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The Qualcomm Technologies HIDMA device has been designed to support virtualization technology. The driver has been divided into two to follow the hardware design. 1. HIDMA Management driver 2. HIDMA Channel driver Each HIDMA HW consists of multiple channels. These channels share some set of common parameters. These parameters are initialized by the management driver during power up. Same management driver is used for monitoring the execution of the channels. Management driver can change the performance behavior dynamically such as bandwidth allocation and prioritization. The management driver is executed in host context and is the main management entity for all channels provided by the device. Signed-off-by: Sinan Kaya <okaya@codeaurora.org> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
40 lines
1.1 KiB
C
40 lines
1.1 KiB
C
/*
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* Qualcomm Technologies HIDMA Management common header
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*
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* Copyright (c) 2015, The Linux Foundation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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struct hidma_mgmt_dev {
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u8 hw_version_major;
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u8 hw_version_minor;
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u32 max_wr_xactions;
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u32 max_rd_xactions;
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u32 max_write_request;
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u32 max_read_request;
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u32 dma_channels;
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u32 chreset_timeout_cycles;
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u32 hw_version;
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u32 *priority;
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u32 *weight;
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/* Hardware device constants */
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void __iomem *virtaddr;
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resource_size_t addrsize;
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struct kobject **chroots;
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struct platform_device *pdev;
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};
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int hidma_mgmt_init_sys(struct hidma_mgmt_dev *dev);
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int hidma_mgmt_setup(struct hidma_mgmt_dev *mgmtdev);
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