwidth * incr;
+ }
+
+ /* issue transaction */
+ if (FIELD_EX32(chan->chctl, DMA_CCR, DIR)) {
+ /* FROM memory TO peripheral */
+ res = dma_memory_read(&address_space_memory, maddr, &data,
+ pwidth, MEMTXATTRS_UNSPECIFIED);
+ if (res) {
+ goto fail_rw;
+ }
+
+ res = dma_memory_write(&address_space_memory, paddr, &data,
+ mwidth, MEMTXATTRS_UNSPECIFIED);
+ if (res) {
+ goto fail_rw;
+ }
+
+ trace_stm32_dma_transfer(idx, maddr, mwidth,
+ paddr, pwidth, data);
+ } else {
+ /* FROM peripheral TO memory */
+ res = dma_memory_read(&address_space_memory, paddr, &data,
+ pwidth, MEMTXATTRS_UNSPECIFIED);
+ if (res) {
+ goto fail_rw;
+ }
+
+ res = dma_memory_write(&address_space_memory, maddr, &data,
+ mwidth, MEMTXATTRS_UNSPECIFIED);
+ if (res) {
+ goto fail_rw;
+ }
+
+ trace_stm32_dma_transfer(idx, paddr, pwidth,
+ maddr, mwidth, data);
+ }
+
+ /* Issue completed half transfer interrupt */
+ trace_stm32_dma_raise(idx, "HTIE");
+ set_bit(idx * 4 + 2, (unsigned long *)&s->intf);
+
+ return res;
+
+fail_rw:
+ /* Issue transfer error interrupt */
+ trace_stm32_dma_raise(idx, "TEIE");
+ set_bit(idx * 4 + 3, (unsigned long *)&s->intf);
+ trace_stm32_dma_transfer_fail(idx, paddr, maddr);
+
+ return res;
+}
+
+static void stm32_dma_transfer(STM32DmaState *s, uint8_t idx, bool m2m)
+{
+ STM32DmaChannel *chan = &s->chan[idx];
+ MemTxResult res = 0;
+
+ if (!chan->enabled || chan->chcnt == 0) {
+ trace_stm32_dma_disabled(idx, chan->enabled, chan->chcnt);
+ return;
+ }
+
+ do {
+ res = stm32_dma_transfer_one(s, idx);
+ if (res) {
+ goto fail_rw;
+ }
+
+ chan->chcnt--;
+ } while (chan->chcnt && m2m);
+
+ /* rearm counter */
+ if (chan->chcnt == 0) {
+ /* Issue completed full transfer interrupt */
+ trace_stm32_dma_raise(idx, "TCIE");
+ set_bit(idx * 4 + 1, (unsigned long *)&s->intf);
+
+ /* M2M mode can't be circular */
+ if (!FIELD_EX32(chan->chctl, DMA_CCR, M2M) &&
+ FIELD_EX32(chan->chctl, DMA_CCR, CIRC)) {
+ chan->chcnt = chan->chcnt_shadow;
+ trace_stm32_dma_cmen(idx, chan->chcnt);
+ }
+ }
+
+fail_rw:
+ stm32_dma_chan_update_intr(s, idx);
+ return;
+}
+
+static uint32_t stm32_dma_chan_read(STM32DmaState *s, hwaddr addr)
+{
+ uint8_t idx = (addr - A_DMA_CCR0) / 0x14 /* STRIDE */;
+ uint8_t reg = (addr - 0x14 /* STRIDE */ * idx);
+ uint32_t val = 0;
+
+ if (idx > s->nr_chans) {
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "%s: chan_idx %d exceed %d number of channels\n",
+ __func__, idx, s->nr_chans);
+ return val;
+ }
+
+ switch (reg) {
+ case A_DMA_CCR:
+ val = s->chan[idx].chctl;
+ break;
+ case A_DMA_CNDTR:
+ val = s->chan[idx].chcnt;
+ break;
+ case A_DMA_CPAR:
+ val = s->chan[idx].chpaddr;
+ break;
+ case A_DMA_CMAR:
+ val = s->chan[idx].chmaddr;
+ break;
+ default:
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "%s: unknown reg 0x%x\n",
+ __func__, reg);
+ break;
+ }
+
+ trace_stm32_dma_chan_read(addr, idx, reg, val);
+
+ return val;
+}
+
+static uint64_t stm32_dma_read(void *opaque, hwaddr addr, unsigned int size)
+{
+ STM32DmaState *s = STM32_DMA(opaque);
+ uint32_t val = 0;
+
+ switch (addr) {
+ case A_DMA_ISR:
+ val = s->intf;
+ break;
+ case A_DMA_CCR0 ... A_DMA_CMAR7:
+ val = stm32_dma_chan_read(s, addr);
+ break;
+ /* write-only */
+ case A_DMA_IFCR:
+ default:
+ /*
+ * TODO: WARN_ONCE ? If left as is produces spam, because many
+ * people use '|=' on write-only registers.
