Commit e33f6635 authored by Linus Torvalds's avatar Linus Torvalds

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6:
  [SPARC64]: Temporarily remove IOMMU merging code.
  [SPARC64]: Update defconfig.
  [SPARC]: Add new timerfd syscall entries.
parents 55850f47 38192d52
......@@ -79,7 +79,8 @@ sys_call_table:
/*295*/ .long sys_fchmodat, sys_faccessat, sys_pselect6, sys_ppoll, sys_unshare
/*300*/ .long sys_set_robust_list, sys_get_robust_list, sys_migrate_pages, sys_mbind, sys_get_mempolicy
/*305*/ .long sys_set_mempolicy, sys_kexec_load, sys_move_pages, sys_getcpu, sys_epoll_pwait
/*310*/ .long sys_utimensat, sys_signalfd, sys_ni_syscall, sys_eventfd, sys_fallocate
/*310*/ .long sys_utimensat, sys_signalfd, sys_timerfd_create, sys_eventfd, sys_fallocate
/*315*/ .long sys_timerfd_settime, sys_timerfd_gettime
#ifdef CONFIG_SUNOS_EMUL
/* Now the SunOS syscall table. */
......@@ -197,6 +198,7 @@ sunos_sys_table:
.long sunos_nosys, sunos_nosys, sunos_nosys
.long sunos_nosys
/*310*/ .long sunos_nosys, sunos_nosys, sunos_nosys
.long sunos_nosys, sunos_nosys
.long sunos_nosys, sunos_nosys, sunos_nosys
.long sunos_nosys
#endif
#
# Automatically generated make config: don't edit
# Linux kernel version: 2.6.24-rc4
# Tue Dec 4 00:37:59 2007
# Linux kernel version: 2.6.24
# Tue Feb 5 17:28:19 2008
#
CONFIG_SPARC=y
CONFIG_SPARC64=y
......@@ -17,6 +17,7 @@ CONFIG_ARCH_MAY_HAVE_PC_FDC=y
# CONFIG_ARCH_HAS_ILOG2_U32 is not set
# CONFIG_ARCH_HAS_ILOG2_U64 is not set
CONFIG_AUDIT_ARCH=y
CONFIG_HAVE_SETUP_PER_CPU_AREA=y
CONFIG_ARCH_NO_VIRT_TO_BUS=y
CONFIG_OF=y
CONFIG_GENERIC_HARDIRQS_NO__DO_IRQ=y
......@@ -30,13 +31,15 @@ CONFIG_HZ_100=y
# CONFIG_HZ_300 is not set
# CONFIG_HZ_1000 is not set
CONFIG_HZ=100
# CONFIG_SCHED_HRTICK is not set
CONFIG_HOTPLUG_CPU=y
CONFIG_DEFCONFIG_LIST="/lib/modules/$UNAME_RELEASE/.config"
#
# General setup
#
CONFIG_EXPERIMENTAL=y
CONFIG_BROKEN_ON_SMP=y
CONFIG_LOCK_KERNEL=y
CONFIG_INIT_ENV_ARG_LIMIT=32
CONFIG_LOCALVERSION=""
# CONFIG_LOCALVERSION_AUTO is not set
......@@ -76,6 +79,7 @@ CONFIG_FUTEX=y
CONFIG_ANON_INODES=y
CONFIG_EPOLL=y
CONFIG_SIGNALFD=y
CONFIG_TIMERFD=y
CONFIG_EVENTFD=y
CONFIG_SHMEM=y
CONFIG_VM_EVENT_COUNTERS=y
......@@ -83,6 +87,14 @@ CONFIG_SLUB_DEBUG=y
# CONFIG_SLAB is not set
CONFIG_SLUB=y
# CONFIG_SLOB is not set
CONFIG_PROFILING=y
