WebSVN – HelenOS – Diff – /branches/network/uspace/srv/bd/ata_bd/ata_bd.c


/*
 * 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 ATA disk driver
 *
 * This driver currently works only with CHS addressing and uses PIO.
 * Currently based on the (now obsolete) ANSI X3.221-1994 (ATA-1) standard.
 * At this point only reading is possible, not writing.
 *
 * The driver services a single controller which can have up to two disks
 * attached.
 */
 
#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>
#include <bool.h>
#include <task.h>
 
#include "ata_bd.h"
 
#define NAME "ata_bd"
 
static const size_t block_size = 512;
static size_t comm_size;
 
static uintptr_t cmd_physical = 0x1f0;
static uintptr_t ctl_physical = 0x170;
static ata_cmd_t *cmd;
static ata_ctl_t *ctl;
 
/** Per-disk state. */
static disk_t disk[MAX_DISKS];
 
static int ata_bd_init(void);
static void ata_bd_connection(ipc_callid_t iid, ipc_call_t *icall);
static int ata_bd_rdwr(int disk_id, ipcarg_t method, off_t offset, size_t size,
    void *buf);
static int ata_bd_read_block(int disk_id, uint64_t blk_idx, size_t blk_cnt,
    void *buf);
static int ata_bd_write_block(int disk_id, uint64_t blk_idx, size_t blk_cnt,
    const void *buf);
static int drive_identify(int drive_id, disk_t *d);
 
int main(int argc, char **argv)
{
    uint8_t status;
    char name[16];
    int i, rc;
    int n_disks;
 
    printf(NAME ": ATA disk driver\n");
 
    printf("I/O address 0x%x\n", cmd_physical);
 
    if (ata_bd_init() != EOK)
        return -1;
 
    /* Put drives to reset, disable interrupts. */
    printf("Reset drives... ");
    fflush(stdout);
 
    pio_write_8(&ctl->device_control, DCR_SRST);
    /* FIXME: Find out how to do this properly. */
    async_usleep(100);
    pio_write_8(&ctl->device_control, 0);
 
    do {
        status = pio_read_8(&cmd->status);
    } while ((status & SR_BSY) != 0);
    printf("Done\n");
 
 
 
    (void) drive_identify(0, &disk[0]);
    (void) drive_identify(1, &disk[1]);
 
    n_disks = 0;
 
    for (i = 0; i < MAX_DISKS; i++) {
        /* Skip unattached drives. */
        if (disk[i].present == false)
            continue;
 
        snprintf(name, 16, "disk%d", i);
        rc = devmap_device_register(name, &disk[i].dev_handle);
        if (rc != EOK) {
            devmap_hangup_phone(DEVMAP_DRIVER);
            printf(NAME ": Unable to register device %s.\n",
                name);
            return rc;
        }
        ++n_disks;
    }
 
    if (n_disks == 0) {
        printf("No disks detected.\n");
        return -1;
    }
 
    printf(NAME ": Accepting connections\n");
    task_retval(0);
    async_manager();
 
    /* Not reached */
    return 0;
}
 
static int drive_identify(int disk_id, disk_t *d)
{
    uint16_t data;
    uint8_t status;
    size_t i;
 
    printf("Identify drive %d... ", disk_id);
    fflush(stdout);
 
    pio_write_8(&cmd->drive_head, ((disk_id != 0) ? DHR_DRV : 0));
    async_usleep(100);
    pio_write_8(&cmd->command, CMD_IDENTIFY_DRIVE);
 
    status = pio_read_8(&cmd->status);
 
 
    d->present = false;
 
    /*
     * Detect if drive is present. This is Qemu only! Need to
     * do the right thing to work with real drives.
     */
    if ((status & SR_DRDY) == 0) {
        printf("None attached.\n");
        return ENOENT;
    }
 
    for (i = 0; i < block_size / 2; i++) {
        do {
            status = pio_read_8(&cmd->status);
        } while ((status & SR_DRDY) == 0);
 
        data = pio_read_16(&cmd->data_port);
 
        switch (i) {
        case 1: d->cylinders = data; break;
        case 3: d->heads = data; break;
        case 6: d->sectors = data; break;
        }
    }
 
    d->blocks = d->cylinders * d->heads * d->sectors;
 
    printf("Geometry: %u cylinders, %u heads, %u sectors\n",
        d->cylinders, d->heads, d->sectors);
 
    d->present = true;
    fibril_mutex_initialize(&d->lock);
 
    return EOK;
}
 
static int ata_bd_init(void)
{
    void *vaddr;
    int rc;
 
