Author: hselasky
Date: Mon May 18 09:34:41 2020
New Revision: 361200
URL: https://svnweb.freebsd.org/changeset/base/361200
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/11/sys/compat/linuxkpi/common/include/linux/pci.h
Directory Properties:
stable/11/ (props changed)
Modified: stable/11/sys/compat/linuxkpi/common/include/linux/pci.h
==============================================================================
--- stable/11/sys/compat/linuxkpi/common/include/linux/pci.h Mon May 18
09:32:56 2020 (r361199)
+++ stable/11/sys/compat/linuxkpi/common/include/linux/pci.h Mon May 18
09:34:41 2020 (r361200)
@@ -970,4 +970,45 @@ 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));
+}
+
#endif /* _LINUX_PCI_H_ */
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