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-rw-r--r--arch/alpha/kernel/pci-noop.c101
-rw-r--r--arch/alpha/kernel/pci_iommu.c201
-rw-r--r--arch/alpha/kernel/ptrace.c59
3 files changed, 144 insertions, 217 deletions
diff --git a/arch/alpha/kernel/pci-noop.c b/arch/alpha/kernel/pci-noop.c
index c19a376520f4..823a540f9f5b 100644
--- a/arch/alpha/kernel/pci-noop.c
+++ b/arch/alpha/kernel/pci-noop.c
@@ -106,58 +106,8 @@ sys_pciconfig_write(unsigned long bus, unsigned long dfn,
return -ENODEV;
}
-/* Stubs for the routines in pci_iommu.c: */
-
-void *
-__pci_alloc_consistent(struct pci_dev *pdev, size_t size,
- dma_addr_t *dma_addrp, gfp_t gfp)
-{
- return NULL;
-}
-
-void
-pci_free_consistent(struct pci_dev *pdev, size_t size, void *cpu_addr,
- dma_addr_t dma_addr)
-{
-}
-
-dma_addr_t
-pci_map_single(struct pci_dev *pdev, void *cpu_addr, size_t size,
- int direction)
-{
- return (dma_addr_t) 0;
-}
-
-void
-pci_unmap_single(struct pci_dev *pdev, dma_addr_t dma_addr, size_t size,
- int direction)
-{
-}
-
-int
-pci_map_sg(struct pci_dev *pdev, struct scatterlist *sg, int nents,
- int direction)
-{
- return 0;
-}
-
-void
-pci_unmap_sg(struct pci_dev *pdev, struct scatterlist *sg, int nents,
- int direction)
-{
-}
-
-int
-pci_dma_supported(struct pci_dev *hwdev, dma_addr_t mask)
-{
- return 0;
-}
-
-/* Generic DMA mapping functions: */
-
-void *
-dma_alloc_coherent(struct device *dev, size_t size,
- dma_addr_t *dma_handle, gfp_t gfp)
+static void *alpha_noop_alloc_coherent(struct device *dev, size_t size,
+ dma_addr_t *dma_handle, gfp_t gfp)
{
void *ret;
@@ -171,11 +121,22 @@ dma_alloc_coherent(struct device *dev, size_t size,
return ret;
}
-EXPORT_SYMBOL(dma_alloc_coherent);
+static void alpha_noop_free_coherent(struct device *dev, size_t size,
+ void *cpu_addr, dma_addr_t dma_addr)
+{
+ free_pages((unsigned long)cpu_addr, get_order(size));
+}
+
+static dma_addr_t alpha_noop_map_page(struct device *dev, struct page *page,
+ unsigned long offset, size_t size,
+ enum dma_data_direction dir,
+ struct dma_attrs *attrs)
+{
+ return page_to_pa(page) + offset;
+}
-int
-dma_map_sg(struct device *dev, struct scatterlist *sgl, int nents,
- enum dma_data_direction direction)
+static int alpha_noop_map_sg(struct device *dev, struct scatterlist *sgl, int nents,
+ enum dma_data_direction dir, struct dma_attrs *attrs)
{
int i;
struct scatterlist *sg;
@@ -192,19 +153,37 @@ dma_map_sg(struct device *dev, struct scatterlist *sgl, int nents,
return nents;
}
-EXPORT_SYMBOL(dma_map_sg);
+static int alpha_noop_mapping_error(struct device *dev, dma_addr_t dma_addr)
+{
+ return 0;
+}
+
+static int alpha_noop_supported(struct device *dev, u64 mask)
+{
+ return mask < 0x00ffffffUL ? 0 : 1;
+}
-int
-dma_set_mask(struct device *dev, u64 mask)
+static int alpha_noop_set_mask(struct device *dev, u64 mask)
{
if (!dev->dma_mask || !dma_supported(dev, mask))
return -EIO;
*dev->dma_mask = mask;
-
return 0;
}
-EXPORT_SYMBOL(dma_set_mask);
+
+struct dma_map_ops alpha_noop_ops = {
+ .alloc_coherent = alpha_noop_alloc_coherent,
+ .free_coherent = alpha_noop_free_coherent,
+ .map_page = alpha_noop_map_page,
+ .map_sg = alpha_noop_map_sg,
+ .mapping_error = alpha_noop_mapping_error,
+ .dma_supported = alpha_noop_supported,
+ .set_dma_mask = alpha_noop_set_mask,
+};
+
+struct dma_map_ops *dma_ops = &alpha_noop_ops;
+EXPORT_SYMBOL(dma_ops);
void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen)
{
diff --git a/arch/alpha/kernel/pci_iommu.c b/arch/alpha/kernel/pci_iommu.c
index 8449504f5e0b..ce9e54c887fa 100644
--- a/arch/alpha/kernel/pci_iommu.c
+++ b/arch/alpha/kernel/pci_iommu.c
@@ -216,10 +216,30 @@ iommu_arena_free(struct pci_iommu_arena *arena, long ofs, long n)
for (i = 0; i < n; ++i)
p[i] = 0;
}
-
-/* True if the machine supports DAC addressing, and DEV can
- make use of it given MASK. */
-static int pci_dac_dma_supported(struct pci_dev *hwdev, u64 mask);
+
+/*
+ * True if the machine supports DAC addressing, and DEV can
+ * make use of it given MASK.
