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-rw-r--r--arch/alpha/Kconfig3
-rw-r--r--arch/alpha/kernel/Makefile2
-rw-r--r--arch/alpha/kernel/alpha_ksyms.c9
-rw-r--r--arch/alpha/kernel/pci.c23
-rw-r--r--arch/alpha/kernel/pci_iommu.c72
-rw-r--r--arch/alpha/kernel/semaphore.c224
6 files changed, 52 insertions, 281 deletions
diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig
index 002703b8c0b..729cdbdf803 100644
--- a/arch/alpha/Kconfig
+++ b/arch/alpha/Kconfig
@@ -330,6 +330,9 @@ config PCI_DOMAINS
config PCI_SYSCALL
def_bool PCI
+config IOMMU_HELPER
+ def_bool PCI
+
config ALPHA_CORE_AGP
bool
depends on ALPHA_GENERIC || ALPHA_TITAN || ALPHA_MARVEL
diff --git a/arch/alpha/kernel/Makefile b/arch/alpha/kernel/Makefile
index dccf05245d4..ac706c1d7ad 100644
--- a/arch/alpha/kernel/Makefile
+++ b/arch/alpha/kernel/Makefile
@@ -7,7 +7,7 @@ EXTRA_AFLAGS := $(KBUILD_CFLAGS)
EXTRA_CFLAGS := -Werror -Wno-sign-compare
obj-y := entry.o traps.o process.o init_task.o osf_sys.o irq.o \
- irq_alpha.o signal.o setup.o ptrace.o time.o semaphore.o \
+ irq_alpha.o signal.o setup.o ptrace.o time.o \
alpha_ksyms.o systbls.o err_common.o io.o
obj-$(CONFIG_VGA_HOSE) += console.o
diff --git a/arch/alpha/kernel/alpha_ksyms.c b/arch/alpha/kernel/alpha_ksyms.c
index e9762a33b04..d96e742d4dc 100644
--- a/arch/alpha/kernel/alpha_ksyms.c
+++ b/arch/alpha/kernel/alpha_ksyms.c
@@ -77,15 +77,6 @@ EXPORT_SYMBOL(__do_clear_user);
EXPORT_SYMBOL(__strncpy_from_user);
EXPORT_SYMBOL(__strnlen_user);
-/* Semaphore helper functions. */
-EXPORT_SYMBOL(__down_failed);
-EXPORT_SYMBOL(__down_failed_interruptible);
-EXPORT_SYMBOL(__up_wakeup);
-EXPORT_SYMBOL(down);
-EXPORT_SYMBOL(down_interruptible);
-EXPORT_SYMBOL(down_trylock);
-EXPORT_SYMBOL(up);
-
/*
* SMP-specific symbols.
*/
diff --git a/arch/alpha/kernel/pci.c b/arch/alpha/kernel/pci.c
index 9dc1cee4326..c107cc08daf 100644
--- a/arch/alpha/kernel/pci.c
+++ b/arch/alpha/kernel/pci.c
@@ -372,28 +372,7 @@ EXPORT_SYMBOL(pcibios_bus_to_resource);
int
pcibios_enable_device(struct pci_dev *dev, int mask)
{
- u16 cmd, oldcmd;
- int i;
-
- pci_read_config_word(dev, PCI_COMMAND, &cmd);
- oldcmd = cmd;
-
- for (i = 0; i < PCI_NUM_RESOURCES; i++) {
- struct resource *res = &dev->resource[i];
-
- if (res->flags & IORESOURCE_IO)
- cmd |= PCI_COMMAND_IO;
- else if (res->flags & IORESOURCE_MEM)
- cmd |= PCI_COMMAND_MEMORY;
- }
-
- if (cmd != oldcmd) {
- printk(KERN_DEBUG "PCI: Enabling device: (%s), cmd %x\n",
- pci_name(dev), cmd);
- /* Enable the appropriate bits in the PCI command register. */
- pci_write_config_word(dev, PCI_COMMAND, cmd);
- }
- return 0;
+ return pci_enable_resources(dev, mask);
}
/*
diff --git a/arch/alpha/kernel/pci_iommu.c b/arch/alpha/kernel/pci_iommu.c
index 26d3789dfdd..dd6e334ab9e 100644
--- a/arch/alpha/kernel/pci_iommu.c
+++ b/arch/alpha/kernel/pci_iommu.c
@@ -10,6 +10,7 @@
#include <linux/scatterlist.h>
#include <linux/log2.h>
#include <linux/dma-mapping.h>
+#include <linux/iommu-helper.h>
#include <asm/io.h>
#include <asm/hwrpb.h>
@@ -31,7 +32,6 @@
#endif
#define DEBUG_NODIRECT 0
-#define DEBUG_FORCEDAC 0
#define ISA_DMA_MASK 0x00ffffff
@@ -128,37 +128,55 @@ iommu_arena_new(struct pci_controller *hose, dma_addr_t base,
/* Must be called with the arena lock held */
