1b5beae5eSOliver O'Halloran // SPDX-License-Identifier: GPL-2.0 2b5beae5eSOliver O'Halloran 3b5beae5eSOliver O'Halloran #define pr_fmt(fmt) "papr-scm: " fmt 4b5beae5eSOliver O'Halloran 5b5beae5eSOliver O'Halloran #include <linux/of.h> 6b5beae5eSOliver O'Halloran #include <linux/kernel.h> 7b5beae5eSOliver O'Halloran #include <linux/module.h> 8b5beae5eSOliver O'Halloran #include <linux/ioport.h> 9b5beae5eSOliver O'Halloran #include <linux/slab.h> 10b5beae5eSOliver O'Halloran #include <linux/ndctl.h> 11b5beae5eSOliver O'Halloran #include <linux/sched.h> 12b5beae5eSOliver O'Halloran #include <linux/libnvdimm.h> 13b5beae5eSOliver O'Halloran #include <linux/platform_device.h> 140d7fc080SVaibhav Jain #include <linux/delay.h> 15b791abf3SVaibhav Jain #include <linux/seq_buf.h> 1685343a8dSSantosh Sivaraj #include <linux/nd.h> 17b5beae5eSOliver O'Halloran 18b5beae5eSOliver O'Halloran #include <asm/plpar_wrappers.h> 19dbc8fc9dSShivaprasad G Bhat #include <uapi/linux/papr_pdsm.h> 20dbc8fc9dSShivaprasad G Bhat #include <linux/papr_scm.h> 2185343a8dSSantosh Sivaraj #include <asm/mce.h> 220e8554b5SAndy Shevchenko #include <asm/unaligned.h> 234c08d4bbSKajol Jain #include <linux/perf_event.h> 24b5beae5eSOliver O'Halloran 25b5beae5eSOliver O'Halloran #define BIND_ANY_ADDR (~0ul) 26b5beae5eSOliver O'Halloran 27b5beae5eSOliver O'Halloran #define PAPR_SCM_DIMM_CMD_MASK \ 28b5beae5eSOliver O'Halloran ((1ul << ND_CMD_GET_CONFIG_SIZE) | \ 29b5beae5eSOliver O'Halloran (1ul << ND_CMD_GET_CONFIG_DATA) | \ 30f517f792SVaibhav Jain (1ul << ND_CMD_SET_CONFIG_DATA) | \ 31f517f792SVaibhav Jain (1ul << ND_CMD_CALL)) 32b5beae5eSOliver O'Halloran 332d02bf83SVaibhav Jain /* Struct holding a single performance metric */ 342d02bf83SVaibhav Jain struct papr_scm_perf_stat { 352d02bf83SVaibhav Jain u8 stat_id[8]; 362d02bf83SVaibhav Jain __be64 stat_val; 372d02bf83SVaibhav Jain } __packed; 382d02bf83SVaibhav Jain 392d02bf83SVaibhav Jain /* Struct exchanged between kernel and PHYP for fetching drc perf stats */ 402d02bf83SVaibhav Jain struct papr_scm_perf_stats { 412d02bf83SVaibhav Jain u8 eye_catcher[8]; 422d02bf83SVaibhav Jain /* Should be PAPR_SCM_PERF_STATS_VERSION */ 432d02bf83SVaibhav Jain __be32 stats_version; 442d02bf83SVaibhav Jain /* Number of stats following */ 452d02bf83SVaibhav Jain __be32 num_statistics; 462d02bf83SVaibhav Jain /* zero or more performance matrics */ 472d02bf83SVaibhav Jain struct papr_scm_perf_stat scm_statistic[]; 482d02bf83SVaibhav Jain } __packed; 492d02bf83SVaibhav Jain 50b791abf3SVaibhav Jain /* private struct associated with each region */ 51b5beae5eSOliver O'Halloran struct papr_scm_priv { 52b5beae5eSOliver O'Halloran struct platform_device *pdev; 53b5beae5eSOliver O'Halloran struct device_node *dn; 54b5beae5eSOliver O'Halloran uint32_t drc_index; 55b5beae5eSOliver O'Halloran uint64_t blocks; 56b5beae5eSOliver O'Halloran uint64_t block_size; 57b5beae5eSOliver O'Halloran int metadata_size; 582a0ffbd4SAneesh Kumar K.V bool is_volatile; 5975b7c05eSShivaprasad G Bhat bool hcall_flush_required; 60b5beae5eSOliver O'Halloran 61b5beae5eSOliver O'Halloran uint64_t bound_addr; 62b5beae5eSOliver O'Halloran 63b5beae5eSOliver O'Halloran struct nvdimm_bus_descriptor bus_desc; 64b5beae5eSOliver O'Halloran struct nvdimm_bus *bus; 65b5beae5eSOliver O'Halloran struct nvdimm *nvdimm; 66b5beae5eSOliver O'Halloran struct resource res; 67b5beae5eSOliver O'Halloran struct nd_region *region; 68b5beae5eSOliver O'Halloran struct nd_interleave_set nd_set; 6985343a8dSSantosh Sivaraj struct list_head region_list; 70b791abf3SVaibhav Jain 71b791abf3SVaibhav Jain /* Protect dimm health data from concurrent read/writes */ 72b791abf3SVaibhav Jain struct mutex health_mutex; 73b791abf3SVaibhav Jain 74b791abf3SVaibhav Jain /* Last time the health information of the dimm was updated */ 75b791abf3SVaibhav Jain unsigned long lasthealth_jiffies; 76b791abf3SVaibhav Jain 77b791abf3SVaibhav Jain /* Health information for the dimm */ 78b791abf3SVaibhav Jain u64 health_bitmap; 792d02bf83SVaibhav Jain 80de21e137SVaibhav Jain /* Holds the last known dirty shutdown counter value */ 81de21e137SVaibhav Jain u64 dirty_shutdown_counter; 82de21e137SVaibhav Jain 832d02bf83SVaibhav Jain /* length of the stat buffer as expected by phyp */ 842d02bf83SVaibhav Jain size_t stat_buffer_len; 85bbbca723SVaibhav Jain 86bbbca723SVaibhav Jain /* The bits which needs to be overridden */ 87bbbca723SVaibhav Jain u64 health_bitmap_inject_mask; 88b5beae5eSOliver O'Halloran }; 89b5beae5eSOliver O'Halloran 9075b7c05eSShivaprasad G Bhat static int papr_scm_pmem_flush(struct nd_region *nd_region, 9175b7c05eSShivaprasad G Bhat struct bio *bio __maybe_unused) 9275b7c05eSShivaprasad G Bhat { 9375b7c05eSShivaprasad G Bhat struct papr_scm_priv *p = nd_region_provider_data(nd_region); 9475b7c05eSShivaprasad G Bhat unsigned long ret_buf[PLPAR_HCALL_BUFSIZE], token = 0; 9575b7c05eSShivaprasad G Bhat long rc; 9675b7c05eSShivaprasad G Bhat 9775b7c05eSShivaprasad G Bhat dev_dbg(&p->pdev->dev, "flush drc 0x%x", p->drc_index); 9875b7c05eSShivaprasad G Bhat 9975b7c05eSShivaprasad G Bhat do { 10075b7c05eSShivaprasad G Bhat rc = plpar_hcall(H_SCM_FLUSH, ret_buf, p->drc_index, token); 10175b7c05eSShivaprasad G Bhat token = ret_buf[0]; 10275b7c05eSShivaprasad G Bhat 10375b7c05eSShivaprasad G Bhat /* Check if we are stalled for some time */ 10475b7c05eSShivaprasad G Bhat if (H_IS_LONG_BUSY(rc)) { 10575b7c05eSShivaprasad G Bhat msleep(get_longbusy_msecs(rc)); 10675b7c05eSShivaprasad G Bhat rc = H_BUSY; 10775b7c05eSShivaprasad G Bhat } else if (rc == H_BUSY) { 10875b7c05eSShivaprasad G Bhat cond_resched(); 10975b7c05eSShivaprasad G Bhat } 11075b7c05eSShivaprasad G Bhat } while (rc == H_BUSY); 11175b7c05eSShivaprasad G Bhat 11275b7c05eSShivaprasad G Bhat if (rc) { 1137767d9acSMichael Ellerman dev_err(&p->pdev->dev, "flush error: %ld", rc); 11475b7c05eSShivaprasad G Bhat rc = -EIO; 11575b7c05eSShivaprasad G Bhat } else { 11675b7c05eSShivaprasad G Bhat dev_dbg(&p->pdev->dev, "flush drc 0x%x complete", p->drc_index); 11775b7c05eSShivaprasad G Bhat } 11875b7c05eSShivaprasad G Bhat 11975b7c05eSShivaprasad G Bhat return rc; 12075b7c05eSShivaprasad G Bhat } 12175b7c05eSShivaprasad G Bhat 12219a551b2SWei Yongjun static LIST_HEAD(papr_nd_regions); 12319a551b2SWei Yongjun static DEFINE_MUTEX(papr_ndr_lock); 12485343a8dSSantosh Sivaraj 125b5beae5eSOliver O'Halloran static int drc_pmem_bind(struct papr_scm_priv *p) 126b5beae5eSOliver O'Halloran { 127b5beae5eSOliver O'Halloran unsigned long ret[PLPAR_HCALL_BUFSIZE]; 1285a3840a4SOliver O'Halloran uint64_t saved = 0; 1293a855b7aSVaibhav Jain uint64_t token; 1303a855b7aSVaibhav Jain int64_t rc; 131b5beae5eSOliver O'Halloran 132b5beae5eSOliver O'Halloran /* 133b5beae5eSOliver O'Halloran * When the hypervisor cannot map all the requested memory in a single 134b5beae5eSOliver O'Halloran * hcall it returns H_BUSY and we call again with the token until 135b5beae5eSOliver O'Halloran * we get H_SUCCESS. Aborting the retry loop before getting H_SUCCESS 136b5beae5eSOliver O'Halloran * leave the system in an undefined state, so we wait. 137b5beae5eSOliver O'Halloran */ 138b5beae5eSOliver O'Halloran token = 0; 139b5beae5eSOliver O'Halloran 140b5beae5eSOliver O'Halloran do { 141b5beae5eSOliver O'Halloran rc = plpar_hcall(H_SCM_BIND_MEM, ret, p->drc_index, 0, 142b5beae5eSOliver O'Halloran p->blocks, BIND_ANY_ADDR, token); 143409dd7dcSOliver O'Halloran token = ret[0]; 1445a3840a4SOliver O'Halloran if (!saved) 1455a3840a4SOliver O'Halloran saved = ret[1]; 146b5beae5eSOliver O'Halloran cond_resched(); 147b5beae5eSOliver O'Halloran } while (rc == H_BUSY); 148b5beae5eSOliver O'Halloran 149faa6d211SAneesh Kumar K.V if (rc) 1504111cdefSAneesh Kumar K.V return rc; 151b5beae5eSOliver O'Halloran 1525a3840a4SOliver O'Halloran p->bound_addr = saved; 1530eb59382SAneesh Kumar K.V dev_dbg(&p->pdev->dev, "bound drc 0x%x to 0x%lx\n", 1540eb59382SAneesh Kumar K.V p->drc_index, (unsigned long)saved); 1554111cdefSAneesh Kumar K.V return rc; 156b5beae5eSOliver O'Halloran } 157b5beae5eSOliver O'Halloran 1584111cdefSAneesh Kumar K.V static void drc_pmem_unbind(struct papr_scm_priv *p) 159b5beae5eSOliver O'Halloran { 160b5beae5eSOliver O'Halloran unsigned long ret[PLPAR_HCALL_BUFSIZE]; 1610d7fc080SVaibhav Jain uint64_t token = 0; 1620d7fc080SVaibhav Jain int64_t rc; 163b5beae5eSOliver O'Halloran 1644111cdefSAneesh Kumar K.V dev_dbg(&p->pdev->dev, "unbind drc 0x%x\n", p->drc_index); 165b5beae5eSOliver O'Halloran 1660d7fc080SVaibhav Jain /* NB: unbind has the same retry requirements as drc_pmem_bind() */ 167b5beae5eSOliver O'Halloran do { 1680d7fc080SVaibhav Jain 1690d7fc080SVaibhav Jain /* Unbind of all SCM resources associated with drcIndex */ 1700d7fc080SVaibhav Jain rc = plpar_hcall(H_SCM_UNBIND_ALL, ret, H_UNBIND_SCOPE_DRC, 1710d7fc080SVaibhav Jain p->drc_index, token); 172409dd7dcSOliver O'Halloran token = ret[0]; 1730d7fc080SVaibhav Jain 1740d7fc080SVaibhav Jain /* Check if we are stalled for some time */ 1750d7fc080SVaibhav Jain if (H_IS_LONG_BUSY(rc)) { 1760d7fc080SVaibhav Jain msleep(get_longbusy_msecs(rc)); 1770d7fc080SVaibhav Jain rc = H_BUSY; 1780d7fc080SVaibhav Jain } else if (rc == H_BUSY) { 179b5beae5eSOliver O'Halloran cond_resched(); 1800d7fc080SVaibhav Jain } 1810d7fc080SVaibhav Jain 182b5beae5eSOliver O'Halloran } while (rc == H_BUSY); 183b5beae5eSOliver O'Halloran 184b5beae5eSOliver O'Halloran if (rc) 185b5beae5eSOliver O'Halloran dev_err(&p->pdev->dev, "unbind error: %lld\n", rc); 1860d7fc080SVaibhav Jain else 1874111cdefSAneesh Kumar K.V dev_dbg(&p->pdev->dev, "unbind drc 0x%x complete\n", 1880d7fc080SVaibhav Jain p->drc_index); 189b5beae5eSOliver O'Halloran 1904111cdefSAneesh Kumar K.V return; 191b5beae5eSOliver O'Halloran } 192b5beae5eSOliver O'Halloran 193faa6d211SAneesh Kumar K.V static int drc_pmem_query_n_bind(struct papr_scm_priv *p) 194faa6d211SAneesh Kumar K.V { 195faa6d211SAneesh Kumar K.V unsigned long start_addr; 