svn commit: r354840 - head/sys/dev/ntb/ntb_hw

[Alexander Motin]

Author: mav
Date: Tue Nov 19 02:03:10 2019
New Revision: 354840
URL: https://svnweb.freebsd.org/changeset/base/354840

Log:
  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.
  
  MFC after:	1 week
  Sponsored by:	iXsystems, Inc.

Modified:
  head/sys/dev/ntb/ntb_hw/ntb_hw_plx.c

Modified: head/sys/dev/ntb/ntb_hw/ntb_hw_plx.c
==============================================================================
--- head/sys/dev/ntb/ntb_hw/ntb_hw_plx.c	Tue Nov 19 02:00:13 2019	(r354839)
+++ head/sys/dev/ntb/ntb_hw/ntb_hw_plx.c	Tue Nov 19 02:03:10 2019	(r354840)
@@ -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;