/****************************************************************************** AudioScience HPI driver Copyright (C) 1997-2012 AudioScience Inc. This program is free software; you can redistribute it and/or modify it under the terms of version 2 of the GNU General Public License as published by the Free Software Foundation; This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA HPI Operating System function implementation for Linux (C) Copyright AudioScience Inc. 1997-2003 ******************************************************************************/ #define SOURCEFILE_NAME "hpios.c" #include "hpi_internal.h" #include "hpidebug.h" #include #include void hpios_delay_micro_seconds(u32 num_micro_sec) { if ((usecs_to_jiffies(num_micro_sec) > 1) && !in_interrupt()) { /* MUST NOT SCHEDULE IN INTERRUPT CONTEXT! */ schedule_timeout_uninterruptible(usecs_to_jiffies (num_micro_sec)); } else if (num_micro_sec <= 2000) udelay(num_micro_sec); else mdelay(num_micro_sec / 1000); } /** Allocate an area of locked memory for bus master DMA operations. If allocation fails, return 1, and *pMemArea.size = 0 */ u16 hpios_locked_mem_alloc(struct consistent_dma_area *p_mem_area, u32 size, struct pci_dev *pdev) { /*?? any benefit in using managed dmam_alloc_coherent? */ p_mem_area->vaddr = dma_alloc_coherent(&pdev->dev, size, &p_mem_area->dma_handle, GFP_DMA32 | GFP_KERNEL); if (p_mem_area->vaddr) { HPI_DEBUG_LOG(DEBUG, "allocated %d bytes, dma 0x%x vma %p\n", size, (unsigned int)p_mem_area->dma_handle, p_mem_area->vaddr); p_mem_area->pdev = &pdev->dev; p_mem_area->size = size; return 0; } else { HPI_DEBUG_LOG(WARNING, "failed to allocate %d bytes locked memory\n", size); p_mem_area->size = 0; return 1; } } u16 hpios_locked_mem_free(struct consistent_dma_area *p_mem_area) { if (p_mem_area->size) { dma_free_coherent(p_mem_area->pdev, p_mem_area->size, p_mem_area->vaddr, p_mem_area->dma_handle); HPI_DEBUG_LOG(DEBUG, "freed %lu bytes, dma 0x%x vma %p\n", (unsigned long)p_mem_area->size, (unsigned int)p_mem_area->dma_handle, p_mem_area->vaddr); p_mem_area->size = 0; return 0; } else { return 1; } } '>committer
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authorRadim Krčmář <rkrcmar@redhat.com>2017-01-17 15:04:59 +0100
committerRadim Krčmář <rkrcmar@redhat.com>2017-01-17 15:04:59 +0100
commit1b1973ef9a6a951903c1d7701f0c420b27e77cf3 (patch)
treeafcfd18b45a7dc163cce3e77a8ee9ec6edf04720 /sound/soc/mxs
parent49def1853334396f948dcb4cedb9347abb318df5 (diff)
parent1193e6aeecb36c74c48c7cd0f641acbbed9ddeef (diff)
Merge tag 'kvm-arm-for-4.10-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm
KVM/ARM updates for 4.10-rc4 - Fix for timer setup on VHE machines - Drop spurious warning when the timer races against the vcpu running again - Prevent a vgic deadlock when the initialization fails
Diffstat (limited to 'sound/soc/mxs')