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| author | Danilo Krummrich <dakr@kernel.org> | 2026-08-13 18:52:04 +0200 |
|---|---|---|
| committer | Danilo Krummrich <dakr@kernel.org> | 2026-08-17 01:41:36 +0200 |
| commit | f146c7bc85a51f95c05e0f8173d484eb301ece78 (patch) | |
| tree | 07296ae54ed6551492b0c609dc0f5463f61f89ca /include/trace/events/devfreq.h | |
| download | linux-stable-f146c7bc85a51f95c05e0f8173d484eb301ece78.tar.gz linux-stable-f146c7bc85a51f95c05e0f8173d484eb301ece78.zip | |
PCI: Add pci_irq_type() to query the allocated interrupt typegrafted
Add a helper that returns PCI_IRQ_MSIX, PCI_IRQ_MSI, or PCI_IRQ_INTX
based on the interrupt type the PCI core selected after
pci_alloc_irq_vectors().
Several drivers already open-code this check against pdev->msix_enabled
and pdev->msi_enabled, or even open code this helper [1].
A common helper avoids the duplication and keeps drivers from accessing
the bitfield directly (see also [2]).
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Tested-by: John Hubbard <jhubbard@nvidia.com>
Link: https://elixir.bootlin.com/linux/v7.1/source/drivers/net/ethernet/aquantia/atlantic/aq_pci_func.c#L196 [1]
Inspired-by: John Hubbard <jhubbard@nvidia.com>
Link: https://lore.kernel.org/all/DKKG2QM3YJYB.Z2H2B2UXJ75N@kernel.org/ [2]
Reviewed-by: Gary Guo <gary@garyguo.net>
Link: https://patch.msgid.link/20260813165234.620555-5-dakr@kernel.org
[ Add missing pci_irq_type() stub for CONFIG_PCI=n. ]
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
Diffstat (limited to 'include/trace/events/devfreq.h')
| -rw-r--r-- | include/trace/events/devfreq.h | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/include/trace/events/devfreq.h b/include/trace/events/devfreq.h new file mode 100644 index 000000000..6cbc4d59f --- /dev/null +++ b/include/trace/events/devfreq.h @@ -0,0 +1,68 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#undef TRACE_SYSTEM +#define TRACE_SYSTEM devfreq + +#if !defined(_TRACE_DEVFREQ_H) || defined(TRACE_HEADER_MULTI_READ) +#define _TRACE_DEVFREQ_H + +#include <linux/devfreq.h> +#include <linux/tracepoint.h> + +TRACE_EVENT(devfreq_frequency, + TP_PROTO(struct devfreq *devfreq, unsigned long freq, + unsigned long prev_freq), + + TP_ARGS(devfreq, freq, prev_freq), + + TP_STRUCT__entry( + __string(dev_name, dev_name(&devfreq->dev)) + __field(unsigned long, freq) + __field(unsigned long, prev_freq) + __field(unsigned long, busy_time) + __field(unsigned long, total_time) + ), + + TP_fast_assign( + __assign_str(dev_name); + __entry->freq = freq; + __entry->prev_freq = prev_freq; + __entry->busy_time = devfreq->last_status.busy_time; + __entry->total_time = devfreq->last_status.total_time; + ), + + TP_printk("dev_name=%-30s freq=%-12lu prev_freq=%-12lu load=%-2lu", + __get_str(dev_name), __entry->freq, __entry->prev_freq, + __entry->total_time == 0 ? 0 : + (100 * __entry->busy_time) / __entry->total_time) +); + +TRACE_EVENT(devfreq_monitor, + TP_PROTO(struct devfreq *devfreq), + + TP_ARGS(devfreq), + + TP_STRUCT__entry( + __field(unsigned long, freq) + __field(unsigned long, busy_time) + __field(unsigned long, total_time) + __field(unsigned int, polling_ms) + __string(dev_name, dev_name(&devfreq->dev)) + ), + + TP_fast_assign( + __entry->freq = devfreq->previous_freq; + __entry->busy_time = devfreq->last_status.busy_time; + __entry->total_time = devfreq->last_status.total_time; + __entry->polling_ms = devfreq->profile->polling_ms; + __assign_str(dev_name); + ), + + TP_printk("dev_name=%-30s freq=%-12lu polling_ms=%-3u load=%-2lu", + __get_str(dev_name), __entry->freq, __entry->polling_ms, + __entry->total_time == 0 ? 0 : + (100 * __entry->busy_time) / __entry->total_time) +); +#endif /* _TRACE_DEVFREQ_H */ + +/* This part must be outside protection */ +#include <trace/define_trace.h> |