196faa6d211SAneesh Kumar K.V unsigned long end_addr; 197faa6d211SAneesh Kumar K.V unsigned long ret[PLPAR_HCALL_BUFSIZE]; 198faa6d211SAneesh Kumar K.V int64_t rc; 199faa6d211SAneesh Kumar K.V 200faa6d211SAneesh Kumar K.V 201faa6d211SAneesh Kumar K.V rc = plpar_hcall(H_SCM_QUERY_BLOCK_MEM_BINDING, ret, 202faa6d211SAneesh Kumar K.V p->drc_index, 0); 203faa6d211SAneesh Kumar K.V if (rc) 204faa6d211SAneesh Kumar K.V goto err_out; 205faa6d211SAneesh Kumar K.V start_addr = ret[0]; 206faa6d211SAneesh Kumar K.V 207faa6d211SAneesh Kumar K.V /* Make sure the full region is bound. */ 208faa6d211SAneesh Kumar K.V rc = plpar_hcall(H_SCM_QUERY_BLOCK_MEM_BINDING, ret, 209faa6d211SAneesh Kumar K.V p->drc_index, p->blocks - 1); 210faa6d211SAneesh Kumar K.V if (rc) 211faa6d211SAneesh Kumar K.V goto err_out; 212faa6d211SAneesh Kumar K.V end_addr = ret[0]; 213faa6d211SAneesh Kumar K.V 214faa6d211SAneesh Kumar K.V if ((end_addr - start_addr) != ((p->blocks - 1) * p->block_size)) 215faa6d211SAneesh Kumar K.V goto err_out; 216faa6d211SAneesh Kumar K.V 217faa6d211SAneesh Kumar K.V p->bound_addr = start_addr; 2180eb59382SAneesh Kumar K.V dev_dbg(&p->pdev->dev, "bound drc 0x%x to 0x%lx\n", p->drc_index, start_addr); 219faa6d211SAneesh Kumar K.V return rc; 220faa6d211SAneesh Kumar K.V 221faa6d211SAneesh Kumar K.V err_out: 222faa6d211SAneesh Kumar K.V dev_info(&p->pdev->dev, 223faa6d211SAneesh Kumar K.V "Failed to query, trying an unbind followed by bind"); 224faa6d211SAneesh Kumar K.V drc_pmem_unbind(p); 225faa6d211SAneesh Kumar K.V return drc_pmem_bind(p); 226faa6d211SAneesh Kumar K.V } 227faa6d211SAneesh Kumar K.V 228b791abf3SVaibhav Jain /* 2292d02bf83SVaibhav Jain * Query the Dimm performance stats from PHYP and copy them (if returned) to 2302d02bf83SVaibhav Jain * provided struct papr_scm_perf_stats instance 'stats' that can hold atleast 2312d02bf83SVaibhav Jain * (num_stats + header) bytes. 232d2827e5eSKajol Jain * - If buff_stats == NULL the return value is the size in bytes of the buffer 2332d02bf83SVaibhav Jain * needed to hold all supported performance-statistics. 2342d02bf83SVaibhav Jain * - If buff_stats != NULL and num_stats == 0 then we copy all known 2352d02bf83SVaibhav Jain * performance-statistics to 'buff_stat' and expect to be large enough to 2362d02bf83SVaibhav Jain * hold them. 2372d02bf83SVaibhav Jain * - if buff_stats != NULL and num_stats > 0 then copy the requested 2382d02bf83SVaibhav Jain * performance-statistics to buff_stats. 2392d02bf83SVaibhav Jain */ 2402d02bf83SVaibhav Jain static ssize_t drc_pmem_query_stats(struct papr_scm_priv *p, 2412d02bf83SVaibhav Jain struct papr_scm_perf_stats *buff_stats, 2422d02bf83SVaibhav Jain unsigned int num_stats) 2432d02bf83SVaibhav Jain { 2442d02bf83SVaibhav Jain unsigned long ret[PLPAR_HCALL_BUFSIZE]; 2452d02bf83SVaibhav Jain size_t size; 2462d02bf83SVaibhav Jain s64 rc; 2472d02bf83SVaibhav Jain 2482d02bf83SVaibhav Jain /* Setup the out buffer */ 2492d02bf83SVaibhav Jain if (buff_stats) { 2502d02bf83SVaibhav Jain memcpy(buff_stats->eye_catcher, 2512d02bf83SVaibhav Jain PAPR_SCM_PERF_STATS_EYECATCHER, 8); 2522d02bf83SVaibhav Jain buff_stats->stats_version = 2532d02bf83SVaibhav Jain cpu_to_be32(PAPR_SCM_PERF_STATS_VERSION); 2542d02bf83SVaibhav Jain buff_stats->num_statistics = 2552d02bf83SVaibhav Jain cpu_to_be32(num_stats); 2562d02bf83SVaibhav Jain 2572d02bf83SVaibhav Jain /* 2582d02bf83SVaibhav Jain * Calculate the buffer size based on num-stats provided 2592d02bf83SVaibhav Jain * or use the prefetched max buffer length 2602d02bf83SVaibhav Jain */ 2612d02bf83SVaibhav Jain if (num_stats) 2622d02bf83SVaibhav Jain /* Calculate size from the num_stats */ 2632d02bf83SVaibhav Jain size = sizeof(struct papr_scm_perf_stats) + 2642d02bf83SVaibhav Jain num_stats * sizeof(struct papr_scm_perf_stat); 2652d02bf83SVaibhav Jain else 2662d02bf83SVaibhav Jain size = p->stat_buffer_len; 2672d02bf83SVaibhav Jain } else { 2682d02bf83SVaibhav Jain /* In case of no out buffer ignore the size */ 2692d02bf83SVaibhav Jain size = 0; 2702d02bf83SVaibhav Jain } 2712d02bf83SVaibhav Jain 2722d02bf83SVaibhav Jain /* Do the HCALL asking PHYP for info */ 2732d02bf83SVaibhav Jain rc = plpar_hcall(H_SCM_PERFORMANCE_STATS, ret, p->drc_index, 2742d02bf83SVaibhav Jain buff_stats ? virt_to_phys(buff_stats) : 0, 2752d02bf83SVaibhav Jain size); 2762d02bf83SVaibhav Jain 2772d02bf83SVaibhav Jain /* Check if the error was due to an unknown stat-id */ 2782d02bf83SVaibhav Jain if (rc == H_PARTIAL) { 2792d02bf83SVaibhav Jain dev_err(&p->pdev->dev, 2802d02bf83SVaibhav Jain "Unknown performance stats, Err:0x%016lX\n", ret[0]); 2812d02bf83SVaibhav Jain return -ENOENT; 282f3f6d184SVaibhav Jain } else if (rc == H_AUTHORITY) { 283f3f6d184SVaibhav Jain dev_info(&p->pdev->dev, 284f3f6d184SVaibhav Jain "Permission denied while accessing performance stats"); 285f3f6d184SVaibhav Jain return -EPERM; 286f3f6d184SVaibhav Jain } else if (rc == H_UNSUPPORTED) { 287f3f6d184SVaibhav Jain dev_dbg(&p->pdev->dev, "Performance stats unsupported\n"); 288f3f6d184SVaibhav Jain return -EOPNOTSUPP; 2892d02bf83SVaibhav Jain } else if (rc != H_SUCCESS) { 2902d02bf83SVaibhav Jain dev_err(&p->pdev->dev, 2912d02bf83SVaibhav Jain "Failed to query performance stats, Err:%lld\n", rc); 2922d02bf83SVaibhav Jain return -EIO; 2932d02bf83SVaibhav Jain 2942d02bf83SVaibhav Jain } else if (!size) { 2952d02bf83SVaibhav Jain /* Handle case where stat buffer size was requested */ 2962d02bf83SVaibhav Jain dev_dbg(&p->pdev->dev, 2972d02bf83SVaibhav Jain "Performance stats size %ld\n", ret[0]); 2982d02bf83SVaibhav Jain return ret[0]; 2992d02bf83SVaibhav Jain } 3002d02bf83SVaibhav Jain 3012d02bf83SVaibhav Jain /* Successfully fetched the requested stats from phyp */ 3022d02bf83SVaibhav Jain dev_dbg(&p->pdev->dev, 3032d02bf83SVaibhav Jain "Performance stats returned %d stats\n", 3042d02bf83SVaibhav Jain be32_to_cpu(buff_stats->num_statistics)); 3052d02bf83SVaibhav Jain return 0; 3062d02bf83SVaibhav Jain } 3072d02bf83SVaibhav Jain 308d0007eb1SKajol Jain #ifdef CONFIG_PERF_EVENTS 309d0007eb1SKajol Jain #define to_nvdimm_pmu(_pmu) container_of(_pmu, struct nvdimm_pmu, pmu) 310d0007eb1SKajol Jain 3119b1ac046SKajol Jain static const char * const nvdimm_events_map[] = { 3129b1ac046SKajol Jain [1] = "CtlResCt", 3139b1ac046SKajol Jain [2] = "CtlResTm", 3149b1ac046SKajol Jain [3] = "PonSecs ", 3159b1ac046SKajol Jain [4] = "MemLife ", 3169b1ac046SKajol Jain [5] = "CritRscU", 3179b1ac046SKajol Jain [6] = "HostLCnt", 3189b1ac046SKajol Jain [7] = "HostSCnt", 3199b1ac046SKajol Jain [8] = "HostSDur", 3209b1ac046SKajol Jain [9] = "HostLDur", 3219b1ac046SKajol Jain [10] = "MedRCnt ", 3229b1ac046SKajol Jain [11] = "MedWCnt ", 3239b1ac046SKajol Jain [12] = "MedRDur ", 3249b1ac046SKajol Jain [13] = "MedWDur ", 3259b1ac046SKajol Jain [14] = "CchRHCnt", 3269b1ac046SKajol Jain [15] = "CchWHCnt", 3279b1ac046SKajol Jain [16] = "FastWCnt", 3289b1ac046SKajol Jain }; 3299b1ac046SKajol Jain 3304c08d4bbSKajol Jain static int papr_scm_pmu_get_value(struct perf_event *event, struct device *dev, u64 *count) 3314c08d4bbSKajol Jain { 3324c08d4bbSKajol Jain struct papr_scm_perf_stat *stat; 3334c08d4bbSKajol Jain struct papr_scm_perf_stats *stats; 334d9abe36dSHaowen Bai struct papr_scm_priv *p = dev_get_drvdata(dev); 3354c08d4bbSKajol Jain int rc, size; 3364c08d4bbSKajol Jain 3379b1ac046SKajol Jain /* Invalid eventcode */ 3389b1ac046SKajol Jain if (event->attr.config == 0 || event->attr.config >= ARRAY_SIZE(nvdimm_events_map)) 3399b1ac046SKajol Jain return -EINVAL; 3409b1ac046SKajol Jain 3414c08d4bbSKajol Jain /* Allocate request buffer enough to hold single performance stat */ 3424c08d4bbSKajol Jain size = sizeof(struct papr_scm_perf_stats) + 3434c08d4bbSKajol Jain sizeof(struct papr_scm_perf_stat); 3444c08d4bbSKajol Jain 3459b1ac046SKajol Jain if (!p) 3464c08d4bbSKajol Jain return -EINVAL; 3474c08d4bbSKajol Jain 3484c08d4bbSKajol Jain stats = kzalloc(size, GFP_KERNEL); 3494c08d4bbSKajol Jain if (!stats) 3504c08d4bbSKajol Jain return -ENOMEM; 3514c08d4bbSKajol Jain 3524c08d4bbSKajol Jain stat = &stats->scm_statistic[0]; 3534c08d4bbSKajol Jain memcpy(&stat->stat_id, 3549b1ac046SKajol Jain nvdimm_events_map[event->attr.config], 3554c08d4bbSKajol Jain sizeof(stat->stat_id)); 3564c08d4bbSKajol Jain stat->stat_val = 0; 3574c08d4bbSKajol Jain 3584c08d4bbSKajol Jain rc = drc_pmem_query_stats(p, stats, 1); 3594c08d4bbSKajol Jain if (rc < 0) { 3604c08d4bbSKajol Jain kfree(stats); 3614c08d4bbSKajol Jain return rc; 3624c08d4bbSKajol Jain } 3634c08d4bbSKajol Jain 3644c08d4bbSKajol Jain *count = be64_to_cpu(stat->stat_val); 3654c08d4bbSKajol Jain kfree(stats); 3664c08d4bbSKajol Jain return 0; 3674c08d4bbSKajol Jain } 3684c08d4bbSKajol Jain 3694c08d4bbSKajol Jain static int papr_scm_pmu_event_init(struct perf_event *event) 3704c08d4bbSKajol Jain { 3714c08d4bbSKajol Jain struct nvdimm_pmu *nd_pmu = to_nvdimm_pmu(event->pmu); 3724c08d4bbSKajol Jain struct papr_scm_priv *p; 3734c08d4bbSKajol Jain 3744c08d4bbSKajol Jain if (!nd_pmu) 3754c08d4bbSKajol Jain return -EINVAL; 3764c08d4bbSKajol Jain 3774c08d4bbSKajol Jain /* test the event attr type for PMU enumeration */ 3784c08d4bbSKajol Jain if (event->attr.type != event->pmu->type) 3794c08d4bbSKajol Jain return -ENOENT; 3804c08d4bbSKajol Jain 3814c08d4bbSKajol Jain /* it does not support event sampling mode */ 3824c08d4bbSKajol Jain if (is_sampling_event(event)) 3834c08d4bbSKajol Jain return -EOPNOTSUPP; 3844c08d4bbSKajol Jain 3854c08d4bbSKajol Jain /* no branch sampling */ 3864c08d4bbSKajol Jain if (has_branch_stack(event)) 3874c08d4bbSKajol Jain return -EOPNOTSUPP; 3884c08d4bbSKajol Jain 3894c08d4bbSKajol Jain p = (struct papr_scm_priv *)nd_pmu->dev->driver_data; 3904c08d4bbSKajol Jain if (!p) 3914c08d4bbSKajol Jain return -EINVAL; 3924c08d4bbSKajol Jain 3934c08d4bbSKajol Jain /* Invalid eventcode */ 3944c08d4bbSKajol Jain if (event->attr.config == 0 || event->attr.config > 16) 3954c08d4bbSKajol