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OpenCloudOS-Kernel/drivers/soc/fsl/qbman/bman.c

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/* Copyright 2008 - 2016 Freescale Semiconductor, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of Freescale Semiconductor nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* ALTERNATIVELY, this software may be distributed under the terms of the
* GNU General Public License ("GPL") as published by the Free Software
* Foundation, either version 2 of that License or (at your option) any
* later version.
*
* THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "bman_priv.h"
#define IRQNAME "BMan portal %d"
#define MAX_IRQNAME 16 /* big enough for "BMan portal %d" */
/* Portal register assists */
#if defined(CONFIG_ARM) || defined(CONFIG_ARM64)
/* Cache-inhibited register offsets */
#define BM_REG_RCR_PI_CINH 0x3000
#define BM_REG_RCR_CI_CINH 0x3100
#define BM_REG_RCR_ITR 0x3200
#define BM_REG_CFG 0x3300
#define BM_REG_SCN(n) (0x3400 + ((n) << 6))
#define BM_REG_ISR 0x3e00
#define BM_REG_IER 0x3e40
#define BM_REG_ISDR 0x3e80
#define BM_REG_IIR 0x3ec0
/* Cache-enabled register offsets */
#define BM_CL_CR 0x0000
#define BM_CL_RR0 0x0100
#define BM_CL_RR1 0x0140
#define BM_CL_RCR 0x1000
#define BM_CL_RCR_PI_CENA 0x3000
#define BM_CL_RCR_CI_CENA 0x3100
#else
/* Cache-inhibited register offsets */
#define BM_REG_RCR_PI_CINH 0x0000
#define BM_REG_RCR_CI_CINH 0x0004
#define BM_REG_RCR_ITR 0x0008
#define BM_REG_CFG 0x0100
#define BM_REG_SCN(n) (0x0200 + ((n) << 2))
#define BM_REG_ISR 0x0e00
#define BM_REG_IER 0x0e04
#define BM_REG_ISDR 0x0e08
#define BM_REG_IIR 0x0e0c
/* Cache-enabled register offsets */
#define BM_CL_CR 0x0000
#define BM_CL_RR0 0x0100
#define BM_CL_RR1 0x0140
#define BM_CL_RCR 0x1000
#define BM_CL_RCR_PI_CENA 0x3000
#define BM_CL_RCR_CI_CENA 0x3100
#endif
/*
* Portal modes.
* Enum types;
* pmode == production mode
* cmode == consumption mode,
* Enum values use 3 letter codes. First letter matches the portal mode,
* remaining two letters indicate;
* ci == cache-inhibited portal register
* ce == cache-enabled portal register
* vb == in-band valid-bit (cache-enabled)
*/
enum bm_rcr_pmode { /* matches BCSP_CFG::RPM */
bm_rcr_pci = 0, /* PI index, cache-inhibited */
bm_rcr_pce = 1, /* PI index, cache-enabled */
bm_rcr_pvb = 2 /* valid-bit */
};
enum bm_rcr_cmode { /* s/w-only */
bm_rcr_cci, /* CI index, cache-inhibited */
bm_rcr_cce /* CI index, cache-enabled */
};
/* --- Portal structures --- */
#define BM_RCR_SIZE 8
/* Release Command */
struct bm_rcr_entry {
union {
struct {
u8 _ncw_verb; /* writes to this are non-coherent */
u8 bpid; /* used with BM_RCR_VERB_CMD_BPID_SINGLE */
u8 __reserved1[62];
};
struct bm_buffer bufs[8];
};
};
#define BM_RCR_VERB_VBIT 0x80
#define BM_RCR_VERB_CMD_MASK 0x70 /* one of two values; */
#define BM_RCR_VERB_CMD_BPID_SINGLE 0x20
#define BM_RCR_VERB_CMD_BPID_MULTI 0x30
#define BM_RCR_VERB_BUFCOUNT_MASK 0x0f /* values 1..8 */
struct bm_rcr {
