Release 4.9 arch/parisc/kernel/pci-dma.c

Directory: arch/parisc/kernel
/*
** 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-API-HOWTO.txt for interface definitions.
**
**      (c) Copyright 1999,2000 Hewlett-Packard Company
**      (c) Copyright 2000 Grant Grundler
**      (c) Copyright 2000 Philipp Rumpf <prumpf@tux.org>
**      (c) Copyright 2000 John Marvin
**
** "leveraged" from 2.3.47: arch/ia64/kernel/pci-dma.c.
** (I assume it's from David Mosberger-Tang but there was no Copyright)
**
** AFAIK, all PA7100LC and PA7300LC platforms can use this code.
**
** - ggg
*/

#include <linux/init.h>
#include <linux/gfp.h>
#include <linux/mm.h>
#include <linux/pci.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/string.h>
#include <linux/types.h>
#include <linux/scatterlist.h>
#include <linux/export.h>

#include <asm/cacheflush.h>
#include <asm/dma.h>    /* for DMA_CHUNK_SIZE */
#include <asm/io.h>
#include <asm/page.h>	/* get_order */
#include <asm/pgalloc.h>
#include <asm/uaccess.h>
#include <asm/tlbflush.h>	/* for purge_tlb_*() macros */


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;

static char    *pcxl_res_map;

static int     pcxl_res_hint;

static int     pcxl_res_size;

#ifdef DEBUG_PCXL_RESOURCE

#define DBG_RES(x...)	printk(x)
#else

#define DBG_RES(x...)
#endif


/*
** Dump a hex representation of the resource map.
*/

#ifdef DUMP_RESMAP

static

void dump_resmap(void)
{
	u_long *res_ptr = (unsigned long *)pcxl_res_map;
	u_long i = 0;

	printk("res_map: ");
	for(; i < (pcxl_res_size / sizeof(unsigned long)); ++i, ++res_ptr)
		printk("%08lx ", *res_ptr);

	printk("\n");
}
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#else


static inline void dump_resmap(void) {;}
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#endif



static int pa11_dma_supported( struct device *dev, u64 mask)
{
	return 1;
}

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Total 17 100.00% 3 100.00%



static inline int map_pte_uncached(pte_t * pte,
		unsigned long vaddr,
		unsigned long size, unsigned long *paddr_ptr)
{
	unsigned long end;
	unsigned long orig_vaddr = vaddr;

	vaddr &= ~PMD_MASK;
	end = vaddr + size;
	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");
		purge_tlb_start(flags);
		set_pte(pte, __mk_pte(*paddr_ptr, PAGE_KERNEL_UNC));
		pdtlb_kernel(orig_vaddr);
		purge_tlb_end(flags);
		vaddr += PAGE_SIZE;
		orig_vaddr += PAGE_SIZE;
		(*paddr_ptr) += PAGE_SIZE;
		pte++;
	} while (vaddr < end);
	return 0;
}

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matthew wilcox matthew wilcox 2 1.50% 1 25.00%
Total 133 100.00% 4 100.00%



static inline int map_pmd_uncached(pmd_t * pmd, unsigned long vaddr,
		unsigned long size, unsigned long *paddr_ptr)
{
	unsigned long end;
	unsigned long orig_vaddr = vaddr;

	vaddr &= ~PGDIR_MASK;
	end = vaddr + size;
	if (end > PGDIR_SIZE)
		end = PGDIR_SIZE;
	do {
		pte_t * pte = pte_alloc_kernel(pmd, vaddr);
		if (!pte)
			return -ENOMEM;
		if (map_pte_uncached(pte, orig_vaddr, end - vaddr, paddr_ptr))
			return -ENOMEM;
		vaddr = (vaddr + PMD_SIZE) & PMD_MASK;
		orig_vaddr += PMD_SIZE;
		pmd++;
	} while (vaddr < end);
	return 0;
}

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static inline int map_uncached_pages(unsigned long vaddr, unsigned long size,
		unsigned long paddr)
{
	pgd_t * dir;
	unsigned long end = vaddr + size;

	dir = pgd_offset_k(vaddr);
	do {
		pmd_t *pmd;
		
		pmd = pmd_alloc(NULL, dir, vaddr);
		if (!pmd)
			return -ENOMEM;
		if (map_pmd_uncached(pmd, vaddr, end - vaddr, &paddr))
			return -ENOMEM;
		vaddr = vaddr + PGDIR_SIZE;
		dir++;
	} while (vaddr && (vaddr < end));
	return 0;
}

