[deliverable/linux.git] / sound / pci / asihpi / hpioctl.c

/*******************************************************************************

    AudioScience HPI driver
    Copyright (C) 1997-2011  AudioScience Inc. <support@audioscience.com>

    This program is free software; you can redistribute it and/or modify
    it under the terms of version 2 of the GNU General Public License as
    published by the Free Software Foundation;

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

Common Linux HPI ioctl and module probe/remove functions
*******************************************************************************/
#define SOURCEFILE_NAME "hpioctl.c"

#include "hpi_internal.h"
#include "hpi_version.h"
#include "hpimsginit.h"
#include "hpidebug.h"
#include "hpimsgx.h"
#include "hpioctl.h"
#include "hpicmn.h"

#include <linux/fs.h>
#include <linux/slab.h>
#include <linux/moduleparam.h>
#include <asm/uaccess.h>
#include <linux/pci.h>
#include <linux/stringify.h>
#include <linux/module.h>

#ifdef MODULE_FIRMWARE
MODULE_FIRMWARE("asihpi/dsp5000.bin");
MODULE_FIRMWARE("asihpi/dsp6200.bin");
MODULE_FIRMWARE("asihpi/dsp6205.bin");
MODULE_FIRMWARE("asihpi/dsp6400.bin");
MODULE_FIRMWARE("asihpi/dsp6600.bin");
MODULE_FIRMWARE("asihpi/dsp8700.bin");
MODULE_FIRMWARE("asihpi/dsp8900.bin");
#endif

static int prealloc_stream_buf;
module_param(prealloc_stream_buf, int, S_IRUGO);
MODULE_PARM_DESC(prealloc_stream_buf,
	"Preallocate size for per-adapter stream buffer");

/* Allow the debug level to be changed after module load.
 E.g.   echo 2 > /sys/module/asihpi/parameters/hpiDebugLevel
*/
module_param(hpi_debug_level, int, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(hpi_debug_level, "debug verbosity 0..5");

/* List of adapters found */
static struct hpi_adapter adapters[HPI_MAX_ADAPTERS];

/* Wrapper function to HPI_Message to enable dumping of the
   message and response types.
*/
static void hpi_send_recv_f(struct hpi_message *phm, struct hpi_response *phr,
	struct file *file)
{
	int adapter = phm->adapter_index;

	if ((adapter >= HPI_MAX_ADAPTERS || adapter < 0)
		&& (phm->object != HPI_OBJ_SUBSYSTEM))
		phr->error = HPI_ERROR_INVALID_OBJ_INDEX;
	else
		hpi_send_recv_ex(phm, phr, file);
}

/* This is called from hpifunc.c functions, called by ALSA
 * (or other kernel process) In this case there is no file descriptor
 * available for the message cache code
 */
void hpi_send_recv(struct hpi_message *phm, struct hpi_response *phr)
{
	hpi_send_recv_f(phm, phr, HOWNER_KERNEL);
}

EXPORT_SYMBOL(hpi_send_recv);
/* for radio-asihpi */

int asihpi_hpi_release(struct file *file)
{
	struct hpi_message hm;
	struct hpi_response hr;

/* HPI_DEBUG_LOG(INFO,"hpi_release file %p, pid %d\n", file, current->pid); */
	/* close the subsystem just in case the application forgot to. */
	hpi_init_message_response(&hm, &hr, HPI_OBJ_SUBSYSTEM,
		HPI_SUBSYS_CLOSE);
	hpi_send_recv_ex(&hm, &hr, file);
	return 0;
}

long asihpi_hpi_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
	struct hpi_ioctl_linux __user *phpi_ioctl_data;
	void __user *puhm;
	void __user *puhr;
	union hpi_message_buffer_v1 *hm;
	union hpi_response_buffer_v1 *hr;
	u16 res_max_size;
	u32 uncopied_bytes;
	int err = 0;

	if (cmd != HPI_IOCTL_LINUX)
		return -EINVAL;

	hm = kmalloc(sizeof(*hm), GFP_KERNEL);
	hr = kmalloc(sizeof(*hr), GFP_KERNEL);
	if (!hm || !hr) {
		err = -ENOMEM;
		goto out;
	}

	phpi_ioctl_data = (struct hpi_ioctl_linux __user *)arg;

	/* Read the message and response pointers from user space.  */
	if (get_user(puhm, &phpi_ioctl_data->phm)
		|| get_user(puhr, &phpi_ioctl_data->phr)) {
		err = -EFAULT;
		goto out;
	}

	/* Now read the message size and data from user space.  */
	if (get_user(hm->h.size, (u16 __user *)puhm)) {
		err = -EFAULT;
		goto out;
	}
	if (hm->h.size > sizeof(*hm))
		hm->h.size = sizeof(*hm);