struct bm_rcr_entry *ring, *cursor;
u8 ci, available, ithresh, vbit;
#ifdef CONFIG_FSL_DPAA_CHECKING
u32 busy;
enum bm_rcr_pmode pmode;
enum bm_rcr_cmode cmode;
#endif
};
/* MC (Management Command) command */
struct bm_mc_command {
u8 _ncw_verb; /* writes to this are non-coherent */
u8 bpid; /* used by acquire command */
u8 __reserved[62];
};
#define BM_MCC_VERB_VBIT 0x80
#define BM_MCC_VERB_CMD_MASK 0x70 /* where the verb contains; */
#define BM_MCC_VERB_CMD_ACQUIRE 0x10
#define BM_MCC_VERB_CMD_QUERY 0x40
#define BM_MCC_VERB_ACQUIRE_BUFCOUNT 0x0f /* values 1..8 go here */
/* MC result, Acquire and Query Response */
union bm_mc_result {
struct {
u8 verb;
u8 bpid;
u8 __reserved[62];
};
struct bm_buffer bufs[8];
};
#define BM_MCR_VERB_VBIT 0x80
#define BM_MCR_VERB_CMD_MASK BM_MCC_VERB_CMD_MASK
#define BM_MCR_VERB_CMD_ACQUIRE BM_MCC_VERB_CMD_ACQUIRE
#define BM_MCR_VERB_CMD_QUERY BM_MCC_VERB_CMD_QUERY
#define BM_MCR_VERB_CMD_ERR_INVALID 0x60
#define BM_MCR_VERB_CMD_ERR_ECC 0x70
#define BM_MCR_VERB_ACQUIRE_BUFCOUNT BM_MCC_VERB_ACQUIRE_BUFCOUNT /* 0..8 */
#define BM_MCR_TIMEOUT 10000 /* us */
struct bm_mc {
struct bm_mc_command *cr;
union bm_mc_result *rr;
u8 rridx, vbit;
#ifdef CONFIG_FSL_DPAA_CHECKING
enum {
/* Can only be _mc_start()ed */
mc_idle,
/* Can only be _mc_commit()ed or _mc_abort()ed */
mc_user,
/* Can only be _mc_retry()ed */
mc_hw
} state;
#endif
};
struct bm_addr {
void *ce; /* cache-enabled */
__be32 *ce_be; /* Same as above but for direct access */
void __iomem *ci; /* cache-inhibited */
};
struct bm_portal {
struct bm_addr addr;
struct bm_rcr rcr;
struct bm_mc mc;
} ____cacheline_aligned;
/* Cache-inhibited register access. */
static inline u32 bm_in(struct bm_portal *p, u32 offset)
{
return ioread32be(p->addr.ci + offset);
}
static inline void bm_out(struct bm_portal *p, u32 offset, u32 val)
{
iowrite32be(val, p->addr.ci + offset);
}
/* Cache Enabled Portal Access */
static inline void bm_cl_invalidate(struct bm_portal *p, u32 offset)
{
dpaa_invalidate(p->addr.ce + offset);
}
static inline void bm_cl_touch_ro(struct bm_portal *p, u32 offset)
{
dpaa_touch_ro(p->addr.ce + offset);
}
static inline u32 bm_ce_in(struct bm_portal *p, u32 offset)
{
return be32_to_cpu(*(p->addr.ce_be + (offset/4)));
}
struct bman_portal {
struct bm_portal p;
/* interrupt sources processed by portal_isr(), configurable */
unsigned long irq_sources;
/* probing time config params for cpu-affine portals */
const struct bm_portal_config *config;
char irqname[MAX_IRQNAME];
};
static cpumask_t affine_mask;
static DEFINE_SPINLOCK(affine_mask_lock);
static DEFINE_PER_CPU(struct bman_portal, bman_affine_portal);
static inline struct bman_portal *get_affine_portal(void)
{
return &get_cpu_var(bman_affine_portal);
}
static inline void put_affine_portal(void)
{
put_cpu_var(bman_affine_portal);
}
/*
* This object type refers to a pool, it isn't *the* pool. There may be
* more than one such object per BMan buffer pool, eg. if different users of the
* pool are operating via different portals.
