* drivers/s390/char/sclp_cmd.c
*
* Copyright IBM Corp. 2007
- * Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
+ * Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>,
+ * Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
*/
#include <linux/completion.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/mmzone.h>
+#include <linux/memory.h>
+#include <asm/chpid.h>
#include <asm/sclp.h>
#include "sclp.h"
u64 sclp_facilities;
static u8 sclp_fac84;
+static unsigned long long rzm;
+static unsigned long long rnmax;
static int __init sclp_cmd_sync_early(sclp_cmdw_t cmd, void *sccb)
{
return rc;
}
-void __init sclp_read_info_early(void)
+static void __init sclp_read_info_early(void)
{
int rc;
int i;
void __init sclp_facilities_detect(void)
{
+ struct read_info_sccb *sccb;
+
+ sclp_read_info_early();
if (!early_read_info_sccb_valid)
return;
- sclp_facilities = early_read_info_sccb.facilities;
- sclp_fac84 = early_read_info_sccb.fac84;
+
+ sccb = &early_read_info_sccb;
+ sclp_facilities = sccb->facilities;
+ sclp_fac84 = sccb->fac84;
+ rnmax = sccb->rnmax ? sccb->rnmax : sccb->rnmax2;
+ rzm = sccb->rnsize ? sccb->rnsize : sccb->rnsize2;
+ rzm <<= 20;
}
-unsigned long long __init sclp_memory_detect(void)
+unsigned long long sclp_get_rnmax(void)
{
- unsigned long long memsize;
- struct read_info_sccb *sccb;
+ return rnmax;
+}
- if (!early_read_info_sccb_valid)
- return 0;
- sccb = &early_read_info_sccb;
- if (sccb->rnsize)
- memsize = sccb->rnsize << 20;
- else
- memsize = sccb->rnsize2 << 20;
- if (sccb->rnmax)
- memsize *= sccb->rnmax;
- else
- memsize *= sccb->rnmax2;
- return memsize;
+unsigned long long sclp_get_rzm(void)
+{
+ return rzm;
}
/*
- * This function will be called after sclp_memory_detect(), which gets called
- * early from early.c code. Therefore the sccb should have valid contents.
+ * This function will be called after sclp_facilities_detect(), which gets
+ * called from early.c code. Therefore the sccb should have valid contents.
*/
void __init sclp_get_ipl_info(struct sclp_ipl_info *info)
{
u8 reserved[4096 - 16];
} __attribute__((packed, aligned(PAGE_SIZE)));
-static struct read_cpu_info_sccb __initdata early_read_cpu_info_sccb;
-static struct sclp_cpu_info __initdata sclp_cpu_info;
-
static void sclp_fill_cpu_info(struct sclp_cpu_info *info,
struct read_cpu_info_sccb *sccb)
{
info->combined * sizeof(struct sclp_cpu_entry));
}
-void __init sclp_read_cpu_info_early(void)
+int sclp_get_cpu_info(struct sclp_cpu_info *info)
{
int rc;
struct read_cpu_info_sccb *sccb;
- if (!SCLP_HAS_CPU_INFO)
- return;
-
- sccb = &early_read_cpu_info_sccb;
- do {
- memset(sccb, 0, sizeof(*sccb));
- sccb->header.length = sizeof(*sccb);
- rc = sclp_cmd_sync_early(SCLP_CMDW_READ_CPU_INFO, sccb);
- } while (rc == -EBUSY);
-
- if (rc)
- return;
- if (sccb->header.response_code != 0x10)
- return;
- sclp_fill_cpu_info(&sclp_cpu_info, sccb);
-}
-
-static int __init sclp_get_cpu_info_early(struct sclp_cpu_info *info)
-{
if (!SCLP_HAS_CPU_INFO)
return -EOPNOTSUPP;
- *info = sclp_cpu_info;
- return 0;
-}
-
-static int sclp_get_cpu_info_late(struct sclp_cpu_info *info)
-{
- int rc;
- struct read_cpu_info_sccb *sccb;
-
