return >->sriov.pf.vfs[vfid].migration;
}
+static void pf_dump_mig_data(struct xe_gt *gt, unsigned int vfid,
+ struct xe_sriov_packet *data,
+ const char *what)
+{
+ if (IS_ENABLED(CONFIG_DRM_XE_DEBUG_SRIOV)) {
+ struct drm_printer p = xe_gt_dbg_printer(gt);
+
+ drm_printf(&p, "VF%u %s (%llu bytes)\n", vfid, what, data->hdr.size);
+ drm_print_hex_dump(&p, "mig_hdr: ", (void *)&data->hdr, sizeof(data->hdr));
+ drm_print_hex_dump(&p, "mig_data: ", data->vaddr, min(SZ_64, data->hdr.size));
+ }
+}
+
/* Return: number of dwords saved/restored/required or a negative error code on failure */
static int guc_action_vf_save_restore(struct xe_guc *guc, u32 vfid, u32 opcode,
u64 addr, u32 ndwords)
}
/* Return: size of the state in dwords or a negative error code on failure */
-static int pf_send_guc_query_vf_state_size(struct xe_gt *gt, unsigned int vfid)
+static int pf_send_guc_query_vf_mig_data_size(struct xe_gt *gt, unsigned int vfid)
{
int ret;
}
/* Return: number of state dwords saved or a negative error code on failure */
-static int pf_send_guc_save_vf_state(struct xe_gt *gt, unsigned int vfid,
- void *dst, size_t size)
+static int pf_send_guc_save_vf_mig_data(struct xe_gt *gt, unsigned int vfid,
+ void *dst, size_t size)
{
const int ndwords = size / sizeof(u32);
struct xe_guc *guc = >->uc.guc;
}
/* Return: number of state dwords restored or a negative error code on failure */
-static int pf_send_guc_restore_vf_state(struct xe_gt *gt, unsigned int vfid,
- const void *src, size_t size)
+static int pf_send_guc_restore_vf_mig_data(struct xe_gt *gt, unsigned int vfid,
+ const void *src, size_t size)
{
const int ndwords = size / sizeof(u32);
struct xe_guc *guc = >->uc.guc;
return xe_sriov_pf_migration_supported(gt_to_xe(gt));
}
-static struct mutex *pf_migration_mutex(struct xe_gt *gt)
+static int pf_save_vf_guc_mig_data(struct xe_gt *gt, unsigned int vfid)
{
- xe_gt_assert(gt, IS_SRIOV_PF(gt_to_xe(gt)));
- return >->sriov.pf.migration.snapshot_lock;
-}
-
-static struct xe_gt_sriov_state_snapshot *pf_pick_vf_snapshot(struct xe_gt *gt,
- unsigned int vfid)
-{
- xe_gt_assert(gt, IS_SRIOV_PF(gt_to_xe(gt)));
- xe_gt_assert(gt, vfid <= xe_sriov_pf_get_totalvfs(gt_to_xe(gt)));
- lockdep_assert_held(pf_migration_mutex(gt));
-
- return >->sriov.pf.vfs[vfid].snapshot;
-}
-
-static unsigned int pf_snapshot_index(struct xe_gt *gt, struct xe_gt_sriov_state_snapshot *snapshot)
-{
- return container_of(snapshot, struct xe_gt_sriov_metadata, snapshot) - gt->sriov.pf.vfs;
-}
-
-static void pf_free_guc_state(struct xe_gt *gt, struct xe_gt_sriov_state_snapshot *snapshot)
-{
- struct xe_device *xe = gt_to_xe(gt);
-
- drmm_kfree(&xe->drm, snapshot->guc.buff);
- snapshot->guc.buff = NULL;
- snapshot->guc.size = 0;
-}
-
-static int pf_alloc_guc_state(struct xe_gt *gt,
- struct xe_gt_sriov_state_snapshot *snapshot,
