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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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06867a362d
If the Tegra DRM clients are backed by an IOMMU, push buffers are likely to be allocated beyond the 32-bit boundary if sufficient system memory is available. This is problematic on earlier generations of Tegra where host1x supports a maximum of 32 address bits for the GATHER opcode. More recent versions of Tegra (Tegra186 and later) have a wide variant of the GATHER opcode, which allows addressing up to 64 bits of memory. If host1x itself is behind an IOMMU as well this doesn't matter because the IOMMU's input address space is restricted to 32 bits on generations without support for wide GATHER opcodes. However, if host1x is not behind an IOMMU, it won't be able to process push buffers beyond the 32-bit boundary on Tegra generations that don't support wide GATHER opcodes. Restrict the DMA mask to 32 bits on these generations prevents buffers from being allocated from beyond the 32-bit boundary. Signed-off-by: Thierry Reding <treding@nvidia.com>
331 lines
8.8 KiB
C
331 lines
8.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (c) 2012-2015, NVIDIA Corporation.
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*/
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#ifndef HOST1X_DEV_H
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#define HOST1X_DEV_H
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#include <linux/device.h>
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#include <linux/iommu.h>
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#include <linux/iova.h>
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#include <linux/platform_device.h>
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#include <linux/reset.h>
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#include "cdma.h"
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#include "channel.h"
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#include "intr.h"
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#include "job.h"
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#include "syncpt.h"
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struct host1x_syncpt;
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struct host1x_syncpt_base;
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struct host1x_channel;
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struct host1x_cdma;
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struct host1x_job;
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struct push_buffer;
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struct output;
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struct dentry;
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struct host1x_channel_ops {
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int (*init)(struct host1x_channel *channel, struct host1x *host,
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unsigned int id);
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int (*submit)(struct host1x_job *job);
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};
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struct host1x_cdma_ops {
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void (*start)(struct host1x_cdma *cdma);
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void (*stop)(struct host1x_cdma *cdma);
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void (*flush)(struct host1x_cdma *cdma);
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int (*timeout_init)(struct host1x_cdma *cdma, unsigned int syncpt);
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void (*timeout_destroy)(struct host1x_cdma *cdma);
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void (*freeze)(struct host1x_cdma *cdma);
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void (*resume)(struct host1x_cdma *cdma, u32 getptr);
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void (*timeout_cpu_incr)(struct host1x_cdma *cdma, u32 getptr,
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u32 syncpt_incrs, u32 syncval, u32 nr_slots);
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};
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struct host1x_pushbuffer_ops {
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void (*init)(struct push_buffer *pb);
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};
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struct host1x_debug_ops {
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void (*debug_init)(struct dentry *de);
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void (*show_channel_cdma)(struct host1x *host,
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struct host1x_channel *ch,
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struct output *o);
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void (*show_channel_fifo)(struct host1x *host,
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struct host1x_channel *ch,
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struct output *o);
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void (*show_mlocks)(struct host1x *host, struct output *output);
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};
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struct host1x_syncpt_ops {
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void (*restore)(struct host1x_syncpt *syncpt);
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void (*restore_wait_base)(struct host1x_syncpt *syncpt);
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void (*load_wait_base)(struct host1x_syncpt *syncpt);
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u32 (*load)(struct host1x_syncpt *syncpt);
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int (*cpu_incr)(struct host1x_syncpt *syncpt);
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void (*assign_to_channel)(struct host1x_syncpt *syncpt,
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struct host1x_channel *channel);
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void (*enable_protection)(struct host1x *host);
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};
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struct host1x_intr_ops {
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int (*init_host_sync)(struct host1x *host, u32 cpm,
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void (*syncpt_thresh_work)(struct work_struct *work));
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void (*set_syncpt_threshold)(
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struct host1x *host, unsigned int id, u32 thresh);
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void (*enable_syncpt_intr)(struct host1x *host, unsigned int id);
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void (*disable_syncpt_intr)(struct host1x *host, unsigned int id);
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void (*disable_all_syncpt_intrs)(struct host1x *host);
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int (*free_syncpt_irq)(struct host1x *host);
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};
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struct host1x_sid_entry {
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unsigned int base;
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unsigned int offset;
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unsigned int limit;
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};
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struct host1x_info {
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unsigned int nb_channels; /* host1x: number of channels supported */
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unsigned int nb_pts; /* host1x: number of syncpoints supported */
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unsigned int nb_bases; /* host1x: number of syncpoint bases supported */
