// SPDX-License-Identifier: GPL-2.0
/*
* TI K3 NAVSS Ring Accelerator subsystem driver
*
* Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com
*/
#include <linux/dma-mapping.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/sys_soc.h>
#include <linux/dma/ti-cppi5.h>
#include <linux/soc/ti/k3-ringacc.h>
#include <linux/soc/ti/ti_sci_protocol.h>
#include <linux/soc/ti/ti_sci_inta_msi.h>
#include <linux/of_irq.h>
#include <linux/irqdomain.h>
static LIST_HEAD(k3_ringacc_list);
static DEFINE_MUTEX(k3_ringacc_list_lock);
#define K3_RINGACC_CFG_RING_SIZE_ELCNT_MASK GENMASK(19, 0)
#define K3_DMARING_CFG_RING_SIZE_ELCNT_MASK GENMASK(15, 0)
/**
* struct k3_ring_rt_regs - The RA realtime Control/Status Registers region
*
* @resv_16: Reserved
* @db: Ring Doorbell Register
* @resv_4: Reserved
* @occ: Ring Occupancy Register
* @indx: Ring Current Index Register
* @hwocc: Ring Hardware Occupancy Register
* @hwindx: Ring Hardware Current Index Register
*/
struct k3_ring_rt_regs {
u32 resv_16[4];
u32 db;
u32 resv_4[1];
u32 occ;
u32 indx;
u32 hwocc;
u32 hwindx;
};
#define K3_RINGACC_RT_REGS_STEP 0x1000
#define K3_DMARING_RT_REGS_STEP 0x2000
#define K3_DMARING_RT_REGS_REVERSE_OFS 0x1000
#define K3_RINGACC_RT_OCC_MASK GENMASK(20, 0)
#define K3_DMARING_RT_OCC_TDOWN_COMPLETE BIT(31)
#define K3_DMARING_RT_DB_ENTRY_MASK GENMASK(7, 0)
#define K3_DMARING_RT_DB_TDOWN_ACK BIT(31)
/**
* struct k3_ring_fifo_regs - The Ring Accelerator Queues Registers region
*
* @head_data: Ring Head Entry Data Registers
* @tail_data: Ring Tail Entry Data Registers
* @peek_head_data: Ring Peek Head Entry Data Regs
* @peek_tail_data: Ring Peek Tail Entry Data Regs
*/
struct k3_ring_fifo_regs {
u32 head_data[128];
u32 tail_data[128];
u32 peek_head_data[128];
u32 peek_tail_data[128];
};
/**
* struct k3_ringacc_proxy_gcfg_regs - RA Proxy Global Config MMIO Region
*
* @revision: Revision Register
* @config: Config Register
*/
struct k3_ringacc_proxy_gcfg_regs {
u32 revision;
u32 config;
};
#define K3_RINGACC_PROXY_CFG_THREADS_MASK GENMASK(15, 0)
/**
* struct k3_ringacc_proxy_target_regs - Proxy Datapath MMIO Region
*
* @control: Proxy Control Register
* @status: Proxy Status Register
* @resv_512: Reserved
* @data: Proxy Data Register
*/
struct k3_ringacc_proxy_target_regs {
u32 control;
u32 status;
u8 resv_512[504];
u32 data[128];
};
#define K3_RINGACC_PROXY_TARGET_STEP 0x1000
#define K3_RINGACC_PROXY_NOT_USED (-1)
enum k3_ringacc_proxy_access_mode {
PROXY_ACCESS_MODE_HEAD = 0,
PROXY_ACCESS_MODE_TAIL = 1,
PROXY_ACCESS_MODE_PEEK_HEAD = 2,
PROXY_ACCESS_MODE_PEEK_TAIL = 3,
};
#define K3_RINGACC_FIFO_WINDOW_SIZE_BYTES (512U)
#define K3_RINGACC_FIFO_REGS_STEP 0x1000
#define K3_RINGACC_MAX_DB_RING_CNT (127U)
struct k3_ring_ops {
int (*push_tail)(struct k3_ring *ring, void *elm);
int (*push_head)(struct k3_ring *ring, void *elm);
int (*pop_tail)(struct k3_ring *ring, void *elm);
int (*pop_head)(struct k3_ring *ring, void *elm);
};
/**
* struct k3_ring_state - Internal state tracking structure
*
* @free: Number of free entries
* @occ: Occupancy
* @windex: Write index
* @rindex: Read index
* @tdown_complete: Tear down complete state
*/
struct k3_ring_state {
u32 free;
u32 occ;
u32 windex;
u32 rindex;
u32 tdown_complete:1;
};
/**
* struct k3_ring - RA Ring descriptor
*
* @rt: Ring control/status registers
* @fifos: Ring queues registers
* @proxy: Ring Proxy Datapath 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
* @state: Ring state
* @ring_id: Ring Id
* @parent: Pointer on struct @k3_ringacc
* @use_count: Use count for shared rings
* @proxy_id: RA Ring Proxy Id (only if @K3_RINGACC_RING_USE_PROXY)
* @dma_dev: device to be used for DMA API (allocation, mapping)
* @asel: Address Space Select value for physical addresses
*/
struct k3_ring {
struct k3_ring_rt_regs __iomem *rt;
struct k3_ring_fifo_regs __iomem *fifos;
struct k3_ringacc_proxy_target_regs __iomem *proxy;
dma_addr_t ring_mem_dma;
void *ring_mem_virt;
struct k3_ring_ops *ops;
u32 size;
enum k3_ring_size elm_size;
enum k3_ring_mode mode;
u32 flags;
#define K3_RING_FLAG_BUSY BIT(1)
#define K3_RING_FLAG_SHARED BIT(2)
#define K3_RING_FLAG_REVERSE BIT(3)
struct k3_ring_state state;
u32 ring_id;
struct k3_ringacc *parent;
u32 use_count;
int proxy_id;
struct device *dma_dev;
u32 asel;
#define K3_ADDRESS_ASEL_SHIFT 48
};
struct k3_ringacc_ops {
int (*init)(struct platform_device *pdev, struct k3_ringacc *ringacc);
};
/**
* struct k3_ringacc - Rings accelerator descriptor
*
* @dev: pointer on RA device
* @proxy_gcfg: RA proxy global config registers
* @proxy_target_base: RA proxy datapath region
* @num_rings: number of ring in RA
* @rings_inuse: bitfield for ring usage tracking
* @rm_gp_range: general purpose rings range from tisci
* @dma_ring_reset_quirk: DMA reset workaround enable
* @num_proxies: number of RA proxies
