WebSVN – HelenOS – Diff – /trunk/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 "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...\n");
    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");
 
    printf("Status = 0x%x\n", pio_read_8(&cmd->status));
 
    (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");
    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\n", disk_id);
    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);
    printf("Status = 0x%x\n", 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 4545	Rev 4557
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	*
-		41	* The driver services a single controller which can have up to two disks
-		42	* attached.
40	*/	43	*/
41		44
42	#include <stdio.h>	45	#include <stdio.h>
43	#include <libarch/ddi.h>	46	#include <libarch/ddi.h>
44	#include <ddi.h>	47	#include <ddi.h>
45	#include <ipc/ipc.h>	48	#include <ipc/ipc.h>
46	#include <ipc/bd.h>	49	#include <ipc/bd.h>
47	#include <async.h>	50	#include <async.h>
48	#include <as.h>	51	#include <as.h>
49	#include <futex.h>	52	#include <fibril_sync.h>
50	#include <devmap.h>	53	#include <devmap.h>
51	#include <sys/types.h>	54	#include <sys/types.h>
52	#include <errno.h>	55	#include <errno.h>
53	#include <bool.h>	56	#include <bool.h>
54		57
55	#include "ata_bd.h"	58	#include "ata_bd.h"
56		59
57	#define NAME "ata_bd"	60	#define NAME "ata_bd"
58		61
59	static const size_t block_size = 512;	62	static const size_t block_size = 512;
60	static size_t comm_size;	63	static size_t comm_size;
61		64
62	static uintptr_t cmd_physical = 0x1f0;	65	static uintptr_t cmd_physical = 0x1f0;
63	static uintptr_t ctl_physical = 0x170;	66	static uintptr_t ctl_physical = 0x170;
64	static ata_cmd_t *cmd;	67	static ata_cmd_t *cmd;
65	static ata_ctl_t *ctl;	68	static ata_ctl_t *ctl;
66		69
67	static dev_handle_t dev_handle[MAX_DISKS];	70	/** Per-disk state. */
68		-
69	static atomic_t dev_futex = FUTEX_INITIALIZER;	-
70		-
71	static disk_t disk[MAX_DISKS];	71	static disk_t disk[MAX_DISKS];
72		72
73	static int ata_bd_init(void);	73	static int ata_bd_init(void);
74	static void ata_bd_connection(ipc_callid_t iid, ipc_call_t *icall);	74	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,	75	static int ata_bd_rdwr(int disk_id, ipcarg_t method, off_t offset, size_t size,
76	void *buf);	76	void *buf);
77	static int ata_bd_read_block(int disk_id, uint64_t blk_idx, size_t blk_cnt,	77	static int ata_bd_read_block(int disk_id, uint64_t blk_idx, size_t blk_cnt,
78	void *buf);	78	void *buf);
79	static int ata_bd_write_block(int disk_id, uint64_t blk_idx, size_t blk_cnt,	79	static int ata_bd_write_block(int disk_id, uint64_t blk_idx, size_t blk_cnt,
80	const void *buf);	80	const void *buf);
81	static int drive_identify(int drive_id, disk_t *d);	81	static int drive_identify(int drive_id, disk_t *d);
82		82
83	int main(int argc, char **argv)	83	int main(int argc, char **argv)
84	{	84	{
85	uint8_t status;	85	uint8_t status;
86	char name[16];	86	char name[16];
87	int i, rc;	87	int i, rc;
88	int n_disks;	88	int n_disks;
89		89
90	printf(NAME ": ATA disk driver\n");	90	printf(NAME ": ATA disk driver\n");
91		91
92	printf("cmd_physical = 0x%x\n", cmd_physical);	92	printf("I/O address 0x%x\n", cmd_physical);
93	printf("ctl_physical = 0x%x\n", ctl_physical);	-
94		93
95	if (ata_bd_init() != EOK)	94	if (ata_bd_init() != EOK)
