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>
This commit is contained in:
Sebastian Ott
David S. Miller
parent
4b1b7d3b30
commit
684b89bc39
|
|
@ -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
|
||||
|
|
|
|||
|
|
@ -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
|
||||
|
|
|
|||
|
|
@ -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 */
|
||||
|
|
@ -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);
|
||||
Loading…
Reference in New Issue