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.
 */
 
#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 <futex.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;
 
static dev_handle_t dev_handle[MAX_DISKS];
 
static atomic_t dev_futex = FUTEX_INITIALIZER;
 
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, off_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("cmd_physical = 0x%x\n", cmd_physical);
    printf("ctl_physical = 0x%x\n", ctl_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, &dev_handle[i]);
        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;
    int 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;
        }
    }
 
    printf("\n\nStatus = 0x%x\n", pio_read_8(&cmd->status));
 
    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;
 
    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;
    off_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 || 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, off_t size,
    void *buf)
{
    int rc;
    off_t now;
 
    while (size > 0) {
        now = size < block_size ? size : (off_t) 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);
 
    futex_down(&dev_futex);
 
    /* 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;
    }
 
    futex_up(&dev_futex);
    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);
 
    futex_down(&dev_futex);
 
    /* 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]);
    }
 
    futex_up(&dev_futex);
    return EOK;
}
 
 
/**
 * @}
 */
 

Rev 4531	Rev 4532
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		41
42	#include <stdio.h>	42	#include <stdio.h>
43	#include <libarch/ddi.h>	43	#include <libarch/ddi.h>
44	#include <ddi.h>	44	#include <ddi.h>
45	#include <ipc/ipc.h>	45	#include <ipc/ipc.h>
46	#include <ipc/bd.h>	46	#include <ipc/bd.h>
47	#include <async.h>	47	#include <async.h>
48	#include <as.h>	48	#include <as.h>
49	#include <futex.h>	49	#include <futex.h>
50	#include <devmap.h>	50	#include <devmap.h>
51	#include <sys/types.h>	51	#include <sys/types.h>
52	#include <errno.h>	52	#include <errno.h>
53	#include <bool.h>	53	#include <bool.h>
54		54
55	#include "ata_bd.h"	55	#include "ata_bd.h"
56		56
57	#define NAME "ata_bd"	57	#define NAME "ata_bd"
58		58
59	static const size_t block_size = 512;	59	static const size_t block_size = 512;
60	static size_t comm_size;	60	static size_t comm_size;
61		61
62	static uintptr_t cmd_physical = 0x1f0;	62	static uintptr_t cmd_physical = 0x1f0;
63	static uintptr_t ctl_physical = 0x170;	63	static uintptr_t ctl_physical = 0x170;
64	static ata_cmd_t *cmd;	64	static ata_cmd_t *cmd;
65	static ata_ctl_t *ctl;	65	static ata_ctl_t *ctl;
66		66
67	static dev_handle_t dev_handle[MAX_DISKS];	67	static dev_handle_t dev_handle[MAX_DISKS];
68		68
69	static atomic_t dev_futex = FUTEX_INITIALIZER;	69	static atomic_t dev_futex = FUTEX_INITIALIZER;
70		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, off_t size,	75	static int ata_bd_rdwr(int disk_id, ipcarg_t method, off_t offset, off_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,