+ * qemu_log_mask(LOG_GUEST_ERROR,
+ * "%s: read to unimplemented register " \
+ * "at address: 0x%" PRIx64 " size %d\n",
+ * __func__, addr, size);
+ */
+ break;
+ };
+
+ trace_stm32_dma_read(addr);
+
+ return val;
+}
+
+static void stm32_dma_update_chan_ctrl(STM32DmaState *s, uint8_t idx,
+ uint32_t val)
+{
+ int is_enabled, was_enabled;
+
+ was_enabled = !!FIELD_EX32(s->chan[idx].chctl, DMA_CCR, EN);
+ is_enabled = !!FIELD_EX32(val, DMA_CCR, EN);
+
+ if (was_enabled && is_enabled) {
+ uint32_t protected = (s->chan[idx].chctl ^ val) & DMA_CCR_RO_MASK;
+ if (protected) {
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "%s: attempt to write enabled chan_idx %d settings "
+ "with val 0x%x\n", __func__, idx, val);
+ }
+
+ val &= ~DMA_CCR_RO_MASK;
+ val |= DMA_CCR_RO_MASK & s->chan[idx].chctl;
+ }
+
+ s->chan[idx].chctl = val;
+ s->chan[idx].enabled = !!FIELD_EX32(s->chan[idx].chctl, DMA_CCR, EN);
+
+ if (!was_enabled && is_enabled) {
+ /* clear flags */
+ s->intf = deposit32(s->intf, idx * 4, 4, 0);
+ if (FIELD_EX32(s->chan[idx].chctl, DMA_CCR, M2M)) {
+ stm32_dma_transfer(s, idx, true);
+ }
+ }
+}
+
+static void stm32_dma_chan_write(STM32DmaState *s, hwaddr addr,
+ uint64_t val)
+{
+ uint8_t idx = (addr - A_DMA_CCR0) / 0x14 /* STRIDE */;
+ uint8_t reg = (addr - 0x14 /* STRIDE */ * idx);
+
+ if (idx > s->nr_chans) {
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "%s: chan_idx %d exceed %d number of channels\n",
+ __func__, idx, s->nr_chans);
+ return;
+ }
+
+ trace_stm32_dma_chan_write(addr, idx, reg, val);
+
+ if (reg == A_DMA_CCR) {
+ stm32_dma_update_chan_ctrl(s, idx, val);
+ return;
+ }
+
+ if (s->chan[idx].enabled) {
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "%s: attempt to changed enabled chan_idx %d settings\n",
+ __func__, idx);
+ return;
+ }
+
+ switch (reg) {
+ case A_DMA_CNDTR:
+ s->chan[idx].chcnt = FIELD_EX32(val, DMA_CNDTR, NDT);
+ s->chan[idx].chcnt_shadow = s->chan[idx].chcnt;
+ break;
+ case A_DMA_CPAR:
+ s->chan[idx].chpaddr = val;
+ break;
+ case A_DMA_CMAR:
+ s->chan[idx].chmaddr = val;
+ break;
+ default:
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "%s: unknown reg 0x%x\n",
+ __func__, reg);
+ break;
+ }
+}
+
+static void stm32_dma_intr_ack(STM32DmaState *s, uint32_t val)
+{
+ int i, j;
+ uint32_t changed = val & s->intf;
+
+ if (!changed) {
+ return;
+ }
+
+ for (i = 0, j = 0; i < R_DMA_IFCR_RSVD_SHIFT; i += 4, j++) {
+ uint8_t bits_changed = extract32(changed, i, 4);
+ if (bits_changed) {
+ /* clear bits */
+ uint8_t bits = 0;
+
+ /* Clear global interrupt flag of channel */
+ if (!(bits_changed & BIT(0))) {
+ bits = extract32(s->intf, i, 4) & ~bits_changed;
+ }
+
+ s->intf = deposit32(s->intf, i , 4, bits);
+ if (!bits) {
+ trace_stm32_dma_lower(j);
+ qemu_irq_lower(s->output[j]);
+ }
+ }
+ }
+}
+
+static void stm32_dma_write(void *opaque, hwaddr addr,
+ uint64_t val, unsigned int size)
+{
+ STM32DmaState *s = STM32_DMA(opaque);
+
+ switch (addr) {
+ case A_DMA_IFCR:
+ stm32_dma_intr_ack(s, val);
+ break;
+ case A_DMA_CCR0 ... A_DMA_CMAR7:
+ stm32_dma_chan_write(s, addr, val);
+ break;
+ /* read-only */
+ case A_DMA_ISR:
+ default:
+ qemu_log_mask(LOG_GUEST_ERROR, "%s: write to unimplemented register " \
+ "at address: 0x%" PRIx64 " size=%d val=0x%" PRIx64 "\n",
+ __func__, addr, size, val);
+ break;
+ };
+
+ trace_stm32_dma_write(addr, val);
+}
+
+static const MemoryRegionOps dma_ops = {
+ .read = stm32_dma_read,
+ .write = stm32_dma_write,
+ .endianness = DEVICE_LITTLE_ENDIAN,
+ .impl = {
+ .min_access_size = 4,
+ .max_access_size = 4,
+ },
+};
+
+static void stm32_dma_reset_enter(Object *obj, ResetType type)
+{
+ STM32DmaState *s = STM32_DMA(obj);
+
+ s->intf = 0x0;
+
+ for (int i = 0; i < s->nr_chans; i++) {
+ s->chan[i].chctl = 0;
+ s->chan[i].chcnt = 0;
+ s->chan[i].chpaddr = 0;
+ s->chan[i].chmaddr = 0;
+
+ s->chan[i].enabled = false;
+ }
+
+ trace_stm32_dma_reset("reset_enter");
+}
+
+static void stm32_dma_reset_hold(Object *obj, ResetType type)
+{
+ STM32DmaState *s = STM32_DMA(obj);
+
+ for (int i = 0; i < s->nr_chans; i++) {
+ qemu_irq_lower(s->output[i]);
+ }
+
+ trace_stm32_dma_reset("reset_hold");
+}
+
+/* irq from peripheral */
