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/*
* Driver for Marvell NETA network controller Buffer Manager.
*
* Copyright (C) 2015 Marvell
*
* Marcin Wojtas <mw@semihalf.com>
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#ifndef _MVNETA_BM_H_
#define _MVNETA_BM_H_
/* BM Configuration Register */
#define MVNETA_BM_CONFIG_REG 0x0
#define MVNETA_BM_STATUS_MASK 0x30
#define MVNETA_BM_ACTIVE_MASK BIT(4)
#define MVNETA_BM_MAX_IN_BURST_SIZE_MASK 0x60000
#define MVNETA_BM_MAX_IN_BURST_SIZE_16BP BIT(18)
#define MVNETA_BM_EMPTY_LIMIT_MASK BIT(19)
/* BM Activation Register */
#define MVNETA_BM_COMMAND_REG 0x4
#define MVNETA_BM_START_MASK BIT(0)
#define MVNETA_BM_STOP_MASK BIT(1)
#define MVNETA_BM_PAUSE_MASK BIT(2)
/* BM Xbar interface Register */
#define MVNETA_BM_XBAR_01_REG 0x8
#define MVNETA_BM_XBAR_23_REG 0xc
#define MVNETA_BM_XBAR_POOL_REG(pool) \
(((pool) < 2) ? MVNETA_BM_XBAR_01_REG : MVNETA_BM_XBAR_23_REG)
#define MVNETA_BM_TARGET_ID_OFFS(pool) (((pool) & 1) ? 16 : 0)
#define MVNETA_BM_TARGET_ID_MASK(pool) \
(0xf << MVNETA_BM_TARGET_ID_OFFS(pool))
#define MVNETA_BM_TARGET_ID_VAL(pool, id) \
((id) << MVNETA_BM_TARGET_ID_OFFS(pool))
#define MVNETA_BM_XBAR_ATTR_OFFS(pool) (((pool) & 1) ? 20 : 4)
#define MVNETA_BM_XBAR_ATTR_MASK(pool) \
(0xff << MVNETA_BM_XBAR_ATTR_OFFS(pool))
#define MVNETA_BM_XBAR_ATTR_VAL(pool, attr) \
((attr) << MVNETA_BM_XBAR_ATTR_OFFS(pool))
/* Address of External Buffer Pointers Pool Register */
#define MVNETA_BM_POOL_BASE_REG(pool) (0x10 + ((pool) << 4))
#define MVNETA_BM_POOL_ENABLE_MASK BIT(0)
/* External Buffer Pointers Pool RD pointer Register */
#define MVNETA_BM_POOL_READ_PTR_REG(pool) (0x14 + ((pool) << 4))
#define MVNETA_BM_POOL_SET_READ_PTR_MASK 0xfffc
#define MVNETA_BM_POOL_GET_READ_PTR_OFFS 16
#define MVNETA_BM_POOL_GET_READ_PTR_MASK 0xfffc0000
/* External Buffer Pointers Pool WR pointer */
#define MVNETA_BM_POOL_WRITE_PTR_REG(pool) (0x18 + ((pool) << 4))
#define MVNETA_BM_POOL_SET_WRITE_PTR_OFFS 0
#define MVNETA_BM_POOL_SET_WRITE_PTR_MASK 0xfffc
#define MVNETA_BM_POOL_GET_WRITE_PTR_OFFS 16
#define MVNETA_BM_POOL_GET_WRITE_PTR_MASK 0xfffc0000
/* External Buffer Pointers Pool Size Register */
#define MVNETA_BM_POOL_SIZE_REG(pool) (0x1c + ((pool) << 4))
#define MVNETA_BM_POOL_SIZE_MASK 0x3fff
/* BM Interrupt Cause Register */
#define MVNETA_BM_INTR_CAUSE_REG (0x50)
/* BM interrupt Mask Register */
#define MVNETA_BM_INTR_MASK_REG (0x54)
/* Other definitions */
#define MVNETA_BM_SHORT_PKT_SIZE 256
#define MVNETA_BM_POOLS_NUM 4
#define MVNETA_BM_POOL_CAP_MIN 128
#define MVNETA_BM_POOL_CAP_DEF 2048
#define MVNETA_BM_POOL_CAP_MAX \
(16 * 1024 - MVNETA_BM_POOL_CAP_ALIGN)
#define MVNETA_BM_POOL_CAP_ALIGN 32
#define MVNETA_BM_POOL_PTR_ALIGN 32
#define MVNETA_BM_POOL_ACCESS_OFFS 8
#define MVNETA_BM_BPPI_SIZE 0x100000
#define MVNETA_RX_BUF_SIZE(pkt_size) ((pkt_size) + NET_SKB_PAD)
