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 <[email protected]> --- drivers/gpu/drm/xe/xe_gt_sriov_pf_migration.c | 19 ++++++++++++ drivers/gpu/drm/xe/xe_gt_sriov_pf_migration.h | 2 ++ drivers/gpu/drm/xe/xe_sriov_pf_debugfs.c | 29 ++++++++++++++++++ drivers/gpu/drm/xe/xe_sriov_pf_migration.c | 30 +++++++++++++++++++ drivers/gpu/drm/xe/xe_sriov_pf_migration.h | 1 + 5 files changed, 81 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 8ba72165759b3..4e26feb9c267f 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 +395,25 @@ 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 &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))); + + /* Nothing to query yet - will be updated once per-GT migration data types are added */ + return total; +} + /** * xe_gt_sriov_pf_migration_ring_empty() - Check if a migration ring is empty. * @gt: the &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 1ed2248f0a17e..e2d41750f863c 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); bool xe_gt_sriov_pf_migration_ring_full(struct xe_gt *gt, unsigned int vfid); void xe_gt_sriov_pf_migration_ring_free(struct xe_gt *gt, unsigned int vfid); diff --git a/drivers/gpu/drm/xe/xe_sriov_pf_debugfs.c b/drivers/gpu/drm/xe/xe_sriov_pf_debugfs.c index a9a28aec22421..bc2d0b0342f22 100644 --- a/drivers/gpu/drm/xe/xe_sriov_pf_debugfs.c +++ b/drivers/gpu/drm/xe/xe_sriov_pf_debugfs.c @@ -14,6 +14,7 @@ #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_provision.h" #include "xe_sriov_pf_service.h" #include "xe_sriov_printk.h" @@ -254,6 +255,33 @@ 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)->d_parent; + struct xe_device *xe = extract_xe(dent); + unsigned int vfid = extract_vfid(dent); + char buf[21]; + ssize_t ret; + int len; + + 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); @@ -263,6 +291,7 @@ 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 0b4b237780102..88babec9c893e 100644 --- a/drivers/gpu/drm/xe/xe_sriov_pf_migration.c +++ b/drivers/gpu/drm/xe/xe_sriov_pf_migration.c @@ -242,3 +242,33 @@ int xe_sriov_pf_migration_restore_produce(struct xe_device *xe, unsigned int vfi return xe_gt_sriov_pf_migration_restore_produce(gt, vfid, data); } + +/** + * xe_sriov_pf_migration_size() - Total size of migration data from all components within a device + * @xe: the &xe_device + * @vfid: the VF identifier (can't be 0) + * + * 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)); + xe_assert(xe, vfid); + + for_each_gt(gt, xe, gt_id) { + ret = xe_gt_sriov_pf_migration_size(gt, vfid); + if (ret < 0) + return ret; + + 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 df81a540c246a..16cb444c36aa6 100644 --- a/drivers/gpu/drm/xe/xe_sriov_pf_migration.h +++ b/drivers/gpu/drm/xe/xe_sriov_pf_migration.h @@ -18,6 +18,7 @@ int xe_sriov_pf_migration_restore_produce(struct xe_device *xe, unsigned int vfi struct xe_sriov_migration_data *data); struct xe_sriov_migration_data * xe_sriov_pf_migration_save_consume(struct xe_device *xe, unsigned int vfid); +ssize_t xe_sriov_pf_migration_size(struct xe_device *xe, unsigned int vfid); wait_queue_head_t *xe_sriov_pf_migration_waitqueue(struct xe_device *xe, unsigned int vfid); #endif -- 2.50.1
