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Subject[PATCH v2 05/16] dmaengine: bcm-sba-raid: Remove redundant resp_dma from sba_request
Date
Both resp and resp_dma are redundant in sba_request because
resp is unused and resp_dma carries same information present
in tx.phys of sba_request. This patch removes both resp and
resp_dma from sba_request.

Signed-off-by: Anup Patel <anup.patel@broadcom.com>
---
drivers/dma/bcm-sba-raid.c | 34 +++++++++++++++++-----------------
1 file changed, 17 insertions(+), 17 deletions(-)

diff --git a/drivers/dma/bcm-sba-raid.c b/drivers/dma/bcm-sba-raid.c
index e8863e9..7d08d4e 100644
--- a/drivers/dma/bcm-sba-raid.c
+++ b/drivers/dma/bcm-sba-raid.c
@@ -113,8 +113,6 @@ struct sba_request {
struct list_head next;
atomic_t next_pending_count;
/* BRCM message data */
- void *resp;
- dma_addr_t resp_dma;
struct brcm_sba_command *cmds;
struct brcm_message msg;
struct dma_async_tx_descriptor tx;
@@ -513,6 +511,7 @@ static void sba_fillup_interrupt_msg(struct sba_request *req,
{
u64 cmd;
u32 c_mdata;
+ dma_addr_t resp_dma = req->tx.phys;
struct brcm_sba_command *cmdsp = cmds;

/* Type-B command to load dummy data into buf0 */
@@ -528,7 +527,7 @@ static void sba_fillup_interrupt_msg(struct sba_request *req,
cmdsp->cmd = cmd;
*cmdsp->cmd_dma = cpu_to_le64(cmd);
cmdsp->flags = BRCM_SBA_CMD_TYPE_B;
- cmdsp->data = req->resp_dma;
+ cmdsp->data = resp_dma;
cmdsp->data_len = req->sba->hw_resp_size;
cmdsp++;

@@ -549,11 +548,11 @@ static void sba_fillup_interrupt_msg(struct sba_request *req,
cmdsp->flags = BRCM_SBA_CMD_TYPE_A;
if (req->sba->hw_resp_size) {
cmdsp->flags |= BRCM_SBA_CMD_HAS_RESP;
- cmdsp->resp = req->resp_dma;
+ cmdsp->resp = resp_dma;
cmdsp->resp_len = req->sba->hw_resp_size;
}
cmdsp->flags |= BRCM_SBA_CMD_HAS_OUTPUT;
- cmdsp->data = req->resp_dma;
+ cmdsp->data = resp_dma;
cmdsp->data_len = req->sba->hw_resp_size;
cmdsp++;

@@ -600,6 +599,7 @@ static void sba_fillup_memcpy_msg(struct sba_request *req,
{
u64 cmd;
u32 c_mdata;
+ dma_addr_t resp_dma = req->tx.phys;
struct brcm_sba_command *cmdsp = cmds;

/* Type-B command to load data into buf0 */
@@ -636,7 +636,7 @@ static void sba_fillup_memcpy_msg(struct sba_request *req,
cmdsp->flags = BRCM_SBA_CMD_TYPE_A;
if (req->sba->hw_resp_size) {
cmdsp->flags |= BRCM_SBA_CMD_HAS_RESP;
- cmdsp->resp = req->resp_dma;
+ cmdsp->resp = resp_dma;
cmdsp->resp_len = req->sba->hw_resp_size;
}
cmdsp->flags |= BRCM_SBA_CMD_HAS_OUTPUT;
@@ -719,6 +719,7 @@ static void sba_fillup_xor_msg(struct sba_request *req,
u64 cmd;
u32 c_mdata;
unsigned int i;
+ dma_addr_t resp_dma = req->tx.phys;
struct brcm_sba_command *cmdsp = cmds;

/* Type-B command to load data into buf0 */
@@ -774,7 +775,7 @@ static void sba_fillup_xor_msg(struct sba_request *req,
cmdsp->flags = BRCM_SBA_CMD_TYPE_A;
if (req->sba->hw_resp_size) {
cmdsp->flags |= BRCM_SBA_CMD_HAS_RESP;
- cmdsp->resp = req->resp_dma;
+ cmdsp->resp = resp_dma;
cmdsp->resp_len = req->sba->hw_resp_size;
}
cmdsp->flags |= BRCM_SBA_CMD_HAS_OUTPUT;
@@ -863,6 +864,7 @@ static void sba_fillup_pq_msg(struct sba_request *req,
u64 cmd;
u32 c_mdata;
unsigned int i;
+ dma_addr_t resp_dma = req->tx.phys;
struct brcm_sba_command *cmdsp = cmds;

