misc: mic: Remove MIC X100 host virtio functionality

This patch deletes the virtio functionality from the MIC X100 host
driver. A subsequent patch will re-enable this functionality by
consolidating the hardware independent logic in a new Virtio over PCIe
(VOP) driver.

Reviewed-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Signed-off-by: Sudeep Dutt <sudeep.dutt@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 0 insertions, 155 deletions

diff --git a/drivers/misc/mic/host/mic_virtio.h b/drivers/misc/mic/host/mic_virtio.h
deleted file mode 100644
index a80631f2790d..000000000000
--- a/drivers/misc/mic/host/mic_virtio.h
+++ /dev/null
@@ -1,155 +0,0 @@
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2013 Intel Corporation.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License, version 2, as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * The full GNU General Public License is included in this distribution in
- * the file called "COPYING".
- *
- * Intel MIC Host driver.
- *
- */
-#ifndef MIC_VIRTIO_H
-#define MIC_VIRTIO_H
-
-#include <linux/virtio_config.h>
-#include <linux/mic_ioctl.h>
-
-/*
- * Note on endianness.
- * 1. Host can be both BE or LE
- * 2. Guest/card is LE. Host uses le_to_cpu to access desc/avail
- *    rings and ioreadXX/iowriteXX to access used ring.
- * 3. Device page exposed by host to guest contains LE values. Guest
- *    accesses these using ioreadXX/iowriteXX etc. This way in general we
- *    obey the virtio spec according to which guest works with native
- *    endianness and host is aware of guest endianness and does all
- *    required endianness conversion.
- * 4. Data provided from user space to guest (in ADD_DEVICE and
- *    CONFIG_CHANGE ioctl's) is not interpreted by the driver and should be
- *    in guest endianness.
- */
-
-/**
- * struct mic_vringh - Virtio ring host information.
- *
- * @vring: The MIC vring used for setting up user space mappings.
- * @vrh: The host VRINGH used for accessing the card vrings.
- * @riov: The VRINGH read kernel IOV.
- * @wiov: The VRINGH write kernel IOV.
- * @vr_mutex: Mutex for synchronizing access to the VRING.
- * @buf: Temporary kernel buffer used to copy in/out data
- * from/to the card via DMA.
- * @buf_da: dma address of buf.
- * @mvdev: Back pointer to MIC virtio device for vringh_notify(..).
- * @head: The VRINGH head index address passed to vringh_getdesc_kern(..).
- */
-struct mic_vringh {
-	struct mic_vring vring;
-	struct vringh vrh;
-	struct vringh_kiov riov;
-	struct vringh_kiov wiov;
-	struct mutex vr_mutex;
-	void *buf;
-	dma_addr_t buf_da;
-	struct mic_vdev *mvdev;
-	u16 head;
-};
-
-/**
- * struct mic_vdev - Host information for a card Virtio device.
- *
- * @virtio_id - Virtio device id.
- * @waitq - Waitqueue to allow ring3 apps to poll.
- * @mdev - Back pointer to host MIC device.
- * @poll_wake - Used for waking up threads blocked in poll.
- * @out_bytes - Debug stats for number of bytes copied from host to card.
- * @in_bytes - Debug stats for number of bytes copied from card to host.
- * @out_bytes_dma - Debug stats for number of bytes copied from host to card
- * using DMA.
- * @in_bytes_dma - Debug stats for number of bytes copied from card to host
- * using DMA.
- * @tx_len_unaligned - Debug stats for number of bytes copied to the card where
- * the transfer length did not have the required DMA alignment.
- * @tx_dst_unaligned - Debug stats for number of bytes copied where the
- * destination address on the card did not have the required DMA alignment.
- * @mvr - Store per VRING data structures.
- * @virtio_bh_work - Work struct used to schedule virtio bottom half handling.
- * @dd - Virtio device descriptor.
- * @dc - Virtio device control fields.
- * @list - List of Virtio devices.
- * @virtio_db - The doorbell used by the card to interrupt the host.
- * @virtio_cookie - The cookie returned while requesting interrupts.
- */
-struct mic_vdev {
-	int virtio_id;
-	wait_queue_head_t waitq;
-	struct mic_device *mdev;
-	int poll_wake;
-	unsigned long out_bytes;
-	unsigned long in_bytes;
-	unsigned long out_bytes_dma;
-	unsigned long in_bytes_dma;
-	unsigned long tx_len_unaligned;
-	unsigned long tx_dst_unaligned;
-	struct mic_vringh mvr[MIC_MAX_VRINGS];
-	struct work_struct virtio_bh_work;
-	struct mic_device_desc *dd;
-	struct mic_device_ctrl *dc;
-	struct list_head list;
-	int virtio_db;
-	struct mic_irq *virtio_cookie;
-};
-
-void mic_virtio_uninit(struct mic_device *mdev);
-int mic_virtio_add_device(struct mic_vdev *mvdev,
-			void __user *argp);
-void mic_virtio_del_device(struct mic_vdev *mvdev);
-int mic_virtio_config_change(struct mic_vdev *mvdev,
-			void __user *argp);
-int mic_virtio_copy_desc(struct mic_vdev *mvdev,
-	struct mic_copy_desc *request);
-void mic_virtio_reset_devices(struct mic_device *mdev);
-void mic_bh_handler(struct work_struct *work);
-
-/* Helper API to obtain the MIC PCIe device */
-static inline struct device *mic_dev(struct mic_vdev *mvdev)
-{
-	return &mvdev->mdev->pdev->dev;
-}
-
-/* Helper API to check if a virtio device is initialized */
-static inline int mic_vdev_inited(struct mic_vdev *mvdev)
-{
-	/* Device has not been created yet */
-	if (!mvdev->dd || !mvdev->dd->type) {
-		dev_err(mic_dev(mvdev), "%s %d err %d\n",
-			__func__, __LINE__, -EINVAL);
-		return -EINVAL;
-	}
-
-	/* Device has been removed/deleted */
-	if (mvdev->dd->type == -1) {
-		dev_err(mic_dev(mvdev), "%s %d err %d\n",
-			__func__, __LINE__, -ENODEV);
-		return -ENODEV;
-	}
-
-	return 0;
-}
-
-/* Helper API to check if a virtio device is running */
-static inline bool mic_vdevup(struct mic_vdev *mvdev)
-{
-	return !!mvdev->dd->status;
-}
-#endif