+ */
+static int pci_dac_dma_supported(struct pci_dev *dev, u64 mask)
+{
+ dma64_addr_t dac_offset = alpha_mv.pci_dac_offset;
+ int ok = 1;
+
+ /* If this is not set, the machine doesn't support DAC at all. */
+ if (dac_offset == 0)
+ ok = 0;
+
+ /* The device has to be able to address our DAC bit. */
+ if ((dac_offset & dev->dma_mask) != dac_offset)
+ ok = 0;
+
+ /* If both conditions above are met, we are fine. */
+ DBGA("pci_dac_dma_supported %s from %p\n",
+ ok ? "yes" : "no", __builtin_return_address(0));
+
+ return ok;
+}
/* Map a single buffer of the indicated size for PCI DMA in streaming
mode. The 32-bit PCI bus mastering address to use is returned.
@@ -301,23 +321,36 @@ pci_map_single_1(struct pci_dev *pdev, void *cpu_addr, size_t size,
return ret;
}
-dma_addr_t
-pci_map_single(struct pci_dev *pdev, void *cpu_addr, size_t size, int dir)
+/* Helper for generic DMA-mapping functions. */
+static struct pci_dev *alpha_gendev_to_pci(struct device *dev)
{
- int dac_allowed;
+ if (dev && dev->bus == &pci_bus_type)
+ return to_pci_dev(dev);
- if (dir == PCI_DMA_NONE)
- BUG();
+ /* Assume that non-PCI devices asking for DMA are either ISA or EISA,
+ BUG() otherwise. */
+ BUG_ON(!isa_bridge);
- dac_allowed = pdev ? pci_dac_dma_supported(pdev, pdev->dma_mask) : 0;
- return pci_map_single_1(pdev, cpu_addr, size, dac_allowed);
+ /* Assume non-busmaster ISA DMA when dma_mask is not set (the ISA
+ bridge is bus master then). */
+ if (!dev || !dev->dma_mask || !*dev->dma_mask)
+ return isa_bridge;
+
+ /* For EISA bus masters, return isa_bridge (it might have smaller
+ dma_mask due to wiring limitations). */
+ if (*dev->dma_mask >= isa_bridge->dma_mask)
+ return isa_bridge;
+
+ /* This assumes ISA bus master with dma_mask 0xffffff. */
+ return NULL;
}
-EXPORT_SYMBOL(pci_map_single);
-dma_addr_t
-pci_map_page(struct pci_dev *pdev, struct page *page, unsigned long offset,
- size_t size, int dir)
+static dma_addr_t alpha_pci_map_page(struct device *dev, struct page *page,
+ unsigned long offset, size_t size,
+ enum dma_data_direction dir,
+ struct dma_attrs *attrs)
{
+ struct pci_dev *pdev = alpha_gendev_to_pci(dev);
int dac_allowed;
if (dir == PCI_DMA_NONE)
@@ -327,7 +360,6 @@ pci_map_page(struct pci_dev *pdev, struct page *page, unsigned long offset,
return pci_map_single_1(pdev, (char *)page_address(page) + offset,
size, dac_allowed);
}
-EXPORT_SYMBOL(pci_map_page);
/* Unmap a single streaming mode DMA translation. The DMA_ADDR and
SIZE must match what was provided for in a previous pci_map_single
@@ -335,16 +367,17 @@ EXPORT_SYMBOL(pci_map_page);
the cpu to the buffer are guaranteed to see whatever the device
wrote there. */
-void
-pci_unmap_single(struct pci_dev *pdev, dma_addr_t dma_addr, size_t size,
- int direction)
+static void alpha_pci_unmap_page(struct device *dev, dma_addr_t dma_addr,
+ size_t size, enum dma_data_direction dir,
+ struct dma_attrs *attrs)
{
unsigned long flags;
+ struct pci_dev *pdev = alpha_gendev_to_pci(dev);
struct pci_controller *hose = pdev ? pdev->sysdata : pci_isa_hose;
struct pci_iommu_arena *arena;
