From: Andrew Vasquez <andrewv@marvell.com>
Date: Wed, 26 Feb 2020 14:40:13 -0800
Subject: scsi: qla2xxx: Update BPM enablement semantics.
Patch-mainline: v5.7-rc1
Git-commit: b0f18eee6fc1ee21c07abb55e9ccabc9ed9c09f0
References: bsc#1157424
commit e4e3a2ce9556 ("scsi: qla2xxx: Add ability to autodetect SFP
type") takes a heavy handed approach to BPM (Buffer Plus Management)
enablement:
1) During hardware initialization, if an LR-capable transceiver is
recognized, the driver schedules a disruptive post-initialization
chip-reset (ISP-ABORT) to allow the BPM settings to be sent to the
firmware. This chip-reset will result in (short-term) path-loss to
all fc-rports and their attached SCSI devices.
2) LR-detection is triggered during any link-up event, resulting in a
refresh and potential chip-reset
Based on firmware-team guidance, upon LR-capable transceiver
recognition, the driver's hardware initialization code will now
re-execute firmware with the new BPM settings, then continue on with
driver initialization. To address the second issue, the driver
performs LR-capable detection upon the driver receiving a
transceiver-insertion asynchronous event from firmware. No short-term
path loss is needed with this new semantic.
Link: https://lore.kernel.org/r/20200226224022.24518-10-hmadhani@marvell.com
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Andrew Vasquez <andrewv@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Acked-by: Daniel Wagner <dwagner@suse.de>
---
drivers/scsi/qla2xxx/qla_def.h | 20 +++++----
drivers/scsi/qla2xxx/qla_fw.h | 3 -
drivers/scsi/qla2xxx/qla_gbl.h | 2
drivers/scsi/qla2xxx/qla_init.c | 88 ++++++++++++++++++++++++++++------------
drivers/scsi/qla2xxx/qla_isr.c | 9 ++--
drivers/scsi/qla2xxx/qla_mbx.c | 48 +++------------------
drivers/scsi/qla2xxx/qla_os.c | 22 +++-------
7 files changed, 97 insertions(+), 95 deletions(-)
--- a/drivers/scsi/qla2xxx/qla_def.h
+++ b/drivers/scsi/qla2xxx/qla_def.h
@@ -1049,6 +1049,7 @@ static inline bool qla2xxx_is_valid_mbs(
#define MBA_TEMPERATURE_ALERT 0x8070 /* Temperature Alert */
#define MBA_DPORT_DIAGNOSTICS 0x8080 /* D-port Diagnostics */
#define MBA_TRANS_INSERT 0x8130 /* Transceiver Insertion */
+#define MBA_TRANS_REMOVE 0x8131 /* Transceiver Removal */
#define MBA_FW_INIT_FAILURE 0x8401 /* Firmware initialization failure */
#define MBA_MIRROR_LUN_CHANGE 0x8402 /* Mirror LUN State Change
Notification */
@@ -3802,8 +3803,8 @@ struct qla_hw_data {
uint32_t fw_started:1;
uint32_t fw_init_done:1;
- uint32_t detected_lr_sfp:1;
- uint32_t using_lr_setting:1;
+ uint32_t lr_detected:1;
+
uint32_t rida_fmt2:1;
uint32_t purge_mbox:1;
uint32_t n2n_bigger:1;
@@ -3812,7 +3813,7 @@ struct qla_hw_data {
} flags;
uint16_t max_exchg;
- uint16_t long_range_distance; /* 32G & above */
+ uint16_t lr_distance; /* 32G & above */
#define LR_DISTANCE_5K 1
#define LR_DISTANCE_10K 0
@@ -4969,11 +4970,14 @@ struct sff_8247_a0 {
u8 resv2[128];
};
-#define AUTO_DETECT_SFP_SUPPORT(_vha)\
