Commit 684b89bc authored by Sebastian Ott's avatar Sebastian Ott Committed by David S. Miller
Browse files

s390/ism: add device driver for internal shared memory 



Add support for the Internal Shared Memory vPCI Adapter.
This driver implements the interfaces of the SMC-D protocol.

Signed-off-by: default avatarSebastian Ott <sebott@linux.ibm.com>
Signed-off-by: default avatarUrsula Braun <ubraun@linux.ibm.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 4b1b7d3b

drivers/s390/net/Kconfig

+10 −0
Original line number Diff line number Diff line
@@ -95,4 +95,14 @@ config CCWGROUP 
	tristate

	default (LCS || CTCM || QETH)



config ISM

	tristate "Support for ISM vPCI Adapter"

	depends on PCI && SMC

	default n

	help

	  Select this option if you want to use the Internal Shared Memory

	  vPCI Adapter.



	  To compile as a module choose M. The module name is ism.

	  If unsure, choose N.

endmenu

drivers/s390/net/Makefile

+3 −0
Original line number Diff line number Diff line
@@ -15,3 +15,6 @@ qeth_l2-y += qeth_l2_main.o qeth_l2_sys.o 
obj-$(CONFIG_QETH_L2) += qeth_l2.o

qeth_l3-y += qeth_l3_main.o qeth_l3_sys.o

obj-$(CONFIG_QETH_L3) += qeth_l3.o



ism-y := ism_drv.o

obj-$(CONFIG_ISM) += ism.o

drivers/s390/net/ism.h

0 → 100644
+221 −0
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: GPL-2.0 */

#ifndef S390_ISM_H

#define S390_ISM_H



#include <linux/spinlock.h>

#include <linux/types.h>

#include <linux/pci.h>

#include <net/smc.h>



#define UTIL_STR_LEN	16



/*

 * Do not use the first word of the DMB bits to ensure 8 byte aligned access.

 */

#define ISM_DMB_WORD_OFFSET	1

#define ISM_DMB_BIT_OFFSET	(ISM_DMB_WORD_OFFSET * 32)

#define ISM_NR_DMBS		1920



#define ISM_REG_SBA	0x1

#define ISM_REG_IEQ	0x2

#define ISM_READ_GID	0x3

#define ISM_ADD_VLAN_ID	0x4

#define ISM_DEL_VLAN_ID	0x5

#define ISM_SET_VLAN	0x6

#define ISM_RESET_VLAN	0x7

#define ISM_QUERY_INFO	0x8

#define ISM_QUERY_RGID	0x9

#define ISM_REG_DMB	0xA

#define ISM_UNREG_DMB	0xB

#define ISM_SIGNAL_IEQ	0xE

#define ISM_UNREG_SBA	0x11

#define ISM_UNREG_IEQ	0x12



#define ISM_ERROR	0xFFFF



struct ism_req_hdr {

	u32 cmd;

	u16 : 16;

	u16 len;

};



struct ism_resp_hdr {

	u32 cmd;

	u16 ret;

	u16 len;

};



union ism_reg_sba {

	struct {

		struct ism_req_hdr hdr;

		u64 sba;

	} request;

	struct {

		struct ism_resp_hdr hdr;

	} response;

} __aligned(16);



union ism_reg_ieq {

	struct {

		struct ism_req_hdr hdr;

		u64 ieq;

		u64 len;

	} request;

	struct {

		struct ism_resp_hdr hdr;

	} response;

} __aligned(16);



union ism_read_gid {

	struct {

		struct ism_req_hdr hdr;

	} request;

	struct {

		struct ism_resp_hdr hdr;

		u64 gid;

	} response;

} __aligned(16);



union ism_qi {

	struct {

		struct ism_req_hdr hdr;

	} request;

	struct {

		struct ism_resp_hdr hdr;

		u32 version;

		u32 max_len;

		u64 ism_state;

		u64 my_gid;

		u64 sba;

		u64 ieq;

		u32 ieq_len;

		u32 : 32;

		u32 dmbs_owned;

		u32 dmbs_used;

		u32 vlan_required;

		u32 vlan_nr_ids;

		u16 vlan_id[64];

	} response;

} __aligned(64);



union ism_query_rgid {

	struct {

		struct ism_req_hdr hdr;

		u64 rgid;

		u32 vlan_valid;

		u32 vlan_id;

