Date: Mon, 18 May 2020 09:26:43 +0000 (UTC) From: Hans Petter Selasky <hselasky@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r361198 - stable/12/sys/compat/linuxkpi/common/include/linux Message-ID: <202005180926.04I9QhiE065022@repo.freebsd.org>
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Author: hselasky Date: Mon May 18 09:26:42 2020 New Revision: 361198 URL: https://svnweb.freebsd.org/changeset/base/361198 Log: MFC r360532: Implement more PCI-express bandwidth functions in the LinuxKPI. Submitted by: ashafer_badland.io (Austin Shafer) Sponsored by: Mellanox Technologies Modified: stable/12/sys/compat/linuxkpi/common/include/linux/pci.h Directory Properties: stable/12/ (props changed) Modified: stable/12/sys/compat/linuxkpi/common/include/linux/pci.h ============================================================================== --- stable/12/sys/compat/linuxkpi/common/include/linux/pci.h Mon May 18 09:25:55 2020 (r361197) +++ stable/12/sys/compat/linuxkpi/common/include/linux/pci.h Mon May 18 09:26:42 2020 (r361198) @@ -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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