PCIe driver simple framework-V1

Platform: x86 saiyang e3400

Kernel version: Linux 3.2.1 #11 SMP sun Nov 2 13:27:52 CST 2014 i686 i686 i386 GNU/Linux

Function: enumerate the following PCIe devices, where 8111 is the PCIE-PCI bridge, the uplink port is the PCIe port, and the downlink port is the PCI port.

. 0 0604: 10b5: 8111 (Rev 21)
0:04. 0 0680: 10b5: 86e1 (Rev aa)

The source code is as follows:

[email protected]:/study/driver/kobox/src/pcie_frame# cat pcie_drv.c #include <linux/kernel.h>#include <linux/module.h>#include <linux/pci.h>#include <linux/init.h>static struct pci_device_id pci_drv_ids[] = {{PCI_DEVICE(0x10b5, 0x8111), },{PCI_DEVICE(0x10b5, 0x86e1), },{0, }};MODULE_DEVICE_TABLE(pci, pci_drv_ids);static int pci_drv_probe(struct pci_dev *dev, const struct pci_device_id *d){int i;unsigned uiVal;printk("Enter [%s][%d]\n", __FUNCTION__, __LINE__);printk("\n*********************************************\n");for(i=0; i<0x40; i+=4){pci_read_config_dword(dev, i, &uiVal);printk("[addr:%03x] [hex:%08x]\n", i, uiVal);}printk("\n*********************************************\n");printk("Leave [%s][%d]\n", __FUNCTION__, __LINE__);return 0;}static void pci_drv_remove(struct pci_dev *dev){return;}static struct pci_driver pci_drv_ops = {.name = "pci_drv",.id_table = pci_drv_ids,.probe = pci_drv_probe,.remove = pci_drv_remove,};static int __init pci_drv_init(void){return pci_register_driver(&pci_drv_ops);}static void __exit pci_drv_exit(void){pci_unregister_driver(&pci_drv_ops);}module_init(pci_drv_init);module_exit(pci_drv_exit);MODULE_LICENSE("GPL");

Execution result:

[ 7539.354646] *********************************************[ 7539.354653] [addr:000] [hex:811110b5][ 7539.354659] [addr:004] [hex:00100007][ 7539.354664] [addr:008] [hex:06040021][ 7539.354669] [addr:00c] [hex:00010001][ 7539.354675] [addr:010] [hex:fddf000c][ 7539.354680] [addr:014] [hex:00000000][ 7539.354685] [addr:018] [hex:20020201][ 7539.354690] [addr:01c] [hex:2200c0c0][ 7539.354696] [addr:020] [hex:fde0fde0][ 7539.354701] [addr:024] [hex:0000fff0][ 7539.354706] [addr:028] [hex:00000000][ 7539.354711] [addr:02c] [hex:00000000][ 7539.354716] [addr:030] [hex:00000000][ 7539.354721] [addr:034] [hex:00000040][ 7539.354726] [addr:038] [hex:00000000][ 7539.354731] [addr:03c] [hex:0000010c][ 7539.354734] [ 7539.354735] *********************************************[ 7539.354738] Leave [pci_drv_probe][31][ 7539.354765] Enter [pci_drv_probe][20][ 7539.354767] [ 7539.354768] *********************************************[ 7539.354774] [addr:000] [hex:86e110b5][ 7539.354780] [addr:004] [hex:02b00007][ 7539.354785] [addr:008] [hex:068000aa][ 7539.354790] [addr:00c] [hex:00002001][ 7539.354796] [addr:010] [hex:fdeff000][ 7539.354801] [addr:014] [hex:0000ce01][ 7539.354806] [addr:018] [hex:fdec0000][ 7539.354812] [addr:01c] [hex:fdea0000][ 7539.354817] [addr:020] [hex:00000000][ 7539.354822] [addr:024] [hex:00000000][ 7539.354827] [addr:028] [hex:00000000][ 7539.354833] [addr:02c] [hex:831110b5][ 7539.354838] [addr:030] [hex:00000000][ 7539.354843] [addr:034] [hex:00000040][ 7539.354849] [addr:038] [hex:00000000][ 7539.354854] [addr:03c] [hex:0000010c][ 7539.354856] [ 7539.354857] *********************************************[ 7539.354861] Leave [pci_drv_probe][31]

For information about the bridge to lspci-VX, you can view the following information:

01:00.0 PCI bridge: PLX Technology, Inc. PEX 8111 PCI Express-to-PCI Bridge (rev 21) (prog-if 00 [Normal decode])Flags: bus master, fast devsel, latency 0Memory at fddf0000 (64-bit, prefetchable) [size=64K]Bus: primary=01, secondary=02, subordinate=02, sec-latency=32I/O behind bridge: 0000c000-0000cfffMemory behind bridge: fde00000-fdefffffCapabilities: [40] Power Management version 2Capabilities: [50] MSI: Enable- Count=1/1 Maskable- 64bit+Capabilities: [60] Express PCI/PCI-X Bridge, MSI 00Capabilities: [100] Power Budgeting <?>Kernel driver in use: pci_drv00: b5 10 11 81 07 00 10 00 21 00 04 06 01 00 01 0010: 0c 00 df fd 00 00 00 00 01 02 02 20 c0 c0 00 2220: e0 fd e0 fd f0 ff 00 00 00 00 00 00 00 00 00 0030: 00 00 00 00 40 00 00 00 00 00 00 00 0c 01 00 0002:04.0 Bridge: PLX Technology, Inc. Device 86e1 (rev aa)Subsystem: PLX Technology, Inc. Device 8311Flags: bus master, 66MHz, medium devsel, latency 32, IRQ 12Memory at fdeff000 (32-bit, non-prefetchable) [size=512]I/O ports at ce00 [size=256]Memory at fdec0000 (32-bit, non-prefetchable) [size=128K]Memory at fdea0000 (32-bit, non-prefetchable) [size=128K]Capabilities: [40] Power Management version 2Capabilities: [48] CompactPCI hot-swap <?>Capabilities: [4c] Vital Product DataKernel driver in use: pci_drv00: b5 10 e1 86 07 00 b0 02 aa 00 80 06 01 20 00 0010: 00 f0 ef fd 01 ce 00 00 00 00 ec fd 00 00 ea fd20: 00 00 00 00 00 00 00 00 00 00 00 00 b5 10 11 8330: 00 00 00 00 40 00 00 00 00 00 00 00 0c 01 00 00

As you can see, the config configuration is read from the driver, and the configuration in the config area is the same as that in lspci-VX.

PCIe driver simple framework-V1