-		80	const void *buf);
79	static int drive_identify(int drive_id, disk_t *d);	81	static int drive_identify(int drive_id, disk_t *d);
80		82
81	int main(int argc, char **argv)	83	int main(int argc, char **argv)
82	{	84	{
83	uint8_t status;	85	uint8_t status;
84	char name[16];	86	char name[16];
85	int i, rc;	87	int i, rc;
86	int n_disks;	88	int n_disks;
87		89
88	printf(NAME ": ATA disk driver\n");	90	printf(NAME ": ATA disk driver\n");
89		91
90	printf("cmd_physical = 0x%x\n", cmd_physical);	92	printf("cmd_physical = 0x%x\n", cmd_physical);
91	printf("ctl_physical = 0x%x\n", ctl_physical);	93	printf("ctl_physical = 0x%x\n", ctl_physical);
92		94
93	if (ata_bd_init() != EOK)	95	if (ata_bd_init() != EOK)
94	return -1;	96	return -1;
95		97
96	/* Put drives to reset, disable interrupts. */	98	/* Put drives to reset, disable interrupts. */
97	printf("Reset drives...\n");	99	printf("Reset drives...\n");
98	pio_write_8(&ctl->device_control, DCR_SRST);	100	pio_write_8(&ctl->device_control, DCR_SRST);
99	/* FIXME: Find out how to do this properly. */	101	/* FIXME: Find out how to do this properly. */
100	async_usleep(100);	102	async_usleep(100);
101	pio_write_8(&ctl->device_control, 0);	103	pio_write_8(&ctl->device_control, 0);
102		104
103	do {	105	do {
104	status = pio_read_8(&cmd->status);	106	status = pio_read_8(&cmd->status);
105	} while ((status & SR_BSY) != 0);	107	} while ((status & SR_BSY) != 0);
106	printf("Done\n");	108	printf("Done\n");
107		109
108	printf("Status = 0x%x\n", pio_read_8(&cmd->status));	110	printf("Status = 0x%x\n", pio_read_8(&cmd->status));
109		111
110	(void) drive_identify(0, &disk[0]);	112	(void) drive_identify(0, &disk[0]);
111	(void) drive_identify(1, &disk[1]);	113	(void) drive_identify(1, &disk[1]);
112		114
113	n_disks = 0;	115	n_disks = 0;
114		116
115	for (i = 0; i < MAX_DISKS; i++) {	117	for (i = 0; i < MAX_DISKS; i++) {
116	/* Skip unattached drives. */	118	/* Skip unattached drives. */
117	if (disk[i].present == false)	119	if (disk[i].present == false)
118	continue;	120	continue;
119		121
120	snprintf(name, 16, "disk%d", i);	122	snprintf(name, 16, "disk%d", i);
121	rc = devmap_device_register(name, &dev_handle[i]);	123	rc = devmap_device_register(name, &dev_handle[i]);
122	if (rc != EOK) {	124	if (rc != EOK) {
123	devmap_hangup_phone(DEVMAP_DRIVER);	125	devmap_hangup_phone(DEVMAP_DRIVER);
124	printf(NAME ": Unable to register device %s.\n",	126	printf(NAME ": Unable to register device %s.\n",
125	name);	127	name);
126	return rc;	128	return rc;
127	}	129	}
128	++n_disks;	130	++n_disks;
129	}	131	}
130		132
131	if (n_disks == 0) {	133	if (n_disks == 0) {
132	printf("No disks detected.\n");	134	printf("No disks detected.\n");
133	return -1;	135	return -1;
134	}	136	}
135		137
136	printf(NAME ": Accepting connections\n");	138	printf(NAME ": Accepting connections\n");
137	async_manager();	139	async_manager();
138		140
139	/* Not reached */	141	/* Not reached */
140	return 0;	142	return 0;
141	}	143	}
142		144
143	static int drive_identify(int disk_id, disk_t *d)	145	static int drive_identify(int disk_id, disk_t *d)
