C++ (Cpp) dvma_vmetov Examples

Example #1

/* clean up after our dma is done */
static int sun3scsi_dma_finish(int write_flag)
{
	unsigned short fifo;
	int ret = 0;

	sun3_dma_active = 0;

	dregs->csr &= ~CSR_DMA_ENABLE;

	fifo = dregs->fifo_count;
	if(write_flag) {
		if((fifo > 0) && (fifo < sun3_dma_orig_count))
			fifo++;
	}

	last_residual = fifo;
#ifdef SUN3_SCSI_DEBUG
	printk("scsi: residual %x total %x\n", fifo, sun3_dma_orig_count);
#endif
	/* empty bytes from the fifo which didn't make it */
	if((!write_flag) && (dregs->csr & CSR_LEFT)) {
		unsigned char *vaddr;

#ifdef SUN3_SCSI_DEBUG
		printk("scsi: got left over bytes\n");
#endif

		vaddr = (unsigned char *)dvma_vmetov(sun3_dma_orig_addr);

		vaddr += (sun3_dma_orig_count - fifo);
		vaddr--;

		switch(dregs->csr & CSR_LEFT) {
		case CSR_LEFT_3:
			*vaddr = (dregs->bpack_lo & 0xff00) >> 8;
			vaddr--;

		case CSR_LEFT_2:
			*vaddr = (dregs->bpack_hi & 0x00ff);
			vaddr--;

		case CSR_LEFT_1:
			*vaddr = (dregs->bpack_hi & 0xff00) >> 8;
			break;
		}


	}

Example #2

File: sun3_scsi.c Project: 19Dan01/linux

/* clean up after our dma is done */
static int sun3scsi_dma_finish(int write_flag)
{
	unsigned short __maybe_unused count;
	unsigned short fifo;
	int ret = 0;
	
	sun3_dma_active = 0;

#ifdef SUN3_SCSI_VME
	dregs->csr &= ~CSR_DMA_ENABLE;

	fifo = dregs->fifo_count;
	if (write_flag) {
		if ((fifo > 0) && (fifo < sun3_dma_orig_count))
			fifo++;
	}

	last_residual = fifo;
	/* empty bytes from the fifo which didn't make it */
	if ((!write_flag) && (dregs->csr & CSR_LEFT)) {
		unsigned char *vaddr;

		vaddr = (unsigned char *)dvma_vmetov(sun3_dma_orig_addr);

		vaddr += (sun3_dma_orig_count - fifo);
		vaddr--;

		switch (dregs->csr & CSR_LEFT) {
		case CSR_LEFT_3:
			*vaddr = (dregs->bpack_lo & 0xff00) >> 8;
			vaddr--;

		case CSR_LEFT_2:
			*vaddr = (dregs->bpack_hi & 0x00ff);
			vaddr--;

		case CSR_LEFT_1:
			*vaddr = (dregs->bpack_hi & 0xff00) >> 8;
			break;
		}
	}