[PATCH v6 4/4] media: venus: Update core selection

Aniket Masule
2019-07-22T09:08:04Z

Present core assignment is static. Introduced load balancing
across the cores. Load on earch core is calculated and core
with minimum load is assigned to given instance.

Signed-off-by: Aniket Masule <amasule@codeaurora.org>
---
drivers/media/platform/qcom/venus/helpers.c | 69 +++++++++++++++++++++++---
drivers/media/platform/qcom/venus/helpers.h | 2 +-
drivers/media/platform/qcom/venus/hfi_helper.h | 1 +
drivers/media/platform/qcom/venus/hfi_parser.h | 5 ++
drivers/media/platform/qcom/venus/vdec.c | 2 +-
drivers/media/platform/qcom/venus/venc.c | 2 +-
6 files changed, 72 insertions(+), 9 deletions(-)

diff --git a/drivers/media/platform/qcom/venus/helpers.c b/drivers/media/platform/qcom/venus/helpers.c
index edf403d..3b6cbbf 100644
--- a/drivers/media/platform/qcom/venus/helpers.c
+++ b/drivers/media/platform/qcom/venus/helpers.c
@@ -26,6 +26,7 @@
#include "helpers.h"
#include "hfi_helper.h"
#include "hfi_venus_io.h"
+#include "hfi_parser.h"

struct intbuf {
struct list_head list;
@@ -331,6 +332,24 @@ static u32 load_per_instance(struct venus_inst *inst)
return mbs * inst->fps;
}

+static u32 load_per_core(struct venus_core *core, u32 core_id)
+{
+ struct venus_inst *inst = NULL;
+ u32 mbs_per_sec = 0, load = 0;
+
+ mutex_lock(&core->lock);
+ list_for_each_entry(inst, &core->instances, list) {
+ if (inst->clk_data.core_id != core_id)
+ continue;
+
+ mbs_per_sec = load_per_instance(inst);
+ load += mbs_per_sec * inst->clk_data.codec_freq_data->vpp_freq;
+ }
+ mutex_unlock(&core->lock);
+
+ return load;
+}
+
static u32 load_per_type(struct venus_core *core, u32 session_type)
{
struct venus_inst *inst = NULL;
@@ -505,6 +524,16 @@ static int load_scale_clocks(struct venus_inst *inst)
return scale_clocks(inst);
}

+int set_core_usage(struct venus_inst *inst, u32 usage)
+{
+ const u32 ptype = HFI_PROPERTY_CONFIG_VIDEOCORES_USAGE;
+ struct hfi_videocores_usage_type cu;
+
+ cu.video_core_enable_mask = usage;
+
+ return hfi_session_set_property(inst, ptype, &cu);
+}
+
static void fill_buffer_desc(const struct venus_buffer *buf,
struct hfi_buffer_desc *bd, bool response)
{
@@ -808,19 +837,47 @@ int venus_helper_set_work_mode(struct venus_inst *inst, u32 mode)
}
EXPORT_SYMBOL_GPL(venus_helper_set_work_mode);

-int venus_helper_set_core_usage(struct venus_inst *inst, u32 usage)
+int venus_helper_set_core(struct venus_inst *inst)
{
- const u32 ptype = HFI_PROPERTY_CONFIG_VIDEOCORES_USAGE;
- struct hfi_videocores_usage_type cu;
+ struct venus_core *core = inst->core;
+ u32 min_core_id = 0, core1_load = 0, core2_load = 0;
+ unsigned long min_load, max_freq, cur_inst_load;
+ u32 cores_max;
+ int ret;

if (!IS_V4(inst->core))
return 0;

- cu.video_core_enable_mask = usage;
+ core1_load = load_per_core(core, VIDC_CORE_ID_1);
+ core2_load = load_per_core(core, VIDC_CORE_ID_2);
+ min_core_id = core1_load < core2_load ? VIDC_CORE_ID_1 : VIDC_CORE_ID_2;
+ min_load = min(core1_load, core2_load);
+ cores_max = core_num_max(inst);