96	return -1;	95	return -1;
97		96
98	/* Put drives to reset, disable interrupts. */	97	/* Put drives to reset, disable interrupts. */
99	printf("Reset drives...\n");	98	printf("Reset drives...\n");
100	pio_write_8(&ctl->device_control, DCR_SRST);	99	pio_write_8(&ctl->device_control, DCR_SRST);
101	/* FIXME: Find out how to do this properly. */	100	/* FIXME: Find out how to do this properly. */
102	async_usleep(100);	101	async_usleep(100);
103	pio_write_8(&ctl->device_control, 0);	102	pio_write_8(&ctl->device_control, 0);
104		103
105	do {	104	do {
106	status = pio_read_8(&cmd->status);	105	status = pio_read_8(&cmd->status);
107	} while ((status & SR_BSY) != 0);	106	} while ((status & SR_BSY) != 0);
108	printf("Done\n");	107	printf("Done\n");
109		108
110	printf("Status = 0x%x\n", pio_read_8(&cmd->status));	109	printf("Status = 0x%x\n", pio_read_8(&cmd->status));
111		110
112	(void) drive_identify(0, &disk[0]);	111	(void) drive_identify(0, &disk[0]);
113	(void) drive_identify(1, &disk[1]);	112	(void) drive_identify(1, &disk[1]);
114		113
115	n_disks = 0;	114	n_disks = 0;
116		115
117	for (i = 0; i < MAX_DISKS; i++) {	116	for (i = 0; i < MAX_DISKS; i++) {
118	/* Skip unattached drives. */	117	/* Skip unattached drives. */
119	if (disk[i].present == false)	118	if (disk[i].present == false)
120	continue;	119	continue;
121		120
122	snprintf(name, 16, "disk%d", i);	121	snprintf(name, 16, "disk%d", i);
123	rc = devmap_device_register(name, &dev_handle[i]);	122	rc = devmap_device_register(name, &disk[i].dev_handle);
124	if (rc != EOK) {	123	if (rc != EOK) {
125	devmap_hangup_phone(DEVMAP_DRIVER);	124	devmap_hangup_phone(DEVMAP_DRIVER);
126	printf(NAME ": Unable to register device %s.\n",	125	printf(NAME ": Unable to register device %s.\n",
127	name);	126	name);
128	return rc;	127	return rc;
129	}	128	}
130	++n_disks;	129	++n_disks;
131	}	130	}
132		131
133	if (n_disks == 0) {	132	if (n_disks == 0) {
134	printf("No disks detected.\n");	133	printf("No disks detected.\n");
135	return -1;	134	return -1;
136	}	135	}
137		136
138	printf(NAME ": Accepting connections\n");	137	printf(NAME ": Accepting connections\n");
139	async_manager();	138	async_manager();
140		139
141	/* Not reached */	140	/* Not reached */
142	return 0;	141	return 0;
143	}	142	}
144		143
145	static int drive_identify(int disk_id, disk_t *d)	144	static int drive_identify(int disk_id, disk_t *d)
146	{	145	{
147	uint16_t data;	146	uint16_t data;
148	uint8_t status;	147	uint8_t status;
149	size_t i;	148	size_t i;
150		149
151	printf("Identify drive %d\n", disk_id);	150	printf("Identify drive %d\n", disk_id);
152	pio_write_8(&cmd->drive_head, ((disk_id != 0) ? DHR_DRV : 0));	151	pio_write_8(&cmd->drive_head, ((disk_id != 0) ? DHR_DRV : 0));
153	async_usleep(100);	152	async_usleep(100);
154	pio_write_8(&cmd->command, CMD_IDENTIFY_DRIVE);	153	pio_write_8(&cmd->command, CMD_IDENTIFY_DRIVE);
155		154
156	status = pio_read_8(&cmd->status);	155	status = pio_read_8(&cmd->status);
157	printf("Status = 0x%x\n", status);	156	printf("Status = 0x%x\n", status);
158		157
159	d->present = false;	158	d->present = false;
160		159
161	/*	160	/*
162	* Detect if drive is present. This is Qemu only! Need to	161	* Detect if drive is present. This is Qemu only! Need to
163	* do the right thing to work with real drives.	162	* do the right thing to work with real drives.
