[Nouveau] [PATCH v2 4/9] pci: implement pcie speed change for tesla
Karol Herbst
nouveau at karolherbst.de
Tue Oct 13 02:44:18 PDT 2015
v2: rename functions and simplify init
Signed-off-by: Karol Herbst <nouveau at karolherbst.de>
---
drm/nouveau/nvkm/subdev/pci/g84.c | 105 ++++++++++++++++++++++++++++++++++++
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, 136 insertions(+)
diff --git a/drm/nouveau/nvkm/subdev/pci/g84.c b/drm/nouveau/nvkm/subdev/pci/g84.c
index 3faa6bf..7a4e766 100644
--- a/drm/nouveau/nvkm/subdev/pci/g84.c
+++ b/drm/nouveau/nvkm/subdev/pci/g84.c
@@ -25,6 +25,94 @@
#include <core/pci.h>
+int
+g84_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;
+}
+
+int
+g84_pcie_version(struct nvkm_pci *pci)
+{
+ struct nvkm_device *device = pci->subdev.device;
+ return (nvkm_rd32(device, 0x00154c) & 0x1) + 1;
+}
+
+void
+g84_pcie_set_version(struct nvkm_pci *pci, u8 ver)
+{
+ struct nvkm_device *device = pci->subdev.device;
+ nvkm_mask(device, 0x00154c, 0x1, (ver >= 2 ? 0x1 : 0x0));
+}
+
+static void
+g84_pcie_set_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_pcie_cur_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_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_pcie_set_link_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_set_link(struct nvkm_pci *pci, enum nvkm_pcie_speed req_speed,
+ u8 req_width)
+{
+ if (req_speed == NVKM_PCIE_SPEED_5_0)
+ g84_pcie_set_cap_speed(pci, true);
+ else
+ g84_pcie_set_cap_speed(pci, false);
+
+ g84_pcie_set_link_speed(pci, req_speed);
+
+ return 0;
+}
+
void
g84_pci_init(struct nvkm_pci *pci)
{
@@ -48,6 +136,13 @@ g84_pci_init(struct nvkm_pci *pci)
nvkm_pci_mask(pci, 0x041c, 0x00000060, 0x00000000);
}
+int
+g84_pcie_init(struct nvkm_pci *pci)
+{
+ g84_pcie_set_cap_speed(pci, g84_pcie_cur_speed(pci) == NVKM_PCIE_SPEED_5_0);
+ return 0;
+}
+
static const struct nvkm_pci_func
g84_pci_func = {
.init = g84_pci_init,
@@ -55,6 +150,16 @@ g84_pci_func = {
.wr08 = nv40_pci_wr08,
.wr32 = nv40_pci_wr32,
.msi_rearm = nv46_pci_msi_rearm,
+
+ .pcie.init = g84_pcie_init,
+ .pcie.set_link = g84_pcie_set_link,
+
+ .pcie.max_speed = g84_pcie_max_speed,
+ .pcie.cur_speed = g84_pcie_cur_speed,
+
+ .pcie.set_version = g84_pcie_set_version,
+ .pcie.version = g84_pcie_version,
+ .pcie.version_supported = g84_pcie_version_supported,
};
int
diff --git a/drm/nouveau/nvkm/subdev/pci/g94.c b/drm/nouveau/nvkm/subdev/pci/g94.c
index cd311ee..f2f96c1 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.init = g84_pcie_init,
+ .pcie.set_link = g84_pcie_set_link,
+
+ .pcie.max_speed = g84_pcie_max_speed,
+ .pcie.cur_speed = g84_pcie_cur_speed,
+
+ .pcie.set_version = g84_pcie_set_version,
+ .pcie.version = g84_pcie_version,
+ .pcie.version_supported = g84_pcie_version_supported,
};
int
diff --git a/drm/nouveau/nvkm/subdev/pci/gf100.c b/drm/nouveau/nvkm/subdev/pci/gf100.c
index 25e1ae7..1ee43ad 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_pcie_max_speed,
+ .pcie.cur_speed = g84_pcie_cur_speed,
+
+ .pcie.version_supported = g84_pcie_version_supported,
};
int
diff --git a/drm/nouveau/nvkm/subdev/pci/gf106.c b/drm/nouveau/nvkm/subdev/pci/gf106.c
index 82d8c27..d72f850 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_pcie_max_speed,
+ .pcie.cur_speed = g84_pcie_cur_speed,
+
+ .pcie.version_supported = g84_pcie_version_supported,
};
int
diff --git a/drm/nouveau/nvkm/subdev/pci/gk104.c b/drm/nouveau/nvkm/subdev/pci/gk104.c
index 6119f89..af79d9b 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.cur_speed = g84_pcie_cur_speed,
};
int
diff --git a/drm/nouveau/nvkm/subdev/pci/priv.h b/drm/nouveau/nvkm/subdev/pci/priv.h
index 5370f0d..a504812 100644
--- a/drm/nouveau/nvkm/subdev/pci/priv.h
+++ b/drm/nouveau/nvkm/subdev/pci/priv.h
@@ -36,5 +36,14 @@ void nv46_pci_msi_rearm(struct nvkm_pci *);
void g84_pci_init(struct nvkm_pci *pci);
/* pcie functions */
+void g84_pcie_set_version(struct nvkm_pci *, u8);
+int g84_pcie_version(struct nvkm_pci *);
+int g84_pcie_version_supported(struct nvkm_pci *);
+void g84_pcie_set_link_speed(struct nvkm_pci *, enum nvkm_pcie_speed);
+enum nvkm_pcie_speed g84_pcie_cur_speed(struct nvkm_pci *);
+enum nvkm_pcie_speed g84_pcie_max_speed(struct nvkm_pci *);
+int g84_pcie_init(struct nvkm_pci *);
+int g84_pcie_set_link(struct nvkm_pci *, enum nvkm_pcie_speed, u8);
+
int nvkm_pcie_init(struct nvkm_pci *pci);
#endif
--
2.6.1
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