# CONFIG_MARKERS is not set
CONFIG_OPROFILE=m
CONFIG_HAVE_OPROFILE=y
CONFIG_KPROBES=y
CONFIG_HAVE_KPROBES=y
CONFIG_PROC_PAGE_MONITOR=y
CONFIG_SLABINFO=y
CONFIG_RT_MUTEXES=y
# CONFIG_TINY_SHMEM is not set
CONFIG_BASE_SMALL=0
......@@ -92,6 +104,7 @@ CONFIG_MODULE_FORCE_UNLOAD=y
CONFIG_MODVERSIONS=y
CONFIG_MODULE_SRCVERSION_ALL=y
CONFIG_KMOD=y
CONFIG_STOP_MACHINE=y
CONFIG_BLOCK=y
CONFIG_BLK_DEV_IO_TRACE=y
CONFIG_BLK_DEV_BSG=y
......@@ -109,6 +122,8 @@ CONFIG_DEFAULT_AS=y
# CONFIG_DEFAULT_CFQ is not set
# CONFIG_DEFAULT_NOOP is not set
CONFIG_DEFAULT_IOSCHED="anticipatory"
CONFIG_CLASSIC_RCU=y
# CONFIG_PREEMPT_RCU is not set
CONFIG_SYSVIPC_COMPAT=y
CONFIG_GENERIC_HARDIRQS=y
......@@ -119,7 +134,8 @@ CONFIG_TICK_ONESHOT=y
CONFIG_NO_HZ=y
CONFIG_HIGH_RES_TIMERS=y
CONFIG_GENERIC_CLOCKEVENTS_BUILD=y
# CONFIG_SMP is not set
CONFIG_SMP=y
CONFIG_NR_CPUS=64
# CONFIG_CPU_FREQ is not set
CONFIG_RWSEM_XCHGADD_ALGORITHM=y
CONFIG_GENERIC_FIND_NEXT_BIT=y
......@@ -169,9 +185,12 @@ CONFIG_BINFMT_ELF32=y
CONFIG_BINFMT_ELF=y
CONFIG_BINFMT_MISC=m
CONFIG_SOLARIS_EMUL=y
CONFIG_SCHED_SMT=y
CONFIG_SCHED_MC=y
# CONFIG_PREEMPT_NONE is not set
CONFIG_PREEMPT_VOLUNTARY=y
# CONFIG_PREEMPT is not set
# CONFIG_RCU_TRACE is not set
# CONFIG_CMDLINE_BOOL is not set
#
......@@ -189,6 +208,7 @@ CONFIG_XFRM=y
CONFIG_XFRM_USER=m
# CONFIG_XFRM_SUB_POLICY is not set
CONFIG_XFRM_MIGRATE=y
# CONFIG_XFRM_STATISTICS is not set
CONFIG_NET_KEY=m
CONFIG_NET_KEY_MIGRATE=y
CONFIG_INET=y
......@@ -249,9 +269,9 @@ CONFIG_IP_DCCP_ACKVEC=y
CONFIG_IP_DCCP_CCID2=m
# CONFIG_IP_DCCP_CCID2_DEBUG is not set
CONFIG_IP_DCCP_CCID3=m
CONFIG_IP_DCCP_TFRC_LIB=m
# CONFIG_IP_DCCP_CCID3_DEBUG is not set
CONFIG_IP_DCCP_CCID3_RTO=100
CONFIG_IP_DCCP_TFRC_LIB=m
#
# DCCP Kernel Hacking
......@@ -279,6 +299,7 @@ CONFIG_VLAN_8021Q=m
CONFIG_NET_PKTGEN=m
CONFIG_NET_TCPPROBE=m
# CONFIG_HAMRADIO is not set
# CONFIG_CAN is not set
# CONFIG_IRDA is not set
# CONFIG_BT is not set
# CONFIG_AF_RXRPC is not set
......@@ -343,6 +364,7 @@ CONFIG_BLK_DEV_IDE=y
CONFIG_BLK_DEV_IDEDISK=y
# CONFIG_IDEDISK_MULTI_MODE is not set
CONFIG_BLK_DEV_IDECD=y
CONFIG_BLK_DEV_IDECD_VERBOSE_ERRORS=y
# CONFIG_BLK_DEV_IDETAPE is not set
# CONFIG_BLK_DEV_IDEFLOPPY is not set
# CONFIG_BLK_DEV_IDESCSI is not set
......@@ -359,7 +381,6 @@ CONFIG_IDE_GENERIC=y
