2 * Copyright 2014 IBM Corp.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
10 #include <linux/kernel.h>
11 #include <linux/device.h>
12 #include <linux/sysfs.h>
13 #include <linux/pci_regs.h>
17 #define to_afu_chardev_m(d) dev_get_drvdata(d)
19 /********* Adapter attributes **********************************************/
21 static ssize_t
caia_version_show(struct device
*device
,
22 struct device_attribute
*attr
,
25 struct cxl
*adapter
= to_cxl_adapter(device
);
27 return scnprintf(buf
, PAGE_SIZE
, "%i.%i\n", adapter
->caia_major
,
31 static ssize_t
psl_revision_show(struct device
*device
,
32 struct device_attribute
*attr
,
35 struct cxl
*adapter
= to_cxl_adapter(device
);
37 return scnprintf(buf
, PAGE_SIZE
, "%i\n", adapter
->psl_rev
);
40 static ssize_t
base_image_show(struct device
*device
,
41 struct device_attribute
*attr
,
44 struct cxl
*adapter
= to_cxl_adapter(device
);
46 return scnprintf(buf
, PAGE_SIZE
, "%i\n", adapter
->base_image
);
49 static ssize_t
image_loaded_show(struct device
*device
,
50 struct device_attribute
*attr
,
53 struct cxl
*adapter
= to_cxl_adapter(device
);
55 if (adapter
->user_image_loaded
)
56 return scnprintf(buf
, PAGE_SIZE
, "user\n");
57 return scnprintf(buf
, PAGE_SIZE
, "factory\n");
60 static ssize_t
psl_timebase_synced_show(struct device
*device
,
61 struct device_attribute
*attr
,
64 struct cxl
*adapter
= to_cxl_adapter(device
);
67 /* Recompute the status only in native mode */
68 if (cpu_has_feature(CPU_FTR_HVMODE
)) {
69 psl_tb
= adapter
->native
->sl_ops
->timebase_read(adapter
);
70 delta
= abs(mftb() - psl_tb
);
72 /* CORE TB and PSL TB difference <= 16usecs ? */
73 adapter
->psl_timebase_synced
= (tb_to_ns(delta
) < 16000) ? true : false;
74 pr_devel("PSL timebase %s - delta: 0x%016llx\n",
75 (tb_to_ns(delta
) < 16000) ? "synchronized" :
76 "not synchronized", tb_to_ns(delta
));
78 return scnprintf(buf
, PAGE_SIZE
, "%i\n", adapter
->psl_timebase_synced
);
81 static ssize_t
tunneled_ops_supported_show(struct device
*device
,
82 struct device_attribute
*attr
,
85 struct cxl
*adapter
= to_cxl_adapter(device
);
87 return scnprintf(buf
, PAGE_SIZE
, "%i\n", adapter
->tunneled_ops_supported
);
90 static ssize_t
reset_adapter_store(struct device
*device
,
91 struct device_attribute
*attr
,
92 const char *buf
, size_t count
)
94 struct cxl
*adapter
= to_cxl_adapter(device
);
98 rc
= sscanf(buf
, "%i", &val
);
99 if ((rc
!= 1) || (val
!= 1 && val
!= -1))
103 * See if we can lock the context mapping that's only allowed
104 * when there are no contexts attached to the adapter. Once
105 * taken this will also prevent any context from getting activated.