    rc = devmap_driver_register(NAME, ata_bd_connection);
    if (rc < 0) {
        printf(NAME ": Unable to register driver.\n");
        return rc;
    }
 
    rc = pio_enable((void *) cmd_physical, sizeof(ata_cmd_t), &vaddr);
    if (rc != EOK) {
        printf(NAME ": Could not initialize device I/O space.\n");
        return rc;
    }
 
    cmd = vaddr;
 
    rc = pio_enable((void *) ctl_physical, sizeof(ata_ctl_t), &vaddr);
    if (rc != EOK) {
        printf(NAME ": Could not initialize device I/O space.\n");
        return rc;
    }
 
    ctl = vaddr;
 
 
    return EOK;
}
 
static void ata_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 (disk[i].dev_handle == dh)
            disk_id = i;
 
    if (disk_id < 0 || disk[disk_id].present == false) {
        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 = ata_bd_rdwr(disk_id, method, idx,
                size, fs_va);
            break;
        default:
            retval = EINVAL;
            break;
        }
        ipc_answer_0(callid, retval);
    }
}
 
static int ata_bd_rdwr(int disk_id, ipcarg_t method, off_t blk_idx, size_t size,
    void *buf)
{
    int rc;
    size_t now;
 
    while (size > 0) {
        now = size < block_size ? size : block_size;
        if (now != block_size)
            return EINVAL;
 
        if (method == BD_READ_BLOCK)
            rc = ata_bd_read_block(disk_id, blk_idx, 1, buf);
        else
            rc = ata_bd_write_block(disk_id, blk_idx, 1, buf);
 
        if (rc != EOK)
            return rc;
 
        buf += block_size;
        blk_idx++;
 
        if (size > block_size)
            size -= block_size;
        else
            size = 0;
    }
 
    return EOK;
}
 
 
static int ata_bd_read_block(int disk_id, uint64_t blk_idx, size_t blk_cnt,
    void *buf)
{
    size_t i;
    uint16_t data;
    uint8_t status;
    uint64_t c, h, s;
    uint64_t idx;
    uint8_t drv_head;
    disk_t *d;
 
    d = &disk[disk_id];
 
    /* Check device bounds. */
    if (blk_idx >= d->blocks)
        return EINVAL;
 
    /* Compute CHS. */
    c = blk_idx / (d->heads * d->sectors);
    idx = blk_idx % (d->heads * d->sectors);
 
    h = idx / d->sectors;
    s = 1 + (idx % d->sectors);
 
    /* New value for Drive/Head register */
    drv_head =
        ((disk_id != 0) ? DHR_DRV : 0) |
        (h & 0x0f);
 
    fibril_mutex_lock(&d->lock);
 
    /* Program a Read Sectors operation. */
 
    pio_write_8(&cmd->drive_head, drv_head);
    pio_write_8(&cmd->sector_count, 1);
    pio_write_8(&cmd->sector_number, s);
    pio_write_8(&cmd->cylinder_low, c & 0xff);
    pio_write_8(&cmd->cylinder_high, c >> 16);
    pio_write_8(&cmd->command, CMD_READ_SECTORS);
 
    /* Read data from the disk buffer. */
 
    for (i = 0; i < block_size / 2; i++) {
        do {
            status = pio_read_8(&cmd->status);
        } while ((status & SR_DRDY) == 0);
 
        data = pio_read_16(&cmd->data_port);
        ((uint16_t *) buf)[i] = data;
    }
 
    fibril_mutex_unlock(&d->lock);
    return EOK;
}
 
static int ata_bd_write_block(int disk_id, uint64_t blk_idx, size_t blk_cnt,
    const void *buf)
{
    size_t i;
    uint8_t status;
    uint64_t c, h, s;
    uint64_t idx;
    uint8_t drv_head;
    disk_t *d;
 
    d = &disk[disk_id];
 
    /* Check device bounds. */
    if (blk_idx >= d->blocks)
        return EINVAL;
 
    /* Compute CHS. */
    c = blk_idx / (d->heads * d->sectors);
    idx = blk_idx % (d->heads * d->sectors);
 
    h = idx / d->sectors;
    s = 1 + (idx % d->sectors);
 
    /* New value for Drive/Head register */
    drv_head =
        ((disk_id != 0) ? DHR_DRV : 0) |
        (h & 0x0f);
 
    fibril_mutex_lock(&d->lock);
 
