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path: root/drivers/vfio/pci/mlx5/cmd.c
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Diffstat (limited to 'drivers/vfio/pci/mlx5/cmd.c')
-rw-r--r--drivers/vfio/pci/mlx5/cmd.c103
1 files changed, 76 insertions, 27 deletions
diff --git a/drivers/vfio/pci/mlx5/cmd.c b/drivers/vfio/pci/mlx5/cmd.c
index 33574b0447..efd1d252cd 100644
--- a/drivers/vfio/pci/mlx5/cmd.c
+++ b/drivers/vfio/pci/mlx5/cmd.c
@@ -86,7 +86,8 @@ int mlx5vf_cmd_resume_vhca(struct mlx5vf_pci_core_device *mvdev, u16 op_mod)
}
int mlx5vf_cmd_query_vhca_migration_state(struct mlx5vf_pci_core_device *mvdev,
- size_t *state_size, u8 query_flags)
+ size_t *state_size, u64 *total_size,
+ u8 query_flags)
{
u32 out[MLX5_ST_SZ_DW(query_vhca_migration_state_out)] = {};
u32 in[MLX5_ST_SZ_DW(query_vhca_migration_state_in)] = {};
@@ -128,6 +129,7 @@ int mlx5vf_cmd_query_vhca_migration_state(struct mlx5vf_pci_core_device *mvdev,
MLX5_SET(query_vhca_migration_state_in, in, op_mod, 0);
MLX5_SET(query_vhca_migration_state_in, in, incremental,
query_flags & MLX5VF_QUERY_INC);
+ MLX5_SET(query_vhca_migration_state_in, in, chunk, mvdev->chunk_mode);
ret = mlx5_cmd_exec_inout(mvdev->mdev, query_vhca_migration_state, in,
out);
@@ -139,6 +141,11 @@ int mlx5vf_cmd_query_vhca_migration_state(struct mlx5vf_pci_core_device *mvdev,
*state_size = MLX5_GET(query_vhca_migration_state_out, out,
required_umem_size);
+ if (total_size)
+ *total_size = mvdev->chunk_mode ?
+ MLX5_GET64(query_vhca_migration_state_out, out,
+ remaining_total_size) : *state_size;
+
return 0;
}
@@ -254,6 +261,9 @@ void mlx5vf_cmd_set_migratable(struct mlx5vf_pci_core_device *mvdev,
mvdev->core_device.vdev.migration_flags |=
VFIO_MIGRATION_PRE_COPY;
+ if (MLX5_CAP_GEN_2(mvdev->mdev, migration_in_chunks))
+ mvdev->chunk_mode = 1;
+
end:
mlx5_vf_put_core_dev(mvdev->mdev);
}
@@ -428,6 +438,7 @@ end:
void mlx5vf_put_data_buffer(struct mlx5_vhca_data_buffer *buf)
{
spin_lock_irq(&buf->migf->list_lock);
+ buf->stop_copy_chunk_num = 0;
list_add_tail(&buf->buf_elm, &buf->migf->avail_list);
spin_unlock_irq(&buf->migf->list_lock);
}
@@ -475,6 +486,15 @@ found:
return buf;
}
+static void
+mlx5vf_save_callback_complete(struct mlx5_vf_migration_file *migf,
+ struct mlx5vf_async_data *async_data)
+{
+ kvfree(async_data->out);
+ complete(&migf->save_comp);
+ fput(migf->filp);
+}
+
void mlx5vf_mig_file_cleanup_cb(struct work_struct *_work)
{
struct mlx5vf_async_data *async_data = container_of(_work,
@@ -487,16 +507,15 @@ void mlx5vf_mig_file_cleanup_cb(struct work_struct *_work)
mlx5vf_put_data_buffer(async_data->buf);
if (async_data->header_buf)
mlx5vf_put_data_buffer(async_data->header_buf);
- if (async_data->status == MLX5_CMD_STAT_BAD_RES_STATE_ERR)
+ if (!async_data->stop_copy_chunk &&
+ async_data->status == MLX5_CMD_STAT_BAD_RES_STATE_ERR)
migf->state = MLX5_MIGF_STATE_PRE_COPY_ERROR;
else
migf->state = MLX5_MIGF_STATE_ERROR;
wake_up_interruptible(&migf->poll_wait);
}
mutex_unlock(&migf->lock);
- kvfree(async_data->out);
- complete(&migf->save_comp);
- fput(migf->filp);
+ mlx5vf_save_callback_complete(migf, async_data);
}
static int add_buf_header(struct mlx5_vhca_data_buffer *header_buf,
@@ -536,13 +555,20 @@ static void mlx5vf_save_callback(int status, struct mlx5_async_work *context)
struct mlx5_vf_migration_file, async_data);
if (!status) {
+ size_t next_required_umem_size = 0;
+ bool stop_copy_last_chunk;
size_t image_size;
unsigned long flags;
bool initial_pre_copy = migf->state != MLX5_MIGF_STATE_PRE_COPY &&
- !async_data->last_chunk;
+ !async_data->stop_copy_chunk;
image_size = MLX5_GET(save_vhca_state_out, async_data->out,
actual_image_size);
+ if (async_data->buf->stop_copy_chunk_num)
+ next_required_umem_size = MLX5_GET(save_vhca_state_out,
+ async_data->out, next_required_umem_size);
+ stop_copy_last_chunk = async_data->stop_copy_chunk &&
+ !next_required_umem_size;
if (async_data->header_buf) {
status = add_buf_header(async_data->header_buf, image_size,
initial_pre_copy);
@@ -554,19 +580,34 @@ static void mlx5vf_save_callback(int status, struct mlx5_async_work *context)
migf->max_pos += async_data->buf->length;
spin_lock_irqsave(&migf->list_lock, flags);
list_add_tail(&async_data->buf->buf_elm, &migf->buf_list);
+ if (async_data->buf->stop_copy_chunk_num) {
+ migf->num_ready_chunks++;
+ if (next_required_umem_size &&
+ migf->num_ready_chunks >= MAX_NUM_CHUNKS) {
+ /* Delay the next SAVE till one chunk be consumed */
+ migf->next_required_umem_size = next_required_umem_size;
+ next_required_umem_size = 0;
+ }
+ }
spin_unlock_irqrestore(&migf->list_lock, flags);
- if (initial_pre_copy)
+ if (initial_pre_copy) {
migf->pre_copy_initial_bytes += image_size;
- migf->state = async_data->last_chunk ?
