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authorRalph Campbell <ralph.campbell@qlogic.com>2010-05-26 19:08:44 -0400
committerRoland Dreier <rolandd@cisco.com>2010-05-26 19:37:39 -0400
commita77fcf895046664927dd6eea816602b87a1a6337 (patch)
treea096dff805931d6b53bc5a8f0c185a7bb9558e70 /drivers
parentf27ec1d6db4aa3348ca7be896f1466599aecea3e (diff)
IB/qib: Use a single txselect module parameter for serdes tuning
As part of the earlier patches submitted and reviewed, it was agreed to change the way serdes tuning parameters were specified to the driver. The updated patch got dropped by the linux-rdma email list so the earlier version of qib_iba7322.c ended up being used. This patch updates qib_iab7322.c to the simpler, single parameter method of setting the serdes parameters. Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/infiniband/hw/qib/qib_iba7322.c582
1 files changed, 179 insertions, 403 deletions
diff --git a/drivers/infiniband/hw/qib/qib_iba7322.c b/drivers/infiniband/hw/qib/qib_iba7322.c
index 2c24eab35b54..23fb9efe20a4 100644
--- a/drivers/infiniband/hw/qib/qib_iba7322.c
+++ b/drivers/infiniband/hw/qib/qib_iba7322.c
@@ -114,40 +114,18 @@ static ushort qib_singleport;
114module_param_named(singleport, qib_singleport, ushort, S_IRUGO); 114module_param_named(singleport, qib_singleport, ushort, S_IRUGO);
115MODULE_PARM_DESC(singleport, "Use only IB port 1; more per-port buffer space"); 115MODULE_PARM_DESC(singleport, "Use only IB port 1; more per-port buffer space");
116 116
117
118/*
119 * Setup QMH7342 receive and transmit parameters, necessary because
120 * each bay, Mez connector, and IB port need different tuning, beyond
121 * what the switch and HCA can do automatically.
122 * It's expected to be done by cat'ing files to the modules file,
123 * rather than setting up as a module parameter.
124 * It's a "write-only" file, returns 0 when read back.
125 * The unit, port, bay (if given), and values MUST be done as a single write.
126 * The unit, port, and bay must precede the values to be effective.
127 */
128static int setup_qmh_params(const char *, struct kernel_param *);
129static unsigned dummy_qmh_params;
130module_param_call(qmh_serdes_setup, setup_qmh_params, param_get_uint,
131 &dummy_qmh_params, S_IWUSR | S_IRUGO);
132
133/* similarly for QME7342, but it's simpler */
134static int setup_qme_params(const char *, struct kernel_param *);
135static unsigned dummy_qme_params;
136module_param_call(qme_serdes_setup, setup_qme_params, param_get_uint,
137 &dummy_qme_params, S_IWUSR | S_IRUGO);
138
139#define MAX_ATTEN_LEN 64 /* plenty for any real system */ 117#define MAX_ATTEN_LEN 64 /* plenty for any real system */
140/* for read back, default index is ~5m copper cable */ 118/* for read back, default index is ~5m copper cable */
141static char cable_atten_list[MAX_ATTEN_LEN] = "10"; 119static char txselect_list[MAX_ATTEN_LEN] = "10";
142static struct kparam_string kp_cable_atten = { 120static struct kparam_string kp_txselect = {
143 .string = cable_atten_list, 121 .string = txselect_list,
144 .maxlen = MAX_ATTEN_LEN 122 .maxlen = MAX_ATTEN_LEN
145}; 123};
146static int setup_cable_atten(const char *, struct kernel_param *); 124static int setup_txselect(const char *, struct kernel_param *);
147module_param_call(cable_atten, setup_cable_atten, param_get_string, 125module_param_call(txselect, setup_txselect, param_get_string,
148 &kp_cable_atten, S_IWUSR | S_IRUGO); 126 &kp_txselect, S_IWUSR | S_IRUGO);
149MODULE_PARM_DESC(cable_atten, \ 127MODULE_PARM_DESC(txselect, \
150 "cable attenuation indices for cables with invalid EEPROM"); 128 "Tx serdes indices (for no QSFP or invalid QSFP data)");
151 129
152#define BOARD_QME7342 5 130#define BOARD_QME7342 5
153#define BOARD_QMH7342 6 131#define BOARD_QMH7342 6
@@ -574,11 +552,12 @@ struct vendor_txdds_ent {
574static void write_tx_serdes_param(struct qib_pportdata *, struct txdds_ent *); 552static void write_tx_serdes_param(struct qib_pportdata *, struct txdds_ent *);
575 553
576#define TXDDS_TABLE_SZ 16 /* number of entries per speed in onchip table */ 554#define TXDDS_TABLE_SZ 16 /* number of entries per speed in onchip table */
555#define TXDDS_EXTRA_SZ 11 /* number of extra tx settings entries */
577#define SERDES_CHANS 4 /* yes, it's obvious, but one less magic number */ 556#define SERDES_CHANS 4 /* yes, it's obvious, but one less magic number */
578 557
579#define H1_FORCE_VAL 8 558#define H1_FORCE_VAL 8
580#define H1_FORCE_QME 1 /* may be overridden via setup_qme_params() */ 559#define H1_FORCE_QME 1 /* may be overridden via setup_txselect() */
581#define H1_FORCE_QMH 7 /* may be overridden via setup_qmh_params() */ 560#define H1_FORCE_QMH 7 /* may be overridden via setup_txselect() */
582 561
583/* The static and dynamic registers are paired, and the pairs indexed by spd */ 562/* The static and dynamic registers are paired, and the pairs indexed by spd */
584#define krp_static_adapt_dis(spd) (KREG_IBPORT_IDX(ADAPT_DISABLE_STATIC_SDR) \ 563#define krp_static_adapt_dis(spd) (KREG_IBPORT_IDX(ADAPT_DISABLE_STATIC_SDR) \
@@ -590,15 +569,6 @@ static void write_tx_serdes_param(struct qib_pportdata *, struct txdds_ent *);
590#define QDR_STATIC_ADAPT_INIT 0xffffffffffULL /* up, disable H0,H1-8, LE */ 569#define QDR_STATIC_ADAPT_INIT 0xffffffffffULL /* up, disable H0,H1-8, LE */
591#define QDR_STATIC_ADAPT_INIT_R1 0xf0ffffffffULL /* r1 up, disable H0,H1-8 */ 570#define QDR_STATIC_ADAPT_INIT_R1 0xf0ffffffffULL /* r1 up, disable H0,H1-8 */
592 571
593static const struct txdds_ent qmh_sdr_txdds = { 11, 0, 5, 6 };
594static const struct txdds_ent qmh_ddr_txdds = { 7, 0, 2, 8 };
595static const struct txdds_ent qmh_qdr_txdds = { 0, 1, 3, 10 };
596
597/* this is used for unknown mez cards also */
598static const struct txdds_ent qme_sdr_txdds = { 11, 0, 4, 4 };
599static const struct txdds_ent qme_ddr_txdds = { 7, 0, 2, 7 };
600static const struct txdds_ent qme_qdr_txdds = { 0, 1, 12, 11 };
601
602struct qib_chippport_specific { 572struct qib_chippport_specific {
603 u64 __iomem *kpregbase; 573 u64 __iomem *kpregbase;
604 u64 __iomem *cpregbase; 574 u64 __iomem *cpregbase;
@@ -637,12 +607,8 @@ struct qib_chippport_specific {
637 * Per-bay per-channel rcv QMH H1 values and Tx values for QDR. 607 * Per-bay per-channel rcv QMH H1 values and Tx values for QDR.
