[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: David S. Miller <davem@davemloft.net>

4 files changed, 364 insertions, 1 deletions

diff --git a/arch/sparc64/kernel/Makefile b/arch/sparc64/kernel/Makefile
index 44043390e34f..fedfd9c6729d 100644
--- a/arch/sparc64/kernel/Makefile
+++ b/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
diff --git a/arch/sparc64/kernel/pci_sun4v.c b/arch/sparc64/kernel/pci_sun4v.c
index c1a077196c57..1d61353e2644 100644
--- a/arch/sparc64/kernel/pci_sun4v.c
+++ b/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();
 }
diff --git a/arch/sparc64/kernel/pci_sun4v.h b/arch/sparc64/kernel/pci_sun4v.h
new file mode 100644
index 000000000000..d3ac7ece4b31
--- /dev/null
+++ b/arch/sparc64/kernel/pci_sun4v.h
@@ -0,0 +1,20 @@
+/* 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) */
diff --git a/arch/sparc64/kernel/pci_sun4v_asm.S b/arch/sparc64/kernel/pci_sun4v_asm.S
new file mode 100644
index 000000000000..fd2fe0edf168
--- /dev/null
+++ b/arch/sparc64/kernel/pci_sun4v_asm.S
@@ -0,0 +1,56 @@
+/* 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