forked from luck/tmp_suning_uos_patched
[S390] cio: Channel-path configure function.
Add a new attribute to the channel-path sysfs directory through which channel-path configure operations can be triggered. Also listen for hardware events requesting channel-path configure operations and process them accordingly. Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
This commit is contained in:
Peter Oberparleiter
Martin Schwidefsky
parent
f5ba6c8636
commit
e5854a5839
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@ -3,7 +3,7 @@
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#
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obj-y += ctrlchar.o keyboard.o defkeymap.o sclp.o sclp_rw.o sclp_quiesce.o \
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sclp_info.o
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sclp_info.o sclp_chp.o
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obj-$(CONFIG_TN3270) += raw3270.o
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obj-$(CONFIG_TN3270_CONSOLE) += con3270.o
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196
drivers/s390/char/sclp_chp.c
Normal file
196
drivers/s390/char/sclp_chp.c
Normal file
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@ -0,0 +1,196 @@
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/*
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* drivers/s390/char/sclp_chp.c
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*
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* Copyright IBM Corp. 2007
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* Author(s): Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
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*/
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#include <linux/types.h>
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#include <linux/gfp.h>
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#include <linux/errno.h>
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#include <linux/completion.h>
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#include <asm/sclp.h>
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#include <asm/chpid.h>
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#include "sclp.h"
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#define TAG "sclp_chp: "
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#define SCLP_CMDW_CONFIGURE_CHANNEL_PATH 0x000f0001
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#define SCLP_CMDW_DECONFIGURE_CHANNEL_PATH 0x000e0001
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#define SCLP_CMDW_READ_CHANNEL_PATH_INFORMATION 0x00030001
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static inline sclp_cmdw_t get_configure_cmdw(struct chp_id chpid)
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{
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return SCLP_CMDW_CONFIGURE_CHANNEL_PATH | chpid.id << 8;
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}
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static inline sclp_cmdw_t get_deconfigure_cmdw(struct chp_id chpid)
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{
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return SCLP_CMDW_DECONFIGURE_CHANNEL_PATH | chpid.id << 8;
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}
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static void chp_callback(struct sclp_req *req, void *data)
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{
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struct completion *completion = data;
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complete(completion);
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}
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struct chp_cfg_sccb {
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struct sccb_header header;
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u8 ccm;
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u8 reserved[6];
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u8 cssid;
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} __attribute__((packed));
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struct chp_cfg_data {
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struct chp_cfg_sccb sccb;
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struct sclp_req req;
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struct completion completion;
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} __attribute__((packed));
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static int do_configure(sclp_cmdw_t cmd)
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{
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struct chp_cfg_data *data;
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int rc;
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/* Prepare sccb. */
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data = (struct chp_cfg_data *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
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if (!data)
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return -ENOMEM;
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data->sccb.header.length = sizeof(struct chp_cfg_sccb);
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data->req.command = cmd;
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data->req.sccb = &(data->sccb);
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data->req.status = SCLP_REQ_FILLED;
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data->req.callback = chp_callback;
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data->req.callback_data = &(data->completion);
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init_completion(&data->completion);
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/* Perform sclp request. */
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rc = sclp_add_request(&(data->req));
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if (rc)
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goto out;
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wait_for_completion(&data->completion);
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/* Check response .*/
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if (data->req.status != SCLP_REQ_DONE) {
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printk(KERN_WARNING TAG "configure channel-path request failed "
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"(status=0x%02x)\n", data->req.status);
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rc = -EIO;
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goto out;
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}
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switch (data->sccb.header.response_code) {
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case 0x0020:
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case 0x0120:
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case 0x0440:
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case 0x0450:
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break;
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default:
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printk(KERN_WARNING TAG "configure channel-path failed "
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"(cmd=0x%08x, response=0x%04x)\n", cmd,
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data->sccb.header.response_code);
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rc = -EIO;
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break;
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}
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out:
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free_page((unsigned long) data);
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return rc;
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}
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/**
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* sclp_chp_configure - perform configure channel-path sclp command
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* @chpid: channel-path ID
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*
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* Perform configure channel-path command sclp command for specified chpid.