- if (!SCLP_HAS_CPU_INFO)
- return -EOPNOTSUPP;
- sccb = (struct read_cpu_info_sccb *) __get_free_page(GFP_KERNEL
- | GFP_DMA);
+ sccb = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
if (!sccb)
return -ENOMEM;
- memset(sccb, 0, sizeof(*sccb));
sccb->header.length = sizeof(*sccb);
rc = do_sync_request(SCLP_CMDW_READ_CPU_INFO, sccb);
if (rc)
return rc;
}
-int __init_refok sclp_get_cpu_info(struct sclp_cpu_info *info)
-{
- if (slab_is_available())
- return sclp_get_cpu_info_late(info);
- return sclp_get_cpu_info_early(info);
-}
-
struct cpu_configure_sccb {
struct sccb_header header;
} __attribute__((packed, aligned(8)));
{
return do_cpu_configure(SCLP_CMDW_DECONFIGURE_CPU | cpu << 8);
}
+
+#ifdef CONFIG_MEMORY_HOTPLUG
+
+static DEFINE_MUTEX(sclp_mem_mutex);
+static LIST_HEAD(sclp_mem_list);
+static u8 sclp_max_storage_id;
+static unsigned long sclp_storage_ids[256 / BITS_PER_LONG];
+
+struct memory_increment {
+ struct list_head list;
+ u16 rn;
+ int standby;
+ int usecount;
+};
+
+struct assign_storage_sccb {
+ struct sccb_header header;
+ u16 rn;
+} __packed;
+
+static unsigned long long rn2addr(u16 rn)
+{
+ return (unsigned long long) (rn - 1) * rzm;
+}
+
+static int do_assign_storage(sclp_cmdw_t cmd, u16 rn)
+{
+ struct assign_storage_sccb *sccb;
+ int rc;
+
+ sccb = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
+ if (!sccb)
+ return -ENOMEM;
+ sccb->header.length = PAGE_SIZE;
+ sccb->rn = rn;
+ rc = do_sync_request(cmd, sccb);
+ if (rc)
+ goto out;
+ switch (sccb->header.response_code) {
+ case 0x0020:
+ case 0x0120:
+ break;
+ default:
+ rc = -EIO;
+ break;
+ }
+out:
+ free_page((unsigned long) sccb);
+ return rc;
+}
+
+static int sclp_assign_storage(u16 rn)
+{
+ return do_assign_storage(0x000d0001, rn);
+}
+
+static int sclp_unassign_storage(u16 rn)
+{
+ return do_assign_storage(0x000c0001, rn);
+}
+
+struct attach_storage_sccb {
+ struct sccb_header header;
+ u16 :16;
+ u16 assigned;
+ u32 :32;
+ u32 entries[0];
+} __packed;
+
+static int sclp_attach_storage(u8 id)
+{
+ struct attach_storage_sccb *sccb;
+ int rc;
+ int i;
+
+ sccb = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
+ if (!sccb)
+ return -ENOMEM;
+ sccb->header.length = PAGE_SIZE;
+ rc = do_sync_request(0x00080001 | id << 8, sccb);
+ if (rc)
+ goto out;
+ switch (sccb->header.response_code) {
+ case 0x0020:
+ set_bit(id, sclp_storage_ids);
+ for (i = 0; i < sccb->assigned; i++)
+ sclp_unassign_storage(sccb->entries[i] >> 16);
+ break;
+ default:
+ rc = -EIO;
+ break;
+ }
+out:
+ free_page((unsigned long) sccb);
+ return rc;
+}
+
+static int sclp_mem_change_state(unsigned long start, unsigned long size,
+ int online)
+{
+ struct memory_increment *incr;
+ unsigned long long istart;
+ int rc = 0;
+
+ list_for_each_entry(incr, &sclp_mem_list, list) {
+ istart = rn2addr(incr->rn);
+ if (start + size - 1 < istart)
+ break;
+ if (start > istart + rzm - 1)
+ continue;
+ if (online) {
+ if (incr->usecount++)
+ continue;
+ /*
+ * Don't break the loop if one assign fails. Loop may
+ * be walked again on CANCEL and we can't save
+ * information if state changed before or not.
+ * So continue and increase usecount for all increments.