638 * entry zero is unused, to simplify indexing 608 * entry zero is unused, to simplify indexing
639 */ 609 */
640 u16 h1_val; 610 u8 h1_val;
641 u8 amp[SERDES_CHANS]; 611 u8 no_eep; /* txselect table index to use if no qsfp info */
642 u8 pre[SERDES_CHANS];
643 u8 mainv[SERDES_CHANS];
644 u8 post[SERDES_CHANS];
645 u8 no_eep; /* attenuation index to use if no qsfp info */
646 u8 ipg_tries; 612 u8 ipg_tries;
647 u8 ibmalfusesnap; 613 u8 ibmalfusesnap;
648 struct qib_qsfp_data qsfp_data; 614 struct qib_qsfp_data qsfp_data;
@@ -5360,7 +5326,13 @@ static int qib_7322_ib_updown(struct qib_pportdata *ppd, int ibup, u64 ibcs)
5360 QIBL_IB_AUTONEG_INPROG))) 5326 QIBL_IB_AUTONEG_INPROG)))
5361 set_7322_ibspeed_fast(ppd, ppd->link_speed_enabled); 5327 set_7322_ibspeed_fast(ppd, ppd->link_speed_enabled);
5362 if (!(ppd->lflags & QIBL_IB_AUTONEG_INPROG)) { 5328 if (!(ppd->lflags & QIBL_IB_AUTONEG_INPROG)) {
5329 /* unlock the Tx settings, speed may change */
5330 qib_write_kreg_port(ppd, krp_tx_deemph_override,
5331 SYM_MASK(IBSD_TX_DEEMPHASIS_OVERRIDE_0,
5332 reset_tx_deemphasis_override));
5363 qib_cancel_sends(ppd); 5333 qib_cancel_sends(ppd);
5334 /* on link down, ensure sane pcs state */
5335 qib_7322_mini_pcs_reset(ppd);
5364 spin_lock_irqsave(&ppd->sdma_lock, flags); 5336 spin_lock_irqsave(&ppd->sdma_lock, flags);
5365 if (__qib_sdma_running(ppd)) 5337 if (__qib_sdma_running(ppd))
5366 __qib_sdma_process_event(ppd, 5338 __qib_sdma_process_event(ppd,
@@ -5766,26 +5738,28 @@ static void qib_init_7322_qsfp(struct qib_pportdata *ppd)
5766} 5738}
5767 5739
5768/* 5740/*
5769 * called at device initialization time, and also if the cable_atten 5741 * called at device initialization time, and also if the txselect
5770 * module parameter is changed. This is used for cables that don't 5742 * module parameter is changed. This is used for cables that don't
5771 * have valid QSFP EEPROMs (not present, or attenuation is zero). 5743 * have valid QSFP EEPROMs (not present, or attenuation is zero).
5772 * We initialize to the default, then if there is a specific 5744 * We initialize to the default, then if there is a specific
5773 * unit,port match, we use that. 5745 * unit,port match, we use that (and set it immediately, for the
5746 * current speed, if the link is at INIT or better).
5774 * String format is "default# unit#,port#=# ... u,p=#", separators must 5747 * String format is "default# unit#,port#=# ... u,p=#", separators must
5775 * be a SPACE character. A newline terminates. 5748 * be a SPACE character. A newline terminates. The u,p=# tuples may
5749 * optionally have "u,p=#,#", where the final # is the H1 value
5776 * The last specific match is used (actually, all are used, but last 5750 * The last specific match is used (actually, all are used, but last
5777 * one is the one that winds up set); if none at all, fall back on default. 5751 * one is the one that winds up set); if none at all, fall back on default.