static long
-iommu_arena_find_pages(struct pci_iommu_arena *arena, long n, long mask)
+iommu_arena_find_pages(struct device *dev, struct pci_iommu_arena *arena,
+ long n, long mask)
{
unsigned long *ptes;
long i, p, nent;
+ int pass = 0;
+ unsigned long base;
+ unsigned long boundary_size;
+
+ base = arena->dma_base >> PAGE_SHIFT;
+ if (dev) {
+ boundary_size = dma_get_seg_boundary(dev) + 1;
+ boundary_size >>= PAGE_SHIFT;
+ } else {
+ boundary_size = 1UL << (32 - PAGE_SHIFT);
+ }
/* Search forward for the first mask-aligned sequence of N free ptes */
ptes = arena->ptes;
nent = arena->size >> PAGE_SHIFT;
- p = (arena->next_entry + mask) & ~mask;
+ p = ALIGN(arena->next_entry, mask + 1);
i = 0;
+
+again:
while (i < n && p+i < nent) {
+ if (!i && iommu_is_span_boundary(p, n, base, boundary_size)) {
+ p = ALIGN(p + 1, mask + 1);
+ goto again;
+ }
+
if (ptes[p+i])
- p = (p + i + 1 + mask) & ~mask, i = 0;
+ p = ALIGN(p + i + 1, mask + 1), i = 0;
else
i = i + 1;
}
if (i < n) {
- /* Reached the end. Flush the TLB and restart the
- search from the beginning. */
- alpha_mv.mv_pci_tbi(arena->hose, 0, -1);
-
- p = 0, i = 0;
- while (i < n && p+i < nent) {
- if (ptes[p+i])
- p = (p + i + 1 + mask) & ~mask, i = 0;
- else
- i = i + 1;
- }
-
- if (i < n)
+ if (pass < 1) {
+ /*
+ * Reached the end. Flush the TLB and restart
+ * the search from the beginning.
+ */
+ alpha_mv.mv_pci_tbi(arena->hose, 0, -1);
+
+ pass++;
+ p = 0;
+ i = 0;
+ goto again;
+ } else
return -1;
}
@@ -168,7 +186,8 @@ iommu_arena_find_pages(struct pci_iommu_arena *arena, long n, long mask)
}
static long
-iommu_arena_alloc(struct pci_iommu_arena *arena, long n, unsigned int align)
+iommu_arena_alloc(struct device *dev, struct pci_iommu_arena *arena, long n,
+ unsigned int align)
{
unsigned long flags;
unsigned long *ptes;
@@ -179,7 +198,7 @@ iommu_arena_alloc(struct pci_iommu_arena *arena, long n, unsigned int align)
/* Search for N empty ptes */
ptes = arena->ptes;
mask = max(align, arena->align_entry) - 1;
- p = iommu_arena_find_pages(arena, n, mask);
+ p = iommu_arena_find_pages(dev, arena, n, mask);
if (p < 0) {
spin_unlock_irqrestore(&arena->lock, flags);
return -1;
@@ -229,6 +248,7 @@ pci_map_single_1(struct pci_dev *pdev, void *cpu_addr, size_t size,
unsigned long paddr;
dma_addr_t ret;
unsigned int align = 0;
+ struct device *dev = pdev ? &pdev->dev : NULL;
paddr = __pa(cpu_addr);
@@ -276,7 +296,7 @@ pci_map_single_1(struct pci_dev *pdev, void *cpu_addr, size_t size,
/* Force allocation to 64KB boundary for ISA bridges. */
if (pdev && pdev == isa_bridge)
align = 8;
- dma_ofs = iommu_arena_alloc(arena, npages, align);
+ dma_ofs = iommu_arena_alloc(dev, arena, npages, align);
if (dma_ofs < 0) {
printk(KERN_WARNING "pci_map_single failed: "
"could not allocate dma page tables\n");
@@ -404,11 +424,13 @@ EXPORT_SYMBOL(pci_unmap_page);
else DMA_ADDRP is undefined. */
void *
-pci_alloc_consistent(struct pci_dev *pdev, size_t size, dma_addr_t *dma_addrp)
+__pci_alloc_consistent(struct pci_dev *pdev, size_t size,
+ dma_addr_t *dma_addrp, gfp_t gfp)
{
void *cpu_addr;
long order = get_order(size);
- gfp_t gfp = GFP_ATOMIC;
+
+ gfp &= ~GFP_DMA;
try_again:
cpu_addr = (void *)__get_free_pages(gfp, order);
@@ -438,7 +460,7 @@ try_again:
