From: Christian Gmeiner <christian.gmeiner@gmail.com>
Date: Fri, 14 Aug 2020 09:05:03 +0000 (+0200)
Subject: drm/etnaviv: add total hi bandwidth perfcounter
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=bbab2be7e514268e4d90ee6497f53243bb61d51c;p=linux.git

drm/etnaviv: add total hi bandwidth perfcounter

These two perf counters represent the total read and write
GPU bandwidth in terms of 64bits.

The used sequence was taken from Vivante kernel driver.

Signed-off-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
---

diff --git a/drivers/gpu/drm/etnaviv/etnaviv_perfmon.c b/drivers/gpu/drm/etnaviv/etnaviv_perfmon.c
index 782732e6ce72d..b37459f022d76 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_perfmon.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_perfmon.c
@@ -69,6 +69,29 @@ static u32 pipe_perf_reg_read(struct etnaviv_gpu *gpu,
 	return value;
 }
 
+static u32 pipe_reg_read(struct etnaviv_gpu *gpu,
+	const struct etnaviv_pm_domain *domain,
+	const struct etnaviv_pm_signal *signal)
+{
+	u32 clock = gpu_read(gpu, VIVS_HI_CLOCK_CONTROL);
+	u32 value = 0;
+	unsigned i;
+
+	for (i = 0; i < gpu->identity.pixel_pipes; i++) {
+		clock &= ~(VIVS_HI_CLOCK_CONTROL_DEBUG_PIXEL_PIPE__MASK);
+		clock |= VIVS_HI_CLOCK_CONTROL_DEBUG_PIXEL_PIPE(i);
+		gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, clock);
+		value += gpu_read(gpu, signal->data);
+	}
+
+	/* switch back to pixel pipe 0 to prevent GPU hang */
+	clock &= ~(VIVS_HI_CLOCK_CONTROL_DEBUG_PIXEL_PIPE__MASK);
+	clock |= VIVS_HI_CLOCK_CONTROL_DEBUG_PIXEL_PIPE(0);
+	gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, clock);
+
+	return value;
+}
+
 static u32 hi_total_cycle_read(struct etnaviv_gpu *gpu,
 	const struct etnaviv_pm_domain *domain,
 	const struct etnaviv_pm_signal *signal)
@@ -102,8 +125,18 @@ static const struct etnaviv_pm_domain doms_3d[] = {
 		.name = "HI",
 		.profile_read = VIVS_MC_PROFILE_HI_READ,
 		.profile_config = VIVS_MC_PROFILE_CONFIG2,
-		.nr_signals = 5,
+		.nr_signals = 7,
 		.signal = (const struct etnaviv_pm_signal[]) {
+			{
+				"TOTAL_READ_BYTES8",
+				VIVS_HI_PROFILE_READ_BYTES8,
+				&pipe_reg_read,
+			},
+			{
+				"TOTAL_WRITE_BYTES8",
+				VIVS_HI_PROFILE_WRITE_BYTES8,
+				&pipe_reg_read,
+			},
 			{
 				"TOTAL_CYCLES",
 				0,