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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/staging/media/atomisp/pci/runtime/isys/src/ibuf_ctrl_rmgr.c | |
parent | Initial commit. (diff) | |
download | linux-upstream.tar.xz linux-upstream.zip |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | drivers/staging/media/atomisp/pci/runtime/isys/src/ibuf_ctrl_rmgr.c | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/drivers/staging/media/atomisp/pci/runtime/isys/src/ibuf_ctrl_rmgr.c b/drivers/staging/media/atomisp/pci/runtime/isys/src/ibuf_ctrl_rmgr.c new file mode 100644 index 000000000..9710493c4 --- /dev/null +++ b/drivers/staging/media/atomisp/pci/runtime/isys/src/ibuf_ctrl_rmgr.c @@ -0,0 +1,122 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Support for Intel Camera Imaging ISP subsystem. + * Copyright (c) 2015, Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope 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. + */ + +#include "system_global.h" + +#include "assert_support.h" +#include "platform_support.h" +#include "ia_css_isys.h" +#include "ibuf_ctrl_rmgr.h" + +static ibuf_rsrc_t ibuf_rsrc; + +static ibuf_handle_t *getHandle(uint16_t index) +{ + ibuf_handle_t *handle = NULL; + + if (index < MAX_IBUF_HANDLES) + handle = &ibuf_rsrc.handles[index]; + return handle; +} + +void ia_css_isys_ibuf_rmgr_init(void) +{ + memset(&ibuf_rsrc, 0, sizeof(ibuf_rsrc)); + ibuf_rsrc.free_size = MAX_INPUT_BUFFER_SIZE; +} + +void ia_css_isys_ibuf_rmgr_uninit(void) +{ + memset(&ibuf_rsrc, 0, sizeof(ibuf_rsrc)); + ibuf_rsrc.free_size = MAX_INPUT_BUFFER_SIZE; +} + +bool ia_css_isys_ibuf_rmgr_acquire( + u32 size, + uint32_t *start_addr) +{ + bool retval = false; + bool input_buffer_found = false; + u32 aligned_size; + ibuf_handle_t *handle = NULL; + u16 i; + + assert(start_addr); + assert(size > 0); + + aligned_size = (size + (IBUF_ALIGN - 1)) & ~(IBUF_ALIGN - 1); + + /* Check if there is an available un-used handle with the size + * that will fulfill the request. + */ + if (ibuf_rsrc.num_active < ibuf_rsrc.num_allocated) { + for (i = 0; i < ibuf_rsrc.num_allocated; i++) { + handle = getHandle(i); + if (!handle->active) { + if (handle->size >= aligned_size) { + handle->active = true; + input_buffer_found = true; + ibuf_rsrc.num_active++; + break; + } + } + } + } + + if (!input_buffer_found) { + /* There were no available handles that fulfilled the + * request. Allocate a new handle with the requested size. + */ + if ((ibuf_rsrc.num_allocated < MAX_IBUF_HANDLES) && + (ibuf_rsrc.free_size >= aligned_size)) { + handle = getHandle(ibuf_rsrc.num_allocated); + handle->start_addr = ibuf_rsrc.free_start_addr; + handle->size = aligned_size; + handle->active = true; + + ibuf_rsrc.free_start_addr += aligned_size; + ibuf_rsrc.free_size -= aligned_size; + ibuf_rsrc.num_active++; + ibuf_rsrc.num_allocated++; + + input_buffer_found = true; + } + } + + if (input_buffer_found && handle) { + *start_addr = handle->start_addr; + retval = true; + } + + return retval; +} + +void ia_css_isys_ibuf_rmgr_release( + uint32_t *start_addr) +{ + u16 i; + ibuf_handle_t *handle = NULL; + + assert(start_addr); + + for (i = 0; i < ibuf_rsrc.num_allocated; i++) { + handle = getHandle(i); + if (handle->active && handle->start_addr == *start_addr) { + handle->active = false; + ibuf_rsrc.num_active--; + break; + } + } +} |