With this information, the number of available LUNs and capacity can be
can be calculated.
+
+HT_CXLFLASH_AFU_DEBUG
+---------------------
+ This ioctl is used to debug AFUs by supporting a command pass-through
+ interface. It is only valid when used with AFUs that support the AFU
+ debug capability.
+
+ With exception of buffer management, AFU debug commands are opaque to
+ cxlflash and treated as pass-through. For debug commands that do require
+ data transfer, the user supplies an adequately sized data buffer and must
+ specify the data transfer direction with respect to the host. There is a
+ maximum transfer size of 256K imposed. Note that partial read completions
+ are not supported - when errors are experienced with a host read data
+ transfer, the data buffer is not copied back to the user.
return afu_cap & cap;
}
+static inline bool afu_is_afu_debug(struct afu *afu)
+{
+ return afu_has_cap(afu, SISL_INTVER_CAP_AFU_DEBUG);
+}
+
static inline bool afu_is_lun_provision(struct afu *afu)
{
return afu_has_cap(afu, SISL_INTVER_CAP_LUN_PROVISION);
return rc;
}
+/**
+ * cxlflash_afu_debug() - host AFU debug handler
+ * @cfg: Internal structure associated with the host.
+ * @arg: Kernel copy of userspace ioctl data structure.
+ *
+ * For debug requests requiring a data buffer, always provide an aligned
+ * (cache line) buffer to the AFU to appease any alignment requirements.
+ *
+ * Return: 0 on success, -errno on failure
+ */
+static int cxlflash_afu_debug(struct cxlflash_cfg *cfg,
+ struct ht_cxlflash_afu_debug *afu_dbg)
+{
+ struct afu *afu = cfg->afu;
+ struct device *dev = &cfg->dev->dev;
+ struct sisl_ioarcb rcb;
+ struct sisl_ioasa asa;
+ char *buf = NULL;
+ char *kbuf = NULL;
+ void __user *ubuf = (__force void __user *)afu_dbg->data_ea;
+ u16 req_flags = SISL_REQ_FLAGS_AFU_CMD;
+ u32 ulen = afu_dbg->data_len;
+ bool is_write = afu_dbg->hdr.flags & HT_CXLFLASH_HOST_WRITE;
+ int rc = 0;
+
+ if (!afu_is_afu_debug(afu)) {
+ rc = -ENOTSUPP;
+ goto out;
+ }
+
+ if (ulen) {
+ req_flags |= SISL_REQ_FLAGS_SUP_UNDERRUN;
+
+ if (ulen > HT_CXLFLASH_AFU_DEBUG_MAX_DATA_LEN) {
+ rc = -EINVAL;
+ goto out;
+ }
+
+ if (unlikely(!access_ok(is_write ? VERIFY_READ : VERIFY_WRITE,
+ ubuf, ulen))) {
+ rc = -EFAULT;
+ goto out;
+ }
+
+ buf = kmalloc(ulen + cache_line_size() - 1, GFP_KERNEL);
+ if (unlikely(!buf)) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ kbuf = PTR_ALIGN(buf, cache_line_size());
+
+ if (is_write) {
+ req_flags |= SISL_REQ_FLAGS_HOST_WRITE;
+
+ rc = copy_from_user(kbuf, ubuf, ulen);
+ if (unlikely(rc))
+ goto out;
+ }
+ }
+
+ memset(&rcb, 0, sizeof(rcb));
+ memset(&asa, 0, sizeof(asa));
+
+ rcb.req_flags = req_flags;
+ rcb.msi = SISL_MSI_RRQ_UPDATED;
+ rcb.timeout = MC_AFU_DEBUG_TIMEOUT;
+ rcb.ioasa = &asa;
+
+ if (ulen) {
+ rcb.data_len = ulen;
+ rcb.data_ea = (uintptr_t)kbuf;
+ }
+
+ rcb.cdb[0] = SISL_AFU_CMD_DEBUG;
+ memcpy(&rcb.cdb[4], afu_dbg->afu_subcmd,
+ HT_CXLFLASH_AFU_DEBUG_SUBCMD_LEN);
+
+ rc = send_afu_cmd(afu, &rcb);
+ if (rc) {
+ dev_err(dev, "%s: send_afu_cmd failed rc=%d asc=%08x afux=%x\n",
+ __func__, rc, asa.ioasc, asa.afu_extra);
+ goto out;
+ }
+
+ if (ulen && !is_write)
+ rc = copy_to_user(ubuf, kbuf, ulen);
+out:
+ kfree(buf);
+ dev_dbg(dev, "%s: returning rc=%d\n", __func__, rc);
+ return rc;
+}
+
/**
* cxlflash_chr_ioctl() - character device IOCTL handler
* @file: File pointer for this device.