+static void stm32_dma_set(void *opaque, int line, int value)
+{
+ STM32DmaState *s = STM32_DMA(opaque);
+
+ if (line > s->nr_chans) {
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "%s: requested non-existant line %d > %d\n",
+ __func__, line, s->nr_chans);
+ return;
+ }
+
+ /* start dma transfer */
+ stm32_dma_transfer(s, line, false);
+
+ trace_stm32_dma_set(line, value);
+}
+
+static void stm32_dma_realize(DeviceState *dev, Error **errp)
+{
+ STM32DmaState *s = STM32_DMA(dev);
+
+ memory_region_init_io(&s->mmio, OBJECT(dev), &dma_ops, s,
+ TYPE_STM32_DMA, STM32_DMA_APERTURE_SIZE);
+
+ sysbus_init_mmio(SYS_BUS_DEVICE(dev), &s->mmio);
+
+ qdev_init_gpio_in(DEVICE(s), stm32_dma_set, s->nr_chans);
+ for (int i = 0; i < s->nr_chans; i++) {
+ sysbus_init_irq(SYS_BUS_DEVICE(dev), &s->output[i]);
+ }
+}
+
+static const VMStateDescription vmstate_stm32_dma_channel = {
+ .name = "stm32_dma_channel",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .fields = (const VMStateField[]) {
+ VMSTATE_BOOL(enabled, STM32DmaChannel),
+ VMSTATE_UINT32(chctl, STM32DmaChannel),
+ VMSTATE_UINT32(chcnt, STM32DmaChannel),
+ VMSTATE_UINT32(chpaddr, STM32DmaChannel),
+ VMSTATE_UINT32(chmaddr, STM32DmaChannel),
+ VMSTATE_UINT32(chcnt_shadow, STM32DmaChannel),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+static const VMStateDescription vmstate_stm32_dma = {
+ .name = TYPE_STM32_DMA,
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .fields = (const VMStateField[]) {
+ VMSTATE_UINT8(nr_chans, STM32DmaState),
+ VMSTATE_UINT32(intf, STM32DmaState),
+ VMSTATE_STRUCT_ARRAY(chan, STM32DmaState, STM32_DMA_CHAN_NUMBER,
+ 1, vmstate_stm32_dma_channel, STM32DmaChannel),
+ VMSTATE_END_OF_LIST(),
+ }
+};
+
+static const Property stm32_dma_properties[] = {
+ DEFINE_PROP_UINT8("nchans", STM32DmaState, nr_chans, STM32_DMA_CHAN_NUMBER),
+};
+
+static void stm32_dma_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ ResettableClass *rc = RESETTABLE_CLASS(klass);
+
+ rc->phases.enter = stm32_dma_reset_enter;
+ rc->phases.hold = stm32_dma_reset_hold;
+
+ dc->vmsd = &vmstate_stm32_dma;
+ dc->realize = stm32_dma_realize;
+ dc->desc = "STM32 DMA";
+
+ device_class_set_props(dc, stm32_dma_properties);
+}
+
+static const TypeInfo stm32_dma_info = {
+ .name = TYPE_STM32_DMA,
+ .parent = TYPE_SYS_BUS_DEVICE,
+ .instance_size = sizeof(STM32DmaState),
+ .class_init = stm32_dma_class_init,
+};
+
+static void stm32_dma_register_types(void)
+{
+ type_register_static(&stm32_dma_info);
+}
+
+type_init(stm32_dma_register_types)
diff --git a/hw/dma/trace-events b/hw/dma/trace-events
index 4c09790f9a..8d70fea582 100644
--- a/hw/dma/trace-events
+++ b/hw/dma/trace-events
@@ -47,3 +47,18 @@ pl330_iomem_read(uint32_t addr, uint32_t data) "addr: 0x%08"PRIx32" data: 0x%08"
# xilinx_axidma.c
xilinx_axidma_loading_desc_fail(uint32_t res) "error:%u"
+
+# stm32_dma.c
+stm32_dma_reset(const char *type) "%s"
+stm32_dma_set(int line, int value) "line %d, value %d"
+stm32_dma_transfer(uint8_t idx, uint64_t src, uint8_t swidth, uint64_t dst, uint8_t dwidth, uint32_t data) "idx: %d 0x%08" PRIx64"[%u] -> 0x%08" PRIx64 "[%u] 0x%x"
+stm32_dma_read(uint64_t addr) "address: 0x%08"PRIx64
+stm32_dma_write(uint64_t addr, uint64_t val) "address: 0x%08"PRIx64" data: 0x%08"PRIx64
+stm32_dma_chan_read(uint64_t addr, uint8_t idx, uint8_t reg, uint64_t val) "address: 0x%08"PRIx64" idx: %u reg: %x data: 0x%08"PRIx64
+stm32_dma_chan_write(uint64_t addr, uint8_t idx, uint8_t reg, uint64_t val) "address: 0x%08"PRIx64" idx: %u reg: %x data: 0x%08"PRIx64
+stm32_dma_transfer_fail(uint8_t idx, uint64_t src, uint64_t dst) "idx: %d 0x%08" PRIx64" -> 0x%08" PRIx64
+stm32_dma_raise(uint8_t idx, const char* type) "idx %d: %s"
+stm32_dma_lower(uint8_t idx) "idx %d"
+stm32_dma_cmen(uint8_t idx, uint32_t cnt) "idx %d cnt %u"
+stm32_dma_disabled(uint8_t idx, bool enabled, uint32_t cnt) "idx %d enabled %u cnt %u"
+
diff --git a/include/hw/dma/stm32_dma.h b/include/hw/dma/stm32_dma.h
new file mode 100644
index 0000000000..4777037a71
--- /dev/null
+++ b/include/hw/dma/stm32_dma.h
@@ -0,0 +1,46 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * QEMU STM32 Direct memory access controller (DMA).