Jain return -EINVAL; 3964c08d4bbSKajol Jain 3974c08d4bbSKajol Jain return 0; 3984c08d4bbSKajol Jain } 3994c08d4bbSKajol Jain 4004c08d4bbSKajol Jain static int papr_scm_pmu_add(struct perf_event *event, int flags) 4014c08d4bbSKajol Jain { 4024c08d4bbSKajol Jain u64 count; 4034c08d4bbSKajol Jain int rc; 4044c08d4bbSKajol Jain struct nvdimm_pmu *nd_pmu = to_nvdimm_pmu(event->pmu); 4054c08d4bbSKajol Jain 4064c08d4bbSKajol Jain if (!nd_pmu) 4074c08d4bbSKajol Jain return -EINVAL; 4084c08d4bbSKajol Jain 4094c08d4bbSKajol Jain if (flags & PERF_EF_START) { 4104c08d4bbSKajol Jain rc = papr_scm_pmu_get_value(event, nd_pmu->dev, &count); 4114c08d4bbSKajol Jain if (rc) 4124c08d4bbSKajol Jain return rc; 4134c08d4bbSKajol Jain 4144c08d4bbSKajol Jain local64_set(&event->hw.prev_count, count); 4154c08d4bbSKajol Jain } 4164c08d4bbSKajol Jain 4174c08d4bbSKajol Jain return 0; 4184c08d4bbSKajol Jain } 4194c08d4bbSKajol Jain 4204c08d4bbSKajol Jain static void papr_scm_pmu_read(struct perf_event *event) 4214c08d4bbSKajol Jain { 4224c08d4bbSKajol Jain u64 prev, now; 4234c08d4bbSKajol Jain int rc; 4244c08d4bbSKajol Jain struct nvdimm_pmu *nd_pmu = to_nvdimm_pmu(event->pmu); 4254c08d4bbSKajol Jain 4264c08d4bbSKajol Jain if (!nd_pmu) 4274c08d4bbSKajol Jain return; 4284c08d4bbSKajol Jain 4294c08d4bbSKajol Jain rc = papr_scm_pmu_get_value(event, nd_pmu->dev, &now); 4304c08d4bbSKajol Jain if (rc) 4314c08d4bbSKajol Jain return; 4324c08d4bbSKajol Jain 4334c08d4bbSKajol Jain prev = local64_xchg(&event->hw.prev_count, now); 4344c08d4bbSKajol Jain local64_add(now - prev, &event->count); 4354c08d4bbSKajol Jain } 4364c08d4bbSKajol Jain 4374c08d4bbSKajol Jain static void papr_scm_pmu_del(struct perf_event *event, int flags) 4384c08d4bbSKajol Jain { 4394c08d4bbSKajol Jain papr_scm_pmu_read(event); 4404c08d4bbSKajol Jain } 4414c08d4bbSKajol Jain 4424c08d4bbSKajol Jain static void papr_scm_pmu_register(struct papr_scm_priv *p) 4434c08d4bbSKajol Jain { 4444c08d4bbSKajol Jain struct nvdimm_pmu *nd_pmu; 4454c08d4bbSKajol Jain int rc, nodeid; 4464c08d4bbSKajol Jain 4474c08d4bbSKajol Jain nd_pmu = kzalloc(sizeof(*nd_pmu), GFP_KERNEL); 4484c08d4bbSKajol Jain if (!nd_pmu) { 4494c08d4bbSKajol Jain rc = -ENOMEM; 4504c08d4bbSKajol Jain goto pmu_err_print; 4514c08d4bbSKajol Jain } 4524c08d4bbSKajol Jain 4536cf07810SNathan Chancellor if (!p->stat_buffer_len) { 4546cf07810SNathan Chancellor rc = -ENOENT; 4554c08d4bbSKajol Jain goto pmu_check_events_err; 4566cf07810SNathan Chancellor } 4574c08d4bbSKajol Jain 4584c08d4bbSKajol Jain nd_pmu->pmu.task_ctx_nr = perf_invalid_context; 4594c08d4bbSKajol Jain nd_pmu->pmu.name = nvdimm_name(p->nvdimm); 4604c08d4bbSKajol Jain nd_pmu->pmu.event_init = papr_scm_pmu_event_init; 4614c08d4bbSKajol Jain nd_pmu->pmu.read = papr_scm_pmu_read; 4624c08d4bbSKajol Jain nd_pmu->pmu.add = papr_scm_pmu_add; 4634c08d4bbSKajol Jain nd_pmu->pmu.del = papr_scm_pmu_del; 4644c08d4bbSKajol Jain 4654c08d4bbSKajol Jain nd_pmu->pmu.capabilities = PERF_PMU_CAP_NO_INTERRUPT | 4664c08d4bbSKajol Jain PERF_PMU_CAP_NO_EXCLUDE; 4674c08d4bbSKajol Jain 4684c08d4bbSKajol Jain /*updating the cpumask variable */ 4694c08d4bbSKajol Jain nodeid = numa_map_to_online_node(dev_to_node(&p->pdev->dev)); 4704c08d4bbSKajol Jain nd_pmu->arch_cpumask = *cpumask_of_node(nodeid); 4714c08d4bbSKajol Jain 4724c08d4bbSKajol Jain rc = register_nvdimm_pmu(nd_pmu, p->pdev); 4734c08d4bbSKajol Jain if (rc) 4749b1ac046SKajol Jain goto pmu_check_events_err; 4754c08d4bbSKajol Jain 4764c08d4bbSKajol Jain /* 4774c08d4bbSKajol Jain * Set archdata.priv value to nvdimm_pmu structure, to handle the 4784c08d4bbSKajol Jain * unregistering of pmu device. 4794c08d4bbSKajol Jain */ 4804c08d4bbSKajol Jain p->pdev->archdata.priv = nd_pmu; 4814c08d4bbSKajol Jain return; 4824c08d4bbSKajol Jain 4834c08d4bbSKajol Jain pmu_check_events_err: 4844c08d4bbSKajol Jain kfree(nd_pmu); 4854c08d4bbSKajol Jain pmu_err_print: 4864c08d4bbSKajol Jain dev_info(&p->pdev->dev, "nvdimm pmu didn't register rc=%d\n", rc); 4874c08d4bbSKajol Jain } 4884c08d4bbSKajol Jain 489d0007eb1SKajol Jain #else 490d0007eb1SKajol Jain static void papr_scm_pmu_register(struct papr_scm_priv *p) { } 491d0007eb1SKajol Jain #endif 492d0007eb1SKajol Jain 4932d02bf83SVaibhav Jain /* 494b791abf3SVaibhav Jain * Issue hcall to retrieve dimm health info and populate papr_scm_priv with the 495b791abf3SVaibhav Jain * health information. 496b791abf3SVaibhav Jain */ 497b791abf3SVaibhav Jain static int __drc_pmem_query_health(struct papr_scm_priv *p) 498b791abf3SVaibhav Jain { 499b791abf3SVaibhav Jain unsigned long ret[PLPAR_HCALL_BUFSIZE]; 500bbbca723SVaibhav Jain u64 bitmap = 0; 501b791abf3SVaibhav Jain long rc; 502b791abf3SVaibhav Jain 503b791abf3SVaibhav Jain /* issue the hcall */ 504b791abf3SVaibhav Jain rc = plpar_hcall(H_SCM_HEALTH, ret, p->drc_index); 505bbbca723SVaibhav Jain if (rc == H_SUCCESS) 506bbbca723SVaibhav Jain bitmap = ret[0] & ret[1]; 507bbbca723SVaibhav Jain else if (rc == H_FUNCTION) 508bbbca723SVaibhav Jain dev_info_once(&p->pdev->dev, 509bbbca723SVaibhav Jain "Hcall H_SCM_HEALTH not implemented, assuming empty health bitmap"); 510bbbca723SVaibhav Jain else { 511bbbca723SVaibhav Jain 512b791abf3SVaibhav Jain dev_err(&p->pdev->dev, 513b791abf3SVaibhav Jain "Failed to query health information, Err:%ld\n", rc); 514b791abf3SVaibhav Jain return -ENXIO; 515b791abf3SVaibhav Jain } 516b791abf3SVaibhav Jain 517b791abf3SVaibhav Jain p->lasthealth_jiffies = jiffies; 518bbbca723SVaibhav Jain /* Allow injecting specific health bits via inject mask. */ 519bbbca723SVaibhav Jain if (p->health_bitmap_inject_mask) 520bbbca723SVaibhav Jain bitmap = (bitmap & ~p->health_bitmap_inject_mask) | 521bbbca723SVaibhav Jain p->health_bitmap_inject_mask; 522bbbca723SVaibhav Jain WRITE_ONCE(p->health_bitmap, bitmap); 523b791abf3SVaibhav Jain dev_dbg(&p->pdev->dev, 524b791abf3SVaibhav Jain "Queried dimm health info. Bitmap:0x%016lx Mask:0x%016lx\n", 525b791abf3SVaibhav Jain ret[0], ret[1]); 526b791abf3SVaibhav Jain 527b791abf3SVaibhav Jain return 0; 528b791abf3SVaibhav Jain } 529b791abf3SVaibhav Jain 530b791abf3SVaibhav Jain /* Min interval in seconds for assuming stable dimm health */ 531b791abf3SVaibhav Jain #define MIN_HEALTH_QUERY_INTERVAL 60 532b791abf3SVaibhav Jain 533b791abf3SVaibhav Jain /* Query cached health info and if needed call drc_pmem_query_health */ 534b791abf3SVaibhav Jain static int drc_pmem_query_health(struct papr_scm_priv *p) 535b791abf3SVaibhav Jain { 536b791abf3SVaibhav Jain unsigned long cache_timeout; 537b791abf3SVaibhav Jain int rc; 538b791abf3SVaibhav Jain 539b791abf3SVaibhav Jain /* Protect concurrent modifications to papr_scm_priv */ 540b791abf3SVaibhav Jain rc = mutex_lock_interruptible(&p->health_mutex); 541b791abf3SVaibhav Jain if (rc) 542b791abf3SVaibhav Jain return rc; 543b791abf3SVaibhav Jain 544b791abf3SVaibhav Jain /* Jiffies offset for which the health data is assumed to be same */ 545b791abf3SVaibhav Jain cache_timeout = p->lasthealth_jiffies + 546b791abf3SVaibhav Jain msecs_to_jiffies(MIN_HEALTH_QUERY_INTERVAL * 1000); 547b791abf3SVaibhav Jain 548b791abf3SVaibhav Jain /* Fetch new health info is its older than MIN_HEALTH_QUERY_INTERVAL */ 549b791abf3SVaibhav Jain if (time_after(jiffies, cache_timeout)) 550b791abf3SVaibhav Jain rc = __drc_pmem_query_health(p); 551b791abf3SVaibhav Jain else 552b791abf3SVaibhav Jain /* Assume cached health data is valid */ 553b791abf3SVaibhav Jain rc = 0; 554b791abf3SVaibhav Jain 555b791abf3SVaibhav Jain mutex_unlock(&p->health_mutex); 556b791abf3SVaibhav Jain return rc; 557b791abf3SVaibhav Jain } 558faa6d211SAneesh Kumar K.V 559b5beae5eSOliver O'Halloran static int papr_scm_meta_get(struct papr_scm_priv *p, 560b5beae5eSOliver O'Halloran struct nd_cmd_get_config_data_hdr *hdr) 561b5beae5eSOliver O'Halloran { 562b5beae5eSOliver O'Halloran unsigned long data[PLPAR_HCALL_BUFSIZE]; 56353e80bd0SAneesh Kumar K.V unsigned long offset, data_offset; 56453e80bd0SAneesh Kumar K.V int len, read; 565b5beae5eSOliver O'Halloran int64_t ret; 566b5beae5eSOliver O'Halloran 567612ee81bSVaibhav Jain if ((hdr->in_offset + hdr->in_length) > p->metadata_size) 568b5beae5eSOliver O'Halloran return -EINVAL; 569b5beae5eSOliver O'Halloran 57053e80bd0SAneesh Kumar K.V for (len = hdr->in_length; len; len -= read) { 57153e80bd0SAneesh Kumar K.V 57253e80bd0SAneesh Kumar K.V data_offset = hdr->in_length - len; 57353e80bd0SAneesh Kumar K.V offset = hdr->in_offset + data_offset; 57453e80bd0SAneesh Kumar K.V 57553e80bd0SAneesh Kumar K.V if (len >= 8) 57653e80bd0SAneesh Kumar K.V read = 8; 57753e80bd0SAneesh Kumar K.V else if (len >= 4) 57853e80bd0SAneesh Kumar K.V read = 4; 57953e80bd0SAneesh Kumar K.V else if (len >= 2) 58053e80bd0SAneesh Kumar K.V read = 2; 58153e80bd0SAneesh Kumar K.V else 58253e80bd0SAneesh Kumar K.V read = 1; 58353e80bd0SAneesh Kumar K.V 584b5beae5eSOliver O'Halloran ret = plpar_hcall(H_SCM_READ_METADATA, data, p->drc_index, 58553e80bd0SAneesh Kumar K.V offset, read); 586b5beae5eSOliver O'Halloran 587b5beae5eSOliver O'Halloran if (ret == H_PARAMETER) /* bad DRC index */ 588b5beae5eSOliver O'Halloran return -ENODEV; 589b5beae5eSOliver O'Halloran if (ret) 590b5beae5eSOliver O'Halloran return -EINVAL; /* other invalid parameter */ 591b5beae5eSOliver O'Halloran 59253e80bd0SAneesh Kumar K.V switch (read) { 59353e80bd0SAneesh Kumar K.V case 8: 59453e80bd0SAneesh Kumar K.V *(uint64_t *)(hdr->out_buf + data_offset) = be64_to_cpu(data[0]); 59553e80bd0SAneesh Kumar K.V break; 59653e80bd0SAneesh Kumar K.V case 4: 59753e80bd0SAneesh Kumar K.V *(uint32_t *)(hdr->out_buf + data_offset) = be32_to_cpu(data[0] & 0xffffffff); 59853e80bd0SAneesh Kumar K.V break; 599b5beae5eSOliver O'Halloran 60053e80bd0SAneesh Kumar K.V case 2: 60153e80bd0SAneesh Kumar K.V *(uint16_t *)(hdr->out_buf + data_offset) = be16_to_cpu(data[0] & 0xffff); 60253e80bd0SAneesh Kumar K.V break; 60353e80bd0SAneesh Kumar K.V 60453e80bd0SAneesh Kumar K.V case 1: 60553e80bd0SAneesh