*/
struct bman_pool {
/* index of the buffer pool to encapsulate (0-63) */
u32 bpid;
/* Used for hash-table admin when using depletion notifications. */
struct bman_portal *portal;
struct bman_pool *next;
};
static u32 poll_portal_slow(struct bman_portal *p, u32 is);
static irqreturn_t portal_isr(int irq, void *ptr)
{
struct bman_portal *p = ptr;
struct bm_portal *portal = &p->p;
u32 clear = p->irq_sources;
u32 is = bm_in(portal, BM_REG_ISR) & p->irq_sources;
if (unlikely(!is))
return IRQ_NONE;
clear |= poll_portal_slow(p, is);
bm_out(portal, BM_REG_ISR, clear);
return IRQ_HANDLED;
}
/* --- RCR API --- */
#define RCR_SHIFT ilog2(sizeof(struct bm_rcr_entry))
#define RCR_CARRY (uintptr_t)(BM_RCR_SIZE << RCR_SHIFT)
/* Bit-wise logic to wrap a ring pointer by clearing the "carry bit" */
static struct bm_rcr_entry *rcr_carryclear(struct bm_rcr_entry *p)
{
uintptr_t addr = (uintptr_t)p;
addr &= ~RCR_CARRY;
return (struct bm_rcr_entry *)addr;
}
#ifdef CONFIG_FSL_DPAA_CHECKING
/* Bit-wise logic to convert a ring pointer to a ring index */
static int rcr_ptr2idx(struct bm_rcr_entry *e)
{
return ((uintptr_t)e >> RCR_SHIFT) & (BM_RCR_SIZE - 1);
}
#endif
/* Increment the 'cursor' ring pointer, taking 'vbit' into account */
static inline void rcr_inc(struct bm_rcr *rcr)
{
/* increment to the next RCR pointer and handle overflow and 'vbit' */
struct bm_rcr_entry *partial = rcr->cursor + 1;
rcr->cursor = rcr_carryclear(partial);
if (partial != rcr->cursor)
rcr->vbit ^= BM_RCR_VERB_VBIT;
}
static int bm_rcr_get_avail(struct bm_portal *portal)
{
struct bm_rcr *rcr = &portal->rcr;
return rcr->available;
}
static int bm_rcr_get_fill(struct bm_portal *portal)
{
struct bm_rcr *rcr = &portal->rcr;
return BM_RCR_SIZE - 1 - rcr->available;
}
static void bm_rcr_set_ithresh(struct bm_portal *portal, u8 ithresh)
{
struct bm_rcr *rcr = &portal->rcr;
rcr->ithresh = ithresh;
bm_out(portal, BM_REG_RCR_ITR, ithresh);
}
static void bm_rcr_cce_prefetch(struct bm_portal *portal)
{
__maybe_unused struct bm_rcr *rcr = &portal->rcr;
DPAA_ASSERT(rcr->cmode == bm_rcr_cce);
bm_cl_touch_ro(portal, BM_CL_RCR_CI_CENA);
}
static u8 bm_rcr_cce_update(struct bm_portal *portal)
{
struct bm_rcr *rcr = &portal->rcr;
u8 diff, old_ci = rcr->ci;
DPAA_ASSERT(rcr->cmode == bm_rcr_cce);
rcr->ci = bm_ce_in(portal, BM_CL_RCR_CI_CENA) & (BM_RCR_SIZE - 1);
bm_cl_invalidate(portal, BM_CL_RCR_CI_CENA);
diff = dpaa_cyc_diff(BM_RCR_SIZE, old_ci, rcr->ci);
rcr->available += diff;
return diff;
}
static inline struct bm_rcr_entry *bm_rcr_start(struct bm_portal *portal)
{
struct bm_rcr *rcr = &portal->rcr;
DPAA_ASSERT(!rcr->busy);
if (!rcr->available)
return NULL;
#ifdef CONFIG_FSL_DPAA_CHECKING
rcr->busy = 1;
#endif
dpaa_zero(rcr->cursor);
return rcr->cursor;
}
static inline void bm_rcr_pvb_commit(struct bm_portal *portal, u8 myverb)
{
struct bm_rcr *rcr = &portal->rcr;
struct bm_rcr_entry *rcursor;
DPAA_ASSERT(rcr->busy);
DPAA_ASSERT(rcr->pmode == bm_rcr_pvb);
DPAA_ASSERT(rcr->available >= 1);
dma_wmb();
rcursor = rcr->cursor;
rcursor->_ncw_verb = myverb | rcr->vbit;
dpaa_flush(rcursor);
rcr_inc(rcr);
rcr->available--;
#ifdef CONFIG_FSL_DPAA_CHECKING
rcr->busy = 0;
#endif
}
static int bm_rcr_init(struct bm_portal *portal, enum bm_rcr_pmode pmode,
enum bm_rcr_cmode cmode)
{
struct bm_rcr *rcr = &portal->rcr;
u32 cfg;
u8 pi;
rcr->ring = portal->addr.ce + BM_CL_RCR;
rcr->ci = bm_in(portal, BM_REG_RCR_CI_CINH) & (BM_RCR_SIZE - 1);
pi = bm_in(portal, BM_REG_RCR_PI_CINH) & (BM_RCR_SIZE - 1);
rcr->cursor = rcr->ring + pi;
rcr->vbit = (bm_in(portal, BM_REG_RCR_PI_CINH) & BM_RCR_SIZE) ?
