[Qemu-devel] [RFC PATCH 7/7] ac97: IOMMU support

[Eduard - Gabriel Munteanu]

Memory accesses must go through the IOMMU layer.

Signed-off-by: Eduard - Gabriel Munteanu <address@hidden>
---
 hw/ac97.c |   20 +++++++++++++++++---
 1 files changed, 17 insertions(+), 3 deletions(-)

diff --git a/hw/ac97.c b/hw/ac97.c
index 4319bc8..0e30d80 100644
--- a/hw/ac97.c
+++ b/hw/ac97.c
@@ -15,6 +15,7 @@
  */
 
 #include "hw.h"
+#include "iommu.h"
 #include "audiodev.h"
 #include "audio/audio.h"
 #include "pci.h"
@@ -221,9 +222,13 @@ static void cold_reset (AC97LinkState * s)
 
 static void fetch_bd (AC97LinkState *s, AC97BusMasterRegs *r)
 {
+    struct iommu *iommu;
+    DeviceState *dev;
     uint8_t b[8];
 
-    cpu_physical_memory_read (r->bdbar + r->civ * 8, b, 8);
+    iommu = iommu_get(&s->dev.qdev, &dev);
+
+    iommu_read (iommu, dev, r->bdbar + r->civ * 8, b, 8);
     r->bd_valid = 1;
     r->bd.addr = le32_to_cpu (*(uint32_t *) &b[0]) & ~3;
     r->bd.ctl_len = le32_to_cpu (*(uint32_t *) &b[4]);
@@ -962,6 +967,9 @@ static int write_audio (AC97LinkState *s, AC97BusMasterRegs 
*r,
     uint32_t temp = r->picb << 1;
     uint32_t written = 0;
     int to_copy = 0;
+    struct iommu *iommu;
+    DeviceState *dev;
+
     temp = audio_MIN (temp, max);
 
     if (!temp) {
@@ -969,10 +977,12 @@ static int write_audio (AC97LinkState *s, 
AC97BusMasterRegs *r,
         return 0;
     }
 
+    iommu = iommu_get(&s->dev.qdev, &dev);
+
     while (temp) {
         int copied;
         to_copy = audio_MIN (temp, sizeof (tmpbuf));
-        cpu_physical_memory_read (addr, tmpbuf, to_copy);
+        iommu_read (iommu, dev, addr, tmpbuf, to_copy);
         copied = AUD_write (s->voice_po, tmpbuf, to_copy);
         dolog ("write_audio max=%x to_copy=%x copied=%x\n",
                max, to_copy, copied);
@@ -1040,6 +1050,10 @@ static int read_audio (AC97LinkState *s, 
AC97BusMasterRegs *r,
     uint32_t nread = 0;
     int to_copy = 0;
     SWVoiceIn *voice = (r - s->bm_regs) == MC_INDEX ? s->voice_mc : 
s->voice_pi;
+    struct iommu *iommu;
+    DeviceState *dev;
+
+    iommu = iommu_get(&s->dev.qdev, &dev);
 
     temp = audio_MIN (temp, max);
 
@@ -1056,7 +1070,7 @@ static int read_audio (AC97LinkState *s, 
AC97BusMasterRegs *r,
             *stop = 1;
             break;
         }
-        cpu_physical_memory_write (addr, tmpbuf, acquired);
+        iommu_write (iommu, dev, addr, tmpbuf, acquired);
         temp -= acquired;
         addr += acquired;
         nread += acquired;
-- 
1.7.1