From 7c923844bf618d8d9cbe49901089915afba86f2e Mon Sep 17 00:00:00 2001
From: Karol Herbst <nouveau@karolherbst.de>
Date: Tue, 5 Jan 2016 21:44:39 +0100
Subject: [PATCH] drm/nouveau/pci: implement pcie speed change for Fermi

v5: don't set kepler func pointers
v6: fix alignment and line length
---
 .../gpu/drm/nouveau/nvkm/subdev/pci/gf100.c   | 57 +++++++++++++++++++
 .../gpu/drm/nouveau/nvkm/subdev/pci/gf106.c   | 10 ++++
 .../gpu/drm/nouveau/nvkm/subdev/pci/priv.h    |  7 +++
 3 files changed, 74 insertions(+)

diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/pci/gf100.c b/drivers/gpu/drm/nouveau/nvkm/subdev/pci/gf100.c
index 25e1ae70867f..e30ea676baf6 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/pci/gf100.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/pci/gf100.c
@@ -29,6 +29,53 @@ gf100_pci_msi_rearm(struct nvkm_pci *pci)
 	nvkm_pci_wr08(pci, 0x0704, 0xff);
 }
 
+void
+gf100_pcie_set_version(struct nvkm_pci *pci, u8 ver)
+{
+	struct nvkm_device *device = pci->subdev.device;
+	nvkm_mask(device, 0x02241c, 0x1, ver > 1 ? 1 : 0);
+}
+
+int
+gf100_pcie_version(struct nvkm_pci *pci)
+{
+	struct nvkm_device *device = pci->subdev.device;
+	return (nvkm_rd32(device, 0x02241c) & 0x1) + 1;
+}
+
+void
+gf100_pcie_set_cap_speed(struct nvkm_pci *pci, bool full_speed)
+{
+	struct nvkm_device *device = pci->subdev.device;
+	nvkm_mask(device, 0x02241c, 0x80, full_speed ? 0x80 : 0x0);
+}
+
+int
+gf100_pcie_cap_speed(struct nvkm_pci *pci)
+{
+	struct nvkm_device *device = pci->subdev.device;
+	u8 punits_pci_cap_speed = nvkm_rd32(device, 0x02241c) & 0x80;
+	if (punits_pci_cap_speed == 0x80)
+		return 1;
+	return 0;
+}
+
+int
+gf100_pcie_init(struct nvkm_pci *pci)
+{
+	bool full_speed = g84_pcie_cur_speed(pci) == NVKM_PCIE_SPEED_5_0;
+	gf100_pcie_set_cap_speed(pci, full_speed);
+	return 0;
+}
+
+int
+gf100_pcie_set_link(struct nvkm_pci *pci, enum nvkm_pcie_speed speed, u8 width)
+{
+	gf100_pcie_set_cap_speed(pci, speed == NVKM_PCIE_SPEED_5_0);
+	g84_pcie_set_link_speed(pci, speed);
+	return 0;
+}
+
 static const struct nvkm_pci_func
 gf100_pci_func = {
 	.init = g84_pci_init,
@@ -36,6 +83,16 @@ gf100_pci_func = {
 	.wr08 = nv40_pci_wr08,
 	.wr32 = nv40_pci_wr32,
 	.msi_rearm = gf100_pci_msi_rearm,
+
+	.pcie.init = gf100_pcie_init,
+	.pcie.set_link = gf100_pcie_set_link,
+
+	.pcie.max_speed = g84_pcie_max_speed,
+	.pcie.cur_speed = g84_pcie_cur_speed,
+
+	.pcie.set_version = gf100_pcie_set_version,
+	.pcie.version = gf100_pcie_version,
+	.pcie.version_supported = g94_pcie_version_supported,
 };
 
 int
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/pci/gf106.c b/drivers/gpu/drm/nouveau/nvkm/subdev/pci/gf106.c
index 6c4f2ba7e76b..c3b798c5c6dd 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/pci/gf106.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/pci/gf106.c
@@ -30,6 +30,16 @@ gf106_pci_func = {
 	.wr08 = nv40_pci_wr08,
 	.wr32 = nv40_pci_wr32,
 	.msi_rearm = nv40_pci_msi_rearm,
+
+	.pcie.init = gf100_pcie_init,
+	.pcie.set_link = gf100_pcie_set_link,
+
+	.pcie.max_speed = g84_pcie_max_speed,
+	.pcie.cur_speed = g84_pcie_cur_speed,
+
+	.pcie.set_version = gf100_pcie_set_version,
+	.pcie.version = gf100_pcie_version,
+	.pcie.version_supported = g94_pcie_version_supported,
 };
 
 int
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/pci/priv.h b/drivers/gpu/drm/nouveau/nvkm/subdev/pci/priv.h
index 8c389a61d5a1..23de3180aae5 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/pci/priv.h
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/pci/priv.h
@@ -46,6 +46,13 @@ int g84_pcie_set_link(struct nvkm_pci *, enum nvkm_pcie_speed, u8);
 
 int g94_pcie_version_supported(struct nvkm_pci *);
 
+void gf100_pcie_set_version(struct nvkm_pci *, u8);
+int gf100_pcie_version(struct nvkm_pci *);
+void gf100_pcie_set_cap_speed(struct nvkm_pci *, bool);
+int gf100_pcie_cap_speed(struct nvkm_pci *);
+int gf100_pcie_init(struct nvkm_pci *);
+int gf100_pcie_set_link(struct nvkm_pci *, enum nvkm_pcie_speed, u8);
+
 int nvkm_pcie_oneinit(struct nvkm_pci *);
 int nvkm_pcie_init(struct nvkm_pci *);
 #endif
-- 
2.30.2