    /* Program a Read Sectors operation. */
 
    pio_write_8(&cmd->drive_head, drv_head);
    pio_write_8(&cmd->sector_count, 1);
    pio_write_8(&cmd->sector_number, s);
    pio_write_8(&cmd->cylinder_low, c & 0xff);
    pio_write_8(&cmd->cylinder_high, c >> 16);
    pio_write_8(&cmd->command, CMD_WRITE_SECTORS);
 
    /* Write data to the disk buffer. */
 
    for (i = 0; i < block_size / 2; i++) {
        do {
            status = pio_read_8(&cmd->status);
        } while ((status & SR_DRDY) == 0);
 
        pio_write_16(&cmd->data_port, ((uint16_t *) buf)[i]);
    }
 
    fibril_mutex_unlock(&d->lock);
    return EOK;
}
 
 
/**
 * @}
 */
 

Rev 4581	Rev 4718
1	/*	1	/*
2	* Copyright (c) 2009 Jiri Svoboda	2	* Copyright (c) 2009 Jiri Svoboda
3	* All rights reserved.	3	* All rights reserved.
4	*	4	*
5	* Redistribution and use in source and binary forms, with or without	5	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions	6	* modification, are permitted provided that the following conditions
7	* are met:	7	* are met:
8	*	8	*
9	* - Redistributions of source code must retain the above copyright	9	* - Redistributions of source code must retain the above copyright
10	* notice, this list of conditions and the following disclaimer.	10	* notice, this list of conditions and the following disclaimer.
11	* - Redistributions in binary form must reproduce the above copyright	11	* - Redistributions in binary form must reproduce the above copyright
12	* notice, this list of conditions and the following disclaimer in the	12	* notice, this list of conditions and the following disclaimer in the
13	* documentation and/or other materials provided with the distribution.	13	* documentation and/or other materials provided with the distribution.
14	* - The name of the author may not be used to endorse or promote products	14	* - The name of the author may not be used to endorse or promote products
15	* derived from this software without specific prior written permission.	15	* derived from this software without specific prior written permission.
16	*	16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES	18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF	25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27	*/	27	*/
28		28
29	/** @addtogroup bd	29	/** @addtogroup bd
30	* @{	30	* @{
31	*/	31	*/
32		32
33	/**	33	/**
34	* @file	34	* @file
35	* @brief ATA disk driver	35	* @brief ATA disk driver
36	*	36	*
37	* This driver currently works only with CHS addressing and uses PIO.	37	* This driver currently works only with CHS addressing and uses PIO.
38	* Currently based on the (now obsolete) ANSI X3.221-1994 (ATA-1) standard.	38	* Currently based on the (now obsolete) ANSI X3.221-1994 (ATA-1) standard.
39	* At this point only reading is possible, not writing.	39	* At this point only reading is possible, not writing.
40	*	40	*
41	* The driver services a single controller which can have up to two disks	41	* The driver services a single controller which can have up to two disks
42	* attached.	42	* attached.
43	*/	43	*/
44		44
45	#include <stdio.h>	45	#include <stdio.h>
46	#include <libarch/ddi.h>	46	#include <libarch/ddi.h>
47	#include <ddi.h>	47	#include <ddi.h>
48	#include <ipc/ipc.h>	48	#include <ipc/ipc.h>
49	#include <ipc/bd.h>	49	#include <ipc/bd.h>
50	#include <async.h>	50	#include <async.h>
51	#include <as.h>	51	#include <as.h>
52	#include <fibril_sync.h>	52	#include <fibril_sync.h>
53	#include <devmap.h>	53	#include <devmap.h>
54	#include <sys/types.h>	54	#include <sys/types.h>
55	#include <errno.h>	55	#include <errno.h>
56	#include <bool.h>	56	#include <bool.h>
