From: Mikko Perttunen <mperttunen@xxxxxxxxxx>
Program virtualization tables specifying which VMs have access to which
Host1x hardware resources. Programming these has become mandatory in
Tegra234.
For now, since the driver does not operate as a Host1x hypervisor, we
basically allow access to everything to everyone.
Signed-off-by: Mikko Perttunen <mperttunen@xxxxxxxxxx>
---
drivers/gpu/host1x/dev.c | 21 ++++++++++++++++++---
drivers/gpu/host1x/dev.h | 8 ++++++++
2 files changed, 26 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/host1x/dev.c b/drivers/gpu/host1x/dev.c
index 8c6ce8014c09..5a57165ab0f6 100644
--- a/drivers/gpu/host1x/dev.c
+++ b/drivers/gpu/host1x/dev.c
@@ -217,7 +217,7 @@ static const struct of_device_id host1x_of_match[] = {
};
MODULE_DEVICE_TABLE(of, host1x_of_match);
-static void host1x_setup_sid_table(struct host1x *host)
+static void host1x_setup_virtualization_tables(struct host1x *host)
{
const struct host1x_info *info = host->info;
unsigned int i;
@@ -231,6 +231,21 @@ static void host1x_setup_sid_table(struct host1x *host)
host1x_hypervisor_writel(host, entry->offset, entry->base);
host1x_hypervisor_writel(host, entry->limit, entry->base + 4);
}
+
+ for (i = 0; i < info->streamid_vm_table.count; i++) {
+ /* Allow access to all stream IDs to all VMs. */
+ host1x_hypervisor_writel(host, 0xff, info->streamid_vm_table.base + 4 * i);
+ }
+
+ for (i = 0; i < info->classid_vm_table.count; i++) {
+ /* Allow access to all classes to all VMs. */
+ host1x_hypervisor_writel(host, 0xff, info->classid_vm_table.base + 4 * i);
+ }
+
+ for (i = 0; i < info->mmio_vm_table.count; i++) {
+ /* Use VM1 (that's us) as originator VMID for engine MMIO accesses. */
+ host1x_hypervisor_writel(host, 0x1, info->mmio_vm_table.base + 4 * i);
+ }
}
static bool host1x_wants_iommu(struct host1x *host1x)
@@ -602,7 +617,7 @@ static int __maybe_unused host1x_runtime_suspend(struct device *dev)
return 0;
resume_host1x:
- host1x_setup_sid_table(host);
+ host1x_setup_virtualization_tables(host);
host1x_syncpt_restore(host);
host1x_intr_start(host);
@@ -632,7 +647,7 @@ static int __maybe_unused host1x_runtime_resume(struct device *dev)
goto disable_clk;
}
- host1x_setup_sid_table(host);
+ host1x_setup_virtualization_tables(host);
host1x_syncpt_restore(host);
host1x_intr_start(host);
diff --git a/drivers/gpu/host1x/dev.h b/drivers/gpu/host1x/dev.h
index 85edcc6e0fc7..920e5548cfbc 100644
--- a/drivers/gpu/host1x/dev.h
+++ b/drivers/gpu/host1x/dev.h
@@ -90,6 +90,11 @@ struct host1x_sid_entry {
unsigned int limit;
};
+struct host1x_table_desc {
+ unsigned int base;
+ unsigned int count;
+};
+
struct host1x_info {
unsigned int nb_channels; /* host1x: number of channels supported */
unsigned int nb_pts; /* host1x: number of syncpoints supported */
@@ -103,6 +108,9 @@ struct host1x_info {
bool has_common; /* has common registers separate from hypervisor */
unsigned int num_sid_entries;
const struct host1x_sid_entry *sid_table;
+ struct host1x_table_desc streamid_vm_table;
+ struct host1x_table_desc classid_vm_table;
+ struct host1x_table_desc mmio_vm_table;
/*
* On T20-T148, the boot chain may setup DC to increment syncpoints
* 26/27 on VBLANK. As such we cannot use these syncpoints until
--
2.36.1