# PCI IDE chipsets support
#
CONFIG_BLK_DEV_IDEPCI=y
# CONFIG_IDEPCI_SHARE_IRQ is not set
CONFIG_IDEPCI_PCIBUS_ORDER=y
# CONFIG_BLK_DEV_GENERIC is not set
# CONFIG_BLK_DEV_OPTI621 is not set
......@@ -389,7 +410,6 @@ CONFIG_BLK_DEV_ALI15X3=y
# CONFIG_BLK_DEV_TRM290 is not set
# CONFIG_BLK_DEV_VIA82CXXX is not set
# CONFIG_BLK_DEV_TC86C001 is not set
# CONFIG_IDE_ARM is not set
CONFIG_BLK_DEV_IDEDMA=y
CONFIG_IDE_ARCH_OBSOLETE_INIT=y
# CONFIG_BLK_DEV_HD is not set
......@@ -501,7 +521,6 @@ CONFIG_NETDEVICES=y
# CONFIG_EQUALIZER is not set
# CONFIG_TUN is not set
# CONFIG_VETH is not set
# CONFIG_IP1000 is not set
# CONFIG_ARCNET is not set
# CONFIG_PHYLIB is not set
CONFIG_NET_ETHERNET=y
......@@ -533,6 +552,7 @@ CONFIG_NET_PCI=y
# CONFIG_NE2K_PCI is not set
# CONFIG_8139CP is not set
# CONFIG_8139TOO is not set
# CONFIG_R6040 is not set
# CONFIG_SIS900 is not set
# CONFIG_EPIC100 is not set
# CONFIG_SUNDANCE is not set
......@@ -545,6 +565,9 @@ CONFIG_E1000=m
CONFIG_E1000_NAPI=y
# CONFIG_E1000_DISABLE_PACKET_SPLIT is not set
# CONFIG_E1000E is not set
# CONFIG_E1000E_ENABLED is not set
# CONFIG_IP1000 is not set
# CONFIG_IGB is not set
# CONFIG_MYRI_SBUS is not set
# CONFIG_NS83820 is not set
# CONFIG_HAMACHI is not set
......@@ -570,6 +593,7 @@ CONFIG_NETDEV_10000=y
CONFIG_NIU=m
# CONFIG_MLX4_CORE is not set
# CONFIG_TEHUTI is not set
# CONFIG_BNX2X is not set
# CONFIG_TR is not set
#
......@@ -602,7 +626,6 @@ CONFIG_PPPOE=m
# CONFIG_SLIP is not set
CONFIG_SLHC=m
# CONFIG_NET_FC is not set
# CONFIG_SHAPER is not set
# CONFIG_NETCONSOLE is not set
# CONFIG_NETPOLL is not set
# CONFIG_NET_POLL_CONTROLLER is not set
......@@ -679,6 +702,7 @@ CONFIG_VT_CONSOLE=y
CONFIG_HW_CONSOLE=y
# CONFIG_VT_HW_CONSOLE_BINDING is not set
# CONFIG_SERIAL_NONSTANDARD is not set
# CONFIG_NOZOMI is not set
#
# Serial drivers
......@@ -747,13 +771,13 @@ CONFIG_I2C_ALGOBIT=y
#
# Miscellaneous I2C Chip support
#
# CONFIG_SENSORS_DS1337 is not set
# CONFIG_SENSORS_DS1374 is not set
# CONFIG_DS1682 is not set
# CONFIG_SENSORS_EEPROM is not set
# CONFIG_SENSORS_PCF8574 is not set
# CONFIG_PCF8575 is not set
# CONFIG_SENSORS_PCA9539 is not set
# CONFIG_SENSORS_PCF8591 is not set
# CONFIG_TPS65010 is not set
# CONFIG_SENSORS_MAX6875 is not set
# CONFIG_SENSORS_TSL2550 is not set
# CONFIG_I2C_DEBUG_CORE is not set
......@@ -990,6 +1014,7 @@ CONFIG_SND_ALI5451=m