5778 */ 5752 */
5779static void set_no_qsfp_atten(struct qib_devdata *dd, int change) 5753static void set_no_qsfp_atten(struct qib_devdata *dd, int change)
5780{ 5754{
5781 char *nxt, *str; 5755 char *nxt, *str;
5782 int pidx, unit, port, deflt; 5756 u32 pidx, unit, port, deflt, h1;
5783 unsigned long val; 5757 unsigned long val;
5784 int any = 0; 5758 int any = 0, seth1;
5785 5759
5786 str = cable_atten_list; 5760 str = txselect_list;
5787 5761
5788 /* default number is validated in setup_cable_atten() */ 5762 /* default number is validated in setup_txselect() */
5789 deflt = simple_strtoul(str, &nxt, 0); 5763 deflt = simple_strtoul(str, &nxt, 0);
5790 for (pidx = 0; pidx < dd->num_pports; ++pidx) 5764 for (pidx = 0; pidx < dd->num_pports; ++pidx)
5791 dd->pport[pidx].cpspec->no_eep = deflt; 5765 dd->pport[pidx].cpspec->no_eep = deflt;
@@ -5812,16 +5786,28 @@ static void set_no_qsfp_atten(struct qib_devdata *dd, int change)
5812 ; 5786 ;
5813 continue; 5787 continue;
5814 } 5788 }
5815 if (val >= TXDDS_TABLE_SZ) 5789 if (val >= TXDDS_TABLE_SZ + TXDDS_EXTRA_SZ)
5816 continue; 5790 continue;
5791 seth1 = 0;
5792 h1 = 0; /* gcc thinks it might be used uninitted */
5793 if (*nxt == ',' && nxt[1]) {
5794 str = ++nxt;
5795 h1 = (u32)simple_strtoul(str, &nxt, 0);
5796 if (nxt == str)
5797 while (*nxt && *nxt++ != ' ') /* skip */
5798 ;
5799 else
5800 seth1 = 1;
5801 }
5817 for (pidx = 0; dd->unit == unit && pidx < dd->num_pports; 5802 for (pidx = 0; dd->unit == unit && pidx < dd->num_pports;
5818 ++pidx) { 5803 ++pidx) {
5819 if (dd->pport[pidx].port != port || 5804 struct qib_pportdata *ppd = &dd->pport[pidx];
5820 !dd->pport[pidx].link_speed_supported) 5805
5806 if (ppd->port != port || !ppd->link_speed_supported)
5821 continue; 5807 continue;
5822 dd->pport[pidx].cpspec->no_eep = val; 5808 ppd->cpspec->no_eep = val;
5823 /* now change the IBC and serdes, overriding generic */ 5809 /* now change the IBC and serdes, overriding generic */
5824 init_txdds_table(&dd->pport[pidx], 1); 5810 init_txdds_table(ppd, 1);
5825 any++; 5811 any++;
5826 } 5812 }
5827 if (*nxt == '\n') 5813 if (*nxt == '\n')
@@ -5832,35 +5818,35 @@ static void set_no_qsfp_atten(struct qib_devdata *dd, int change)
5832 * Change the IBC and serdes, but since it's 5818 * Change the IBC and serdes, but since it's
5833 * general, don't override specific settings. 5819 * general, don't override specific settings.
5834 */ 5820 */
5835 for (pidx = 0; pidx < dd->num_pports; ++pidx) { 5821 for (pidx = 0; pidx < dd->num_pports; ++pidx)
5836 if (!dd->pport[pidx].link_speed_supported) 5822 if (dd->pport[pidx].link_speed_supported)
5837 continue; 5823 init_txdds_table(&dd->pport[pidx], 0);
5838 init_txdds_table(&dd->pport[pidx], 0);
5839 }
5840 } 5824 }
5841} 5825}
5842 5826
5843/* handle the cable_atten parameter changing */ 5827/* handle the txselect parameter changing */
5844static int setup_cable_atten(const char *str, struct kernel_param *kp) 5828static int setup_txselect(const char *str, struct kernel_param *kp)
5845{ 5829{
5846 struct qib_devdata *dd; 5830 struct qib_devdata *dd;
5847 unsigned long val; 5831 unsigned long val;
5848 char *n; 5832 char *n;
5849 if (strlen(str) >= MAX_ATTEN_LEN) { 5833 if (strlen(str) >= MAX_ATTEN_LEN) {
5850 printk(KERN_INFO QIB_DRV_NAME " cable_atten_values string " 5834 printk(KERN_INFO QIB_DRV_NAME " txselect_values string "
5851 "too long\n"); 5835 "too long\n");
5852 return -ENOSPC; 5836 return -ENOSPC;
5853 } 5837 }
5854 val = simple_strtoul(str, &n, 0); 5838 val = simple_strtoul(str, &n, 0);
5855 if (n == str || val >= TXDDS_TABLE_SZ) { 5839 if (n == str || val >= (TXDDS_TABLE_SZ + TXDDS_EXTRA_SZ)) {
5856 printk(KERN_INFO QIB_DRV_NAME 5840 printk(KERN_INFO QIB_DRV_NAME
5857 "cable_atten_values must start with a number\n"); 5841 "txselect_values must start with a number < %d\n",
5842 TXDDS_TABLE_SZ + TXDDS_EXTRA_SZ);
5858 return -EINVAL; 5843 return -EINVAL;
5859 } 5844 }
5860 strcpy(cable_atten_list, str); 5845 strcpy(txselect_list, str);
5861 5846
5862 list_for_each_entry(dd, &qib_dev_list, list) 5847 list_for_each_entry(dd, &qib_dev_list, list)
5863 set_no_qsfp_atten(dd, 1); 5848 if (dd->deviceid == PCI_DEVICE_ID_QLOGIC_IB_7322)
5849 set_no_qsfp_atten(dd, 1);
5864 return 0; 5850 return 0;
5865} 5851}
5866 5852
@@ -6261,28 +6247,17 @@ static int qib_init_7322_variables(struct qib_devdata *dd)
6261 * in adapter-specific routines. 6247 * in adapter-specific routines.
6262 */ 6248 */
6263 if (!(ppd->dd->flags & QIB_HAS_QSFP)) { 6249 if (!(ppd->dd->flags & QIB_HAS_QSFP)) {
6264 int i;
6265 const struct txdds_ent *txdds;
6266
6267 if (!IS_QMH(ppd->dd) && !IS_QME(ppd->dd)) 6250 if (!IS_QMH(ppd->dd) && !IS_QME(ppd->dd))
6268 qib_devinfo(ppd->dd->pcidev, "IB%u:%u: " 6251 qib_devinfo(ppd->dd->pcidev, "IB%u:%u: "
6269 "Unknown mezzanine card type\n", 6252 "Unknown mezzanine card type\n",
6270 ppd->dd->unit, ppd->port); 6253 dd->unit, ppd->port);
6271 txdds = IS_QMH(ppd->dd) ? &qmh_qdr_txdds : 6254 cp->h1_val = IS_QMH(dd) ? H1_FORCE_QMH : H1_FORCE_QME;
6272 &qme_qdr_txdds;
6273
6274 /* 6255 /*
6275 * set values in case link comes up 6256 * Choose center value as default tx serdes setting
6276 * before table is written to driver. 6257 * until changed through module parameter.
6277 */ 6258 */
6278 cp->h1_val = IS_QMH(ppd->dd) ? H1_FORCE_QMH : 6259 ppd->cpspec->no_eep = IS_QMH(dd) ?