BM_RCR_VERB_VBIT : 0;
rcr->available = BM_RCR_SIZE - 1
- dpaa_cyc_diff(BM_RCR_SIZE, rcr->ci, pi);
rcr->ithresh = bm_in(portal, BM_REG_RCR_ITR);
#ifdef CONFIG_FSL_DPAA_CHECKING
rcr->busy = 0;
rcr->pmode = pmode;
rcr->cmode = cmode;
#endif
cfg = (bm_in(portal, BM_REG_CFG) & 0xffffffe0)
| (pmode & 0x3); /* BCSP_CFG::RPM */
bm_out(portal, BM_REG_CFG, cfg);
return 0;
}
static void bm_rcr_finish(struct bm_portal *portal)
{
#ifdef CONFIG_FSL_DPAA_CHECKING
struct bm_rcr *rcr = &portal->rcr;
int i;
DPAA_ASSERT(!rcr->busy);
i = bm_in(portal, BM_REG_RCR_PI_CINH) & (BM_RCR_SIZE - 1);
if (i != rcr_ptr2idx(rcr->cursor))
pr_crit("losing uncommitted RCR entries\n");
i = bm_in(portal, BM_REG_RCR_CI_CINH) & (BM_RCR_SIZE - 1);
if (i != rcr->ci)
pr_crit("missing existing RCR completions\n");
if (rcr->ci != rcr_ptr2idx(rcr->cursor))
pr_crit("RCR destroyed unquiesced\n");
#endif
}
/* --- Management command API --- */
static int bm_mc_init(struct bm_portal *portal)
{
struct bm_mc *mc = &portal->mc;
mc->cr = portal->addr.ce + BM_CL_CR;
mc->rr = portal->addr.ce + BM_CL_RR0;
mc->rridx = (mc->cr->_ncw_verb & BM_MCC_VERB_VBIT) ?
0 : 1;
mc->vbit = mc->rridx ? BM_MCC_VERB_VBIT : 0;
#ifdef CONFIG_FSL_DPAA_CHECKING
mc->state = mc_idle;
#endif
return 0;
}
static void bm_mc_finish(struct bm_portal *portal)
{
#ifdef CONFIG_FSL_DPAA_CHECKING
struct bm_mc *mc = &portal->mc;
DPAA_ASSERT(mc->state == mc_idle);
if (mc->state != mc_idle)
pr_crit("Losing incomplete MC command\n");
#endif
}
static inline struct bm_mc_command *bm_mc_start(struct bm_portal *portal)
{
struct bm_mc *mc = &portal->mc;
DPAA_ASSERT(mc->state == mc_idle);
#ifdef CONFIG_FSL_DPAA_CHECKING
mc->state = mc_user;
#endif
dpaa_zero(mc->cr);
return mc->cr;
}
static inline void bm_mc_commit(struct bm_portal *portal, u8 myverb)
{
struct bm_mc *mc = &portal->mc;
union bm_mc_result *rr = mc->rr + mc->rridx;
DPAA_ASSERT(mc->state == mc_user);
dma_wmb();
mc->cr->_ncw_verb = myverb | mc->vbit;
dpaa_flush(mc->cr);
dpaa_invalidate_touch_ro(rr);
#ifdef CONFIG_FSL_DPAA_CHECKING
mc->state = mc_hw;
#endif
}
static inline union bm_mc_result *bm_mc_result(struct bm_portal *portal)
{
struct bm_mc *mc = &portal->mc;
union bm_mc_result *rr = mc->rr + mc->rridx;
DPAA_ASSERT(mc->state == mc_hw);
/*
* The inactive response register's verb byte always returns zero until
* its command is submitted and completed. This includes the valid-bit,
* in case you were wondering...
