[PATCH net-next v2] cxgb4: collect hardware queue descriptors

[Rahul Lakkireddy <rahul.lakkireddy@chelsio.com>]

Collect descriptors of all ULD and LLD hardware queues managed
by LLD.

Signed-off-by: Rahul Lakkireddy <rahul.lakkireddy@chelsio.com>
Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com>
---
v2:
- Move inline functions to header file.
- Add missing undefine for QDESC_GET_* macros.

 drivers/net/ethernet/chelsio/cxgb4/cudbg_entity.h |  42 ++++
 drivers/net/ethernet/chelsio/cxgb4/cudbg_if.h     |   3 +-
 drivers/net/ethernet/chelsio/cxgb4/cudbg_lib.c    | 238 ++++++++++++++++++++++
 drivers/net/ethernet/chelsio/cxgb4/cudbg_lib.h    | 106 ++++++++++
 drivers/net/ethernet/chelsio/cxgb4/cxgb4.h        |   7 +
 drivers/net/ethernet/chelsio/cxgb4/cxgb4_cudbg.c  |   4 +
 6 files changed, 399 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/chelsio/cxgb4/cudbg_entity.h b/drivers/net/ethernet/chelsio/cxgb4/cudbg_entity.h
index 36d25883d123..b2d617abcf49 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cudbg_entity.h
+++ b/drivers/net/ethernet/chelsio/cxgb4/cudbg_entity.h
@@ -315,6 +315,48 @@ struct cudbg_pbt_tables {
 	u32 pbt_data[CUDBG_PBT_DATA_ENTRIES];
 };
 
+enum cudbg_qdesc_qtype {
+	CUDBG_QTYPE_UNKNOWN = 0,
+	CUDBG_QTYPE_NIC_TXQ,
+	CUDBG_QTYPE_NIC_RXQ,
+	CUDBG_QTYPE_NIC_FLQ,
+	CUDBG_QTYPE_CTRLQ,
+	CUDBG_QTYPE_FWEVTQ,
+	CUDBG_QTYPE_INTRQ,
+	CUDBG_QTYPE_PTP_TXQ,
+	CUDBG_QTYPE_OFLD_TXQ,
+	CUDBG_QTYPE_RDMA_RXQ,
+	CUDBG_QTYPE_RDMA_FLQ,
+	CUDBG_QTYPE_RDMA_CIQ,
+	CUDBG_QTYPE_ISCSI_RXQ,
+	CUDBG_QTYPE_ISCSI_FLQ,
+	CUDBG_QTYPE_ISCSIT_RXQ,
+	CUDBG_QTYPE_ISCSIT_FLQ,
+	CUDBG_QTYPE_CRYPTO_TXQ,
+	CUDBG_QTYPE_CRYPTO_RXQ,
+	CUDBG_QTYPE_CRYPTO_FLQ,
+	CUDBG_QTYPE_TLS_RXQ,
+	CUDBG_QTYPE_TLS_FLQ,
+	CUDBG_QTYPE_MAX,
+};
+
+#define CUDBG_QDESC_REV 1
+
+struct cudbg_qdesc_entry {
+	u32 data_size;
+	u32 qtype;
+	u32 qid;
+	u32 desc_size;
+	u32 num_desc;
+	u8 data[0]; /* Must be last */
+};
+
+struct cudbg_qdesc_info {
+	u32 qdesc_entry_size;
+	u32 num_queues;
+	u8 data[0]; /* Must be last */
+};
+
 #define IREG_NUM_ELEM 4
 
 static const u32 t6_tp_pio_array[][IREG_NUM_ELEM] = {
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cudbg_if.h b/drivers/net/ethernet/chelsio/cxgb4/cudbg_if.h
index 215fe6260fd7..dec63c15c0ba 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cudbg_if.h
+++ b/drivers/net/ethernet/chelsio/cxgb4/cudbg_if.h
@@ -81,7 +81,8 @@ enum cudbg_dbg_entity_type {
 	CUDBG_MBOX_LOG = 66,
 	CUDBG_HMA_INDIRECT = 67,
 	CUDBG_HMA = 68,
-	CUDBG_MAX_ENTITY = 70,
+	CUDBG_QDESC = 70,
+	CUDBG_MAX_ENTITY = 71,
 };
 
 struct cudbg_init {
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cudbg_lib.c b/drivers/net/ethernet/chelsio/cxgb4/cudbg_lib.c
index d97e0d7e541a..7c49681407ad 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cudbg_lib.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cudbg_lib.c
@@ -19,6 +19,7 @@
 
