diff options
| -rw-r--r-- | drivers/gpu/drm/xe/xe_configfs.c | 46 |
1 files changed, 42 insertions, 4 deletions
diff --git a/drivers/gpu/drm/xe/xe_configfs.c b/drivers/gpu/drm/xe/xe_configfs.c index 90bc5a4b5da7..640df5bee457 100644 --- a/drivers/gpu/drm/xe/xe_configfs.c +++ b/drivers/gpu/drm/xe/xe_configfs.c @@ -126,13 +126,21 @@ * not intended for normal execution and will taint the kernel with TAINT_TEST * when used. * - * Currently this is implemented only for post context restore. Examples: + * Currently this is implemented only for post and mid context restore. + * Examples: * - * #. Execute a LRI command to write 0xDEADBEEF to register 0x4f10:: + * #. Execute a LRI command to write 0xDEADBEEF to register 0x4f10 after the + * normal context restore:: * * # echo 'rcs cmd 11000001 4F100 DEADBEEF' \ * > /sys/kernel/config/xe/0000:03:00.0/ctx_restore_post_bb * + * #. Execute a LRI command to write 0xDEADBEEF to register 0x4f10 at the + * beginning of the context restore:: + * + * # echo 'rcs cmd 11000001 4F100 DEADBEEF' \ + * > /sys/kernel/config/xe/0000:03:00.0/ctx_restore_mid_bb + * #. Load certain values in a couple of registers (it can be used as a simpler * alternative to the `cmd`) action:: * @@ -146,7 +154,7 @@ * When using multiple lines, make sure to use a command that is * implemented with a single write syscall, like HEREDOC. * - * This attribute can only be set before binding to the device. + * These attributes can only be set before binding to the device. * * Remove devices * ============== @@ -168,6 +176,7 @@ struct xe_config_group_device { struct xe_config_device { u64 engines_allowed; struct wa_bb ctx_restore_post_bb[XE_ENGINE_CLASS_MAX]; + struct wa_bb ctx_restore_mid_bb[XE_ENGINE_CLASS_MAX]; bool survivability_mode; bool enable_psmi; } config; @@ -467,6 +476,13 @@ static ssize_t wa_bb_show(struct xe_config_group_device *dev, return p - data; } +static ssize_t ctx_restore_mid_bb_show(struct config_item *item, char *page) +{ + struct xe_config_group_device *dev = to_xe_config_group_device(item); + + return wa_bb_show(dev, dev->config.ctx_restore_mid_bb, page, SZ_4K); +} + static ssize_t ctx_restore_post_bb_show(struct config_item *item, char *page) { struct xe_config_group_device *dev = to_xe_config_group_device(item); @@ -623,6 +639,14 @@ static ssize_t wa_bb_store(struct wa_bb wa_bb[static XE_ENGINE_CLASS_MAX], return len; } +static ssize_t ctx_restore_mid_bb_store(struct config_item *item, + const char *data, size_t sz) +{ + struct xe_config_group_device *dev = to_xe_config_group_device(item); + + return wa_bb_store(dev->config.ctx_restore_mid_bb, dev, data, sz); +} + static ssize_t ctx_restore_post_bb_store(struct config_item *item, const char *data, size_t sz) { @@ -631,12 +655,14 @@ static ssize_t ctx_restore_post_bb_store(struct config_item *item, return wa_bb_store(dev->config.ctx_restore_post_bb, dev, data, sz); } +CONFIGFS_ATTR(, ctx_restore_mid_bb); CONFIGFS_ATTR(, ctx_restore_post_bb); CONFIGFS_ATTR(, enable_psmi); CONFIGFS_ATTR(, engines_allowed); CONFIGFS_ATTR(, survivability_mode); static struct configfs_attribute *xe_config_device_attrs[] = { + &attr_ctx_restore_mid_bb, &attr_ctx_restore_post_bb, &attr_enable_psmi, &attr_engines_allowed, @@ -909,7 +935,19 @@ u32 xe_configfs_get_ctx_restore_mid_bb(struct pci_dev *pdev, enum xe_engine_class class, const u32 **cs) { - return 0; + struct xe_config_group_device *dev = find_xe_config_group_device(pdev); + u32 len; + + if (!dev) + return 0; + + if (cs) + *cs = dev->config.ctx_restore_mid_bb[class].cs; + + len = dev->config.ctx_restore_mid_bb[class].len; + config_group_put(&dev->group); + + return len; } /** |