+ *
+ * This includes STM32F1xxxx, STM32F2xxxx and STM32F30x
+ *
+ * Author: 2025 Nikita Shubin <n.shubin@yadro.com>
+ */
+#ifndef HW_STM32_DMA_H
+#define HW_STM32_DMA_H
+
+#include "hw/sysbus.h"
+#include "qom/object.h"
+
+#define STM32_DMA_CHAN_NUMBER 7
+
+#define TYPE_STM32_DMA "stm32-dma"
+OBJECT_DECLARE_SIMPLE_TYPE(STM32DmaState, STM32_DMA)
+
+typedef struct STM32DmaChannel {
+ bool enabled;
+
+ uint32_t chctl;
+ uint32_t chcnt;
+ uint32_t chpaddr;
+ uint32_t chmaddr;
+
+ uint32_t chcnt_shadow;
+} STM32DmaChannel;
+
+typedef struct STM32DmaState {
+ /*< private >*/
+ SysBusDevice parent_obj;
+
+ /*< public >*/
+ MemoryRegion mmio;
+ uint8_t nr_chans;
+
+ uint32_t intf;
+
+ STM32DmaChannel chan[STM32_DMA_CHAN_NUMBER];
+
+ qemu_irq output[STM32_DMA_CHAN_NUMBER];
+} STM32DmaState;
+
+#endif /* HW_STM32_DMA_H */
--
2.48.1
^ permalink raw reply related [flat|nested] 5+ messages in thread* [PATCH v2 2/3] hw/arm/stm32f100: Add DMA support for stm32f100
2025-05-23 11:36 [PATCH v2 0/3] Add STM32 DMA model Nikita Shubin
2025-05-23 11:36 ` [PATCH v2 1/3] hw/dma: Add STM32 platfrom DMA controller emulation Nikita Shubin
@ 2025-05-23 11:36 ` Nikita Shubin
2025-05-23 11:36 ` [PATCH v2 3/3] tests/qtest: add qtests for STM32 DMA Nikita Shubin
2 siblings, 0 replies; 5+ messages in thread
From: Nikita Shubin @ 2025-05-23 11:36 UTC (permalink / raw)
To: qemu-devel
Cc: Paolo Bonzini, Alistair Francis, Peter Maydell, qemu-arm,
Alexandre Iooss, Fabiano Rosas, Laurent Vivier, Ilya Chichkov,
Nikita Shubin
From: Nikita Shubin <n.shubin@yadro.com>
Add STM32 DMA support for stm32f100 SoC.
Signals from periphery to DMA are not connected, as no STM32 periphery
currently supports DMA.
Signed-off-by: Nikita Shubin <n.shubin@yadro.com>
---
hw/arm/Kconfig | 1 +
hw/arm/stm32f100_soc.c | 51 ++++++++++++++++++++++++++++++++++
include/hw/arm/stm32f100_soc.h | 3 ++
3 files changed, 55 insertions(+)
diff --git a/hw/arm/Kconfig b/hw/arm/Kconfig
index a55b44d7bd..4b476cfc3b 100644
--- a/hw/arm/Kconfig
+++ b/hw/arm/Kconfig
@@ -374,6 +374,7 @@ config STM32F100_SOC
select ARM_V7M
select STM32F2XX_USART
select STM32F2XX_SPI
+ select STM32_DMA
config STM32F205_SOC
bool
diff --git a/hw/arm/stm32f100_soc.c b/hw/arm/stm32f100_soc.c
index 53b5636452..dc864ef403 100644
--- a/hw/arm/stm32f100_soc.c
+++ b/hw/arm/stm32f100_soc.c
@@ -39,9 +39,29 @@
static const uint32_t usart_addr[STM_NUM_USARTS] = { 0x40013800, 0x40004400,
0x40004800 };
static const uint32_t spi_addr[STM_NUM_SPIS] = { 0x40013000, 0x40003800 };
+static const uint32_t dma_addr[STM_NUM_DMA] = { 0x40020000, 0x40020400 };
static const int usart_irq[STM_NUM_USARTS] = {37, 38, 39};
static const int spi_irq[STM_NUM_SPIS] = {35, 36};
+static const uint8_t dma1_irq[] = {
+ 11, /* DMA1 channel0 global interrupt */
+ 12, /* DMA1 channel1 global interrupt */
+ 13, /* DMA1 channel2 global interrupt */
+ 14, /* DMA1 channel3 global interrupt */
+ 15, /* DMA1 channel4 global interrupt */
+ 16, /* DMA1 channel5 global interrupt */
+ 17, /* DMA1 channel6 global interrupt */
+};
+
+static const uint8_t dma2_irq[] = {
+ 56, /* DMA2 channel0 global interrupt */
+ 57, /* DMA2 channel1 global interrupt */
+ 58, /* DMA2 channel2 global interrupt */
+ 59, /* DMA2 channel3 global interrupt */
+ 59, /* DMA2 channel4/5 global interrupt */
+};
+
+static const uint8_t dma_chan_num[STM_NUM_DMA] = { 7, 6 };
static void stm32f100_soc_initfn(Object *obj)
{
@@ -59,6 +79,10 @@ static void stm32f100_soc_initfn(Object *obj)
object_initialize_child(obj, "spi[*]", &s->spi[i], TYPE_STM32F2XX_SPI);
}
+ for (i = 0; i < STM_NUM_DMA; i++) {
+ object_initialize_child(obj, "dma[*]", &s->dma[i], TYPE_STM32_DMA);
+ }
+
s->sysclk = qdev_init_clock_in(DEVICE(s), "sysclk", NULL, NULL, 0);
s->refclk = qdev_init_clock_in(DEVICE(s), "refclk", NULL, NULL, 0);
}
@@ -126,6 +150,33 @@ static void stm32f100_soc_realize(DeviceState *dev_soc, Error **errp)
