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Date:   Sun,  9 Aug 2020 14:53:37 +0300
From:   Oded Gabbay <oded.gabbay@...il.com>
To:     linux-kernel@...r.kernel.org, SW_Drivers@...ana.ai
Subject: [PATCH 4/4] habanalabs: set max power according to card type

In Gaudi, the default max power setting is different between PCI and PMC
cards. Therefore, the driver need to set the default after knowing what is
the card type.

The current code has a bug where it limits the maximum power of the PMC
card to 200W after a reset occurs.

Signed-off-by: Oded Gabbay <oded.gabbay@...il.com>
---
 drivers/misc/habanalabs/common/device.c     | 7 ++++++-
 drivers/misc/habanalabs/common/habanalabs.h | 2 +-
 drivers/misc/habanalabs/common/sysfs.c      | 7 ++++---
 drivers/misc/habanalabs/gaudi/gaudi.c       | 9 ++++++++-
 drivers/misc/habanalabs/gaudi/gaudiP.h      | 3 ++-
 5 files changed, 21 insertions(+), 7 deletions(-)

diff --git a/drivers/misc/habanalabs/common/device.c b/drivers/misc/habanalabs/common/device.c
index be16b75bdfdb..8e34c39380a9 100644
--- a/drivers/misc/habanalabs/common/device.c
+++ b/drivers/misc/habanalabs/common/device.c
@@ -1069,7 +1069,7 @@ int hl_device_reset(struct hl_device *hdev, bool hard_reset,
 			goto out_err;
 		}
 
-		hl_set_max_power(hdev, hdev->max_power);
+		hl_set_max_power(hdev);
 	} else {
 		rc = hdev->asic_funcs->soft_reset_late_init(hdev);
 		if (rc) {
@@ -1318,6 +1318,11 @@ int hl_device_init(struct hl_device *hdev, struct class *hclass)
 		goto out_disabled;
 	}
 
+	/* Need to call this again because the max power might change,
+	 * depending on card type for certain ASICs
+	 */
+	hl_set_max_power(hdev);
+
 	/*
 	 * hl_hwmon_init() must be called after device_late_init(), because only
 	 * there we get the information from the device about which
diff --git a/drivers/misc/habanalabs/common/habanalabs.h b/drivers/misc/habanalabs/common/habanalabs.h
index 13c18f3d9a9b..5864c6adfc52 100644
--- a/drivers/misc/habanalabs/common/habanalabs.h
+++ b/drivers/misc/habanalabs/common/habanalabs.h
@@ -1858,7 +1858,7 @@ int hl_get_pwm_info(struct hl_device *hdev,
 void hl_set_pwm_info(struct hl_device *hdev, int sensor_index, u32 attr,
 			long value);
 u64 hl_get_max_power(struct hl_device *hdev);
-void hl_set_max_power(struct hl_device *hdev, u64 value);
+void hl_set_max_power(struct hl_device *hdev);
 int hl_set_voltage(struct hl_device *hdev,
 			int sensor_index, u32 attr, long value);
 int hl_set_current(struct hl_device *hdev,
diff --git a/drivers/misc/habanalabs/common/sysfs.c b/drivers/misc/habanalabs/common/sysfs.c
index b3cb0ac4721c..5ae484cc84cd 100644
--- a/drivers/misc/habanalabs/common/sysfs.c
+++ b/drivers/misc/habanalabs/common/sysfs.c
@@ -81,7 +81,7 @@ u64 hl_get_max_power(struct hl_device *hdev)
 	return result;
 }
 
-void hl_set_max_power(struct hl_device *hdev, u64 value)
+void hl_set_max_power(struct hl_device *hdev)
 {
 	struct armcp_packet pkt;
 	int rc;
@@ -90,7 +90,7 @@ void hl_set_max_power(struct hl_device *hdev, u64 value)
 
 	pkt.ctl = cpu_to_le32(ARMCP_PACKET_MAX_POWER_SET <<
 				ARMCP_PKT_CTL_OPCODE_SHIFT);
-	pkt.value = cpu_to_le64(value);
+	pkt.value = cpu_to_le64(hdev->max_power);
 
 	rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt),
 						0, NULL);
@@ -316,7 +316,7 @@ static ssize_t max_power_store(struct device *dev,
 	}
 
 	hdev->max_power = value;
-	hl_set_max_power(hdev, value);
+	hl_set_max_power(hdev);
 
 out:
 	return count;
@@ -422,6 +422,7 @@ int hl_sysfs_init(struct hl_device *hdev)
 		hdev->pm_mng_profile = PM_AUTO;
 	else
 		hdev->pm_mng_profile = PM_MANUAL;
+
 	hdev->max_power = hdev->asic_prop.max_power_default;
 
 	hdev->asic_funcs->add_device_attr(hdev, &hl_dev_clks_attr_group);
diff --git a/drivers/misc/habanalabs/gaudi/gaudi.c b/drivers/misc/habanalabs/gaudi/gaudi.c
index 7e0f9f64ffcb..c58343608cc7 100644
--- a/drivers/misc/habanalabs/gaudi/gaudi.c
+++ b/drivers/misc/habanalabs/gaudi/gaudi.c
@@ -456,7 +456,7 @@ static int gaudi_get_fixed_properties(struct hl_device *hdev)
 	prop->num_of_events = GAUDI_EVENT_SIZE;
 	prop->tpc_enabled_mask = TPC_ENABLED_MASK;
 
-	prop->max_power_default = MAX_POWER_DEFAULT;
+	prop->max_power_default = MAX_POWER_DEFAULT_PMC;
 
 	prop->cb_pool_cb_cnt = GAUDI_CB_POOL_CB_CNT;
 	prop->cb_pool_cb_size = GAUDI_CB_POOL_CB_SIZE;
@@ -6055,6 +6055,13 @@ static int gaudi_armcp_info_get(struct hl_device *hdev)
 		strncpy(prop->armcp_info.card_name, GAUDI_DEFAULT_CARD_NAME,
 				CARD_NAME_MAX_LEN);
 
+	if (prop->armcp_info.card_type == armcp_card_type_pci)
+		prop->max_power_default = MAX_POWER_DEFAULT_PCI;
+	else if (prop->armcp_info.card_type == armcp_card_type_pmc)
+		prop->max_power_default = MAX_POWER_DEFAULT_PMC;
+
+	hdev->max_power = prop->max_power_default;
+
 	return 0;
 }
 
diff --git a/drivers/misc/habanalabs/gaudi/gaudiP.h b/drivers/misc/habanalabs/gaudi/gaudiP.h
index 5dc99f6f0296..182eaf6193a3 100644
--- a/drivers/misc/habanalabs/gaudi/gaudiP.h
+++ b/drivers/misc/habanalabs/gaudi/gaudiP.h
@@ -41,7 +41,8 @@
 
 #define GAUDI_MAX_CLK_FREQ		2200000000ull	/* 2200 MHz */
 
-#define MAX_POWER_DEFAULT		200000		/* 200W */
+#define MAX_POWER_DEFAULT_PCI		200000		/* 200W */
+#define MAX_POWER_DEFAULT_PMC		200000		/* 350W */
 
 #define GAUDI_CPU_TIMEOUT_USEC		15000000	/* 15s */
 
-- 
2.17.1

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