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b3bf76024f
The System EID (SEID) is an internal EID that is used by the SMCv2 software stack that has a predefined and constant value representing the s390 physical machine that the OS is executing on. So it should be managed by SMC stack instead of ISM driver and be consistent for all ISMv2 device (including virtual ISM devices) on s390 architecture. Suggested-by: Alexandra Winter <wintera@linux.ibm.com> Signed-off-by: Wen Gu <guwen@linux.alibaba.com> Reviewed-and-tested-by: Wenjia Zhang <wenjia@linux.ibm.com> Reviewed-by: Alexandra Winter <wintera@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
93 lines
2.2 KiB
C
93 lines
2.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Internal Shared Memory
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*
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* Definitions for the ISM module
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*
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* Copyright IBM Corp. 2022
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*/
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#ifndef _ISM_H
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#define _ISM_H
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#include <linux/workqueue.h>
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struct ism_dmb {
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u64 dmb_tok;
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u64 rgid;
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u32 dmb_len;
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u32 sba_idx;
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u32 vlan_valid;
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u32 vlan_id;
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void *cpu_addr;
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dma_addr_t dma_addr;
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};
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/* Unless we gain unexpected popularity, this limit should hold for a while */
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#define MAX_CLIENTS 8
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#define ISM_NR_DMBS 1920
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struct ism_dev {
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spinlock_t lock; /* protects the ism device */
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struct list_head list;
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struct pci_dev *pdev;
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struct ism_sba *sba;
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dma_addr_t sba_dma_addr;
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DECLARE_BITMAP(sba_bitmap, ISM_NR_DMBS);
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u8 *sba_client_arr; /* entries are indices into 'clients' array */
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void *priv[MAX_CLIENTS];
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struct ism_eq *ieq;
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dma_addr_t ieq_dma_addr;
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struct device dev;
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u64 local_gid;
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int ieq_idx;
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struct ism_client *subs[MAX_CLIENTS];
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};
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struct ism_event {
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u32 type;
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u32 code;
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u64 tok;
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u64 time;
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u64 info;
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};
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struct ism_client {
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const char *name;
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void (*add)(struct ism_dev *dev);
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void (*remove)(struct ism_dev *dev);
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void (*handle_event)(struct ism_dev *dev, struct ism_event *event);
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/* Parameter dmbemask contains a bit vector with updated DMBEs, if sent
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* via ism_move_data(). Callback function must handle all active bits
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* indicated by dmbemask.
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*/
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void (*handle_irq)(struct ism_dev *dev, unsigned int bit, u16 dmbemask);
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/* Private area - don't touch! */
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u8 id;
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};
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int ism_register_client(struct ism_client *client);
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int ism_unregister_client(struct ism_client *client);
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static inline void *ism_get_priv(struct ism_dev *dev,
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struct ism_client *client) {
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return dev->priv[client->id];
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}
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static inline void ism_set_priv(struct ism_dev *dev, struct ism_client *client,
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void *priv) {
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dev->priv[client->id] = priv;
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}
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int ism_register_dmb(struct ism_dev *dev, struct ism_dmb *dmb,
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struct ism_client *client);
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int ism_unregister_dmb(struct ism_dev *dev, struct ism_dmb *dmb);
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int ism_move(struct ism_dev *dev, u64 dmb_tok, unsigned int idx, bool sf,
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unsigned int offset, void *data, unsigned int size);
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const struct smcd_ops *ism_get_smcd_ops(void);
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#endif /* _ISM_H */
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