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, 66 insertions, 0 deletions

diff --git a/drivers/tty/ipwireless/main.h b/drivers/tty/ipwireless/main.h
new file mode 100644
index 000000000..a5728a5b3
--- /dev/null
+++ b/drivers/tty/ipwireless/main.h
@@ -0,0 +1,66 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * IPWireless 3G PCMCIA Network Driver
+ *
+ * Original code
+ *   by Stephen Blackheath <stephen@blacksapphire.com>,
+ *      Ben Martel <benm@symmetric.co.nz>
+ *
+ * Copyrighted as follows:
+ *   Copyright (C) 2004 by Symmetric Systems Ltd (NZ)
+ *
+ * Various driver changes and rewrites, port to new kernels
+ *   Copyright (C) 2006-2007 Jiri Kosina
+ *
+ * Misc code cleanups and updates
+ *   Copyright (C) 2007 David Sterba
+ */
+
+#ifndef _IPWIRELESS_CS_H_
+#define _IPWIRELESS_CS_H_
+
+#include <linux/sched.h>
+#include <linux/types.h>
+
+#include <pcmcia/cistpl.h>
+#include <pcmcia/ds.h>
+
+#include "hardware.h"
+
+#define IPWIRELESS_PCCARD_NAME		"ipwireless"
+#define IPWIRELESS_PCMCIA_VERSION	"1.1"
+#define IPWIRELESS_PCMCIA_AUTHOR        \
+	"Stephen Blackheath, Ben Martel, Jiri Kosina and David Sterba"
+
+#define IPWIRELESS_TX_QUEUE_SIZE  262144
+#define IPWIRELESS_RX_QUEUE_SIZE  262144
+
+#define IPWIRELESS_STATE_DEBUG
+
+struct ipw_hardware;
+struct ipw_network;
+struct ipw_tty;
+
+struct ipw_dev {
+	struct pcmcia_device *link;
+	int is_v2_card;
+
+	void __iomem *attr_memory;
+
+	void __iomem *common_memory;
+
+	/* Hardware context */
+	struct ipw_hardware *hardware;
+	/* Network layer context */
+	struct ipw_network *network;
+	/* TTY device context */
+	struct ipw_tty *tty;
+	struct work_struct work_reboot;
+};
+
+/* Module parametres */
+extern int ipwireless_debug;
+extern int ipwireless_loopback;
+extern int ipwireless_out_queue;
+
+#endif