pci_schizo.c

来自「优龙2410linux2.6.8内核源代码」· C语言 代码 · 共 2,074 行 · 第 1/5 页

	err_mask = (SCHIZO_PCICTRL_BUS_UNUS |
		    SCHIZO_PCICTRL_TTO_ERR |
		    SCHIZO_PCICTRL_RTRY_ERR |
		    SCHIZO_PCICTRL_SERR |
		    SCHIZO_PCICTRL_EEN);

	err_no_mask = SCHIZO_PCICTRL_DTO_ERR;

	tmp = schizo_read(p->pbm_A.pbm_regs + SCHIZO_PCI_CTRL);
	tmp |= err_mask;
	tmp &= ~err_no_mask;
	schizo_write(p->pbm_A.pbm_regs + SCHIZO_PCI_CTRL, tmp);

	tmp = schizo_read(p->pbm_B.pbm_regs + SCHIZO_PCI_CTRL);
	tmp |= err_mask;
	tmp &= ~err_no_mask;
	schizo_write(p->pbm_B.pbm_regs + SCHIZO_PCI_CTRL, tmp);

	err_mask = (SCHIZO_PCIAFSR_PMA | SCHIZO_PCIAFSR_PTA |
		    SCHIZO_PCIAFSR_PRTRY | SCHIZO_PCIAFSR_PPERR |
		    SCHIZO_PCIAFSR_PTTO |
		    SCHIZO_PCIAFSR_SMA | SCHIZO_PCIAFSR_STA |
		    SCHIZO_PCIAFSR_SRTRY | SCHIZO_PCIAFSR_SPERR |
		    SCHIZO_PCIAFSR_STTO);

	schizo_write(p->pbm_A.pbm_regs + SCHIZO_PCI_AFSR, err_mask);
	schizo_write(p->pbm_B.pbm_regs + SCHIZO_PCI_AFSR, err_mask);

	err_mask = (BUS_ERROR_BADCMD | BUS_ERROR_SNOOP_GR |
		    BUS_ERROR_SNOOP_PCI | BUS_ERROR_SNOOP_RD |
		    BUS_ERROR_SNOOP_RDS | BUS_ERROR_SNOOP_RDSA |
		    BUS_ERROR_SNOOP_OWN | BUS_ERROR_SNOOP_RDO |
		    BUS_ERROR_WDATA_PERR | BUS_ERROR_CTRL_PERR |
		    BUS_ERROR_SNOOP_ERR | BUS_ERROR_JBUS_ILL_B |
		    BUS_ERROR_JBUS_ILL_C | BUS_ERROR_RD_PERR |
		    BUS_ERROR_APERR | BUS_ERROR_UNMAP |
		    BUS_ERROR_BUSERR | BUS_ERROR_TIMEOUT);

	schizo_write(p->pbm_A.controller_regs + SCHIZO_SAFARI_ERRCTRL,
		     (SCHIZO_SAFERRCTRL_EN | err_mask));
	schizo_write(p->pbm_B.controller_regs + SCHIZO_SAFARI_ERRCTRL,
		     (SCHIZO_SAFERRCTRL_EN | err_mask));

	schizo_write(p->pbm_A.controller_regs + SCHIZO_SAFARI_IRQCTRL,
		     (SCHIZO_SAFIRQCTRL_EN | (BUS_ERROR_UNMAP)));
	schizo_write(p->pbm_B.controller_regs + SCHIZO_SAFARI_IRQCTRL,
		     (SCHIZO_SAFIRQCTRL_EN | (BUS_ERROR_UNMAP)));
}

static void __init schizo_register_error_handlers(struct pci_controller_info *p)
{
	struct pci_pbm_info *pbm;
	unsigned int irq;
	struct ino_bucket *bucket;
	u64 tmp, err_mask, err_no_mask;

	/* Build IRQs and register handlers. */
	pbm = pbm_for_ino(p, SCHIZO_UE_INO);
	irq = schizo_irq_build(pbm, NULL, (pbm->portid << 6) | SCHIZO_UE_INO);
	if (request_irq(irq, schizo_ue_intr,
			SA_SHIRQ, "SCHIZO UE", p) < 0) {
		prom_printf("%s: Cannot register UE interrupt.\n",
			    pbm->name);
		prom_halt();
	}
	bucket = __bucket(irq);
	tmp = readl(bucket->imap);
	upa_writel(tmp, (pbm->pbm_regs + schizo_imap_offset(SCHIZO_UE_INO) + 4));

