Cedric Roux
56c66c09aa
Pre-ci test passed git-svn-id: http://svn.eurecom.fr/openair4G/trunk@4000 818b1a75-f10b-46b9-bf7c-635c3b92a50f
187 lines
4.5 KiB
C
187 lines
4.5 KiB
C
#ifndef USER_APP
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#include <linux/uaccess.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/fs.h>
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#include <linux/list.h>
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#include <linux/pci.h>
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#include <linux/blkdev.h>
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#include <linux/wait.h>
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#include <linux/sched.h>
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#include <linux/spinlock_types.h>
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#include <linux/interrupt.h>
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/*
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Operations:
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- DMA from pc to em1: The Linux driver writes a 4 words command to
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the control fifo [0x103 phys_hi phys_lo size] and waits for a DMA
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end interrupt from the em1 board.
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This operation is requested by the user application using the
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write syscall. The buffer provided by the application must not
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span across multiple pages.
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- DMA from em1 to pc: The Linux driver writes a 4 words command to
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the control fifo [0x203 phys_hi phys_lo size] and waits for a DMA
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end interrupt from the em1 board.
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This operation is requested by the user application using the read
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syscall. The buffer provided by the application must not span
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across multiple pages.
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*/
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#define XILINX_VENDOR 0x10ee
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#define XILINX_ID 0x0007
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#define REG_FCMD 0x0
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#define REG_FSTATUS 0x4
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#define REG_ISTATUS 0x8
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#define REG_STATUS 0x10
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#define REG_PCI_BASE_L 0x28
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#define REG_PCI_BASE_H 0x2c
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#define PUSH_FULL_STATUS_MSK (1 << 3)
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#define POP_EMPTY_STATUS_MSK (1 << 2)
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#define EM1_NOTFULL_IRQ (1 << 0)
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#define EM1_NOTEMPTY_IRQ (1 << 1)
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#define EM1_DMA_IRQ (1 << 2)
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#define PUSH_NO_FULL_IRQ_MSK (1 << 19)
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#define POP_NO_EMPTY_IRQ_MSK (1 << 18)
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#define IRQ_MSK 7
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#define EM1_CMD_OP_DMA_PC2EM1 0x0100
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#define EM1_CMD_OP_DMA_EM12PC 0x0200
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#define MAX_EM1_DEVICES 8
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#define MAX_EM1_MMAP 4
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#define EM1_BUSY_FIFO_R 1
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#define EM1_BUSY_FIFO_W 2
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#define EM1_BUSY_DMA 4
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struct em1_private_s;
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struct em1_page_s
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{
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uintptr_t addr;
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struct page *page;
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};
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struct em1_mmap_ctx {
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void* virt;
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dma_addr_t phys;
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size_t size;
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};
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struct em1_file_s
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{
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struct em1_private_s *pv;
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struct em1_page_s read;
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struct em1_page_s write;
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struct em1_mmap_ctx mmap_list[MAX_EM1_MMAP];
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};
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struct em1_private_s
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{
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struct pci_dev *pdev;
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struct device *dev;
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spinlock_t lock;
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/* memeory mapped device base address */
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void * base;
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/* wait queues */
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wait_queue_head_t rq_wait_fifo_r;
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wait_queue_head_t rq_wait_fifo_w;
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wait_queue_head_t rq_wait_dma;
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/* Number of fifo words left to read or write */
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size_t fifo_read_left;
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size_t fifo_write_left;
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/* Cached interrupt enabled value */
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uint32_t ie;
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/* Driver busy operations flags */
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int busy;
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/* Completed DMA transfer counters */
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uint16_t dma_started, dma_done;
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};
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extern struct em1_private_s *em1_devices[MAX_EM1_DEVICES];
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/* em1_drv.c */
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#if 0
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static int em1_open(struct inode *inode, struct file *file);
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static int em1_release(struct inode *inode, struct file *file);
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static int __init em1_init(void);
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static void __exit em1_cleanup(void);
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#endif
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int em1_user_op_enter(struct em1_private_s *pv, wait_queue_t *wait,
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wait_queue_head_t *wh, int busy_flag, int new_state);
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void em1_user_op_leave(struct em1_private_s *pv, wait_queue_t *wait,
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wait_queue_head_t *wh);
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/* em1_rw.c: read and write syscalls */
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int em1_lock_user_page(struct em1_page_s *ep, uintptr_t addr, int direction);
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void em1_unlock_user_page(struct em1_page_s *fpv);
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ssize_t em1_write(struct file *file, const char __user *buf, size_t size, loff_t *ppos);
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ssize_t em1_read(struct file *file, char __user *buf, size_t size, loff_t *ppos);
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/* em1_dev.c */
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#if 0
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static irqreturn_t irq_handler(int irq, void *dev_id);
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#endif
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int __devinit em1_probe(struct pci_dev *dev, const struct pci_device_id *id);
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void __devexit em1_remove(struct pci_dev *dev);
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/* em1_fifos.c */
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int em1_fifo_write(struct em1_private_s *pv, const uint32_t *buf, size_t count);
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int em1_fifo_read(struct em1_private_s *pv, uint32_t *buf, size_t count);
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/* em1_ioctl.c */
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int em1_ioctl(struct inode *inode, struct file *file,
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unsigned int cmd, unsigned long arg);
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/* em1_mmap.c */
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int em1_mmap(struct file *filp, struct vm_area_struct *vma);
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#endif
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enum em1_ioctl_cmd
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{
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EM1_IOCTL_FIFO_WRITE,
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EM1_IOCTL_FIFO_READ,
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};
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#define EM1_MAX_FIFO_PAYLOAD 128
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struct em1_ioctl_fifo_params
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{
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uint32_t *words;
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size_t count;
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};
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#if 0
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static int em1_ioctl_fifo_write(struct em1_private_s *pv,
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struct em1_ioctl_fifo_params *p);
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static int em1_ioctl_fifo_read(struct em1_private_s *pv,
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struct em1_ioctl_fifo_params *p);
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static int em1_ioctl_alloc(struct em1_private_s *pv, void **buf);
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#endif
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/*
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* Local Variables:
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* c-file-style: "linux"
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* indent-tabs-mode: t
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* tab-width: 8
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* End:
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*/
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