mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-18 15:36:46 +07:00
61f3cca8cd
Define an interface to return a system-wide unique id for a given VAS window. The vas_win_id() will be used in a follow-on patch to generate an unique handle for a user space receive window. Applications can use this handle to pair send and receive windows for fast thread-wakeup. The hardware refers to this system-wide unique id as a Partition Send Window ID which is expected to be used during fault handling. Hence the "pswid" in the function names. Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
181 lines
4.6 KiB
C
181 lines
4.6 KiB
C
/*
|
|
* Copyright 2016-17 IBM Corp.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the License, or (at your option) any later version.
|
|
*/
|
|
|
|
#ifndef _ASM_POWERPC_VAS_H
|
|
#define _ASM_POWERPC_VAS_H
|
|
|
|
struct vas_window;
|
|
|
|
/*
|
|
* Min and max FIFO sizes are based on Version 1.05 Section 3.1.4.25
|
|
* (Local FIFO Size Register) of the VAS workbook.
|
|
*/
|
|
#define VAS_RX_FIFO_SIZE_MIN (1 << 10) /* 1KB */
|
|
#define VAS_RX_FIFO_SIZE_MAX (8 << 20) /* 8MB */
|
|
|
|
/*
|
|
* Threshold Control Mode: Have paste operation fail if the number of
|
|
* requests in receive FIFO exceeds a threshold.
|
|
*
|
|
* NOTE: No special error code yet if paste is rejected because of these
|
|
* limits. So users can't distinguish between this and other errors.
|
|
*/
|
|
#define VAS_THRESH_DISABLED 0
|
|
#define VAS_THRESH_FIFO_GT_HALF_FULL 1
|
|
#define VAS_THRESH_FIFO_GT_QTR_FULL 2
|
|
#define VAS_THRESH_FIFO_GT_EIGHTH_FULL 3
|
|
|
|
/*
|
|
* Get/Set bit fields
|
|
*/
|
|
#define GET_FIELD(m, v) (((v) & (m)) >> MASK_LSH(m))
|
|
#define MASK_LSH(m) (__builtin_ffsl(m) - 1)
|
|
#define SET_FIELD(m, v, val) \
|
|
(((v) & ~(m)) | ((((typeof(v))(val)) << MASK_LSH(m)) & (m)))
|
|
|
|
/*
|
|
* Co-processor Engine type.
|
|
*/
|
|
enum vas_cop_type {
|
|
VAS_COP_TYPE_FAULT,
|
|
VAS_COP_TYPE_842,
|
|
VAS_COP_TYPE_842_HIPRI,
|
|
VAS_COP_TYPE_GZIP,
|
|
VAS_COP_TYPE_GZIP_HIPRI,
|
|
VAS_COP_TYPE_FTW,
|
|
VAS_COP_TYPE_MAX,
|
|
};
|
|
|
|
/*
|
|
* Receive window attributes specified by the (in-kernel) owner of window.
|
|
*/
|
|
struct vas_rx_win_attr {
|
|
void *rx_fifo;
|
|
int rx_fifo_size;
|
|
int wcreds_max;
|
|
|
|
bool pin_win;
|
|
bool rej_no_credit;
|
|
bool tx_wcred_mode;
|
|
bool rx_wcred_mode;
|
|
bool tx_win_ord_mode;
|
|
bool rx_win_ord_mode;
|
|
bool data_stamp;
|
|
bool nx_win;
|
|
bool fault_win;
|
|
bool user_win;
|
|
bool notify_disable;
|
|
bool intr_disable;
|
|
bool notify_early;
|
|
|
|
int lnotify_lpid;
|
|
int lnotify_pid;
|
|
int lnotify_tid;
|
|
u32 pswid;
|
|
|
|
int tc_mode;
|
|
};
|
|
|
|
/*
|
|
* Window attributes specified by the in-kernel owner of a send window.
|
|
*/
|
|
struct vas_tx_win_attr {
|
|
enum vas_cop_type cop;
|
|
int wcreds_max;
|
|
int lpid;
|
|
int pidr; /* hardware PID (from SPRN_PID) */
|
|
int pid; /* linux process id */
|
|
int pswid;
|
|
int rsvd_txbuf_count;
|
|
int tc_mode;
|
|
|
|
bool user_win;
|
|
bool pin_win;
|
|
bool rej_no_credit;
|
|
bool rsvd_txbuf_enable;
|
|
bool tx_wcred_mode;
|
|
bool rx_wcred_mode;
|
|
bool tx_win_ord_mode;
|
|
bool rx_win_ord_mode;
|
|
};
|
|
|
|
/*
|
|
* Helper to map a chip id to VAS id.
|
|
* For POWER9, this is a 1:1 mapping. In the future this maybe a 1:N
|
|
* mapping in which case, we will need to update this helper.
|
|
*
|
|
* Return the VAS id or -1 if no matching vasid is found.
|
|
*/
|
|
int chip_to_vas_id(int chipid);
|
|
|
|
/*
|
|
* Helper to initialize receive window attributes to defaults for an
|
|
* NX window.
|
|
*/
|
|
void vas_init_rx_win_attr(struct vas_rx_win_attr *rxattr, enum vas_cop_type cop);
|
|
|
|
/*
|
|
* Open a VAS receive window for the instance of VAS identified by @vasid
|
|
* Use @attr to initialize the attributes of the window.
|
|
*
|
|
* Return a handle to the window or ERR_PTR() on error.
|
|
*/
|
|
struct vas_window *vas_rx_win_open(int vasid, enum vas_cop_type cop,
|
|
struct vas_rx_win_attr *attr);
|
|
|
|
/*
|
|
* Helper to initialize send window attributes to defaults for an NX window.
|
|
*/
|
|
extern void vas_init_tx_win_attr(struct vas_tx_win_attr *txattr,
|
|
enum vas_cop_type cop);
|
|
|
|
/*
|
|
* Open a VAS send window for the instance of VAS identified by @vasid
|
|
* and the co-processor type @cop. Use @attr to initialize attributes
|
|
* of the window.
|
|
*
|
|
* Note: The instance of VAS must already have an open receive window for
|
|
* the coprocessor type @cop.
|
|
*
|
|
* Return a handle to the send window or ERR_PTR() on error.
|
|
*/
|
|
struct vas_window *vas_tx_win_open(int vasid, enum vas_cop_type cop,
|
|
struct vas_tx_win_attr *attr);
|
|
|
|
/*
|
|
* Close the send or receive window identified by @win. For receive windows
|
|
* return -EAGAIN if there are active send windows attached to this receive
|
|
* window.
|
|
*/
|
|
int vas_win_close(struct vas_window *win);
|
|
|
|
/*
|
|
* Copy the co-processor request block (CRB) @crb into the local L2 cache.
|
|
*/
|
|
int vas_copy_crb(void *crb, int offset);
|
|
|
|
/*
|
|
* Paste a previously copied CRB (see vas_copy_crb()) from the L2 cache to
|
|
* the hardware address associated with the window @win. @re is expected/
|
|
* assumed to be true for NX windows.
|
|
*/
|
|
int vas_paste_crb(struct vas_window *win, int offset, bool re);
|
|
|
|
/*
|
|
* Return a system-wide unique id for the VAS window @win.
|
|
*/
|
|
extern u32 vas_win_id(struct vas_window *win);
|
|
|
|
/*
|
|
* Return the power bus paste address associated with @win so the caller
|
|
* can map that address into their address space.
|
|
*/
|
|
extern u64 vas_win_paste_addr(struct vas_window *win);
|
|
#endif /* __ASM_POWERPC_VAS_H */
|