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Total 108 100.00% 2 100.00%



static inline void unmap_uncached_pte(pmd_t * pmd, unsigned long vaddr,
		unsigned long size)
{
	pte_t * pte;
	unsigned long end;
	unsigned long orig_vaddr = vaddr;

	if (pmd_none(*pmd))
		return;
	if (pmd_bad(*pmd)) {
		pmd_ERROR(*pmd);
		pmd_clear(pmd);
		return;
	}
	pte = pte_offset_map(pmd, vaddr);
	vaddr &= ~PMD_MASK;
	end = vaddr + size;
	if (end > PMD_SIZE)
		end = PMD_SIZE;
	do {
		unsigned long flags;
		pte_t page = *pte;

		pte_clear(&init_mm, vaddr, pte);
		purge_tlb_start(flags);
		pdtlb_kernel(orig_vaddr);
		purge_tlb_end(flags);
		vaddr += PAGE_SIZE;
		orig_vaddr += PAGE_SIZE;
		pte++;
		if (pte_none(page) || pte_present(page))
			continue;
		printk(KERN_CRIT "Whee.. Swapped out page in kernel page table\n");
	} while (vaddr < end);
}

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matthew wilcox matthew wilcox 5 2.96% 2 40.00%
david s. miller david s. miller 5 2.96% 1 20.00%
Total 169 100.00% 5 100.00%



static inline void unmap_uncached_pmd(pgd_t * dir, unsigned long vaddr,
		unsigned long size)
{
	pmd_t * pmd;
	unsigned long end;
	unsigned long orig_vaddr = vaddr;

	if (pgd_none(*dir))
		return;
	if (pgd_bad(*dir)) {
		pgd_ERROR(*dir);
		pgd_clear(dir);
		return;
	}
	pmd = pmd_offset(dir, vaddr);
	vaddr &= ~PGDIR_MASK;
	end = vaddr + size;
	if (end > PGDIR_SIZE)
		end = PGDIR_SIZE;
	do {
		unmap_uncached_pte(pmd, orig_vaddr, end - vaddr);
		vaddr = (vaddr + PMD_SIZE) & PMD_MASK;
		orig_vaddr += PMD_SIZE;
		pmd++;
	} while (vaddr < end);
}

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static void unmap_uncached_pages(unsigned long vaddr, unsigned long size)
{
	pgd_t * dir;
	unsigned long end = vaddr + size;

	dir = pgd_offset_k(vaddr);
	do {
		unmap_uncached_pmd(dir, vaddr, end - vaddr);
		vaddr = vaddr + PGDIR_SIZE;
		dir++;
	} while (vaddr && (vaddr < end));
}

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#define PCXL_SEARCH_LOOP(idx, mask, size)  \
       for(; res_ptr < res_end; ++res_ptr) \
       { \
               if(0 == ((*res_ptr) & mask)) { \
                       *res_ptr |= mask; \
                       idx = (int)((u_long)res_ptr - (u_long)pcxl_res_map); \
                       pcxl_res_hint = idx + (size >> 3); \
                       goto resource_found; \
               } \
       }


#define PCXL_FIND_FREE_MAPPING(idx, mask, size)  { \
       u##size *res_ptr = (u##size *)&(pcxl_res_map[pcxl_res_hint & ~((size >> 3) - 1)]); \
       u##size *res_end = (u##size *)&pcxl_res_map[pcxl_res_size]; \
       PCXL_SEARCH_LOOP(idx, mask, size); \
       res_ptr = (u##size *)&pcxl_res_map[0]; \
       PCXL_SEARCH_LOOP(idx, mask, size); \
}


unsigned long

pcxl_alloc_range(size_t size)
{
	int res_idx;
	u_long mask, flags;
	unsigned int pages_needed = size >> PAGE_SHIFT;

	mask = (u_long) -1L;
 	mask >>= BITS_PER_LONG - pages_needed;