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* Return 0 after command successfully finished, non-zero otherwise.
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*/
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int sclp_chp_configure(struct chp_id chpid)
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{
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return do_configure(get_configure_cmdw(chpid));
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}
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/**
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* sclp_chp_deconfigure - perform deconfigure channel-path sclp command
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* @chpid: channel-path ID
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*
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* Perform deconfigure channel-path command sclp command for specified chpid
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* and wait for completion. On success return 0. Return non-zero otherwise.
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*/
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int sclp_chp_deconfigure(struct chp_id chpid)
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{
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return do_configure(get_deconfigure_cmdw(chpid));
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}
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struct chp_info_sccb {
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struct sccb_header header;
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u8 recognized[SCLP_CHP_INFO_MASK_SIZE];
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u8 standby[SCLP_CHP_INFO_MASK_SIZE];
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u8 configured[SCLP_CHP_INFO_MASK_SIZE];
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u8 ccm;
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u8 reserved[6];
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u8 cssid;
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} __attribute__((packed));
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struct chp_info_data {
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struct chp_info_sccb sccb;
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struct sclp_req req;
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struct completion completion;
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} __attribute__((packed));
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/**
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* sclp_chp_read_info - perform read channel-path information sclp command
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* @info: resulting channel-path information data
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*
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* Perform read channel-path information sclp command and wait for completion.
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* On success, store channel-path information in @info and return 0. Return
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* non-zero otherwise.
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*/
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int sclp_chp_read_info(struct sclp_chp_info *info)
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{
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struct chp_info_data *data;
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int rc;
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/* Prepare sccb. */
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data = (struct chp_info_data *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
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if (!data)
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return -ENOMEM;
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data->sccb.header.length = sizeof(struct chp_info_sccb);
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data->req.command = SCLP_CMDW_READ_CHANNEL_PATH_INFORMATION;
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data->req.sccb = &(data->sccb);
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data->req.status = SCLP_REQ_FILLED;
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data->req.callback = chp_callback;
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data->req.callback_data = &(data->completion);
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init_completion(&data->completion);
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/* Perform sclp request. */
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rc = sclp_add_request(&(data->req));
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if (rc)
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goto out;
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wait_for_completion(&data->completion);
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/* Check response .*/
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if (data->req.status != SCLP_REQ_DONE) {
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printk(KERN_WARNING TAG "read channel-path info request failed "
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"(status=0x%02x)\n", data->req.status);
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rc = -EIO;
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goto out;
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}
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if (data->sccb.header.response_code != 0x0010) {
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printk(KERN_WARNING TAG "read channel-path info failed "
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"(response=0x%04x)\n", data->sccb.header.response_code);
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rc = -EIO;
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goto out;
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}
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memcpy(info->recognized, data->sccb.recognized,
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SCLP_CHP_INFO_MASK_SIZE);
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memcpy(info->standby, data->sccb.standby,
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SCLP_CHP_INFO_MASK_SIZE);
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memcpy(info->configured, data->sccb.configured,
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SCLP_CHP_INFO_MASK_SIZE);
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out:
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free_page((unsigned long) data);
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return rc;
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}
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@ -10,9 +10,14 @@
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#include <linux/bug.h>
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#include <linux/workqueue.h>
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#include <linux/spinlock.h>
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#include <linux/init.h>
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#include <linux/jiffies.h>
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#include <linux/wait.h>
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#include <linux/mutex.h>
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#include <asm/errno.h>
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#include <asm/chpid.h>
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#include <asm/sclp.h>
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#include "chpid.h"
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#include "cio.h"
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#include "css.h"
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#include "ioasm.h"
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@ -20,6 +25,32 @@
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#include "chp.h"
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#define to_channelpath(device) container_of(device, struct channel_path, dev)
