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, 166 insertions, 0 deletions

diff --git a/include/uapi/rdma/efa-abi.h b/include/uapi/rdma/efa-abi.h
new file mode 100644
index 000000000..d5c18f8de
--- /dev/null
+++ b/include/uapi/rdma/efa-abi.h
@@ -0,0 +1,166 @@
+/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) */
+/*
+ * Copyright 2018-2026 Amazon.com, Inc. or its affiliates. All rights reserved.
+ */
+
+#ifndef EFA_ABI_USER_H
+#define EFA_ABI_USER_H
+
+#include <linux/types.h>
+#include <rdma/ib_user_ioctl_cmds.h>
+
+/*
+ * Increment this value if any changes that break userspace ABI
+ * compatibility are made.
+ */
+#define EFA_UVERBS_ABI_VERSION 1
+
+/*
+ * Keep structs aligned to 8 bytes.
+ * Keep reserved fields as arrays of __u8 named reserved_XXX where XXX is the
+ * hex bit offset of the field.
+ */
+
+enum {
+	EFA_ALLOC_UCONTEXT_CMD_SUPP_CAPS_TX_BATCH  = 1 << 0,
+	EFA_ALLOC_UCONTEXT_CMD_SUPP_CAPS_MIN_SQ_WR = 1 << 1,
+};
+
+struct efa_ibv_alloc_ucontext_cmd {
+	__u32 supported_caps;
+	__u8 reserved_20[4];
+};
+
+enum efa_ibv_user_cmds_supp_udata {
+	EFA_USER_CMDS_SUPP_UDATA_QUERY_DEVICE = 1 << 0,
+	EFA_USER_CMDS_SUPP_UDATA_CREATE_AH    = 1 << 1,
+};
+
+struct efa_ibv_alloc_ucontext_resp {
+	__u32 comp_mask;
+	__u32 cmds_supp_udata_mask;
+	__u16 sub_cqs_per_cq;
+	__u16 inline_buf_size;
+	__u32 max_llq_size; /* bytes */
+	__u16 max_tx_batch; /* units of 64 bytes */
+	__u16 min_sq_wr;
+	__u16 inline_buf_size_ex;
+	__u8 reserved_b0[2];
+};
+
+struct efa_ibv_alloc_pd_resp {
+	__u32 comp_mask;
+	__u16 pdn;
+	__u8 reserved_30[2];
+};
+
+enum {
+	EFA_CREATE_CQ_WITH_COMPLETION_CHANNEL = 1 << 0,
+	EFA_CREATE_CQ_WITH_SGID               = 1 << 1,
+};
+
+struct efa_ibv_create_cq {
+	__u32 comp_mask;
+	__u32 cq_entry_size;
+	__u16 num_sub_cqs;
+	__u8 flags;
+	__u8 reserved_58[5];
+};
+
+enum {
+	EFA_CREATE_CQ_RESP_DB_OFF = 1 << 0,
+};
+
+struct efa_ibv_create_cq_resp {
+	__u32 comp_mask;
+	__u8 reserved_20[4];
+	__aligned_u64 q_mmap_key;
+	__aligned_u64 q_mmap_size;
+	__u16 cq_idx;
+	__u8 reserved_d0[2];
+	__u32 db_off;
+	__aligned_u64 db_mmap_key;
+};
+
+enum {
+	EFA_QP_DRIVER_TYPE_SRD = 0,
+};
+
+enum {
+	EFA_CREATE_QP_WITH_UNSOLICITED_WRITE_RECV = 1 << 0,
+};
+
+struct efa_ibv_create_qp {
+	__u32 comp_mask;
+	__u32 rq_ring_size; /* bytes */
+	__u32 sq_ring_size; /* bytes */
+	__u32 driver_qp_type;
+	__u16 flags;
+	__u8 sl;
+	__u8 reserved_98[5];
+};
+
+struct efa_ibv_create_qp_resp {
+	__u32 comp_mask;
+	/* the offset inside the page of the rq db */
+	__u32 rq_db_offset;
+	/* the offset inside the page of the sq db */
+	__u32 sq_db_offset;
+	/* the offset inside the page of descriptors buffer */
+	__u32 llq_desc_offset;
+	__aligned_u64 rq_mmap_key;
+	__aligned_u64 rq_mmap_size;
+	__aligned_u64 rq_db_mmap_key;
+	__aligned_u64 sq_db_mmap_key;
+	__aligned_u64 llq_desc_mmap_key;
+	__u16 send_sub_cq_idx;
+	__u16 recv_sub_cq_idx;
+	__u8 reserved_1e0[4];
+};
+
+struct efa_ibv_create_ah_resp {
+	__u32 comp_mask;
+	__u16 efa_address_handle;
+	__u8 reserved_30[2];
+};
+
+enum {
+	EFA_QUERY_DEVICE_CAPS_RDMA_READ = 1 << 0,
+	EFA_QUERY_DEVICE_CAPS_RNR_RETRY = 1 << 1,
+	EFA_QUERY_DEVICE_CAPS_CQ_NOTIFICATIONS = 1 << 2,
+	EFA_QUERY_DEVICE_CAPS_CQ_WITH_SGID     = 1 << 3,
+	EFA_QUERY_DEVICE_CAPS_DATA_POLLING_128 = 1 << 4,
+	EFA_QUERY_DEVICE_CAPS_RDMA_WRITE = 1 << 5,
+	EFA_QUERY_DEVICE_CAPS_UNSOLICITED_WRITE_RECV = 1 << 6,
+	EFA_QUERY_DEVICE_CAPS_CQ_WITH_EXT_MEM = 1 << 7,
+};
+
+struct efa_ibv_ex_query_device_resp {
+	__u32 comp_mask;
+	__u32 max_sq_wr;
+	__u32 max_rq_wr;
+	__u16 max_sq_sge;
+	__u16 max_rq_sge;
+	__u32 max_rdma_size;
+	__u32 device_caps;
+};
+
+enum {
+	EFA_QUERY_MR_VALIDITY_RECV_IC_ID = 1 << 0,
+	EFA_QUERY_MR_VALIDITY_RDMA_READ_IC_ID = 1 << 1,
+	EFA_QUERY_MR_VALIDITY_RDMA_RECV_IC_ID = 1 << 2,
+};
+
+enum efa_query_mr_attrs {
+	EFA_IB_ATTR_QUERY_MR_HANDLE = (1U << UVERBS_ID_NS_SHIFT),
+	EFA_IB_ATTR_QUERY_MR_RESP_IC_ID_VALIDITY,
+	EFA_IB_ATTR_QUERY_MR_RESP_RECV_IC_ID,
+	EFA_IB_ATTR_QUERY_MR_RESP_RDMA_READ_IC_ID,
+	EFA_IB_ATTR_QUERY_MR_RESP_RDMA_RECV_IC_ID,
+};
+
+enum efa_mr_methods {
+	EFA_IB_METHOD_MR_QUERY = (1U << UVERBS_ID_NS_SHIFT),
+};
+
+#endif /* EFA_ABI_USER_H */