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linux/drivers/s390/cio/qdio.h
Linus Torvalds 386403a115 Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next 
Pull networking updates from David Miller:
 "Another merge window, another pull full of stuff:

   1) Support alternative names for network devices, from Jiri Pirko.

   2) Introduce per-netns netdev notifiers, also from Jiri Pirko.

   3) Support MSG_PEEK in vsock/virtio, from Matias Ezequiel Vara
      Larsen.

   4) Allow compiling out the TLS TOE code, from Jakub Kicinski.

   5) Add several new tracepoints to the kTLS code, also from Jakub.

   6) Support set channels ethtool callback in ena driver, from Sameeh
      Jubran.

   7) New SCTP events SCTP_ADDR_ADDED, SCTP_ADDR_REMOVED,
      SCTP_ADDR_MADE_PRIM, and SCTP_SEND_FAILED_EVENT. From Xin Long.

   8) Add XDP support to mvneta driver, from Lorenzo Bianconi.

   9) Lots of netfilter hw offload fixes, cleanups and enhancements,
      from Pablo Neira Ayuso.

  10) PTP support for aquantia chips, from Egor Pomozov.

  11) Add UDP segmentation offload support to igb, ixgbe, and i40e. From
      Josh Hunt.

  12) Add smart nagle to tipc, from Jon Maloy.

  13) Support L2 field rewrite by TC offloads in bnxt_en, from Venkat
      Duvvuru.

  14) Add a flow mask cache to OVS, from Tonghao Zhang.

  15) Add XDP support to ice driver, from Maciej Fijalkowski.

  16) Add AF_XDP support to ice driver, from Krzysztof Kazimierczak.

  17) Support UDP GSO offload in atlantic driver, from Igor Russkikh.

  18) Support it in stmmac driver too, from Jose Abreu.

  19) Support TIPC encryption and auth, from Tuong Lien.

  20) Introduce BPF trampolines, from Alexei Starovoitov.

  21) Make page_pool API more numa friendly, from Saeed Mahameed.

  22) Introduce route hints to ipv4 and ipv6, from Paolo Abeni.

  23) Add UDP segmentation offload to cxgb4, Rahul Lakkireddy"

* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1857 commits)
  libbpf: Fix usage of u32 in userspace code
  mm: Implement no-MMU variant of vmalloc_user_node_flags
  slip: Fix use-after-free Read in slip_open
  net: dsa: sja1105: fix sja1105_parse_rgmii_delays()
  macvlan: schedule bc_work even if error
  enetc: add support Credit Based Shaper(CBS) for hardware offload
  net: phy: add helpers phy_(un)lock_mdio_bus
  mdio_bus: don't use managed reset-controller
  ax88179_178a: add ethtool_op_get_ts_info()
  mlxsw: spectrum_router: Fix use of uninitialized adjacency index
  mlxsw: spectrum_router: After underlay moves, demote conflicting tunnels
  bpf: Simplify __bpf_arch_text_poke poke type handling
  bpf: Introduce BPF_TRACE_x helper for the tracing tests
  bpf: Add bpf_jit_blinding_enabled for !CONFIG_BPF_JIT
  bpf, testing: Add various tail call test cases
  bpf, x86: Emit patchable direct jump as tail call
  bpf: Constant map key tracking for prog array pokes
  bpf: Add poke dependency tracking for prog array maps
  bpf: Add initial poke descriptor table for jit images
  bpf: Move owner type, jited info into array auxiliary data
  ...
2019-11-25 20:02:57 -08:00