	/* printk(KERN_INFO "message size %d\n", hm->h.wSize); */

	uncopied_bytes = copy_from_user(hm, puhm, hm->h.size);
	if (uncopied_bytes) {
		HPI_DEBUG_LOG(ERROR, "uncopied bytes %d\n", uncopied_bytes);
		err = -EFAULT;
		goto out;
	}

	if (get_user(res_max_size, (u16 __user *)puhr)) {
		err = -EFAULT;
		goto out;
	}
	/* printk(KERN_INFO "user response size %d\n", res_max_size); */
	if (res_max_size < sizeof(struct hpi_response_header)) {
		HPI_DEBUG_LOG(WARNING, "small res size %d\n", res_max_size);
		err = -EFAULT;
		goto out;
	}

	switch (hm->h.function) {
	case HPI_SUBSYS_CREATE_ADAPTER:
	case HPI_ADAPTER_DELETE:
		/* Application must not use these functions! */
		hr->h.size = sizeof(hr->h);
		hr->h.error = HPI_ERROR_INVALID_OPERATION;
		hr->h.function = hm->h.function;
		uncopied_bytes = copy_to_user(puhr, hr, hr->h.size);
		if (uncopied_bytes)
			err = -EFAULT;
		else
			err = 0;
		goto out;
	}

	hr->h.size = res_max_size;
	if (hm->h.object == HPI_OBJ_SUBSYSTEM) {
		hpi_send_recv_f(&hm->m0, &hr->r0, file);
	} else {
		u16 __user *ptr = NULL;
		u32 size = 0;
		u32 adapter_present;
		/* -1=no data 0=read from user mem, 1=write to user mem */
		int wrflag = -1;
		struct hpi_adapter *pa;

		if (hm->h.adapter_index < HPI_MAX_ADAPTERS) {
			pa = &adapters[hm->h.adapter_index];
			adapter_present = pa->type;
		} else {
			adapter_present = 0;
		}

		if (!adapter_present) {
			hpi_init_response(&hr->r0, hm->h.object,
				hm->h.function, HPI_ERROR_BAD_ADAPTER_NUMBER);

			uncopied_bytes =
				copy_to_user(puhr, hr, sizeof(hr->h));
			if (uncopied_bytes)
				err = -EFAULT;
			else
				err = 0;
			goto out;
		}

		if (mutex_lock_interruptible(&pa->mutex)) {
			err = -EINTR;
			goto out;
		}

		/* Dig out any pointers embedded in the message.  */
		switch (hm->h.function) {
		case HPI_OSTREAM_WRITE:
		case HPI_ISTREAM_READ:{
				/* Yes, sparse, this is correct. */
				ptr = (u16 __user *)hm->m0.u.d.u.data.pb_data;
				size = hm->m0.u.d.u.data.data_size;

				/* Allocate buffer according to application request.
				   ?Is it better to alloc/free for the duration
				   of the transaction?
				 */
				if (pa->buffer_size < size) {
					HPI_DEBUG_LOG(DEBUG,
						"Realloc adapter %d stream "
						"buffer from %zd to %d\n",
						hm->h.adapter_index,
						pa->buffer_size, size);
					if (pa->p_buffer) {
						pa->buffer_size = 0;
						vfree(pa->p_buffer);
					}
					pa->p_buffer = vmalloc(size);
					if (pa->p_buffer)
						pa->buffer_size = size;
					else {
						HPI_DEBUG_LOG(ERROR,
							"HPI could not allocate "
							"stream buffer size %d\n",
							size);

						mutex_unlock(&pa->mutex);
						err = -EINVAL;
						goto out;
					}
				}

				hm->m0.u.d.u.data.pb_data = pa->p_buffer;
				if (hm->h.function == HPI_ISTREAM_READ)
					/* from card, WRITE to user mem */
					wrflag = 1;
				else
					wrflag = 0;
				break;
			}

		default:
			size = 0;
			break;
		}

		if (size && (wrflag == 0)) {
			uncopied_bytes =
				copy_from_user(pa->p_buffer, ptr, size);
			if (uncopied_bytes)
				HPI_DEBUG_LOG(WARNING,
					"Missed %d of %d "
					"bytes from user\n", uncopied_bytes,
					size);
		}

		hpi_send_recv_f(&hm->m0, &hr->r0, file);

		if (size && (wrflag == 1)) {
			uncopied_bytes =
				copy_to_user(ptr, pa->p_buffer, size);
			if (uncopied_bytes)
				HPI_DEBUG_LOG(WARNING,
					"Missed %d of %d " "bytes to user\n",
					uncopied_bytes, size);
		}

		mutex_unlock(&pa->mutex);
	}

	/* on return response size must be set */
	/*printk(KERN_INFO "response size %d\n", hr->h.wSize); */

