On Friday 05 November 2021 14:19:46 Roman Bacik wrote: > Hi Pali, > > On Fri, Nov 5, 2021 at 2:09 PM Pali Rohár <p...@kernel.org> wrote: > > > > On Friday 05 November 2021 12:54:24 Roman Bacik wrote: > > > > > + pci_read_word16(bp->pdev, > > > > > + PCI_SUBSYSTEM_VENDOR_ID, > > > > > + &bp->subsystem_vendor); > > > > > + pci_read_word16(bp->pdev, PCI_SUBSYSTEM_ID, &bp- > > > > >subsystem_device); > > > > > + pci_read_word16(bp->pdev, PCI_COMMAND, &bp->cmd_reg); > > > > > + pci_read_byte(bp->pdev, PCICFG_ME_REGISTER, &bp->pf_num); > > > > > > > > PCICFG_ME_REGISTER looks like an error as there is no such PCI config > > > > space macro. What you are trying to read into pf_num? Currently I do not > > > > know what "pf" abbreviation could mean. > > > > > > PF stands for physical function and pf_num is the number of physical > > > functions configured. > > > The macro is defined in bnxt.h: > > > #define PCICFG_ME_REGISTER 0x98 > > > > pci_read_byte() reads from PCI(e) config space, which is standardized. > > Therefore only standard macro constants from include/pci.h should be > > used. Standard PCI config header is 64 byte long and after that is > > linked list of capabilities. Order of capabilities is not defined. > > Extended capabilities from linked list should be located by macro > > constants PCI_CAP_ID_*. > > > > So above register is part of some extended capability. Correctly it > > should be used some function to locate starting offset of that extended > > capability based on PCI_CAP_ID_* (see pci.h file for these functions) > > and then access that register as offset + PCI_* constant (which defined > > as relative to the start of extended capability). In case standard macro > > for this constant in pci.h is missing, it is a good idea to define it, > > or copy it from linux header file pci_regs.h (to have consistent naming > > of macros). > > > > Could you provide output of 'lspci -nn -vv' from linux for this card? > > Or 'pci display.b ?.?.? 0 0x1000' dump from U-Boot? > > This could help me to under what kind of register that 0x98 is. > > > > I can write this part of code, no problem, just I need to see layout of > > config space of that card. > > Here it is: > > u-boot> pci display.b ?.?.? 0 1000
Hello! '?.?.?' is placeholder for bus-device-function PCI address of card. So should replace it by correct address at which is that card. (What you have sent is dump of PCIe Root Port, probably from 0.0.0)
