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-rw-r--r--drivers/s390/char/Makefile2
-rw-r--r--drivers/s390/char/sclp.h4
-rw-r--r--drivers/s390/char/sclp_cmd.c319
-rw-r--r--drivers/s390/char/sclp_info.c116
4 files changed, 322 insertions, 119 deletions
diff --git a/drivers/s390/char/Makefile b/drivers/s390/char/Makefile
index bee3a3af691..9317333ec14 100644
--- a/drivers/s390/char/Makefile
+++ b/drivers/s390/char/Makefile
@@ -3,7 +3,7 @@
#
obj-y += ctrlchar.o keyboard.o defkeymap.o sclp.o sclp_rw.o sclp_quiesce.o \
- sclp_info.o sclp_config.o sclp_chp.o sclp_cpi_sys.o
+ sclp_cmd.o sclp_config.o sclp_chp.o sclp_cpi_sys.o
obj-$(CONFIG_TN3270) += raw3270.o
obj-$(CONFIG_TN3270_CONSOLE) += con3270.o
diff --git a/drivers/s390/char/sclp.h b/drivers/s390/char/sclp.h
index c7318a12585..aa8186d18ae 100644
--- a/drivers/s390/char/sclp.h
+++ b/drivers/s390/char/sclp.h
@@ -56,8 +56,6 @@ typedef unsigned int sclp_cmdw_t;
#define SCLP_CMDW_READ_EVENT_DATA 0x00770005
#define SCLP_CMDW_WRITE_EVENT_DATA 0x00760005
#define SCLP_CMDW_WRITE_EVENT_MASK 0x00780005
-#define SCLP_CMDW_READ_SCP_INFO 0x00020001
-#define SCLP_CMDW_READ_SCP_INFO_FORCED 0x00120001
#define GDS_ID_MDSMU 0x1310
#define GDS_ID_MDSROUTEINFO 0x1311
@@ -83,6 +81,8 @@ extern u64 sclp_facilities;
#define SCLP_HAS_CHP_INFO (sclp_facilities & 0x8000000000000000ULL)
#define SCLP_HAS_CHP_RECONFIG (sclp_facilities & 0x2000000000000000ULL)
+#define SCLP_HAS_CPU_INFO (sclp_facilities & 0x0800000000000000ULL)
+#define SCLP_HAS_CPU_RECONFIG (sclp_facilities & 0x0400000000000000ULL)
struct gds_subvector {
u8 length;
diff --git a/drivers/s390/char/sclp_cmd.c b/drivers/s390/char/sclp_cmd.c
new file mode 100644
index 00000000000..ba004fd43c0
--- /dev/null
+++ b/drivers/s390/char/sclp_cmd.c
@@ -0,0 +1,319 @@
+/*
+ * drivers/s390/char/sclp_cmd.c
+ *
+ * Copyright IBM Corp. 2007
+ * Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
+ */
+
+#include <linux/completion.h>
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <asm/sclp.h>
+#include "sclp.h"
+
+#define TAG "sclp_cmd: "
+
+#define SCLP_CMDW_READ_SCP_INFO 0x00020001
+#define SCLP_CMDW_READ_SCP_INFO_FORCED 0x00120001
+
+struct read_info_sccb {
+ struct sccb_header header; /* 0-7 */
+ u16 rnmax; /* 8-9 */
+ u8 rnsize; /* 10 */
+ u8 _reserved0[24 - 11]; /* 11-15 */
+ u8 loadparm[8]; /* 24-31 */
+ u8 _reserved1[48 - 32]; /* 32-47 */
+ u64 facilities; /* 48-55 */
+ u8 _reserved2[84 - 56]; /* 56-83 */
+ u8 fac84; /* 84 */
+ u8 _reserved3[91 - 85]; /* 85-90 */
+ u8 flags; /* 91 */
+ u8 _reserved4[100 - 92]; /* 92-99 */
+ u32 rnsize2; /* 100-103 */
+ u64 rnmax2; /* 104-111 */
+ u8 _reserved5[4096 - 112]; /* 112-4095 */
+} __attribute__((packed, aligned(PAGE_SIZE)));
+
+static struct read_info_sccb __initdata early_read_info_sccb;
+static int __initdata early_read_info_sccb_valid;
+
+u64 sclp_facilities;
+static u8 sclp_fac84;
+
+static int __init sclp_cmd_sync_early(sclp_cmdw_t cmd, void *sccb)
+{
+ int rc;
+
+ __ctl_set_bit(0, 9);
+ rc = sclp_service_call(cmd, sccb);
+ if (rc)
+ goto out;
+ __load_psw_mask(PSW_BASE_BITS | PSW_MASK_EXT |
+ PSW_MASK_WAIT | PSW_DEFAULT_KEY);
+ local_irq_disable();
+out:
+ /* Contents of the sccb might have changed. */
+ barrier();
+ __ctl_clear_bit(0, 9);
+ return rc;
+}
+
+void __init sclp_read_info_early(void)
+{
+ int rc;
+ int i;
+ struct read_info_sccb *sccb;
+ sclp_cmdw_t commands[] = {SCLP_CMDW_READ_SCP_INFO_FORCED,
+ SCLP_CMDW_READ_SCP_INFO};
+
+ sccb = &early_read_info_sccb;
+ for (i = 0; i < ARRAY_SIZE(commands); i++) {
+ do {
+ memset(sccb, 0, sizeof(*sccb));
