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authorLinus Torvalds <torvalds@linux-foundation.org>2018-08-22 17:38:21 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2018-08-22 17:38:21 +0300
commit9617ba395f05f2f836d078363463f8978b0f73bc (patch)
tree27e26727dd9cff328401bd064e140a6fa3e8e7f1 /arch
parent20a9e57a09d32c9149e065b73b714b9681349619 (diff)
parentc84ca616b1260949782f408271336f0eda056c61 (diff)
downloadlinux-9617ba395f05f2f836d078363463f8978b0f73bc.tar.xz
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc
Pull sparc updates from David Miller: "Nothing super serious: - Convert sparc32 over to NO_BOOTMEM (Mike Rapoport) - Use dma_noncoherent_ops on sparc32 (Christoph Hellwig) - Fix kbuild defconfig handling on sparc32 (Masahiro Yamada)" * git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc: sparc: fix KBUILD_DEFCONFIG for ARCH=sparc32 sparc32: split ramdisk detection and reservation to a helper function sparc32: switch to NO_BOOTMEM sparc: mm/init_32: kill trailing whitespace sparc: use generic dma_noncoherent_ops
Diffstat (limited to 'arch')
-rw-r--r--arch/sparc/Kconfig6
-rw-r--r--arch/sparc/Makefile6
-rw-r--r--arch/sparc/include/asm/dma-mapping.h5
-rw-r--r--arch/sparc/kernel/ioport.c193
-rw-r--r--arch/sparc/mm/init_32.c127
5 files changed, 88 insertions, 249 deletions
diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index 2d58c26bff9a..e6f2a38d2e61 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -45,9 +45,13 @@ config SPARC
select LOCKDEP_SMALL if LOCKDEP
select NEED_DMA_MAP_STATE
select NEED_SG_DMA_LENGTH
+ select HAVE_MEMBLOCK
+ select NO_BOOTMEM
config SPARC32
def_bool !64BIT
+ select ARCH_HAS_SYNC_DMA_FOR_CPU
+ select DMA_NONCOHERENT_OPS
select GENERIC_ATOMIC64
select CLZ_TAB
select HAVE_UID16
@@ -60,7 +64,6 @@ config SPARC64
select HAVE_KRETPROBES
select HAVE_KPROBES
select HAVE_RCU_TABLE_FREE if SMP
- select HAVE_MEMBLOCK
select HAVE_MEMBLOCK_NODE_MAP
select HAVE_ARCH_TRANSPARENT_HUGEPAGE
select HAVE_DYNAMIC_FTRACE
@@ -79,7 +82,6 @@ config SPARC64
select IRQ_PREFLOW_FASTEOI
select ARCH_HAVE_NMI_SAFE_CMPXCHG
select HAVE_C_RECORDMCOUNT
- select NO_BOOTMEM
select HAVE_ARCH_AUDITSYSCALL
select ARCH_SUPPORTS_ATOMIC_RMW
select HAVE_NMI
diff --git a/arch/sparc/Makefile b/arch/sparc/Makefile
index 966a13d2b127..e32ef20de567 100644
--- a/arch/sparc/Makefile
+++ b/arch/sparc/Makefile
@@ -9,10 +9,10 @@
# Copyright (C) 1998 Jakub Jelinek (jj@ultra.linux.cz)
# We are not yet configured - so test on arch
-ifeq ($(ARCH),sparc)
- KBUILD_DEFCONFIG := sparc32_defconfig
-else
+ifeq ($(ARCH),sparc64)
KBUILD_DEFCONFIG := sparc64_defconfig
+else
+ KBUILD_DEFCONFIG := sparc32_defconfig
endif
ifeq ($(CONFIG_SPARC32),y)
diff --git a/arch/sparc/include/asm/dma-mapping.h b/arch/sparc/include/asm/dma-mapping.h
index 12ae33daf52f..e17566376934 100644
--- a/arch/sparc/include/asm/dma-mapping.h
+++ b/arch/sparc/include/asm/dma-mapping.h
@@ -7,7 +7,6 @@
#include <linux/dma-debug.h>
extern const struct dma_map_ops *dma_ops;