	if (!hr->h.size) {
		HPI_DEBUG_LOG(ERROR, "response zero size\n");
		err = -EFAULT;
		goto out;
	}

	if (hr->h.size > res_max_size) {
		HPI_DEBUG_LOG(ERROR, "response too big %d %d\n", hr->h.size,
			res_max_size);
		hr->h.error = HPI_ERROR_RESPONSE_BUFFER_TOO_SMALL;
		hr->h.specific_error = hr->h.size;
		hr->h.size = sizeof(hr->h);
	}

	uncopied_bytes = copy_to_user(puhr, hr, hr->h.size);
	if (uncopied_bytes) {
		HPI_DEBUG_LOG(ERROR, "uncopied bytes %d\n", uncopied_bytes);
		err = -EFAULT;
		goto out;
	}

out:
	kfree(hm);
	kfree(hr);
	return err;
}

int __devinit asihpi_adapter_probe(struct pci_dev *pci_dev,
	const struct pci_device_id *pci_id)
{
	int idx, nm;
	unsigned int memlen;
	struct hpi_message hm;
	struct hpi_response hr;
	struct hpi_adapter adapter;
	struct hpi_pci pci;

	memset(&adapter, 0, sizeof(adapter));

	dev_printk(KERN_DEBUG, &pci_dev->dev,
		"probe %04x:%04x,%04x:%04x,%04x\n", pci_dev->vendor,
		pci_dev->device, pci_dev->subsystem_vendor,
		pci_dev->subsystem_device, pci_dev->devfn);

	if (pci_enable_device(pci_dev) < 0) {
		dev_printk(KERN_ERR, &pci_dev->dev,
			"pci_enable_device failed, disabling device\n");
		return -EIO;
	}

	pci_set_master(pci_dev);	/* also sets latency timer if < 16 */

	hpi_init_message_response(&hm, &hr, HPI_OBJ_SUBSYSTEM,
		HPI_SUBSYS_CREATE_ADAPTER);
	hpi_init_response(&hr, HPI_OBJ_SUBSYSTEM, HPI_SUBSYS_CREATE_ADAPTER,
		HPI_ERROR_PROCESSING_MESSAGE);

	hm.adapter_index = HPI_ADAPTER_INDEX_INVALID;

	adapter.pci = pci_dev;

	nm = HPI_MAX_ADAPTER_MEM_SPACES;

	for (idx = 0; idx < nm; idx++) {
		HPI_DEBUG_LOG(INFO, "resource %d %pR\n", idx,
			&pci_dev->resource[idx]);

		if (pci_resource_flags(pci_dev, idx) & IORESOURCE_MEM) {
			memlen = pci_resource_len(pci_dev, idx);
			adapter.ap_remapped_mem_base[idx] =
				ioremap(pci_resource_start(pci_dev, idx),
				memlen);
			if (!adapter.ap_remapped_mem_base[idx]) {
				HPI_DEBUG_LOG(ERROR,
					"ioremap failed, aborting\n");
				/* unmap previously mapped pci mem space */
				goto err;
			}
		}

		pci.ap_mem_base[idx] = adapter.ap_remapped_mem_base[idx];
	}

	pci.pci_dev = pci_dev;
	hm.u.s.resource.bus_type = HPI_BUS_PCI;
	hm.u.s.resource.r.pci = &pci;

	/* call CreateAdapterObject on the relevant hpi module */
	hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
	if (hr.error)
		goto err;

	if (prealloc_stream_buf) {
		adapter.p_buffer = vmalloc(prealloc_stream_buf);
		if (!adapter.p_buffer) {
			HPI_DEBUG_LOG(ERROR,
				"HPI could not allocate "
				"kernel buffer size %d\n",
				prealloc_stream_buf);
			goto err;
		}
	}

	adapter.index = hr.u.s.adapter_index;
	adapter.type = hr.u.s.adapter_type;

	hpi_init_message_response(&hm, &hr, HPI_OBJ_ADAPTER,
		HPI_ADAPTER_OPEN);
	hm.adapter_index = adapter.index;
	hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);

	if (hr.error)
		goto err;

	adapter.snd_card_asihpi = NULL;
	/* WARNING can't init mutex in 'adapter'
	 * and then copy it to adapters[] ?!?!
	 */
	adapters[adapter.index] = adapter;
	mutex_init(&adapters[adapter.index].mutex);
	pci_set_drvdata(pci_dev, &adapters[adapter.index]);

	dev_printk(KERN_INFO, &pci_dev->dev,
		"probe succeeded for ASI%04X HPI index %d\n", adapter.type,
		adapter.index);

	return 0;