164	*/	163	*/
165	if ((status & SR_DRDY) == 0) {	164	if ((status & SR_DRDY) == 0) {
166	printf("None attached.\n");	165	printf("None attached.\n");
167	return ENOENT;	166	return ENOENT;
168	}	167	}
169		168
170	for (i = 0; i < block_size / 2; i++) {	169	for (i = 0; i < block_size / 2; i++) {
171	do {	170	do {
172	status = pio_read_8(&cmd->status);	171	status = pio_read_8(&cmd->status);
173	} while ((status & SR_DRDY) == 0);	172	} while ((status & SR_DRDY) == 0);
174		173
175	data = pio_read_16(&cmd->data_port);	174	data = pio_read_16(&cmd->data_port);
176		175
177	switch (i) {	176	switch (i) {
178	case 1: d->cylinders = data; break;	177	case 1: d->cylinders = data; break;
179	case 3: d->heads = data; break;	178	case 3: d->heads = data; break;
180	case 6: d->sectors = data; break;	179	case 6: d->sectors = data; break;
181	}	180	}
182	}	181	}
183		182
184	printf("\n\nStatus = 0x%x\n", pio_read_8(&cmd->status));	-
185		-
186	d->blocks = d->cylinders * d->heads * d->sectors;	183	d->blocks = d->cylinders * d->heads * d->sectors;
187		184
188	printf("Geometry: %u cylinders, %u heads, %u sectors\n",	185	printf("Geometry: %u cylinders, %u heads, %u sectors\n",
189	d->cylinders, d->heads, d->sectors);	186	d->cylinders, d->heads, d->sectors);
190		187
191	d->present = true;	188	d->present = true;
-		189	fibril_mutex_initialize(&d->lock);
192		190
193	return EOK;	191	return EOK;
194	}	192	}
195		193
196	static int ata_bd_init(void)	194	static int ata_bd_init(void)
197	{	195	{
198	void *vaddr;	196	void *vaddr;
199	int rc;	197	int rc;
200		198
201	rc = devmap_driver_register(NAME, ata_bd_connection);	199	rc = devmap_driver_register(NAME, ata_bd_connection);
202	if (rc < 0) {	200	if (rc < 0) {
203	printf(NAME ": Unable to register driver.\n");	201	printf(NAME ": Unable to register driver.\n");
204	return rc;	202	return rc;
205	}	203	}
206		204
207	rc = pio_enable((void *) cmd_physical, sizeof(ata_cmd_t), &vaddr);	205	rc = pio_enable((void *) cmd_physical, sizeof(ata_cmd_t), &vaddr);
208	if (rc != EOK) {	206	if (rc != EOK) {
209	printf(NAME ": Could not initialize device I/O space.\n");	207	printf(NAME ": Could not initialize device I/O space.\n");
210	return rc;	208	return rc;
211	}	209	}
212		210
213	cmd = vaddr;	211	cmd = vaddr;
214		212
215	rc = pio_enable((void *) ctl_physical, sizeof(ata_ctl_t), &vaddr);	213	rc = pio_enable((void *) ctl_physical, sizeof(ata_ctl_t), &vaddr);
216	if (rc != EOK) {	214	if (rc != EOK) {
217	printf(NAME ": Could not initialize device I/O space.\n");	215	printf(NAME ": Could not initialize device I/O space.\n");
218	return rc;	216	return rc;
219	}	217	}
220		218
221	ctl = vaddr;	219	ctl = vaddr;
222		220
223		221
224	return EOK;	222	return EOK;
225	}	223	}
226		224
227	static void ata_bd_connection(ipc_callid_t iid, ipc_call_t *icall)	225	static void ata_bd_connection(ipc_callid_t iid, ipc_call_t *icall)
228	{	226	{
229	void *fs_va = NULL;	227	void *fs_va = NULL;
230	ipc_callid_t callid;	228	ipc_callid_t callid;
231	ipc_call_t call;	229	ipc_call_t call;
232	ipcarg_t method;	230	ipcarg_t method;
233	dev_handle_t dh;	231	dev_handle_t dh;
234	int flags;	232	int flags;
