mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-26 11:58:52 +09:00
![Prabhakar Kushwaha](/assets/img/avatar_default.png)
Update qbman driver - As per latest available qbman driver - Use of atomic APIs Signed-off-by: Prabhakar Kushwaha <prabhakar@freescale.com> CC: Geoff Thorpe <Geoff.Thorpe@freescale.com> CC: Haiying Wang <Haiying.Wang@freescale.com> CC: Roy Pledge <Roy.Pledge@freescale.com> Reviewed-by: York Sun <yorksun@freescale.com>
168 lines
6.0 KiB
C
168 lines
6.0 KiB
C
/*
|
|
* Copyright (C) 2014 Freescale Semiconductor
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include "qbman_private.h"
|
|
#include <fsl-mc/fsl_qbman_portal.h>
|
|
#include <fsl-mc/fsl_dpaa_fd.h>
|
|
|
|
/* All QBMan command and result structures use this "valid bit" encoding */
|
|
#define QB_VALID_BIT ((uint32_t)0x80)
|
|
|
|
/* Management command result codes */
|
|
#define QBMAN_MC_RSLT_OK 0xf0
|
|
|
|
/* TBD: as of QBMan 4.1, DQRR will be 8 rather than 4! */
|
|
#define QBMAN_DQRR_SIZE 4
|
|
|
|
|
|
/* --------------------- */
|
|
/* portal data structure */
|
|
/* --------------------- */
|
|
|
|
struct qbman_swp {
|
|
const struct qbman_swp_desc *desc;
|
|
/* The qbman_sys (ie. arch/OS-specific) support code can put anything it
|
|
* needs in here. */
|
|
struct qbman_swp_sys sys;
|
|
/* Management commands */
|
|
struct {
|
|
#ifdef QBMAN_CHECKING
|
|
enum swp_mc_check {
|
|
swp_mc_can_start, /* call __qbman_swp_mc_start() */
|
|
swp_mc_can_submit, /* call __qbman_swp_mc_submit() */
|
|
swp_mc_can_poll, /* call __qbman_swp_mc_result() */
|
|
} check;
|
|
#endif
|
|
uint32_t valid_bit; /* 0x00 or 0x80 */
|
|
} mc;
|
|
/* Push dequeues */
|
|
uint32_t sdq;
|
|
/* Volatile dequeues */
|
|
struct {
|
|
/* VDQCR supports a "1 deep pipeline", meaning that if you know
|
|
* the last-submitted command is already executing in the
|
|
* hardware (as evidenced by at least 1 valid dequeue result),
|
|
* you can write another dequeue command to the register, the
|
|
* hardware will start executing it as soon as the
|
|
* already-executing command terminates. (This minimises latency
|
|
* and stalls.) With that in mind, this "busy" variable refers
|
|
* to whether or not a command can be submitted, not whether or
|
|
* not a previously-submitted command is still executing. In
|
|
* other words, once proof is seen that the previously-submitted
|
|
* command is executing, "vdq" is no longer "busy".
