--- /dev/null
+/*
+ * Copyright (c) 2016 QLogic Corporation.
+ * All rights reserved.
+ * www.qlogic.com
+ *
+ * See LICENSE.qede_pmd for copyright and licensing details.
+ */
+
+#ifndef __ECORE_CHAIN_H__
+#define __ECORE_CHAIN_H__
+
+#include <assert.h> /* @DPDK */
+
+#include "common_hsi.h"
+#include "ecore_utils.h"
+
+enum ecore_chain_mode {
+ /* Each Page contains a next pointer at its end */
+ ECORE_CHAIN_MODE_NEXT_PTR,
+
+ /* Chain is a single page (next ptr) is unrequired */
+ ECORE_CHAIN_MODE_SINGLE,
+
+ /* Page pointers are located in a side list */
+ ECORE_CHAIN_MODE_PBL,
+};
+
+enum ecore_chain_use_mode {
+ ECORE_CHAIN_USE_TO_PRODUCE, /* Chain starts empty */
+ ECORE_CHAIN_USE_TO_CONSUME, /* Chain starts full */
+ ECORE_CHAIN_USE_TO_CONSUME_PRODUCE, /* Chain starts empty */
+};
+
+enum ecore_chain_cnt_type {
+ /* The chain's size/prod/cons are kept in 16-bit variables */
+ ECORE_CHAIN_CNT_TYPE_U16,
+
+ /* The chain's size/prod/cons are kept in 32-bit variables */
+ ECORE_CHAIN_CNT_TYPE_U32,
+};
+
+struct ecore_chain_next {
+ struct regpair next_phys;
+ void *next_virt;
+};
+
+struct ecore_chain_pbl_u16 {
+ u16 prod_page_idx;
+ u16 cons_page_idx;
+};
+
+struct ecore_chain_pbl_u32 {
+ u32 prod_page_idx;
+ u32 cons_page_idx;
+};
+
+struct ecore_chain_pbl {
+ /* Base address of a pre-allocated buffer for pbl */
+ dma_addr_t p_phys_table;
+ void *p_virt_table;
+
+ /* Table for keeping the virtual addresses of the chain pages,
+ * respectively to the physical addresses in the pbl table.
+ */
+ void **pp_virt_addr_tbl;
+
+ /* Index to current used page by producer/consumer */
+ union {
+ struct ecore_chain_pbl_u16 pbl16;
+ struct ecore_chain_pbl_u32 pbl32;
+ } u;
+};
+
+struct ecore_chain_u16 {
+ /* Cyclic index of next element to produce/consme */
+ u16 prod_idx;
+ u16 cons_idx;
+};
+
+struct ecore_chain_u32 {
+ /* Cyclic index of next element to produce/consme */
+ u32 prod_idx;
+ u32 cons_idx;
+};
+
+struct ecore_chain {
+ /* Address of first page of the chain */
+ void *p_virt_addr;
+ dma_addr_t p_phys_addr;
+
+ /* Point to next element to produce/consume */
+ void *p_prod_elem;
+ void *p_cons_elem;
+
+ enum ecore_chain_mode mode;
+ enum ecore_chain_use_mode intended_use;
+
+ enum ecore_chain_cnt_type cnt_type;
+ union {
+ struct ecore_chain_u16 chain16;
+ struct ecore_chain_u32 chain32;
+ } u;
+
+ u32 page_cnt;
+
+ /* Number of elements - capacity is for usable elements only,
+ * while size will contain total number of elements [for entire chain].