6279 H1_FORCE_QME; 6260 TXDDS_TABLE_SZ + 2 : TXDDS_TABLE_SZ + 4;
6280 for (i = 0; i < SERDES_CHANS; i++) {
6281 cp->amp[i] = txdds->amp;
6282 cp->pre[i] = txdds->pre;
6283 cp->mainv[i] = txdds->main;
6284 cp->post[i] = txdds->post;
6285 }
6286 } else 6261 } else
6287 cp->h1_val = H1_FORCE_VAL; 6262 cp->h1_val = H1_FORCE_VAL;
6288 6263
@@ -6299,8 +6274,7 @@ static int qib_init_7322_variables(struct qib_devdata *dd)
6299 6274
6300 dd->rcvhdrentsize = QIB_RCVHDR_ENTSIZE; 6275 dd->rcvhdrentsize = QIB_RCVHDR_ENTSIZE;
6301 dd->rcvhdrsize = QIB_DFLT_RCVHDRSIZE; 6276 dd->rcvhdrsize = QIB_DFLT_RCVHDRSIZE;
6302 dd->rhf_offset = 6277 dd->rhf_offset = dd->rcvhdrentsize - sizeof(u64) / sizeof(u32);
6303 dd->rcvhdrentsize - sizeof(u64) / sizeof(u32);
6304 6278
6305 /* we always allocate at least 2048 bytes for eager buffers */ 6279 /* we always allocate at least 2048 bytes for eager buffers */
6306 dd->rcvegrbufsize = max(mtu, 2048); 6280 dd->rcvegrbufsize = max(mtu, 2048);
@@ -7111,8 +7085,8 @@ static const struct txdds_ent txdds_ddr[TXDDS_TABLE_SZ] = {
7111static const struct txdds_ent txdds_qdr[TXDDS_TABLE_SZ] = { 7085static const struct txdds_ent txdds_qdr[TXDDS_TABLE_SZ] = {
7112 /* amp, pre, main, post */ 7086 /* amp, pre, main, post */
7113 { 2, 2, 15, 6 }, /* Loopback */ 7087 { 2, 2, 15, 6 }, /* Loopback */
7114 { 0, 1, 0, 7 }, /* 2 dB */ 7088 { 0, 1, 0, 7 }, /* 2 dB (also QMH7342) */
7115 { 0, 1, 0, 9 }, /* 3 dB */ 7089 { 0, 1, 0, 9 }, /* 3 dB (also QMH7342) */
7116 { 0, 1, 0, 11 }, /* 4 dB */ 7090 { 0, 1, 0, 11 }, /* 4 dB */
7117 { 0, 1, 0, 13 }, /* 5 dB */ 7091 { 0, 1, 0, 13 }, /* 5 dB */
7118 { 0, 1, 0, 15 }, /* 6 dB */ 7092 { 0, 1, 0, 15 }, /* 6 dB */
@@ -7128,6 +7102,57 @@ static const struct txdds_ent txdds_qdr[TXDDS_TABLE_SZ] = {
7128 { 0, 2, 9, 15 }, /* 16 dB */ 7102 { 0, 2, 9, 15 }, /* 16 dB */
7129}; 7103};
7130 7104
7105/*
7106 * extra entries for use with txselect, for indices >= TXDDS_TABLE_SZ.
7107 * These are mostly used for mez cards going through connectors
7108 * and backplane traces, but can be used to add other "unusual"
7109 * table values as well.
7110 */
7111static const struct txdds_ent txdds_extra_sdr[TXDDS_EXTRA_SZ] = {
7112 /* amp, pre, main, post */
7113 { 0, 0, 0, 1 }, /* QMH7342 backplane settings */
7114 { 0, 0, 0, 1 }, /* QMH7342 backplane settings */
7115 { 0, 0, 0, 2 }, /* QMH7342 backplane settings */
7116 { 0, 0, 0, 2 }, /* QMH7342 backplane settings */
7117 { 0, 0, 0, 11 }, /* QME7342 backplane settings */
7118 { 0, 0, 0, 11 }, /* QME7342 backplane settings */
7119 { 0, 0, 0, 11 }, /* QME7342 backplane settings */
7120 { 0, 0, 0, 11 }, /* QME7342 backplane settings */
7121 { 0, 0, 0, 11 }, /* QME7342 backplane settings */
7122 { 0, 0, 0, 11 }, /* QME7342 backplane settings */
7123 { 0, 0, 0, 11 }, /* QME7342 backplane settings */
7124};
7125
7126static const struct txdds_ent txdds_extra_ddr[TXDDS_EXTRA_SZ] = {
7127 /* amp, pre, main, post */
7128 { 0, 0, 0, 7 }, /* QMH7342 backplane settings */
7129 { 0, 0, 0, 7 }, /* QMH7342 backplane settings */
7130 { 0, 0, 0, 8 }, /* QMH7342 backplane settings */
7131 { 0, 0, 0, 8 }, /* QMH7342 backplane settings */
7132 { 0, 0, 0, 13 }, /* QME7342 backplane settings */
7133 { 0, 0, 0, 13 }, /* QME7342 backplane settings */
7134 { 0, 0, 0, 13 }, /* QME7342 backplane settings */
7135 { 0, 0, 0, 13 }, /* QME7342 backplane settings */
7136 { 0, 0, 0, 13 }, /* QME7342 backplane settings */
7137 { 0, 0, 0, 13 }, /* QME7342 backplane settings */
7138 { 0, 0, 0, 13 }, /* QME7342 backplane settings */
7139};
7140
7141static const struct txdds_ent txdds_extra_qdr[TXDDS_EXTRA_SZ] = {
7142 /* amp, pre, main, post */
7143 { 0, 1, 0, 4 }, /* QMH7342 backplane settings */
7144 { 0, 1, 0, 5 }, /* QMH7342 backplane settings */
7145 { 0, 1, 0, 6 }, /* QMH7342 backplane settings */
7146 { 0, 1, 0, 8 }, /* QMH7342 backplane settings */
7147 { 0, 1, 12, 10 }, /* QME7342 backplane setting */
7148 { 0, 1, 12, 11 }, /* QME7342 backplane setting */
7149 { 0, 1, 12, 12 }, /* QME7342 backplane setting */
7150 { 0, 1, 12, 14 }, /* QME7342 backplane setting */
7151 { 0, 1, 12, 6 }, /* QME7342 backplane setting */
7152 { 0, 1, 12, 7 }, /* QME7342 backplane setting */
7153 { 0, 1, 12, 8 }, /* QME7342 backplane setting */
7154};
7155
7131static const struct txdds_ent *get_atten_table(const struct txdds_ent *txdds, 7156static const struct txdds_ent *get_atten_table(const struct txdds_ent *txdds,
7132 unsigned atten) 7157 unsigned atten)
7133{ 7158{
@@ -7145,7 +7170,7 @@ static const struct txdds_ent *get_atten_table(const struct txdds_ent *txdds,
7145} 7170}
7146 7171
7147/* 7172/*
7148 * if override is set, the module parameter cable_atten has a value 7173 * if override is set, the module parameter txselect has a value
7149 * for this specific port, so use it, rather than our normal mechanism. 7174 * for this specific port, so use it, rather than our normal mechanism.
