[Nouveau] [PATCH 4/9] pci: implement pcie speed change for tesla

Karol Herbst
2015-10-12T20:27:45Z

drm/nouveau/nvkm/subdev/pci/g84.c   | 113 ++++++++++++++++++++++++++++++++++++
 drm/nouveau/nvkm/subdev/pci/g94.c   |  10 ++++
 drm/nouveau/nvkm/subdev/pci/gf100.c |   5 ++
 drm/nouveau/nvkm/subdev/pci/gf106.c |   5 ++
 drm/nouveau/nvkm/subdev/pci/gk104.c |   2 +
 drm/nouveau/nvkm/subdev/pci/priv.h  |   9 +++
 6 files changed, 144 insertions(+)

diff --git a/drm/nouveau/nvkm/subdev/pci/g84.c
b/drm/nouveau/nvkm/subdev/pci/g84.c
index 3faa6bf..e53208e 100644
--- a/drm/nouveau/nvkm/subdev/pci/g84.c
+++ b/drm/nouveau/nvkm/subdev/pci/g84.c
@@ -25,6 +25,109 @@

 #include <core/pci.h>

+u8
+g84_get_pcie_version_supported(struct nvkm_pci *pci)
+{
+	u32 chipset = pci->subdev.device->chipset, reg_v;
+
+	/* these cards report wrong information about what they support */
+	if (chipset == 0x84 || chipset == 0x86)
+		return 1;
+
+	reg_v = nvkm_pci_rd32(pci, 0x460) & 0x200;
+	if (reg_v == 0x200)
+		return 2;
+	return 1;
+}
+
+void
+g84_set_pcie_version(struct nvkm_pci *pci, u8 ver)
+{
+	struct nvkm_device *device = pci->subdev.device;
+
+	if (ver > 1)
+		ver = 1;
+	else
+		ver = 0;
+
+	nvkm_mask(device, 0x00154c, 0x1, ver);
+}
+
+u8
+g84_get_pcie_version(struct nvkm_pci *pci)
+{
+	struct nvkm_device *device = pci->subdev.device;
+	return (nvkm_rd32(device, 0x00154c) & 0x1) + 1;
+}
+
+static void
+g84_set_pcie_cap_speed(struct nvkm_pci *pci, bool full_speed)
+{
+	struct nvkm_device *device = pci->subdev.device;
+	nvkm_mask(device, 0x00154c, 0x80, full_speed ? 0x80 : 0x0);
+}
+
+enum nvkm_pcie_speed
+g84_get_real_speed(struct nvkm_pci *pci)
+{
+	u32 reg_v = nvkm_pci_rd32(pci, 0x88) & 0x30000;
+	switch (reg_v) {
+		case 0x30000:
+			return NVKM_PCIE_SPEED_8_0;
+		case 0x20000:
+			return NVKM_PCIE_SPEED_5_0;
+		case 0x10000:
+		default:
+			return NVKM_PCIE_SPEED_2_5;
+	}
+}
+
+enum nvkm_pcie_speed
+g84_get_pcie_max_speed(struct nvkm_pci *pci)
+{
+	u32 reg_v = nvkm_pci_rd32(pci, 0x460) & 0x3300;
+	if (reg_v == 0x2200)
+		return NVKM_PCIE_SPEED_5_0;
+	return NVKM_PCIE_SPEED_2_5;
+}
+
+void
+g84_set_pcie_sta_speed(struct nvkm_pci *pci, enum nvkm_pcie_speed speed)
+{
+	u32 mask_value;
+
+	if (speed == NVKM_PCIE_SPEED_5_0)
+		mask_value = 0x20;
+	else
+		mask_value = 0x10;
+
+	nvkm_pci_mask(pci, 0x460, 0x30, mask_value);
+	nvkm_pci_mask(pci, 0x460, 0x1, 0x1);
+}
+
+int
+g84_pcie_speed_init(struct nvkm_pci *pci)
+{
+	if (g84_get_real_speed(pci) == NVKM_PCIE_SPEED_2_5)
+		g84_set_pcie_cap_speed(pci, false);
+	else
+		g84_set_pcie_cap_speed(pci, true);
+	return 0;
+}
+
+int
+g84_pcie_speed_set(struct nvkm_pci *pci, enum nvkm_pcie_speed req_speed, u8
req_width)
+{
+	if (req_speed == NVKM_PCIE_SPEED_5_0)
+		g84_set_pcie_cap_speed(pci, true);
+	else
+		g84_set_pcie_cap_speed(pci, false);
+
+	g84_set_pcie_sta_speed(pci, req_speed);
+
+	return 0;
+}
+
 void
 g84_pci_init(struct nvkm_pci *pci)
 {
@@ -55,6 +158,16 @@ g84_pci_func = {
 	.wr08 = nv40_pci_wr08,
 	.wr32 = nv40_pci_wr32,
 	.msi_rearm = nv46_pci_msi_rearm,
+
+	.pcie_speed_init = g84_pcie_speed_init,
+	.pcie_speed_set = g84_pcie_speed_set,
+
+	.pcie_max_speed = g84_get_pcie_max_speed,
+	.pcie_current_speed = g84_get_real_speed,
+
+	.set_pcie_version = g84_set_pcie_version,
+	.get_pcie_version = g84_get_pcie_version,
+	.get_pcie_version_supported = g84_get_pcie_version_supported,
 };

