Commit 41efa431 authored by Reinette Chatre's avatar Reinette Chatre Committed by Thomas Gleixner
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PCI/MSI: Provide stubs for IMS functions 



The IMS related functions (pci_create_ims_domain(), pci_ims_alloc_irq(),
and pci_ims_free_irq()) are not declared when CONFIG_PCI_MSI is disabled.

Provide definitions of these functions for use when callers are compiled
with CONFIG_PCI_MSI disabled.

Fixes: 0194425a ("PCI/MSI: Provide IMS (Interrupt Message Store) support")
Fixes: c9e5bea2 ("PCI/MSI: Provide pci_ims_alloc/free_irq()")
Signed-off-by: default avatarReinette Chatre <reinette.chatre@intel.com>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/14ff656899a3757453f8584c1109d7a9b98fa258.1697564731.git.reinette.chatre@intel.com
parent f881feb1

include/linux/pci.h

+26 −8
Original line number Diff line number Diff line
@@ -1624,6 +1624,8 @@ struct msix_entry { 
	u16	entry;	/* Driver uses to specify entry, OS writes */

};



struct msi_domain_template;



#ifdef CONFIG_PCI_MSI

int pci_msi_vec_count(struct pci_dev *dev);

void pci_disable_msi(struct pci_dev *dev);
@@ -1656,6 +1658,11 @@ void pci_msix_free_irq(struct pci_dev *pdev, struct msi_map map); 
void pci_free_irq_vectors(struct pci_dev *dev);

int pci_irq_vector(struct pci_dev *dev, unsigned int nr);

const struct cpumask *pci_irq_get_affinity(struct pci_dev *pdev, int vec);

bool pci_create_ims_domain(struct pci_dev *pdev, const struct msi_domain_template *template,

			   unsigned int hwsize, void *data);

struct msi_map pci_ims_alloc_irq(struct pci_dev *pdev, union msi_instance_cookie *icookie,

				 const struct irq_affinity_desc *affdesc);

void pci_ims_free_irq(struct pci_dev *pdev, struct msi_map map);



#else

static inline int pci_msi_vec_count(struct pci_dev *dev) { return -ENOSYS; }
@@ -1719,6 +1726,25 @@ static inline const struct cpumask *pci_irq_get_affinity(struct pci_dev *pdev, 
{

	return cpu_possible_mask;

}



static inline bool pci_create_ims_domain(struct pci_dev *pdev,

					 const struct msi_domain_template *template,

					 unsigned int hwsize, void *data)

{ return false; }



static inline struct msi_map pci_ims_alloc_irq(struct pci_dev *pdev,

					       union msi_instance_cookie *icookie,

					       const struct irq_affinity_desc *affdesc)

{

	struct msi_map map = { .index = -ENOSYS, };



	return map;

}



static inline void pci_ims_free_irq(struct pci_dev *pdev, struct msi_map map)

{

}



#endif



/**
@@ -2616,14 +2642,6 @@ static inline bool pci_is_thunderbolt_attached(struct pci_dev *pdev) 
void pci_uevent_ers(struct pci_dev *pdev, enum  pci_ers_result err_type);

#endif



struct msi_domain_template;



bool pci_create_ims_domain(struct pci_dev *pdev, const struct msi_domain_template *template,

			   unsigned int hwsize, void *data);

struct msi_map pci_ims_alloc_irq(struct pci_dev *pdev, union msi_instance_cookie *icookie,

				 const struct irq_affinity_desc *affdesc);

void pci_ims_free_irq(struct pci_dev *pdev, struct msi_map map);



#include <linux/dma-mapping.h>



#define pci_printk(level, pdev, fmt, arg...) \