-extern const struct dma_map_ops pci32_dma_ops;
extern struct bus_type pci_bus_type;
@@ -15,11 +14,11 @@ static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
{
#ifdef CONFIG_SPARC_LEON
if (sparc_cpu_model == sparc_leon)
- return &pci32_dma_ops;
+ return &dma_noncoherent_ops;
#endif
#if defined(CONFIG_SPARC32) && defined(CONFIG_PCI)
if (bus == &pci_bus_type)
- return &pci32_dma_ops;
+ return &dma_noncoherent_ops;
#endif
return dma_ops;
}
diff --git a/arch/sparc/kernel/ioport.c b/arch/sparc/kernel/ioport.c
index cca9134cfa7d..6799c93c9f27 100644
--- a/arch/sparc/kernel/ioport.c
+++ b/arch/sparc/kernel/ioport.c
@@ -38,6 +38,7 @@
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/scatterlist.h>
+#include <linux/dma-noncoherent.h>
#include <linux/of_device.h>
#include <asm/io.h>
@@ -434,42 +435,41 @@ arch_initcall(sparc_register_ioport);
/* Allocate and map kernel buffer using consistent mode DMA for a device.
* hwdev should be valid struct pci_dev pointer for PCI devices.
*/
-static void *pci32_alloc_coherent(struct device *dev, size_t len,
- dma_addr_t *pba, gfp_t gfp,
- unsigned long attrs)
+void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle,
+ gfp_t gfp, unsigned long attrs)
{
- unsigned long len_total = PAGE_ALIGN(len);
+ unsigned long len_total = PAGE_ALIGN(size);
void *va;
struct resource *res;
int order;
- if (len == 0) {
+ if (size == 0) {
return NULL;
}
- if (len > 256*1024) { /* __get_free_pages() limit */
+ if (size > 256*1024) { /* __get_free_pages() limit */
return NULL;
}
order = get_order(len_total);
va = (void *) __get_free_pages(gfp, order);
if (va == NULL) {
- printk("pci_alloc_consistent: no %ld pages\n", len_total>>PAGE_SHIFT);
+ printk("%s: no %ld pages\n", __func__, len_total>>PAGE_SHIFT);
goto err_nopages;
}
if ((res = kzalloc(sizeof(struct resource), GFP_KERNEL)) == NULL) {
- printk("pci_alloc_consistent: no core\n");
+ printk("%s: no core\n", __func__);
goto err_nomem;
}
if (allocate_resource(&_sparc_dvma, res, len_total,
_sparc_dvma.start, _sparc_dvma.end, PAGE_SIZE, NULL, NULL) != 0) {
- printk("pci_alloc_consistent: cannot occupy 0x%lx", len_total);
+ printk("%s: cannot occupy 0x%lx", __func__, len_total);
goto err_nova;
}
srmmu_mapiorange(0, virt_to_phys(va), res->start, len_total);
- *pba = virt_to_phys(va); /* equals virt_to_bus (R.I.P.) for us. */
+ *dma_handle = virt_to_phys(va);
return (void *) res->start;
err_nova:
@@ -481,184 +481,53 @@ err_nopages:
}
/* Free and unmap a consistent DMA buffer.
- * cpu_addr is what was returned from pci_alloc_consistent,
- * size must be the same as what as passed into pci_alloc_consistent,
- * and likewise dma_addr must be the same as what *dma_addrp was set to.
+ * cpu_addr is what was returned arch_dma_alloc, size must be the same as what
+ * was passed into arch_dma_alloc, and likewise dma_addr must be the same as
+ * what *dma_ndler was set to.
*
* References to the memory and mappings associated with cpu_addr/dma_addr
* past this call are illegal.