*/
if (!rr->verb) {
dpaa_invalidate_touch_ro(rr);
return NULL;
}
mc->rridx ^= 1;
mc->vbit ^= BM_MCC_VERB_VBIT;
#ifdef CONFIG_FSL_DPAA_CHECKING
mc->state = mc_idle;
#endif
return rr;
}
static inline int bm_mc_result_timeout(struct bm_portal *portal,
union bm_mc_result **mcr)
{
int timeout = BM_MCR_TIMEOUT;
do {
*mcr = bm_mc_result(portal);
if (*mcr)
break;
udelay(1);
} while (--timeout);
return timeout;
}
/* Disable all BSCN interrupts for the portal */
static void bm_isr_bscn_disable(struct bm_portal *portal)
{
bm_out(portal, BM_REG_SCN(0), 0);
bm_out(portal, BM_REG_SCN(1), 0);
}
static int bman_create_portal(struct bman_portal *portal,
const struct bm_portal_config *c)
{
struct bm_portal *p;
int ret;
p = &portal->p;
/*
* prep the low-level portal struct with the mapped addresses from the
* config, everything that follows depends on it and "config" is more
* for (de)reference...
*/
p->addr.ce = c->addr_virt_ce;
p->addr.ce_be = c->addr_virt_ce;
p->addr.ci = c->addr_virt_ci;
if (bm_rcr_init(p, bm_rcr_pvb, bm_rcr_cce)) {
dev_err(c->dev, "RCR initialisation failed\n");
goto fail_rcr;
}
if (bm_mc_init(p)) {
dev_err(c->dev, "MC initialisation failed\n");
goto fail_mc;
}
/*
* Default to all BPIDs disabled, we enable as required at
* run-time.
*/
bm_isr_bscn_disable(p);
/* Write-to-clear any stale interrupt status bits */
bm_out(p, BM_REG_ISDR, 0xffffffff);
portal->irq_sources = 0;
bm_out(p, BM_REG_IER, 0);
bm_out(p, BM_REG_ISR, 0xffffffff);
snprintf(portal->irqname, MAX_IRQNAME, IRQNAME, c->cpu);
if (request_irq(c->irq, portal_isr, 0, portal->irqname, portal)) {
dev_err(c->dev, "request_irq() failed\n");
goto fail_irq;
}
if (dpaa_set_portal_irq_affinity(c->dev, c->irq, c->cpu))
goto fail_affinity;
/* Need RCR to be empty before continuing */
ret = bm_rcr_get_fill(p);
if (ret) {
dev_err(c->dev, "RCR unclean\n");
goto fail_rcr_empty;
}
/* Success */
portal->config = c;
bm_out(p, BM_REG_ISDR, 0);
bm_out(p, BM_REG_IIR, 0);
return 0;
fail_rcr_empty:
fail_affinity:
free_irq(c->irq, portal);
fail_irq:
bm_mc_finish(p);
fail_mc:
bm_rcr_finish(p);
fail_rcr:
return -EIO;
}
struct bman_portal *bman_create_affine_portal(const struct bm_portal_config *c)
{
struct bman_portal *portal;
int err;
portal = &per_cpu(bman_affine_portal, c->cpu);
err = bman_create_portal(portal, c);
if (err)
return NULL;
spin_lock(&affine_mask_lock);
cpumask_set_cpu(c->cpu, &affine_mask);
spin_unlock(&affine_mask_lock);
return portal;
}
static u32 poll_portal_slow(struct bman_portal *p, u32 is)
{
u32 ret = is;
if (is & BM_PIRQ_RCRI) {
bm_rcr_cce_update(&p->p);
bm_rcr_set_ithresh(&p->p, 0);
bm_out(&p->p, BM_REG_ISR, BM_PIRQ_RCRI);
is &= ~BM_PIRQ_RCRI;
}
/* There should be no status register bits left undefined */
DPAA_ASSERT(!is);
return ret;
}
int bman_p_irqsource_add(struct bman_portal *p, u32 bits)
{
unsigned long irqflags;
local_irq_save(irqflags);
p->irq_sources |= bits & BM_PIRQ_VISIBLE;
bm_out(&p->p, BM_REG_IER, p->irq_sources);
local_irq_restore(irqflags);
return 0;
}
int bm_shutdown_pool(u32 bpid)
{
int err = 0;
struct bm_mc_command *bm_cmd;
union bm_mc_result *bm_res;
struct bman_portal *p = get_affine_portal();
while (1) {
/* Acquire buffers until empty */
bm_cmd = bm_mc_start(&p->p);
bm_cmd->bpid = bpid;