* @proxy_inuse: bitfield for proxy usage tracking
* @rings: array of rings descriptors (struct @k3_ring)
* @list: list of RAs in the system
* @req_lock: protect rings allocation
* @tisci: pointer ti-sci handle
* @tisci_ring_ops: ti-sci rings ops
* @tisci_dev_id: ti-sci device id
* @ops: SoC specific ringacc operation
* @dma_rings: indicate DMA ring (dual ring within BCDMA/PKTDMA)
*/
struct k3_ringacc {
struct device *dev;
struct k3_ringacc_proxy_gcfg_regs __iomem *proxy_gcfg;
void __iomem *proxy_target_base;
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;
unsigned long *proxy_inuse;
struct k3_ring *rings;
struct list_head list;
struct mutex req_lock; /* protect rings allocation */
const struct ti_sci_handle *tisci;
const struct ti_sci_rm_ringacc_ops *tisci_ring_ops;
u32 tisci_dev_id;
const struct k3_ringacc_ops *ops;
bool dma_rings;
};
/**
* struct k3_ringacc_soc_data - Rings accelerator SoC data
*
* @dma_ring_reset_quirk: DMA reset workaround enable
*/
struct k3_ringacc_soc_data {
unsigned dma_ring_reset_quirk:1;
};
static int k3_ringacc_ring_read_occ(struct k3_ring *ring)
{
return readl(&ring->rt->occ) & K3_RINGACC_RT_OCC_MASK;
}
static void k3_ringacc_ring_update_occ(struct k3_ring *ring)
{
u32 val;
val = readl(&ring->rt->occ);
ring->state.occ = val & K3_RINGACC_RT_OCC_MASK;
ring->state.tdown_complete = !!(val & K3_DMARING_RT_OCC_TDOWN_COMPLETE);
}
static long k3_ringacc_ring_get_fifo_pos(struct k3_ring *ring)
{
return K3_RINGACC_FIFO_WINDOW_SIZE_BYTES -
(4 << ring->elm_size);
}
static void *k3_ringacc_get_elm_addr(struct k3_ring *ring, u32 idx)
{
return (ring->ring_mem_virt + idx * (4 << ring->elm_size));
}
static int k3_ringacc_ring_push_mem(struct k3_ring *ring, void *elem);
static int k3_ringacc_ring_pop_mem(struct k3_ring *ring, void *elem);
static int k3_dmaring_fwd_pop(struct k3_ring *ring, void *elem);
static int k3_dmaring_reverse_pop(struct k3_ring *ring, void *elem);
static struct k3_ring_ops k3_ring_mode_ring_ops = {
.push_tail = k3_ringacc_ring_push_mem,
.pop_head = k3_ringacc_ring_pop_mem,
};
static struct k3_ring_ops k3_dmaring_fwd_ops = {
.push_tail = k3_ringacc_ring_push_mem,
.pop_head = k3_dmaring_fwd_pop,
};
static struct k3_ring_ops k3_dmaring_reverse_ops = {
/* Reverse side of the DMA ring can only be popped by SW */
.pop_head = k3_dmaring_reverse_pop,
};
static int k3_ringacc_ring_push_io(struct k3_ring *ring, void *elem);
static int k3_ringacc_ring_pop_io(struct k3_ring *ring, void *elem);
static int k3_ringacc_ring_push_head_io(struct k3_ring *ring, void *elem);
static int k3_ringacc_ring_pop_tail_io(struct k3_ring *ring, void *elem);
static struct k3_ring_ops k3_ring_mode_msg_ops = {
.push_tail = k3_ringacc_ring_push_io,
.push_head = k3_ringacc_ring_push_head_io,
.pop_tail = k3_ringacc_ring_pop_tail_io,
.pop_head = k3_ringacc_ring_pop_io,
};
static int k3_ringacc_ring_push_head_proxy(struct k3_ring *ring, void *elem);
static int k3_ringacc_ring_push_tail_proxy(struct k3_ring *ring, void *elem);
static int k3_ringacc_ring_pop_head_proxy(struct k3_ring *ring, void *elem);
static int k3_ringacc_ring_pop_tail_proxy(struct k3_ring *ring, void *elem);
static struct k3_ring_ops k3_ring_mode_proxy_ops = {
.push_tail = k3_ringacc_ring_push_tail_proxy,
.push_head = k3_ringacc_ring_push_head_proxy,
.pop_tail = k3_ringacc_ring_pop_tail_proxy,
.pop_head = k3_ringacc_ring_pop_head_proxy,
};
static void k3_ringacc_ring_dump(struct k3_ring *ring)
{
struct device *dev = ring->parent->dev;
dev_dbg(dev, "dump ring: %d\n", ring->ring_id);
dev_dbg(dev, "dump mem virt %p, dma %pad\n", ring->ring_mem_virt,
&ring->ring_mem_dma);
dev_dbg(dev, "dump elmsize %d, size %d, mode %d, proxy_id %d\n",
ring->elm_size, ring->size, ring->mode, ring->proxy_id);
dev_dbg(dev, "dump flags %08X\n", ring->flags);
dev_dbg(dev, "dump ring_rt_regs: db%08x\n", readl(&ring->rt->db));
dev_dbg(dev, "dump occ%08x\n", readl(&ring->rt->occ));
dev_dbg(dev, "dump indx%08x\n", readl(&ring->rt->indx));
dev_dbg(dev, "dump hwocc%08x\n", readl(&ring->rt->hwocc));
dev_dbg(dev, "dump hwindx%08x\n", readl(&ring->rt->hwindx));
if (ring->ring_mem_virt)
print_hex_dump_debug("dump ring_mem_virt ", DUMP_PREFIX_NONE,
16, 1, ring->ring_mem_virt, 16 * 8, false);
}
struct k3_ring *k3_ringacc_request_ring(struct k3_ringacc *ringacc,
int id, u32 flags)
{
int proxy_id = K3_RINGACC_PROXY_NOT_USED;
mutex_lock(&ringacc->req_lock);
if (!try_module_get(ringacc->dev->driver->owner))
goto err_module_get;
if (id == K3_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_RING_FLAG_SHARED))
goto error;
else if (ringacc->rings[id].flags & K3_RING_FLAG_SHARED)
goto out;
if (flags & K3_RINGACC_RING_USE_PROXY) {
proxy_id = find_first_zero_bit(ringacc->proxy_inuse,
ringacc->num_proxies);
if (proxy_id == ringacc->num_proxies)
goto error;
}