return cpu_addr;
}
-EXPORT_SYMBOL(pci_alloc_consistent);
+EXPORT_SYMBOL(__pci_alloc_consistent);
/* Free and unmap a consistent DMA buffer. CPU_ADDR and DMA_ADDR must
be values that were returned from pci_alloc_consistent. SIZE must
@@ -563,7 +585,7 @@ sg_fill(struct device *dev, struct scatterlist *leader, struct scatterlist *end,
paddr &= ~PAGE_MASK;
npages = calc_npages(paddr + size);
- dma_ofs = iommu_arena_alloc(arena, npages, 0);
+ dma_ofs = iommu_arena_alloc(dev, arena, npages, 0);
if (dma_ofs < 0) {
/* If we attempted a direct map above but failed, die. */
if (leader->dma_address == 0)
@@ -830,7 +852,7 @@ iommu_reserve(struct pci_iommu_arena *arena, long pg_count, long align_mask)
/* Search for N empty ptes. */
ptes = arena->ptes;
- p = iommu_arena_find_pages(arena, pg_count, align_mask);
+ p = iommu_arena_find_pages(NULL, arena, pg_count, align_mask);
if (p < 0) {
spin_unlock_irqrestore(&arena->lock, flags);
return -1;
diff --git a/arch/alpha/kernel/semaphore.c b/arch/alpha/kernel/semaphore.c
deleted file mode 100644
index 8d2982aa1b8..00000000000
--- a/arch/alpha/kernel/semaphore.c
+++ /dev/null
@@ -1,224 +0,0 @@
-/*
- * Alpha semaphore implementation.
- *
- * (C) Copyright 1996 Linus Torvalds
- * (C) Copyright 1999, 2000 Richard Henderson
- */
-
-#include <linux/errno.h>
-#include <linux/sched.h>
-#include <linux/init.h>
-
-/*
- * This is basically the PPC semaphore scheme ported to use
- * the Alpha ll/sc sequences, so see the PPC code for
- * credits.
- */
-
-/*
- * Atomically update sem->count.
- * This does the equivalent of the following:
- *
- * old_count = sem->count;
- * tmp = MAX(old_count, 0) + incr;
- * sem->count = tmp;
- * return old_count;
- */
-static inline int __sem_update_count(struct semaphore *sem, int incr)
-{
- long old_count, tmp = 0;
-
- __asm__ __volatile__(
- "1: ldl_l %0,%2\n"
- " cmovgt %0,%0,%1\n"
- " addl %1,%3,%1\n"
- " stl_c %1,%2\n"
- " beq %1,2f\n"
- " mb\n"
- ".subsection 2\n"
- "2: br 1b\n"
- ".previous"
- : "=&r" (old_count), "=&r" (tmp), "=m" (sem->count)
- : "Ir" (incr), "1" (tmp), "m" (sem->count));
-
- return old_count;
-}
-
-/*
- * Perform the "down" function. Return zero for semaphore acquired,
- * return negative for signalled out of the function.
- *
- * If called from down, the return is ignored and the wait loop is
- * not interruptible. This means that a task waiting on a semaphore
- * using "down()" cannot be killed until someone does an "up()" on
- * the semaphore.
- *
- * If called from down_interruptible, the return value gets checked
- * upon return. If the return value is negative then the task continues
- * with the negative value in the return register (it can be tested by
- * the caller).
- *
- * Either form may be used in conjunction with "up()".
- */
-
-void __sched
-__down_failed(struct semaphore *sem)
-{
- struct task_struct *tsk = current;
- DECLARE_WAITQUEUE(wait, tsk);
-
-#ifdef CONFIG_DEBUG_SEMAPHORE
- printk("%s(%d): down failed(%p)\n",
- tsk->comm, task_pid_nr(tsk), sem);
-#endif
-
- tsk->state = TASK_UNINTERRUPTIBLE;
- wmb();
- add_wait_queue_exclusive(&sem->wait, &wait);
-
- /*
- * Try to get the semaphore. If the count is > 0, then we've
- * got the semaphore; we decrement count and exit the loop.