*/
-static void pci32_free_coherent(struct device *dev, size_t n, void *p,
- dma_addr_t ba, unsigned long attrs)
+void arch_dma_free(struct device *dev, size_t size, void *cpu_addr,
+ dma_addr_t dma_addr, unsigned long attrs)
{
struct resource *res;
if ((res = lookup_resource(&_sparc_dvma,
- (unsigned long)p)) == NULL) {
- printk("pci_free_consistent: cannot free %p\n", p);
+ (unsigned long)cpu_addr)) == NULL) {
+ printk("%s: cannot free %p\n", __func__, cpu_addr);
return;
}
- if (((unsigned long)p & (PAGE_SIZE-1)) != 0) {
- printk("pci_free_consistent: unaligned va %p\n", p);
+ if (((unsigned long)cpu_addr & (PAGE_SIZE-1)) != 0) {
+ printk("%s: unaligned va %p\n", __func__, cpu_addr);
return;
}
- n = PAGE_ALIGN(n);
- if (resource_size(res) != n) {
- printk("pci_free_consistent: region 0x%lx asked 0x%lx\n",
- (long)resource_size(res), (long)n);
+ size = PAGE_ALIGN(size);
+ if (resource_size(res) != size) {
+ printk("%s: region 0x%lx asked 0x%zx\n", __func__,
+ (long)resource_size(res), size);
return;
}
- dma_make_coherent(ba, n);
- srmmu_unmapiorange((unsigned long)p, n);
+ dma_make_coherent(dma_addr, size);
+ srmmu_unmapiorange((unsigned long)cpu_addr, size);
release_resource(res);
kfree(res);
- free_pages((unsigned long)phys_to_virt(ba), get_order(n));
-}
-
-/*
- * Same as pci_map_single, but with pages.
- */
-static dma_addr_t pci32_map_page(struct device *dev, struct page *page,
- unsigned long offset, size_t size,
- enum dma_data_direction dir,
- unsigned long attrs)
-{
- /* IIep is write-through, not flushing. */
- return page_to_phys(page) + offset;
-}
-
-static void pci32_unmap_page(struct device *dev, dma_addr_t ba, size_t size,
- enum dma_data_direction dir, unsigned long attrs)
-{
- if (dir != PCI_DMA_TODEVICE && !(attrs & DMA_ATTR_SKIP_CPU_SYNC))
- dma_make_coherent(ba, PAGE_ALIGN(size));
-}
-
-/* Map a set of buffers described by scatterlist in streaming
- * mode for DMA. This is the scatter-gather version of the
- * above pci_map_single interface. Here the scatter gather list
- * elements are each tagged with the appropriate dma address
- * and length. They are obtained via sg_dma_{address,length}(SG).
- *
- * NOTE: An implementation may be able to use a smaller number of
- * DMA address/length pairs than there are SG table elements.
- * (for example via virtual mapping capabilities)
- * The routine returns the number of addr/length pairs actually
- * used, at most nents.
- *
- * Device ownership issues as mentioned above for pci_map_single are
- * the same here.
- */
-static int pci32_map_sg(struct device *device, struct scatterlist *sgl,
- int nents, enum dma_data_direction dir,
- unsigned long attrs)
-{
- struct scatterlist *sg;
- int n;
-
- /* IIep is write-through, not flushing. */
- for_each_sg(sgl, sg, nents, n) {
- sg->dma_address = sg_phys(sg);
- sg->dma_length = sg->length;
- }
- return nents;
-}
-
-/* Unmap a set of streaming mode DMA translations.
- * Again, cpu read rules concerning calls here are the same as for
- * pci_unmap_single() above.
