On 3/27/2023 12:54 PM, Wenyou Yang wrote:
When the CPU SMT status is changed in the fly, sent the SMT enable
message to pmfw to notify it that the SMT status changed.
Signed-off-by: Wenyou Yang <WenYou.Yang@xxxxxxx>
---
drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c | 39 +++++++++++++++++++
drivers/gpu/drm/amd/pm/swsmu/inc/amdgpu_smu.h | 7 ++++
2 files changed, 46 insertions(+)
diff --git a/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c b/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
index b5d64749990e..eb4c49f38292 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
@@ -22,6 +22,7 @@
#define SWSMU_CODE_LAYER_L1
+#include <linux/cpu.h>
#include <linux/firmware.h>
#include <linux/pci.h>
@@ -54,6 +55,8 @@
#undef pr_info
#undef pr_debug
+extern struct raw_notifier_head smt_notifier_head;
+
static const struct amd_pm_funcs swsmu_pm_funcs;
static int smu_force_smuclk_levels(struct smu_context *smu,
enum smu_clk_type clk_type,
@@ -69,6 +72,9 @@ static int smu_set_fan_speed_rpm(void *handle, uint32_t speed);
static int smu_set_gfx_cgpg(struct smu_context *smu, bool enabled);
static int smu_set_mp1_state(void *handle, enum pp_mp1_state mp1_state);
+static int smt_notifier_callback(struct notifier_block *nb,
+ unsigned long action, void *data);
+
static int smu_sys_get_pp_feature_mask(void *handle,
char *buf)
{
@@ -647,6 +653,8 @@ static int smu_early_init(void *handle)
adev->powerplay.pp_handle = smu;
adev->powerplay.pp_funcs = &swsmu_pm_funcs;
+ smu->nb.notifier_call = smt_notifier_callback;
+
r = smu_set_funcs(adev);
if (r)
return r;
@@ -1105,6 +1113,8 @@ static int smu_sw_init(void *handle)
if (!smu->ppt_funcs->get_fan_control_mode)
smu->adev->pm.no_fan = true;
+ raw_notifier_chain_register(&smt_notifier_head, &smu->nb);
+
As mentioned before, it's not a blind registration for any ASIC. This
should only be done by the ASICs which are interested in the
notification and not here. So this should be somewhere inside
vangogh_set_ppt_funcs or part of a software init callback like
vangogh_init_smc_tables.
Thanks,
Lijo
return 0;
}
@@ -1122,6 +1132,9 @@ static int smu_sw_fini(void *handle)
smu_fini_microcode(smu);
+ if (smu->nb.notifier_call != NULL)
+ raw_notifier_chain_unregister(&smt_notifier_head, &smu->nb);
+
return 0;
}
@@ -3241,3 +3254,29 @@ int smu_send_hbm_bad_channel_flag(struct smu_context *smu, uint32_t size)
return ret;
}
+
+static int smu_set_cpu_smt_enable(struct smu_context *smu, bool enable)
+{
+ int ret = -EINVAL;
+
+ if (smu->ppt_funcs && smu->ppt_funcs->set_cpu_smt_enable)
+ ret = smu->ppt_funcs->set_cpu_smt_enable(smu, enable);
+
+ return ret;
+}
+
+static int smt_notifier_callback(struct notifier_block *nb,
+ unsigned long action, void *data)
+{
+ struct smu_context *smu = container_of(nb, struct smu_context, nb);
+ int ret;
+
+ smu = container_of(nb, struct smu_context, nb);
+
+ ret = smu_set_cpu_smt_enable(smu, action == SMT_ENABLED);
+
+ dev_dbg(smu->adev->dev, "failed to set cclk_pd_limit for SMT %sabled: %d\n",
+ action == SMT_ENABLED ? "en" : "dis", ret);
+
+ return ret ? NOTIFY_BAD : NOTIFY_OK;
+}
diff --git a/drivers/gpu/drm/amd/pm/swsmu/inc/amdgpu_smu.h b/drivers/gpu/drm/amd/pm/swsmu/inc/amdgpu_smu.h
index 09469c750a96..4d51ac5ec8ba 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/inc/amdgpu_smu.h
+++ b/drivers/gpu/drm/amd/pm/swsmu/inc/amdgpu_smu.h
@@ -566,6 +566,8 @@ struct smu_context
struct firmware pptable_firmware;
+ struct notifier_block nb;
+
u32 param_reg;
u32 msg_reg;
u32 resp_reg;
@@ -1354,6 +1356,11 @@ struct pptable_funcs {
* @init_pptable_microcode: Prepare the pptable microcode to upload via PSP
*/
int (*init_pptable_microcode)(struct smu_context *smu);
+
+ /**
+ * @set_cpu_smt_enable: Set the CPU SMT status.
+ */
+ int (*set_cpu_smt_enable)(struct smu_context *smu, bool smt_enable);
};
typedef enum {
