On Tue, Jan 30, 2024 at 07:45:26PM -0500, Frank Li wrote: > From: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx> > > Add "Message Routing" and "INTx Mechanism Messages" macros to enable > a PCIe driver to send messages for INTx Interrupt Signaling. > > The "Message Routing" is from Table 2-17, and the "INTx Mechanism > Messages" is from Table 2-18 on the PCI Express Base Specification, > Rev. 4.0 Version 1.0. Please cite a newer spec revision, e.g., PCIe r6.0 or r6.1. Also, please cite section numbers instead of table numbers because the table numbers are hard to find (you can't navigate to them from "Contents") and they change a lot between spec revisions. "INTx Mechanism Messages" is Table 2-21 in r6.0, but it's in sec 2.2.8.1 in both r4.0 and r6.0. > Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx> > Reviewed-by: Serge Semin <fancer.lancer@xxxxxxxxx> > Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx> > Signed-off-by: Frank Li <Frank.Li@xxxxxxx> With these updates: Acked-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx> > --- > drivers/pci/pci.h | 18 ++++++++++++++++++ > 1 file changed, 18 insertions(+) > > diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h > index 2336a8d1edab2..fe42f5d10b010 100644 > --- a/drivers/pci/pci.h > +++ b/drivers/pci/pci.h > @@ -22,6 +22,24 @@ > */ > #define PCIE_PME_TO_L2_TIMEOUT_US 10000 > > +/* Message Routing (r[2:0]) */ Add citation to the comment: "PCIe r6.0, sec 2.2.8" > +#define PCI_MSG_TYPE_R_RC 0 I think I would prefix all these with "PCIE" instead of "PCI", since they are specific to PCIe and we already use "PCIE" for some of the PCIe-specific timeouts. > +#define PCI_MSG_TYPE_R_ADDR 1 > +#define PCI_MSG_TYPE_R_ID 2 > +#define PCI_MSG_TYPE_R_BC 3 > +#define PCI_MSG_TYPE_R_LOCAL 4 > +#define PCI_MSG_TYPE_R_GATHER 5 > + > +/* INTx Mechanism Messages */ Add "PCIe r6.0, sec 2.2.8.1" > +#define PCI_MSG_CODE_ASSERT_INTA 0x20 > +#define PCI_MSG_CODE_ASSERT_INTB 0x21 > +#define PCI_MSG_CODE_ASSERT_INTC 0x22 > +#define PCI_MSG_CODE_ASSERT_INTD 0x23 > +#define PCI_MSG_CODE_DEASSERT_INTA 0x24 > +#define PCI_MSG_CODE_DEASSERT_INTB 0x25 > +#define PCI_MSG_CODE_DEASSERT_INTC 0x26 > +#define PCI_MSG_CODE_DEASSERT_INTD 0x27 > + > extern const unsigned char pcie_link_speed[]; > extern bool pci_early_dump; > > > -- > 2.34.1 >
