/* * OHCI HCD (Host Controller Driver) for USB. * * (C) Copyright 1999 Roman Weissgaerber * (C) Copyright 2000-2002 David Brownell * * This file is licenced under the GPL. */ /*-------------------------------------------------------------------------*/ /* * OHCI deals with three types of memory: * - data used only by the HCD ... kmalloc is fine * - async and periodic schedules, shared by HC and HCD ... these * need to use dma_pool or dma_alloc_coherent * - driver buffers, read/written by HC ... the hcd glue or the * device driver provides us with dma addresses * * There's also "register" data, which is memory mapped. * No memory seen by this driver (or any HCD) may be paged out. */ /*-------------------------------------------------------------------------*/ static void ohci_hcd_init (struct ohci_hcd *ohci) { ohci->next_statechange = jiffies; spin_lock_init (&ohci->lock); INIT_LIST_HEAD (&ohci->pending); INIT_LIST_HEAD(&ohci->eds_in_use); } /*-------------------------------------------------------------------------*/ static int ohci_mem_init (struct ohci_hcd *ohci) { ohci->td_cache = dma_pool_create ("ohci_td", ohci_to_hcd(ohci)->self.controller, sizeof (struct td), 32 /* byte alignment */, 0 /* no page-crossing issues */); if (!ohci->td_cache) return -ENOMEM; ohci->ed_cache = dma_pool_create ("ohci_ed", ohci_to_hcd(ohci)->self.controller, sizeof (struct ed), 16 /* byte alignment */, 0 /* no page-crossing issues */); if (!ohci->ed_cache) { dma_pool_destroy (ohci->td_cache); return -ENOMEM; } return 0; } static void ohci_mem_cleanup (struct ohci_hcd *ohci) { if (ohci->td_cache) { dma_pool_destroy (ohci->td_cache); ohci->td_cache = NULL; } if (ohci->ed_cache) { dma_pool_destroy (ohci->ed_cache); ohci->ed_cache = NULL; } } /*-------------------------------------------------------------------------*/ /* ohci "done list" processing needs this mapping */ static inline struct td * dma_to_td (struct ohci_hcd *hc, dma_addr_t td_dma) { struct td *td; td_dma &= TD_MASK; td = hc->td_hash [TD_HASH_FUNC(td_dma)]; while (td && td->td_dma != td_dma) td = td->td_hash; return td; } /* TDs ... */ static struct td * td_alloc (struct ohci_hcd *hc, gfp_t mem_flags) { dma_addr_t dma; struct td *td; td = dma_pool_zalloc (hc->td_cache, mem_flags, &dma); if (td) { /* in case hc fetches it, make it look dead */ td->hwNextTD = cpu_to_hc32 (hc, dma); td->td_dma = dma; /* hashed in td_fill */ } return td; } static void td_free (struct ohci_hcd *hc, struct td *td) { struct td **prev = &hc->td_hash [TD_HASH_FUNC (td->td_dma)]; while (*prev && *prev != td) prev = &(*prev)->td_hash; if (*prev) *prev = td->td_hash; else if ((td->hwINFO & cpu_to_hc32(hc, TD_DONE)) != 0) ohci_dbg (hc, "no hash for td %p\n", td); dma_pool_free (hc->td_cache, td, td->td_dma); } /*-------------------------------------------------------------------------*/ /* EDs ... */ static struct ed * ed_alloc (struct ohci_hcd *hc, gfp_t mem_flags) { dma_addr_t dma; struct ed *ed; ed = dma_pool_zalloc (hc->ed_cache, mem_flags, &dma); if (ed) { INIT_LIST_HEAD (&ed->td_list); ed->dma = dma; } return ed; } static void ed_free (struct ohci_hcd *hc, struct ed *ed) { dma_pool_free (hc->ed_cache, ed, ed->dma); } it/tools/scripts/Makefile.arch?h=nds-private-remove&id=433e19cf33d34bb6751c874a9c00980552fe508c'>Makefile.arch
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authorDexuan Cui <decui@microsoft.com>2017-01-28 11:46:02 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-01-31 10:59:48 +0100
commit433e19cf33d34bb6751c874a9c00980552fe508c (patch)
treece6547ef2987fbb289fa28f03536328a42781651 /tools/scripts/Makefile.arch
parent191e885a2e130e639bb0c8ee350d7047294f2ce6 (diff)
Drivers: hv: vmbus: finally fix hv_need_to_signal_on_read()
Commit a389fcfd2cb5 ("Drivers: hv: vmbus: Fix signaling logic in hv_need_to_signal_on_read()") added the proper mb(), but removed the test "prev_write_sz < pending_sz" when making the signal decision. As a result, the guest can signal the host unnecessarily, and then the host can throttle the guest because the host thinks the guest is buggy or malicious; finally the user running stress test can perceive intermittent freeze of the guest. This patch brings back the test, and properly handles the in-place consumption APIs used by NetVSC (see get_next_pkt_raw(), put_pkt_raw() and commit_rd_index()). Fixes: a389fcfd2cb5 ("Drivers: hv: vmbus: Fix signaling logic in hv_need_to_signal_on_read()") Signed-off-by: Dexuan Cui <decui@microsoft.com> Reported-by: Rolf Neugebauer <rolf.neugebauer@docker.com> Tested-by: Rolf Neugebauer <rolf.neugebauer@docker.com> Cc: "K. Y. Srinivasan" <kys@microsoft.com> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: Stephen Hemminger <sthemmin@microsoft.com> Cc: <stable@vger.kernel.org> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools/scripts/Makefile.arch')