Merge tag 'trace-printf-v6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/trace...

[drm/drm-misc.git] / drivers / s390 / net / ism_drv.c

// 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/err.h>
#include <linux/ctype.h>
#include <linux/processor.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;

#define NO_CLIENT               0xff            /* must be >= MAX_CLIENTS */
static struct ism_client *clients[MAX_CLIENTS]; /* use an array rather than */
                                                /* a list for fast mapping  */
static u8 max_client;
static DEFINE_MUTEX(clients_lock);
static bool ism_v2_capable;
struct ism_dev_list {
        struct list_head list;
        struct mutex mutex; /* protects ism device list */
};

static struct ism_dev_list ism_dev_list = {
        .list = LIST_HEAD_INIT(ism_dev_list.list),
        .mutex = __MUTEX_INITIALIZER(ism_dev_list.mutex),
};

static void ism_setup_forwarding(struct ism_client *client, struct ism_dev *ism)
{
        unsigned long flags;

        spin_lock_irqsave(&ism->lock, flags);
        ism->subs[client->id] = client;
        spin_unlock_irqrestore(&ism->lock, flags);
}

int ism_register_client(struct ism_client *client)
{
        struct ism_dev *ism;
        int i, rc = -ENOSPC;

        mutex_lock(&ism_dev_list.mutex);
        mutex_lock(&clients_lock);
        for (i = 0; i < MAX_CLIENTS; ++i) {
                if (!clients[i]) {
                        clients[i] = client;
                        client->id = i;
                        if (i == max_client)
                                max_client++;
                        rc = 0;
                        break;
                }
        }
        mutex_unlock(&clients_lock);

        if (i < MAX_CLIENTS) {
                /* initialize with all devices that we got so far */
                list_for_each_entry(ism, &ism_dev_list.list, list) {
                        ism->priv[i] = NULL;
                        client->add(ism);
                        ism_setup_forwarding(client, ism);
                }
        }
        mutex_unlock(&ism_dev_list.mutex);

        return rc;
}
EXPORT_SYMBOL_GPL(ism_register_client);

int ism_unregister_client(struct ism_client *client)
{
        struct ism_dev *ism;
        unsigned long flags;
        int rc = 0;

        mutex_lock(&ism_dev_list.mutex);
        list_for_each_entry(ism, &ism_dev_list.list, list) {
                spin_lock_irqsave(&ism->lock, flags);
                /* Stop forwarding IRQs and events */
                ism->subs[client->id] = NULL;
                for (int i = 0; i < ISM_NR_DMBS; ++i) {
                        if (ism->sba_client_arr[i] == client->id) {
                                WARN(1, "%s: attempt to unregister '%s' with registered dmb(s)\n",
                                     __func__, client->name);
                                rc = -EBUSY;
                                goto err_reg_dmb;
                        }
                }
                spin_unlock_irqrestore(&ism->lock, flags);
        }
        mutex_unlock(&ism_dev_list.mutex);

        mutex_lock(&clients_lock);
        clients[client->id] = NULL;
        if (client->id + 1 == max_client)
                max_client--;
        mutex_unlock(&clients_lock);
        return rc;

err_reg_dmb:
        spin_unlock_irqrestore(&ism->lock, flags);
        mutex_unlock(&ism_dev_list.mutex);
        return rc;
}
EXPORT_SYMBOL_GPL(ism_unregister_client);

static int ism_cmd(struct ism_dev *ism, void *cmd)
{
        struct ism_req_hdr *req = cmd;
        struct ism_resp_hdr *resp = cmd;

        __ism_write_cmd(ism, req + 1, sizeof(*req), req->len - sizeof(*req));
        __ism_write_cmd(ism, req, 0, sizeof(*req));

        WRITE_ONCE(resp->ret, ISM_ERROR);

