| 0,0 → 1,308 |
|---|
| /* |
| * Copyright (c) 2009 Jiri Svoboda |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * - The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /** @addtogroup bd |
| * @{ |
| */ |
| |
| /** |
| * @file |
| * @brief GXemul disk driver |
| */ |
| |
| #include <stdio.h> |
| #include <libarch/ddi.h> |
| #include <ddi.h> |
| #include <ipc/ipc.h> |
| #include <ipc/bd.h> |
| #include <async.h> |
| #include <as.h> |
| #include <fibril_sync.h> |
| #include <devmap.h> |
| #include <sys/types.h> |
| #include <errno.h> |
| |
| #define NAME "gxe_bd" |
| |
| enum { |
| CTL_READ_START = 0, |
| CTL_WRITE_START = 1, |
| }; |
| |
| enum { |
| STATUS_FAILURE = 0 |
| }; |
| |
| enum { |
| MAX_DISKS = 2 |
| }; |
| |
| typedef struct { |
| uint32_t offset_lo; |
| uint32_t pad0; |
| uint32_t offset_hi; |
| uint32_t pad1; |
| |
| uint32_t disk_id; |
| uint32_t pad2[3]; |
| |
| uint32_t control; |
| uint32_t pad3[3]; |
| |
| uint32_t status; |
| |
| uint32_t pad4[3]; |
| uint8_t pad5[0x3fc0]; |
| |
| uint8_t buffer[512]; |
| } gxe_bd_t; |
| |
| |
| static const size_t block_size = 512; |
| static size_t comm_size; |
| |
| static uintptr_t dev_physical = 0x13000000; |
| static gxe_bd_t *dev; |
| |
| static dev_handle_t dev_handle[MAX_DISKS]; |
| |
| static fibril_mutex_t dev_lock[MAX_DISKS]; |
| |
| static int gxe_bd_init(void); |
| static void gxe_bd_connection(ipc_callid_t iid, ipc_call_t *icall); |
| static int gx_bd_rdwr(int disk_id, ipcarg_t method, off_t offset, size_t size, |
| void *buf); |
| static int gxe_bd_read_block(int disk_id, uint64_t offset, size_t size, |
| void *buf); |
| static int gxe_bd_write_block(int disk_id, uint64_t offset, size_t size, |
| const void *buf); |
| |
| int main(int argc, char **argv) |
| { |
| printf(NAME ": GXemul disk driver\n"); |
| |
| if (gxe_bd_init() != EOK) |
| return -1; |
| |
| printf(NAME ": Accepting connections\n"); |
| async_manager(); |
| |
| /* Not reached */ |
| return 0; |
| } |
| |
| static int gxe_bd_init(void) |
| { |
| void *vaddr; |
| int rc, i; |
| char name[16]; |
| |
| rc = devmap_driver_register(NAME, gxe_bd_connection); |
| if (rc < 0) { |
| printf(NAME ": Unable to register driver.\n"); |
| return rc; |
| } |
| |
| rc = pio_enable((void *) dev_physical, sizeof(gxe_bd_t), &vaddr); |
| if (rc != EOK) { |
| printf(NAME ": Could not initialize device I/O space.\n"); |
| return rc; |
| } |
| |
| dev = vaddr; |
| |
| for (i = 0; i < MAX_DISKS; i++) { |
| snprintf(name, 16, "disk%d", i); |
| rc = devmap_device_register(name, &dev_handle[i]); |
| if (rc != EOK) { |
| devmap_hangup_phone(DEVMAP_DRIVER); |
| printf(NAME ": Unable to register device %s.\n", |
| name); |
| return rc; |
| } |
| fibril_mutex_initialize(&dev_lock[i]); |
| } |
| |
| return EOK; |
| } |
| |
| static void gxe_bd_connection(ipc_callid_t iid, ipc_call_t *icall) |
| { |
| void *fs_va = NULL; |
| ipc_callid_t callid; |
| ipc_call_t call; |
| ipcarg_t method; |
| dev_handle_t dh; |
| int flags; |
| int retval; |
| off_t idx; |
| size_t size; |
| int disk_id, i; |
| |
| /* Get the device handle. */ |
| dh = IPC_GET_ARG1(*icall); |
| |
| /* Determine which disk device is the client connecting to. */ |
