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Merge branch 'for-next-merge' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 

Pull more SCSI target updates from Nicholas Bellinger:
 "This series contains cxgb4 driver prerequisites for supporting iscsi
  segmentation offload (ISO), that will be utilized for a number of
  future v4.7 developments in iscsi-target for supporting generic hw
  offloads"

* 'for-next-merge' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending:
  cxgb4: update Kconfig and Makefile
  cxgb4: add iSCSI DDP page pod manager
  cxgb4, iw_cxgb4: move delayed ack macro definitions
  cxgb4: move VLAN_NONE macro definition
  cxgb4: update struct cxgb4_lld_info definition
  cxgb4: add definitions for iSCSI target ULD
  cxgb4, cxgb4i: move struct cpl_rx_data_ddp definition
  cxgb4, iw_cxgb4, cxgb4i: remove duplicate definitions
  cxgb4, iw_cxgb4: move definitions to common header file
  cxgb4: large receive offload support
  cxgb4: allocate resources for CXGB4_ULD_ISCSIT
  cxgb4: add new ULD type CXGB4_ULD_ISCSIT
This commit is contained in:
Linus Torvalds 2016-03-23 15:57:39 -07:00
Родитель c130423620 2994a75183
Коммит ed7d6bc23b
15 изменённых файлов: 1174 добавлений и 139 удалений
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99
drivers/infiniband/hw/cxgb4/t4fw_ri_api.h
Просмотреть файл

@ -753,103 +753,4 @@ struct fw_ri_wr {
#define FW_RI_WR_P2PTYPE_G(x) \
(((x) >> FW_RI_WR_P2PTYPE_S) & FW_RI_WR_P2PTYPE_M)
struct tcp_options {
__be16 mss;
__u8 wsf;
#if defined(__LITTLE_ENDIAN_BITFIELD)
__u8:4;
__u8 unknown:1;
__u8:1;
__u8 sack:1;
__u8 tstamp:1;
#else
__u8 tstamp:1;
__u8 sack:1;
__u8:1;
__u8 unknown:1;
__u8:4;
#endif
};
struct cpl_pass_accept_req {
union opcode_tid ot;
__be16 rsvd;
__be16 len;
__be32 hdr_len;
__be16 vlan;
__be16 l2info;
__be32 tos_stid;
struct tcp_options tcpopt;
};
/* cpl_pass_accept_req.hdr_len fields */
#define SYN_RX_CHAN_S 0
#define SYN_RX_CHAN_M 0xF
#define SYN_RX_CHAN_V(x) ((x) << SYN_RX_CHAN_S)
#define SYN_RX_CHAN_G(x) (((x) >> SYN_RX_CHAN_S) & SYN_RX_CHAN_M)
#define TCP_HDR_LEN_S 10
#define TCP_HDR_LEN_M 0x3F
#define TCP_HDR_LEN_V(x) ((x) << TCP_HDR_LEN_S)
#define TCP_HDR_LEN_G(x) (((x) >> TCP_HDR_LEN_S) & TCP_HDR_LEN_M)
#define IP_HDR_LEN_S 16
#define IP_HDR_LEN_M 0x3FF
#define IP_HDR_LEN_V(x) ((x) << IP_HDR_LEN_S)
#define IP_HDR_LEN_G(x) (((x) >> IP_HDR_LEN_S) & IP_HDR_LEN_M)
#define ETH_HDR_LEN_S 26
#define ETH_HDR_LEN_M 0x1F
#define ETH_HDR_LEN_V(x) ((x) << ETH_HDR_LEN_S)
#define ETH_HDR_LEN_G(x) (((x) >> ETH_HDR_LEN_S) & ETH_HDR_LEN_M)
/* cpl_pass_accept_req.l2info fields */
#define SYN_MAC_IDX_S 0
#define SYN_MAC_IDX_M 0x1FF
#define SYN_MAC_IDX_V(x) ((x) << SYN_MAC_IDX_S)
#define SYN_MAC_IDX_G(x) (((x) >> SYN_MAC_IDX_S) & SYN_MAC_IDX_M)
#define SYN_XACT_MATCH_S 9
#define SYN_XACT_MATCH_V(x) ((x) << SYN_XACT_MATCH_S)
#define SYN_XACT_MATCH_F SYN_XACT_MATCH_V(1U)
#define SYN_INTF_S 12
#define SYN_INTF_M 0xF
#define SYN_INTF_V(x) ((x) << SYN_INTF_S)
#define SYN_INTF_G(x) (((x) >> SYN_INTF_S) & SYN_INTF_M)
struct ulptx_idata {
__be32 cmd_more;
__be32 len;
};
#define ULPTX_NSGE_S 0
#define ULPTX_NSGE_M 0xFFFF
#define ULPTX_NSGE_V(x) ((x) << ULPTX_NSGE_S)
#define RX_DACK_MODE_S 29
#define RX_DACK_MODE_M 0x3
#define RX_DACK_MODE_V(x) ((x) << RX_DACK_MODE_S)
#define RX_DACK_MODE_G(x) (((x) >> RX_DACK_MODE_S) & RX_DACK_MODE_M)
#define RX_DACK_CHANGE_S 31
#define RX_DACK_CHANGE_V(x) ((x) << RX_DACK_CHANGE_S)
#define RX_DACK_CHANGE_F RX_DACK_CHANGE_V(1U)
enum { /* TCP congestion control algorithms */
CONG_ALG_RENO,
CONG_ALG_TAHOE,
CONG_ALG_NEWRENO,
CONG_ALG_HIGHSPEED
};
#define CONG_CNTRL_S 14
#define CONG_CNTRL_M 0x3
#define CONG_CNTRL_V(x) ((x) << CONG_CNTRL_S)
#define CONG_CNTRL_G(x) (((x) >> CONG_CNTRL_S) & CONG_CNTRL_M)
#define T5_ISS_S 18
#define T5_ISS_V(x) ((x) << T5_ISS_S)
#define T5_ISS_F T5_ISS_V(1U)
#endif /* _T4FW_RI_API_H_ */

11
drivers/net/ethernet/chelsio/Kconfig
Просмотреть файл

@ -96,6 +96,17 @@ config CHELSIO_T4_DCB
If unsure, say N.
config CHELSIO_T4_UWIRE
bool "Unified Wire Support for Chelsio T5 cards"
default n
depends on CHELSIO_T4
---help---
Enable unified-wire offload features.
Say Y here if you want to enable unified-wire over Ethernet
in the driver.
If unsure, say N.
config CHELSIO_T4_FCOE
bool "Fibre Channel over Ethernet (FCoE) Support for Chelsio T5 cards"
default n

1
drivers/net/ethernet/chelsio/cxgb4/Makefile
Просмотреть файл

@ -7,4 +7,5 @@ obj-$(CONFIG_CHELSIO_T4) += cxgb4.o
cxgb4-objs := cxgb4_main.o l2t.o t4_hw.o sge.o clip_tbl.o cxgb4_ethtool.o
cxgb4-$(CONFIG_CHELSIO_T4_DCB) += cxgb4_dcb.o
cxgb4-$(CONFIG_CHELSIO_T4_FCOE) += cxgb4_fcoe.o
cxgb4-$(CONFIG_CHELSIO_T4_UWIRE) += cxgb4_ppm.o
cxgb4-$(CONFIG_DEBUG_FS) += cxgb4_debugfs.o