+ */
+ u32 capacity;
+ u32 size;
+
+ /* Elements information for fast calculations */
+ u16 elem_per_page;
+ u16 elem_per_page_mask;
+ u16 elem_unusable;
+ u16 usable_per_page;
+ u16 elem_size;
+ u16 next_page_mask;
+
+ struct ecore_chain_pbl pbl;
+};
+
+#define ECORE_CHAIN_PBL_ENTRY_SIZE (8)
+#define ECORE_CHAIN_PAGE_SIZE (0x1000)
+#define ELEMS_PER_PAGE(elem_size) (ECORE_CHAIN_PAGE_SIZE / (elem_size))
+
+#define UNUSABLE_ELEMS_PER_PAGE(elem_size, mode) \
+ ((mode == ECORE_CHAIN_MODE_NEXT_PTR) ? \
+ (1 + ((sizeof(struct ecore_chain_next) - 1) / \
+ (elem_size))) : 0)
+
+#define USABLE_ELEMS_PER_PAGE(elem_size, mode) \
+ ((u32)(ELEMS_PER_PAGE(elem_size) - \
+ UNUSABLE_ELEMS_PER_PAGE(elem_size, mode)))
+
+#define ECORE_CHAIN_PAGE_CNT(elem_cnt, elem_size, mode) \
+ DIV_ROUND_UP(elem_cnt, USABLE_ELEMS_PER_PAGE(elem_size, mode))
+
+#define is_chain_u16(p) ((p)->cnt_type == ECORE_CHAIN_CNT_TYPE_U16)
+#define is_chain_u32(p) ((p)->cnt_type == ECORE_CHAIN_CNT_TYPE_U32)
+
+/* Accessors */
+static OSAL_INLINE u16 ecore_chain_get_prod_idx(struct ecore_chain *p_chain)
+{
+ OSAL_ASSERT(is_chain_u16(p_chain));
+ return p_chain->u.chain16.prod_idx;
+}
+
+static OSAL_INLINE u32 ecore_chain_get_prod_idx_u32(struct ecore_chain *p_chain)
+{
+ OSAL_ASSERT(is_chain_u32(p_chain));
+ return p_chain->u.chain32.prod_idx;
+}
+
+static OSAL_INLINE u16 ecore_chain_get_cons_idx(struct ecore_chain *p_chain)
+{
+ OSAL_ASSERT(is_chain_u16(p_chain));
+ return p_chain->u.chain16.cons_idx;
+}
+
+static OSAL_INLINE u32 ecore_chain_get_cons_idx_u32(struct ecore_chain *p_chain)
+{
+ OSAL_ASSERT(is_chain_u32(p_chain));
+ return p_chain->u.chain32.cons_idx;
+}
+
+/* FIXME:
+ * Should create OSALs for the below definitions.
+ * For Linux, replace them with the existing U16_MAX and U32_MAX, and handle
+ * kernel versions that lack them.
+ */
+#define ECORE_U16_MAX ((u16)~0U)
+#define ECORE_U32_MAX ((u32)~0U)
+
+static OSAL_INLINE u16 ecore_chain_get_elem_left(struct ecore_chain *p_chain)
+{
+ u16 used;
+
+ OSAL_ASSERT(is_chain_u16(p_chain));
+
+ used = (u16)(((u32)ECORE_U16_MAX + 1 +
+ (u32)(p_chain->u.chain16.prod_idx)) -
+ (u32)p_chain->u.chain16.cons_idx);
+ if (p_chain->mode == ECORE_CHAIN_MODE_NEXT_PTR)
+ used -= p_chain->u.chain16.prod_idx / p_chain->elem_per_page -
+ p_chain->u.chain16.cons_idx / p_chain->elem_per_page;
+
+ return (u16)(p_chain->capacity - used);
+}
+
+static OSAL_INLINE u32
+ecore_chain_get_elem_left_u32(struct ecore_chain *p_chain)
+{
+ u32 used;
+
+ OSAL_ASSERT(is_chain_u32(p_chain));
+
+ used = (u32)(((u64)ECORE_U32_MAX + 1 +
+ (u64)(p_chain->u.chain32.prod_idx)) -
+ (u64)p_chain->u.chain32.cons_idx);
+ if (p_chain->mode == ECORE_CHAIN_MODE_NEXT_PTR)
+ used -= p_chain->u.chain32.prod_idx / p_chain->elem_per_page -
+ p_chain->u.chain32.cons_idx / p_chain->elem_per_page;
+
+ return p_chain->capacity - used;
+}
+
+static OSAL_INLINE u8 ecore_chain_is_full(struct ecore_chain *p_chain)
+{
+ if (is_chain_u16(p_chain))
+ return (ecore_chain_get_elem_left(p_chain) ==
+ p_chain->capacity);
+ else
+ return (ecore_chain_get_elem_left_u32(p_chain) ==