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#define CHP_INFO_UPDATE_INTERVAL 1*HZ
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enum cfg_task_t {
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cfg_none,
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cfg_configure,
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cfg_deconfigure
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};
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/* Map for pending configure tasks. */
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static enum cfg_task_t chp_cfg_task[__MAX_CSSID + 1][__MAX_CHPID + 1];
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static DEFINE_MUTEX(cfg_lock);
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static int cfg_busy;
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/* Map for channel-path status. */
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static struct sclp_chp_info chp_info;
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static DEFINE_MUTEX(info_lock);
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/* Time after which channel-path status may be outdated. */
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static unsigned long chp_info_expires;
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/* Workqueue to perform pending configure tasks. */
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static struct workqueue_struct *chp_wq;
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static struct work_struct cfg_work;
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/* Wait queue for configure completion events. */
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static wait_queue_head_t cfg_wait_queue;
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/* Return channel_path struct for given chpid. */
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static inline struct channel_path *chpid_to_chp(struct chp_id chpid)
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@ -251,6 +282,43 @@ static ssize_t chp_status_write(struct device *dev,
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static DEVICE_ATTR(status, 0644, chp_status_show, chp_status_write);
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static ssize_t chp_configure_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct channel_path *cp;
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int status;
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cp = container_of(dev, struct channel_path, dev);
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status = chp_info_get_status(cp->chpid);
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if (status < 0)
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return status;
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return snprintf(buf, PAGE_SIZE, "%d\n", status);
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}
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static int cfg_wait_idle(void);
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static ssize_t chp_configure_write(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct channel_path *cp;
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int val;
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char delim;
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if (sscanf(buf, "%d %c", &val, &delim) != 1)
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return -EINVAL;
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if (val != 0 && val != 1)
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return -EINVAL;
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cp = container_of(dev, struct channel_path, dev);
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chp_cfg_schedule(cp->chpid, val);
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cfg_wait_idle();
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return count;
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}
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static DEVICE_ATTR(configure, 0644, chp_configure_show, chp_configure_write);
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static ssize_t chp_type_show(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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@ -293,6 +361,7 @@ static DEVICE_ATTR(shared, 0444, chp_shared_show, NULL);
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static struct attribute * chp_attrs[] = {
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&dev_attr_status.attr,
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&dev_attr_configure.attr,
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&dev_attr_type.attr,
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&dev_attr_cmg.attr,
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&dev_attr_shared.attr,
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@ -323,6 +392,8 @@ int chp_new(struct chp_id chpid)
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struct channel_path *chp;
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int ret;
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if (chp_is_registered(chpid))
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return 0;
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chp = kzalloc(sizeof(struct channel_path), GFP_KERNEL);
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if (!chp)
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return -ENOMEM;
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@ -435,3 +506,180 @@ int chp_process_crw(int id, int status)
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return 0;
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}
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}
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static inline int info_bit_num(struct chp_id id)
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{
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return id.id + id.cssid * (__MAX_CHPID + 1);
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}
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/* Force chp_info refresh on next call to info_validate(). */
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static void info_expire(void)
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{
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mutex_lock(&info_lock);
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chp_info_expires = jiffies - 1;
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mutex_unlock(&info_lock);
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}
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/* Ensure that chp_info is up-to-date. */
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static int info_update(void)
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{
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int rc;
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mutex_lock(&info_lock);
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rc = 0;
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if (time_after(jiffies, chp_info_expires)) {
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/* Data is too old, update. */
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rc = sclp_chp_read_info(&chp_info);
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chp_info_expires = jiffies + CHP_INFO_UPDATE_INTERVAL ;
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}
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mutex_unlock(&info_lock);
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return rc;
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}
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/**
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* chp_info_get_status - retrieve configure status of a channel-path
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* @chpid: channel-path ID
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*
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* On success, return 0 for standby, 1 for configured, 2 for reserved,
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* 3 for not recognized. Return negative error code on error.
