gpu: nvgpu: enable PCI MSI interrupts

Use MSI interrupts instead of legacy on PCIe
dGPUs to reduce latency and contention with other
PCIe devices

JIRA EVLR-986

Change-Id: I6cecc7e62e5797860d42a5bee21e8f4f664e1b18
Signed-off-by: David Nieto <dmartineznie@nvidia.com>
Reviewed-on: http://git-master/r/1291758
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/gk20a.h b/drivers/gpu/nvgpu/gk20a/gk20a.h
index 19fa4e26..72f9170e 100644
--- a/drivers/gpu/nvgpu/gk20a/gk20a.h
+++ b/drivers/gpu/nvgpu/gk20a/gk20a.h
@@ -780,6 +780,9 @@ struct gpu_ops {
                 void (*xve_writel)(struct gk20a *g, u32 reg, u32 val);
                 void (*disable_aspm)(struct gk20a *g);
                 void (*reset_gpu)(struct gk20a *g);
+#if defined(CONFIG_PCI_MSI)
+                void (*rearm_msi)(struct gk20a *g);
+#endif
         } xve;
 };
 
@@ -1037,6 +1040,11 @@ struct gk20a {
 
         /* Current warning temp in sfxp24.8 */
         s32 curr_warn_temp;
+
+#if defined(CONFIG_PCI_MSI)
+        /* Check if msi is enabled */
+        bool msi_enabled;
+#endif
 };
 
 static inline unsigned long gk20a_get_gr_idle_timeout(struct gk20a *g)