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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright IBM Corp. 2000, 2009
* Author(s): Utz Bacher <utz.bacher@de.ibm.com>
* Jan Glauber <jang@linux.vnet.ibm.com>
*/
#ifndef _CIO_QDIO_H
#define _CIO_QDIO_H
#include <asm/page.h>
#include <asm/schid.h>
#include <asm/debug.h>
#include "chsc.h"
#define QDIO_BUSY_BIT_PATIENCE (100 << 12) /* 100 microseconds */
#define QDIO_BUSY_BIT_RETRY_DELAY 10 /* 10 milliseconds */
#define QDIO_BUSY_BIT_RETRIES 1000 /* = 10s retry time */
#define QDIO_INPUT_THRESHOLD (500 << 12) /* 500 microseconds */
enum qdio_irq_states {
QDIO_IRQ_STATE_INACTIVE,
QDIO_IRQ_STATE_ESTABLISHED,
QDIO_IRQ_STATE_ACTIVE,
QDIO_IRQ_STATE_STOPPED,
QDIO_IRQ_STATE_CLEANUP,
QDIO_IRQ_STATE_ERR,
NR_QDIO_IRQ_STATES,
};
/* used as intparm in do_IO */
#define QDIO_DOING_ESTABLISH 1
#define QDIO_DOING_ACTIVATE 2
#define QDIO_DOING_CLEANUP 3
#define SLSB_STATE_NOT_INIT 0x0
#define SLSB_STATE_EMPTY 0x1
#define SLSB_STATE_PRIMED 0x2
#define SLSB_STATE_PENDING 0x3
#define SLSB_STATE_HALTED 0xe
#define SLSB_STATE_ERROR 0xf
#define SLSB_TYPE_INPUT 0x0
#define SLSB_TYPE_OUTPUT 0x20
#define SLSB_OWNER_PROG 0x80
#define SLSB_OWNER_CU 0x40
#define SLSB_P_INPUT_NOT_INIT \
(SLSB_OWNER_PROG | SLSB_TYPE_INPUT | SLSB_STATE_NOT_INIT) /* 0x80 */
#define SLSB_P_INPUT_ACK \
(SLSB_OWNER_PROG | SLSB_TYPE_INPUT | SLSB_STATE_EMPTY) /* 0x81 */
#define SLSB_CU_INPUT_EMPTY \
(SLSB_OWNER_CU | SLSB_TYPE_INPUT | SLSB_STATE_EMPTY) /* 0x41 */
#define SLSB_P_INPUT_PRIMED \
(SLSB_OWNER_PROG | SLSB_TYPE_INPUT | SLSB_STATE_PRIMED) /* 0x82 */
#define SLSB_P_INPUT_HALTED \
(SLSB_OWNER_PROG | SLSB_TYPE_INPUT | SLSB_STATE_HALTED) /* 0x8e */
#define SLSB_P_INPUT_ERROR \
(SLSB_OWNER_PROG | SLSB_TYPE_INPUT | SLSB_STATE_ERROR) /* 0x8f */
#define SLSB_P_OUTPUT_NOT_INIT \
(SLSB_OWNER_PROG | SLSB_TYPE_OUTPUT | SLSB_STATE_NOT_INIT) /* 0xa0 */
#define SLSB_P_OUTPUT_EMPTY \
(SLSB_OWNER_PROG | SLSB_TYPE_OUTPUT | SLSB_STATE_EMPTY) /* 0xa1 */
#define SLSB_P_OUTPUT_PENDING \
(SLSB_OWNER_PROG | SLSB_TYPE_OUTPUT | SLSB_STATE_PENDING) /* 0xa3 */
#define SLSB_CU_OUTPUT_PRIMED \
(SLSB_OWNER_CU | SLSB_TYPE_OUTPUT | SLSB_STATE_PRIMED) /* 0x62 */
#define SLSB_P_OUTPUT_HALTED \
(SLSB_OWNER_PROG | SLSB_TYPE_OUTPUT | SLSB_STATE_HALTED) /* 0xae */
#define SLSB_P_OUTPUT_ERROR \
(SLSB_OWNER_PROG | SLSB_TYPE_OUTPUT | SLSB_STATE_ERROR) /* 0xaf */
#define SLSB_ERROR_DURING_LOOKUP 0xff
/* additional CIWs returned by extended Sense-ID */
#define CIW_TYPE_EQUEUE 0x3 /* establish QDIO queues */
#define CIW_TYPE_AQUEUE 0x4 /* activate QDIO queues */
/* flags for st qdio sch data */
#define CHSC_FLAG_QDIO_CAPABILITY 0x80
#define CHSC_FLAG_VALIDITY 0x40
/* SIGA flags */
#define QDIO_SIGA_WRITE 0x00
#define QDIO_SIGA_READ 0x01
#define QDIO_SIGA_SYNC 0x02
#define QDIO_SIGA_WRITEM 0x03
#define QDIO_SIGA_WRITEQ 0x04
#define QDIO_SIGA_QEBSM_FLAG 0x80
static inline int do_sqbs(u64 token, unsigned char state, int queue,
int *start, int *count)