27
drivers/net/ethernet/chelsio/cxgb4/cxgb4.h
Просмотреть файл

@ -404,6 +404,9 @@ enum {
MAX_CTRL_QUEUES = NCHAN, /* # of control Tx queues */
MAX_RDMA_QUEUES = NCHAN, /* # of streaming RDMA Rx queues */
MAX_RDMA_CIQS = 32, /* # of RDMA concentrator IQs */
/* # of streaming iSCSIT Rx queues */
MAX_ISCSIT_QUEUES = MAX_OFLD_QSETS,
};
enum {
@ -420,8 +423,8 @@ enum {
enum {
INGQ_EXTRAS = 2, /* firmware event queue and */
/* forwarded interrupts */
MAX_INGQ = MAX_ETH_QSETS + MAX_OFLD_QSETS + MAX_RDMA_QUEUES
+ MAX_RDMA_CIQS + INGQ_EXTRAS,
MAX_INGQ = MAX_ETH_QSETS + MAX_OFLD_QSETS + MAX_RDMA_QUEUES +
MAX_RDMA_CIQS + MAX_ISCSIT_QUEUES + INGQ_EXTRAS,
};
struct adapter;
@ -508,6 +511,15 @@ struct pkt_gl {
typedef int (*rspq_handler_t)(struct sge_rspq *q, const __be64 *rsp,
const struct pkt_gl *gl);
typedef void (*rspq_flush_handler_t)(struct sge_rspq *q);
/* LRO related declarations for ULD */
struct t4_lro_mgr {
#define MAX_LRO_SESSIONS 64
u8 lro_session_cnt; /* # of sessions to aggregate */
unsigned long lro_pkts; /* # of LRO super packets */
unsigned long lro_merged; /* # of wire packets merged by LRO */
struct sk_buff_head lroq; /* list of aggregated sessions */
};
struct sge_rspq { /* state for an SGE response queue */
struct napi_struct napi;
@ -532,6 +544,8 @@ struct sge_rspq { /* state for an SGE response queue */
struct adapter *adap;
struct net_device *netdev; /* associated net device */
rspq_handler_t handler;
rspq_flush_handler_t flush_handler;
struct t4_lro_mgr lro_mgr;
#ifdef CONFIG_NET_RX_BUSY_POLL
#define CXGB_POLL_STATE_IDLE 0
#define CXGB_POLL_STATE_NAPI BIT(0) /* NAPI owns this poll */
@ -641,6 +655,7 @@ struct sge {
struct sge_eth_rxq ethrxq[MAX_ETH_QSETS];
struct sge_ofld_rxq iscsirxq[MAX_OFLD_QSETS];
struct sge_ofld_rxq iscsitrxq[MAX_ISCSIT_QUEUES];
struct sge_ofld_rxq rdmarxq[MAX_RDMA_QUEUES];
struct sge_ofld_rxq rdmaciq[MAX_RDMA_CIQS];
struct sge_rspq fw_evtq ____cacheline_aligned_in_smp;
@ -652,9 +667,11 @@ struct sge {
u16 ethqsets; /* # of active Ethernet queue sets */
u16 ethtxq_rover; /* Tx queue to clean up next */
u16 iscsiqsets; /* # of active iSCSI queue sets */
u16 niscsitq; /* # of available iSCST Rx queues */
u16 rdmaqs; /* # of available RDMA Rx queues */
u16 rdmaciqs; /* # of available RDMA concentrator IQs */
u16 iscsi_rxq[MAX_OFLD_QSETS];
u16 iscsit_rxq[MAX_ISCSIT_QUEUES];
u16 rdma_rxq[MAX_RDMA_QUEUES];
u16 rdma_ciq[MAX_RDMA_CIQS];
u16 timer_val[SGE_NTIMERS];
@ -681,6 +698,7 @@ struct sge {
#define for_each_ethrxq(sge, i) for (i = 0; i < (sge)->ethqsets; i++)
#define for_each_iscsirxq(sge, i) for (i = 0; i < (sge)->iscsiqsets; i++)
#define for_each_iscsitrxq(sge, i) for (i = 0; i < (sge)->niscsitq; i++)
#define for_each_rdmarxq(sge, i) for (i = 0; i < (sge)->rdmaqs; i++)
#define for_each_rdmaciq(sge, i) for (i = 0; i < (sge)->rdmaciqs; i++)
@ -747,6 +765,8 @@ struct adapter {
struct list_head rcu_node;
struct list_head mac_hlist; /* list of MAC addresses in MPS Hash */
void *iscsi_ppm;
struct tid_info tids;
void **tid_release_head;
spinlock_t tid_release_lock;
@ -1113,7 +1133,8 @@ int t4_mgmt_tx(struct adapter *adap, struct sk_buff *skb);
int t4_ofld_send(struct adapter *adap, struct sk_buff *skb);
int t4_sge_alloc_rxq(struct adapter *adap, struct sge_rspq *iq, bool fwevtq,
struct net_device *dev, int intr_idx,
struct sge_fl *fl, rspq_handler_t hnd, int cong);
struct sge_fl *fl, rspq_handler_t hnd,
rspq_flush_handler_t flush_handler, int cong);
int t4_sge_alloc_eth_txq(struct adapter *adap, struct sge_eth_txq *txq,
struct net_device *dev, struct netdev_queue *netdevq,
unsigned int iqid);

34
drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c
Просмотреть файл

@ -2334,12 +2334,14 @@ static int sge_qinfo_show(struct seq_file *seq, void *v)
struct adapter *adap = seq->private;
int eth_entries = DIV_ROUND_UP(adap->sge.ethqsets, 4);
int iscsi_entries = DIV_ROUND_UP(adap->sge.iscsiqsets, 4);
int iscsit_entries = DIV_ROUND_UP(adap->sge.niscsitq, 4);
int rdma_entries = DIV_ROUND_UP(adap->sge.rdmaqs, 4);
int ciq_entries = DIV_ROUND_UP(adap->sge.rdmaciqs, 4);
int ctrl_entries = DIV_ROUND_UP(MAX_CTRL_QUEUES, 4);
int i, r = (uintptr_t)v - 1;
int iscsi_idx = r - eth_entries;
int rdma_idx = iscsi_idx - iscsi_entries;
int iscsit_idx = iscsi_idx - iscsi_entries;
int rdma_idx = iscsit_idx - iscsit_entries;
int ciq_idx = rdma_idx - rdma_entries;
int ctrl_idx = ciq_idx - ciq_entries;
int fq_idx = ctrl_idx - ctrl_entries;
@ -2453,6 +2455,35 @@ do { \
RL("FLLow:", fl.low);
RL("FLStarving:", fl.starving);
} else if (iscsit_idx < iscsit_entries) {
const struct sge_ofld_rxq *rx =
&adap->sge.iscsitrxq[iscsit_idx * 4];
int n = min(4, adap->sge.niscsitq - 4 * iscsit_idx);
S("QType:", "iSCSIT");
R("RspQ ID:", rspq.abs_id);
R("RspQ size:", rspq.size);
R("RspQE size:", rspq.iqe_len);
R("RspQ CIDX:", rspq.cidx);
R("RspQ Gen:", rspq.gen);
S3("u", "Intr delay:", qtimer_val(adap, &rx[i].rspq));
S3("u", "Intr pktcnt:",
adap->sge.counter_val[rx[i].rspq.pktcnt_idx]);
R("FL ID:", fl.cntxt_id);
R("FL size:", fl.size - 8);
R("FL pend:", fl.pend_cred);
R("FL avail:", fl.avail);
R("FL PIDX:", fl.pidx);
R("FL CIDX:", fl.cidx);
RL("RxPackets:", stats.pkts);
RL("RxImmPkts:", stats.imm);
RL("RxNoMem:", stats.nomem);
RL("FLAllocErr:", fl.alloc_failed);
RL("FLLrgAlcErr:", fl.large_alloc_failed);
RL("FLMapErr:", fl.mapping_err);
RL("FLLow:", fl.low);
RL("FLStarving:", fl.starving);
} else if (rdma_idx < rdma_entries) {
const struct sge_ofld_rxq *rx =
&adap->sge.rdmarxq[rdma_idx * 4];
@ -2543,6 +2574,7 @@ static int sge_queue_entries(const struct adapter *adap)
{
return DIV_ROUND_UP(adap->sge.ethqsets, 4) +
DIV_ROUND_UP(adap->sge.iscsiqsets, 4) +
DIV_ROUND_UP(adap->sge.niscsitq, 4) +
DIV_ROUND_UP(adap->sge.rdmaqs, 4) +
DIV_ROUND_UP(adap->sge.rdmaciqs, 4) +
DIV_ROUND_UP(MAX_CTRL_QUEUES, 4) + 1;

