cdcm/cdcmPciDmaLynx.c

   1 /**
   2  * @file cdcmPciDmaLynx.c
   3  *
   4  * @brief CDCM PCI DMA implementation for LynxOS
   5  *
   6  * @author Copyright (C) 2009 CERN CO/HT Emilio G. Cota
   7  *                                      <emilio.garcia.cota@cern.ch>
   8  *
   9  * @section license_sec License
  10  * Released under the GPL v2. (and only v2, not any later version)
  11  */
  12 #ifdef __Lynx__
  13
  14 #include "cdcmPciDma.h"
  15 #include <kernel.h>
  16
  17 cdcm_dma_t cdcm_pci_map(void *handle, void *addr, size_t size, int write)
  18 {
  19   unsigned long ptr;
  20   ptr = (unsigned long)addr;
  21   if (ptr < PHYSBASE)
  22     ptr = (unsigned long)get_phys((kaddr_t)addr);
  23   return (cdcm_dma_t)(ptr - PHYSBASE);
  24 }
  25
  26 void cdcm_pci_unmap(void *handle, cdcm_dma_t dma_addr, int size, int write)
  27 {
  28   return;
  29 }
  30
  31 int cdcm_pci_mmchain_lock(void *handle, struct cdcm_dmabuf *dma, int write,
  32                           int pid, void *buf, unsigned long size,
  33                           struct dmachain *out)
  34 {
  35   int err;
  36   int i;
  37   dma->user_buf = (char *)buf;
  38   dma->size = size;
  39   err = mem_lock(pid, dma->user_buf, dma->size);
  40   if (err < 0) return SYSERR;
  41   err = mmchain(out, dma->user_buf, dma->size);
  42   for (i=0; i < err; i++) {
  43     /* get_phys here would be redundant */
  44     out[i].address -= PHYSBASE;
  45   }
  46   return err;
  47 }
  48
  49 int cdcm_pci_mem_unlock(void *handle, struct cdcm_dmabuf *dma, int pid,
  50                         int dirty)
  51 {
  52   return mem_unlock(pid, dma->user_buf, dma->size, dirty);
  53 }
  54
  55 #endif  /* __Lynx__ */