- (ql2xautodetectsfp && !_vha->vp_idx && \
- (IS_QLA25XX(_vha->hw) || IS_QLA81XX(_vha->hw) ||\
- IS_QLA83XX(_vha->hw) || IS_QLA27XX(_vha->hw) || \
- IS_QLA28XX(_vha->hw)))
+/* BPM -- Buffer Plus Management support. */
+#define IS_BPM_CAPABLE(ha) \
+ (IS_QLA25XX(ha) || IS_QLA81XX(ha) || IS_QLA83XX(ha) || \
+ IS_QLA27XX(ha) || IS_QLA28XX(ha))
+#define IS_BPM_RANGE_CAPABLE(ha) \
+ (IS_QLA83XX(ha) || IS_QLA27XX(ha) || IS_QLA28XX(ha))
+#define IS_BPM_ENABLED(vha) \
+ (ql2xautodetectsfp && !vha->vp_idx && IS_BPM_CAPABLE(vha->hw))
#define FLASH_SEMAPHORE_REGISTER_ADDR 0x00101016
--- a/drivers/scsi/qla2xxx/qla_fw.h
+++ b/drivers/scsi/qla2xxx/qla_fw.h
@@ -1867,9 +1867,8 @@ struct access_chip_rsp_84xx {
/* LR Distance bit positions */
#define LR_DIST_NV_POS 2
+#define LR_DIST_NV_MASK 0xf
#define LR_DIST_FW_POS 12
-#define LR_DIST_FW_SHIFT (LR_DIST_FW_POS - LR_DIST_NV_POS)
-#define LR_DIST_FW_FIELD(x) ((x) << LR_DIST_FW_SHIFT & 0xf000)
/* FAC semaphore defines */
#define FAC_SEMAPHORE_UNLOCK 0
--- a/drivers/scsi/qla2xxx/qla_gbl.h
+++ b/drivers/scsi/qla2xxx/qla_gbl.h
@@ -109,7 +109,7 @@ int qla24xx_async_notify_ack(scsi_qla_ho
int qla24xx_post_newsess_work(struct scsi_qla_host *, port_id_t *, u8 *, u8*,
void *, u8);
int qla24xx_fcport_handle_login(struct scsi_qla_host *, fc_port_t *);
-int qla24xx_detect_sfp(scsi_qla_host_t *vha);
+int qla24xx_detect_sfp(scsi_qla_host_t *);
int qla24xx_post_gpdb_work(struct scsi_qla_host *, fc_port_t *, u8);
extern void qla28xx_get_aux_images(struct scsi_qla_host *,
--- a/drivers/scsi/qla2xxx/qla_init.c
+++ b/drivers/scsi/qla2xxx/qla_init.c
@@ -3550,53 +3550,77 @@ static void qla2xxx_print_sfp_info(struc
}
-/*
- * Return Code:
- * QLA_SUCCESS: no action
- * QLA_INTERFACE_ERROR: SFP is not there.
- * QLA_FUNCTION_FAILED: detected New SFP
+/**
+ * qla24xx_detect_sfp()
+ *
+ * @vha: adapter state pointer.
+ *
+ * @return
+ * 0 -- Configure firmware to use short-range settings -- normal
+ * buffer-to-buffer credits.
+ *
+ * 1 -- Configure firmware to use long-range settings -- extra
+ * buffer-to-buffer credits should be allocated with
+ * ha->lr_distance containing distance settings from NVRAM or SFP
+ * (if supported).
*/
int
qla24xx_detect_sfp(scsi_qla_host_t *vha)
{
- int rc = QLA_SUCCESS;
+ int rc, used_nvram;
struct sff_8247_a0 *a;
struct qla_hw_data *ha = vha->hw;
+ struct nvram_81xx *nv = ha->nvram;
+#define LR_DISTANCE_UNKNOWN 2
+ static const char * const types[] = { "Short", "Long" };
+ static const char * const lengths[] = { "(10km)", "(5km)", "" };
+ u8 ll = 0;
+
+ /* Seed with NVRAM settings. */
+ used_nvram = 0;
+ ha->flags.lr_detected = 0;
+ if (IS_BPM_RANGE_CAPABLE(ha) &&
+ (nv->enhanced_features & NEF_LR_DIST_ENABLE)) {
+ used_nvram = 1;
+ ha->flags.lr_detected = 1;
+ ha->lr_distance =
+ (nv->enhanced_features >> LR_DIST_NV_POS)
+ & LR_DIST_NV_MASK;
+ }
- if (!AUTO_DETECT_SFP_SUPPORT(vha))
+ if (!IS_BPM_ENABLED(vha))
goto out;
-
+ /* Determine SR/LR capabilities of SFP/Transceiver. */
rc = qla2x00_read_sfp_dev(vha, NULL, 0);