	pbm = pbm_for_ino(p, SCHIZO_CE_INO);
	irq = schizo_irq_build(pbm, NULL, (pbm->portid << 6) | SCHIZO_CE_INO);
	if (request_irq(irq, schizo_ce_intr,
			SA_SHIRQ, "SCHIZO CE", p) < 0) {
		prom_printf("%s: Cannot register CE interrupt.\n",
			    pbm->name);
		prom_halt();
	}
	bucket = __bucket(irq);
	tmp = upa_readl(bucket->imap);
	upa_writel(tmp, (pbm->pbm_regs + schizo_imap_offset(SCHIZO_CE_INO) + 4));

	pbm = pbm_for_ino(p, SCHIZO_PCIERR_A_INO);
	irq = schizo_irq_build(pbm, NULL, (pbm->portid << 6) | SCHIZO_PCIERR_A_INO);
	if (request_irq(irq, schizo_pcierr_intr,
			SA_SHIRQ, "SCHIZO PCIERR", pbm) < 0) {
		prom_printf("%s: Cannot register PBM A PciERR interrupt.\n",
			    pbm->name);
		prom_halt();
	}
	bucket = __bucket(irq);
	tmp = upa_readl(bucket->imap);
	upa_writel(tmp, (pbm->pbm_regs + schizo_imap_offset(SCHIZO_PCIERR_A_INO) + 4));

	pbm = pbm_for_ino(p, SCHIZO_PCIERR_B_INO);
	irq = schizo_irq_build(pbm, NULL, (pbm->portid << 6) | SCHIZO_PCIERR_B_INO);
	if (request_irq(irq, schizo_pcierr_intr,
			SA_SHIRQ, "SCHIZO PCIERR", &p->pbm_B) < 0) {
		prom_printf("%s: Cannot register PBM B PciERR interrupt.\n",
			    pbm->name);
		prom_halt();
	}
	bucket = __bucket(irq);
	tmp = upa_readl(bucket->imap);
	upa_writel(tmp, (pbm->pbm_regs + schizo_imap_offset(SCHIZO_PCIERR_B_INO) + 4));

	pbm = pbm_for_ino(p, SCHIZO_SERR_INO);
	irq = schizo_irq_build(pbm, NULL, (pbm->portid << 6) | SCHIZO_SERR_INO);
	if (request_irq(irq, schizo_safarierr_intr,
			SA_SHIRQ, "SCHIZO SERR", p) < 0) {
		prom_printf("%s: Cannot register SafariERR interrupt.\n",
			    pbm->name);
		prom_halt();
	}
	bucket = __bucket(irq);
	tmp = upa_readl(bucket->imap);
	upa_writel(tmp, (pbm->pbm_regs + schizo_imap_offset(SCHIZO_SERR_INO) + 4));

	/* Enable UE and CE interrupts for controller. */
	schizo_write(p->pbm_A.controller_regs + SCHIZO_ECC_CTRL,
		     (SCHIZO_ECCCTRL_EE |
		      SCHIZO_ECCCTRL_UE |
		      SCHIZO_ECCCTRL_CE));

	err_mask = (SCHIZO_PCICTRL_BUS_UNUS |
		    SCHIZO_PCICTRL_ESLCK |
		    SCHIZO_PCICTRL_TTO_ERR |
		    SCHIZO_PCICTRL_RTRY_ERR |
		    SCHIZO_PCICTRL_SBH_ERR |
		    SCHIZO_PCICTRL_SERR |
		    SCHIZO_PCICTRL_SBH_INT |
		    SCHIZO_PCICTRL_EEN);

	err_no_mask = SCHIZO_PCICTRL_DTO_ERR;

	/* Enable PCI Error interrupts and clear error
	 * bits for each PBM.
	 */
	tmp = schizo_read(p->pbm_A.pbm_regs + SCHIZO_PCI_CTRL);
	tmp |= err_mask;
	tmp &= ~err_no_mask;
	schizo_write(p->pbm_A.pbm_regs + SCHIZO_PCI_CTRL, tmp);

	schizo_write(p->pbm_A.pbm_regs + SCHIZO_PCI_AFSR,
		     (SCHIZO_PCIAFSR_PMA | SCHIZO_PCIAFSR_PTA |
		      SCHIZO_PCIAFSR_PRTRY | SCHIZO_PCIAFSR_PPERR |
		      SCHIZO_PCIAFSR_PTTO | SCHIZO_PCIAFSR_PUNUS |
		      SCHIZO_PCIAFSR_SMA | SCHIZO_PCIAFSR_STA |
		      SCHIZO_PCIAFSR_SRTRY | SCHIZO_PCIAFSR_SPERR |
		      SCHIZO_PCIAFSR_STTO | SCHIZO_PCIAFSR_SUNUS));