Kumar K.V *(uint8_t *)(hdr->out_buf + data_offset) = (data[0] & 0xff); 60653e80bd0SAneesh Kumar K.V break; 60753e80bd0SAneesh Kumar K.V } 60853e80bd0SAneesh Kumar K.V } 609b5beae5eSOliver O'Halloran return 0; 610b5beae5eSOliver O'Halloran } 611b5beae5eSOliver O'Halloran 612b5beae5eSOliver O'Halloran static int papr_scm_meta_set(struct papr_scm_priv *p, 613b5beae5eSOliver O'Halloran struct nd_cmd_set_config_hdr *hdr) 614b5beae5eSOliver O'Halloran { 61553e80bd0SAneesh Kumar K.V unsigned long offset, data_offset; 61653e80bd0SAneesh Kumar K.V int len, wrote; 61753e80bd0SAneesh Kumar K.V unsigned long data; 61853e80bd0SAneesh Kumar K.V __be64 data_be; 619b5beae5eSOliver O'Halloran int64_t ret; 620b5beae5eSOliver O'Halloran 621612ee81bSVaibhav Jain if ((hdr->in_offset + hdr->in_length) > p->metadata_size) 622b5beae5eSOliver O'Halloran return -EINVAL; 623b5beae5eSOliver O'Halloran 62453e80bd0SAneesh Kumar K.V for (len = hdr->in_length; len; len -= wrote) { 625b5beae5eSOliver O'Halloran 62653e80bd0SAneesh Kumar K.V data_offset = hdr->in_length - len; 62753e80bd0SAneesh Kumar K.V offset = hdr->in_offset + data_offset; 62853e80bd0SAneesh Kumar K.V 62953e80bd0SAneesh Kumar K.V if (len >= 8) { 63053e80bd0SAneesh Kumar K.V data = *(uint64_t *)(hdr->in_buf + data_offset); 63153e80bd0SAneesh Kumar K.V data_be = cpu_to_be64(data); 63253e80bd0SAneesh Kumar K.V wrote = 8; 63353e80bd0SAneesh Kumar K.V } else if (len >= 4) { 63453e80bd0SAneesh Kumar K.V data = *(uint32_t *)(hdr->in_buf + data_offset); 63553e80bd0SAneesh Kumar K.V data &= 0xffffffff; 63653e80bd0SAneesh Kumar K.V data_be = cpu_to_be32(data); 63753e80bd0SAneesh Kumar K.V wrote = 4; 63853e80bd0SAneesh Kumar K.V } else if (len >= 2) { 63953e80bd0SAneesh Kumar K.V data = *(uint16_t *)(hdr->in_buf + data_offset); 64053e80bd0SAneesh Kumar K.V data &= 0xffff; 64153e80bd0SAneesh Kumar K.V data_be = cpu_to_be16(data); 64253e80bd0SAneesh Kumar K.V wrote = 2; 64353e80bd0SAneesh Kumar K.V } else { 64453e80bd0SAneesh Kumar K.V data_be = *(uint8_t *)(hdr->in_buf + data_offset); 64553e80bd0SAneesh Kumar K.V data_be &= 0xff; 64653e80bd0SAneesh Kumar K.V wrote = 1; 64753e80bd0SAneesh Kumar K.V } 64853e80bd0SAneesh Kumar K.V 64953e80bd0SAneesh Kumar K.V ret = plpar_hcall_norets(H_SCM_WRITE_METADATA, p->drc_index, 65053e80bd0SAneesh Kumar K.V offset, data_be, wrote); 651b5beae5eSOliver O'Halloran if (ret == H_PARAMETER) /* bad DRC index */ 652b5beae5eSOliver O'Halloran return -ENODEV; 653b5beae5eSOliver O'Halloran if (ret) 654b5beae5eSOliver O'Halloran return -EINVAL; /* other invalid parameter */ 65553e80bd0SAneesh Kumar K.V } 656b5beae5eSOliver O'Halloran 657b5beae5eSOliver O'Halloran return 0; 658b5beae5eSOliver O'Halloran } 659b5beae5eSOliver O'Halloran 660f517f792SVaibhav Jain /* 661f517f792SVaibhav Jain * Do a sanity checks on the inputs args to dimm-control function and return 662f517f792SVaibhav Jain * '0' if valid. Validation of PDSM payloads happens later in 663f517f792SVaibhav Jain * papr_scm_service_pdsm. 664f517f792SVaibhav Jain */ 665f517f792SVaibhav Jain static int is_cmd_valid(struct nvdimm *nvdimm, unsigned int cmd, void *buf, 666f517f792SVaibhav Jain unsigned int buf_len) 667f517f792SVaibhav Jain { 668f517f792SVaibhav Jain unsigned long cmd_mask = PAPR_SCM_DIMM_CMD_MASK; 669f517f792SVaibhav Jain struct nd_cmd_pkg *nd_cmd; 670f517f792SVaibhav Jain struct papr_scm_priv *p; 671f517f792SVaibhav Jain enum papr_pdsm pdsm; 672f517f792SVaibhav Jain 673f517f792SVaibhav Jain /* Only dimm-specific calls are supported atm */ 674f517f792SVaibhav Jain if (!nvdimm) 675f517f792SVaibhav Jain return -EINVAL; 676f517f792SVaibhav Jain 677f517f792SVaibhav Jain /* get the provider data from struct nvdimm */ 678f517f792SVaibhav Jain p = nvdimm_provider_data(nvdimm); 679f517f792SVaibhav Jain 680f517f792SVaibhav Jain if (!test_bit(cmd, &cmd_mask)) { 681f517f792SVaibhav Jain dev_dbg(&p->pdev->dev, "Unsupported cmd=%u\n", cmd); 682f517f792SVaibhav Jain return -EINVAL; 683f517f792SVaibhav Jain } 684f517f792SVaibhav Jain 685f517f792SVaibhav Jain /* For CMD_CALL verify pdsm request */ 686f517f792SVaibhav Jain if (cmd == ND_CMD_CALL) { 687f517f792SVaibhav Jain /* Verify the envelope and envelop size */ 688f517f792SVaibhav Jain if (!buf || 689f517f792SVaibhav Jain buf_len < (sizeof(struct nd_cmd_pkg) + ND_PDSM_HDR_SIZE)) { 690f517f792SVaibhav Jain dev_dbg(&p->pdev->dev, "Invalid pkg size=%u\n", 691f517f792SVaibhav Jain buf_len); 692f517f792SVaibhav Jain return -EINVAL; 693f517f792SVaibhav Jain } 694f517f792SVaibhav Jain 695f517f792SVaibhav Jain /* Verify that the nd_cmd_pkg.nd_family is correct */ 696f517f792SVaibhav Jain nd_cmd = (struct nd_cmd_pkg *)buf; 697f517f792SVaibhav Jain 698f517f792SVaibhav Jain if (nd_cmd->nd_family != NVDIMM_FAMILY_PAPR) { 699f517f792SVaibhav Jain dev_dbg(&p->pdev->dev, "Invalid pkg family=0x%llx\n", 700f517f792SVaibhav Jain nd_cmd->nd_family); 701f517f792SVaibhav Jain return -EINVAL; 702f517f792SVaibhav Jain } 703f517f792SVaibhav Jain 704f517f792SVaibhav Jain pdsm = (enum papr_pdsm)nd_cmd->nd_command; 705f517f792SVaibhav Jain 706f517f792SVaibhav Jain /* Verify if the pdsm command is valid */ 707f517f792SVaibhav Jain if (pdsm <= PAPR_PDSM_MIN || pdsm >= PAPR_PDSM_MAX) { 708f517f792SVaibhav Jain dev_dbg(&p->pdev->dev, "PDSM[0x%x]: Invalid PDSM\n", 709f517f792SVaibhav Jain pdsm); 710f517f792SVaibhav Jain return -EINVAL; 711f517f792SVaibhav Jain } 712f517f792SVaibhav Jain 713f517f792SVaibhav Jain /* Have enough space to hold returned 'nd_pkg_pdsm' header */ 714f517f792SVaibhav Jain if (nd_cmd->nd_size_out < ND_PDSM_HDR_SIZE) { 715f517f792SVaibhav Jain dev_dbg(&p->pdev->dev, "PDSM[0x%x]: Invalid payload\n", 716f517f792SVaibhav Jain pdsm); 717f517f792SVaibhav Jain return -EINVAL; 718f517f792SVaibhav Jain } 719f517f792SVaibhav Jain } 720f517f792SVaibhav Jain 721f517f792SVaibhav Jain /* Let the command be further processed */ 722f517f792SVaibhav Jain return 0; 723f517f792SVaibhav Jain } 724f517f792SVaibhav Jain 725af0870c4SVaibhav Jain static int papr_pdsm_fuel_gauge(struct papr_scm_priv *p, 726af0870c4SVaibhav Jain union nd_pdsm_payload *payload) 727af0870c4SVaibhav Jain { 728af0870c4SVaibhav Jain int rc, size; 729af0870c4SVaibhav Jain u64 statval; 730af0870c4SVaibhav Jain struct papr_scm_perf_stat *stat; 731af0870c4SVaibhav Jain struct papr_scm_perf_stats *stats; 732af0870c4SVaibhav Jain 733af0870c4SVaibhav Jain /* Silently fail if fetching performance metrics isn't supported */ 734af0870c4SVaibhav Jain if (!p->stat_buffer_len) 735af0870c4SVaibhav Jain return 0; 736af0870c4SVaibhav Jain 737af0870c4SVaibhav Jain /* Allocate request buffer enough to hold single performance stat */ 738af0870c4SVaibhav Jain size = sizeof(struct papr_scm_perf_stats) + 739af0870c4SVaibhav Jain sizeof(struct papr_scm_perf_stat); 740af0870c4SVaibhav Jain 741af0870c4SVaibhav Jain stats = kzalloc(size, GFP_KERNEL); 742af0870c4SVaibhav Jain if (!stats) 743af0870c4SVaibhav Jain return -ENOMEM; 744af0870c4SVaibhav Jain 745af0870c4SVaibhav Jain stat = &stats->scm_statistic[0]; 746af0870c4SVaibhav Jain memcpy(&stat->stat_id, "MemLife ", sizeof(stat->stat_id)); 747af0870c4SVaibhav Jain stat->stat_val = 0; 748af0870c4SVaibhav Jain 749af0870c4SVaibhav Jain /* Fetch the fuel gauge and populate it in payload */ 750af0870c4SVaibhav Jain rc = drc_pmem_query_stats(p, stats, 1); 751af0870c4SVaibhav Jain if (rc < 0) { 752af0870c4SVaibhav Jain dev_dbg(&p->pdev->dev, "Err(%d) fetching fuel gauge\n", rc); 753af0870c4SVaibhav Jain goto free_stats; 754af0870c4SVaibhav Jain } 755af0870c4SVaibhav Jain 756af0870c4SVaibhav Jain statval = be64_to_cpu(stat->stat_val); 757af0870c4SVaibhav Jain dev_dbg(&p->pdev->dev, 758af0870c4SVaibhav Jain "Fetched fuel-gauge %llu", statval); 759af0870c4SVaibhav Jain payload->health.extension_flags |= 760af0870c4SVaibhav Jain PDSM_DIMM_HEALTH_RUN_GAUGE_VALID; 761af0870c4SVaibhav Jain payload->health.dimm_fuel_gauge = statval; 762af0870c4SVaibhav Jain 763af0870c4SVaibhav Jain rc = sizeof(struct nd_papr_pdsm_health); 764af0870c4SVaibhav Jain 765af0870c4SVaibhav Jain free_stats: 766af0870c4SVaibhav Jain kfree(stats); 767af0870c4SVaibhav Jain return rc; 768af0870c4SVaibhav Jain } 769af0870c4SVaibhav Jain 770de21e137SVaibhav Jain /* Add the dirty-shutdown-counter value to the pdsm */ 771de21e137SVaibhav Jain static int papr_pdsm_dsc(struct papr_scm_priv *p, 772de21e137SVaibhav Jain union nd_pdsm_payload *payload) 773de21e137SVaibhav Jain { 774de21e137SVaibhav Jain payload->health.extension_flags |= PDSM_DIMM_DSC_VALID; 775de21e137SVaibhav Jain payload->health.dimm_dsc = p->dirty_shutdown_counter; 776de21e137SVaibhav Jain 777de21e137SVaibhav Jain return sizeof(struct nd_papr_pdsm_health); 778de21e137SVaibhav Jain } 779de21e137SVaibhav Jain 780d35f18b5SVaibhav Jain /* Fetch the DIMM health info and populate it in provided package. */ 781d35f18b5SVaibhav Jain static int papr_pdsm_health(struct papr_scm_priv *p, 782d35f18b5SVaibhav Jain union nd_pdsm_payload *payload) 783d35f18b5SVaibhav Jain { 784d35f18b5SVaibhav Jain int rc; 785d35f18b5SVaibhav Jain 786d35f18b5SVaibhav Jain /* Ensure dimm health mutex is taken preventing concurrent access */ 787d35f18b5SVaibhav Jain rc = mutex_lock_interruptible(&p->health_mutex); 788d35f18b5SVaibhav Jain if (rc) 789d35f18b5SVaibhav Jain goto out; 790d35f18b5SVaibhav Jain 791d35f18b5SVaibhav Jain /* Always fetch upto date dimm health data ignoring cached values */ 792d35f18b5SVaibhav Jain rc = __drc_pmem_query_health(p); 793d35f18b5SVaibhav Jain if (rc) { 794d35f18b5SVaibhav Jain mutex_unlock(&p->health_mutex); 795d35f18b5SVaibhav Jain goto out; 796d35f18b5SVaibhav Jain } 797d35f18b5SVaibhav Jain 798d35f18b5SVaibhav Jain /* update health struct with various flags derived from health bitmap */ 799d35f18b5SVaibhav Jain payload->health = (struct nd_papr_pdsm_health) { 800d35f18b5SVaibhav Jain .extension_flags = 0, 801d35f18b5SVaibhav Jain .dimm_unarmed = !!