144	{	146	{
145	uint16_t data;	147	uint16_t data;
146	uint8_t status;	148	uint8_t status;
147	int i;	149	int i;
148		150
149	printf("Identify drive %d\n", disk_id);	151	printf("Identify drive %d\n", disk_id);
150	pio_write_8(&cmd->drive_head, ((disk_id != 0) ? DHR_DRV : 0));	152	pio_write_8(&cmd->drive_head, ((disk_id != 0) ? DHR_DRV : 0));
151	async_usleep(100);	153	async_usleep(100);
152	pio_write_8(&cmd->command, CMD_IDENTIFY_DRIVE);	154	pio_write_8(&cmd->command, CMD_IDENTIFY_DRIVE);
153		155
154	status = pio_read_8(&cmd->status);	156	status = pio_read_8(&cmd->status);
155	printf("Status = 0x%x\n", status);	157	printf("Status = 0x%x\n", status);
156		158
157	d->present = false;	159	d->present = false;
158		160
159	/*	161	/*
160	* Detect if drive is present. This is Qemu only! Need to	162	* Detect if drive is present. This is Qemu only! Need to
161	* do the right thing to work with real drives.	163	* do the right thing to work with real drives.
162	*/	164	*/
163	if ((status & SR_DRDY) == 0) {	165	if ((status & SR_DRDY) == 0) {
164	printf("None attached.\n");	166	printf("None attached.\n");
165	return ENOENT;	167	return ENOENT;
166	}	168	}
167		169
168	for (i = 0; i < block_size / 2; i++) {	170	for (i = 0; i < block_size / 2; i++) {
169	do {	171	do {
170	status = pio_read_8(&cmd->status);	172	status = pio_read_8(&cmd->status);
171	} while ((status & SR_DRDY) == 0);	173	} while ((status & SR_DRDY) == 0);
172		174
173	data = pio_read_16(&cmd->data_port);	175	data = pio_read_16(&cmd->data_port);
174		176
175	switch (i) {	177	switch (i) {
176	case 1: d->cylinders = data; break;	178	case 1: d->cylinders = data; break;
177	case 3: d->heads = data; break;	179	case 3: d->heads = data; break;
178	case 6: d->sectors = data; break;	180	case 6: d->sectors = data; break;
179	}	181	}
180	}	182	}
181		183
182	printf("\n\nStatus = 0x%x\n", pio_read_8(&cmd->status));	184	printf("\n\nStatus = 0x%x\n", pio_read_8(&cmd->status));
183		185
184	d->blocks = d->cylinders * d->heads * d->sectors;	186	d->blocks = d->cylinders * d->heads * d->sectors;
185		187
186	printf("Geometry: %u cylinders, %u heads, %u sectors\n",	188	printf("Geometry: %u cylinders, %u heads, %u sectors\n",
187	d->cylinders, d->heads, d->sectors);	189	d->cylinders, d->heads, d->sectors);
188		190
189	d->present = true;	191	d->present = true;
190		192
191	return EOK;	193	return EOK;
192	}	194	}
193		195
194	static int ata_bd_init(void)	196	static int ata_bd_init(void)
195	{	197	{
196	void *vaddr;	198	void *vaddr;
197	int rc;	199	int rc;
198		200
199	rc = devmap_driver_register(NAME, ata_bd_connection);	201	rc = devmap_driver_register(NAME, ata_bd_connection);
200	if (rc < 0) {	202	if (rc < 0) {
201	printf(NAME ": Unable to register driver.\n");	203	printf(NAME ": Unable to register driver.\n");
202	return rc;	204	return rc;
203	}	205	}
204		206
205	rc = pio_enable((void *) cmd_physical, sizeof(ata_cmd_t), &vaddr);	207	rc = pio_enable((void *) cmd_physical, sizeof(ata_cmd_t), &vaddr);
206	if (rc != EOK) {	208	if (rc != EOK) {