	} request;

	struct {

		struct ism_resp_hdr hdr;

	} response;

} __aligned(16);



union ism_reg_dmb {

	struct {

		struct ism_req_hdr hdr;

		u64 dmb;

		u32 dmb_len;

		u32 sba_idx;

		u32 vlan_valid;

		u32 vlan_id;

		u64 rgid;

	} request;

	struct {

		struct ism_resp_hdr hdr;

		u64 dmb_tok;

	} response;

} __aligned(32);



union ism_sig_ieq {

	struct {

		struct ism_req_hdr hdr;

		u64 rgid;

		u32 trigger_irq;

		u32 event_code;

		u64 info;

	} request;

	struct {

		struct ism_resp_hdr hdr;

	} response;

} __aligned(32);



union ism_unreg_dmb {

	struct {

		struct ism_req_hdr hdr;

		u64 dmb_tok;

	} request;

	struct {

		struct ism_resp_hdr hdr;

	} response;

} __aligned(16);



union ism_cmd_simple {

	struct {

		struct ism_req_hdr hdr;

	} request;

	struct {

		struct ism_resp_hdr hdr;

	} response;

} __aligned(8);



union ism_set_vlan_id {

	struct {

		struct ism_req_hdr hdr;

		u64 vlan_id;

	} request;

	struct {

		struct ism_resp_hdr hdr;

	} response;

} __aligned(16);



struct ism_eq_header {

	u64 idx;

	u64 ieq_len;

	u64 entry_len;

	u64 : 64;

};



struct ism_eq {

	struct ism_eq_header header;

	struct smcd_event entry[15];

};



struct ism_sba {

	u32 s : 1;	/* summary bit */

	u32 e : 1;	/* event bit */

	u32 : 30;

	u32 dmb_bits[ISM_NR_DMBS / 32];

	u32 reserved[3];

	u16 dmbe_mask[ISM_NR_DMBS];

};



struct ism_dev {

	spinlock_t lock;

	struct pci_dev *pdev;

	struct smcd_dev *smcd;



	void __iomem *ctl;



	struct ism_sba *sba;

	dma_addr_t sba_dma_addr;

	DECLARE_BITMAP(sba_bitmap, ISM_NR_DMBS);



	struct ism_eq *ieq;

	dma_addr_t ieq_dma_addr;



	int ieq_idx;

};



#define ISM_CREATE_REQ(dmb, idx, sf, offset)		\

	((dmb) | (idx) << 24 | (sf) << 23 | (offset))



static inline int __ism_move(struct ism_dev *ism, u64 dmb_req, void *data,

			     unsigned int size)

{

	struct zpci_dev *zdev = to_zpci(ism->pdev);

	u64 req = ZPCI_CREATE_REQ(zdev->fh, 0, size);



	return zpci_write_block(req, data, dmb_req);

}



#endif /* S390_ISM_H */

drivers/s390/net/ism_drv.c

0 → 100644
+623 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0

/*

 * ISM driver for s390.

 *

 * Copyright IBM Corp. 2018

 */

#define KMSG_COMPONENT "ism"

#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt



#include <linux/module.h>

#include <linux/types.h>

#include <linux/interrupt.h>

#include <linux/device.h>

#include <linux/pci.h>

#include <linux/err.h>

#include <net/smc.h>



#include <asm/debug.h>



#include "ism.h"



MODULE_DESCRIPTION("ISM driver for s390");

MODULE_LICENSE("GPL");



#define PCI_DEVICE_ID_IBM_ISM 0x04ED

#define DRV_NAME "ism"



static const struct pci_device_id ism_device_table[] = {

	{ PCI_VDEVICE(IBM, PCI_DEVICE_ID_IBM_ISM), 0 },

	{ 0, }

};

MODULE_DEVICE_TABLE(pci, ism_device_table);



static debug_info_t *ism_debug_info;



static int ism_cmd(struct ism_dev *ism, void *cmd)

{

	struct ism_req_hdr *req = cmd;

	struct ism_resp_hdr *resp = cmd;



	memcpy_toio(ism->ctl + sizeof(*req), req + 1, req->len - sizeof(*req));

	memcpy_toio(ism->ctl, req, sizeof(*req));



