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scsi: lpfc: Create a sysfs entry called lpfc_xcvr_data for transceive…
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…r info

The DUMP_MEMORY mailbox command is implemented for page A0 and A2 to
retrieve transceiver information from firmware.

The mailbox command output is then formatted to print raw data values for
userspace to parse via sysfs.

Signed-off-by: Justin Tee <justin.tee@broadcom.com>
Link: https://lore.kernel.org/r/20221017164323.14536-4-justintee8345@gmail.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Justin Tee authored and Martin K. Petersen committed Oct 22, 2022
1 parent eaf660e commit 479b091
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Showing 4 changed files with 252 additions and 2 deletions.
118 changes: 118 additions & 0 deletions drivers/scsi/lpfc/lpfc_attr.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -1877,6 +1877,122 @@ lpfc_set_trunking(struct lpfc_hba *phba, char *buff_out)
return 0;
}

static ssize_t
lpfc_xcvr_data_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct Scsi_Host *shost = class_to_shost(dev);
struct lpfc_vport *vport = (struct lpfc_vport *)shost->hostdata;
struct lpfc_hba *phba = vport->phba;
int rc;
int len = 0;
struct lpfc_rdp_context *rdp_context;
u16 temperature;
u16 rx_power;
u16 tx_bias;
u16 tx_power;
u16 vcc;
char chbuf[128];
u16 wavelength = 0;
struct sff_trasnceiver_codes_byte7 *trasn_code_byte7;

/* Get transceiver information */
rdp_context = kmalloc(sizeof(*rdp_context), GFP_KERNEL);

rc = lpfc_get_sfp_info_wait(phba, rdp_context);
if (rc) {
len = scnprintf(buf, PAGE_SIZE - len, "SFP info NA:\n");
goto out_free_rdp;
}

strncpy(chbuf, &rdp_context->page_a0[SSF_VENDOR_NAME], 16);
chbuf[16] = 0;

len = scnprintf(buf, PAGE_SIZE - len, "VendorName:\t%s\n", chbuf);
len += scnprintf(buf + len, PAGE_SIZE - len,
"VendorOUI:\t%02x-%02x-%02x\n",
(uint8_t)rdp_context->page_a0[SSF_VENDOR_OUI],
(uint8_t)rdp_context->page_a0[SSF_VENDOR_OUI + 1],
(uint8_t)rdp_context->page_a0[SSF_VENDOR_OUI + 2]);
strncpy(chbuf, &rdp_context->page_a0[SSF_VENDOR_PN], 16);
chbuf[16] = 0;
len += scnprintf(buf + len, PAGE_SIZE - len, "VendorPN:\t%s\n", chbuf);
strncpy(chbuf, &rdp_context->page_a0[SSF_VENDOR_SN], 16);
chbuf[16] = 0;
len += scnprintf(buf + len, PAGE_SIZE - len, "VendorSN:\t%s\n", chbuf);
strncpy(chbuf, &rdp_context->page_a0[SSF_VENDOR_REV], 4);
chbuf[4] = 0;
len += scnprintf(buf + len, PAGE_SIZE - len, "VendorRev:\t%s\n", chbuf);
strncpy(chbuf, &rdp_context->page_a0[SSF_DATE_CODE], 8);
chbuf[8] = 0;
len += scnprintf(buf + len, PAGE_SIZE - len, "DateCode:\t%s\n", chbuf);
len += scnprintf(buf + len, PAGE_SIZE - len, "Identifier:\t%xh\n",
(uint8_t)rdp_context->page_a0[SSF_IDENTIFIER]);
len += scnprintf(buf + len, PAGE_SIZE - len, "ExtIdentifier:\t%xh\n",
(uint8_t)rdp_context->page_a0[SSF_EXT_IDENTIFIER]);
len += scnprintf(buf + len, PAGE_SIZE - len, "Connector:\t%xh\n",
(uint8_t)rdp_context->page_a0[SSF_CONNECTOR]);
wavelength = (rdp_context->page_a0[SSF_WAVELENGTH_B1] << 8) |
rdp_context->page_a0[SSF_WAVELENGTH_B0];