-		57	#include <task.h>
57		58
58	#include "ata_bd.h"	59	#include "ata_bd.h"
59		60
60	#define NAME "ata_bd"	61	#define NAME "ata_bd"
61		62
62	static const size_t block_size = 512;	63	static const size_t block_size = 512;
63	static size_t comm_size;	64	static size_t comm_size;
64		65
65	static uintptr_t cmd_physical = 0x1f0;	66	static uintptr_t cmd_physical = 0x1f0;
66	static uintptr_t ctl_physical = 0x170;	67	static uintptr_t ctl_physical = 0x170;
67	static ata_cmd_t *cmd;	68	static ata_cmd_t *cmd;
68	static ata_ctl_t *ctl;	69	static ata_ctl_t *ctl;
69		70
70	/** Per-disk state. */	71	/** Per-disk state. */
71	static disk_t disk[MAX_DISKS];	72	static disk_t disk[MAX_DISKS];
72		73
73	static int ata_bd_init(void);	74	static int ata_bd_init(void);
74	static void ata_bd_connection(ipc_callid_t iid, ipc_call_t *icall);	75	static void ata_bd_connection(ipc_callid_t iid, ipc_call_t *icall);
75	static int ata_bd_rdwr(int disk_id, ipcarg_t method, off_t offset, size_t size,	76	static int ata_bd_rdwr(int disk_id, ipcarg_t method, off_t offset, size_t size,
76	void *buf);	77	void *buf);
77	static int ata_bd_read_block(int disk_id, uint64_t blk_idx, size_t blk_cnt,	78	static int ata_bd_read_block(int disk_id, uint64_t blk_idx, size_t blk_cnt,
78	void *buf);	79	void *buf);
79	static int ata_bd_write_block(int disk_id, uint64_t blk_idx, size_t blk_cnt,	80	static int ata_bd_write_block(int disk_id, uint64_t blk_idx, size_t blk_cnt,
80	const void *buf);	81	const void *buf);
81	static int drive_identify(int drive_id, disk_t *d);	82	static int drive_identify(int drive_id, disk_t *d);
82		83
83	int main(int argc, char **argv)	84	int main(int argc, char **argv)
84	{	85	{
85	uint8_t status;	86	uint8_t status;
86	char name[16];	87	char name[16];
87	int i, rc;	88	int i, rc;
88	int n_disks;	89	int n_disks;
89		90
90	printf(NAME ": ATA disk driver\n");	91	printf(NAME ": ATA disk driver\n");
91		92
92	printf("I/O address 0x%x\n", cmd_physical);	93	printf("I/O address 0x%x\n", cmd_physical);
93		94
94	if (ata_bd_init() != EOK)	95	if (ata_bd_init() != EOK)
95	return -1;	96	return -1;
96		97
97	/* Put drives to reset, disable interrupts. */	98	/* Put drives to reset, disable interrupts. */
98	printf("Reset drives...\n");	99	printf("Reset drives... ");
-		100	fflush(stdout);
-		101
99	pio_write_8(&ctl->device_control, DCR_SRST);	102	pio_write_8(&ctl->device_control, DCR_SRST);
100	/* FIXME: Find out how to do this properly. */	103	/* FIXME: Find out how to do this properly. */
101	async_usleep(100);	104	async_usleep(100);
102	pio_write_8(&ctl->device_control, 0);	105	pio_write_8(&ctl->device_control, 0);
103		106
104	do {	107	do {
105	status = pio_read_8(&cmd->status);	108	status = pio_read_8(&cmd->status);
106	} while ((status & SR_BSY) != 0);	109	} while ((status & SR_BSY) != 0);
107	printf("Done\n");	110	printf("Done\n");
108		111
109	printf("Status = 0x%x\n", pio_read_8(&cmd->status));	-
110		-
111	(void) drive_identify(0, &disk[0]);	112	(void) drive_identify(0, &disk[0]);
112	(void) drive_identify(1, &disk[1]);	113	(void) drive_identify(1, &disk[1]);
113		114
114	n_disks = 0;	115	n_disks = 0;
115		116
116	for (i = 0; i < MAX_DISKS; i++) {	117	for (i = 0; i < MAX_DISKS; i++) {
117	/* Skip unattached drives. */	118	/* Skip unattached drives. */
118	if (disk[i].present == false)	119	if (disk[i].present == false)
119	continue;	120	continue;
120		121
121	snprintf(name, 16, "disk%d", i);	122	snprintf(name, 16, "disk%d", i);
122	rc = devmap_device_register(name, &disk[i].dev_handle);	123	rc = devmap_device_register(name, &disk[i].dev_handle);
