habanalabs: calculate trace frequency from PLL

The profiler needs to know the PLL values for correctly showing the
profiling data. Because our firmware can use different PLL configurations,
we need to read the PLL values from the ASIC to pass them to the profiler.
Signed-off-by: Adam Aharon <aaharon@habana.ai>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>

drivers/misc/habanalabs/gaudi/gaudi.c

@@ -555,11 +555,36 @@ static int gaudi_early_fini(struct hl_device *hdev)
 static void gaudi_fetch_psoc_frequency(struct hl_device *hdev)
 {
 	struct asic_fixed_properties *prop = &hdev->asic_prop;
+	u32 trace_freq = 0;
+	u32 pll_clk = 0;
+	u32 div_fctr = RREG32(mmPSOC_CPU_PLL_DIV_FACTOR_2);
+	u32 div_sel = RREG32(mmPSOC_CPU_PLL_DIV_SEL_2);
+	u32 nr = RREG32(mmPSOC_CPU_PLL_NR);
+	u32 nf = RREG32(mmPSOC_CPU_PLL_NF);
+	u32 od = RREG32(mmPSOC_CPU_PLL_OD);
+
+	if (div_sel == DIV_SEL_REF_CLK || div_sel == DIV_SEL_DIVIDED_REF) {
+		if (div_sel == DIV_SEL_REF_CLK)
+			trace_freq = PLL_REF_CLK;
+		else
+			trace_freq = PLL_REF_CLK / (div_fctr + 1);
+	} else if (div_sel == DIV_SEL_PLL_CLK ||
+					div_sel == DIV_SEL_DIVIDED_PLL) {
+		pll_clk = PLL_REF_CLK * (nf + 1) / ((nr + 1) * (od + 1));
+		if (div_sel == DIV_SEL_PLL_CLK)
+			trace_freq = pll_clk;
+		else
+			trace_freq = pll_clk / (div_fctr + 1);
+	} else {
+		dev_warn(hdev->dev,
+			"Received invalid div select value: %d", div_sel);
+	}
 
-	prop->psoc_pci_pll_nr = RREG32(mmPSOC_PCI_PLL_NR);
-	prop->psoc_pci_pll_nf = RREG32(mmPSOC_PCI_PLL_NF);
-	prop->psoc_pci_pll_od = RREG32(mmPSOC_PCI_PLL_OD);
-	prop->psoc_pci_pll_div_factor = RREG32(mmPSOC_PCI_PLL_DIV_FACTOR_1);
+	prop->psoc_timestamp_frequency = trace_freq;
+	prop->psoc_pci_pll_nr = nr;
+	prop->psoc_pci_pll_nf = nf;
+	prop->psoc_pci_pll_od = od;
+	prop->psoc_pci_pll_div_factor = div_fctr;
 }
 
 static int _gaudi_init_tpc_mem(struct hl_device *hdev,

drivers/misc/habanalabs/gaudi/gaudi_coresight.c

@@ -392,6 +392,7 @@ static int gaudi_config_stm(struct hl_device *hdev,
 {
 	struct hl_debug_params_stm *input;
 	u64 base_reg;
+	u32 frequency;
 	int rc;
 
 	if (params->reg_idx >= ARRAY_SIZE(debug_stm_regs)) {
@@ -420,7 +421,10 @@ static int gaudi_config_stm(struct hl_device *hdev,
 		WREG32(base_reg + 0xE00, lower_32_bits(input->sp_mask));
 		WREG32(base_reg + 0xEF4, input->id);
 		WREG32(base_reg + 0xDF4, 0x80);
-		WREG32(base_reg + 0xE8C, input->frequency);
+		frequency = hdev->asic_prop.psoc_timestamp_frequency;
+		if (frequency == 0)
+			frequency = input->frequency;
+		WREG32(base_reg + 0xE8C, frequency);
 		WREG32(base_reg + 0xE90, 0x7FF);
 
 		/* SW-2176 - SW WA for HW bug */

drivers/misc/habanalabs/goya/goya.c

@@ -594,11 +594,36 @@ static void goya_qman0_set_security(struct hl_device *hdev, bool secure)
 static void goya_fetch_psoc_frequency(struct hl_device *hdev)
 {
 	struct asic_fixed_properties *prop = &hdev->asic_prop;
+	u32 trace_freq = 0;
+	u32 pll_clk = 0;
+	u32 div_fctr = RREG32(mmPSOC_PCI_PLL_DIV_FACTOR_1);
+	u32 div_sel = RREG32(mmPSOC_PCI_PLL_DIV_SEL_1);
+	u32 nr = RREG32(mmPSOC_PCI_PLL_NR);
+	u32 nf = RREG32(mmPSOC_PCI_PLL_NF);
+	u32 od = RREG32(mmPSOC_PCI_PLL_OD);
+
+	if (div_sel == DIV_SEL_REF_CLK || div_sel == DIV_SEL_DIVIDED_REF) {
+		if (div_sel == DIV_SEL_REF_CLK)
+			trace_freq = PLL_REF_CLK;
+		else
+			trace_freq = PLL_REF_CLK / (div_fctr + 1);
+	} else if (div_sel == DIV_SEL_PLL_CLK ||
+					div_sel == DIV_SEL_DIVIDED_PLL) {
+		pll_clk = PLL_REF_CLK * (nf + 1) / ((nr + 1) * (od + 1));
+		if (div_sel == DIV_SEL_PLL_CLK)
+			trace_freq = pll_clk;
+		else
+			trace_freq = pll_clk / (div_fctr + 1);
+	} else {
+		dev_warn(hdev->dev,
+			"Received invalid div select value: %d", div_sel);
+	}
 