	WRITE_ONCE(resp->ret, ISM_ERROR);



	memcpy_fromio(resp, ism->ctl, sizeof(*resp));

	if (resp->ret) {

		debug_text_event(ism_debug_info, 0, "cmd failure");

		debug_event(ism_debug_info, 0, resp, sizeof(*resp));

		goto out;

	}

	memcpy_fromio(resp + 1, ism->ctl + sizeof(*resp),

		      resp->len - sizeof(*resp));

out:

	return resp->ret;

}



static int ism_cmd_simple(struct ism_dev *ism, u32 cmd_code)

{

	union ism_cmd_simple cmd;



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

	cmd.request.hdr.cmd = cmd_code;

	cmd.request.hdr.len = sizeof(cmd.request);



	return ism_cmd(ism, &cmd);

}



static int query_info(struct ism_dev *ism)

{

	union ism_qi cmd;



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

	cmd.request.hdr.cmd = ISM_QUERY_INFO;

	cmd.request.hdr.len = sizeof(cmd.request);



	if (ism_cmd(ism, &cmd))

		goto out;



	debug_text_event(ism_debug_info, 3, "query info");

	debug_event(ism_debug_info, 3, &cmd.response, sizeof(cmd.response));

out:

	return 0;

}



static int register_sba(struct ism_dev *ism)

{

	union ism_reg_sba cmd;

	dma_addr_t dma_handle;

	struct ism_sba *sba;



	sba = dma_zalloc_coherent(&ism->pdev->dev, PAGE_SIZE,

				  &dma_handle, GFP_KERNEL);

	if (!sba)

		return -ENOMEM;



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

	cmd.request.hdr.cmd = ISM_REG_SBA;

	cmd.request.hdr.len = sizeof(cmd.request);

	cmd.request.sba = dma_handle;



	if (ism_cmd(ism, &cmd)) {

		dma_free_coherent(&ism->pdev->dev, PAGE_SIZE, sba, dma_handle);

		return -EIO;

	}



	ism->sba = sba;

	ism->sba_dma_addr = dma_handle;



	return 0;

}



static int register_ieq(struct ism_dev *ism)

{

	union ism_reg_ieq cmd;

	dma_addr_t dma_handle;

	struct ism_eq *ieq;



	ieq = dma_zalloc_coherent(&ism->pdev->dev, PAGE_SIZE,

				  &dma_handle, GFP_KERNEL);

	if (!ieq)

		return -ENOMEM;



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

	cmd.request.hdr.cmd = ISM_REG_IEQ;

	cmd.request.hdr.len = sizeof(cmd.request);

	cmd.request.ieq = dma_handle;

	cmd.request.len = sizeof(*ieq);



	if (ism_cmd(ism, &cmd)) {

		dma_free_coherent(&ism->pdev->dev, PAGE_SIZE, ieq, dma_handle);

		return -EIO;

	}



	ism->ieq = ieq;

	ism->ieq_idx = -1;

	ism->ieq_dma_addr = dma_handle;



	return 0;

}



static int unregister_sba(struct ism_dev *ism)

{

	if (!ism->sba)

		return 0;



	if (ism_cmd_simple(ism, ISM_UNREG_SBA))

		return -EIO;



	dma_free_coherent(&ism->pdev->dev, PAGE_SIZE,

			  ism->sba, ism->sba_dma_addr);



	ism->sba = NULL;

	ism->sba_dma_addr = 0;



	return 0;

}



static int unregister_ieq(struct ism_dev *ism)

{

	if (!ism->ieq)

		return 0;



	if (ism_cmd_simple(ism, ISM_UNREG_IEQ))

		return -EIO;



	dma_free_coherent(&ism->pdev->dev, PAGE_SIZE,

			  ism->ieq, ism->ieq_dma_addr);



	ism->ieq = NULL;

	ism->ieq_dma_addr = 0;



	return 0;

}



static int ism_read_local_gid(struct ism_dev *ism)

{

	union ism_read_gid cmd;

	int ret;



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

	cmd.request.hdr.cmd = ISM_READ_GID;

	cmd.request.hdr.len = sizeof(cmd.request);



	ret = ism_cmd(ism, &cmd);

	if (ret)

		goto out;



	ism->smcd->local_gid = cmd.response.gid;

out:

	return ret;

}



static int ism_query_rgid(struct smcd_dev *smcd, u64 rgid, u32 vid_valid,

			  u32 vid)

{

	struct ism_dev *ism = smcd->priv;

	union ism_query_rgid cmd;



