/* * Copyright (c) 2016 Oracle. All rights reserved. * * This software is available to you under a choice of one of two * licenses. You may choose to be licensed under the terms of the GNU * General Public License (GPL) Version 2, available from the file * COPYING in the main directory of this source tree, or the * OpenIB.org BSD license below: * * Redistribution and use in source and binary forms, with or * without modification, are permitted provided that the following * conditions are met: * * - Redistributions of source code must retain the above * copyright notice, this list of conditions and the following * disclaimer. * * - Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials * provided with the distribution. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #ifndef _RDS_IB_MR_H #define _RDS_IB_MR_H #include #include "rds.h" #include "ib.h" #define RDS_MR_1M_POOL_SIZE (8192 / 2) #define RDS_MR_1M_MSG_SIZE 256 #define RDS_MR_8K_MSG_SIZE 2 #define RDS_MR_8K_SCALE (256 / (RDS_MR_8K_MSG_SIZE + 1)) #define RDS_MR_8K_POOL_SIZE (RDS_MR_8K_SCALE * (8192 / 2)) struct rds_ib_fmr { struct ib_fmr *fmr; u64 *dma; }; enum rds_ib_fr_state { FRMR_IS_FREE, /* mr invalidated & ready for use */ FRMR_IS_INUSE, /* mr is in use or used & can be invalidated */ FRMR_IS_STALE, /* Stale MR and needs to be dropped */ }; struct rds_ib_frmr { struct ib_mr *mr; enum rds_ib_fr_state fr_state; bool fr_inv; struct ib_send_wr fr_wr; unsigned int dma_npages; unsigned int sg_byte_len; }; /* This is stored as mr->r_trans_private. */ struct rds_ib_mr { struct rds_ib_device *device; struct rds_ib_mr_pool *pool; struct rds_ib_connection *ic; struct llist_node llnode; /* unmap_list is for freeing */ struct list_head unmap_list; unsigned int remap_count; struct scatterlist *sg; unsigned int sg_len; int sg_dma_len; union { struct rds_ib_fmr fmr; struct rds_ib_frmr frmr; } u; }; /* Our own little MR pool */ struct rds_ib_mr_pool { unsigned int pool_type; struct mutex flush_lock; /* serialize fmr invalidate */ struct delayed_work flush_worker; /* flush worker */ atomic_t item_count; /* total # of MRs */ atomic_t dirty_count; /* # dirty of MRs */ struct llist_head drop_list; /* MRs not reached max_maps */ struct llist_head free_list; /* unused MRs */ struct llist_head clean_list; /* unused & unmapped MRs */ wait_queue_head_t flush_wait; atomic_t free_pinned; /* memory pinned by free MRs */ unsigned long max_items; unsigned long max_items_soft; unsigned long max_free_pinned; struct ib_fmr_attr fmr_attr; bool use_fastreg; }; extern struct workqueue_struct *rds_ib_mr_wq; extern unsigned int rds_ib_mr_1m_pool_size; extern unsigned int rds_ib_mr_8k_pool_size; extern bool prefer_frmr; struct rds_ib_mr_pool *rds_ib_create_mr_pool(struct rds_ib_device *rds_dev, int npages); void rds_ib_get_mr_info(struct rds_ib_device *rds_ibdev, struct rds_info_rdma_connection *iinfo); void rds_ib_destroy_mr_pool(struct rds_ib_mr_pool *); void *rds_ib_get_mr(struct scatterlist *sg, unsigned long nents, struct rds_sock *rs, u32 *key_ret); void rds_ib_sync_mr(void *trans_private, int dir); void rds_ib_free_mr(void *trans_private, int invalidate); void rds_ib_flush_mrs(void); int rds_ib_mr_init(void); void rds_ib_mr_exit(void); void __rds_ib_teardown_mr(struct rds_ib_mr *); void rds_ib_teardown_mr(struct rds_ib_mr *); struct rds_ib_mr *rds_ib_alloc_fmr(struct rds_ib_device *, int); int rds_ib_map_fmr(struct rds_ib_device *, struct rds_ib_mr *, struct scatterlist *, unsigned int); struct rds_ib_mr *rds_ib_reuse_mr(struct rds_ib_mr_pool *); int rds_ib_flush_mr_pool(struct rds_ib_mr_pool *, int, struct rds_ib_mr **); struct rds_ib_mr *rds_ib_reg_fmr(struct rds_ib_device *, struct scatterlist *, unsigned long, u32 *); struct rds_ib_mr *rds_ib_try_reuse_ibmr(struct rds_ib_mr_pool *); void rds_ib_unreg_fmr(struct list_head *, unsigned int *, unsigned long *, unsigned int); void rds_ib_free_fmr_list(struct rds_ib_mr *); struct rds_ib_mr *rds_ib_reg_frmr(struct rds_ib_device *rds_ibdev, struct rds_ib_connection *ic, struct scatterlist *sg, unsigned long nents, u32 *key); void rds_ib_unreg_frmr(struct list_head *list, unsigned int *nfreed, unsigned long *unpinned, unsigned int goal); void rds_ib_free_frmr_list(struct rds_ib_mr *); #endif 10:17:32 +0100 commite6e7b48b295afa5a5ab440de0a94d9ad8b3ce2d0 (patch) tree77cadb6d8aad1b52c34e4afa8c9deef603bbe2ed /include/dt-bindings/clock/marvell,mmp2.h parent4e5b54f127426c82dc2816340c26d951a5bb3429 (diff)
drm: Don't race connector registration
I was under the misconception that the sysfs dev stuff can be fully set up, and then registered all in one step with device_add. That's true for properties and property groups, but not for parents and child devices. Those must be fully registered before you can register a child. Add a bit of tracking to make sure that asynchronous mst connector hotplugging gets this right. For consistency we rely upon the implicit barriers of the connector->mutex, which is taken anyway, to ensure that at least either the connector or device registration call will work out. Mildly tested since I can't reliably reproduce this on my mst box here. Reported-by: Dave Hansen <dave.hansen@intel.com> Cc: Dave Hansen <dave.hansen@intel.com> Acked-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1484237756-2720-1-git-send-email-daniel.vetter@ffwll.ch
Diffstat (limited to 'include/dt-bindings/clock/marvell,mmp2.h')