On Fri, Feb 21, 2025 at 10:29:48AM -0500, Yazen Ghannam wrote: > On Fri, Feb 07, 2025 at 06:18:35PM +0200, Ilpo Järvinen wrote: > > PCIe r6.0 added Flit mode that mainly alters HW behavior but some OS > > visible changes are also because of it. The OS visible changes include > > The first sentence reads oddly. Maybe a slight change? > > "...but there are some OS visible changes because of it." Updated locally. > > + if (dev->bus && dev->bus->flit_mode) > > + flit_mode = ", in Flit mode"; > > + > > if (bw_avail >= bw_cap && verbose) > > - pci_info(dev, "%u.%03u Gb/s available PCIe bandwidth (%s x%d link)\n", > > + pci_info(dev, "%u.%03u Gb/s available PCIe bandwidth (%s x%d link)%s\n", > > bw_cap / 1000, bw_cap % 1000, > > - pci_speed_string(speed_cap), width_cap); > > + pci_speed_string(speed_cap), width_cap, flit_mode); > > else if (bw_avail < bw_cap) > > - pci_info(dev, "%u.%03u Gb/s available PCIe bandwidth, limited by %s x%d link at %s (capable of %u.%03u Gb/s with %s x%d link)\n", > > + pci_info(dev, "%u.%03u Gb/s available PCIe bandwidth, limited by %s x%d link at %s (capable of %u.%03u Gb/s with %s x%d link)%s\n", > > bw_avail / 1000, bw_avail % 1000, > > pci_speed_string(speed), width, > > limiting_dev ? pci_name(limiting_dev) : "<unknown>", > > bw_cap / 1000, bw_cap % 1000, > > - pci_speed_string(speed_cap), width_cap); > > + pci_speed_string(speed_cap), width_cap, flit_mode); > > Does the "Flit mode" message *need* to go into these lines? Could it be > its own message? I suppose it doesn't need to be there, and these bandwidth lines are already pretty long (my fault, open to suggestions to shorten them), but I do think it's useful to have related info all on the same line. > +#include <linux/string_choices.h> > > @@ -6190,21 +6190,25 @@ void __pcie_print_link_status(struct pci_dev *dev, bool verbose) > enum pci_bus_speed speed, speed_cap; > struct pci_dev *limiting_dev = NULL; > u32 bw_avail, bw_cap; > > bw_cap = pcie_bandwidth_capable(dev, &speed_cap, &width_cap); > bw_avail = pcie_bandwidth_available(dev, &limiting_dev, &speed, &width); > > + if (dev->bus) > + pci_info(dev, "Flit mode: %s\n", str_enabled_disabled(dev->bus->flit_mode); > + > if (bw_avail >= bw_cap && verbose) > pci_info(dev, "%u.%03u Gb/s available PCIe bandwidth (%s x%d link)\n", > bw_cap / 1000, bw_cap % 1000, > pci_speed_string(speed_cap), width_cap); > else if (bw_avail < bw_cap) > pci_info(dev, "%u.%03u Gb/s available PCIe bandwidth, limited by %s x%d link at %s (capable of %u.%03u Gb/s with %s x%d link)\n", > bw_avail / 1000, bw_avail % 1000, > pci_speed_string(speed), width, > limiting_dev ? pci_name(limiting_dev) : "<unknown>", > bw_cap / 1000, bw_cap % 1000, > pci_speed_string(speed_cap), width_cap); > > > }
