-/*
- * Copyright (c) 2016 QLogic Corporation.
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright (c) 2016 - 2018 Cavium Inc.
* All rights reserved.
- * www.qlogic.com
- *
- * See LICENSE.qede_pmd for copyright and licensing details.
+ * www.cavium.com
*/
#ifndef __ECORE_CHAIN_H__
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_ext_pbl {
+ dma_addr_t p_pbl_phys;
+ void *p_pbl_virt;
};
struct ecore_chain_u16 {
};
struct ecore_chain {
- /* Address of first page of the chain */
- void *p_virt_addr;
- dma_addr_t p_phys_addr;
-
+ /* fastpath portion of the chain - required for commands such
+ * as produce / consume.
+ */
/* 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;
+ /* Fastpath portions of the PBL [if exists] */
+
+ struct {
+ /* Table for keeping the virtual addresses of the chain pages,
+ * respectively to the physical addresses in the pbl table.
+ */
+ void **pp_virt_addr_tbl;
+
+ union {
+ struct ecore_chain_pbl_u16 u16;
+ struct ecore_chain_pbl_u32 u32;
+ } c;
+ } pbl;
- enum ecore_chain_cnt_type cnt_type;
union {
struct ecore_chain_u16 chain16;
struct ecore_chain_u32 chain32;
} u;
- u32 page_cnt;
+ /* Capacity counts only usable elements */
+ u32 capacity;
+ u32 page_cnt;
- /* Number of elements - capacity is for usable elements only,
- * while size will contain total number of elements [for entire chain].
+ /* A u8 would suffice for mode, but it would save as a lot of headaches
+ * on castings & defaults.
*/
- u32 capacity;
- u32 size;
+ enum ecore_chain_mode mode;
/* 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;
+ u16 usable_per_page;
+ u8 elem_unusable;
+
+ u8 cnt_type;
+
+ /* Slowpath of the chain - required for initialization and destruction,
+ * but isn't involved in regular functionality.
+ */
+
+ /* Base address of a pre-allocated buffer for pbl */
+ struct {
+ dma_addr_t p_phys_table;
+ void *p_virt_table;
+ } pbl_sp;
+
+ /* Address of first page of the chain - the address is required
+ * for fastpath operation [consume/produce] but only for the SINGLE
+ * flavour which isn't considered fastpath [== SPQ].
+ */
+ void *p_virt_addr;
+ dma_addr_t p_phys_addr;
- struct ecore_chain_pbl pbl;
+ /* Total number of elements [for entire chain] */
+ u32 size;
+
+ u8 intended_use;
+
+ /* TBD - do we really need this? Couldn't find usage for it */
+ bool b_external_pbl;
void *dp_ctx;
};
#define UNUSABLE_ELEMS_PER_PAGE(elem_size, mode) \
((mode == ECORE_CHAIN_MODE_NEXT_PTR) ? \
- (1 + ((sizeof(struct ecore_chain_next) - 1) / \
- (elem_size))) : 0)
+ (u8)(1 + ((sizeof(struct ecore_chain_next) - 1) / \
+ (elem_size))) : 0)
#define USABLE_ELEMS_PER_PAGE(elem_size, mode) \
((u32)(ELEMS_PER_PAGE(elem_size) - \
}
static OSAL_INLINE
-u16 ecore_chain_get_unusable_per_page(struct ecore_chain *p_chain)
+u8 ecore_chain_get_unusable_per_page(struct ecore_chain *p_chain)
{
return p_chain->elem_unusable;
}
static OSAL_INLINE
dma_addr_t ecore_chain_get_pbl_phys(struct ecore_chain *p_chain)
{
- return p_chain->pbl.p_phys_table;
+ return p_chain->pbl_sp.p_phys_table;
}
/**
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;
+ *(u16 *)idx_to_inc += (u16)p_chain->elem_unusable;
else
- *(u32 *)idx_to_inc += p_chain->elem_unusable;
+ *(u32 *)idx_to_inc += (u16)p_chain->elem_unusable;
break;
case ECORE_CHAIN_MODE_SINGLE:
*p_next_elem = p_chain->p_virt_addr;
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;
+ p_prod_page_idx = &p_chain->pbl.c.u16.prod_page_idx;
ecore_chain_advance_page(p_chain, &p_chain->p_prod_elem,
p_prod_idx, p_prod_page_idx);