return;
}
+ /* DMA 1 */
+ dev = DEVICE(&(s->dma[0]));
+ qdev_prop_set_uint8(dev, "nchans", dma_chan_num[0]);
+ if (!sysbus_realize(SYS_BUS_DEVICE(&s->dma[0]), errp)) {
+ return;
+ }
+ busdev = SYS_BUS_DEVICE(dev);
+ sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, dma_addr[0]);
+ for (i = 0; i < ARRAY_SIZE(dma1_irq); i++) {
+ sysbus_connect_irq(busdev, i, qdev_get_gpio_in(armv7m, dma1_irq[i]));
+ }
+
+ /* DMA 2 */
+ dev = DEVICE(&(s->dma[1]));
+ qdev_prop_set_uint8(dev, "nchans", dma_chan_num[1]);
+ if (!sysbus_realize(SYS_BUS_DEVICE(&s->dma[1]), errp)) {
+ return;
+ }
+ busdev = SYS_BUS_DEVICE(dev);
+ sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, dma_addr[1]);
+ for (i = 0; i < ARRAY_SIZE(dma2_irq); i++) {
+ sysbus_connect_irq(busdev, i, qdev_get_gpio_in(armv7m, dma2_irq[i]));
+ }
+
+ /* DMA channel 4 and 5 have shared irq */
+ sysbus_connect_irq(busdev, i, qdev_get_gpio_in(armv7m, dma2_irq[i - 1]));
+
/* Attach UART (uses USART registers) and USART controllers */
for (i = 0; i < STM_NUM_USARTS; i++) {
dev = DEVICE(&(s->usart[i]));
diff --git a/include/hw/arm/stm32f100_soc.h b/include/hw/arm/stm32f100_soc.h
index a74d7b369c..0ee02e157c 100644
--- a/include/hw/arm/stm32f100_soc.h
+++ b/include/hw/arm/stm32f100_soc.h
@@ -26,6 +26,7 @@
#define HW_ARM_STM32F100_SOC_H
#include "hw/char/stm32f2xx_usart.h"
+#include "hw/dma/stm32_dma.h"
#include "hw/ssi/stm32f2xx_spi.h"
#include "hw/arm/armv7m.h"
#include "qom/object.h"
@@ -36,6 +37,7 @@ OBJECT_DECLARE_SIMPLE_TYPE(STM32F100State, STM32F100_SOC)
#define STM_NUM_USARTS 3
#define STM_NUM_SPIS 2
+#define STM_NUM_DMA 2
#define FLASH_BASE_ADDRESS 0x08000000
#define FLASH_SIZE (128 * 1024)
@@ -49,6 +51,7 @@ struct STM32F100State {
STM32F2XXUsartState usart[STM_NUM_USARTS];
STM32F2XXSPIState spi[STM_NUM_SPIS];
+ STM32DmaState dma[STM_NUM_DMA];
MemoryRegion sram;
MemoryRegion flash;
--
2.48.1
^ permalink raw reply related [flat|nested] 5+ messages in thread* [PATCH v2 3/3] tests/qtest: add qtests for STM32 DMA
2025-05-23 11:36 [PATCH v2 0/3] Add STM32 DMA model Nikita Shubin
2025-05-23 11:36 ` [PATCH v2 1/3] hw/dma: Add STM32 platfrom DMA controller emulation Nikita Shubin
2025-05-23 11:36 ` [PATCH v2 2/3] hw/arm/stm32f100: Add DMA support for stm32f100 Nikita Shubin
@ 2025-05-23 11:36 ` Nikita Shubin
2025-05-28 12:57 ` Fabiano Rosas
2 siblings, 1 reply; 5+ messages in thread
From: Nikita Shubin @ 2025-05-23 11:36 UTC (permalink / raw)
To: qemu-devel
Cc: Paolo Bonzini, Alistair Francis, Peter Maydell, qemu-arm,
Alexandre Iooss, Fabiano Rosas, Laurent Vivier, Ilya Chichkov,
Nikita Shubin
From: Nikita Shubin <n.shubin@yadro.com>
Signed-off-by: Nikita Shubin <n.shubin@yadro.com>
---
tests/qtest/meson.build | 1 +
tests/qtest/stm32-dma-test.c | 421 +++++++++++++++++++++++++++++++++++
2 files changed, 422 insertions(+)
create mode 100644 tests/qtest/stm32-dma-test.c
diff --git a/tests/qtest/meson.build b/tests/qtest/meson.build
index 3136d15e0f..5cd14d3cfd 100644
--- a/tests/qtest/meson.build
+++ b/tests/qtest/meson.build
@@ -239,6 +239,7 @@ qtests_arm = \
(config_all_devices.has_key('CONFIG_TPM_TIS_I2C') ? ['tpm-tis-i2c-test'] : []) + \
(config_all_devices.has_key('CONFIG_VEXPRESS') ? ['test-arm-mptimer'] : []) + \
(config_all_devices.has_key('CONFIG_MICROBIT') ? ['microbit-test'] : []) + \
+ (config_all_devices.has_key('CONFIG_STM32F100_SOC') ? ['stm32-dma-test'] : []) + \
(config_all_devices.has_key('CONFIG_STM32L4X5_SOC') ? qtests_stm32l4x5 : []) + \
(config_all_devices.has_key('CONFIG_FSI_APB2OPB_ASPEED') ? ['aspeed_fsi-test'] : []) + \
(config_all_devices.has_key('CONFIG_STM32L4X5_SOC') and
diff --git a/tests/qtest/stm32-dma-test.c b/tests/qtest/stm32-dma-test.c
new file mode 100644
index 0000000000..36c9898756
--- /dev/null
+++ b/tests/qtest/stm32-dma-test.c
@@ -0,0 +1,421 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * QTest testcase for STM32 DMA engine.