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

	cmd.request.hdr.cmd = ISM_QUERY_RGID;

	cmd.request.hdr.len = sizeof(cmd.request);



	cmd.request.rgid = rgid;

	cmd.request.vlan_valid = vid_valid;

	cmd.request.vlan_id = vid;



	return ism_cmd(ism, &cmd);

}



static void ism_free_dmb(struct ism_dev *ism, struct smcd_dmb *dmb)

{

	clear_bit(dmb->sba_idx, ism->sba_bitmap);

	dma_free_coherent(&ism->pdev->dev, dmb->dmb_len,

			  dmb->cpu_addr, dmb->dma_addr);

}



static int ism_alloc_dmb(struct ism_dev *ism, struct smcd_dmb *dmb)

{

	unsigned long bit;



	if (PAGE_ALIGN(dmb->dmb_len) > dma_get_max_seg_size(&ism->pdev->dev))

		return -EINVAL;



	if (!dmb->sba_idx) {

		bit = find_next_zero_bit(ism->sba_bitmap, ISM_NR_DMBS,

					 ISM_DMB_BIT_OFFSET);

		if (bit == ISM_NR_DMBS)

			return -ENOMEM;



		dmb->sba_idx = bit;

	}

	if (dmb->sba_idx < ISM_DMB_BIT_OFFSET ||

	    test_and_set_bit(dmb->sba_idx, ism->sba_bitmap))

		return -EINVAL;



	dmb->cpu_addr = dma_zalloc_coherent(&ism->pdev->dev, dmb->dmb_len,

					    &dmb->dma_addr, GFP_KERNEL |

					    __GFP_NOWARN | __GFP_NOMEMALLOC |

					    __GFP_COMP | __GFP_NORETRY);

	if (!dmb->cpu_addr)

		clear_bit(dmb->sba_idx, ism->sba_bitmap);



	return dmb->cpu_addr ? 0 : -ENOMEM;

}



static int ism_register_dmb(struct smcd_dev *smcd, struct smcd_dmb *dmb)

{

	struct ism_dev *ism = smcd->priv;

	union ism_reg_dmb cmd;

	int ret;



	ret = ism_alloc_dmb(ism, dmb);

	if (ret)

		goto out;



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

	cmd.request.hdr.cmd = ISM_REG_DMB;

	cmd.request.hdr.len = sizeof(cmd.request);



	cmd.request.dmb = dmb->dma_addr;

	cmd.request.dmb_len = dmb->dmb_len;

	cmd.request.sba_idx = dmb->sba_idx;

	cmd.request.vlan_valid = dmb->vlan_valid;

	cmd.request.vlan_id = dmb->vlan_id;

	cmd.request.rgid = dmb->rgid;



	ret = ism_cmd(ism, &cmd);

	if (ret) {

		ism_free_dmb(ism, dmb);

		goto out;

	}

	dmb->dmb_tok = cmd.response.dmb_tok;

out:

	return ret;

}



static int ism_unregister_dmb(struct smcd_dev *smcd, struct smcd_dmb *dmb)

{

	struct ism_dev *ism = smcd->priv;

	union ism_unreg_dmb cmd;

	int ret;



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

	cmd.request.hdr.cmd = ISM_UNREG_DMB;

	cmd.request.hdr.len = sizeof(cmd.request);



	cmd.request.dmb_tok = dmb->dmb_tok;



	ret = ism_cmd(ism, &cmd);

	if (ret)

		goto out;



	ism_free_dmb(ism, dmb);

out:

	return ret;

}



static int ism_add_vlan_id(struct smcd_dev *smcd, u64 vlan_id)

{

	struct ism_dev *ism = smcd->priv;

	union ism_set_vlan_id cmd;



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

	cmd.request.hdr.cmd = ISM_ADD_VLAN_ID;

	cmd.request.hdr.len = sizeof(cmd.request);



	cmd.request.vlan_id = vlan_id;



	return ism_cmd(ism, &cmd);

}



static int ism_del_vlan_id(struct smcd_dev *smcd, u64 vlan_id)

{

	struct ism_dev *ism = smcd->priv;

	union ism_set_vlan_id cmd;



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

	cmd.request.hdr.cmd = ISM_DEL_VLAN_ID;

	cmd.request.hdr.len = sizeof(cmd.request);



	cmd.request.vlan_id = vlan_id;



	return ism_cmd(ism, &cmd);