7150 */ 7175 */
7151static void find_best_ent(struct qib_pportdata *ppd, 7176static void find_best_ent(struct qib_pportdata *ppd,
@@ -7184,15 +7209,28 @@ static void find_best_ent(struct qib_pportdata *ppd,
7184 *ddr_dds = get_atten_table(txdds_ddr, qd->atten[0]); 7209 *ddr_dds = get_atten_table(txdds_ddr, qd->atten[0]);
7185 *qdr_dds = get_atten_table(txdds_qdr, qd->atten[1]); 7210 *qdr_dds = get_atten_table(txdds_qdr, qd->atten[1]);
7186 return; 7211 return;
7187 } else { 7212 } else if (ppd->cpspec->no_eep < TXDDS_TABLE_SZ) {
7188 /* 7213 /*
7189 * If we have no (or incomplete) data from the cable 7214 * If we have no (or incomplete) data from the cable
7190 * EEPROM, or no QSFP, use the module parameter value 7215 * EEPROM, or no QSFP, or override is set, use the
7191 * to index into the attentuation table. 7216 * module parameter value to index into the attentuation
7217 * table.
7192 */ 7218 */
7193 *sdr_dds = &txdds_sdr[ppd->cpspec->no_eep]; 7219 idx = ppd->cpspec->no_eep;
7194 *ddr_dds = &txdds_ddr[ppd->cpspec->no_eep]; 7220 *sdr_dds = &txdds_sdr[idx];
7195 *qdr_dds = &txdds_qdr[ppd->cpspec->no_eep]; 7221 *ddr_dds = &txdds_ddr[idx];
7222 *qdr_dds = &txdds_qdr[idx];
7223 } else if (ppd->cpspec->no_eep < (TXDDS_TABLE_SZ + TXDDS_EXTRA_SZ)) {
7224 /* similar to above, but index into the "extra" table. */
7225 idx = ppd->cpspec->no_eep - TXDDS_TABLE_SZ;
7226 *sdr_dds = &txdds_extra_sdr[idx];
7227 *ddr_dds = &txdds_extra_ddr[idx];
7228 *qdr_dds = &txdds_extra_qdr[idx];
7229 } else {
7230 /* this shouldn't happen, it's range checked */
7231 *sdr_dds = txdds_sdr + qib_long_atten;
7232 *ddr_dds = txdds_ddr + qib_long_atten;
7233 *qdr_dds = txdds_qdr + qib_long_atten;
7196 } 7234 }
7197} 7235}
7198 7236
@@ -7203,33 +7241,24 @@ static void init_txdds_table(struct qib_pportdata *ppd, int override)
7203 int idx; 7241 int idx;
7204 int single_ent = 0; 7242 int single_ent = 0;
7205 7243
7206 if (IS_QMH(ppd->dd)) { 7244 find_best_ent(ppd, &sdr_dds, &ddr_dds, &qdr_dds, override);
7207 /* normally will be overridden, via setup_qmh() */ 7245
7208 sdr_dds = &qmh_sdr_txdds; 7246 /* for mez cards or override, use the selected value for all entries */
7209 ddr_dds = &qmh_ddr_txdds; 7247 if (!(ppd->dd->flags & QIB_HAS_QSFP) || override)
7210 qdr_dds = &qmh_qdr_txdds;
7211 single_ent = 1;
7212 } else if (IS_QME(ppd->dd)) {
7213 sdr_dds = &qme_sdr_txdds;
7214 ddr_dds = &qme_ddr_txdds;
7215 qdr_dds = &qme_qdr_txdds;
7216 single_ent = 1; 7248 single_ent = 1;
7217 } else
7218 find_best_ent(ppd, &sdr_dds, &ddr_dds, &qdr_dds, override);
7219 7249
7220 /* Fill in the first entry with the best entry found. */ 7250 /* Fill in the first entry with the best entry found. */
7221 set_txdds(ppd, 0, sdr_dds); 7251 set_txdds(ppd, 0, sdr_dds);
7222 set_txdds(ppd, TXDDS_TABLE_SZ, ddr_dds); 7252 set_txdds(ppd, TXDDS_TABLE_SZ, ddr_dds);
7223 set_txdds(ppd, 2 * TXDDS_TABLE_SZ, qdr_dds); 7253 set_txdds(ppd, 2 * TXDDS_TABLE_SZ, qdr_dds);
7224 7254 if (ppd->lflags & (QIBL_LINKINIT | QIBL_LINKARMED |
7225 /* 7255 QIBL_LINKACTIVE)) {
7226 * for our current speed, also write that value into the 7256 dds = (struct txdds_ent *)(ppd->link_speed_active ==
7227 * tx serdes registers. 7257 QIB_IB_QDR ? qdr_dds :
7228 */ 7258 (ppd->link_speed_active ==
7229 dds = (struct txdds_ent *)(ppd->link_speed_active == QIB_IB_QDR ? 7259 QIB_IB_DDR ? ddr_dds : sdr_dds));
7230 qdr_dds : (ppd->link_speed_active == 7260 write_tx_serdes_param(ppd, dds);
7231 QIB_IB_DDR ? ddr_dds : sdr_dds)); 7261 }
7232 write_tx_serdes_param(ppd, dds);
7233 7262
7234 /* Fill in the remaining entries with the default table values. */ 7263 /* Fill in the remaining entries with the default table values. */
