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>

1 files changed, 82 insertions, 0 deletions

diff --git a/tools/perf/util/libbfd.h b/tools/perf/util/libbfd.h
new file mode 100644
index 000000000..953886f3d
--- /dev/null
+++ b/tools/perf/util/libbfd.h
@@ -0,0 +1,82 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __PERF_LIBBFD_H
+#define __PERF_LIBBFD_H
+
+#include <linux/compiler.h>
+#include <linux/types.h>
+#include <stdbool.h>
+#include <stddef.h>
+
+struct annotate_args;
+struct build_id;
+struct dso;
+struct inline_node;
+struct symbol;
+
+#ifdef HAVE_LIBBFD_SUPPORT
+int libbfd__addr2line(const char *dso_name, u64 addr,
+		char **file, unsigned int *line, struct dso *dso,
+		bool unwind_inlines, struct inline_node *node,
+		struct symbol *sym);
+
+
+void dso__free_a2l_libbfd(struct dso *dso);
+
+int symbol__disassemble_libbfd(const char *filename, struct symbol *sym,
+			     struct annotate_args *args);
+
+int libbfd__read_build_id(const char *filename, struct build_id *bid);
+
+int libbfd_filename__read_debuglink(const char *filename, char *debuglink, size_t size);
+
+int symbol__disassemble_bpf_libbfd(struct symbol *sym, struct annotate_args *args);
+
+#else // !defined(HAVE_LIBBFD_SUPPORT)
+#include "annotate.h"
+
+static inline int libbfd__addr2line(const char *dso_name __always_unused,
+				u64 addr __always_unused,
+				char **file __always_unused,
+				unsigned int *line __always_unused,
+				struct dso *dso __always_unused,
+				bool unwind_inlines __always_unused,
+				struct inline_node *node __always_unused,
+				struct symbol *sym __always_unused)
+{
+	return -1;
+}
+
+
+static inline void dso__free_a2l_libbfd(struct dso *dso __always_unused)
+{
+}
+
+static inline int symbol__disassemble_libbfd(const char *filename __always_unused,
+					struct symbol *sym __always_unused,
+					struct annotate_args *args __always_unused)
+{
+	return -1;
+}
+
+static inline int libbfd__read_build_id(const char *filename __always_unused,
+					struct build_id *bid __always_unused)
+{
+	return -1;
+}
+
+static inline int libbfd_filename__read_debuglink(const char *filename __always_unused,
+						char *debuglink __always_unused,
+						size_t size __always_unused)
+{
+	return -1;
+}
+
+static inline int symbol__disassemble_bpf_libbfd(struct symbol *sym __always_unused,
+						 struct annotate_args *args __always_unused)
+{
+	return SYMBOL_ANNOTATE_ERRNO__NO_LIBOPCODES_FOR_BPF;
+}
+
+#endif // defined(HAVE_LIBBFD_SUPPORT)
+
+#endif /* __PERF_LIBBFD_H */