+ sccb->header.length = sizeof(*sccb);
+ sccb->header.control_mask[2] = 0x80;
+ rc = sclp_cmd_sync_early(commands[i], sccb);
+ } while (rc == -EBUSY);
+
+ if (rc)
+ break;
+ if (sccb->header.response_code == 0x10) {
+ early_read_info_sccb_valid = 1;
+ break;
+ }
+ if (sccb->header.response_code != 0x1f0)
+ break;
+ }
+}
+
+void __init sclp_facilities_detect(void)
+{
+ if (!early_read_info_sccb_valid)
+ return;
+ sclp_facilities = early_read_info_sccb.facilities;
+ sclp_fac84 = early_read_info_sccb.fac84;
+}
+
+unsigned long long __init sclp_memory_detect(void)
+{
+ unsigned long long memsize;
+ struct read_info_sccb *sccb;
+
+ 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;
+}
+
+/*
+ * This function will be called after sclp_memory_detect(), which gets called
+ * early from early.c code. Therefore the sccb should have valid contents.
+ */
+void __init sclp_get_ipl_info(struct sclp_ipl_info *info)
+{
+ struct read_info_sccb *sccb;
+
+ if (!early_read_info_sccb_valid)
+ return;
+ sccb = &early_read_info_sccb;
+ info->is_valid = 1;
+ if (sccb->flags & 0x2)
+ info->has_dump = 1;
+ memcpy(&info->loadparm, &sccb->loadparm, LOADPARM_LEN);
+}
+
+static void sclp_sync_callback(struct sclp_req *req, void *data)
+{
+ struct completion *completion = data;
+
+ complete(completion);
+}
+
+static int do_sync_request(sclp_cmdw_t cmd, void *sccb)
+{
+ struct completion completion;
+ struct sclp_req *request;
+ int rc;
+
+ request = kzalloc(sizeof(*request), GFP_KERNEL);
+ if (!request)
+ return -ENOMEM;
+ request->command = cmd;
+ request->sccb = sccb;
+ request->status = SCLP_REQ_FILLED;
+ request->callback = sclp_sync_callback;
+ request->callback_data = &completion;
+ init_completion(&completion);
+
+ /* Perform sclp request. */
+ rc = sclp_add_request(request);
+ if (rc)
+ goto out;
+ wait_for_completion(&completion);
+
+ /* Check response. */
+ if (request->status != SCLP_REQ_DONE) {
+ printk(KERN_WARNING TAG "sync request failed "
+ "(cmd=0x%08x, status=0x%02x)\n", cmd, request->status);
+ rc = -EIO;
+ }
+out:
+ kfree(request);
+ return rc;
+}
+
+/*
+ * CPU configuration related functions.
+ */
+
+#define SCLP_CMDW_READ_CPU_INFO 0x00010001
+#define SCLP_CMDW_CONFIGURE_CPU 0x00110001
+#define SCLP_CMDW_DECONFIGURE_CPU 0x00100001
+
+struct read_cpu_info_sccb {
+ struct sccb_header header;
+ u16 nr_configured;
+ u16 offset_configured;
+ u16 nr_standby;
+ u16 offset_standby;
+ 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)
+{
+ char *page = (char *) sccb;
+
+ memset(info, 0, sizeof(*info));
+ info->configured = sccb->nr_configured;
+ info->standby = sccb->nr_standby;
+ info->combined = sccb->nr_configured + sccb->nr_standby;
+ info->has_cpu_type = sclp_fac84 & 0x1;
+ memcpy(&info->cpu, page + sccb->offset_configured,
+ info->combined * sizeof(struct sclp_cpu_entry));
+}
+
+void __init sclp_read_cpu_info_early(void)
+{
+ 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);
+ 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)
+ goto out;
+ if (sccb->header.response_code != 0x0010) {
+ printk(KERN_WARNING TAG "readcpuinfo failed "
+ "(response=0x%04x)\n", sccb->header.response_code);
+ rc = -EIO;
+ goto out;
+ }
+ sclp_fill_cpu_info(info, sccb);
+out:
+ free_page((unsigned long) sccb);
+ 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)));
+
+static int do_cpu_configure(sclp_cmdw_t cmd)
+{
+ struct cpu_configure_sccb *sccb;
+ int rc;
+
+ if (!SCLP_HAS_CPU_RECONFIG)
+ return -EOPNOTSUPP;
+ /*
+ * This is not going to cross a page boundary since we force
+ * kmalloc to have a minimum alignment of 8 bytes on s390.