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unsigned int nb_mlocks; /* host1x: number of mlocks supported */
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int (*init)(struct host1x *host1x); /* initialize per SoC ops */
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unsigned int sync_offset; /* offset of syncpoint registers */
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u64 dma_mask; /* mask of addressable memory */
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bool has_wide_gather; /* supports GATHER_W opcode */
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bool has_hypervisor; /* has hypervisor registers */
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unsigned int num_sid_entries;
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const struct host1x_sid_entry *sid_table;
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};
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struct host1x {
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const struct host1x_info *info;
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void __iomem *regs;
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void __iomem *hv_regs; /* hypervisor region */
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struct host1x_syncpt *syncpt;
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struct host1x_syncpt_base *bases;
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struct device *dev;
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struct clk *clk;
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struct reset_control *rst;
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struct iommu_group *group;
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struct iommu_domain *domain;
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struct iova_domain iova;
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dma_addr_t iova_end;
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struct mutex intr_mutex;
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int intr_syncpt_irq;
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const struct host1x_syncpt_ops *syncpt_op;
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const struct host1x_intr_ops *intr_op;
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const struct host1x_channel_ops *channel_op;
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const struct host1x_cdma_ops *cdma_op;
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const struct host1x_pushbuffer_ops *cdma_pb_op;
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const struct host1x_debug_ops *debug_op;
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struct host1x_syncpt *nop_sp;
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struct mutex syncpt_mutex;
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struct host1x_channel_list channel_list;
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struct dentry *debugfs;
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struct mutex devices_lock;
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struct list_head devices;
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struct list_head list;
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struct device_dma_parameters dma_parms;
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};
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void host1x_hypervisor_writel(struct host1x *host1x, u32 r, u32 v);
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u32 host1x_hypervisor_readl(struct host1x *host1x, u32 r);
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void host1x_sync_writel(struct host1x *host1x, u32 r, u32 v);
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u32 host1x_sync_readl(struct host1x *host1x, u32 r);
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void host1x_ch_writel(struct host1x_channel *ch, u32 r, u32 v);
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u32 host1x_ch_readl(struct host1x_channel *ch, u32 r);
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static inline void host1x_hw_syncpt_restore(struct host1x *host,
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struct host1x_syncpt *sp)
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{
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host->syncpt_op->restore(sp);
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}
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static inline void host1x_hw_syncpt_restore_wait_base(struct host1x *host,
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struct host1x_syncpt *sp)
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{
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host->syncpt_op->restore_wait_base(sp);
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}
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static inline void host1x_hw_syncpt_load_wait_base(struct host1x *host,
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struct host1x_syncpt *sp)
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{
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host->syncpt_op->load_wait_base(sp);
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}
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static inline u32 host1x_hw_syncpt_load(struct host1x *host,
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struct host1x_syncpt *sp)
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{
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return host->syncpt_op->load(sp);
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}
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static inline int host1x_hw_syncpt_cpu_incr(struct host1x *host,
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struct host1x_syncpt *sp)
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{
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return host->syncpt_op->cpu_incr(sp);
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}
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static inline void host1x_hw_syncpt_assign_to_channel(
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struct host1x *host, struct host1x_syncpt *sp,
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struct host1x_channel *ch)
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{
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return host->syncpt_op->assign_to_channel(sp, ch);
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}
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static inline void host1x_hw_syncpt_enable_protection(struct host1x *host)
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{
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return host->syncpt_op->enable_protection(host);
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}
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static inline int host1x_hw_intr_init_host_sync(struct host1x *host, u32 cpm,
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void (*syncpt_thresh_work)(struct work_struct *))
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{
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return host->intr_op->init_host_sync(host, cpm, syncpt_thresh_work);
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}
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static inline void host1x_hw_intr_set_syncpt_threshold(struct host1x *host,
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unsigned int id,
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u32 thresh)
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{
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host->intr_op->set_syncpt_threshold(host, id, thresh);
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}
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static inline void host1x_hw_intr_enable_syncpt_intr(struct host1x *host,
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unsigned int id)