-	prop->psoc_pci_pll_nr = RREG32(mmPSOC_PCI_PLL_NR);
-	prop->psoc_pci_pll_nf = RREG32(mmPSOC_PCI_PLL_NF);
-	prop->psoc_pci_pll_od = RREG32(mmPSOC_PCI_PLL_OD);
-	prop->psoc_pci_pll_div_factor = RREG32(mmPSOC_PCI_PLL_DIV_FACTOR_1);
+	prop->psoc_timestamp_frequency = trace_freq;
+	prop->psoc_pci_pll_nr = nr;
+	prop->psoc_pci_pll_nf = nf;
+	prop->psoc_pci_pll_od = od;
+	prop->psoc_pci_pll_div_factor = div_fctr;
 }
 
 int goya_late_init(struct hl_device *hdev)

drivers/misc/habanalabs/goya/goya_coresight.c

@@ -232,6 +232,7 @@ static int goya_config_stm(struct hl_device *hdev,
 {
 	struct hl_debug_params_stm *input;
 	u64 base_reg;
+	u32 frequency;
 	int rc;
 
 	if (params->reg_idx >= ARRAY_SIZE(debug_stm_regs)) {
@@ -264,7 +265,10 @@ static int goya_config_stm(struct hl_device *hdev,
 		WREG32(base_reg + 0xE20, 0xFFFFFFFF);
 		WREG32(base_reg + 0xEF4, input->id);
 		WREG32(base_reg + 0xDF4, 0x80);
-		WREG32(base_reg + 0xE8C, input->frequency);
+		frequency = hdev->asic_prop.psoc_timestamp_frequency;
+		if (frequency == 0)
+			frequency = input->frequency;
+		WREG32(base_reg + 0xE8C, frequency);
 		WREG32(base_reg + 0xE90, 0x7FF);
 		WREG32(base_reg + 0xE80, 0x27 | (input->id << 16));
 	} else {

drivers/misc/habanalabs/habanalabs.h

@@ -247,6 +247,7 @@ struct hl_mmu_properties {
  * @psoc_pci_pll_nf: PCI PLL NF value.
  * @psoc_pci_pll_od: PCI PLL OD value.
  * @psoc_pci_pll_div_factor: PCI PLL DIV FACTOR 1 value.
+ * @psoc_timestamp_frequency: frequency of the psoc timestamp clock.
  * @high_pll: high PLL frequency used by the device.
  * @cb_pool_cb_cnt: number of CBs in the CB pool.
  * @cb_pool_cb_size: size of each CB in the CB pool.
@@ -291,6 +292,7 @@ struct asic_fixed_properties {
 	u32				psoc_pci_pll_nf;
 	u32				psoc_pci_pll_od;
 	u32				psoc_pci_pll_div_factor;
+	u32				psoc_timestamp_frequency;
 	u32				high_pll;
 	u32				cb_pool_cb_cnt;
 	u32				cb_pool_cb_size;
@@ -533,6 +535,15 @@ enum hl_pll_frequency {
 	PLL_LAST
 };
 
+#define PLL_REF_CLK 50
+
+enum div_select_defs {
+	DIV_SEL_REF_CLK = 0,
+	DIV_SEL_PLL_CLK = 1,
+	DIV_SEL_DIVIDED_REF = 2,
+	DIV_SEL_DIVIDED_PLL = 3,
+};
+
 /**
  * struct hl_asic_funcs - ASIC specific functions that are can be called from
  *                        common code.

drivers/misc/habanalabs/include/gaudi/asic_reg/gaudi_regs.h

@@ -91,6 +91,7 @@
 
 #include "psoc_pci_pll_regs.h"
 #include "psoc_hbm_pll_regs.h"
+#include "psoc_cpu_pll_regs.h"
 