} ioctl_tbl[] = { /* NOTE: order matters here */
{ sizeof(struct ht_cxlflash_lun_provision),
(hioctl)cxlflash_lun_provision },
+ { sizeof(struct ht_cxlflash_afu_debug),
+ (hioctl)cxlflash_afu_debug },
};
/* Hold read semaphore so we can drain if needed */
switch (cmd) {
case HT_CXLFLASH_LUN_PROVISION:
+ case HT_CXLFLASH_AFU_DEBUG:
known_ioctl = true;
idx = _IOC_NR(HT_CXLFLASH_LUN_PROVISION) - _IOC_NR(cmd);
size = ioctl_tbl[idx].size;
/* AFU command timeout values */
#define MC_AFU_SYNC_TIMEOUT 5 /* 5 secs */
#define MC_LUN_PROV_TIMEOUT 5 /* 5 secs */
+#define MC_AFU_DEBUG_TIMEOUT 5 /* 5 secs */
/* AFU command room retry limit */
#define MC_ROOM_RETRY_CNT 10
u8 cdb[16]; /* must be in big endian */
#define SISL_AFU_CMD_SYNC 0xC0 /* AFU sync command */
#define SISL_AFU_CMD_LUN_PROVISION 0xD0 /* AFU LUN provision command */
+#define SISL_AFU_CMD_DEBUG 0xE0 /* AFU debug command */
#define SISL_AFU_LUN_PROVISION_CREATE 0x00 /* LUN provision create type */
#define SISL_AFU_LUN_PROVISION_DELETE 0x01 /* LUN provision delete type */
#define SISL_INTVER_CAP_RESERVED_CMD_MODE_A 0x200000000000ULL
#define SISL_INTVER_CAP_RESERVED_CMD_MODE_B 0x100000000000ULL
#define SISL_INTVER_CAP_LUN_PROVISION 0x080000000000ULL
+#define SISL_INTVER_CAP_AFU_DEBUG 0x040000000000ULL
};
#define CXLFLASH_NUM_FC_PORTS_PER_BANK 2 /* fixed # of ports per bank */
#include <linux/types.h>
+/*
+ * Structure and definitions for all CXL Flash ioctls
+ */
+#define CXLFLASH_WWID_LEN 16
+
/*
* Structure and flag definitions CXL Flash superpipe ioctls
*/
__u64 reserved[8]; /* Reserved for future use */
};
-#define DK_CXLFLASH_MANAGE_LUN_WWID_LEN 16
+#define DK_CXLFLASH_MANAGE_LUN_WWID_LEN CXLFLASH_WWID_LEN
#define DK_CXLFLASH_MANAGE_LUN_ENABLE_SUPERPIPE 0x8000000000000000ULL
#define DK_CXLFLASH_MANAGE_LUN_DISABLE_SUPERPIPE 0x4000000000000000ULL
#define DK_CXLFLASH_MANAGE_LUN_ALL_PORTS_ACCESSIBLE 0x2000000000000000ULL
__u64 return_flags; /* Returned flags */
};
+/*
+ * Input flag definitions available to all host ioctls
+ *
+ * These are grown from the bottom-up with the intention that ioctl-specific
+ * input flag definitions would grow from the top-down, allowing the two sets
+ * to co-exist. While not required/enforced at this time, this provides future
+ * flexibility.
+ */
+#define HT_CXLFLASH_HOST_READ 0x0000000000000000ULL
+#define HT_CXLFLASH_HOST_WRITE 0x0000000000000001ULL
+
#define HT_CXLFLASH_LUN_PROVISION_SUBCMD_CREATE_LUN 0x0001
#define HT_CXLFLASH_LUN_PROVISION_SUBCMD_DELETE_LUN 0x0002
#define HT_CXLFLASH_LUN_PROVISION_SUBCMD_QUERY_PORT 0x0003
-#define HT_CXLFLASH_LUN_PROVISION_WWID_LEN 16
struct ht_cxlflash_lun_provision {
struct ht_cxlflash_hdr hdr; /* Common fields */
__u16 reserved16[3]; /* Reserved for future use */
__u64 size; /* Size of LUN (4K blocks) */
__u64 lun_id; /* SCSI LUN ID */
- __u8 wwid[HT_CXLFLASH_LUN_PROVISION_WWID_LEN]; /* Page83 WWID, NAA-6 */
+ __u8 wwid[CXLFLASH_WWID_LEN];/* Page83 WWID, NAA-6 */
__u64 max_num_luns; /* Maximum number of LUNs provisioned */
__u64 cur_num_luns; /* Current number of LUNs provisioned */
__u64 max_cap_port; /* Total capacity for port (4K blocks) */
__u64 reserved[8]; /* Reserved for future use */
};
+#define HT_CXLFLASH_AFU_DEBUG_MAX_DATA_LEN 262144 /* 256K */
+#define HT_CXLFLASH_AFU_DEBUG_SUBCMD_LEN 12
+struct ht_cxlflash_afu_debug {
+ struct ht_cxlflash_hdr hdr; /* Common fields */
+ __u8 reserved8[4]; /* Reserved for future use */
+ __u8 afu_subcmd[HT_CXLFLASH_AFU_DEBUG_SUBCMD_LEN]; /* AFU subcommand,
+ * (pass through)
+ */
+ __u64 data_ea; /* Data buffer effective address */
+ __u32 data_len; /* Data buffer length */
+ __u32 reserved32; /* Reserved for future use */
+ __u64 reserved[8]; /* Reserved for future use */
+};
+
union cxlflash_ht_ioctls {
struct ht_cxlflash_lun_provision lun_provision;
+ struct ht_cxlflash_afu_debug afu_debug;
};
#define MAX_HT_CXLFLASH_IOCTL_SZ (sizeof(union cxlflash_ht_ioctls))
* region (0xBF) and grow downwards.
*/
#define HT_CXLFLASH_LUN_PROVISION CXL_IOWR(0xBF, ht_cxlflash_lun_provision)
+#define HT_CXLFLASH_AFU_DEBUG CXL_IOWR(0xBE, ht_cxlflash_afu_debug)
#endif /* ifndef _CXLFLASH_IOCTL_H */
projects / users / willy / pagecache.git / commitdiff