long dma_ofs, npages;
- if (direction == PCI_DMA_NONE)
+ if (dir == PCI_DMA_NONE)
BUG();
if (dma_addr >= __direct_map_base
@@ -393,25 +426,16 @@ pci_unmap_single(struct pci_dev *pdev, dma_addr_t dma_addr, size_t size,
DBGA2("pci_unmap_single: sg [%llx,%zx] np %ld from %p\n",
dma_addr, size, npages, __builtin_return_address(0));
}
-EXPORT_SYMBOL(pci_unmap_single);
-
-void
-pci_unmap_page(struct pci_dev *pdev, dma_addr_t dma_addr,
- size_t size, int direction)
-{
- pci_unmap_single(pdev, dma_addr, size, direction);
-}
-EXPORT_SYMBOL(pci_unmap_page);
/* Allocate and map kernel buffer using consistent mode DMA for PCI
device. Returns non-NULL cpu-view pointer to the buffer if
successful and sets *DMA_ADDRP to the pci side dma address as well,
else DMA_ADDRP is undefined. */
-void *
-__pci_alloc_consistent(struct pci_dev *pdev, size_t size,
- dma_addr_t *dma_addrp, gfp_t gfp)
+static void *alpha_pci_alloc_coherent(struct device *dev, size_t size,
+ dma_addr_t *dma_addrp, gfp_t gfp)
{
+ struct pci_dev *pdev = alpha_gendev_to_pci(dev);
void *cpu_addr;
long order = get_order(size);
@@ -439,13 +463,12 @@ try_again:
gfp |= GFP_DMA;
goto try_again;
}
-
+
DBGA2("pci_alloc_consistent: %zx -> [%p,%llx] from %p\n",
size, cpu_addr, *dma_addrp, __builtin_return_address(0));
return cpu_addr;
}
-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
@@ -453,17 +476,16 @@ EXPORT_SYMBOL(__pci_alloc_consistent);
References to the memory and mappings associated with CPU_ADDR or
DMA_ADDR past this call are illegal. */
-void
-pci_free_consistent(struct pci_dev *pdev, size_t size, void *cpu_addr,
- dma_addr_t dma_addr)
+static void alpha_pci_free_coherent(struct device *dev, size_t size,
+ void *cpu_addr, dma_addr_t dma_addr)
{
+ struct pci_dev *pdev = alpha_gendev_to_pci(dev);
pci_unmap_single(pdev, dma_addr, size, PCI_DMA_BIDIRECTIONAL);
free_pages((unsigned long)cpu_addr, get_order(size));
DBGA2("pci_free_consistent: [%llx,%zx] from %p\n",
dma_addr, size, __builtin_return_address(0));
}
-EXPORT_SYMBOL(pci_free_consistent);
/* Classify the elements of the scatterlist. Write dma_address
of each element with:
@@ -626,23 +648,21 @@ sg_fill(struct device *dev, struct scatterlist *leader, struct scatterlist *end,
return 1;
}
-int
-pci_map_sg(struct pci_dev *pdev, struct scatterlist *sg, int nents,
- int direction)
+static int alpha_pci_map_sg(struct device *dev, struct scatterlist *sg,
+ int nents, enum dma_data_direction dir,
+ struct dma_attrs *attrs)
{
+ struct pci_dev *pdev = alpha_gendev_to_pci(dev);
struct scatterlist *start, *end, *out;
struct pci_controller *hose;
struct pci_iommu_arena *arena;
dma_addr_t max_dma;
int dac_allowed;
- struct device *dev;
- if (direction == PCI_DMA_NONE)
+ if (dir == PCI_DMA_NONE)
BUG();
- dac_allowed = pdev ? pci_dac_dma_supported(pdev, pdev->dma_mask) : 0;
-
- dev = pdev ? &pdev->dev : NULL;
+ dac_allowed = dev ? pci_dac_dma_supported(pdev, pdev->dma_mask) : 0;
/* Fast path single entry scatterlists. */
if (nents == 1) {
@@ -699,19 +719,19 @@ pci_map_sg(struct pci_dev *pdev, struct scatterlist *sg, int nents,