+ p_chain->capacity);
+}
+
+static OSAL_INLINE u8 ecore_chain_is_empty(struct ecore_chain *p_chain)
+{
+ if (is_chain_u16(p_chain))
+ return (ecore_chain_get_elem_left(p_chain) == 0);
+ else
+ return (ecore_chain_get_elem_left_u32(p_chain) == 0);
+}
+
+static OSAL_INLINE
+u16 ecore_chain_get_elem_per_page(struct ecore_chain *p_chain)
+{
+ return p_chain->elem_per_page;
+}
+
+static OSAL_INLINE
+u16 ecore_chain_get_usable_per_page(struct ecore_chain *p_chain)
+{
+ return p_chain->usable_per_page;
+}
+
+static OSAL_INLINE
+u16 ecore_chain_get_unusable_per_page(struct ecore_chain *p_chain)
+{
+ return p_chain->elem_unusable;
+}
+
+static OSAL_INLINE u32 ecore_chain_get_size(struct ecore_chain *p_chain)
+{
+ return p_chain->size;
+}
+
+static OSAL_INLINE u32 ecore_chain_get_page_cnt(struct ecore_chain *p_chain)
+{
+ return p_chain->page_cnt;
+}
+
+static OSAL_INLINE
+dma_addr_t ecore_chain_get_pbl_phys(struct ecore_chain *p_chain)
+{
+ return p_chain->pbl.p_phys_table;
+}
+
+/**
+ * @brief ecore_chain_advance_page -
+ *
+ * Advance the next element accros pages for a linked chain
+ *
+ * @param p_chain
+ * @param p_next_elem
+ * @param idx_to_inc
+ * @param page_to_inc
+ */
+static OSAL_INLINE void
+ecore_chain_advance_page(struct ecore_chain *p_chain, void **p_next_elem,
+ void *idx_to_inc, void *page_to_inc)
+{
+ struct ecore_chain_next *p_next = OSAL_NULL;
+ u32 page_index = 0;
+
+ switch (p_chain->mode) {
+ case ECORE_CHAIN_MODE_NEXT_PTR:
+ p_next = (struct ecore_chain_next *)(*p_next_elem);
+ *p_next_elem = p_next->next_virt;
+ if (is_chain_u16(p_chain))
+ *(u16 *)idx_to_inc += p_chain->elem_unusable;
+ else
+ *(u32 *)idx_to_inc += p_chain->elem_unusable;
+ break;
+ case ECORE_CHAIN_MODE_SINGLE:
+ *p_next_elem = p_chain->p_virt_addr;
+ break;
+ case ECORE_CHAIN_MODE_PBL:
+ if (is_chain_u16(p_chain)) {
+ if (++(*(u16 *)page_to_inc) == p_chain->page_cnt)
+ *(u16 *)page_to_inc = 0;
+ page_index = *(u16 *)page_to_inc;
+ } else {
+ if (++(*(u32 *)page_to_inc) == p_chain->page_cnt)
+ *(u32 *)page_to_inc = 0;
+ page_index = *(u32 *)page_to_inc;
+ }
+ *p_next_elem = p_chain->pbl.pp_virt_addr_tbl[page_index];
+ }
+}
+
+#define is_unusable_idx(p, idx) \
+ (((p)->u.chain16.idx & (p)->elem_per_page_mask) == (p)->usable_per_page)
+
+#define is_unusable_idx_u32(p, idx) \
+ (((p)->u.chain32.idx & (p)->elem_per_page_mask) == (p)->usable_per_page)
+
+#define is_unusable_next_idx(p, idx) \
+ ((((p)->u.chain16.idx + 1) & (p)->elem_per_page_mask) == \
+ (p)->usable_per_page)
+
+#define is_unusable_next_idx_u32(p, idx) \
+ ((((p)->u.chain32.idx + 1) & (p)->elem_per_page_mask) \
+ == (p)->usable_per_page)
+
+#define test_and_skip(p, idx) \
+ do { \
+ if (is_chain_u16(p)) { \
+ if (is_unusable_idx(p, idx)) \
+ (p)->u.chain16.idx += (p)->elem_unusable; \
+ } else { \
+ if (is_unusable_idx_u32(p, idx)) \
+ (p)->u.chain32.idx += (p)->elem_unusable; \
+ } \
+ } while (0)
+
+/**
+ * @brief ecore_chain_return_multi_produced -
+ *
+ * A chain in which the driver "Produces" elements should use this API
+ * to indicate previous produced elements are now consumed.
