blob: 7a2fbb0db6e8ff942af595e76f55c6f8bf229c38 [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0+
/*
* TI K3 AM65x NAVSS Ring accelerator Manager (RA) subsystem driver
*
* Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com
*/
#include <common.h>
#include <cpu_func.h>
#include <log.h>
#include <asm/cache.h>
#include <asm/io.h>
#include <malloc.h>
#include <asm/bitops.h>
#include <dm.h>
#include <dm/device_compat.h>
#include <dm/devres.h>
#include <dm/read.h>
#include <dm/uclass.h>
#include <linux/bitops.h>
#include <linux/compat.h>
#include <linux/dma-mapping.h>
#include <linux/err.h>
#include <linux/printk.h>
#include <linux/soc/ti/k3-navss-ringacc.h>
#include <linux/soc/ti/ti_sci_protocol.h>
#include <linux/soc/ti/cppi5.h>
#define set_bit(bit, bitmap) __set_bit(bit, bitmap)
#define clear_bit(bit, bitmap) __clear_bit(bit, bitmap)
#define dma_free_coherent(dev, size, cpu_addr, dma_handle) \
dma_free_coherent(cpu_addr)
#define dma_zalloc_coherent(dev, size, dma_handle, flag) \
({ \
void *ring_mem_virt; \
ring_mem_virt = dma_alloc_coherent((size), \
(unsigned long *)(dma_handle)); \
if (ring_mem_virt) \
memset(ring_mem_virt, 0, (size)); \
ring_mem_virt; \
})
static LIST_HEAD(k3_nav_ringacc_list);
static void ringacc_writel(u32 v, void __iomem *reg)
{
pr_debug("WRITEL(32): v(%08X)-->reg(%p)\n", v, reg);
writel(v, reg);
}
static u32 ringacc_readl(void __iomem *reg)
{
u32 v;
v = readl(reg);
pr_debug("READL(32): v(%08X)<--reg(%p)\n", v, reg);
return v;
}
#define KNAV_RINGACC_CFG_RING_SIZE_ELCNT_MASK GENMASK(19, 0)
#define K3_DMARING_RING_CFG_RING_SIZE_ELCNT_MASK GENMASK(15, 0)
/**
* struct k3_nav_ring_rt_regs - The RA Control/Status Registers region
*/
struct k3_nav_ring_rt_regs {
u32 resv_16[4];
u32 db; /* RT Ring N Doorbell Register */
u32 resv_4[1];
u32 occ; /* RT Ring N Occupancy Register */
u32 indx; /* RT Ring N Current Index Register */
u32 hwocc; /* RT Ring N Hardware Occupancy Register */
u32 hwindx; /* RT Ring N Current Index Register */
};
#define KNAV_RINGACC_RT_REGS_STEP 0x1000
#define K3_DMARING_RING_RT_REGS_STEP 0x2000
#define K3_DMARING_RING_RT_REGS_REVERSE_OFS 0x1000
#define KNAV_RINGACC_RT_OCC_MASK GENMASK(20, 0)
#define K3_DMARING_RING_RT_OCC_TDOWN_COMPLETE BIT(31)
#define K3_DMARING_RING_RT_DB_ENTRY_MASK GENMASK(7, 0)
#define K3_DMARING_RING_RT_DB_TDOWN_ACK BIT(31)
/**
* struct k3_nav_ring_fifo_regs - The Ring Accelerator Queues Registers region
*/
struct k3_nav_ring_fifo_regs {
u32 head_data[128]; /* Ring Head Entry Data Registers */
u32 tail_data[128]; /* Ring Tail Entry Data Registers */
u32 peek_head_data[128]; /* Ring Peek Head Entry Data Regs */
u32 peek_tail_data[128]; /* Ring Peek Tail Entry Data Regs */
};
#define KNAV_RINGACC_FIFO_WINDOW_SIZE_BYTES (512U)
#define KNAV_RINGACC_FIFO_REGS_STEP 0x1000
#define KNAV_RINGACC_MAX_DB_RING_CNT (127U)
/**
* struct k3_nav_ring_ops - Ring operations
*/
struct k3_nav_ring_ops {
int (*push_tail)(struct k3_nav_ring *ring, void *elm);
int (*push_head)(struct k3_nav_ring *ring, void *elm);
int (*pop_tail)(struct k3_nav_ring *ring, void *elm);
int (*pop_head)(struct k3_nav_ring *ring, void *elm);
};
/**
* struct k3_nav_ring_state - Internal state tracking structure
*
* @free: Number of free entries
* @occ: Occupancy
* @windex: Write index
* @rindex: Read index
*/
struct k3_nav_ring_state {
u32 free;
u32 occ;
u32 windex;
u32 rindex;
u32 tdown_complete:1;
};
/**
* struct k3_nav_ring - RA Ring descriptor
*
* @cfg - Ring configuration registers
* @rt - Ring control/status registers
* @fifos - Ring queues registers
