svn commit: r345997 - head/sys/dev/pci

2019-09-03 Thread Konstantin Belousov 
Author: kib
Date: Sun Apr  7 08:58:09 2019
New Revision: 345997
URL: https://svnweb.freebsd.org/changeset/base/345997

Log:
  Give new home to the comment from ppt_pci_reset(), explaining a nuance
  of power reset.
  
  Noted by: sor...@cydem.org
  Sponsored by: Mellanox Technologies
  MFC after:12 days

Modified:
  head/sys/dev/pci/pci.c

Modified: head/sys/dev/pci/pci.c
==
--- head/sys/dev/pci/pci.c  Sat Apr  6 23:35:23 2019(r345996)
+++ head/sys/dev/pci/pci.c  Sun Apr  7 08:58:09 2019(r345997)
@@ -6394,6 +6394,11 @@ pcie_flr(device_t dev, u_int max_delay, bool force)
return (true);
 }
 
+/*
+ * Attempt a power-management reset by cycling the device in/out of D3
+ * state.  PCI spec says we can only go into D3 state from D0 state.
+ * Transition from D[12] into D0 before going to D3 state.
+ */
 int
 pci_power_reset(device_t dev)
 {


___
svn-src-all@freebsd.org mailing list
https://lists.freebsd.org/mailman/listinfo/svn-src-all
To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"

svn commit: r345997 - head/sys/dev/pci

2019-04-07 Thread Konstantin Belousov 
Author: kib
Date: Sun Apr  7 08:58:09 2019
New Revision: 345997
URL: https://svnweb.freebsd.org/changeset/base/345997

Log:
  Give new home to the comment from ppt_pci_reset(), explaining a nuance
  of power reset.
  
  Noted by: sor...@cydem.org
  Sponsored by: Mellanox Technologies
  MFC after:12 days

Modified:
  head/sys/dev/pci/pci.c

Modified: head/sys/dev/pci/pci.c
==
--- head/sys/dev/pci/pci.c  Sat Apr  6 23:35:23 2019(r345996)
+++ head/sys/dev/pci/pci.c  Sun Apr  7 08:58:09 2019(r345997)
@@ -6394,6 +6394,11 @@ pcie_flr(device_t dev, u_int max_delay, bool force)
return (true);
 }
 
+/*
+ * Attempt a power-management reset by cycling the device in/out of D3
+ * state.  PCI spec says we can only go into D3 state from D0 state.
+ * Transition from D[12] into D0 before going to D3 state.
+ */
 int
 pci_power_reset(device_t dev)
 {
___
svn-src-all@freebsd.org mailing list
https://lists.freebsd.org/mailman/listinfo/svn-src-all
To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"