+ *
+ * This includes STM32F1xxxx, STM32F2xxxx and GD32F30x
+ *
+ * Author: 2025 Nikita Shubin <n.shubin@yadro.com>
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/bitops.h"
+#include "libqtest-single.h"
+#include "libqos/libqos.h"
+
+/* Offsets in stm32vldiscovery platform: */
+#define DMA_BASE 0x40020000
+#define SRAM_BASE 0x20000000
+
+/* Global interrupt flag */
+#define DMA_ISR_GIF BIT(0)
+/* Full transfer finish */
+#define DMA_ISR_TCIF BIT(1)
+/* Half transfer finish */
+#define DMA_ISR_HTIF BIT(2)
+/* Transfer error */
+#define DMA_ISR_TEIF BIT(3)
+
+/* Used register/fields definitions */
+#define DMA_CCR(idx) (0x08 + 0x14 * idx)
+#define DMA_CNDTR(idx) (0x0C + 0x14 * idx)
+#define DMA_CPAR(idx) (0x10 + 0x14 * idx)
+#define DMA_CMAR(idx) (0x14 + 0x14 * idx)
+
+#define DMA_MAX_CHAN 7
+
+/* Register offsets for a dma chan0 within a dma block. */
+#define DMA_CHAN(_idx, _irq) \
+ { \
+ .ccr = DMA_CCR(_idx), \
+ .cndrt = DMA_CNDTR(_idx), \
+ .cpar = DMA_CPAR(_idx), \
+ .cmar = DMA_CMAR(_idx), \
+ .irq_line = _irq,\
+ }
+
+typedef struct DMAChan {
+ uint32_t ccr;
+ uint32_t cndrt;
+ uint32_t cpar;
+ uint32_t cmar;
+ uint8_t irq_line;
+} DMAChan;
+
+const DMAChan dma_chans[] = {
+ DMA_CHAN(0, 11),
+ DMA_CHAN(1, 12),
+ DMA_CHAN(2, 12),
+ DMA_CHAN(3, 13),
+ DMA_CHAN(4, 14),
+ DMA_CHAN(5, 16),
+ DMA_CHAN(6, 17),
+};
+
+/* Register offsets for a dma within a dma block. */
+typedef struct DMA {
+ uint32_t base_addr;
+ uint32_t isr;
+ uint32_t ofcr;
+} DMA;
+
+const DMA dma = {
+ .base_addr = DMA_BASE,
+ .isr = 0x00,
+ .ofcr = 0x04,
+};
+
+typedef struct TestData {
+ QTestState *qts;
+ const DMA *dma;
+ const DMAChan *chans;
+} TestData;
+
+#define NVIC_ISER 0xE000E100
+#define NVIC_ISPR 0xE000E200
+#define NVIC_ICPR 0xE000E280
+
+static void enable_nvic_irq(unsigned int n)
+{
+ writel(NVIC_ISER, 1 << n);
+}
+
+static void unpend_nvic_irq(unsigned int n)
+{
+ writel(NVIC_ICPR, 1 << n);
+}
+
+static bool check_nvic_pending(unsigned int n)
+{
+ return readl(NVIC_ISPR) & (1 << n);
+}
+
+static uint32_t dma_read(const TestData *td, uint32_t offset)
+{
+ return qtest_readl(td->qts, td->dma->base_addr + offset);
+}
+
+static void dma_write(const TestData *td, uint32_t offset, uint32_t value)
+{
+ qtest_writel(td->qts, td->dma->base_addr + offset, value);
+}
+
+static void dma_write_ofcr(const TestData *td, uint32_t value)
+{
+ return dma_write(td, td->dma->ofcr, value);
+}
+
+static uint32_t dma_read_isr(const TestData *td)
+{
+ return dma_read(td, td->dma->isr);
+}
+
+static void dma_write_ccr(const TestData *td, uint8_t idx, uint32_t value)
+{
+ dma_write(td, td->chans[idx].ccr, value);
+}
+
+static uint32_t dma_read_ccr(const TestData *td, uint8_t idx)
+{
+ return dma_read(td, td->chans[idx].ccr);
+}
+
+static void dma_write_cndrt(const TestData *td, uint8_t idx, uint32_t value)
+{
+ dma_write(td, td->chans[idx].cndrt, value);
+}
+
+static void dma_write_cpar(const TestData *td, uint8_t idx, uint32_t value)
+{
+ dma_write(td, td->chans[idx].cpar, value);
+}
+
+static void dma_write_cmar(const TestData *td, uint8_t idx, uint32_t value)
+{
+ dma_write(td, td->chans[idx].cmar, value);
+}
+
+static void test_m2m(gconstpointer test_data)
+{
+ const TestData *td = test_data;
+ QTestState *s = td->qts;
+ const uint32_t patt_len = 0xff;
+ g_autofree char *pattern_check = g_malloc(patt_len);
+ g_autofree char *pattern = g_malloc(patt_len);
+ uint8_t idx = 0;
+ uint32_t val;