	DBG_RES("pcxl_alloc_range() size: %d pages_needed %d pages_mask 0x%08lx\n", 
		size, pages_needed, mask);

	spin_lock_irqsave(&pcxl_res_lock, flags);

	if(pages_needed <= 8) {
		PCXL_FIND_FREE_MAPPING(res_idx, mask, 8);
	} else if(pages_needed <= 16) {
		PCXL_FIND_FREE_MAPPING(res_idx, mask, 16);
	} else if(pages_needed <= 32) {
		PCXL_FIND_FREE_MAPPING(res_idx, mask, 32);
	} else {
		panic("%s: pcxl_alloc_range() Too many pages to map.\n",
		      __FILE__);
	}

	dump_resmap();
	panic("%s: pcxl_alloc_range() out of dma mapping resources\n",
	      __FILE__);
	
resource_found:
	
	DBG_RES("pcxl_alloc_range() res_idx %d mask 0x%08lx res_hint: %d\n",
		res_idx, mask, pcxl_res_hint);

	pcxl_used_pages += pages_needed;
	pcxl_used_bytes += ((pages_needed >> 3) ? (pages_needed >> 3) : 1);

	spin_unlock_irqrestore(&pcxl_res_lock, flags);

	dump_resmap();

	/* 
        ** return the corresponding vaddr in the pcxl dma map
        */
	return (pcxl_dma_start + (res_idx << (PAGE_SHIFT + 3)));
}

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Total 193 100.00% 2 100.00%


#define PCXL_FREE_MAPPINGS(idx, m, size) \
		u##size *res_ptr = (u##size *)&(pcxl_res_map[(idx) + (((size >> 3) - 1) & (~((size >> 3) - 1)))]); \
		/* BUG_ON((*res_ptr & m) != m); */ \
                *res_ptr &= ~m;

/*
** clear bits in the pcxl resource map
*/

static void

pcxl_free_range(unsigned long vaddr, size_t size)
{
	u_long mask, flags;
	unsigned int res_idx = (vaddr - pcxl_dma_start) >> (PAGE_SHIFT + 3);
	unsigned int pages_mapped = size >> PAGE_SHIFT;

	mask = (u_long) -1L;
 	mask >>= BITS_PER_LONG - pages_mapped;

	DBG_RES("pcxl_free_range() res_idx: %d size: %d pages_mapped %d mask 0x%08lx\n", 
		res_idx, size, pages_mapped, mask);

	spin_lock_irqsave(&pcxl_res_lock, flags);

	if(pages_mapped <= 8) {
		PCXL_FREE_MAPPINGS(res_idx, mask, 8);
	} else if(pages_mapped <= 16) {
		PCXL_FREE_MAPPINGS(res_idx, mask, 16);
	} else if(pages_mapped <= 32) {
		PCXL_FREE_MAPPINGS(res_idx, mask, 32);
	} else {
		panic("%s: pcxl_free_range() Too many pages to unmap.\n",
		      __FILE__);
	}
	
	pcxl_used_pages -= (pages_mapped ? pages_mapped : 1);
	pcxl_used_bytes -= ((pages_mapped >> 3) ? (pages_mapped >> 3) : 1);

	spin_unlock_irqrestore(&pcxl_res_lock, flags);

	dump_resmap();
}

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Total 179 100.00% 2 100.00%



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;
}

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static int proc_pcxl_dma_open(struct inode *inode, struct file *file)
{
	return single_open(file, proc_pcxl_dma_show, NULL);
}

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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)
{
	if (pcxl_dma_start == 0)
		return 0;

	spin_lock_init(&pcxl_res_lock);
	pcxl_res_size = PCXL_DMA_MAP_SIZE >> (PAGE_SHIFT + 3);
	pcxl_res_hint = 0;
	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", 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 = 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");
	}
	return 0;
}

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matthew wilcox matthew wilcox 10 8.40% 2 40.00%
denis v. lunev denis v. lunev 5 4.20% 1 20.00%
Total 119 100.00% 5 100.00%


__initcall(pcxl_dma_init);



static void *pa11_dma_alloc(struct device *dev, size_t size,
		dma_addr_t *dma_handle, gfp_t flag, unsigned long attrs)
{
	unsigned long vaddr;
	unsigned long paddr;
	int order;

	order = get_order(size);
	size = 1 << (order + PAGE_SHIFT);
	vaddr = pcxl_alloc_range(size);
	paddr = __get_free_pages(flag, order);
	flush_kernel_dcache_range(paddr, size);
	paddr = __pa(paddr);
	map_uncached_pages(vaddr, size, paddr);
	*dma_handle = (dma_addr_t) paddr;