{
register unsigned long _ccq asm ("0") = *count;
register unsigned long _token asm ("1") = token;
unsigned long _queuestart = ((unsigned long)queue << 32) | *start;
asm volatile(
" .insn rsy,0xeb000000008A,%1,0,0(%2)"
: "+d" (_ccq), "+d" (_queuestart)
: "d" ((unsigned long)state), "d" (_token)
: "memory", "cc");
*count = _ccq & 0xff;
*start = _queuestart & 0xff;
return (_ccq >> 32) & 0xff;
}
static inline int do_eqbs(u64 token, unsigned char *state, int queue,
int *start, int *count, int ack)
{
register unsigned long _ccq asm ("0") = *count;
register unsigned long _token asm ("1") = token;
unsigned long _queuestart = ((unsigned long)queue << 32) | *start;
unsigned long _state = (unsigned long)ack << 63;
asm volatile(
" .insn rrf,0xB99c0000,%1,%2,0,0"
: "+d" (_ccq), "+d" (_queuestart), "+d" (_state)
: "d" (_token)
: "memory", "cc");
*count = _ccq & 0xff;
*start = _queuestart & 0xff;
*state = _state & 0xff;
return (_ccq >> 32) & 0xff;
}
struct qdio_irq;
struct siga_flag {
u8 input:1;
u8 output:1;
u8 sync:1;
u8 sync_after_ai:1;
u8 sync_out_after_pci:1;
u8:3;
} __attribute__ ((packed));
struct qdio_dev_perf_stat {
unsigned int adapter_int;
unsigned int qdio_int;
unsigned int pci_request_int;
unsigned int tasklet_inbound;
unsigned int tasklet_inbound_resched;
unsigned int tasklet_inbound_resched2;
unsigned int tasklet_outbound;
unsigned int siga_read;
unsigned int siga_write;
unsigned int siga_sync;
unsigned int inbound_call;
unsigned int inbound_handler;
unsigned int stop_polling;
unsigned int inbound_queue_full;
unsigned int outbound_call;
unsigned int outbound_handler;
unsigned int outbound_queue_full;
unsigned int fast_requeue;
unsigned int target_full;
unsigned int eqbs;
unsigned int eqbs_partial;
unsigned int sqbs;
unsigned int sqbs_partial;
unsigned int int_discarded;
} ____cacheline_aligned;
struct qdio_queue_perf_stat {
/*
* Sorted into order-2 buckets: 1, 2-3, 4-7, ... 64-127, 128.
* Since max. 127 SBALs are scanned reuse entry for 128 as queue full
* aka 127 SBALs found.
*/
unsigned int nr_sbals[8];
unsigned int nr_sbal_error;
unsigned int nr_sbal_nop;
unsigned int nr_sbal_total;
};
enum qdio_queue_irq_states {
QDIO_QUEUE_IRQS_DISABLED,
};
struct qdio_input_q {
/* input buffer acknowledgement flag */
int polling;
/* first ACK'ed buffer */
int ack_start;
/* how much sbals are acknowledged with qebsm */
int ack_count;
/* last time of noticing incoming data */
u64 timestamp;
/* upper-layer polling flag */
unsigned long queue_irq_state;
/* callback to start upper-layer polling */
void (*queue_start_poll) (struct ccw_device *, int, unsigned long);
};
struct qdio_output_q {
/* PCIs are enabled for the queue */
int pci_out_enabled;
/* cq: use asynchronous output buffers */
int use_cq;
/* cq: aobs used for particual SBAL */
struct qaob **aobs;
/* cq: sbal state related to asynchronous operation */
struct qdio_outbuf_state *sbal_state;
/* timer to check for more outbound work */
struct timer_list timer;