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*/
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int chp_info_get_status(struct chp_id chpid)
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{
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int rc;
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int bit;
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rc = info_update();
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if (rc)
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return rc;
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bit = info_bit_num(chpid);
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mutex_lock(&info_lock);
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if (!chp_test_bit(chp_info.recognized, bit))
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rc = CHP_STATUS_NOT_RECOGNIZED;
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else if (chp_test_bit(chp_info.configured, bit))
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rc = CHP_STATUS_CONFIGURED;
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else if (chp_test_bit(chp_info.standby, bit))
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rc = CHP_STATUS_STANDBY;
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else
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rc = CHP_STATUS_RESERVED;
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mutex_unlock(&info_lock);
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return rc;
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}
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/* Return configure task for chpid. */
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static enum cfg_task_t cfg_get_task(struct chp_id chpid)
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{
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return chp_cfg_task[chpid.cssid][chpid.id];
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}
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/* Set configure task for chpid. */
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static void cfg_set_task(struct chp_id chpid, enum cfg_task_t cfg)
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{
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chp_cfg_task[chpid.cssid][chpid.id] = cfg;
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}
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/* Perform one configure/deconfigure request. Reschedule work function until
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* last request. */
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static void cfg_func(struct work_struct *work)
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{
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struct chp_id chpid;
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enum cfg_task_t t;
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mutex_lock(&cfg_lock);
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t = cfg_none;
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chp_id_for_each(&chpid) {
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t = cfg_get_task(chpid);
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if (t != cfg_none) {
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cfg_set_task(chpid, cfg_none);
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break;
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}
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}
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mutex_unlock(&cfg_lock);
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switch (t) {
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case cfg_configure:
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sclp_chp_configure(chpid);
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info_expire();
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chsc_chp_online(chpid);
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break;
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case cfg_deconfigure:
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sclp_chp_deconfigure(chpid);
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info_expire();
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chsc_chp_offline(chpid);
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break;
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case cfg_none:
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/* Get updated information after last change. */
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info_update();
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mutex_lock(&cfg_lock);
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cfg_busy = 0;
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mutex_unlock(&cfg_lock);
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wake_up_interruptible(&cfg_wait_queue);
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return;
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}
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queue_work(chp_wq, &cfg_work);
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}
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/**
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* chp_cfg_schedule - schedule chpid configuration request
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* @chpid - channel-path ID
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* @configure - Non-zero for configure, zero for deconfigure
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*
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* Schedule a channel-path configuration/deconfiguration request.
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*/
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void chp_cfg_schedule(struct chp_id chpid, int configure)
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{
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CIO_MSG_EVENT(2, "chp_cfg_sched%x.%02x=%d\n", chpid.cssid, chpid.id,
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configure);
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mutex_lock(&cfg_lock);
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cfg_set_task(chpid, configure ? cfg_configure : cfg_deconfigure);
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cfg_busy = 1;
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mutex_unlock(&cfg_lock);
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queue_work(chp_wq, &cfg_work);
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}
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/**
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* chp_cfg_cancel_deconfigure - cancel chpid deconfiguration request
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* @chpid - channel-path ID
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*
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* Cancel an active channel-path deconfiguration request if it has not yet
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* been performed.
