These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / drivers / gpu / drm / nouveau / nvkm / subdev / pci / nv46.c

diff --git a/kernel/drivers/gpu/drm/nouveau/nvkm/subdev/pci/nv46.c b/kernel/drivers/gpu/drm/nouveau/nvkm/subdev/pci/nv46.c
new file mode 100644 (file)
index 0000000..fc617e4
--- /dev/null
+++ b/kernel/drivers/gpu/drm/nouveau/nvkm/subdev/pci/nv46.c
@@ -0,0 +1,51 @@
+/*
+ * Copyright 2015 Red Hat Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: Ben Skeggs <bskeggs@redhat.com>
+ */
+#include "priv.h"
+
+#include <core/pci.h>
+
+/* MSI re-arm through the PRI appears to be broken on NV46/NV50/G84/G86/G92,
+ * so we access it via alternate PCI config space mechanisms.
+ */
+void
+nv46_pci_msi_rearm(struct nvkm_pci *pci)
+{
+       struct nvkm_device *device = pci->subdev.device;
+       struct pci_dev *pdev = device->func->pci(device)->pdev;
+       pci_write_config_byte(pdev, 0x68, 0xff);
+}
+
+static const struct nvkm_pci_func
+nv46_pci_func = {
+       .rd32 = nv40_pci_rd32,
+       .wr08 = nv40_pci_wr08,
+       .wr32 = nv40_pci_wr32,
+       .msi_rearm = nv46_pci_msi_rearm,
+};
+
+int
+nv46_pci_new(struct nvkm_device *device, int index, struct nvkm_pci **ppci)
+{
+       return nvkm_pci_new_(&nv46_pci_func, device, index, ppci);
+}