if (proxy_id != K3_RINGACC_PROXY_NOT_USED) {
set_bit(proxy_id, ringacc->proxy_inuse);
ringacc->rings[id].proxy_id = proxy_id;
dev_dbg(ringacc->dev, "Giving ring#%d proxy#%d\n", id,
proxy_id);
} else {
dev_dbg(ringacc->dev, "Giving ring#%d\n", id);
}
set_bit(id, ringacc->rings_inuse);
out:
ringacc->rings[id].use_count++;
mutex_unlock(&ringacc->req_lock);
return &ringacc->rings[id];
error:
module_put(ringacc->dev->driver->owner);
err_module_get:
mutex_unlock(&ringacc->req_lock);
return NULL;
}
EXPORT_SYMBOL_GPL(k3_ringacc_request_ring);
static int k3_dmaring_request_dual_ring(struct k3_ringacc *ringacc, int fwd_id,
struct k3_ring **fwd_ring,
struct k3_ring **compl_ring)
{
int ret = 0;
/*
* DMA rings must be requested by ID, completion ring is the reverse
* side of the forward ring
*/
if (fwd_id < 0)
return -EINVAL;
mutex_lock(&ringacc->req_lock);
if (!try_module_get(ringacc->dev->driver->owner)) {
ret = -EINVAL;
goto err_module_get;
}
if (test_bit(fwd_id, ringacc->rings_inuse)) {
ret = -EBUSY;
goto error;
}
*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);
mutex_unlock(&ringacc->req_lock);
return 0;
error:
module_put(ringacc->dev->driver->owner);
err_module_get:
mutex_unlock(&ringacc->req_lock);
return ret;
}
int k3_ringacc_request_rings_pair(struct k3_ringacc *ringacc,
int fwd_id, int compl_id,
struct k3_ring **fwd_ring,
struct k3_ring **compl_ring)
{
int ret = 0;
if (!fwd_ring || !compl_ring)
return -EINVAL;
if (ringacc->dma_rings)
return k3_dmaring_request_dual_ring(ringacc, fwd_id,
fwd_ring, compl_ring);
*fwd_ring = k3_ringacc_request_ring(ringacc, fwd_id, 0);
if (!(*fwd_ring))
return -ENODEV;
*compl_ring = k3_ringacc_request_ring(ringacc, compl_id, 0);
if (!(*compl_ring)) {
k3_ringacc_ring_free(*fwd_ring);
ret = -ENODEV;
}
return ret;
}
EXPORT_SYMBOL_GPL(k3_ringacc_request_rings_pair);
static void k3_ringacc_ring_reset_sci(struct k3_ring *ring)
{
struct ti_sci_msg_rm_ring_cfg ring_cfg = { 0 };
struct k3_ringacc *ringacc = ring->parent;
int ret;
ring_cfg.nav_id = ringacc->tisci_dev_id;
ring_cfg.index = ring->ring_id;
ring_cfg.valid_params = TI_SCI_MSG_VALUE_RM_RING_COUNT_VALID;
ring_cfg.count = ring->size;
ret = ringacc->tisci_ring_ops->set_cfg(ringacc->tisci, &ring_cfg);
if (ret)
dev_err(ringacc->dev, "TISCI reset ring fail (%d) ring_idx %d\n",
ret, ring->ring_id);
}
void k3_ringacc_ring_reset(struct k3_ring *ring)
{
if (!ring || !(ring->flags & K3_RING_FLAG_BUSY))
return;
memset(&ring->state, 0, sizeof(ring->state));
k3_ringacc_ring_reset_sci(ring);
}
EXPORT_SYMBOL_GPL(k3_ringacc_ring_reset);
static void k3_ringacc_ring_reconfig_qmode_sci(struct k3_ring *ring,
enum k3_ring_mode mode)
{
struct ti_sci_msg_rm_ring_cfg ring_cfg = { 0 };
struct k3_ringacc *ringacc = ring->parent;
int ret;
ring_cfg.nav_id = ringacc->tisci_dev_id;
ring_cfg.index = ring->ring_id;
ring_cfg.valid_params = TI_SCI_MSG_VALUE_RM_RING_MODE_VALID;
ring_cfg.mode = mode;
ret = ringacc->tisci_ring_ops->set_cfg(ringacc->tisci, &ring_cfg);
if (ret)
dev_err(ringacc->dev, "TISCI reconf qmode fail (%d) ring_idx %d\n",
ret, ring->ring_id);
}
void k3_ringacc_ring_reset_dma(struct k3_ring *ring, u32 occ)
{
if (!ring || !(ring->flags & K3_RING_FLAG_BUSY))
return;
if (!ring->parent->dma_ring_reset_quirk)
goto reset;
if (!occ)
occ = k3_ringacc_ring_read_occ(ring);
if (occ) {
u32 db_ring_cnt, db_ring_cnt_cur;
dev_dbg(ring->parent->dev, "%s %u occ: %u\n", __func__,
ring->ring_id, occ);
/* TI-SCI ring reset */
k3_ringacc_ring_reset_sci(ring);
/*
* Setup the ring in ring/doorbell mode (if not already in this
* mode)
*/
if (ring->mode != K3_RINGACC_RING_MODE_RING)
k3_ringacc_ring_reconfig_qmode_sci(
ring, K3_RINGACC_RING_MODE_RING);
/*
* 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 > K3_RINGACC_MAX_DB_RING_CNT)
db_ring_cnt_cur = K3_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;
}
/* Restore the original ring mode (if not ring mode) */
if (ring->mode != K3_RINGACC_RING_MODE_RING)
k3_ringacc_ring_reconfig_qmode_sci(ring, ring->mode);
}
reset:
/* Reset the ring */
k3_ringacc_ring_reset(ring);
}
EXPORT_SYMBOL_GPL(k3_ringacc_ring_reset_dma);
static void k3_ringacc_ring_free_sci(struct k3_ring *ring)
{
struct ti_sci_msg_rm_ring_cfg ring_cfg = { 0 };
struct k3_ringacc *ringacc = ring->parent;
int ret;
ring_cfg.nav_id = ringacc->tisci_dev_id;
ring_cfg.index = ring->ring_id;
ring_cfg.valid_params = TI_SCI_MSG_VALUE_RM_ALL_NO_ORDER;
ret = ringacc->tisci_ring_ops->set_cfg(ringacc->tisci, &ring_cfg);
if (ret)
dev_err(ringacc->dev, "TISCI ring free fail (%d) ring_idx %d\n",
ret, ring->ring_id);
}
int k3_ringacc_ring_free(struct k3_ring *ring)
{
struct k3_ringacc *ringacc;
if (!ring)
return -EINVAL;
ringacc = ring->parent;
/*
* DMA rings: rings shared memory and configuration, only forward ring
* is configured and reverse ring considered as slave.