}
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;
+ p_prod_page_idx = &p_chain->pbl.c.u32.prod_page_idx;
ecore_chain_advance_page(p_chain, &p_chain->p_prod_elem,
p_prod_idx, p_prod_page_idx);
}
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;
+ p_cons_page_idx = &p_chain->pbl.c.u16.cons_page_idx;
ecore_chain_advance_page(p_chain, &p_chain->p_cons_elem,
p_cons_idx, p_cons_page_idx);
}
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;
+ p_cons_page_idx = &p_chain->pbl.c.u32.cons_page_idx;
ecore_chain_advance_page(p_chain, &p_chain->p_cons_elem,
p_cons_idx, p_cons_page_idx);
}
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
+ /* 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;
+ p_chain->pbl.c.u16.prod_page_idx = (u16)reset_val;
+ p_chain->pbl.c.u16.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;
+ p_chain->pbl.c.u32.prod_page_idx = reset_val;
+ p_chain->pbl.c.u32.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++)
+ /* produce empty elements */
+ for (i = 0; i < p_chain->capacity; i++)
ecore_chain_recycle_consumed(p_chain);
- break;
+ break;
+
+ case ECORE_CHAIN_USE_TO_CONSUME_PRODUCE:
+ case ECORE_CHAIN_USE_TO_PRODUCE:
+ default:
+ /* Do nothing */
+ break;
}
}
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->intended_use = (u8)intended_use;
p_chain->mode = mode;
- p_chain->cnt_type = cnt_type;
+ p_chain->cnt_type = (u8)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->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->b_external_pbl = false;
+ p_chain->pbl_sp.p_phys_table = 0;
+ p_chain->pbl_sp.p_virt_table = OSAL_NULL;
p_chain->pbl.pp_virt_addr_tbl = OSAL_NULL;
p_chain->dp_ctx = dp_ctx;
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_sp.p_phys_table = p_phys_pbl;
+ p_chain->pbl_sp.p_virt_table = p_virt_pbl;
p_chain->pbl.pp_virt_addr_tbl = pp_virt_addr_tbl;
}
static OSAL_INLINE void ecore_chain_set_prod(struct ecore_chain *p_chain,
u32 prod_idx, void *p_prod_elem)
{
+ if (p_chain->mode == ECORE_CHAIN_MODE_PBL) {
+ /* Use "prod_idx-1" since ecore_chain_produce() advances the
+ * page index before the producer index when getting to
+ * "next_page_mask".
+ */
+ u32 elem_idx =
+ (prod_idx - 1 + p_chain->capacity) % p_chain->capacity;
+ u32 page_idx = elem_idx / p_chain->elem_per_page;
+
+ if (is_chain_u16(p_chain))
+ p_chain->pbl.c.u16.prod_page_idx = (u16)page_idx;
+ else
+ p_chain->pbl.c.u32.prod_page_idx = page_idx;
+ }
+
if (is_chain_u16(p_chain))
p_chain->u.chain16.prod_idx = (u16)prod_idx;
else
p_chain->p_prod_elem = p_prod_elem;
}
+/**
+ * @brief ecore_chain_set_cons - sets the cons to the given value
+ *
+ * @param cons_idx
+ * @param p_cons_elem
+ */
+static OSAL_INLINE void ecore_chain_set_cons(struct ecore_chain *p_chain,
+ u32 cons_idx, void *p_cons_elem)
+{
+ if (p_chain->mode == ECORE_CHAIN_MODE_PBL) {
+ /* Use "cons_idx-1" since ecore_chain_consume() advances the
+ * page index before the consumer index when getting to
+ * "next_page_mask".
+ */
+ u32 elem_idx =
+ (cons_idx - 1 + p_chain->capacity) % p_chain->capacity;
+ u32 page_idx = elem_idx / p_chain->elem_per_page;
+
+ if (is_chain_u16(p_chain))
+ p_chain->pbl.c.u16.cons_page_idx = (u16)page_idx;
+ else
+ p_chain->pbl.c.u32.cons_page_idx = page_idx;
+ }
+
+ if (is_chain_u16(p_chain))
+ p_chain->u.chain16.cons_idx = (u16)cons_idx;
+ else
+ p_chain->u.chain32.cons_idx = cons_idx;
+
+ p_chain->p_cons_elem = p_cons_elem;
+}
+
/**
* @brief ecore_chain_pbl_zero_mem - set chain memory to 0
*
Code Review / deb_dpdk.git / blobdiff