| disk_id = -1; |
| for (i = 0; i < MAX_DISKS; i++) |
| if (dev_handle[i] == dh) |
| disk_id = i; |
| |
| if (disk_id < 0) { |
| ipc_answer_0(iid, EINVAL); |
| return; |
| } |
| |
| /* Answer the IPC_M_CONNECT_ME_TO call. */ |
| ipc_answer_0(iid, EOK); |
| |
| if (!ipc_share_out_receive(&callid, &comm_size, &flags)) { |
| ipc_answer_0(callid, EHANGUP); |
| return; |
| } |
| |
| fs_va = as_get_mappable_page(comm_size); |
| if (fs_va == NULL) { |
| ipc_answer_0(callid, EHANGUP); |
| return; |
| } |
| |
| (void) ipc_share_out_finalize(callid, fs_va); |
| |
| while (1) { |
| callid = async_get_call(&call); |
| method = IPC_GET_METHOD(call); |
| switch (method) { |
| case IPC_M_PHONE_HUNGUP: |
| /* The other side has hung up. */ |
| ipc_answer_0(callid, EOK); |
| return; |
| case BD_READ_BLOCK: |
| case BD_WRITE_BLOCK: |
| idx = IPC_GET_ARG1(call); |
| size = IPC_GET_ARG2(call); |
| if (size > comm_size) { |
| retval = EINVAL; |
| break; |
| } |
| retval = gx_bd_rdwr(disk_id, method, idx * size, |
| size, fs_va); |
| break; |
| default: |
| retval = EINVAL; |
| break; |
| } |
| ipc_answer_0(callid, retval); |
| } |
| } |
| |
| static int gx_bd_rdwr(int disk_id, ipcarg_t method, off_t offset, size_t size, |
| void *buf) |
| { |
| int rc; |
| size_t now; |
| |
| while (size > 0) { |
| now = size < block_size ? size : block_size; |
| |
| if (method == BD_READ_BLOCK) |
| rc = gxe_bd_read_block(disk_id, offset, now, buf); |
| else |
| rc = gxe_bd_write_block(disk_id, offset, now, buf); |
| |
| if (rc != EOK) |
| return rc; |
| |
| buf += block_size; |
| offset += block_size; |
| |
| if (size > block_size) |
| size -= block_size; |
| else |
| size = 0; |
| } |
| |
| return EOK; |
| } |
| |
| static int gxe_bd_read_block(int disk_id, uint64_t offset, size_t size, |
| void *buf) |
| { |
| uint32_t status; |
| size_t i; |
| uint32_t w; |
| |
| fibril_mutex_lock(&dev_lock[disk_id]); |
| pio_write_32(&dev->offset_lo, (uint32_t) offset); |
| pio_write_32(&dev->offset_hi, offset >> 32); |
| pio_write_32(&dev->disk_id, disk_id); |
| pio_write_32(&dev->control, CTL_READ_START); |
| |
| status = pio_read_32(&dev->status); |
| if (status == STATUS_FAILURE) { |
| fibril_mutex_unlock(&dev_lock[disk_id]); |
| return EIO; |
| } |
| |
| for (i = 0; i < size; i++) { |
| ((uint8_t *) buf)[i] = w = pio_read_8(&dev->buffer[i]); |
| } |
| |
| fibril_mutex_unlock(&dev_lock[disk_id]); |
| return EOK; |
| } |
| |
| static int gxe_bd_write_block(int disk_id, uint64_t offset, size_t size, |
| const void *buf) |
| { |
| uint32_t status; |
| size_t i; |
| |
| for (i = 0; i < size; i++) { |
| pio_write_8(&dev->buffer[i], ((const uint8_t *) buf)[i]); |
| } |
| |
| fibril_mutex_lock(&dev_lock[disk_id]); |
| pio_write_32(&dev->offset_lo, (uint32_t) offset); |
| pio_write_32(&dev->offset_hi, offset >> 32); |
| pio_write_32(&dev->disk_id, disk_id); |
| pio_write_32(&dev->control, CTL_WRITE_START); |
| |
| status = pio_read_32(&dev->status); |
| if (status == STATUS_FAILURE) { |
| fibril_mutex_unlock(&dev_lock[disk_id]); |
| return EIO; |
| } |
| |
| fibril_mutex_unlock(&dev_lock[disk_id]); |
| return EOK; |
| } |
| |
| /** |
| * @} |
| */ |