[PULL,15/20] hw/arm/exynos4210: Fix DMA initialization

Commit Message

Peter Maydell Jan. 23, 2020, 3:30 p.m. UTC

From: Guenter Roeck <[e-mail]>

First parameter to exynos4210_get_irq() is not the SPI port number,
but the interrupt group number. Interrupt groups are 20 for mdma
and 21 for pdma. Interrupts are not inverted. Controllers support 32
events (pdma) or 31 events (mdma). Events must all be routed to a single
interrupt line. Set other parameters as documented in Exynos4210 datasheet,
section 8 (DMA controller).

Fixes: 59520dc65e ("hw/arm/exynos4210: Add DMA support for the Exynos4210")
Reviewed-by: Peter Maydell <[e-mail]>
Signed-off-by: Guenter Roeck <[e-mail]>
Message-id: [e-mail]
Signed-off-by: Peter Maydell <[e-mail]>
---
 include/hw/arm/exynos4210.h |  4 +++
 hw/arm/exynos4210.c         | 51 +++++++++++++++++++++++++++++++------
 2 files changed, 47 insertions(+), 8 deletions(-)

Patch

diff --git a/include/hw/arm/exynos4210.h b/include/hw/arm/exynos4210.h
index f0f23b0e9b2..55260394af6 100644
--- a/include/hw/arm/exynos4210.h
+++ b/include/hw/arm/exynos4210.h
@@ -24,6 +24,7 @@ 
 #ifndef EXYNOS4210_H
 #define EXYNOS4210_H
 
+#include "hw/or-irq.h"
 #include "hw/sysbus.h"
 #include "target/arm/cpu-qom.h"
 
@@ -74,6 +75,8 @@ 
 
 #define EXYNOS4210_I2C_NUMBER               9
 
+#define EXYNOS4210_NUM_DMA      3
+
 typedef struct Exynos4210Irq {
     qemu_irq int_combiner_irq[EXYNOS4210_MAX_INT_COMBINER_IN_IRQ];
     qemu_irq ext_combiner_irq[EXYNOS4210_MAX_EXT_COMBINER_IN_IRQ];
@@ -97,6 +100,7 @@  typedef struct Exynos4210State {
     MemoryRegion boot_secondary;
     MemoryRegion bootreg_mem;
     I2CBus *i2c_if[EXYNOS4210_I2C_NUMBER];
+    qemu_or_irq pl330_irq_orgate[EXYNOS4210_NUM_DMA];
 } Exynos4210State;
 
 #define TYPE_EXYNOS4210_SOC "exynos4210"
diff --git a/hw/arm/exynos4210.c b/hw/arm/exynos4210.c
index 77fbe1baabc..7701a3fa8bd 100644
--- a/hw/arm/exynos4210.c
+++ b/hw/arm/exynos4210.c
@@ -166,17 +166,36 @@  static uint64_t exynos4210_calc_affinity(int cpu)
     return (0x9 << ARM_AFF1_SHIFT) | cpu;
 }
 
-static void pl330_create(uint32_t base, qemu_irq irq, int nreq)
+static void pl330_create(uint32_t base, qemu_or_irq *orgate, qemu_irq irq,
+                         int nreq, int nevents, int width)
 {
     SysBusDevice *busdev;
     DeviceState *dev;
+    int i;
 
     dev = qdev_create(NULL, "pl330");
+    qdev_prop_set_uint8(dev, "num_events", nevents);
+    qdev_prop_set_uint8(dev, "num_chnls",  8);
     qdev_prop_set_uint8(dev, "num_periph_req",  nreq);
+
+    qdev_prop_set_uint8(dev, "wr_cap", 4);
+    qdev_prop_set_uint8(dev, "wr_q_dep", 8);
+    qdev_prop_set_uint8(dev, "rd_cap", 4);
+    qdev_prop_set_uint8(dev, "rd_q_dep", 8);
+    qdev_prop_set_uint8(dev, "data_width", width);
+    qdev_prop_set_uint16(dev, "data_buffer_dep", width);
     qdev_init_nofail(dev);
     busdev = SYS_BUS_DEVICE(dev);
     sysbus_mmio_map(busdev, 0, base);
-    sysbus_connect_irq(busdev, 0, irq);
+
+    object_property_set_int(OBJECT(orgate), nevents + 1, "num-lines",
+                            &error_abort);
+    object_property_set_bool(OBJECT(orgate), true, "realized", &error_abort);
+
+    for (i = 0; i < nevents + 1; i++) {
+        sysbus_connect_irq(busdev, i, qdev_get_gpio_in(DEVICE(orgate), i));
+    }
+    qdev_connect_gpio_out(DEVICE(orgate), 0, irq);
 }
 
 static void exynos4210_realize(DeviceState *socdev, Error **errp)
@@ -431,12 +450,27 @@  static void exynos4210_realize(DeviceState *socdev, Error **errp)
             s->irq_table[exynos4210_get_irq(28, 3)]);
 
     /*** DMA controllers ***/
-    pl330_create(EXYNOS4210_PL330_BASE0_ADDR,
-                 qemu_irq_invert(s->irq_table[exynos4210_get_irq(35, 1)]), 32);
-    pl330_create(EXYNOS4210_PL330_BASE1_ADDR,
-                 qemu_irq_invert(s->irq_table[exynos4210_get_irq(36, 1)]), 32);
-    pl330_create(EXYNOS4210_PL330_BASE2_ADDR,
-                 qemu_irq_invert(s->irq_table[exynos4210_get_irq(34, 1)]), 1);
+    pl330_create(EXYNOS4210_PL330_BASE0_ADDR, &s->pl330_irq_orgate[0],
+                 s->irq_table[exynos4210_get_irq(21, 0)], 32, 32, 32);
+    pl330_create(EXYNOS4210_PL330_BASE1_ADDR, &s->pl330_irq_orgate[1],
+                 s->irq_table[exynos4210_get_irq(21, 1)], 32, 32, 32);
+    pl330_create(EXYNOS4210_PL330_BASE2_ADDR, &s->pl330_irq_orgate[2],
+                 s->irq_table[exynos4210_get_irq(20, 1)], 1, 31, 64);
+}
+
+static void exynos4210_init(Object *obj)
+{
+    Exynos4210State *s = EXYNOS4210_SOC(obj);
+    int i;
+
+    for (i = 0; i < ARRAY_SIZE(s->pl330_irq_orgate); i++) {
+        char *name = g_strdup_printf("pl330-irq-orgate%d", i);
+        qemu_or_irq *orgate = &s->pl330_irq_orgate[i];
+
+        object_initialize_child(obj, name, orgate, sizeof(*orgate),
+                                TYPE_OR_IRQ, &error_abort, NULL);
+        g_free(name);
+    }
 }
 
 static void exynos4210_class_init(ObjectClass *klass, void *data)
@@ -450,6 +484,7 @@  static const TypeInfo exynos4210_info = {
     .name = TYPE_EXYNOS4210_SOC,
     .parent = TYPE_SYS_BUS_DEVICE,
     .instance_size = sizeof(Exynos4210State),
+    .instance_init = exynos4210_init,
     .class_init = exynos4210_class_init,
 };