}



static int ism_set_vlan_required(struct smcd_dev *smcd)

{

	return ism_cmd_simple(smcd->priv, ISM_SET_VLAN);

}



static int ism_reset_vlan_required(struct smcd_dev *smcd)

{

	return ism_cmd_simple(smcd->priv, ISM_RESET_VLAN);

}



static int ism_signal_ieq(struct smcd_dev *smcd, u64 rgid, u32 trigger_irq,

			  u32 event_code, u64 info)

{

	struct ism_dev *ism = smcd->priv;

	union ism_sig_ieq cmd;



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

	cmd.request.hdr.cmd = ISM_SIGNAL_IEQ;

	cmd.request.hdr.len = sizeof(cmd.request);



	cmd.request.rgid = rgid;

	cmd.request.trigger_irq = trigger_irq;

	cmd.request.event_code = event_code;

	cmd.request.info = info;



	return ism_cmd(ism, &cmd);

}



static unsigned int max_bytes(unsigned int start, unsigned int len,

			      unsigned int boundary)

{

	return min(boundary - (start & (boundary - 1)), len);

}



static int ism_move(struct smcd_dev *smcd, u64 dmb_tok, unsigned int idx,

		    bool sf, unsigned int offset, void *data, unsigned int size)

{

	struct ism_dev *ism = smcd->priv;

	unsigned int bytes;

	u64 dmb_req;

	int ret;



	while (size) {

		bytes = max_bytes(offset, size, PAGE_SIZE);

		dmb_req = ISM_CREATE_REQ(dmb_tok, idx, size == bytes ? sf : 0,

					 offset);



		ret = __ism_move(ism, dmb_req, data, bytes);

		if (ret)

			return ret;



		size -= bytes;

		data += bytes;

		offset += bytes;

	}



	return 0;

}



static void ism_handle_event(struct ism_dev *ism)

{

	struct smcd_event *entry;



	while ((ism->ieq_idx + 1) != READ_ONCE(ism->ieq->header.idx)) {

		if (++(ism->ieq_idx) == ARRAY_SIZE(ism->ieq->entry))

			ism->ieq_idx = 0;



		entry = &ism->ieq->entry[ism->ieq_idx];

		debug_event(ism_debug_info, 2, entry, sizeof(*entry));

		smcd_handle_event(ism->smcd, entry);

	}

}



static irqreturn_t ism_handle_irq(int irq, void *data)

{

	struct ism_dev *ism = data;

	unsigned long bit, end;

	unsigned long *bv;



	bv = (void *) &ism->sba->dmb_bits[ISM_DMB_WORD_OFFSET];

	end = sizeof(ism->sba->dmb_bits) * BITS_PER_BYTE - ISM_DMB_BIT_OFFSET;



	spin_lock(&ism->lock);

	ism->sba->s = 0;

	barrier();

	for (bit = 0;;) {

		bit = find_next_bit_inv(bv, end, bit);

		if (bit >= end)

			break;



		clear_bit_inv(bit, bv);

		barrier();

		smcd_handle_irq(ism->smcd, bit + ISM_DMB_BIT_OFFSET);

		ism->sba->dmbe_mask[bit + ISM_DMB_BIT_OFFSET] = 0;

	}



	if (ism->sba->e) {

		ism->sba->e = 0;

		barrier();

		ism_handle_event(ism);

	}

	spin_unlock(&ism->lock);

	return IRQ_HANDLED;

}



static const struct smcd_ops ism_ops = {

	.query_remote_gid = ism_query_rgid,

	.register_dmb = ism_register_dmb,

	.unregister_dmb = ism_unregister_dmb,

	.add_vlan_id = ism_add_vlan_id,

	.del_vlan_id = ism_del_vlan_id,

	.set_vlan_required = ism_set_vlan_required,

	.reset_vlan_required = ism_reset_vlan_required,

	.signal_event = ism_signal_ieq,

	.move_data = ism_move,

};



static int ism_dev_init(struct ism_dev *ism)

