powerpc/numa: Update numa code use walk_drmem_lmbs
Update code in powerpc/numa.c to use the walk_drmem_lmbs() routine instead of parsing the device tree directly. This is in anticipation of introducing a new ibm,dynamic-memory-v2 property with a different format. This will allow the numa code to use a single initialization routine per-LMB irregardless of the device tree format. Additionally, to support additional routines in numa.c that need to look up LMB information, an late_init routine is added to drmem.c to allocate the array of LMB information. This LMB array will provide per-LMB information to separate the LMB data from the device tree format. Signed-off-by: Nathan Fontenot <nfont@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Nathan Fontenot
Michael Ellerman
parent
6c6ea53725
commit
514a9cb331
@ -40,6 +40,10 @@ static inline u32 drmem_lmb_size(void)
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return drmem_info->lmb_size;
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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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#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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@ -21,7 +21,14 @@
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static struct drmem_lmb_info __drmem_info;
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struct drmem_lmb_info *drmem_info = &__drmem_info;
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#ifdef CONFIG_PPC_PSERIES
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u64 drmem_lmb_memory_max(void)
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{
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struct drmem_lmb *last_lmb;
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last_lmb = &drmem_info->lmbs[drmem_info->n_lmbs - 1];
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return last_lmb->base_addr + drmem_lmb_size();
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}
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static void __init read_drconf_v1_cell(struct drmem_lmb *lmb,
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const __be32 **prop)
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{
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@ -52,6 +59,7 @@ static void __init __walk_drmem_v1_lmbs(const __be32 *prop, const __be32 *usm,
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}
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}
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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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{
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@ -74,3 +82,93 @@ void __init walk_drmem_lmbs_early(unsigned long node,
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}
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#endif
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static int __init init_drmem_lmb_size(struct device_node *dn)
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{
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const __be32 *prop;
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int len;
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if (drmem_info->lmb_size)
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return 0;
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prop = of_get_property(dn, "ibm,lmb-size", &len);
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if (!prop || len < dt_root_size_cells * sizeof(__be32)) {
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pr_info("Could not determine LMB size\n");
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return -1;
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}
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drmem_info->lmb_size = dt_mem_next_cell(dt_root_size_cells, &prop);
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return 0;
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}
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/*
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* Returns the property linux,drconf-usable-memory if
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* it exists (the property exists only in kexec/kdump kernels,
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* added by kexec-tools)
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*/
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static const __be32 *of_get_usable_memory(struct device_node *dn)
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{
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const __be32 *prop;
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u32 len;
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prop = of_get_property(dn, "linux,drconf-usable-memory", &len);
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if (!prop || len < sizeof(unsigned int))
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return NULL;
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return prop;
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}
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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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{
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const __be32 *prop, *usm;
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if (init_drmem_lmb_size(dn))
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return;
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usm = of_get_usable_memory(dn);
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prop = of_get_property(dn, "ibm,dynamic-memory", NULL);
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if (prop)
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__walk_drmem_v1_lmbs(prop, usm, func);
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}
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static void __init init_drmem_v1_lmbs(const __be32 *prop)
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{
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struct drmem_lmb *lmb;
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drmem_info->n_lmbs = of_read_number(prop++, 1);
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drmem_info->lmbs = kcalloc(drmem_info->n_lmbs, sizeof(*lmb),
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GFP_KERNEL);
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if (!drmem_info->lmbs)
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return;
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for_each_drmem_lmb(lmb)
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read_drconf_v1_cell(lmb, &prop);
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}
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static int __init drmem_init(void)
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{
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struct device_node *dn;
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const __be32 *prop;
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dn = of_find_node_by_path("/ibm,dynamic-reconfiguration-memory");
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if (!dn) {
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pr_info("No dynamic reconfiguration memory found\n");
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return 0;
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}
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if (init_drmem_lmb_size(dn)) {
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of_node_put(dn);
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return 0;
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}
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prop = of_get_property(dn, "ibm,dynamic-memory", NULL);
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if (prop)
