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NTB/msi: Remove unused functions

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ntbm_msi_free_irq() and ntb_msi_peer_addr() were both added in 2019's
commit 26b3a37b92 ("NTB: Introduce MSI library")
but have remained unused.

Remove them, and the ntbm_msi_callback_match() helper that
was used by ntbm_msi_free_irq().

Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
This commit is contained in:
Dr. David Alan Gilbert 2025-02-20 02:03:57 +00:00 • committed by Jon Mason
parent b1f4077465
commit 7bd27439a5
2 changed files with 0 additions and 78 deletions
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64
drivers/ntb/msi.c
View file

@ -315,37 +315,6 @@ int ntbm_msi_request_threaded_irq(struct ntb_dev *ntb, irq_handler_t handler,
}
EXPORT_SYMBOL(ntbm_msi_request_threaded_irq);
static int ntbm_msi_callback_match(struct device *dev, void *res, void *data)
{
struct ntb_dev *ntb = dev_ntb(dev);
struct ntb_msi_devres *dr = res;
return dr->ntb == ntb && dr->entry == data;
}
/**
* ntbm_msi_free_irq() - free an interrupt
* @ntb: NTB device context
* @irq: Interrupt line to free
* @dev_id: Device identity to free
*
* This function should be used to manually free IRQs allocated with
* ntbm_request_[threaded_]irq().
*/
void ntbm_msi_free_irq(struct ntb_dev *ntb, unsigned int irq, void *dev_id)
{
struct msi_desc *entry = irq_get_msi_desc(irq);
entry->write_msi_msg = NULL;
entry->write_msi_msg_data = NULL;
WARN_ON(devres_destroy(&ntb->dev, ntbm_msi_callback_release,
ntbm_msi_callback_match, entry));
devm_free_irq(&ntb->dev, irq, dev_id);
}
EXPORT_SYMBOL(ntbm_msi_free_irq);
/**
* ntb_msi_peer_trigger() - Trigger an interrupt handler on a peer
* @ntb: NTB device context
@ -373,36 +342,3 @@ int ntb_msi_peer_trigger(struct ntb_dev *ntb, int peer,
return 0;
}
EXPORT_SYMBOL(ntb_msi_peer_trigger);
/**
* ntb_msi_peer_addr() - Get the DMA address to trigger a peer's MSI interrupt
* @ntb: NTB device context
* @peer: Peer index
* @desc: MSI descriptor data which triggers the interrupt
* @msi_addr: Physical address to trigger the interrupt
*
* This function allows using DMA engines to trigger an interrupt
* (for example, trigger an interrupt to process the data after
* sending it). To trigger the interrupt, write @desc.data to the address
* returned in @msi_addr
*
* Return: Zero on success, otherwise a negative error number.
*/
int ntb_msi_peer_addr(struct ntb_dev *ntb, int peer,
struct ntb_msi_desc *desc,
phys_addr_t *msi_addr)
{
int peer_widx = ntb_peer_mw_count(ntb) - 1 - peer;
phys_addr_t mw_phys_addr;
int ret;
ret = ntb_peer_mw_get_addr(ntb, peer_widx, &mw_phys_addr, NULL);
if (ret)
return ret;
if (msi_addr)
*msi_addr = mw_phys_addr + desc->addr_offset;
return 0;
}
EXPORT_SYMBOL(ntb_msi_peer_addr);

14
include/linux/ntb.h
View file

@ -1647,12 +1647,8 @@ int ntbm_msi_request_threaded_irq(struct ntb_dev *ntb, irq_handler_t handler,
irq_handler_t thread_fn,
const char *name, void *dev_id,
struct ntb_msi_desc *msi_desc);
void ntbm_msi_free_irq(struct ntb_dev *ntb, unsigned int irq, void *dev_id);
int ntb_msi_peer_trigger(struct ntb_dev *ntb, int peer,
struct ntb_msi_desc *desc);
int ntb_msi_peer_addr(struct ntb_dev *ntb, int peer,
struct ntb_msi_desc *desc,
phys_addr_t *msi_addr);
#else /* not CONFIG_NTB_MSI */
@ -1674,21 +1670,11 @@ static inline int ntbm_msi_request_threaded_irq(struct ntb_dev *ntb,
{
return -EOPNOTSUPP;
}
static inline void ntbm_msi_free_irq(struct ntb_dev *ntb, unsigned int irq,
void *dev_id) {}
static inline int ntb_msi_peer_trigger(struct ntb_dev *ntb, int peer,
struct ntb_msi_desc *desc)
{
return -EOPNOTSUPP;
}
static inline int ntb_msi_peer_addr(struct ntb_dev *ntb, int peer,
struct ntb_msi_desc *desc,
phys_addr_t *msi_addr)
{
return -EOPNOTSUPP;
}
#endif /* CONFIG_NTB_MSI */
static inline int ntbm_msi_request_irq(struct ntb_dev *ntb,