[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / alpha / kernel / pci-noop.c

/*
 *	linux/arch/alpha/kernel/pci-noop.c
 *
 * Stub PCI interfaces for Jensen-specific kernels.
 */

#include <linux/pci.h>
#include <linux/init.h>
#include <linux/bootmem.h>
#include <linux/gfp.h>
#include <linux/capability.h>
#include <linux/mm.h>
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/dma-mapping.h>
#include <linux/scatterlist.h>

#include "proto.h"


/*
 * The PCI controller list.
 */

struct pci_controller *hose_head, **hose_tail = &hose_head;
struct pci_controller *pci_isa_hose;


struct pci_controller * __init
alloc_pci_controller(void)
{
	struct pci_controller *hose;

	hose = alloc_bootmem(sizeof(*hose));

	*hose_tail = hose;
	hose_tail = &hose->next;

	return hose;
}

struct resource * __init
alloc_resource(void)
{
	struct resource *res;

	res = alloc_bootmem(sizeof(*res));

	return res;
}

asmlinkage long
sys_pciconfig_iobase(long which, unsigned long bus, unsigned long dfn)
{
	struct pci_controller *hose;

	/* from hose or from bus.devfn */
	if (which & IOBASE_FROM_HOSE) {
		for (hose = hose_head; hose; hose = hose->next) 
			if (hose->index == bus)
				break;
		if (!hose)
			return -ENODEV;
	} else {
		/* Special hook for ISA access.  */
		if (bus == 0 && dfn == 0)
			hose = pci_isa_hose;
		else
			return -ENODEV;
	}

	switch (which & ~IOBASE_FROM_HOSE) {
	case IOBASE_HOSE:
		return hose->index;
	case IOBASE_SPARSE_MEM:
		return hose->sparse_mem_base;
	case IOBASE_DENSE_MEM:
		return hose->dense_mem_base;
	case IOBASE_SPARSE_IO:
		return hose->sparse_io_base;
	case IOBASE_DENSE_IO:
		return hose->dense_io_base;
	case IOBASE_ROOT_BUS:
		return hose->bus->number;
	}

	return -EOPNOTSUPP;
}

asmlinkage long
sys_pciconfig_read(unsigned long bus, unsigned long dfn,
		   unsigned long off, unsigned long len, void *buf)
{
	if (!capable(CAP_SYS_ADMIN))
		return -EPERM;
	else
		return -ENODEV;
}

asmlinkage long
sys_pciconfig_write(unsigned long bus, unsigned long dfn,
		    unsigned long off, unsigned long len, void *buf)
{
	if (!capable(CAP_SYS_ADMIN))
		return -EPERM;
	else
		return -ENODEV;
}

static void *alpha_noop_alloc_coherent(struct device *dev, size_t size,
				       dma_addr_t *dma_handle, gfp_t gfp,
				       struct dma_attrs *attrs)
{
	void *ret;

	if (!dev || *dev->dma_mask >= 0xffffffffUL)
		gfp &= ~GFP_DMA;
	ret = (void *)__get_free_pages(gfp, get_order(size));
	if (ret) {
		memset(ret, 0, size);
		*dma_handle = virt_to_phys(ret);
	}
	return ret;
}

static void alpha_noop_free_coherent(struct device *dev, size_t size,
				     void *cpu_addr, dma_addr_t dma_addr,
				     struct dma_attrs *attrs)
{
	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;
}

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;

	for_each_sg(sgl, sg, nents, i) {
		void *va;

		BUG_ON(!sg_page(sg));
		va = sg_virt(sg);
		sg_dma_address(sg) = (dma_addr_t)virt_to_phys(va);
		sg_dma_len(sg) = sg->length;
	}