|
|
*/
|
|
atomic_t busy;
|
|
uint32_t valid_bit; /* 0x00 or 0x80 */
|
|
/* We need to determine when vdq is no longer busy. This depends
|
|
* on whether the "busy" (last-submitted) dequeue command is
|
|
* targeting DQRR or main-memory, and detected is based on the
|
|
* presence of the dequeue command's "token" showing up in
|
|
* dequeue entries in DQRR or main-memory (respectively). Debug
|
|
* builds will, when submitting vdq commands, verify that the
|
|
* dequeue result location is not already equal to the command's
|
|
* token value. */
|
|
struct ldpaa_dq *storage; /* NULL if DQRR */
|
|
uint32_t token;
|
|
} vdq;
|
|
/* DQRR */
|
|
struct {
|
|
uint32_t next_idx;
|
|
uint32_t valid_bit;
|
|
} dqrr;
|
|
};
|
|
|
|
/* -------------------------- */
|
|
/* portal management commands */
|
|
/* -------------------------- */
|
|
|
|
/* Different management commands all use this common base layer of code to issue
|
|
* commands and poll for results. The first function returns a pointer to where
|
|
* the caller should fill in their MC command (though they should ignore the
|
|
* verb byte), the second function commits merges in the caller-supplied command
|
|
* verb (which should not include the valid-bit) and submits the command to
|
|
* hardware, and the third function checks for a completed response (returns
|
|
* non-NULL if only if the response is complete). */
|
|
void *qbman_swp_mc_start(struct qbman_swp *p);
|
|
void qbman_swp_mc_submit(struct qbman_swp *p, void *cmd, uint32_t cmd_verb);
|
|
void *qbman_swp_mc_result(struct qbman_swp *p);
|
|
|
|
/* Wraps up submit + poll-for-result */
|
|
static inline void *qbman_swp_mc_complete(struct qbman_swp *swp, void *cmd,
|
|
uint32_t cmd_verb)
|
|
{
|
|
int loopvar;
|
|
|
|
qbman_swp_mc_submit(swp, cmd, cmd_verb);
|
|
DBG_POLL_START(loopvar);
|
|
do {
|
|
DBG_POLL_CHECK(loopvar);
|
|
cmd = qbman_swp_mc_result(swp);
|
|
} while (!cmd);
|
|
return cmd;
|
|
}
|
|
|
|
/* ------------ */
|
|
/* qb_attr_code */
|
|
/* ------------ */
|
|
|
|
/* This struct locates a sub-field within a QBMan portal (CENA) cacheline which
|
|
* is either serving as a configuration command or a query result. The
|
|
* representation is inherently little-endian, as the indexing of the words is
|
|
* itself little-endian in nature and layerscape is little endian for anything
|
|
* that crosses a word boundary too (64-bit fields are the obvious examples).
|
|
*/
|
|
struct qb_attr_code {
|
|
unsigned int word; /* which uint32_t[] array member encodes the field */
|
|
unsigned int lsoffset; /* encoding offset from ls-bit */
|
|
unsigned int width; /* encoding width. (bool must be 1.) */
|
|
};
|
|
|
|
/* Macros to define codes */
|
|
#define QB_CODE(a, b, c) { a, b, c}
|
|
|
|
/* decode a field from a cacheline */
|
|
static inline uint32_t qb_attr_code_decode(const struct qb_attr_code *code,
|
|
const uint32_t *cacheline)
|
|
{
|
|
return d32_uint32_t(code->lsoffset, code->width, cacheline[code->word]);
|
|
}
|
|
|
|
|
|
/* encode a field to a cacheline */
|
|
static inline void qb_attr_code_encode(const struct qb_attr_code *code,
|
|
uint32_t *cacheline, uint32_t val)
|
|
{
|
|
cacheline[code->word] =
|
|
r32_uint32_t(code->lsoffset, code->width, cacheline[code->word])
|
|
| e32_uint32_t(code->lsoffset, code->width, val);
|
|
}
|
|
|
|
static inline void qb_attr_code_encode_64(const struct qb_attr_code *code,
|
|
uint64_t *cacheline, uint64_t val)
|
|
{
|
|
cacheline[code->word / 2] = val;
|
|
}
|
|
|
|
/* ---------------------- */
|
|
/* Descriptors/cachelines */
|
|
/* ---------------------- */
|
|
|
|
/* To avoid needless dynamic allocation, the driver API often gives the caller
|
|
* a "descriptor" type that the caller can instantiate however they like.
|
|
* Ultimately though, it is just a cacheline of binary storage (or something
|
|
* smaller when it is known that the descriptor doesn't need all 64 bytes) for
|
|
* holding pre-formatted pieces of hardware commands. The performance-critical
|
|
* code can then copy these descriptors directly into hardware command
|
|
* registers more efficiently than trying to construct/format commands
|
|
* on-the-fly. The API user sees the descriptor as an array of 32-bit words in
|
|
* order for the compiler to know its size, but the internal details are not
|
|
* exposed. The following macro is used within the driver for converting *any*
|
|
* descriptor pointer to a usable array pointer. The use of a macro (instead of
|
|
* an inline) is necessary to work with different descriptor types and to work
|
|
* correctly with const and non-const inputs (and similarly-qualified outputs).
|
|
*/
|
|
#define qb_cl(d) (&(d)->dont_manipulate_directly[0])
|