97
drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
Просмотреть файл

@ -227,7 +227,7 @@ static DEFINE_MUTEX(uld_mutex);
static LIST_HEAD(adap_rcu_list);
static DEFINE_SPINLOCK(adap_rcu_lock);
static struct cxgb4_uld_info ulds[CXGB4_ULD_MAX];
static const char *uld_str[] = { "RDMA", "iSCSI" };
static const char *const uld_str[] = { "RDMA", "iSCSI", "iSCSIT" };
static void link_report(struct net_device *dev)
{
@ -664,6 +664,13 @@ out:
return 0;
}
/* Flush the aggregated lro sessions */
static void uldrx_flush_handler(struct sge_rspq *q)
{
if (ulds[q->uld].lro_flush)
ulds[q->uld].lro_flush(&q->lro_mgr);
}
/**
* uldrx_handler - response queue handler for ULD queues
* @q: the response queue that received the packet
@ -677,6 +684,7 @@ static int uldrx_handler(struct sge_rspq *q, const __be64 *rsp,
const struct pkt_gl *gl)
{
struct sge_ofld_rxq *rxq = container_of(q, struct sge_ofld_rxq, rspq);
int ret;
/* FW can send CPLs encapsulated in a CPL_FW4_MSG.
*/
@ -684,10 +692,19 @@ static int uldrx_handler(struct sge_rspq *q, const __be64 *rsp,
((const struct cpl_fw4_msg *)(rsp + 1))->type == FW_TYPE_RSSCPL)
rsp += 2;
if (ulds[q->uld].rx_handler(q->adap->uld_handle[q->uld], rsp, gl)) {
if (q->flush_handler)
ret = ulds[q->uld].lro_rx_handler(q->adap->uld_handle[q->uld],
rsp, gl, &q->lro_mgr,
&q->napi);
else
ret = ulds[q->uld].rx_handler(q->adap->uld_handle[q->uld],
rsp, gl);
if (ret) {
rxq->stats.nomem++;
return -1;
}
if (gl == NULL)
rxq->stats.imm++;
else if (gl == CXGB4_MSG_AN)
@ -754,6 +771,10 @@ static void name_msix_vecs(struct adapter *adap)
snprintf(adap->msix_info[msi_idx++].desc, n, "%s-iscsi%d",
adap->port[0]->name, i);
for_each_iscsitrxq(&adap->sge, i)
snprintf(adap->msix_info[msi_idx++].desc, n, "%s-iSCSIT%d",
adap->port[0]->name, i);
for_each_rdmarxq(&adap->sge, i)
snprintf(adap->msix_info[msi_idx++].desc, n, "%s-rdma%d",
adap->port[0]->name, i);
@ -767,6 +788,7 @@ static int request_msix_queue_irqs(struct adapter *adap)
{
struct sge *s = &adap->sge;
int err, ethqidx, iscsiqidx = 0, rdmaqidx = 0, rdmaciqqidx = 0;
int iscsitqidx = 0;
int msi_index = 2;
err = request_irq(adap->msix_info[1].vec, t4_sge_intr_msix, 0,
@ -792,6 +814,15 @@ static int request_msix_queue_irqs(struct adapter *adap)
goto unwind;
msi_index++;
}
for_each_iscsitrxq(s, iscsitqidx) {
err = request_irq(adap->msix_info[msi_index].vec,
t4_sge_intr_msix, 0,
adap->msix_info[msi_index].desc,
&s->iscsitrxq[iscsitqidx].rspq);
if (err)
goto unwind;
msi_index++;
}
for_each_rdmarxq(s, rdmaqidx) {
err = request_irq(adap->msix_info[msi_index].vec,
t4_sge_intr_msix, 0,
@ -819,6 +850,9 @@ unwind:
while (--rdmaqidx >= 0)
free_irq(adap->msix_info[--msi_index].vec,
&s->rdmarxq[rdmaqidx].rspq);
while (--iscsitqidx >= 0)
free_irq(adap->msix_info[--msi_index].vec,
&s->iscsitrxq[iscsitqidx].rspq);
while (--iscsiqidx >= 0)
free_irq(adap->msix_info[--msi_index].vec,
&s->iscsirxq[iscsiqidx].rspq);
@ -840,6 +874,9 @@ static void free_msix_queue_irqs(struct adapter *adap)
for_each_iscsirxq(s, i)
free_irq(adap->msix_info[msi_index++].vec,
&s->iscsirxq[i].rspq);
for_each_iscsitrxq(s, i)
free_irq(adap->msix_info[msi_index++].vec,
&s->iscsitrxq[i].rspq);
for_each_rdmarxq(s, i)
free_irq(adap->msix_info[msi_index++].vec, &s->rdmarxq[i].rspq);
for_each_rdmaciq(s, i)
@ -984,7 +1021,7 @@ static void enable_rx(struct adapter *adap)
static int alloc_ofld_rxqs(struct adapter *adap, struct sge_ofld_rxq *q,
unsigned int nq, unsigned int per_chan, int msi_idx,
u16 *ids)
u16 *ids, bool lro)
{
int i, err;
@ -994,7 +1031,9 @@ static int alloc_ofld_rxqs(struct adapter *adap, struct sge_ofld_rxq *q,
err = t4_sge_alloc_rxq(adap, &q->rspq, false,
adap->port[i / per_chan],
msi_idx, q->fl.size ? &q->fl : NULL,
uldrx_handler, 0);
uldrx_handler,
lro ? uldrx_flush_handler : NULL,
0);
if (err)
return err;
memset(&q->stats, 0, sizeof(q->stats));
@ -1024,7 +1063,7 @@ static int setup_sge_queues(struct adapter *adap)
msi_idx = 1; /* vector 0 is for non-queue interrupts */
else {
err = t4_sge_alloc_rxq(adap, &s->intrq, false, adap->port[0], 0,
NULL, NULL, -1);
NULL, NULL, NULL, -1);
if (err)
return err;
msi_idx = -((int)s->intrq.abs_id + 1);
@ -1044,7 +1083,7 @@ static int setup_sge_queues(struct adapter *adap)
* new/deleted queues.
*/
err = t4_sge_alloc_rxq(adap, &s->fw_evtq, true, adap->port[0],
msi_idx, NULL, fwevtq_handler, -1);
msi_idx, NULL, fwevtq_handler, NULL, -1);
if (err) {
freeout: t4_free_sge_resources(adap);
return err;
@ -1062,6 +1101,7 @@ freeout: t4_free_sge_resources(adap);
err = t4_sge_alloc_rxq(adap, &q->rspq, false, dev,
msi_idx, &q->fl,
t4_ethrx_handler,
NULL,
t4_get_mps_bg_map(adap,
pi->tx_chan));
if (err)
@ -1087,18 +1127,19 @@ freeout: t4_free_sge_resources(adap);
goto freeout;
}
#define ALLOC_OFLD_RXQS(firstq, nq, per_chan, ids) do { \
err = alloc_ofld_rxqs(adap, firstq, nq, per_chan, msi_idx, ids); \
#define ALLOC_OFLD_RXQS(firstq, nq, per_chan, ids, lro) do { \
err = alloc_ofld_rxqs(adap, firstq, nq, per_chan, msi_idx, ids, lro); \
if (err) \
goto freeout; \
if (msi_idx > 0) \
msi_idx += nq; \
} while (0)
ALLOC_OFLD_RXQS(s->iscsirxq, s->iscsiqsets, j, s->iscsi_rxq);
ALLOC_OFLD_RXQS(s->rdmarxq, s->rdmaqs, 1, s->rdma_rxq);
ALLOC_OFLD_RXQS(s->iscsirxq, s->iscsiqsets, j, s->iscsi_rxq, false);
ALLOC_OFLD_RXQS(s->iscsitrxq, s->niscsitq, j, s->iscsit_rxq, true);
ALLOC_OFLD_RXQS(s->rdmarxq, s->rdmaqs, 1, s->rdma_rxq, false);
j = s->rdmaciqs / adap->params.nports; /* rdmaq queues per channel */
ALLOC_OFLD_RXQS(s->rdmaciq, s->rdmaciqs, j, s->rdma_ciq);
ALLOC_OFLD_RXQS(s->rdmaciq, s->rdmaciqs, j, s->rdma_ciq, false);
#undef ALLOC_OFLD_RXQS
@ -2430,6 +2471,9 @@ static void uld_attach(struct adapter *adap, unsigned int uld)
} else if (uld == CXGB4_ULD_ISCSI) {
lli.rxq_ids = adap->sge.iscsi_rxq;
lli.nrxq = adap->sge.iscsiqsets;
} else if (uld == CXGB4_ULD_ISCSIT) {
lli.rxq_ids = adap->sge.iscsit_rxq;
lli.nrxq = adap->sge.niscsitq;
}
lli.ntxq = adap->sge.iscsiqsets;
lli.nchan = adap->params.nports;
@ -2437,6 +2481,10 @@ static void uld_attach(struct adapter *adap, unsigned int uld)
lli.wr_cred = adap->params.ofldq_wr_cred;
lli.adapter_type = adap->params.chip;
lli.iscsi_iolen = MAXRXDATA_G(t4_read_reg(adap, TP_PARA_REG2_A));
lli.iscsi_tagmask = t4_read_reg(adap, ULP_RX_ISCSI_TAGMASK_A);
lli.iscsi_pgsz_order = t4_read_reg(adap, ULP_RX_ISCSI_PSZ_A);
lli.iscsi_llimit = t4_read_reg(adap, ULP_RX_ISCSI_LLIMIT_A);
lli.iscsi_ppm = &adap->iscsi_ppm;
lli.cclk_ps = 1000000000 / adap->params.vpd.cclk;
lli.udb_density = 1 << adap->params.sge.eq_qpp;
lli.ucq_density = 1 << adap->params.sge.iq_qpp;
@ -4336,6 +4384,9 @@ static void cfg_queues(struct adapter *adap)
s->rdmaciqs = (s->rdmaciqs / adap->params.nports) *
adap->params.nports;
s->rdmaciqs = max_t(int, s->rdmaciqs, adap->params.nports);
if (!is_t4(adap->params.chip))
s->niscsitq = s->iscsiqsets;
}
for (i = 0; i < ARRAY_SIZE(s->ethrxq); i++) {
@ -4362,6 +4413,16 @@ static void cfg_queues(struct adapter *adap)
r->fl.size = 72;
}
if (!is_t4(adap->params.chip)) {
for (i = 0; i < ARRAY_SIZE(s->iscsitrxq); i++) {
struct sge_ofld_rxq *r = &s->iscsitrxq[i];
init_rspq(adap, &r->rspq, 5, 1, 1024, 64);
r->rspq.uld = CXGB4_ULD_ISCSIT;
r->fl.size = 72;
}
}
for (i = 0; i < ARRAY_SIZE(s->rdmarxq); i++) {
struct sge_ofld_rxq *r = &s->rdmarxq[i];
@ -4436,9 +4497,13 @@ static int enable_msix(struct adapter *adap)
want = s->max_ethqsets + EXTRA_VECS;
if (is_offload(adap)) {
want += s->rdmaqs + s->rdmaciqs + s->iscsiqsets;
want += s->rdmaqs + s->rdmaciqs + s->iscsiqsets +
s->niscsitq;
/* need nchan for each possible ULD */
ofld_need = 3 * nchan;
if (is_t4(adap->params.chip))
ofld_need = 3 * nchan;
else
ofld_need = 4 * nchan;
}
#ifdef CONFIG_CHELSIO_T4_DCB
/* For Data Center Bridging we need 8 Ethernet TX Priority Queues for
@ -4470,12 +4535,16 @@ static int enable_msix(struct adapter *adap)
if (allocated < want) {
s->rdmaqs = nchan;
s->rdmaciqs = nchan;
if (!is_t4(adap->params.chip))
s->niscsitq = nchan;
}
/* leftovers go to OFLD */
i = allocated - EXTRA_VECS - s->max_ethqsets -
s->rdmaqs - s->rdmaciqs;
s->rdmaqs - s->rdmaciqs - s->niscsitq;
s->iscsiqsets = (i / nchan) * nchan; /* round down */
}
for (i = 0; i < allocated; ++i)
adap->msix_info[i].vec = entries[i].vector;

