[linux-block.git] / arch / powerpc / include / asm / drmem.h

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * drmem.h: Power specific logical memory block representation
 *
 * Copyright 2017 IBM Corporation
 */

#ifndef _ASM_POWERPC_LMB_H
#define _ASM_POWERPC_LMB_H

struct drmem_lmb {
	u64     base_addr;
	u32     drc_index;
	u32     aa_index;
	u32     flags;
#ifdef CONFIG_MEMORY_HOTPLUG
	int	nid;
#endif
};

struct drmem_lmb_info {
	struct drmem_lmb        *lmbs;
	int                     n_lmbs;
	u32                     lmb_size;
};

extern struct drmem_lmb_info *drmem_info;

#define for_each_drmem_lmb_in_range(lmb, start, end)		\
	for ((lmb) = (start); (lmb) <= (end); (lmb)++)

#define for_each_drmem_lmb(lmb)					\
	for_each_drmem_lmb_in_range((lmb),			\
		&drmem_info->lmbs[0],				\
		&drmem_info->lmbs[drmem_info->n_lmbs - 1])

/*
 * The of_drconf_cell_v1 struct defines the layout of the LMB data
 * specified in the ibm,dynamic-memory device tree property.
 * The property itself is a 32-bit value specifying the number of
 * LMBs followed by an array of of_drconf_cell_v1 entries, one
 * per LMB.
 */
struct of_drconf_cell_v1 {
	__be64	base_addr;
	__be32	drc_index;
	__be32	reserved;
	__be32	aa_index;
	__be32	flags;
};

/*
 * Version 2 of the ibm,dynamic-memory property is defined as a
 * 32-bit value specifying the number of LMB sets followed by an
 * array of of_drconf_cell_v2 entries, one per LMB set.
 */
struct of_drconf_cell_v2 {
	u32	seq_lmbs;
	u64	base_addr;
	u32	drc_index;
	u32	aa_index;
	u32	flags;
} __packed;

#define DRCONF_MEM_ASSIGNED	0x00000008
#define DRCONF_MEM_AI_INVALID	0x00000040
#define DRCONF_MEM_RESERVED	0x00000080

static inline u32 drmem_lmb_size(void)
{
	return drmem_info->lmb_size;
}

#define DRMEM_LMB_RESERVED	0x80000000

static inline void drmem_mark_lmb_reserved(struct drmem_lmb *lmb)
{
	lmb->flags |= DRMEM_LMB_RESERVED;
}

static inline void drmem_remove_lmb_reservation(struct drmem_lmb *lmb)
{
	lmb->flags &= ~DRMEM_LMB_RESERVED;
}

static inline bool drmem_lmb_reserved(struct drmem_lmb *lmb)
{
	return lmb->flags & DRMEM_LMB_RESERVED;
}

u64 drmem_lmb_memory_max(void);
void __init walk_drmem_lmbs(struct device_node *dn,
			void (*func)(struct drmem_lmb *, const __be32 **));
int drmem_update_dt(void);

#ifdef CONFIG_PPC_PSERIES
void __init walk_drmem_lmbs_early(unsigned long node,
			void (*func)(struct drmem_lmb *, const __be32 **));
#endif

static inline void invalidate_lmb_associativity_index(struct drmem_lmb *lmb)
{
	lmb->aa_index = 0xffffffff;
}

#ifdef CONFIG_MEMORY_HOTPLUG
static inline void lmb_set_nid(struct drmem_lmb *lmb)
{
	lmb->nid = memory_add_physaddr_to_nid(lmb->base_addr);
}
static inline void lmb_clear_nid(struct drmem_lmb *lmb)
{
	lmb->nid = -1;
}
#else
static inline void lmb_set_nid(struct drmem_lmb *lmb)
{
}
static inline void lmb_clear_nid(struct drmem_lmb *lmb)
{
}
#endif