#if 0
/* This probably isn't needed to support EISA cards.
** ISA cards will certainly only support 24-bit DMA addressing.
** Not clear if we can, want, or need to support ISA.
*/
	if (!dev || *dev->coherent_dma_mask < 0xffffffff)
                gfp |= GFP_DMA;
#endif
	return (void *)vaddr;
}

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pre-git pre-git 103 89.57% 1 14.29%
christoph hellwig christoph hellwig 3 2.61% 1 14.29%
james bottomley james bottomley 3 2.61% 1 14.29%
krzysztof kozlowski krzysztof kozlowski 2 1.74% 1 14.29%
matthew wilcox matthew wilcox 2 1.74% 1 14.29%
andrew morton andrew morton 1 0.87% 1 14.29%
al viro al viro 1 0.87% 1 14.29%
Total 115 100.00% 7 100.00%



static void pa11_dma_free(struct device *dev, size_t size, void *vaddr,
		dma_addr_t dma_handle, unsigned long attrs)
{
	int order;

	order = get_order(size);
	size = 1 << (order + PAGE_SHIFT);
	unmap_uncached_pages((unsigned long)vaddr, size);
	pcxl_free_range((unsigned long)vaddr, size);
	free_pages((unsigned long)__va(dma_handle), order);
}

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christoph hellwig christoph hellwig 3 3.70% 1 25.00%
krzysztof kozlowski krzysztof kozlowski 2 2.47% 1 25.00%
matthew wilcox matthew wilcox 2 2.47% 1 25.00%
Total 81 100.00% 4 100.00%



static dma_addr_t pa11_dma_map_page(struct device *dev, struct page *page,
		unsigned long offset, size_t size,
		enum dma_data_direction direction, unsigned long attrs)
{
	void *addr = page_address(page) + offset;
	BUG_ON(direction == DMA_NONE);

	flush_kernel_dcache_range((unsigned long) addr, size);
	return virt_to_phys(addr);
}

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christoph hellwig christoph hellwig 21 31.82% 1 20.00%
matthew wilcox matthew wilcox 4 6.06% 1 20.00%
krzysztof kozlowski krzysztof kozlowski 2 3.03% 1 20.00%
helge deller helge deller 2 3.03% 1 20.00%
Total 66 100.00% 5 100.00%



static void pa11_dma_unmap_page(struct device *dev, dma_addr_t dma_handle,
		size_t size, enum dma_data_direction direction,
		unsigned long attrs)
{
	BUG_ON(direction == DMA_NONE);

	if (direction == DMA_TO_DEVICE)
	    return;

	/*
         * For PCI_DMA_FROMDEVICE this flush is not necessary for the
         * simple map/unmap case. However, it IS necessary if if
         * pci_dma_sync_single_* has been called and the buffer reused.
         */

	flush_kernel_dcache_range((unsigned long) phys_to_virt(dma_handle), size);
	return;
}

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matthew wilcox matthew wilcox 5 9.09% 1 16.67%
christoph hellwig christoph hellwig 3 5.45% 1 16.67%
helge deller helge deller 2 3.64% 1 16.67%
krzysztof kozlowski krzysztof kozlowski 2 3.64% 1 16.67%
andrew morton andrew morton 1 1.82% 1 16.67%
Total 55 100.00% 6 100.00%



static int pa11_dma_map_sg(struct device *dev, struct scatterlist *sglist,
		int nents, enum dma_data_direction direction,
		unsigned long attrs)
{
	int i;
	struct scatterlist *sg;

	BUG_ON(direction == DMA_NONE);

	for_each_sg(sglist, sg, nents, i) {
		unsigned long vaddr = (unsigned long)sg_virt(sg);

		sg_dma_address(sg) = (dma_addr_t) virt_to_phys(vaddr);
		sg_dma_len(sg) = sg->length;
		flush_kernel_dcache_range(vaddr, sg->length);
	}
	return nents;
}