enum mvneta_bm_type {
MVNETA_BM_FREE,
MVNETA_BM_LONG,
MVNETA_BM_SHORT
};
struct mvneta_bm {
void __iomem *reg_base;
struct clk *clk;
struct platform_device *pdev;
struct gen_pool *bppi_pool;
/* BPPI virtual base address */
void __iomem *bppi_virt_addr;
/* BPPI physical base address */
dma_addr_t bppi_phys_addr;
/* BM pools */
struct mvneta_bm_pool *bm_pools;
};
struct mvneta_bm_pool {
struct hwbm_pool hwbm_pool;
/* Pool number in the range 0-3 */
u8 id;
enum mvneta_bm_type type;
/* Packet size */
int pkt_size;
/* Size of the buffer acces through DMA*/
u32 buf_size;
/* BPPE virtual base address */
u32 *virt_addr;
/* BPPE physical base address */
dma_addr_t phys_addr;
/* Ports using BM pool */
u8 port_map;
struct mvneta_bm *priv;
};
/* Declarations and definitions */
#if IS_ENABLED(CONFIG_MVNETA_BM)
struct mvneta_bm *mvneta_bm_get(struct device_node *node);
void mvneta_bm_put(struct mvneta_bm *priv);
void mvneta_bm_pool_destroy(struct mvneta_bm *priv,
struct mvneta_bm_pool *bm_pool, u8 port_map);
void mvneta_bm_bufs_free(struct mvneta_bm *priv, struct mvneta_bm_pool *bm_pool,
u8 port_map);
int mvneta_bm_construct(struct hwbm_pool *hwbm_pool, void *buf);
int mvneta_bm_pool_refill(struct mvneta_bm *priv,
struct mvneta_bm_pool *bm_pool);
struct mvneta_bm_pool *mvneta_bm_pool_use(struct mvneta_bm *priv, u8 pool_id,
enum mvneta_bm_type type, u8 port_id,
int pkt_size);
static inline void mvneta_bm_pool_put_bp(struct mvneta_bm *priv,
struct mvneta_bm_pool *bm_pool,
dma_addr_t buf_phys_addr)
{
writel_relaxed(buf_phys_addr, priv->bppi_virt_addr +
(bm_pool->id << MVNETA_BM_POOL_ACCESS_OFFS));
}
static inline u32 mvneta_bm_pool_get_bp(struct mvneta_bm *priv,
struct mvneta_bm_pool *bm_pool)
{
return readl_relaxed(priv->bppi_virt_addr +
(bm_pool->id << MVNETA_BM_POOL_ACCESS_OFFS));
}
#else
static inline void mvneta_bm_pool_destroy(struct mvneta_bm *priv,
struct mvneta_bm_pool *bm_pool,
u8 port_map) {}
static inline void mvneta_bm_bufs_free(struct mvneta_bm *priv,
struct mvneta_bm_pool *bm_pool,
u8 port_map) {}
static inline int mvneta_bm_construct(struct hwbm_pool *hwbm_pool, void *buf)
{ return 0; }
static inline int mvneta_bm_pool_refill(struct mvneta_bm *priv,
struct mvneta_bm_pool *bm_pool)
{ return 0; }
static inline struct mvneta_bm_pool *mvneta_bm_pool_use(struct mvneta_bm *priv,
u8 pool_id,
enum mvneta_bm_type type,
u8 port_id,
int pkt_size)
{ return NULL; }
static inline void mvneta_bm_pool_put_bp(struct mvneta_bm *priv,
struct mvneta_bm_pool *bm_pool,
dma_addr_t buf_phys_addr) {}
static inline u32 mvneta_bm_pool_get_bp(struct mvneta_bm *priv,
struct mvneta_bm_pool *bm_pool)
{ return 0; }
static inline struct mvneta_bm *mvneta_bm_get(struct device_node *node)
{ return NULL; }
static inline void mvneta_bm_put(struct mvneta_bm *priv) {}
#endif /* CONFIG_MVNETA_BM */
#endif
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