7235 for (idx = 1; idx < ARRAY_SIZE(txdds_sdr); ++idx) { 7264 for (idx = 1; idx < ARRAY_SIZE(txdds_sdr); ++idx) {
@@ -7352,6 +7381,11 @@ static int serdes_7322_init(struct qib_pportdata *ppd)
7352 */ 7381 */
7353 init_txdds_table(ppd, 0); 7382 init_txdds_table(ppd, 0);
7354 7383
7384 /* ensure no tx overrides from earlier driver loads */
7385 qib_write_kreg_port(ppd, krp_tx_deemph_override,
7386 SYM_MASK(IBSD_TX_DEEMPHASIS_OVERRIDE_0,
7387 reset_tx_deemphasis_override));
7388
7355 /* Patch some SerDes defaults to "Better for IB" */ 7389 /* Patch some SerDes defaults to "Better for IB" */
7356 /* Timing Loop Bandwidth: cdr_timing[11:9] = 0 */ 7390 /* Timing Loop Bandwidth: cdr_timing[11:9] = 0 */
7357 ibsd_wr_allchans(ppd, 2, 0, BMASK(11, 9)); 7391 ibsd_wr_allchans(ppd, 2, 0, BMASK(11, 9));
@@ -7421,7 +7455,7 @@ static int serdes_7322_init(struct qib_pportdata *ppd)
7421 QDR_STATIC_ADAPT_DOWN_R1 : QDR_STATIC_ADAPT_DOWN); 7455 QDR_STATIC_ADAPT_DOWN_R1 : QDR_STATIC_ADAPT_DOWN);
7422 ppd->cpspec->qdr_dfe_on = 1; 7456 ppd->cpspec->qdr_dfe_on = 1;
7423 7457
7424 /* (FLoop LOS gate: PPM filter enabled */ 7458 /* FLoop LOS gate: PPM filter enabled */
7425 ibsd_wr_allchans(ppd, 38, 0 << 10, 1 << 10); 7459 ibsd_wr_allchans(ppd, 38, 0 << 10, 1 << 10);
7426 7460
7427 /* rx offset center enabled */ 7461 /* rx offset center enabled */
@@ -7486,68 +7520,39 @@ static void write_tx_serdes_param(struct qib_pportdata *ppd,
7486 SYM_MASK(IBSD_TX_DEEMPHASIS_OVERRIDE_0, txc0_ena) | 7520 SYM_MASK(IBSD_TX_DEEMPHASIS_OVERRIDE_0, txc0_ena) |
7487 SYM_MASK(IBSD_TX_DEEMPHASIS_OVERRIDE_0, txcp1_ena) | 7521 SYM_MASK(IBSD_TX_DEEMPHASIS_OVERRIDE_0, txcp1_ena) |
7488 SYM_MASK(IBSD_TX_DEEMPHASIS_OVERRIDE_0, txcn1_ena)); 7522 SYM_MASK(IBSD_TX_DEEMPHASIS_OVERRIDE_0, txcn1_ena));
7489 deemph |= 1ULL << SYM_LSB(IBSD_TX_DEEMPHASIS_OVERRIDE_0, 7523
7490 tx_override_deemphasis_select); 7524 deemph |= SYM_MASK(IBSD_TX_DEEMPHASIS_OVERRIDE_0,
7491 deemph |= txdds->amp << SYM_LSB(IBSD_TX_DEEMPHASIS_OVERRIDE_0, 7525 tx_override_deemphasis_select);
7492 txampcntl_d2a); 7526 deemph |= (txdds->amp & SYM_RMASK(IBSD_TX_DEEMPHASIS_OVERRIDE_0,
7493 deemph |= txdds->main << SYM_LSB(IBSD_TX_DEEMPHASIS_OVERRIDE_0, 7527 txampcntl_d2a)) << SYM_LSB(IBSD_TX_DEEMPHASIS_OVERRIDE_0,
7494 txc0_ena); 7528 txampcntl_d2a);
7495 deemph |= txdds->post << SYM_LSB(IBSD_TX_DEEMPHASIS_OVERRIDE_0, 7529 deemph |= (txdds->main & SYM_RMASK(IBSD_TX_DEEMPHASIS_OVERRIDE_0,
7496 txcp1_ena); 7530 txc0_ena)) << SYM_LSB(IBSD_TX_DEEMPHASIS_OVERRIDE_0,
7497 deemph |= txdds->pre << SYM_LSB(IBSD_TX_DEEMPHASIS_OVERRIDE_0, 7531 txc0_ena);
7532 deemph |= (txdds->post & SYM_RMASK(IBSD_TX_DEEMPHASIS_OVERRIDE_0,
7533 txcp1_ena)) << SYM_LSB(IBSD_TX_DEEMPHASIS_OVERRIDE_0,
7534 txcp1_ena);
7535 deemph |= (txdds->pre & SYM_RMASK(IBSD_TX_DEEMPHASIS_OVERRIDE_0,
7536 txcn1_ena)) << SYM_LSB(IBSD_TX_DEEMPHASIS_OVERRIDE_0,
7498 txcn1_ena); 7537 txcn1_ena);
7499 qib_write_kreg_port(ppd, krp_tx_deemph_override, deemph); 7538 qib_write_kreg_port(ppd, krp_tx_deemph_override, deemph);
7500} 7539}
7501 7540
7502/* 7541/*
7503 * set per-bay, per channel parameters. For now, we ignore 7542 * Set the parameters for mez cards on link bounce, so they are
7504 * do_tx, and always set tx parameters, and set them with the same value 7543 * always exactly what was requested. Similar logic to init_txdds
7505 * for all channels, using the channel 0 value. We may switch to 7544 * but does just the serdes.
7506 * per-channel settings in the future, and that method only needs
7507 * to be done once.
7508 * Because this also writes the IBC txdds table with a single set
7509 * of values, it should be called only for cases where we want to completely
7510 * force a specific setting, typically only for mez cards.