235	int retval;	233	int retval;
236	off_t idx;	234	off_t idx;
237	size_t size;	235	size_t size;
238	int disk_id, i;	236	int disk_id, i;
239		237
240	/* Get the device handle. */	238	/* Get the device handle. */
241	dh = IPC_GET_ARG1(*icall);	239	dh = IPC_GET_ARG1(*icall);
242		240
243	/* Determine which disk device is the client connecting to. */	241	/* Determine which disk device is the client connecting to. */
244	disk_id = -1;	242	disk_id = -1;
245	for (i = 0; i < MAX_DISKS; i++)	243	for (i = 0; i < MAX_DISKS; i++)
246	if (dev_handle[i] == dh)	244	if (disk[i].dev_handle == dh)
247	disk_id = i;	245	disk_id = i;
248		246
249	if (disk_id < 0 \|\| disk[disk_id].present == false) {	247	if (disk_id < 0 \|\| disk[disk_id].present == false) {
250	ipc_answer_0(iid, EINVAL);	248	ipc_answer_0(iid, EINVAL);
251	return;	249	return;
252	}	250	}
253		251
254	/* Answer the IPC_M_CONNECT_ME_TO call. */	252	/* Answer the IPC_M_CONNECT_ME_TO call. */
255	ipc_answer_0(iid, EOK);	253	ipc_answer_0(iid, EOK);
256		254
257	if (!ipc_share_out_receive(&callid, &comm_size, &flags)) {	255	if (!ipc_share_out_receive(&callid, &comm_size, &flags)) {
258	ipc_answer_0(callid, EHANGUP);	256	ipc_answer_0(callid, EHANGUP);
259	return;	257	return;
260	}	258	}
261		259
262	fs_va = as_get_mappable_page(comm_size);	260	fs_va = as_get_mappable_page(comm_size);
263	if (fs_va == NULL) {	261	if (fs_va == NULL) {
264	ipc_answer_0(callid, EHANGUP);	262	ipc_answer_0(callid, EHANGUP);
265	return;	263	return;
266	}	264	}
267		265
268	(void) ipc_share_out_finalize(callid, fs_va);	266	(void) ipc_share_out_finalize(callid, fs_va);
269		267
270	while (1) {	268	while (1) {
271	callid = async_get_call(&call);	269	callid = async_get_call(&call);
272	method = IPC_GET_METHOD(call);	270	method = IPC_GET_METHOD(call);
273	switch (method) {	271	switch (method) {
274	case IPC_M_PHONE_HUNGUP:	272	case IPC_M_PHONE_HUNGUP:
275	/* The other side has hung up. */	273	/* The other side has hung up. */
276	ipc_answer_0(callid, EOK);	274	ipc_answer_0(callid, EOK);
277	return;	275	return;
278	case BD_READ_BLOCK:	276	case BD_READ_BLOCK:
279	case BD_WRITE_BLOCK:	277	case BD_WRITE_BLOCK:
280	idx = IPC_GET_ARG1(call);	278	idx = IPC_GET_ARG1(call);
281	size = IPC_GET_ARG2(call);	279	size = IPC_GET_ARG2(call);
282	if (size > comm_size) {	280	if (size > comm_size) {
283	retval = EINVAL;	281	retval = EINVAL;
284	break;	282	break;
285	}	283	}
286	retval = ata_bd_rdwr(disk_id, method, idx,	284	retval = ata_bd_rdwr(disk_id, method, idx,
287	size, fs_va);	285	size, fs_va);
288	break;	286	break;
289	default:	287	default:
290	retval = EINVAL;	288	retval = EINVAL;
291	break;	289	break;
292	}	290	}
293	ipc_answer_0(callid, retval);	291	ipc_answer_0(callid, retval);
294	}	292	}
295	}	293	}
296		294
297	static int ata_bd_rdwr(int disk_id, ipcarg_t method, off_t blk_idx, size_t size,	295	static int ata_bd_rdwr(int disk_id, ipcarg_t method, off_t blk_idx, size_t size,
298	void *buf)	296	void *buf)
299	{	297	{
300	int rc;	298	int rc;
301	size_t now;	299	size_t now;
302		300
303	while (size > 0) {	301	while (size > 0) {
304	now = size < block_size ? size : block_size;	302	now = size < block_size ? size : block_size;