};
/*
* Note on cache alignment: grouped slsb and write mostly data at the beginning
* sbal[] is read-only and starts on a new cacheline followed by read mostly.
*/
struct qdio_q {
struct slsb slsb;
union {
struct qdio_input_q in;
struct qdio_output_q out;
} u;
/*
* inbound: next buffer the program should check for
* outbound: next buffer to check if adapter processed it
*/
int first_to_check;
/* beginning position for calling the program */
int first_to_kick;
/* number of buffers in use by the adapter */
atomic_t nr_buf_used;
/* error condition during a data transfer */
unsigned int qdio_error;
/* last scan of the queue */
u64 timestamp;
struct tasklet_struct tasklet;
struct qdio_queue_perf_stat q_stats;
struct qdio_buffer *sbal[QDIO_MAX_BUFFERS_PER_Q] ____cacheline_aligned;
/* queue number */
int nr;
/* bitmask of queue number */
int mask;
/* input or output queue */
int is_input_q;
/* upper-layer program handler */
qdio_handler_t (*handler);
struct dentry *debugfs_q;
struct qdio_irq *irq_ptr;
struct sl *sl;
/*
* A page is allocated under this pointer and used for slib and sl.
* slib is 2048 bytes big and sl points to offset PAGE_SIZE / 2.
*/
struct slib *slib;
} __attribute__ ((aligned(256)));
struct qdio_irq {
struct qib qib;
u32 *dsci; /* address of device state change indicator */
struct ccw_device *cdev;
struct list_head entry; /* list of thinint devices */
struct dentry *debugfs_dev;
struct dentry *debugfs_perf;
unsigned long int_parm;
struct subchannel_id schid;
unsigned long sch_token; /* QEBSM facility */
enum qdio_irq_states state;
struct siga_flag siga_flag; /* siga sync information from qdioac */
int nr_input_qs;
int nr_output_qs;
struct ccw1 ccw;
struct ciw equeue;
struct ciw aqueue;
struct qdio_ssqd_desc ssqd_desc;
void (*orig_handler) (struct ccw_device *, unsigned long, struct irb *);
unsigned int scan_threshold; /* used SBALs before tasklet schedule */
int perf_stat_enabled;
struct qdr *qdr;
unsigned long chsc_page;
struct qdio_q *input_qs[QDIO_MAX_QUEUES_PER_IRQ];
struct qdio_q *output_qs[QDIO_MAX_QUEUES_PER_IRQ];
debug_info_t *debug_area;
struct mutex setup_mutex;
struct qdio_dev_perf_stat perf_stat;
};
/* helper functions */
#define queue_type(q) q->irq_ptr->qib.qfmt
#define SCH_NO(q) (q->irq_ptr->schid.sch_no)
#define is_thinint_irq(irq) \
(irq->qib.qfmt == QDIO_IQDIO_QFMT || \
css_general_characteristics.aif_osa)
#define qperf(__qdev, __attr) ((__qdev)->perf_stat.(__attr))
#define QDIO_PERF_STAT_INC(__irq, __attr) \
({ \
struct qdio_irq *qdev = __irq; \
if (qdev->perf_stat_enabled) \
(qdev->perf_stat.__attr)++; \
})
#define qperf_inc(__q, __attr) QDIO_PERF_STAT_INC((__q)->irq_ptr, __attr)
static inline void account_sbals_error(struct qdio_q *q, int count)
{
q->q_stats.nr_sbal_error += count;
q->q_stats.nr_sbal_total += count;
}
/* the highest iqdio queue is used for multicast */
static inline int multicast_outbound(struct qdio_q *q)
{
return (q->irq_ptr->nr_output_qs > 1) &&