123	if (rc != EOK) {	124	if (rc != EOK) {
124	devmap_hangup_phone(DEVMAP_DRIVER);	125	devmap_hangup_phone(DEVMAP_DRIVER);
125	printf(NAME ": Unable to register device %s.\n",	126	printf(NAME ": Unable to register device %s.\n",
126	name);	127	name);
127	return rc;	128	return rc;
128	}	129	}
129	++n_disks;	130	++n_disks;
130	}	131	}
131		132
132	if (n_disks == 0) {	133	if (n_disks == 0) {
133	printf("No disks detected.\n");	134	printf("No disks detected.\n");
134	return -1;	135	return -1;
135	}	136	}
136		137
137	printf(NAME ": Accepting connections\n");	138	printf(NAME ": Accepting connections\n");
-		139	task_retval(0);
138	async_manager();	140	async_manager();
139		141
140	/* Not reached */	142	/* Not reached */
141	return 0;	143	return 0;
142	}	144	}
143		145
144	static int drive_identify(int disk_id, disk_t *d)	146	static int drive_identify(int disk_id, disk_t *d)
145	{	147	{
146	uint16_t data;	148	uint16_t data;
147	uint8_t status;	149	uint8_t status;
148	size_t i;	150	size_t i;
149		151
150	printf("Identify drive %d\n", disk_id);	152	printf("Identify drive %d... ", disk_id);
-		153	fflush(stdout);
-		154
151	pio_write_8(&cmd->drive_head, ((disk_id != 0) ? DHR_DRV : 0));	155	pio_write_8(&cmd->drive_head, ((disk_id != 0) ? DHR_DRV : 0));
152	async_usleep(100);	156	async_usleep(100);
153	pio_write_8(&cmd->command, CMD_IDENTIFY_DRIVE);	157	pio_write_8(&cmd->command, CMD_IDENTIFY_DRIVE);
154		158
155	status = pio_read_8(&cmd->status);	159	status = pio_read_8(&cmd->status);
156	printf("Status = 0x%x\n", status);	-
157		160
158	d->present = false;	161	d->present = false;
159		162
160	/*	163	/*
161	* Detect if drive is present. This is Qemu only! Need to	164	* Detect if drive is present. This is Qemu only! Need to
162	* do the right thing to work with real drives.	165	* do the right thing to work with real drives.
163	*/	166	*/
164	if ((status & SR_DRDY) == 0) {	167	if ((status & SR_DRDY) == 0) {
165	printf("None attached.\n");	168	printf("None attached.\n");
166	return ENOENT;	169	return ENOENT;
167	}	170	}
168		171
169	for (i = 0; i < block_size / 2; i++) {	172	for (i = 0; i < block_size / 2; i++) {
170	do {	173	do {
171	status = pio_read_8(&cmd->status);	174	status = pio_read_8(&cmd->status);
172	} while ((status & SR_DRDY) == 0);	175	} while ((status & SR_DRDY) == 0);
173		176
174	data = pio_read_16(&cmd->data_port);	177	data = pio_read_16(&cmd->data_port);
175		178
176	switch (i) {	179	switch (i) {
177	case 1: d->cylinders = data; break;	180	case 1: d->cylinders = data; break;
178	case 3: d->heads = data; break;	181	case 3: d->heads = data; break;
179	case 6: d->sectors = data; break;	182	case 6: d->sectors = data; break;
180	}	183	}
181	}	184	}
182		185
183	d->blocks = d->cylinders * d->heads * d->sectors;	186	d->blocks = d->cylinders * d->heads * d->sectors;
184		187
185	printf("Geometry: %u cylinders, %u heads, %u sectors\n",	188	printf("Geometry: %u cylinders, %u heads, %u sectors\n",
186	d->cylinders, d->heads, d->sectors);	189	d->cylinders, d->heads, d->sectors);
187		190
188	d->present = true;	191	d->present = true;
189	fibril_mutex_initialize(&d->lock);	192	fibril_mutex_initialize(&d->lock);
190		193
191	return EOK;	194	return EOK;
192	}	195	}
193		196
194	static int ata_bd_init(void)	197	static int ata_bd_init(void)
195	{	198	{
196	void *vaddr;	199	void *vaddr;
197	int rc;	200	int rc;
198		201
199	rc = devmap_driver_register(NAME, ata_bd_connection);	202	rc = devmap_driver_register(NAME, ata_bd_connection);
200	if (rc < 0) {	203	if (rc < 0) {
201	printf(NAME ": Unable to register driver.\n");	204	printf(NAME ": Unable to register driver.\n");