- return hfi_session_set_property(inst, ptype, &cu);
+ if (cores_max < VIDC_CORE_ID_2) {
+ min_core_id = VIDC_CORE_ID_1;
+ min_load = core1_load;
+ }
+
+ cur_inst_load = load_per_instance(inst) *
+ inst->clk_data.codec_freq_data->vpp_freq;
+ max_freq = core->res->freq_tbl[0].freq;
+
+ if ((cur_inst_load + min_load) > max_freq) {
+ dev_warn(core->dev, "HW is overloaded, needed: %lu max: %lu\n",
+ cur_inst_load, max_freq);
+ return -EINVAL;
+ }
+
+ ret = set_core_usage(inst, min_core_id);
+ if (ret)
+ return ret;
+
+ inst->clk_data.core_id = min_core_id;
+
+ return 0;
}
-EXPORT_SYMBOL_GPL(venus_helper_set_core_usage);
+EXPORT_SYMBOL_GPL(venus_helper_set_core);

int venus_helper_init_codec_freq_data(struct venus_inst *inst)
{
diff --git a/drivers/media/platform/qcom/venus/helpers.h b/drivers/media/platform/qcom/venus/helpers.h
index 2c13245..1034111 100644
--- a/drivers/media/platform/qcom/venus/helpers.h
+++ b/drivers/media/platform/qcom/venus/helpers.h
@@ -42,7 +42,7 @@ int venus_helper_set_output_resolution(struct venus_inst *inst,
u32 buftype);
int venus_helper_set_work_mode(struct venus_inst *inst, u32 mode);
int venus_helper_init_codec_freq_data(struct venus_inst *inst);
-int venus_helper_set_core_usage(struct venus_inst *inst, u32 usage);
+int venus_helper_set_core(struct venus_inst *inst);
int venus_helper_set_num_bufs(struct venus_inst *inst, unsigned int input_bufs,
unsigned int output_bufs,
unsigned int output2_bufs);
diff --git a/drivers/media/platform/qcom/venus/hfi_helper.h b/drivers/media/platform/qcom/venus/hfi_helper.h
index 34ea503..f3d1018 100644
--- a/drivers/media/platform/qcom/venus/hfi_helper.h
+++ b/drivers/media/platform/qcom/venus/hfi_helper.h
@@ -559,6 +559,7 @@ struct hfi_bitrate {
#define HFI_CAPABILITY_LCU_SIZE 0x14
#define HFI_CAPABILITY_HIER_P_HYBRID_NUM_ENH_LAYERS 0x15
#define HFI_CAPABILITY_MBS_PER_SECOND_POWERSAVE 0x16
+#define HFI_CAPABILITY_MAX_VIDEOCORES 0x2B

struct hfi_capability {
u32 capability_type;
diff --git a/drivers/media/platform/qcom/venus/hfi_parser.h b/drivers/media/platform/qcom/venus/hfi_parser.h
index 3e931c7..264e6dd 100644
--- a/drivers/media/platform/qcom/venus/hfi_parser.h
+++ b/drivers/media/platform/qcom/venus/hfi_parser.h
@@ -107,4 +107,9 @@ static inline u32 frate_step(struct venus_inst *inst)
return cap_step(inst, HFI_CAPABILITY_FRAMERATE);
}

+static inline u32 core_num_max(struct venus_inst *inst)
+{
+ return cap_max(inst, HFI_CAPABILITY_MAX_VIDEOCORES);
+}
+
#endif
diff --git a/drivers/media/platform/qcom/venus/vdec.c b/drivers/media/platform/qcom/venus/vdec.c
index d037f80..620e060 100644
--- a/drivers/media/platform/qcom/venus/vdec.c
+++ b/drivers/media/platform/qcom/venus/vdec.c
@@ -551,7 +551,7 @@ static int vdec_output_conf(struct venus_inst *inst)
if (ret)
return ret;

- ret = venus_helper_set_core_usage(inst, VIDC_CORE_ID_1);
+ ret = venus_helper_set_core(inst);
if (ret)
return ret;

diff --git a/drivers/media/platform/qcom/venus/venc.c b/drivers/media/platform/qcom/venus/venc.c
index cdddc82..28e76cc 100644
--- a/drivers/media/platform/qcom/venus/venc.c
+++ b/drivers/media/platform/qcom/venus/venc.c
@@ -660,7 +660,7 @@ static int venc_set_properties(struct venus_inst *inst)
if (ret)
return ret;

- ret = venus_helper_set_core_usage(inst, VIDC_CORE_ID_2);
+ ret = venus_helper_set_core(inst);
if (ret)
return ret;

--
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