env: add pci_virtio.c

This patch only adds the pci_virtio.c file,
without changing any functionality. This
is required for future rte_virtio migration
to SPDK.

Change-Id: I7774cdfdaf8934fde588e25b5db5dd86a9cbfb3f
Signed-off-by: Dariusz Stojaczyk <dariuszx.stojaczyk@intel.com>
Reviewed-on: https://review.gerrithub.io/379484
Tested-by: SPDK Automated Test System <sys_sgsw@intel.com>
Reviewed-by: Daniel Verkamp <daniel.verkamp@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>

include/spdk/env.h

@@ -302,6 +302,7 @@ typedef int (*spdk_pci_enum_cb)(void *enum_ctx, struct spdk_pci_device *pci_dev)
 
 int spdk_pci_nvme_enumerate(spdk_pci_enum_cb enum_cb, void *enum_ctx);
 int spdk_pci_ioat_enumerate(spdk_pci_enum_cb enum_cb, void *enum_ctx);
+int spdk_pci_virtio_enumerate(spdk_pci_enum_cb enum_cb, void *enum_ctx);
 
 struct spdk_pci_device *spdk_pci_get_device(struct spdk_pci_addr *pci_addr);
 
@@ -340,6 +341,8 @@ int spdk_pci_nvme_device_attach(spdk_pci_enum_cb enum_cb, void *enum_ctx,
 				struct spdk_pci_addr *pci_address);
 int spdk_pci_ioat_device_attach(spdk_pci_enum_cb enum_cb, void *enum_ctx,
 				struct spdk_pci_addr *pci_address);
+int spdk_pci_virtio_device_attach(spdk_pci_enum_cb enum_cb, void *enum_ctx,
+				  struct spdk_pci_addr *pci_address);
 
 int spdk_pci_device_cfg_read(struct spdk_pci_device *dev, void *value, uint32_t len,
 			     uint32_t offset);

include/spdk/pci_ids.h

@@ -48,6 +48,7 @@ extern "C" {
 #define SPDK_PCI_VID_INTEL		0x8086
 #define SPDK_PCI_VID_MEMBLAZE		0x1c5f
 #define SPDK_PCI_VID_VIRTUALBOX		0x80ee
+#define SPDK_PCI_VID_VIRTIO		0x1af4
 
 /**
  * PCI class code for NVMe devices.
@@ -114,6 +115,8 @@ extern "C" {
 
 #define PCI_DEVICE_ID_INTEL_IOAT_SKX	0x2021
 
+#define PCI_DEVICE_ID_VIRTIO_SCSI_MODERN 0x1004
+
 #ifdef __cplusplus
 }
 #endif

lib/env_dpdk/Makefile

@@ -36,7 +36,7 @@ include $(SPDK_ROOT_DIR)/mk/spdk.common.mk
 
 CFLAGS += $(ENV_CFLAGS)
 C_SRCS = env.c memory.c pci.c vtophys.c init.c threads.c
-C_SRCS += pci_nvme.c pci_ioat.c
+C_SRCS += pci_nvme.c pci_ioat.c pci_virtio.c
 LIBNAME = env_dpdk
 
 include $(SPDK_ROOT_DIR)/mk/spdk.lib.mk

lib/env_dpdk/pci_virtio.c

@@ -0,0 +1,75 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright (c) Intel Corporation.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "env_internal.h"
+
+#include "spdk/pci_ids.h"
+
+static struct rte_pci_id virtio_pci_driver_id[] = {
+	{ RTE_PCI_DEVICE(SPDK_PCI_VID_VIRTIO, PCI_DEVICE_ID_VIRTIO_SCSI_MODERN) },
+	{ .vendor_id = 0, /* sentinel */ },
+};
+
+static struct spdk_pci_enum_ctx g_virtio_pci_drv = {
+	.driver = {
+		.drv_flags	= RTE_PCI_DRV_NEED_MAPPING,
+		.id_table	= virtio_pci_driver_id,
+#if RTE_VERSION >= RTE_VERSION_NUM(16, 11, 0, 0)
+		.probe		= spdk_pci_device_init,
+		.remove		= spdk_pci_device_fini,
+		.driver.name	= "spdk_virtio",
+#else
+		.devinit	= spdk_pci_device_init,
+		.devuninit	= spdk_pci_device_fini,
+		.name		= "spdk_virtio",
+#endif
+	},
+
+	.cb_fn = NULL,
+	.cb_arg = NULL,
+	.mtx = PTHREAD_MUTEX_INITIALIZER,
+	.is_registered = false,
+};
+
+int
+spdk_pci_virtio_device_attach(spdk_pci_enum_cb enum_cb,
+			      void *enum_ctx, struct spdk_pci_addr *pci_address)
+{
+	return spdk_pci_device_attach(&g_virtio_pci_drv, enum_cb, enum_ctx, pci_address);
+}
+
+int
+spdk_pci_virtio_enumerate(spdk_pci_enum_cb enum_cb, void *enum_ctx)
+{
+	return spdk_pci_enumerate(&g_virtio_pci_drv, enum_cb, enum_ctx);
+}