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init_drmem_v1_lmbs(prop);
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of_node_put(dn);
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return 0;
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}
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late_initcall(drmem_init);
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@ -40,6 +40,7 @@
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#include <asm/hvcall.h>
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#include <asm/setup.h>
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#include <asm/vdso.h>
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#include <asm/drmem.h>
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static int numa_enabled = 1;
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@ -179,29 +180,6 @@ static const __be32 *of_get_associativity(struct device_node *dev)
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return of_get_property(dev, "ibm,associativity", NULL);
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}
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/*
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* Returns the property linux,drconf-usable-memory if
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* it exists (the property exists only in kexec/kdump kernels,
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* added by kexec-tools)
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*/
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static const __be32 *of_get_usable_memory(void)
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{
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struct device_node *memory;
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const __be32 *prop;
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u32 len;
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memory = of_find_node_by_path("/ibm,dynamic-reconfiguration-memory");
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if (!memory)
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return NULL;
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prop = of_get_property(memory, "linux,drconf-usable-memory", &len);
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of_node_put(memory);
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if (!prop || len < sizeof(unsigned int))
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return NULL;
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return prop;
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}
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int __node_distance(int a, int b)
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{
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int i;
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@ -395,69 +373,6 @@ static unsigned long read_n_cells(int n, const __be32 **buf)
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return result;
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}
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/*
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* Read the next memblock list entry from the ibm,dynamic-memory property
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* and return the information in the provided of_drconf_cell structure.
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*/
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static void read_drconf_cell(struct of_drconf_cell *drmem, const __be32 **cellp)
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{
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const __be32 *cp;
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drmem->base_addr = read_n_cells(n_mem_addr_cells, cellp);
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cp = *cellp;
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drmem->drc_index = of_read_number(cp, 1);
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drmem->reserved = of_read_number(&cp[1], 1);
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drmem->aa_index = of_read_number(&cp[2], 1);
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drmem->flags = of_read_number(&cp[3], 1);
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*cellp = cp + 4;
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}
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/*
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* Retrieve and validate the ibm,dynamic-memory property of the device tree.
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*
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* The layout of the ibm,dynamic-memory property is a number N of memblock
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* list entries followed by N memblock list entries. Each memblock list entry
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* contains information as laid out in the of_drconf_cell struct above.
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*/
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static int of_get_drconf_memory(struct device_node *memory, const __be32 **dm)
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{
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const __be32 *prop;
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u32 len, entries;
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prop = of_get_property(memory, "ibm,dynamic-memory", &len);
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if (!prop || len < sizeof(unsigned int))
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return 0;
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entries = of_read_number(prop++, 1);
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/* Now that we know the number of entries, revalidate the size
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* of the property read in to ensure we have everything
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*/
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if (len < (entries * (n_mem_addr_cells + 4) + 1) * sizeof(unsigned int))
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return 0;
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*dm = prop;
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return entries;
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}
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/*
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* Retrieve and validate the ibm,lmb-size property for drconf memory
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* from the device tree.
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*/
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static u64 of_get_lmb_size(struct device_node *memory)
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{
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const __be32 *prop;
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u32 len;
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prop = of_get_property(memory, "ibm,lmb-size", &len);
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if (!prop || len < sizeof(unsigned int))
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return 0;
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return read_n_cells(n_mem_size_cells, &prop);
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}
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struct assoc_arrays {
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u32 n_arrays;
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u32 array_sz;
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@ -509,7 +424,7 @@ static int of_get_assoc_arrays(struct assoc_arrays *aa)
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* This is like of_node_to_nid_single() for memory represented in the
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* ibm,dynamic-reconfiguration-memory node.