        __ism_read_cmd(ism, resp, 0, 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;
        }
        __ism_read_cmd(ism, resp + 1, 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_alloc_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_alloc_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)
{
        int ret;

        if (!ism->sba)
                return 0;

        ret = ism_cmd_simple(ism, ISM_UNREG_SBA);
        if (ret && ret != ISM_ERROR)
                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)
{
        int ret;

        if (!ism->ieq)
                return 0;

        ret = ism_cmd_simple(ism, ISM_UNREG_IEQ);
        if (ret && ret != ISM_ERROR)
                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->local_gid = cmd.response.gid;
out:
        return ret;
}

static void ism_free_dmb(struct ism_dev *ism, struct ism_dmb *dmb)
{
        clear_bit(dmb->sba_idx, ism->sba_bitmap);
        dma_unmap_page(&ism->pdev->dev, dmb->dma_addr, dmb->dmb_len,
                       DMA_FROM_DEVICE);
        folio_put(virt_to_folio(dmb->cpu_addr));
}

static int ism_alloc_dmb(struct ism_dev *ism, struct ism_dmb *dmb)
{
        struct folio *folio;
        unsigned long bit;
        int rc;

        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 -ENOSPC;

                dmb->sba_idx = bit;
        }
        if (dmb->sba_idx < ISM_DMB_BIT_OFFSET ||
            test_and_set_bit(dmb->sba_idx, ism->sba_bitmap))
                return -EINVAL;

        folio = folio_alloc(GFP_KERNEL | __GFP_NOWARN | __GFP_NOMEMALLOC |
                            __GFP_NORETRY, get_order(dmb->dmb_len));

        if (!folio) {
                rc = -ENOMEM;
                goto out_bit;
        }

        dmb->cpu_addr = folio_address(folio);
        dmb->dma_addr = dma_map_page(&ism->pdev->dev,
                                     virt_to_page(dmb->cpu_addr), 0,
                                     dmb->dmb_len, DMA_FROM_DEVICE);
        if (dma_mapping_error(&ism->pdev->dev, dmb->dma_addr)) {
                rc = -ENOMEM;
                goto out_free;
        }

        return 0;

out_free:
        kfree(dmb->cpu_addr);
out_bit:
        clear_bit(dmb->sba_idx, ism->sba_bitmap);
        return rc;
}

int ism_register_dmb(struct ism_dev *ism, struct ism_dmb *dmb,
                     struct ism_client *client)
{
        union ism_reg_dmb cmd;
        unsigned long flags;
        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;
        spin_lock_irqsave(&ism->lock, flags);
        ism->sba_client_arr[dmb->sba_idx - ISM_DMB_BIT_OFFSET] = client->id;
        spin_unlock_irqrestore(&ism->lock, flags);
out:
        return ret;
}
EXPORT_SYMBOL_GPL(ism_register_dmb);

int ism_unregister_dmb(struct ism_dev *ism, struct ism_dmb *dmb)
{
        union ism_unreg_dmb cmd;
        unsigned long flags;
        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;

        spin_lock_irqsave(&ism->lock, flags);
        ism->sba_client_arr[dmb->sba_idx - ISM_DMB_BIT_OFFSET] = NO_CLIENT;
        spin_unlock_irqrestore(&ism->lock, flags);

        ret = ism_cmd(ism, &cmd);
        if (ret && ret != ISM_ERROR)
                goto out;

        ism_free_dmb(ism, dmb);
out:
        return ret;
}
EXPORT_SYMBOL_GPL(ism_unregister_dmb);

static int ism_add_vlan_id(struct ism_dev *ism, u64 vlan_id)
{
        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 ism_dev *ism, u64 vlan_id)
{
        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 unsigned int max_bytes(unsigned int start, unsigned int len,
                              unsigned int boundary)
{
        return min(boundary - (start & (boundary - 1)), len);
}

int ism_move(struct ism_dev *ism, u64 dmb_tok, unsigned int idx, bool sf,
             unsigned int offset, void *data, unsigned int size)
{
        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;
}
EXPORT_SYMBOL_GPL(ism_move);

static void ism_handle_event(struct ism_dev *ism)
{
        struct ism_event *entry;
        struct ism_client *clt;
        int i;

        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));
                for (i = 0; i < max_client; ++i) {
                        clt = ism->subs[i];
                        if (clt)
                                clt->handle_event(ism, entry);
                }
        }
}

static irqreturn_t ism_handle_irq(int irq, void *data)
{
        struct ism_dev *ism = data;
        unsigned long bit, end;
        unsigned long *bv;
        u16 dmbemask;
        u8 client_id;

