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350 lines
9.0 KiB
350 lines
9.0 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* PS3 Storage Library |
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* |
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* Copyright (C) 2007 Sony Computer Entertainment Inc. |
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* Copyright 2007 Sony Corp. |
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*/ |
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#include <linux/dma-mapping.h> |
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#include <linux/module.h> |
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#include <asm/lv1call.h> |
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#include <asm/ps3stor.h> |
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/* |
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* A workaround for flash memory I/O errors when the internal hard disk |
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* has not been formatted for OtherOS use. Delay disk close until flash |
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* memory is closed. |
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*/ |
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static struct ps3_flash_workaround { |
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int flash_open; |
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int disk_open; |
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struct ps3_system_bus_device *disk_sbd; |
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} ps3_flash_workaround; |
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static int ps3stor_open_hv_device(struct ps3_system_bus_device *sbd) |
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{ |
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int error = ps3_open_hv_device(sbd); |
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if (error) |
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return error; |
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if (sbd->match_id == PS3_MATCH_ID_STOR_FLASH) |
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ps3_flash_workaround.flash_open = 1; |
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if (sbd->match_id == PS3_MATCH_ID_STOR_DISK) |
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ps3_flash_workaround.disk_open = 1; |
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return 0; |
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} |
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static int ps3stor_close_hv_device(struct ps3_system_bus_device *sbd) |
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{ |
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int error; |
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if (sbd->match_id == PS3_MATCH_ID_STOR_DISK |
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&& ps3_flash_workaround.disk_open |
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&& ps3_flash_workaround.flash_open) { |
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ps3_flash_workaround.disk_sbd = sbd; |
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return 0; |
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} |
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error = ps3_close_hv_device(sbd); |
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if (error) |
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return error; |
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if (sbd->match_id == PS3_MATCH_ID_STOR_DISK) |
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ps3_flash_workaround.disk_open = 0; |
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if (sbd->match_id == PS3_MATCH_ID_STOR_FLASH) { |
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ps3_flash_workaround.flash_open = 0; |
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if (ps3_flash_workaround.disk_sbd) { |
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ps3_close_hv_device(ps3_flash_workaround.disk_sbd); |
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ps3_flash_workaround.disk_open = 0; |
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ps3_flash_workaround.disk_sbd = NULL; |
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} |
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} |
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return 0; |
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} |
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static int ps3stor_probe_access(struct ps3_storage_device *dev) |
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{ |
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int res, error; |
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unsigned int i; |
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unsigned long n; |
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if (dev->sbd.match_id == PS3_MATCH_ID_STOR_ROM) { |
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/* special case: CD-ROM is assumed always accessible */ |
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dev->accessible_regions = 1; |
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return 0; |
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} |
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error = -EPERM; |
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for (i = 0; i < dev->num_regions; i++) { |
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dev_dbg(&dev->sbd.core, |
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"%s:%u: checking accessibility of region %u\n", |
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__func__, __LINE__, i); |
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dev->region_idx = i; |
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res = ps3stor_read_write_sectors(dev, dev->bounce_lpar, 0, 1, |
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0); |
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if (res) { |
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dev_dbg(&dev->sbd.core, "%s:%u: read failed, " |
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"region %u is not accessible\n", __func__, |
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__LINE__, i); |
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continue; |
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} |
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dev_dbg(&dev->sbd.core, "%s:%u: region %u is accessible\n", |
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__func__, __LINE__, i); |
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set_bit(i, &dev->accessible_regions); |
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/* We can access at least one region */ |
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error = 0; |
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} |
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if (error) |
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return error; |
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n = hweight_long(dev->accessible_regions); |
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if (n > 1) |
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dev_info(&dev->sbd.core, |
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"%s:%u: %lu accessible regions found. Only the first " |
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"one will be used\n", |
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__func__, __LINE__, n); |
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dev->region_idx = __ffs(dev->accessible_regions); |
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dev_info(&dev->sbd.core, |
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"First accessible region has index %u start %llu size %llu\n", |
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dev->region_idx, dev->regions[dev->region_idx].start, |
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dev->regions[dev->region_idx].size); |
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return 0; |
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} |
