vasilito
dc68054305
- Restore 29 recipe symlinks (libdrm, qtbase, dbus, sddm, pipewire, etc.) - Restore 33 patches (KDE, libdrm, mesa, pipewire, sddm, wireplumber) - Restore 20+ local/scripts (audit, lint, test, build helpers) - Restore src/cook/scheduler.rs, status.rs, gnu-config/ - Restore scripts/patch-inclusion-gate.sh, run_mini1.sh, validate-collision-log.sh - Recover TLC source from HEAD (was overwritten by 0.2.3 checkout) - Recover 11 local/docs plans from HEAD (were overwritten) - Recover qt6-wayland-smoke symlink from HEAD - Fix MOTD: remove garbled ASCII art, use clean text - Update version: 0.2.0 -> 0.2.4 in os-release, motd, config - Reduce filesystem_size: 1536 -> 512 MiB - Add ABSOLUTE RULE to AGENTS.md: never delete/ignore packages - Reduce pcid scheme log verbosity: info -> debug
77 lines
1.9 KiB
C
77 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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#ifndef BLK_MQ_DMA_H
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#define BLK_MQ_DMA_H
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#include <linux/blk-mq.h>
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#include <linux/pci-p2pdma.h>
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struct blk_map_iter {
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struct bvec_iter iter;
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struct bio *bio;
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struct bio_vec *bvecs;
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bool is_integrity;
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};
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struct blk_dma_iter {
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/* Output address range for this iteration */
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dma_addr_t addr;
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u32 len;
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struct pci_p2pdma_map_state p2pdma;
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/* Status code. Only valid when blk_rq_dma_map_iter_* returned false */
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blk_status_t status;
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/* Internal to blk_rq_dma_map_iter_* */
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struct blk_map_iter iter;
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};
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bool blk_rq_dma_map_iter_start(struct request *req, struct device *dma_dev,
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struct dma_iova_state *state, struct blk_dma_iter *iter);
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bool blk_rq_dma_map_iter_next(struct request *req, struct device *dma_dev,
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struct blk_dma_iter *iter);
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/**
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* blk_rq_dma_map_coalesce - were all segments coalesced?
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* @state: DMA state to check
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*
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* Returns true if blk_rq_dma_map_iter_start coalesced all segments into a
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* single DMA range.
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*/
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static inline bool blk_rq_dma_map_coalesce(struct dma_iova_state *state)
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{
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return dma_use_iova(state);
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}
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/**
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* blk_rq_dma_unmap - try to DMA unmap a request
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* @req: request to unmap
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* @dma_dev: device to unmap from
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* @state: DMA IOVA state
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* @mapped_len: number of bytes to unmap
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* @map: peer-to-peer mapping type
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*
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* Returns %false if the callers need to manually unmap every DMA segment
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* mapped using @iter or %true if no work is left to be done.
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*/
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static inline bool blk_rq_dma_unmap(struct request *req, struct device *dma_dev,
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struct dma_iova_state *state, size_t mapped_len,
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enum pci_p2pdma_map_type map)
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{
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if (map == PCI_P2PDMA_MAP_BUS_ADDR)
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return true;
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if (dma_use_iova(state)) {
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unsigned int attrs = 0;
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if (map == PCI_P2PDMA_MAP_THRU_HOST_BRIDGE)
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attrs |= DMA_ATTR_MMIO;
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dma_iova_destroy(dma_dev, state, mapped_len, rq_dma_dir(req),
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attrs);
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return true;
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}
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return !dma_need_unmap(dma_dev);
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}
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#endif /* BLK_MQ_DMA_H */
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