464
drivers/net/ethernet/chelsio/cxgb4/cxgb4_ppm.c Normal file
Просмотреть файл

@ -0,0 +1,464 @@
/*
* cxgb4_ppm.c: Chelsio common library for T4/T5 iSCSI PagePod Manager
*
* Copyright (c) 2016 Chelsio Communications, Inc. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Written by: Karen Xie (kxie@chelsio.com)
*/
#include <linux/kernel.h>
#include <linux/version.h>
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/debugfs.h>
#include <linux/export.h>
#include <linux/list.h>
#include <linux/skbuff.h>
#include <linux/pci.h>
#include <linux/scatterlist.h>
#include "cxgb4_ppm.h"
/* Direct Data Placement -
* Directly place the iSCSI Data-In or Data-Out PDU's payload into
* pre-posted final destination host-memory buffers based on the
* Initiator Task Tag (ITT) in Data-In or Target Task Tag (TTT)
* in Data-Out PDUs. The host memory address is programmed into
* h/w in the format of pagepod entries. The location of the
* pagepod entry is encoded into ddp tag which is used as the base
* for ITT/TTT.
*/
/* Direct-Data Placement page size adjustment
*/
int cxgbi_ppm_find_page_index(struct cxgbi_ppm *ppm, unsigned long pgsz)
{
struct cxgbi_tag_format *tformat = &ppm->tformat;
int i;
for (i = 0; i < DDP_PGIDX_MAX; i++) {
if (pgsz == 1UL << (DDP_PGSZ_BASE_SHIFT +
tformat->pgsz_order[i])) {
pr_debug("%s: %s ppm, pgsz %lu -> idx %d.\n",
__func__, ppm->ndev->name, pgsz, i);
return i;
}
}
pr_info("ippm: ddp page size %lu not supported.\n", pgsz);
return DDP_PGIDX_MAX;
}
/* DDP setup & teardown
*/
static int ppm_find_unused_entries(unsigned long *bmap,
unsigned int max_ppods,
unsigned int start,
unsigned int nr,
unsigned int align_mask)
{
unsigned long i;
i = bitmap_find_next_zero_area(bmap, max_ppods, start, nr, align_mask);
if (unlikely(i >= max_ppods) && (start > nr))
i = bitmap_find_next_zero_area(bmap, max_ppods, 0, start - 1,
align_mask);
if (unlikely(i >= max_ppods))
return -ENOSPC;
bitmap_set(bmap, i, nr);
return (int)i;
}
static void ppm_mark_entries(struct cxgbi_ppm *ppm, int i, int count,
unsigned long caller_data)
{
struct cxgbi_ppod_data *pdata = ppm->ppod_data + i;
pdata->caller_data = caller_data;
pdata->npods = count;
if (pdata->color == ((1 << PPOD_IDX_SHIFT) - 1))
pdata->color = 0;
else
pdata->color++;
}
static int ppm_get_cpu_entries(struct cxgbi_ppm *ppm, unsigned int count,
unsigned long caller_data)
{
struct cxgbi_ppm_pool *pool;
unsigned int cpu;
int i;
cpu = get_cpu();
pool = per_cpu_ptr(ppm->pool, cpu);
spin_lock_bh(&pool->lock);
put_cpu();
i = ppm_find_unused_entries(pool->bmap, ppm->pool_index_max,
pool->next, count, 0);
if (i < 0) {
pool->next = 0;
spin_unlock_bh(&pool->lock);
return -ENOSPC;
}
pool->next = i + count;
if (pool->next >= ppm->pool_index_max)
pool->next = 0;
spin_unlock_bh(&pool->lock);
pr_debug("%s: cpu %u, idx %d + %d (%d), next %u.\n",
__func__, cpu, i, count, i + cpu * ppm->pool_index_max,
pool->next);
i += cpu * ppm->pool_index_max;
ppm_mark_entries(ppm, i, count, caller_data);
return i;
}
static int ppm_get_entries(struct cxgbi_ppm *ppm, unsigned int count,
unsigned long caller_data)
{
int i;
spin_lock_bh(&ppm->map_lock);
i = ppm_find_unused_entries(ppm->ppod_bmap, ppm->bmap_index_max,
ppm->next, count, 0);
if (i < 0) {
ppm->next = 0;
spin_unlock_bh(&ppm->map_lock);
pr_debug("ippm: NO suitable entries %u available.\n",
count);
return -ENOSPC;
}
ppm->next = i + count;
if (ppm->next >= ppm->bmap_index_max)
ppm->next = 0;
spin_unlock_bh(&ppm->map_lock);
pr_debug("%s: idx %d + %d (%d), next %u, caller_data 0x%lx.\n",
__func__, i, count, i + ppm->pool_rsvd, ppm->next,
caller_data);
i += ppm->pool_rsvd;
ppm_mark_entries(ppm, i, count, caller_data);
return i;
}
static void ppm_unmark_entries(struct cxgbi_ppm *ppm, int i, int count)
{
pr_debug("%s: idx %d + %d.\n", __func__, i, count);
if (i < ppm->pool_rsvd) {
unsigned int cpu;
struct cxgbi_ppm_pool *pool;
cpu = i / ppm->pool_index_max;
i %= ppm->pool_index_max;
pool = per_cpu_ptr(ppm->pool, cpu);
spin_lock_bh(&pool->lock);
bitmap_clear(pool->bmap, i, count);
if (i < pool->next)
pool->next = i;
spin_unlock_bh(&pool->lock);
pr_debug("%s: cpu %u, idx %d, next %u.\n",
__func__, cpu, i, pool->next);
} else {
spin_lock_bh(&ppm->map_lock);
i -= ppm->pool_rsvd;
bitmap_clear(ppm->ppod_bmap, i, count);
if (i < ppm->next)
ppm->next = i;
spin_unlock_bh(&ppm->map_lock);
pr_debug("%s: idx %d, next %u.\n", __func__, i, ppm->next);
}
}
void cxgbi_ppm_ppod_release(struct cxgbi_ppm *ppm, u32 idx)
{
struct cxgbi_ppod_data *pdata;
if (idx >= ppm->ppmax) {
pr_warn("ippm: idx too big %u > %u.\n", idx, ppm->ppmax);
return;
}
pdata = ppm->ppod_data + idx;
if (!pdata->npods) {
pr_warn("ippm: idx %u, npods 0.\n", idx);
return;
}
pr_debug("release idx %u, npods %u.\n", idx, pdata->npods);
ppm_unmark_entries(ppm, idx, pdata->npods);
}
EXPORT_SYMBOL(cxgbi_ppm_ppod_release);
int cxgbi_ppm_ppods_reserve(struct cxgbi_ppm *ppm, unsigned short nr_pages,
u32 per_tag_pg_idx, u32 *ppod_idx,
u32 *ddp_tag, unsigned long caller_data)
{
struct cxgbi_ppod_data *pdata;
unsigned int npods;
int idx = -1;
unsigned int hwidx;
u32 tag;
npods = (nr_pages + PPOD_PAGES_MAX - 1) >> PPOD_PAGES_SHIFT;
if (!npods) {
pr_warn("%s: pages %u -> npods %u, full.\n",
__func__, nr_pages, npods);
return -EINVAL;
}
/* grab from cpu pool first */
idx = ppm_get_cpu_entries(ppm, npods, caller_data);
/* try the general pool */
