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063b8b1251
The updates to powerpc numa and memory hotplug code now use the in-kernel LMB array instead of the device tree. This change allows the pseries memory DLPAR code to only update the device tree once after successfully handling a DLPAR request. Prior to the in-kernel LMB array, the numa code looked up the affinity for memory being added in the device tree, the code now looks this up in the LMB array. This change means the memory hotplug code can just update the affinity for an LMB in the LMB array instead of updating the device tree. This also provides a savings in kernel memory. When updating the device tree old properties are never free'ed since there is no usecount on properties. This behavior leads to a new copy of the property being allocated every time a LMB is added or removed (i.e. a request to add 100 LMBs creates 100 new copies of the property). With this update only a single new property is created when a DLPAR request completes successfully. Signed-off-by: Nathan Fontenot <nfont@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
108 lines
2.6 KiB
C
108 lines
2.6 KiB
C
/*
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* drmem.h: Power specific logical memory block representation
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*
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* Copyright 2017 IBM Corporation
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef _ASM_POWERPC_LMB_H
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#define _ASM_POWERPC_LMB_H
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struct drmem_lmb {
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u64 base_addr;
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u32 drc_index;
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u32 aa_index;
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u32 flags;
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};
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struct drmem_lmb_info {
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struct drmem_lmb *lmbs;
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int n_lmbs;
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u32 lmb_size;
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};
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extern struct drmem_lmb_info *drmem_info;
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#define for_each_drmem_lmb_in_range(lmb, start, end) \
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for ((lmb) = (start); (lmb) <= (end); (lmb)++)
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#define for_each_drmem_lmb(lmb) \
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for_each_drmem_lmb_in_range((lmb), \
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&drmem_info->lmbs[0], \
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&drmem_info->lmbs[drmem_info->n_lmbs - 1])
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/*
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* The of_drconf_cell_v1 struct defines the layout of the LMB data
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* specified in the ibm,dynamic-memory device tree property.
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* The property itself is a 32-bit value specifying the number of
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* LMBs followed by an array of of_drconf_cell_v1 entries, one
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* per LMB.
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*/
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struct of_drconf_cell_v1 {
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__be64 base_addr;
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__be32 drc_index;
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__be32 reserved;
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__be32 aa_index;
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__be32 flags;
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};
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/*
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* Version 2 of the ibm,dynamic-memory property is defined as a
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* 32-bit value specifying the number of LMB sets followed by an
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* array of of_drconf_cell_v2 entries, one per LMB set.
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*/
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struct of_drconf_cell_v2 {
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u32 seq_lmbs;
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u64 base_addr;
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u32 drc_index;
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u32 aa_index;
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u32 flags;
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} __packed;
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#define DRCONF_MEM_ASSIGNED 0x00000008
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#define DRCONF_MEM_AI_INVALID 0x00000040
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#define DRCONF_MEM_RESERVED 0x00000080
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static inline u32 drmem_lmb_size(void)
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{
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return drmem_info->lmb_size;
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}
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#define DRMEM_LMB_RESERVED 0x80000000
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static inline void drmem_mark_lmb_reserved(struct drmem_lmb *lmb)
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{
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lmb->flags |= DRMEM_LMB_RESERVED;
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}
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static inline void drmem_remove_lmb_reservation(struct drmem_lmb *lmb)
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{
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lmb->flags &= ~DRMEM_LMB_RESERVED;
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}
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static inline bool drmem_lmb_reserved(struct drmem_lmb *lmb)
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{
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return lmb->flags & DRMEM_LMB_RESERVED;
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}
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u64 drmem_lmb_memory_max(void);
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void __init walk_drmem_lmbs(struct device_node *dn,
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void (*func)(struct drmem_lmb *, const __be32 **));
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int drmem_update_dt(void);
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#ifdef CONFIG_PPC_PSERIES
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void __init walk_drmem_lmbs_early(unsigned long node,
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void (*func)(struct drmem_lmb *, const __be32 **));
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#endif
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static inline void invalidate_lmb_associativity_index(struct drmem_lmb *lmb)
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{
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lmb->aa_index = 0xffffffff;
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}
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#endif /* _ASM_POWERPC_LMB_H */
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