/* * PS3 Storage Library * * Copyright (C) 2007 Sony Computer Entertainment Inc. * Copyright 2007 Sony Corp. * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published * by the Free Software Foundation; version 2 of the License. * * 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., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #include <linux/dma-mapping.h> #include <asm/lv1call.h> #include <asm/ps3stor.h> static int ps3stor_probe_access(struct ps3_storage_device *dev) { int res, error; unsigned int i; unsigned long n; if (dev->sbd.match_id == PS3_MATCH_ID_STOR_ROM) { /* special case: CD-ROM is assumed always accessible */ dev->accessible_regions = 1; return 0; } error = -EPERM; for (i = 0; i < dev->num_regions; i++) { dev_dbg(&dev->sbd.core, "%s:%u: checking accessibility of region %u\n", __func__, __LINE__, i); dev->region_idx = i; res = ps3stor_read_write_sectors(dev, dev->bounce_lpar, 0, 1, 0); if (res) { dev_dbg(&dev->sbd.core, "%s:%u: read failed, " "region %u is not accessible\n", __func__, __LINE__, i); continue; } dev_dbg(&dev->sbd.core, "%s:%u: region %u is accessible\n", __func__, __LINE__, i); set_bit(i, &dev->accessible_regions); /* We can access at least one region */ error = 0; } if (error) return error; n = hweight_long(dev->accessible_regions); if (n > 1) dev_info(&dev->sbd.core, "%s:%u: %lu accessible regions found. Only the first " "one will be used\n", __func__, __LINE__, n); dev->region_idx = __ffs(dev->accessible_regions); dev_info(&dev->sbd.core, "First accessible region has index %u start %lu size %lu\n", dev->region_idx, dev->regions[dev->region_idx].start, dev->regions[dev->region_idx].size); return 0; } /** * ps3stor_setup - Setup a storage device before use * @dev: Pointer to a struct ps3_storage_device * @handler: Pointer to an interrupt handler * * Returns 0 for success, or an error code */ int ps3stor_setup(struct ps3_storage_device *dev, irq_handler_t handler) { int error, res, alignment; enum ps3_dma_page_size page_size; error = ps3_open_hv_device(&dev->sbd); if (error) { dev_err(&dev->sbd.core, "%s:%u: ps3_open_hv_device failed %d\n", __func__, __LINE__, error); goto fail; } error = ps3_sb_event_receive_port_setup(&dev->sbd, PS3_BINDING_CPU_ANY, &dev->irq); if (error) { dev_err(&dev->sbd.core, "%s:%u: ps3_sb_event_receive_port_setup failed %d\n", __func__, __LINE__, error); goto fail_close_device; } error = request_irq(dev->irq, handler, IRQF_DISABLED, dev->sbd.core.driver->name, dev); if (error) { dev_err(&dev->sbd.core, "%s:%u: request_irq failed %d\n", __func__, __LINE__, error); goto fail_sb_event_receive_port_destroy; } alignment = min(__ffs(dev->bounce_size), __ffs((unsigned long)dev->bounce_buf)); if (alignment < 12) { dev_err(&dev->sbd.core, "%s:%u: bounce buffer not aligned (%lx at 0x%p)\n", __func__, __LINE__, dev->bounce_size, dev->bounce_buf); error = -EINVAL; goto fail_free_irq; } else if (alignment < 16) page_size = PS3_DMA_4K; else page_size = PS3_DMA_64K; dev->sbd.d_region = &dev->dma_region; ps3_dma_region_init(&dev->sbd, &dev->dma_region, page_size, PS3_DMA_OTHER, dev->bounce_buf, dev->bounce_size); res = ps3_dma_region_create(&dev->dma_region); if (res) { dev_err(&dev->sbd.core, "%s:%u: cannot create DMA region\n", __func__, __LINE__); error = -ENOMEM; goto fail_free_irq; } dev->bounce_lpar = ps3_mm_phys_to_lpar(__pa(dev->bounce_buf)); dev->bounce_dma = dma_map_single(&dev->sbd.core, dev->bounce_buf, dev->bounce_size, DMA_BIDIRECTIONAL); if (!dev->bounce_dma) { dev_err(&dev->sbd.core, "%s:%u: map DMA region failed\n", __func__, __LINE__); error = -ENODEV; goto fail_free_dma; } error = ps3stor_probe_access(dev); if (error) { dev_err(&dev->sbd.core, "%s:%u: No accessible regions found\n", __func__, __LINE__); goto fail_unmap_dma; } return 