+ *
+ * @param p_chain
+ * @param num
+ */
+static OSAL_INLINE
+void ecore_chain_return_multi_produced(struct ecore_chain *p_chain, u32 num)
+{
+ if (is_chain_u16(p_chain))
+ p_chain->u.chain16.cons_idx += (u16)num;
+ else
+ p_chain->u.chain32.cons_idx += num;
+ test_and_skip(p_chain, cons_idx);
+}
+
+/**
+ * @brief ecore_chain_return_produced -
+ *
+ * A chain in which the driver "Produces" elements should use this API
+ * to indicate previous produced elements are now consumed.
+ *
+ * @param p_chain
+ */
+static OSAL_INLINE void ecore_chain_return_produced(struct ecore_chain *p_chain)
+{
+ if (is_chain_u16(p_chain))
+ p_chain->u.chain16.cons_idx++;
+ else
+ p_chain->u.chain32.cons_idx++;
+ test_and_skip(p_chain, cons_idx);
+}
+
+/**
+ * @brief ecore_chain_produce -
+ *
+ * A chain in which the driver "Produces" elements should use this to get
+ * a pointer to the next element which can be "Produced". It's driver
+ * responsibility to validate that the chain has room for new element.
+ *
+ * @param p_chain
+ *
+ * @return void*, a pointer to next element
+ */
+static OSAL_INLINE void *ecore_chain_produce(struct ecore_chain *p_chain)
+{
+ void *p_ret = OSAL_NULL, *p_prod_idx, *p_prod_page_idx;
+
+ if (is_chain_u16(p_chain)) {
+ if ((p_chain->u.chain16.prod_idx &
+ p_chain->elem_per_page_mask) == p_chain->next_page_mask) {
+ p_prod_idx = &p_chain->u.chain16.prod_idx;
+ p_prod_page_idx = &p_chain->pbl.u.pbl16.prod_page_idx;
+ ecore_chain_advance_page(p_chain, &p_chain->p_prod_elem,
+ p_prod_idx, p_prod_page_idx);
+ }
+ p_chain->u.chain16.prod_idx++;
+ } else {
+ if ((p_chain->u.chain32.prod_idx &
+ p_chain->elem_per_page_mask) == p_chain->next_page_mask) {
+ p_prod_idx = &p_chain->u.chain32.prod_idx;
+ p_prod_page_idx = &p_chain->pbl.u.pbl32.prod_page_idx;
+ ecore_chain_advance_page(p_chain, &p_chain->p_prod_elem,
+ p_prod_idx, p_prod_page_idx);
+ }
+ p_chain->u.chain32.prod_idx++;
+ }
+
+ p_ret = p_chain->p_prod_elem;
+ p_chain->p_prod_elem = (void *)(((u8 *)p_chain->p_prod_elem) +
+ p_chain->elem_size);
+
+ return p_ret;
+}
+
+/**
+ * @brief ecore_chain_get_capacity -
+ *
+ * Get the maximum number of BDs in chain
+ *
+ * @param p_chain
+ * @param num
+ *
+ * @return number of unusable BDs
+ */
+static OSAL_INLINE u32 ecore_chain_get_capacity(struct ecore_chain *p_chain)
+{
+ return p_chain->capacity;
+}
+
+/**
+ * @brief ecore_chain_recycle_consumed -
+ *
+ * Returns an element which was previously consumed;
+ * Increments producers so they could be written to FW.