- size_t size)
-{
- struct xe_device *xe = gt_to_xe(gt);
- void *p;
-
- pf_free_guc_state(gt, snapshot);
-
- if (!size)
- return -ENODATA;
-
- if (size % sizeof(u32))
- return -EINVAL;
-
- if (size > SZ_2M)
- return -EFBIG;
-
- p = drmm_kzalloc(&xe->drm, size, GFP_KERNEL);
- if (!p)
- return -ENOMEM;
-
- snapshot->guc.buff = p;
- snapshot->guc.size = size;
- return 0;
-}
-
-static void pf_dump_guc_state(struct xe_gt *gt, struct xe_gt_sriov_state_snapshot *snapshot)
-{
- if (IS_ENABLED(CONFIG_DRM_XE_DEBUG_SRIOV)) {
- unsigned int vfid __maybe_unused = pf_snapshot_index(gt, snapshot);
-
- xe_gt_sriov_dbg_verbose(gt, "VF%u GuC state is %zu dwords:\n",
- vfid, snapshot->guc.size / sizeof(u32));
- print_hex_dump_bytes("state: ", DUMP_PREFIX_OFFSET,
- snapshot->guc.buff, min(SZ_64, snapshot->guc.size));
- }
-}
-
-static int pf_save_vf_guc_state(struct xe_gt *gt, unsigned int vfid)
-{
- struct xe_gt_sriov_state_snapshot *snapshot = pf_pick_vf_snapshot(gt, vfid);
+ struct xe_sriov_packet *data;
size_t size;
int ret;
- ret = pf_send_guc_query_vf_state_size(gt, vfid);
+ ret = pf_send_guc_query_vf_mig_data_size(gt, vfid);
if (ret < 0)
goto fail;
+
size = ret * sizeof(u32);
- xe_gt_sriov_dbg_verbose(gt, "VF%u state size is %d dwords (%zu bytes)\n", vfid, ret, size);
- ret = pf_alloc_guc_state(gt, snapshot, size);
- if (ret < 0)
+ data = xe_sriov_packet_alloc(gt_to_xe(gt));
+ if (!data) {
+ ret = -ENOMEM;
goto fail;
+ }
+
+ ret = xe_sriov_packet_init(data, gt->tile->id, gt->info.id,
+ XE_SRIOV_PACKET_TYPE_GUC, 0, size);
+ if (ret)
+ goto fail_free;
- ret = pf_send_guc_save_vf_state(gt, vfid, snapshot->guc.buff, size);
+ ret = pf_send_guc_save_vf_mig_data(gt, vfid, data->vaddr, size);
if (ret < 0)
- goto fail;
+ goto fail_free;
size = ret * sizeof(u32);
xe_gt_assert(gt, size);
- xe_gt_assert(gt, size <= snapshot->guc.size);
- snapshot->guc.size = size;
+ xe_gt_assert(gt, size <= data->hdr.size);
+ data->hdr.size = size;
+ data->remaining = size;
+
+ pf_dump_mig_data(gt, vfid, data, "GuC data save");
+
+ ret = xe_gt_sriov_pf_migration_save_produce(gt, vfid, data);
+ if (ret)
+ goto fail_free;
- pf_dump_guc_state(gt, snapshot);
return 0;
+fail_free:
+ xe_sriov_packet_free(data);
fail:
- xe_gt_sriov_dbg(gt, "Unable to save VF%u state (%pe)\n", vfid, ERR_PTR(ret));
- pf_free_guc_state(gt, snapshot);
+ xe_gt_sriov_err(gt, "Failed to save VF%u GuC data (%pe)\n",
+ vfid, ERR_PTR(ret));
return ret;
}
/**
- * xe_gt_sriov_pf_migration_save_guc_state() - Take a GuC VF state snapshot.
+ * xe_gt_sriov_pf_migration_guc_size() - Get the size of VF GuC migration data.
* @gt: the &xe_gt
* @vfid: the VF identifier
*
* This function is for PF only.
*
- * Return: 0 on success or a negative error code on failure.
+ * Return: size in bytes or a negative error code on failure.