+ */
+ rc |= sclp_assign_storage(incr->rn);
+ } else {
+ if (--incr->usecount)
+ continue;
+ sclp_unassign_storage(incr->rn);
+ }
+ }
+ return rc ? -EIO : 0;
+}
+
+static int sclp_mem_notifier(struct notifier_block *nb,
+ unsigned long action, void *data)
+{
+ unsigned long start, size;
+ struct memory_notify *arg;
+ unsigned char id;
+ int rc = 0;
+
+ arg = data;
+ start = arg->start_pfn << PAGE_SHIFT;
+ size = arg->nr_pages << PAGE_SHIFT;
+ mutex_lock(&sclp_mem_mutex);
+ for (id = 0; id <= sclp_max_storage_id; id++)
+ if (!test_bit(id, sclp_storage_ids))
+ sclp_attach_storage(id);
+ switch (action) {
+ case MEM_ONLINE:
+ case MEM_GOING_OFFLINE:
+ case MEM_CANCEL_OFFLINE:
+ break;
+ case MEM_GOING_ONLINE:
+ rc = sclp_mem_change_state(start, size, 1);
+ break;
+ case MEM_CANCEL_ONLINE:
+ sclp_mem_change_state(start, size, 0);
+ break;
+ case MEM_OFFLINE:
+ sclp_mem_change_state(start, size, 0);
+ break;
+ default:
+ rc = -EINVAL;
+ break;
+ }
+ mutex_unlock(&sclp_mem_mutex);
+ return rc ? NOTIFY_BAD : NOTIFY_OK;
+}
+
+static struct notifier_block sclp_mem_nb = {
+ .notifier_call = sclp_mem_notifier,
+};
+
+static void __init add_memory_merged(u16 rn)
+{
+ static u16 first_rn, num;
+ unsigned long long start, size;
+
+ if (rn && first_rn && (first_rn + num == rn)) {
+ num++;
+ return;
+ }
+ if (!first_rn)
+ goto skip_add;
+ start = rn2addr(first_rn);
+ size = (unsigned long long ) num * rzm;
+ if (start >= VMEM_MAX_PHYS)
+ goto skip_add;
+ if (start + size > VMEM_MAX_PHYS)
+ size = VMEM_MAX_PHYS - start;
+ add_memory(0, start, size);
+skip_add:
+ first_rn = rn;
+ num = 1;
+}
+
+static void __init sclp_add_standby_memory(void)
+{
+ struct memory_increment *incr;
+
+ list_for_each_entry(incr, &sclp_mem_list, list)
+ if (incr->standby)
+ add_memory_merged(incr->rn);
+ add_memory_merged(0);
+}
+
+static void __init insert_increment(u16 rn, int standby, int assigned)
+{
+ struct memory_increment *incr, *new_incr;
+ struct list_head *prev;
+ u16 last_rn;
+
+ new_incr = kzalloc(sizeof(*new_incr), GFP_KERNEL);
+ if (!new_incr)
+ return;
+ new_incr->rn = rn;
+ new_incr->standby = standby;
+ last_rn = 0;
+ prev = &sclp_mem_list;
+ list_for_each_entry(incr, &sclp_mem_list, list) {
+ if (assigned && incr->rn > rn)
+ break;
+ if (!assigned && incr->rn - last_rn > 1)
+ break;
+ last_rn = incr->rn;
+ prev = &incr->list;
+ }
+ if (!assigned)
+ new_incr->rn = last_rn + 1;
+ if (new_incr->rn > rnmax) {
+ kfree(new_incr);
+ return;
+ }
+ list_add(&new_incr->list, prev);
+}
+
+struct read_storage_sccb {
+ struct sccb_header header;
+ u16 max_id;
+ u16 assigned;
+ u16 standby;
+ u16 :16;
+ u32 entries[0];
+} __packed;
+
+static int __init sclp_detect_standby_memory(void)
+{
+ struct read_storage_sccb *sccb;
+ int i, id, assigned, rc;
+
+ if (!early_read_info_sccb_valid)
+ return 0;
+ if ((sclp_facilities & 0xe00000000000ULL) != 0xe00000000000ULL)
+ return 0;
+ rc = -ENOMEM;
+ sccb = (void *) __get_free_page(GFP_KERNEL | GFP_DMA);
+ if (!sccb)
+ goto out;
+ assigned = 0;
+ for (id = 0; id <= sclp_max_storage_id; id++) {
+ memset(sccb, 0, PAGE_SIZE);
+ sccb->header.length = PAGE_SIZE;
+ rc = do_sync_request(0x00040001 | id << 8, sccb);
+ if (rc)
+ goto out;
+ switch (sccb->header.response_code) {
+ case 0x0010:
+ set_bit(id, sclp_storage_ids);
+ for (i = 0; i < sccb->assigned; i++) {
+ if (!sccb->entries[i])
+ continue;
+ assigned++;
+ insert_increment(sccb->entries[i] >> 16, 0, 1);
+ }
+ break;
+ case 0x0310:
+ break;
+ case 0x0410:
+ for (i = 0; i < sccb->assigned; i++) {
+ if (!sccb->entries[i])
+ continue;
+ assigned++;
+ insert_increment(sccb->entries[i] >> 16, 1, 1);
+ }
+ break;
+ default:
+ rc = -EIO;
+ break;
+ }
+ if (!rc)
+ sclp_max_storage_id = sccb->max_id;
+ }
+ if (rc || list_empty(&sclp_mem_list))
+ goto out;
+ for (i = 1; i <= rnmax - assigned; i++)
+ insert_increment(0, 1, 0);
+ rc = register_memory_notifier(&sclp_mem_nb);
+ if (rc)
+ goto out;
+ sclp_add_standby_memory();
+out:
+ free_page((unsigned long) sccb);
+ return rc;
+}
+__initcall(sclp_detect_standby_memory);
+
+#endif /* CONFIG_MEMORY_HOTPLUG */
+
+/*
+ * Channel path configuration related functions.