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*/
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static int of_drconf_to_nid_single(struct of_drconf_cell *drmem)
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static int of_drconf_to_nid_single(struct drmem_lmb *lmb)
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{
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struct assoc_arrays aa = { .arrays = NULL };
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int default_nid = 0;
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@ -521,16 +436,16 @@ static int of_drconf_to_nid_single(struct of_drconf_cell *drmem)
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return default_nid;
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if (min_common_depth > 0 && min_common_depth <= aa.array_sz &&
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!(drmem->flags & DRCONF_MEM_AI_INVALID) &&
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drmem->aa_index < aa.n_arrays) {
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index = drmem->aa_index * aa.array_sz + min_common_depth - 1;
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!(lmb->flags & DRCONF_MEM_AI_INVALID) &&
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lmb->aa_index < aa.n_arrays) {
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index = lmb->aa_index * aa.array_sz + min_common_depth - 1;
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nid = of_read_number(&aa.arrays[index], 1);
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if (nid == 0xffff || nid >= MAX_NUMNODES)
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nid = default_nid;
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if (nid > 0) {
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index = drmem->aa_index * aa.array_sz;
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index = lmb->aa_index * aa.array_sz;
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initialize_distance_lookup_table(nid,
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&aa.arrays[index]);
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}
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@ -665,62 +580,48 @@ static inline int __init read_usm_ranges(const __be32 **usm)
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* Extract NUMA information from the ibm,dynamic-reconfiguration-memory
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* node. This assumes n_mem_{addr,size}_cells have been set.
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*/
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static void __init parse_drconf_memory(struct device_node *memory)
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static void __init numa_setup_drmem_lmb(struct drmem_lmb *lmb,
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const __be32 **usm)
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{
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const __be32 *uninitialized_var(dm), *usm;
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unsigned int n, ranges, is_kexec_kdump = 0;
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unsigned long lmb_size, base, size, sz;
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unsigned int ranges, is_kexec_kdump = 0;
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unsigned long base, size, sz;
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int nid;
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n = of_get_drconf_memory(memory, &dm);
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if (!n)
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/*
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* Skip this block if the reserved bit is set in flags (0x80)
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* or if the block is not assigned to this partition (0x8)
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*/
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if ((lmb->flags & DRCONF_MEM_RESERVED)
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|| !(lmb->flags & DRCONF_MEM_ASSIGNED))
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return;
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lmb_size = of_get_lmb_size(memory);
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if (!lmb_size)
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return;
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/* check if this is a kexec/kdump kernel */
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usm = of_get_usable_memory();
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if (usm != NULL)
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if (*usm)
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is_kexec_kdump = 1;
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for (; n != 0; --n) {
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struct of_drconf_cell drmem;
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base = lmb->base_addr;
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size = drmem_lmb_size();
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ranges = 1;
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read_drconf_cell(&drmem, &dm);
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/* skip this block if the reserved bit is set in flags (0x80)
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or if the block is not assigned to this partition (0x8) */
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if ((drmem.flags & DRCONF_MEM_RESERVED)
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|| !(drmem.flags & DRCONF_MEM_ASSIGNED))
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continue;
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base = drmem.base_addr;
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size = lmb_size;
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ranges = 1;
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if (is_kexec_kdump) {
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ranges = read_usm_ranges(&usm);
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if (!ranges) /* there are no (base, size) duple */
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continue;
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}
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do {
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if (is_kexec_kdump) {
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base = read_n_cells(n_mem_addr_cells, &usm);
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size = read_n_cells(n_mem_size_cells, &usm);
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}
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nid = of_drconf_to_nid_single(&drmem);
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fake_numa_create_new_node(
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((base + size) >> PAGE_SHIFT),
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&nid);
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node_set_online(nid);
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sz = numa_enforce_memory_limit(base, size);
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if (sz)
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memblock_set_node(base, sz,
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&memblock.memory, nid);
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} while (--ranges);
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if (is_kexec_kdump) {
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ranges = read_usm_ranges(usm);
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if (!ranges) /* there are no (base, size) duple */
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return;
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}
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do {
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if (is_kexec_kdump) {
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base = read_n_cells(n_mem_addr_cells, usm);
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size = read_n_cells(n_mem_size_cells, usm);
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}
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nid = of_drconf_to_nid_single(lmb);
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fake_numa_create_new_node(((base + size) >> PAGE_SHIFT),
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&nid);
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node_set_online(nid);
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sz = numa_enforce_memory_limit(base, size);
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if (sz)
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memblock_set_node(base, sz, &memblock.memory, nid);
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} while (--ranges);
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}
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static int __init parse_numa_properties(void)
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@ -815,8 +716,10 @@ new_range:
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* ibm,dynamic-reconfiguration-memory node.