*/
-int xe_gt_sriov_pf_migration_save_guc_state(struct xe_gt *gt, unsigned int vfid)
+ssize_t xe_gt_sriov_pf_migration_guc_size(struct xe_gt *gt, unsigned int vfid)
{
- int err;
+ ssize_t size;
xe_gt_assert(gt, IS_SRIOV_PF(gt_to_xe(gt)));
xe_gt_assert(gt, vfid != PFID);
if (!pf_migration_supported(gt))
return -ENOPKG;
- mutex_lock(pf_migration_mutex(gt));
- err = pf_save_vf_guc_state(gt, vfid);
- mutex_unlock(pf_migration_mutex(gt));
+ size = pf_send_guc_query_vf_mig_data_size(gt, vfid);
+ if (size >= 0)
+ size *= sizeof(u32);
- return err;
-}
-
-static int pf_restore_vf_guc_state(struct xe_gt *gt, unsigned int vfid)
-{
- struct xe_gt_sriov_state_snapshot *snapshot = pf_pick_vf_snapshot(gt, vfid);
- int ret;
-
- if (!snapshot->guc.size)
- return -ENODATA;
-
- xe_gt_sriov_dbg_verbose(gt, "restoring %zu dwords of VF%u GuC state\n",
- snapshot->guc.size / sizeof(u32), vfid);
- ret = pf_send_guc_restore_vf_state(gt, vfid, snapshot->guc.buff, snapshot->guc.size);
- if (ret < 0)
- goto fail;
-
- xe_gt_sriov_dbg_verbose(gt, "restored %d dwords of VF%u GuC state\n", ret, vfid);
- return 0;
-
-fail:
- xe_gt_sriov_dbg(gt, "Failed to restore VF%u GuC state (%pe)\n", vfid, ERR_PTR(ret));
- return ret;
+ return size;
}
/**
- * xe_gt_sriov_pf_migration_restore_guc_state() - Restore a GuC VF state.
+ * xe_gt_sriov_pf_migration_guc_save() - Save VF GuC migration data.
* @gt: the &xe_gt
* @vfid: the VF identifier
*
*
* Return: 0 on success or a negative error code on failure.
*/
-int xe_gt_sriov_pf_migration_restore_guc_state(struct xe_gt *gt, unsigned int vfid)
+int xe_gt_sriov_pf_migration_guc_save(struct xe_gt *gt, unsigned int vfid)
{
- int ret;
-
xe_gt_assert(gt, IS_SRIOV_PF(gt_to_xe(gt)));
xe_gt_assert(gt, vfid != PFID);
xe_gt_assert(gt, vfid <= xe_sriov_pf_get_totalvfs(gt_to_xe(gt)));
if (!pf_migration_supported(gt))
return -ENOPKG;
- mutex_lock(pf_migration_mutex(gt));
- ret = pf_restore_vf_guc_state(gt, vfid);
- mutex_unlock(pf_migration_mutex(gt));
-
- return ret;
+ return pf_save_vf_guc_mig_data(gt, vfid);
}
-#ifdef CONFIG_DEBUG_FS
-/**
- * xe_gt_sriov_pf_migration_read_guc_state() - Read a GuC VF state.
- * @gt: the &xe_gt
- * @vfid: the VF identifier
- * @buf: the user space buffer to read to
- * @count: the maximum number of bytes to read
- * @pos: the current position in the buffer
- *
- * This function is for PF only.
- *
- * This function reads up to @count bytes from the saved VF GuC state buffer
- * at offset @pos into the user space address starting at @buf.
- *
- * Return: the number of bytes read or a negative error code on failure.