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pre-git pre-git 56 55.45% 1 12.50%
akinobu mita akinobu mita 20 19.80% 1 12.50%
matthew wilcox matthew wilcox 18 17.82% 3 37.50%
helge deller helge deller 3 2.97% 1 12.50%
christoph hellwig christoph hellwig 2 1.98% 1 12.50%
krzysztof kozlowski krzysztof kozlowski 2 1.98% 1 12.50%
Total 101 100.00% 8 100.00%



static void pa11_dma_unmap_sg(struct device *dev, struct scatterlist *sglist,
		int nents, enum dma_data_direction direction,
		unsigned long attrs)
{
	int i;
	struct scatterlist *sg;

	BUG_ON(direction == DMA_NONE);

	if (direction == DMA_TO_DEVICE)
	    return;

	/* once we do combining we'll need to use phys_to_virt(sg_dma_address(sglist)) */

	for_each_sg(sglist, sg, nents, i)
		flush_kernel_vmap_range(sg_virt(sg), sg->length);
	return;
}

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akinobu mita akinobu mita 17 23.29% 1 12.50%
matthew wilcox matthew wilcox 9 12.33% 3 37.50%
helge deller helge deller 3 4.11% 1 12.50%
christoph hellwig christoph hellwig 2 2.74% 1 12.50%
krzysztof kozlowski krzysztof kozlowski 2 2.74% 1 12.50%
Total 73 100.00% 8 100.00%



static void pa11_dma_sync_single_for_cpu(struct device *dev,
		dma_addr_t dma_handle, size_t size,
		enum dma_data_direction direction)
{
	BUG_ON(direction == DMA_NONE);

	flush_kernel_dcache_range((unsigned long) phys_to_virt(dma_handle),
			size);
}

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helge deller helge deller 3 7.14% 1 25.00%
andrew morton andrew morton 1 2.38% 1 25.00%
Total 42 100.00% 4 100.00%



static void pa11_dma_sync_single_for_device(struct device *dev,
		dma_addr_t dma_handle, size_t size,
		enum dma_data_direction direction)
{
	BUG_ON(direction == DMA_NONE);

	flush_kernel_dcache_range((unsigned long) phys_to_virt(dma_handle),
			size);
}

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andrew morton andrew morton 37 88.10% 1 33.33%
helge deller helge deller 3 7.14% 1 33.33%
pre-git pre-git 2 4.76% 1 33.33%
Total 42 100.00% 3 100.00%



static void pa11_dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sglist, int nents, enum dma_data_direction direction)
{
	int i;
	struct scatterlist *sg;

	/* once we do combining we'll need to use phys_to_virt(sg_dma_address(sglist)) */

	for_each_sg(sglist, sg, nents, i)
		flush_kernel_vmap_range(sg_virt(sg), sg->length);
}

Contributors
Person Tokens Prop Commits CommitProp
andrew morton andrew morton 35 64.81% 1 33.33%
akinobu mita akinobu mita 17 31.48% 1 33.33%
matthew wilcox matthew wilcox 2 3.70% 1 33.33%
Total 54 100.00% 3 100.00%



static void pa11_dma_sync_sg_for_device(struct device *dev, struct scatterlist *sglist, int nents, enum dma_data_direction direction)
{
	int i;
	struct scatterlist *sg;

	/* once we do combining we'll need to use phys_to_virt(sg_dma_address(sglist)) */

	for_each_sg(sglist, sg, nents, i)
		flush_kernel_vmap_range(sg_virt(sg), sg->length);
}

Contributors
Person Tokens Prop Commits CommitProp
pre-git pre-git 27 50.00% 1 16.67%
akinobu mita akinobu mita 17 31.48% 1 16.67%
matthew wilcox matthew wilcox 7 12.96% 3 50.00%
andrew morton andrew morton 3 5.56% 1 16.67%
Total 54 100.00% 6 100.00%


struct dma_map_ops pcxl_dma_ops = {
	.dma_supported =	pa11_dma_supported,
	.alloc =		pa11_dma_alloc,
	.free =			pa11_dma_free,
	.map_page =		pa11_dma_map_page,
	.unmap_page =		pa11_dma_unmap_page,
	.map_sg =		pa11_dma_map_sg,
	.unmap_sg =		pa11_dma_unmap_sg,
	.sync_single_for_cpu =	pa11_dma_sync_single_for_cpu,
	.sync_single_for_device = pa11_dma_sync_single_for_device,
	.sync_sg_for_cpu =	pa11_dma_sync_sg_for_cpu,
	.sync_sg_for_device =	pa11_dma_sync_sg_for_device,
};