bm_mc_commit(&p->p, BM_MCC_VERB_CMD_ACQUIRE | 1);
if (!bm_mc_result_timeout(&p->p, &bm_res)) {
pr_crit("BMan Acquire Command timedout\n");
err = -ETIMEDOUT;
goto done;
}
if (!(bm_res->verb & BM_MCR_VERB_ACQUIRE_BUFCOUNT)) {
/* Pool is empty */
goto done;
}
}
done:
put_affine_portal();
return err;
}
struct gen_pool *bm_bpalloc;
static int bm_alloc_bpid_range(u32 *result, u32 count)
{
unsigned long addr;
addr = gen_pool_alloc(bm_bpalloc, count);
if (!addr)
return -ENOMEM;
*result = addr & ~DPAA_GENALLOC_OFF;
return 0;
}
static int bm_release_bpid(u32 bpid)
{
int ret;
ret = bm_shutdown_pool(bpid);
if (ret) {
pr_debug("BPID %d leaked\n", bpid);
return ret;
}
gen_pool_free(bm_bpalloc, bpid | DPAA_GENALLOC_OFF, 1);
return 0;
}
struct bman_pool *bman_new_pool(void)
{
struct bman_pool *pool = NULL;
u32 bpid;
if (bm_alloc_bpid_range(&bpid, 1))
return NULL;
pool = kmalloc(sizeof(*pool), GFP_KERNEL);
if (!pool)
goto err;
pool->bpid = bpid;
return pool;
err:
bm_release_bpid(bpid);
kfree(pool);
return NULL;
}
EXPORT_SYMBOL(bman_new_pool);
void bman_free_pool(struct bman_pool *pool)
{
bm_release_bpid(pool->bpid);
kfree(pool);
}
EXPORT_SYMBOL(bman_free_pool);
int bman_get_bpid(const struct bman_pool *pool)
{
return pool->bpid;
}
EXPORT_SYMBOL(bman_get_bpid);
static void update_rcr_ci(struct bman_portal *p, int avail)
{
if (avail)
bm_rcr_cce_prefetch(&p->p);
else
bm_rcr_cce_update(&p->p);
}
int bman_release(struct bman_pool *pool, const struct bm_buffer *bufs, u8 num)
{
struct bman_portal *p;
struct bm_rcr_entry *r;
unsigned long irqflags;
int avail, timeout = 1000; /* 1ms */
int i = num - 1;
DPAA_ASSERT(num > 0 && num <= 8);
do {
p = get_affine_portal();
local_irq_save(irqflags);
avail = bm_rcr_get_avail(&p->p);
if (avail < 2)
update_rcr_ci(p, avail);
r = bm_rcr_start(&p->p);
local_irq_restore(irqflags);
put_affine_portal();
if (likely(r))
break;
udelay(1);
} while (--timeout);
if (unlikely(!timeout))
return -ETIMEDOUT;
p = get_affine_portal();
local_irq_save(irqflags);
/*
* we can copy all but the first entry, as this can trigger badness
* with the valid-bit
*/
bm_buffer_set64(r->bufs, bm_buffer_get64(bufs));
bm_buffer_set_bpid(r->bufs, pool->bpid);
if (i)
memcpy(&r->bufs[1], &bufs[1], i * sizeof(bufs[0]));
bm_rcr_pvb_commit(&p->p, BM_RCR_VERB_CMD_BPID_SINGLE |
(num & BM_RCR_VERB_BUFCOUNT_MASK));
local_irq_restore(irqflags);
put_affine_portal();
return 0;
}
EXPORT_SYMBOL(bman_release);
int bman_acquire(struct bman_pool *pool, struct bm_buffer *bufs, u8 num)
{
struct bman_portal *p = get_affine_portal();
struct bm_mc_command *mcc;
union bm_mc_result *mcr;
int ret;
DPAA_ASSERT(num > 0 && num <= 8);
mcc = bm_mc_start(&p->p);
mcc->bpid = pool->bpid;
bm_mc_commit(&p->p, BM_MCC_VERB_CMD_ACQUIRE |
(num & BM_MCC_VERB_ACQUIRE_BUFCOUNT));
if (!bm_mc_result_timeout(&p->p, &mcr)) {
put_affine_portal();
pr_crit("BMan Acquire Timeout\n");
return -ETIMEDOUT;
}
ret = mcr->verb & BM_MCR_VERB_ACQUIRE_BUFCOUNT;
if (bufs)
memcpy(&bufs[0], &mcr->bufs[0], num * sizeof(bufs[0]));
put_affine_portal();
if (ret != num)
ret = -ENOMEM;
return ret;
}
EXPORT_SYMBOL(bman_acquire);
const struct bm_portal_config *
bman_get_bm_portal_config(const struct bman_portal *portal)
{
return portal->config;
}
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