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186 lines
4.6 KiB
186 lines
4.6 KiB
// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) |
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// |
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// This file is provided under a dual BSD/GPLv2 license. When using or |
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// redistributing this file, you may do so under either license. |
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// |
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// Copyright(c) 2018 Intel Corporation. All rights reserved. |
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// |
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// Author: Keyon Jie <[email protected]> |
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// |
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#include <linux/io-64-nonatomic-lo-hi.h> |
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#include <linux/platform_device.h> |
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#include <asm/unaligned.h> |
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#include <sound/soc.h> |
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#include <sound/sof.h> |
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#include "sof-priv.h" |
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#include "ops.h" |
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/* |
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* Register IO |
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* |
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* The sof_io_xyz() wrappers are typically referenced in snd_sof_dsp_ops |
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* structures and cannot be inlined. |
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*/ |
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void sof_io_write(struct snd_sof_dev *sdev, void __iomem *addr, u32 value) |
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{ |
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writel(value, addr); |
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} |
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EXPORT_SYMBOL(sof_io_write); |
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u32 sof_io_read(struct snd_sof_dev *sdev, void __iomem *addr) |
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{ |
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return readl(addr); |
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} |
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EXPORT_SYMBOL(sof_io_read); |
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void sof_io_write64(struct snd_sof_dev *sdev, void __iomem *addr, u64 value) |
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{ |
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writeq(value, addr); |
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} |
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EXPORT_SYMBOL(sof_io_write64); |
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u64 sof_io_read64(struct snd_sof_dev *sdev, void __iomem *addr) |
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{ |
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return readq(addr); |
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} |
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EXPORT_SYMBOL(sof_io_read64); |
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/* |
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* IPC Mailbox IO |
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*/ |
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void sof_mailbox_write(struct snd_sof_dev *sdev, u32 offset, |
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void *message, size_t bytes) |
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{ |
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void __iomem *dest = sdev->bar[sdev->mailbox_bar] + offset; |
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memcpy_toio(dest, message, bytes); |
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} |
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EXPORT_SYMBOL(sof_mailbox_write); |
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void sof_mailbox_read(struct snd_sof_dev *sdev, u32 offset, |
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void *message, size_t bytes) |
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{ |
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void __iomem *src = sdev->bar[sdev->mailbox_bar] + offset; |
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memcpy_fromio(message, src, bytes); |
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} |
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EXPORT_SYMBOL(sof_mailbox_read); |
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/* |
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* Memory copy. |
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*/ |
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int sof_block_write(struct snd_sof_dev *sdev, enum snd_sof_fw_blk_type blk_type, |
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u32 offset, void *src, size_t size) |
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{ |
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int bar = snd_sof_dsp_get_bar_index(sdev, blk_type); |
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const u8 *src_byte = src; |
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void __iomem *dest; |
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u32 affected_mask; |
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u32 tmp; |
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int m, n; |
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if (bar < 0) |
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return bar; |
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dest = sdev->bar[bar] + offset; |
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m = size / 4; |
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n = size % 4; |
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/* __iowrite32_copy use 32bit size values so divide by 4 */ |
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__iowrite32_copy(dest, src, m); |
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if (n) { |
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affected_mask = (1 << (8 * n)) - 1; |
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/* first read the 32bit data of dest, then change affected |
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* bytes, and write back to dest. For unaffected bytes, it |
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* should not be changed |
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*/ |
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tmp = ioread32(dest + m * 4); |
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tmp &= ~affected_mask; |
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tmp |= *(u32 *)(src_byte + m * 4) & affected_mask; |
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iowrite32(tmp, dest + m * 4); |
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} |
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return 0; |
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} |
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EXPORT_SYMBOL(sof_block_write); |
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int sof_block_read(struct snd_sof_dev *sdev, enum snd_sof_fw_blk_type blk_type, |
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u32 offset, void *dest, size_t size) |
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{ |
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int bar = snd_sof_dsp_get_bar_index(sdev, blk_type); |
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if (bar < 0) |
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return bar; |
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memcpy_fromio(dest, sdev->bar[bar] + offset, size); |
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return 0; |
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} |
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EXPORT_SYMBOL(sof_block_read); |
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/* |
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* Generic buffer page table creation. |
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* Take the each physical page address and drop the least significant unused |
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* bits from each (based on PAGE_SIZE). Then pack valid page address bits |
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* into compressed page table. |
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*/ |
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int snd_sof_create_page_table(struct device *dev, |
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struct snd_dma_buffer *dmab, |
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unsigned char *page_table, size_t size) |
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{ |
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int i, pages; |
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pages = snd_sgbuf_aligned_pages(size); |
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dev_dbg(dev, "generating page table for %p size 0x%zx pages %d\n", |
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dmab->area, size, pages); |
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for (i = 0; i < pages; i++) { |
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/* |
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* The number of valid address bits for each page is 20. |
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* idx determines the byte position within page_table |
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* where the current page's address is stored |
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* in the compressed page_table. |
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* This can be calculated by multiplying the page number by 2.5. |
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*/ |
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u32 idx = (5 * i) >> 1; |
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u32 pfn = snd_sgbuf_get_addr(dmab, i * PAGE_SIZE) >> PAGE_SHIFT; |
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u8 *pg_table; |
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dev_vdbg(dev, "pfn i %i idx %d pfn %x\n", i, idx, pfn); |
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pg_table = (u8 *)(page_table + idx); |
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/* |
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* pagetable compression: |
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* byte 0 byte 1 byte 2 byte 3 byte 4 byte 5 |
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* ___________pfn 0__________ __________pfn 1___________ _pfn 2... |
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* .... .... .... .... .... .... .... .... .... .... .... |
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* It is created by: |
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* 1. set current location to 0, PFN index i to 0 |
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* 2. put pfn[i] at current location in Little Endian byte order |
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* 3. calculate an intermediate value as |
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* x = (pfn[i+1] << 4) | (pfn[i] & 0xf) |
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* 4. put x at offset (current location + 2) in LE byte order |
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* 5. increment current location by 5 bytes, increment i by 2 |
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* 6. continue to (2) |
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*/ |
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if (i & 1) |
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put_unaligned_le32((pg_table[0] & 0xf) | pfn << 4, |
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pg_table); |
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else |
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put_unaligned_le32(pfn, pg_table); |
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} |
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return pages; |
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} |
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EXPORT_SYMBOL(snd_sof_create_page_table);
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