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On Gen2 hardware the VSP1 is a bus master and accesses the display list and video buffers through DMA directly. On Gen3 hardware, however, memory accesses go through a separate IP core called FCP. The VSP1 driver unconditionally maps DMA buffers through the VSP device. While this doesn't cause any practical issue so far, DMA mappings will be incorrect as soon as we will enable IOMMU support for the FCP on Gen3 platforms, resulting in IOMMU faults. Fix this by mapping all buffers through the FCP device if present, and through the VSP1 device as usual otherwise. Suggested-by: Magnus Damm <magnus.damm@gmail.com> [Cache the bus master device] Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com> Acked-by: Mauro Cavalho Chehab <mchehab@s-opensource.com>
118 lines
2.6 KiB
C
118 lines
2.6 KiB
C
/*
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* vsp1.h -- R-Car VSP1 Driver
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*
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* Copyright (C) 2013-2014 Renesas Electronics Corporation
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*
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* Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#ifndef __VSP1_H__
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#define __VSP1_H__
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#include <linux/io.h>
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#include <linux/list.h>
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#include <linux/mutex.h>
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#include <media/media-device.h>
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#include <media/v4l2-device.h>
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#include <media/v4l2-subdev.h>
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#include "vsp1_regs.h"
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struct clk;
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struct device;
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struct rcar_fcp_device;
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struct vsp1_drm;
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struct vsp1_entity;
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struct vsp1_platform_data;
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struct vsp1_bru;
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struct vsp1_clu;
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struct vsp1_hgo;
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struct vsp1_hgt;
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struct vsp1_hsit;
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struct vsp1_lif;
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struct vsp1_lut;
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struct vsp1_rwpf;
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struct vsp1_sru;
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struct vsp1_uds;
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#define VSP1_MAX_RPF 5
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#define VSP1_MAX_UDS 3
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#define VSP1_MAX_WPF 4
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#define VSP1_HAS_LIF (1 << 0)
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#define VSP1_HAS_LUT (1 << 1)
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#define VSP1_HAS_SRU (1 << 2)
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#define VSP1_HAS_BRU (1 << 3)
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#define VSP1_HAS_CLU (1 << 4)
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#define VSP1_HAS_WPF_VFLIP (1 << 5)
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#define VSP1_HAS_WPF_HFLIP (1 << 6)
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#define VSP1_HAS_HGO (1 << 7)
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#define VSP1_HAS_HGT (1 << 8)
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struct vsp1_device_info {
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u32 version;
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const char *model;
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unsigned int gen;
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unsigned int features;
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unsigned int rpf_count;
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unsigned int uds_count;
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unsigned int wpf_count;
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unsigned int num_bru_inputs;
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bool uapi;
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};
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struct vsp1_device {
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struct device *dev;
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const struct vsp1_device_info *info;
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u32 version;
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void __iomem *mmio;
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struct rcar_fcp_device *fcp;
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struct device *bus_master;
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struct vsp1_bru *bru;
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struct vsp1_clu *clu;
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struct vsp1_hgo *hgo;
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struct vsp1_hgt *hgt;
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struct vsp1_hsit *hsi;
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struct vsp1_hsit *hst;
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struct vsp1_lif *lif;
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struct vsp1_lut *lut;
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struct vsp1_rwpf *rpf[VSP1_MAX_RPF];
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struct vsp1_sru *sru;
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struct vsp1_uds *uds[VSP1_MAX_UDS];
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struct vsp1_rwpf *wpf[VSP1_MAX_WPF];
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struct list_head entities;
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struct list_head videos;
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struct v4l2_device v4l2_dev;
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struct media_device media_dev;
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struct media_entity_operations media_ops;
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struct vsp1_drm *drm;
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};
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int vsp1_device_get(struct vsp1_device *vsp1);
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void vsp1_device_put(struct vsp1_device *vsp1);
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int vsp1_reset_wpf(struct vsp1_device *vsp1, unsigned int index);
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static inline u32 vsp1_read(struct vsp1_device *vsp1, u32 reg)
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{
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return ioread32(vsp1->mmio + reg);
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}
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static inline void vsp1_write(struct vsp1_device *vsp1, u32 reg, u32 data)
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{
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iowrite32(data, vsp1->mmio + reg);
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}
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#endif /* __VSP1_H__ */
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