* @ring_mem_dma - Ring buffer dma address
* @ring_mem_virt - Ring buffer virt address
* @ops - Ring operations
* @size - Ring size in elements
* @elm_size - Size of the ring element
* @mode - Ring mode
* @flags - flags
* @ring_id - Ring Id
* @parent - Pointer on struct @k3_nav_ringacc
* @use_count - Use count for shared rings
*/
struct k3_nav_ring {
struct k3_nav_ring_cfg_regs __iomem *cfg;
struct k3_nav_ring_rt_regs __iomem *rt;
struct k3_nav_ring_fifo_regs __iomem *fifos;
dma_addr_t ring_mem_dma;
void *ring_mem_virt;
struct k3_nav_ring_ops *ops;
u32 size;
enum k3_nav_ring_size elm_size;
enum k3_nav_ring_mode mode;
u32 flags;
#define KNAV_RING_FLAG_BUSY BIT(1)
#define K3_NAV_RING_FLAG_SHARED BIT(2)
#define K3_NAV_RING_FLAG_REVERSE BIT(3)
struct k3_nav_ring_state state;
u32 ring_id;
struct k3_nav_ringacc *parent;
u32 use_count;
};
struct k3_nav_ringacc_ops {
int (*init)(struct udevice *dev, struct k3_nav_ringacc *ringacc);
};
/**
* struct k3_nav_ringacc - Rings accelerator descriptor
*
* @dev - pointer on RA device
* @num_rings - number of ring in RA
* @rm_gp_range - general purpose rings range from tisci
* @dma_ring_reset_quirk - DMA reset w/a enable
* @num_proxies - number of RA proxies
* @rings - array of rings descriptors (struct @k3_nav_ring)
* @list - list of RAs in the system
* @tisci - pointer ti-sci handle
* @tisci_ring_ops - ti-sci rings ops
* @tisci_dev_id - ti-sci device id
* @ops: SoC specific ringacc operation
* @dual_ring: indicate k3_dmaring dual ring support
*/
struct k3_nav_ringacc {
struct udevice *dev;
u32 num_rings; /* number of rings in Ringacc module */
unsigned long *rings_inuse;
struct ti_sci_resource *rm_gp_range;
bool dma_ring_reset_quirk;
u32 num_proxies;
struct k3_nav_ring *rings;
struct list_head list;
const struct ti_sci_handle *tisci;
const struct ti_sci_rm_ringacc_ops *tisci_ring_ops;
u32 tisci_dev_id;
const struct k3_nav_ringacc_ops *ops;
bool dual_ring;
};
#include "k3-navss-ringacc-u-boot.c"
static int k3_nav_ringacc_ring_read_occ(struct k3_nav_ring *ring)
{
return readl(&ring->rt->occ) & KNAV_RINGACC_RT_OCC_MASK;
}
static void k3_nav_ringacc_ring_update_occ(struct k3_nav_ring *ring)
{
u32 val;
val = readl(&ring->rt->occ);
ring->state.occ = val & KNAV_RINGACC_RT_OCC_MASK;
ring->state.tdown_complete = !!(val & K3_DMARING_RING_RT_OCC_TDOWN_COMPLETE);
}
static void *k3_nav_ringacc_get_elm_addr(struct k3_nav_ring *ring, u32 idx)
{
return (idx * (4 << ring->elm_size) + ring->ring_mem_virt);
}
static int k3_nav_ringacc_ring_push_mem(struct k3_nav_ring *ring, void *elem);
static int k3_nav_ringacc_ring_pop_mem(struct k3_nav_ring *ring, void *elem);
static int k3_dmaring_ring_fwd_pop_mem(struct k3_nav_ring *ring, void *elem);
static int k3_dmaring_ring_reverse_pop_mem(struct k3_nav_ring *ring, void *elem);
static struct k3_nav_ring_ops k3_nav_mode_ring_ops = {
.push_tail = k3_nav_ringacc_ring_push_mem,
.pop_head = k3_nav_ringacc_ring_pop_mem,
};
static struct k3_nav_ring_ops k3_dmaring_fwd_ring_ops = {
.push_tail = k3_nav_ringacc_ring_push_mem,
.pop_head = k3_dmaring_ring_fwd_pop_mem,
};
static struct k3_nav_ring_ops k3_dmaring_reverse_ring_ops = {
.pop_head = k3_dmaring_ring_reverse_pop_mem,
};
struct udevice *k3_nav_ringacc_get_dev(struct k3_nav_ringacc *ringacc)
{
return ringacc->dev;
}
struct k3_nav_ring *k3_nav_ringacc_request_ring(struct k3_nav_ringacc *ringacc,
int id)
{
if (id == K3_NAV_RINGACC_RING_ID_ANY) {
/* Request for any general purpose ring */
struct ti_sci_resource_desc *gp_rings =
&ringacc->rm_gp_range->desc[0];
unsigned long size;
