[deliverable/linux.git] / arch / sparc64 / kernel / pci_common.c

/* pci_common.c: PCI controller common support.
 *
 * Copyright (C) 1999, 2007 David S. Miller (davem@davemloft.net)
 */

#include <linux/string.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/device.h>

#include <asm/prom.h>
#include <asm/of_device.h>
#include <asm/oplib.h>

#include "pci_impl.h"

void pci_get_pbm_props(struct pci_pbm_info *pbm)
{
	const u32 *val = of_get_property(pbm->prom_node, "bus-range", NULL);

	pbm->pci_first_busno = val[0];
	pbm->pci_last_busno = val[1];

	val = of_get_property(pbm->prom_node, "ino-bitmap", NULL);
	if (val) {
		pbm->ino_bitmap = (((u64)val[1] << 32UL) |
				   ((u64)val[0] <<  0UL));
	}
}

static void pci_register_legacy_regions(struct resource *io_res,
					struct resource *mem_res)
{
	struct resource *p;

	/* VGA Video RAM. */
	p = kzalloc(sizeof(*p), GFP_KERNEL);
	if (!p)
		return;

	p->name = "Video RAM area";
	p->start = mem_res->start + 0xa0000UL;
	p->end = p->start + 0x1ffffUL;
	p->flags = IORESOURCE_BUSY;
	request_resource(mem_res, p);

	p = kzalloc(sizeof(*p), GFP_KERNEL);
	if (!p)
		return;

	p->name = "System ROM";
	p->start = mem_res->start + 0xf0000UL;
	p->end = p->start + 0xffffUL;
	p->flags = IORESOURCE_BUSY;
	request_resource(mem_res, p);

	p = kzalloc(sizeof(*p), GFP_KERNEL);
	if (!p)
		return;

	p->name = "Video ROM";
	p->start = mem_res->start + 0xc0000UL;
	p->end = p->start + 0x7fffUL;
	p->flags = IORESOURCE_BUSY;
	request_resource(mem_res, p);
}

static void pci_register_iommu_region(struct pci_pbm_info *pbm)
{
	const u32 *vdma = of_get_property(pbm->prom_node, "virtual-dma", NULL);

	if (vdma) {
		struct resource *rp = kmalloc(sizeof(*rp), GFP_KERNEL);

		if (!rp) {
			prom_printf("Cannot allocate IOMMU resource.\n");
			prom_halt();
		}
		rp->name = "IOMMU";
		rp->start = pbm->mem_space.start + (unsigned long) vdma[0];
		rp->end = rp->start + (unsigned long) vdma[1] - 1UL;
		rp->flags = IORESOURCE_BUSY;
		request_resource(&pbm->mem_space, rp);
	}
}

void pci_determine_mem_io_space(struct pci_pbm_info *pbm)
{
	const struct linux_prom_pci_ranges *pbm_ranges;
	int i, saw_mem, saw_io;
	int num_pbm_ranges;

	saw_mem = saw_io = 0;
	pbm_ranges = of_get_property(pbm->prom_node, "ranges", &i);
	num_pbm_ranges = i / sizeof(*pbm_ranges);

	for (i = 0; i < num_pbm_ranges; i++) {
		const struct linux_prom_pci_ranges *pr = &pbm_ranges[i];
		unsigned long a;
		u32 parent_phys_hi, parent_phys_lo;
		int type;

		parent_phys_hi = pr->parent_phys_hi;
		parent_phys_lo = pr->parent_phys_lo;
		if (tlb_type == hypervisor)
			parent_phys_hi &= 0x0fffffff;

		type = (pr->child_phys_hi >> 24) & 0x3;
		a = (((unsigned long)parent_phys_hi << 32UL) |
		     ((unsigned long)parent_phys_lo  <<  0UL));

		switch (type) {
		case 0:
			/* PCI config space, 16MB */
			pbm->config_space = a;
			break;

		case 1:
			/* 16-bit IO space, 16MB */
			pbm->io_space.start = a;
			pbm->io_space.end = a + ((16UL*1024UL*1024UL) - 1UL);
			pbm->io_space.flags = IORESOURCE_IO;
			saw_io = 1;
			break;

		case 2:
			/* 32-bit MEM space, 2GB */
			pbm->mem_space.start = a;
			pbm->mem_space.end = a + (0x80000000UL - 1UL);
			pbm->mem_space.flags = IORESOURCE_MEM;
			saw_mem = 1;
			break;