# CONFIG_SND_BT87X is not set
# CONFIG_SND_CA0106 is not set
# CONFIG_SND_CMIPCI is not set
# CONFIG_SND_OXYGEN is not set
# CONFIG_SND_CS4281 is not set
# CONFIG_SND_CS46XX is not set
# CONFIG_SND_DARLA20 is not set
......@@ -1014,6 +1039,7 @@ CONFIG_SND_ALI5451=m
# CONFIG_SND_HDA_INTEL is not set
# CONFIG_SND_HDSP is not set
# CONFIG_SND_HDSPM is not set
# CONFIG_SND_HIFIER is not set
# CONFIG_SND_ICE1712 is not set
# CONFIG_SND_ICE1724 is not set
# CONFIG_SND_INTEL8X0 is not set
......@@ -1031,6 +1057,7 @@ CONFIG_SND_ALI5451=m
# CONFIG_SND_TRIDENT is not set
# CONFIG_SND_VIA82XX is not set
# CONFIG_SND_VIA82XX_MODEM is not set
# CONFIG_SND_VIRTUOSO is not set
# CONFIG_SND_VX222 is not set
# CONFIG_SND_YMFPCI is not set
# CONFIG_SND_AC97_POWER_SAVE is not set
......@@ -1057,6 +1084,10 @@ CONFIG_SND_SUN_CS4231=m
# SoC Audio support for SuperH
#
#
# ALSA SoC audio for Freescale SOCs
#
#
# Open Sound System
#
......@@ -1080,6 +1111,7 @@ CONFIG_USB_ARCH_HAS_OHCI=y
CONFIG_USB_ARCH_HAS_EHCI=y
CONFIG_USB=y
# CONFIG_USB_DEBUG is not set
# CONFIG_USB_ANNOUNCE_NEW_DEVICES is not set
#
# Miscellaneous USB options
......@@ -1093,7 +1125,6 @@ CONFIG_USB_DEVICEFS=y
# USB Host Controller Drivers
#
CONFIG_USB_EHCI_HCD=m
# CONFIG_USB_EHCI_SPLIT_ISO is not set
# CONFIG_USB_EHCI_ROOT_HUB_TT is not set
# CONFIG_USB_EHCI_TT_NEWSCHED is not set
# CONFIG_USB_ISP116X_HCD is not set
......@@ -1143,10 +1174,6 @@ CONFIG_USB_STORAGE=m
#
# USB port drivers
#
#
# USB Serial Converter support
#
# CONFIG_USB_SERIAL is not set
#
......@@ -1172,14 +1199,6 @@ CONFIG_USB_STORAGE=m
# CONFIG_USB_TRANCEVIBRATOR is not set
# CONFIG_USB_IOWARRIOR is not set
# CONFIG_USB_TEST is not set
#
# USB DSL modem support
#
#
# USB Gadget Support
#
# CONFIG_USB_GADGET is not set
# CONFIG_MMC is not set
# CONFIG_NEW_LEDS is not set
......@@ -1332,11 +1351,6 @@ CONFIG_NLS_DEFAULT="iso8859-1"
# CONFIG_NLS_KOI8_U is not set
# CONFIG_NLS_UTF8 is not set
# CONFIG_DLM is not set
CONFIG_INSTRUMENTATION=y
CONFIG_PROFILING=y
CONFIG_OPROFILE=m
CONFIG_KPROBES=y
# CONFIG_MARKERS is not set
#
# Kernel hacking
......@@ -1374,6 +1388,8 @@ CONFIG_DEBUG_BUGVERBOSE=y
CONFIG_FORCED_INLINING=y