	return nents;
}

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;
}

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;
}

struct dma_map_ops alpha_noop_ops = {
	.alloc			= alpha_noop_alloc_coherent,
	.free			= 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);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/arch/alpha/kernel/pci-noop.c
	3	*
	4	* Stub PCI interfaces for Jensen-specific kernels.
	5	*/
	6
	7	#include <linux/pci.h>
	8	#include <linux/init.h>
	9	#include <linux/bootmem.h>
5a0e3ad6	10	#include <linux/gfp.h>
a9415644	11	#include <linux/capability.h>
1da177e4 LT	12	#include <linux/mm.h>
	13	#include <linux/errno.h>
	14	#include <linux/sched.h>
	15	#include <linux/dma-mapping.h>
8c8d7214	16	#include <linux/scatterlist.h>
1da177e4 LT	17
	18	#include "proto.h"
	19
	20
	21	/*
	22	* The PCI controller list.
	23	*/
	24
	25	struct pci_controller hose_head, *hose_tail = &hose_head;
	26	struct pci_controller *pci_isa_hose;
	27
	28
	29	struct pci_controller * __init
	30	alloc_pci_controller(void)
	31	{
	32	struct pci_controller *hose;
	33
	34	hose = alloc_bootmem(sizeof(*hose));
	35
	36	*hose_tail = hose;
	37	hose_tail = &hose->next;
	38
	39	return hose;
	40	}
	41
	42	struct resource * __init
	43	alloc_resource(void)
	44	{
	45	struct resource *res;
	46
	47	res = alloc_bootmem(sizeof(*res));
	48
	49	return res;
	50	}
	51
	52	asmlinkage long
	53	sys_pciconfig_iobase(long which, unsigned long bus, unsigned long dfn)
	54	{
	55	struct pci_controller *hose;
	56
	57	/* from hose or from bus.devfn */
	58	if (which & IOBASE_FROM_HOSE) {
	59	for (hose = hose_head; hose; hose = hose->next)
	60	if (hose->index == bus)
	61	break;
	62	if (!hose)
	63	return -ENODEV;
	64	} else {
	65	/* Special hook for ISA access. */
	66	if (bus == 0 && dfn == 0)
	67	hose = pci_isa_hose;
	68	else
	69	return -ENODEV;
	70	}
	71
	72	switch (which & ~IOBASE_FROM_HOSE) {
	73	case IOBASE_HOSE:
	74	return hose->index;
	75	case IOBASE_SPARSE_MEM:
	76	return hose->sparse_mem_base;
	77	case IOBASE_DENSE_MEM:
	78	return hose->dense_mem_base;
	79	case IOBASE_SPARSE_IO:
	80	return hose->sparse_io_base;
81	case IOBASE_DENSE_IO:
82	return hose->dense_io_base;
83	case IOBASE_ROOT_BUS:
84	return hose->bus->number;
85	}
86
87	return -EOPNOTSUPP;
88	}
89
90	asmlinkage long
91	sys_pciconfig_read(unsigned long bus, unsigned long dfn,
92	unsigned long off, unsigned long len, void *buf)
93	{
94	if (!capable(CAP_SYS_ADMIN))
95	return -EPERM;
96	else
97	return -ENODEV;
98	}
99
100	asmlinkage long
101	sys_pciconfig_write(unsigned long bus, unsigned long dfn,
102	unsigned long off, unsigned long len, void *buf)
103	{
104	if (!capable(CAP_SYS_ADMIN))
105	return -EPERM;
106	else
107	return -ENODEV;
108	}
109
c186caca	110	static void alpha_noop_alloc_coherent(struct device dev, size_t size,
4ce9a91f AP	111	dma_addr_t *dma_handle, gfp_t gfp,
4ce9a91f AP	112	struct dma_attrs *attrs)
1da177e4 LT	113	{
	114	void *ret;
	115
	116	if (!dev \|\| *dev->dma_mask >= 0xffffffffUL)
	117	gfp &= ~GFP_DMA;
	118	ret = (void *)__get_free_pages(gfp, get_order(size));
	119	if (ret) {
	120	memset(ret, 0, size);
fd2e2633	121	*dma_handle = virt_to_phys(ret);
1da177e4 LT	122	}
	123	return ret;
	124	}
	125
c186caca	126	static void alpha_noop_free_coherent(struct device *dev, size_t size,
4ce9a91f AP	127	void *cpu_addr, dma_addr_t dma_addr,
4ce9a91f AP	128	struct dma_attrs *attrs)
c186caca FT	129	{
	130	free_pages((unsigned long)cpu_addr, get_order(size));
	131	}
	132
	133	static dma_addr_t alpha_noop_map_page(struct device dev, struct page page,
	134	unsigned long offset, size_t size,
	135	enum dma_data_direction dir,
	136	struct dma_attrs *attrs)
	137	{
	138	return page_to_pa(page) + offset;
	139	}
1da177e4	140
c186caca FT	141	static int alpha_noop_map_sg(struct device dev, struct scatterlist sgl, int nents,
c186caca FT	142	enum dma_data_direction dir, struct dma_attrs *attrs)
1da177e4 LT	143	{
1da177e4 LT	144	int i;
8c8d7214	145	struct scatterlist *sg;
1da177e4	146
8c8d7214	147	for_each_sg(sgl, sg, nents, i) {
1da177e4 LT	148	void *va;
1da177e4 LT	149
8c8d7214 FT	150	BUG_ON(!sg_page(sg));
8c8d7214 FT	151	va = sg_virt(sg);
fd2e2633	152	sg_dma_address(sg) = (dma_addr_t)virt_to_phys(va);
8c8d7214	153	sg_dma_len(sg) = sg->length;
1da177e4 LT	154	}
	155
	156	return nents;
	157	}
	158
c186caca FT	159	static int alpha_noop_mapping_error(struct device *dev, dma_addr_t dma_addr)
	160	{
	161	return 0;
	162	}
	163
	164	static int alpha_noop_supported(struct device *dev, u64 mask)
	165	{
	166	return mask < 0x00ffffffUL ? 0 : 1;
	167	}
1da177e4	168
c186caca	169	static int alpha_noop_set_mask(struct device *dev, u64 mask)
1da177e4 LT	170	{
	171	if (!dev->dma_mask \|\| !dma_supported(dev, mask))
	172	return -EIO;
	173
	174	*dev->dma_mask = mask;
1da177e4 LT	175	return 0;
1da177e4 LT	176	}
c186caca FT	177
c186caca FT	178	struct dma_map_ops alpha_noop_ops = {
4ce9a91f AP	179	.alloc = alpha_noop_alloc_coherent,
4ce9a91f AP	180	.free = alpha_noop_free_coherent,
c186caca FT	181	.map_page = alpha_noop_map_page,
	182	.map_sg = alpha_noop_map_sg,
	183	.mapping_error = alpha_noop_mapping_error,
	184	.dma_supported = alpha_noop_supported,
	185	.set_dma_mask = alpha_noop_set_mask,
	186	};
	187
	188	struct dma_map_ops *dma_ops = &alpha_noop_ops;
	189	EXPORT_SYMBOL(dma_ops);