len += scnprintf(buf + len, PAGE_SIZE - len, "Wavelength:\t%d nm\n",
wavelength);
trasn_code_byte7 = (struct sff_trasnceiver_codes_byte7 *)
&rdp_context->page_a0[SSF_TRANSCEIVER_CODE_B7];

len += scnprintf(buf + len, PAGE_SIZE - len, "Speeds: \t");
if (*(uint8_t *)trasn_code_byte7 == 0) {
len += scnprintf(buf + len, PAGE_SIZE - len,
"Unknown\n");
} else {
if (trasn_code_byte7->fc_sp_100MB)
len += scnprintf(buf + len, PAGE_SIZE - len,
"1 ");
if (trasn_code_byte7->fc_sp_200mb)
len += scnprintf(buf + len, PAGE_SIZE - len,
"2 ");
if (trasn_code_byte7->fc_sp_400MB)
len += scnprintf(buf + len, PAGE_SIZE - len,
"4 ");
if (trasn_code_byte7->fc_sp_800MB)
len += scnprintf(buf + len, PAGE_SIZE - len,
"8 ");
if (trasn_code_byte7->fc_sp_1600MB)
len += scnprintf(buf + len, PAGE_SIZE - len,
"16 ");
if (trasn_code_byte7->fc_sp_3200MB)
len += scnprintf(buf + len, PAGE_SIZE - len,
"32 ");
if (trasn_code_byte7->speed_chk_ecc)
len += scnprintf(buf + len, PAGE_SIZE - len,
"64 ");
len += scnprintf(buf + len, PAGE_SIZE - len, "GB\n");
}
temperature = (rdp_context->page_a2[SFF_TEMPERATURE_B1] << 8 |
rdp_context->page_a2[SFF_TEMPERATURE_B0]);
vcc = (rdp_context->page_a2[SFF_VCC_B1] << 8 |
rdp_context->page_a2[SFF_VCC_B0]);
tx_power = (rdp_context->page_a2[SFF_TXPOWER_B1] << 8 |
rdp_context->page_a2[SFF_TXPOWER_B0]);
tx_bias = (rdp_context->page_a2[SFF_TX_BIAS_CURRENT_B1] << 8 |
rdp_context->page_a2[SFF_TX_BIAS_CURRENT_B0]);
rx_power = (rdp_context->page_a2[SFF_RXPOWER_B1] << 8 |
rdp_context->page_a2[SFF_RXPOWER_B0]);

len += scnprintf(buf + len, PAGE_SIZE - len,
"Temperature:\tx%04x C\n", temperature);
len += scnprintf(buf + len, PAGE_SIZE - len, "Vcc:\t\tx%04x V\n", vcc);
len += scnprintf(buf + len, PAGE_SIZE - len,
"TxBiasCurrent:\tx%04x mA\n", tx_bias);
len += scnprintf(buf + len, PAGE_SIZE - len, "TxPower:\tx%04x mW\n",
tx_power);
len += scnprintf(buf + len, PAGE_SIZE - len, "RxPower:\tx%04x mW\n",
rx_power);
out_free_rdp:
kfree(rdp_context);
return len;
}

/**
* lpfc_board_mode_show - Return the state of the board
* @dev: class device that is converted into a Scsi_host.
Expand Down Expand Up @@ -2810,6 +2926,7 @@ static DEVICE_ATTR_RO(lpfc_drvr_version);
static DEVICE_ATTR_RO(lpfc_enable_fip);
static DEVICE_ATTR(board_mode, S_IRUGO | S_IWUSR,
lpfc_board_mode_show, lpfc_board_mode_store);
static DEVICE_ATTR_RO(lpfc_xcvr_data);
static DEVICE_ATTR(issue_reset, S_IWUSR, NULL, lpfc_issue_reset);
static DEVICE_ATTR(max_vpi, S_IRUGO, lpfc_max_vpi_show, NULL);
static DEVICE_ATTR(used_vpi, S_IRUGO, lpfc_used_vpi_show, NULL);
Expand Down Expand Up @@ -5906,6 +6023,7 @@ static struct attribute *lpfc_hba_attrs[] = {
&dev_attr_lpfc_fcp_wait_abts_rsp.attr,
&dev_attr_nport_evt_cnt.attr,
&dev_attr_board_mode.attr,
&dev_attr_lpfc_xcvr_data.attr,
&dev_attr_max_vpi.attr,
&dev_attr_used_vpi.attr,
&dev_attr_max_rpi.attr,
Expand Down
3 changes: 3 additions & 0 deletions drivers/scsi/lpfc/lpfc_crtn.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -687,3 +687,6 @@ int lpfc_issue_els_qfpa(struct lpfc_vport *vport);