+
+ enable_nvic_irq(td->chans[idx].irq_line);
+ qtest_irq_intercept_in(global_qtest, "/machine/soc/dma[0]");
+
+ /* write addr */
+ dma_write_cpar(td, idx, SRAM_BASE);
+ dma_write_cmar(td, idx, SRAM_BASE + patt_len);
+
+ /* enable increment and M2M */
+ val = dma_read_ccr(td, idx);
+ val |= BIT(1); /* TCIE */
+ val |= BIT(6); /* PINC */
+ val |= BIT(7); /* MINC */
+ val |= BIT(14); /* M2M */
+ dma_write_ccr(td, idx, val);
+
+ generate_pattern(pattern, patt_len, patt_len);
+ qtest_memwrite(s, SRAM_BASE, pattern, patt_len);
+
+ dma_write_cndrt(td, idx, patt_len);
+
+ val |= BIT(0); /* enable channel */
+ dma_write_ccr(td, idx, val);
+
+ qtest_memread(s, SRAM_BASE + patt_len, pattern_check, patt_len);
+
+ g_assert(memcmp(pattern, pattern_check, patt_len) == 0);
+
+ g_assert_true(check_nvic_pending(td->chans[idx].irq_line));
+}
+
+typedef struct width_pattern {
+ uint32_t src;
+ uint8_t swidth;
+ uint32_t dst;
+ uint8_t dwidth;
+} width_pattern;
+
+static void test_width(gconstpointer test_data)
+{
+ const width_pattern patterns[] = {
+ { 0xb0, 1, 0xb0, 1 },
+ { 0xb0, 1, 0x00b0, 2 },
+ { 0xb0, 1, 0x000000b0, 4 },
+ { 0xb1b0, 2, 0xb0, 1 },
+ { 0xb1b0, 2, 0xb1b0, 2 },
+ { 0xb1b0, 2, 0x0000b1b0, 4 },
+ { 0xb3b2b1b0, 4, 0xb0, 1 },
+ { 0xb3b2b1b0, 4, 0xb1b0, 2 },
+ { 0xb3b2b1b0, 4, 0xb3b2b1b0, 4 },
+ };
+
+ const TestData *td = test_data;
+ QTestState *s = td->qts;
+ const uint32_t patt = 0xffffffff;
+ const uint32_t patt_len = 4;
+ uint8_t idx = 0;
+ uint32_t dst;
+ uint32_t val;
+ QDict *resp;
+
+ resp = qmp("{'execute':'system_reset' }");
+ qobject_unref(resp);
+
+ /* write addr */
+ dma_write_cpar(td, idx, SRAM_BASE);
+ dma_write_cmar(td, idx, SRAM_BASE + patt_len);
+
+ /* enable increment and M2M */
+ val = dma_read_ccr(td, idx);
+ val |= BIT(6); /* PINC */
+ val |= BIT(7); /* MINC */
+ val |= BIT(14); /* M2M */
+ dma_write_ccr(td, idx, val);
+
+ for (int i = 0; i < ARRAY_SIZE(patterns); i++) {
+ /* fill destination and source with pattern */
+ qtest_memwrite(s, SRAM_BASE, &patt, patt_len);
+ qtest_memwrite(s, SRAM_BASE + patt_len, &patt, patt_len);
+
+ qtest_memwrite(s, SRAM_BASE, &patterns[i].src, patterns[i].swidth);
+
+ dma_write_cndrt(td, idx, 1);
+ val |= BIT(0); /* enable channel */
+ val = deposit32(val, 8, 2, patterns[i].swidth >> 1);
+ val = deposit32(val, 10, 2, patterns[i].dwidth >> 1);
+ dma_write_ccr(td, idx, val);
+
+ qtest_memread(s, SRAM_BASE + patt_len, &dst, patterns[i].dwidth);
+
+ g_assert(memcmp(&dst, &patterns[i].dst, patterns[i].dwidth) == 0);
+
+ /* disable chan */
+ val &= ~BIT(0);
+ dma_write_ccr(td, idx, val);
+ }
+}
+
+static void dma_set_irq(unsigned int idx, int num, int level)
+{
+ g_autofree char *name = g_strdup_printf("/machine/soc/dma[%u]",
+ idx);
+ qtest_set_irq_in(global_qtest, name, NULL, num, level);
+}
+
+static void test_triggers(gconstpointer test_data)
+{
+ const TestData *td = test_data;
+ QTestState *s = td->qts;
+ const uint32_t patt = 0xffffffff;
+ const uint32_t patt_len = 4;
+ uint32_t dst;
+ uint32_t val;
+ QDict *resp;
+
+ resp = qmp("{'execute':'system_reset' }");
+ qobject_unref(resp);
+
+ for (int i = 0; i < ARRAY_SIZE(dma_chans); i++) {
+ qtest_memset(s, SRAM_BASE, 0, patt_len * 2);
+ qtest_memwrite(s, SRAM_BASE, &patt, patt_len);
+
+ /* write addr */
+ dma_write_cpar(td, i, SRAM_BASE);
+ dma_write_cmar(td, i, SRAM_BASE + patt_len);
+
+ val = dma_read_ccr(td, i);
+
+ dma_write_cndrt(td, i, 1);
