[SPARC64]: More SUN4V PCI controller work.

Add assembler file for PCI hypervisor calls.
Setup basic skeleton of SUN4V PCI controller driver.

Add 32-bit devhandle to PBM struct, as this is needed for
hypervisor calls.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

arch/sparc64/kernel/Makefile

@@ -14,7 +14,8 @@ obj-y		:= process.o setup.o cpu.o idprom.o \
 		   power.o sbus.o iommu_common.o sparc64_ksyms.o chmc.o
 
 obj-$(CONFIG_PCI)	 += ebus.o isa.o pci_common.o pci_iommu.o \
-			    pci_psycho.o pci_sabre.o pci_schizo.o pci_sun4v.o
+			    pci_psycho.o pci_sabre.o pci_schizo.o \
+			    pci_sun4v.o pci_sun4v_asm.o
 obj-$(CONFIG_SMP)	 += smp.o trampoline.o
 obj-$(CONFIG_SPARC32_COMPAT) += sys32.o sys_sparc32.o signal32.o
 obj-$(CONFIG_BINFMT_ELF32) += binfmt_elf32.o

arch/sparc64/kernel/pci_sun4v.c

@@ -21,6 +21,8 @@
 #include "pci_impl.h"
 #include "iommu_common.h"
 
+#include "pci_sun4v.h"
+
 static void *pci_4v_alloc_consistent(struct pci_dev *pdev, size_t size, dma_addr_t *dma_addrp)
 {
 	return NULL;
@@ -67,8 +69,292 @@ struct pci_iommu_ops pci_sun4v_iommu_ops = {
 	.dma_sync_sg_for_cpu		= pci_4v_dma_sync_sg_for_cpu,
 };
 
+/* SUN4V PCI configuration space accessors. */
+
+static int pci_sun4v_read_pci_cfg(struct pci_bus *bus_dev, unsigned int devfn,
+				  int where, int size, u32 *value)
+{
+	/* XXX Implement me! XXX */
+	return 0;
+}
+
+static int pci_sun4v_write_pci_cfg(struct pci_bus *bus_dev, unsigned int devfn,
+				   int where, int size, u32 value)
+{
+	/* XXX Implement me! XXX */
+	return 0;
+}
+
+static struct pci_ops pci_sun4v_ops = {
+	.read =		pci_sun4v_read_pci_cfg,
+	.write =	pci_sun4v_write_pci_cfg,
+};
+
+
+static void pci_sun4v_scan_bus(struct pci_controller_info *p)
+{
+	/* XXX Implement me! XXX */
+}
+
+static unsigned int pci_sun4v_irq_build(struct pci_pbm_info *pbm,
+					struct pci_dev *pdev,
+					unsigned int ino)
+{
+	/* XXX Implement me! XXX */
+	return 0;
+}
+
+/* XXX correct? XXX */
+static void pci_sun4v_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 |= IORESOURCE_ROM_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);
+}
+
+/* XXX correct? XXX */
+static void pci_sun4v_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 pci_sun4v_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 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);
+}
+
+static void pci_sun4v_iommu_init(struct pci_pbm_info *pbm)
+{
+	/* XXX Implement me! XXX */
+}
+
+static void pci_sun4v_pbm_init(struct pci_controller_info *p, int prom_node)
+{
+	struct pci_pbm_info *pbm;
+	struct linux_prom64_registers regs;
+	unsigned int busrange[2];
+	int err;
+
+	/* XXX */
+	pbm = &p->pbm_A;
+
+	pbm->parent = p;
+	pbm->prom_node = prom_node;
+	pbm->pci_first_slot = 1;
+
+	prom_getproperty(prom_node, "reg", (char *)&regs, sizeof(regs));
+	pbm->devhandle = (regs.phys_addr >> 32UL) & 0x0fffffff;
+
+	sprintf(pbm->name, "SUN4V-PCI%d PBM%c",
+		p->index, (pbm == &p->pbm_A ? 'A' : 'B'));
+
+	printk("%s: devhandle[%x]\n", pbm->name, pbm->devhandle);
+
+	prom_getstring(prom_node, "name",
+		       pbm->prom_name, sizeof(pbm->prom_name));
+
+	err = prom_getproperty(prom_node, "ranges",
+			       (char *) pbm->pbm_ranges,
+			       sizeof(pbm->pbm_ranges));
+	if (err == 0 || err == -1) {
+		prom_printf("%s: Fatal error, no ranges property.\n",
+			    pbm->name);
+		prom_halt();
+	}
+
+	pbm->num_pbm_ranges =
+		(err / sizeof(struct linux_prom_pci_ranges));
+
+	pci_sun4v_determine_mem_io_space(pbm);
+	pbm_register_toplevel_resources(p, pbm);
+
+	err = prom_getproperty(prom_node, "interrupt-map",
+			       (char *)pbm->pbm_intmap,
+			       sizeof(pbm->pbm_intmap));
+	if (err != -1) {
+		pbm->num_pbm_intmap = (err / sizeof(struct linux_prom_pci_intmap));
+		err = prom_getproperty(prom_node, "interrupt-map-mask",
+				       (char *)&pbm->pbm_intmask,
+				       sizeof(pbm->pbm_intmask));
+		if (err == -1) {
+			prom_printf("%s: Fatal error, no "
+				    "interrupt-map-mask.\n", pbm->name);
+			prom_halt();
+		}
+	} else {
+		pbm->num_pbm_intmap = 0;
+		memset(&pbm->pbm_intmask, 0, sizeof(pbm->pbm_intmask));
+	}
+
+	err = prom_getproperty(prom_node, "bus-range",
+			       (char *)&busrange[0],
+			       sizeof(busrange));
+	if (err == 0 || err == -1) {
+		prom_printf("%s: Fatal error, no bus-range.\n", pbm->name);
+		prom_halt();
+	}
+	pbm->pci_first_busno = busrange[0];
+	pbm->pci_last_busno = busrange[1];
+
+	pci_sun4v_iommu_init(pbm);
+}
+
 void sun4v_pci_init(int node, char *model_name)
 {
+	struct pci_controller_info *p;
+	struct pci_iommu *iommu;
+
+	p = kmalloc(sizeof(struct pci_controller_info), GFP_ATOMIC);
+	if (!p) {
+		prom_printf("SUN4V_PCI: Fatal memory allocation error.\n");
+		prom_halt();
+	}
+	memset(p, 0, sizeof(*p));
+
+	iommu = kmalloc(sizeof(struct pci_iommu), GFP_ATOMIC);
+	if (!iommu) {
+		prom_printf("SCHIZO: Fatal memory allocation error.\n");
+		prom_halt();
+	}
+	memset(iommu, 0, sizeof(*iommu));
+	p->pbm_A.iommu = iommu;
+
+	iommu = kmalloc(sizeof(struct pci_iommu), GFP_ATOMIC);
+	if (!iommu) {
+		prom_printf("SCHIZO: Fatal memory allocation error.\n");
+		prom_halt();
+	}
+	memset(iommu, 0, sizeof(*iommu));
+	p->pbm_B.iommu = iommu;
+
+	p->next = pci_controller_root;
+	pci_controller_root = p;
+
+	p->index = pci_num_controllers++;
+	p->pbms_same_domain = 0;
+
+	p->scan_bus = pci_sun4v_scan_bus;
+	p->irq_build = pci_sun4v_irq_build;
+	p->base_address_update = pci_sun4v_base_address_update;
+	p->resource_adjust = pci_sun4v_resource_adjust;
+	p->pci_ops = &pci_sun4v_ops;
+
+	/* Like PSYCHO and SCHIZO we have a 2GB aligned area
+	 * for memory space.
+	 */
+	pci_memspace_mask = 0x7fffffffUL;
+
+	pci_sun4v_pbm_init(p, node);
+
 	prom_printf("sun4v_pci_init: Implement me.\n");
 	prom_halt();
 }