size = gp_rings->start + gp_rings->num;
id = find_next_zero_bit(ringacc->rings_inuse,
size, gp_rings->start);
if (id == size)
goto error;
} else if (id < 0) {
goto error;
}
if (test_bit(id, ringacc->rings_inuse) &&
!(ringacc->rings[id].flags & K3_NAV_RING_FLAG_SHARED))
goto error;
else if (ringacc->rings[id].flags & K3_NAV_RING_FLAG_SHARED)
goto out;
if (!try_module_get(ringacc->dev->driver->owner))
goto error;
pr_debug("Giving ring#%d\n", id);
set_bit(id, ringacc->rings_inuse);
out:
ringacc->rings[id].use_count++;
return &ringacc->rings[id];
error:
return NULL;
}
static int k3_dmaring_ring_request_rings_pair(struct k3_nav_ringacc *ringacc,
int fwd_id, int compl_id,
struct k3_nav_ring **fwd_ring,
struct k3_nav_ring **compl_ring)
{
/* k3_dmaring: fwd_id == compl_id, so we ignore compl_id */
if (fwd_id < 0)
return -EINVAL;
if (test_bit(fwd_id, ringacc->rings_inuse))
return -EBUSY;
*fwd_ring = &ringacc->rings[fwd_id];
*compl_ring = &ringacc->rings[fwd_id + ringacc->num_rings];
set_bit(fwd_id, ringacc->rings_inuse);
ringacc->rings[fwd_id].use_count++;
dev_dbg(ringacc->dev, "Giving ring#%d\n", fwd_id);
return 0;
}
int k3_nav_ringacc_request_rings_pair(struct k3_nav_ringacc *ringacc,
int fwd_id, int compl_id,
struct k3_nav_ring **fwd_ring,
struct k3_nav_ring **compl_ring)
{
int ret = 0;
if (!fwd_ring || !compl_ring)
return -EINVAL;
if (ringacc->dual_ring)
return k3_dmaring_ring_request_rings_pair(ringacc, fwd_id, compl_id,
fwd_ring, compl_ring);
*fwd_ring = k3_nav_ringacc_request_ring(ringacc, fwd_id);
if (!(*fwd_ring))
return -ENODEV;
*compl_ring = k3_nav_ringacc_request_ring(ringacc, compl_id);
if (!(*compl_ring)) {
k3_nav_ringacc_ring_free(*fwd_ring);
ret = -ENODEV;
}
return ret;
}
static void k3_ringacc_ring_reset_sci(struct k3_nav_ring *ring)
{
struct k3_nav_ringacc *ringacc = ring->parent;
int ret;
if (IS_ENABLED(CONFIG_K3_DM_FW))
return k3_ringacc_ring_reset_raw(ring);
ret = ringacc->tisci_ring_ops->config(
ringacc->tisci,
TI_SCI_MSG_VALUE_RM_RING_COUNT_VALID,
ringacc->tisci_dev_id,
ring->ring_id,
0,
0,
ring->size,
0,
0,
0);
if (ret)
dev_err(ringacc->dev, "TISCI reset ring fail (%d) ring_idx %d\n",
ret, ring->ring_id);
}
void k3_nav_ringacc_ring_reset(struct k3_nav_ring *ring)
{
if (!ring || !(ring->flags & KNAV_RING_FLAG_BUSY))
return;
memset(&ring->state, 0, sizeof(ring->state));
k3_ringacc_ring_reset_sci(ring);
}
static void k3_ringacc_ring_reconfig_qmode_sci(struct k3_nav_ring *ring,
enum k3_nav_ring_mode mode)
{
struct k3_nav_ringacc *ringacc = ring->parent;
int ret;
if (IS_ENABLED(CONFIG_K3_DM_FW))
return k3_ringacc_ring_reconfig_qmode_raw(ring, mode);
ret = ringacc->tisci_ring_ops->config(
ringacc->tisci,
TI_SCI_MSG_VALUE_RM_RING_MODE_VALID,
ringacc->tisci_dev_id,
ring->ring_id,
0,
0,
0,
mode,
0,
0);
if (ret)
dev_err(ringacc->dev, "TISCI reconf qmode fail (%d) ring_idx %d\n",
ret, ring->ring_id);
}
void k3_nav_ringacc_ring_reset_dma(struct k3_nav_ring *ring, u32 occ)
{
if (!ring || !(ring->flags & KNAV_RING_FLAG_BUSY))
return;
if (!ring->parent->dma_ring_reset_quirk) {
k3_nav_ringacc_ring_reset(ring);
return;
}
if (!occ)
occ = ringacc_readl(&ring->rt->occ);
if (occ) {
u32 db_ring_cnt, db_ring_cnt_cur;
pr_debug("%s %u occ: %u\n", __func__,
ring->ring_id, occ);
/* 2. Reset the ring */
k3_ringacc_ring_reset_sci(ring);
/*
* 3. Setup the ring in ring/doorbell mode
* (if not already in this mode)
*/
if (ring->mode != K3_NAV_RINGACC_RING_MODE_RING)
k3_ringacc_ring_reconfig_qmode_sci(
ring, K3_NAV_RINGACC_RING_MODE_RING);
/*
* 4. Ring the doorbell 2**22 – ringOcc times.