(p->health_bitmap & PAPR_PMEM_UNARMED_MASK), 802d35f18b5SVaibhav Jain .dimm_bad_shutdown = !!(p->health_bitmap & PAPR_PMEM_BAD_SHUTDOWN_MASK), 803d35f18b5SVaibhav Jain .dimm_bad_restore = !!(p->health_bitmap & PAPR_PMEM_BAD_RESTORE_MASK), 804d35f18b5SVaibhav Jain .dimm_scrubbed = !!(p->health_bitmap & PAPR_PMEM_SCRUBBED_AND_LOCKED), 805d35f18b5SVaibhav Jain .dimm_locked = !!(p->health_bitmap & PAPR_PMEM_SCRUBBED_AND_LOCKED), 806d35f18b5SVaibhav Jain .dimm_encrypted = !!(p->health_bitmap & PAPR_PMEM_ENCRYPTED), 807d35f18b5SVaibhav Jain .dimm_health = PAPR_PDSM_DIMM_HEALTHY, 808d35f18b5SVaibhav Jain }; 809d35f18b5SVaibhav Jain 810d35f18b5SVaibhav Jain /* Update field dimm_health based on health_bitmap flags */ 811d35f18b5SVaibhav Jain if (p->health_bitmap & PAPR_PMEM_HEALTH_FATAL) 812d35f18b5SVaibhav Jain payload->health.dimm_health = PAPR_PDSM_DIMM_FATAL; 813d35f18b5SVaibhav Jain else if (p->health_bitmap & PAPR_PMEM_HEALTH_CRITICAL) 814d35f18b5SVaibhav Jain payload->health.dimm_health = PAPR_PDSM_DIMM_CRITICAL; 815d35f18b5SVaibhav Jain else if (p->health_bitmap & PAPR_PMEM_HEALTH_UNHEALTHY) 816d35f18b5SVaibhav Jain payload->health.dimm_health = PAPR_PDSM_DIMM_UNHEALTHY; 817d35f18b5SVaibhav Jain 818d35f18b5SVaibhav Jain /* struct populated hence can release the mutex now */ 819d35f18b5SVaibhav Jain mutex_unlock(&p->health_mutex); 820af0870c4SVaibhav Jain 821af0870c4SVaibhav Jain /* Populate the fuel gauge meter in the payload */ 822af0870c4SVaibhav Jain papr_pdsm_fuel_gauge(p, payload); 823de21e137SVaibhav Jain /* Populate the dirty-shutdown-counter field */ 824de21e137SVaibhav Jain papr_pdsm_dsc(p, payload); 825af0870c4SVaibhav Jain 826d35f18b5SVaibhav Jain rc = sizeof(struct nd_papr_pdsm_health); 827d35f18b5SVaibhav Jain 828d35f18b5SVaibhav Jain out: 829d35f18b5SVaibhav Jain return rc; 830d35f18b5SVaibhav Jain } 831d35f18b5SVaibhav Jain 832bbbca723SVaibhav Jain /* Inject a smart error Add the dirty-shutdown-counter value to the pdsm */ 833bbbca723SVaibhav Jain static int papr_pdsm_smart_inject(struct papr_scm_priv *p, 834bbbca723SVaibhav Jain union nd_pdsm_payload *payload) 835bbbca723SVaibhav Jain { 836bbbca723SVaibhav Jain int rc; 837bbbca723SVaibhav Jain u32 supported_flags = 0; 838bbbca723SVaibhav Jain u64 inject_mask = 0, clear_mask = 0; 839bbbca723SVaibhav Jain u64 mask; 840bbbca723SVaibhav Jain 841bbbca723SVaibhav Jain /* Check for individual smart error flags and update inject/clear masks */ 842bbbca723SVaibhav Jain if (payload->smart_inject.flags & PDSM_SMART_INJECT_HEALTH_FATAL) { 843bbbca723SVaibhav Jain supported_flags |= PDSM_SMART_INJECT_HEALTH_FATAL; 844bbbca723SVaibhav Jain if (payload->smart_inject.fatal_enable) 845bbbca723SVaibhav Jain inject_mask |= PAPR_PMEM_HEALTH_FATAL; 846bbbca723SVaibhav Jain else 847bbbca723SVaibhav Jain clear_mask |= PAPR_PMEM_HEALTH_FATAL; 848bbbca723SVaibhav Jain } 849bbbca723SVaibhav Jain 850bbbca723SVaibhav Jain if (payload->smart_inject.flags & PDSM_SMART_INJECT_BAD_SHUTDOWN) { 851bbbca723SVaibhav Jain supported_flags |= PDSM_SMART_INJECT_BAD_SHUTDOWN; 852bbbca723SVaibhav Jain if (payload->smart_inject.unsafe_shutdown_enable) 853bbbca723SVaibhav Jain inject_mask |= PAPR_PMEM_SHUTDOWN_DIRTY; 854bbbca723SVaibhav Jain else 855bbbca723SVaibhav Jain clear_mask |= PAPR_PMEM_SHUTDOWN_DIRTY; 856bbbca723SVaibhav Jain } 857bbbca723SVaibhav Jain 858bbbca723SVaibhav Jain dev_dbg(&p->pdev->dev, "[Smart-inject] inject_mask=%#llx clear_mask=%#llx\n", 859bbbca723SVaibhav Jain inject_mask, clear_mask); 860bbbca723SVaibhav Jain 861bbbca723SVaibhav Jain /* Prevent concurrent access to dimm health bitmap related members */ 862bbbca723SVaibhav Jain rc = mutex_lock_interruptible(&p->health_mutex); 863bbbca723SVaibhav Jain if (rc) 864bbbca723SVaibhav Jain return rc; 865bbbca723SVaibhav Jain 866bbbca723SVaibhav Jain /* Use inject/clear masks to set health_bitmap_inject_mask */ 867bbbca723SVaibhav Jain mask = READ_ONCE(p->health_bitmap_inject_mask); 868bbbca723SVaibhav Jain mask = (mask & ~clear_mask) | inject_mask; 869bbbca723SVaibhav Jain WRITE_ONCE(p->health_bitmap_inject_mask, mask); 870bbbca723SVaibhav Jain 871bbbca723SVaibhav Jain /* Invalidate cached health bitmap */ 872bbbca723SVaibhav Jain p->lasthealth_jiffies = 0; 873bbbca723SVaibhav Jain 874bbbca723SVaibhav Jain mutex_unlock(&p->health_mutex); 875bbbca723SVaibhav Jain 876bbbca723SVaibhav Jain /* Return the supported flags back to userspace */ 877bbbca723SVaibhav Jain payload->smart_inject.flags = supported_flags; 878bbbca723SVaibhav Jain 879bbbca723SVaibhav Jain return sizeof(struct nd_papr_pdsm_health); 880bbbca723SVaibhav Jain } 881bbbca723SVaibhav Jain 882f517f792SVaibhav Jain /* 883f517f792SVaibhav Jain * 'struct pdsm_cmd_desc' 884f517f792SVaibhav Jain * Identifies supported PDSMs' expected length of in/out payloads 885f517f792SVaibhav Jain * and pdsm service function. 886f517f792SVaibhav Jain * 887f517f792SVaibhav Jain * size_in : Size of input payload if any in the PDSM request. 888f517f792SVaibhav Jain * size_out : Size of output payload if any in the PDSM request. 889f517f792SVaibhav Jain * service : Service function for the PDSM request. Return semantics: 890f517f792SVaibhav Jain * rc < 0 : Error servicing PDSM and rc indicates the error. 891f517f792SVaibhav Jain * rc >=0 : Serviced successfully and 'rc' indicate number of 892f517f792SVaibhav Jain * bytes written to payload. 893f517f792SVaibhav Jain */ 894f517f792SVaibhav Jain struct pdsm_cmd_desc { 895f517f792SVaibhav Jain u32 size_in; 896f517f792SVaibhav Jain u32 size_out; 897f517f792SVaibhav Jain int (*service)(struct papr_scm_priv *dimm, 898f517f792SVaibhav Jain union nd_pdsm_payload *payload); 899f517f792SVaibhav Jain }; 900f517f792SVaibhav Jain 901f517f792SVaibhav Jain /* Holds all supported PDSMs' command descriptors */ 902f517f792SVaibhav Jain static const struct pdsm_cmd_desc __pdsm_cmd_descriptors[] = { 903f517f792SVaibhav Jain [PAPR_PDSM_MIN] = { 904f517f792SVaibhav Jain .size_in = 0, 905f517f792SVaibhav Jain .size_out = 0, 906f517f792SVaibhav Jain .service = NULL, 907f517f792SVaibhav Jain }, 908f517f792SVaibhav Jain /* New PDSM command descriptors to be added below */ 909f517f792SVaibhav Jain 910d35f18b5SVaibhav Jain [PAPR_PDSM_HEALTH] = { 911d35f18b5SVaibhav Jain .size_in = 0, 912d35f18b5SVaibhav Jain .size_out = sizeof(struct nd_papr_pdsm_health), 913d35f18b5SVaibhav Jain .service = papr_pdsm_health, 914d35f18b5SVaibhav Jain }, 915bbbca723SVaibhav Jain 916bbbca723SVaibhav Jain [PAPR_PDSM_SMART_INJECT] = { 917bbbca723SVaibhav Jain .size_in = sizeof(struct nd_papr_pdsm_smart_inject), 918bbbca723SVaibhav Jain .size_out = sizeof(struct nd_papr_pdsm_smart_inject), 919bbbca723SVaibhav Jain .service = papr_pdsm_smart_inject, 920bbbca723SVaibhav Jain }, 921f517f792SVaibhav Jain /* Empty */ 922f517f792SVaibhav Jain [PAPR_PDSM_MAX] = { 923f517f792SVaibhav Jain .size_in = 0, 924f517f792SVaibhav Jain .size_out = 0, 925f517f792SVaibhav Jain .service = NULL, 926f517f792SVaibhav Jain }, 927f517f792SVaibhav Jain }; 928f517f792SVaibhav Jain 929f517f792SVaibhav Jain /* Given a valid pdsm cmd return its command descriptor else return NULL */ 930f517f792SVaibhav Jain static inline const struct pdsm_cmd_desc *pdsm_cmd_desc(enum papr_pdsm cmd) 931f517f792SVaibhav Jain { 932f517f792SVaibhav Jain if (cmd >= 0 || cmd < ARRAY_SIZE(__pdsm_cmd_descriptors)) 933f517f792SVaibhav Jain return &__pdsm_cmd_descriptors[cmd]; 934f517f792SVaibhav Jain 935f517f792SVaibhav Jain return NULL; 936f517f792SVaibhav Jain } 937f517f792SVaibhav Jain 938f517f792SVaibhav Jain /* 939f517f792SVaibhav Jain * For a given pdsm request call an appropriate service function. 940f517f792SVaibhav Jain * Returns errors if any while handling the pdsm command package. 941f517f792SVaibhav Jain */ 942f517f792SVaibhav Jain static int papr_scm_service_pdsm(struct papr_scm_priv *p, 943f517f792SVaibhav Jain struct nd_cmd_pkg *pkg) 944f517f792SVaibhav Jain { 945f517f792SVaibhav Jain /* Get the PDSM header and PDSM command */ 946f517f792SVaibhav Jain struct nd_pkg_pdsm *pdsm_pkg = (struct nd_pkg_pdsm *)pkg->nd_payload; 947f517f792SVaibhav Jain enum papr_pdsm pdsm = (enum papr_pdsm)pkg->nd_command; 948f517f792SVaibhav Jain const struct pdsm_cmd_desc *pdsc; 949f517f792SVaibhav Jain int rc; 950f517f792SVaibhav Jain 951f517f792SVaibhav Jain /* Fetch corresponding pdsm descriptor for validation and servicing */ 952f517f792SVaibhav Jain pdsc = pdsm_cmd_desc(pdsm); 953f517f792SVaibhav Jain 954f517f792SVaibhav Jain /* Validate pdsm descriptor */ 955f517f792SVaibhav Jain /* Ensure that reserved fields are 0 */ 956f517f792SVaibhav Jain if (pdsm_pkg->reserved[0] || pdsm_pkg->reserved[1]) { 957f517f792SVaibhav Jain dev_dbg(&p->pdev->dev, "PDSM[0x%x]: Invalid reserved field\n", 958f517f792SVaibhav Jain pdsm); 959f517f792SVaibhav Jain return -EINVAL; 960f517f792SVaibhav Jain } 961f517f792SVaibhav Jain 962f517f792SVaibhav Jain /* If pdsm expects some input, then ensure that the size_in matches */ 963f517f792SVaibhav Jain if (pdsc->size_in && 964f517f792SVaibhav Jain pkg->nd_size_in != (pdsc->size_in + ND_PDSM_HDR_SIZE)) { 965f517f792SVaibhav Jain dev_dbg(&p->pdev->dev, "PDSM[0x%x]: Mismatched size_in=%d\n", 966f517f792SVaibhav Jain pdsm, pkg->nd_size_in); 967f517f792SVaibhav Jain return -EINVAL; 968f517f792SVaibhav Jain } 969f517f792SVaibhav Jain 970f517f792SVaibhav Jain /* If pdsm wants to return data, then ensure that size_out matches */ 971f517f792SVaibhav Jain if (pdsc->size_out && 972f517f792SVaibhav Jain pkg->nd_size_out != (pdsc->size_out + ND_PDSM_HDR_SIZE)) { 973f517f792SVaibhav Jain dev_dbg(&p->pdev->dev, "PDSM[0x%x]: Mismatched size_out=%d\n", 974f517f792SVaibhav Jain pdsm, pkg->nd_size_out); 975f517f792SVaibhav Jain return -EINVAL; 976f517f792SVaibhav Jain } 977f517f792SVaibhav Jain 978f517f792SVaibhav Jain /* Service the pdsm */ 979f517f792SVaibhav Jain if (pdsc->service) { 980f517f792SVaibhav Jain dev_dbg(&p->pdev->dev, "PDSM[0x%x]: Servicing..