207	printf(NAME ": Could not initialize device I/O space.\n");	209	printf(NAME ": Could not initialize device I/O space.\n");
208	return rc;	210	return rc;
209	}	211	}
210		212
211	cmd = vaddr;	213	cmd = vaddr;
212		214
213	rc = pio_enable((void *) ctl_physical, sizeof(ata_ctl_t), &vaddr);	215	rc = pio_enable((void *) ctl_physical, sizeof(ata_ctl_t), &vaddr);
214	if (rc != EOK) {	216	if (rc != EOK) {
215	printf(NAME ": Could not initialize device I/O space.\n");	217	printf(NAME ": Could not initialize device I/O space.\n");
216	return rc;	218	return rc;
217	}	219	}
218		220
219	ctl = vaddr;	221	ctl = vaddr;
220		222
221		223
222	return EOK;	224	return EOK;
223	}	225	}
224		226
225	static void ata_bd_connection(ipc_callid_t iid, ipc_call_t *icall)	227	static void ata_bd_connection(ipc_callid_t iid, ipc_call_t *icall)
226	{	228	{
227	void *fs_va = NULL;	229	void *fs_va = NULL;
228	ipc_callid_t callid;	230	ipc_callid_t callid;
229	ipc_call_t call;	231	ipc_call_t call;
230	ipcarg_t method;	232	ipcarg_t method;
231	dev_handle_t dh;	233	dev_handle_t dh;
232	int flags;	234	int flags;
233	int retval;	235	int retval;
234	off_t idx;	236	off_t idx;
235	off_t size;	237	off_t size;
236	int disk_id, i;	238	int disk_id, i;
237		239
238	/* Get the device handle. */	240	/* Get the device handle. */
239	dh = IPC_GET_ARG1(*icall);	241	dh = IPC_GET_ARG1(*icall);
240		242
241	/* Determine which disk device is the client connecting to. */	243	/* Determine which disk device is the client connecting to. */
242	disk_id = -1;	244	disk_id = -1;
243	for (i = 0; i < MAX_DISKS; i++)	245	for (i = 0; i < MAX_DISKS; i++)
244	if (dev_handle[i] == dh)	246	if (dev_handle[i] == dh)
245	disk_id = i;	247	disk_id = i;
246		248
247	if (disk_id < 0 \|\| disk[disk_id].present == false) {	249	if (disk_id < 0 \|\| disk[disk_id].present == false) {
248	ipc_answer_0(iid, EINVAL);	250	ipc_answer_0(iid, EINVAL);
249	return;	251	return;
250	}	252	}
251		253
252	/* Answer the IPC_M_CONNECT_ME_TO call. */	254	/* Answer the IPC_M_CONNECT_ME_TO call. */
253	ipc_answer_0(iid, EOK);	255	ipc_answer_0(iid, EOK);
254		256
255	if (!ipc_share_out_receive(&callid, &comm_size, &flags)) {	257	if (!ipc_share_out_receive(&callid, &comm_size, &flags)) {
256	ipc_answer_0(callid, EHANGUP);	258	ipc_answer_0(callid, EHANGUP);
257	return;	259	return;
258	}	260	}
259		261
260	fs_va = as_get_mappable_page(comm_size);	262	fs_va = as_get_mappable_page(comm_size);
261	if (fs_va == NULL) {	263	if (fs_va == NULL) {
262	ipc_answer_0(callid, EHANGUP);	264	ipc_answer_0(callid, EHANGUP);
263	return;	265	return;
264	}	266	}
265		267
266	(void) ipc_share_out_finalize(callid, fs_va);	268	(void) ipc_share_out_finalize(callid, fs_va);
267		269
268	while (1) {	270	while (1) {
269	callid = async_get_call(&call);	271	callid = async_get_call(&call);
270	method = IPC_GET_METHOD(call);	272	method = IPC_GET_METHOD(call);
271	switch (method) {	273	switch (method) {
272	case IPC_M_PHONE_HUNGUP:	274	case IPC_M_PHONE_HUNGUP:
273	/* The other side has hung up. */	275	/* The other side has hung up. */
274	ipc_answer_0(callid, EOK);	276	ipc_answer_0(callid, EOK);
275	return;	277	return;