* This will wrap the internal UDMAP ring state occupancy
* counter (which is 21-bits wide) to 0.
*/
db_ring_cnt = (1U << 22) - occ;
while (db_ring_cnt != 0) {
/*
* Ring the doorbell with the maximum count each
* iteration if possible to minimize the total
* of writes
*/
if (db_ring_cnt > KNAV_RINGACC_MAX_DB_RING_CNT)
db_ring_cnt_cur = KNAV_RINGACC_MAX_DB_RING_CNT;
else
db_ring_cnt_cur = db_ring_cnt;
writel(db_ring_cnt_cur, &ring->rt->db);
db_ring_cnt -= db_ring_cnt_cur;
}
/* 5. Restore the original ring mode (if not ring mode) */
if (ring->mode != K3_NAV_RINGACC_RING_MODE_RING)
k3_ringacc_ring_reconfig_qmode_sci(ring, ring->mode);
}
/* 2. Reset the ring */
k3_nav_ringacc_ring_reset(ring);
}
static void k3_ringacc_ring_free_sci(struct k3_nav_ring *ring)
{
struct k3_nav_ringacc *ringacc = ring->parent;
int ret;
if (IS_ENABLED(CONFIG_K3_DM_FW))
return k3_ringacc_ring_free_raw(ring);
ret = ringacc->tisci_ring_ops->config(
ringacc->tisci,
TI_SCI_MSG_VALUE_RM_ALL_NO_ORDER,
ringacc->tisci_dev_id,
ring->ring_id,
0,
0,
0,
0,
0,
0);
if (ret)
dev_err(ringacc->dev, "TISCI ring free fail (%d) ring_idx %d\n",
ret, ring->ring_id);
}
int k3_nav_ringacc_ring_free(struct k3_nav_ring *ring)
{
struct k3_nav_ringacc *ringacc;
if (!ring)
return -EINVAL;
ringacc = ring->parent;
/*
* k3_dmaring: rings shared memory and configuration, only forward ring is
* configured and reverse ring considered as slave.
*/
if (ringacc->dual_ring && (ring->flags & K3_NAV_RING_FLAG_REVERSE))
return 0;
pr_debug("%s flags: 0x%08x\n", __func__, ring->flags);
if (!test_bit(ring->ring_id, ringacc->rings_inuse))
return -EINVAL;
if (--ring->use_count)
goto out;
if (!(ring->flags & KNAV_RING_FLAG_BUSY))
goto no_init;
k3_ringacc_ring_free_sci(ring);
dma_free_coherent(ringacc->dev,
ring->size * (4 << ring->elm_size),
ring->ring_mem_virt, ring->ring_mem_dma);
ring->flags &= ~KNAV_RING_FLAG_BUSY;
ring->ops = NULL;
no_init:
clear_bit(ring->ring_id, ringacc->rings_inuse);
module_put(ringacc->dev->driver->owner);
out:
return 0;
}
u32 k3_nav_ringacc_get_ring_id(struct k3_nav_ring *ring)
{
if (!ring)
return -EINVAL;
return ring->ring_id;
}
static int k3_nav_ringacc_ring_cfg_sci(struct k3_nav_ring *ring)
{
struct k3_nav_ringacc *ringacc = ring->parent;
u32 ring_idx;
int ret;
if (!ringacc->tisci)
return -EINVAL;
ring_idx = ring->ring_id;
ret = ringacc->tisci_ring_ops->config(
ringacc->tisci,
TI_SCI_MSG_VALUE_RM_ALL_NO_ORDER,
ringacc->tisci_dev_id,
ring_idx,
lower_32_bits(ring->ring_mem_dma),
upper_32_bits(ring->ring_mem_dma),
ring->size,
ring->mode,
ring->elm_size,
0);
if (ret) {
dev_err(ringacc->dev, "TISCI config ring fail (%d) ring_idx %d\n",
ret, ring_idx);
return ret;
}
/*
* Above TI SCI call handles firewall configuration, cfg
* register configuration still has to be done locally in
* absence of RM services.
*/
if (IS_ENABLED(CONFIG_K3_DM_FW))
k3_nav_ringacc_ring_cfg_raw(ring);
return 0;
}
static int k3_dmaring_ring_cfg(struct k3_nav_ring *ring, struct k3_nav_ring_cfg *cfg)
{
struct k3_nav_ringacc *ringacc;
struct k3_nav_ring *reverse_ring;
int ret = 0;
if (cfg->elm_size != K3_NAV_RINGACC_RING_ELSIZE_8 ||
cfg->mode != K3_NAV_RINGACC_RING_MODE_RING ||
cfg->size & ~K3_DMARING_RING_CFG_RING_SIZE_ELCNT_MASK)
return -EINVAL;
ringacc = ring->parent;
/*
* k3_dmaring: rings shared memory and configuration, only forward ring is
* configured and reverse ring considered as slave.