305	if (now != block_size)	303	if (now != block_size)
306	return EINVAL;	304	return EINVAL;
307		305
308	if (method == BD_READ_BLOCK)	306	if (method == BD_READ_BLOCK)
309	rc = ata_bd_read_block(disk_id, blk_idx, 1, buf);	307	rc = ata_bd_read_block(disk_id, blk_idx, 1, buf);
310	else	308	else
311	rc = ata_bd_write_block(disk_id, blk_idx, 1, buf);	309	rc = ata_bd_write_block(disk_id, blk_idx, 1, buf);
312		310
313	if (rc != EOK)	311	if (rc != EOK)
314	return rc;	312	return rc;
315		313
316	buf += block_size;	314	buf += block_size;
317	blk_idx++;	315	blk_idx++;
318		316
319	if (size > block_size)	317	if (size > block_size)
320	size -= block_size;	318	size -= block_size;
321	else	319	else
322	size = 0;	320	size = 0;
323	}	321	}
324		322
325	return EOK;	323	return EOK;
326	}	324	}
327		325
328		326
329	static int ata_bd_read_block(int disk_id, uint64_t blk_idx, size_t blk_cnt,	327	static int ata_bd_read_block(int disk_id, uint64_t blk_idx, size_t blk_cnt,
330	void *buf)	328	void *buf)
331	{	329	{
332	size_t i;	330	size_t i;
333	uint16_t data;	331	uint16_t data;
334	uint8_t status;	332	uint8_t status;
335	uint64_t c, h, s;	333	uint64_t c, h, s;
336	uint64_t idx;	334	uint64_t idx;
337	uint8_t drv_head;	335	uint8_t drv_head;
338	disk_t *d;	336	disk_t *d;
339		337
340	d = &disk[disk_id];	338	d = &disk[disk_id];
341		339
342	/* Check device bounds. */	340	/* Check device bounds. */
343	if (blk_idx >= d->blocks)	341	if (blk_idx >= d->blocks)
344	return EINVAL;	342	return EINVAL;
345		343
346	/* Compute CHS. */	344	/* Compute CHS. */
347	c = blk_idx / (d->heads * d->sectors);	345	c = blk_idx / (d->heads * d->sectors);
348	idx = blk_idx % (d->heads * d->sectors);	346	idx = blk_idx % (d->heads * d->sectors);
349		347
350	h = idx / d->sectors;	348	h = idx / d->sectors;
351	s = 1 + (idx % d->sectors);	349	s = 1 + (idx % d->sectors);
352		350
353	/* New value for Drive/Head register */	351	/* New value for Drive/Head register */
354	drv_head =	352	drv_head =
355	((disk_id != 0) ? DHR_DRV : 0) \|	353	((disk_id != 0) ? DHR_DRV : 0) \|
356	(h & 0x0f);	354	(h & 0x0f);
357		355
358	futex_down(&dev_futex);	356	fibril_mutex_lock(&d->lock);
359		357
360	/* Program a Read Sectors operation. */	358	/* Program a Read Sectors operation. */
361		359
362	pio_write_8(&cmd->drive_head, drv_head);	360	pio_write_8(&cmd->drive_head, drv_head);
363	pio_write_8(&cmd->sector_count, 1);	361	pio_write_8(&cmd->sector_count, 1);
364	pio_write_8(&cmd->sector_number, s);	362	pio_write_8(&cmd->sector_number, s);
365	pio_write_8(&cmd->cylinder_low, c & 0xff);	363	pio_write_8(&cmd->cylinder_low, c & 0xff);
366	pio_write_8(&cmd->cylinder_high, c >> 16);	364	pio_write_8(&cmd->cylinder_high, c >> 16);
367	pio_write_8(&cmd->command, CMD_READ_SECTORS);	365	pio_write_8(&cmd->command, CMD_READ_SECTORS);
368		366
369	/* Read data from the disk buffer. */	367	/* Read data from the disk buffer. */
370		368
371	for (i = 0; i < block_size / 2; i++) {	369	for (i = 0; i < block_size / 2; i++) {
372	do {	370	do {
373	status = pio_read_8(&cmd->status);	371	status = pio_read_8(&cmd->status);