static void *pcx_dma_alloc(struct device *dev, size_t size,
		dma_addr_t *dma_handle, gfp_t flag, unsigned long attrs)
{
	void *addr;

	if ((attrs & DMA_ATTR_NON_CONSISTENT) == 0)
		return NULL;

	addr = (void *)__get_free_pages(flag, get_order(size));
	if (addr)
		*dma_handle = (dma_addr_t)virt_to_phys(addr);

	return addr;
}

Contributors
Person Tokens Prop Commits CommitProp
matthew wilcox matthew wilcox 33 42.86% 1 14.29%
pre-git pre-git 13 16.88% 1 14.29%
christoph lameter christoph lameter 10 12.99% 1 14.29%
christoph hellwig christoph hellwig 9 11.69% 1 14.29%
krzysztof kozlowski krzysztof kozlowski 8 10.39% 1 14.29%
james bottomley james bottomley 3 3.90% 1 14.29%
al viro al viro 1 1.30% 1 14.29%
Total 77 100.00% 7 100.00%



static void pcx_dma_free(struct device *dev, size_t size, void *vaddr,
		dma_addr_t iova, unsigned long attrs)
{
	free_pages((unsigned long)vaddr, get_order(size));
	return;
}

Contributors
Person Tokens Prop Commits CommitProp
pre-git pre-git 16 40.00% 1 20.00%
christoph lameter christoph lameter 10 25.00% 1 20.00%
matthew wilcox matthew wilcox 9 22.50% 1 20.00%
christoph hellwig christoph hellwig 3 7.50% 1 20.00%
krzysztof kozlowski krzysztof kozlowski 2 5.00% 1 20.00%
Total 40 100.00% 5 100.00%


struct dma_map_ops pcx_dma_ops = {
	.dma_supported =	pa11_dma_supported,
	.alloc =		pcx_dma_alloc,
	.free =			pcx_dma_free,
	.map_page =		pa11_dma_map_page,
	.unmap_page =		pa11_dma_unmap_page,
	.map_sg =		pa11_dma_map_sg,
	.unmap_sg =		pa11_dma_unmap_sg,
	.sync_single_for_cpu =	pa11_dma_sync_single_for_cpu,
	.sync_single_for_device = pa11_dma_sync_single_for_device,
	.sync_sg_for_cpu =	pa11_dma_sync_sg_for_cpu,
	.sync_sg_for_device =	pa11_dma_sync_sg_for_device,
};
Overall Contributors
Person Tokens Prop Commits CommitProp
pre-git pre-git 1841 71.08% 1 3.33%
matthew wilcox matthew wilcox 182 7.03% 8 26.67%
alexey dobriyan alexey dobriyan 180 6.95% 1 3.33%
andrew morton andrew morton 94 3.63% 2 6.67%
christoph hellwig christoph hellwig 72 2.78% 1 3.33%
akinobu mita akinobu mita 71 2.74% 1 3.33%
helge deller helge deller 36 1.39% 3 10.00%
grant grundler grant grundler 36 1.39% 1 3.33%
krzysztof kozlowski krzysztof kozlowski 22 0.85% 1 3.33%
christoph lameter christoph lameter 20 0.77% 1 3.33%
james bottomley james bottomley 6 0.23% 1 3.33%
denis v. lunev denis v. lunev 5 0.19% 1 3.33%
david s. miller david s. miller 5 0.19% 1 3.33%
tejun heo tejun heo 5 0.19% 1 3.33%
john david anglin john david anglin 5 0.19% 1 3.33%
paul gortmaker paul gortmaker 3 0.12% 1 3.33%
fujita tomonori fujita tomonori 3 0.12% 1 3.33%
al viro al viro 2 0.08% 1 3.33%
linus torvalds linus torvalds 1 0.04% 1 3.33%
paul bolle paul bolle 1 0.04% 1 3.33%
Total 2590 100.00% 30 100.00%
  Directory: arch/parisc/kernel
	Person	Tokens	Prop	Commits	CommitProp
pre-git	pre-git	63	100.00%	1	100.00%
	Total	63	100.00%	1	100.00%
cregit-Linux how code gets into the kernel

Release 4.9 arch/parisc/kernel/pci-dma.c

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