*/
if (ringacc->dual_ring && (ring->flags & K3_NAV_RING_FLAG_REVERSE))
return 0;
if (!test_bit(ring->ring_id, ringacc->rings_inuse))
return -EINVAL;
ring->size = cfg->size;
ring->elm_size = cfg->elm_size;
ring->mode = cfg->mode;
memset(&ring->state, 0, sizeof(ring->state));
ring->ops = &k3_dmaring_fwd_ring_ops;
ring->ring_mem_virt =
dma_alloc_coherent(ring->size * (4 << ring->elm_size),
(unsigned long *)&ring->ring_mem_dma);
if (!ring->ring_mem_virt) {
dev_err(ringacc->dev, "Failed to alloc ring mem\n");
ret = -ENOMEM;
goto err_free_ops;
}
ret = k3_nav_ringacc_ring_cfg_sci(ring);
if (ret)
goto err_free_mem;
ring->flags |= KNAV_RING_FLAG_BUSY;
/* k3_dmaring: configure reverse ring */
reverse_ring = &ringacc->rings[ring->ring_id + ringacc->num_rings];
reverse_ring->size = cfg->size;
reverse_ring->elm_size = cfg->elm_size;
reverse_ring->mode = cfg->mode;
memset(&reverse_ring->state, 0, sizeof(reverse_ring->state));
reverse_ring->ops = &k3_dmaring_reverse_ring_ops;
reverse_ring->ring_mem_virt = ring->ring_mem_virt;
reverse_ring->ring_mem_dma = ring->ring_mem_dma;
reverse_ring->flags |= KNAV_RING_FLAG_BUSY;
return 0;
err_free_mem:
dma_free_coherent(ringacc->dev,
ring->size * (4 << ring->elm_size),
ring->ring_mem_virt,
ring->ring_mem_dma);
err_free_ops:
ring->ops = NULL;
return ret;
}
int k3_nav_ringacc_ring_cfg(struct k3_nav_ring *ring,
struct k3_nav_ring_cfg *cfg)
{
struct k3_nav_ringacc *ringacc = ring->parent;
int ret = 0;
if (!ring || !cfg)
return -EINVAL;
if (ringacc->dual_ring)
return k3_dmaring_ring_cfg(ring, cfg);
if (cfg->elm_size > K3_NAV_RINGACC_RING_ELSIZE_256 ||
cfg->mode > K3_NAV_RINGACC_RING_MODE_QM ||
cfg->size & ~KNAV_RINGACC_CFG_RING_SIZE_ELCNT_MASK ||
!test_bit(ring->ring_id, ringacc->rings_inuse))
return -EINVAL;
if (ring->use_count != 1)
return 0;
ring->size = cfg->size;
ring->elm_size = cfg->elm_size;
ring->mode = cfg->mode;
memset(&ring->state, 0, sizeof(ring->state));
switch (ring->mode) {
case K3_NAV_RINGACC_RING_MODE_RING:
ring->ops = &k3_nav_mode_ring_ops;
break;
default:
ring->ops = NULL;
ret = -EINVAL;
goto err_free_ops;
};
ring->ring_mem_virt =
dma_zalloc_coherent(ringacc->dev,
ring->size * (4 << ring->elm_size),
&ring->ring_mem_dma, GFP_KERNEL);
if (!ring->ring_mem_virt) {
dev_err(ringacc->dev, "Failed to alloc ring mem\n");
ret = -ENOMEM;
goto err_free_ops;
}
ret = k3_nav_ringacc_ring_cfg_sci(ring);
if (ret)
goto err_free_mem;
ring->flags |= KNAV_RING_FLAG_BUSY;
ring->flags |= (cfg->flags & K3_NAV_RINGACC_RING_SHARED) ?