if (rc)
goto out;
+ used_nvram = 0;
a = (struct sff_8247_a0 *)vha->hw->sfp_data;
qla2xxx_print_sfp_info(vha);
- if (a->fc_ll_cc7 & FC_LL_VL || a->fc_ll_cc7 & FC_LL_L) {
- /* long range */
- ha->flags.detected_lr_sfp = 1;
+ ha->flags.lr_detected = 0;
+ ll = a->fc_ll_cc7;
+ if (ll & FC_LL_VL || ll & FC_LL_L) {
+ /* Long range, track length. */
+ ha->flags.lr_detected = 1;
if (a->length_km > 5 || a->length_100m > 50)
- ha->long_range_distance = LR_DISTANCE_10K;
+ ha->lr_distance = LR_DISTANCE_10K;
else
- ha->long_range_distance = LR_DISTANCE_5K;
-
- if (ha->flags.detected_lr_sfp != ha->flags.using_lr_setting)
- ql_dbg(ql_dbg_async, vha, 0x507b,
- "Detected Long Range SFP.\n");
- } else {
- /* short range */
- ha->flags.detected_lr_sfp = 0;
- if (ha->flags.using_lr_setting)
- ql_dbg(ql_dbg_async, vha, 0x5084,
- "Detected Short Range SFP.\n");
+ ha->lr_distance = LR_DISTANCE_5K;
}
if (!vha->flags.init_done)
rc = QLA_SUCCESS;
out:
- return rc;
+ ql_dbg(ql_dbg_async, vha, 0x507b,
+ "SFP detect: %s-Range SFP %s (nvr=%x ll=%x lr=%x lrd=%x).\n",
+ types[ha->flags.lr_detected],
+ ha->flags.lr_detected ? lengths[ha->lr_distance] :
+ lengths[LR_DISTANCE_UNKNOWN],
+ used_nvram, ll, ha->flags.lr_detected, ha->lr_distance);
+ return ha->flags.lr_detected;
}
/**
@@ -3614,6 +3638,7 @@ qla2x00_setup_chip(scsi_qla_host_t *vha)
struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
unsigned long flags;
uint16_t fw_major_version;
+ int done_once = 0;
if (IS_P3P_TYPE(ha)) {
rval = ha->isp_ops->load_risc(vha, &srisc_address);
@@ -3634,6 +3659,7 @@ qla2x00_setup_chip(scsi_qla_host_t *vha)
qla81xx_mpi_sync(vha);
+execute_fw_with_lr:
/* Load firmware sequences */
rval = ha->isp_ops->load_risc(vha, &srisc_address);
if (rval == QLA_SUCCESS) {
@@ -3655,7 +3681,15 @@ qla2x00_setup_chip(scsi_qla_host_t *vha)
rval = qla2x00_execute_fw(vha, srisc_address);
/* Retrieve firmware information. */
if (rval == QLA_SUCCESS) {
- qla24xx_detect_sfp(vha);
+ /* Enable BPM support? */
+ if (!done_once++ && qla24xx_detect_sfp(vha)) {
+ ql_dbg(ql_dbg_init, vha, 0x00ca,
+ "Re-starting firmware -- BPM.\n");
+ /* Best-effort - re-init. */
+ ha->isp_ops->reset_chip(vha);
+ ha->isp_ops->chip_diag(vha);
+ goto execute_fw_with_lr;
+ }
if ((IS_QLA83XX(ha) || IS_QLA27XX(ha) ||
IS_QLA28XX(ha)) &&
@@ -3932,6 +3966,10 @@ qla24xx_update_fw_options(scsi_qla_host_
if (ql2xrdpenable)
ha->fw_options[1] |= ADD_FO1_ENABLE_PUREX_IOCB;
+ /* Enable Async 8130/8131 events -- transceiver insertion/removal */
+ if (IS_BPM_RANGE_CAPABLE(ha))
+ ha->fw_options[3] |= BIT_10;
+
ql_dbg(ql_dbg_init, vha, 0x00e8,
"%s, add FW options 1-3 = 0x%04x 0x%04x 0x%04x mode %x\n",
__func__, ha->fw_options[1], ha->fw_options[2],
--- a/drivers/scsi/qla2xxx/qla_isr.c
+++ b/drivers/scsi/qla2xxx/qla_isr.c
@@ -960,10 +960,6 @@ skip_rio:
vha->flags.management_server_logged_in = 0;
qla2x00_post_aen_work(vha, FCH_EVT_LINKUP, ha->link_data_rate);
- if (AUTO_DETECT_SFP_SUPPORT(vha)) {
- set_bit(DETECT_SFP_CHANGE, &vha->dpc_flags);