err:
	for (idx = 0; idx < HPI_MAX_ADAPTER_MEM_SPACES; idx++) {
		if (adapter.ap_remapped_mem_base[idx]) {
			iounmap(adapter.ap_remapped_mem_base[idx]);
			adapter.ap_remapped_mem_base[idx] = NULL;
		}
	}

	if (adapter.p_buffer) {
		adapter.buffer_size = 0;
		vfree(adapter.p_buffer);
	}

	HPI_DEBUG_LOG(ERROR, "adapter_probe failed\n");
	return -ENODEV;
}

void __devexit asihpi_adapter_remove(struct pci_dev *pci_dev)
{
	int idx;
	struct hpi_message hm;
	struct hpi_response hr;
	struct hpi_adapter *pa;
	pa = pci_get_drvdata(pci_dev);

	hpi_init_message_response(&hm, &hr, HPI_OBJ_ADAPTER,
		HPI_ADAPTER_DELETE);
	hm.adapter_index = pa->index;
	hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);

	/* unmap PCI memory space, mapped during device init. */
	for (idx = 0; idx < HPI_MAX_ADAPTER_MEM_SPACES; idx++) {
		if (pa->ap_remapped_mem_base[idx]) {
			iounmap(pa->ap_remapped_mem_base[idx]);
			pa->ap_remapped_mem_base[idx] = NULL;
		}
	}

	if (pa->p_buffer)
		vfree(pa->p_buffer);

	pci_set_drvdata(pci_dev, NULL);
	if (1)
		dev_printk(KERN_INFO, &pci_dev->dev,
			"remove %04x:%04x,%04x:%04x,%04x," " HPI index %d.\n",
			pci_dev->vendor, pci_dev->device,
			pci_dev->subsystem_vendor, pci_dev->subsystem_device,
			pci_dev->devfn, pa->index);

	memset(pa, 0, sizeof(*pa));
}

void __init asihpi_init(void)
{
	struct hpi_message hm;
	struct hpi_response hr;

	memset(adapters, 0, sizeof(adapters));

	printk(KERN_INFO "ASIHPI driver " HPI_VER_STRING "\n");

	hpi_init_message_response(&hm, &hr, HPI_OBJ_SUBSYSTEM,
		HPI_SUBSYS_DRIVER_LOAD);
	hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
}

void asihpi_exit(void)
{
	struct hpi_message hm;
	struct hpi_response hr;

