Date: Mon, 7 May 2007 06:32:41 GMT From: Kip Macy <kmacy@FreeBSD.org> To: Perforce Change Reviews <perforce@freebsd.org> Subject: PERFORCE change 119399 for review Message-ID: <200705070632.l476Wfuw029097@repoman.freebsd.org>
next in thread | raw e-mail | index | archive | help
http://perforce.freebsd.org/chv.cgi?CH=119399 Change 119399 by kmacy@kmacy_vt-x:opentoe_init on 2007/05/07 06:31:40 add routine to fault in and pin user pages with EXT_MBUF or kva mapping overhead Affected files ... .. //depot/projects/opentoe/sys/dev/cxgb/sys/mvec.h#2 edit .. //depot/projects/opentoe/sys/dev/cxgb/sys/uipc_mvec.c#3 edit Differences ... ==== //depot/projects/opentoe/sys/dev/cxgb/sys/mvec.h#2 (text+ko) ==== @@ -193,4 +193,6 @@ #define bus_dmamap_load_mvec_sg bus_dmamap_load_mbuf_sg #endif +int vm_user_page_get(vm_offset_t addr, int npages, vm_page_t *m, vm_paddr_t *paddr, int cow); + #endif ==== //depot/projects/opentoe/sys/dev/cxgb/sys/uipc_mvec.c#3 (text+ko) ==== @@ -35,9 +35,11 @@ #include <sys/systm.h> #include <sys/kernel.h> #include <sys/lock.h> +#include <sys/mutex.h> #include <sys/malloc.h> #include <sys/mbuf.h> #include <sys/ktr.h> +#include <sys/proc.h> #include <sys/sf_buf.h> #include <machine/bus.h> @@ -45,8 +47,12 @@ #include "opt_zero.h" #include <vm/vm.h> +#include <vm/vm_extern.h> +#include <vm/vm_param.h> +#include <vm/pmap.h> +#include <vm/vm_map.h> #include <vm/vm_page.h> -#include <vm/pmap.h> +#include <vm/vm_object.h> #ifdef DEBUG #define DPRINTF printf @@ -485,3 +491,44 @@ return (error); } #endif /* !__sparc64__ && !__sun4v__ */ + +int +vm_user_page_get(vm_offset_t addr, int npages, vm_page_t *m, vm_paddr_t *paddr, int cow) +{ + caddr_t uva; + vm_prot_t prot; + int i, j; + struct pmap *pmap; + + pmap = &curproc->p_vmspace->vm_pmap; + uva = (caddr_t)(addr & PG_FRAME); + prot = VM_PROT_READ|VM_PROT_WRITE; + for (i = 0; i < npages; i++) { + if(vm_fault_quick(uva, prot) < 0) { + vm_page_lock_queues(); + for (j = 0; j < i; i++) + vm_page_unhold(m[j]); + vm_page_unlock_queues(); + return (EFAULT); + } + m[i] = pmap_extract_and_hold(pmap, (vm_paddr_t)uva + i*PAGE_SIZE, prot); + } + + vm_page_lock_queues(); + for (i = 0; i < npages; i++) { + if (m[i] == NULL) { + paddr[i] = pmap_extract(pmap, (vm_paddr_t)uva + i*PAGE_SIZE); + continue; + } + paddr[i] = VM_PAGE_TO_PHYS(m[i]); + if (cow) + vm_page_cowsetup(m[i]); + + vm_page_dirty(m[i]); + vm_page_wire(m[i]); + vm_page_unhold(m[i]); + } + vm_page_unlock_queues(); + + return(0); +}
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200705070632.l476Wfuw029097>