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*/
|
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void chp_cfg_cancel_deconfigure(struct chp_id chpid)
|
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{
|
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CIO_MSG_EVENT(2, "chp_cfg_cancel:%x.%02x\n", chpid.cssid, chpid.id);
|
||||
mutex_lock(&cfg_lock);
|
||||
if (cfg_get_task(chpid) == cfg_deconfigure)
|
||||
cfg_set_task(chpid, cfg_none);
|
||||
mutex_unlock(&cfg_lock);
|
||||
}
|
||||
|
||||
static int cfg_wait_idle(void)
|
||||
{
|
||||
if (wait_event_interruptible(cfg_wait_queue, !cfg_busy))
|
||||
return -ERESTARTSYS;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int __init chp_init(void)
|
||||
{
|
||||
struct chp_id chpid;
|
||||
|
||||
chp_wq = create_singlethread_workqueue("cio_chp");
|
||||
if (!chp_wq)
|
||||
return -ENOMEM;
|
||||
INIT_WORK(&cfg_work, cfg_func);
|
||||
init_waitqueue_head(&cfg_wait_queue);
|
||||
if (info_update())
|
||||
return 0;
|
||||
/* Register available channel-paths. */
|
||||
chp_id_for_each(&chpid) {
|
||||
if (chp_info_get_status(chpid) != CHP_STATUS_NOT_RECOGNIZED)
|
||||
chp_new(chpid);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
subsys_initcall(chp_init);
|
||||
|
|
|
|||
|
|
@ -10,10 +10,23 @@
|
|||
|
||||
#include <linux/types.h>
|
||||
#include <linux/device.h>
|
||||
|
||||
#include "chpid.h"
|
||||
#include <asm/chpid.h>
|
||||
#include "chsc.h"
|
||||
|
||||
#define CHP_STATUS_STANDBY 0
|
||||
#define CHP_STATUS_CONFIGURED 1
|
||||
#define CHP_STATUS_RESERVED 2
|
||||
#define CHP_STATUS_NOT_RECOGNIZED 3
|
||||
|
||||
static inline int chp_test_bit(u8 *bitmap, int num)
|
||||
{
|
||||
int byte = num >> 3;
|
||||
int mask = 128 >> (num & 7);
|
||||
|
||||
return (bitmap[byte] & mask) ? 1 : 0;
|
||||
}
|
||||
|
||||
|
||||
struct channel_path {
|
||||
struct chp_id chpid;
|
||||
int state;
|
||||
|
|
@ -33,5 +46,8 @@ int chp_process_crw(int id, int available);
|
|||
void chp_remove_cmg_attr(struct channel_path *chp);
|
||||
int chp_add_cmg_attr(struct channel_path *chp);
|
||||
int chp_new(struct chp_id chpid);
|
||||
void chp_cfg_schedule(struct chp_id chpid, int configure);
|
||||
void chp_cfg_cancel_deconfigure(struct chp_id chpid);
|
||||
int chp_info_get_status(struct chp_id chpid);
|
||||
|
||||
#endif /* S390_CHP_H */
|
||||
|
|
|
|||
|
|
@ -15,12 +15,12 @@
|
|||
#include <linux/device.h>
|
||||
|
||||
#include <asm/cio.h>
|
||||
#include <asm/chpid.h>
|
||||
|
||||
#include "css.h"
|
||||
#include "cio.h"
|
||||
#include "cio_debug.h"
|
||||
#include "ioasm.h"
|
||||
#include "chpid.h"
|
||||
#include "chp.h"
|
||||
#include "chsc.h"
|
||||
|
||||
|
|
@ -498,6 +498,45 @@ static int chsc_process_sei_res_acc(struct chsc_sei_area *sei_area)
|
|||
return rc;
|
||||
}
|
||||