	hpi_init_message_response(&hm, &hr, HPI_OBJ_SUBSYSTEM,
		HPI_SUBSYS_DRIVER_UNLOAD);
	hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
}
Commit	Line	Data
719f82d3 EB	1	/*******************************************************************************
	2
	3	AudioScience HPI driver
1c073b67	4	Copyright (C) 1997-2011 AudioScience Inc. <support@audioscience.com>
719f82d3 EB	5
	6	This program is free software; you can redistribute it and/or modify
	7	it under the terms of version 2 of the GNU General Public License as
	8	published by the Free Software Foundation;
	9
	10	This program is distributed in the hope that it will be useful,
	11	but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	GNU General Public License for more details.
	14
	15	You should have received a copy of the GNU General Public License
	16	along with this program; if not, write to the Free Software
	17	Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	18
	19	Common Linux HPI ioctl and module probe/remove functions
	20	*******************************************************************************/
	21	#define SOURCEFILE_NAME "hpioctl.c"
	22
	23	#include "hpi_internal.h"
f6baaec2	24	#include "hpi_version.h"
719f82d3 EB	25	#include "hpimsginit.h"
	26	#include "hpidebug.h"
	27	#include "hpimsgx.h"
	28	#include "hpioctl.h"
6d0b898e	29	#include "hpicmn.h"
719f82d3 EB	30
	31	#include <linux/fs.h>
	32	#include <linux/slab.h>
	33	#include <linux/moduleparam.h>
	34	#include <asm/uaccess.h>
3285ea10	35	#include <linux/pci.h>
719f82d3	36	#include <linux/stringify.h>
da155d5b	37	#include <linux/module.h>
719f82d3 EB	38
	39	#ifdef MODULE_FIRMWARE
	40	MODULE_FIRMWARE("asihpi/dsp5000.bin");
	41	MODULE_FIRMWARE("asihpi/dsp6200.bin");
	42	MODULE_FIRMWARE("asihpi/dsp6205.bin");
	43	MODULE_FIRMWARE("asihpi/dsp6400.bin");
	44	MODULE_FIRMWARE("asihpi/dsp6600.bin");
	45	MODULE_FIRMWARE("asihpi/dsp8700.bin");
	46	MODULE_FIRMWARE("asihpi/dsp8900.bin");
	47	#endif
	48
	49	static int prealloc_stream_buf;
	50	module_param(prealloc_stream_buf, int, S_IRUGO);
	51	MODULE_PARM_DESC(prealloc_stream_buf,
3285ea10	52	"Preallocate size for per-adapter stream buffer");
719f82d3 EB	53
	54	/* Allow the debug level to be changed after module load.
	55	E.g. echo 2 > /sys/module/asihpi/parameters/hpiDebugLevel
	56	*/
	57	module_param(hpi_debug_level, int, S_IRUGO \| S_IWUSR);
	58	MODULE_PARM_DESC(hpi_debug_level, "debug verbosity 0..5");
	59
	60	/* List of adapters found */
	61	static struct hpi_adapter adapters[HPI_MAX_ADAPTERS];
	62
	63	/* Wrapper function to HPI_Message to enable dumping of the
	64	message and response types.
	65	*/
	66	static void hpi_send_recv_f(struct hpi_message phm, struct hpi_response phr,
	67	struct file *file)
	68	{
	69	int adapter = phm->adapter_index;
	70
	71	if ((adapter >= HPI_MAX_ADAPTERS \|\| adapter < 0)
	72	&& (phm->object != HPI_OBJ_SUBSYSTEM))
	73	phr->error = HPI_ERROR_INVALID_OBJ_INDEX;
	74	else
	75	hpi_send_recv_ex(phm, phr, file);
	76	}
	77
	78	/* This is called from hpifunc.c functions, called by ALSA
	79	* (or other kernel process) In this case there is no file descriptor
	80	* available for the message cache code
	81	*/
	82	void hpi_send_recv(struct hpi_message phm, struct hpi_response phr)
	83	{
	84	hpi_send_recv_f(phm, phr, HOWNER_KERNEL);
	85	}
	86
	87	EXPORT_SYMBOL(hpi_send_recv);
	88	/* for radio-asihpi */
	89
	90	int asihpi_hpi_release(struct file *file)
	91	{
	92	struct hpi_message hm;
	93	struct hpi_response hr;
	94
	95	/* HPI_DEBUG_LOG(INFO,"hpi_release file %p, pid %d\n", file, current->pid); */
	96	/* close the subsystem just in case the application forgot to. */
	97	hpi_init_message_response(&hm, &hr, HPI_OBJ_SUBSYSTEM,
	98	HPI_SUBSYS_CLOSE);
	99	hpi_send_recv_ex(&hm, &hr, file);
	100	return 0;
	101	}
	102
