svn commit: r355110 - stable/12/sys/dev/ntb/ntb_hw

[Alexander Motin]

Author: mav
Date: Tue Nov 26 15:21:01 2019
New Revision: 355110
URL: https://svnweb.freebsd.org/changeset/base/355110

Log:
  MFC r354840: Call bus_dma_dmar_set_buswide(9) added in r354830.
  
  PLX NTB sends translated DMA requests not only from itsels, but from all
  slots and functions of its bus.  By default DMAR blocks those additional.

Modified:
  stable/12/sys/dev/ntb/ntb_hw/ntb_hw_plx.c
Directory Properties:
  stable/12/   (props changed)

Modified: stable/12/sys/dev/ntb/ntb_hw/ntb_hw_plx.c
==============================================================================
--- stable/12/sys/dev/ntb/ntb_hw/ntb_hw_plx.c	Tue Nov 26 14:25:50 2019	(r355109)
+++ stable/12/sys/dev/ntb/ntb_hw/ntb_hw_plx.c	Tue Nov 26 15:21:01 2019	(r355110)
@@ -339,6 +339,12 @@ ntb_plx_attach(device_t dev)
 		return (ENXIO);
 	}
 
+	/*
+	 * The device occupies whole bus.  In translated TLP slot field
+	 * keeps LUT index (original bus/slot), function is passed through.
+	 */
+	bus_dma_dmar_set_buswide(dev);
+
 	/* Identify chip port we are connected to. */
 	val = bus_read_4(sc->conf_res, 0x360);
 	sc->port = (val >> ((sc->ntx == 0) ? 8 : 16)) & 0x1f;