/* Some allocation failed while mapping the scatterlist
entries. Unmap them now. */
if (out > start)
- pci_unmap_sg(pdev, start, out - start, direction);
+ pci_unmap_sg(pdev, start, out - start, dir);
return 0;
}
-EXPORT_SYMBOL(pci_map_sg);
/* Unmap a set of streaming mode DMA translations. Again, cpu read
rules concerning calls here are the same as for pci_unmap_single()
above. */
-void
-pci_unmap_sg(struct pci_dev *pdev, struct scatterlist *sg, int nents,
- int direction)
+static void alpha_pci_unmap_sg(struct device *dev, struct scatterlist *sg,
+ int nents, enum dma_data_direction dir,
+ struct dma_attrs *attrs)
{
+ struct pci_dev *pdev = alpha_gendev_to_pci(dev);
unsigned long flags;
struct pci_controller *hose;
struct pci_iommu_arena *arena;
@@ -719,7 +739,7 @@ pci_unmap_sg(struct pci_dev *pdev, struct scatterlist *sg, int nents,
dma_addr_t max_dma;
dma_addr_t fbeg, fend;
- if (direction == PCI_DMA_NONE)
+ if (dir == PCI_DMA_NONE)
BUG();
if (! alpha_mv.mv_pci_tbi)
@@ -783,15 +803,13 @@ pci_unmap_sg(struct pci_dev *pdev, struct scatterlist *sg, int nents,
DBGA("pci_unmap_sg: %ld entries\n", nents - (end - sg));
}
-EXPORT_SYMBOL(pci_unmap_sg);
-
/* Return whether the given PCI device DMA address mask can be
supported properly. */
-int
-pci_dma_supported(struct pci_dev *pdev, u64 mask)
+static int alpha_pci_supported(struct device *dev, u64 mask)
{
+ struct pci_dev *pdev = alpha_gendev_to_pci(dev);
struct pci_controller *hose;
struct pci_iommu_arena *arena;
@@ -818,7 +836,6 @@ pci_dma_supported(struct pci_dev *pdev, u64 mask)
return 0;
}
-EXPORT_SYMBOL(pci_dma_supported);
/*
@@ -918,66 +935,32 @@ iommu_unbind(struct pci_iommu_arena *arena, long pg_start, long pg_count)
return 0;
}
-/* True if the machine supports DAC addressing, and DEV can
- make use of it given MASK. */
-
-static int
-pci_dac_dma_supported(struct pci_dev *dev, u64 mask)
-{
- dma64_addr_t dac_offset = alpha_mv.pci_dac_offset;
- int ok = 1;
-
- /* If this is not set, the machine doesn't support DAC at all. */
- if (dac_offset == 0)
- ok = 0;
-
- /* The device has to be able to address our DAC bit. */
- if ((dac_offset & dev->dma_mask) != dac_offset)
- ok = 0;
-
- /* If both conditions above are met, we are fine. */
- DBGA("pci_dac_dma_supported %s from %p\n",
- ok ? "yes" : "no", __builtin_return_address(0));
-
- return ok;
-}
-
-/* Helper for generic DMA-mapping functions. */
-
-struct pci_dev *
-alpha_gendev_to_pci(struct device *dev)
+static int alpha_pci_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
- if (dev && dev->bus == &pci_bus_type)
- return to_pci_dev(dev);
-
- /* Assume that non-PCI devices asking for DMA are either ISA or EISA,
- BUG() otherwise. */
- BUG_ON(!isa_bridge);
-
- /* Assume non-busmaster ISA DMA when dma_mask is not set (the ISA
- bridge is bus master then). */
- if (!dev || !dev->dma_mask || !*dev->dma_mask)
- return isa_bridge;
-
- /* For EISA bus masters, return isa_bridge (it might have smaller
- dma_mask due to wiring limitations). */
- if (*dev->dma_mask >= isa_bridge->dma_mask)
- return isa_bridge;
-
