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[Qemu-devel] [PATCH 14/25] pci: factor out the logic to get pci device f
From: |
Isaku Yamahata |
Subject: |
[Qemu-devel] [PATCH 14/25] pci: factor out the logic to get pci device from address. |
Date: |
Sat, 3 Oct 2009 05:16:06 +0900 |
factor out conversion logic from io port address into bus+dev+func
with bit shift operation and conversion bus+dev+func into pci device.
They will be used later by pcie support.
This patch also eliminates the logic duplication.
Signed-off-by: Isaku Yamahata <address@hidden>
---
hw/pci.c | 83 ++++++++++++++++++++++++++++++++++---------------------------
1 files changed, 46 insertions(+), 37 deletions(-)
diff --git a/hw/pci.c b/hw/pci.c
index 223d36a..80620ca 100644
--- a/hw/pci.c
+++ b/hw/pci.c
@@ -609,44 +609,25 @@ void pci_default_write_config(PCIDevice *d, uint32_t
addr, uint32_t val, int l)
pci_update_mappings(d);
}
-void pci_data_write(void *opaque, uint32_t addr, uint32_t val, int len)
+static void pci_data_write_common(PCIDevice *pci_dev,
+ uint32_t config_addr, uint32_t val, int len)
{
- PCIBus *s = opaque;
- PCIDevice *pci_dev;
- int config_addr, bus_num;
-
-#if 0
- PCI_DPRINTF("pci_data_write: addr=%08"PRIx32" val=%08"PRIx32" len=%d\n",
- addr, val, len);
-#endif
- bus_num = (addr >> 16) & 0xff;
- s = pci_find_bus(s, bus_num);
- if (!s)
- return;
- pci_dev = s->devices[(addr >> 8) & 0xff];
+ assert(len == 1 || len == 2 || len == 4);
if (!pci_dev)
return;
- config_addr = addr & 0xff;
- PCI_DPRINTF("pci_config_write: %s: "
- "addr=%02x val=%08"PRI32x" len=%d\n",
- pci_dev->name, config_addr, val, len);
+
+ PCI_DPRINTF("%s: %s: addr=%02"PRIx32" val=%08"PRI32x" len=%d\n",
+ __func__, pci_dev->name, config_addr, val, len);
pci_dev->config_write(pci_dev, config_addr, val, len);
}
-uint32_t pci_data_read(void *opaque, uint32_t addr, int len)
+static uint32_t pci_data_read_common(PCIDevice *pci_dev,
+ uint32_t config_addr, int len)
{
- PCIBus *s = opaque;
- PCIDevice *pci_dev;
- int config_addr, bus_num;
uint32_t val;
- bus_num = (addr >> 16) & 0xff;
- s = pci_find_bus(s, bus_num);
- if (!s)
- goto fail;
- pci_dev = s->devices[(addr >> 8) & 0xff];
+ assert(len == 1 || len == 2 || len == 4);
if (!pci_dev) {
- fail:
switch(len) {
case 1:
val = 0xff;
@@ -659,21 +640,49 @@ uint32_t pci_data_read(void *opaque, uint32_t addr, int
len)
val = 0xffffffff;
break;
}
- goto the_end;
+ } else {
+ val = pci_dev->config_read(pci_dev, config_addr, len);
+ PCI_DPRINTF("%s: %s: addr=%02"PRIx32" val=%08"PRIx32" len=%d\n",
+ __func__, pci_dev->name, config_addr, val, len);
}
- config_addr = addr & 0xff;
- val = pci_dev->config_read(pci_dev, config_addr, len);
- PCI_DPRINTF("pci_config_read: %s: "
- "addr=%02x val=%08"PRIx32" len=%d\n",
- pci_dev->name, config_addr, val, len);
- the_end:
+
#if 0
- PCI_DPRINTF("pci_data_read: addr=%08"PRIx32" val=%08"PRIx32" len=%d\n",
- addr, val, len);
+ PCI_DPRINTF("%s: addr=%08"PRIx32" val=%08"PRIx32" len=%d\n",
+ __func__, addr, val, len);
#endif
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 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;
+#if 0
+ PCI_DPRINTF("pci_data_write: addr=%08"PRIx32" val=%08"PRIx32" len=%d\n",
+ addr, val, len);
+#endif
+
+ pci_data_write_common(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_data_read_common(pci_addr_to_dev(s, addr),
+ pci_addr_to_config(addr), len);
+}
/***********************************************************/
/* generic PCI irq support */
--
1.6.0.2
- [Qemu-devel] [PATCH 12/25] pci: 64bit bar support., (continued)
[Qemu-devel] [PATCH 08/25] pci: use helper functions to access pci config space., Isaku Yamahata, 2009/10/02
[Qemu-devel] [PATCH 10/25] pci: introduce FMT_pcibus for printf format for pcibus_t., Isaku Yamahata, 2009/10/02
[Qemu-devel] [PATCH 14/25] pci: factor out the logic to get pci device from address.,
Isaku Yamahata <=
[Qemu-devel] [PATCH 25/25] pci/monitor: print out bridge's filtering values and so on., Isaku Yamahata, 2009/10/02
[Qemu-devel] [PATCH 04/25] pci: use the symbolic constant, PCI_ROM_ADDRESS_ENABLE instead of 1., Isaku Yamahata, 2009/10/02
[Qemu-devel] [PATCH 15/25] pci_host.h: split non-inline static function in pci_host.h into pci_host.c, Isaku Yamahata, 2009/10/02
[Qemu-devel] [PATCH 20/25] pci: factor out config update logic., Isaku Yamahata, 2009/10/02
[Qemu-devel] [PATCH 18/25] pci: add helper functions for pci config write function., Isaku Yamahata, 2009/10/02
[Qemu-devel] [PATCH 09/25] pci: introduce pcibus_t to represent pci bus address/size instead of uint32_t, Isaku Yamahata, 2009/10/02