374	} while ((status & SR_DRDY) == 0);	372	} while ((status & SR_DRDY) == 0);
375		373
376	data = pio_read_16(&cmd->data_port);	374	data = pio_read_16(&cmd->data_port);
377	((uint16_t *) buf)[i] = data;	375	((uint16_t *) buf)[i] = data;
378	}	376	}
379		377
380	futex_up(&dev_futex);	378	fibril_mutex_unlock(&d->lock);
381	return EOK;	379	return EOK;
382	}	380	}
383		381
384	static int ata_bd_write_block(int disk_id, uint64_t blk_idx, size_t blk_cnt,	382	static int ata_bd_write_block(int disk_id, uint64_t blk_idx, size_t blk_cnt,
385	const void *buf)	383	const void *buf)
386	{	384	{
387	size_t i;	385	size_t i;
388	uint8_t status;	386	uint8_t status;
389	uint64_t c, h, s;	387	uint64_t c, h, s;
390	uint64_t idx;	388	uint64_t idx;
391	uint8_t drv_head;	389	uint8_t drv_head;
392	disk_t *d;	390	disk_t *d;
393		391
394	d = &disk[disk_id];	392	d = &disk[disk_id];
395		393
396	/* Check device bounds. */	394	/* Check device bounds. */
397	if (blk_idx >= d->blocks)	395	if (blk_idx >= d->blocks)
398	return EINVAL;	396	return EINVAL;
399		397
400	/* Compute CHS. */	398	/* Compute CHS. */
401	c = blk_idx / (d->heads * d->sectors);	399	c = blk_idx / (d->heads * d->sectors);
402	idx = blk_idx % (d->heads * d->sectors);	400	idx = blk_idx % (d->heads * d->sectors);
403		401
404	h = idx / d->sectors;	402	h = idx / d->sectors;
405	s = 1 + (idx % d->sectors);	403	s = 1 + (idx % d->sectors);
406		404
407	/* New value for Drive/Head register */	405	/* New value for Drive/Head register */
408	drv_head =	406	drv_head =
409	((disk_id != 0) ? DHR_DRV : 0) \|	407	((disk_id != 0) ? DHR_DRV : 0) \|
410	(h & 0x0f);	408	(h & 0x0f);
411		409
412	futex_down(&dev_futex);	410	fibril_mutex_lock(&d->lock);
413		411
414	/* Program a Read Sectors operation. */	412	/* Program a Read Sectors operation. */
415		413
416	pio_write_8(&cmd->drive_head, drv_head);	414	pio_write_8(&cmd->drive_head, drv_head);
417	pio_write_8(&cmd->sector_count, 1);	415	pio_write_8(&cmd->sector_count, 1);
418	pio_write_8(&cmd->sector_number, s);	416	pio_write_8(&cmd->sector_number, s);
419	pio_write_8(&cmd->cylinder_low, c & 0xff);	417	pio_write_8(&cmd->cylinder_low, c & 0xff);
420	pio_write_8(&cmd->cylinder_high, c >> 16);	418	pio_write_8(&cmd->cylinder_high, c >> 16);
421	pio_write_8(&cmd->command, CMD_WRITE_SECTORS);	419	pio_write_8(&cmd->command, CMD_WRITE_SECTORS);
422		420
423	/* Write data to the disk buffer. */	421	/* Write data to the disk buffer. */
424		422
425	for (i = 0; i < block_size / 2; i++) {	423	for (i = 0; i < block_size / 2; i++) {
426	do {	424	do {
427	status = pio_read_8(&cmd->status);	425	status = pio_read_8(&cmd->status);
428	} while ((status & SR_DRDY) == 0);	426	} while ((status & SR_DRDY) == 0);
429		427
430	pio_write_16(&cmd->data_port, ((uint16_t *) buf)[i]);	428	pio_write_16(&cmd->data_port, ((uint16_t *) buf)[i]);
431	}	429	}
432		430
433	futex_up(&dev_futex);	431	fibril_mutex_unlock(&d->lock);
434	return EOK;	432	return EOK;
435	}	433	}
436		434
437		435
438	/**	436	/**
439	* @}	437	* @}
440	*/	438	*/
441		439

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(root)/trunk/uspace/srv/bd/ata_bd/ata_bd.c – Rev 4545 → 4557