^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright IBM Corp. 2007,2012
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #define KMSG_COMPONENT "sclp_cmd"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/completion.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/export.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/mmzone.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/memory.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <asm/ctl_reg.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <asm/chpid.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <asm/setup.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <asm/page.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include <asm/sclp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include <asm/numa.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include "sclp.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) static void sclp_sync_callback(struct sclp_req *req, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) struct completion *completion = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) complete(completion);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) int sclp_sync_request(sclp_cmdw_t cmd, void *sccb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) return sclp_sync_request_timeout(cmd, sccb, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) int sclp_sync_request_timeout(sclp_cmdw_t cmd, void *sccb, int timeout)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) struct completion completion;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) struct sclp_req *request;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) request = kzalloc(sizeof(*request), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) if (!request)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) if (timeout)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) request->queue_timeout = timeout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) request->command = cmd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) request->sccb = sccb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) request->status = SCLP_REQ_FILLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) request->callback = sclp_sync_callback;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) request->callback_data = &completion;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) init_completion(&completion);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) /* Perform sclp request. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) rc = sclp_add_request(request);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) wait_for_completion(&completion);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) /* Check response. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) if (request->status != SCLP_REQ_DONE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) pr_warn("sync request failed (cmd=0x%08x, status=0x%02x)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) cmd, request->status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) rc = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) kfree(request);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) * CPU configuration related functions.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) #define SCLP_CMDW_CONFIGURE_CPU 0x00110001
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) #define SCLP_CMDW_DECONFIGURE_CPU 0x00100001
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) int _sclp_get_core_info(struct sclp_core_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) struct read_cpu_info_sccb *sccb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) if (!SCLP_HAS_CPU_INFO)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) sccb = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) if (!sccb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) sccb->header.length = sizeof(*sccb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) rc = sclp_sync_request_timeout(SCLP_CMDW_READ_CPU_INFO, sccb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) SCLP_QUEUE_INTERVAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) if (sccb->header.response_code != 0x0010) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) pr_warn("readcpuinfo failed (response=0x%04x)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) sccb->header.response_code);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) rc = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) sclp_fill_core_info(info, sccb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) free_page((unsigned long) sccb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) struct cpu_configure_sccb {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) struct sccb_header header;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) } __attribute__((packed, aligned(8)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) static int do_core_configure(sclp_cmdw_t cmd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) struct cpu_configure_sccb *sccb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) if (!SCLP_HAS_CPU_RECONFIG)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) * This is not going to cross a page boundary since we force
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) * kmalloc to have a minimum alignment of 8 bytes on s390.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) sccb = kzalloc(sizeof(*sccb), GFP_KERNEL | GFP_DMA);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) if (!sccb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) sccb->header.length = sizeof(*sccb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) rc = sclp_sync_request_timeout(cmd, sccb, SCLP_QUEUE_INTERVAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) switch (sccb->header.response_code) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) case 0x0020:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) case 0x0120:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) pr_warn("configure cpu failed (cmd=0x%08x, response=0x%04x)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) cmd, sccb->header.response_code);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) rc = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) kfree(sccb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) int sclp_core_configure(u8 core)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) return do_core_configure(SCLP_CMDW_CONFIGURE_CPU | core << 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) int sclp_core_deconfigure(u8 core)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) return do_core_configure(SCLP_CMDW_DECONFIGURE_CPU | core << 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) #ifdef CONFIG_MEMORY_HOTPLUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) static DEFINE_MUTEX(sclp_mem_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) static LIST_HEAD(sclp_mem_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) static u8 sclp_max_storage_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) static DECLARE_BITMAP(sclp_storage_ids, 256);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) static int sclp_mem_state_changed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) struct memory_increment {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) struct list_head list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) u16 rn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) int standby;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) struct assign_storage_sccb {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) struct sccb_header header;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) u16 rn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) } __packed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) int arch_get_memory_phys_device(unsigned long start_pfn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) if (!sclp.rzm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) return PFN_PHYS(start_pfn) >> ilog2(sclp.rzm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) static unsigned long long