[Minios-devel] [UNIKRAFT PATCH v3 03/14] plat/virtio: Skeleton for virtio block driver

[Roxana Nicolescu <nicolescu.roxana1996@xxxxxxxxx>]

This patch introduces the virtio block driver skeleton.

Signed-off-by: Roxana Nicolescu <nicolescu.roxana1996@xxxxxxxxx>
---
 plat/drivers/virtio/virtio_blk.c | 58 ++++++++++++++++++++++++++++++++
 plat/kvm/Config.uk               | 12 ++++++-
 plat/kvm/Makefile.uk             | 12 +++++++
 3 files changed, 81 insertions(+), 1 deletion(-)
 create mode 100644 plat/drivers/virtio/virtio_blk.c

diff --git a/plat/drivers/virtio/virtio_blk.c b/plat/drivers/virtio/virtio_blk.c
new file mode 100644
index 00000000..89fd1779
--- /dev/null
+++ b/plat/drivers/virtio/virtio_blk.c
@@ -0,0 +1,58 @@
+/*
+ * Authors: Roxana Nicolescu <nicolescu.roxana1996@xxxxxxxxx>
+ *
+ * Copyright (c) 2019, University Politehnica of Bucharest.
+ *
+ * Permission to use, copy, modify, and/or distribute this software
+ * for any purpose with or without fee is hereby granted, provided
+ * that the above copyright notice and this permission notice appear
+ * in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
+ * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
+ * OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
+ * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+/* Taken and adapted from virtio-net because of consistency reason. */
+
+#include <virtio/virtio_bus.h>
+#include <virtio/virtio_ids.h>
+
+#define DRIVER_NAME            "virtio-blk"
+
+static struct uk_alloc *a;
+
+static int virtio_blk_add_dev(struct virtio_dev *vdev)
+{
+       int rc = 0;
+
+       UK_ASSERT(vdev != NULL);
+
+       return rc;
+}
+
+static int virtio_blk_drv_init(struct uk_alloc *drv_allocator)
+{
+       /* driver initialization */
+       if (!drv_allocator)
+               return -EINVAL;
+
+       a = drv_allocator;
+       return 0;
+}
+
+static const struct virtio_dev_id vblk_dev_id[] = {
+       {VIRTIO_ID_BLOCK},
+       {VIRTIO_ID_INVALID} /* List Terminator */
+};
+
+static struct virtio_driver vblk_drv = {
+       .dev_ids = vblk_dev_id,
+       .init    = virtio_blk_drv_init,
+       .add_dev = virtio_blk_add_dev
+};
+VIRTIO_BUS_REGISTER_DRIVER(&vblk_drv);
diff --git a/plat/kvm/Config.uk b/plat/kvm/Config.uk
index 432cdd95..9aa8a632 100644
--- a/plat/kvm/Config.uk
+++ b/plat/kvm/Config.uk
@@ -65,7 +65,7 @@ config VIRTIO_BUS
 menu "Virtio"
 config VIRTIO_PCI
        bool "Virtio PCI device support"
-       default y if (VIRTIO_NET || VIRTIO_9P)
+       default y if (VIRTIO_NET || VIRTIO_9P || VIRTIO_BLK)
        default n
        depends on KVM_PCI
        select VIRTIO_BUS
@@ -83,6 +83,16 @@ config VIRTIO_NET
        help
               Virtual network driver.
 
+config VIRTIO_BLK
+       bool "Virtio Block Device"
+       default y if LIBUKBLKDEV
+       default n
+       depends on LIBUKBLKDEV
+       select VIRTIO_BUS
+       select LIBUKGLIST
+       help
+               Virtual block driver.
+
 config VIRTIO_9P
        bool "Virtio 9P device"
        default y if LIBUK9P
diff --git a/plat/kvm/Makefile.uk b/plat/kvm/Makefile.uk
index 63ed9950..7f07f22f 100644
--- a/plat/kvm/Makefile.uk
+++ b/plat/kvm/Makefile.uk
@@ -10,6 +10,7 @@ $(eval $(call addplatlib,kvm,libkvmplat))
 $(eval $(call addplatlib_s,kvm,libkvmpci,$(CONFIG_KVM_PCI)))
 $(eval $(call addplatlib_s,kvm,libkvmvirtio,$(CONFIG_VIRTIO_BUS)))
 $(eval $(call addplatlib_s,kvm,libkvmvirtionet,$(CONFIG_VIRTIO_NET)))
+$(eval $(call addplatlib_s,kvm,libkvmvirtioblk,$(CONFIG_VIRTIO_BLK)))
 $(eval $(call addplatlib_s,kvm,libkvmvirtio9p,$(CONFIG_VIRTIO_9P)))
 $(eval $(call addplatlib_s,kvm,libkvmofw,$(CONFIG_LIBOFW)))
 $(eval $(call addplatlib_s,kvm,libkvmgicv2,$(CONFIG_LIBGICV2)))
@@ -139,6 +140,17 @@ LIBKVMVIRTIONET_ASINCLUDES-y   += 
-I$(UK_PLAT_DRIVERS_BASE)/include
 LIBKVMVIRTIONET_CINCLUDES-y    += -I$(UK_PLAT_DRIVERS_BASE)/include
 LIBKVMVIRTIONET_SRCS-y +=\
                        $(UK_PLAT_DRIVERS_BASE)/virtio/virtio_net.c
+##
+## Virtio BLK library definition
+##
+LIBKVMVIRTIOBLK_ASINCLUDES-y   += -I$(LIBKVMPLAT_BASE)/include
+LIBKVMVIRTIOBLK_CINCLUDES-y    += -I$(LIBKVMPLAT_BASE)/include
+LIBKVMVIRTIOBLK_ASINCLUDES-y   += -I$(UK_PLAT_COMMON_BASE)/include
+LIBKVMVIRTIOBLK_CINCLUDES-y    += -I$(UK_PLAT_COMMON_BASE)/include
+LIBKVMVIRTIOBLK_ASINCLUDES-y   += -I$(UK_PLAT_DRIVERS_BASE)/include
+LIBKVMVIRTIOBLK_CINCLUDES-y    += -I$(UK_PLAT_DRIVERS_BASE)/include
+LIBKVMVIRTIOBLK_SRCS-y +=\
+                       $(UK_PLAT_DRIVERS_BASE)/virtio/virtio_blk.c
 
 ##
 ## Virtio 9P library definition
-- 
2.17.1


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