void lpfc_sli_rpi_release(struct lpfc_vport *vport,
struct lpfc_nodelist *ndlp);

int lpfc_get_sfp_info_wait(struct lpfc_hba *phba,
struct lpfc_rdp_context *rdp_context);
128 changes: 128 additions & 0 deletions drivers/scsi/lpfc/lpfc_els.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -7190,6 +7190,134 @@ lpfc_get_rdp_info(struct lpfc_hba *phba, struct lpfc_rdp_context *rdp_context)
return 1;
}

int lpfc_get_sfp_info_wait(struct lpfc_hba *phba,
struct lpfc_rdp_context *rdp_context)
{
LPFC_MBOXQ_t *mbox = NULL;
int rc;
struct lpfc_dmabuf *mp;
struct lpfc_dmabuf *mpsave;
void *virt;
MAILBOX_t *mb;

mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
if (!mbox) {
lpfc_printf_log(phba, KERN_WARNING, LOG_MBOX | LOG_ELS,
"7205 failed to allocate mailbox memory");
return 1;
}

if (lpfc_sli4_dump_page_a0(phba, mbox))
goto sfp_fail;
mp = mbox->ctx_buf;
mpsave = mp;
virt = mp->virt;
if (phba->sli_rev < LPFC_SLI_REV4) {
mb = &mbox->u.mb;
mb->un.varDmp.cv = 1;
mb->un.varDmp.co = 1;
mb->un.varWords[2] = 0;
mb->un.varWords[3] = DMP_SFF_PAGE_A0_SIZE / 4;
mb->un.varWords[4] = 0;
mb->un.varWords[5] = 0;
mb->un.varWords[6] = 0;
mb->un.varWords[7] = 0;
mb->un.varWords[8] = 0;
mb->un.varWords[9] = 0;
mb->un.varWords[10] = 0;
mbox->in_ext_byte_len = DMP_SFF_PAGE_A0_SIZE;
mbox->out_ext_byte_len = DMP_SFF_PAGE_A0_SIZE;
mbox->mbox_offset_word = 5;
mbox->ctx_buf = virt;
} else {
bf_set(lpfc_mbx_memory_dump_type3_length,
&mbox->u.mqe.un.mem_dump_type3, DMP_SFF_PAGE_A0_SIZE);
mbox->u.mqe.un.mem_dump_type3.addr_lo = putPaddrLow(mp->phys);
mbox->u.mqe.un.mem_dump_type3.addr_hi = putPaddrHigh(mp->phys);
}
mbox->vport = phba->pport;
mbox->ctx_ndlp = (struct lpfc_rdp_context *)rdp_context;

rc = lpfc_sli_issue_mbox_wait(phba, mbox, 30);
if (rc == MBX_NOT_FINISHED) {
rc = 1;
goto error;
}

if (phba->sli_rev == LPFC_SLI_REV4)
mp = (struct lpfc_dmabuf *)(mbox->ctx_buf);
else
mp = mpsave;

if (bf_get(lpfc_mqe_status, &mbox->u.mqe)) {
rc = 1;
goto error;
}

lpfc_sli_bemem_bcopy(mp->virt, &rdp_context->page_a0,
DMP_SFF_PAGE_A0_SIZE);

memset(mbox, 0, sizeof(*mbox));
memset(mp->virt, 0, DMP_SFF_PAGE_A2_SIZE);
INIT_LIST_HEAD(&mp->list);