108 rc
= cxl_adapter_context_lock(adapter
);
112 rc
= cxl_ops
->adapter_reset(adapter
);
113 /* In case reset failed release context lock */
115 cxl_adapter_context_unlock(adapter
);
117 } else if (val
== -1) {
118 /* Perform a forced adapter reset */
119 rc
= cxl_ops
->adapter_reset(adapter
);
123 return rc
? rc
: count
;
126 static ssize_t
load_image_on_perst_show(struct device
*device
,
127 struct device_attribute
*attr
,
130 struct cxl
*adapter
= to_cxl_adapter(device
);
132 if (!adapter
->perst_loads_image
)
133 return scnprintf(buf
, PAGE_SIZE
, "none\n");
135 if (adapter
->perst_select_user
)
136 return scnprintf(buf
, PAGE_SIZE
, "user\n");
137 return scnprintf(buf
, PAGE_SIZE
, "factory\n");
140 static ssize_t
load_image_on_perst_store(struct device
*device
,
141 struct device_attribute
*attr
,
142 const char *buf
, size_t count
)
144 struct cxl
*adapter
= to_cxl_adapter(device
);
147 if (!strncmp(buf
, "none", 4))
148 adapter
->perst_loads_image
= false;
149 else if (!strncmp(buf
, "user", 4)) {
150 adapter
->perst_select_user
= true;
151 adapter
->perst_loads_image
= true;
152 } else if (!strncmp(buf
, "factory", 7)) {
153 adapter
->perst_select_user
= false;
154 adapter
->perst_loads_image
= true;
158 if ((rc
= cxl_update_image_control(adapter
)))
164 static ssize_t
perst_reloads_same_image_show(struct device
*device
,
165 struct device_attribute
*attr
,
168 struct cxl
*adapter
= to_cxl_adapter(device
);
170 return scnprintf(buf
, PAGE_SIZE
, "%i\n", adapter
->perst_same_image
);
173 static ssize_t
perst_reloads_same_image_store(struct device
*device
,
174 struct device_attribute
*attr
,
175 const char *buf
, size_t count
)
177 struct cxl
*adapter
= to_cxl_adapter(device
);
181 rc
= sscanf(buf
, "%i", &val
);
182 if ((rc
!= 1) || !(val
== 1 || val
== 0))
185 adapter
->perst_same_image
= (val
== 1 ? true : false);
189 static struct device_attribute adapter_attrs
[] = {
190 __ATTR_RO(caia_version
),
191 __ATTR_RO(psl_revision
),
192 __ATTR_RO(base_image
),
193 __ATTR_RO(image_loaded
),
194 __ATTR_RO(psl_timebase_synced
),
195 __ATTR_RO(tunneled_ops_supported
),
196 __ATTR_RW(load_image_on_perst
),
197 __ATTR_RW(perst_reloads_same_image
),
198 __ATTR(reset
, S_IWUSR
, NULL
, reset_adapter_store
),
202 /********* AFU master specific attributes **********************************/
204 static ssize_t
mmio_size_show_master(struct device
*device
,
205 struct device_attribute
*attr
,
208 struct cxl_afu
*afu
= to_afu_chardev_m(device
);
210 return scnprintf(buf
, PAGE_SIZE
, "%llu\n", afu
->adapter
->ps_size
);
213 static ssize_t
pp_mmio_off_show(struct device
*device
,
214 struct device_attribute
*attr
,
217 struct cxl_afu
*afu
= to_afu_chardev_m(device
);
219 return scnprintf(buf
, PAGE_SIZE
, "%llu\n", afu
->native
->pp_offset
);
222 static ssize_t
pp_mmio_len_show(struct device
*device
,
223 struct device_attribute
*attr
,
226 struct cxl_afu
*afu
= to_afu_chardev_m(device
);
228 return scnprintf(buf
, PAGE_SIZE
, "%llu\n", afu
->pp_size