- MLX5_MIGF_STATE_COMPLETE : MLX5_MIGF_STATE_PRE_COPY;
+ migf->state = MLX5_MIGF_STATE_PRE_COPY;
+ }
+ if (stop_copy_last_chunk)
+ migf->state = MLX5_MIGF_STATE_COMPLETE;
wake_up_interruptible(&migf->poll_wait);
+ if (next_required_umem_size)
+ mlx5vf_mig_file_set_save_work(migf,
+ /* Picking up the next chunk num */
+ (async_data->buf->stop_copy_chunk_num % MAX_NUM_CHUNKS) + 1,
+ next_required_umem_size);
+ mlx5vf_save_callback_complete(migf, async_data);
+ return;
}
err:
- /*
- * The error and the cleanup flows can't run from an
- * interrupt context
- */
+ /* The error flow can't run from an interrupt context */
if (status == -EREMOTEIO)
status = MLX5_GET(save_vhca_state_out, async_data->out, status);
async_data->status = status;
@@ -610,7 +651,7 @@ int mlx5vf_cmd_save_vhca_state(struct mlx5vf_pci_core_device *mvdev,
async_data = &migf->async_data;
async_data->buf = buf;
- async_data->last_chunk = !track;
+ async_data->stop_copy_chunk = !track;
async_data->out = kvzalloc(out_size, GFP_KERNEL);
if (!async_data->out) {
err = -ENOMEM;
@@ -618,10 +659,15 @@ int mlx5vf_cmd_save_vhca_state(struct mlx5vf_pci_core_device *mvdev,
}
if (MLX5VF_PRE_COPY_SUPP(mvdev)) {
- if (async_data->last_chunk && migf->buf_header) {
- header_buf = migf->buf_header;
- migf->buf_header = NULL;
- } else {
+ if (async_data->stop_copy_chunk) {
+ u8 header_idx = buf->stop_copy_chunk_num ?
+ buf->stop_copy_chunk_num - 1 : 0;
+
+ header_buf = migf->buf_header[header_idx];
+ migf->buf_header[header_idx] = NULL;
+ }
+
+ if (!header_buf) {
header_buf = mlx5vf_get_data_buffer(migf,
sizeof(struct mlx5_vf_migration_header), DMA_NONE);
if (IS_ERR(header_buf)) {
@@ -631,8 +677,8 @@ int mlx5vf_cmd_save_vhca_state(struct mlx5vf_pci_core_device *mvdev,
}
}
- if (async_data->last_chunk)
- migf->state = MLX5_MIGF_STATE_SAVE_LAST;
+ if (async_data->stop_copy_chunk)
+ migf->state = MLX5_MIGF_STATE_SAVE_STOP_COPY_CHUNK;
async_data->header_buf = header_buf;
get_file(migf->filp);
@@ -707,18 +753,21 @@ void mlx5vf_cmd_dealloc_pd(struct mlx5_vf_migration_file *migf)
void mlx5fv_cmd_clean_migf_resources(struct mlx5_vf_migration_file *migf)
{
struct mlx5_vhca_data_buffer *entry;
+ int i;
lockdep_assert_held(&migf->mvdev->state_mutex);
WARN_ON(migf->mvdev->mdev_detach);
- if (migf->buf) {
- mlx5vf_free_data_buffer(migf->buf);
- migf->buf = NULL;
- }
+ for (i = 0; i < MAX_NUM_CHUNKS; i++) {
+ if (migf->buf[i]) {
+ mlx5vf_free_data_buffer(migf->buf[i]);
+ migf->buf[i] = NULL;
+ }
- if (migf->buf_header) {
- mlx5vf_free_data_buffer(migf->buf_header);
- migf->buf_header = NULL;
+ if (migf->buf_header[i]) {
+ mlx5vf_free_data_buffer(migf->buf_header[i]);
+ migf->buf_header[i] = NULL;
+ }
}
list_splice(&migf->avail_list, &migf->buf_list);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-03 22:42:32 +0000