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| author | Adam Aharon <aaharon@habana.ai> | 2020-05-26 11:04:30 +0300 |
|---|---|---|
| committer | Oded Gabbay <oded.gabbay@gmail.com> | 2020-07-24 20:31:35 +0300 |
| commit | e8edded6939e4c194ab302d4913cb1a9319561d9 (patch) | |
| tree | 6ea4ff88e36c93918da57e71fdb8d30523734dc4 /drivers/misc/habanalabs/gaudi/gaudi.c | |
| parent | 6ced91170df88ff03b7d4c9ec87c185ebf8443be (diff) | |
| download | lwn-e8edded6939e4c194ab302d4913cb1a9319561d9.tar.gz lwn-e8edded6939e4c194ab302d4913cb1a9319561d9.zip | |
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>
Diffstat (limited to 'drivers/misc/habanalabs/gaudi/gaudi.c')
| -rw-r--r-- | drivers/misc/habanalabs/gaudi/gaudi.c | 33 |
1 files changed, 29 insertions, 4 deletions
diff --git a/drivers/misc/habanalabs/gaudi/gaudi.c b/drivers/misc/habanalabs/gaudi/gaudi.c index 0c5d5831f327..aa4139626a04 100644 --- a/drivers/misc/habanalabs/gaudi/gaudi.c +++ b/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, |