From 7eae642f75e0f7fbce7c37b2dfe0641ff1e9ebfd Mon Sep 17 00:00:00 2001
From: "David S. Miller" <davem@sunset.davemloft.net>
Date: Thu, 9 Feb 2006 22:20:01 -0800
Subject: [SPARC64]: Implement SUN4V PCI config space access.
Signed-off-by: David S. Miller <davem@davemloft.net>
---
arch/sparc64/kernel/pci_sun4v.c | 40 +++++++++++++++++++++++++++----
arch/sparc64/kernel/pci_sun4v.h | 9 +++++++
arch/sparc64/kernel/pci_sun4v_asm.S | 48 +++++++++++++++++++++++++++++++++++++
3 files changed, 93 insertions(+), 4 deletions(-)
(limited to 'arch')
diff --git a/arch/sparc64/kernel/pci_sun4v.c b/arch/sparc64/kernel/pci_sun4v.c
index 1d61353e26..abd9bfb245 100644
--- a/arch/sparc64/kernel/pci_sun4v.c
+++ b/arch/sparc64/kernel/pci_sun4v.c
@@ -74,15 +74,47 @@ struct pci_iommu_ops pci_sun4v_iommu_ops = {
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;
+ struct pci_pbm_info *pbm = bus_dev->sysdata;
+ unsigned long devhandle = pbm->devhandle;
+ unsigned int bus = bus_dev->number;
+ unsigned int device = PCI_SLOT(devfn);
+ unsigned int func = PCI_FUNC(devfn);
+ unsigned long ret;
+
+ ret = pci_sun4v_config_get(devhandle,
+ HV_PCI_DEVICE_BUILD(bus, device, func),
+ where, size);
+ switch (size) {
+ case 1:
+ *value = ret & 0xff;
+ break;
+ case 2:
+ *value = ret & 0xffff;
+ break;
+ case 4:
+ *value = ret & 0xffffffff;
+ break;
+ };
+
+
+ return PCIBIOS_SUCCESSFUL;
}
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;
+ struct pci_pbm_info *pbm = bus_dev->sysdata;
+ unsigned long devhandle = pbm->devhandle;
+ unsigned int bus = bus_dev->number;
+ unsigned int device = PCI_SLOT(devfn);
+ unsigned int func = PCI_FUNC(devfn);
+ unsigned long ret;
+
+ ret = pci_sun4v_config_put(devhandle,
+ HV_PCI_DEVICE_BUILD(bus, device, func),
+ where, size, value);
+
+ return PCIBIOS_SUCCESSFUL;
}
static struct pci_ops pci_sun4v_ops = {
diff --git a/arch/sparc64/kernel/pci_sun4v.h b/arch/sparc64/kernel/pci_sun4v.h
index d3ac7ece4b..5c7ed2ca15 100644
--- a/arch/sparc64/kernel/pci_sun4v.h
+++ b/arch/sparc64/kernel/pci_sun4v.h
@@ -16,5 +16,14 @@ extern unsigned long pci_sun4v_iommu_map(unsigned long devhandle,
extern unsigned long pci_sun4v_iommu_demap(unsigned long devhandle,
unsigned long tsbid,
unsigned long num_ttes);
+extern unsigned long pci_sun4v_config_get(unsigned long devhandle,
+ unsigned long pci_device,
+ unsigned long config_offset,
+ unsigned long size);
+extern int pci_sun4v_config_put(unsigned long devhandle,
+ unsigned long pci_device,
+ unsigned long config_offset,
+ unsigned long size,
+ unsigned long data);
#endif /* !(_PCI_SUN4V_H) */
diff --git a/arch/sparc64/kernel/pci_sun4v_asm.S b/arch/sparc64/kernel/pci_sun4v_asm.S
index fd2fe0edf1..2f1147146a 100644
--- a/arch/sparc64/kernel/pci_sun4v_asm.S
+++ b/arch/sparc64/kernel/pci_sun4v_asm.S
@@ -54,3 +54,51 @@ pci_sun4v_iommu_demap:
ta HV_FAST_TRAP
retl
mov %o1, %o0
+
+ /* %o0: devhandle
+ * %o1: pci_device
+ * %o2: pci_config_offset
+ * %o3: size
+ *
+ * returns %o0: data
+ *
+ * If there is an error, the data will be returned
+ * as all 1's.
+ */
+ .globl pci_sun4v_config_get
+pci_sun4v_config_get:
+ mov %o3, %o4
+ mov %o2, %o3
+ mov %o1, %o2
+ mov %o0, %o1
+ mov HV_FAST_PCI_CONFIG_GET, %o0
+ ta HV_FAST_TRAP
+ brnz,a,pn %o1, 1f
+ mov -1, %o2
+1: retl
+ mov %o2, %o0
+
+ /* %o0: devhandle
+ * %o1: pci_device
+ * %o2: pci_config_offset
+ * %o3: size
+ * %o4: data
+ *
+ * returns %o0: status
+ *
+ * status will be zero if the operation completed
+ * successfully, else -1 if not
+ */
+ .globl pci_sun4v_config_put
+pci_sun4v_config_put:
+ mov %o3, %o4
+ mov %o2, %o3
+ mov %o1, %o2
+ mov %o0, %o1
+ mov HV_FAST_PCI_CONFIG_PUT, %o0
+ ta HV_FAST_TRAP
+ brnz,a,pn %o1, 1f
+ mov -1, %o1
+1: retl
+ mov %o1, %o0
+
--
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