+ *
+ * @param p_chain
+ */
+static OSAL_INLINE
+void ecore_chain_recycle_consumed(struct ecore_chain *p_chain)
+{
+ test_and_skip(p_chain, prod_idx);
+ if (is_chain_u16(p_chain))
+ p_chain->u.chain16.prod_idx++;
+ else
+ p_chain->u.chain32.prod_idx++;
+}
+
+/**
+ * @brief ecore_chain_consume -
+ *
+ * A Chain in which the driver utilizes data written by a different source
+ * (i.e., FW) should use this to access passed buffers.
+ *
+ * @param p_chain
+ *
+ * @return void*, a pointer to the next buffer written
+ */
+static OSAL_INLINE void *ecore_chain_consume(struct ecore_chain *p_chain)
+{
+ void *p_ret = OSAL_NULL, *p_cons_idx, *p_cons_page_idx;
+
+ if (is_chain_u16(p_chain)) {
+ if ((p_chain->u.chain16.cons_idx &
+ p_chain->elem_per_page_mask) == p_chain->next_page_mask) {
+ p_cons_idx = &p_chain->u.chain16.cons_idx;
+ p_cons_page_idx = &p_chain->pbl.u.pbl16.cons_page_idx;
+ ecore_chain_advance_page(p_chain, &p_chain->p_cons_elem,
+ p_cons_idx, p_cons_page_idx);
+ }
+ p_chain->u.chain16.cons_idx++;
+ } else {
+ if ((p_chain->u.chain32.cons_idx &
+ p_chain->elem_per_page_mask) == p_chain->next_page_mask) {
+ p_cons_idx = &p_chain->u.chain32.cons_idx;
+ p_cons_page_idx = &p_chain->pbl.u.pbl32.cons_page_idx;
+ ecore_chain_advance_page(p_chain, &p_chain->p_cons_elem,
+ p_cons_idx, p_cons_page_idx);
+ }
+ p_chain->u.chain32.cons_idx++;
+ }
+
+ p_ret = p_chain->p_cons_elem;
+ p_chain->p_cons_elem = (void *)(((u8 *)p_chain->p_cons_elem) +
+ p_chain->elem_size);
+
+ return p_ret;
+}
+
+/**
+ * @brief ecore_chain_reset -
+ *
+ * Resets the chain to its start state
+ *
+ * @param p_chain pointer to a previously allocted chain
+ */
+static OSAL_INLINE void ecore_chain_reset(struct ecore_chain *p_chain)
+{
+ u32 i;
+
+ if (is_chain_u16(p_chain)) {
+ p_chain->u.chain16.prod_idx = 0;
+ p_chain->u.chain16.cons_idx = 0;
+ } else {
+ p_chain->u.chain32.prod_idx = 0;
+ p_chain->u.chain32.cons_idx = 0;
+ }
+ p_chain->p_cons_elem = p_chain->p_virt_addr;
+ p_chain->p_prod_elem = p_chain->p_virt_addr;
+
+ if (p_chain->mode == ECORE_CHAIN_MODE_PBL) {
+ /* Use (page_cnt - 1) as a reset value for the prod/cons page's
+ * indices, to avoid unnecessary page advancing on the first
+ * call to ecore_chain_produce/consume. Instead, the indices
+ * will be advanced to page_cnt and then will be wrapped to 0.
