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path: root/drivers/usb/host/xhci.h
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Diffstat (limited to 'drivers/usb/host/xhci.h')
-rw-r--r--drivers/usb/host/xhci.h112
1 files changed, 101 insertions, 11 deletions
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index ea389e9a4931..dada2fb59261 100644
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -26,8 +26,8 @@
#include <linux/usb.h>
#include <linux/timer.h>
#include <linux/kernel.h>
+#include <linux/usb/hcd.h>
-#include "../core/hcd.h"
/* Code sharing between pci-quirks and xhci hcd */
#include "xhci-ext-caps.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)
@@ -444,6 +444,7 @@ struct xhci_doorbell_array {
/* Endpoint Target - bits 0:7 */
#define EPI_TO_DB(p) (((p) + 1) & 0xff)
+#define STREAM_ID_TO_DB(p) (((p) & 0xffff) << 16)
/**
@@ -585,6 +586,10 @@ 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 +653,50 @@ 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
*/
@@ -658,11 +705,17 @@ 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 */
union xhci_trb *stopped_trb;
struct xhci_td *stopped_td;
+ unsigned int stopped_stream;
/* Watchdog timer for stop endpoint command to cancel URBs */
struct timer_list stop_cmd_timer;
int stop_cmds_pending;
@@ -710,14 +763,6 @@ 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;
@@ -828,6 +873,10 @@ struct xhci_event_cmd {
#define TRB_TO_EP_INDEX(p) ((((p) & (0x1f << 16)) >> 16) - 1)
#define EP_ID_FOR_TRB(p) ((((p) + 1) & 0x1f) << 16)
+/* Set TR Dequeue Pointer command TRB fields */
+#define TRB_TO_STREAM_ID(p) ((((p) & (0xffff << 16)) >> 16))
+#define STREAM_ID_FOR_TRB(p) ((((p)) & 0xffff) << 16)
+
/* Port Status Change Event TRB fields */
/* Port ID - bits 31:24 */
@@ -952,6 +1001,10 @@ 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)
@@ -993,6 +1046,7 @@ struct xhci_ring {
* if we own the TRB (if we are the consumer). See section 4.9.1.
*/
u32 cycle_state;
+ unsigned int stream_id;
};
struct xhci_erst_entry {
@@ -1088,6 +1142,8 @@ 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 */
@@ -1216,6 +1272,9 @@ void xhci_dbg_ring_ptrs(struct xhci_hcd *xhci, struct xhci_ring *ring);
void xhci_dbg_ctx(struct xhci_hcd *xhci, struct xhci_container_ctx *ctx, unsigned int last_ep);
char *xhci_get_slot_state(struct xhci_hcd *xhci,
struct xhci_container_ctx *ctx);
+void xhci_dbg_ep_rings(struct xhci_hcd *xhci,
+ unsigned int slot_id, unsigned int ep_index,
+ struct xhci_virt_ep *ep);
/* xHCI memory management */
void xhci_mem_cleanup(struct xhci_hcd *xhci);
@@ -1242,6 +1301,29 @@ 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_ring *xhci_dma_to_transfer_ring(
+ struct xhci_virt_ep *ep,
+ u64 address);
+struct xhci_ring *xhci_urb_to_transfer_ring(struct xhci_hcd *xhci,
+ struct urb *urb);
+struct xhci_ring *xhci_triad_to_transfer_ring(struct xhci_hcd *xhci,
+ unsigned int slot_id, unsigned int ep_index,
+ unsigned int stream_id);
+struct xhci_ring *xhci_stream_id_to_ring(
+ struct xhci_virt_device *dev,
+ unsigned int ep_index,
+ unsigned int stream_id);
struct xhci_command *xhci_alloc_command(struct xhci_hcd *xhci,
bool allocate_in_ctx, bool allocate_completion,
gfp_t mem_flags);
@@ -1266,6 +1348,12 @@ 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);
@@ -1308,9 +1396,11 @@ int xhci_queue_reset_ep(struct xhci_hcd *xhci, int slot_id,
int xhci_queue_reset_device(struct xhci_hcd *xhci, u32 slot_id);
void xhci_find_new_dequeue_state(struct xhci_hcd *xhci,
unsigned int slot_id, unsigned int ep_index,
- struct xhci_td *cur_td, struct xhci_dequeue_state *state);
+ unsigned int stream_id, struct xhci_td *cur_td,
+ struct xhci_dequeue_state *state);
void xhci_queue_new_dequeue_state(struct xhci_hcd *xhci,
unsigned int slot_id, unsigned int ep_index,
+ unsigned int stream_id,
struct xhci_dequeue_state *deq_state);
void xhci_cleanup_stalled_ring(struct xhci_hcd *xhci,
struct usb_device *udev, unsigned int ep_index);