);
231 static struct device_attribute afu_master_attrs
[] = {
232 __ATTR(mmio_size
, S_IRUGO
, mmio_size_show_master
, NULL
),
233 __ATTR_RO(pp_mmio_off
),
234 __ATTR_RO(pp_mmio_len
),
238 /********* AFU attributes **************************************************/
240 static ssize_t
mmio_size_show(struct device
*device
,
241 struct device_attribute
*attr
,
244 struct cxl_afu
*afu
= to_cxl_afu(device
);
247 return scnprintf(buf
, PAGE_SIZE
, "%llu\n", afu
->pp_size
);
248 return scnprintf(buf
, PAGE_SIZE
, "%llu\n", afu
->adapter
->ps_size
);
251 static ssize_t
reset_store_afu(struct device
*device
,
252 struct device_attribute
*attr
,
253 const char *buf
, size_t count
)
255 struct cxl_afu
*afu
= to_cxl_afu(device
);
258 /* Not safe to reset if it is currently in use */
259 mutex_lock(&afu
->contexts_lock
);
260 if (!idr_is_empty(&afu
->contexts_idr
)) {
265 if ((rc
= cxl_ops
->afu_reset(afu
)))
270 mutex_unlock(&afu
->contexts_lock
);
274 static ssize_t
irqs_min_show(struct device
*device
,
275 struct device_attribute
*attr
,
278 struct cxl_afu
*afu
= to_cxl_afu(device
);
280 return scnprintf(buf
, PAGE_SIZE
, "%i\n", afu
->pp_irqs
);
283 static ssize_t
irqs_max_show(struct device
*device
,
284 struct device_attribute
*attr
,
287 struct cxl_afu
*afu
= to_cxl_afu(device
);
289 return scnprintf(buf
, PAGE_SIZE
, "%i\n", afu
->irqs_max
);
292 static ssize_t
irqs_max_store(struct device
*device
,
293 struct device_attribute
*attr
,
294 const char *buf
, size_t count
)
296 struct cxl_afu
*afu
= to_cxl_afu(device
);
300 ret
= sscanf(buf
, "%i", &irqs_max
);
304 if (irqs_max
< afu
->pp_irqs
)
307 if (cpu_has_feature(CPU_FTR_HVMODE
)) {
308 if (irqs_max
> afu
->adapter
->user_irqs
)
311 /* pHyp sets a per-AFU limit */
312 if (irqs_max
> afu
->guest
->max_ints
)
316 afu
->irqs_max
= irqs_max
;
320 static ssize_t
modes_supported_show(struct device
*device
,
321 struct device_attribute
*attr
, char *buf
)
323 struct cxl_afu
*afu
= to_cxl_afu(device
);
324 char *p
= buf
, *end
= buf
+ PAGE_SIZE
;
326 if (afu
->modes_supported
& CXL_MODE_DEDICATED
)
327 p
+= scnprintf(p
, end
- p
, "dedicated_process\n");
328 if (afu
->modes_supported
& CXL_MODE_DIRECTED
)
329 p
+= scnprintf(p
, end
- p
, "afu_directed\n");
333 static ssize_t
prefault_mode_show(struct device
*device
,
334 struct device_attribute
*attr
,
337 struct cxl_afu
*afu
= to_cxl_afu(device
);
339 switch (afu
->prefault_mode
) {
340 case CXL_PREFAULT_WED
:
341 return scnprintf(buf
, PAGE_SIZE
, "work_element_descriptor\n");
342 case CXL_PREFAULT_ALL
:
343 return scnprintf(buf
, PAGE_SIZE
, "all\n");
345 return scnprintf(buf
, PAGE_SIZE
, "none\n");
349 static ssize_t
prefault_mode_store(struct device
*device
,
350 struct device_attribute
*attr
,
351 const char *buf
, size_t count
)
353 struct cxl_afu
*afu
= to_cxl_afu(device
);
354 enum prefault_modes mode
= -1;
356 if (!strncmp(buf
, "work_element_descriptor", 23))
357 mode
= CXL_PREFAULT_WED
;
358 if (!strncmp(buf
, "all", 3))
359 mode
