diff options
Diffstat (limited to 'sys/dev/pci/drm/drm_linux.c')
| -rw-r--r-- | sys/dev/pci/drm/drm_linux.c | 64 |
1 files changed, 63 insertions, 1 deletions
diff --git a/sys/dev/pci/drm/drm_linux.c b/sys/dev/pci/drm/drm_linux.c index 8810360c58c..7939c70570a 100644 --- a/sys/dev/pci/drm/drm_linux.c +++ b/sys/dev/pci/drm/drm_linux.c @@ -1,4 +1,4 @@ -/* $OpenBSD: drm_linux.c,v 1.2 2015/04/06 12:25:10 jsg Exp $ */ +/* $OpenBSD: drm_linux.c,v 1.3 2015/04/08 02:28:13 jsg Exp $ */ /* * Copyright (c) 2013 Jonathan Gray <jsg@openbsd.org> * @@ -117,3 +117,65 @@ dmi_check_system(const struct dmi_system_id *sysid) } return (num); } + +void * +kmap(struct vm_page *pg) +{ + vaddr_t va; + +#if defined (__HAVE_PMAP_DIRECT) + va = pmap_map_direct(pg); +#else + va = uvm_km_valloc_wait(phys_map, PAGE_SIZE); + pmap_kenter_pa(va, VM_PAGE_TO_PHYS(pg), PROT_READ | PROT_WRITE); + pmap_update(pmap_kernel()); +#endif + return (void *)va; +} + +void +kunmap(void *addr) +{ + vaddr_t va = (vaddr_t)addr; + +#if defined (__HAVE_PMAP_DIRECT) + pmap_unmap_direct(va); +#else + pmap_kremove(va, PAGE_SIZE); + pmap_update(pmap_kernel()); + uvm_km_free_wakeup(phys_map, va, PAGE_SIZE); +#endif +} + +void * +vmap(struct vm_page **pages, unsigned int npages, unsigned long flags, + pgprot_t prot) +{ + vaddr_t va; + paddr_t pa; + int i; + + va = uvm_km_valloc_wait(phys_map, PAGE_SIZE * npages); + if (va == 0) + return NULL; + for (i = 0; i < npages; i++) { + pa = VM_PAGE_TO_PHYS(pages[i]) | prot; + pmap_enter(pmap_kernel(), va + (i * PAGE_SIZE), pa, + PROT_READ | PROT_WRITE, + PROT_READ | PROT_WRITE | PMAP_WIRED); + pmap_update(pmap_kernel()); + } + + return (void *)va; +} + +void +vunmap(void *addr, size_t size) +{ + vaddr_t va = (vaddr_t)addr; + + pmap_remove(pmap_kernel(), va, va + size); + pmap_update(pmap_kernel()); + uvm_km_free(phys_map, va, size); +} + |