405f55712d
* Remove smp_lock.h from files which don't need it (including some headers!) * Add smp_lock.h to files which do need it * Make smp_lock.h include conditional in hardirq.h It's needed only for one kernel_locked() usage which is under CONFIG_PREEMPT This will make hardirq.h inclusion cheaper for every PREEMPT=n config (which includes allmodconfig/allyesconfig, BTW) Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
134 lines
3.2 KiB
C
134 lines
3.2 KiB
C
/* Copyright (C) 2005-2006 by Texas Instruments */
|
|
|
|
#ifndef _CPPI_DMA_H_
|
|
#define _CPPI_DMA_H_
|
|
|
|
#include <linux/slab.h>
|
|
#include <linux/list.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/dmapool.h>
|
|
|
|
#include "musb_dma.h"
|
|
#include "musb_core.h"
|
|
|
|
|
|
/* FIXME fully isolate CPPI from DaVinci ... the "CPPI generic" registers
|
|
* would seem to be shared with the TUSB6020 (over VLYNQ).
|
|
*/
|
|
|
|
#include "davinci.h"
|
|
|
|
|
|
/* CPPI RX/TX state RAM */
|
|
|
|
struct cppi_tx_stateram {
|
|
u32 tx_head; /* "DMA packet" head descriptor */
|
|
u32 tx_buf;
|
|
u32 tx_current; /* current descriptor */
|
|
u32 tx_buf_current;
|
|
u32 tx_info; /* flags, remaining buflen */
|
|
u32 tx_rem_len;
|
|
u32 tx_dummy; /* unused */
|
|
u32 tx_complete;
|
|
};
|
|
|
|
struct cppi_rx_stateram {
|
|
u32 rx_skipbytes;
|
|
u32 rx_head;
|
|
u32 rx_sop; /* "DMA packet" head descriptor */
|
|
u32 rx_current; /* current descriptor */
|
|
u32 rx_buf_current;
|
|
u32 rx_len_len;
|
|
u32 rx_cnt_cnt;
|
|
u32 rx_complete;
|
|
};
|
|
|
|
/* hw_options bits in CPPI buffer descriptors */
|
|
#define CPPI_SOP_SET ((u32)(1 << 31))
|
|
#define CPPI_EOP_SET ((u32)(1 << 30))
|
|
#define CPPI_OWN_SET ((u32)(1 << 29)) /* owned by cppi */
|
|
#define CPPI_EOQ_MASK ((u32)(1 << 28))
|
|
#define CPPI_ZERO_SET ((u32)(1 << 23)) /* rx saw zlp; tx issues one */
|
|
#define CPPI_RXABT_MASK ((u32)(1 << 19)) /* need more rx buffers */
|
|
|
|
#define CPPI_RECV_PKTLEN_MASK 0xFFFF
|
|
#define CPPI_BUFFER_LEN_MASK 0xFFFF
|
|
|
|
#define CPPI_TEAR_READY ((u32)(1 << 31))
|
|
|
|
/* CPPI data structure definitions */
|
|
|
|
#define CPPI_DESCRIPTOR_ALIGN 16 /* bytes; 5-dec docs say 4-byte align */
|
|
|
|
struct cppi_descriptor {
|
|
/* hardware overlay */
|
|
u32 hw_next; /* next buffer descriptor Pointer */
|
|
u32 hw_bufp; /* i/o buffer pointer */
|
|
u32 hw_off_len; /* buffer_offset16, buffer_length16 */
|
|
u32 hw_options; /* flags: SOP, EOP etc*/
|
|
|
|
struct cppi_descriptor *next;
|
|
dma_addr_t dma; /* address of this descriptor */
|
|
u32 buflen; /* for RX: original buffer length */
|
|
} __attribute__ ((aligned(CPPI_DESCRIPTOR_ALIGN)));
|
|
|
|
|
|
struct cppi;
|
|
|
|
/* CPPI Channel Control structure */
|
|
struct cppi_channel {
|
|
struct dma_channel channel;
|
|
|
|
/* back pointer to the DMA controller structure */
|
|
struct cppi *controller;
|
|
|
|
/* which direction of which endpoint? */
|
|
struct musb_hw_ep *hw_ep;
|
|
bool transmit;
|
|
u8 index;
|
|
|
|
/* DMA modes: RNDIS or "transparent" */
|
|
u8 is_rndis;
|
|
|
|
/* book keeping for current transfer request */
|
|
dma_addr_t buf_dma;
|
|
u32 buf_len;
|
|
u32 maxpacket;
|
|
u32 offset; /* dma requested */
|
|
|
|
void __iomem *state_ram; /* CPPI state */
|
|
|
|
struct cppi_descriptor *freelist;
|
|
|
|
/* BD management fields */
|
|
struct cppi_descriptor *head;
|
|
struct cppi_descriptor *tail;
|
|
struct cppi_descriptor *last_processed;
|
|
|
|
/* use tx_complete in host role to track endpoints waiting for
|
|
* FIFONOTEMPTY to clear.
|
|
*/
|
|
struct list_head tx_complete;
|
|
};
|
|
|
|
/* CPPI DMA controller object */
|
|
struct cppi {
|
|
struct dma_controller controller;
|
|
struct musb *musb;
|
|
void __iomem *mregs; /* Mentor regs */
|
|
void __iomem *tibase; /* TI/CPPI regs */
|
|
|
|
int irq;
|
|
|
|
struct cppi_channel tx[4];
|
|
struct cppi_channel rx[4];
|
|
|
|
struct dma_pool *pool;
|
|
|
|
struct list_head tx_complete;
|
|
};
|
|
|
|
/* CPPI IRQ handler */
|
|
extern irqreturn_t cppi_interrupt(int, void *);
|
|
|
|
#endif /* end of ifndef _CPPI_DMA_H_ */
|