Date: Sun, 24 Jul 2016 05:24:10 +0000 (UTC) From: John Baldwin <jhb@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-10@freebsd.org Subject: svn commit: r303255 - in stable: 10/share/man/man9 10/sys/dev/pci 9/share/man/man9 9/sys/dev/pci Message-ID: <201607240524.u6O5OANG008944@repo.freebsd.org>
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Author: jhb Date: Sun Jul 24 05:24:10 2016 New Revision: 303255 URL: https://svnweb.freebsd.org/changeset/base/303255 Log: MFC 302175: Add pci_get_max_payload() to fetch the PCI-express maximum payload size. Modified: stable/10/share/man/man9/pci.9 stable/10/sys/dev/pci/pci.c stable/10/sys/dev/pci/pcivar.h Directory Properties: stable/10/ (props changed) Changes in other areas also in this revision: Modified: stable/9/share/man/man9/pci.9 stable/9/sys/dev/pci/pci.c stable/9/sys/dev/pci/pcivar.h Directory Properties: stable/9/share/man/man9/ (props changed) stable/9/sys/ (props changed) stable/9/sys/dev/ (props changed) Modified: stable/10/share/man/man9/pci.9 ============================================================================== --- stable/10/share/man/man9/pci.9 Sun Jul 24 04:38:50 2016 (r303254) +++ stable/10/share/man/man9/pci.9 Sun Jul 24 05:24:10 2016 (r303255) @@ -25,7 +25,7 @@ .\" .\" $FreeBSD$ .\" -.Dd December 23, 2015 +.Dd June 24, 2016 .Dt PCI 9 .Os .Sh NAME @@ -43,6 +43,7 @@ .Nm pci_find_extcap , .Nm pci_find_htcap , .Nm pci_find_pcie_root_port , +.Nm pci_get_max_payload , .Nm pci_get_max_read_req , .Nm pci_get_powerstate , .Nm pci_get_vpd_ident , @@ -95,6 +96,8 @@ .Ft device_t .Fn pci_find_pcie_root_port "device_t dev" .Ft int +.Fn pci_get_max_payload "device_t dev" +.Ft int .Fn pci_get_max_read_req "device_t dev" .Ft int .Fn pci_get_powerstate "device_t dev" @@ -436,6 +439,16 @@ or .Xr bus_activate_resource 9 . .Pp The +.Fn pci_get_max_payload +function returns the current maximum TLP payload size in bytes for a +PCI-express device. +If the +.Fa dev +device is not a PCI-express device, +.Fn pci_get_max_payload +returns zero. +.Pp +The .Fn pci_get_max_read_req function returns the current maximum read request size in bytes for a PCI-express device. Modified: stable/10/sys/dev/pci/pci.c ============================================================================== --- stable/10/sys/dev/pci/pci.c Sun Jul 24 04:38:50 2016 (r303254) +++ stable/10/sys/dev/pci/pci.c Sun Jul 24 05:24:10 2016 (r303255) @@ -1881,6 +1881,22 @@ pci_ht_map_msi(device_t dev, uint64_t ad } int +pci_get_max_payload(device_t dev) +{ + struct pci_devinfo *dinfo = device_get_ivars(dev); + int cap; + uint16_t val; + + cap = dinfo->cfg.pcie.pcie_location; + if (cap == 0) + return (0); + val = pci_read_config(dev, cap + PCIER_DEVICE_CTL, 2); + val &= PCIEM_CTL_MAX_PAYLOAD; + val >>= 5; + return (1 << (val + 7)); +} + +int pci_get_max_read_req(device_t dev) { struct pci_devinfo *dinfo = device_get_ivars(dev); Modified: stable/10/sys/dev/pci/pcivar.h ============================================================================== --- stable/10/sys/dev/pci/pcivar.h Sun Jul 24 04:38:50 2016 (r303254) +++ stable/10/sys/dev/pci/pcivar.h Sun Jul 24 05:24:10 2016 (r303255) @@ -534,6 +534,7 @@ int pci_msix_device_blacklisted(device_t void pci_ht_map_msi(device_t dev, uint64_t addr); device_t pci_find_pcie_root_port(device_t dev); +int pci_get_max_payload(device_t dev); int pci_get_max_read_req(device_t dev); void pci_restore_state(device_t dev); void pci_save_state(device_t dev);
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