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openSUSE:Evergreen:11.1:kernel-2.6.32
kexec-tools
kexec-tools-get-details-dynamic-reconfiguration...
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File kexec-tools-get-details-dynamic-reconfiguration-memory-node.diff of Package kexec-tools
From 1d19ca0c4306c3c684cf4d277781975e4ad1c193 Mon Sep 17 00:00:00 2001 From: Chandru <chandru@in.ibm.com> Date: Wed, 24 Sep 2008 17:19:29 +0530 Subject: [PATCH] kexec/kdump : get details of ibm, dynamic-reconfiguration-memory node of device tree Get number of lmb's (logical memory blocks) , size of each lmb from ibm,dynamic-memory property , get base memory ranges from ibm,dynamic-reconfiguration-memory node. Signed-off-by: Chandru Siddalingappa <chandru@in.ibm.com> Signed-off-by: Simon Horman <horms@verge.net.au> Acked-by: Bernhard Walle <bwalle@suse.de> --- kexec/arch/ppc64/kexec-ppc64.c | 145 ++++++++++++++++++++++++++++++++++++----- 1 file changed, 130 insertions(+), 15 deletions(-) --- a/kexec/arch/ppc64/kexec-ppc64.c +++ b/kexec/arch/ppc64/kexec-ppc64.c @@ -96,6 +96,49 @@ err1: } +static int count_dyn_reconf_memory_ranges(void) +{ + char device_tree[] = "/proc/device-tree/"; + char fname[128]; + char buf[32]; + FILE *file; + + strcpy(fname, device_tree); + strcat(fname, "ibm,dynamic-reconfiguration-memory/ibm,lmb-size"); + if ((file = fopen(fname, "r")) == NULL) { + perror(fname); + return -1; + } + + if (fread(buf, 1, 8, file) < 0) { + perror(fname); + fclose(file); + return -1; + } + + lmb_size = ((uint64_t *)buf)[0]; + fclose(file); + + /* Get number of lmbs from ibm,dynamic-memory */ + strcpy(fname, device_tree); + strcat(fname, "ibm,dynamic-reconfiguration-memory/ibm,dynamic-memory"); + if ((file = fopen(fname, "r")) == NULL) { + perror(fname); + return -1; + } + /* + * first 4 bytes provide number of entries(lmbs) + */ + if (fread(buf, 1, 4, file) < 0) { + perror(fname); + fclose(file); + return -1; + } + num_of_lmbs = ((unsigned int *)buf)[0]; + max_memory_ranges += num_of_lmbs; + fclose(file); +} + /* * Count the memory nodes under /proc/device-tree and populate the * max_memory_ranges variable. This variable replaces MAX_MEMORY_RANGES @@ -113,6 +156,12 @@ static int count_memory_ranges(void) } while ((dentry = readdir(dir)) != NULL) { + if (!strncmp(dentry->d_name, + "ibm,dynamic-reconfiguration-memory", 35)){ + count_dyn_reconf_memory_ranges(); + continue; + } + if (strncmp(dentry->d_name, "memory@", 7) && strcmp(dentry->d_name, "memory") && strncmp(dentry->d_name, "pci@", 4)) @@ -128,7 +177,52 @@ static int count_memory_ranges(void) return 0; } +static void add_base_memory_range(uint64_t start, uint64_t end) +{ + base_memory_range[nr_memory_ranges].start = start; + base_memory_range[nr_memory_ranges].end = end; + base_memory_range[nr_memory_ranges].type = RANGE_RAM; + nr_memory_ranges++; + + dbgprintf("%016llx-%016llx : %x\n", + base_memory_range[nr_memory_ranges-1].start, + base_memory_range[nr_memory_ranges-1].end, + base_memory_range[nr_memory_ranges-1].type); +} + +static int get_dyn_reconf_base_ranges(void) +{ + uint64_t start, end; + char fname[128], buf[32]; + FILE *file; + int i, n; + + strcpy(fname, "/proc/device-tree/"); + strcat(fname, + "ibm,dynamic-reconfiguration-memory/ibm,dynamic-memory"); + if ((file = fopen(fname, "r")) == NULL) { + perror(fname); + return -1; + } + + fseek(file, 4, SEEK_SET); + for (i = 0; i < num_of_lmbs; i++) { + if ((n = fread(buf, 1, 24, file)) < 0) { + perror(fname); + fclose(file); + return -1; + } + if (nr_memory_ranges >= max_memory_ranges) + return -1; + + start = ((uint64_t *)buf)[0]; + end = start + lmb_size; + add_base_memory_range(start, end); + } + fclose(file); + return 0; +} /* Sort the base ranges in memory - this is useful for ensuring that our * ranges are in ascending order, even if device-tree read of memory nodes * is done differently. Also, could be used for other range coalescing later @@ -156,7 +250,7 @@ static int sort_base_ranges(void) /* Get base memory ranges */ static int get_base_ranges(void) { - int local_memory_ranges = 0; + uint64_t start, end; char device_tree[256] = "/proc/device-tree/"; char fname[256]; char buf[MAXBYTES]; @@ -170,6 +264,11 @@ static int get_base_ranges(void) return -1; } while ((dentry = readdir(dir)) != NULL) { + if (!strncmp(dentry->d_name, + "ibm,dynamic-reconfiguration-memory", 35)) { + get_dyn_reconf_base_ranges(); + continue; + } if (strncmp(dentry->d_name, "memory@", 7) && strcmp(dentry->d_name, "memory")) continue; @@ -197,27 +296,18 @@ static int get_base_ranges(void) closedir(dir); return -1; } - if (local_memory_ranges >= max_memory_ranges) { + if (nr_memory_ranges >= max_memory_ranges) { fclose(file); break; } - base_memory_range[local_memory_ranges].start = - ((uint64_t *)buf)[0]; - base_memory_range[local_memory_ranges].end = - base_memory_range[local_memory_ranges].start + - ((uint64_t *)buf)[1]; - base_memory_range[local_memory_ranges].type = RANGE_RAM; - local_memory_ranges++; - dbgprintf("%016llx-%016llx : %x\n", - base_memory_range[local_memory_ranges-1].start, - base_memory_range[local_memory_ranges-1].end, - base_memory_range[local_memory_ranges-1].type); + start = ((uint64_t *)buf)[0]; + end = start + ((uint64_t *)buf)[1]; + add_base_memory_range(start, end); fclose(file); } closedir(dmem); } closedir(dir); - nr_memory_ranges = local_memory_ranges; sort_base_ranges(); memory_max = base_memory_range[nr_memory_ranges - 1].end; #ifdef DEBUG @@ -276,7 +366,9 @@ static int get_devtree_details(unsigned strncmp(dentry->d_name, "memory@", 7) && strcmp(dentry->d_name, "memory") && strncmp(dentry->d_name, "pci@", 4) && - strncmp(dentry->d_name, "rtas", 4)) + strncmp(dentry->d_name, "rtas", 4) && + strncmp(dentry->d_name, + "ibm,dynamic-reconfiguration-memory", 35)) continue; strcpy(fname, device_tree); strcat(fname, dentry->d_name); @@ -474,6 +566,29 @@ static int get_devtree_details(unsigned closedir(cdir); } /* memory */ + if (!strncmp(dentry->d_name, + "ibm,dynamic-reconfiguration-memory", 35)) { + unsigned int k; + strcat(fname, "/ibm,dynamic-memory"); + if ((file = fopen(fname, "r")) == NULL) { + perror(fname); + goto error_opencdir; + } + fseek(file, 4, SEEK_SET); + for (k = 0; k < num_of_lmbs; k++) { + if ((n = fread(buf, 1, 24, file)) < 0) { + perror(fname); + goto error_openfile; + } + rmo_base = ((uint64_t *)buf)[0]; + rmo_top = rmo_base + lmb_size; + if (rmo_top > 0x30000000UL) + rmo_top = 0x30000000UL; + } + fclose(file); + closedir(cdir); + } /* ibm,dynamic-reconfiguration-memory */ + if (strncmp(dentry->d_name, "pci@", 4) == 0) { strcat(fname, "/linux,tce-base"); if ((file = fopen(fname, "r")) == NULL) {
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