167 lines
5.2 KiB
C
167 lines
5.2 KiB
C
/* $FreeBSD$ */
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/*-
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* Copyright (c) 2008 Hans Petter Selasky. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _USB_BUSDMA_H_
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#define _USB_BUSDMA_H_
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#ifndef USB_GLOBAL_INCLUDE_FILE
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#include <sys/uio.h>
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#include <sys/mbuf.h>
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#include <machine/bus.h>
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#endif
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/* defines */
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#define USB_PAGE_SIZE PAGE_SIZE /* use system PAGE_SIZE */
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#if (__FreeBSD_version >= 700020)
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#define USB_GET_DMA_TAG(dev) bus_get_dma_tag(dev)
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#else
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#define USB_GET_DMA_TAG(dev) NULL /* XXX */
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#endif
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/* structure prototypes */
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struct usb_xfer_root;
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struct usb_dma_parent_tag;
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struct usb_dma_tag;
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/*
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* The following typedef defines the USB DMA load done callback.
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*/
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typedef void (usb_dma_callback_t)(struct usb_dma_parent_tag *udpt);
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/*
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* The following structure defines physical and non kernel virtual
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* address of a memory page having size USB_PAGE_SIZE.
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*/
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struct usb_page {
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#if USB_HAVE_BUSDMA
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bus_addr_t physaddr;
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void *buffer; /* non Kernel Virtual Address */
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#endif
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};
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/*
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* The following structure is used when needing the kernel virtual
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* pointer and the physical address belonging to an offset in an USB
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* page cache.
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*/
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struct usb_page_search {
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void *buffer;
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#if USB_HAVE_BUSDMA
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bus_addr_t physaddr;
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#endif
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usb_size_t length;
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};
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/*
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* The following structure is used to keep information about a DMA
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* memory allocation.
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*/
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struct usb_page_cache {
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#if USB_HAVE_BUSDMA
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bus_dma_tag_t tag;
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bus_dmamap_t map;
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struct usb_page *page_start;
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#endif
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struct usb_dma_parent_tag *tag_parent; /* always set */
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void *buffer; /* virtual buffer pointer */
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#if USB_HAVE_BUSDMA
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usb_size_t page_offset_buf;
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usb_size_t page_offset_end;
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uint8_t isread:1; /* set if we are currently reading
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* from the memory. Else write. */
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uint8_t ismultiseg:1; /* set if we can have multiple
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* segments */
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#endif
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};
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/*
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* The following structure describes the parent USB DMA tag.
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*/
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#if USB_HAVE_BUSDMA
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struct usb_dma_parent_tag {
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struct cv cv[1]; /* internal condition variable */
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bus_dma_tag_t tag; /* always set */
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struct mtx *mtx; /* private mutex, always set */
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usb_dma_callback_t *func; /* load complete callback function */
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struct usb_dma_tag *utag_first;/* pointer to first USB DMA tag */
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uint8_t dma_error; /* set if DMA load operation failed */
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uint8_t dma_bits; /* number of DMA address lines */
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uint8_t utag_max; /* number of USB DMA tags */
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};
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#else
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struct usb_dma_parent_tag {}; /* empty struct */
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#endif
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/*
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* The following structure describes an USB DMA tag.
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*/
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#if USB_HAVE_BUSDMA
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struct usb_dma_tag {
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struct usb_dma_parent_tag *tag_parent;
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bus_dma_tag_t tag;
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usb_size_t align;
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usb_size_t size;
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};
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#else
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struct usb_dma_tag {}; /* empty struct */
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#endif
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/* function prototypes */
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int usb_uiomove(struct usb_page_cache *pc, struct uio *uio,
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usb_frlength_t pc_offset, usb_frlength_t len);
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struct usb_dma_tag *usb_dma_tag_find(struct usb_dma_parent_tag *udpt,
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usb_size_t size, usb_size_t align);
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uint8_t usb_pc_alloc_mem(struct usb_page_cache *pc, struct usb_page *pg,
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usb_size_t size, usb_size_t align);
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uint8_t usb_pc_dmamap_create(struct usb_page_cache *pc, usb_size_t size);
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uint8_t usb_pc_load_mem(struct usb_page_cache *pc, usb_size_t size,
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uint8_t sync);
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void usb_bdma_done_event(struct usb_dma_parent_tag *udpt);
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void usb_bdma_post_sync(struct usb_xfer *xfer);
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void usb_bdma_pre_sync(struct usb_xfer *xfer);
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void usb_bdma_work_loop(struct usb_xfer_queue *pq);
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void usb_dma_tag_setup(struct usb_dma_parent_tag *udpt,
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struct usb_dma_tag *udt, bus_dma_tag_t dmat, struct mtx *mtx,
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usb_dma_callback_t *func, uint8_t ndmabits, uint8_t nudt);
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void usb_dma_tag_unsetup(struct usb_dma_parent_tag *udpt);
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void usb_pc_cpu_flush(struct usb_page_cache *pc);
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void usb_pc_cpu_invalidate(struct usb_page_cache *pc);
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void usb_pc_dmamap_destroy(struct usb_page_cache *pc);
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void usb_pc_free_mem(struct usb_page_cache *pc);
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uint8_t usb_pc_buffer_is_aligned(struct usb_page_cache *pc,
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usb_frlength_t offset, usb_frlength_t len,
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usb_frlength_t mask);
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#endif /* _USB_BUSDMA_H_ */
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