 #include "t4_regs.h"
 #include "cxgb4.h"
+#include "cxgb4_cudbg.h"
 #include "cudbg_if.h"
 #include "cudbg_lib_common.h"
 #include "cudbg_entity.h"
@@ -2890,3 +2891,240 @@ int cudbg_collect_hma_indirect(struct cudbg_init *pdbg_init,
 	}
 	return cudbg_write_and_release_buff(pdbg_init, &temp_buff, dbg_buff);
 }
+
+void cudbg_fill_qdesc_num_and_size(const struct adapter *padap,
+				   u32 *num, u32 *size)
+{
+	u32 tot_entries = 0, tot_size = 0;
+
+	/* NIC TXQ, RXQ, FLQ, and CTRLQ */
+	tot_entries += MAX_ETH_QSETS * 3;
+	tot_entries += MAX_CTRL_QUEUES;
+
+	tot_size += MAX_ETH_QSETS * MAX_TXQ_ENTRIES * MAX_TXQ_DESC_SIZE;
+	tot_size += MAX_ETH_QSETS * MAX_RSPQ_ENTRIES * MAX_RXQ_DESC_SIZE;
+	tot_size += MAX_ETH_QSETS * MAX_RX_BUFFERS * MAX_FL_DESC_SIZE;
+	tot_size += MAX_CTRL_QUEUES * MAX_CTRL_TXQ_ENTRIES *
+		    MAX_CTRL_TXQ_DESC_SIZE;
+
+	/* FW_EVTQ and INTRQ */
+	tot_entries += INGQ_EXTRAS;
+	tot_size += INGQ_EXTRAS * MAX_RSPQ_ENTRIES * MAX_RXQ_DESC_SIZE;
+
+	/* PTP_TXQ */
+	tot_entries += 1;
+	tot_size += MAX_TXQ_ENTRIES * MAX_TXQ_DESC_SIZE;
+
+	/* ULD TXQ, RXQ, and FLQ */
+	tot_entries += CXGB4_TX_MAX * MAX_OFLD_QSETS;
+	tot_entries += CXGB4_ULD_MAX * MAX_ULD_QSETS * 2;
+
+	tot_size += CXGB4_TX_MAX * MAX_OFLD_QSETS * MAX_TXQ_ENTRIES *
+		    MAX_TXQ_DESC_SIZE;
+	tot_size += CXGB4_ULD_MAX * MAX_ULD_QSETS * MAX_RSPQ_ENTRIES *
+		    MAX_RXQ_DESC_SIZE;
+	tot_size += CXGB4_ULD_MAX * MAX_ULD_QSETS * MAX_RX_BUFFERS *
+		    MAX_FL_DESC_SIZE;
+
+	/* ULD CIQ */
+	tot_entries += CXGB4_ULD_MAX * MAX_ULD_QSETS;
+	tot_size += CXGB4_ULD_MAX * MAX_ULD_QSETS * SGE_MAX_IQ_SIZE *
+		    MAX_RXQ_DESC_SIZE;
+
+	tot_size += sizeof(struct cudbg_ver_hdr) +
+		    sizeof(struct cudbg_qdesc_info) +
+		    sizeof(struct cudbg_qdesc_entry) * tot_entries;
+
+	if (num)
+		*num = tot_entries;
+
+	if (size)
+		*size = tot_size;
+}
+
+int cudbg_collect_qdesc(struct cudbg_init *pdbg_init,
+			struct cudbg_buffer *dbg_buff,
+			struct cudbg_error *cudbg_err)
+{
+	u32 num_queues = 0, tot_entries = 0, size = 0;
+	struct adapter *padap = pdbg_init->adap;
+	struct cudbg_buffer temp_buff = { 0 };
+	struct cudbg_qdesc_entry *qdesc_entry;
+	struct cudbg_qdesc_info *qdesc_info;
+	struct cudbg_ver_hdr *ver_hdr;
+	struct sge *s = &padap->sge;
+	u32 i, j, cur_off, tot_len;
+	u8 *data;
+	int rc;
+
+	cudbg_fill_qdesc_num_and_size(padap, &tot_entries, &size);
+	size = min_t(u32, size, CUDBG_DUMP_BUFF_SIZE);
+	tot_len = size;
+	data = kvzalloc(size, GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
+	ver_hdr = (struct cudbg_ver_hdr *)data;
+	ver_hdr->signature = CUDBG_ENTITY_SIGNATURE;
+	ver_hdr->revision = CUDBG_QDESC_REV;
+	ver_hdr->size = sizeof(struct cudbg_qdesc_info);
+	size -= sizeof(*ver_hdr);
+
+	qdesc_info = (struct cudbg_qdesc_info *)(data +
+						 sizeof(*ver_hdr));
+	size -= sizeof(*qdesc_info);
+	qdesc_entry = (struct cudbg_qdesc_entry *)qdesc_info->data;
+
+#define QDESC_GET(q, desc, type, label) do { \
+	if (size <= 0) { \
+		goto label; \
+	} \
+	if (desc) { \
+		cudbg_fill_qdesc_##q(q, type, qdesc_entry); \
+		size -= sizeof(*qdesc_entry) + qdesc_entry->data_size; \
+		num_queues++; \
+		qdesc_entry = cudbg_next_qdesc(qdesc_entry); \
+	} \
+} while (0)
+
+#define QDESC_GET_TXQ(q, type, label) do { \
+	struct sge_txq *txq = (struct sge_txq *)q; \
+	QDESC_GET(txq, txq->desc, type, label); \
+} while (0)
+
+#define QDESC_GET_RXQ(q, type, label) do { \
+	struct sge_rspq *rxq = (struct sge_rspq *)q; \
+	QDESC_GET(rxq, rxq->desc, type, label); \
+} while (0)
+
+#define QDESC_GET_FLQ(q, type, label) do { \
+	struct sge_fl *flq = (struct sge_fl *)q; \