276	case BD_READ_BLOCK:	278	case BD_READ_BLOCK:
277	case BD_WRITE_BLOCK:	279	case BD_WRITE_BLOCK:
278	idx = IPC_GET_ARG1(call);	280	idx = IPC_GET_ARG1(call);
279	size = IPC_GET_ARG2(call);	281	size = IPC_GET_ARG2(call);
280	if (size > comm_size) {	282	if (size > comm_size) {
281	retval = EINVAL;	283	retval = EINVAL;
282	break;	284	break;
283	}	285	}
284	retval = ata_bd_rdwr(disk_id, method, idx,	286	retval = ata_bd_rdwr(disk_id, method, idx,
285	size, fs_va);	287	size, fs_va);
286	break;	288	break;
287	default:	289	default:
288	retval = EINVAL;	290	retval = EINVAL;
289	break;	291	break;
290	}	292	}
291	ipc_answer_0(callid, retval);	293	ipc_answer_0(callid, retval);
292	}	294	}
293	}	295	}
294		296
295	static int ata_bd_rdwr(int disk_id, ipcarg_t method, off_t blk_idx, off_t size,	297	static int ata_bd_rdwr(int disk_id, ipcarg_t method, off_t blk_idx, off_t size,
296	void *buf)	298	void *buf)
297	{	299	{
298	int rc;	300	int rc;
299	off_t now;	301	off_t now;
300		302
301	while (size > 0) {	303	while (size > 0) {
302	now = size < block_size ? size : (off_t) block_size;	304	now = size < block_size ? size : (off_t) block_size;
303	if (now != block_size)	305	if (now != block_size)
304	return EINVAL;	306	return EINVAL;
305		307
306	if (method == BD_READ_BLOCK)	308	if (method == BD_READ_BLOCK)
307	rc = ata_bd_read_block(disk_id, blk_idx, 1, buf);	309	rc = ata_bd_read_block(disk_id, blk_idx, 1, buf);
308	else	310	else
309	rc = ENOTSUP;	311	rc = ata_bd_write_block(disk_id, blk_idx, 1, buf);
310		312
311	if (rc != EOK)	313	if (rc != EOK)
312	return rc;	314	return rc;
313		315
314	buf += block_size;	316	buf += block_size;
315	blk_idx++;	317	blk_idx++;
316		318
317	if (size > block_size)	319	if (size > block_size)
318	size -= block_size;	320	size -= block_size;
319	else	321	else
320	size = 0;	322	size = 0;
321	}	323	}
322		324
323	return EOK;	325	return EOK;
324	}	326	}
325		327
326		328
327	static int ata_bd_read_block(int disk_id, uint64_t blk_idx, size_t blk_cnt,	329	static int ata_bd_read_block(int disk_id, uint64_t blk_idx, size_t blk_cnt,
328	void *buf)	330	void *buf)
329	{	331	{
330	size_t i;	332	size_t i;
331	uint16_t data;	333	uint16_t data;
332	uint8_t status;	334	uint8_t status;
333	uint64_t c, h, s;	335	uint64_t c, h, s;
334	uint64_t idx;	336	uint64_t idx;
335	uint8_t drv_head;	337	uint8_t drv_head;
336	disk_t *d;	338	disk_t *d;
337		339
338	d = &disk[disk_id];	340	d = &disk[disk_id];
339		341
340	/* Check device bounds. */	342	/* Check device bounds. */
341	if (blk_idx >= d->blocks)	343	if (blk_idx >= d->blocks)
342	return EINVAL;	344	return EINVAL;
343		345
344	/* Compute CHS. */	346	/* Compute CHS. */
345	c = blk_idx / (d->heads * d->sectors);	347	c = blk_idx / (d->heads * d->sectors);
346	idx = blk_idx % (d->heads * d->sectors);	348	idx = blk_idx % (d->heads * d->sectors);
347		349
348	h = idx / d->sectors;	350	h = idx / d->sectors;
349	s = 1 + (idx % d->sectors);	351	s = 1 + (idx % d->sectors);
350		352
351	/* New value for Drive/Head register */	353	/* New value for Drive/Head register */
352	drv_head =	354	drv_head =