rn2addr(u16 rn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) return (unsigned long long) (rn - 1) * sclp.rzm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) static int do_assign_storage(sclp_cmdw_t cmd, u16 rn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) struct assign_storage_sccb *sccb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) sccb = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) if (!sccb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) sccb->header.length = PAGE_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) sccb->rn = rn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) rc = sclp_sync_request_timeout(cmd, sccb, SCLP_QUEUE_INTERVAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) switch (sccb->header.response_code) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) case 0x0020:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) case 0x0120:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) pr_warn("assign storage failed (cmd=0x%08x, response=0x%04x, rn=0x%04x)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) cmd, sccb->header.response_code, rn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) rc = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) free_page((unsigned long) sccb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) static int sclp_assign_storage(u16 rn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) unsigned long long start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) rc = do_assign_storage(0x000d0001, rn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) start = rn2addr(rn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) storage_key_init_range(start, start + sclp.rzm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) static int sclp_unassign_storage(u16 rn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) return do_assign_storage(0x000c0001, rn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) struct attach_storage_sccb {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) struct sccb_header header;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) u16 :16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) u16 assigned;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) u32 :32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) u32 entries[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) } __packed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) static int sclp_attach_storage(u8 id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) struct attach_storage_sccb *sccb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) sccb = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) if (!sccb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) sccb->header.length = PAGE_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) sccb->header.function_code = 0x40;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) rc = sclp_sync_request_timeout(0x00080001 | id << 8, sccb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) SCLP_QUEUE_INTERVAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) switch (sccb->header.response_code) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) case 0x0020:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) set_bit(id, sclp_storage_ids);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) for (i = 0; i < sccb->assigned; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) if (sccb->entries[i])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) sclp_unassign_storage(sccb->entries[i] >> 16);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) rc = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) free_page((unsigned long) sccb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) static int sclp_mem_change_state(unsigned long start, unsigned long size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) int online)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) struct memory_increment *incr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) unsigned long long istart;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) int rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) list_for_each_entry(incr, &sclp_mem_list, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) istart = rn2addr(incr->rn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) if (start + size - 1 < istart)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) if (start > istart + sclp.rzm - 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) if (online)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) rc |= sclp_assign_storage(incr->rn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) sclp_unassign_storage(incr->rn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) if (rc == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) incr->standby = online ? 0 : 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) return rc ? -EIO : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) static bool contains_standby_increment(unsigned long start, unsigned long end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) struct memory_increment *incr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) unsigned long istart;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) list_for_each_entry(incr, &sclp_mem_list, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) istart = rn2addr(incr->rn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) if (end - 1 < istart)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) if (start > istart + sclp.rzm - 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) if (incr->standby)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) static int sclp_mem_notifier(struct notifier_block *nb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) unsigned long action, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) unsigned long start, size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) struct memory_notify *arg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) unsigned char id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) int rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) arg = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) start = arg->start_pfn << PAGE_SHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) size = arg->nr_pages << PAGE_SHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) mutex_lock(&sclp_mem_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) for_each_clear_bit(id, sclp_storage_ids, sclp_max_storage_id + 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) sclp_attach_storage(id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) switch (action) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) case MEM_GOING_OFFLINE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) * We do not allow to set memory blocks offline that contain
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) * standby memory. This is done to simplify the "memory online"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) * case.