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s390/tty3270: add support for diag 8c
The current code uses diag210 to infer the 3270 geometry from the model number when running on z/VM. This doesn't work well as almost all 3270 software clients report as 3279-2 with a custom resolution. tty3270 assumes it has a 80x24 terminal connected because of the -2 suffix. Use diag 8c to fetch the realy geometry from z/VM. Note that this doesn't allow dynamic resizing, i.e. reconnecting to a z/VM session with a different geometry. Signed-off-by: Sven Schnelle <svens@linux.ibm.com> Acked-by: Heiko Carstens <hca@linux.ibm.com> Tested-by: Niklas Schnelle <schnelle@linux.ibm.com> Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
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@ -12,6 +12,7 @@
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#include <linux/if_ether.h>
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#include <linux/percpu.h>
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#include <asm/asm-extable.h>
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#include <asm/cio.h>
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enum diag_stat_enum {
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DIAG_STAT_X008,
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@ -20,6 +21,7 @@ enum diag_stat_enum {
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DIAG_STAT_X014,
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DIAG_STAT_X044,
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DIAG_STAT_X064,
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DIAG_STAT_X08C,
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DIAG_STAT_X09C,
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DIAG_STAT_X0DC,
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DIAG_STAT_X204,
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@ -83,6 +85,16 @@ struct diag210 {
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extern int diag210(struct diag210 *addr);
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struct diag8c {
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u8 flags;
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u8 num_partitions;
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u16 width;
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u16 height;
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u8 data[0];
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} __packed __aligned(4);
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extern int diag8c(struct diag8c *out, struct ccw_dev_id *devno);
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/* bit is set in flags, when physical cpu info is included in diag 204 data */
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#define DIAG204_LPAR_PHYS_FLG 0x80
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#define DIAG204_LPAR_NAME_LEN 8 /* lpar name len in diag 204 data */
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@ -318,6 +330,7 @@ struct diag_ops {
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int (*diag210)(struct diag210 *addr);
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int (*diag26c)(void *req, void *resp, enum diag26c_sc subcode);
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int (*diag14)(unsigned long rx, unsigned long ry1, unsigned long subcode);
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int (*diag8c)(struct diag8c *addr, struct ccw_dev_id *devno, size_t len);
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void (*diag0c)(struct hypfs_diag0c_entry *entry);
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void (*diag308_reset)(void);
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};
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@ -330,5 +343,6 @@ int _diag26c_amode31(void *req, void *resp, enum diag26c_sc subcode);
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int _diag14_amode31(unsigned long rx, unsigned long ry1, unsigned long subcode);
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void _diag0c_amode31(struct hypfs_diag0c_entry *entry);
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void _diag308_reset_amode31(void);
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int _diag8c_amode31(struct diag8c *addr, struct ccw_dev_id *devno, size_t len);
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#endif /* _ASM_S390_DIAG_H */
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@ -35,6 +35,7 @@ static const struct diag_desc diag_map[NR_DIAG_STAT] = {
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[DIAG_STAT_X014] = { .code = 0x014, .name = "Spool File Services" },
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[DIAG_STAT_X044] = { .code = 0x044, .name = "Voluntary Timeslice End" },
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[DIAG_STAT_X064] = { .code = 0x064, .name = "NSS Manipulation" },
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[DIAG_STAT_X08C] = { .code = 0x08c, .name = "Access 3270 Display Device Information" },
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[DIAG_STAT_X09C] = { .code = 0x09c, .name = "Relinquish Timeslice" },
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[DIAG_STAT_X0DC] = { .code = 0x0dc, .name = "Appldata Control" },
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[DIAG_STAT_X204] = { .code = 0x204, .name = "Logical-CPU Utilization" },
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@ -57,12 +58,16 @@ struct diag_ops __amode31_ref diag_amode31_ops = {
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.diag26c = _diag26c_amode31,
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.diag14 = _diag14_amode31,
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.diag0c = _diag0c_amode31,
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.diag8c = _diag8c_amode31,
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.diag308_reset = _diag308_reset_amode31
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};
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static struct diag210 _diag210_tmp_amode31 __section(".amode31.data");
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struct diag210 __amode31_ref *__diag210_tmp_amode31 = &_diag210_tmp_amode31;
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static struct diag8c _diag8c_tmp_amode31 __section(".amode31.data");
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struct diag8c __amode31_ref *__diag8c_tmp_amode31 = &_diag8c_tmp_amode31;
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static int show_diag_stat(struct seq_file *m, void *v)
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{
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struct diag_stat *stat;
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@ -194,6 +199,27 @@ int diag210(struct diag210 *addr)
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}
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EXPORT_SYMBOL(diag210);
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/*
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* Diagnose 210: Get information about a virtual device
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*/
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int diag8c(struct diag8c *addr, struct ccw_dev_id *devno)
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{
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static DEFINE_SPINLOCK(diag8c_lock);
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unsigned long flags;
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int ccode;
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spin_lock_irqsave(&diag8c_lock, flags);
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diag_stat_inc(DIAG_STAT_X08C);
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ccode = diag_amode31_ops.diag8c(__diag8c_tmp_amode31, devno, sizeof(*addr));
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*addr = *__diag8c_tmp_amode31;
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spin_unlock_irqrestore(&diag8c_lock, flags);
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return ccode;
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}
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EXPORT_SYMBOL(diag8c);
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int diag224(void *ptr)
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{
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int rc = -EOPNOTSUPP;
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@ -62,6 +62,19 @@ ENTRY(_diag210_amode31)
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EX_TABLE_AMODE31(.Ldiag210_ex, .Ldiag210_fault)
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ENDPROC(_diag210_amode31)
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/*
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* int diag8c(struct diag8c *addr, struct ccw_dev_id *devno, size_t len)
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*/
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ENTRY(_diag8c_amode31)
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llgf %r3,0(%r3)
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sam31
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diag %r2,%r4,0x8c
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.Ldiag8c_ex:
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sam64
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lgfr %r2,%r3
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BR_EX_AMODE31_r14
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EX_TABLE_AMODE31(.Ldiag8c_ex, .Ldiag8c_ex)
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ENDPROC(_diag8c_amode31)
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/*
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* int _diag26c_amode31(void *req, void *resp, enum diag26c_sc subcode)
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*/
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@ -421,8 +421,19 @@ raw3270_size_device_vm(struct raw3270 *rp)
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int rc, model;
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struct ccw_dev_id dev_id;
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struct diag210 diag_data;
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struct diag8c diag8c_data;
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ccw_device_get_id(rp->cdev, &dev_id);
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rc = diag8c(&diag8c_data, &dev_id);
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if (!rc) {
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rp->model = 2;
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rp->rows = diag8c_data.height;
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rp->cols = diag8c_data.width;
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if (diag8c_data.flags & 1)
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set_bit(RAW3270_FLAGS_14BITADDR, &rp->flags);
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return;
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}
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diag_data.vrdcdvno = dev_id.devno;
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diag_data.vrdclen = sizeof(struct diag210);
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rc = diag210(&diag_data);
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