*/
if (ringacc->dma_rings && (ring->flags & K3_RING_FLAG_REVERSE))
return 0;
dev_dbg(ring->parent->dev, "flags: 0x%08x\n", ring->flags);
if (!test_bit(ring->ring_id, ringacc->rings_inuse))
return -EINVAL;
mutex_lock(&ringacc->req_lock);
if (--ring->use_count)
goto out;
if (!(ring->flags & K3_RING_FLAG_BUSY))
goto no_init;
k3_ringacc_ring_free_sci(ring);
dma_free_coherent(ring->dma_dev,
ring->size * (4 << ring->elm_size),
ring->ring_mem_virt, ring->ring_mem_dma);
ring->flags = 0;
ring->ops = NULL;
ring->dma_dev = NULL;
ring->asel = 0;
if (ring->proxy_id != K3_RINGACC_PROXY_NOT_USED) {
clear_bit(ring->proxy_id, ringacc->proxy_inuse);
ring->proxy = NULL;
ring->proxy_id = K3_RINGACC_PROXY_NOT_USED;
}
no_init:
clear_bit(ring->ring_id, ringacc->rings_inuse);
module_put(ringacc->dev->driver->owner);
out:
mutex_unlock(&ringacc->req_lock);
return 0;
}
EXPORT_SYMBOL_GPL(k3_ringacc_ring_free);
u32 k3_ringacc_get_ring_id(struct k3_ring *ring)
{
if (!ring)
return -EINVAL;
return ring->ring_id;
}
EXPORT_SYMBOL_GPL(k3_ringacc_get_ring_id);
u32 k3_ringacc_get_tisci_dev_id(struct k3_ring *ring)
{
if (!ring)
return -EINVAL;
return ring->parent->tisci_dev_id;
}
EXPORT_SYMBOL_GPL(k3_ringacc_get_tisci_dev_id);
int k3_ringacc_get_ring_irq_num(struct k3_ring *ring)
{
int irq_num;
if (!ring)
return -EINVAL;
irq_num = msi_get_virq(ring->parent->dev, ring->ring_id);
if (irq_num <= 0)
irq_num = -EINVAL;
return irq_num;
}
EXPORT_SYMBOL_GPL(k3_ringacc_get_ring_irq_num);
static int k3_ringacc_ring_cfg_sci(struct k3_ring *ring)
{
struct ti_sci_msg_rm_ring_cfg ring_cfg = { 0 };
struct k3_ringacc *ringacc = ring->parent;
int ret;
if (!ringacc->tisci)
return -EINVAL;
ring_cfg.nav_id = ringacc->tisci_dev_id;
ring_cfg.index = ring->ring_id;
ring_cfg.valid_params = TI_SCI_MSG_VALUE_RM_ALL_NO_ORDER;
ring_cfg.addr_lo = lower_32_bits(ring->ring_mem_dma);
ring_cfg.addr_hi = upper_32_bits(ring->ring_mem_dma);
ring_cfg.count = ring->size;
ring_cfg.mode = ring->mode;
ring_cfg.size = ring->elm_size;
ring_cfg.asel = ring->asel;
ret = ringacc->tisci_ring_ops->set_cfg(ringacc->tisci, &ring_cfg);
if (ret)
dev_err(ringacc->dev, "TISCI config ring fail (%d) ring_idx %d\n",
ret, ring->ring_id);
return ret;
}
static int k3_dmaring_cfg(struct k3_ring *ring, struct k3_ring_cfg *cfg)
{
struct k3_ringacc *ringacc;
struct k3_ring *reverse_ring;
int ret = 0;
if (cfg->elm_size != K3_RINGACC_RING_ELSIZE_8 ||
cfg->mode != K3_RINGACC_RING_MODE_RING ||
cfg->size & ~K3_DMARING_CFG_RING_SIZE_ELCNT_MASK)
return -EINVAL;
ringacc = ring->parent;
/*
* DMA rings: rings shared memory and configuration, only forward ring
* is configured and reverse ring considered as slave.