+ val |= BIT(0); /* enable channel */
+ val = deposit32(val, 8, 2, patt_len >> 1);
+ val = deposit32(val, 10, 2, patt_len >> 1);
+ dma_write_ccr(td, i, val);
+
+ dma_set_irq(0, i, 1);
+
+ qtest_memread(s, SRAM_BASE + patt_len, &dst, patt_len);
+
+ g_assert(memcmp(&dst, &patt, patt_len) == 0);
+
+ /* disable chan */
+ val &= ~BIT(0);
+ dma_write_ccr(td, i, val);
+ }
+}
+
+static void test_interrupts(gconstpointer test_data)
+{
+ const TestData *td = test_data;
+ const uint32_t patt_len = 1024;
+ uint8_t idx = 0;
+ uint32_t val;
+ QDict *resp;
+
+ resp = qmp("{'execute':'system_reset' }");
+ qobject_unref(resp);
+
+ enable_nvic_irq(td->chans[idx].irq_line);
+
+ /* write addr */
+ dma_write_cpar(td, idx, SRAM_BASE);
+ dma_write_cmar(td, idx, SRAM_BASE + patt_len);
+
+ /* write counter */
+ dma_write_cndrt(td, idx, 2);
+
+ /* enable increment and M2M */
+ val = dma_read_ccr(td, idx);
+ val |= BIT(0); /* EN */
+ val |= BIT(1); /* TCIE */
+ val |= BIT(2); /* HTIE */
+ val |= BIT(3); /* TEIE */
+ val |= BIT(6); /* PINC */
+ val |= BIT(7); /* MINC */
+ dma_write_ccr(td, idx, val);
+
+ /* Half-transfer */
+ dma_set_irq(0, idx, 1);
+ g_assert_true(check_nvic_pending(td->chans[idx].irq_line));
+ val = dma_read_isr(td);
+
+ g_assert_true(val & DMA_ISR_GIF);
+ g_assert_true(val & DMA_ISR_HTIF);
+ unpend_nvic_irq(td->chans[idx].irq_line);
+
+ dma_write_ofcr(td, 0xffffffff);
+ val = dma_read_isr(td);
+ g_assert_false(val & DMA_ISR_GIF);
+ g_assert_false(val & DMA_ISR_HTIF);
+
+ /* Full-transfer */
+ dma_set_irq(0, idx, 1);
+ g_assert_true(check_nvic_pending(td->chans[idx].irq_line));
+ val = dma_read_isr(td);
+
+ g_assert_true(val & DMA_ISR_GIF);
+ g_assert_true(val & DMA_ISR_HTIF);
+ g_assert_true(val & DMA_ISR_TCIF);
+ unpend_nvic_irq(td->chans[idx].irq_line);
+
+ dma_write_ofcr(td, 0xffffffff);
+ val = dma_read_isr(td);
+ g_assert_false(val & DMA_ISR_GIF);
+ g_assert_false(val & DMA_ISR_HTIF);
+ g_assert_false(val & DMA_ISR_TCIF);
+
+ /* Error-on-transfer */
+ val = dma_read_ccr(td, idx);
+ val &= ~BIT(0);
+ dma_write_ccr(td, idx, val);
+
+ dma_write_cndrt(td, idx, 1);
+ dma_write_cpar(td, idx, 0xffffffff);
+
+ val |= BIT(0);
+ dma_write_ccr(td, idx, val);
+
+ dma_set_irq(0, idx, 1);
+ g_assert_true(check_nvic_pending(td->chans[idx].irq_line));
+ val = dma_read_isr(td);
+
+ g_assert_true(val & DMA_ISR_GIF);
+ g_assert_true(val & DMA_ISR_TEIF);
+ unpend_nvic_irq(td->chans[idx].irq_line);
+
+ dma_write_ofcr(td, 0xffffffff);
+ val = dma_read_isr(td);
+ g_assert_false(val & DMA_ISR_GIF);
+ g_assert_false(val & DMA_ISR_TEIF);
+}
+
+static void stm32_add_test(const char *name, const TestData *td,
+ GTestDataFunc fn)
+{
+ g_autofree char *full_name = g_strdup_printf(
+ "stm32_dma/%s", name);
+ qtest_add_data_func(full_name, td, fn);
+}
+
+/* Convenience macro for adding a test with a predictable function name. */
+#define add_test(name, td) stm32_add_test(#name, td, test_##name)
+
+int main(int argc, char **argv)
+{
+ TestData testdata;
+ QTestState *s;
+ int ret;
+
+ g_test_init(&argc, &argv, NULL);
+ s = qtest_start("-machine stm32vldiscovery");
+ g_test_set_nonfatal_assertions();
+
+ TestData *td = &testdata;
+ td->qts = s;
+ td->dma = &dma;
+ td->chans = dma_chans;
+ add_test(m2m, td);
+ add_test(width, td);
+ add_test(triggers, td);
+ add_test(interrupts, td);
+
+ ret = g_test_run();
+ qtest_end();
+
+ return ret;
+}
--
2.48.1
^ permalink raw reply related [flat|nested] 5+ messages in thread