Xen devel - Feb 2008 - [PATCH][IOEMU] e1000 emulation

The attached patch adds e1000 emulation to Xen.  This is a direct
port of the e1000 driver currently in Qemu CVS with extremely minimal
changes (as shown below).  This is useful for Xen as new OSes may not
support the old 100Mbps NICs we currently support (especially on
non-x86).  Drivers for e1000 should be more readily available.

The diff from Qemu CVS is as follows (for reference only):

--- e1000.c	2008-02-25 14:12:52.000000000 -0700
+++ e1000.c	2008-02-25 14:14:51.000000000 -0700
@@ -23,9 +23,7 @@
  */
 
 
-#include "hw.h"
-#include "pci.h"
-#include "net.h"
+#include "vl.h"
 
 #include "e1000_hw.h"
 
@@ -153,7 +151,7 @@
     if (val)
         val |= E1000_ICR_INT_ASSERTED;
     s->mac_reg[ICR] = val;
-    qemu_set_irq(s->dev.irq[0], (s->mac_reg[IMS] &
s->mac_reg[ICR]) != 0);
+    pci_set_irq(&s->dev, 0, (s->mac_reg[IMS] &
s->mac_reg[ICR]) != 0);
 }
 
 static void

Both Linux and Windows Server 2008 guests work with this device model on
Xen/ia64.  Please apply the attached patch.  Thanks,

	Alex



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>   The attached patch adds e1000 emulation to Xen.  This is a direct
>port of the e1000 driver currently in Qemu CVS with extremely minimal
>changes (as shown below).  This is useful for Xen as new OSes may not
>support the old 100Mbps NICs we currently support (especially on
>non-x86).  Drivers for e1000 should be more readily available.
	
	Per Intel 82540EM Software Developer''s Manual pp. 211,
	the mmio size is 0x20000, or address overlapping occurs
	and causes the second card to fail, which happened to me
	earlier.

	Tina


--- tools/ioemu/hw/e1000.c.orig 2008-02-26 10:55:00.113124000 -0800
+++ tools/ioemu/hw/e1000.c      2008-02-26 10:55:00.111124000 -0800
@@ -48,7 +48,7 @@ static int debugflags = DBGBIT(TXERR) |
 #endif

 #define IOPORT_SIZE       0x40
-#define PNPMMIO_SIZE      0x60000
+#define PNPMMIO_SIZE      0x20000

 /*
  * HW models:



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