*/
if (ringacc->dma_rings && (ring->flags & K3_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;
ring->asel = cfg->asel;
ring->dma_dev = cfg->dma_dev;
if (!ring->dma_dev) {
dev_warn(ringacc->dev, "dma_dev is not provided for ring%d\n",
ring->ring_id);
ring->dma_dev = ringacc->dev;
}
memset(&ring->state, 0, sizeof(ring->state));
ring->ops = &k3_dmaring_fwd_ops;
ring->ring_mem_virt = dma_alloc_coherent(ring->dma_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_ringacc_ring_cfg_sci(ring);
if (ret)
goto err_free_mem;
ring->flags |= K3_RING_FLAG_BUSY;
k3_ringacc_ring_dump(ring);
/* DMA rings: 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;
reverse_ring->asel = cfg->asel;
memset(&reverse_ring->state, 0, sizeof(reverse_ring->state));
reverse_ring->ops = &k3_dmaring_reverse_ops;
reverse_ring->ring_mem_virt = ring->ring_mem_virt;
reverse_ring->ring_mem_dma = ring->ring_mem_dma;
reverse_ring->flags |= K3_RING_FLAG_BUSY;
k3_ringacc_ring_dump(reverse_ring);
return 0;
err_free_mem:
dma_free_coherent(ring->dma_dev,
ring->size * (4 << ring->elm_size),
ring->ring_mem_virt,
ring->ring_mem_dma);
err_free_ops:
ring->ops = NULL;
ring->proxy = NULL;
ring->dma_dev = NULL;
ring->asel = 0;
return ret;
}
int k3_ringacc_ring_cfg(struct k3_ring *ring, struct k3_ring_cfg *cfg)
{
struct k3_ringacc *ringacc;
int ret = 0;
if (!ring || !cfg)
return -EINVAL;
ringacc = ring->parent;
if (ringacc->dma_rings)
return k3_dmaring_cfg(ring, cfg);
if (cfg->elm_size > K3_RINGACC_RING_ELSIZE_256 ||
cfg->mode >= K3_RINGACC_RING_MODE_INVALID ||
cfg->size & ~K3_RINGACC_CFG_RING_SIZE_ELCNT_MASK ||
!test_bit(ring->ring_id, ringacc->rings_inuse))
return -EINVAL;
if (cfg->mode == K3_RINGACC_RING_MODE_MESSAGE &&
ring->proxy_id == K3_RINGACC_PROXY_NOT_USED &&
cfg->elm_size > K3_RINGACC_RING_ELSIZE_8) {
dev_err(ringacc->dev,
"Message mode must use proxy for %u element size\n",
4 << ring->elm_size);
return -EINVAL;
}
/*
* In case of shared ring only the first user (master user) can
* configure the ring. The sequence should be by the client:
* ring = k3_ringacc_request_ring(ringacc, ring_id, 0); # master user
* k3_ringacc_ring_cfg(ring, cfg); # master configuration
* k3_ringacc_request_ring(ringacc, ring_id, K3_RING_FLAG_SHARED);
* k3_ringacc_request_ring(ringacc, ring_id, K3_RING_FLAG_SHARED);
*/
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));
if (ring->proxy_id != K3_RINGACC_PROXY_NOT_USED)
ring->proxy = ringacc->proxy_target_base +
ring->proxy_id * K3_RINGACC_PROXY_TARGET_STEP;
switch (ring->mode) {
case K3_RINGACC_RING_MODE_RING:
ring->ops = &k3_ring_mode_ring_ops;
ring->dma_dev = cfg->dma_dev;
if (!ring->dma_dev)
ring->dma_dev = ringacc->dev;
break;
case K3_RINGACC_RING_MODE_MESSAGE:
ring->dma_dev = ringacc->dev;
if (ring->proxy)
ring->ops = &k3_ring_mode_proxy_ops;
else
ring->ops = &k3_ring_mode_msg_ops;
break;
default:
ring->ops = NULL;
ret = -EINVAL;
goto err_free_proxy;
}
ring->ring_mem_virt = dma_alloc_coherent(ring->dma_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_ringacc_ring_cfg_sci(ring);
if (ret)
goto err_free_mem;
ring->flags |= K3_RING_FLAG_BUSY;
ring->flags |= (cfg->flags & K3_RINGACC_RING_SHARED) ?
K3_RING_FLAG_SHARED : 0;
k3_ringacc_ring_dump(ring);
return 0;
err_free_mem:
dma_free_coherent(ring->dma_dev,
ring->size * (4 << ring->elm_size),
ring->ring_mem_virt,
ring->ring_mem_dma);
err_free_ops:
ring->ops = NULL;
ring->dma_dev = NULL;
err_free_proxy:
ring->proxy = NULL;
return ret;
}
EXPORT_SYMBOL_GPL(k3_ringacc_ring_cfg);
u32 k3_ringacc_ring_get_size(struct k3_ring *ring)
{
if (!ring || !(ring->flags & K3_RING_FLAG_BUSY))
return -EINVAL;
return ring->size;
}
EXPORT_SYMBOL_GPL(k3_ringacc_ring_get_size);
u32 k3_ringacc_ring_get_free(struct k3_ring *ring)
{
if (!ring || !(ring->flags & K3_RING_FLAG_BUSY))
return -EINVAL;
if (!ring->state.free)
ring->state.free = ring->size - k3_ringacc_ring_read_occ(ring);
return ring->state.free;
}
EXPORT_SYMBOL_GPL(k3_ringacc_ring_get_free);
u32 k3_ringacc_ring_get_occ(struct k3_ring *ring)
{
if (!ring || !(ring->flags & K3_RING_FLAG_BUSY))
return -EINVAL;
return k3_ringacc_ring_read_occ(ring);
}
EXPORT_SYMBOL_GPL(k3_ringacc_ring_get_occ);
u32 k3_ringacc_ring_is_full(struct k3_ring *ring)
{
return !k3_ringacc_ring_get_free(ring);
}
EXPORT_SYMBOL_GPL(k3_ringacc_ring_is_full);
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,
};
#define K3_RINGACC_PROXY_MODE(x) (((x) & 0x3) << 16)
#define K3_RINGACC_PROXY_ELSIZE(x) (((x) & 0x7) << 24)
static int k3_ringacc_ring_cfg_proxy(struct k3_ring *ring,
enum k3_ringacc_proxy_access_mode mode)
{
u32 val;
val = ring->ring_id;
val |= K3_RINGACC_PROXY_MODE(mode);
val |= K3_RINGACC_PROXY_ELSIZE(ring->elm_size);
writel(val, &ring->proxy->control);
return 0;
}
static int k3_ringacc_ring_access_proxy(struct k3_ring *ring, void *elem,
enum k3_ringacc_access_mode access_mode)
{
void __iomem *ptr;