= CXL_PREFAULT_ALL
;
360 if (!strncmp(buf
, "none", 4))
361 mode
= CXL_PREFAULT_NONE
;
366 afu
->prefault_mode
= mode
;
370 static ssize_t
mode_show(struct device
*device
,
371 struct device_attribute
*attr
,
374 struct cxl_afu
*afu
= to_cxl_afu(device
);
376 if (afu
->current_mode
== CXL_MODE_DEDICATED
)
377 return scnprintf(buf
, PAGE_SIZE
, "dedicated_process\n");
378 if (afu
->current_mode
== CXL_MODE_DIRECTED
)
379 return scnprintf(buf
, PAGE_SIZE
, "afu_directed\n");
380 return scnprintf(buf
, PAGE_SIZE
, "none\n");
383 static ssize_t
mode_store(struct device
*device
, struct device_attribute
*attr
,
384 const char *buf
, size_t count
)
386 struct cxl_afu
*afu
= to_cxl_afu(device
);
387 int old_mode
, mode
= -1;
390 /* can't change this if we have a user */
391 mutex_lock(&afu
->contexts_lock
);
392 if (!idr_is_empty(&afu
->contexts_idr
))
395 if (!strncmp(buf
, "dedicated_process", 17))
396 mode
= CXL_MODE_DEDICATED
;
397 if (!strncmp(buf
, "afu_directed", 12))
398 mode
= CXL_MODE_DIRECTED
;
399 if (!strncmp(buf
, "none", 4))
408 * afu_deactivate_mode needs to be done outside the lock, prevent
409 * other contexts coming in before we are ready:
411 old_mode
= afu
->current_mode
;
412 afu
->current_mode
= 0;
415 mutex_unlock(&afu
->contexts_lock
);
417 if ((rc
= cxl_ops
->afu_deactivate_mode(afu
, old_mode
)))
419 if ((rc
= cxl_ops
->afu_activate_mode(afu
, mode
)))
424 mutex_unlock(&afu
->contexts_lock
);
428 static ssize_t
api_version_show(struct device
*device
,
429 struct device_attribute
*attr
,
432 return scnprintf(buf
, PAGE_SIZE
, "%i\n", CXL_API_VERSION
);
435 static ssize_t
api_version_compatible_show(struct device
*device
,
436 struct device_attribute
*attr
,
439 return scnprintf(buf
, PAGE_SIZE
, "%i\n", CXL_API_VERSION_COMPATIBLE
);
442 static ssize_t
afu_eb_read(struct file
*filp
, struct kobject
*kobj
,
443 struct bin_attribute
*bin_attr
, char *buf
,
444 loff_t off
, size_t count
)
446 struct cxl_afu
*afu
= to_cxl_afu(kobj_to_dev(kobj
));
448 return cxl_ops
->afu_read_err_buffer(afu
, buf
, off
, count
);
451 static struct device_attribute afu_attrs
[] = {
452 __ATTR_RO(mmio_size
),
455 __ATTR_RO(modes_supported
),
457 __ATTR_RW(prefault_mode
),
458 __ATTR_RO(api_version
),
459 __ATTR_RO(api_version_compatible
),
460 __ATTR(reset
, S_IWUSR
, NULL
, reset_store_afu
),
463 int cxl_sysfs_adapter_add(struct cxl
*adapter
)
465 struct device_attribute
*dev_attr
;
468 for (i
= 0; i
< ARRAY_SIZE(adapter_attrs
); i
++) {
469 dev_attr
= &adapter_attrs
[i
];
470 if (cxl_ops
->support_attributes(dev_attr
->attr
.name
,
471 CXL_ADAPTER_ATTRS
)) {
472 if ((rc
= device_create_file(&adapter
->dev
, dev_attr
)))
478 for (i
--; i
>= 0; i
--) {
479 dev_attr
= &adapter_attrs
[i
];
480 if (cxl_ops
->support_attributes(dev_attr
->attr
.name
,
482 device_remove_file(&adapter
->dev
, dev_attr
);
487 void cxl_sysfs_adapter_remove(struct cxl
*adapter
)
489 struct device_attribute
*dev_attr
;
492 for (i
= 0; i
< ARRAY_SIZE(adapter_attrs
); i
++) {