		case 3:
			/* XXX 64-bit MEM handling XXX */

		default:
			break;
		};
	}

	if (!saw_io || !saw_mem) {
		prom_printf("%s: Fatal error, missing %s PBM range.\n",
			    pbm->name,
			    (!saw_io ? "IO" : "MEM"));
		prom_halt();
	}

	printk("%s: PCI IO[%lx] MEM[%lx]\n",
	       pbm->name,
	       pbm->io_space.start,
	       pbm->mem_space.start);

	pbm->io_space.name = pbm->mem_space.name = pbm->name;

	request_resource(&ioport_resource, &pbm->io_space);
	request_resource(&iomem_resource, &pbm->mem_space);

	pci_register_legacy_regions(&pbm->io_space,
				    &pbm->mem_space);
	pci_register_iommu_region(pbm);
}

/* Generic helper routines for PCI error reporting. */
void pci_scan_for_target_abort(struct pci_pbm_info *pbm,
			       struct pci_bus *pbus)
{
	struct pci_dev *pdev;
	struct pci_bus *bus;

	list_for_each_entry(pdev, &pbus->devices, bus_list) {
		u16 status, error_bits;

		pci_read_config_word(pdev, PCI_STATUS, &status);
		error_bits =
			(status & (PCI_STATUS_SIG_TARGET_ABORT |
				   PCI_STATUS_REC_TARGET_ABORT));
		if (error_bits) {
			pci_write_config_word(pdev, PCI_STATUS, error_bits);
			printk("%s: Device %s saw Target Abort [%016x]\n",
			       pbm->name, pci_name(pdev), status);
		}
	}

	list_for_each_entry(bus, &pbus->children, node)
		pci_scan_for_target_abort(pbm, bus);
}

void pci_scan_for_master_abort(struct pci_pbm_info *pbm,
			       struct pci_bus *pbus)
{
	struct pci_dev *pdev;
	struct pci_bus *bus;

	list_for_each_entry(pdev, &pbus->devices, bus_list) {
		u16 status, error_bits;

		pci_read_config_word(pdev, PCI_STATUS, &status);
		error_bits =
			(status & (PCI_STATUS_REC_MASTER_ABORT));
		if (error_bits) {
			pci_write_config_word(pdev, PCI_STATUS, error_bits);
			printk("%s: Device %s received Master Abort [%016x]\n",
			       pbm->name, pci_name(pdev), status);
		}
	}

	list_for_each_entry(bus, &pbus->children, node)
		pci_scan_for_master_abort(pbm, bus);
}

void pci_scan_for_parity_error(struct pci_pbm_info *pbm,
			       struct pci_bus *pbus)
{
	struct pci_dev *pdev;
	struct pci_bus *bus;

	list_for_each_entry(pdev, &pbus->devices, bus_list) {
		u16 status, error_bits;

		pci_read_config_word(pdev, PCI_STATUS, &status);
		error_bits =
			(status & (PCI_STATUS_PARITY |
				   PCI_STATUS_DETECTED_PARITY));
		if (error_bits) {
			pci_write_config_word(pdev, PCI_STATUS, error_bits);
			printk("%s: Device %s saw Parity Error [%016x]\n",
			       pbm->name, pci_name(pdev), status);
		}
	}