if (idx < 0)
idx = ppm_get_entries(ppm, npods, caller_data);
if (idx < 0) {
pr_debug("ippm: pages %u, nospc %u, nxt %u, 0x%lx.\n",
nr_pages, npods, ppm->next, caller_data);
return idx;
}
pdata = ppm->ppod_data + idx;
hwidx = ppm->base_idx + idx;
tag = cxgbi_ppm_make_ddp_tag(hwidx, pdata->color);
if (per_tag_pg_idx)
tag |= (per_tag_pg_idx << 30) & 0xC0000000;
*ppod_idx = idx;
*ddp_tag = tag;
pr_debug("ippm: sg %u, tag 0x%x(%u,%u), data 0x%lx.\n",
nr_pages, tag, idx, npods, caller_data);
return npods;
}
EXPORT_SYMBOL(cxgbi_ppm_ppods_reserve);
void cxgbi_ppm_make_ppod_hdr(struct cxgbi_ppm *ppm, u32 tag,
unsigned int tid, unsigned int offset,
unsigned int length,
struct cxgbi_pagepod_hdr *hdr)
{
/* The ddp tag in pagepod should be with bit 31:30 set to 0.
* The ddp Tag on the wire should be with non-zero 31:30 to the peer
*/
tag &= 0x3FFFFFFF;
hdr->vld_tid = htonl(PPOD_VALID_FLAG | PPOD_TID(tid));
hdr->rsvd = 0;
hdr->pgsz_tag_clr = htonl(tag & ppm->tformat.idx_clr_mask);
hdr->max_offset = htonl(length);
hdr->page_offset = htonl(offset);
pr_debug("ippm: tag 0x%x, tid 0x%x, xfer %u, off %u.\n",
tag, tid, length, offset);
}
EXPORT_SYMBOL(cxgbi_ppm_make_ppod_hdr);
static void ppm_free(struct cxgbi_ppm *ppm)
{
vfree(ppm);
}
static void ppm_destroy(struct kref *kref)
{
struct cxgbi_ppm *ppm = container_of(kref,
struct cxgbi_ppm,
refcnt);
pr_info("ippm: kref 0, destroy %s ppm 0x%p.\n",
ppm->ndev->name, ppm);
*ppm->ppm_pp = NULL;
free_percpu(ppm->pool);
ppm_free(ppm);
}
int cxgbi_ppm_release(struct cxgbi_ppm *ppm)
{
if (ppm) {
int rv;
rv = kref_put(&ppm->refcnt, ppm_destroy);
return rv;
}
return 1;
}
static struct cxgbi_ppm_pool *ppm_alloc_cpu_pool(unsigned int *total,
unsigned int *pcpu_ppmax)
{
struct cxgbi_ppm_pool *pools;
unsigned int ppmax = (*total) / num_possible_cpus();
unsigned int max = (PCPU_MIN_UNIT_SIZE - sizeof(*pools)) << 3;
unsigned int bmap;
unsigned int alloc_sz;
unsigned int count = 0;
unsigned int cpu;
/* make sure per cpu pool fits into PCPU_MIN_UNIT_SIZE */
if (ppmax > max)
ppmax = max;
/* pool size must be multiple of unsigned long */
bmap = BITS_TO_LONGS(ppmax);
ppmax = (bmap * sizeof(unsigned long)) << 3;
alloc_sz = sizeof(*pools) + sizeof(unsigned long) * bmap;
pools = __alloc_percpu(alloc_sz, __alignof__(struct cxgbi_ppm_pool));
if (!pools)
return NULL;
for_each_possible_cpu(cpu) {
struct cxgbi_ppm_pool *ppool = per_cpu_ptr(pools, cpu);
memset(ppool, 0, alloc_sz);
spin_lock_init(&ppool->lock);
count += ppmax;
}
*total = count;
*pcpu_ppmax = ppmax;
return pools;
}
int cxgbi_ppm_init(void **ppm_pp, struct net_device *ndev,
struct pci_dev *pdev, void *lldev,
struct cxgbi_tag_format *tformat,
unsigned int ppmax,
unsigned int llimit,
unsigned int start,
unsigned int reserve_factor)
{
struct cxgbi_ppm *ppm = (struct cxgbi_ppm *)(*ppm_pp);
struct cxgbi_ppm_pool *pool = NULL;
unsigned int ppmax_pool = 0;
unsigned int pool_index_max = 0;
unsigned int alloc_sz;
unsigned int ppod_bmap_size;
if (ppm) {
pr_info("ippm: %s, ppm 0x%p,0x%p already initialized, %u/%u.\n",
ndev->name, ppm_pp, ppm, ppm->ppmax, ppmax);
kref_get(&ppm->refcnt);
return 1;
}
if (reserve_factor) {
ppmax_pool = ppmax / reserve_factor;
pool = ppm_alloc_cpu_pool(&ppmax_pool, &pool_index_max);
pr_debug("%s: ppmax %u, cpu total %u, per cpu %u.\n",
ndev->name, ppmax, ppmax_pool, pool_index_max);
}
ppod_bmap_size = BITS_TO_LONGS(ppmax - ppmax_pool);
alloc_sz = sizeof(struct cxgbi_ppm) +
ppmax * (sizeof(struct cxgbi_ppod_data)) +
ppod_bmap_size * sizeof(unsigned long);
ppm = vmalloc(alloc_sz);
if (!ppm)
goto release_ppm_pool;
memset(ppm, 0, alloc_sz);
ppm->ppod_bmap = (unsigned long *)(&ppm->ppod_data[ppmax]);
if ((ppod_bmap_size >> 3) > (ppmax - ppmax_pool)) {
unsigned int start = ppmax - ppmax_pool;
unsigned int end = ppod_bmap_size >> 3;
bitmap_set(ppm->ppod_bmap, ppmax, end - start);
pr_info("%s: %u - %u < %u * 8, mask extra bits %u, %u.\n",
__func__, ppmax, ppmax_pool, ppod_bmap_size, start,
end);
}
spin_lock_init(&ppm->map_lock);
kref_init(&ppm->refcnt);
memcpy(&ppm->tformat, tformat, sizeof(struct cxgbi_tag_format));
ppm->ppm_pp = ppm_pp;
ppm->ndev = ndev;
ppm->pdev = pdev;
ppm->lldev = lldev;
ppm->ppmax = ppmax;
ppm->next = 0;
ppm->llimit = llimit;
ppm->base_idx = start > llimit ?
(start - llimit + 1) >> PPOD_SIZE_SHIFT : 0;
ppm->bmap_index_max = ppmax - ppmax_pool;
ppm->pool = pool;
ppm->pool_rsvd = ppmax_pool;
ppm->pool_index_max = pool_index_max;
/* check one more time */
if (*ppm_pp) {
ppm_free(ppm);
ppm = (struct cxgbi_ppm *)(*ppm_pp);
pr_info("ippm: %s, ppm 0x%p,0x%p already initialized, %u/%u.\n",
ndev->name, ppm_pp, *ppm_pp, ppm->ppmax, ppmax);
kref_get(&ppm->refcnt);
return 1;
}
*ppm_pp = ppm;
ppm->tformat.pgsz_idx_dflt = cxgbi_ppm_find_page_index(ppm, PAGE_SIZE);
pr_info("ippm %s: ppm 0x%p, 0x%p, base %u/%u, pg %lu,%u, rsvd %u,%u.\n",
ndev->name, ppm_pp, ppm, ppm->base_idx, ppm->ppmax, PAGE_SIZE,
ppm->tformat.pgsz_idx_dflt, ppm->pool_rsvd,
ppm->pool_index_max);
return 0;
release_ppm_pool:
free_percpu(pool);
return -ENOMEM;
}
EXPORT_SYMBOL(cxgbi_ppm_init);
unsigned int cxgbi_tagmask_set(unsigned int ppmax)
{
unsigned int bits = fls(ppmax);
if (bits > PPOD_IDX_MAX_SIZE)
bits = PPOD_IDX_MAX_SIZE;
pr_info("ippm: ppmax %u/0x%x -> bits %u, tagmask 0x%x.\n",
ppmax, ppmax, bits, 1 << (bits + PPOD_IDX_SHIFT));
return 1 << (bits + PPOD_IDX_SHIFT);
}