\n", pdsm); 981f517f792SVaibhav Jain 982f517f792SVaibhav Jain rc = pdsc->service(p, &pdsm_pkg->payload); 983f517f792SVaibhav Jain 984f517f792SVaibhav Jain if (rc < 0) { 985f517f792SVaibhav Jain /* error encountered while servicing pdsm */ 986f517f792SVaibhav Jain pdsm_pkg->cmd_status = rc; 987f517f792SVaibhav Jain pkg->nd_fw_size = ND_PDSM_HDR_SIZE; 988f517f792SVaibhav Jain } else { 989f517f792SVaibhav Jain /* pdsm serviced and 'rc' bytes written to payload */ 990f517f792SVaibhav Jain pdsm_pkg->cmd_status = 0; 991f517f792SVaibhav Jain pkg->nd_fw_size = ND_PDSM_HDR_SIZE + rc; 992f517f792SVaibhav Jain } 993f517f792SVaibhav Jain } else { 994f517f792SVaibhav Jain dev_dbg(&p->pdev->dev, "PDSM[0x%x]: Unsupported PDSM request\n", 995f517f792SVaibhav Jain pdsm); 996f517f792SVaibhav Jain pdsm_pkg->cmd_status = -ENOENT; 997f517f792SVaibhav Jain pkg->nd_fw_size = ND_PDSM_HDR_SIZE; 998f517f792SVaibhav Jain } 999f517f792SVaibhav Jain 1000f517f792SVaibhav Jain return pdsm_pkg->cmd_status; 1001f517f792SVaibhav Jain } 1002f517f792SVaibhav Jain 100372c4ebbaSVaibhav Jain static int papr_scm_ndctl(struct nvdimm_bus_descriptor *nd_desc, 100472c4ebbaSVaibhav Jain struct nvdimm *nvdimm, unsigned int cmd, void *buf, 100572c4ebbaSVaibhav Jain unsigned int buf_len, int *cmd_rc) 1006b5beae5eSOliver O'Halloran { 1007b5beae5eSOliver O'Halloran struct nd_cmd_get_config_size *get_size_hdr; 1008f517f792SVaibhav Jain struct nd_cmd_pkg *call_pkg = NULL; 1009b5beae5eSOliver O'Halloran struct papr_scm_priv *p; 1010b5f38f09SVaibhav Jain int rc; 1011b5beae5eSOliver O'Halloran 1012f517f792SVaibhav Jain rc = is_cmd_valid(nvdimm, cmd, buf, buf_len); 1013f517f792SVaibhav Jain if (rc) { 1014f517f792SVaibhav Jain pr_debug("Invalid cmd=0x%x. Err=%d\n", cmd, rc); 1015f517f792SVaibhav Jain return rc; 1016f517f792SVaibhav Jain } 1017b5beae5eSOliver O'Halloran 1018b5f38f09SVaibhav Jain /* Use a local variable in case cmd_rc pointer is NULL */ 1019b5f38f09SVaibhav Jain if (!cmd_rc) 1020b5f38f09SVaibhav Jain cmd_rc = &rc; 1021b5f38f09SVaibhav Jain 1022b5beae5eSOliver O'Halloran p = nvdimm_provider_data(nvdimm); 1023b5beae5eSOliver O'Halloran 1024b5beae5eSOliver O'Halloran switch (cmd) { 1025b5beae5eSOliver O'Halloran case ND_CMD_GET_CONFIG_SIZE: 1026b5beae5eSOliver O'Halloran get_size_hdr = buf; 1027b5beae5eSOliver O'Halloran 1028b5beae5eSOliver O'Halloran get_size_hdr->status = 0; 102953e80bd0SAneesh Kumar K.V get_size_hdr->max_xfer = 8; 1030b5beae5eSOliver O'Halloran get_size_hdr->config_size = p->metadata_size; 1031b5beae5eSOliver O'Halloran *cmd_rc = 0; 1032b5beae5eSOliver O'Halloran break; 1033b5beae5eSOliver O'Halloran 1034b5beae5eSOliver O'Halloran case ND_CMD_GET_CONFIG_DATA: 1035b5beae5eSOliver O'Halloran *cmd_rc = papr_scm_meta_get(p, buf); 1036b5beae5eSOliver O'Halloran break; 1037b5beae5eSOliver O'Halloran 1038b5beae5eSOliver O'Halloran case ND_CMD_SET_CONFIG_DATA: 1039b5beae5eSOliver O'Halloran *cmd_rc = papr_scm_meta_set(p, buf); 1040b5beae5eSOliver O'Halloran break; 1041b5beae5eSOliver O'Halloran 1042f517f792SVaibhav Jain case ND_CMD_CALL: 1043f517f792SVaibhav Jain call_pkg = (struct nd_cmd_pkg *)buf; 1044f517f792SVaibhav Jain *cmd_rc = papr_scm_service_pdsm(p, call_pkg); 1045f517f792SVaibhav Jain break; 1046f517f792SVaibhav Jain 1047b5beae5eSOliver O'Halloran default: 1048b5f38f09SVaibhav Jain dev_dbg(&p->pdev->dev, "Unknown command = %d\n", cmd); 1049b5beae5eSOliver O'Halloran return -EINVAL; 1050b5beae5eSOliver O'Halloran } 1051b5beae5eSOliver O'Halloran 1052b5beae5eSOliver O'Halloran dev_dbg(&p->pdev->dev, "returned with cmd_rc = %d\n", *cmd_rc); 1053b5beae5eSOliver O'Halloran 1054b5beae5eSOliver O'Halloran return 0; 1055b5beae5eSOliver O'Halloran } 1056b5beae5eSOliver O'Halloran 1057bbbca723SVaibhav Jain static ssize_t health_bitmap_inject_show(struct device *dev, 1058bbbca723SVaibhav Jain struct device_attribute *attr, 1059bbbca723SVaibhav Jain char *buf) 1060bbbca723SVaibhav Jain { 1061bbbca723SVaibhav Jain struct nvdimm *dimm = to_nvdimm(dev); 1062bbbca723SVaibhav Jain struct papr_scm_priv *p = nvdimm_provider_data(dimm); 1063bbbca723SVaibhav Jain 1064bbbca723SVaibhav Jain return sprintf(buf, "%#llx\n", 1065bbbca723SVaibhav Jain READ_ONCE(p->health_bitmap_inject_mask)); 1066bbbca723SVaibhav Jain } 1067bbbca723SVaibhav Jain 1068bbbca723SVaibhav Jain static DEVICE_ATTR_ADMIN_RO(health_bitmap_inject); 1069bbbca723SVaibhav Jain 10702d02bf83SVaibhav Jain static ssize_t perf_stats_show(struct device *dev, 10712d02bf83SVaibhav Jain struct device_attribute *attr, char *buf) 10722d02bf83SVaibhav Jain { 1073ca78ef2fSVaibhav Jain int index; 1074ca78ef2fSVaibhav Jain ssize_t rc; 10752d02bf83SVaibhav Jain struct seq_buf s; 10762d02bf83SVaibhav Jain struct papr_scm_perf_stat *stat; 10772d02bf83SVaibhav Jain struct papr_scm_perf_stats *stats; 10782d02bf83SVaibhav Jain struct nvdimm *dimm = to_nvdimm(dev); 10792d02bf83SVaibhav Jain struct papr_scm_priv *p = nvdimm_provider_data(dimm); 10802d02bf83SVaibhav Jain 10812d02bf83SVaibhav Jain if (!p->stat_buffer_len) 10822d02bf83SVaibhav Jain return -ENOENT; 10832d02bf83SVaibhav Jain 10842d02bf83SVaibhav Jain /* Allocate the buffer for phyp where stats are written */ 10852d02bf83SVaibhav Jain stats = kzalloc(p->stat_buffer_len, GFP_KERNEL); 10862d02bf83SVaibhav Jain if (!stats) 10872d02bf83SVaibhav Jain return -ENOMEM; 10882d02bf83SVaibhav Jain 10892d02bf83SVaibhav Jain /* Ask phyp to return all dimm perf stats */ 10902d02bf83SVaibhav Jain rc = drc_pmem_query_stats(p, stats, 0); 10912d02bf83SVaibhav Jain if (rc) 10922d02bf83SVaibhav Jain goto free_stats; 10932d02bf83SVaibhav Jain /* 10942d02bf83SVaibhav Jain * Go through the returned output buffer and print stats and 10952d02bf83SVaibhav Jain * values. Since stat_id is essentially a char string of 10962d02bf83SVaibhav Jain * 8 bytes, simply use the string format specifier to print it. 10972d02bf83SVaibhav Jain */ 10982d02bf83SVaibhav Jain seq_buf_init(&s, buf, PAGE_SIZE); 10992d02bf83SVaibhav Jain for (index = 0, stat = stats->scm_statistic; 11002d02bf83SVaibhav Jain index < be32_to_cpu(stats->num_statistics); 11012d02bf83SVaibhav Jain ++index, ++stat) { 11022d02bf83SVaibhav Jain seq_buf_printf(&s, "%.8s = 0x%016llX\n", 11032d02bf83SVaibhav Jain stat->stat_id, 11042d02bf83SVaibhav Jain be64_to_cpu(stat->stat_val)); 11052d02bf83SVaibhav Jain } 11062d02bf83SVaibhav Jain 11072d02bf83SVaibhav Jain free_stats: 11082d02bf83SVaibhav Jain kfree(stats); 1109ca78ef2fSVaibhav Jain return rc ? rc : (ssize_t)seq_buf_used(&s); 11102d02bf83SVaibhav Jain } 111143663374SWang Wensheng static DEVICE_ATTR_ADMIN_RO(perf_stats); 11122d02bf83SVaibhav Jain 1113b791abf3SVaibhav Jain static ssize_t flags_show(struct device *dev, 1114b791abf3SVaibhav Jain struct device_attribute *attr, char *buf) 1115b791abf3SVaibhav Jain { 1116b791abf3SVaibhav Jain struct nvdimm *dimm = to_nvdimm(dev); 1117b791abf3SVaibhav Jain struct papr_scm_priv *p = nvdimm_provider_data(dimm); 1118b791abf3SVaibhav Jain struct seq_buf s; 1119b791abf3SVaibhav Jain u64 health; 1120b791abf3SVaibhav Jain int rc; 1121b791abf3SVaibhav Jain 1122b791abf3SVaibhav Jain rc = drc_pmem_query_health(p); 1123b791abf3SVaibhav Jain if (rc) 1124b791abf3SVaibhav Jain return rc; 1125b791abf3SVaibhav Jain 1126b791abf3SVaibhav Jain /* Copy health_bitmap locally, check masks & update out buffer */ 1127b791abf3SVaibhav Jain health = READ_ONCE(p->health_bitmap); 1128b791abf3SVaibhav Jain 1129b791abf3SVaibhav Jain seq_buf_init(&s, buf, PAGE_SIZE); 1130b791abf3SVaibhav Jain if (health & PAPR_PMEM_UNARMED_MASK) 1131b791abf3SVaibhav Jain seq_buf_printf(&s, "not_armed "); 1132b791abf3SVaibhav Jain 1133b791abf3SVaibhav Jain if (health & PAPR_PMEM_BAD_SHUTDOWN_MASK) 1134b791abf3SVaibhav Jain seq_buf_printf(&s, "flush_fail "); 1135b791abf3SVaibhav Jain 1136b791abf3SVaibhav Jain if (health & PAPR_PMEM_BAD_RESTORE_MASK) 1137b791abf3SVaibhav Jain seq_buf_printf(&s, "restore_fail "); 1138b791abf3SVaibhav Jain 1139b791abf3SVaibhav Jain if (health & PAPR_PMEM_ENCRYPTED) 1140b791abf3SVaibhav Jain seq_buf_printf(&s, "encrypted "); 1141b791abf3SVaibhav Jain 1142b791abf3SVaibhav Jain if (health & PAPR_PMEM_SMART_EVENT_MASK) 1143b791abf3SVaibhav Jain seq_buf_printf(&s, "smart_notify "); 1144b791abf3SVaibhav Jain 1145b791abf3SVaibhav Jain if (health & PAPR_PMEM_SCRUBBED_AND_LOCKED) 1146b791abf3SVaibhav Jain seq_buf_printf(&s, "scrubbed locked "); 1147b791abf3SVaibhav Jain 1148b791abf3SVaibhav Jain if (seq_buf_used(&s)) 1149b791abf3SVaibhav Jain seq_buf_printf(&s, "\n"); 1150b791abf3SVaibhav Jain 1151b791abf3SVaibhav Jain return seq_buf_used(&s); 1152b791abf3SVaibhav Jain } 1153b791abf3SVaibhav Jain DEVICE_ATTR_RO(flags); 1154b791abf3SVaibhav Jain 1155de21e137SVaibhav Jain static ssize_t dirty_shutdown_show(struct device *dev, 1156de21e137SVaibhav Jain struct device_attribute *attr, char *buf) 1157de21e137SVaibhav Jain { 1158de21e137SVaibhav Jain struct nvdimm *dimm = to_nvdimm(dev); 1159de21e137SVaibhav Jain struct papr_scm_priv *p = nvdimm_provider_data(dimm); 1160de21e137SVaibhav Jain 1161de21e137SVaibhav Jain return sysfs_emit(buf, "%llu\n", p->dirty_shutdown_counter); 1162de21e137SVaibhav Jain } 1163de21e137SVaibhav Jain DEVICE_ATTR_RO(dirty_shutdown); 1164de21e137SVaibhav Jain 1165ed78f56eSVaibhav Jain static umode_t papr_nd_attribute_visible(struct kobject *kobj, 1166ed78f56eSVaibhav Jain struct attribute *attr, int n) 1167ed78f56eSVaibhav Jain { 1168ed78f56eSVaibhav Jain struct device *dev = kobj_to_dev(kobj); 1169ed78f56eSVaibhav Jain struct nvdimm *nvdimm = to_nvdimm(dev); 1170ed78f56eSVaibhav Jain struct papr_scm_priv *p = nvdimm_provider_data(nvdimm); 1171ed78f56eSVaibhav Jain 1172ed78f56eSVaibhav Jain /* For if perf-stats not available remove perf_stats sysfs */ 1173ed78f56eSVaibhav Jain if (attr == &dev_attr_perf_stats.attr && p->stat_buffer_len == 0) 1174ed78f56eSVaibhav Jain return 0; 1175ed78f56eSVaibhav Jain 1176ed78f56eSVaibhav Jain return attr->mode; 1177ed78f56eSVaibhav Jain } 1178ed78f56eSVaibhav Jain 