|
||||
struct chp_config_data {
|
||||
u8 map[32];
|
||||
u8 op;
|
||||
u8 pc;
|
||||
};
|
||||
|
||||
static int chsc_process_sei_chp_config(struct chsc_sei_area *sei_area)
|
||||
{
|
||||
struct chp_config_data *data;
|
||||
struct chp_id chpid;
|
||||
int num;
|
||||
|
||||
CIO_CRW_EVENT(4, "chsc: channel-path-configuration notification\n");
|
||||
if (sei_area->rs != 0)
|
||||
return 0;
|
||||
data = (struct chp_config_data *) &(sei_area->ccdf);
|
||||
chp_id_init(&chpid);
|
||||
for (num = 0; num <= __MAX_CHPID; num++) {
|
||||
if (!chp_test_bit(data->map, num))
|
||||
continue;
|
||||
chpid.id = num;
|
||||
printk(KERN_WARNING "cio: processing configure event %d for "
|
||||
"chpid %x.%02x\n", data->op, chpid.cssid, chpid.id);
|
||||
switch (data->op) {
|
||||
case 0:
|
||||
chp_cfg_schedule(chpid, 1);
|
||||
break;
|
||||
case 1:
|
||||
chp_cfg_schedule(chpid, 0);
|
||||
break;
|
||||
case 2:
|
||||
chp_cfg_cancel_deconfigure(chpid);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int chsc_process_sei(struct chsc_sei_area *sei_area)
|
||||
{
|
||||
int rc;
|
||||
|
|
@ -514,6 +553,9 @@ static int chsc_process_sei(struct chsc_sei_area *sei_area)
|
|||
case 2: /* i/o resource accessibiliy */
|
||||
rc = chsc_process_sei_res_acc(sei_area);
|
||||
break;
|
||||
case 8: /* channel-path-configuration notification */
|
||||
rc = chsc_process_sei_chp_config(sei_area);
|
||||
break;
|
||||
default: /* other stuff */
|
||||
CIO_CRW_EVENT(4, "chsc: unhandled sei content code %d\n",
|
||||
sei_area->cc);
|
||||
|
|
|
|||
|
|
@ -3,7 +3,7 @@
|
|||
|
||||
#include <linux/types.h>
|
||||
#include <linux/device.h>
|
||||
#include "chpid.h"
|
||||
#include <asm/chpid.h>
|
||||
|
||||
#define CHSC_SDA_OC_MSS 0x2
|
||||
|
||||
|
|
|
|||
|
|
@ -22,6 +22,7 @@
|
|||
#include <asm/setup.h>
|
||||
#include <asm/reset.h>
|
||||
#include <asm/ipl.h>
|
||||
#include <asm/chpid.h>
|
||||
#include "airq.h"
|
||||
#include "cio.h"
|
||||
#include "css.h"
|
||||
|
|
|
|||
|
|
@ -3,6 +3,7 @@
|
|||
|
||||
#include "schid.h"
|
||||
#include <linux/mutex.h>
|
||||
#include <linux/device.h>
|
||||
|
||||
/*
|
||||
* where we put the ssd info
|
||||
|
|
|
|||
|
|
@ -5,8 +5,10 @@
|
|||
#include <linux/wait.h>
|
||||
#include <linux/workqueue.h>
|
||||
#include <linux/device.h>
|
||||
#include <linux/types.h>
|
||||
|
||||
#include <asm/cio.h>
|
||||
#include <asm/chpid.h>
|
||||
|
||||
#include "schid.h"
|
||||
|
||||
|
|
@ -149,8 +151,6 @@ extern void css_reiterate_subchannels(void);
|
|||
|
||||
#define __MAX_SUBCHANNEL 65535
|
||||
#define __MAX_SSID 3
|
||||
#define __MAX_CHPID 255
|
||||
#define __MAX_CSSID 0
|
||||
|
||||
struct channel_subsystem {
|
||||
u8 cssid;
|
||||
|
|
|
|||
|
|
@ -15,6 +15,7 @@
|
|||
|
||||
#include <asm/ccwdev.h>
|
||||
#include <asm/cio.h>
|
||||