310
drivers/net/ethernet/chelsio/cxgb4/cxgb4_ppm.h Normal file
Просмотреть файл

@ -0,0 +1,310 @@
/*
* cxgb4_ppm.h: Chelsio common library for T4/T5 iSCSI ddp operation
*
* Copyright (c) 2016 Chelsio Communications, Inc. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Written by: Karen Xie (kxie@chelsio.com)
*/
#ifndef __CXGB4PPM_H__
#define __CXGB4PPM_H__
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/debugfs.h>
#include <linux/list.h>
#include <linux/netdevice.h>
#include <linux/scatterlist.h>
#include <linux/skbuff.h>
#include <linux/vmalloc.h>
#include <linux/bitmap.h>
struct cxgbi_pagepod_hdr {
u32 vld_tid;
u32 pgsz_tag_clr;
u32 max_offset;
u32 page_offset;
u64 rsvd;
};
#define PPOD_PAGES_MAX 4
struct cxgbi_pagepod {
struct cxgbi_pagepod_hdr hdr;
u64 addr[PPOD_PAGES_MAX + 1];
};
/* ddp tag format
* for a 32-bit tag:
* bit #
* 31 ..... ..... 0
* X Y...Y Z...Z, where
* ^ ^^^^^ ^^^^
* | | |____ when ddp bit = 0: color bits
* | |
* | |____ when ddp bit = 0: idx into the ddp memory region
* |
* |____ ddp bit: 0 - ddp tag, 1 - non-ddp tag
*
* [page selector:2] [sw/free bits] [0] [idx] [color:6]
*/
#define DDP_PGIDX_MAX 4
#define DDP_PGSZ_BASE_SHIFT 12 /* base page 4K */
struct cxgbi_task_tag_info {
unsigned char flags;
#define CXGBI_PPOD_INFO_FLAG_VALID 0x1
#define CXGBI_PPOD_INFO_FLAG_MAPPED 0x2
unsigned char cid;
unsigned short pg_shift;
unsigned int npods;
unsigned int idx;
unsigned int tag;
struct cxgbi_pagepod_hdr hdr;
int nents;
int nr_pages;
struct scatterlist *sgl;
};
struct cxgbi_tag_format {
unsigned char pgsz_order[DDP_PGIDX_MAX];
unsigned char pgsz_idx_dflt;
unsigned char free_bits:4;
unsigned char color_bits:4;
unsigned char idx_bits;
unsigned char rsvd_bits;
unsigned int no_ddp_mask;
unsigned int idx_mask;
unsigned int color_mask;
unsigned int idx_clr_mask;
unsigned int rsvd_mask;
};
struct cxgbi_ppod_data {
unsigned char pg_idx:2;
unsigned char color:6;
unsigned char chan_id;
unsigned short npods;
unsigned long caller_data;
};
/* per cpu ppm pool */
struct cxgbi_ppm_pool {
unsigned int base; /* base index */
unsigned int next; /* next possible free index */
spinlock_t lock; /* ppm pool lock */
unsigned long bmap[0];
} ____cacheline_aligned_in_smp;
struct cxgbi_ppm {
struct kref refcnt;
struct net_device *ndev; /* net_device, 1st port */
struct pci_dev *pdev;
void *lldev;
void **ppm_pp;
struct cxgbi_tag_format tformat;
unsigned int ppmax;
unsigned int llimit;
unsigned int base_idx;
unsigned int pool_rsvd;
unsigned int pool_index_max;
struct cxgbi_ppm_pool __percpu *pool;
/* map lock */
spinlock_t map_lock; /* ppm map lock */
unsigned int bmap_index_max;
unsigned int next;
unsigned long *ppod_bmap;
struct cxgbi_ppod_data ppod_data[0];
};
#define DDP_THRESHOLD 512
#define PPOD_PAGES_SHIFT 2 /* 4 pages per pod */
#define IPPOD_SIZE sizeof(struct cxgbi_pagepod) /* 64 */
#define PPOD_SIZE_SHIFT 6
/* page pods are allocated in groups of this size (must be power of 2) */
#define PPOD_CLUSTER_SIZE 16U
#define ULPMEM_DSGL_MAX_NPPODS 16 /* 1024/PPOD_SIZE */
#define ULPMEM_IDATA_MAX_NPPODS 3 /* (PPOD_SIZE * 3 + ulptx hdr) < 256B */
#define PCIE_MEMWIN_MAX_NPPODS 16 /* 1024/PPOD_SIZE */
#define PPOD_COLOR_SHIFT 0
#define PPOD_COLOR(x) ((x) << PPOD_COLOR_SHIFT)
#define PPOD_IDX_SHIFT 6
#define PPOD_IDX_MAX_SIZE 24
#define PPOD_TID_SHIFT 0
#define PPOD_TID(x) ((x) << PPOD_TID_SHIFT)
#define PPOD_TAG_SHIFT 6
#define PPOD_TAG(x) ((x) << PPOD_TAG_SHIFT)
#define PPOD_VALID_SHIFT 24
#define PPOD_VALID(x) ((x) << PPOD_VALID_SHIFT)
#define PPOD_VALID_FLAG PPOD_VALID(1U)
#define PPOD_PI_EXTRACT_CTL_SHIFT 31
#define PPOD_PI_EXTRACT_CTL(x) ((x) << PPOD_PI_EXTRACT_CTL_SHIFT)
#define PPOD_PI_EXTRACT_CTL_FLAG V_PPOD_PI_EXTRACT_CTL(1U)
#define PPOD_PI_TYPE_SHIFT 29
#define PPOD_PI_TYPE_MASK 0x3
#define PPOD_PI_TYPE(x) ((x) << PPOD_PI_TYPE_SHIFT)
#define PPOD_PI_CHECK_CTL_SHIFT 27
#define PPOD_PI_CHECK_CTL_MASK 0x3
#define PPOD_PI_CHECK_CTL(x) ((x) << PPOD_PI_CHECK_CTL_SHIFT)
#define PPOD_PI_REPORT_CTL_SHIFT 25
#define PPOD_PI_REPORT_CTL_MASK 0x3
#define PPOD_PI_REPORT_CTL(x) ((x) << PPOD_PI_REPORT_CTL_SHIFT)
static inline int cxgbi_ppm_is_ddp_tag(struct cxgbi_ppm *ppm, u32 tag)
{
return !(tag & ppm->tformat.no_ddp_mask);
}
static inline int cxgbi_ppm_sw_tag_is_usable(struct cxgbi_ppm *ppm,
u32 tag)
{
/* the sw tag must be using <= 31 bits */
return !(tag & 0x80000000U);
}
static inline int cxgbi_ppm_make_non_ddp_tag(struct cxgbi_ppm *ppm,
u32 sw_tag,
u32 *final_tag)
{
struct cxgbi_tag_format *tformat = &ppm->tformat;
if (!cxgbi_ppm_sw_tag_is_usable(ppm, sw_tag)) {
pr_info("sw_tag 0x%x NOT usable.\n", sw_tag);
return -EINVAL;
}
if (!sw_tag) {
*final_tag = tformat->no_ddp_mask;
} else {
unsigned int shift = tformat->idx_bits + tformat->color_bits;
u32 lower = sw_tag & tformat->idx_clr_mask;
u32 upper = (sw_tag >> shift) << (shift + 1);
*final_tag = upper | tformat->no_ddp_mask | lower;
}
return 0;
}
static inline u32 cxgbi_ppm_decode_non_ddp_tag(struct cxgbi_ppm *ppm,
u32 tag)
{
struct cxgbi_tag_format *tformat = &ppm->tformat;
unsigned int shift = tformat->idx_bits + tformat->color_bits;
u32 lower = tag & tformat->idx_clr_mask;
u32 upper = (tag >> tformat->rsvd_bits) << shift;
return upper | lower;
}
static inline u32 cxgbi_ppm_ddp_tag_get_idx(struct cxgbi_ppm *ppm,
u32 ddp_tag)
{
u32 hw_idx = (ddp_tag >> PPOD_IDX_SHIFT) &
ppm->tformat.idx_mask;
return hw_idx - ppm->base_idx;
}
static inline u32 cxgbi_ppm_make_ddp_tag(unsigned int hw_idx,
unsigned char color)
{
return (hw_idx << PPOD_IDX_SHIFT) | ((u32)color);
}
static inline unsigned long
cxgbi_ppm_get_tag_caller_data(struct cxgbi_ppm *ppm,
u32 ddp_tag)
{
u32 idx = cxgbi_ppm_ddp_tag_get_idx(ppm, ddp_tag);
return ppm->ppod_data[idx].caller_data;
}
/* sw bits are the free bits */
static inline int cxgbi_ppm_ddp_tag_update_sw_bits(struct cxgbi_ppm *ppm,
u32 val, u32 orig_tag,
u32 *final_tag)
{
struct cxgbi_tag_format *tformat = &ppm->tformat;
u32 v = val >> tformat->free_bits;
if (v) {
pr_info("sw_bits 0x%x too large, avail bits %u.\n",
val, tformat->free_bits);
return -EINVAL;
}
if (!cxgbi_ppm_is_ddp_tag(ppm, orig_tag))
return -EINVAL;
*final_tag = (val << tformat->rsvd_bits) |
(orig_tag & ppm->tformat.rsvd_mask);
return 0;
}
static inline void cxgbi_ppm_ppod_clear(struct cxgbi_pagepod *ppod)
{
ppod->hdr.vld_tid = 0U;
}
static inline void cxgbi_tagmask_check(unsigned int tagmask,
struct cxgbi_tag_format *tformat)
{
unsigned int bits = fls(tagmask);
/* reserve top most 2 bits for page selector */
tformat->free_bits = 32 - 2 - bits;
tformat->rsvd_bits = bits;
tformat->color_bits = PPOD_IDX_SHIFT;
tformat->idx_bits = bits - 1 - PPOD_IDX_SHIFT;
tformat->no_ddp_mask = 1 << (bits - 1);
tformat->idx_mask = (1 << tformat->idx_bits) - 1;
tformat->color_mask = (1 << PPOD_IDX_SHIFT) - 1;
tformat->idx_clr_mask = (1 << (bits - 1)) - 1;
tformat->rsvd_mask = (1 << bits) - 1;
pr_info("ippm: tagmask 0x%x, rsvd %u=%u+%u+1, mask 0x%x,0x%x, "
"pg %u,%u,%u,%u.\n",
tagmask, tformat->rsvd_bits, tformat->idx_bits,
tformat->color_bits, tformat->no_ddp_mask, tformat->rsvd_mask,
tformat->pgsz_order[0], tformat->pgsz_order[1],
tformat->pgsz_order[2], tformat->pgsz_order[3]);
}
int cxgbi_ppm_find_page_index(struct cxgbi_ppm *ppm, unsigned long pgsz);
void cxgbi_ppm_make_ppod_hdr(struct cxgbi_ppm *ppm, u32 tag,
unsigned int tid, unsigned int offset,
unsigned int length,
struct cxgbi_pagepod_hdr *hdr);
void cxgbi_ppm_ppod_release(struct cxgbi_ppm *, u32 idx);
int cxgbi_ppm_ppods_reserve(struct cxgbi_ppm *, unsigned short nr_pages,
u32 per_tag_pg_idx, u32 *ppod_idx, u32 *ddp_tag,
unsigned long caller_data);
int cxgbi_ppm_init(void **ppm_pp, struct net_device *, struct pci_dev *,
void *lldev, struct cxgbi_tag_format *,
unsigned int ppmax, unsigned int llimit,
unsigned int start,
unsigned int reserve_factor);
int cxgbi_ppm_release(struct cxgbi_ppm *ppm);
void cxgbi_tagmask_check(unsigned int tagmask, struct cxgbi_tag_format *);
unsigned int cxgbi_tagmask_set(unsigned int ppmax);
#endif /*__CXGB4PPM_H__*/

