sparc64: Convert SUN4V PCI controller driver into a real driver.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 83 insertions, 40 deletions

diff --git a/arch/sparc64/kernel/pci_sun4v.c b/arch/sparc64/kernel/pci_sun4v.c
index a104c80d319d..c1e72beade2b 100644
--- a/arch/sparc64/kernel/pci_sun4v.c
+++ b/arch/sparc64/kernel/pci_sun4v.c
@@ -13,12 +13,10 @@
 #include <linux/irq.h>
 #include <linux/msi.h>
 #include <linux/log2.h>
+#include <linux/of_device.h>
 
 #include <asm/iommu.h>
 #include <asm/irq.h>
-#include <asm/upa.h>
-#include <asm/pstate.h>
-#include <asm/oplib.h>
 #include <asm/hypervisor.h>
 #include <asm/prom.h>
 
@@ -27,6 +25,9 @@
 
 #include "pci_sun4v.h"
 
+#define DRIVER_NAME     "pci_sun4v"
+#define PFX             DRIVER_NAME ": "
+
 static unsigned long vpci_major = 1;
 static unsigned long vpci_minor = 1;
 
@@ -583,7 +584,7 @@ static unsigned long __init probe_existing_entries(struct pci_pbm_info *pbm,
         return cnt;
 }
 
-static void __init pci_sun4v_iommu_init(struct pci_pbm_info *pbm)
+static int __init pci_sun4v_iommu_init(struct pci_pbm_info *pbm)
 {
         struct iommu *iommu = pbm->iommu;
         struct property *prop;
@@ -603,9 +604,9 @@ static void __init pci_sun4v_iommu_init(struct pci_pbm_info *pbm)
         }
 
         if ((vdma[0] | vdma[1]) & ~IO_PAGE_MASK) {
-                prom_printf("PCI-SUN4V: strange virtual-dma[%08x:%08x].\n",
-                            vdma[0], vdma[1]);
-                prom_halt();
+                printk(KERN_ERR PFX "Strange virtual-dma[%08x:%08x].\n",
+                       vdma[0], vdma[1]);
+                return -EINVAL;
         };
 
         dma_mask = (roundup_pow_of_two(vdma[1]) - 1UL);
@@ -625,8 +626,8 @@ static void __init pci_sun4v_iommu_init(struct pci_pbm_info *pbm)
         sz = (sz + 7UL) & ~7UL;
         iommu->arena.map = kzalloc(sz, GFP_KERNEL);
         if (!iommu->arena.map) {
-                prom_printf("PCI_IOMMU: Error, kmalloc(arena.map) failed.\n");
-                prom_halt();
+                printk(KERN_ERR PFX "Error, kmalloc(arena.map) failed.\n");
+                return -ENOMEM;
         }
         iommu->arena.limit = num_tsb_entries;
 
@@ -634,6 +635,8 @@ static void __init pci_sun4v_iommu_init(struct pci_pbm_info *pbm)
         if (sz)
                 printk("%s: Imported %lu TSB entries from OBP\n",
                        pbm->name, sz);
+
+        return 0;
 }
 
 #ifdef CONFIG_PCI_MSI
@@ -890,10 +893,11 @@ static void pci_sun4v_msi_init(struct pci_pbm_info *pbm)
 }
 #endif /* !(CONFIG_PCI_MSI) */
 
-static void __init pci_sun4v_pbm_init(struct pci_controller_info *p,
-                                      struct device_node *dp, u32 devhandle)
+static int __init pci_sun4v_pbm_init(struct pci_controller_info *p,
+                                     struct device_node *dp, u32 devhandle)
 {
         struct pci_pbm_info *pbm;
+        int err;
 
         if (devhandle & 0x40)
                 pbm = &p->pbm_B;
@@ -905,7 +909,6 @@ static void __init pci_sun4v_pbm_init(struct pci_controller_info *p,
 
         pbm->numa_node = of_node_to_nid(dp);
 
-        pbm->scan_bus = pci_sun4v_scan_bus;
         pbm->pci_ops = &sun4v_pci_ops;
         pbm->config_space_reg_bits = 12;
 
@@ -924,50 +927,58 @@ static void __init pci_sun4v_pbm_init(struct pci_controller_info *p,
         pci_determine_mem_io_space(pbm);
 
         pci_get_pbm_props(pbm);
-        pci_sun4v_iommu_init(pbm);
+
+        err = pci_sun4v_iommu_init(pbm);
+        if (err)
+                return err;
+
         pci_sun4v_msi_init(pbm);
+
+        pci_sun4v_scan_bus(pbm);
+
+        return 0;
 }
 