1179b791abf3SVaibhav Jain /* papr_scm specific dimm attributes */ 1180b791abf3SVaibhav Jain static struct attribute *papr_nd_attributes[] = { 1181b791abf3SVaibhav Jain &dev_attr_flags.attr, 11822d02bf83SVaibhav Jain &dev_attr_perf_stats.attr, 1183de21e137SVaibhav Jain &dev_attr_dirty_shutdown.attr, 1184bbbca723SVaibhav Jain &dev_attr_health_bitmap_inject.attr, 1185b791abf3SVaibhav Jain NULL, 1186b791abf3SVaibhav Jain }; 1187b791abf3SVaibhav Jain 11886b3a3e12SRohan McLure static const struct attribute_group papr_nd_attribute_group = { 1189b791abf3SVaibhav Jain .name = "papr", 1190ed78f56eSVaibhav Jain .is_visible = papr_nd_attribute_visible, 1191b791abf3SVaibhav Jain .attrs = papr_nd_attributes, 1192b791abf3SVaibhav Jain }; 1193b791abf3SVaibhav Jain 1194b791abf3SVaibhav Jain static const struct attribute_group *papr_nd_attr_groups[] = { 1195b791abf3SVaibhav Jain &papr_nd_attribute_group, 1196b791abf3SVaibhav Jain NULL, 1197b791abf3SVaibhav Jain }; 1198b791abf3SVaibhav Jain 1199b5beae5eSOliver O'Halloran static int papr_scm_nvdimm_init(struct papr_scm_priv *p) 1200b5beae5eSOliver O'Halloran { 1201b5beae5eSOliver O'Halloran struct device *dev = &p->pdev->dev; 1202b5beae5eSOliver O'Halloran struct nd_mapping_desc mapping; 1203b5beae5eSOliver O'Halloran struct nd_region_desc ndr_desc; 1204b5beae5eSOliver O'Halloran unsigned long dimm_flags; 1205da1115fdSAneesh Kumar K.V int target_nid, online_nid; 1206b5beae5eSOliver O'Halloran 1207b5beae5eSOliver O'Halloran p->bus_desc.ndctl = papr_scm_ndctl; 1208b5beae5eSOliver O'Halloran p->bus_desc.module = THIS_MODULE; 1209b5beae5eSOliver O'Halloran p->bus_desc.of_node = p->pdev->dev.of_node; 1210b5beae5eSOliver O'Halloran p->bus_desc.provider_name = kstrdup(p->pdev->name, GFP_KERNEL); 1211b5beae5eSOliver O'Halloran 121213135b46SVaibhav Jain /* Set the dimm command family mask to accept PDSMs */ 121313135b46SVaibhav Jain set_bit(NVDIMM_FAMILY_PAPR, &p->bus_desc.dimm_family_mask); 121413135b46SVaibhav Jain 1215b5beae5eSOliver O'Halloran if (!p->bus_desc.provider_name) 1216b5beae5eSOliver O'Halloran return -ENOMEM; 1217b5beae5eSOliver O'Halloran 1218b5beae5eSOliver O'Halloran p->bus = nvdimm_bus_register(NULL, &p->bus_desc); 1219b5beae5eSOliver O'Halloran if (!p->bus) { 1220b5beae5eSOliver O'Halloran dev_err(dev, "Error creating nvdimm bus %pOF\n", p->dn); 12215649607aSVaibhav Jain kfree(p->bus_desc.provider_name); 1222b5beae5eSOliver O'Halloran return -ENXIO; 1223b5beae5eSOliver O'Halloran } 1224b5beae5eSOliver O'Halloran 1225b5beae5eSOliver O'Halloran dimm_flags = 0; 1226a0e37452SDan Williams set_bit(NDD_LABELING, &dimm_flags); 1227b5beae5eSOliver O'Halloran 1228adb68c38SVaibhav Jain /* 1229adb68c38SVaibhav Jain * Check if the nvdimm is unarmed. No locking needed as we are still 1230adb68c38SVaibhav Jain * initializing. Ignore error encountered if any. 1231adb68c38SVaibhav Jain */ 1232adb68c38SVaibhav Jain __drc_pmem_query_health(p); 1233adb68c38SVaibhav Jain 1234adb68c38SVaibhav Jain if (p->health_bitmap & PAPR_PMEM_UNARMED_MASK) 1235adb68c38SVaibhav Jain set_bit(NDD_UNARMED, &dimm_flags); 1236adb68c38SVaibhav Jain 1237b791abf3SVaibhav Jain p->nvdimm = nvdimm_create(p->bus, p, papr_nd_attr_groups, 1238b791abf3SVaibhav Jain dimm_flags, PAPR_SCM_DIMM_CMD_MASK, 0, NULL); 1239b5beae5eSOliver O'Halloran if (!p->nvdimm) { 1240b5beae5eSOliver O'Halloran dev_err(dev, "Error creating DIMM object for %pOF\n", p->dn); 1241b5beae5eSOliver O'Halloran goto err; 1242b5beae5eSOliver O'Halloran } 1243b5beae5eSOliver O'Halloran 1244b0d65a8cSOliver O'Halloran if (nvdimm_bus_check_dimm_count(p->bus, 1)) 1245b0d65a8cSOliver O'Halloran goto err; 1246b0d65a8cSOliver O'Halloran 1247b5beae5eSOliver O'Halloran /* now add the region */ 1248b5beae5eSOliver O'Halloran 1249b5beae5eSOliver O'Halloran memset(&mapping, 0, sizeof(mapping)); 1250b5beae5eSOliver O'Halloran mapping.nvdimm = p->nvdimm; 1251b5beae5eSOliver O'Halloran mapping.start = 0; 1252b5beae5eSOliver O'Halloran mapping.size = p->blocks * p->block_size; // XXX: potential overflow? 1253b5beae5eSOliver O'Halloran 1254b5beae5eSOliver O'Halloran memset(&ndr_desc, 0, sizeof(ndr_desc)); 1255da1115fdSAneesh Kumar K.V target_nid = dev_to_node(&p->pdev->dev); 1256575e23b6SDan Williams online_nid = numa_map_to_online_node(target_nid); 1257da1115fdSAneesh Kumar K.V ndr_desc.numa_node = online_nid; 1258da1115fdSAneesh Kumar K.V ndr_desc.target_node = target_nid; 1259b5beae5eSOliver O'Halloran ndr_desc.res = &p->res; 1260b5beae5eSOliver O'Halloran ndr_desc.of_node = p->dn; 1261b5beae5eSOliver O'Halloran ndr_desc.provider_data = p; 1262b5beae5eSOliver O'Halloran ndr_desc.mapping = &mapping; 1263b5beae5eSOliver O'Halloran ndr_desc.num_mappings = 1; 1264b5beae5eSOliver O'Halloran ndr_desc.nd_set = &p->nd_set; 1265b5beae5eSOliver O'Halloran 126675b7c05eSShivaprasad G Bhat if (p->hcall_flush_required) { 126775b7c05eSShivaprasad G Bhat set_bit(ND_REGION_ASYNC, &ndr_desc.flags); 126875b7c05eSShivaprasad G Bhat ndr_desc.flush = papr_scm_pmem_flush; 126975b7c05eSShivaprasad G Bhat } 127075b7c05eSShivaprasad G Bhat 12712a0ffbd4SAneesh Kumar K.V if (p->is_volatile) 12722a0ffbd4SAneesh Kumar K.V p->region = nvdimm_volatile_region_create(p->bus, &ndr_desc); 1273338f6dacSAneesh Kumar K.V else { 1274338f6dacSAneesh Kumar K.V set_bit(ND_REGION_PERSIST_MEMCTRL, &ndr_desc.flags); 1275b5beae5eSOliver O'Halloran p->region = nvdimm_pmem_region_create(p->bus, &ndr_desc); 1276338f6dacSAneesh Kumar K.V } 1277b5beae5eSOliver O'Halloran if (!p->region) { 1278b5beae5eSOliver O'Halloran dev_err(dev, "Error registering region %pR from %pOF\n", 1279b5beae5eSOliver O'Halloran ndr_desc.res, p->dn); 1280b5beae5eSOliver O'Halloran goto err; 1281b5beae5eSOliver O'Halloran } 1282da1115fdSAneesh Kumar K.V if (target_nid != online_nid) 1283da1115fdSAneesh Kumar K.V dev_info(dev, "Region registered with target node %d and online node %d", 1284da1115fdSAneesh Kumar K.V target_nid, online_nid); 1285b5beae5eSOliver O'Halloran 128685343a8dSSantosh Sivaraj mutex_lock(&papr_ndr_lock); 128785343a8dSSantosh Sivaraj list_add_tail(&p->region_list, &papr_nd_regions); 128885343a8dSSantosh Sivaraj mutex_unlock(&papr_ndr_lock); 128985343a8dSSantosh Sivaraj 1290b5beae5eSOliver O'Halloran return 0; 1291b5beae5eSOliver O'Halloran 1292b5beae5eSOliver O'Halloran err: nvdimm_bus_unregister(p->bus); 1293b5beae5eSOliver O'Halloran kfree(p->bus_desc.provider_name); 1294b5beae5eSOliver O'Halloran return -ENXIO; 1295b5beae5eSOliver O'Halloran } 1296b5beae5eSOliver O'Halloran 129785343a8dSSantosh Sivaraj static void papr_scm_add_badblock(struct nd_region *region, 129885343a8dSSantosh Sivaraj struct nvdimm_bus *bus, u64 phys_addr) 129985343a8dSSantosh Sivaraj { 130085343a8dSSantosh Sivaraj u64 aligned_addr = ALIGN_DOWN(phys_addr, L1_CACHE_BYTES); 130185343a8dSSantosh Sivaraj 130285343a8dSSantosh Sivaraj if (nvdimm_bus_add_badrange(bus, aligned_addr, L1_CACHE_BYTES)) { 130385343a8dSSantosh Sivaraj pr_err("Bad block registration for 0x%llx failed\n", phys_addr); 130485343a8dSSantosh Sivaraj return; 130585343a8dSSantosh Sivaraj } 130685343a8dSSantosh Sivaraj 130785343a8dSSantosh Sivaraj pr_debug("Add memory range (0x%llx - 0x%llx) as bad range\n", 130885343a8dSSantosh Sivaraj aligned_addr, aligned_addr + L1_CACHE_BYTES); 130985343a8dSSantosh Sivaraj 131085343a8dSSantosh Sivaraj nvdimm_region_notify(region, NVDIMM_REVALIDATE_POISON); 131185343a8dSSantosh Sivaraj } 131285343a8dSSantosh Sivaraj 131385343a8dSSantosh Sivaraj static int handle_mce_ue(struct notifier_block *nb, unsigned long val, 131485343a8dSSantosh Sivaraj void *data) 131585343a8dSSantosh Sivaraj { 131685343a8dSSantosh Sivaraj struct machine_check_event *evt = data; 131785343a8dSSantosh Sivaraj struct papr_scm_priv *p; 131885343a8dSSantosh Sivaraj u64 phys_addr; 131985343a8dSSantosh Sivaraj bool found = false; 132085343a8dSSantosh Sivaraj 132185343a8dSSantosh Sivaraj if (evt->error_type != MCE_ERROR_TYPE_UE) 132285343a8dSSantosh Sivaraj return NOTIFY_DONE; 132385343a8dSSantosh Sivaraj 132485343a8dSSantosh Sivaraj if (list_empty(&papr_nd_regions)) 132585343a8dSSantosh Sivaraj return NOTIFY_DONE; 132685343a8dSSantosh Sivaraj 132785343a8dSSantosh Sivaraj /* 132885343a8dSSantosh Sivaraj * The physical address obtained here is PAGE_SIZE aligned, so get the 132985343a8dSSantosh Sivaraj * exact address from the effective address 133085343a8dSSantosh Sivaraj */ 133185343a8dSSantosh Sivaraj phys_addr = evt->u.ue_error.physical_address + 133285343a8dSSantosh Sivaraj (evt->u.ue_error.effective_address & ~PAGE_MASK); 133385343a8dSSantosh Sivaraj 133485343a8dSSantosh Sivaraj if (!evt->u.ue_error.physical_address_provided || 133585343a8dSSantosh Sivaraj !is_zone_device_page(pfn_to_page(phys_addr >> PAGE_SHIFT))) 133685343a8dSSantosh Sivaraj return NOTIFY_DONE; 133785343a8dSSantosh Sivaraj 133885343a8dSSantosh Sivaraj /* mce notifier is called from a process context, so mutex is safe */ 133985343a8dSSantosh Sivaraj mutex_lock(&papr_ndr_lock); 134085343a8dSSantosh Sivaraj list_for_each_entry(p, &papr_nd_regions, region_list) { 134185343a8dSSantosh Sivaraj if (phys_addr >= p->res.start && phys_addr <= p->res.end) { 134285343a8dSSantosh Sivaraj found = true; 134385343a8dSSantosh Sivaraj break; 134485343a8dSSantosh Sivaraj } 134585343a8dSSantosh Sivaraj } 134685343a8dSSantosh Sivaraj 134785343a8dSSantosh Sivaraj if (found) 134885343a8dSSantosh Sivaraj papr_scm_add_badblock(p->region, p->bus, phys_addr); 134985343a8dSSantosh Sivaraj 135085343a8dSSantosh Sivaraj mutex_unlock(&papr_ndr_lock); 135185343a8dSSantosh Sivaraj 135285343a8dSSantosh Sivaraj return found ? NOTIFY_OK : NOTIFY_DONE; 135385343a8dSSantosh Sivaraj } 135485343a8dSSantosh Sivaraj 135585343a8dSSantosh Sivaraj static struct notifier_block mce_ue_nb = { 135685343a8dSSantosh Sivaraj .notifier_call = handle_mce_ue 135785343a8dSSantosh Sivaraj }; 135885343a8dSSantosh Sivaraj 1359b5beae5eSOliver O'Halloran static int papr_scm_probe(struct platform_device *pdev) 1360b5beae5eSOliver O'Halloran { 1361b5beae5eSOliver O'Halloran struct device_node *dn = pdev->dev.of_node; 1362683ec0e0SOliver O'Halloran u32 drc_index, metadata_size; 1363683ec0e0SOliver O'Halloran u64 blocks, block_size; 1364b5beae5eSOliver O'Halloran struct papr_scm_priv *p; 13650e8554b5SAndy Shevchenko u8 uuid_raw[UUID_SIZE]; 136643001c52SOliver O'Halloran const char *uuid_str; 1367ed78f56eSVaibhav Jain ssize_t stat_size; 13680e8554b5SAndy Shevchenko uuid_t uuid; 1369b5beae5eSOliver O'Halloran int rc; 1370b5beae5eSOliver O'Halloran 1371b5beae5eSOliver O'Halloran /* check we have all the required DT properties */ 1372b5beae5eSOliver O'Halloran if (of_property_read_u32(dn, "ibm,my-drc-index", &drc_index)) { 1373b5beae5eSOliver O'Halloran dev_err(&pdev->dev, "%pOF: missing drc-index!