K3_NAV_RING_FLAG_SHARED : 0;
return 0;
err_free_mem:
dma_free_coherent(ringacc->dev,
ring->size * (4 << ring->elm_size),
ring->ring_mem_virt,
ring->ring_mem_dma);
err_free_ops:
ring->ops = NULL;
return ret;
}
u32 k3_nav_ringacc_ring_get_size(struct k3_nav_ring *ring)
{
if (!ring || !(ring->flags & KNAV_RING_FLAG_BUSY))
return -EINVAL;
return ring->size;
}
u32 k3_nav_ringacc_ring_get_free(struct k3_nav_ring *ring)
{
if (!ring || !(ring->flags & KNAV_RING_FLAG_BUSY))
return -EINVAL;
if (!ring->state.free)
ring->state.free = ring->size - ringacc_readl(&ring->rt->occ);
return ring->state.free;
}
u32 k3_nav_ringacc_ring_get_occ(struct k3_nav_ring *ring)
{
if (!ring || !(ring->flags & KNAV_RING_FLAG_BUSY))
return -EINVAL;
return ringacc_readl(&ring->rt->occ);
}
u32 k3_nav_ringacc_ring_is_full(struct k3_nav_ring *ring)
{
return !k3_nav_ringacc_ring_get_free(ring);
}
enum k3_ringacc_access_mode {
K3_RINGACC_ACCESS_MODE_PUSH_HEAD,
K3_RINGACC_ACCESS_MODE_POP_HEAD,
K3_RINGACC_ACCESS_MODE_PUSH_TAIL,
K3_RINGACC_ACCESS_MODE_POP_TAIL,
K3_RINGACC_ACCESS_MODE_PEEK_HEAD,
K3_RINGACC_ACCESS_MODE_PEEK_TAIL,
};
static int k3_dmaring_ring_fwd_pop_mem(struct k3_nav_ring *ring, void *elem)
{
void *elem_ptr;
u32 elem_idx;
/*
* k3_dmaring: forward ring is always tied DMA channel and HW does not
* maintain any state data required for POP operation and its unknown
* how much elements were consumed by HW. So, to actually
* do POP, the read pointer has to be recalculated every time.
*/
ring->state.occ = k3_nav_ringacc_ring_read_occ(ring);
if (ring->state.windex >= ring->state.occ)
elem_idx = ring->state.windex - ring->state.occ;
else
elem_idx = ring->size - (ring->state.occ - ring->state.windex);
elem_ptr = k3_nav_ringacc_get_elm_addr(ring, elem_idx);
invalidate_dcache_range((unsigned long)ring->ring_mem_virt,
ALIGN((unsigned long)ring->ring_mem_virt +
ring->size * (4 << ring->elm_size),
ARCH_DMA_MINALIGN));
memcpy(elem, elem_ptr, (4 << ring->elm_size));
ring->state.occ--;
writel(-1, &ring->rt->db);
dev_dbg(ring->parent->dev, "%s: occ%d Windex%d Rindex%d pos_ptr%px\n",
__func__, ring->state.occ, ring->state.windex, elem_idx,
elem_ptr);
return 0;
}
static int k3_dmaring_ring_reverse_pop_mem(struct k3_nav_ring *ring, void *elem)
{
void *elem_ptr;
elem_ptr = k3_nav_ringacc_get_elm_addr(ring, ring->state.rindex);
if (ring->state.occ) {
invalidate_dcache_range((unsigned long)ring->ring_mem_virt,
ALIGN((unsigned long)ring->ring_mem_virt +
ring->size * (4 << ring->elm_size),
ARCH_DMA_MINALIGN));
memcpy(elem, elem_ptr, (4 << ring->elm_size));
ring->state.rindex = (ring->state.rindex + 1) % ring->size;
ring->state.occ--;
writel(-1 & K3_DMARING_RING_RT_DB_ENTRY_MASK, &ring->rt->db);
}
dev_dbg(ring->parent->dev, "%s: occ%d index%d pos_ptr%px\n",
__func__, ring->state.occ, ring->state.rindex, elem_ptr);
return 0;
}
static int k3_nav_ringacc_ring_push_mem(struct k3_nav_ring *ring, void *elem)
{
void *elem_ptr;
elem_ptr = k3_nav_ringacc_get_elm_addr(ring, ring->state.windex);
memcpy(elem_ptr, elem, (4 << ring->elm_size));
flush_dcache_range((unsigned long)ring->ring_mem_virt,
ALIGN((unsigned long)ring->ring_mem_virt +
ring->size * (4 << ring->elm_size),
ARCH_DMA_MINALIGN));
ring->state.windex = (ring->state.windex + 1) % ring->size;
ring->state.free--;
ringacc_writel(1, &ring->rt->db);
pr_debug("ring_push_mem: free%d index%d\n",
ring->state.free, ring->state.windex);
return 0;
}
static int k3_nav_ringacc_ring_pop_mem(struct k3_nav_ring *ring, void *elem)
{
void *elem_ptr;
elem_ptr = k3_nav_ringacc_get_elm_addr(ring, ring->state.rindex);