493 dev_attr
= &adapter_attrs
[i
];
494 if (cxl_ops
->support_attributes(dev_attr
->attr
.name
,
496 device_remove_file(&adapter
->dev
, dev_attr
);
500 struct afu_config_record
{
502 struct bin_attribute config_attr
;
503 struct list_head list
;
510 #define to_cr(obj) container_of(obj, struct afu_config_record, kobj)
512 static ssize_t
vendor_show(struct kobject
*kobj
,
513 struct kobj_attribute
*attr
, char *buf
)
515 struct afu_config_record
*cr
= to_cr(kobj
);
517 return scnprintf(buf
, PAGE_SIZE
, "0x%.4x\n", cr
->vendor
);
520 static ssize_t
device_show(struct kobject
*kobj
,
521 struct kobj_attribute
*attr
, char *buf
)
523 struct afu_config_record
*cr
= to_cr(kobj
);
525 return scnprintf(buf
, PAGE_SIZE
, "0x%.4x\n", cr
->device
);
528 static ssize_t
class_show(struct kobject
*kobj
,
529 struct kobj_attribute
*attr
, char *buf
)
531 struct afu_config_record
*cr
= to_cr(kobj
);
533 return scnprintf(buf
, PAGE_SIZE
, "0x%.6x\n", cr
->class);
536 static ssize_t
afu_read_config(struct file
*filp
, struct kobject
*kobj
,
537 struct bin_attribute
*bin_attr
, char *buf
,
538 loff_t off
, size_t count
)
540 struct afu_config_record
*cr
= to_cr(kobj
);
541 struct cxl_afu
*afu
= to_cxl_afu(kobj_to_dev(kobj
->parent
));
545 for (i
= 0; i
< count
;) {
546 rc
= cxl_ops
->afu_cr_read64(afu
, cr
->cr
, off
& ~0x7, &val
);
549 for (j
= off
& 0x7; j
< 8 && i
< count
; i
++, j
++, off
++)
550 buf
[i
] = (val
>> (j
* 8)) & 0xff;
556 static struct kobj_attribute vendor_attribute
=
558 static struct kobj_attribute device_attribute
=
560 static struct kobj_attribute class_attribute
=
563 static struct attribute
*afu_cr_attrs
[] = {
564 &vendor_attribute
.attr
,
565 &device_attribute
.attr
,
566 &class_attribute
.attr
,
570 static void release_afu_config_record(struct kobject
*kobj
)
572 struct afu_config_record
*cr
= to_cr(kobj
);
577 static struct kobj_type afu_config_record_type
= {
578 .sysfs_ops
= &kobj_sysfs_ops
,
579 .release
= release_afu_config_record
,
580 .default_attrs
= afu_cr_attrs
,
583 static struct afu_config_record
*cxl_sysfs_afu_new_cr(struct cxl_afu
*afu
, int cr_idx
)
585 struct afu_config_record
*cr
;
588 cr
= kzalloc(sizeof(struct afu_config_record
), GFP_KERNEL
);
590 return ERR_PTR(-ENOMEM
);
594 rc
= cxl_ops
->afu_cr_read16(afu
, cr_idx
, PCI_DEVICE_ID
, &cr
->device
);
597 rc
= cxl_ops
->afu_cr_read16(afu
, cr_idx
, PCI_VENDOR_ID
, &cr
->vendor
);
600 rc
= cxl_ops
->afu_cr_read32(afu
, cr_idx
, PCI_CLASS_REVISION
, &cr
->class);
606 * Export raw AFU PCIe like config record. For now this is read only by
607 * root - we can expand that later to be readable by non-root and maybe
608 * even writable provided we have a good use-case. Once we support
609 * exposing AFUs through a virtual PHB they will get that for free from
610 * Linux' PCI infrastructure, but until then it's not clear that we
611 * need it for anything since the main use case is just identifying
612 * AFUs, which can be done via the vendor, device and class attributes.