	list_for_each_entry(bus, &pbus->children, node)
		pci_scan_for_parity_error(pbm, bus);
}
Commit	Line	Data
9fd8b647	1	/* pci_common.c: PCI controller common support.
1da177e4	2	*
9fd8b647	3	* Copyright (C) 1999, 2007 David S. Miller (davem@davemloft.net)
1da177e4 LT	4	*/
	5
	6	#include <linux/string.h>
	7	#include <linux/slab.h>
	8	#include <linux/init.h>
cf69eab2 FMDN	9	#include <linux/pci.h>
cf69eab2 FMDN	10	#include <linux/device.h>
1da177e4	11
de8d28b1	12	#include <asm/prom.h>
2b1e5978	13	#include <asm/of_device.h>
c57c2ffb	14	#include <asm/oplib.h>
de8d28b1 DM	15
de8d28b1 DM	16	#include "pci_impl.h"
1da177e4	17
cfa0652c DM	18	void pci_get_pbm_props(struct pci_pbm_info *pbm)
	19	{
	20	const u32 *val = of_get_property(pbm->prom_node, "bus-range", NULL);
	21
	22	pbm->pci_first_busno = val[0];
	23	pbm->pci_last_busno = val[1];
	24
	25	val = of_get_property(pbm->prom_node, "ino-bitmap", NULL);
	26	if (val) {
	27	pbm->ino_bitmap = (((u64)val[1] << 32UL) \|
	28	((u64)val[0] << 0UL));
	29	}
	30	}
	31
9fd8b647 DM	32	static void pci_register_legacy_regions(struct resource *io_res,
9fd8b647 DM	33	struct resource *mem_res)
1da177e4 LT	34	{
	35	struct resource *p;
	36
	37	/* VGA Video RAM. */
9132983a	38	p = kzalloc(sizeof(*p), GFP_KERNEL);
1da177e4 LT	39	if (!p)
	40	return;
	41
1da177e4 LT	42	p->name = "Video RAM area";
	43	p->start = mem_res->start + 0xa0000UL;
	44	p->end = p->start + 0x1ffffUL;
	45	p->flags = IORESOURCE_BUSY;
	46	request_resource(mem_res, p);
	47
9132983a	48	p = kzalloc(sizeof(*p), GFP_KERNEL);
1da177e4 LT	49	if (!p)
	50	return;
	51
1da177e4 LT	52	p->name = "System ROM";
	53	p->start = mem_res->start + 0xf0000UL;
	54	p->end = p->start + 0xffffUL;
	55	p->flags = IORESOURCE_BUSY;
	56	request_resource(mem_res, p);
	57
9132983a	58	p = kzalloc(sizeof(*p), GFP_KERNEL);
1da177e4 LT	59	if (!p)
	60	return;
	61
1da177e4 LT	62	p->name = "Video ROM";
	63	p->start = mem_res->start + 0xc0000UL;
	64	p->end = p->start + 0x7fffUL;
	65	p->flags = IORESOURCE_BUSY;
	66	request_resource(mem_res, p);
	67	}
	68
9fd8b647 DM	69	static void pci_register_iommu_region(struct pci_pbm_info *pbm)
9fd8b647 DM	70	{
a165b420	71	const u32 *vdma = of_get_property(pbm->prom_node, "virtual-dma", NULL);
9fd8b647 DM	72
	73	if (vdma) {
	74	struct resource rp = kmalloc(sizeof(rp), GFP_KERNEL);
	75
	76	if (!rp) {
	77	prom_printf("Cannot allocate IOMMU resource.\n");
	78	prom_halt();
	79	}
	80	rp->name = "IOMMU";
	81	rp->start = pbm->mem_space.start + (unsigned long) vdma[0];
	82	rp->end = rp->start + (unsigned long) vdma[1] - 1UL;
	83	rp->flags = IORESOURCE_BUSY;
	84	request_resource(&pbm->mem_space, rp);
	85	}
	86	}
	87
	88	void pci_determine_mem_io_space(struct pci_pbm_info *pbm)
	89	{
a165b420	90	const struct linux_prom_pci_ranges *pbm_ranges;
9fd8b647	91	int i, saw_mem, saw_io;
3487a1f9	92	int num_pbm_ranges;
9fd8b647 DM	93
9fd8b647 DM	94	saw_mem = saw_io = 0;
3487a1f9 DM	95	pbm_ranges = of_get_property(pbm->prom_node, "ranges", &i);
	96	num_pbm_ranges = i / sizeof(*pbm_ranges);
	97
	98	for (i = 0; i < num_pbm_ranges; i++) {
a165b420	99	const struct linux_prom_pci_ranges *pr = &pbm_ranges[i];
9fd8b647	100	unsigned long a;
3487a1f9	101	u32 parent_phys_hi, parent_phys_lo;
9fd8b647 DM	102	int type;
9fd8b647 DM	103
3487a1f9 DM	104	parent_phys_hi = pr->parent_phys_hi;
	105	parent_phys_lo = pr->parent_phys_lo;
	106	if (tlb_type == hypervisor)
	107	parent_phys_hi &= 0x0fffffff;
	108
9fd8b647	109	type = (pr->child_phys_hi >> 24) & 0x3;
3487a1f9 DM	110	a = (((unsigned long)parent_phys_hi << 32UL) \|
3487a1f9 DM	111	((unsigned long)parent_phys_lo << 0UL));
9fd8b647 DM	112