202	return rc;	205	return rc;
203	}	206	}
204		207
205	rc = pio_enable((void *) cmd_physical, sizeof(ata_cmd_t), &vaddr);	208	rc = pio_enable((void *) cmd_physical, sizeof(ata_cmd_t), &vaddr);
206	if (rc != EOK) {	209	if (rc != EOK) {
207	printf(NAME ": Could not initialize device I/O space.\n");	210	printf(NAME ": Could not initialize device I/O space.\n");
208	return rc;	211	return rc;
209	}	212	}
210		213
211	cmd = vaddr;	214	cmd = vaddr;
212		215
213	rc = pio_enable((void *) ctl_physical, sizeof(ata_ctl_t), &vaddr);	216	rc = pio_enable((void *) ctl_physical, sizeof(ata_ctl_t), &vaddr);
214	if (rc != EOK) {	217	if (rc != EOK) {
215	printf(NAME ": Could not initialize device I/O space.\n");	218	printf(NAME ": Could not initialize device I/O space.\n");
216	return rc;	219	return rc;
217	}	220	}
218		221
219	ctl = vaddr;	222	ctl = vaddr;
220		223
221		224
222	return EOK;	225	return EOK;
223	}	226	}
224		227
225	static void ata_bd_connection(ipc_callid_t iid, ipc_call_t *icall)	228	static void ata_bd_connection(ipc_callid_t iid, ipc_call_t *icall)
226	{	229	{
227	void *fs_va = NULL;	230	void *fs_va = NULL;
228	ipc_callid_t callid;	231	ipc_callid_t callid;
229	ipc_call_t call;	232	ipc_call_t call;
230	ipcarg_t method;	233	ipcarg_t method;
231	dev_handle_t dh;	234	dev_handle_t dh;
232	int flags;	235	int flags;
233	int retval;	236	int retval;
234	off_t idx;	237	off_t idx;
235	size_t size;	238	size_t size;
236	int disk_id, i;	239	int disk_id, i;
237		240
238	/* Get the device handle. */	241	/* Get the device handle. */
239	dh = IPC_GET_ARG1(*icall);	242	dh = IPC_GET_ARG1(*icall);
240		243
241	/* Determine which disk device is the client connecting to. */	244	/* Determine which disk device is the client connecting to. */
242	disk_id = -1;	245	disk_id = -1;
243	for (i = 0; i < MAX_DISKS; i++)	246	for (i = 0; i < MAX_DISKS; i++)
244	if (disk[i].dev_handle == dh)	247	if (disk[i].dev_handle == dh)
245	disk_id = i;	248	disk_id = i;
246		249
247	if (disk_id < 0 \|\| disk[disk_id].present == false) {	250	if (disk_id < 0 \|\| disk[disk_id].present == false) {
248	ipc_answer_0(iid, EINVAL);	251	ipc_answer_0(iid, EINVAL);
249	return;	252	return;
250	}	253	}
251		254
252	/* Answer the IPC_M_CONNECT_ME_TO call. */	255	/* Answer the IPC_M_CONNECT_ME_TO call. */
253	ipc_answer_0(iid, EOK);	256	ipc_answer_0(iid, EOK);
254		257
255	if (!ipc_share_out_receive(&callid, &comm_size, &flags)) {	258	if (!ipc_share_out_receive(&callid, &comm_size, &flags)) {
256	ipc_answer_0(callid, EHANGUP);	259	ipc_answer_0(callid, EHANGUP);
257	return;	260	return;
258	}	261	}
259		262
260	fs_va = as_get_mappable_page(comm_size);	263	fs_va = as_get_mappable_page(comm_size);
261	if (fs_va == NULL) {	264	if (fs_va == NULL) {
262	ipc_answer_0(callid, EHANGUP);	265	ipc_answer_0(callid, EHANGUP);
263	return;	266	return;
264	}	267	}
265		268
266	(void) ipc_share_out_finalize(callid, fs_va);	269	(void) ipc_share_out_finalize(callid, fs_va);
267		270
268	while (1) {	271	while (1) {
269	callid = async_get_call(&call);	272	callid = async_get_call(&call);
270	method = IPC_GET_METHOD(call);	273	method = IPC_GET_METHOD(call);
271	switch (method) {	274	switch (method) {
272	case IPC_M_PHONE_HUNGUP:	275	case IPC_M_PHONE_HUNGUP:
273	/* The other side has hung up. */	276	/* The other side has hung up. */
274	ipc_answer_0(callid, EOK);	277	ipc_answer_0(callid, EOK);
275	return;	278	return;
276	case BD_READ_BLOCK:	279	case BD_READ_BLOCK:
277	case BD_WRITE_BLOCK:	280	case BD_WRITE_BLOCK:
278	idx = IPC_GET_ARG1(call);	281	idx = IPC_GET_ARG1(call);
279	size = IPC_GET_ARG2(call);	282	size = IPC_GET_ARG2(call);