+ */
+
+#define SCLP_CMDW_CONFIGURE_CHPATH 0x000f0001
+#define SCLP_CMDW_DECONFIGURE_CHPATH 0x000e0001
+#define SCLP_CMDW_READ_CHPATH_INFORMATION 0x00030001
+
+struct chp_cfg_sccb {
+ struct sccb_header header;
+ u8 ccm;
+ u8 reserved[6];
+ u8 cssid;
+} __attribute__((packed));
+
+static int do_chp_configure(sclp_cmdw_t cmd)
+{
+ struct chp_cfg_sccb *sccb;
+ int rc;
+
+ if (!SCLP_HAS_CHP_RECONFIG)
+ return -EOPNOTSUPP;
+ /* Prepare sccb. */
+ sccb = (struct chp_cfg_sccb *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
+ if (!sccb)
+ return -ENOMEM;
+ sccb->header.length = sizeof(*sccb);
+ rc = do_sync_request(cmd, sccb);
+ if (rc)
+ goto out;
+ switch (sccb->header.response_code) {
+ case 0x0020:
+ case 0x0120:
+ case 0x0440:
+ case 0x0450:
+ break;
+ default:
+ printk(KERN_WARNING TAG "configure channel-path failed "
+ "(cmd=0x%08x, response=0x%04x)\n", cmd,
+ sccb->header.response_code);
+ rc = -EIO;
+ break;
+ }
+out:
+ free_page((unsigned long) sccb);
+ return rc;
+}
+
+/**
+ * sclp_chp_configure - perform configure channel-path sclp command
+ * @chpid: channel-path ID
+ *
+ * Perform configure channel-path command sclp command for specified chpid.
+ * Return 0 after command successfully finished, non-zero otherwise.
+ */
+int sclp_chp_configure(struct chp_id chpid)
+{
+ return do_chp_configure(SCLP_CMDW_CONFIGURE_CHPATH | chpid.id << 8);
+}
+
+/**
+ * sclp_chp_deconfigure - perform deconfigure channel-path sclp command
+ * @chpid: channel-path ID
+ *
+ * Perform deconfigure channel-path command sclp command for specified chpid
+ * and wait for completion. On success return 0. Return non-zero otherwise.
+ */
+int sclp_chp_deconfigure(struct chp_id chpid)
+{
+ return do_chp_configure(SCLP_CMDW_DECONFIGURE_CHPATH | chpid.id << 8);
+}
+
+struct chp_info_sccb {
+ struct sccb_header header;
+ u8 recognized[SCLP_CHP_INFO_MASK_SIZE];
+ u8 standby[SCLP_CHP_INFO_MASK_SIZE];
+ u8 configured[SCLP_CHP_INFO_MASK_SIZE];
+ u8 ccm;
+ u8 reserved[6];
+ u8 cssid;
+} __attribute__((packed));
+
+/**
+ * sclp_chp_read_info - perform read channel-path information sclp command
+ * @info: resulting channel-path information data
+ *
+ * Perform read channel-path information sclp command and wait for completion.
+ * On success, store channel-path information in @info and return 0. Return
+ * non-zero otherwise.
+ */
+int sclp_chp_read_info(struct sclp_chp_info *info)
+{
+ struct chp_info_sccb *sccb;
+ int rc;
+
+ if (!SCLP_HAS_CHP_INFO)
+ return -EOPNOTSUPP;
+ /* Prepare sccb. */
+ sccb = (struct chp_info_sccb *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
+ if (!sccb)
+ return -ENOMEM;
+ sccb->header.length = sizeof(*sccb);
+ rc = do_sync_request(SCLP_CMDW_READ_CHPATH_INFORMATION, sccb);
+ if (rc)
+ goto out;
+ if (sccb->header.response_code != 0x0010) {
+ printk(KERN_WARNING TAG "read channel-path info failed "
+ "(response=0x%04x)\n", sccb->header.response_code);
+ rc = -EIO;
+ goto out;
+ }
+ memcpy(info->recognized, sccb->recognized, SCLP_CHP_INFO_MASK_SIZE);
+ memcpy(info->standby, sccb->standby, SCLP_CHP_INFO_MASK_SIZE);
+ memcpy(info->configured, sccb->configured, SCLP_CHP_INFO_MASK_SIZE);
+out:
+ free_page((unsigned long) sccb);
+ return rc;
+}
projects / linux-2.6-omap-h63xx.git / blobdiff