/* save address for completion */
mbox->ctx_buf = mp;
mbox->vport = phba->pport;

bf_set(lpfc_mqe_command, &mbox->u.mqe, MBX_DUMP_MEMORY);
bf_set(lpfc_mbx_memory_dump_type3_type,
&mbox->u.mqe.un.mem_dump_type3, DMP_LMSD);
bf_set(lpfc_mbx_memory_dump_type3_link,
&mbox->u.mqe.un.mem_dump_type3, phba->sli4_hba.physical_port);
bf_set(lpfc_mbx_memory_dump_type3_page_no,
&mbox->u.mqe.un.mem_dump_type3, DMP_PAGE_A2);
if (phba->sli_rev < LPFC_SLI_REV4) {
mb = &mbox->u.mb;
mb->un.varDmp.cv = 1;
mb->un.varDmp.co = 1;
mb->un.varWords[2] = 0;
mb->un.varWords[3] = DMP_SFF_PAGE_A2_SIZE / 4;
mb->un.varWords[4] = 0;
mb->un.varWords[5] = 0;
mb->un.varWords[6] = 0;
mb->un.varWords[7] = 0;
mb->un.varWords[8] = 0;
mb->un.varWords[9] = 0;
mb->un.varWords[10] = 0;
mbox->in_ext_byte_len = DMP_SFF_PAGE_A2_SIZE;
mbox->out_ext_byte_len = DMP_SFF_PAGE_A2_SIZE;
mbox->mbox_offset_word = 5;
mbox->ctx_buf = virt;
} else {
bf_set(lpfc_mbx_memory_dump_type3_length,
&mbox->u.mqe.un.mem_dump_type3, DMP_SFF_PAGE_A2_SIZE);
mbox->u.mqe.un.mem_dump_type3.addr_lo = putPaddrLow(mp->phys);
mbox->u.mqe.un.mem_dump_type3.addr_hi = putPaddrHigh(mp->phys);
}

mbox->ctx_ndlp = (struct lpfc_rdp_context *)rdp_context;
rc = lpfc_sli_issue_mbox_wait(phba, mbox, 30);
if (bf_get(lpfc_mqe_status, &mbox->u.mqe)) {
rc = 1;
goto error;
}
rc = 0;

lpfc_sli_bemem_bcopy(mp->virt, &rdp_context->page_a2,
DMP_SFF_PAGE_A2_SIZE);

error:
mbox->ctx_buf = mpsave;
lpfc_mbox_rsrc_cleanup(phba, mbox, MBOX_THD_UNLOCKED);

return rc;

sfp_fail:
mempool_free(mbox, phba->mbox_mem_pool);
return 1;
}

/*
* lpfc_els_rcv_rdp - Process an unsolicited RDP ELS.
* @vport: pointer to a host virtual N_Port data structure.
Expand Down
5 changes: 3 additions & 2 deletions drivers/scsi/lpfc/lpfc_hw4.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -3162,7 +3162,8 @@ struct lpfc_mbx_memory_dump_type3 {
#define SFF_LENGTH_COPPER 18
#define SSF_LENGTH_50UM_OM3 19
#define SSF_VENDOR_NAME 20
#define SSF_VENDOR_OUI 36
#define SSF_TRANSCEIVER2 36
#define SSF_VENDOR_OUI 37
#define SSF_VENDOR_PN 40
#define SSF_VENDOR_REV 56
#define SSF_WAVELENGTH_B1 60
Expand Down Expand Up @@ -3281,7 +3282,7 @@ struct sff_trasnceiver_codes_byte6 {

struct sff_trasnceiver_codes_byte7 {
uint8_t fc_sp_100MB:1; /* 100 MB/sec */
uint8_t reserve:1;
uint8_t speed_chk_ecc:1;
uint8_t fc_sp_200mb:1; /* 200 MB/sec */
uint8_t fc_sp_3200MB:1; /* 3200 MB/sec */
uint8_t fc_sp_400MB:1; /* 400 MB/sec */
Expand Down

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