- /* This assumes ISA bus master with dma_mask 0xffffff. */
- return NULL;
+ return dma_addr == 0;
}
-EXPORT_SYMBOL(alpha_gendev_to_pci);
-int
-dma_set_mask(struct device *dev, u64 mask)
+static int alpha_pci_set_mask(struct device *dev, u64 mask)
{
if (!dev->dma_mask ||
!pci_dma_supported(alpha_gendev_to_pci(dev), mask))
return -EIO;
*dev->dma_mask = mask;
-
return 0;
}
-EXPORT_SYMBOL(dma_set_mask);
+
+struct dma_map_ops alpha_pci_ops = {
+ .alloc_coherent = alpha_pci_alloc_coherent,
+ .free_coherent = alpha_pci_free_coherent,
+ .map_page = alpha_pci_map_page,
+ .unmap_page = alpha_pci_unmap_page,
+ .map_sg = alpha_pci_map_sg,
+ .unmap_sg = alpha_pci_unmap_sg,
+ .mapping_error = alpha_pci_mapping_error,
+ .dma_supported = alpha_pci_supported,
+ .set_dma_mask = alpha_pci_set_mask,
+};
+
+struct dma_map_ops *dma_ops = &alpha_pci_ops;
+EXPORT_SYMBOL(dma_ops);
diff --git a/arch/alpha/kernel/ptrace.c b/arch/alpha/kernel/ptrace.c
index e072041d19f8..9acadc6b16a0 100644
--- a/arch/alpha/kernel/ptrace.c
+++ b/arch/alpha/kernel/ptrace.c
@@ -249,6 +249,17 @@ ptrace_cancel_bpt(struct task_struct * child)
return (nsaved != 0);
}
+void user_enable_single_step(struct task_struct *child)
+{
+ /* Mark single stepping. */
+ task_thread_info(child)->bpt_nsaved = -1;
+}
+
+void user_disable_single_step(struct task_struct *child)
+{
+ ptrace_cancel_bpt(child);
+}
+
/*
* Called by kernel/ptrace.c when detaching..
*
@@ -256,7 +267,7 @@ ptrace_cancel_bpt(struct task_struct * child)
*/
void ptrace_disable(struct task_struct *child)
{
- ptrace_cancel_bpt(child);
+ user_disable_single_step(child);
}
long arch_ptrace(struct task_struct *child, long request, long addr, long data)
@@ -295,52 +306,6 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
DBG(DBG_MEM, ("poke $%ld<-%#lx\n", addr, data));
ret = put_reg(child, addr, data);
break;
-
- case PTRACE_SYSCALL:
- /* continue and stop at next (return from) syscall */
- case PTRACE_CONT: /* restart after signal. */
- ret = -EIO;
- if (!valid_signal(data))
- break;
- if (request == PTRACE_SYSCALL)
- set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
- else
- clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
- child->exit_code = data;
- /* make sure single-step breakpoint is gone. */
- ptrace_cancel_bpt(child);
- wake_up_process(child);
- ret = 0;
- break;
-
- /*
- * Make the child exit. Best I can do is send it a sigkill.
- * perhaps it should be put in the status that it wants to
- * exit.
- */
- case PTRACE_KILL:
- ret = 0;
- if (child->exit_state == EXIT_ZOMBIE)
- break;
- child->exit_code = SIGKILL;
- /* make sure single-step breakpoint is gone. */
- ptrace_cancel_bpt(child);
- wake_up_process(child);
- break;
-
- case PTRACE_SINGLESTEP: /* execute single instruction. */
- ret = -EIO;
- if (!valid_signal(data))
- break;
- /* Mark single stepping. */
- task_thread_info(child)->bpt_nsaved = -1;
- clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
- child->exit_code = data;
- wake_up_process(child);
- /* give it a chance to run. */
- ret = 0;
- break;
-
default:
ret = ptrace_request(child, request, addr, data);
break;