614 sysfs_bin_attr_init(&cr
->config_attr
);
615 cr
->config_attr
.attr
.name
= "config";
616 cr
->config_attr
.attr
.mode
= S_IRUSR
;
617 cr
->config_attr
.size
= afu
->crs_len
;
618 cr
->config_attr
.read
= afu_read_config
;
620 rc
= kobject_init_and_add(&cr
->kobj
, &afu_config_record_type
,
621 &afu
->dev
.kobj
, "cr%i", cr
->cr
);
625 rc
= sysfs_create_bin_file(&cr
->kobj
, &cr
->config_attr
);
629 rc
= kobject_uevent(&cr
->kobj
, KOBJ_ADD
);
635 sysfs_remove_bin_file(&cr
->kobj
, &cr
->config_attr
);
637 kobject_put(&cr
->kobj
);
644 void cxl_sysfs_afu_remove(struct cxl_afu
*afu
)
646 struct device_attribute
*dev_attr
;
647 struct afu_config_record
*cr
, *tmp
;
650 /* remove the err buffer bin attribute */
652 device_remove_bin_file(&afu
->dev
, &afu
->attr_eb
);
654 for (i
= 0; i
< ARRAY_SIZE(afu_attrs
); i
++) {
655 dev_attr
= &afu_attrs
[i
];
656 if (cxl_ops
->support_attributes(dev_attr
->attr
.name
,
658 device_remove_file(&afu
->dev
, &afu_attrs
[i
]);
661 list_for_each_entry_safe(cr
, tmp
, &afu
->crs
, list
) {
662 sysfs_remove_bin_file(&cr
->kobj
, &cr
->config_attr
);
663 kobject_put(&cr
->kobj
);
667 int cxl_sysfs_afu_add(struct cxl_afu
*afu
)
669 struct device_attribute
*dev_attr
;
670 struct afu_config_record
*cr
;
673 INIT_LIST_HEAD(&afu
->crs
);
675 for (i
= 0; i
< ARRAY_SIZE(afu_attrs
); i
++) {
676 dev_attr
= &afu_attrs
[i
];
677 if (cxl_ops
->support_attributes(dev_attr
->attr
.name
,
679 if ((rc
= device_create_file(&afu
->dev
, &afu_attrs
[i
])))
684 /* conditionally create the add the binary file for error info buffer */
686 sysfs_attr_init(&afu
->attr_eb
.attr
);
688 afu
->attr_eb
.attr
.name
= "afu_err_buff";
689 afu
->attr_eb
.attr
.mode
= S_IRUGO
;
690 afu
->attr_eb
.size
= afu
->eb_len
;
691 afu
->attr_eb
.read
= afu_eb_read
;
693 rc
= device_create_bin_file(&afu
->dev
, &afu
->attr_eb
);
696 "Unable to create eb attr for the afu. Err(%d)\n",
702 for (i
= 0; i
< afu
->crs_num
; i
++) {
703 cr
= cxl_sysfs_afu_new_cr(afu
, i
);
708 list_add(&cr
->list
, &afu
->crs
);
714 cxl_sysfs_afu_remove(afu
);
717 /* reset the eb_len as we havent created the bin attr */
720 for (i
--; i
>= 0; i
--) {
721 dev_attr
= &afu_attrs
[i
];
722 if (cxl_ops
->support_attributes(dev_attr
->attr
.name
,
724 device_remove_file(&afu
->dev
, &afu_attrs
[i
]);
729 int cxl_sysfs_afu_m_add(struct cxl_afu
*afu
)
731 struct device_attribute
*dev_attr
;
734 for (i
= 0; i
< ARRAY_SIZE(afu_master_attrs
); i
++) {
735 dev_attr
= &afu_master_attrs
[i
];
736 if (cxl_ops
->support_attributes(dev_attr
->attr
.name
,
737 CXL_AFU_MASTER_ATTRS
)) {
738 if ((rc
= device_create_file(afu
->chardev_m
, &afu_master_attrs
[i
])))
746 for (i
--; i
>= 0; i
--) {
747 dev_attr
= &afu_master_attrs
[i
];
748 if (cxl_ops
->support_attributes(dev_attr
->attr
.name
,
749 CXL_AFU_MASTER_ATTRS
))
750 device_remove_file(afu
->chardev_m
, &afu_master_attrs
[i
]);
755 void cxl_sysfs_afu_m_remove(struct cxl_afu
*afu
)
757 struct device_attribute
*dev_attr
;
760 for (i
= 0; i
< ARRAY_SIZE(afu_master_attrs
); i
++) {
761 dev_attr
= &afu_master_attrs
[i
];
762 if (cxl_ops
->support_attributes(dev_attr
->attr
.name
,
763 CXL_AFU_MASTER_ATTRS
))
764 device_remove_file(afu
->chardev_m
, &afu_master_attrs
[i
]);