- */
-static void pci32_unmap_sg(struct device *dev, struct scatterlist *sgl,
- int nents, enum dma_data_direction dir,
- unsigned long attrs)
-{
- struct scatterlist *sg;
- int n;
-
- if (dir != PCI_DMA_TODEVICE && !(attrs & DMA_ATTR_SKIP_CPU_SYNC)) {
- for_each_sg(sgl, sg, nents, n) {
- dma_make_coherent(sg_phys(sg), PAGE_ALIGN(sg->length));
- }
- }
-}
-
-/* Make physical memory consistent for a single
- * streaming mode DMA translation before or after a transfer.
- *
- * If you perform a pci_map_single() but wish to interrogate the
- * buffer using the cpu, yet do not wish to teardown the PCI dma
- * mapping, you must call this function before doing so. At the
- * next point you give the PCI dma address back to the card, you
- * must first perform a pci_dma_sync_for_device, and then the
- * device again owns the buffer.
- */
-static void pci32_sync_single_for_cpu(struct device *dev, dma_addr_t ba,
- size_t size, enum dma_data_direction dir)
-{
- if (dir != PCI_DMA_TODEVICE) {
- dma_make_coherent(ba, PAGE_ALIGN(size));
- }
-}
-
-static void pci32_sync_single_for_device(struct device *dev, dma_addr_t ba,
- size_t size, enum dma_data_direction dir)
-{
- if (dir != PCI_DMA_TODEVICE) {
- dma_make_coherent(ba, PAGE_ALIGN(size));
- }
+ free_pages((unsigned long)phys_to_virt(dma_addr), get_order(size));
}
-/* Make physical memory consistent for a set of streaming
- * mode DMA translations after a transfer.
- *
- * The same as pci_dma_sync_single_* but for a scatter-gather list,
- * same rules and usage.
- */
-static void pci32_sync_sg_for_cpu(struct device *dev, struct scatterlist *sgl,
- int nents, enum dma_data_direction dir)
-{
- struct scatterlist *sg;
- int n;
-
- if (dir != PCI_DMA_TODEVICE) {
- for_each_sg(sgl, sg, nents, n) {
- dma_make_coherent(sg_phys(sg), PAGE_ALIGN(sg->length));
- }
- }
-}
+/* IIep is write-through, not flushing on cpu to device transfer. */
-static void pci32_sync_sg_for_device(struct device *device, struct scatterlist *sgl,
- int nents, enum dma_data_direction dir)
+void arch_sync_dma_for_cpu(struct device *dev, phys_addr_t paddr,
+ size_t size, enum dma_data_direction dir)
{
- struct scatterlist *sg;
- int n;
-
- if (dir != PCI_DMA_TODEVICE) {
- for_each_sg(sgl, sg, nents, n) {
- dma_make_coherent(sg_phys(sg), PAGE_ALIGN(sg->length));
- }
- }
+ if (dir != PCI_DMA_TODEVICE)
+ dma_make_coherent(paddr, PAGE_ALIGN(size));
}
-/* note: leon re-uses pci32_dma_ops */
-const struct dma_map_ops pci32_dma_ops = {
- .alloc = pci32_alloc_coherent,
- .free = pci32_free_coherent,
- .map_page = pci32_map_page,
- .unmap_page = pci32_unmap_page,
- .map_sg = pci32_map_sg,