# CONFIG_BOOT_PRINTK_DELAY is not set
# CONFIG_RCU_TORTURE_TEST is not set
# CONFIG_KPROBES_SANITY_TEST is not set
# CONFIG_BACKTRACE_SELF_TEST is not set
# CONFIG_LKDTM is not set
# CONFIG_FAULT_INJECTION is not set
# CONFIG_SAMPLES is not set
......@@ -1396,8 +1412,9 @@ CONFIG_ASYNC_MEMCPY=m
CONFIG_ASYNC_XOR=m
CONFIG_CRYPTO=y
CONFIG_CRYPTO_ALGAPI=y
CONFIG_CRYPTO_AEAD=m
CONFIG_CRYPTO_AEAD=y
CONFIG_CRYPTO_BLKCIPHER=y
# CONFIG_CRYPTO_SEQIV is not set
CONFIG_CRYPTO_HASH=y
CONFIG_CRYPTO_MANAGER=y
CONFIG_CRYPTO_HMAC=y
......@@ -1416,6 +1433,9 @@ CONFIG_CRYPTO_CBC=y
CONFIG_CRYPTO_PCBC=m
CONFIG_CRYPTO_LRW=m
CONFIG_CRYPTO_XTS=m
# CONFIG_CRYPTO_CTR is not set
# CONFIG_CRYPTO_GCM is not set
# CONFIG_CRYPTO_CCM is not set
# CONFIG_CRYPTO_CRYPTD is not set
CONFIG_CRYPTO_DES=y
CONFIG_CRYPTO_FCRYPT=m
......@@ -1431,13 +1451,16 @@ CONFIG_CRYPTO_ARC4=m
CONFIG_CRYPTO_KHAZAD=m
CONFIG_CRYPTO_ANUBIS=m
CONFIG_CRYPTO_SEED=m
# CONFIG_CRYPTO_SALSA20 is not set
CONFIG_CRYPTO_DEFLATE=y
CONFIG_CRYPTO_MICHAEL_MIC=m
CONFIG_CRYPTO_CRC32C=m
CONFIG_CRYPTO_CAMELLIA=m
CONFIG_CRYPTO_TEST=m
CONFIG_CRYPTO_AUTHENC=m
# CONFIG_CRYPTO_LZO is not set
CONFIG_CRYPTO_HW=y
# CONFIG_CRYPTO_DEV_HIFN_795X is not set
#
# Library routines
......
......@@ -11,7 +11,7 @@ obj-y := process.o setup.o cpu.o idprom.o \
traps.o auxio.o una_asm.o sysfs.o iommu.o \
irq.o ptrace.o time.o sys_sparc.o signal.o \
unaligned.o central.o pci.o starfire.o semaphore.o \
power.o sbus.o iommu_common.o sparc64_ksyms.o chmc.o \
power.o sbus.o sparc64_ksyms.o chmc.o \
visemul.o prom.o of_device.o hvapi.o sstate.o mdesc.o
obj-$(CONFIG_STACKTRACE) += stacktrace.o
......
......@@ -472,94 +472,15 @@ static void dma_4u_unmap_single(struct device *dev, dma_addr_t bus_addr,
spin_unlock_irqrestore(&iommu->lock, flags);
}
#define SG_ENT_PHYS_ADDRESS(SG) (__pa(sg_virt((SG))))
static void fill_sg(iopte_t *iopte, struct scatterlist *sg,
int nused, int nelems,
unsigned long iopte_protection)
{
struct scatterlist *dma_sg = sg;
int i;
for (i = 0; i < nused; i++) {
unsigned long pteval = ~0UL;
u32 dma_npages;
dma_npages = ((dma_sg->dma_address & (IO_PAGE_SIZE - 1UL)) +
dma_sg->dma_length +
((IO_PAGE_SIZE - 1UL))) >> IO_PAGE_SHIFT;
do {
unsigned long offset;
signed int len;
/* If we are here, we know we have at least one
* more page to map. So walk forward until we
* hit a page crossing, and begin creating new
* mappings from that spot.
