[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/pbm.h>
#include <asm/prom.h>
#include <asm/of_device.h>

#include "pci_impl.h"

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)
{
	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)
{
	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++) {
		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_controller_info *p,
			       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("PCI%d(PBM%c): Device [%s] saw Target Abort [%016x]\n",
			       p->index, ((pbm == &p->pbm_A) ? 'A' : 'B'),
			       pci_name(pdev), status);
		}
	}

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

void pci_scan_for_master_abort(struct pci_controller_info *p,
			       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("PCI%d(PBM%c): Device [%s] received Master Abort [%016x]\n",
			       p->index, ((pbm == &p->pbm_A) ? 'A' : 'B'),
			       pci_name(pdev), status);
		}
	}

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

void pci_scan_for_parity_error(struct pci_controller_info *p,
			       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("PCI%d(PBM%c): Device [%s] saw Parity Error [%016x]\n",
			       p->index, ((pbm == &p->pbm_A) ? 'A' : 'B'),
			       pci_name(pdev), status);
		}
	}

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