The size is normally used to make a decision on when to stop the device (mainly when it's in a pre_copy state). Signed-off-by: Michał Winiarski --- drivers/gpu/drm/xe/xe_gt_sriov_pf_migration.c | 18 ++++++++++ drivers/gpu/drm/xe/xe_gt_sriov_pf_migration.h | 2 ++ drivers/gpu/drm/xe/xe_sriov_pf_debugfs.c | 34 +++++++++++++++++++ drivers/gpu/drm/xe/xe_sriov_pf_migration.c | 30 ++++++++++++++++ drivers/gpu/drm/xe/xe_sriov_pf_migration.h | 1 + 5 files changed, 85 insertions(+) diff --git a/drivers/gpu/drm/xe/xe_gt_sriov_pf_migration.c b/drivers/gpu/drm/xe/xe_gt_sriov_pf_migration.c index 582aaf062cbd4..50f09994e2854 100644 --- a/drivers/gpu/drm/xe/xe_gt_sriov_pf_migration.c +++ b/drivers/gpu/drm/xe/xe_gt_sriov_pf_migration.c @@ -395,6 +395,24 @@ ssize_t xe_gt_sriov_pf_migration_write_guc_state(struct xe_gt *gt, unsigned int } #endif /* CONFIG_DEBUG_FS */ +/** + * xe_gt_sriov_pf_migration_size() - Total size of migration data from all components within a GT + * @gt: the &struct xe_gt + * @vfid: the VF identifier + * + * This function is for PF only. + * + * Return: total migration data size in bytes or a negative error code on failure. + */ +ssize_t xe_gt_sriov_pf_migration_size(struct xe_gt *gt, unsigned int vfid) +{ + ssize_t total = 0; + + xe_gt_assert(gt, IS_SRIOV_PF(gt_to_xe(gt))); + + return total; +} + /** * xe_gt_sriov_pf_migration_ring_empty() - Check if a migration ring is empty * @gt: the &struct xe_gt diff --git a/drivers/gpu/drm/xe/xe_gt_sriov_pf_migration.h b/drivers/gpu/drm/xe/xe_gt_sriov_pf_migration.h index 1e4dc46413823..e5298d35d7d7e 100644 --- a/drivers/gpu/drm/xe/xe_gt_sriov_pf_migration.h +++ b/drivers/gpu/drm/xe/xe_gt_sriov_pf_migration.h @@ -15,6 +15,8 @@ int xe_gt_sriov_pf_migration_init(struct xe_gt *gt); int xe_gt_sriov_pf_migration_save_guc_state(struct xe_gt *gt, unsigned int vfid); int xe_gt_sriov_pf_migration_restore_guc_state(struct xe_gt *gt, unsigned int vfid); +ssize_t xe_gt_sriov_pf_migration_size(struct xe_gt *gt, unsigned int vfid); + bool xe_gt_sriov_pf_migration_ring_empty(struct xe_gt *gt, unsigned int vfid); int xe_gt_sriov_pf_migration_ring_produce(struct xe_gt *gt, unsigned int vfid, struct xe_sriov_pf_migration_data *data); diff --git a/drivers/gpu/drm/xe/xe_sriov_pf_debugfs.c b/drivers/gpu/drm/xe/xe_sriov_pf_debugfs.c index ce780719760a6..b06e893fe54cf 100644 --- a/drivers/gpu/drm/xe/xe_sriov_pf_debugfs.c +++ b/drivers/gpu/drm/xe/xe_sriov_pf_debugfs.c @@ -13,6 +13,7 @@ #include "xe_sriov_pf_control.h" #include "xe_sriov_pf_debugfs.h" #include "xe_sriov_pf_helpers.h" +#include "xe_sriov_pf_migration.h" #include "xe_sriov_pf_migration_data.h" #include "xe_sriov_pf_service.h" #include "xe_sriov_printk.h" @@ -203,6 +204,38 @@ static const struct file_operations data_vf_fops = { .llseek = default_llseek, }; +static ssize_t size_read(struct file *file, char __user *ubuf, size_t count, loff_t *ppos) +{ + struct dentry *dent = file_dentry(file); + struct dentry *vfdentry = dent->d_parent; + struct dentry *migration_dentry = vfdentry->d_parent; + unsigned int vfid = (uintptr_t)vfdentry->d_inode->i_private; + struct xe_device *xe = migration_dentry->d_inode->i_private; + char buf[21]; + ssize_t ret; + int len; + + xe_assert(xe, vfid); + xe_sriov_pf_assert_vfid(xe, vfid); + + xe_pm_runtime_get(xe); + ret = xe_sriov_pf_migration_size(xe, vfid); + xe_pm_runtime_put(xe); + if (ret < 0) + return ret; + + len = scnprintf(buf, sizeof(buf), "%zd\n", ret); + + return simple_read_from_buffer(ubuf, count, ppos, buf, len); +} + +static const struct file_operations size_vf_fops = { + .owner = THIS_MODULE, + .open = simple_open, + .read = size_read, + .llseek = default_llseek, +}; + static void pf_populate_vf(struct xe_device *xe, struct dentry *vfdent) { debugfs_create_file("pause", 0200, vfdent, xe, &pause_vf_fops); @@ -212,6 +245,7 @@ static void pf_populate_vf(struct xe_device *xe, struct dentry *vfdent) debugfs_create_file("save", 0600, vfdent, xe, &save_vf_fops); debugfs_create_file("restore", 0600, vfdent, xe, &restore_vf_fops); debugfs_create_file("migration_data", 0600, vfdent, xe, &data_vf_fops); + debugfs_create_file("migration_size", 0400, vfdent, xe, &size_vf_fops); } static void pf_populate_with_tiles(struct xe_device *xe, struct dentry *dent, unsigned int vfid) diff --git a/drivers/gpu/drm/xe/xe_sriov_pf_migration.c b/drivers/gpu/drm/xe/xe_sriov_pf_migration.c index a0cfac456ba0b..6b247581dec65 100644 --- a/drivers/gpu/drm/xe/xe_sriov_pf_migration.c +++ b/drivers/gpu/drm/xe/xe_sriov_pf_migration.c @@ -249,3 +249,33 @@ int xe_sriov_pf_migration_produce(struct xe_device *xe, unsigned int vfid, return xe_gt_sriov_pf_migration_ring_produce(gt, vfid, data); } + +/** + * xe_sriov_pf_migration_size() - Total size of migration data from all components within a device + * @xe: the &struct xe_device + * @vfid: the VF identifier + * + * This function is for PF only. + * + * Return: total migration data size in bytes or a negative error code on failure. + */ +ssize_t xe_sriov_pf_migration_size(struct xe_device *xe, unsigned int vfid) +{ + size_t size = 0; + struct xe_gt *gt; + ssize_t ret; + u8 gt_id; + + xe_assert(xe, IS_SRIOV_PF(xe)); + + for_each_gt(gt, xe, gt_id) { + ret = xe_gt_sriov_pf_migration_size(gt, vfid); + if (ret < 0) { + size = ret; + break; + } + size += ret; + } + + return size; +} diff --git a/drivers/gpu/drm/xe/xe_sriov_pf_migration.h b/drivers/gpu/drm/xe/xe_sriov_pf_migration.h index f2020ba19c2da..887ea3e9632bd 100644 --- a/drivers/gpu/drm/xe/xe_sriov_pf_migration.h +++ b/drivers/gpu/drm/xe/xe_sriov_pf_migration.h @@ -14,6 +14,7 @@ struct xe_device; #ifdef CONFIG_PCI_IOV int xe_sriov_pf_migration_init(struct xe_device *xe); bool xe_sriov_pf_migration_supported(struct xe_device *xe); +ssize_t xe_sriov_pf_migration_size(struct xe_device *xe, unsigned int vfid); struct xe_sriov_pf_migration_data * xe_sriov_pf_migration_consume(struct xe_device *xe, unsigned int vfid); int xe_sriov_pf_migration_produce(struct xe_device *xe, unsigned int vfid, -- 2.50.1