Cedric Roux
56c66c09aa
Pre-ci test passed git-svn-id: http://svn.eurecom.fr/openair4G/trunk@4000 818b1a75-f10b-46b9-bf7c-635c3b92a50f
86 lines
1.9 KiB
C
86 lines
1.9 KiB
C
#include "em1_drv.h"
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static int em1_ioctl_fifo_write(struct em1_private_s *pv, size_t size, uint32_t *words)
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{
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DECLARE_WAITQUEUE(wait, current);
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int res = -ERESTARTSYS;
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if (!em1_user_op_enter(pv, &wait, &pv->rq_wait_fifo_w,
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EM1_BUSY_FIFO_W, TASK_INTERRUPTIBLE))
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{
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res = em1_fifo_write(pv, words, size);
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res = 0;
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pv->busy &= ~EM1_BUSY_FIFO_W;
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}
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em1_user_op_leave(pv, &wait, &pv->rq_wait_fifo_w);
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return res;
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}
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static int em1_ioctl_fifo_read(struct em1_private_s *pv, size_t size, uint32_t *words)
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{
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DECLARE_WAITQUEUE(wait, current);
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int res = -ERESTARTSYS;
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if (!em1_user_op_enter(pv, &wait, &pv->rq_wait_fifo_r,
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EM1_BUSY_FIFO_R, TASK_INTERRUPTIBLE))
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{
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res = em1_fifo_read(pv, words, size);
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pv->busy &= ~EM1_BUSY_FIFO_R;
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}
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em1_user_op_leave(pv, &wait, &pv->rq_wait_fifo_r);
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return res;
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}
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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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{
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struct em1_file_s *fpv = file->private_data;
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struct em1_private_s *pv = fpv->pv;
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switch ((enum em1_ioctl_cmd)cmd)
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{
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case EM1_IOCTL_FIFO_WRITE: {
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struct em1_ioctl_fifo_params p;
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uint32_t w[EM1_MAX_FIFO_PAYLOAD];
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if (copy_from_user(&p, (void*)arg, sizeof(p)))
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return -EFAULT;
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if (p.count > EM1_MAX_FIFO_PAYLOAD)
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return -EINVAL;
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if (copy_from_user(w, p.words, p.count * sizeof(uint32_t)))
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return -EFAULT;
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return em1_ioctl_fifo_write(pv, p.count, w);
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}
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case EM1_IOCTL_FIFO_READ: {
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struct em1_ioctl_fifo_params p;
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uint32_t w[EM1_MAX_FIFO_PAYLOAD];
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int res;
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if (copy_from_user(&p, (void*)arg, sizeof(p)))
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return -EFAULT;
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if (p.count > EM1_MAX_FIFO_PAYLOAD)
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return -EINVAL;
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res = em1_ioctl_fifo_read(pv, p.count, w);
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if (!res && copy_to_user(p.words, w, p.count * sizeof(uint32_t)))
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return -EFAULT;
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return res;
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}
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}
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return 0;
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}
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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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