add verbose output of msi-x structure

Reference: /n/atom/patch/applied2013/pciverbmcix
Date: Fri Dec 27 11:16:54 CET 2013
Signed-off-by: quanstro@quanstro.net

--- /sys/src/cmd/pci/pci.c	Fri Dec 27 11:16:45 2013
+++ /sys/src/cmd/pci/pci.c	Fri Dec 27 11:16:46 2013
@@ -63,6 +63,8 @@
 	char *s, *si;
 	uint dcr, cap, i, j;
 
+	Bprint(&o, "\t" "pcie\n");
+
 	cap = pcicfgr16(p, off + PciePCP);
 	i = cap>>4 & 0xf;
 	s = "unknown device type";
@@ -71,10 +73,10 @@
 	si = "";
 	if(i == 4 || i == 6)
 		si = cap&1<<8? "; slot": "; integrated";
-	Bprint(&o, "	pcie type: %s%s; msgs %d\n", s, si, cap>>9 & 0x3f);
+	Bprint(&o, "\t\tpcie type: %s%s; msgs %d\n", s, si, cap>>9 & 0x3f);
 
 	dcr = pcicfgr16(p, off + PcieDCR);
-	Bprint(&o, "	device control: %.4ux; ", dcr);
+	Bprint(&o, "\t\tdevice control: %.4ux; ", dcr);
 	for(i = 0; i < nelem(dcrtab); i++){
 		if(dcr & dcrtab[i].v)
 			Bprint(&o, "%s ", dcrtab[i].s);
@@ -85,10 +87,10 @@
 	i = cap & 7;
 	for(j = 128; i != 0; i--)
 		j *= 2;
-	Bprint(&o, "	max payload: %d bytes; pp %d\n", j, i>>3 & 3);
+	Bprint(&o, "\t\t" "max payload: %d bytes; pp %d\n", j, i>>3 & 3);
 
-	linkdump(p, off + PcieLCA, "	link cap");
-	linkdump(p, off + PcieLSR, "	link stat");
+	linkdump(p, off + PcieLCA, "\t\t" "link cap");
+	linkdump(p, off + PcieLSR, "\t\t" "link stat");
 
 	cap = pcicfgr32(p, off + PcieSCA);
 	i = pcicfgr16(p, off + PcieSSR);
@@ -96,7 +98,19 @@
 	if(i & 1<<6)
 		s = "present";
 	j = pcicfgr32(p, off + PcieLCA);
-	Bprint(&o, "	slot number: %d; port %d; %s\n", cap>>19, j>>24, s);
+	Bprint(&o, "\t\t" "slot number: %d; port %d; %s\n", cap>>19, j>>24, s);
+}
+
+void
+msixdump(Pcidev *p, int off)
+{
+	u32int u;
+
+	Bprint(&o, "\t" "msi-x\n");
+	u = pcicfgr32(p, off + 0);
+	Bprint(&o, "\t\t" "table: offset %.8ux; bar %d\n", u&~7, u&7);
+	u = pcicfgr32(p, off + 4);
+	Bprint(&o, "\t\t" "pba: offset %.8ux; bar %d\n", u&~7, u&7);
 }
 
 typedef struct Captab Captab;
@@ -123,7 +137,7 @@
 0x0e,	"agp8",		nil,
 0x0f,	"secure",		nil,
 0x10,	"pcie",		pciedump,
-0x11,	"msi-x",		nil,
+0x11,	"msi-x",		msixdump,
 0x12,	"satad/i",		nil,
 0x13,	"advfeat",		nil,
 };