- * If the count is 0 or negative, we set it to -1, indicating
- * that we are asleep, and then sleep.
- */
- while (__sem_update_count(sem, -1) <= 0) {
- schedule();
- set_task_state(tsk, TASK_UNINTERRUPTIBLE);
- }
- remove_wait_queue(&sem->wait, &wait);
- tsk->state = TASK_RUNNING;
-
- /*
- * If there are any more sleepers, wake one of them up so
- * that it can either get the semaphore, or set count to -1
- * indicating that there are still processes sleeping.
- */
- wake_up(&sem->wait);
-
-#ifdef CONFIG_DEBUG_SEMAPHORE
- printk("%s(%d): down acquired(%p)\n",
- tsk->comm, task_pid_nr(tsk), sem);
-#endif
-}
-
-int __sched
-__down_failed_interruptible(struct semaphore *sem)
-{
- struct task_struct *tsk = current;
- DECLARE_WAITQUEUE(wait, tsk);
- long ret = 0;
-
-#ifdef CONFIG_DEBUG_SEMAPHORE
- printk("%s(%d): down failed(%p)\n",
- tsk->comm, task_pid_nr(tsk), sem);
-#endif
-
- tsk->state = TASK_INTERRUPTIBLE;
- wmb();
- add_wait_queue_exclusive(&sem->wait, &wait);
-
- while (__sem_update_count(sem, -1) <= 0) {
- if (signal_pending(current)) {
- /*
- * A signal is pending - give up trying.
- * Set sem->count to 0 if it is negative,
- * since we are no longer sleeping.
- */
- __sem_update_count(sem, 0);
- ret = -EINTR;
- break;
- }
- schedule();
- set_task_state(tsk, TASK_INTERRUPTIBLE);
- }
-
- remove_wait_queue(&sem->wait, &wait);
- tsk->state = TASK_RUNNING;
- wake_up(&sem->wait);
-
-#ifdef CONFIG_DEBUG_SEMAPHORE
- printk("%s(%d): down %s(%p)\n",
- current->comm, task_pid_nr(current),
- (ret < 0 ? "interrupted" : "acquired"), sem);
-#endif
- return ret;
-}
-
-void
-__up_wakeup(struct semaphore *sem)
-{
- /*
- * Note that we incremented count in up() before we came here,
- * but that was ineffective since the result was <= 0, and
- * any negative value of count is equivalent to 0.
- * This ends up setting count to 1, unless count is now > 0
- * (i.e. because some other cpu has called up() in the meantime),
- * in which case we just increment count.
- */
- __sem_update_count(sem, 1);
- wake_up(&sem->wait);
-}
-
-void __sched
-down(struct semaphore *sem)
-{
-#ifdef WAITQUEUE_DEBUG
- CHECK_MAGIC(sem->__magic);
-#endif
-#ifdef CONFIG_DEBUG_SEMAPHORE
- printk("%s(%d): down(%p) <count=%d> from %p\n",
- current->comm, task_pid_nr(current), sem,
- atomic_read(&sem->count), __builtin_return_address(0));
-#endif
- __down(sem);
-}
-
-int __sched
-down_interruptible(struct semaphore *sem)
-{
-#ifdef WAITQUEUE_DEBUG
- CHECK_MAGIC(sem->__magic);
-#endif
-#ifdef CONFIG_DEBUG_SEMAPHORE
- printk("%s(%d): down(%p) <count=%d> from %p\n",
- current->comm, task_pid_nr(current), sem,
- atomic_read(&sem->count), __builtin_return_address(0));
-#endif
- return __down_interruptible(sem);
-}
-
-int
-down_trylock(struct semaphore *sem)
-{
- int ret;
-
-#ifdef WAITQUEUE_DEBUG
- CHECK_MAGIC(sem->__magic);
-#endif
-
- ret = __down_trylock(sem);
-
-#ifdef CONFIG_DEBUG_SEMAPHORE
- printk("%s(%d): down_trylock %s from %p\n",
- current->comm, task_pid_nr(current),
- ret ? "failed" : "acquired",
- __builtin_return_address(0));
-#endif
-
- return ret;
-}
-
-void
-up(struct semaphore *sem)
-{
-#ifdef WAITQUEUE_DEBUG
- CHECK_MAGIC(sem->__magic);
-#endif
-#ifdef CONFIG_DEBUG_SEMAPHORE
- printk("%s(%d): up(%p) <count=%d> from %p\n",
- current->comm, task_pid_nr(current), sem,
- atomic_read(&sem->count), __builtin_return_address(0));
-#endif
- __up(sem);
-}
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