	113	switch (type) {
	114	case 0:
	115	/* PCI config space, 16MB */
	116	pbm->config_space = a;
	117	break;
	118
	119	case 1:
	120	/* 16-bit IO space, 16MB */
	121	pbm->io_space.start = a;
	122	pbm->io_space.end = a + ((16UL1024UL1024UL) - 1UL);
	123	pbm->io_space.flags = IORESOURCE_IO;
	124	saw_io = 1;
	125	break;
	126
	127	case 2:
	128	/* 32-bit MEM space, 2GB */
	129	pbm->mem_space.start = a;
	130	pbm->mem_space.end = a + (0x80000000UL - 1UL);
	131	pbm->mem_space.flags = IORESOURCE_MEM;
	132	saw_mem = 1;
	133	break;
	134
	135	case 3:
	136	/* XXX 64-bit MEM handling XXX */
	137
	138	default:
	139	break;
	140	};
	141	}
	142
	143	if (!saw_io \|\| !saw_mem) {
	144	prom_printf("%s: Fatal error, missing %s PBM range.\n",
	145	pbm->name,
	146	(!saw_io ? "IO" : "MEM"));
	147	prom_halt();
	148	}
	149
	150	printk("%s: PCI IO[%lx] MEM[%lx]\n",
	151	pbm->name,
	152	pbm->io_space.start,
	153	pbm->mem_space.start);
	154
	155	pbm->io_space.name = pbm->mem_space.name = pbm->name;
	156
	157	request_resource(&ioport_resource, &pbm->io_space);
	158	request_resource(&iomem_resource, &pbm->mem_space);
	159
	160	pci_register_legacy_regions(&pbm->io_space,
	161	&pbm->mem_space);
	162	pci_register_iommu_region(pbm);
	163	}
	164
1da177e4	165	/* Generic helper routines for PCI error reporting. */
6c108f12	166	void pci_scan_for_target_abort(struct pci_pbm_info *pbm,
1da177e4 LT	167	struct pci_bus *pbus)
	168	{
	169	struct pci_dev *pdev;
	170	struct pci_bus *bus;
	171
	172	list_for_each_entry(pdev, &pbus->devices, bus_list) {
	173	u16 status, error_bits;
	174
	175	pci_read_config_word(pdev, PCI_STATUS, &status);
	176	error_bits =
	177	(status & (PCI_STATUS_SIG_TARGET_ABORT \|
	178	PCI_STATUS_REC_TARGET_ABORT));
	179	if (error_bits) {
	180	pci_write_config_word(pdev, PCI_STATUS, error_bits);
6c108f12 DM	181	printk("%s: Device %s saw Target Abort [%016x]\n",
6c108f12 DM	182	pbm->name, pci_name(pdev), status);
1da177e4 LT	183	}
	184	}
	185
	186	list_for_each_entry(bus, &pbus->children, node)
6c108f12	187	pci_scan_for_target_abort(pbm, bus);
1da177e4 LT	188	}
1da177e4 LT	189
6c108f12	190	void pci_scan_for_master_abort(struct pci_pbm_info *pbm,
1da177e4 LT	191	struct pci_bus *pbus)
	192	{
	193	struct pci_dev *pdev;
	194	struct pci_bus *bus;
	195
	196	list_for_each_entry(pdev, &pbus->devices, bus_list) {
	197	u16 status, error_bits;
	198
	199	pci_read_config_word(pdev, PCI_STATUS, &status);
	200	error_bits =
	201	(status & (PCI_STATUS_REC_MASTER_ABORT));
	202	if (error_bits) {
	203	pci_write_config_word(pdev, PCI_STATUS, error_bits);
6c108f12 DM	204	printk("%s: Device %s received Master Abort [%016x]\n",
6c108f12 DM	205	pbm->name, pci_name(pdev), status);
1da177e4 LT	206	}
	207	}
	208
	209	list_for_each_entry(bus, &pbus->children, node)
6c108f12	210	pci_scan_for_master_abort(pbm, bus);
1da177e4 LT	211	}
1da177e4 LT	212
6c108f12	213	void pci_scan_for_parity_error(struct pci_pbm_info *pbm,
1da177e4 LT	214	struct pci_bus *pbus)
	215	{
	216	struct pci_dev *pdev;
	217	struct pci_bus *bus;
	218
	219	list_for_each_entry(pdev, &pbus->devices, bus_list) {
	220	u16 status, error_bits;
	221
	222	pci_read_config_word(pdev, PCI_STATUS, &status);
	223	error_bits =
	224	(status & (PCI_STATUS_PARITY \|
	225	PCI_STATUS_DETECTED_PARITY));
	226	if (error_bits) {
	227	pci_write_config_word(pdev, PCI_STATUS, error_bits);
6c108f12 DM	228	printk("%s: Device %s saw Parity Error [%016x]\n",
6c108f12 DM	229	pbm->name, pci_name(pdev), status);
1da177e4 LT	230	}
	231	}
	232
	233	list_for_each_entry(bus, &pbus->children, node)
6c108f12	234	pci_scan_for_parity_error(pbm, bus);
1da177e4	235	}