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82087c0330
The similar smc_ib_devices spinlock has been converted to a mutex.
Protecting the smcd_dev_list by a mutex is possible as well. This
patch converts the smcd_dev_list spinlock to a mutex.
Fixes: c6ba7c9ba4 ("net/smc: add base infrastructure for SMC-D and ISM")
Signed-off-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
51 lines
1.5 KiB
C
51 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/* Shared Memory Communications Direct over ISM devices (SMC-D)
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*
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* SMC-D ISM device structure definitions.
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*
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* Copyright IBM Corp. 2018
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*/
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#ifndef SMCD_ISM_H
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#define SMCD_ISM_H
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#include <linux/uio.h>
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#include <linux/mutex.h>
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#include "smc.h"
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struct smcd_dev_list { /* List of SMCD devices */
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struct list_head list;
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struct mutex mutex; /* Protects list of devices */
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};
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extern struct smcd_dev_list smcd_dev_list; /* list of smcd devices */
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struct smc_ism_vlanid { /* VLAN id set on ISM device */
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struct list_head list;
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unsigned short vlanid; /* Vlan id */
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refcount_t refcnt; /* Reference count */
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};
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struct smc_ism_position { /* ISM device position to write to */
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u64 token; /* Token of DMB */
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u32 offset; /* Offset into DMBE */
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u8 index; /* Index of DMBE */
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u8 signal; /* Generate interrupt on owner side */
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};
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struct smcd_dev;
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int smc_ism_cantalk(u64 peer_gid, unsigned short vlan_id, struct smcd_dev *dev);
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void smc_ism_set_conn(struct smc_connection *conn);
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void smc_ism_unset_conn(struct smc_connection *conn);
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int smc_ism_get_vlan(struct smcd_dev *dev, unsigned short vlan_id);
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int smc_ism_put_vlan(struct smcd_dev *dev, unsigned short vlan_id);
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int smc_ism_register_dmb(struct smc_link_group *lgr, int buf_size,
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struct smc_buf_desc *dmb_desc);
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int smc_ism_unregister_dmb(struct smcd_dev *dev, struct smc_buf_desc *dmb_desc);
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int smc_ism_write(struct smcd_dev *dev, const struct smc_ism_position *pos,
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void *data, size_t len);
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int smc_ism_signal_shutdown(struct smc_link_group *lgr);
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#endif
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