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/** |
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* ps3stor_setup - Setup a storage device before use |
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* @dev: Pointer to a struct ps3_storage_device |
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* @handler: Pointer to an interrupt handler |
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* |
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* Returns 0 for success, or an error code |
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*/ |
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int ps3stor_setup(struct ps3_storage_device *dev, irq_handler_t handler) |
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{ |
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int error, res, alignment; |
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enum ps3_dma_page_size page_size; |
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error = ps3stor_open_hv_device(&dev->sbd); |
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if (error) { |
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dev_err(&dev->sbd.core, |
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"%s:%u: ps3_open_hv_device failed %d\n", __func__, |
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__LINE__, error); |
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goto fail; |
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} |
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error = ps3_sb_event_receive_port_setup(&dev->sbd, PS3_BINDING_CPU_ANY, |
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&dev->irq); |
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if (error) { |
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dev_err(&dev->sbd.core, |
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"%s:%u: ps3_sb_event_receive_port_setup failed %d\n", |
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__func__, __LINE__, error); |
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goto fail_close_device; |
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} |
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error = request_irq(dev->irq, handler, 0, |
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dev->sbd.core.driver->name, dev); |
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if (error) { |
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dev_err(&dev->sbd.core, "%s:%u: request_irq failed %d\n", |
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__func__, __LINE__, error); |
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goto fail_sb_event_receive_port_destroy; |
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} |
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alignment = min(__ffs(dev->bounce_size), |
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__ffs((unsigned long)dev->bounce_buf)); |
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if (alignment < 12) { |
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dev_err(&dev->sbd.core, |
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"%s:%u: bounce buffer not aligned (%lx at 0x%p)\n", |
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__func__, __LINE__, dev->bounce_size, dev->bounce_buf); |
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error = -EINVAL; |
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goto fail_free_irq; |
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} else if (alignment < 16) |
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page_size = PS3_DMA_4K; |
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else |
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page_size = PS3_DMA_64K; |
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dev->sbd.d_region = &dev->dma_region; |
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ps3_dma_region_init(&dev->sbd, &dev->dma_region, page_size, |
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PS3_DMA_OTHER, dev->bounce_buf, dev->bounce_size); |
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res = ps3_dma_region_create(&dev->dma_region); |
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if (res) { |
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dev_err(&dev->sbd.core, "%s:%u: cannot create DMA region\n", |
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__func__, __LINE__); |
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error = -ENOMEM; |
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goto fail_free_irq; |
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} |
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dev->bounce_lpar = ps3_mm_phys_to_lpar(__pa(dev->bounce_buf)); |
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dev->bounce_dma = dma_map_single(&dev->sbd.core, dev->bounce_buf, |
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dev->bounce_size, DMA_BIDIRECTIONAL); |
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if (dma_mapping_error(&dev->sbd.core, dev->bounce_dma)) { |
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dev_err(&dev->sbd.core, "%s:%u: map DMA region failed\n", |
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__func__, __LINE__); |
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error = -ENODEV; |
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goto fail_free_dma; |
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} |
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error = ps3stor_probe_access(dev); |
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if (error) { |
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dev_err(&dev->sbd.core, "%s:%u: No accessible regions found\n", |
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__func__, __LINE__); |
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goto fail_unmap_dma; |
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} |
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return 0; |
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fail_unmap_dma: |
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dma_unmap_single(&dev->sbd.core, dev->bounce_dma, dev->bounce_size, |
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DMA_BIDIRECTIONAL); |
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fail_free_dma: |
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ps3_dma_region_free(&dev->dma_region); |
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fail_free_irq: |
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free_irq(dev->irq, dev); |
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fail_sb_event_receive_port_destroy: |
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ps3_sb_event_receive_port_destroy(&dev->sbd, dev->irq); |
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fail_close_device: |
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ps3stor_close_hv_device(&dev->sbd); |
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fail: |
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return error; |
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} |
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EXPORT_SYMBOL_GPL(ps3stor_setup); |
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/** |
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* ps3stor_teardown - Tear down a storage device after use |
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* @dev: Pointer to a struct ps3_storage_device |
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*/ |
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void ps3stor_teardown(struct ps3_storage_device *dev) |
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{ |
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int error; |
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dma_unmap_single(&dev->sbd.core, dev->bounce_dma, dev->bounce_size, |
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DMA_BIDIRECTIONAL); |
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ps3_dma_region_free(&dev->dma_region); |
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free_irq(dev->irq, dev); |
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error = ps3_sb_event_receive_port_destroy(&dev->sbd, dev->irq); |
