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cxgb4: Add support for mps_tcam debugfs
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Debug log to get the MPS TCAM table

Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Hariprasad Shenai authored and David S. Miller committed Jan 9, 2015
1 parent 74b3092 commit ef82f66
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131 changes: 131 additions & 0 deletions drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c
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Original file line number Diff line number Diff line change
Expand Up @@ -433,6 +433,136 @@ static const struct file_operations devlog_fops = {
.release = seq_release_private
};

static inline void tcamxy2valmask(u64 x, u64 y, u8 *addr, u64 *mask)
{
*mask = x | y;
y = (__force u64)cpu_to_be64(y);
memcpy(addr, (char *)&y + 2, ETH_ALEN);
}

static int mps_tcam_show(struct seq_file *seq, void *v)
{
if (v == SEQ_START_TOKEN)
seq_puts(seq, "Idx Ethernet address Mask Vld Ports PF"
" VF Replication "
"P0 P1 P2 P3 ML\n");
else {
u64 mask;
u8 addr[ETH_ALEN];
struct adapter *adap = seq->private;
unsigned int idx = (uintptr_t)v - 2;
u64 tcamy = t4_read_reg64(adap, MPS_CLS_TCAM_Y_L(idx));
u64 tcamx = t4_read_reg64(adap, MPS_CLS_TCAM_X_L(idx));
u32 cls_lo = t4_read_reg(adap, MPS_CLS_SRAM_L(idx));
u32 cls_hi = t4_read_reg(adap, MPS_CLS_SRAM_H(idx));
u32 rplc[4] = {0, 0, 0, 0};

if (tcamx & tcamy) {
seq_printf(seq, "%3u -\n", idx);
goto out;
}

if (cls_lo & REPLICATE_F) {
struct fw_ldst_cmd ldst_cmd;
int ret;

memset(&ldst_cmd, 0, sizeof(ldst_cmd));
ldst_cmd.op_to_addrspace =
htonl(FW_CMD_OP_V(FW_LDST_CMD) |
FW_CMD_REQUEST_F |
FW_CMD_READ_F |
FW_LDST_CMD_ADDRSPACE_V(
FW_LDST_ADDRSPC_MPS));
ldst_cmd.cycles_to_len16 = htonl(FW_LEN16(ldst_cmd));
ldst_cmd.u.mps.fid_ctl =
htons(FW_LDST_CMD_FID_V(FW_LDST_MPS_RPLC) |
FW_LDST_CMD_CTL_V(idx));
ret = t4_wr_mbox(adap, adap->mbox, &ldst_cmd,
sizeof(ldst_cmd), &ldst_cmd);
if (ret)
dev_warn(adap->pdev_dev, "Can't read MPS "
"replication map for idx %d: %d\n",
idx, -ret);
else {
rplc[0] = ntohl(ldst_cmd.u.mps.rplc31_0);
rplc[1] = ntohl(ldst_cmd.u.mps.rplc63_32);
rplc[2] = ntohl(ldst_cmd.u.mps.rplc95_64);
rplc[3] = ntohl(ldst_cmd.u.mps.rplc127_96);
}
}

tcamxy2valmask(tcamx, tcamy, addr, &mask);
seq_printf(seq, "%3u %02x:%02x:%02x:%02x:%02x:%02x %012llx"
"%3c %#x%4u%4d",
idx, addr[0], addr[1], addr[2], addr[3], addr[4],
addr[5], (unsigned long long)mask,
(cls_lo & SRAM_VLD_F) ? 'Y' : 'N', PORTMAP_G(cls_hi),
PF_G(cls_lo),
(cls_lo & VF_VALID_F) ? VF_G(cls_lo) : -1);
if (cls_lo & REPLICATE_F)
seq_printf(seq, " %08x %08x %08x %08x",
rplc[3], rplc[2], rplc[1], rplc[0]);
else
seq_printf(seq, "%36c", ' ');
seq_printf(seq, "%4u%3u%3u%3u %#x\n",
SRAM_PRIO0_G(cls_lo), SRAM_PRIO1_G(cls_lo),
SRAM_PRIO2_G(cls_lo), SRAM_PRIO3_G(cls_lo),
(cls_lo >> MULTILISTEN0_S) & 0xf);
}
out: return 0;
}

static inline void *mps_tcam_get_idx(struct seq_file *seq, loff_t pos)
{
struct adapter *adap = seq->private;
int max_mac_addr = is_t4(adap->params.chip) ?
NUM_MPS_CLS_SRAM_L_INSTANCES :
NUM_MPS_T5_CLS_SRAM_L_INSTANCES;
return ((pos <= max_mac_addr) ? (void *)(uintptr_t)(pos + 1) : NULL);
}

static void *mps_tcam_start(struct seq_file *seq, loff_t *pos)
{
return *pos ? mps_tcam_get_idx(seq, *pos) : SEQ_START_TOKEN;
}