7511 */ 7545 */
7512static void adj_tx_serdes(struct qib_pportdata *ppd) 7546static void adj_tx_serdes(struct qib_pportdata *ppd)
7513{ 7547{
7514 struct txdds_ent txdds; 7548 const struct txdds_ent *sdr_dds, *ddr_dds, *qdr_dds;
7515 int i; 7549 struct txdds_ent *dds;
7516 u8 *amp, *pre, *mainv, *post;
7517
7518 /*
7519 * Because we use TX_DEEMPHASIS_OVERRIDE, we need to
7520 * always do tx side, just like H1, since it is cleared
7521 * by link down
7522 */
7523 amp = ppd->cpspec->amp;
7524 pre = ppd->cpspec->pre;
7525 mainv = ppd->cpspec->mainv;
7526 post = ppd->cpspec->post;
7527
7528 amp[0] &= SYM_RMASK(IBSD_TX_DEEMPHASIS_OVERRIDE_0,
7529 txampcntl_d2a);
7530 mainv[0] &= SYM_RMASK(IBSD_TX_DEEMPHASIS_OVERRIDE_0,
7531 txc0_ena);
7532 post[0] &= SYM_RMASK(IBSD_TX_DEEMPHASIS_OVERRIDE_0,
7533 txcp1_ena);
7534 pre[0] &= SYM_RMASK(IBSD_TX_DEEMPHASIS_OVERRIDE_0,
7535 txcn1_ena);
7536
7537 /*
7538 * Use the channel zero values, only, for now, for
7539 * all channels
7540 */
7541 txdds.amp = amp[0];
7542 txdds.pre = pre[0];
7543 txdds.main = mainv[0];
7544 txdds.post = post[0];
7545
7546 /* write the QDR table for IBC use, as backup for link down */
7547 for (i = 0; i < ARRAY_SIZE(txdds_qdr); ++i)
7548 set_txdds(ppd, i + 32, &txdds);
7549 7550
7550 write_tx_serdes_param(ppd, &txdds); 7551 find_best_ent(ppd, &sdr_dds, &ddr_dds, &qdr_dds, 1);
7552 dds = (struct txdds_ent *)(ppd->link_speed_active == QIB_IB_QDR ?
7553 qdr_dds : (ppd->link_speed_active == QIB_IB_DDR ?
7554 ddr_dds : sdr_dds));
7555 write_tx_serdes_param(ppd, dds);
7551} 7556}
7552 7557
7553/* set QDR forced value for H1, if needed */ 7558/* set QDR forced value for H1, if needed */
@@ -7567,235 +7572,6 @@ static void force_h1(struct qib_pportdata *ppd)
7567 } 7572 }
7568} 7573}
7569 7574
7570/*
7571 * Parse the parameters for the QMH7342, to get rx and tx serdes
7572 * settings for that Bay, for both possible mez connectors (PCIe bus)
7573 * and IB link (one link on mez1, two possible on mez2).
7574 *
7575 * Data is comma or white space separated.
7576 *
7577 * A set of data has 7 groups, rx and tx groups have SERDES_CHANS values,
7578 * one per IB lane (serdes channel).
7579 * The groups are Bay, bus# H1 rcv, and amp, pre, post, main Tx values (QDR).
7580 * The Bay # is used only for debugging currently.
7581 * H1 values are set whenever the link goes down, or is at cfg_test or
7582 * cfg_wait_enh. Tx values are programmed once, when this routine is called
7583 * (and with default values at chip initialization). Values are any base, in
7584 * strtoul style, and values are seperated by comma, or any white space
7585 * (space, tab, newline).
7586 *
7587 * An example set might look like this (white space vs
7588 * comma used for human ease of reading)
7589 * The ordering is a set of Bay# Bus# H1, amp, pre, post, and main for mez1 IB1,
7590 * repeat for mez2 IB1, then mez2 IB2.
7591 *
7592 * B B H1:0 amp:0 pre:0 post: 0 main:0
7593 * a u H1: 1 amp: 1 pre: 1 post: 1 main: 1
7594 * y s H1: 2 amp: 2 pre: 2 post: 2 main: 2
7595 * H1: 4 amp: 3 pre: 3 post: 3 main: 3
7596 * 1 3 8,6,5,6 0,0,0,0 1,1,1,1 10,10,10,10 3,3,3,3
7597 * 1 6 7,6,6,7 0,0,0,0 1,1,1,1 10,10,10,10 3,3,3,3
7598 * 1 6 9,7,7,8 0,0,0,0 1,1,1,1 10,10,10,10 3,3,3,3
7599 */
7600#define N_QMH_FIELDS 22
7601static int setup_qmh_params(const char *str, struct kernel_param *kp)
7602{
7603 char *abuf, *v, *nv, *nvp;
7604 struct qib_devdata *dd;
7605 struct qib_pportdata *ppd;
7606 u32 mez, vlen, nf, port, bay;
7607 int ret = 0, found = 0;
7608
7609 vlen = strlen(str) + 1;
7610 abuf = kmalloc(vlen, GFP_KERNEL);
7611 if (!abuf) {
7612 printk(KERN_INFO QIB_DRV_NAME
7613 " Unable to allocate QMH param buffer; ignoring\n");
7614 return 0;
7615 }
7616 memcpy(abuf, str, vlen);
7617 v = abuf;
7618
7619 /* these 3 are because gcc can't know they are set before used */
7620 port = 1;
7621 mez = 1; /* used only for debugging */
7622 bay = 0; /* used only for debugging */
7623 ppd = NULL;
7624 for (nf = 0; (nv = strsep(&v, ", \t\n\r")) &&
7625 nf < (N_QMH_FIELDS * 3);) {
7626 u32 val;
7627
7628 if (!*nv)
7629 /* allow for multiple separators */
7630 continue;
7631
7632 val = simple_strtoul(nv, &nvp, 0);
7633 if (nv == nvp) {
7634 printk(KERN_INFO QIB_DRV_NAME
7635 " Bay%u, mez%u IB%u non-numeric value (%s) "
7636 "field #%u, ignoring rest\n", bay, mez,
7637 port, nv, nf % (N_QMH_FIELDS * 3));
7638 ret = -EINVAL;
7639 goto bail;
7640 }
7641 if (!(nf % N_QMH_FIELDS)) {
7642 ppd = NULL;
7643 bay = val;
7644 if (!bay || bay > 16) {
7645 printk(KERN_INFO QIB_DRV_NAME
7646 " Invalid bay # %u, field %u, "
