diff options
| author | Lior Amsalem <alior@marvell.com> | 2015-05-26 16:07:36 +0300 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2015-06-10 19:48:31 +0300 |
| commit | fbea28a2afb4251f985af52eb0180f097acaee16 (patch) | |
| tree | f8f88b492c57092e095878d3d59bfbfabecc1fcc /drivers/dma/mv_xor.h | |
| parent | f1d25e0a9b1a6519580ddf5a7e5538093a504fcd (diff) | |
| download | linux-fbea28a2afb4251f985af52eb0180f097acaee16.tar.xz | |
dmaengine: mv_xor: improve descriptors list handling and reduce locking
This patch change the way free descriptors are marked.
Instead of having a field for descriptor in use, all the descriptors in the
all_slots list are free for use.
This simplify the allocation method and reduce the locking needed.
Signed-off-by: Lior Amsalem <alior@marvell.com>
Reviewed-by: Ofer Heifetz <oferh@marvell.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma/mv_xor.h')
| -rw-r--r-- | drivers/dma/mv_xor.h | 17 |
1 files changed, 6 insertions, 11 deletions
diff --git a/drivers/dma/mv_xor.h b/drivers/dma/mv_xor.h index 6b10c8c647b9..b7455b42137b 100644 --- a/drivers/dma/mv_xor.h +++ b/drivers/dma/mv_xor.h @@ -94,11 +94,11 @@ struct mv_xor_device { * @mmr_base: memory mapped register base * @idx: the index of the xor channel * @chain: device chain view of the descriptors + * @free_slots: free slots usable by the channel + * @allocated_slots: slots allocated by the driver * @completed_slots: slots completed by HW but still need to be acked * @device: parent device * @common: common dmaengine channel object members - * @last_used: place holder for allocation to continue from where it left off - * @all_slots: complete domain of slots usable by the channel * @slots_allocated: records the actual size of the descriptor slot pool * @irq_tasklet: bottom half where mv_xor_slot_cleanup runs * @op_in_desc: new mode of driver, each op is writen to descriptor. @@ -112,14 +112,14 @@ struct mv_xor_chan { int irq; enum dma_transaction_type current_type; struct list_head chain; + struct list_head free_slots; + struct list_head allocated_slots; struct list_head completed_slots; dma_addr_t dma_desc_pool; void *dma_desc_pool_virt; size_t pool_size; struct dma_device dmadev; struct dma_chan dmachan; - struct mv_xor_desc_slot *last_used; - struct list_head all_slots; int slots_allocated; struct tasklet_struct irq_tasklet; int op_in_desc; @@ -130,9 +130,7 @@ struct mv_xor_chan { /** * struct mv_xor_desc_slot - software descriptor - * @slot_node: node on the mv_xor_chan.all_slots list - * @chain_node: node on the mv_xor_chan.chain list - * @completed_node: node on the mv_xor_chan.completed_slots list + * @node: node on the mv_xor_chan lists * @hw_desc: virtual address of the hardware descriptor chain * @phys: hardware address of the hardware descriptor chain * @slot_used: slot in use or not @@ -141,12 +139,9 @@ struct mv_xor_chan { * @async_tx: support for the async_tx api */ struct mv_xor_desc_slot { - struct list_head slot_node; - struct list_head chain_node; - struct list_head completed_node; + struct list_head node; enum dma_transaction_type type; void *hw_desc; - u16 slot_used; u16 idx; struct dma_async_tx_descriptor async_tx; }; |