11
drivers/net/ethernet/chelsio/cxgb4/cxgb4_uld.h
Просмотреть файл

@ -191,6 +191,7 @@ static inline void set_wr_txq(struct sk_buff *skb, int prio, int queue)
enum cxgb4_uld {
CXGB4_ULD_RDMA,
CXGB4_ULD_ISCSI,
CXGB4_ULD_ISCSIT,
CXGB4_ULD_MAX
};
@ -212,6 +213,7 @@ struct l2t_data;
struct net_device;
struct pkt_gl;
struct tp_tcp_stats;
struct t4_lro_mgr;
struct cxgb4_range {
unsigned int start;
@ -273,6 +275,10 @@ struct cxgb4_lld_info {
unsigned int max_ordird_qp; /* Max ORD/IRD depth per RDMA QP */
unsigned int max_ird_adapter; /* Max IRD memory per adapter */
bool ulptx_memwrite_dsgl; /* use of T5 DSGL allowed */
unsigned int iscsi_tagmask; /* iscsi ddp tag mask */
unsigned int iscsi_pgsz_order; /* iscsi ddp page size orders */
unsigned int iscsi_llimit; /* chip's iscsi region llimit */
void **iscsi_ppm; /* iscsi page pod manager */
int nodeid; /* device numa node id */
};
@ -283,6 +289,11 @@ struct cxgb4_uld_info {
const struct pkt_gl *gl);
int (*state_change)(void *handle, enum cxgb4_state new_state);
int (*control)(void *handle, enum cxgb4_control control, ...);
int (*lro_rx_handler)(void *handle, const __be64 *rsp,
const struct pkt_gl *gl,
struct t4_lro_mgr *lro_mgr,
struct napi_struct *napi);
void (*lro_flush)(struct t4_lro_mgr *);
};
int cxgb4_register_uld(enum cxgb4_uld type, const struct cxgb4_uld_info *p);

2
drivers/net/ethernet/chelsio/cxgb4/l2t.c
Просмотреть файл

@ -48,8 +48,6 @@
#include "t4_regs.h"
#include "t4_values.h"
#define VLAN_NONE 0xfff
/* identifies sync vs async L2T_WRITE_REQs */
#define SYNC_WR_S 12
#define SYNC_WR_V(x) ((x) << SYNC_WR_S)

2
drivers/net/ethernet/chelsio/cxgb4/l2t.h
Просмотреть файл

@ -39,6 +39,8 @@
#include <linux/if_ether.h>
#include <linux/atomic.h>
#define VLAN_NONE 0xfff
enum { L2T_SIZE = 4096 }; /* # of L2T entries */
enum {

13
drivers/net/ethernet/chelsio/cxgb4/sge.c
Просмотреть файл

@ -2157,8 +2157,11 @@ static int process_responses(struct sge_rspq *q, int budget)
while (likely(budget_left)) {
rc = (void *)q->cur_desc + (q->iqe_len - sizeof(*rc));
if (!is_new_response(rc, q))
if (!is_new_response(rc, q)) {
if (q->flush_handler)
q->flush_handler(q);
break;
}
dma_rmb();
rsp_type = RSPD_TYPE_G(rc->type_gen);
@ -2544,7 +2547,8 @@ static void __iomem *bar2_address(struct adapter *adapter,
*/
int t4_sge_alloc_rxq(struct adapter *adap, struct sge_rspq *iq, bool fwevtq,
struct net_device *dev, int intr_idx,
struct sge_fl *fl, rspq_handler_t hnd, int cong)
struct sge_fl *fl, rspq_handler_t hnd,
rspq_flush_handler_t flush_hnd, int cong)
{
int ret, flsz = 0;
struct fw_iq_cmd c;
@ -2648,6 +2652,10 @@ int t4_sge_alloc_rxq(struct adapter *adap, struct sge_rspq *iq, bool fwevtq,
iq->size--; /* subtract status entry */
iq->netdev = dev;
iq->handler = hnd;
iq->flush_handler = flush_hnd;
memset(&iq->lro_mgr, 0, sizeof(struct t4_lro_mgr));
skb_queue_head_init(&iq->lro_mgr.lroq);
/* set offset to -1 to distinguish ingress queues without FL */
iq->offset = fl ? 0 : -1;
@ -2992,6 +3000,7 @@ void t4_free_sge_resources(struct adapter *adap)
/* clean up RDMA and iSCSI Rx queues */
t4_free_ofld_rxqs(adap, adap->sge.iscsiqsets, adap->sge.iscsirxq);
t4_free_ofld_rxqs(adap, adap->sge.niscsitq, adap->sge.iscsitrxq);
t4_free_ofld_rxqs(adap, adap->sge.rdmaqs, adap->sge.rdmarxq);
t4_free_ofld_rxqs(adap, adap->sge.rdmaciqs, adap->sge.rdmaciq);