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*/
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memory = of_find_node_by_path("/ibm,dynamic-reconfiguration-memory");
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if (memory)
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parse_drconf_memory(memory);
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if (memory) {
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walk_drmem_lmbs(memory, numa_setup_drmem_lmb);
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of_node_put(memory);
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}
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return 0;
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}
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@ -994,38 +897,26 @@ early_param("topology_updates", early_topology_updates);
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* memory represented in the device tree by the property
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* ibm,dynamic-reconfiguration-memory/ibm,dynamic-memory.
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*/
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static int hot_add_drconf_scn_to_nid(struct device_node *memory,
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unsigned long scn_addr)
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static int hot_add_drconf_scn_to_nid(unsigned long scn_addr)
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{
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const __be32 *dm;
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unsigned int drconf_cell_cnt;
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struct drmem_lmb *lmb;
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unsigned long lmb_size;
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int nid = -1;
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drconf_cell_cnt = of_get_drconf_memory(memory, &dm);
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if (!drconf_cell_cnt)
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return -1;
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lmb_size = of_get_lmb_size(memory);
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if (!lmb_size)
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return -1;
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for (; drconf_cell_cnt != 0; --drconf_cell_cnt) {
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struct of_drconf_cell drmem;
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read_drconf_cell(&drmem, &dm);
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lmb_size = drmem_lmb_size();
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for_each_drmem_lmb(lmb) {
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/* skip this block if it is reserved or not assigned to
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* this partition */
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if ((drmem.flags & DRCONF_MEM_RESERVED)
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|| !(drmem.flags & DRCONF_MEM_ASSIGNED))
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if ((lmb->flags & DRCONF_MEM_RESERVED)
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|| !(lmb->flags & DRCONF_MEM_ASSIGNED))
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continue;
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if ((scn_addr < drmem.base_addr)
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|| (scn_addr >= (drmem.base_addr + lmb_size)))
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if ((scn_addr < lmb->base_addr)
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|| (scn_addr >= (lmb->base_addr + lmb_size)))
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continue;
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nid = of_drconf_to_nid_single(&drmem);
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nid = of_drconf_to_nid_single(lmb);
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break;
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}
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@ -1090,7 +981,7 @@ int hot_add_scn_to_nid(unsigned long scn_addr)
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memory = of_find_node_by_path("/ibm,dynamic-reconfiguration-memory");
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if (memory) {
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nid = hot_add_drconf_scn_to_nid(memory, scn_addr);
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nid = hot_add_drconf_scn_to_nid(scn_addr);
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of_node_put(memory);
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} else {
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nid = hot_add_node_scn_to_nid(scn_addr);
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@ -1106,11 +997,7 @@ static u64 hot_add_drconf_memory_max(void)
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{
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struct device_node *memory = NULL;
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struct device_node *dn = NULL;
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unsigned int drconf_cell_cnt = 0;
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u64 lmb_size = 0;
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const __be32 *dm = NULL;
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const __be64 *lrdr = NULL;
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struct of_drconf_cell drmem;
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dn = of_find_node_by_path("/rtas");
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if (dn) {
|
||||
@ -1122,14 +1009,8 @@ static u64 hot_add_drconf_memory_max(void)
|
||||
|
||||
memory = of_find_node_by_path("/ibm,dynamic-reconfiguration-memory");
|
||||
if (memory) {
|
||||
drconf_cell_cnt = of_get_drconf_memory(memory, &dm);
|
||||
lmb_size = of_get_lmb_size(memory);
|
||||
|
||||
/* Advance to the last cell, each cell has 6 32 bit integers */
|
||||
dm += (drconf_cell_cnt - 1) * 6;
|
||||
read_drconf_cell(&drmem, &dm);
|
||||
of_node_put(memory);
|
||||
return drmem.base_addr + lmb_size;
|
||||
return drmem_lmb_memory_max();
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
Loading…
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Reference in New Issue
Block a user