        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);
                dmbemask = ism->sba->dmbe_mask[bit + ISM_DMB_BIT_OFFSET];
                ism->sba->dmbe_mask[bit + ISM_DMB_BIT_OFFSET] = 0;
                barrier();
                client_id = ism->sba_client_arr[bit];
                if (unlikely(client_id == NO_CLIENT || !ism->subs[client_id]))
                        continue;
                ism->subs[client_id]->handle_irq(ism, bit + ISM_DMB_BIT_OFFSET, dmbemask);
        }

        if (ism->sba->e) {
                ism->sba->e = 0;
                barrier();
                ism_handle_event(ism);
        }
        spin_unlock(&ism->lock);
        return IRQ_HANDLED;
}

static int ism_dev_init(struct ism_dev *ism)
{
        struct pci_dev *pdev = ism->pdev;
        int i, ret;

        ret = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_MSI);
        if (ret <= 0)
                goto out;

        ism->sba_client_arr = kzalloc(ISM_NR_DMBS, GFP_KERNEL);
        if (!ism->sba_client_arr)
                goto free_vectors;
        memset(ism->sba_client_arr, NO_CLIENT, ISM_NR_DMBS);

        ret = request_irq(pci_irq_vector(pdev, 0), ism_handle_irq, 0,
                          pci_name(pdev), ism);
        if (ret)
                goto free_client_arr;

        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;

        if (!ism_add_vlan_id(ism, ISM_RESERVED_VLANID))
                /* hardware is V2 capable */
                ism_v2_capable = true;
        else
                ism_v2_capable = false;

        mutex_lock(&ism_dev_list.mutex);
        mutex_lock(&clients_lock);
        for (i = 0; i < max_client; ++i) {
                if (clients[i]) {
                        clients[i]->add(ism);
                        ism_setup_forwarding(clients[i], ism);
                }
        }
        mutex_unlock(&clients_lock);

        list_add(&ism->list, &ism_dev_list.list);
        mutex_unlock(&ism_dev_list.mutex);

        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_client_arr:
        kfree(ism->sba_client_arr);
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;
        ism->dev.parent = &pdev->dev;
        device_initialize(&ism->dev);
        dev_set_name(&ism->dev, dev_name(&pdev->dev));
        ret = device_add(&ism->dev);
        if (ret)
                goto err_dev;

        ret = pci_enable_device_mem(pdev);
        if (ret)
                goto err;

        ret = pci_request_mem_regions(pdev, DRV_NAME);
        if (ret)
                goto err_disable;

        ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
        if (ret)
                goto err_resource;

        dma_set_seg_boundary(&pdev->dev, SZ_1M - 1);
        dma_set_max_seg_size(&pdev->dev, SZ_1M);
        pci_set_master(pdev);

        ret = ism_dev_init(ism);
        if (ret)
                goto err_resource;

        return 0;

err_resource:
        pci_release_mem_regions(pdev);
err_disable:
        pci_disable_device(pdev);
err:
        device_del(&ism->dev);
err_dev:
        dev_set_drvdata(&pdev->dev, NULL);
        kfree(ism);

        return ret;
}

static void ism_dev_exit(struct ism_dev *ism)
{
        struct pci_dev *pdev = ism->pdev;
        unsigned long flags;
        int i;

        spin_lock_irqsave(&ism->lock, flags);
        for (i = 0; i < max_client; ++i)
                ism->subs[i] = NULL;
        spin_unlock_irqrestore(&ism->lock, flags);

        mutex_lock(&ism_dev_list.mutex);
        mutex_lock(&clients_lock);
        for (i = 0; i < max_client; ++i) {
                if (clients[i])
                        clients[i]->remove(ism);
        }
        mutex_unlock(&clients_lock);

        if (ism_v2_capable)
                ism_del_vlan_id(ism, ISM_RESERVED_VLANID);
        unregister_ieq(ism);
        unregister_sba(ism);
        free_irq(pci_irq_vector(pdev, 0), ism);
        kfree(ism->sba_client_arr);
        pci_free_irq_vectors(pdev);
        list_del_init(&ism->list);
        mutex_unlock(&ism_dev_list.mutex);
}

static void ism_remove(struct pci_dev *pdev)
{
        struct ism_dev *ism = dev_get_drvdata(&pdev->dev);

        ism_dev_exit(ism);

        pci_release_mem_regions(pdev);
        pci_disable_device(pdev);
        device_del(&ism->dev);
        dev_set_drvdata(&pdev->dev, NULL);
        kfree(ism);
}

static struct pci_driver ism_driver = {
        .name     = DRV_NAME,
        .id_table = ism_device_table,
        .probe    = ism_probe,
        .remove   = ism_remove,
};

static int __init ism_init(void)
{
        int ret;

        ism_debug_info = debug_register("ism", 2, 1, 16);
        if (!ism_debug_info)
                return -ENODEV;

        memset(clients, 0, sizeof(clients));
        max_client = 0;
        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);

