/* * 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 class='label'>context:space:mode:
authorJens Axboe <axboe@fb.com>2017-01-27 11:56:06 -0700
committerJens Axboe <axboe@fb.com>2017-01-27 11:56:06 -0700
commitc14024dbb156c8392908aaa822097d27c6af8ec8 (patch)
tree02f6ffa664b16bd76750c05f62708a518de2acdc /net/mac80211
parent08965c2eba135bdfb6e86cf25308e01421c7e0ce (diff)
parent3b4f18843e511193e7eb616710e838f5852e661d (diff)
Merge branch 'stable/for-jens-4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen into for-linus
Konrad writes: Please pull in your 'for-linus' branch two little fixes for Xen block front: One fix is for handling the XEN_PAGE_SIZE != PAGE_SIZE (4KB vs 64KB on ARM for example) mishandling while the other is fixing the accounting for the configuration changes.
Diffstat (limited to 'net/mac80211')