diff options
| author | Koul, Vinod <vinod.koul@intel.com> | 2010-10-04 14:42:40 +0400 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2010-10-08 02:03:42 +0400 |
| commit | 53a61badf47e674fb43d73cd22f0f8065098ddf6 (patch) | |
| tree | abf0b87c397d9129f22bd34bbfc8d9f9cb139cab /drivers/dma/intel_mid_dma_regs.h | |
| parent | cc60f8878eab892c03d06b10f389232b9b66bd83 (diff) | |
| download | linux-53a61badf47e674fb43d73cd22f0f8065098ddf6.tar.xz | |
intel_mid_dma: Add runtime PM support
This patch adds runtime PM support in this dma driver
for 4 PCI Controllers
Whenever the driver is idle (no channels grabbed), it
can go to low power state
It also adds the PCI suspend and resume support
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/dma/intel_mid_dma_regs.h')
| -rw-r--r-- | drivers/dma/intel_mid_dma_regs.h | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/drivers/dma/intel_mid_dma_regs.h b/drivers/dma/intel_mid_dma_regs.h index d81aa658ab09..a12dd2572dc3 100644 --- a/drivers/dma/intel_mid_dma_regs.h +++ b/drivers/dma/intel_mid_dma_regs.h @@ -29,7 +29,7 @@ #include <linux/dmapool.h> #include <linux/pci_ids.h> -#define INTEL_MID_DMA_DRIVER_VERSION "1.0.5" +#define INTEL_MID_DMA_DRIVER_VERSION "1.0.6" #define REG_BIT0 0x00000001 #define REG_BIT8 0x00000100 @@ -152,6 +152,7 @@ union intel_mid_dma_cfg_hi { u32 cfg_hi; }; + /** * struct intel_mid_dma_chan - internal mid representation of a DMA channel * @chan: dma_chan strcture represetation for mid chan @@ -166,6 +167,7 @@ union intel_mid_dma_cfg_hi { * @slave: dma slave struture * @descs_allocated: total number of decsiptors allocated * @dma: dma device struture pointer + * @busy: bool representing if ch is busy (active txn) or not * @in_use: bool representing if ch is in use or not */ struct intel_mid_dma_chan { @@ -181,6 +183,7 @@ struct intel_mid_dma_chan { struct intel_mid_dma_slave *slave; unsigned int descs_allocated; struct middma_device *dma; + bool busy; bool in_use; }; @@ -190,6 +193,10 @@ static inline struct intel_mid_dma_chan *to_intel_mid_dma_chan( return container_of(chan, struct intel_mid_dma_chan, chan); } +enum intel_mid_dma_state { + RUNNING = 0, + SUSPENDED, +}; /** * struct middma_device - internal representation of a DMA device * @pdev: PCI device @@ -205,6 +212,7 @@ static inline struct intel_mid_dma_chan *to_intel_mid_dma_chan( * @max_chan: max number of chs supported (from drv_data) * @block_size: Block size of DMA transfer supported (from drv_data) * @pimr_mask: MMIO register addr for periphral interrupt (from drv_data) + * @state: dma PM device state */ struct middma_device { struct pci_dev *pdev; @@ -220,6 +228,7 @@ struct middma_device { int max_chan; int block_size; unsigned int pimr_mask; + enum intel_mid_dma_state state; }; static inline struct middma_device *to_middma_device(struct dma_device *common) @@ -257,4 +266,7 @@ static inline struct intel_mid_dma_desc *to_intel_mid_dma_desc { return container_of(txd, struct intel_mid_dma_desc, txd); } + +int dma_resume(struct pci_dev *pci); + #endif /*__INTEL_MID_DMAC_REGS_H__*/ |