+	QDESC_GET(flq, flq->desc, type, label); \
+} while (0)
+
+	/* NIC TXQ */
+	for (i = 0; i < s->ethqsets; i++)
+		QDESC_GET_TXQ(&s->ethtxq[i].q, CUDBG_QTYPE_NIC_TXQ, out);
+
+	/* NIC RXQ */
+	for (i = 0; i < s->ethqsets; i++)
+		QDESC_GET_RXQ(&s->ethrxq[i].rspq, CUDBG_QTYPE_NIC_RXQ, out);
+
+	/* NIC FLQ */
+	for (i = 0; i < s->ethqsets; i++)
+		QDESC_GET_FLQ(&s->ethrxq[i].fl, CUDBG_QTYPE_NIC_FLQ, out);
+
+	/* NIC CTRLQ */
+	for (i = 0; i < padap->params.nports; i++)
+		QDESC_GET_TXQ(&s->ctrlq[i].q, CUDBG_QTYPE_CTRLQ, out);
+
+	/* FW_EVTQ */
+	QDESC_GET_RXQ(&s->fw_evtq, CUDBG_QTYPE_FWEVTQ, out);
+
+	/* INTRQ */
+	QDESC_GET_RXQ(&s->intrq, CUDBG_QTYPE_INTRQ, out);
+
+	/* PTP_TXQ */
+	QDESC_GET_TXQ(&s->ptptxq.q, CUDBG_QTYPE_PTP_TXQ, out);
+
+	/* ULD Queues */
+	mutex_lock(&uld_mutex);
+
+	if (s->uld_txq_info) {
+		struct sge_uld_txq_info *utxq;
+
+		/* ULD TXQ */
+		for (j = 0; j < CXGB4_TX_MAX; j++) {
+			if (!s->uld_txq_info[j])
+				continue;
+
+			utxq = s->uld_txq_info[j];
+			for (i = 0; i < utxq->ntxq; i++)
+				QDESC_GET_TXQ(&utxq->uldtxq[i].q,
+					      cudbg_uld_txq_to_qtype(j),
+					      out_unlock);
+		}
+	}
+
+	if (s->uld_rxq_info) {
+		struct sge_uld_rxq_info *urxq;
+		u32 base;
+
+		/* ULD RXQ */
+		for (j = 0; j < CXGB4_ULD_MAX; j++) {
+			if (!s->uld_rxq_info[j])
+				continue;
+
+			urxq = s->uld_rxq_info[j];
+			for (i = 0; i < urxq->nrxq; i++)
+				QDESC_GET_RXQ(&urxq->uldrxq[i].rspq,
+					      cudbg_uld_rxq_to_qtype(j),
+					      out_unlock);
+		}
+
+		/* ULD FLQ */
+		for (j = 0; j < CXGB4_ULD_MAX; j++) {
+			if (!s->uld_rxq_info[j])
+				continue;
+
+			urxq = s->uld_rxq_info[j];
+			for (i = 0; i < urxq->nrxq; i++)
+				QDESC_GET_FLQ(&urxq->uldrxq[i].fl,
+					      cudbg_uld_flq_to_qtype(j),
+					      out_unlock);
+		}
+
+		/* ULD CIQ */
+		for (j = 0; j < CXGB4_ULD_MAX; j++) {
+			if (!s->uld_rxq_info[j])
+				continue;
+
+			urxq = s->uld_rxq_info[j];
+			base = urxq->nrxq;
+			for (i = 0; i < urxq->nciq; i++)
+				QDESC_GET_RXQ(&urxq->uldrxq[base + i].rspq,
+					      cudbg_uld_ciq_to_qtype(j),
+					      out_unlock);
+		}
+	}
+
+out_unlock:
+	mutex_unlock(&uld_mutex);
+
+out:
+	qdesc_info->qdesc_entry_size = sizeof(*qdesc_entry);
+	qdesc_info->num_queues = num_queues;
+	cur_off = 0;
+	while (tot_len) {
+		u32 chunk_size = min_t(u32, tot_len, CUDBG_CHUNK_SIZE);
+
+		rc = cudbg_get_buff(pdbg_init, dbg_buff, chunk_size,
+				    &temp_buff);
+		if (rc) {
+			cudbg_err->sys_warn = CUDBG_STATUS_PARTIAL_DATA;
+			goto out_free;
+		}
+
+		memcpy(temp_buff.data, data + cur_off, chunk_size);
+		tot_len -= chunk_size;
+		cur_off += chunk_size;
+		rc = cudbg_write_and_release_buff(pdbg_init, &temp_buff,
+						  dbg_buff);
+		if (rc) {
+			cudbg_put_buff(pdbg_init, &temp_buff);
+			cudbg_err->sys_warn = CUDBG_STATUS_PARTIAL_DATA;
+			goto out_free;
+		}
+	}
+
+out_free:
+	if (data)
+		kvfree(data);
+
+#undef QDESC_GET_FLQ
+#undef QDESC_GET_RXQ
+#undef QDESC_GET_TXQ
+#undef QDESC_GET
+
+	return rc;
+}
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cudbg_lib.h b/drivers/net/ethernet/chelsio/cxgb4/cudbg_lib.h
index eebefe7cd18e..f047a01a3e5b 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cudbg_lib.h
+++ b/drivers/net/ethernet/chelsio/cxgb4/cudbg_lib.h
@@ -171,6 +171,9 @@ int cudbg_collect_hma_indirect(struct cudbg_init *pdbg_init,
 int cudbg_collect_hma_meminfo(struct cudbg_init *pdbg_init,
 			      struct cudbg_buffer *dbg_buff,
 			      struct cudbg_error *cudbg_err);
+int cudbg_collect_qdesc(struct cudbg_init *pdbg_init,
+			struct cudbg_buffer *dbg_buff,
+			struct cudbg_error *cudbg_err);
 
