drm/nouveau/bios/perf: parse the pci speed from the bios for tesla and newer cards

Signed-off-by: Karol Herbst <nouveau@karolherbst.de>

2 files changed, 18 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/include/nvkm/subdev/bios/perf.h b/drivers/gpu/drm/nouveau/include/nvkm/subdev/bios/perf.h
index 7cc2becabc69..d3bd250103d5 100644
--- a/drivers/gpu/drm/nouveau/include/nvkm/subdev/bios/perf.h
+++ b/drivers/gpu/drm/nouveau/include/nvkm/subdev/bios/perf.h
@@ -13,6 +13,8 @@ struct nvbios_perfE {
         u32 vdec;
         u32 disp;
         u32 script;
+        u8  pcie_speed;
+        u8  pcie_width;
 };
 
 u16 nvbios_perf_entry(struct nvkm_bios *, int idx,
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/perf.c b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/perf.c
index aa7e33b42b30..636bfb665bb9 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/perf.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/perf.c
@@ -24,6 +24,7 @@
 #include <subdev/bios.h>
 #include <subdev/bios/bit.h>
 #include <subdev/bios/perf.h>
+#include <subdev/pci.h>
 
 u16
 nvbios_perf_table(struct nvkm_bios *bios, u8 *ver, u8 *hdr,
@@ -145,6 +146,21 @@ nvbios_perfEp(struct nvkm_bios *bios, int idx,
                 break;
         case 0x40:
                 info->voltage  = nvbios_rd08(bios, perf + 0x02);
+                switch (nvbios_rd08(bios, perf + 0xb) & 0x3) {
+                case 0:
+                        info->pcie_speed = NVKM_PCIE_SPEED_5_0;
+                        break;
+                case 3:
+                case 1:
+                        info->pcie_speed = NVKM_PCIE_SPEED_2_5;
+                        break;
+                case 2:
+                        info->pcie_speed = NVKM_PCIE_SPEED_8_0;
+                        break;
+                default:
+                        break;
+                }
+                info->pcie_width = 0xff;
                 break;
         default:
                 return 0x0000;