if (pq_continue) {
@@ -956,7 +958,7 @@ static void sba_fillup_pq_msg(struct sba_request *req,
cmdsp->flags = BRCM_SBA_CMD_TYPE_A;
if (req->sba->hw_resp_size) {
cmdsp->flags |= BRCM_SBA_CMD_HAS_RESP;
- cmdsp->resp = req->resp_dma;
+ cmdsp->resp = resp_dma;
cmdsp->resp_len = req->sba->hw_resp_size;
}
cmdsp->flags |= BRCM_SBA_CMD_HAS_OUTPUT;
@@ -983,7 +985,7 @@ static void sba_fillup_pq_msg(struct sba_request *req,
cmdsp->flags = BRCM_SBA_CMD_TYPE_A;
if (req->sba->hw_resp_size) {
cmdsp->flags |= BRCM_SBA_CMD_HAS_RESP;
- cmdsp->resp = req->resp_dma;
+ cmdsp->resp = resp_dma;
cmdsp->resp_len = req->sba->hw_resp_size;
}
cmdsp->flags |= BRCM_SBA_CMD_HAS_OUTPUT;
@@ -1037,6 +1039,7 @@ static void sba_fillup_pq_single_msg(struct sba_request *req,
u64 cmd;
u32 c_mdata;
u8 pos, dpos = raid6_gflog[scf];
+ dma_addr_t resp_dma = req->tx.phys;
struct brcm_sba_command *cmdsp = cmds;

if (!dst_p)
@@ -1115,7 +1118,7 @@ static void sba_fillup_pq_single_msg(struct sba_request *req,
cmdsp->flags = BRCM_SBA_CMD_TYPE_A;
if (req->sba->hw_resp_size) {
cmdsp->flags |= BRCM_SBA_CMD_HAS_RESP;
- cmdsp->resp = req->resp_dma;
+ cmdsp->resp = resp_dma;
cmdsp->resp_len = req->sba->hw_resp_size;
}
cmdsp->flags |= BRCM_SBA_CMD_HAS_OUTPUT;
@@ -1236,7 +1239,7 @@ static void sba_fillup_pq_single_msg(struct sba_request *req,
cmdsp->flags = BRCM_SBA_CMD_TYPE_A;
if (req->sba->hw_resp_size) {
cmdsp->flags |= BRCM_SBA_CMD_HAS_RESP;
- cmdsp->resp = req->resp_dma;
+ cmdsp->resp = resp_dma;
cmdsp->resp_len = req->sba->hw_resp_size;
}
cmdsp->flags |= BRCM_SBA_CMD_HAS_OUTPUT;
@@ -1458,7 +1461,7 @@ static void sba_receive_message(struct mbox_client *cl, void *msg)

static int sba_prealloc_channel_resources(struct sba_device *sba)
{
- int i, j, p, ret = 0;
+ int i, j, ret = 0;
struct sba_request *req = NULL;

sba->resp_base = dma_alloc_coherent(sba->dma_dev.dev,
@@ -1492,16 +1495,13 @@ static int sba_prealloc_channel_resources(struct sba_device *sba)
goto fail_free_cmds_pool;
}

- for (i = 0, p = 0; i < sba->max_req; i++) {
+ for (i = 0; i < sba->max_req; i++) {
req = &sba->reqs[i];
INIT_LIST_HEAD(&req->node);
req->sba = sba;
req->flags = SBA_REQUEST_STATE_FREE;
INIT_LIST_HEAD(&req->next);
atomic_set(&req->next_pending_count, 0);
- req->resp = sba->resp_base + p;
- req->resp_dma = sba->resp_dma_base + p;
- p += sba->hw_resp_size;
req->cmds = devm_kcalloc(sba->dev, sba->max_cmd_per_req,
sizeof(*req->cmds), GFP_KERNEL);
if (!req->cmds) {
@@ -1519,7 +1519,7 @@ static int sba_prealloc_channel_resources(struct sba_device *sba)
memset(&req->msg, 0, sizeof(req->msg));
dma_async_tx_descriptor_init(&req->tx, &sba->dma_chan);
req->tx.tx_submit = sba_tx_submit;
- req->tx.phys = req->resp_dma;
+ req->tx.phys = sba->resp_dma_base + i * sba->hw_resp_size;
list_add_tail(&req->node, &sba->reqs_free_list);
}

--
2.7.4
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