| 1 |
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| 2 | |
| 3 | * PCC (Platform Communications Channel) methods
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| 4 |
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| 5 |
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| 6 | #ifndef _PCC_H
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| 7 | #define _PCC_H
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| 8 |
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| 9 | #include <linux/mailbox_controller.h>
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| 10 | #include <linux/mailbox_client.h>
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| 11 |
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| 12 | struct pcc_mbox_chan {
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| 13 | struct mbox_chan *mchan;
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| 14 | u64 shmem_base_addr;
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| 15 | void __iomem *shmem;
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| 16 | u64 shmem_size;
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| 17 | u32 latency;
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| 18 | u32 max_access_rate;
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| 19 | u16 min_turnaround_time;
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| 20 | };
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| 21 |
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| 22 |
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| 23 | #define PCC_SIGNATURE 0x50434300
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| 24 |
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| 25 | #define PCC_CMD_GENERATE_DB_INTR BIT(15)
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| 26 |
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| 27 | #define PCC_STATUS_CMD_COMPLETE BIT(0)
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| 28 | #define PCC_STATUS_SCI_DOORBELL BIT(1)
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| 29 | #define PCC_STATUS_ERROR BIT(2)
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| 30 | #define PCC_STATUS_PLATFORM_NOTIFY BIT(3)
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| 31 |
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| 32 | #define PCC_CMD_COMPLETION_NOTIFY BIT(0)
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| 33 |
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| 34 | #define MAX_PCC_SUBSPACES 256
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| 35 |
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| 36 | #ifdef CONFIG_PCC
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| 37 | extern struct pcc_mbox_chan *
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| 38 | pcc_mbox_request_channel(struct mbox_client *cl, int subspace_id);
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| 39 | extern void pcc_mbox_free_channel(struct pcc_mbox_chan *chan);
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| 40 | #else
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| 41 | static inline struct pcc_mbox_chan *
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| 42 | pcc_mbox_request_channel(struct mbox_client *cl, int subspace_id)
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| 43 | {
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| 44 | return ERR_PTR(-ENODEV);
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| 45 | }
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| 46 | static inline void pcc_mbox_free_channel(struct pcc_mbox_chan *chan) { }
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| 47 | #endif
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| 48 |
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| 49 | #endif
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