ptr = (void __iomem *)&ring->proxy->data;
switch (access_mode) {
case K3_RINGACC_ACCESS_MODE_PUSH_HEAD:
case K3_RINGACC_ACCESS_MODE_POP_HEAD:
k3_ringacc_ring_cfg_proxy(ring, PROXY_ACCESS_MODE_HEAD);
break;
case K3_RINGACC_ACCESS_MODE_PUSH_TAIL:
case K3_RINGACC_ACCESS_MODE_POP_TAIL:
k3_ringacc_ring_cfg_proxy(ring, PROXY_ACCESS_MODE_TAIL);
break;
default:
return -EINVAL;
}
ptr += k3_ringacc_ring_get_fifo_pos(ring);
switch (access_mode) {
case K3_RINGACC_ACCESS_MODE_POP_HEAD:
case K3_RINGACC_ACCESS_MODE_POP_TAIL:
dev_dbg(ring->parent->dev,
"proxy:memcpy_fromio(x): --> ptr(%p), mode:%d\n", ptr,
access_mode);
memcpy_fromio(elem, ptr, (4 << ring->elm_size));
ring->state.occ--;
break;
case K3_RINGACC_ACCESS_MODE_PUSH_TAIL:
case K3_RINGACC_ACCESS_MODE_PUSH_HEAD:
dev_dbg(ring->parent->dev,
"proxy:memcpy_toio(x): --> ptr(%p), mode:%d\n", ptr,
access_mode);
memcpy_toio(ptr, elem, (4 << ring->elm_size));
ring->state.free--;
break;
default:
return -EINVAL;
}
dev_dbg(ring->parent->dev, "proxy: free%d occ%d\n", ring->state.free,
ring->state.occ);
return 0;
}
static int k3_ringacc_ring_push_head_proxy(struct k3_ring *ring, void *elem)
{
return k3_ringacc_ring_access_proxy(ring, elem,
K3_RINGACC_ACCESS_MODE_PUSH_HEAD);
}
static int k3_ringacc_ring_push_tail_proxy(struct k3_ring *ring, void *elem)
{
return k3_ringacc_ring_access_proxy(ring, elem,
K3_RINGACC_ACCESS_MODE_PUSH_TAIL);
}
static int k3_ringacc_ring_pop_head_proxy(struct k3_ring *ring, void *elem)
{
return k3_ringacc_ring_access_proxy(ring, elem,
K3_RINGACC_ACCESS_MODE_POP_HEAD);
}
static int k3_ringacc_ring_pop_tail_proxy(struct k3_ring *ring, void *elem)
{
return k3_ringacc_ring_access_proxy(ring, elem,
K3_RINGACC_ACCESS_MODE_POP_HEAD);
}
static int k3_ringacc_ring_access_io(struct k3_ring *ring, void *elem,
enum k3_ringacc_access_mode access_mode)
{
void __iomem *ptr;
switch (access_mode) {
case K3_RINGACC_ACCESS_MODE_PUSH_HEAD:
case K3_RINGACC_ACCESS_MODE_POP_HEAD:
ptr = (void __iomem *)&ring->fifos->head_data;
break;
case K3_RINGACC_ACCESS_MODE_PUSH_TAIL:
case K3_RINGACC_ACCESS_MODE_POP_TAIL:
ptr = (void __iomem *)&ring->fifos->tail_data;
break;
default:
return -EINVAL;
}
ptr += k3_ringacc_ring_get_fifo_pos(ring);
switch (access_mode) {
case K3_RINGACC_ACCESS_MODE_POP_HEAD:
case K3_RINGACC_ACCESS_MODE_POP_TAIL:
dev_dbg(ring->parent->dev,
"memcpy_fromio(x): --> ptr(%p), mode:%d\n", ptr,
access_mode);
memcpy_fromio(elem, ptr, (4 << ring->elm_size));
ring->state.occ--;
break;
case K3_RINGACC_ACCESS_MODE_PUSH_TAIL:
case K3_RINGACC_ACCESS_MODE_PUSH_HEAD:
dev_dbg(ring->parent->dev,
"memcpy_toio(x): --> ptr(%p), mode:%d\n", ptr,
access_mode);
memcpy_toio(ptr, elem, (4 << ring->elm_size));
ring->state.free--;
break;
default:
return -EINVAL;
}
dev_dbg(ring->parent->dev, "free%d index%d occ%d index%d\n",
ring->state.free, ring->state.windex, ring->state.occ,
ring->state.rindex);
return 0;
}
static int k3_ringacc_ring_push_head_io(struct k3_ring *ring, void *elem)
{
return k3_ringacc_ring_access_io(ring, elem,
K3_RINGACC_ACCESS_MODE_PUSH_HEAD);
}
static int k3_ringacc_ring_push_io(struct k3_ring *ring, void *elem)
{
return k3_ringacc_ring_access_io(ring, elem,
K3_RINGACC_ACCESS_MODE_PUSH_TAIL);
}
static int k3_ringacc_ring_pop_io(struct k3_ring *ring, void *elem)
{
return k3_ringacc_ring_access_io(ring, elem,
K3_RINGACC_ACCESS_MODE_POP_HEAD);
}
static int k3_ringacc_ring_pop_tail_io(struct k3_ring *ring, void *elem)
{
return k3_ringacc_ring_access_io(ring, elem,
K3_RINGACC_ACCESS_MODE_POP_HEAD);
}
/*
* The element is 48 bits of address + ASEL bits in the ring.
* ASEL is used by the DMAs and should be removed for the kernel as it is not
* part of the physical memory address.
*/
static void k3_dmaring_remove_asel_from_elem(u64 *elem)
{
*elem &= GENMASK_ULL(K3_ADDRESS_ASEL_SHIFT - 1, 0);
}
static int k3_dmaring_fwd_pop(struct k3_ring *ring, void *elem)
{
void *elem_ptr;
u32 elem_idx;
/*
* DMA rings: 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_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_ringacc_get_elm_addr(ring, elem_idx);
memcpy(elem, elem_ptr, (4 << ring->elm_size));
k3_dmaring_remove_asel_from_elem(elem);
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_reverse_pop(struct k3_ring *ring, void *elem)
{
void *elem_ptr;
elem_ptr = k3_ringacc_get_elm_addr(ring, ring->state.rindex);
if (ring->state.occ) {
memcpy(elem, elem_ptr, (4 << ring->elm_size));
k3_dmaring_remove_asel_from_elem(elem);
ring->state.rindex = (ring->state.rindex + 1) % ring->size;
ring->state.occ--;
writel(-1 & K3_DMARING_RT_DB_ENTRY_MASK, &ring->rt->db);
} else if (ring->state.tdown_complete) {
dma_addr_t *value = elem;
*value = CPPI5_TDCM_MARKER;
writel(K3_DMARING_RT_DB_TDOWN_ACK, &ring->rt->db);
ring->state.tdown_complete = false;
}
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_ringacc_ring_push_mem(struct k3_ring *ring, void *elem)
{