- .unmap_sg = pci32_unmap_sg,
- .sync_single_for_cpu = pci32_sync_single_for_cpu,
- .sync_single_for_device = pci32_sync_single_for_device,
- .sync_sg_for_cpu = pci32_sync_sg_for_cpu,
- .sync_sg_for_device = pci32_sync_sg_for_device,
-};
-EXPORT_SYMBOL(pci32_dma_ops);
-
const struct dma_map_ops *dma_ops = &sbus_dma_ops;
EXPORT_SYMBOL(dma_ops);
diff --git a/arch/sparc/mm/init_32.c b/arch/sparc/mm/init_32.c
index 95fe4f081ba3..92634d4e440c 100644
--- a/arch/sparc/mm/init_32.c
+++ b/arch/sparc/mm/init_32.c
@@ -23,6 +23,7 @@
#include <linux/init.h>
#include <linux/highmem.h>
#include <linux/bootmem.h>
+#include <linux/memblock.h>
#include <linux/pagemap.h>
#include <linux/poison.h>
#include <linux/gfp.h>
@@ -101,13 +102,46 @@ static unsigned long calc_max_low_pfn(void)
return tmp;
}
+static void __init find_ramdisk(unsigned long end_of_phys_memory)
+{
+#ifdef CONFIG_BLK_DEV_INITRD
+ unsigned long size;
+
+ /* Now have to check initial ramdisk, so that it won't pass
+ * the end of memory
+ */
+ if (sparc_ramdisk_image) {
+ if (sparc_ramdisk_image >= (unsigned long)&_end - 2 * PAGE_SIZE)
+ sparc_ramdisk_image -= KERNBASE;
+ initrd_start = sparc_ramdisk_image + phys_base;
+ initrd_end = initrd_start + sparc_ramdisk_size;
+ if (initrd_end > end_of_phys_memory) {
+ printk(KERN_CRIT "initrd extends beyond end of memory "
+ "(0x%016lx > 0x%016lx)\ndisabling initrd\n",
+ initrd_end, end_of_phys_memory);
+ initrd_start = 0;
+ } else {
+ /* Reserve the initrd image area. */
+ size = initrd_end - initrd_start;
+ memblock_reserve(initrd_start, size);
+
+ initrd_start = (initrd_start - phys_base) + PAGE_OFFSET;
+ initrd_end = (initrd_end - phys_base) + PAGE_OFFSET;
+ }
+ }
+#endif
+}
+
unsigned long __init bootmem_init(unsigned long *pages_avail)
{
- unsigned long bootmap_size, start_pfn;
- unsigned long end_of_phys_memory = 0UL;
- unsigned long bootmap_pfn, bytes_avail, size;
+ unsigned long start_pfn, bytes_avail, size;
+ unsigned long end_of_phys_memory = 0;
+ unsigned long high_pages = 0;
int i;
+ memblock_set_bottom_up(true);
+ memblock_allow_resize();
+
bytes_avail = 0UL;
for (i = 0; sp_banks[i].num_bytes != 0; i++) {
end_of_phys_memory = sp_banks[i].base_addr +
@@ -124,24 +158,25 @@ unsigned long __init bootmem_init(unsigned long *pages_avail)
if (sp_banks[i].num_bytes == 0) {
sp_banks[i].base_addr = 0xdeadbeef;
} else {
+ memblock_add(sp_banks[i].base_addr,
+ sp_banks[i].num_bytes);
sp_banks[i+1].num_bytes = 0;
sp_banks[i+1].base_addr = 0xdeadbeef;
}
break;
}
}
+ memblock_add(sp_banks[i].base_addr, sp_banks[i].num_bytes);
}
/* Start with page aligned address of last symbol in kernel
- * image.
+ * image.
