** PARISC 1.1 Dynamic DMA mapping support.
** This implementation is for PA-RISC platforms that do not support
** I/O TLBs (aka DMA address translation hardware).
-** See Documentation/DMA-mapping.txt for interface definitions.
+** See Documentation/PCI/PCI-DMA-mapping.txt for interface definitions.
**
** (c) Copyright 1999,2000 Hewlett-Packard Company
** (c) Copyright 2000 Grant Grundler
#include <linux/mm.h>
#include <linux/pci.h>
#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/types.h>
+#include <linux/scatterlist.h>
#include <asm/cacheflush.h>
#include <asm/dma.h> /* for DMA_CHUNK_SIZE */
#include <asm/uaccess.h>
#include <asm/tlbflush.h> /* for purge_tlb_*() macros */
-static struct proc_dir_entry * proc_gsc_root = NULL;
-static int pcxl_proc_info(char *buffer, char **start, off_t offset, int length);
-static unsigned long pcxl_used_bytes = 0;
-static unsigned long pcxl_used_pages = 0;
+static struct proc_dir_entry * proc_gsc_root __read_mostly = NULL;
+static unsigned long pcxl_used_bytes __read_mostly = 0;
+static unsigned long pcxl_used_pages __read_mostly = 0;
extern unsigned long pcxl_dma_start; /* Start of pcxl dma mapping area */
static spinlock_t pcxl_res_lock;
if (end > PMD_SIZE)
end = PMD_SIZE;
do {
+ unsigned long flags;
+
if (!pte_none(*pte))
printk(KERN_ERR "map_pte_uncached: page already exists\n");
set_pte(pte, __mk_pte(*paddr_ptr, PAGE_KERNEL_UNC));
- purge_tlb_start();
+ purge_tlb_start(flags);
pdtlb_kernel(orig_vaddr);
- purge_tlb_end();
+ purge_tlb_end(flags);
vaddr += PAGE_SIZE;
orig_vaddr += PAGE_SIZE;
(*paddr_ptr) += PAGE_SIZE;
if (end > PGDIR_SIZE)
end = PGDIR_SIZE;
do {
- pte_t * pte = pte_alloc_kernel(&init_mm, pmd, vaddr);
+ pte_t * pte = pte_alloc_kernel(pmd, vaddr);
if (!pte)
return -ENOMEM;
if (map_pte_uncached(pte, orig_vaddr, end - vaddr, paddr_ptr))
if (end > PMD_SIZE)
end = PMD_SIZE;
do {
+ unsigned long flags;
pte_t page = *pte;
+
pte_clear(&init_mm, vaddr, pte);
- purge_tlb_start();
+ purge_tlb_start(flags);
pdtlb_kernel(orig_vaddr);
- purge_tlb_end();
+ purge_tlb_end(flags);
vaddr += PAGE_SIZE;
orig_vaddr += PAGE_SIZE;
pte++;
dump_resmap();
}
+static int proc_pcxl_dma_show(struct seq_file *m, void *v)
+{
+#if 0
+ u_long i = 0;
+ unsigned long *res_ptr = (u_long *)pcxl_res_map;
+#endif
+ unsigned long total_pages = pcxl_res_size << 3; /* 8 bits per byte */
+
+ seq_printf(m, "\nDMA Mapping Area size : %d bytes (%ld pages)\n",
+ PCXL_DMA_MAP_SIZE, total_pages);
+
+ seq_printf(m, "Resource bitmap : %d bytes\n", pcxl_res_size);
+
+ seq_puts(m, " total: free: used: % used:\n");
+ seq_printf(m, "blocks %8d %8ld %8ld %8ld%%\n", pcxl_res_size,
+ pcxl_res_size - pcxl_used_bytes, pcxl_used_bytes,
+ (pcxl_used_bytes * 100) / pcxl_res_size);
+
+ seq_printf(m, "pages %8ld %8ld %8ld %8ld%%\n", total_pages,
+ total_pages - pcxl_used_pages, pcxl_used_pages,
+ (pcxl_used_pages * 100 / total_pages));
+
+#if 0
+ seq_puts(m, "\nResource bitmap:");
+
+ for(; i < (pcxl_res_size / sizeof(u_long)); ++i, ++res_ptr) {
+ if ((i & 7) == 0)
+ seq_puts(m,"\n ");
+ seq_printf(m, "%s %08lx", buf, *res_ptr);
+ }
+#endif
+ seq_putc(m, '\n');
+ return 0;
+}
+
+static int proc_pcxl_dma_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, proc_pcxl_dma_show, NULL);
+}
+
+static const struct file_operations proc_pcxl_dma_ops = {
+ .owner = THIS_MODULE,
+ .open = proc_pcxl_dma_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
static int __init
pcxl_dma_init(void)
{
pcxl_res_map = (char *)__get_free_pages(GFP_KERNEL,
get_order(pcxl_res_size));
memset(pcxl_res_map, 0, pcxl_res_size);
- proc_gsc_root = proc_mkdir("gsc", 0);
+ proc_gsc_root = proc_mkdir("gsc", NULL);
if (!proc_gsc_root)
printk(KERN_WARNING
"pcxl_dma_init: Unable to create gsc /proc dir entry\n");
else {
struct proc_dir_entry* ent;
- ent = create_proc_info_entry("pcxl_dma", 0,
- proc_gsc_root, pcxl_proc_info);
+ ent = proc_create("pcxl_dma", 0, proc_gsc_root,
+ &proc_pcxl_dma_ops);
if (!ent)