static void *mps_tcam_next(struct seq_file *seq, void *v, loff_t *pos)
{
++*pos;
return mps_tcam_get_idx(seq, *pos);
}

static void mps_tcam_stop(struct seq_file *seq, void *v)
{
}

static const struct seq_operations mps_tcam_seq_ops = {
.start = mps_tcam_start,
.next = mps_tcam_next,
.stop = mps_tcam_stop,
.show = mps_tcam_show
};

static int mps_tcam_open(struct inode *inode, struct file *file)
{
int res = seq_open(file, &mps_tcam_seq_ops);

if (!res) {
struct seq_file *seq = file->private_data;

seq->private = inode->i_private;
}
return res;
}

static const struct file_operations mps_tcam_debugfs_fops = {
.owner = THIS_MODULE,
.open = mps_tcam_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release,
};

static ssize_t mem_read(struct file *file, char __user *buf, size_t count,
loff_t *ppos)
{
Expand Down Expand Up @@ -515,6 +645,7 @@ int t4_setup_debugfs(struct adapter *adap)
{ "cim_qcfg", &cim_qcfg_fops, S_IRUSR, 0 },
{ "devlog", &devlog_fops, S_IRUSR, 0 },
{ "l2t", &t4_l2t_fops, S_IRUSR, 0},
{ "mps_tcam", &mps_tcam_debugfs_fops, S_IRUSR, 0 },
};

add_debugfs_files(adap,
Expand Down
60 changes: 60 additions & 0 deletions drivers/net/ethernet/chelsio/cxgb4/t4_regs.h
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Original file line number Diff line number Diff line change
Expand Up @@ -1708,6 +1708,66 @@

#define MPS_RX_PERR_INT_CAUSE_A 0x11074

#define MPS_CLS_TCAM_Y_L_A 0xf000
#define MPS_CLS_TCAM_X_L_A 0xf008

#define MPS_CLS_TCAM_Y_L(idx) (MPS_CLS_TCAM_Y_L_A + (idx) * 16)
#define NUM_MPS_CLS_TCAM_Y_L_INSTANCES 512

#define MPS_CLS_TCAM_X_L(idx) (MPS_CLS_TCAM_X_L_A + (idx) * 16)
#define NUM_MPS_CLS_TCAM_X_L_INSTANCES 512

#define MPS_CLS_SRAM_L_A 0xe000
#define MPS_CLS_SRAM_H_A 0xe004

#define MPS_CLS_SRAM_L(idx) (MPS_CLS_SRAM_L_A + (idx) * 8)
#define NUM_MPS_CLS_SRAM_L_INSTANCES 336

#define MPS_CLS_SRAM_H(idx) (MPS_CLS_SRAM_H_A + (idx) * 8)
#define NUM_MPS_CLS_SRAM_H_INSTANCES 336

#define MULTILISTEN0_S 25

#define REPLICATE_S 11
#define REPLICATE_V(x) ((x) << REPLICATE_S)
#define REPLICATE_F REPLICATE_V(1U)

#define PF_S 8
#define PF_M 0x7U
#define PF_G(x) (((x) >> PF_S) & PF_M)

#define VF_VALID_S 7
#define VF_VALID_V(x) ((x) << VF_VALID_S)
#define VF_VALID_F VF_VALID_V(1U)

#define VF_S 0
#define VF_M 0x7fU
#define VF_G(x) (((x) >> VF_S) & VF_M)

#define SRAM_PRIO3_S 22
#define SRAM_PRIO3_M 0x7U
#define SRAM_PRIO3_G(x) (((x) >> SRAM_PRIO3_S) & SRAM_PRIO3_M)

#define SRAM_PRIO2_S 19
#define SRAM_PRIO2_M 0x7U
#define SRAM_PRIO2_G(x) (((x) >> SRAM_PRIO2_S) & SRAM_PRIO2_M)

#define SRAM_PRIO1_S 16
#define SRAM_PRIO1_M 0x7U
#define SRAM_PRIO1_G(x) (((x) >> SRAM_PRIO1_S) & SRAM_PRIO1_M)

#define SRAM_PRIO0_S 13
#define SRAM_PRIO0_M 0x7U
#define SRAM_PRIO0_G(x) (((x) >> SRAM_PRIO0_S) & SRAM_PRIO0_M)

#define SRAM_VLD_S 12
#define SRAM_VLD_V(x) ((x) << SRAM_VLD_S)
#define SRAM_VLD_F SRAM_VLD_V(1U)

#define PORTMAP_S 0
#define PORTMAP_M 0xfU
#define PORTMAP_G(x) (((x) >> PORTMAP_S) & PORTMAP_M)

#define CPL_INTR_CAUSE_A 0x19054

#define CIM_OP_MAP_PERR_S 5
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