 int
diff --git a/drm/nouveau/nvkm/subdev/pci/g94.c
b/drm/nouveau/nvkm/subdev/pci/g94.c
index cd311ee..1431041 100644
--- a/drm/nouveau/nvkm/subdev/pci/g94.c
+++ b/drm/nouveau/nvkm/subdev/pci/g94.c
@@ -30,6 +30,16 @@ g94_pci_func = {
 	.wr08 = nv40_pci_wr08,
 	.wr32 = nv40_pci_wr32,
 	.msi_rearm = nv40_pci_msi_rearm,
+
+	.pcie_speed_init = g84_pcie_speed_init,
+	.pcie_speed_set = g84_pcie_speed_set,
+
+	.pcie_max_speed = g84_get_pcie_max_speed,
+	.pcie_current_speed = g84_get_real_speed,
+
+	.set_pcie_version = g84_set_pcie_version,
+	.get_pcie_version = g84_get_pcie_version,
+	.get_pcie_version_supported = g84_get_pcie_version_supported,
 };

 int
diff --git a/drm/nouveau/nvkm/subdev/pci/gf100.c
b/drm/nouveau/nvkm/subdev/pci/gf100.c
index 25e1ae7..bd88dd5 100644
--- a/drm/nouveau/nvkm/subdev/pci/gf100.c
+++ b/drm/nouveau/nvkm/subdev/pci/gf100.c
@@ -36,6 +36,11 @@ gf100_pci_func = {
 	.wr08 = nv40_pci_wr08,
 	.wr32 = nv40_pci_wr32,
 	.msi_rearm = gf100_pci_msi_rearm,
+
+	.pcie_max_speed = g84_get_pcie_max_speed,
+	.pcie_current_speed = g84_get_real_speed,
+
+	.get_pcie_version_supported = g84_get_pcie_version_supported,
 };

 int
diff --git a/drm/nouveau/nvkm/subdev/pci/gf106.c
b/drm/nouveau/nvkm/subdev/pci/gf106.c
index a3d451e..e2223b9 100644
--- a/drm/nouveau/nvkm/subdev/pci/gf106.c
+++ b/drm/nouveau/nvkm/subdev/pci/gf106.c
@@ -29,6 +29,11 @@ gf106_pci_func = {
 	.wr08 = nv40_pci_wr08,
 	.wr32 = nv40_pci_wr32,
 	.msi_rearm = nv40_pci_msi_rearm,
+
+	.pcie_max_speed = g84_get_pcie_max_speed,
+	.pcie_current_speed = g84_get_real_speed,
+
+	.get_pcie_version_supported = g84_get_pcie_version_supported,
 };

 int
diff --git a/drm/nouveau/nvkm/subdev/pci/gk104.c
b/drm/nouveau/nvkm/subdev/pci/gk104.c
index 95ecc51..7b6bb5b 100644
--- a/drm/nouveau/nvkm/subdev/pci/gk104.c
+++ b/drm/nouveau/nvkm/subdev/pci/gk104.c
@@ -29,6 +29,8 @@ gk104_pci_func = {
 	.wr08 = nv40_pci_wr08,
 	.wr32 = nv40_pci_wr32,
 	.msi_rearm = nv40_pci_msi_rearm,
+
+	.pcie_current_speed = g84_get_real_speed,
 };

 int
diff --git a/drm/nouveau/nvkm/subdev/pci/priv.h
b/drm/nouveau/nvkm/subdev/pci/priv.h
index 11c266f..9c62164 100644
--- a/drm/nouveau/nvkm/subdev/pci/priv.h
+++ b/drm/nouveau/nvkm/subdev/pci/priv.h
@@ -33,5 +33,14 @@ void nv46_pci_msi_rearm(struct nvkm_pci *);

 void g84_pci_init(struct nvkm_pci *pci);

+void g84_set_pcie_version(struct nvkm_pci *, u8);
+u8 g84_get_pcie_version(struct nvkm_pci *);
+u8 g84_get_pcie_version_supported(struct nvkm_pci *);
+void g84_set_pcie_sta_speed(struct nvkm_pci *, enum nvkm_pcie_speed);
+enum nvkm_pcie_speed g84_get_real_speed(struct nvkm_pci *);
+enum nvkm_pcie_speed g84_get_pcie_max_speed(struct nvkm_pci *);
+int g84_pcie_speed_init(struct nvkm_pci *);
+int g84_pcie_speed_set(struct nvkm_pci *, enum nvkm_pcie_speed, u8);
+
 int nvkm_pci_pcie_init(struct nvkm_pci *pci);
 #endif
--
2.6.1