	103	long asihpi_hpi_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
	104	{
	105	struct hpi_ioctl_linux __user *phpi_ioctl_data;
	106	void __user *puhm;
	107	void __user *puhr;
	108	union hpi_message_buffer_v1 *hm;
	109	union hpi_response_buffer_v1 *hr;
	110	u16 res_max_size;
	111	u32 uncopied_bytes;
719f82d3 EB	112	int err = 0;
	113
	114	if (cmd != HPI_IOCTL_LINUX)
	115	return -EINVAL;
	116
	117	hm = kmalloc(sizeof(*hm), GFP_KERNEL);
	118	hr = kmalloc(sizeof(*hr), GFP_KERNEL);
	119	if (!hm \|\| !hr) {
	120	err = -ENOMEM;
	121	goto out;
	122	}
	123
	124	phpi_ioctl_data = (struct hpi_ioctl_linux __user *)arg;
	125
	126	/* Read the message and response pointers from user space. */
3285ea10 EB	127	if (get_user(puhm, &phpi_ioctl_data->phm)
3285ea10 EB	128	\|\| get_user(puhr, &phpi_ioctl_data->phr)) {
ec9d04b2 KV	129	err = -EFAULT;
	130	goto out;
	131	}
719f82d3 EB	132
719f82d3 EB	133	/* Now read the message size and data from user space. */
ec9d04b2 KV	134	if (get_user(hm->h.size, (u16 __user *)puhm)) {
	135	err = -EFAULT;
	136	goto out;
	137	}
719f82d3 EB	138	if (hm->h.size > sizeof(*hm))
	139	hm->h.size = sizeof(*hm);
	140
3285ea10	141	/* printk(KERN_INFO "message size %d\n", hm->h.wSize); */
719f82d3 EB	142
	143	uncopied_bytes = copy_from_user(hm, puhm, hm->h.size);
	144	if (uncopied_bytes) {
	145	HPI_DEBUG_LOG(ERROR, "uncopied bytes %d\n", uncopied_bytes);
	146	err = -EFAULT;
	147	goto out;
	148	}
	149
ec9d04b2 KV	150	if (get_user(res_max_size, (u16 __user *)puhr)) {
	151	err = -EFAULT;
	152	goto out;
	153	}
719f82d3 EB	154	/* printk(KERN_INFO "user response size %d\n", res_max_size); */
	155	if (res_max_size < sizeof(struct hpi_response_header)) {
	156	HPI_DEBUG_LOG(WARNING, "small res size %d\n", res_max_size);
	157	err = -EFAULT;
	158	goto out;
	159	}
	160
6d0b898e EB	161	switch (hm->h.function) {
	162	case HPI_SUBSYS_CREATE_ADAPTER:
	163	case HPI_ADAPTER_DELETE:
	164	/* Application must not use these functions! */
	165	hr->h.size = sizeof(hr->h);
	166	hr->h.error = HPI_ERROR_INVALID_OPERATION;
	167	hr->h.function = hm->h.function;
	168	uncopied_bytes = copy_to_user(puhr, hr, hr->h.size);
	169	if (uncopied_bytes)
	170	err = -EFAULT;
	171	else
	172	err = 0;
	173	goto out;
	174	}
	175
3285ea10	176	hr->h.size = res_max_size;
719f82d3	177	if (hm->h.object == HPI_OBJ_SUBSYSTEM) {
6d0b898e	178	hpi_send_recv_f(&hm->m0, &hr->r0, file);
719f82d3 EB	179	} else {
	180	u16 __user *ptr = NULL;
	181	u32 size = 0;
08f984c7	182	u32 adapter_present;
719f82d3 EB	183	/* -1=no data 0=read from user mem, 1=write to user mem */
719f82d3 EB	184	int wrflag = -1;
08f984c7 EB	185	struct hpi_adapter *pa;
	186
	187	if (hm->h.adapter_index < HPI_MAX_ADAPTERS) {
	188	pa = &adapters[hm->h.adapter_index];
	189	adapter_present = pa->type;
	190	} else {
	191	adapter_present = 0;
	192	}
719f82d3	193
08f984c7 EB	194	if (!adapter_present) {
	195	hpi_init_response(&hr->r0, hm->h.object,
	196	hm->h.function, HPI_ERROR_BAD_ADAPTER_NUMBER);
719f82d3 EB	197
	198	uncopied_bytes =
	199	copy_to_user(puhr, hr, sizeof(hr->h));
	200	if (uncopied_bytes)
	201	err = -EFAULT;
	202	else
	203	err = 0;
	204	goto out;
	205	}
	206
767cd365	207	if (mutex_lock_interruptible(&pa->mutex)) {
719f82d3 EB	208	err = -EINTR;
	209	goto out;
	210	}
	211
	212	/* Dig out any pointers embedded in the message. */
	213	switch (hm->h.function) {
	214	case HPI_OSTREAM_WRITE:
	215	case HPI_ISTREAM_READ:{
	216	/* Yes, sparse, this is correct. */
	217	ptr = (u16 __user *)hm->m0.u.d.u.data.pb_data;
	218	size = hm->m0.u.d.u.data.data_size;
	219
	220	/* Allocate buffer according to application request.
	221	?Is it better to alloc/free for the duration
	222	of the transaction?
	223	*/
	224	if (pa->buffer_size < size) {
	225	HPI_DEBUG_LOG(DEBUG,
3285ea10	226	"Realloc adapter %d stream "
719f82d3 EB	227	"buffer from %zd to %d\n",
	228	hm->h.adapter_index,