invalidate_dcache_range((unsigned long)ring->ring_mem_virt,
ALIGN((unsigned long)ring->ring_mem_virt +
ring->size * (4 << ring->elm_size),
ARCH_DMA_MINALIGN));
memcpy(elem, elem_ptr, (4 << ring->elm_size));
ring->state.rindex = (ring->state.rindex + 1) % ring->size;
ring->state.occ--;
ringacc_writel(-1, &ring->rt->db);
pr_debug("ring_pop_mem: occ%d index%d pos_ptr%p\n",
ring->state.occ, ring->state.rindex, elem_ptr);
return 0;
}
int k3_nav_ringacc_ring_push(struct k3_nav_ring *ring, void *elem)
{
int ret = -EOPNOTSUPP;
if (!ring || !(ring->flags & KNAV_RING_FLAG_BUSY))
return -EINVAL;
pr_debug("ring_push%d: free%d index%d\n",
ring->ring_id, ring->state.free, ring->state.windex);
if (k3_nav_ringacc_ring_is_full(ring))
return -ENOMEM;
if (ring->ops && ring->ops->push_tail)
ret = ring->ops->push_tail(ring, elem);
return ret;
}
int k3_nav_ringacc_ring_push_head(struct k3_nav_ring *ring, void *elem)
{
int ret = -EOPNOTSUPP;
if (!ring || !(ring->flags & KNAV_RING_FLAG_BUSY))
return -EINVAL;
pr_debug("ring_push_head: free%d index%d\n",
ring->state.free, ring->state.windex);
if (k3_nav_ringacc_ring_is_full(ring))
return -ENOMEM;
if (ring->ops && ring->ops->push_head)
ret = ring->ops->push_head(ring, elem);
return ret;
}
int k3_nav_ringacc_ring_pop(struct k3_nav_ring *ring, void *elem)
{
int ret = -EOPNOTSUPP;
if (!ring || !(ring->flags & KNAV_RING_FLAG_BUSY))
return -EINVAL;
if (!ring->state.occ)
k3_nav_ringacc_ring_update_occ(ring);
pr_debug("ring_pop%d: occ%d index%d\n",
ring->ring_id, ring->state.occ, ring->state.rindex);
if (!ring->state.occ && !ring->state.tdown_complete)
return -ENODATA;
if (ring->ops && ring->ops->pop_head)
ret = ring->ops->pop_head(ring, elem);
return ret;
}
int k3_nav_ringacc_ring_pop_tail(struct k3_nav_ring *ring, void *elem)
{
int ret = -EOPNOTSUPP;
if (!ring || !(ring->flags & KNAV_RING_FLAG_BUSY))
return -EINVAL;
if (!ring->state.occ)
k3_nav_ringacc_ring_update_occ(ring);
pr_debug("ring_pop_tail: occ%d index%d\n",
ring->state.occ, ring->state.rindex);
if (!ring->state.occ)
return -ENODATA;
if (ring->ops && ring->ops->pop_tail)
ret = ring->ops->pop_tail(ring, elem);
return ret;
}
static int k3_nav_ringacc_probe_dt(struct k3_nav_ringacc *ringacc)
{
struct udevice *dev = ringacc->dev;
struct udevice *devp = dev;
struct udevice *tisci_dev = NULL;
int ret;
ringacc->num_rings = dev_read_u32_default(dev, "ti,num-rings", 0);
if (!ringacc->num_rings) {
dev_err(dev, "ti,num-rings read failure %d\n", ret);
return -EINVAL;
}
ringacc->dma_ring_reset_quirk =
dev_read_bool(dev, "ti,dma-ring-reset-quirk");
ret = uclass_get_device_by_phandle(UCLASS_FIRMWARE, devp,
"ti,sci", &tisci_dev);
if (ret) {
pr_debug("TISCI RA RM get failed (%d)\n", ret);
ringacc->tisci = NULL;
return -ENODEV;
}
ringacc->tisci = (struct ti_sci_handle *)
(ti_sci_get_handle_from_sysfw(tisci_dev));
ret = dev_read_u32_default(devp, "ti,sci", 0);
if (!ret) {
dev_err(dev, "TISCI RA RM disabled\n");
ringacc->tisci = NULL;
return ret;
}
ret = dev_read_u32(devp, "ti,sci-dev-id", &ringacc->tisci_dev_id);
if (ret) {
dev_err(dev, "ti,sci-dev-id read failure %d\n", ret);
ringacc->tisci = NULL;
return ret;
}
ringacc->rm_gp_range = devm_ti_sci_get_of_resource(
ringacc->tisci, dev,
ringacc->tisci_dev_id,
"ti,sci-rm-range-gp-rings");
if (IS_ERR(ringacc->rm_gp_range))
ret = PTR_ERR(ringacc->rm_gp_range);
return 0;
}
static int k3_nav_ringacc_init(struct udevice *dev, struct k3_nav_ringacc *ringacc)
{
void __iomem *base_cfg, *base_rt;
int ret, i;
ret = k3_nav_ringacc_probe_dt(ringacc);
if (ret)
return ret;