#include <asm/chpid.h>
|
||||
|
||||
#include "cio.h"
|
||||
#include "cio_debug.h"
|
||||
|
|
@ -22,7 +23,6 @@
|
|||
#include "device.h"
|
||||
#include "chsc.h"
|
||||
#include "ioasm.h"
|
||||
#include "chpid.h"
|
||||
#include "chp.h"
|
||||
|
||||
int
|
||||
|
|
|
|||
|
|
@ -16,13 +16,13 @@
|
|||
|
||||
#include <asm/ccwdev.h>
|
||||
#include <asm/idals.h>
|
||||
#include <asm/chpid.h>
|
||||
|
||||
#include "cio.h"
|
||||
#include "cio_debug.h"
|
||||
#include "css.h"
|
||||
#include "chsc.h"
|
||||
#include "device.h"
|
||||
#include "chpid.h"
|
||||
#include "chp.h"
|
||||
|
||||
int ccw_device_set_options_mask(struct ccw_device *cdev, unsigned long flags)
|
||||
|
|
|
|||
|
|
@ -1,8 +1,8 @@
|
|||
#ifndef S390_CIO_IOASM_H
|
||||
#define S390_CIO_IOASM_H
|
||||
|
||||
#include <asm/chpid.h>
|
||||
#include "schid.h"
|
||||
#include "chpid.h"
|
||||
|
||||
/*
|
||||
* TPI info structure
|
||||
|
|
|
|||
|
|
@ -5,12 +5,14 @@
|
|||
* Author(s): Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
|
||||
*/
|
||||
|
||||
#ifndef S390_CHP_ID_H
|
||||
#define S390_CHP_ID_H S390_CHP_ID_H
|
||||
#ifndef _ASM_S390_CHPID_H
|
||||
#define _ASM_S390_CHPID_H _ASM_S390_CHPID_H
|
||||
|
||||
#include <linux/string.h>
|
||||
#include <asm/types.h>
|
||||
#include "css.h"
|
||||
#include <asm/cio.h>
|
||||
|
||||
#define __MAX_CHPID 255
|
||||
|
||||
struct chp_id {
|
||||
u8 reserved1;
|
||||
|
|
@ -48,4 +50,4 @@ static inline int chp_id_is_valid(struct chp_id *chpid)
|
|||
#define chp_id_for_each(c) \
|
||||
for (chp_id_init(c); chp_id_is_valid(c); chp_id_next(c))
|
||||
|
||||
#endif /* S390_CHP_ID_H */
|
||||
#endif /* _ASM_S390_CHPID_H */
|
||||
|
|
@ -13,6 +13,7 @@
|
|||
#ifdef __KERNEL__
|
||||
|
||||
#define LPM_ANYPATH 0xff
|
||||
#define __MAX_CSSID 0
|
||||
|
||||
/*
|
||||
* subchannel status word
|
||||
|
|
|
|||
|
|
@ -9,6 +9,7 @@
|
|||
#define _ASM_S390_SCLP_H
|
||||
|
||||
#include <linux/types.h>
|
||||
#include <asm/chpid.h>
|
||||
|
||||
struct sccb_header {
|
||||
u16 length;
|
||||
|
|
@ -33,7 +34,18 @@ struct sclp_readinfo_sccb {
|
|||
u8 _reserved3[4096 - 112]; /* 112-4095 */
|
||||
} __attribute__((packed, aligned(4096)));
|
||||
|
||||
#define SCLP_CHP_INFO_MASK_SIZE 32
|
||||
|
||||
struct sclp_chp_info {
|
||||
u8 recognized[SCLP_CHP_INFO_MASK_SIZE];
|
||||
u8 standby[SCLP_CHP_INFO_MASK_SIZE];
|
||||
u8 configured[SCLP_CHP_INFO_MASK_SIZE];
|
||||
};
|
||||
|
||||
extern struct sclp_readinfo_sccb s390_readinfo_sccb;
|
||||
extern void sclp_readinfo_early(void);
|
||||
extern int sclp_chp_configure(struct chp_id chpid);
|
||||
extern int sclp_chp_deconfigure(struct chp_id chpid);
|
||||
extern int sclp_chp_read_info(struct sclp_chp_info *info);
|
||||
|
||||
#endif /* _ASM_S390_SCLP_H */
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user