[Qemu-devel] [PATCH v11 12/17] hw/arm/virt: Add SMMUv3 to the virt board

[Eric Auger <eric.auger@redhat.com>]

From: Prem Mallappa <prem.mallappa@broadcom.com>

Add code to instantiate an smmuv3 in virt machine. A new iommu
integer member is introduced in VirtMachineState to store the type
of the iommu in use.

Signed-off-by: Prem Mallappa <prem.mallappa@broadcom.com>
Signed-off-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>

---
v9 -> v10:
- add VirtIOMMUType
- add Peter's R-b

v7 -> v8:
- integer iommu member
- add primary-bus property

v4 -> v5:
- add dma-coherent property

v2 -> v3:
- vbi was removed. Use vms instead
- migrate to new smmu binding format (iommu-map)
- don't use appendprop anymore
- add vms->smmu and guard instantiation with this latter
- interrupts type changed to edge
---
 hw/arm/virt.c         | 64 ++++++++++++++++++++++++++++++++++++++++++++++++++-
 include/hw/arm/virt.h | 10 ++++++++
 2 files changed, 73 insertions(+), 1 deletion(-)

diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index 94dcb12..1799702 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -58,6 +58,7 @@
 #include "hw/smbios/smbios.h"
 #include "qapi/visitor.h"
 #include "standard-headers/linux/input.h"
+#include "hw/arm/smmuv3.h"
 
 #define DEFINE_VIRT_MACHINE_LATEST(major, minor, latest) \
     static void virt_##major##_##minor##_class_init(ObjectClass *oc, \
@@ -141,6 +142,7 @@ static const MemMapEntry a15memmap[] = {
     [VIRT_FW_CFG] =             { 0x09020000, 0x00000018 },
     [VIRT_GPIO] =               { 0x09030000, 0x00001000 },
     [VIRT_SECURE_UART] =        { 0x09040000, 0x00001000 },
+    [VIRT_SMMU] =               { 0x09050000, 0x00020000 },
     [VIRT_MMIO] =               { 0x0a000000, 0x00000200 },
     /* ...repeating for a total of NUM_VIRTIO_TRANSPORTS, each of that size */
     [VIRT_PLATFORM_BUS] =       { 0x0c000000, 0x02000000 },
@@ -161,6 +163,7 @@ static const int a15irqmap[] = {
     [VIRT_SECURE_UART] = 8,
     [VIRT_MMIO] = 16, /* ...to 16 + NUM_VIRTIO_TRANSPORTS - 1 */
     [VIRT_GIC_V2M] = 48, /* ...to 48 + NUM_GICV2M_SPIS - 1 */
+    [VIRT_SMMU] = 74,    /* ...to 74 + NUM_SMMU_IRQS - 1 */
     [VIRT_PLATFORM_BUS] = 112, /* ...to 112 + PLATFORM_BUS_NUM_IRQS -1 */
 };
 
@@ -942,7 +945,57 @@ static void create_pcie_irq_map(const VirtMachineState *vms,
                            0x7           /* PCI irq */);
 }
 