*/
for (;;) {
unsigned long tmp;
tmp = SG_ENT_PHYS_ADDRESS(sg);
len = sg->length;
if (((tmp ^ pteval) >> IO_PAGE_SHIFT) != 0UL) {
pteval = tmp & IO_PAGE_MASK;
offset = tmp & (IO_PAGE_SIZE - 1UL);
break;
}
if (((tmp ^ (tmp + len - 1UL)) >> IO_PAGE_SHIFT) != 0UL) {
pteval = (tmp + IO_PAGE_SIZE) & IO_PAGE_MASK;
offset = 0UL;
len -= (IO_PAGE_SIZE - (tmp & (IO_PAGE_SIZE - 1UL)));
break;
}
sg = sg_next(sg);
nelems--;
}
pteval = iopte_protection | (pteval & IOPTE_PAGE);
while (len > 0) {
*iopte++ = __iopte(pteval);
pteval += IO_PAGE_SIZE;
len -= (IO_PAGE_SIZE - offset);
offset = 0;
dma_npages--;
}
pteval = (pteval & IOPTE_PAGE) + len;
sg = sg_next(sg);
nelems--;
/* Skip over any tail mappings we've fully mapped,
* adjusting pteval along the way. Stop when we
* detect a page crossing event.
*/
while (nelems &&
(pteval << (64 - IO_PAGE_SHIFT)) != 0UL &&
(pteval == SG_ENT_PHYS_ADDRESS(sg)) &&
((pteval ^
(SG_ENT_PHYS_ADDRESS(sg) + sg->length - 1UL)) >> IO_PAGE_SHIFT) == 0UL) {
pteval += sg->length;
sg = sg_next(sg);
nelems--;
}
if ((pteval << (64 - IO_PAGE_SHIFT)) == 0UL)
pteval = ~0UL;
} while (dma_npages != 0);
dma_sg = sg_next(dma_sg);
}
}
static int dma_4u_map_sg(struct device *dev, struct scatterlist *sglist,
int nelems, enum dma_data_direction direction)
{
struct iommu *iommu;
unsigned long flags, ctx, i, npages, iopte_protection;
struct scatterlist *sg;
struct strbuf *strbuf;
unsigned long flags, ctx, npages, iopte_protection;
struct iommu *iommu;
iopte_t *base;
u32 dma_base;
struct scatterlist *sgtmp;
int used;
/* Fast path single entry scatterlists. */
if (nelems == 1) {
......@@ -578,11 +499,7 @@ static int dma_4u_map_sg(struct device *dev, struct scatterlist *sglist,
if (unlikely(direction == DMA_NONE))
goto bad_no_ctx;
/* Step 1: Prepare scatter list. */
npages = prepare_sg(dev, sglist, nelems);
/* Step 2: Allocate a cluster and context, if necessary. */
npages = calc_npages(sglist, nelems);
spin_lock_irqsave(&iommu->lock, flags);
......@@ -599,18 +516,6 @@ static int dma_4u_map_sg(struct device *dev, struct scatterlist *sglist,
dma_base = iommu->page_table_map_base +
((base - iommu->page_table) << IO_PAGE_SHIFT);
/* Step 3: Normalize DMA addresses. */
used = nelems;
sgtmp = sglist;
while (used && sgtmp->dma_length) {
sgtmp->dma_address += dma_base;
sgtmp = sg_next(sgtmp);
used--;
}
used = nelems - used;
/* Step 4: Create the mappings. */
if (strbuf->strbuf_enabled)
iopte_protection = IOPTE_STREAMING(ctx);
else
......@@ -618,13 +523,27 @@ static int dma_4u_map_sg(struct device *dev, struct scatterlist *sglist,
if (direction != DMA_TO_DEVICE)
iopte_protection |= IOPTE_WRITE;
fill_sg(base, sglist, used, nelems, iopte_protection);
for_each_sg(sglist, sg, nelems, i) {
unsigned long paddr = SG_ENT_PHYS_ADDRESS(sg);
unsigned long slen = sg->length;
unsigned long this_npages;
#ifdef VERIFY_SG
verify_sglist(sglist, nelems, base, npages);
#endif
this_npages = iommu_num_pages(paddr, slen);
return used;
sg->dma_address = dma_base | (paddr & ~IO_PAGE_MASK);
sg->dma_length = slen;
paddr &= IO_PAGE_MASK;
while (this_npages--) {
iopte_val(*base) = iopte_protection | paddr;