*/
start_pfn = (unsigned long)__pa(PAGE_ALIGN((unsigned long) &_end));
/* Now shift down to get the real physical page frame number. */
start_pfn >>= PAGE_SHIFT;
- bootmap_pfn = start_pfn;
-
max_pfn = end_of_phys_memory >> PAGE_SHIFT;
max_low_pfn = max_pfn;
@@ -150,85 +185,19 @@ unsigned long __init bootmem_init(unsigned long *pages_avail)
if (max_low_pfn > pfn_base + (SRMMU_MAXMEM >> PAGE_SHIFT)) {
highstart_pfn = pfn_base + (SRMMU_MAXMEM >> PAGE_SHIFT);
max_low_pfn = calc_max_low_pfn();
+ high_pages = calc_highpages();
printk(KERN_NOTICE "%ldMB HIGHMEM available.\n",
- calc_highpages() >> (20 - PAGE_SHIFT));
+ high_pages >> (20 - PAGE_SHIFT));
}
-#ifdef CONFIG_BLK_DEV_INITRD
- /* Now have to check initial ramdisk, so that bootmap does not overwrite it */
- if (sparc_ramdisk_image) {
- if (sparc_ramdisk_image >= (unsigned long)&_end - 2 * PAGE_SIZE)
- sparc_ramdisk_image -= KERNBASE;
- initrd_start = sparc_ramdisk_image + phys_base;
- initrd_end = initrd_start + sparc_ramdisk_size;
- if (initrd_end > end_of_phys_memory) {
- printk(KERN_CRIT "initrd extends beyond end of memory "
- "(0x%016lx > 0x%016lx)\ndisabling initrd\n",
- initrd_end, end_of_phys_memory);
- initrd_start = 0;
- }
- if (initrd_start) {
- if (initrd_start >= (start_pfn << PAGE_SHIFT) &&
- initrd_start < (start_pfn << PAGE_SHIFT) + 2 * PAGE_SIZE)
- bootmap_pfn = PAGE_ALIGN (initrd_end) >> PAGE_SHIFT;
- }
- }
-#endif
- /* Initialize the boot-time allocator. */
- bootmap_size = init_bootmem_node(NODE_DATA(0), bootmap_pfn, pfn_base,
- max_low_pfn);
-
- /* Now register the available physical memory with the
- * allocator.
- */
- *pages_avail = 0;
- for (i = 0; sp_banks[i].num_bytes != 0; i++) {
- unsigned long curr_pfn, last_pfn;
+ find_ramdisk(end_of_phys_memory);
- curr_pfn = sp_banks[i].base_addr >> PAGE_SHIFT;
- if (curr_pfn >= max_low_pfn)
- break;
-
- last_pfn = (sp_banks[i].base_addr + sp_banks[i].num_bytes) >> PAGE_SHIFT;
- if (last_pfn > max_low_pfn)
- last_pfn = max_low_pfn;
-
- /*
- * .. finally, did all the rounding and playing
- * around just make the area go away?
- */
- if (last_pfn <= curr_pfn)
- continue;
-
- size = (last_pfn - curr_pfn) << PAGE_SHIFT;
- *pages_avail += last_pfn - curr_pfn;
-
- free_bootmem(sp_banks[i].base_addr, size);
- }
-
-#ifdef CONFIG_BLK_DEV_INITRD
- if (initrd_start) {
- /* Reserve the initrd image area. */
- size = initrd_end - initrd_start;
- reserve_bootmem(initrd_start, size, BOOTMEM_DEFAULT);
- *pages_avail -= PAGE_ALIGN(size) >> PAGE_SHIFT;
-
- initrd_start = (initrd_start - phys_base) + PAGE_OFFSET;
- initrd_end = (initrd_end - phys_base) + PAGE_OFFSET;
- }
-#endif
/* Reserve the kernel text/data/bss. */
size = (start_pfn << PAGE_SHIFT) - phys_base;
- reserve_bootmem(phys_base, size, BOOTMEM_DEFAULT);
- *pages_avail -= PAGE_ALIGN(size) >> PAGE_SHIFT;
+ memblock_reserve(phys_base, size);
- /* Reserve the bootmem map. We do not account for it
- * in pages_avail because we will release that memory
- * in free_all_bootmem.
- */
- size = bootmap_size;
- reserve_bootmem((bootmap_pfn << PAGE_SHIFT), size, BOOTMEM_DEFAULT);
- *pages_avail -= PAGE_ALIGN(size) >> PAGE_SHIFT;
+ size = memblock_phys_mem_size() - memblock_reserved_size();
+ *pages_avail = (size >> PAGE_SHIFT) - high_pages;
return max_pfn;
}
@@ -322,7 +291,7 @@ void __init mem_init(void)
map_high_region(start_pfn, end_pfn);
}
-
+
mem_init_print_info(NULL);
}