- qla2xxx_wake_dpc(vha);
- }
break;
case MBA_LOOP_DOWN: /* Loop Down Event */
@@ -1436,6 +1432,11 @@ global_port_update:
case MBA_TRANS_INSERT:
ql_dbg(ql_dbg_async, vha, 0x5091,
"Transceiver Insertion: %04x\n", mb[1]);
+ set_bit(DETECT_SFP_CHANGE, &vha->dpc_flags);
+ break;
+
+ case MBA_TRANS_REMOVE:
+ ql_dbg(ql_dbg_async, vha, 0x5091, "Transceiver Removal\n");
break;
default:
--- a/drivers/scsi/qla2xxx/qla_mbx.c
+++ b/drivers/scsi/qla2xxx/qla_mbx.c
@@ -643,28 +643,6 @@ qla2x00_load_ram(scsi_qla_host_t *vha, d
}
#define NVME_ENABLE_FLAG BIT_3
-static inline uint16_t qla25xx_set_sfp_lr_dist(struct qla_hw_data *ha)
-{
- uint16_t mb4 = BIT_0;
-
- if (IS_QLA83XX(ha) || IS_QLA27XX(ha) || IS_QLA28XX(ha))
- mb4 |= ha->long_range_distance << LR_DIST_FW_POS;
-
- return mb4;
-}
-
-static inline uint16_t qla25xx_set_nvr_lr_dist(struct qla_hw_data *ha)
-{
- uint16_t mb4 = BIT_0;
-
- if (IS_QLA83XX(ha) || IS_QLA27XX(ha) || IS_QLA28XX(ha)) {
- struct nvram_81xx *nv = ha->nvram;
-
- mb4 |= LR_DIST_FW_FIELD(nv->enhanced_features);
- }
-
- return mb4;
-}
/*
* qla2x00_execute_fw
@@ -701,25 +679,13 @@ qla2x00_execute_fw(scsi_qla_host_t *vha,
mcp->mb[3] = 0;
mcp->mb[4] = 0;
mcp->mb[11] = 0;
- ha->flags.using_lr_setting = 0;
- if (IS_QLA25XX(ha) || IS_QLA81XX(ha) || IS_QLA83XX(ha) ||
- IS_QLA27XX(ha) || IS_QLA28XX(ha)) {
- if (ql2xautodetectsfp) {
- if (ha->flags.detected_lr_sfp) {
- mcp->mb[4] |=
- qla25xx_set_sfp_lr_dist(ha);
- ha->flags.using_lr_setting = 1;
- }
- } else {
- struct nvram_81xx *nv = ha->nvram;
- /* set LR distance if specified in nvram */
- if (nv->enhanced_features &
- NEF_LR_DIST_ENABLE) {
- mcp->mb[4] |=
- qla25xx_set_nvr_lr_dist(ha);
- ha->flags.using_lr_setting = 1;
- }
- }
+
+ /* Enable BPM? */
+ if (ha->flags.lr_detected) {
+ mcp->mb[4] = BIT_0;
+ if (IS_BPM_RANGE_CAPABLE(ha))
+ mcp->mb[4] |=
+ ha->lr_distance << LR_DIST_FW_POS;
}
if (ql2xnvmeenable && (IS_QLA27XX(ha) || IS_QLA28XX(ha)))
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -3476,13 +3476,6 @@ skip_dpc:
if (test_bit(UNLOADING, &base_vha->dpc_flags))
return -ENODEV;
- if (ha->flags.detected_lr_sfp) {
- ql_log(ql_log_info, base_vha, 0xffff,
- "Reset chip to pick up LR SFP setting\n");
- set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
- qla2xxx_wake_dpc(base_vha);
- }
-
return 0;
probe_failed:
@@ -6894,13 +6887,14 @@ qla2x00_do_dpc(void *data)
}
if (test_and_clear_bit(DETECT_SFP_CHANGE,
- &base_vha->dpc_flags) &&
- !test_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags)) {
- qla24xx_detect_sfp(base_vha);
-
- if (ha->flags.detected_lr_sfp !=
- ha->flags.using_lr_setting)
- set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
+ &base_vha->dpc_flags)) {
+ /* Semantic:
+ * - NO-OP -- await next ISP-ABORT. Preferred method
+ * to minimize disruptions that will occur
+ * when a forced chip-reset occurs.
+ * - Force -- ISP-ABORT scheduled.
+ */
+ /* set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags); */
}
if (test_and_clear_bit