+ */
+ sccb = kzalloc(sizeof(*sccb), 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:
+ break;
+ default:
+ printk(KERN_WARNING TAG "configure cpu failed (cmd=0x%08x, "
+ "response=0x%04x)\n", cmd, sccb->header.response_code);
+ rc = -EIO;
+ break;
+ }
+out:
+ kfree(sccb);
+ return rc;
+}
+
+int sclp_cpu_configure(u8 cpu)
+{
+ return do_cpu_configure(SCLP_CMDW_CONFIGURE_CPU | cpu << 8);
+}
+
+int sclp_cpu_deconfigure(u8 cpu)
+{
+ return do_cpu_configure(SCLP_CMDW_DECONFIGURE_CPU | cpu << 8);
+}
diff --git a/drivers/s390/char/sclp_info.c b/drivers/s390/char/sclp_info.c
deleted file mode 100644
index a1136e05275..00000000000
--- a/drivers/s390/char/sclp_info.c
+++ /dev/null
@@ -1,116 +0,0 @@
-/*
- * drivers/s390/char/sclp_info.c
- *
- * Copyright IBM Corp. 2007
- * Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
- */
-
-#include <linux/init.h>
-#include <linux/errno.h>
-#include <linux/string.h>
-#include <asm/sclp.h>
-#include "sclp.h"
-
-struct sclp_readinfo_sccb {
- struct sccb_header header; /* 0-7 */
- u16 rnmax; /* 8-9 */
- u8 rnsize; /* 10 */
- u8 _reserved0[24 - 11]; /* 11-23 */
- u8 loadparm[8]; /* 24-31 */
- u8 _reserved1[48 - 32]; /* 32-47 */
- u64 facilities; /* 48-55 */
- u8 _reserved2[91 - 56]; /* 56-90 */
- u8 flags; /* 91 */
- u8 _reserved3[100 - 92]; /* 92-99 */
- u32 rnsize2; /* 100-103 */
- u64 rnmax2; /* 104-111 */
- u8 _reserved4[4096 - 112]; /* 112-4095 */
-} __attribute__((packed, aligned(4096)));
-
-static struct sclp_readinfo_sccb __initdata early_readinfo_sccb;
-static int __initdata early_readinfo_sccb_valid;
-
-u64 sclp_facilities;
-
-void __init sclp_readinfo_early(void)
-{
- int ret;
- int i;
- struct sclp_readinfo_sccb *sccb;
- sclp_cmdw_t commands[] = {SCLP_CMDW_READ_SCP_INFO_FORCED,
- SCLP_CMDW_READ_SCP_INFO};
-
- /* Enable service signal subclass mask. */
- __ctl_set_bit(0, 9);
- sccb = &early_readinfo_sccb;
- for (i = 0; i < ARRAY_SIZE(commands); i++) {
- do {
- memset(sccb, 0, sizeof(*sccb));
- sccb->header.length = sizeof(*sccb);
- sccb->header.control_mask[2] = 0x80;
- ret = sclp_service_call(commands[i], sccb);
- } while (ret == -EBUSY);
-
- if (ret)
- break;
- __load_psw_mask(PSW_BASE_BITS | PSW_MASK_EXT |
- PSW_MASK_WAIT | PSW_DEFAULT_KEY);
- local_irq_disable();
- /*
- * Contents of the sccb might have changed
- * therefore a barrier is needed.
- */
- barrier();
- if (sccb->header.response_code == 0x10) {
- early_readinfo_sccb_valid = 1;
- break;
- }
- if (sccb->header.response_code != 0x1f0)
- break;
- }
- /* Disable service signal subclass mask again. */
- __ctl_clear_bit(0, 9);
-}
-
-void __init sclp_facilities_detect(void)
-{
- if (!early_readinfo_sccb_valid)
- return;
- sclp_facilities = early_readinfo_sccb.facilities;
-}
-
-unsigned long long __init sclp_memory_detect(void)
-{
- unsigned long long memsize;
- struct sclp_readinfo_sccb *sccb;
-
- if (!early_readinfo_sccb_valid)
- return 0;
- sccb = &early_readinfo_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;
-}
-
-/*
- * This function will be called after sclp_memory_detect(), which gets called
- * early from early.c code. Therefore the sccb should have valid contents.
- */
-void __init sclp_get_ipl_info(struct sclp_ipl_info *info)
-{
- struct sclp_readinfo_sccb *sccb;
-
- if (!early_readinfo_sccb_valid)
- return;
- sccb = &early_readinfo_sccb;
- info->is_valid = 1;
- if (sccb->flags & 0x2)
- info->has_dump = 1;
- memcpy(&info->loadparm, &sccb->loadparm, LOADPARM_LEN);
-}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-24 08:38:41 +0000