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cc21191b58
Use struct dibs_dmb instead of struct smc_dmb and move the corresponding client tables to dibs_dev. Leave driver specific implementation details like sba in the device drivers. Register and unregister dmbs via dibs_dev_ops. A dmb is dedicated to a single client, but a dibs device can have dmbs for more than one client. Trigger dibs clients via dibs_client_ops->handle_irq(), when data is received into a dmb. For dibs_loopback replace scheduling an smcd receive tasklet with calling dibs_client_ops->handle_irq(). For loopback devices attach_dmb(), detach_dmb() and move_data() need to access the dmb tables, so move those to dibs_dev_ops in this patch as well. Remove remaining definitions of smc_loopback as they are no longer required, now that everything is in dibs_loopback. Note that struct ism_client and struct ism_dev are still required in smc until a follow-on patch moves event handling to dibs. (Loopback does not use events). Signed-off-by: Alexandra Winter <wintera@linux.ibm.com> Link: https://patch.msgid.link/20250918110500.1731261-14-wintera@linux.ibm.com Signed-off-by: Paolo Abeni <pabeni@redhat.com>
58 lines
1.1 KiB
C
58 lines
1.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* dibs loopback (aka loopback-ism) device structure definitions.
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*
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* Copyright (c) 2024, Alibaba Inc.
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*
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* Author: Wen Gu <guwen@linux.alibaba.com>
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* Tony Lu <tonylu@linux.alibaba.com>
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*
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*/
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#ifndef _DIBS_LOOPBACK_H
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#define _DIBS_LOOPBACK_H
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#include <linux/dibs.h>
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#include <linux/hashtable.h>
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#include <linux/spinlock.h>
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#include <linux/types.h>
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#include <linux/wait.h>
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#if IS_ENABLED(CONFIG_DIBS_LO)
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#define DIBS_LO_DMBS_HASH_BITS 12
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#define DIBS_LO_MAX_DMBS 5000
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struct dibs_lo_dmb_node {
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struct hlist_node list;
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u64 token;
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u32 len;
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u32 sba_idx;
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void *cpu_addr;
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dma_addr_t dma_addr;
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refcount_t refcnt;
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};
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struct dibs_lo_dev {
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struct dibs_dev *dibs;
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atomic_t dmb_cnt;
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rwlock_t dmb_ht_lock;
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DECLARE_BITMAP(sba_idx_mask, DIBS_LO_MAX_DMBS);
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DECLARE_HASHTABLE(dmb_ht, DIBS_LO_DMBS_HASH_BITS);
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wait_queue_head_t ldev_release;
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};
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int dibs_loopback_init(void);
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void dibs_loopback_exit(void);
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#else
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static inline int dibs_loopback_init(void)
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{
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return 0;
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}
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static inline void dibs_loopback_exit(void)
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{
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}
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#endif
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#endif /* _DIBS_LOOPBACK_H */
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