base_cfg = dev_remap_addr_name(dev, "cfg");
pr_debug("cfg %p\n", base_cfg);
if (!base_cfg)
return -EINVAL;
base_rt = dev_read_addr_name_ptr(dev, "rt");
pr_debug("rt %p\n", base_rt);
if (!base_rt)
return -EINVAL;
ringacc->rings = devm_kzalloc(dev,
sizeof(*ringacc->rings) *
ringacc->num_rings,
GFP_KERNEL);
ringacc->rings_inuse = devm_kcalloc(dev,
BITS_TO_LONGS(ringacc->num_rings),
sizeof(unsigned long), GFP_KERNEL);
if (!ringacc->rings || !ringacc->rings_inuse)
return -ENOMEM;
for (i = 0; i < ringacc->num_rings; i++) {
ringacc->rings[i].cfg = base_cfg +
KNAV_RINGACC_CFG_REGS_STEP * i;
ringacc->rings[i].rt = base_rt +
KNAV_RINGACC_RT_REGS_STEP * i;
ringacc->rings[i].parent = ringacc;
ringacc->rings[i].ring_id = i;
}
dev_set_drvdata(dev, ringacc);
ringacc->tisci_ring_ops = &ringacc->tisci->ops.rm_ring_ops;
list_add_tail(&ringacc->list, &k3_nav_ringacc_list);
dev_info(dev, "Ring Accelerator probed rings:%u, gp-rings[%u,%u] sci-dev-id:%u\n",
ringacc->num_rings,
ringacc->rm_gp_range->desc[0].start,
ringacc->rm_gp_range->desc[0].num,
ringacc->tisci_dev_id);
dev_info(dev, "dma-ring-reset-quirk: %s\n",
ringacc->dma_ring_reset_quirk ? "enabled" : "disabled");
return 0;
}
struct k3_nav_ringacc *k3_ringacc_dmarings_init(struct udevice *dev,
struct k3_ringacc_init_data *data)
{
struct k3_nav_ringacc *ringacc;
void __iomem *base_rt;
int i;
ringacc = devm_kzalloc(dev, sizeof(*ringacc), GFP_KERNEL);
if (!ringacc)
return ERR_PTR(-ENOMEM);
ringacc->dual_ring = true;
ringacc->dev = dev;
ringacc->num_rings = data->num_rings;
ringacc->tisci = data->tisci;
ringacc->tisci_dev_id = data->tisci_dev_id;
base_rt = dev_read_addr_name_ptr(dev, "ringrt");
if (!base_rt)
return ERR_PTR(-EINVAL);
ringacc->rings = devm_kzalloc(dev,
sizeof(*ringacc->rings) *
ringacc->num_rings * 2,
GFP_KERNEL);
ringacc->rings_inuse = devm_kcalloc(dev,
BITS_TO_LONGS(ringacc->num_rings),
sizeof(unsigned long), GFP_KERNEL);
if (!ringacc->rings || !ringacc->rings_inuse)
return ERR_PTR(-ENOMEM);
for (i = 0; i < ringacc->num_rings; i++) {
struct k3_nav_ring *ring = &ringacc->rings[i];
ring->rt = base_rt + K3_DMARING_RING_RT_REGS_STEP * i;
ring->parent = ringacc;
ring->ring_id = i;
ring = &ringacc->rings[ringacc->num_rings + i];
ring->rt = base_rt + K3_DMARING_RING_RT_REGS_STEP * i +
K3_DMARING_RING_RT_REGS_REVERSE_OFS;
ring->parent = ringacc;
ring->ring_id = i;
ring->flags = K3_NAV_RING_FLAG_REVERSE;
}
ringacc->tisci_ring_ops = &ringacc->tisci->ops.rm_ring_ops;
dev_info(dev, "k3_dmaring Ring probed rings:%u, sci-dev-id:%u\n",
ringacc->num_rings,
ringacc->tisci_dev_id);
dev_info(dev, "dma-ring-reset-quirk: %s\n",
ringacc->dma_ring_reset_quirk ? "enabled" : "disabled");
return ringacc;
}
struct ringacc_match_data {
struct k3_nav_ringacc_ops ops;
};
static struct ringacc_match_data k3_nav_ringacc_data = {
.ops = {
.init = k3_nav_ringacc_init,
},
};
static const struct udevice_id knav_ringacc_ids[] = {
{ .compatible = "ti,am654-navss-ringacc", .data = (ulong)&k3_nav_ringacc_data, },
{},
};
static int k3_nav_ringacc_probe(struct udevice *dev)
{
struct k3_nav_ringacc *ringacc;
int ret;
const struct ringacc_match_data *match_data;
match_data = (struct ringacc_match_data *)dev_get_driver_data(dev);
ringacc = dev_get_priv(dev);
if (!ringacc)
return -ENOMEM;
ringacc->dev = dev;
ringacc->ops = &match_data->ops;
ret = ringacc->ops->init(dev, ringacc);
if (ret)
return ret;
return 0;
}
U_BOOT_DRIVER(k3_navss_ringacc) = {
.name = "k3-navss-ringacc",
.id = UCLASS_MISC,
.of_match = knav_ringacc_ids,
.probe = k3_nav_ringacc_probe,
.priv_auto = sizeof(struct k3_nav_ringacc),
};