void *elem_ptr;
elem_ptr = k3_ringacc_get_elm_addr(ring, ring->state.windex);
memcpy(elem_ptr, elem, (4 << ring->elm_size));
if (ring->parent->dma_rings) {
u64 *addr = elem_ptr;
*addr |= ((u64)ring->asel << K3_ADDRESS_ASEL_SHIFT);
}
ring->state.windex = (ring->state.windex + 1) % ring->size;
ring->state.free--;
writel(1, &ring->rt->db);
dev_dbg(ring->parent->dev, "ring_push_mem: free%d index%d\n",
ring->state.free, ring->state.windex);
return 0;
}
static int k3_ringacc_ring_pop_mem(struct k3_ring *ring, void *elem)
{
void *elem_ptr;
elem_ptr = k3_ringacc_get_elm_addr(ring, ring->state.rindex);
memcpy(elem, elem_ptr, (4 << ring->elm_size));
ring->state.rindex = (ring->state.rindex + 1) % ring->size;
ring->state.occ--;
writel(-1, &ring->rt->db);
dev_dbg(ring->parent->dev, "ring_pop_mem: occ%d index%d pos_ptr%p\n",
ring->state.occ, ring->state.rindex, elem_ptr);
return 0;
}
int k3_ringacc_ring_push(struct k3_ring *ring, void *elem)
{
int ret = -EOPNOTSUPP;
if (!ring || !(ring->flags & K3_RING_FLAG_BUSY))
return -EINVAL;
dev_dbg(ring->parent->dev, "ring_push: free%d index%d\n",
ring->state.free, ring->state.windex);
if (k3_ringacc_ring_is_full(ring))
return -ENOMEM;
if (ring->ops && ring->ops->push_tail)
ret = ring->ops->push_tail(ring, elem);
return ret;
}
EXPORT_SYMBOL_GPL(k3_ringacc_ring_push);
int k3_ringacc_ring_push_head(struct k3_ring *ring, void *elem)
{
int ret = -EOPNOTSUPP;
if (!ring || !(ring->flags & K3_RING_FLAG_BUSY))
return -EINVAL;
dev_dbg(ring->parent->dev, "ring_push_head: free%d index%d\n",
ring->state.free, ring->state.windex);
if (k3_ringacc_ring_is_full(ring))
return -ENOMEM;
if (ring->ops && ring->ops->push_head)
ret = ring->ops->push_head(ring, elem);
return ret;
}
EXPORT_SYMBOL_GPL(k3_ringacc_ring_push_head);
int k3_ringacc_ring_pop(struct k3_ring *ring, void *elem)
{
int ret = -EOPNOTSUPP;
if (!ring || !(ring->flags & K3_RING_FLAG_BUSY))
return -EINVAL;
if (!ring->state.occ)
k3_ringacc_ring_update_occ(ring);
dev_dbg(ring->parent->dev, "ring_pop: occ%d index%d\n", 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;
}
EXPORT_SYMBOL_GPL(k3_ringacc_ring_pop);
int k3_ringacc_ring_pop_tail(struct k3_ring *ring, void *elem)
{
int ret = -EOPNOTSUPP;
if (!ring || !(ring->flags & K3_RING_FLAG_BUSY))
return -EINVAL;
if (!ring->state.occ)
k3_ringacc_ring_update_occ(ring);
dev_dbg(ring->parent->dev, "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;
}
EXPORT_SYMBOL_GPL(k3_ringacc_ring_pop_tail);
struct k3_ringacc *of_k3_ringacc_get_by_phandle(struct device_node *np,
const char *property)
{
struct device_node *ringacc_np;
struct k3_ringacc *ringacc = ERR_PTR(-EPROBE_DEFER);
struct k3_ringacc *entry;
ringacc_np = of_parse_phandle(np, property, 0);
if (!ringacc_np)
return ERR_PTR(-ENODEV);
mutex_lock(&k3_ringacc_list_lock);
list_for_each_entry(entry, &k3_ringacc_list, list)
if (entry->dev->of_node == ringacc_np) {
ringacc = entry;
break;
}
mutex_unlock(&k3_ringacc_list_lock);
of_node_put(ringacc_np);
return ringacc;
}
EXPORT_SYMBOL_GPL(of_k3_ringacc_get_by_phandle);
static int k3_ringacc_probe_dt(struct k3_ringacc *ringacc)
{
struct device_node *node = ringacc->dev->of_node;
struct device *dev = ringacc->dev;
struct platform_device *pdev = to_platform_device(dev);
int ret;
if (!node) {
dev_err(dev, "device tree info unavailable\n");
return -ENODEV;
}
ret = of_property_read_u32(node, "ti,num-rings", &ringacc->num_rings);
if (ret) {
dev_err(dev, "ti,num-rings read failure %d\n", ret);
return ret;
}
ringacc->tisci = ti_sci_get_by_phandle(node, "ti,sci");
if (IS_ERR(ringacc->tisci)) {
ret = PTR_ERR(ringacc->tisci);
if (ret != -EPROBE_DEFER)
dev_err(dev, "ti,sci read fail %d\n", ret);
ringacc->tisci = NULL;
return ret;
}
ret = of_property_read_u32(node, "ti,sci-dev-id",
&ringacc->tisci_dev_id);
if (ret) {
dev_err(dev, "ti,sci-dev-id read fail %d\n", ret);
return ret;
}
pdev->id = ringacc->tisci_dev_id;
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)) {
dev_err(dev, "Failed to allocate MSI interrupts\n");
return PTR_ERR(ringacc->rm_gp_range);
}
return ti_sci_inta_msi_domain_alloc_irqs(ringacc->dev,
ringacc->rm_gp_range);
}
static const struct k3_ringacc_soc_data k3_ringacc_soc_data_sr1 = {
.dma_ring_reset_quirk = 1,
};
static const struct soc_device_attribute k3_ringacc_socinfo[] = {
{ .family = "AM65X",
.revision = "SR1.0",
.data = &k3_ringacc_soc_data_sr1
},
{/* sentinel */}
};
static int k3_ringacc_init(struct platform_device *pdev,
struct k3_ringacc *ringacc)
{
const struct soc_device_attribute *soc;
void __iomem *base_fifo, *base_rt;
struct device *dev = &pdev->dev;
int ret, i;
dev->msi.domain = of_msi_get_domain(dev, dev->of_node,
DOMAIN_BUS_TI_SCI_INTA_MSI);
if (!dev->msi.domain)
return -EPROBE_DEFER;
ret = k3_ringacc_probe_dt(ringacc);
if (ret)
return ret;
soc = soc_device_match(k3_ringacc_socinfo);
if (soc && soc->data) {