-static void create_pcie(const VirtMachineState *vms, qemu_irq *pic)
+static void create_smmu(const VirtMachineState *vms, qemu_irq *pic,
+                        PCIBus *bus)
+{
+    char *node;
+    const char compat[] = "arm,smmu-v3";
+    int irq =  vms->irqmap[VIRT_SMMU];
+    int i;
+    hwaddr base = vms->memmap[VIRT_SMMU].base;
+    hwaddr size = vms->memmap[VIRT_SMMU].size;
+    const char irq_names[] = "eventq\0priq\0cmdq-sync\0gerror";
+    DeviceState *dev;
+
+    if (vms->iommu != VIRT_IOMMU_SMMUV3 || !vms->iommu_phandle) {
+        return;
+    }
+
+    dev = qdev_create(NULL, "arm-smmuv3");
+
+    object_property_set_link(OBJECT(dev), OBJECT(bus), "primary-bus",
+                             &error_abort);
+    qdev_init_nofail(dev);
+    sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, base);
+    for (i = 0; i < NUM_SMMU_IRQS; i++) {
+        sysbus_connect_irq(SYS_BUS_DEVICE(dev), i, pic[irq + i]);
+    }
+
+    node = g_strdup_printf("/smmuv3@%" PRIx64, base);
+    qemu_fdt_add_subnode(vms->fdt, node);
+    qemu_fdt_setprop(vms->fdt, node, "compatible", compat, sizeof(compat));
+    qemu_fdt_setprop_sized_cells(vms->fdt, node, "reg", 2, base, 2, size);
+
+    qemu_fdt_setprop_cells(vms->fdt, node, "interrupts",
+            GIC_FDT_IRQ_TYPE_SPI, irq    , GIC_FDT_IRQ_FLAGS_EDGE_LO_HI,
+            GIC_FDT_IRQ_TYPE_SPI, irq + 1, GIC_FDT_IRQ_FLAGS_EDGE_LO_HI,
+            GIC_FDT_IRQ_TYPE_SPI, irq + 2, GIC_FDT_IRQ_FLAGS_EDGE_LO_HI,
+            GIC_FDT_IRQ_TYPE_SPI, irq + 3, GIC_FDT_IRQ_FLAGS_EDGE_LO_HI);
+
+    qemu_fdt_setprop(vms->fdt, node, "interrupt-names", irq_names,
+                     sizeof(irq_names));
+
+    qemu_fdt_setprop_cell(vms->fdt, node, "clocks", vms->clock_phandle);
+    qemu_fdt_setprop_string(vms->fdt, node, "clock-names", "apb_pclk");
+    qemu_fdt_setprop(vms->fdt, node, "dma-coherent", NULL, 0);
+
+    qemu_fdt_setprop_cell(vms->fdt, node, "#iommu-cells", 1);
+
+    qemu_fdt_setprop_cell(vms->fdt, node, "phandle", vms->iommu_phandle);
+    g_free(node);
+}
+
+static void create_pcie(VirtMachineState *vms, qemu_irq *pic)
 {
     hwaddr base_mmio = vms->memmap[VIRT_PCIE_MMIO].base;
     hwaddr size_mmio = vms->memmap[VIRT_PCIE_MMIO].size;
@@ -1055,6 +1108,15 @@ static void create_pcie(const VirtMachineState *vms, qemu_irq *pic)
     qemu_fdt_setprop_cell(vms->fdt, nodename, "#interrupt-cells", 1);
     create_pcie_irq_map(vms, vms->gic_phandle, irq, nodename);
 
+    if (vms->iommu) {
+        vms->iommu_phandle = qemu_fdt_alloc_phandle(vms->fdt);
+
+        create_smmu(vms, pic, pci->bus);
+
+        qemu_fdt_setprop_cells(vms->fdt, nodename, "iommu-map",
+                               0x0, vms->iommu_phandle, 0x0, 0x10000);
+    }
+
     g_free(nodename);
 }
 
diff --git a/include/hw/arm/virt.h b/include/hw/arm/virt.h
index ba0c1a4..886372c 100644
--- a/include/hw/arm/virt.h
+++ b/include/hw/arm/virt.h
@@ -38,6 +38,7 @@
 
 #define NUM_GICV2M_SPIS       64
 #define NUM_VIRTIO_TRANSPORTS 32
+#define NUM_SMMU_IRQS          4
 
 #define ARCH_GICV3_MAINT_IRQ  9
 
@@ -59,6 +60,7 @@ enum {
     VIRT_GIC_V2M,
     VIRT_GIC_ITS,
     VIRT_GIC_REDIST,
+    VIRT_SMMU,
     VIRT_UART,
     VIRT_MMIO,
     VIRT_RTC,
@@ -74,6 +76,12 @@ enum {
     VIRT_SECURE_MEM,
 };
 
+typedef enum VirtIOMMUType {
+    VIRT_IOMMU_NONE,
+    VIRT_IOMMU_SMMUV3,
+    VIRT_IOMMU_VIRTIO,
+} VirtIOMMUType;
+
 typedef struct MemMapEntry {
     hwaddr base;
     hwaddr size;
@@ -97,6 +105,7 @@ typedef struct {
     bool its;
     bool virt;
     int32_t gic_version;
+    VirtIOMMUType iommu;
     struct arm_boot_info bootinfo;
     const MemMapEntry *memmap;
     const int *irqmap;
@@ -106,6 +115,7 @@ typedef struct {
     uint32_t clock_phandle;
     uint32_t gic_phandle;
     uint32_t msi_phandle;
+    uint32_t iommu_phandle;
     int psci_conduit;
 } VirtMachineState;
 
-- 
2.5.5