Date: Fri, 1 May 2020 10:32:43 +0000 (UTC) From: Hans Petter Selasky <hselasky@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r360532 - head/sys/compat/linuxkpi/common/include/linux Message-ID: <202005011032.041AWhcK091841@repo.freebsd.org>
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Author: hselasky Date: Fri May 1 10:32:42 2020 New Revision: 360532 URL: https://svnweb.freebsd.org/changeset/base/360532 Log: Implement more PCI-express bandwidth functions in the LinuxKPI. Submitted by: ashafer_badland.io (Austin Shafer) MFC after: 1 week Sponsored by: Mellanox Technologies Modified: head/sys/compat/linuxkpi/common/include/linux/pci.h Modified: head/sys/compat/linuxkpi/common/include/linux/pci.h ============================================================================== --- head/sys/compat/linuxkpi/common/include/linux/pci.h Fri May 1 10:28:21 2020 (r360531) +++ head/sys/compat/linuxkpi/common/include/linux/pci.h Fri May 1 10:32:42 2020 (r360532) @@ -954,6 +954,47 @@ pcie_get_width_cap(struct pci_dev *dev) return (PCIE_LNK_WIDTH_UNKNOWN); } +static inline int +pcie_get_mps(struct pci_dev *dev) +{ + return (pci_get_max_payload(dev->dev.bsddev)); +} + +static inline uint32_t +PCIE_SPEED2MBS_ENC(enum pci_bus_speed spd) +{ + + switch(spd) { + case PCIE_SPEED_16_0GT: + return (16000 * 128 / 130); + case PCIE_SPEED_8_0GT: + return (8000 * 128 / 130); + case PCIE_SPEED_5_0GT: + return (5000 * 8 / 10); + case PCIE_SPEED_2_5GT: + return (2500 * 8 / 10); + default: + return (0); + } +} + +static inline uint32_t +pcie_bandwidth_available(struct pci_dev *pdev, + struct pci_dev **limiting, + enum pci_bus_speed *speed, + enum pcie_link_width *width) +{ + enum pci_bus_speed nspeed = pcie_get_speed_cap(pdev); + enum pcie_link_width nwidth = pcie_get_width_cap(pdev); + + if (speed) + *speed = nspeed; + if (width) + *width = nwidth; + + return (nwidth * PCIE_SPEED2MBS_ENC(nspeed)); +} + /* * The following functions can be used to attach/detach the LinuxKPI's * PCI device runtime. The pci_driver and pci_device_id pointer is
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