0; fail_unmap_dma: dma_unmap_single(&dev->sbd.core, dev->bounce_dma, dev->bounce_size, DMA_BIDIRECTIONAL); fail_free_dma: ps3_dma_region_free(&dev->dma_region); fail_free_irq: free_irq(dev->irq, dev); fail_sb_event_receive_port_destroy: ps3_sb_event_receive_port_destroy(&dev->sbd, dev->irq); fail_close_device: ps3_close_hv_device(&dev->sbd); fail: return error; } EXPORT_SYMBOL_GPL(ps3stor_setup); /** * ps3stor_teardown - Tear down a storage device after use * @dev: Pointer to a struct ps3_storage_device */ void ps3stor_teardown(struct ps3_storage_device *dev) { int error; dma_unmap_single(&dev->sbd.core, dev->bounce_dma, dev->bounce_size, DMA_BIDIRECTIONAL); ps3_dma_region_free(&dev->dma_region); free_irq(dev->irq, dev); error = ps3_sb_event_receive_port_destroy(&dev->sbd, dev->irq); if (error) dev_err(&dev->sbd.core, "%s:%u: destroy event receive port failed %d\n", __func__, __LINE__, error); error = ps3_close_hv_device(&dev->sbd); if (error) dev_err(&dev->sbd.core, "%s:%u: ps3_close_hv_device failed %d\n", __func__, __LINE__, error); } EXPORT_SYMBOL_GPL(ps3stor_teardown); /** * ps3stor_read_write_sectors - read/write from/to a storage device * @dev: Pointer to a struct ps3_storage_device * @lpar: HV logical partition address * @start_sector: First sector to read/write * @sectors: Number of sectors to read/write * @write: Flag indicating write (non-zero) or read (zero) * * Returns 0 for success, -1 in case of failure to submit the command, or * an LV1 status value in case of other errors */ u64 ps3stor_read_write_sectors(struct ps3_storage_device *dev, u64 lpar, u64 start_sector, u64 sectors, int write) { unsigned int region_id = dev->regions[dev->region_idx].id; const char *op = write ? "write" : "read"; int res; dev_dbg(&dev->sbd.core, "%s:%u: %s %lu sectors starting at %lu\n", __func__, __LINE__, op, sectors, start_sector); init_completion(&dev->done); res = write ? lv1_storage_write(dev->sbd.dev_id, region_id, start_sector, sectors, 0, lpar, &dev->tag) : lv1_storage_read(dev->sbd.dev_id, region_id, start_sector, sectors, 0, lpar, &dev->tag); if (res) { dev_dbg(&dev->sbd.core, "%s:%u: %s failed %d\n", __func__, __LINE__, op, res); return -1; } wait_for_completion(&dev->done); if (dev->lv1_status) { dev_dbg(&dev->sbd.core, "%s:%u: %s failed 0x%lx\n", __func__, __LINE__, op, dev->lv1_status); return dev->lv1_status; } dev_dbg(&dev->sbd.core, "%s:%u: %s completed\n", __func__, __LINE__, op); return 0; } EXPORT_SYMBOL_GPL(ps3stor_read_write_sectors); /** * ps3stor_send_command - send a device command to a storage device * @dev: Pointer to a struct ps3_storage_device * @cmd: Command number * @arg1: First command argument * @arg2: Second command argument * @arg3: Third command argument * @arg4: Fourth command argument * * Returns 0 for success, -1 in case of failure to submit the command, or * an LV1 status value in case of other errors */ u64 ps3stor_send_command(struct ps3_storage_device *dev, u64 cmd, u64 arg1, u64 arg2, u64 arg3, u64 arg4) { int res; dev_dbg(&dev->sbd.core, "%s:%u: send device command 0x%lx\n", __func__, __LINE__, cmd); init_completion(&dev->done); res = lv1_storage_send_device_command(dev->sbd.dev_id, cmd, arg1, arg2, arg3, arg4, &dev->tag); if (res) { dev_err(&dev->sbd.core, "%s:%u: send_device_command 0x%lx failed %d\n", __func__, __LINE__, cmd, res); return -1; } wait_for_completion(&dev->done); if (dev->lv1_status) { dev_dbg(&dev->sbd.core, "%s:%u: command 0x%lx failed 0x%lx\n", __func__, __LINE__, cmd, dev->lv1_status); return dev->lv1_status; } dev_dbg(&dev->sbd.core, "%s:%u: command 0x%lx completed\n", __func__, __LINE__, cmd); return 0; } EXPORT_SYMBOL_GPL(ps3stor_send_command); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("PS3 Storage Bus Library"); MODULE_AUTHOR("Sony Corporation");