\n", dn); 1374b5beae5eSOliver O'Halloran return -ENODEV; 1375b5beae5eSOliver O'Halloran } 1376b5beae5eSOliver O'Halloran 1377683ec0e0SOliver O'Halloran if (of_property_read_u64(dn, "ibm,block-size", &block_size)) { 1378683ec0e0SOliver O'Halloran dev_err(&pdev->dev, "%pOF: missing block-size!\n", dn); 1379683ec0e0SOliver O'Halloran return -ENODEV; 1380683ec0e0SOliver O'Halloran } 1381683ec0e0SOliver O'Halloran 1382683ec0e0SOliver O'Halloran if (of_property_read_u64(dn, "ibm,number-of-blocks", &blocks)) { 1383683ec0e0SOliver O'Halloran dev_err(&pdev->dev, "%pOF: missing number-of-blocks!\n", dn); 1384b5beae5eSOliver O'Halloran return -ENODEV; 1385b5beae5eSOliver O'Halloran } 1386b5beae5eSOliver O'Halloran 138743001c52SOliver O'Halloran if (of_property_read_string(dn, "ibm,unit-guid", &uuid_str)) { 138843001c52SOliver O'Halloran dev_err(&pdev->dev, "%pOF: missing unit-guid!\n", dn); 138943001c52SOliver O'Halloran return -ENODEV; 139043001c52SOliver O'Halloran } 139143001c52SOliver O'Halloran 1392b277fc79SAneesh Kumar K.V /* 1393b277fc79SAneesh Kumar K.V * open firmware platform device create won't update the NUMA 1394b277fc79SAneesh Kumar K.V * distance table. For PAPR SCM devices we use numa_map_to_online_node() 1395b277fc79SAneesh Kumar K.V * to find the nearest online NUMA node and that requires correct 1396b277fc79SAneesh Kumar K.V * distance table information. 1397b277fc79SAneesh Kumar K.V */ 1398b277fc79SAneesh Kumar K.V update_numa_distance(dn); 13992a0ffbd4SAneesh Kumar K.V 1400b5beae5eSOliver O'Halloran p = kzalloc(sizeof(*p), GFP_KERNEL); 1401b5beae5eSOliver O'Halloran if (!p) 1402b5beae5eSOliver O'Halloran return -ENOMEM; 1403b5beae5eSOliver O'Halloran 1404b791abf3SVaibhav Jain /* Initialize the dimm mutex */ 1405b791abf3SVaibhav Jain mutex_init(&p->health_mutex); 1406b791abf3SVaibhav Jain 1407b5beae5eSOliver O'Halloran /* optional DT properties */ 1408b5beae5eSOliver O'Halloran of_property_read_u32(dn, "ibm,metadata-size", &metadata_size); 1409b5beae5eSOliver O'Halloran 1410b5beae5eSOliver O'Halloran p->dn = dn; 1411b5beae5eSOliver O'Halloran p->drc_index = drc_index; 1412683ec0e0SOliver O'Halloran p->block_size = block_size; 1413683ec0e0SOliver O'Halloran p->blocks = blocks; 14142a0ffbd4SAneesh Kumar K.V p->is_volatile = !of_property_read_bool(dn, "ibm,cache-flush-required"); 141575b7c05eSShivaprasad G Bhat p->hcall_flush_required = of_property_read_bool(dn, "ibm,hcall-flush-required"); 1416b5beae5eSOliver O'Halloran 1417de21e137SVaibhav Jain if (of_property_read_u64(dn, "ibm,persistence-failed-count", 1418de21e137SVaibhav Jain &p->dirty_shutdown_counter)) 1419de21e137SVaibhav Jain p->dirty_shutdown_counter = 0; 1420de21e137SVaibhav Jain 142143001c52SOliver O'Halloran /* We just need to ensure that set cookies are unique across */ 14220e8554b5SAndy Shevchenko uuid_parse(uuid_str, &uuid); 14230e8554b5SAndy Shevchenko 1424259a948cSAneesh Kumar K.V /* 14250e8554b5SAndy Shevchenko * The cookie1 and cookie2 are not really little endian. 14260e8554b5SAndy Shevchenko * We store a raw buffer representation of the 14270e8554b5SAndy Shevchenko * uuid string so that we can compare this with the label 14280e8554b5SAndy Shevchenko * area cookie irrespective of the endian configuration 14290e8554b5SAndy Shevchenko * with which the kernel is built. 14300e8554b5SAndy Shevchenko * 14310e8554b5SAndy Shevchenko * Historically we stored the cookie in the below format. 14320e8554b5SAndy Shevchenko * for a uuid string 72511b67-0b3b-42fd-8d1d-5be3cae8bcaa 14330e8554b5SAndy Shevchenko * cookie1 was 0xfd423b0b671b5172 14340e8554b5SAndy Shevchenko * cookie2 was 0xaabce8cae35b1d8d 1435259a948cSAneesh Kumar K.V */ 14360e8554b5SAndy Shevchenko export_uuid(uuid_raw, &uuid); 14370e8554b5SAndy Shevchenko p->nd_set.cookie1 = get_unaligned_le64(&uuid_raw[0]); 14380e8554b5SAndy Shevchenko p->nd_set.cookie2 = get_unaligned_le64(&uuid_raw[8]); 143943001c52SOliver O'Halloran 1440b5beae5eSOliver O'Halloran /* might be zero */ 1441b5beae5eSOliver O'Halloran p->metadata_size = metadata_size; 1442b5beae5eSOliver O'Halloran p->pdev = pdev; 1443b5beae5eSOliver O'Halloran 1444b5beae5eSOliver O'Halloran /* request the hypervisor to bind this region to somewhere in memory */ 1445b5beae5eSOliver O'Halloran rc = drc_pmem_bind(p); 14463a855b7aSVaibhav Jain 14473a855b7aSVaibhav Jain /* If phyp says drc memory still bound then force unbound and retry */ 1448faa6d211SAneesh Kumar K.V if (rc == H_OVERLAP) 1449faa6d211SAneesh Kumar K.V rc = drc_pmem_query_n_bind(p); 14503a855b7aSVaibhav Jain 14514111cdefSAneesh Kumar K.V if (rc != H_SUCCESS) { 1452faa6d211SAneesh Kumar K.V dev_err(&p->pdev->dev, "bind err: %d\n", rc); 14534111cdefSAneesh Kumar K.V rc = -ENXIO; 1454b5beae5eSOliver O'Halloran goto err; 14554111cdefSAneesh Kumar K.V } 1456b5beae5eSOliver O'Halloran 1457b5beae5eSOliver O'Halloran /* setup the resource for the newly bound range */ 1458b5beae5eSOliver O'Halloran p->res.start = p->bound_addr; 145959613526SOliver O'Halloran p->res.end = p->bound_addr + p->blocks * p->block_size - 1; 1460b5beae5eSOliver O'Halloran p->res.name = pdev->name; 1461b5beae5eSOliver O'Halloran p->res.flags = IORESOURCE_MEM; 1462b5beae5eSOliver O'Halloran 1463ed78f56eSVaibhav Jain /* Try retrieving the stat buffer and see if its supported */ 1464ed78f56eSVaibhav Jain stat_size = drc_pmem_query_stats(p, NULL, 0); 1465ed78f56eSVaibhav Jain if (stat_size > 0) { 1466ed78f56eSVaibhav Jain p->stat_buffer_len = stat_size; 1467ed78f56eSVaibhav Jain dev_dbg(&p->pdev->dev, "Max perf-stat size %lu-bytes\n", 1468ed78f56eSVaibhav Jain p->stat_buffer_len); 1469ed78f56eSVaibhav Jain } 1470ed78f56eSVaibhav Jain 1471b5beae5eSOliver O'Halloran rc = papr_scm_nvdimm_init(p); 1472b5beae5eSOliver O'Halloran if (rc) 1473b5beae5eSOliver O'Halloran goto err2; 1474b5beae5eSOliver O'Halloran 1475b5beae5eSOliver O'Halloran platform_set_drvdata(pdev, p); 14764c08d4bbSKajol Jain papr_scm_pmu_register(p); 1477b5beae5eSOliver O'Halloran 1478b5beae5eSOliver O'Halloran return 0; 1479b5beae5eSOliver O'Halloran 1480b5beae5eSOliver O'Halloran err2: drc_pmem_unbind(p); 1481b5beae5eSOliver O'Halloran err: kfree(p); 1482b5beae5eSOliver O'Halloran return rc; 1483b5beae5eSOliver O'Halloran } 1484b5beae5eSOliver O'Halloran 148518a4a261SUwe Kleine-König static void papr_scm_remove(struct platform_device *pdev) 1486b5beae5eSOliver O'Halloran { 1487b5beae5eSOliver O'Halloran struct papr_scm_priv *p = platform_get_drvdata(pdev); 1488b5beae5eSOliver O'Halloran 148985343a8dSSantosh Sivaraj mutex_lock(&papr_ndr_lock); 149085343a8dSSantosh Sivaraj list_del(&p->region_list); 149185343a8dSSantosh Sivaraj mutex_unlock(&papr_ndr_lock); 149285343a8dSSantosh Sivaraj 1493b5beae5eSOliver O'Halloran nvdimm_bus_unregister(p->bus); 1494b5beae5eSOliver O'Halloran drc_pmem_unbind(p); 14954c08d4bbSKajol Jain 14964c08d4bbSKajol Jain if (pdev->archdata.priv) 14974c08d4bbSKajol Jain unregister_nvdimm_pmu(pdev->archdata.priv); 14984c08d4bbSKajol Jain 14994c08d4bbSKajol Jain pdev->archdata.priv = NULL; 15005649607aSVaibhav Jain kfree(p->bus_desc.provider_name); 1501b5beae5eSOliver O'Halloran kfree(p); 1502b5beae5eSOliver O'Halloran } 1503b5beae5eSOliver O'Halloran 1504b5beae5eSOliver O'Halloran static const struct of_device_id papr_scm_match[] = { 1505b5beae5eSOliver O'Halloran { .compatible = "ibm,pmemory" }, 15068c26ab72SAneesh Kumar K.V { .compatible = "ibm,pmemory-v2" }, 1507b5beae5eSOliver O'Halloran { }, 1508b5beae5eSOliver O'Halloran }; 1509b5beae5eSOliver O'Halloran 1510b5beae5eSOliver O'Halloran static struct platform_driver papr_scm_driver = { 1511b5beae5eSOliver O'Halloran .probe = papr_scm_probe, 151218a4a261SUwe Kleine-König .remove_new = papr_scm_remove, 1513b5beae5eSOliver O'Halloran .driver = { 1514b5beae5eSOliver O'Halloran .name = "papr_scm", 1515b5beae5eSOliver O'Halloran .of_match_table = papr_scm_match, 1516b5beae5eSOliver O'Halloran }, 1517b5beae5eSOliver O'Halloran }; 1518b5beae5eSOliver O'Halloran 151985343a8dSSantosh Sivaraj static int __init papr_scm_init(void) 152085343a8dSSantosh Sivaraj { 152185343a8dSSantosh Sivaraj int ret; 152285343a8dSSantosh Sivaraj 152385343a8dSSantosh Sivaraj ret = platform_driver_register(&papr_scm_driver); 152485343a8dSSantosh Sivaraj if (!ret) 152585343a8dSSantosh Sivaraj mce_register_notifier(&mce_ue_nb); 152685343a8dSSantosh Sivaraj 152785343a8dSSantosh Sivaraj return ret; 152885343a8dSSantosh Sivaraj } 152985343a8dSSantosh Sivaraj module_init(papr_scm_init); 153085343a8dSSantosh Sivaraj 153185343a8dSSantosh Sivaraj static void __exit papr_scm_exit(void) 153285343a8dSSantosh Sivaraj { 153385343a8dSSantosh Sivaraj mce_unregister_notifier(&mce_ue_nb); 153485343a8dSSantosh Sivaraj platform_driver_unregister(&papr_scm_driver); 153585343a8dSSantosh Sivaraj } 153685343a8dSSantosh Sivaraj module_exit(papr_scm_exit); 153785343a8dSSantosh Sivaraj 1538b5beae5eSOliver O'Halloran MODULE_DEVICE_TABLE(of, papr_scm_match); 1539*9c5f6473SJeff Johnson MODULE_DESCRIPTION("PAPR Storage Class Memory interface driver"); 1540b5beae5eSOliver O'Halloran MODULE_LICENSE("GPL"); 1541b5beae5eSOliver O'Halloran MODULE_AUTHOR("IBM Corporation"); 1542