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) if (contains_standby_increment(start, start + size))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) rc = -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) case MEM_ONLINE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) case MEM_CANCEL_OFFLINE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) case MEM_GOING_ONLINE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) rc = sclp_mem_change_state(start, size, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) case MEM_CANCEL_ONLINE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) sclp_mem_change_state(start, size, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) case MEM_OFFLINE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) sclp_mem_change_state(start, size, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) rc = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) if (!rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) sclp_mem_state_changed = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) mutex_unlock(&sclp_mem_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) return rc ? NOTIFY_BAD : NOTIFY_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) static struct notifier_block sclp_mem_nb = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) .notifier_call = sclp_mem_notifier,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) static void __init align_to_block_size(unsigned long long *start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) unsigned long long *size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) unsigned long long alignment)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) unsigned long long start_align, size_align;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) start_align = roundup(*start, alignment);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) size_align = rounddown(*start + *size, alignment) - start_align;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) pr_info("Standby memory at 0x%llx (%lluM of %lluM usable)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) *start, size_align >> 20, *size >> 20);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) *start = start_align;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) *size = size_align;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) static void __init add_memory_merged(u16 rn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) unsigned long long start, size, addr, block_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) static u16 first_rn, num;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) if (rn && first_rn && (first_rn + num == rn)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) num++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) if (!first_rn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) goto skip_add;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) start = rn2addr(first_rn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) size = (unsigned long long) num * sclp.rzm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) if (start >= VMEM_MAX_PHYS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) goto skip_add;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) if (start + size > VMEM_MAX_PHYS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) size = VMEM_MAX_PHYS - start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) if (memory_end_set && (start >= memory_end))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) goto skip_add;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) if (memory_end_set && (start + size > memory_end))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) size = memory_end - start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) block_size = memory_block_size_bytes();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) align_to_block_size(&start, &size, block_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) if (!size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) goto skip_add;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) for (addr = start; addr < start + size; addr += block_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) add_memory(0, addr, block_size, MHP_NONE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) skip_add:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) first_rn = rn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) num = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) static void __init sclp_add_standby_memory(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) struct memory_increment *incr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) list_for_each_entry(incr, &sclp_mem_list, list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) if (incr->standby)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) add_memory_merged(incr->rn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) add_memory_merged(0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) static void __init insert_increment(u16 rn, int standby, int assigned)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) struct memory_increment *incr, *new_incr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) struct list_head *prev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) u16 last_rn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) new_incr = kzalloc(sizeof(*new_incr), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) if (!new_incr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) new_incr->rn = rn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) new_incr->standby = standby;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) last_rn = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) prev = &sclp_mem_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) list_for_each_entry(incr, &sclp_mem_list, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) if (assigned && incr->rn > rn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) if (!assigned && incr->rn - last_rn > 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) last_rn = incr->rn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) prev = &incr->list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) if (!assigned)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) new_incr->rn = last_rn + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) if (new_incr->rn > sclp.rnmax) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) kfree(new_incr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) list_add(&new_incr->list, prev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) static int sclp_mem_freeze(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) if (!sclp_mem_state_changed)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) pr_err("Memory hotplug state changed, suspend refused.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) return -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) static const struct dev_pm_ops sclp_mem_pm_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) .freeze = sclp_mem_freeze,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) static struct platform_driver sclp_mem_pdrv = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) .name = "sclp_mem",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) .pm = &sclp_mem_pm_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) static int __init sclp_detect_standby_memory(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) struct platform_device *sclp_pdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) struct read_storage_sccb *sccb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) int i, id, assigned, rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) if (OLDMEM_BASE) /* No standby memory in kdump mode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) if ((sclp.facilities & 0xe00000000000ULL) != 0xe00000000000ULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) rc = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) sccb = (void *) __get_free_page(GFP_KERNEL | GFP_DMA);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) if (!sccb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) assigned = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) for (id = 0; id <= sclp_max_storage_id; id++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) memset(sccb, 0, PAGE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) sccb->header.length = PAGE_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) rc = sclp_sync_request(SCLP_CMDW_READ_STORAGE_INFO | id << 8, sccb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) switch (sccb->header.response_code) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) case 0x0010:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) set_bit(id, sclp_storage_ids);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) for (i = 0; i < sccb->assigned; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) if (!sccb->entries[i])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) assigned++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) insert_increment(sccb->entries[i] >> 16, 0, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) case 0x0310:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) case 