 struct cudbg_entity_hdr *cudbg_get_entity_hdr(void *outbuf, int i);
 void cudbg_align_debug_buffer(struct cudbg_buffer *dbg_buff,
@@ -182,4 +185,107 @@ int cudbg_fill_meminfo(struct adapter *padap,
 		       struct cudbg_meminfo *meminfo_buff);
 void cudbg_fill_le_tcam_info(struct adapter *padap,
 			     struct cudbg_tcam *tcam_region);
+void cudbg_fill_qdesc_num_and_size(const struct adapter *padap,
+				   u32 *num, u32 *size);
+
+static inline u32 cudbg_uld_txq_to_qtype(u32 uld)
+{
+	switch (uld) {
+	case CXGB4_TX_OFLD:
+		return CUDBG_QTYPE_OFLD_TXQ;
+	case CXGB4_TX_CRYPTO:
+		return CUDBG_QTYPE_CRYPTO_TXQ;
+	}
+
+	return CUDBG_QTYPE_UNKNOWN;
+}
+
+static inline u32 cudbg_uld_rxq_to_qtype(u32 uld)
+{
+	switch (uld) {
+	case CXGB4_ULD_RDMA:
+		return CUDBG_QTYPE_RDMA_RXQ;
+	case CXGB4_ULD_ISCSI:
+		return CUDBG_QTYPE_ISCSI_RXQ;
+	case CXGB4_ULD_ISCSIT:
+		return CUDBG_QTYPE_ISCSIT_RXQ;
+	case CXGB4_ULD_CRYPTO:
+		return CUDBG_QTYPE_CRYPTO_RXQ;
+	case CXGB4_ULD_TLS:
+		return CUDBG_QTYPE_TLS_RXQ;
+	}
+
+	return CUDBG_QTYPE_UNKNOWN;
+}
+
+static inline u32 cudbg_uld_flq_to_qtype(u32 uld)
+{
+	switch (uld) {
+	case CXGB4_ULD_RDMA:
+		return CUDBG_QTYPE_RDMA_FLQ;
+	case CXGB4_ULD_ISCSI:
+		return CUDBG_QTYPE_ISCSI_FLQ;
+	case CXGB4_ULD_ISCSIT:
+		return CUDBG_QTYPE_ISCSIT_FLQ;
+	case CXGB4_ULD_CRYPTO:
+		return CUDBG_QTYPE_CRYPTO_FLQ;
+	case CXGB4_ULD_TLS:
+		return CUDBG_QTYPE_TLS_FLQ;
+	}
+
+	return CUDBG_QTYPE_UNKNOWN;
+}
+
+static inline u32 cudbg_uld_ciq_to_qtype(u32 uld)
+{
+	switch (uld) {
+	case CXGB4_ULD_RDMA:
+		return CUDBG_QTYPE_RDMA_CIQ;
+	}
+
+	return CUDBG_QTYPE_UNKNOWN;
+}
+
+static inline void cudbg_fill_qdesc_txq(const struct sge_txq *txq,
+					enum cudbg_qdesc_qtype type,
+					struct cudbg_qdesc_entry *entry)
+{
+	entry->qtype = type;
+	entry->qid = txq->cntxt_id;
+	entry->desc_size = sizeof(struct tx_desc);
+	entry->num_desc = txq->size;
+	entry->data_size = txq->size * sizeof(struct tx_desc);
+	memcpy(entry->data, txq->desc, entry->data_size);
+}
+
+static inline void cudbg_fill_qdesc_rxq(const struct sge_rspq *rxq,
+					enum cudbg_qdesc_qtype type,
+					struct cudbg_qdesc_entry *entry)
+{
+	entry->qtype = type;
+	entry->qid = rxq->cntxt_id;
+	entry->desc_size = rxq->iqe_len;
+	entry->num_desc = rxq->size;
+	entry->data_size = rxq->size * rxq->iqe_len;
+	memcpy(entry->data, rxq->desc, entry->data_size);
+}
+
+static inline void cudbg_fill_qdesc_flq(const struct sge_fl *flq,
+					enum cudbg_qdesc_qtype type,
+					struct cudbg_qdesc_entry *entry)
+{
+	entry->qtype = type;
+	entry->qid = flq->cntxt_id;
+	entry->desc_size = sizeof(__be64);
+	entry->num_desc = flq->size;
+	entry->data_size = flq->size * sizeof(__be64);
+	memcpy(entry->data, flq->desc, entry->data_size);
+}
+
+static inline
+struct cudbg_qdesc_entry *cudbg_next_qdesc(struct cudbg_qdesc_entry *e)
+{
+	return (struct cudbg_qdesc_entry *)
+	       ((u8 *)e + sizeof(*e) + e->data_size);
+}
 #endif /* __CUDBG_LIB_H__ */
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h b/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h
index 76d16747f513..298701edb638 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h
@@ -532,6 +532,13 @@ enum {
 	MIN_FL_ENTRIES       = 16
 };
 