	229	pa->buffer_size, size);
	230	if (pa->p_buffer) {
	231	pa->buffer_size = 0;
	232	vfree(pa->p_buffer);
	233	}
	234	pa->p_buffer = vmalloc(size);
	235	if (pa->p_buffer)
	236	pa->buffer_size = size;
	237	else {
	238	HPI_DEBUG_LOG(ERROR,
	239	"HPI could not allocate "
	240	"stream buffer size %d\n",
	241	size);
	242
767cd365	243	mutex_unlock(&pa->mutex);
719f82d3 EB	244	err = -EINVAL;
	245	goto out;
	246	}
	247	}
	248
	249	hm->m0.u.d.u.data.pb_data = pa->p_buffer;
	250	if (hm->h.function == HPI_ISTREAM_READ)
	251	/* from card, WRITE to user mem */
	252	wrflag = 1;
	253	else
	254	wrflag = 0;
	255	break;
	256	}
	257
	258	default:
	259	size = 0;
	260	break;
	261	}
	262
	263	if (size && (wrflag == 0)) {
	264	uncopied_bytes =
	265	copy_from_user(pa->p_buffer, ptr, size);
	266	if (uncopied_bytes)
	267	HPI_DEBUG_LOG(WARNING,
3285ea10	268	"Missed %d of %d "
719f82d3 EB	269	"bytes from user\n", uncopied_bytes,
	270	size);
	271	}
	272
	273	hpi_send_recv_f(&hm->m0, &hr->r0, file);
	274
	275	if (size && (wrflag == 1)) {
	276	uncopied_bytes =
	277	copy_to_user(ptr, pa->p_buffer, size);
	278	if (uncopied_bytes)
	279	HPI_DEBUG_LOG(WARNING,
3285ea10	280	"Missed %d of %d " "bytes to user\n",
719f82d3 EB	281	uncopied_bytes, size);
	282	}
	283
767cd365	284	mutex_unlock(&pa->mutex);
719f82d3 EB	285	}
	286
	287	/* on return response size must be set */
	288	/printk(KERN_INFO "response size %d\n", hr->h.wSize); /
	289
	290	if (!hr->h.size) {
	291	HPI_DEBUG_LOG(ERROR, "response zero size\n");
	292	err = -EFAULT;
	293	goto out;
	294	}
	295
	296	if (hr->h.size > res_max_size) {
	297	HPI_DEBUG_LOG(ERROR, "response too big %d %d\n", hr->h.size,
	298	res_max_size);
3285ea10 EB	299	hr->h.error = HPI_ERROR_RESPONSE_BUFFER_TOO_SMALL;
	300	hr->h.specific_error = hr->h.size;
	301	hr->h.size = sizeof(hr->h);
719f82d3 EB	302	}
	303
	304	uncopied_bytes = copy_to_user(puhr, hr, hr->h.size);
	305	if (uncopied_bytes) {
	306	HPI_DEBUG_LOG(ERROR, "uncopied bytes %d\n", uncopied_bytes);
	307	err = -EFAULT;
	308	goto out;
	309	}
	310
	311	out:
	312	kfree(hm);
	313	kfree(hr);
	314	return err;
	315	}
	316
	317	int __devinit asihpi_adapter_probe(struct pci_dev *pci_dev,
	318	const struct pci_device_id *pci_id)
	319	{
42258dab	320	int idx, nm;
719f82d3 EB	321	unsigned int memlen;
	322	struct hpi_message hm;
	323	struct hpi_response hr;
	324	struct hpi_adapter adapter;
	325	struct hpi_pci pci;
	326
	327	memset(&adapter, 0, sizeof(adapter));
	328
3285ea10 EB	329	dev_printk(KERN_DEBUG, &pci_dev->dev,
	330	"probe %04x:%04x,%04x:%04x,%04x\n", pci_dev->vendor,
	331	pci_dev->device, pci_dev->subsystem_vendor,
719f82d3 EB	332	pci_dev->subsystem_device, pci_dev->devfn);
719f82d3 EB	333
3285ea10 EB	334	if (pci_enable_device(pci_dev) < 0) {
	335	dev_printk(KERN_ERR, &pci_dev->dev,
	336	"pci_enable_device failed, disabling device\n");
	337	return -EIO;
	338	}
	339
	340	pci_set_master(pci_dev); /* also sets latency timer if < 16 */
	341
719f82d3 EB	342	hpi_init_message_response(&hm, &hr, HPI_OBJ_SUBSYSTEM,
	343	HPI_SUBSYS_CREATE_ADAPTER);
	344	hpi_init_response(&hr, HPI_OBJ_SUBSYSTEM, HPI_SUBSYS_CREATE_ADAPTER,
	345	HPI_ERROR_PROCESSING_MESSAGE);
	346
3285ea10	347	hm.adapter_index = HPI_ADAPTER_INDEX_INVALID;
719f82d3	348
719f82d3 EB	349	adapter.pci = pci_dev;
	350
	351	nm = HPI_MAX_ADAPTER_MEM_SPACES;
	352
	353	for (idx = 0; idx < nm; idx++) {
42258dab EB	354	HPI_DEBUG_LOG(INFO, "resource %d %pR\n", idx,
42258dab EB	355	&pci_dev->resource[idx]);
719f82d3 EB	356
	357	if (pci_resource_flags(pci_dev, idx) & IORESOURCE_MEM) {
	358	memlen = pci_resource_len(pci_dev, idx);
	359	adapter.ap_remapped_mem_base[idx] =
	360	ioremap(pci_resource_start(pci_dev, idx),
	361	memlen);
	362	if (!adapter.ap_remapped_mem_base[idx]) {
	363	HPI_DEBUG_LOG(ERROR,
	364	"ioremap failed, aborting\n");
