diff options
| author | Alexandra Winter <wintera@linux.ibm.com> | 2025-09-18 13:04:51 +0200 |
|---|---|---|
| committer | Paolo Abeni <pabeni@redhat.com> | 2025-09-23 11:13:21 +0200 |
| commit | 269726968f95ebc00e3a47f91eebd6818991d6fa (patch) | |
| tree | 2597d41085852dff4d577343a34542def2b21559 /include/linux | |
| parent | d324a2ca3f8efd57f5839aa2690554a5cbb3586f (diff) | |
dibs: Register ism as dibs device
Register ism devices with the dibs layer. Follow-on patches will move
functionality to the dibs layer.
As DIBS is only a shim layer without any dependencies, we can depend ISM
on DIBS without adding indirect dependencies. A follow-on patch will
remove implication of SMC by ISM.
Define struct dibs_dev. Follow-on patches will move more content into
dibs_dev. The goal of follow-on patches is that ism_dev will only
contain fields that are special for this device driver. The same concept
will apply to other dibs device drivers.
Define dibs_dev_alloc(), dibs_dev_add() and dibs_dev_del() to be called
by dibs device drivers and call them from ism_drv.c
Use ism_dev.dibs for a pointer to dibs_dev.
Signed-off-by: Alexandra Winter <wintera@linux.ibm.com>
Link: https://patch.msgid.link/20250918110500.1731261-6-wintera@linux.ibm.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/dibs.h | 38 | ||||
| -rw-r--r-- | include/linux/ism.h | 1 |
2 files changed, 39 insertions, 0 deletions
diff --git a/include/linux/dibs.h b/include/linux/dibs.h index 7bedeaf52c1b..c12db19c98c0 100644 --- a/include/linux/dibs.h +++ b/include/linux/dibs.h @@ -9,6 +9,7 @@ #ifndef _DIBS_H #define _DIBS_H +#include <linux/device.h> /* DIBS - Direct Internal Buffer Sharing - concept * ----------------------------------------------- * In the case of multiple system sharing the same hardware, dibs fabrics can @@ -62,4 +63,41 @@ int dibs_register_client(struct dibs_client *client); */ int dibs_unregister_client(struct dibs_client *client); +/* DIBS devices + * ------------ + */ +struct dibs_dev { + struct list_head list; +}; + +/* ------- End of client-only functions ----------- */ + +/* + * Functions to be called by dibs device drivers: + */ +/** + * dibs_dev_alloc() - allocate and reference device structure + * + * The following fields will be valid upon successful return: dev + * NOTE: Use put_device(dibs_get_dev(@dibs)) to give up your reference instead + * of freeing @dibs @dev directly once you have successfully called this + * function. + * Return: Pointer to dibs device structure + */ +struct dibs_dev *dibs_dev_alloc(void); +/** + * dibs_dev_add() - register with dibs layer and all clients + * @dibs: dibs device + * + * The following fields must be valid upon entry: dev, ops, drv_priv + * All fields will be valid upon successful return. + * Return: zero on success + */ +int dibs_dev_add(struct dibs_dev *dibs); +/** + * dibs_dev_del() - unregister from dibs layer and all clients + * @dibs: dibs device + */ +void dibs_dev_del(struct dibs_dev *dibs); + #endif /* _DIBS_H */ diff --git a/include/linux/ism.h b/include/linux/ism.h index 8358b4cd7ba6..9a53d3c48c16 100644 --- a/include/linux/ism.h +++ b/include/linux/ism.h @@ -30,6 +30,7 @@ struct ism_dev { spinlock_t lock; /* protects the ism device */ spinlock_t cmd_lock; /* serializes cmds */ struct list_head list; + struct dibs_dev *dibs; struct pci_dev *pdev; struct ism_sba *sba; |