Adding upstream version 4.19.249.upstream/4.19.249upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 140 insertions, 0 deletions

diff --git a/drivers/misc/mic/bus/vop_bus.h b/drivers/misc/mic/bus/vop_bus.h
new file mode 100644
index 000000000..fff7a865d
--- /dev/null
+++ b/drivers/misc/mic/bus/vop_bus.h
@@ -0,0 +1,140 @@
+/*
+ * Intel MIC Platform Software Stack (MPSS)
+ *
+ * Copyright(c) 2016 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 Virtio over PCIe Bus driver.
+ */
+#ifndef _VOP_BUS_H_
+#define _VOP_BUS_H_
+/*
+ * Everything a vop driver needs to work with any particular vop
+ * implementation.
+ */
+#include <linux/dmaengine.h>
+#include <linux/interrupt.h>
+
+#include "../common/mic_dev.h"
+
+struct vop_device_id {
+	u32 device;
+	u32 vendor;
+};
+
+#define VOP_DEV_TRNSP 1
+#define VOP_DEV_ANY_ID 0xffffffff
+/*
+ * Size of the internal buffer used during DMA's as an intermediate buffer
+ * for copy to/from user. Must be an integral number of pages.
+ */
+#define VOP_INT_DMA_BUF_SIZE PAGE_ALIGN(64 * 1024ULL)
+
+/**
+ * vop_device - representation of a device using vop
+ * @hw_ops: the hardware ops supported by this device.
+ * @id: the device type identification (used to match it with a driver).
+ * @dev: underlying device.
+ * @dnode - The destination node which this device will communicate with.
+ * @aper: Aperture memory window
+ * @dma_ch - DMA channel
+ * @index: unique position on the vop bus
+ */
+struct vop_device {
+	struct vop_hw_ops *hw_ops;
+	struct vop_device_id id;
+	struct device dev;
+	u8 dnode;
+	struct mic_mw *aper;
+	struct dma_chan *dma_ch;
+	int index;
+};
+
+/**
+ * vop_driver - operations for a vop I/O driver
+ * @driver: underlying device driver (populate name and owner).
+ * @id_table: the ids serviced by this driver.
+ * @probe: the function to call when a device is found.  Returns 0 or -errno.
+ * @remove: the function to call when a device is removed.
+ */
+struct vop_driver {
+	struct device_driver driver;
+	const struct vop_device_id *id_table;
+	int (*probe)(struct vop_device *dev);
+	void (*remove)(struct vop_device *dev);
+};
+
+/**
+ * vop_hw_ops - Hardware operations for accessing a VOP device on the VOP bus.
+ *
+ * @next_db: Obtain the next available doorbell.
+ * @request_irq: Request an interrupt on a particular doorbell.
+ * @free_irq: Free an interrupt requested previously.
+ * @ack_interrupt: acknowledge an interrupt in the ISR.
+ * @get_remote_dp: Get access to the virtio device page used by the remote
+ *                 node to add/remove/configure virtio devices.
+ * @get_dp: Get access to the virtio device page used by the self
+ *          node to add/remove/configure virtio devices.
+ * @send_intr: Send an interrupt to the peer node on a specified doorbell.
+ * @ioremap: Map a buffer with the specified DMA address and length.
+ * @iounmap: Unmap a buffer previously mapped.
+ * @dma_filter: The DMA filter function to use for obtaining access to
+ *		a DMA channel on the peer node.
+ */
+struct vop_hw_ops {
+	int (*next_db)(struct vop_device *vpdev);
+	struct mic_irq *(*request_irq)(struct vop_device *vpdev,
+				       irqreturn_t (*func)(int irq, void *data),
+				       const char *name, void *data,
+				       int intr_src);
+	void (*free_irq)(struct vop_device *vpdev,
+			 struct mic_irq *cookie, void *data);
+	void (*ack_interrupt)(struct vop_device *vpdev, int num);
+	void __iomem * (*get_remote_dp)(struct vop_device *vpdev);
+	void * (*get_dp)(struct vop_device *vpdev);
+	void (*send_intr)(struct vop_device *vpdev, int db);
+	void __iomem * (*ioremap)(struct vop_device *vpdev,
+				  dma_addr_t pa, size_t len);
+	void (*iounmap)(struct vop_device *vpdev, void __iomem *va);
+};
+
+struct vop_device *
+vop_register_device(struct device *pdev, int id,
+		    const struct dma_map_ops *dma_ops,
+		    struct vop_hw_ops *hw_ops, u8 dnode, struct mic_mw *aper,
+		    struct dma_chan *chan);
+void vop_unregister_device(struct vop_device *dev);
+int vop_register_driver(struct vop_driver *drv);
+void vop_unregister_driver(struct vop_driver *drv);
+
+/*
+ * module_vop_driver() - Helper macro for drivers that don't do
+ * anything special in module init/exit.  This eliminates a lot of
+ * boilerplate.  Each module may only use this macro once, and
+ * calling it replaces module_init() and module_exit()
+ */
+#define module_vop_driver(__vop_driver) \
+	module_driver(__vop_driver, vop_register_driver, \
+			vop_unregister_driver)
+
+static inline struct vop_device *dev_to_vop(struct device *dev)
+{
+	return container_of(dev, struct vop_device, dev);
+}
+
+static inline struct vop_driver *drv_to_vop(struct device_driver *drv)
+{
+	return container_of(drv, struct vop_driver, driver);
+}
+#endif /* _VOP_BUS_H */