280	if (size > comm_size) {	283	if (size > comm_size) {
281	retval = EINVAL;	284	retval = EINVAL;
282	break;	285	break;
283	}	286	}
284	retval = ata_bd_rdwr(disk_id, method, idx,	287	retval = ata_bd_rdwr(disk_id, method, idx,
285	size, fs_va);	288	size, fs_va);
286	break;	289	break;
287	default:	290	default:
288	retval = EINVAL;	291	retval = EINVAL;
289	break;	292	break;
290	}	293	}
291	ipc_answer_0(callid, retval);	294	ipc_answer_0(callid, retval);
292	}	295	}
293	}	296	}
294		297
295	static int ata_bd_rdwr(int disk_id, ipcarg_t method, off_t blk_idx, size_t size,	298	static int ata_bd_rdwr(int disk_id, ipcarg_t method, off_t blk_idx, size_t size,
296	void *buf)	299	void *buf)
297	{	300	{
298	int rc;	301	int rc;
299	size_t now;	302	size_t now;
300		303
301	while (size > 0) {	304	while (size > 0) {
302	now = size < block_size ? size : block_size;	305	now = size < block_size ? size : block_size;
303	if (now != block_size)	306	if (now != block_size)
304	return EINVAL;	307	return EINVAL;
305		308
306	if (method == BD_READ_BLOCK)	309	if (method == BD_READ_BLOCK)
307	rc = ata_bd_read_block(disk_id, blk_idx, 1, buf);	310	rc = ata_bd_read_block(disk_id, blk_idx, 1, buf);
308	else	311	else
309	rc = ata_bd_write_block(disk_id, blk_idx, 1, buf);	312	rc = ata_bd_write_block(disk_id, blk_idx, 1, buf);
310		313
311	if (rc != EOK)	314	if (rc != EOK)
312	return rc;	315	return rc;
313		316
314	buf += block_size;	317	buf += block_size;
315	blk_idx++;	318	blk_idx++;
316		319
317	if (size > block_size)	320	if (size > block_size)
318	size -= block_size;	321	size -= block_size;
319	else	322	else
320	size = 0;	323	size = 0;
321	}	324	}
322		325
323	return EOK;	326	return EOK;
324	}	327	}
325		328
326		329
327	static int ata_bd_read_block(int disk_id, uint64_t blk_idx, size_t blk_cnt,	330	static int ata_bd_read_block(int disk_id, uint64_t blk_idx, size_t blk_cnt,
328	void *buf)	331	void *buf)
329	{	332	{
330	size_t i;	333	size_t i;
331	uint16_t data;	334	uint16_t data;
332	uint8_t status;	335	uint8_t status;
333	uint64_t c, h, s;	336	uint64_t c, h, s;
334	uint64_t idx;	337	uint64_t idx;
335	uint8_t drv_head;	338	uint8_t drv_head;
336	disk_t *d;	339	disk_t *d;
337		340
338	d = &disk[disk_id];	341	d = &disk[disk_id];
339		342
340	/* Check device bounds. */	343	/* Check device bounds. */
341	if (blk_idx >= d->blocks)	344	if (blk_idx >= d->blocks)
342	return EINVAL;	345	return EINVAL;
343		346
344	/* Compute CHS. */	347	/* Compute CHS. */
345	c = blk_idx / (d->heads * d->sectors);	348	c = blk_idx / (d->heads * d->sectors);
346	idx = blk_idx % (d->heads * d->sectors);	349	idx = blk_idx % (d->heads * d->sectors);
347		350
348	h = idx / d->sectors;	351	h = idx / d->sectors;
349	s = 1 + (idx % d->sectors);	352	s = 1 + (idx % d->sectors);
350		353
351	/* New value for Drive/Head register */	354	/* New value for Drive/Head register */
352	drv_head =	355	drv_head =
353	((disk_id != 0) ? DHR_DRV : 0) \|	356	((disk_id != 0) ? DHR_DRV : 0) \|
354	(h & 0x0f);	357	(h & 0x0f);
355		358
356	fibril_mutex_lock(&d->lock);	359	fibril_mutex_lock(&d->lock);
357		360
358	/* Program a Read Sectors operation. */	361	/* Program a Read Sectors operation. */
359		362
360	pio_write_8(&cmd->drive_head, drv_head);	363	pio_write_8(&cmd->drive_head, drv_head);
361	pio_write_8(&cmd->sector_count, 1);	364	pio_write_8(&cmd->sector_count, 1);
362	pio_write_8(&cmd->sector_number, s);	365	pio_write_8(&cmd->sector_number, s);
363	pio_write_8(&cmd->cylinder_low, c & 0xff);	366	pio_write_8(&cmd->cylinder_low, c & 0xff);
364	pio_write_8(&cmd->cylinder_high, c >> 16);	367	pio_write_8(&cmd->cylinder_high, c >> 16);