printk(KERN_WARNING
"pci-dma.c: Unable to create pcxl_dma /proc entry.\n");
__initcall(pcxl_dma_init);
-static void * pa11_dma_alloc_consistent (struct device *dev, size_t size, dma_addr_t *dma_handle, int flag)
+static void * pa11_dma_alloc_consistent (struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t flag)
{
unsigned long vaddr;
unsigned long paddr;
static dma_addr_t pa11_dma_map_single(struct device *dev, void *addr, size_t size, enum dma_data_direction direction)
{
- if (direction == DMA_NONE) {
- printk(KERN_ERR "pa11_dma_map_single(PCI_DMA_NONE) called by %p\n", __builtin_return_address(0));
- BUG();
- }
+ BUG_ON(direction == DMA_NONE);
flush_kernel_dcache_range((unsigned long) addr, size);
return virt_to_phys(addr);
static void pa11_dma_unmap_single(struct device *dev, dma_addr_t dma_handle, size_t size, enum dma_data_direction direction)
{
- if (direction == DMA_NONE) {
- printk(KERN_ERR "pa11_dma_unmap_single(PCI_DMA_NONE) called by %p\n", __builtin_return_address(0));
- BUG();
- }
+ BUG_ON(direction == DMA_NONE);
if (direction == DMA_TO_DEVICE)
return;
{
int i;
- if (direction == DMA_NONE)
- BUG();
+ BUG_ON(direction == DMA_NONE);
for (i = 0; i < nents; i++, sglist++ ) {
unsigned long vaddr = sg_virt_addr(sglist);
{
int i;
- if (direction == DMA_NONE)
- BUG();
+ BUG_ON(direction == DMA_NONE);
if (direction == DMA_TO_DEVICE)
return;
static void pa11_dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, unsigned long offset, size_t size, enum dma_data_direction direction)
{
- if (direction == DMA_NONE)
- BUG();
+ BUG_ON(direction == DMA_NONE);
flush_kernel_dcache_range((unsigned long) phys_to_virt(dma_handle) + offset, size);
}
static void pa11_dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, unsigned long offset, size_t size, enum dma_data_direction direction)
{
- if (direction == DMA_NONE)
- BUG();
+ BUG_ON(direction == DMA_NONE);
flush_kernel_dcache_range((unsigned long) phys_to_virt(dma_handle) + offset, size);
}
};
static void *fail_alloc_consistent(struct device *dev, size_t size,
- dma_addr_t *dma_handle, int flag)
+ dma_addr_t *dma_handle, gfp_t flag)
{
return NULL;
}
static void *pa11_dma_alloc_noncoherent(struct device *dev, size_t size,
- dma_addr_t *dma_handle, int flag)
+ dma_addr_t *dma_handle, gfp_t flag)
{
- void *addr = NULL;
+ void *addr;
- /* rely on kmalloc to be cacheline aligned */
- addr = kmalloc(size, flag);
- if(addr)
+ addr = (void *)__get_free_pages(flag, get_order(size));
+ if (addr)
*dma_handle = (dma_addr_t)virt_to_phys(addr);
return addr;
static void pa11_dma_free_noncoherent(struct device *dev, size_t size,
void *vaddr, dma_addr_t iova)
{
- kfree(vaddr);
+ free_pages((unsigned long)vaddr, get_order(size));
return;
}
.dma_sync_sg_for_cpu = pa11_dma_sync_sg_for_cpu,
.dma_sync_sg_for_device = pa11_dma_sync_sg_for_device,
};
-
-
-static int pcxl_proc_info(char *buf, char **start, off_t offset, int len)
-{
-#if 0
- u_long i = 0;
- unsigned long *res_ptr = (u_long *)pcxl_res_map;
-#endif
- unsigned long total_pages = pcxl_res_size << 3; /* 8 bits per byte */
-
- sprintf(buf, "\nDMA Mapping Area size : %d bytes (%ld pages)\n",
- PCXL_DMA_MAP_SIZE, total_pages);
-
- sprintf(buf, "%sResource bitmap : %d bytes\n", buf, pcxl_res_size);
-
- strcat(buf, " total: free: used: % used:\n");
- sprintf(buf, "%sblocks %8d %8ld %8ld %8ld%%\n", buf, pcxl_res_size,
- pcxl_res_size - pcxl_used_bytes, pcxl_used_bytes,
- (pcxl_used_bytes * 100) / pcxl_res_size);
-
- sprintf(buf, "%spages %8ld %8ld %8ld %8ld%%\n", buf, total_pages,
- total_pages - pcxl_used_pages, pcxl_used_pages,
- (pcxl_used_pages * 100 / total_pages));
-
-#if 0
- strcat(buf, "\nResource bitmap:");
-
- for(; i < (pcxl_res_size / sizeof(u_long)); ++i, ++res_ptr) {
- if ((i & 7) == 0)
- strcat(buf,"\n ");
- sprintf(buf, "%s %08lx", buf, *res_ptr);
- }
-#endif
- strcat(buf, "\n");
- return strlen(buf);
-}
-
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff