pseries: Convert sPAPR TCEs to use generic IOMMU infrastructure

The pseries platform already contains an IOMMU implementation, since it is
essential for the platform's paravirtualized VIO devices.  This IOMMU
support is currently built into the implementation of the VIO "bus" and
the various VIO devices.

This patch converts this code to make use of the new common IOMMU
infrastructure.

We don't yet handle synchronization of map/unmap callbacks vs. invalidations,
this will require some complex interaction with the kernel and is not a
major concern at this stage.

Cc: Alex Graf <agraf@suse.de>

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

1 files changed, 14 insertions, 12 deletions

diff --git a/hw/spapr_vscsi.c b/hw/spapr_vscsi.c
index 2f09616dd5..3cf5844e0f 100644
--- a/hw/spapr_vscsi.c
+++ b/hw/spapr_vscsi.c
@@ -165,7 +165,7 @@ static int vscsi_send_iu(VSCSIState *s, vscsi_req *req,
     long rc, rc1;
 
     /* First copy the SRP */
-    rc = spapr_tce_dma_write(&s->vdev, req->crq.s.IU_data_ptr,
+    rc = spapr_vio_dma_write(&s->vdev, req->crq.s.IU_data_ptr,
                              &req->iu, length);
     if (rc) {
         fprintf(stderr, "vscsi_send_iu: DMA write failure !\n");
@@ -281,9 +281,9 @@ static int vscsi_srp_direct_data(VSCSIState *s, vscsi_req *req,
     llen = MIN(len, md->len);
     if (llen) {
         if (req->writing) { /* writing = to device = reading from memory */
-            rc = spapr_tce_dma_read(&s->vdev, md->va, buf, llen);
+            rc = spapr_vio_dma_read(&s->vdev, md->va, buf, llen);
         } else {
-            rc = spapr_tce_dma_write(&s->vdev, md->va, buf, llen);
+            rc = spapr_vio_dma_write(&s->vdev, md->va, buf, llen);
         }
     }
     md->len -= llen;
@@ -329,10 +329,11 @@ static int vscsi_srp_indirect_data(VSCSIState *s, vscsi_req *req,
             md = req->cur_desc = &req->ext_desc;
             dprintf("VSCSI:   Reading desc from 0x%llx\n",
                     (unsigned long long)td->va);
-            rc = spapr_tce_dma_read(&s->vdev, td->va, md,
+            rc = spapr_vio_dma_read(&s->vdev, td->va, md,
                                     sizeof(struct srp_direct_buf));
             if (rc) {
-                dprintf("VSCSI: tce_dma_read -> %d reading ext_desc\n", rc);
+                dprintf("VSCSI: spapr_vio_dma_read -> %d reading ext_desc\n",
+                        rc);
                 break;
             }
             vscsi_swap_desc(md);
@@ -345,12 +346,12 @@ static int vscsi_srp_indirect_data(VSCSIState *s, vscsi_req *req,
         /* Perform transfer */
         llen = MIN(len, md->len);
         if (req->writing) { /* writing = to device = reading from memory */
-            rc = spapr_tce_dma_read(&s->vdev, md->va, buf, llen);
+            rc = spapr_vio_dma_read(&s->vdev, md->va, buf, llen);
         } else {
-            rc = spapr_tce_dma_write(&s->vdev, md->va, buf, llen);
+            rc = spapr_vio_dma_write(&s->vdev, md->va, buf, llen);
         }
         if (rc) {
-            dprintf("VSCSI: tce_dma_r/w(%d) -> %d\n", req->writing, rc);
+            dprintf("VSCSI: spapr_vio_dma_r/w(%d) -> %d\n", req->writing, rc);
             break;
         }
         dprintf("VSCSI:     data: %02x %02x %02x %02x...\n",
@@ -728,7 +729,7 @@ static int vscsi_send_adapter_info(VSCSIState *s, vscsi_req *req)
     sinfo = &req->iu.mad.adapter_info;
 
 #if 0 /* What for ? */
-    rc = spapr_tce_dma_read(&s->vdev, be64_to_cpu(sinfo->buffer),
+    rc = spapr_vio_dma_read(&s->vdev, be64_to_cpu(sinfo->buffer),
                             &info, be16_to_cpu(sinfo->common.length));
     if (rc) {
         fprintf(stderr, "vscsi_send_adapter_info: DMA read failure !\n");
@@ -742,7 +743,7 @@ static int vscsi_send_adapter_info(VSCSIState *s, vscsi_req *req)
     info.os_type = cpu_to_be32(2);
     info.port_max_txu[0] = cpu_to_be32(VSCSI_MAX_SECTORS << 9);
 
-    rc = spapr_tce_dma_write(&s->vdev, be64_to_cpu(sinfo->buffer),
+    rc = spapr_vio_dma_write(&s->vdev, be64_to_cpu(sinfo->buffer),
                              &info, be16_to_cpu(sinfo->common.length));
     if (rc)  {
         fprintf(stderr, "vscsi_send_adapter_info: DMA write failure !\n");
@@ -805,7 +806,7 @@ static void vscsi_got_payload(VSCSIState *s, vscsi_crq *crq)
     }
 
     /* XXX Handle failure differently ? */
-    if (spapr_tce_dma_read(&s->vdev, crq->s.IU_data_ptr, &req->iu,
+    if (spapr_vio_dma_read(&s->vdev, crq->s.IU_data_ptr, &req->iu,
                            crq->s.IU_length)) {
         fprintf(stderr, "vscsi_got_payload: DMA read failure !\n");
         vscsi_put_req(req);
@@ -947,7 +948,7 @@ static int spapr_vscsi_devnode(VIOsPAPRDevice *dev, void *fdt, int node_off)
 }
 
 static Property spapr_vscsi_properties[] = {
-    DEFINE_SPAPR_PROPERTIES(VSCSIState, vdev, 0x10000000),
+    DEFINE_SPAPR_PROPERTIES(VSCSIState, vdev),
     DEFINE_PROP_END_OF_LIST(),
 };
 
@@ -964,6 +965,7 @@ static void spapr_vscsi_class_init(ObjectClass *klass, void *data)
     k->dt_compatible = "IBM,v-scsi";
     k->signal_mask = 0x00000001;
     dc->props = spapr_vscsi_properties;
+    k->rtce_window_size = 0x10000000;
 }
 
 static TypeInfo spapr_vscsi_info = {