	tmp = schizo_read(p->pbm_B.pbm_regs + SCHIZO_PCI_CTRL);
	tmp |= err_mask;
	tmp &= ~err_no_mask;
	schizo_write(p->pbm_B.pbm_regs + SCHIZO_PCI_CTRL, tmp);

	schizo_write(p->pbm_B.pbm_regs + SCHIZO_PCI_AFSR,
		     (SCHIZO_PCIAFSR_PMA | SCHIZO_PCIAFSR_PTA |
		      SCHIZO_PCIAFSR_PRTRY | SCHIZO_PCIAFSR_PPERR |
		      SCHIZO_PCIAFSR_PTTO | SCHIZO_PCIAFSR_PUNUS |
		      SCHIZO_PCIAFSR_SMA | SCHIZO_PCIAFSR_STA |
		      SCHIZO_PCIAFSR_SRTRY | SCHIZO_PCIAFSR_SPERR |
		      SCHIZO_PCIAFSR_STTO | SCHIZO_PCIAFSR_SUNUS));

	/* Make all Safari error conditions fatal except unmapped
	 * errors which we make generate interrupts.
	 */
	err_mask = (BUS_ERROR_BADCMD | BUS_ERROR_SSMDIS |
		    BUS_ERROR_BADMA | BUS_ERROR_BADMB |
		    BUS_ERROR_BADMC |
		    BUS_ERROR_CPU1PS | BUS_ERROR_CPU1PB |
		    BUS_ERROR_CPU0PS | BUS_ERROR_CPU0PB |
		    BUS_ERROR_CIQTO |
		    BUS_ERROR_LPQTO | BUS_ERROR_SFPQTO |
		    BUS_ERROR_UFPQTO | BUS_ERROR_APERR |
		    BUS_ERROR_BUSERR | BUS_ERROR_TIMEOUT |
		    BUS_ERROR_ILL);
#if 1
	/* XXX Something wrong with some Excalibur systems
	 * XXX Sun is shipping.  The behavior on a 2-cpu
	 * XXX machine is that both CPU1 parity error bits
	 * XXX are set and are immediately set again when
	 * XXX their error status bits are cleared.  Just
	 * XXX ignore them for now.  -DaveM
	 */
	err_mask &= ~(BUS_ERROR_CPU1PS | BUS_ERROR_CPU1PB |
		      BUS_ERROR_CPU0PS | BUS_ERROR_CPU0PB);
#endif

	schizo_write(p->pbm_A.controller_regs + SCHIZO_SAFARI_ERRCTRL,
		     (SCHIZO_SAFERRCTRL_EN | err_mask));

	schizo_write(p->pbm_A.controller_regs + SCHIZO_SAFARI_IRQCTRL,
		     (SCHIZO_SAFIRQCTRL_EN | (BUS_ERROR_UNMAP)));
}

static void __init pbm_config_busmastering(struct pci_pbm_info *pbm)
{
	u8 *addr;

	/* Set cache-line size to 64 bytes, this is actually
	 * a nop but I do it for completeness.
	 */
	addr = schizo_pci_config_mkaddr(pbm, pbm->pci_first_busno,
					0, PCI_CACHE_LINE_SIZE);
	pci_config_write8(addr, 64 / sizeof(u32));

	/* Set PBM latency timer to 64 PCI clocks. */
	addr = schizo_pci_config_mkaddr(pbm, pbm->pci_first_busno,
					0, PCI_LATENCY_TIMER);
	pci_config_write8(addr, 64);
}

static void __init pbm_scan_bus(struct pci_controller_info *p,
				struct pci_pbm_info *pbm)
{
	struct pcidev_cookie *cookie = kmalloc(sizeof(*cookie), GFP_KERNEL);

	if (!cookie) {
		prom_printf("%s: Critical allocation failure.\n", pbm->name);
		prom_halt();
	}

	/* All we care about is the PBM. */
	memset(cookie, 0, sizeof(*cookie));
	cookie->pbm = pbm;

	pbm->pci_bus = pci_scan_bus(pbm->pci_first_busno,
				    p->pci_ops,
				    pbm);
	pci_fixup_host_bridge_self(pbm->pci_bus);
	pbm->pci_bus->self->sysdata = cookie;

	pci_fill_in_pbm_cookies(pbm->pci_bus, pbm, pbm->prom_node);
	pci_record_assignments(pbm, pbm->pci_bus);
	pci_assign_unassigned(pbm, pbm->pci_bus);
	pci_fixup_irq(pbm, pbm->pci_bus);
	pci_determine_66mhz_disposition(pbm, pbm->pci_bus);
	pci_setup_busmastering(pbm, pbm->pci_bus);
}

