[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 "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>

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