arch/sparc64/kernel/pci_sun4v.h

+/* pci_sun4v.h: SUN4V specific PCI controller support.
+ *
+ * Copyright (C) 2006 David S. Miller (davem@davemloft.net)
+ */
+
+#ifndef _PCI_SUN4V_H
+#define _PCI_SUN4V_H
+
+extern unsigned long pci_sun4v_devino_to_sysino(unsigned long devhandle,
+						unsigned long deino);
+extern unsigned long pci_sun4v_iommu_map(unsigned long devhandle,
+					 unsigned long tsbid,
+					 unsigned long num_ttes,
+					 unsigned long io_attributes,
+					 unsigned long io_page_list_pa);
+extern unsigned long pci_sun4v_iommu_demap(unsigned long devhandle,
+					   unsigned long tsbid,
+					   unsigned long num_ttes);
+
+#endif /* !(_PCI_SUN4V_H) */

arch/sparc64/kernel/pci_sun4v_asm.S

+/* pci_sun4v_asm: Hypervisor calls for PCI support.
+ *
+ * Copyright (C) 2006 David S. Miller <davem@davemloft.net>
+ */
+
+#include <asm/hypervisor.h>
+
+	/* %o0: devhandle
+	 * %o1:	devino
+	 *
+	 * returns %o0: sysino
+	 */
+	.globl	pci_sun4v_devino_to_sysino
+pci_sun4v_devino_to_sysino:
+	mov	%o1, %o2
+	mov	%o0, %o1
+	mov	HV_FAST_INTR_DEVINO2SYSINO, %o0
+	ta	HV_FAST_TRAP
+	retl
+	 mov	%o1, %o0
+
+	/* %o0: devhandle
+	 * %o1:	tsbid
+	 * %o2:	num ttes
+	 * %o3:	io_attributes
+	 * %o4:	io_page_list phys address
+	 *
+	 * returns %o0:	num ttes mapped
+	 */
+	.globl	pci_sun4v_iommu_map
+pci_sun4v_iommu_map:
+	mov	%o4, %o5
+	mov	%o3, %o4
+	mov	%o2, %o3
+	mov	%o1, %o2
+	mov	%o0, %o1
+	mov	HV_FAST_PCI_IOMMU_MAP, %o0
+	ta	HV_FAST_TRAP
+	retl
+	 mov	%o1, %o0
+
+	/* %o0: devhandle
+	 * %o1:	tsbid
+	 * %o2:	num ttes
+	 *
+	 * returns %o0:	num ttes demapped
+	 */
+	.globl	pci_sun4v_iommu_demap
+pci_sun4v_iommu_demap:
+	mov	%o2, %o3
+	mov	%o1, %o2
+	mov	%o0, %o1
+	mov	HV_FAST_PCI_IOMMU_DEMAP, %o0
+	ta	HV_FAST_TRAP
+	retl
+	 mov	%o1, %o0

include/asm-sparc64/pbm.h

@@ -139,6 +139,9 @@ struct pci_pbm_info {
 	/* Opaque 32-bit system bus Port ID. */
 	u32				portid;
 
+	/* Opaque 32-bit handle used for hypervisor calls.  */
+	u32				devhandle;
+
 	/* Chipset version information. */
 	int				chip_type;
 #define PBM_CHIP_TYPE_SABRE		1