7647 "ignoring rest\n", bay, nf);
7648 ret = -EINVAL;
7649 goto bail;
7650 }
7651 } else if ((nf % N_QMH_FIELDS) == 1) {
7652 u32 bus = val;
7653 if (nf == 1) {
7654 mez = 1;
7655 port = 1;
7656 } else if (nf == (N_QMH_FIELDS + 1)) {
7657 mez = 2;
7658 port = 1;
7659 } else {
7660 mez = 2;
7661 port = 2;
7662 }
7663 list_for_each_entry(dd, &qib_dev_list, list) {
7664 if (dd->deviceid != PCI_DEVICE_ID_QLOGIC_IB_7322
7665 || !IS_QMH(dd))
7666 continue; /* only for QMH cards */
7667 if (dd->pcidev->bus->number == bus) {
7668 found++;
7669 ppd = &dd->pport[port - 1];
7670 }
7671 }
7672 } else if (ppd) {
7673 u32 parm = (nf % N_QMH_FIELDS) - 2;
7674 if (parm < SERDES_CHANS && !(parm % SERDES_CHANS))
7675 ppd->cpspec->h1_val = val;
7676 else if (parm < (2 * SERDES_CHANS))
7677 ppd->cpspec->amp[parm % SERDES_CHANS] = val;
7678 else if (parm < (3 * SERDES_CHANS))
7679 ppd->cpspec->pre[parm % SERDES_CHANS] = val;
7680 else if (parm < (4 * SERDES_CHANS))
7681 ppd->cpspec->post[parm % SERDES_CHANS] = val;
7682 else {
7683 ppd->cpspec->mainv[parm % SERDES_CHANS] = val;
7684 /* At the end of a port, set params */
7685 if (parm == ((5 * SERDES_CHANS) - 1))
7686 adj_tx_serdes(ppd);
7687 }
7688 }
7689 nf++;
7690 }
7691 if (!found) {
7692 printk(KERN_ERR QIB_DRV_NAME
7693 ": No match found for qmh_serdes_setup parameter\n");
7694 ret = -EINVAL;
7695 }
7696bail:
7697 kfree(abuf);
7698 return ret;
7699}
7700
7701/*
7702 * Similarly for QME7342, but the format is simpler, values are the
7703 * same for all mez card positions in a blade (2 or 4 per blade), but
7704 * are different for some blades vs others, and we don't need to
7705 * specify different parameters for different serdes channels or different
7706 * IB ports.
7707 * Format is: h1 amp,pre,post,main
7708 * Alternate format (so ports can be different): Pport# h1 amp,pre,post,main
7709 */
7710#define N_QME_FIELDS 5
7711static int setup_qme_params(const char *str, struct kernel_param *kp)
7712{
7713 char *abuf, *v, *nv, *nvp;
7714 struct qib_devdata *dd;
7715 u32 vlen, nf, port = 0;
7716 u8 h1, tx[4]; /* amp, pre, post, main */
7717 int ret = -EINVAL;
7718 char *seplist;
7719
7720 vlen = strlen(str) + 1;
7721 abuf = kmalloc(vlen, GFP_KERNEL);
7722 if (!abuf) {
7723 printk(KERN_INFO QIB_DRV_NAME
7724 " Unable to allocate QME param buffer; ignoring\n");
7725 return 0;
7726 }
7727 strncpy(abuf, str, vlen);
7728
7729 v = abuf;
7730 seplist = " \t";
7731 h1 = H1_FORCE_QME; /* gcc can't figure out always set before used */
7732
7733 for (nf = 0; (nv = strsep(&v, seplist)); ) {
7734 u32 val;
7735
7736 if (!*nv)
7737 /* allow for multiple separators */
7738 continue;
7739
7740 if (!nf && *nv == 'P') {
7741 /* alternate format with port */
7742 val = simple_strtoul(++nv, &nvp, 0);
7743 if (nv == nvp || port >= NUM_IB_PORTS) {
7744 printk(KERN_INFO QIB_DRV_NAME
7745 " %s: non-numeric port value (%s) "
7746 "ignoring rest\n", __func__, nv);
7747 goto done;
7748 }
7749 port = val;
7750 continue; /* without incrementing nf */
7751 }
7752 val = simple_strtoul(nv, &nvp, 0);
7753 if (nv == nvp) {
7754 printk(KERN_INFO QIB_DRV_NAME
7755 " %s: non-numeric value (%s) "
7756 "field #%u, ignoring rest\n", __func__,
7757 nv, nf);
7758 goto done;
7759 }
7760 if (!nf) {
7761 h1 = val;
7762 seplist = ",";
7763 } else
7764 tx[nf - 1] = val;
7765 if (++nf == N_QME_FIELDS) {
7766 list_for_each_entry(dd, &qib_dev_list, list) {
7767 int pidx, i;
7768 if (dd->deviceid != PCI_DEVICE_ID_QLOGIC_IB_7322
7769 || !IS_QME(dd))
7770 continue; /* only for QME cards */
7771 for (pidx = 0; pidx < dd->num_pports; ++pidx) {
7772 struct qib_pportdata *ppd;
7773 ppd = &dd->pport[pidx];
7774 if ((port && ppd->port != port) ||
7775 !ppd->link_speed_supported)
7776 continue;
7777 ppd->cpspec->h1_val = h1;
7778 for (i = 0; i < SERDES_CHANS; i++) {
7779 ppd->cpspec->amp[i] = tx[0];
7780 ppd->cpspec->pre[i] = tx[1];
7781 ppd->cpspec->post[i] = tx[2];
7782 ppd->cpspec->mainv[i] = tx[3];
7783 }
7784 adj_tx_serdes(ppd);
7785 }
7786 }
7787 ret = 0;
7788 goto done;
7789 }
7790 }
7791 printk(KERN_INFO QIB_DRV_NAME
7792 " %s: Only %u of %u fields provided, skipping\n",
7793 __func__, nf, N_QME_FIELDS);
7794done:
7795 kfree(abuf);
7796 return ret;
7797}
7798
7799#define SJA_EN SYM_MASK(SPC_JTAG_ACCESS_REG, SPC_JTAG_ACCESS_EN) 7575#define SJA_EN SYM_MASK(SPC_JTAG_ACCESS_REG, SPC_JTAG_ACCESS_EN)
7800#define BISTEN_LSB SYM_LSB(SPC_JTAG_ACCESS_REG, bist_en) 7576#define BISTEN_LSB SYM_LSB(SPC_JTAG_ACCESS_REG, bist_en)
7801 7577
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-21 12:28:26 -0500