const struct k3_ringacc_soc_data *soc_data = soc->data;
ringacc->dma_ring_reset_quirk = soc_data->dma_ring_reset_quirk;
}
base_rt = devm_platform_ioremap_resource_byname(pdev, "rt");
if (IS_ERR(base_rt))
return PTR_ERR(base_rt);
base_fifo = devm_platform_ioremap_resource_byname(pdev, "fifos");
if (IS_ERR(base_fifo))
return PTR_ERR(base_fifo);
ringacc->proxy_gcfg = devm_platform_ioremap_resource_byname(pdev, "proxy_gcfg");
if (IS_ERR(ringacc->proxy_gcfg))
return PTR_ERR(ringacc->proxy_gcfg);
ringacc->proxy_target_base = devm_platform_ioremap_resource_byname(pdev,
"proxy_target");
if (IS_ERR(ringacc->proxy_target_base))
return PTR_ERR(ringacc->proxy_target_base);
ringacc->num_proxies = readl(&ringacc->proxy_gcfg->config) &
K3_RINGACC_PROXY_CFG_THREADS_MASK;
ringacc->rings = devm_kzalloc(dev,
sizeof(*ringacc->rings) *
ringacc->num_rings,
GFP_KERNEL);
ringacc->rings_inuse = devm_bitmap_zalloc(dev, ringacc->num_rings,
GFP_KERNEL);
ringacc->proxy_inuse = devm_bitmap_zalloc(dev, ringacc->num_proxies,
GFP_KERNEL);
if (!ringacc->rings || !ringacc->rings_inuse || !ringacc->proxy_inuse)
return -ENOMEM;
for (i = 0; i < ringacc->num_rings; i++) {
ringacc->rings[i].rt = base_rt +
K3_RINGACC_RT_REGS_STEP * i;
ringacc->rings[i].fifos = base_fifo +
K3_RINGACC_FIFO_REGS_STEP * i;
ringacc->rings[i].parent = ringacc;
ringacc->rings[i].ring_id = i;
ringacc->rings[i].proxy_id = K3_RINGACC_PROXY_NOT_USED;
}
ringacc->tisci_ring_ops = &ringacc->tisci->ops.rm_ring_ops;
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");
dev_info(dev, "RA Proxy rev. %08x, num_proxies:%u\n",
readl(&ringacc->proxy_gcfg->revision), ringacc->num_proxies);
return 0;
}
struct ringacc_match_data {
struct k3_ringacc_ops ops;
};
static struct ringacc_match_data k3_ringacc_data = {
.ops = {
.init = k3_ringacc_init,
},
};
/* Match table for of_platform binding */
static const struct of_device_id k3_ringacc_of_match[] = {
{ .compatible = "ti,am654-navss-ringacc", .data = &k3_ringacc_data, },
{},
};
MODULE_DEVICE_TABLE(of, k3_ringacc_of_match);
struct k3_ringacc *k3_ringacc_dmarings_init(struct platform_device *pdev,
struct k3_ringacc_init_data *data)
{
struct device *dev = &pdev->dev;
struct k3_ringacc *ringacc;
void __iomem *base_rt;
int i;
ringacc = devm_kzalloc(dev, sizeof(*ringacc), GFP_KERNEL);
if (!ringacc)
return ERR_PTR(-ENOMEM);
ringacc->dev = dev;
ringacc->dma_rings = true;
ringacc->num_rings = data->num_rings;
ringacc->tisci = data->tisci;
ringacc->tisci_dev_id = data->tisci_dev_id;
mutex_init(&ringacc->req_lock);
base_rt = devm_platform_ioremap_resource_byname(pdev, "ringrt");
if (IS_ERR(base_rt))
return ERR_CAST(base_rt);
ringacc->rings = devm_kzalloc(dev,
sizeof(*ringacc->rings) *
ringacc->num_rings * 2,
GFP_KERNEL);
ringacc->rings_inuse = devm_bitmap_zalloc(dev, ringacc->num_rings,
GFP_KERNEL);
if (!ringacc->rings || !ringacc->rings_inuse)
return ERR_PTR(-ENOMEM);
for (i = 0; i < ringacc->num_rings; i++) {
struct k3_ring *ring = &ringacc->rings[i];
ring->rt = base_rt + K3_DMARING_RT_REGS_STEP * i;
ring->parent = ringacc;
ring->ring_id = i;
ring->proxy_id = K3_RINGACC_PROXY_NOT_USED;
ring = &ringacc->rings[ringacc->num_rings + i];
ring->rt = base_rt + K3_DMARING_RT_REGS_STEP * i +
K3_DMARING_RT_REGS_REVERSE_OFS;
ring->parent = ringacc;
ring->ring_id = i;
ring->proxy_id = K3_RINGACC_PROXY_NOT_USED;
ring->flags = K3_RING_FLAG_REVERSE;
}
ringacc->tisci_ring_ops = &ringacc->tisci->ops.rm_ring_ops;
dev_info(dev, "Number of rings: %u\n", ringacc->num_rings);
return ringacc;
}
EXPORT_SYMBOL_GPL(k3_ringacc_dmarings_init);
static int k3_ringacc_probe(struct platform_device *pdev)
{
const struct ringacc_match_data *match_data;
struct device *dev = &pdev->dev;
struct k3_ringacc *ringacc;
int ret;
match_data = of_device_get_match_data(&pdev->dev);
if (!match_data)
return -ENODEV;
ringacc = devm_kzalloc(dev, sizeof(*ringacc), GFP_KERNEL);
if (!ringacc)
return -ENOMEM;
ringacc->dev = dev;
mutex_init(&ringacc->req_lock);
ringacc->ops = &match_data->ops;
ret = ringacc->ops->init(pdev, ringacc);
if (ret)
return ret;
dev_set_drvdata(dev, ringacc);
mutex_lock(&k3_ringacc_list_lock);
list_add_tail(&ringacc->list, &k3_ringacc_list);
mutex_unlock(&k3_ringacc_list_lock);
return 0;
}
static void k3_ringacc_remove(struct platform_device *pdev)
{
struct k3_ringacc *ringacc = dev_get_drvdata(&pdev->dev);
mutex_lock(&k3_ringacc_list_lock);
list_del(&ringacc->list);
mutex_unlock(&k3_ringacc_list_lock);
}
static struct platform_driver k3_ringacc_driver = {
.probe = k3_ringacc_probe,
.remove_new = k3_ringacc_remove,
.driver = {
.name = "k3-ringacc",
.of_match_table = k3_ringacc_of_match,
.suppress_bind_attrs = true,
},
};
module_platform_driver(k3_ringacc_driver);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("TI Ringacc driver for K3 SOCs");
MODULE_AUTHOR("Grygorii Strashko <[email protected]>");
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