 #define GAUDI_ECC_MEM_SEL_OFFSET	0xF18
 #define GAUDI_ECC_ADDRESS_OFFSET	0xF1C

drivers/misc/habanalabs/include/gaudi/asic_reg/psoc_cpu_pll_regs.h

+/* SPDX-License-Identifier: GPL-2.0
+ *
+ * Copyright 2016-2018 HabanaLabs, Ltd.
+ * All Rights Reserved.
+ *
+ */
+
+/************************************
+ ** This is an auto-generated file **
+ **       DO NOT EDIT BELOW        **
+ ************************************/
+
+#ifndef ASIC_REG_PSOC_CPU_PLL_REGS_H_
+#define ASIC_REG_PSOC_CPU_PLL_REGS_H_
+
+/*
+ *****************************************
+ *   PSOC_CPU_PLL (Prototype: PLL)
+ *****************************************
+ */
+
+#define mmPSOC_CPU_PLL_NR                                            0xC70100
+
+#define mmPSOC_CPU_PLL_NF                                            0xC70104
+
+#define mmPSOC_CPU_PLL_OD                                            0xC70108
+
+#define mmPSOC_CPU_PLL_NB                                            0xC7010C
+
+#define mmPSOC_CPU_PLL_CFG                                           0xC70110
+
+#define mmPSOC_CPU_PLL_LOSE_MASK                                     0xC70120
+
+#define mmPSOC_CPU_PLL_LOCK_INTR                                     0xC70128
+
+#define mmPSOC_CPU_PLL_LOCK_BYPASS                                   0xC7012C
+
+#define mmPSOC_CPU_PLL_DATA_CHNG                                     0xC70130
+
+#define mmPSOC_CPU_PLL_RST                                           0xC70134
+
+#define mmPSOC_CPU_PLL_SLIP_WD_CNTR                                  0xC70150
+
+#define mmPSOC_CPU_PLL_DIV_FACTOR_0                                  0xC70200
+
+#define mmPSOC_CPU_PLL_DIV_FACTOR_1                                  0xC70204
+
+#define mmPSOC_CPU_PLL_DIV_FACTOR_2                                  0xC70208
+
+#define mmPSOC_CPU_PLL_DIV_FACTOR_3                                  0xC7020C
+
+#define mmPSOC_CPU_PLL_DIV_FACTOR_CMD_0                              0xC70220
+
+#define mmPSOC_CPU_PLL_DIV_FACTOR_CMD_1                              0xC70224
+
+#define mmPSOC_CPU_PLL_DIV_FACTOR_CMD_2                              0xC70228
+
+#define mmPSOC_CPU_PLL_DIV_FACTOR_CMD_3                              0xC7022C
+
+#define mmPSOC_CPU_PLL_DIV_SEL_0                                     0xC70280
+
+#define mmPSOC_CPU_PLL_DIV_SEL_1                                     0xC70284
+
+#define mmPSOC_CPU_PLL_DIV_SEL_2                                     0xC70288
+
+#define mmPSOC_CPU_PLL_DIV_SEL_3                                     0xC7028C
+
+#define mmPSOC_CPU_PLL_DIV_EN_0                                      0xC702A0
+
+#define mmPSOC_CPU_PLL_DIV_EN_1                                      0xC702A4
+
+#define mmPSOC_CPU_PLL_DIV_EN_2                                      0xC702A8
+
+#define mmPSOC_CPU_PLL_DIV_EN_3                                      0xC702AC
+
+#define mmPSOC_CPU_PLL_DIV_FACTOR_BUSY_0                             0xC702C0
+
+#define mmPSOC_CPU_PLL_DIV_FACTOR_BUSY_1                             0xC702C4
+
+#define mmPSOC_CPU_PLL_DIV_FACTOR_BUSY_2                             0xC702C8
+
+#define mmPSOC_CPU_PLL_DIV_FACTOR_BUSY_3                             0xC702CC
+
+#define mmPSOC_CPU_PLL_CLK_GATER                                     0xC70300
+
+#define mmPSOC_CPU_PLL_CLK_RLX_0                                     0xC70310
+
+#define mmPSOC_CPU_PLL_CLK_RLX_1                                     0xC70314
+
+#define mmPSOC_CPU_PLL_CLK_RLX_2                                     0xC70318
+
+#define mmPSOC_CPU_PLL_CLK_RLX_3                                     0xC7031C
+
+#define mmPSOC_CPU_PLL_REF_CNTR_PERIOD                               0xC70400
+
+#define mmPSOC_CPU_PLL_REF_LOW_THRESHOLD                             0xC70410
+
+#define mmPSOC_CPU_PLL_REF_HIGH_THRESHOLD                            0xC70420
+
+#define mmPSOC_CPU_PLL_PLL_NOT_STABLE                                0xC70430
+
+#define mmPSOC_CPU_PLL_FREQ_CALC_EN                                  0xC70440
+
+#define mmPSOC_CPU_PLL_RLX_BITMAP_CFG                                0xC70500
+
+#define mmPSOC_CPU_PLL_RLX_BITMAP_0                                  0xC70510
+
+#define mmPSOC_CPU_PLL_RLX_BITMAP_1                                  0xC70514
+
+#define mmPSOC_CPU_PLL_RLX_BITMAP_2                                  0xC70518
+
+#define mmPSOC_CPU_PLL_RLX_BITMAP_3                                  0xC7051C
+
+#endif /* ASIC_REG_PSOC_CPU_PLL_REGS_H_ */