-void __init sun4v_pci_init(struct device_node *dp, char *model_name)
+static int __devinit pci_sun4v_probe(struct of_device *op,
+                                     const struct of_device_id *match)
 {
+        const struct linux_prom64_registers *regs;
         static int hvapi_negotiated = 0;
         struct pci_controller_info *p;
         struct pci_pbm_info *pbm;
+        struct device_node *dp;
         struct iommu *iommu;
-        struct property *prop;
-        struct linux_prom64_registers *regs;
         u32 devhandle;
         int i;
 
+        dp = op->node;
+
         if (!hvapi_negotiated++) {
                 int err = sun4v_hvapi_register(HV_GRP_PCI,
                                                vpci_major,
                                                &vpci_minor);
 
                 if (err) {
-                        prom_printf("SUN4V_PCI: Could not register hvapi, "
-                                    "err=%d\n", err);
-                        prom_halt();
+                        printk(KERN_ERR PFX "Could not register hvapi, "
+                               "err=%d\n", err);
+                        return err;
                 }
-                printk("SUN4V_PCI: Registered hvapi major[%lu] minor[%lu]\n",
+                printk(KERN_INFO PFX "Registered hvapi major[%lu] minor[%lu]\n",
                        vpci_major, vpci_minor);
 
                 dma_ops = &sun4v_dma_ops;
         }
 
-        prop = of_find_property(dp, "reg", NULL);
-        if (!prop) {
-                prom_printf("SUN4V_PCI: Could not find config registers\n");
-                prom_halt();
+        regs = of_get_property(dp, "reg", NULL);
+        if (!regs) {
+                printk(KERN_ERR PFX "Could not find config registers\n");
+                return -ENODEV;
         }
-        regs = prop->value;
-
         devhandle = (regs->phys_addr >> 32UL) & 0x0fffffff;
 
         for (pbm = pci_pbm_root; pbm; pbm = pbm->next) {
                 if (pbm->devhandle == (devhandle ^ 0x40)) {
-                        pci_sun4v_pbm_init(pbm->parent, dp, devhandle);
-                        return;
+                        return pci_sun4v_pbm_init(pbm->parent, dp, devhandle);
                 }
         }
 
@@ -975,31 +986,63 @@ void __init sun4v_pci_init(struct device_node *dp, char *model_name)
                 unsigned long page = get_zeroed_page(GFP_ATOMIC);
 
                 if (!page)
-                        goto fatal_memory_error;
+                        return -ENOMEM;
 
                 per_cpu(iommu_batch, i).pglist = (u64 *) page;
         }
 
         p = kzalloc(sizeof(struct pci_controller_info), GFP_ATOMIC);
-        if (!p)
-                goto fatal_memory_error;
+        if (!p) {
+                printk(KERN_ERR PFX "Could not allocate pci_controller_info\n");
+                goto out_free;
+        }
 
         iommu = kzalloc(sizeof(struct iommu), GFP_ATOMIC);
-        if (!iommu)
-                goto fatal_memory_error;
+        if (!iommu) {
+                printk(KERN_ERR PFX "Could not allocate pbm A iommu\n");
+                goto out_free;
+        }
 
         p->pbm_A.iommu = iommu;
 
         iommu = kzalloc(sizeof(struct iommu), GFP_ATOMIC);
-        if (!iommu)
-                goto fatal_memory_error;
+        if (!iommu) {
+                printk(KERN_ERR PFX "Could not allocate pbm B iommu\n");
+                goto out_free;
+        }
 
         p->pbm_B.iommu = iommu;
 
-        pci_sun4v_pbm_init(p, dp, devhandle);
-        return;
+        return pci_sun4v_pbm_init(p, dp, devhandle);
 
-fatal_memory_error:
-        prom_printf("SUN4V_PCI: Fatal memory allocation error.\n");
-        prom_halt();
+out_free:
+        if (p) {
+                if (p->pbm_A.iommu)
+                        kfree(p->pbm_A.iommu);
+                if (p->pbm_B.iommu)
+                        kfree(p->pbm_B.iommu);
+                kfree(p);
+        }
+        return -ENOMEM;
 }
+
+static struct of_device_id pci_sun4v_match[] = {
+        {
+                .name = "pci",
+                .compatible = "SUNW,sun4v-pci",
+        },
+        {},
+};
+
+static struct of_platform_driver pci_sun4v_driver = {
+        .name           = DRIVER_NAME,
+        .match_table    = pci_sun4v_match,
+        .probe          = pci_sun4v_probe,
+};
+
+static int __init pci_sun4v_init(void)
+{
+        return of_register_driver(&pci_sun4v_driver, &of_bus_type);
+}
+
+subsys_initcall(pci_sun4v_init);