217
drivers/net/ethernet/chelsio/cxgb4/t4_msg.h
Просмотреть файл

@ -51,6 +51,7 @@ enum {
CPL_TX_PKT = 0xE,
CPL_L2T_WRITE_REQ = 0x12,
CPL_TID_RELEASE = 0x1A,
CPL_TX_DATA_ISO = 0x1F,
CPL_CLOSE_LISTSRV_RPL = 0x20,
CPL_L2T_WRITE_RPL = 0x23,
@ -344,6 +345,87 @@ struct cpl_pass_open_rpl {
u8 status;
};
struct tcp_options {
__be16 mss;
__u8 wsf;
#if defined(__LITTLE_ENDIAN_BITFIELD)
__u8:4;
__u8 unknown:1;
__u8:1;
__u8 sack:1;
__u8 tstamp:1;
#else
__u8 tstamp:1;
__u8 sack:1;
__u8:1;
__u8 unknown:1;
__u8:4;
#endif
};
struct cpl_pass_accept_req {
union opcode_tid ot;
__be16 rsvd;
__be16 len;
__be32 hdr_len;
__be16 vlan;
__be16 l2info;
__be32 tos_stid;
struct tcp_options tcpopt;
};
/* cpl_pass_accept_req.hdr_len fields */
#define SYN_RX_CHAN_S 0
#define SYN_RX_CHAN_M 0xF
#define SYN_RX_CHAN_V(x) ((x) << SYN_RX_CHAN_S)
#define SYN_RX_CHAN_G(x) (((x) >> SYN_RX_CHAN_S) & SYN_RX_CHAN_M)
#define TCP_HDR_LEN_S 10
#define TCP_HDR_LEN_M 0x3F
#define TCP_HDR_LEN_V(x) ((x) << TCP_HDR_LEN_S)
#define TCP_HDR_LEN_G(x) (((x) >> TCP_HDR_LEN_S) & TCP_HDR_LEN_M)
#define IP_HDR_LEN_S 16
#define IP_HDR_LEN_M 0x3FF
#define IP_HDR_LEN_V(x) ((x) << IP_HDR_LEN_S)
#define IP_HDR_LEN_G(x) (((x) >> IP_HDR_LEN_S) & IP_HDR_LEN_M)
#define ETH_HDR_LEN_S 26
#define ETH_HDR_LEN_M 0x1F
#define ETH_HDR_LEN_V(x) ((x) << ETH_HDR_LEN_S)
#define ETH_HDR_LEN_G(x) (((x) >> ETH_HDR_LEN_S) & ETH_HDR_LEN_M)
/* cpl_pass_accept_req.l2info fields */
#define SYN_MAC_IDX_S 0
#define SYN_MAC_IDX_M 0x1FF
#define SYN_MAC_IDX_V(x) ((x) << SYN_MAC_IDX_S)
#define SYN_MAC_IDX_G(x) (((x) >> SYN_MAC_IDX_S) & SYN_MAC_IDX_M)
#define SYN_XACT_MATCH_S 9
#define SYN_XACT_MATCH_V(x) ((x) << SYN_XACT_MATCH_S)
#define SYN_XACT_MATCH_F SYN_XACT_MATCH_V(1U)
#define SYN_INTF_S 12
#define SYN_INTF_M 0xF
#define SYN_INTF_V(x) ((x) << SYN_INTF_S)
#define SYN_INTF_G(x) (((x) >> SYN_INTF_S) & SYN_INTF_M)
enum { /* TCP congestion control algorithms */
CONG_ALG_RENO,
CONG_ALG_TAHOE,
CONG_ALG_NEWRENO,
CONG_ALG_HIGHSPEED
};
#define CONG_CNTRL_S 14
#define CONG_CNTRL_M 0x3
#define CONG_CNTRL_V(x) ((x) << CONG_CNTRL_S)
#define CONG_CNTRL_G(x) (((x) >> CONG_CNTRL_S) & CONG_CNTRL_M)
#define T5_ISS_S 18
#define T5_ISS_V(x) ((x) << T5_ISS_S)
#define T5_ISS_F T5_ISS_V(1U)
struct cpl_pass_accept_rpl {
WR_HDR;
union opcode_tid ot;
@ -818,6 +900,110 @@ struct cpl_iscsi_hdr {
#define ISCSI_DDP_V(x) ((x) << ISCSI_DDP_S)
#define ISCSI_DDP_F ISCSI_DDP_V(1U)
struct cpl_rx_data_ddp {
union opcode_tid ot;
__be16 urg;
__be16 len;
__be32 seq;
union {
__be32 nxt_seq;
__be32 ddp_report;
};
__be32 ulp_crc;
__be32 ddpvld;
};
#define cpl_rx_iscsi_ddp cpl_rx_data_ddp
struct cpl_iscsi_data {
union opcode_tid ot;
__u8 rsvd0[2];
__be16 len;
__be32 seq;
__be16 urg;
__u8 rsvd1;
__u8 status;
};
struct cpl_tx_data_iso {
__be32 op_to_scsi;
__u8 reserved1;
__u8 ahs_len;
__be16 mpdu;
__be32 burst_size;
__be32 len;
__be32 reserved2_seglen_offset;
__be32 datasn_offset;
__be32 buffer_offset;
__be32 reserved3;
/* encapsulated CPL_TX_DATA follows here */
};
/* cpl_tx_data_iso.op_to_scsi fields */
#define CPL_TX_DATA_ISO_OP_S 24
#define CPL_TX_DATA_ISO_OP_M 0xff
#define CPL_TX_DATA_ISO_OP_V(x) ((x) << CPL_TX_DATA_ISO_OP_S)
#define CPL_TX_DATA_ISO_OP_G(x) \
(((x) >> CPL_TX_DATA_ISO_OP_S) & CPL_TX_DATA_ISO_OP_M)
#define CPL_TX_DATA_ISO_FIRST_S 23
#define CPL_TX_DATA_ISO_FIRST_M 0x1
#define CPL_TX_DATA_ISO_FIRST_V(x) ((x) << CPL_TX_DATA_ISO_FIRST_S)
#define CPL_TX_DATA_ISO_FIRST_G(x) \
(((x) >> CPL_TX_DATA_ISO_FIRST_S) & CPL_TX_DATA_ISO_FIRST_M)
#define CPL_TX_DATA_ISO_FIRST_F CPL_TX_DATA_ISO_FIRST_V(1U)
#define CPL_TX_DATA_ISO_LAST_S 22
#define CPL_TX_DATA_ISO_LAST_M 0x1
#define CPL_TX_DATA_ISO_LAST_V(x) ((x) << CPL_TX_DATA_ISO_LAST_S)
#define CPL_TX_DATA_ISO_LAST_G(x) \
(((x) >> CPL_TX_DATA_ISO_LAST_S) & CPL_TX_DATA_ISO_LAST_M)
#define CPL_TX_DATA_ISO_LAST_F CPL_TX_DATA_ISO_LAST_V(1U)
#define CPL_TX_DATA_ISO_CPLHDRLEN_S 21
#define CPL_TX_DATA_ISO_CPLHDRLEN_M 0x1
#define CPL_TX_DATA_ISO_CPLHDRLEN_V(x) ((x) << CPL_TX_DATA_ISO_CPLHDRLEN_S)
#define CPL_TX_DATA_ISO_CPLHDRLEN_G(x) \
(((x) >> CPL_TX_DATA_ISO_CPLHDRLEN_S) & CPL_TX_DATA_ISO_CPLHDRLEN_M)
#define CPL_TX_DATA_ISO_CPLHDRLEN_F CPL_TX_DATA_ISO_CPLHDRLEN_V(1U)
#define CPL_TX_DATA_ISO_HDRCRC_S 20
#define CPL_TX_DATA_ISO_HDRCRC_M 0x1
#define CPL_TX_DATA_ISO_HDRCRC_V(x) ((x) << CPL_TX_DATA_ISO_HDRCRC_S)
#define CPL_TX_DATA_ISO_HDRCRC_G(x) \
(((x) >> CPL_TX_DATA_ISO_HDRCRC_S) & CPL_TX_DATA_ISO_HDRCRC_M)
#define CPL_TX_DATA_ISO_HDRCRC_F CPL_TX_DATA_ISO_HDRCRC_V(1U)
#define CPL_TX_DATA_ISO_PLDCRC_S 19
#define CPL_TX_DATA_ISO_PLDCRC_M 0x1
#define CPL_TX_DATA_ISO_PLDCRC_V(x) ((x) << CPL_TX_DATA_ISO_PLDCRC_S)
#define CPL_TX_DATA_ISO_PLDCRC_G(x) \
(((x) >> CPL_TX_DATA_ISO_PLDCRC_S) & CPL_TX_DATA_ISO_PLDCRC_M)
#define CPL_TX_DATA_ISO_PLDCRC_F CPL_TX_DATA_ISO_PLDCRC_V(1U)
#define CPL_TX_DATA_ISO_IMMEDIATE_S 18
#define CPL_TX_DATA_ISO_IMMEDIATE_M 0x1
#define CPL_TX_DATA_ISO_IMMEDIATE_V(x) ((x) << CPL_TX_DATA_ISO_IMMEDIATE_S)
#define CPL_TX_DATA_ISO_IMMEDIATE_G(x) \
(((x) >> CPL_TX_DATA_ISO_IMMEDIATE_S) & CPL_TX_DATA_ISO_IMMEDIATE_M)
#define CPL_TX_DATA_ISO_IMMEDIATE_F CPL_TX_DATA_ISO_IMMEDIATE_V(1U)
#define CPL_TX_DATA_ISO_SCSI_S 16
#define CPL_TX_DATA_ISO_SCSI_M 0x3
#define CPL_TX_DATA_ISO_SCSI_V(x) ((x) << CPL_TX_DATA_ISO_SCSI_S)
#define CPL_TX_DATA_ISO_SCSI_G(x) \
(((x) >> CPL_TX_DATA_ISO_SCSI_S) & CPL_TX_DATA_ISO_SCSI_M)
/* cpl_tx_data_iso.reserved2_seglen_offset fields */
#define CPL_TX_DATA_ISO_SEGLEN_OFFSET_S 0
#define CPL_TX_DATA_ISO_SEGLEN_OFFSET_M 0xffffff
#define CPL_TX_DATA_ISO_SEGLEN_OFFSET_V(x) \
((x) << CPL_TX_DATA_ISO_SEGLEN_OFFSET_S)
#define CPL_TX_DATA_ISO_SEGLEN_OFFSET_G(x) \
(((x) >> CPL_TX_DATA_ISO_SEGLEN_OFFSET_S) & \
CPL_TX_DATA_ISO_SEGLEN_OFFSET_M)
struct cpl_rx_data {
union opcode_tid ot;
__be16 rsvd;
@ -854,6 +1040,15 @@ struct cpl_rx_data_ack {
#define RX_FORCE_ACK_V(x) ((x) << RX_FORCE_ACK_S)
#define RX_FORCE_ACK_F RX_FORCE_ACK_V(1U)
#define RX_DACK_MODE_S 29
#define RX_DACK_MODE_M 0x3
#define RX_DACK_MODE_V(x) ((x) << RX_DACK_MODE_S)
#define RX_DACK_MODE_G(x) (((x) >> RX_DACK_MODE_S) & RX_DACK_MODE_M)
#define RX_DACK_CHANGE_S 31
#define RX_DACK_CHANGE_V(x) ((x) << RX_DACK_CHANGE_S)
#define RX_DACK_CHANGE_F RX_DACK_CHANGE_V(1U)
struct cpl_rx_pkt {
struct rss_header rsshdr;
u8 opcode;
@ -1090,6 +1285,12 @@ struct cpl_fw4_ack {
__be64 rsvd1;
};
enum {
CPL_FW4_ACK_FLAGS_SEQVAL = 0x1, /* seqn valid */
CPL_FW4_ACK_FLAGS_CH = 0x2, /* channel change complete */
CPL_FW4_ACK_FLAGS_FLOWC = 0x4, /* fw_flowc_wr complete */
};
struct cpl_fw6_msg {
u8 opcode;
u8 type;
@ -1115,6 +1316,17 @@ struct cpl_fw6_msg_ofld_connection_wr_rpl {
__u8 rsvd[2];
};
struct cpl_tx_data {
union opcode_tid ot;
__be32 len;
__be32 rsvd;
__be32 flags;
};
/* cpl_tx_data.flags field */
#define TX_FORCE_S 13
#define TX_FORCE_V(x) ((x) << TX_FORCE_S)
enum {
ULP_TX_MEM_READ = 2,
ULP_TX_MEM_WRITE = 3,
@ -1143,6 +1355,11 @@ struct ulptx_sgl {
struct ulptx_sge_pair sge[0];
};
struct ulptx_idata {
__be32 cmd_more;
__be32 len;
};
#define ULPTX_NSGE_S 0
#define ULPTX_NSGE_V(x) ((x) << ULPTX_NSGE_S)

8
drivers/net/ethernet/chelsio/cxgb4/t4fw_api.h
Просмотреть файл

@ -101,6 +101,7 @@ enum fw_wr_opcodes {
FW_RI_BIND_MW_WR = 0x18,
FW_RI_FR_NSMR_WR = 0x19,
FW_RI_INV_LSTAG_WR = 0x1a,
FW_ISCSI_TX_DATA_WR = 0x45,
FW_LASTC2E_WR = 0x70
};
@ -561,7 +562,12 @@ enum fw_flowc_mnem {
FW_FLOWC_MNEM_SNDBUF,
FW_FLOWC_MNEM_MSS,
FW_FLOWC_MNEM_TXDATAPLEN_MAX,
FW_FLOWC_MNEM_SCHEDCLASS = 11,
FW_FLOWC_MNEM_TCPSTATE,
FW_FLOWC_MNEM_EOSTATE,
FW_FLOWC_MNEM_SCHEDCLASS,
FW_FLOWC_MNEM_DCBPRIO,
FW_FLOWC_MNEM_SND_SCALE,
FW_FLOWC_MNEM_RCV_SCALE,
};
struct fw_flowc_mnemval {

17
drivers/scsi/cxgbi/cxgb4i/cxgb4i.h
Просмотреть файл

@ -25,21 +25,4 @@
#define T5_ISS_VALID (1 << 18)
struct ulptx_idata {
__be32 cmd_more;
__be32 len;
};
struct cpl_rx_data_ddp {
union opcode_tid ot;
__be16 urg;
__be16 len;
__be32 seq;
union {
__be32 nxt_seq;
__be32 ddp_report;
};
__be32 ulp_crc;
__be32 ddpvld;
};
#endif /* __CXGB4I_H__ */