	365	/* unmap previously mapped pci mem space */
	366	goto err;
	367	}
	368	}
	369
	370	pci.ap_mem_base[idx] = adapter.ap_remapped_mem_base[idx];
	371	}
	372
3285ea10	373	pci.pci_dev = pci_dev;
719f82d3 EB	374	hm.u.s.resource.bus_type = HPI_BUS_PCI;
	375	hm.u.s.resource.r.pci = &pci;
	376
	377	/* call CreateAdapterObject on the relevant hpi module */
	378	hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
	379	if (hr.error)
	380	goto err;
	381
	382	if (prealloc_stream_buf) {
	383	adapter.p_buffer = vmalloc(prealloc_stream_buf);
	384	if (!adapter.p_buffer) {
	385	HPI_DEBUG_LOG(ERROR,
	386	"HPI could not allocate "
	387	"kernel buffer size %d\n",
	388	prealloc_stream_buf);
	389	goto err;
	390	}
	391	}
	392
	393	adapter.index = hr.u.s.adapter_index;
2f918a64	394	adapter.type = hr.u.s.adapter_type;
6d0b898e EB	395
	396	hpi_init_message_response(&hm, &hr, HPI_OBJ_ADAPTER,
	397	HPI_ADAPTER_OPEN);
719f82d3	398	hm.adapter_index = adapter.index;
6d0b898e	399	hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
719f82d3	400
6d0b898e	401	if (hr.error)
719f82d3 EB	402	goto err;
	403
	404	adapter.snd_card_asihpi = NULL;
	405	/* WARNING can't init mutex in 'adapter'
	406	* and then copy it to adapters[] ?!?!
	407	*/
6d0b898e	408	adapters[adapter.index] = adapter;
719f82d3 EB	409	mutex_init(&adapters[adapter.index].mutex);
	410	pci_set_drvdata(pci_dev, &adapters[adapter.index]);
	411
3285ea10 EB	412	dev_printk(KERN_INFO, &pci_dev->dev,
	413	"probe succeeded for ASI%04X HPI index %d\n", adapter.type,
	414	adapter.index);
719f82d3 EB	415
	416	return 0;
	417
	418	err:
	419	for (idx = 0; idx < HPI_MAX_ADAPTER_MEM_SPACES; idx++) {
	420	if (adapter.ap_remapped_mem_base[idx]) {
	421	iounmap(adapter.ap_remapped_mem_base[idx]);
	422	adapter.ap_remapped_mem_base[idx] = NULL;
	423	}
	424	}
	425
	426	if (adapter.p_buffer) {
	427	adapter.buffer_size = 0;
	428	vfree(adapter.p_buffer);
	429	}
	430
	431	HPI_DEBUG_LOG(ERROR, "adapter_probe failed\n");
	432	return -ENODEV;
	433	}
	434
	435	void __devexit asihpi_adapter_remove(struct pci_dev *pci_dev)
	436	{
	437	int idx;
	438	struct hpi_message hm;
	439	struct hpi_response hr;
	440	struct hpi_adapter *pa;
5dbea6b1	441	pa = pci_get_drvdata(pci_dev);
719f82d3	442
6d0b898e EB	443	hpi_init_message_response(&hm, &hr, HPI_OBJ_ADAPTER,
	444	HPI_ADAPTER_DELETE);
	445	hm.adapter_index = pa->index;
719f82d3 EB	446	hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
	447
	448	/* unmap PCI memory space, mapped during device init. */
	449	for (idx = 0; idx < HPI_MAX_ADAPTER_MEM_SPACES; idx++) {
	450	if (pa->ap_remapped_mem_base[idx]) {
	451	iounmap(pa->ap_remapped_mem_base[idx]);
	452	pa->ap_remapped_mem_base[idx] = NULL;
	453	}
	454	}
	455
c188dec3	456	if (pa->p_buffer)
719f82d3	457	vfree(pa->p_buffer);
719f82d3 EB	458
719f82d3 EB	459	pci_set_drvdata(pci_dev, NULL);
3285ea10 EB	460	if (1)
	461	dev_printk(KERN_INFO, &pci_dev->dev,
	462	"remove %04x:%04x,%04x:%04x,%04x," " HPI index %d.\n",
	463	pci_dev->vendor, pci_dev->device,
	464	pci_dev->subsystem_vendor, pci_dev->subsystem_device,
	465	pci_dev->devfn, pa->index);
c188dec3 EB	466
c188dec3 EB	467	memset(pa, 0, sizeof(*pa));
719f82d3 EB	468	}
	469
	470	void __init asihpi_init(void)
	471	{
	472	struct hpi_message hm;
	473	struct hpi_response hr;
	474
	475	memset(adapters, 0, sizeof(adapters));
	476
1dd6aaaa	477	printk(KERN_INFO "ASIHPI driver " HPI_VER_STRING "\n");
719f82d3 EB	478
	479	hpi_init_message_response(&hm, &hr, HPI_OBJ_SUBSYSTEM,
	480	HPI_SUBSYS_DRIVER_LOAD);
	481	hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
	482	}
	483
	484	void asihpi_exit(void)
	485	{
	486	struct hpi_message hm;
	487	struct hpi_response hr;
	488
	489	hpi_init_message_response(&hm, &hr, HPI_OBJ_SUBSYSTEM,
	490	HPI_SUBSYS_DRIVER_UNLOAD);
	491	hpi_send_recv_ex(&hm, &hr, HOWNER_KERNEL);
	492	}