+enum {
+	MAX_TXQ_DESC_SIZE      = 64,
+	MAX_RXQ_DESC_SIZE      = 128,
+	MAX_FL_DESC_SIZE       = 8,
+	MAX_CTRL_TXQ_DESC_SIZE = 64,
+};
+
 enum {
 	INGQ_EXTRAS = 2,        /* firmware event queue and */
 				/*   forwarded interrupts */
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_cudbg.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_cudbg.c
index 5f01c0a7fd98..972f0a124714 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_cudbg.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_cudbg.c
@@ -30,6 +30,7 @@ static const struct cxgb4_collect_entity cxgb4_collect_mem_dump[] = {
 
 static const struct cxgb4_collect_entity cxgb4_collect_hw_dump[] = {
 	{ CUDBG_MBOX_LOG, cudbg_collect_mbox_log },
+	{ CUDBG_QDESC, cudbg_collect_qdesc },
 	{ CUDBG_DEV_LOG, cudbg_collect_fw_devlog },
 	{ CUDBG_REG_DUMP, cudbg_collect_reg_dump },
 	{ CUDBG_CIM_LA, cudbg_collect_cim_la },
@@ -311,6 +312,9 @@ static u32 cxgb4_get_entity_length(struct adapter *adap, u32 entity)
 		}
 		len = cudbg_mbytes_to_bytes(len);
 		break;
+	case CUDBG_QDESC:
+		cudbg_fill_qdesc_num_and_size(adap, NULL, &len);
+		break;
 	default:
 		break;
 	}
-- 
2.14.1