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: Sebastian Ott <sebott@linux.ibm.com>
Signed-off-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/s390/net/Kconfig b/drivers/s390/net/Kconfig
index c7e484f..7c5a25d 100644 (file)
--- a/drivers/s390/net/Kconfig
+++ b/drivers/s390/net/Kconfig
@@ -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

diff --git a/drivers/s390/net/Makefile b/drivers/s390/net/Makefile
index 513b7ae..f2d6bbe 100644 (file)
--- a/drivers/s390/net/Makefile
+++ b/drivers/s390/net/Makefile
@@ -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

diff --git a/drivers/s390/net/ism.h b/drivers/s390/net/ism.h
new file mode 100644 (file)
index 0000000..0aab908
--- /dev/null
+++ b/drivers/s390/net/ism.h
@@ -0,0 +1,221 @@
+/* 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 */

diff --git a/drivers/s390/net/ism_drv.c b/drivers/s390/net/ism_drv.c
new file mode 100644 (file)
index 0000000..c063189
--- /dev/null
+++ b/drivers/s390/net/ism_drv.c
@@ -0,0 +1,623 @@
+// 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);