4 files changed, 31 insertions, 2 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/gk20a.c b/drivers/gpu/nvgpu/gk20a/gk20a.c
index ff87edc2..c61b47c5 100644
--- a/drivers/gpu/nvgpu/gk20a/gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/gk20a.c
@@ -1040,6 +1040,21 @@ int gk20a_pm_finalize_poweron(struct device *dev)
         if (g->irq_stall != g->irq_nonstall)
                 enable_irq(g->irq_nonstall);
 
+        if (g->ops.xve.available_speeds) {
+                u32 speed;
+
+                g->ops.xve.sw_init(dev);
+                g->ops.xve.available_speeds(g, &speed);
+
+                /* Set to max speed */
+                speed = 1 << (fls(speed) - 1);
+                err = g->ops.xve.set_speed(g, speed);
+                if (err) {
+                        gk20a_err(dev, "Failed to set PCIe bus speed!\n");
+                        goto done;
+                }
+        }
+
 done:
         return err;
 }
diff --git a/drivers/gpu/nvgpu/gk20a/gk20a.h b/drivers/gpu/nvgpu/gk20a/gk20a.h
index d51fdea1..75b96f42 100644
--- a/drivers/gpu/nvgpu/gk20a/gk20a.h
+++ b/drivers/gpu/nvgpu/gk20a/gk20a.h
@@ -703,6 +703,14 @@ struct gpu_ops {
                                 struct gk20a_cs_snapshot_client *client);
         } css;
 #endif
+        struct {
+                int (*sw_init)(struct device *dev);
+                int (*get_speed)(struct gk20a *g, u32 *xve_link_speed);
+                int (*set_speed)(struct gk20a *g, u32 xve_link_speed);
+                void (*available_speeds)(struct gk20a *g, u32 *speed_mask);
+                u32 (*xve_readl)(struct gk20a *g, u32 reg);
+                void (*xve_writel)(struct gk20a *g, u32 reg, u32 val);
+        } xve;
 };
 
 struct nvgpu_bios_ucode {
@@ -818,7 +826,7 @@ struct gk20a {
         struct dentry *debugfs_timeslice_medium_priority_us;
         struct dentry *debugfs_timeslice_high_priority_us;
         struct dentry *debugfs_runlist_interleave;
-
+        struct dentry *debugfs_xve;
 #endif
         struct gk20a_ctxsw_ucode_info ctxsw_ucode_info;
 
@@ -937,6 +945,10 @@ struct gk20a {
         u16 pci_subsystem_vendor_id, pci_subsystem_device_id;
         u16 pci_class;
         u8 pci_revision;
+
+        /* PCIe power states. */
+        bool xve_l0s;
+        bool xve_l1;
 };
 
 static inline unsigned long gk20a_get_gr_idle_timeout(struct gk20a *g)
@@ -1011,6 +1023,7 @@ enum gk20a_dbg_categories {
         gpu_dbg_sema    = BIT(15), /* semaphore debugging */
         gpu_dbg_sema_v  = BIT(16), /* verbose semaphore debugging */
         gpu_dbg_pmu_pstate = BIT(17), /* p state controlled by pmu */
+        gpu_dbg_xv      = BIT(18), /* XVE debugging */
         gpu_dbg_mem     = BIT(31), /* memory accesses, very verbose */
 };
 
diff --git a/drivers/gpu/nvgpu/gm206/bios_gm206.c b/drivers/gpu/nvgpu/gm206/bios_gm206.c
index 7b6a50d0..8693912e 100644
--- a/drivers/gpu/nvgpu/gm206/bios_gm206.c
+++ b/drivers/gpu/nvgpu/gm206/bios_gm206.c
@@ -29,7 +29,6 @@
 #define BIT_HEADER_ID 0xb8ff
 #define BIT_HEADER_SIGNATURE 0x00544942
 #define BIOS_SIZE 0x40000
-#define NV_PCFG 0x88000
 #define PCI_EXP_ROM_SIG 0xaa55
 #define PCI_EXP_ROM_SIG_NV 0x4e56
 #define ROM_FILE_PAYLOAD_OFFSET 0xa00
diff --git a/drivers/gpu/nvgpu/gm206/bios_gm206.h b/drivers/gpu/nvgpu/gm206/bios_gm206.h
index 5aa20364..1ee4e14c 100644
--- a/drivers/gpu/nvgpu/gm206/bios_gm206.h
+++ b/drivers/gpu/nvgpu/gm206/bios_gm206.h
@@ -17,6 +17,8 @@
 #define PERF_PTRS_WIDTH 0x4
 #define PERF_PTRS_WIDTH_16 0x2
 
+#define NV_PCFG 0x88000
+
 enum {
         CLOCKS_TABLE = 2,
         CLOCK_PROGRAMMING_TABLE,