365	pio_write_8(&cmd->command, CMD_READ_SECTORS);	368	pio_write_8(&cmd->command, CMD_READ_SECTORS);
366		369
367	/* Read data from the disk buffer. */	370	/* Read data from the disk buffer. */
368		371
369	for (i = 0; i < block_size / 2; i++) {	372	for (i = 0; i < block_size / 2; i++) {
370	do {	373	do {
371	status = pio_read_8(&cmd->status);	374	status = pio_read_8(&cmd->status);
372	} while ((status & SR_DRDY) == 0);	375	} while ((status & SR_DRDY) == 0);
373		376
374	data = pio_read_16(&cmd->data_port);	377	data = pio_read_16(&cmd->data_port);
375	((uint16_t *) buf)[i] = data;	378	((uint16_t *) buf)[i] = data;
376	}	379	}
377		380
378	fibril_mutex_unlock(&d->lock);	381	fibril_mutex_unlock(&d->lock);
379	return EOK;	382	return EOK;
380	}	383	}
381		384
382	static int ata_bd_write_block(int disk_id, uint64_t blk_idx, size_t blk_cnt,	385	static int ata_bd_write_block(int disk_id, uint64_t blk_idx, size_t blk_cnt,
383	const void *buf)	386	const void *buf)
384	{	387	{
385	size_t i;	388	size_t i;
386	uint8_t status;	389	uint8_t status;
387	uint64_t c, h, s;	390	uint64_t c, h, s;
388	uint64_t idx;	391	uint64_t idx;
389	uint8_t drv_head;	392	uint8_t drv_head;
390	disk_t *d;	393	disk_t *d;
391		394
392	d = &disk[disk_id];	395	d = &disk[disk_id];
393		396
394	/* Check device bounds. */	397	/* Check device bounds. */
395	if (blk_idx >= d->blocks)	398	if (blk_idx >= d->blocks)
396	return EINVAL;	399	return EINVAL;
397		400
398	/* Compute CHS. */	401	/* Compute CHS. */
399	c = blk_idx / (d->heads * d->sectors);	402	c = blk_idx / (d->heads * d->sectors);
400	idx = blk_idx % (d->heads * d->sectors);	403	idx = blk_idx % (d->heads * d->sectors);
401		404
402	h = idx / d->sectors;	405	h = idx / d->sectors;
403	s = 1 + (idx % d->sectors);	406	s = 1 + (idx % d->sectors);
404		407
405	/* New value for Drive/Head register */	408	/* New value for Drive/Head register */
406	drv_head =	409	drv_head =
407	((disk_id != 0) ? DHR_DRV : 0) \|	410	((disk_id != 0) ? DHR_DRV : 0) \|
408	(h & 0x0f);	411	(h & 0x0f);
409		412
410	fibril_mutex_lock(&d->lock);	413	fibril_mutex_lock(&d->lock);
411		414
412	/* Program a Read Sectors operation. */	415	/* Program a Read Sectors operation. */
413		416
414	pio_write_8(&cmd->drive_head, drv_head);	417	pio_write_8(&cmd->drive_head, drv_head);
415	pio_write_8(&cmd->sector_count, 1);	418	pio_write_8(&cmd->sector_count, 1);
416	pio_write_8(&cmd->sector_number, s);	419	pio_write_8(&cmd->sector_number, s);
417	pio_write_8(&cmd->cylinder_low, c & 0xff);	420	pio_write_8(&cmd->cylinder_low, c & 0xff);
418	pio_write_8(&cmd->cylinder_high, c >> 16);	421	pio_write_8(&cmd->cylinder_high, c >> 16);
419	pio_write_8(&cmd->command, CMD_WRITE_SECTORS);	422	pio_write_8(&cmd->command, CMD_WRITE_SECTORS);
420		423
421	/* Write data to the disk buffer. */	424	/* Write data to the disk buffer. */
422		425
423	for (i = 0; i < block_size / 2; i++) {	426	for (i = 0; i < block_size / 2; i++) {
424	do {	427	do {
425	status = pio_read_8(&cmd->status);	428	status = pio_read_8(&cmd->status);
426	} while ((status & SR_DRDY) == 0);	429	} while ((status & SR_DRDY) == 0);
427		430
428	pio_write_16(&cmd->data_port, ((uint16_t *) buf)[i]);	431	pio_write_16(&cmd->data_port, ((uint16_t *) buf)[i]);
429	}	432	}
430		433
431	fibril_mutex_unlock(&d->lock);	434	fibril_mutex_unlock(&d->lock);
432	return EOK;	435	return EOK;
433	}	436	}
434		437
435		438
436	/**	439	/**
437	* @}	440	* @}
438	*/	441	*/
439		442

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(root)/branches/network/uspace/srv/bd/ata_bd/ata_bd.c – Rev 4581 → 4718