#endif /* _ASM_POWERPC_LMB_H */
Commit	Line	Data
2874c5fd	1	/* SPDX-License-Identifier: GPL-2.0-or-later */
6c6ea537 NF	2	/*
	3	* drmem.h: Power specific logical memory block representation
	4	*
	5	* Copyright 2017 IBM Corporation
6c6ea537 NF	6	*/
	7
	8	#ifndef _ASM_POWERPC_LMB_H
	9	#define _ASM_POWERPC_LMB_H
	10
	11	struct drmem_lmb {
	12	u64 base_addr;
	13	u32 drc_index;
	14	u32 aa_index;
	15	u32 flags;
b2d3b5ee NF	16	#ifdef CONFIG_MEMORY_HOTPLUG
	17	int nid;
	18	#endif
6c6ea537 NF	19	};
	20
	21	struct drmem_lmb_info {
	22	struct drmem_lmb *lmbs;
	23	int n_lmbs;
	24	u32 lmb_size;
	25	};
	26
	27	extern struct drmem_lmb_info *drmem_info;
	28
	29	#define for_each_drmem_lmb_in_range(lmb, start, end) \
	30	for ((lmb) = (start); (lmb) <= (end); (lmb)++)
	31
	32	#define for_each_drmem_lmb(lmb) \
	33	for_each_drmem_lmb_in_range((lmb), \
	34	&drmem_info->lmbs[0], \
	35	&drmem_info->lmbs[drmem_info->n_lmbs - 1])
	36
2c777215 NF	37	/*
	38	* The of_drconf_cell_v1 struct defines the layout of the LMB data
	39	* specified in the ibm,dynamic-memory device tree property.
	40	* The property itself is a 32-bit value specifying the number of
	41	* LMBs followed by an array of of_drconf_cell_v1 entries, one
	42	* per LMB.
	43	*/
	44	struct of_drconf_cell_v1 {
	45	__be64 base_addr;
	46	__be32 drc_index;
	47	__be32 reserved;
	48	__be32 aa_index;
	49	__be32 flags;
	50	};
	51
2b31e3ae NF	52	/*
	53	* Version 2 of the ibm,dynamic-memory property is defined as a
	54	* 32-bit value specifying the number of LMB sets followed by an
	55	* array of of_drconf_cell_v2 entries, one per LMB set.
	56	*/
	57	struct of_drconf_cell_v2 {
	58	u32 seq_lmbs;
	59	u64 base_addr;
	60	u32 drc_index;
	61	u32 aa_index;
	62	u32 flags;
	63	} __packed;
	64
2c777215 NF	65	#define DRCONF_MEM_ASSIGNED 0x00000008
	66	#define DRCONF_MEM_AI_INVALID 0x00000040
	67	#define DRCONF_MEM_RESERVED 0x00000080
	68
6c6ea537 NF	69	static inline u32 drmem_lmb_size(void)
	70	{
	71	return drmem_info->lmb_size;
	72	}
	73
6195a500 NF	74	#define DRMEM_LMB_RESERVED 0x80000000
	75
	76	static inline void drmem_mark_lmb_reserved(struct drmem_lmb *lmb)
	77	{
	78	lmb->flags \|= DRMEM_LMB_RESERVED;
	79	}
	80
	81	static inline void drmem_remove_lmb_reservation(struct drmem_lmb *lmb)
	82	{
	83	lmb->flags &= ~DRMEM_LMB_RESERVED;
	84	}
	85
	86	static inline bool drmem_lmb_reserved(struct drmem_lmb *lmb)
	87	{
	88	return lmb->flags & DRMEM_LMB_RESERVED;
	89	}
	90
514a9cb3 NF	91	u64 drmem_lmb_memory_max(void);
	92	void __init walk_drmem_lmbs(struct device_node *dn,
	93	void (func)(struct drmem_lmb , const __be32 **));
6195a500	94	int drmem_update_dt(void);
514a9cb3	95
6c6ea537 NF	96	#ifdef CONFIG_PPC_PSERIES
	97	void __init walk_drmem_lmbs_early(unsigned long node,
	98	void (func)(struct drmem_lmb , const __be32 **));
	99	#endif
	100
063b8b12 NF	101	static inline void invalidate_lmb_associativity_index(struct drmem_lmb *lmb)
	102	{
	103	lmb->aa_index = 0xffffffff;
	104	}
	105
b2d3b5ee NF	106	#ifdef CONFIG_MEMORY_HOTPLUG
	107	static inline void lmb_set_nid(struct drmem_lmb *lmb)
	108	{
	109	lmb->nid = memory_add_physaddr_to_nid(lmb->base_addr);
	110	}
	111	static inline void lmb_clear_nid(struct drmem_lmb *lmb)
	112	{
	113	lmb->nid = -1;
	114	}
	115	#else
	116	static inline void lmb_set_nid(struct drmem_lmb *lmb)
	117	{
	118	}
	119	static inline void lmb_clear_nid(struct drmem_lmb *lmb)
	120	{
	121	}
	122	#endif
	123
6c6ea537	124	#endif /* _ASM_POWERPC_LMB_H */