diff options
Diffstat (limited to 'drivers/usb/mon/mon_dma.c')
| -rw-r--r-- | drivers/usb/mon/mon_dma.c | 39 |
1 files changed, 38 insertions, 1 deletions
diff --git a/drivers/usb/mon/mon_dma.c b/drivers/usb/mon/mon_dma.c index ddcfc01e77a0..140cc80bd2b1 100644 --- a/drivers/usb/mon/mon_dma.c +++ b/drivers/usb/mon/mon_dma.c @@ -48,6 +48,36 @@ char mon_dmapeek(unsigned char *dst, dma_addr_t dma_addr, int len) local_irq_restore(flags); return 0; } + +void mon_dmapeek_vec(const struct mon_reader_bin *rp, + unsigned int offset, dma_addr_t dma_addr, unsigned int length) +{ + unsigned long flags; + unsigned int step_len; + struct page *pg; + unsigned char *map; + unsigned long page_off, page_len; + + local_irq_save(flags); + while (length) { + /* compute number of bytes we are going to copy in this page */ + step_len = length; + page_off = dma_addr & (PAGE_SIZE-1); + page_len = PAGE_SIZE - page_off; + if (page_len < step_len) + step_len = page_len; + + /* copy data and advance pointers */ + pg = phys_to_page(dma_addr); + map = kmap_atomic(pg, KM_IRQ0); + offset = mon_copy_to_buff(rp, offset, map + page_off, step_len); + kunmap_atomic(map, KM_IRQ0); + dma_addr += step_len; + length -= step_len; + } + local_irq_restore(flags); +} + #endif /* __i386__ */ #ifndef MON_HAS_UNMAP @@ -55,4 +85,11 @@ char mon_dmapeek(unsigned char *dst, dma_addr_t dma_addr, int len) { return 'D'; } -#endif + +void mon_dmapeek_vec(const struct mon_reader_bin *rp, + unsigned int offset, dma_addr_t dma_addr, unsigned int length) +{ + ; +} + +#endif /* MON_HAS_UNMAP */ |