Cedric Roux
56c66c09aa
Pre-ci test passed git-svn-id: http://svn.eurecom.fr/openair4G/trunk@4000 818b1a75-f10b-46b9-bf7c-635c3b92a50f
53 lines
946 B
C
53 lines
946 B
C
#include "em1_drv.h"
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int em1_mmap(struct file *filp, struct vm_area_struct *vma)
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{
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int i;
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struct em1_file_s *fpv = filp->private_data;
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struct em1_mmap_ctx * mctx;
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size_t size = vma->vm_end - vma->vm_start;
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void * virt;
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dma_addr_t phys;
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printk(KERN_DEBUG "exmimo1 : mmap()\n");
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if (vma->vm_end <= vma->vm_start)
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return -EINVAL;
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for (i = 0; i < MAX_EM1_MMAP; i++)
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{
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mctx = fpv->mmap_list + i;
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if (mctx->virt == 0)
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break;
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}
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if (i == MAX_EM1_MMAP)
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return -ENOMEM;
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virt = pci_alloc_consistent(fpv->pv->pdev, size, &phys);
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if (virt < 0)
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return -EINVAL;
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if (remap_pfn_range(vma, vma->vm_start, phys >> PAGE_SHIFT, size, vma->vm_page_prot))
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return -EAGAIN;
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mctx->virt = virt;
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mctx->phys = phys;
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mctx->size = size;
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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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