base++;
paddr += IO_PAGE_SIZE;
dma_base += IO_PAGE_SIZE;
}
}
return nelems;
bad:
iommu_free_ctx(iommu, ctx);
......@@ -637,11 +556,10 @@ bad_no_ctx:
static void dma_4u_unmap_sg(struct device *dev, struct scatterlist *sglist,
int nelems, enum dma_data_direction direction)
{
struct iommu *iommu;
unsigned long flags, ctx, i, npages;
struct strbuf *strbuf;
struct iommu *iommu;
iopte_t *base;
unsigned long flags, ctx, i, npages;
struct scatterlist *sg, *sgprv;
u32 bus_addr;
if (unlikely(direction == DMA_NONE)) {
......@@ -654,15 +572,7 @@ static void dma_4u_unmap_sg(struct device *dev, struct scatterlist *sglist,
bus_addr = sglist->dma_address & IO_PAGE_MASK;
sgprv = NULL;
for_each_sg(sglist, sg, nelems, i) {
if (sg->dma_length == 0)
break;
sgprv = sg;
}
npages = (IO_PAGE_ALIGN(sgprv->dma_address + sgprv->dma_length) -
bus_addr) >> IO_PAGE_SHIFT;
npages = calc_npages(sglist, nelems);
base = iommu->page_table +
((bus_addr - iommu->page_table_map_base) >> IO_PAGE_SHIFT);
......
/* $Id: iommu_common.c,v 1.9 2001/12/17 07:05:09 davem Exp $
* iommu_common.c: UltraSparc SBUS/PCI common iommu code.
*
* Copyright (C) 1999 David S. Miller (davem@redhat.com)
*/
#include <linux/dma-mapping.h>
#include "iommu_common.h"
/* You are _strongly_ advised to enable the following debugging code
* any time you make changes to the sg code below, run it for a while
* with filesystems mounted read-only before buying the farm... -DaveM
*/
#ifdef VERIFY_SG
static int verify_lengths(struct scatterlist *sglist, int nents, int npages)
{
int sg_len, dma_len;
int i, pgcount;
struct scatterlist *sg;
sg_len = 0;
for_each_sg(sglist, sg, nents, i)
sg_len += sg->length;
dma_len = 0;
for_each_sg(sglist, sg, nents, i) {
if (!sg->dma_length)
break;
dma_len += sg->dma_length;
}
if (sg_len != dma_len) {
printk("verify_lengths: Error, different, sg[%d] dma[%d]\n",
sg_len, dma_len);
return -1;
}
pgcount = 0;
for_each_sg(sglist, sg, nents, i) {
unsigned long start, end;
if (!sg->dma_length)
break;
start = sg->dma_address;
start = start & IO_PAGE_MASK;
end = sg->dma_address + sg->dma_length;
end = (end + (IO_PAGE_SIZE - 1)) & IO_PAGE_MASK;
pgcount += ((end - start) >> IO_PAGE_SHIFT);
}
if (pgcount != npages) {
printk("verify_lengths: Error, page count wrong, "
"npages[%d] pgcount[%d]\n",
npages, pgcount);
return -1;
}
/* This test passes... */
return 0;
}
static int verify_one_map(struct scatterlist *dma_sg, struct scatterlist **__sg, int nents, iopte_t **__iopte)
{
struct scatterlist *sg = *__sg;
iopte_t *iopte = *__iopte;
u32 dlen = dma_sg->dma_length;
u32 daddr;
unsigned int sglen;
unsigned long sgaddr;
daddr = dma_sg->dma_address;
sglen = sg->length;
sgaddr = (unsigned long) sg_virt(sg);
while (dlen > 0) {
unsigned long paddr;
/* SG and DMA_SG must begin at the same sub-page boundary. */
if ((sgaddr & ~IO_PAGE_MASK) != (daddr & ~IO_PAGE_MASK)) {
printk("verify_one_map: Wrong start offset "
"sg[%08lx] dma[%08x]\n",
sgaddr, daddr);
nents = -1;
goto out;
}
/* Verify the IOPTE points to the right page. */
paddr = iopte_val(*iopte) & IOPTE_PAGE;
if ((paddr + PAGE_OFFSET) != (sgaddr & IO_PAGE_MASK)) {
printk