diff options
Diffstat (limited to 'drivers/usb/host/xhci.h')
| -rw-r--r-- | drivers/usb/host/xhci.h | 84 |
1 files changed, 75 insertions, 9 deletions
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h index a7c4e1122902..7a9447cb6ea9 100644 --- a/drivers/usb/host/xhci.h +++ b/drivers/usb/host/xhci.h @@ -117,7 +117,7 @@ struct xhci_cap_regs { /* true: no secondary Stream ID Support */ #define HCC_NSS(p) ((p) & (1 << 7)) /* Max size for Primary Stream Arrays - 2^(n+1), where n is bits 12:15 */ -#define HCC_MAX_PSA (1 << ((((p) >> 12) & 0xf) + 1)) +#define HCC_MAX_PSA(p) (1 << ((((p) >> 12) & 0xf) + 1)) /* Extended Capabilities pointer from PCI base - section 5.3.6 */ #define HCC_EXT_CAPS(p) XHCI_HCC_EXT_CAPS(p) @@ -585,6 +585,10 @@ struct xhci_ep_ctx { /* Interval - period between requests to an endpoint - 125u increments. */ #define EP_INTERVAL(p) ((p & 0xff) << 16) #define EP_INTERVAL_TO_UFRAMES(p) (1 << (((p) >> 16) & 0xff)) +#define EP_MAXPSTREAMS_MASK (0x1f << 10) +#define EP_MAXPSTREAMS(p) (((p) << 10) & EP_MAXPSTREAMS_MASK) +/* Endpoint is set up with a Linear Stream Array (vs. Secondary Stream Array) */ +#define EP_HAS_LSA (1 << 15) /* ep_info2 bitmasks */ /* @@ -648,8 +652,50 @@ struct xhci_command { /* add context bitmasks */ #define ADD_EP(x) (0x1 << x) +struct xhci_stream_ctx { + /* 64-bit stream ring address, cycle state, and stream type */ + u64 stream_ring; + /* offset 0x14 - 0x1f reserved for HC internal use */ + u32 reserved[2]; +}; + +/* Stream Context Types (section 6.4.1) - bits 3:1 of stream ctx deq ptr */ +#define SCT_FOR_CTX(p) (((p) << 1) & 0x7) +/* Secondary stream array type, dequeue pointer is to a transfer ring */ +#define SCT_SEC_TR 0 +/* Primary stream array type, dequeue pointer is to a transfer ring */ +#define SCT_PRI_TR 1 +/* Dequeue pointer is for a secondary stream array (SSA) with 8 entries */ +#define SCT_SSA_8 2 +#define SCT_SSA_16 3 +#define SCT_SSA_32 4 +#define SCT_SSA_64 5 +#define SCT_SSA_128 6 +#define SCT_SSA_256 7 + +/* Assume no secondary streams for now */ +struct xhci_stream_info { + struct xhci_ring **stream_rings; + /* Number of streams, including stream 0 (which drivers can't use) */ + unsigned int num_streams; + /* The stream context array may be bigger than + * the number of streams the driver asked for + */ + struct xhci_stream_ctx *stream_ctx_array; + unsigned int num_stream_ctxs; + dma_addr_t ctx_array_dma; + /* For mapping physical TRB addresses to segments in stream rings */ + struct radix_tree_root trb_address_map; + struct xhci_command *free_streams_command; +}; + +#define SMALL_STREAM_ARRAY_SIZE 256 +#define MEDIUM_STREAM_ARRAY_SIZE 1024 + struct xhci_virt_ep { struct xhci_ring *ring; + /* Related to endpoints that are configured to use stream IDs only */ + struct xhci_stream_info *stream_info; /* Temporary storage in case the configure endpoint command fails and we * have to restore the device state to the previous state */ @@ -658,6 +704,11 @@ struct xhci_virt_ep { #define SET_DEQ_PENDING (1 << 0) #define EP_HALTED (1 << 1) /* For stall handling */ #define EP_HALT_PENDING (1 << 2) /* For URB cancellation */ +/* Transitioning the endpoint to using streams, don't enqueue URBs */ +#define EP_GETTING_STREAMS (1 << 3) +#define EP_HAS_STREAMS (1 << 4) +/* Transitioning the endpoint to not using streams, don't enqueue URBs */ +#define EP_GETTING_NO_STREAMS (1 << 5) /* ---- Related to URB cancellation ---- */ struct list_head cancelled_td_list; /* The TRB that was last reported in a stopped endpoint ring */ @@ -710,14 +761,6 @@ struct xhci_device_context_array { */ -struct xhci_stream_ctx { - /* 64-bit stream ring address, cycle state, and stream type */ - u64 stream_ring; - /* offset 0x14 - 0x1f reserved for HC internal use */ - u32 reserved[2]; -}; - - struct xhci_transfer_event { /* 64-bit buffer address, or immediate data */ u64 buffer; @@ -952,6 +995,10 @@ union xhci_trb { /* Allow two commands + a link TRB, along with any reserved command TRBs */ #define MAX_RSVD_CMD_TRBS (TRBS_PER_SEGMENT - 3) #define SEGMENT_SIZE (TRBS_PER_SEGMENT*16) +/* SEGMENT_SHIFT should be log2(SEGMENT_SIZE). + * Change this if you change TRBS_PER_SEGMENT! + */ +#define SEGMENT_SHIFT 10 /* TRB buffer pointers can't cross 64KB boundaries */ #define TRB_MAX_BUFF_SHIFT 16 #define TRB_MAX_BUFF_SIZE (1 << TRB_MAX_BUFF_SHIFT) @@ -1088,6 +1135,8 @@ struct xhci_hcd { /* DMA pools */ struct dma_pool *device_pool; struct dma_pool *segment_pool; + struct dma_pool *small_streams_pool; + struct dma_pool *medium_streams_pool; #ifdef CONFIG_USB_XHCI_HCD_DEBUGGING /* Poll the rings - for debugging */ @@ -1242,6 +1291,17 @@ void xhci_ring_free(struct xhci_hcd *xhci, struct xhci_ring *ring); void xhci_free_or_cache_endpoint_ring(struct xhci_hcd *xhci, struct xhci_virt_device *virt_dev, unsigned int ep_index); +struct xhci_stream_info *xhci_alloc_stream_info(struct xhci_hcd *xhci, + unsigned int num_stream_ctxs, + unsigned int num_streams, gfp_t flags); +void xhci_free_stream_info(struct xhci_hcd *xhci, + struct xhci_stream_info *stream_info); +void xhci_setup_streams_ep_input_ctx(struct xhci_hcd *xhci, + struct xhci_ep_ctx *ep_ctx, + struct xhci_stream_info *stream_info); +void xhci_setup_no_streams_ep_input_ctx(struct xhci_hcd *xhci, + struct xhci_ep_ctx *ep_ctx, + struct xhci_virt_ep *ep); struct xhci_command *xhci_alloc_command(struct xhci_hcd *xhci, bool allocate_in_ctx, bool allocate_completion, gfp_t mem_flags); @@ -1266,6 +1326,12 @@ int xhci_get_frame(struct usb_hcd *hcd); irqreturn_t xhci_irq(struct usb_hcd *hcd); int xhci_alloc_dev(struct usb_hcd *hcd, struct usb_device *udev); void xhci_free_dev(struct usb_hcd *hcd, struct usb_device *udev); +int xhci_alloc_streams(struct usb_hcd *hcd, struct usb_device *udev, + struct usb_host_endpoint **eps, unsigned int num_eps, + unsigned int num_streams, gfp_t mem_flags); +int xhci_free_streams(struct usb_hcd *hcd, struct usb_device *udev, + struct usb_host_endpoint **eps, unsigned int num_eps, + gfp_t mem_flags); int xhci_address_device(struct usb_hcd *hcd, struct usb_device *udev); int xhci_update_hub_device(struct usb_hcd *hcd, struct usb_device *hdev, struct usb_tt *tt, gfp_t mem_flags); |