{

	struct pci_dev *pdev = ism->pdev;

	int ret;



	ret = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_MSI);

	if (ret <= 0)

		goto out;



	ret = request_irq(pci_irq_vector(pdev, 0), ism_handle_irq, 0,

			  pci_name(pdev), ism);

	if (ret)

		goto free_vectors;



	ret = register_sba(ism);

	if (ret)

		goto free_irq;



	ret = register_ieq(ism);

	if (ret)

		goto unreg_sba;



	ret = ism_read_local_gid(ism);

	if (ret)

		goto unreg_ieq;



	ret = smcd_register_dev(ism->smcd);

	if (ret)

		goto unreg_ieq;



	query_info(ism);

	return 0;



unreg_ieq:

	unregister_ieq(ism);

unreg_sba:

	unregister_sba(ism);

free_irq:

	free_irq(pci_irq_vector(pdev, 0), ism);

free_vectors:

	pci_free_irq_vectors(pdev);

out:

	return ret;

}



static int ism_probe(struct pci_dev *pdev, const struct pci_device_id *id)

{

	struct ism_dev *ism;

	int ret;



	ism = kzalloc(sizeof(*ism), GFP_KERNEL);

	if (!ism)

		return -ENOMEM;



	spin_lock_init(&ism->lock);

	dev_set_drvdata(&pdev->dev, ism);

	ism->pdev = pdev;



	ret = pci_enable_device_mem(pdev);

	if (ret)

		goto err;



	ret = pci_request_mem_regions(pdev, DRV_NAME);

	if (ret)

		goto err_disable;



	ism->ctl = pci_iomap(pdev, 2, 0);

	if (!ism->ctl)

		goto err_resource;



	ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));

	if (ret)

		goto err_unmap;



	pci_set_dma_seg_boundary(pdev, SZ_1M - 1);

	pci_set_dma_max_seg_size(pdev, SZ_1M);

	pci_set_master(pdev);



	ism->smcd = smcd_alloc_dev(&pdev->dev, dev_name(&pdev->dev), &ism_ops,

				   ISM_NR_DMBS);

	if (!ism->smcd)

		goto err_unmap;



	ism->smcd->priv = ism;

	ret = ism_dev_init(ism);

	if (ret)

		goto err_free;



	return 0;



err_free:

	smcd_free_dev(ism->smcd);

err_unmap:

	pci_iounmap(pdev, ism->ctl);

err_resource:

	pci_release_mem_regions(pdev);

err_disable:

	pci_disable_device(pdev);

err:

	kfree(ism);

	dev_set_drvdata(&pdev->dev, NULL);

	return ret;

}



static void ism_dev_exit(struct ism_dev *ism)

{

	struct pci_dev *pdev = ism->pdev;



	smcd_unregister_dev(ism->smcd);

	unregister_ieq(ism);

	unregister_sba(ism);

	free_irq(pci_irq_vector(pdev, 0), ism);

	pci_free_irq_vectors(pdev);

}



static void ism_remove(struct pci_dev *pdev)

{

	struct ism_dev *ism = dev_get_drvdata(&pdev->dev);



	ism_dev_exit(ism);



	smcd_free_dev(ism->smcd);

	pci_iounmap(pdev, ism->ctl);

	pci_release_mem_regions(pdev);

	pci_disable_device(pdev);

	dev_set_drvdata(&pdev->dev, NULL);

	kfree(ism);

}



static int ism_suspend(struct device *dev)

{

	struct ism_dev *ism = dev_get_drvdata(dev);



	ism_dev_exit(ism);

	return 0;

}



static int ism_resume(struct device *dev)

{

	struct ism_dev *ism = dev_get_drvdata(dev);



	return ism_dev_init(ism);

}



static SIMPLE_DEV_PM_OPS(ism_pm_ops, ism_suspend, ism_resume);



static struct pci_driver ism_driver = {

	.name	  = DRV_NAME,

	.id_table = ism_device_table,

	.probe	  = ism_probe,

	.remove	  = ism_remove,

	.driver	  = {

		.pm = &ism_pm_ops,

	},

};



static int __init ism_init(void)

{

	int ret;



	ism_debug_info = debug_register("ism", 2, 1, 16);

	if (!ism_debug_info)

		return -ENODEV;



	debug_register_view(ism_debug_info, &debug_hex_ascii_view);

	ret = pci_register_driver(&ism_driver);

	if (ret)

		debug_unregister(ism_debug_info);



	return ret;

}



static void __exit ism_exit(void)

{

	pci_unregister_driver(&ism_driver);

	debug_unregister(ism_debug_info);

}



module_init(ism_init);

module_exit(ism_exit);

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