static void __init __schizo_scan_bus(struct pci_controller_info *p,
				     int chip_type)
{
	if (!p->pbm_B.prom_node || !p->pbm_A.prom_node) {
		printk("PCI: Only one PCI bus module of controller found.\n");
		printk("PCI: Ignoring entire controller.\n");
		return;
	}

	pbm_config_busmastering(&p->pbm_B);
	p->pbm_B.is_66mhz_capable =
		prom_getbool(p->pbm_B.prom_node, "66mhz-capable");
	pbm_config_busmastering(&p->pbm_A);
	p->pbm_A.is_66mhz_capable =
		prom_getbool(p->pbm_A.prom_node, "66mhz-capable");
	pbm_scan_bus(p, &p->pbm_B);
	pbm_scan_bus(p, &p->pbm_A);

	/* After the PCI bus scan is complete, we can register
	 * the error interrupt handlers.
	 */
	if (chip_type == PBM_CHIP_TYPE_TOMATILLO)
		tomatillo_register_error_handlers(p);
	else
		schizo_register_error_handlers(p);
}

static void __init schizo_scan_bus(struct pci_controller_info *p)
{
	__schizo_scan_bus(p, PBM_CHIP_TYPE_SCHIZO);
}

static void __init tomatillo_scan_bus(struct pci_controller_info *p)
{
	__schizo_scan_bus(p, PBM_CHIP_TYPE_TOMATILLO);
}

static void __init schizo_base_address_update(struct pci_dev *pdev, int resource)
{
	struct pcidev_cookie *pcp = pdev->sysdata;
	struct pci_pbm_info *pbm = pcp->pbm;
	struct resource *res, *root;
	u32 reg;
	int where, size, is_64bit;

	res = &pdev->resource[resource];
	if (resource < 6) {
		where = PCI_BASE_ADDRESS_0 + (resource * 4);
	} else if (resource == PCI_ROM_RESOURCE) {
		where = pdev->rom_base_reg;
	} else {
		/* Somebody might have asked allocation of a non-standard resource */
		return;
	}

	is_64bit = 0;
	if (res->flags & IORESOURCE_IO)
		root = &pbm->io_space;
	else {
		root = &pbm->mem_space;
		if ((res->flags & PCI_BASE_ADDRESS_MEM_TYPE_MASK)
		    == PCI_BASE_ADDRESS_MEM_TYPE_64)
			is_64bit = 1;
	}

	size = res->end - res->start;
	pci_read_config_dword(pdev, where, &reg);
	reg = ((reg & size) |
	       (((u32)(res->start - root->start)) & ~size));
	if (resource == PCI_ROM_RESOURCE) {
		reg |= PCI_ROM_ADDRESS_ENABLE;
		res->flags |= PCI_ROM_ADDRESS_ENABLE;
	}
	pci_write_config_dword(pdev, where, reg);

	/* This knows that the upper 32-bits of the address
	 * must be zero.  Our PCI common layer enforces this.
	 */
	if (is_64bit)
		pci_write_config_dword(pdev, where + 4, 0);
}

static void __init schizo_resource_adjust(struct pci_dev *pdev,
					  struct resource *res,
					  struct resource *root)
{
	res->start += root->start;
	res->end += root->start;
}

/* Use ranges property to determine where PCI MEM, I/O, and Config
 * space are for this PCI bus module.
 */
static void schizo_determine_mem_io_space(struct pci_pbm_info *pbm)
{
	int i, saw_cfg, saw_mem, saw_io;

	saw_cfg = saw_mem = saw_io = 0;
	for (i = 0; i < pbm->num_pbm_ranges; i++) {
		struct linux_prom_pci_ranges *pr = &pbm->pbm_ranges[i];
		unsigned long a;
		int type;

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

		switch (type) {
		case 0:
			/* PCI config space, 16MB */
			pbm->config_space = a;
			saw_cfg = 1;
			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;

		default:
			break;
		};
	}

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

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

static void __init pbm_register_toplevel_resources(struct pci_controller_info *p,
						   struct pci_pbm_info *pbm)
{
	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);
}

#define SCHIZO_STRBUF_CONTROL		(0x02800UL)
#define SCHIZO_STRBUF_FLUSH		(0x02808UL)
#define SCHIZO_STRBUF_FSYNC		(0x02810UL)
#define SCHIZO_STRBUF_CTXFLUSH		(0x02818UL)
#define SCHIZO_STRBUF_CTXMATCH		(0x10000UL)

static void schizo_pbm_strbuf_init(struct pci_pbm_info *pbm)
{
	unsigned long base = pbm->pbm_regs;
	u64 control;

	if (pbm->chip_type == PBM_CHIP_TYPE_TOMATILLO) {