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{
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host->intr_op->enable_syncpt_intr(host, id);
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}
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static inline void host1x_hw_intr_disable_syncpt_intr(struct host1x *host,
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unsigned int id)
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{
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host->intr_op->disable_syncpt_intr(host, id);
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}
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static inline void host1x_hw_intr_disable_all_syncpt_intrs(struct host1x *host)
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{
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host->intr_op->disable_all_syncpt_intrs(host);
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}
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static inline int host1x_hw_intr_free_syncpt_irq(struct host1x *host)
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{
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return host->intr_op->free_syncpt_irq(host);
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}
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static inline int host1x_hw_channel_init(struct host1x *host,
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struct host1x_channel *channel,
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unsigned int id)
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{
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return host->channel_op->init(channel, host, id);
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}
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static inline int host1x_hw_channel_submit(struct host1x *host,
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struct host1x_job *job)
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{
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return host->channel_op->submit(job);
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}
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static inline void host1x_hw_cdma_start(struct host1x *host,
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struct host1x_cdma *cdma)
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{
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host->cdma_op->start(cdma);
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}
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static inline void host1x_hw_cdma_stop(struct host1x *host,
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struct host1x_cdma *cdma)
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{
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host->cdma_op->stop(cdma);
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}
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static inline void host1x_hw_cdma_flush(struct host1x *host,
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struct host1x_cdma *cdma)
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{
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host->cdma_op->flush(cdma);
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}
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static inline int host1x_hw_cdma_timeout_init(struct host1x *host,
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struct host1x_cdma *cdma,
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unsigned int syncpt)
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{
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return host->cdma_op->timeout_init(cdma, syncpt);
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}
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static inline void host1x_hw_cdma_timeout_destroy(struct host1x *host,
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struct host1x_cdma *cdma)
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{
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host->cdma_op->timeout_destroy(cdma);
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}
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static inline void host1x_hw_cdma_freeze(struct host1x *host,
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struct host1x_cdma *cdma)
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{
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host->cdma_op->freeze(cdma);
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}
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static inline void host1x_hw_cdma_resume(struct host1x *host,
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struct host1x_cdma *cdma, u32 getptr)
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{
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host->cdma_op->resume(cdma, getptr);
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}
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static inline void host1x_hw_cdma_timeout_cpu_incr(struct host1x *host,
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struct host1x_cdma *cdma,
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u32 getptr,
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u32 syncpt_incrs,
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u32 syncval, u32 nr_slots)
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{
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host->cdma_op->timeout_cpu_incr(cdma, getptr, syncpt_incrs, syncval,
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nr_slots);
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}
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static inline void host1x_hw_pushbuffer_init(struct host1x *host,
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struct push_buffer *pb)
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{
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host->cdma_pb_op->init(pb);
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}
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static inline void host1x_hw_debug_init(struct host1x *host, struct dentry *de)
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{
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if (host->debug_op && host->debug_op->debug_init)
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host->debug_op->debug_init(de);
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}
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static inline void host1x_hw_show_channel_cdma(struct host1x *host,
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struct host1x_channel *channel,
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struct output *o)
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{
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host->debug_op->show_channel_cdma(host, channel, o);
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}
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static inline void host1x_hw_show_channel_fifo(struct host1x *host,
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struct host1x_channel *channel,
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struct output *o)
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{
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host->debug_op->show_channel_fifo(host, channel, o);
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}
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static inline void host1x_hw_show_mlocks(struct host1x *host, struct output *o)
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{
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host->debug_op->show_mlocks(host, o);
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}
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extern struct platform_driver tegra_mipi_driver;
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#endif
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