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Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms and conditions of the gnu general public license version 2 as published by the free software foundation this program is distributed in the hope 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 you should have received a copy of the gnu general public license along with this program if not see http www gnu org licenses extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 228 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Steve Winslow <swinslow@gmail.com> Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190528171438.107155473@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
93 lines
3.1 KiB
C
93 lines
3.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Tegra host1x Command DMA
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*
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* Copyright (c) 2010-2013, NVIDIA Corporation.
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*/
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#ifndef __HOST1X_CDMA_H
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#define __HOST1X_CDMA_H
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#include <linux/sched.h>
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#include <linux/completion.h>
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#include <linux/list.h>
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struct host1x_syncpt;
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struct host1x_userctx_timeout;
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struct host1x_job;
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/*
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* cdma
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*
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* This is in charge of a host command DMA channel.
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* Sends ops to a push buffer, and takes responsibility for unpinning
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* (& possibly freeing) of memory after those ops have completed.
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* Producer:
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* begin
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* push - send ops to the push buffer
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* end - start command DMA and enqueue handles to be unpinned
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* Consumer:
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* update - call to update sync queue and push buffer, unpin memory
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*/
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struct push_buffer {
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void *mapped; /* mapped pushbuffer memory */
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dma_addr_t dma; /* device address of pushbuffer */
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dma_addr_t phys; /* physical address of pushbuffer */
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u32 fence; /* index we've written */
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u32 pos; /* index to write to */
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u32 size;
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u32 alloc_size;
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};
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struct buffer_timeout {
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struct delayed_work wq; /* work queue */
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bool initialized; /* timer one-time setup flag */
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struct host1x_syncpt *syncpt; /* buffer completion syncpt */
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u32 syncpt_val; /* syncpt value when completed */
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ktime_t start_ktime; /* starting time */
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/* context timeout information */
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struct host1x_client *client;
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};
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enum cdma_event {
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CDMA_EVENT_NONE, /* not waiting for any event */
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CDMA_EVENT_SYNC_QUEUE_EMPTY, /* wait for empty sync queue */
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CDMA_EVENT_PUSH_BUFFER_SPACE /* wait for space in push buffer */
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};
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struct host1x_cdma {
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struct mutex lock; /* controls access to shared state */
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struct completion complete; /* signalled when event occurs */
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enum cdma_event event; /* event that complete is waiting for */
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unsigned int slots_used; /* pb slots used in current submit */
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unsigned int slots_free; /* pb slots free in current submit */
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unsigned int first_get; /* DMAGET value, where submit begins */
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unsigned int last_pos; /* last value written to DMAPUT */
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struct push_buffer push_buffer; /* channel's push buffer */
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struct list_head sync_queue; /* job queue */
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struct buffer_timeout timeout; /* channel's timeout state/wq */
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bool running;
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bool torndown;
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};
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#define cdma_to_channel(cdma) container_of(cdma, struct host1x_channel, cdma)
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#define cdma_to_host1x(cdma) dev_get_drvdata(cdma_to_channel(cdma)->dev->parent)
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#define pb_to_cdma(pb) container_of(pb, struct host1x_cdma, push_buffer)
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int host1x_cdma_init(struct host1x_cdma *cdma);
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int host1x_cdma_deinit(struct host1x_cdma *cdma);
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int host1x_cdma_begin(struct host1x_cdma *cdma, struct host1x_job *job);
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void host1x_cdma_push(struct host1x_cdma *cdma, u32 op1, u32 op2);
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void host1x_cdma_push_wide(struct host1x_cdma *cdma, u32 op1, u32 op2,
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u32 op3, u32 op4);
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void host1x_cdma_end(struct host1x_cdma *cdma, struct host1x_job *job);
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void host1x_cdma_update(struct host1x_cdma *cdma);
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void host1x_cdma_peek(struct host1x_cdma *cdma, u32 dmaget, int slot,
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u32 *out);
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unsigned int host1x_cdma_wait_locked(struct host1x_cdma *cdma,
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enum cdma_event event);
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void host1x_cdma_update_sync_queue(struct host1x_cdma *cdma,
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struct device *dev);
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#endif
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