353	((disk_id != 0) ? DHR_DRV : 0) \|	355	((disk_id != 0) ? DHR_DRV : 0) \|
354	(h & 0x0f);	356	(h & 0x0f);
355		357
356	futex_down(&dev_futex);	358	futex_down(&dev_futex);
357		359
358	/* Program a Read Sectors operation. */	360	/* Program a Read Sectors operation. */
359		361
360	pio_write_8(&cmd->drive_head, drv_head);	362	pio_write_8(&cmd->drive_head, drv_head);
361	pio_write_8(&cmd->sector_count, 1);	363	pio_write_8(&cmd->sector_count, 1);
362	pio_write_8(&cmd->sector_number, s);	364	pio_write_8(&cmd->sector_number, s);
363	pio_write_8(&cmd->cylinder_low, c & 0xff);	365	pio_write_8(&cmd->cylinder_low, c & 0xff);
364	pio_write_8(&cmd->cylinder_high, c >> 16);	366	pio_write_8(&cmd->cylinder_high, c >> 16);
365	pio_write_8(&cmd->command, CMD_READ_SECTORS);	367	pio_write_8(&cmd->command, CMD_READ_SECTORS);
366		368
367	/* Read data from the disk buffer. */	369	/* Read data from the disk buffer. */
368		370
369	for (i = 0; i < block_size / 2; i++) {	371	for (i = 0; i < block_size / 2; i++) {
370	do {	372	do {
371	status = pio_read_8(&cmd->status);	373	status = pio_read_8(&cmd->status);
372	} while ((status & SR_DRDY) == 0);	374	} while ((status & SR_DRDY) == 0);
373		375
374	data = pio_read_16(&cmd->data_port);	376	data = pio_read_16(&cmd->data_port);
375	((uint16_t *) buf)[i] = data;	377	((uint16_t *) buf)[i] = data;
376	}	378	}
-		379
-		380	futex_up(&dev_futex);
-		381	return EOK;
-		382	}
-		383
-		384	static int ata_bd_write_block(int disk_id, uint64_t blk_idx, size_t blk_cnt,
-		385	const void *buf)
-		386	{
-		387	size_t i;
-		388	uint8_t status;
-		389	uint64_t c, h, s;
-		390	uint64_t idx;
-		391	uint8_t drv_head;
-		392	disk_t *d;
-		393
-		394	d = &disk[disk_id];
-		395
-		396	/* Check device bounds. */
-		397	if (blk_idx >= d->blocks)
-		398	return EINVAL;
-		399
-		400	/* Compute CHS. */
-		401	c = blk_idx / (d->heads * d->sectors);
-		402	idx = blk_idx % (d->heads * d->sectors);
-		403
-		404	h = idx / d->sectors;
-		405	s = 1 + (idx % d->sectors);
-		406
-		407	/* New value for Drive/Head register */
-		408	drv_head =
-		409	((disk_id != 0) ? DHR_DRV : 0) \|
-		410	(h & 0x0f);
-		411
-		412	futex_down(&dev_futex);
-		413
-		414	/* Program a Read Sectors operation. */
-		415
-		416	pio_write_8(&cmd->drive_head, drv_head);
-		417	pio_write_8(&cmd->sector_count, 1);
-		418	pio_write_8(&cmd->sector_number, s);
-		419	pio_write_8(&cmd->cylinder_low, c & 0xff);
-		420	pio_write_8(&cmd->cylinder_high, c >> 16);
-		421	pio_write_8(&cmd->command, CMD_WRITE_SECTORS);
-		422
-		423	/* Write data to the disk buffer. */
-		424
-		425	for (i = 0; i < block_size / 2; i++) {
-		426	do {
-		427	status = pio_read_8(&cmd->status);
-		428	} while ((status & SR_DRDY) == 0);
-		429
-		430	pio_write_16(&cmd->data_port, ((uint16_t *) buf)[i]);
-		431	}
377		432
378	futex_up(&dev_futex);	433	futex_up(&dev_futex);
379	return EOK;	434	return EOK;
380	}	435	}
381		436
382		437
383	/**	438	/**
384	* @}	439	* @}
385	*/	440	*/
386		441

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(root)/trunk/uspace/srv/bd/ata_bd/ata_bd.c – Rev 4531 → 4532