+ */
+ u32 reset_val = p_chain->page_cnt - 1;
+
+ if (is_chain_u16(p_chain)) {
+ p_chain->pbl.u.pbl16.prod_page_idx = (u16)reset_val;
+ p_chain->pbl.u.pbl16.cons_page_idx = (u16)reset_val;
+ } else {
+ p_chain->pbl.u.pbl32.prod_page_idx = reset_val;
+ p_chain->pbl.u.pbl32.cons_page_idx = reset_val;
+ }
+ }
+
+ switch (p_chain->intended_use) {
+ case ECORE_CHAIN_USE_TO_CONSUME_PRODUCE:
+ case ECORE_CHAIN_USE_TO_PRODUCE:
+ /* Do nothing */
+ break;
+
+ case ECORE_CHAIN_USE_TO_CONSUME:
+ /* produce empty elements */
+ for (i = 0; i < p_chain->capacity; i++)
+ ecore_chain_recycle_consumed(p_chain);
+ break;
+ }
+}
+
+/**
+ * @brief ecore_chain_init_params -
+ *
+ * Initalizes a basic chain struct
+ *
+ * @param p_chain
+ * @param page_cnt number of pages in the allocated buffer
+ * @param elem_size size of each element in the chain
+ * @param intended_use
+ * @param mode
+ * @param cnt_type
+ */
+static OSAL_INLINE void
+ecore_chain_init_params(struct ecore_chain *p_chain, u32 page_cnt, u8 elem_size,
+ enum ecore_chain_use_mode intended_use,
+ enum ecore_chain_mode mode,
+ enum ecore_chain_cnt_type cnt_type)
+{
+ /* chain fixed parameters */
+ p_chain->p_virt_addr = OSAL_NULL;
+ p_chain->p_phys_addr = 0;
+ p_chain->elem_size = elem_size;
+ p_chain->intended_use = intended_use;
+ p_chain->mode = mode;
+ p_chain->cnt_type = cnt_type;
+
+ p_chain->elem_per_page = ELEMS_PER_PAGE(elem_size);
+ p_chain->usable_per_page = USABLE_ELEMS_PER_PAGE(elem_size, mode);
+ p_chain->elem_per_page_mask = p_chain->elem_per_page - 1;
+ p_chain->elem_unusable = UNUSABLE_ELEMS_PER_PAGE(elem_size, mode);
+ p_chain->next_page_mask = (p_chain->usable_per_page &
+ p_chain->elem_per_page_mask);
+
+ p_chain->page_cnt = page_cnt;
+ p_chain->capacity = p_chain->usable_per_page * page_cnt;
+ p_chain->size = p_chain->elem_per_page * page_cnt;
+
+ p_chain->pbl.p_phys_table = 0;
+ p_chain->pbl.p_virt_table = OSAL_NULL;
+ p_chain->pbl.pp_virt_addr_tbl = OSAL_NULL;
+}
+
+/**
+ * @brief ecore_chain_init_mem -
+ *
+ * Initalizes a basic chain struct with its chain buffers
+ *
+ * @param p_chain
+ * @param p_virt_addr virtual address of allocated buffer's beginning
+ * @param p_phys_addr physical address of allocated buffer's beginning
+ *
+ */
+static OSAL_INLINE void ecore_chain_init_mem(struct ecore_chain *p_chain,
+ void *p_virt_addr,
+ dma_addr_t p_phys_addr)
+{
+ p_chain->p_virt_addr = p_virt_addr;
+ p_chain->p_phys_addr = p_phys_addr;
+}
+
+/**
+ * @brief ecore_chain_init_pbl_mem -
+ *
+ * Initalizes a basic chain struct with its pbl buffers
+ *
+ * @param p_chain
+ * @param p_virt_pbl pointer to a pre allocated side table which will hold
+ * virtual page addresses.
+ * @param p_phys_pbl pointer to a pre-allocated side table which will hold
+ * physical page addresses.
+ * @param pp_virt_addr_tbl
+ * pointer to a pre-allocated side table which will hold
+ * the virtual addresses of the chain pages.