(q->nr == q->irq_ptr->nr_output_qs - 1);
}
#define pci_out_supported(irq) ((irq)->qib.ac & QIB_AC_OUTBOUND_PCI_SUPPORTED)
#define is_qebsm(q) (q->irq_ptr->sch_token != 0)
#define need_siga_in(q) (q->irq_ptr->siga_flag.input)
#define need_siga_out(q) (q->irq_ptr->siga_flag.output)
#define need_siga_sync(q) (unlikely(q->irq_ptr->siga_flag.sync))
#define need_siga_sync_after_ai(q) \
(unlikely(q->irq_ptr->siga_flag.sync_after_ai))
#define need_siga_sync_out_after_pci(q) \
(unlikely(q->irq_ptr->siga_flag.sync_out_after_pci))
#define for_each_input_queue(irq_ptr, q, i) \
for (i = 0; i < irq_ptr->nr_input_qs && \
({ q = irq_ptr->input_qs[i]; 1; }); i++)
#define for_each_output_queue(irq_ptr, q, i) \
for (i = 0; i < irq_ptr->nr_output_qs && \
({ q = irq_ptr->output_qs[i]; 1; }); i++)
#define add_buf(bufnr, inc) QDIO_BUFNR((bufnr) + (inc))
#define next_buf(bufnr) add_buf(bufnr, 1)
#define sub_buf(bufnr, dec) QDIO_BUFNR((bufnr) - (dec))
#define prev_buf(bufnr) sub_buf(bufnr, 1)
#define queue_irqs_enabled(q) \
(test_bit(QDIO_QUEUE_IRQS_DISABLED, &q->u.in.queue_irq_state) == 0)
#define queue_irqs_disabled(q) \
(test_bit(QDIO_QUEUE_IRQS_DISABLED, &q->u.in.queue_irq_state) != 0)
extern u64 last_ai_time;
/* prototypes for thin interrupt */
void qdio_setup_thinint(struct qdio_irq *irq_ptr);
int qdio_establish_thinint(struct qdio_irq *irq_ptr);
void qdio_shutdown_thinint(struct qdio_irq *irq_ptr);
void tiqdio_add_device(struct qdio_irq *irq_ptr);
void tiqdio_remove_device(struct qdio_irq *irq_ptr);
void tiqdio_inbound_processing(unsigned long q);
int tiqdio_allocate_memory(void);
void tiqdio_free_memory(void);
int tiqdio_register_thinints(void);
void tiqdio_unregister_thinints(void);
void clear_nonshared_ind(struct qdio_irq *);
int test_nonshared_ind(struct qdio_irq *);
/* prototypes for setup */
void qdio_inbound_processing(unsigned long data);
void qdio_outbound_processing(unsigned long data);
void qdio_outbound_timer(struct timer_list *t);
void qdio_int_handler(struct ccw_device *cdev, unsigned long intparm,
struct irb *irb);
int qdio_allocate_qs(struct qdio_irq *irq_ptr, int nr_input_qs,
int nr_output_qs);
void qdio_setup_ssqd_info(struct qdio_irq *irq_ptr);
int qdio_setup_get_ssqd(struct qdio_irq *irq_ptr,
struct subchannel_id *schid,
struct qdio_ssqd_desc *data);
int qdio_setup_irq(struct qdio_initialize *init_data);
void qdio_print_subchannel_info(struct qdio_irq *irq_ptr,
struct ccw_device *cdev);
void qdio_release_memory(struct qdio_irq *irq_ptr);
int qdio_setup_create_sysfs(struct ccw_device *cdev);
void qdio_setup_destroy_sysfs(struct ccw_device *cdev);
int qdio_setup_init(void);
void qdio_setup_exit(void);
int qdio_enable_async_operation(struct qdio_output_q *q);
void qdio_disable_async_operation(struct qdio_output_q *q);
struct qaob *qdio_allocate_aob(void);
int debug_get_buf_state(struct qdio_q *q, unsigned int bufnr,
unsigned char *state);
#endif /* _CIO_QDIO_H */
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