diff options
Diffstat (limited to 'sys/dev/cxgb/ulp/tom/cxgb_vm.c')
| -rw-r--r-- | sys/dev/cxgb/ulp/tom/cxgb_vm.c | 143 |
1 files changed, 0 insertions, 143 deletions
diff --git a/sys/dev/cxgb/ulp/tom/cxgb_vm.c b/sys/dev/cxgb/ulp/tom/cxgb_vm.c deleted file mode 100644 index e84d206..0000000 --- a/sys/dev/cxgb/ulp/tom/cxgb_vm.c +++ /dev/null @@ -1,143 +0,0 @@ -/************************************************************************** - -Copyright (c) 2007-2008, Chelsio Inc. -All rights reserved. - -Redistribution and use in source and binary forms, with or without -modification, are permitted provided that the following conditions are met: - - 1. Redistributions of source code must retain the above copyright notice, - this list of conditions and the following disclaimer. - - 2. Neither the name of the Chelsio Corporation nor the names of its - contributors may be used to endorse or promote products derived from - this software without specific prior written permission. - -THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" -AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE -IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE -ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE -LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR -CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF -SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS -INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN -CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) -ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE -POSSIBILITY OF SUCH DAMAGE. - -***************************************************************************/ - -#include <sys/cdefs.h> -__FBSDID("$FreeBSD$"); - -#include <sys/param.h> -#include <sys/systm.h> -#include <sys/types.h> -#include <sys/fcntl.h> -#include <sys/kernel.h> -#include <sys/limits.h> -#include <sys/lock.h> -#include <sys/mbuf.h> -#include <sys/condvar.h> -#include <sys/mutex.h> -#include <sys/proc.h> -#include <sys/syslog.h> - -#include <vm/vm.h> -#include <vm/vm_page.h> -#include <vm/vm_map.h> -#include <vm/vm_extern.h> -#include <vm/pmap.h> -#include <ulp/tom/cxgb_vm.h> - -/* - * This routine takes a user's map, array of pages, number of pages, and flags - * and then does the following: - * - validate that the user has access to those pages (flags indicates read - * or write) - if not fail - * - validate that count is enough to hold range number of pages - if not fail - * - fault in any non-resident pages - * - if the user is doing a read force a write fault for any COWed pages - * - if the user is doing a read mark all pages as dirty - * - hold all pages - */ -int -vm_fault_hold_user_pages(vm_map_t map, vm_offset_t addr, vm_page_t *mp, - int count, vm_prot_t prot) -{ - vm_offset_t end, va; - int faults, rv; - pmap_t pmap; - vm_page_t m, *pages; - - pmap = vm_map_pmap(map); - pages = mp; - addr &= ~PAGE_MASK; - /* - * Check that virtual address range is legal - * This check is somewhat bogus as on some architectures kernel - * and user do not share VA - however, it appears that all FreeBSD - * architectures define it - */ - end = addr + (count * PAGE_SIZE); - if (end > VM_MAXUSER_ADDRESS) { - log(LOG_WARNING, "bad address passed to vm_fault_hold_user_pages"); - return (EFAULT); - } - - /* - * First optimistically assume that all pages are resident - * (and R/W if for write) if so just mark pages as held (and - * dirty if for write) and return - */ - for (pages = mp, faults = 0, va = addr; va < end; - va += PAGE_SIZE, pages++) { - /* - * it would be really nice if we had an unlocked - * version of this so we were only acquiring the - * pmap lock 1 time as opposed to potentially - * many dozens of times - */ - *pages = m = pmap_extract_and_hold(pmap, va, prot); - if (m == NULL) { - faults++; - continue; - } - /* - * Preemptively mark dirty - the pages - * will never have the modified bit set if - * they are only changed via DMA - */ - if (prot & VM_PROT_WRITE) { - vm_page_lock_queues(); - vm_page_dirty(m); - vm_page_unlock_queues(); - } - - } - - if (faults == 0) - return (0); - - /* - * Pages either have insufficient permissions or are not present - * trigger a fault where neccessary - */ - for (pages = mp, va = addr; va < end; va += PAGE_SIZE, pages++) { - if (*pages == NULL && (rv = vm_fault_hold(map, va, prot, - VM_FAULT_NORMAL, pages)) != KERN_SUCCESS) - goto error; - } - return (0); -error: - log(LOG_WARNING, - "vm_fault bad return rv=%d va=0x%zx\n", rv, va); - for (pages = mp, va = addr; va < end; va += PAGE_SIZE, pages++) - if (*pages) { - vm_page_lock(*pages); - vm_page_unhold(*pages); - vm_page_unlock(*pages); - *pages = NULL; - } - return (EFAULT); -} |