0x0410:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) for (i = 0; i < sccb->assigned; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) if (!sccb->entries[i])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) assigned++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) insert_increment(sccb->entries[i] >> 16, 1, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) rc = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) if (!rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) sclp_max_storage_id = sccb->max_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) if (rc || list_empty(&sclp_mem_list))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) for (i = 1; i <= sclp.rnmax - assigned; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) insert_increment(0, 1, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) rc = register_memory_notifier(&sclp_mem_nb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) rc = platform_driver_register(&sclp_mem_pdrv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) sclp_pdev = platform_device_register_simple("sclp_mem", -1, NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) rc = PTR_ERR_OR_ZERO(sclp_pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) goto out_driver;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) sclp_add_standby_memory();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) out_driver:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) platform_driver_unregister(&sclp_mem_pdrv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) free_page((unsigned long) sccb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) __initcall(sclp_detect_standby_memory);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) #endif /* CONFIG_MEMORY_HOTPLUG */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) * Channel path configuration related functions.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) #define SCLP_CMDW_CONFIGURE_CHPATH 0x000f0001
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) #define SCLP_CMDW_DECONFIGURE_CHPATH 0x000e0001
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) #define SCLP_CMDW_READ_CHPATH_INFORMATION 0x00030001
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) struct chp_cfg_sccb {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) struct sccb_header header;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) u8 ccm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) u8 reserved[6];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) u8 cssid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) } __attribute__((packed));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) static int do_chp_configure(sclp_cmdw_t cmd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) struct chp_cfg_sccb *sccb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) if (!SCLP_HAS_CHP_RECONFIG)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) /* Prepare sccb. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) sccb = (struct chp_cfg_sccb *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) if (!sccb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) sccb->header.length = sizeof(*sccb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) rc = sclp_sync_request(cmd, sccb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) switch (sccb->header.response_code) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) case 0x0020:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) case 0x0120:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) case 0x0440:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) case 0x0450:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) pr_warn("configure channel-path failed (cmd=0x%08x, response=0x%04x)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) cmd, sccb->header.response_code);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) rc = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) free_page((unsigned long) sccb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) * sclp_chp_configure - perform configure channel-path sclp command
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) * @chpid: channel-path ID
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) * Perform configure channel-path command sclp command for specified chpid.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) * Return 0 after command successfully finished, non-zero otherwise.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) int sclp_chp_configure(struct chp_id chpid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) return do_chp_configure(SCLP_CMDW_CONFIGURE_CHPATH | chpid.id << 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) * sclp_chp_deconfigure - perform deconfigure channel-path sclp command
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) * @chpid: channel-path ID
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) * Perform deconfigure channel-path command sclp command for specified chpid
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) * and wait for completion. On success return 0. Return non-zero otherwise.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) int sclp_chp_deconfigure(struct chp_id chpid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) return do_chp_configure(SCLP_CMDW_DECONFIGURE_CHPATH | chpid.id << 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) struct chp_info_sccb {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) struct sccb_header header;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) u8 recognized[SCLP_CHP_INFO_MASK_SIZE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) u8 standby[SCLP_CHP_INFO_MASK_SIZE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) u8 configured[SCLP_CHP_INFO_MASK_SIZE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) u8 ccm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) u8 reserved[6];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) u8 cssid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) } __attribute__((packed));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) * sclp_chp_read_info - perform read channel-path information sclp command
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) * @info: resulting channel-path information data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) * Perform read channel-path information sclp command and wait for completion.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) * On success, store channel-path information in @info and return 0. Return
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) * non-zero otherwise.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) int sclp_chp_read_info(struct sclp_chp_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) struct chp_info_sccb *sccb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) if (!SCLP_HAS_CHP_INFO)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) /* Prepare sccb. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) sccb = (struct chp_info_sccb *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) if (!sccb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) sccb->header.length = sizeof(*sccb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) rc = sclp_sync_request(SCLP_CMDW_READ_CHPATH_INFORMATION, sccb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) if (sccb->header.response_code != 0x0010) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) pr_warn("read channel-path info failed (response=0x%04x)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) sccb->header.response_code);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) rc = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) memcpy(info->recognized, sccb->recognized, SCLP_CHP_INFO_MASK_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) memcpy(info->standby, sccb->standby, SCLP_CHP_INFO_MASK_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) memcpy(info->configured, sccb->configured, SCLP_CHP_INFO_MASK_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) free_page((unsigned long) sccb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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