/*************************** SMC-D Implementation *****************************/

#if IS_ENABLED(CONFIG_SMC)
static int ism_query_rgid(struct ism_dev *ism, u64 rgid, u32 vid_valid,
                          u32 vid)
{
        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 int smcd_query_rgid(struct smcd_dev *smcd, struct smcd_gid *rgid,
                           u32 vid_valid, u32 vid)
{
        return ism_query_rgid(smcd->priv, rgid->gid, vid_valid, vid);
}

static int smcd_register_dmb(struct smcd_dev *smcd, struct smcd_dmb *dmb,
                             void *client)
{
        return ism_register_dmb(smcd->priv, (struct ism_dmb *)dmb, client);
}

static int smcd_unregister_dmb(struct smcd_dev *smcd, struct smcd_dmb *dmb)
{
        return ism_unregister_dmb(smcd->priv, (struct ism_dmb *)dmb);
}

static int smcd_add_vlan_id(struct smcd_dev *smcd, u64 vlan_id)
{
        return ism_add_vlan_id(smcd->priv, vlan_id);
}

static int smcd_del_vlan_id(struct smcd_dev *smcd, u64 vlan_id)
{
        return ism_del_vlan_id(smcd->priv, vlan_id);
}

static int smcd_set_vlan_required(struct smcd_dev *smcd)
{
        return ism_cmd_simple(smcd->priv, ISM_SET_VLAN);
}

static int smcd_reset_vlan_required(struct smcd_dev *smcd)
{
        return ism_cmd_simple(smcd->priv, ISM_RESET_VLAN);
}

static int ism_signal_ieq(struct ism_dev *ism, u64 rgid, u32 trigger_irq,
                          u32 event_code, u64 info)
{
        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 int smcd_signal_ieq(struct smcd_dev *smcd, struct smcd_gid *rgid,
                           u32 trigger_irq, u32 event_code, u64 info)
{
        return ism_signal_ieq(smcd->priv, rgid->gid,
                              trigger_irq, event_code, info);
}

static int smcd_move(struct smcd_dev *smcd, u64 dmb_tok, unsigned int idx,
                     bool sf, unsigned int offset, void *data,
                     unsigned int size)
{
        return ism_move(smcd->priv, dmb_tok, idx, sf, offset, data, size);
}

static int smcd_supports_v2(void)
{
        return ism_v2_capable;
}

static u64 ism_get_local_gid(struct ism_dev *ism)
{
        return ism->local_gid;
}

static void smcd_get_local_gid(struct smcd_dev *smcd,
                               struct smcd_gid *smcd_gid)
{
        smcd_gid->gid = ism_get_local_gid(smcd->priv);
        smcd_gid->gid_ext = 0;
}

static u16 ism_get_chid(struct ism_dev *ism)
{
        if (!ism || !ism->pdev)
                return 0;

        return to_zpci(ism->pdev)->pchid;
}

static u16 smcd_get_chid(struct smcd_dev *smcd)
{
        return ism_get_chid(smcd->priv);
}

static inline struct device *smcd_get_dev(struct smcd_dev *dev)
{
        struct ism_dev *ism = dev->priv;

        return &ism->dev;
}

static const struct smcd_ops ism_ops = {
        .query_remote_gid = smcd_query_rgid,
        .register_dmb = smcd_register_dmb,
        .unregister_dmb = smcd_unregister_dmb,
        .add_vlan_id = smcd_add_vlan_id,
        .del_vlan_id = smcd_del_vlan_id,
        .set_vlan_required = smcd_set_vlan_required,
        .reset_vlan_required = smcd_reset_vlan_required,
        .signal_event = smcd_signal_ieq,
        .move_data = smcd_move,
        .supports_v2 = smcd_supports_v2,
        .get_local_gid = smcd_get_local_gid,
        .get_chid = smcd_get_chid,
        .get_dev = smcd_get_dev,
};

const struct smcd_ops *ism_get_smcd_ops(void)
{
        return &ism_ops;
}
EXPORT_SYMBOL_GPL(ism_get_smcd_ops);
#endif