/* * Thunderbolt Cactus Ridge driver - NHI driver * * Copyright (c) 2014 Andreas Noever */ #ifndef DSL3510_H_ #define DSL3510_H_ #include #include /** * struct tb_nhi - thunderbolt native host interface */ struct tb_nhi { struct mutex lock; /* * Must be held during ring creation/destruction. * Is acquired by interrupt_work when dispatching * interrupts to individual rings. **/ struct pci_dev *pdev; void __iomem *iobase; struct tb_ring **tx_rings; struct tb_ring **rx_rings; struct work_struct interrupt_work; u32 hop_count; /* Number of rings (end point hops) supported by NHI. */ }; /** * struct tb_ring - thunderbolt TX or RX ring associated with a NHI */ struct tb_ring { struct mutex lock; /* must be acquired after nhi->lock */ struct tb_nhi *nhi; int size; int hop; int head; /* write next descriptor here */ int tail; /* complete next descriptor here */ struct ring_desc *descriptors; dma_addr_t descriptors_dma; struct list_head queue; struct list_head in_flight; struct work_struct work; bool is_tx:1; /* rx otherwise */ bool running:1; }; struct ring_frame; typedef void (*ring_cb)(struct tb_ring*, struct ring_frame*, bool canceled); /** * struct ring_frame - for use with ring_rx/ring_tx */ struct ring_frame { dma_addr_t buffer_phy; ring_cb callback; struct list_head list; u32 size:12; /* TX: in, RX: out*/ u32 flags:12; /* RX: out */ u32 eof:4; /* TX:in, RX: out */ u32 sof:4; /* TX:in, RX: out */ }; #define TB_FRAME_SIZE 0x100 /* minimum size for ring_rx */ struct tb_ring *ring_alloc_tx(struct tb_nhi *nhi, int hop, int size); struct tb_ring *ring_alloc_rx(struct tb_nhi *nhi, int hop, int size); void ring_start(struct tb_ring *ring); void ring_stop(struct tb_ring *ring); void ring_free(struct tb_ring *ring); int __ring_enqueue(struct tb_ring *ring, struct ring_frame *frame); /** * ring_rx() - enqueue a frame on an RX ring * * frame->buffer, frame->buffer_phy and frame->callback have to be set. The * buffer must contain at least TB_FRAME_SIZE bytes. * * frame->callback will be invoked with frame->size, frame->flags, frame->eof, * frame->sof set once the frame has been received. * * If ring_stop is called after the packet has been enqueued frame->callback * will be called with canceled set to true. * * Return: Returns ESHUTDOWN if ring_stop has been called. Zero otherwise. */ static inline int ring_rx(struct tb_ring *ring, struct ring_frame *frame) { WARN_ON(ring->is_tx); return __ring_enqueue(ring, frame); } /** * ring_tx() - enqueue a frame on an TX ring * * frame->buffer, frame->buffer_phy, frame->callback, frame->size, frame->eof * and frame->sof have to be set. * * frame->callback will be invoked with once the frame has been transmitted. * * If ring_stop is called after the packet has been enqueued frame->callback * will be called with canceled set to true. * * Return: Returns ESHUTDOWN if ring_stop has been called. Zero otherwise. */ static inline int ring_tx(struct tb_ring *ring, struct ring_frame *frame) { WARN_ON(!ring->is_tx); return __ring_enqueue(ring, frame); } #endif d='selected'>3space:mode:
authorMark Brown <broonie@kernel.org>2016-12-12 12:17:19 +0000
committerMark Brown <broonie@kernel.org>2016-12-12 12:17:19 +0000
commitc1b0789271b13dd7561f78370122c3183cd74ab0 (patch)
treef4eda3db7bd1b059de81cd4bec7fbb871661dbe2 /include
parent69973b830859bc6529a7a0468ba0d80ee5117826 (diff)
parent618c808968852609d2d9f0e5cfc351a4807ef8d0 (diff)
Merge remote-tracking branch 'regulator/fix/axp20x' into regulator-linus
Diffstat (limited to 'include')