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if (error) |
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dev_err(&dev->sbd.core, |
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"%s:%u: destroy event receive port failed %d\n", |
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__func__, __LINE__, error); |
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error = ps3stor_close_hv_device(&dev->sbd); |
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if (error) |
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dev_err(&dev->sbd.core, |
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"%s:%u: ps3_close_hv_device failed %d\n", __func__, |
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__LINE__, error); |
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} |
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EXPORT_SYMBOL_GPL(ps3stor_teardown); |
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/** |
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* ps3stor_read_write_sectors - read/write from/to a storage device |
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* @dev: Pointer to a struct ps3_storage_device |
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* @lpar: HV logical partition address |
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* @start_sector: First sector to read/write |
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* @sectors: Number of sectors to read/write |
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* @write: Flag indicating write (non-zero) or read (zero) |
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* |
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* Returns 0 for success, -1 in case of failure to submit the command, or |
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* an LV1 status value in case of other errors |
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*/ |
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u64 ps3stor_read_write_sectors(struct ps3_storage_device *dev, u64 lpar, |
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u64 start_sector, u64 sectors, int write) |
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{ |
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unsigned int region_id = dev->regions[dev->region_idx].id; |
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const char *op = write ? "write" : "read"; |
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int res; |
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dev_dbg(&dev->sbd.core, "%s:%u: %s %llu sectors starting at %llu\n", |
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__func__, __LINE__, op, sectors, start_sector); |
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init_completion(&dev->done); |
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res = write ? lv1_storage_write(dev->sbd.dev_id, region_id, |
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start_sector, sectors, 0, lpar, |
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&dev->tag) |
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: lv1_storage_read(dev->sbd.dev_id, region_id, |
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start_sector, sectors, 0, lpar, |
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&dev->tag); |
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if (res) { |
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dev_dbg(&dev->sbd.core, "%s:%u: %s failed %d\n", __func__, |
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__LINE__, op, res); |
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return -1; |
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} |
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wait_for_completion(&dev->done); |
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if (dev->lv1_status) { |
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dev_dbg(&dev->sbd.core, "%s:%u: %s failed 0x%llx\n", __func__, |
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__LINE__, op, dev->lv1_status); |
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return dev->lv1_status; |
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} |
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dev_dbg(&dev->sbd.core, "%s:%u: %s completed\n", __func__, __LINE__, |
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op); |
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return 0; |
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} |
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EXPORT_SYMBOL_GPL(ps3stor_read_write_sectors); |
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/** |
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* ps3stor_send_command - send a device command to a storage device |
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* @dev: Pointer to a struct ps3_storage_device |
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* @cmd: Command number |
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* @arg1: First command argument |
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* @arg2: Second command argument |
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* @arg3: Third command argument |
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* @arg4: Fourth command argument |
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* |
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* Returns 0 for success, -1 in case of failure to submit the command, or |
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* an LV1 status value in case of other errors |
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*/ |
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u64 ps3stor_send_command(struct ps3_storage_device *dev, u64 cmd, u64 arg1, |
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u64 arg2, u64 arg3, u64 arg4) |
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{ |
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int res; |
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dev_dbg(&dev->sbd.core, "%s:%u: send device command 0x%llx\n", __func__, |
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__LINE__, cmd); |
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init_completion(&dev->done); |
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res = lv1_storage_send_device_command(dev->sbd.dev_id, cmd, arg1, |
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arg2, arg3, arg4, &dev->tag); |
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if (res) { |
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dev_err(&dev->sbd.core, |
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"%s:%u: send_device_command 0x%llx failed %d\n", |
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__func__, __LINE__, cmd, res); |
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return -1; |
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} |
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wait_for_completion(&dev->done); |
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if (dev->lv1_status) { |
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dev_dbg(&dev->sbd.core, "%s:%u: command 0x%llx failed 0x%llx\n", |
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__func__, __LINE__, cmd, dev->lv1_status); |
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return dev->lv1_status; |
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} |
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dev_dbg(&dev->sbd.core, "%s:%u: command 0x%llx completed\n", __func__, |
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__LINE__, cmd); |
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return 0; |
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} |
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EXPORT_SYMBOL_GPL(ps3stor_send_command); |
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MODULE_LICENSE("GPL"); |
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MODULE_DESCRIPTION("PS3 Storage Bus Library"); |
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MODULE_AUTHOR("Sony Corporation");
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