- */
-ssize_t xe_gt_sriov_pf_migration_read_guc_state(struct xe_gt *gt, unsigned int vfid,
- char __user *buf, size_t count, loff_t *pos)
+static int pf_restore_vf_guc_state(struct xe_gt *gt, unsigned int vfid,
+ struct xe_sriov_packet *data)
{
- struct xe_gt_sriov_state_snapshot *snapshot;
- ssize_t ret;
+ int ret;
- xe_gt_assert(gt, IS_SRIOV_PF(gt_to_xe(gt)));
- xe_gt_assert(gt, vfid != PFID);
- xe_gt_assert(gt, vfid <= xe_sriov_pf_get_totalvfs(gt_to_xe(gt)));
+ xe_gt_assert(gt, data->hdr.size);
- if (!pf_migration_supported(gt))
- return -ENOPKG;
+ pf_dump_mig_data(gt, vfid, data, "GuC data restore");
- mutex_lock(pf_migration_mutex(gt));
- snapshot = pf_pick_vf_snapshot(gt, vfid);
- if (snapshot->guc.size)
- ret = simple_read_from_buffer(buf, count, pos, snapshot->guc.buff,
- snapshot->guc.size);
- else
- ret = -ENODATA;
- mutex_unlock(pf_migration_mutex(gt));
+ ret = pf_send_guc_restore_vf_mig_data(gt, vfid, data->vaddr, data->hdr.size);
+ if (ret < 0)
+ goto fail;
+
+ return 0;
+fail:
+ xe_gt_sriov_err(gt, "Failed to restore VF%u GuC data (%pe)\n",
+ vfid, ERR_PTR(ret));
return ret;
}
/**
- * xe_gt_sriov_pf_migration_write_guc_state() - Write a GuC VF state.
+ * xe_gt_sriov_pf_migration_guc_restore() - Restore VF GuC migration data.
* @gt: the &xe_gt
* @vfid: the VF identifier
- * @buf: the user space buffer with GuC VF state
- * @size: the size of GuC VF state (in bytes)
+ * @data: the &xe_sriov_packet containing migration data
*
* This function is for PF only.
*
- * This function reads @size bytes of the VF GuC state stored at user space
- * address @buf and writes it into a internal VF state buffer.
- *
- * Return: the number of bytes used or a negative error code on failure.
+ * Return: 0 on success or a negative error code on failure.
*/
-ssize_t xe_gt_sriov_pf_migration_write_guc_state(struct xe_gt *gt, unsigned int vfid,
- const char __user *buf, size_t size)
+int xe_gt_sriov_pf_migration_guc_restore(struct xe_gt *gt, unsigned int vfid,
+ struct xe_sriov_packet *data)
{
- struct xe_gt_sriov_state_snapshot *snapshot;
- loff_t pos = 0;
- ssize_t ret;
-
xe_gt_assert(gt, IS_SRIOV_PF(gt_to_xe(gt)));
xe_gt_assert(gt, vfid != PFID);
xe_gt_assert(gt, vfid <= xe_sriov_pf_get_totalvfs(gt_to_xe(gt)));
if (!pf_migration_supported(gt))
return -ENOPKG;
- mutex_lock(pf_migration_mutex(gt));
- snapshot = pf_pick_vf_snapshot(gt, vfid);
- ret = pf_alloc_guc_state(gt, snapshot, size);
- if (!ret) {
- ret = simple_write_to_buffer(snapshot->guc.buff, size, &pos, buf, size);
- if (ret < 0)
- pf_free_guc_state(gt, snapshot);
- else
- pf_dump_guc_state(gt, snapshot);
- }
- mutex_unlock(pf_migration_mutex(gt));
-
- return ret;
+ return pf_restore_vf_guc_state(gt, vfid, data);
}
-#endif /* CONFIG_DEBUG_FS */
/**
* xe_gt_sriov_pf_migration_size() - Total size of migration data from all components within a GT.
if (!pf_migration_supported(gt))
return 0;
- err = drmm_mutex_init(&xe->drm, >->sriov.pf.migration.snapshot_lock);
- if (err)
- return err;
-
totalvfs = xe_sriov_pf_get_totalvfs(xe);
for (n = 1; n <= totalvfs; n++) {
struct xe_gt_sriov_migration_data *migration = pf_pick_gt_migration(gt, n);
projects / thirdparty / kernel / linux.git / commitdiff