+ *
+ */
+static OSAL_INLINE void ecore_chain_init_pbl_mem(struct ecore_chain *p_chain,
+ void *p_virt_pbl,
+ dma_addr_t p_phys_pbl,
+ void **pp_virt_addr_tbl)
+{
+ p_chain->pbl.p_phys_table = p_phys_pbl;
+ p_chain->pbl.p_virt_table = p_virt_pbl;
+ p_chain->pbl.pp_virt_addr_tbl = pp_virt_addr_tbl;
+}
+
+/**
+ * @brief ecore_chain_init_next_ptr_elem -
+ *
+ * Initalizes a next pointer element
+ *
+ * @param p_chain
+ * @param p_virt_curr virtual address of a chain page of which the next
+ * pointer element is initialized
+ * @param p_virt_next virtual address of the next chain page
+ * @param p_phys_next physical address of the next chain page
+ *
+ */
+static OSAL_INLINE void
+ecore_chain_init_next_ptr_elem(struct ecore_chain *p_chain, void *p_virt_curr,
+ void *p_virt_next, dma_addr_t p_phys_next)
+{
+ struct ecore_chain_next *p_next;
+ u32 size;
+
+ size = p_chain->elem_size * p_chain->usable_per_page;
+ p_next = (struct ecore_chain_next *)((u8 *)p_virt_curr + size);
+
+ DMA_REGPAIR_LE(p_next->next_phys, p_phys_next);
+
+ p_next->next_virt = p_virt_next;
+}
+
+/**
+ * @brief ecore_chain_get_last_elem -
+ *
+ * Returns a pointer to the last element of the chain
+ *
+ * @param p_chain
+ *
+ * @return void*
+ */
+static OSAL_INLINE void *ecore_chain_get_last_elem(struct ecore_chain *p_chain)
+{
+ struct ecore_chain_next *p_next = OSAL_NULL;
+ void *p_virt_addr = OSAL_NULL;
+ u32 size, last_page_idx;
+
+ if (!p_chain->p_virt_addr)
+ goto out;
+
+ switch (p_chain->mode) {
+ case ECORE_CHAIN_MODE_NEXT_PTR:
+ size = p_chain->elem_size * p_chain->usable_per_page;
+ p_virt_addr = p_chain->p_virt_addr;
+ p_next = (struct ecore_chain_next *)((u8 *)p_virt_addr + size);
+ while (p_next->next_virt != p_chain->p_virt_addr) {
+ p_virt_addr = p_next->next_virt;
+ p_next =
+ (struct ecore_chain_next *)((u8 *)p_virt_addr +
+ size);
+ }
+ break;
+ case ECORE_CHAIN_MODE_SINGLE:
+ p_virt_addr = p_chain->p_virt_addr;
+ break;
+ case ECORE_CHAIN_MODE_PBL:
+ last_page_idx = p_chain->page_cnt - 1;
+ p_virt_addr = p_chain->pbl.pp_virt_addr_tbl[last_page_idx];
+ break;
+ }
+ /* p_virt_addr points at this stage to the last page of the chain */
+ size = p_chain->elem_size * (p_chain->usable_per_page - 1);
+ p_virt_addr = ((u8 *)p_virt_addr + size);
+out:
+ return p_virt_addr;
+}
+
+/**
+ * @brief ecore_chain_set_prod - sets the prod to the given value
+ *
+ * @param prod_idx
+ * @param p_prod_elem
+ */
+static OSAL_INLINE void ecore_chain_set_prod(struct ecore_chain *p_chain,
+ u32 prod_idx, void *p_prod_elem)
+{
+ if (is_chain_u16(p_chain))
+ p_chain->u.chain16.prod_idx = (u16)prod_idx;
+ else
+ p_chain->u.chain32.prod_idx = prod_idx;
+ p_chain->p_prod_elem = p_prod_elem;
+}
+
+/**
+ * @brief ecore_chain_pbl_zero_mem - set chain memory to 0
+ *
+ * @param p_chain
+ */
+static OSAL_INLINE void ecore_chain_pbl_zero_mem(struct ecore_chain *p_chain)
+{
+ u32 i, page_cnt;
+
+ if (p_chain->mode != ECORE_CHAIN_MODE_PBL)
+ return;
+
+ page_cnt = ecore_chain_get_page_cnt(p_chain);
+
+ for (i = 0; i < page_cnt; i++)
+ OSAL_MEM_ZERO(p_chain->pbl.pp_virt_addr_tbl[i],
+ ECORE_CHAIN_PAGE_SIZE);
+}
+
+#endif /* __ECORE_CHAIN_H__ */
Code Review / deb_dpdk.git / blobdiff