[Qemu-devel] [PATCH V5 20/29] pci: move pci host stuff from pci.c to pci_host.c

[Isaku Yamahata]

Move pci host stuff from pci.c to pci_host.c.
And add some comments.
Later pcie host bridge functions will be defined in pcie_host.c
not to bloat pci.c.

Signed-off-by: Isaku Yamahata <address@hidden>
---
 hw/pci.c      |   34 ++++------------------------------
 hw/pci.h      |    4 ++++
 hw/pci_host.c |   34 ++++++++++++++++++++++++++++++++++
 3 files changed, 42 insertions(+), 30 deletions(-)

diff --git a/hw/pci.c b/hw/pci.c
index d472b58..99b420f 100644
--- a/hw/pci.c
+++ b/hw/pci.c
@@ -654,8 +654,8 @@ void pci_default_write_config(PCIDevice *d, uint32_t addr, 
uint32_t val, int l)
         pci_update_mappings(d);
 }
 
-static void pci_dev_write_config(PCIDevice *pci_dev,
-                                 uint32_t config_addr, uint32_t val, int len)
+void pci_dev_write_config(PCIDevice *pci_dev,
+                          uint32_t config_addr, uint32_t val, int len)
 {
     assert(len == 1 || len == 2 || len == 4);
     if (!pci_dev)
@@ -666,8 +666,8 @@ static void pci_dev_write_config(PCIDevice *pci_dev,
     pci_dev->config_write(pci_dev, config_addr, val, len);
 }
 
-static uint32_t pci_dev_read_config(PCIDevice *pci_dev,
-                                    uint32_t config_addr, int len)
+uint32_t pci_dev_read_config(PCIDevice *pci_dev,
+                             uint32_t config_addr, int len)
 {
     uint32_t val;
 
@@ -693,32 +693,6 @@ static uint32_t pci_dev_read_config(PCIDevice *pci_dev,
     return val;
 }
 
-static inline PCIDevice *pci_addr_to_dev(PCIBus *bus, uint32_t addr)
-{
-    uint8_t bus_num = (addr >> 16) & 0xff;
-    uint8_t devfn = (addr >> 8) & 0xff;
-    return pci_find_device(bus, bus_num, PCI_SLOT(devfn), PCI_FUNC(devfn));
-}
-
-static inline int pci_addr_to_config(uint32_t addr)
-{
-    return addr & 0xff;
-}
-
-void pci_data_write(void *opaque, uint32_t addr, uint32_t val, int len)
-{
-    PCIBus *s = opaque;
-    pci_dev_write_config(pci_addr_to_dev(s, addr), pci_addr_to_config(addr),
-                         val, len);
-}
-
-uint32_t pci_data_read(void *opaque, uint32_t addr, int len)
-{
-    PCIBus *s = opaque;
-    return pci_dev_read_config(pci_addr_to_dev(s, addr),
-                               pci_addr_to_config(addr), len);
-}
-
 /***********************************************************/
 /* generic PCI irq support */
 
diff --git a/hw/pci.h b/hw/pci.h
index 3a3838d..7711ed4 100644
--- a/hw/pci.h
+++ b/hw/pci.h
@@ -268,6 +268,10 @@ PCIDevice *pci_nic_init(NICInfo *nd, const char 
*default_model,
                         const char *default_devaddr);
 PCIDevice *pci_nic_init_nofail(NICInfo *nd, const char *default_model,
                                const char *default_devaddr);
+void pci_dev_write_config(PCIDevice *pci_dev,
+                          uint32_t config_addr, uint32_t val, int len);
+uint32_t pci_dev_read_config(PCIDevice *pci_dev,
+                             uint32_t config_addr, int len);
 void pci_data_write(void *opaque, uint32_t addr, uint32_t val, int len);
 uint32_t pci_data_read(void *opaque, uint32_t addr, int len);
 int pci_bus_num(PCIBus *s);
diff --git a/hw/pci_host.c b/hw/pci_host.c
index 99416c8..d827b06 100644
--- a/hw/pci_host.c
+++ b/hw/pci_host.c
@@ -32,6 +32,40 @@ do { printf("pci_host_data: " fmt , ## __VA_ARGS__); } while 
(0)
 #define PCI_DPRINTF(fmt, ...)
 #endif
 
+/*
+ * PCI address
+ * bit 16 - 24: bus number
+ * bit  8 - 15: devfun number
+ * bit  0 -  7: offset in configuration space of a given pci device
+ */
+
+/* the helper functio to get a PCIDeice* for a given pci address */
+static inline PCIDevice *pci_addr_to_dev(PCIBus *bus, uint32_t addr)
+{
+    uint8_t bus_num = (addr >> 16) & 0xff;
+    uint8_t devfn = (addr >> 8) & 0xff;
+    return pci_find_device(bus, bus_num, PCI_SLOT(devfn), PCI_FUNC(devfn));
+}
+
+static inline uint32_t pci_addr_to_config(uint32_t addr)
+{
+    return addr & 0xff;
+}
+
+void pci_data_write(void *opaque, uint32_t addr, uint32_t val, int len)
+{
+    PCIBus *s = opaque;
+    pci_dev_write_config(pci_addr_to_dev(s, addr), pci_addr_to_config(addr),
+                         val, len);
+}
+
+uint32_t pci_data_read(void *opaque, uint32_t addr, int len)
+{
+    PCIBus *s = opaque;
+    return pci_dev_read_config(pci_addr_to_dev(s, addr),
+                               pci_addr_to_config(addr), len);
+}
+
 static void pci_host_config_writel(void *opaque, target_phys_addr_t addr,
                                    uint32_t val)
 {
-- 
1.6.0.2