Generates the device node of VFIO devices, if any are invoked in
-device option. In case VFIO devices require more complex node
generation, they can be handled before.
Signed-off-by: Eric Auger <eric.auger@xxxxxxxxxx>
---
hw/arm/dyn_sysbus_devtree.c | 138 ++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 138 insertions(+)
diff --git a/hw/arm/dyn_sysbus_devtree.c b/hw/arm/dyn_sysbus_devtree.c
index 56af62f..ac34f07 100644
--- a/hw/arm/dyn_sysbus_devtree.c
+++ b/hw/arm/dyn_sysbus_devtree.c
@@ -1,6 +1,139 @@
#include "hw/arm/dyn_sysbus_devtree.h"
#include "qemu/error-report.h"
#include "sysemu/device_tree.h"
+#include "hw/vfio/vfio-platform.h"
+
+static void vfio_fdt_add_device_node(SysBusDevice *sbdev, void *opaque);
+
+static char *format_compat(char * compat)
+{
+ char *str_ptr, *corrected_compat;
+ /*
+ * process compatibility property string passed by end-user
+ * replaces / by , and ; by NUL character
+ */
+ corrected_compat = g_strdup(compat);
+ /*
+ * the total length of the string has to include also the last
+ * NUL char.
+ */
+
+ str_ptr = corrected_compat;
+ while ((str_ptr = strchr(str_ptr, '/')) != NULL) {
+ *str_ptr = ',';
+ }
+
+ /* substitute ";" with the NUL char */
+ str_ptr = corrected_compat;
+ while ((str_ptr = strchr(str_ptr, ';')) != NULL) {
+ *str_ptr = '\0';
+ }
+
+ return corrected_compat;
+}
+
+static void wrap_vfio_fdt_add_node(SysBusDevice *sbdev, void *opaque)
+{
+ PlatformDevtreeData *data = opaque;
+ VFIOPlatformDevice *vdev = VFIO_PLATFORM_DEVICE(sbdev);
+ VFIODevice *vbasedev = &vdev->vbasedev;
+ gchar irq_number_prop[8];
+ Object *obj = OBJECT(sbdev);
+ char *corrected_compat;
+ uint64_t irq_number;
+ int compat_str_len = strlen(vdev->compat)+1;
+ int i;
+
+ corrected_compat = format_compat(vdev->compat);
+ snprintf(vdev->compat, compat_str_len, "%s", corrected_compat);
+ g_free(corrected_compat);
+
+ vfio_fdt_add_device_node(sbdev, opaque);
+
+ for (i = 0; i < vbasedev->num_irqs; i++) {
+ snprintf(irq_number_prop, sizeof(irq_number_prop), "irq[%d]", i);
+ irq_number = object_property_get_int(obj, irq_number_prop, NULL)
+ + data->irq_start;
+ /*
+ * for setting irqfd up we must provide the virtual IRQ number
+ * which is the sum of irq_start and actual platform bus irq
+ * index. At realize point we do not have this info.
+ */
+ if (vdev->irqfd_allowed) {
+ vfio_setup_irqfd(sbdev, i, irq_number);
+ }
+ }
+}
+
+static void vfio_fdt_add_device_node(SysBusDevice *sbdev, void *opaque)
+{
+ PlatformDevtreeData *data = opaque;
+ void *fdt = data->fdt;
+ const char *parent_node = data->node;
+ int compat_str_len;
+ char *nodename;
+ int i, ret;
+ uint32_t *irq_attr;
+ uint64_t *reg_attr;
+ uint64_t mmio_base;
+ uint64_t irq_number;
+ gchar mmio_base_prop[8];
+ gchar irq_number_prop[8];
+ VFIOPlatformDevice *vdev = VFIO_PLATFORM_DEVICE(sbdev);
+ VFIODevice *vbasedev = &vdev->vbasedev;
+ Object *obj = OBJECT(sbdev);
+
+ mmio_base = object_property_get_int(obj, "mmio[0]", NULL);
+
+ nodename = g_strdup_printf("%s/%s@%" PRIx64, parent_node,
+ vbasedev->name,
+ mmio_base);
+
+ qemu_fdt_add_subnode(fdt, nodename);
+
+ compat_str_len = strlen(vdev->compat) + 1;
+ qemu_fdt_setprop(fdt, nodename, "compatible",
+ vdev->compat, compat_str_len);
+
+ reg_attr = g_new(uint64_t, vbasedev->num_regions*4);
+
+ for (i = 0; i < vbasedev->num_regions; i++) {
+ snprintf(mmio_base_prop, sizeof(mmio_base_prop), "mmio[%d]", i);
+ mmio_base = object_property_get_int(obj, mmio_base_prop, NULL);
+ reg_attr[2*i] = 1;
+ reg_attr[2*i+1] = mmio_base;
+ reg_attr[2*i+2] = 1;
+ reg_attr[2*i+3] = memory_region_size(&vdev->regions[i]->mem);
+ }
+
+ ret = qemu_fdt_setprop_sized_cells_from_array(fdt, nodename, "reg",
+ vbasedev->num_regions*2, reg_attr);
+ if (ret < 0) {
+ error_report("could not set reg property of node %s", nodename);
+ }
+
+ irq_attr = g_new(uint32_t, vbasedev->num_irqs*3);
+
+ for (i = 0; i < vbasedev->num_irqs; i++) {
+ snprintf(irq_number_prop, sizeof(irq_number_prop), "irq[%d]", i);
+ irq_number = object_property_get_int(obj, irq_number_prop, NULL)
+ + data->irq_start;
+ irq_attr[3*i] = cpu_to_be32(0);
+ irq_attr[3*i+1] = cpu_to_be32(irq_number);
+ irq_attr[3*i+2] = cpu_to_be32(0x4);
+ }
+
+ ret = qemu_fdt_setprop(fdt, nodename, "interrupts",
+ irq_attr, vbasedev->num_irqs*3*sizeof(uint32_t));
+ if (ret < 0) {
+ error_report("could not set interrupts property of node %s",
+ nodename);
+ }
+
+ g_free(nodename);
+ g_free(irq_attr);
+ g_free(reg_attr);
+}
int sysbus_device_create_devtree(Object *obj, void *opaque)
{
@@ -17,6 +150,11 @@ int sysbus_device_create_devtree(Object *obj, void *opaque)
return object_child_foreach(obj, sysbus_device_create_devtree, data);
}
+ if (object_dynamic_cast(obj, TYPE_VFIO_PLATFORM)) {
