[PATCH cryptodev-2.6 3/4] crypto: cavium/nitrox - NITROX command queue changes.

[Srikanth Jampala]

Use node based allocations for queues. consider the dma address
alignment changes, while calculating the queue base address.
added checks in cleanup functions. Minor changes to queue variable names

Signed-off-by: Srikanth Jampala <Jampala.Srikanth@xxxxxxxxxx>
Reviewed-by: Gadam Sreerama <sgadam@xxxxxxxxxx>
---
 drivers/crypto/cavium/nitrox/nitrox_dev.h    | 55 ++++++------
 drivers/crypto/cavium/nitrox/nitrox_hal.c    |  2 +-
 drivers/crypto/cavium/nitrox/nitrox_isr.c    |  2 +-
 drivers/crypto/cavium/nitrox/nitrox_lib.c    | 90 +++++++++++---------
 drivers/crypto/cavium/nitrox/nitrox_reqmgr.c | 24 +++---
 5 files changed, 94 insertions(+), 79 deletions(-)

diff --git a/drivers/crypto/cavium/nitrox/nitrox_dev.h b/drivers/crypto/cavium/nitrox/nitrox_dev.h
index abb5c8ac54e5..62fb75923bfe 100644
--- a/drivers/crypto/cavium/nitrox/nitrox_dev.h
+++ b/drivers/crypto/cavium/nitrox/nitrox_dev.h
@@ -9,44 +9,51 @@
 
 #define VERSION_LEN 32
 
+/**
+ * struct nitrox_cmdq - NITROX command queue
+ * @cmd_qlock: command queue lock
+ * @resp_qlock: response queue lock
+ * @backlog_qlock: backlog queue lock
+ * @ndev: NITROX device
+ * @response_head: submitted request list
+ * @backlog_head: backlog queue
+ * @dbell_csr_addr: doorbell register address for this queue
+ * @base: command queue base address
+ * @dma: dma address of the base
+ * @pending_count: request pending at device
+ * @backlog_count: backlog request count
+ * @write_idx: next write index for the command
+ * @instr_size: command size
+ * @qno: command queue number
+ * @qsize: command queue size
+ * @unalign_base: unaligned base address
+ * @unalign_dma: unaligned dma address
+ */
 struct nitrox_cmdq {
-	/* command queue lock */
-	spinlock_t cmdq_lock;
-	/* response list lock */
-	spinlock_t response_lock;
-	/* backlog list lock */
-	spinlock_t backlog_lock;
-
-	/* request submitted to chip, in progress */
+	spinlock_t cmd_qlock;
+	spinlock_t resp_qlock;
+	spinlock_t backlog_qlock;
+
+	struct nitrox_device *ndev;
 	struct list_head response_head;
-	/* hw queue full, hold in backlog list */
 	struct list_head backlog_head;
 
-	/* doorbell address */
 	u8 __iomem *dbell_csr_addr;
-	/* base address of the queue */
-	u8 *head;
+	u8 *base;
+	dma_addr_t dma;
 
-	struct nitrox_device *ndev;
-	/* flush pending backlog commands */
 	struct work_struct backlog_qflush;
 
-	/* requests posted waiting for completion */
 	atomic_t pending_count;
-	/* requests in backlog queues */
 	atomic_t backlog_count;
 
 	int write_idx;
-	/* command size 32B/64B */
 	u8 instr_size;
 	u8 qno;
 	u32 qsize;
 
-	/* unaligned addresses */
-	u8 *head_unaligned;
-	dma_addr_t dma_unaligned;
-	/* dma address of the base */
-	dma_addr_t dma;
+	u8 *unalign_base;
+	dma_addr_t unalign_dma;
 };
 
 /**
@@ -152,7 +159,7 @@ enum vf_mode {
  * @nr_queues: Number of command queues
  * @mode: Device mode PF/VF
  * @ctx_pool: DMA pool for crypto context
- * @pkt_cmdqs: SE Command queues
+ * @pkt_inq: Packet input rings
  * @msix: MSI-X information
  * @bh: post processing work
  * @hw: hardware information
@@ -177,7 +184,7 @@ struct nitrox_device {
 	enum vf_mode mode;
 
 	struct dma_pool *ctx_pool;
-	struct nitrox_cmdq *pkt_cmdqs;
+	struct nitrox_cmdq *pkt_inq;
 
 	struct nitrox_msix msix;
 	struct nitrox_bh bh;
diff --git a/drivers/crypto/cavium/nitrox/nitrox_hal.c b/drivers/crypto/cavium/nitrox/nitrox_hal.c
index 4627a1976176..a9b82387cf53 100644
--- a/drivers/crypto/cavium/nitrox/nitrox_hal.c
+++ b/drivers/crypto/cavium/nitrox/nitrox_hal.c
@@ -119,7 +119,7 @@ void nitrox_config_pkt_input_rings(struct nitrox_device *ndev)
 	int i;
 
 	for (i = 0; i < ndev->nr_queues; i++) {
-		struct nitrox_cmdq *cmdq = &ndev->pkt_cmdqs[i];
+		struct nitrox_cmdq *cmdq = &ndev->pkt_inq[i];
 		union nps_pkt_in_instr_rsize pkt_in_rsize;
 		u64 offset;
 
diff --git a/drivers/crypto/cavium/nitrox/nitrox_isr.c b/drivers/crypto/cavium/nitrox/nitrox_isr.c
index 4f4334929f35..baeacacbddbe 100644
--- a/drivers/crypto/cavium/nitrox/nitrox_isr.c
+++ b/drivers/crypto/cavium/nitrox/nitrox_isr.c
@@ -335,7 +335,7 @@ static int nitrox_setup_pkt_slc_bh(struct nitrox_device *ndev)
 		offset = NPS_PKT_SLC_CNTSX(i);
 		/* pre calculate completion count address */
 		bh->completion_cnt_csr_addr = NITROX_CSR_ADDR(ndev, offset);
-		bh->cmdq = &ndev->pkt_cmdqs[i];
+		bh->cmdq = &ndev->pkt_inq[i];
 
 		tasklet_init(&bh->resp_handler, pkt_slc_resp_handler,
 			     (unsigned long)bh);
diff --git a/drivers/crypto/cavium/nitrox/nitrox_lib.c b/drivers/crypto/cavium/nitrox/nitrox_lib.c
index 7a721c7c12a4..ed08aa9380ee 100644
--- a/drivers/crypto/cavium/nitrox/nitrox_lib.c
+++ b/drivers/crypto/cavium/nitrox/nitrox_lib.c
@@ -17,30 +17,27 @@
 
 #define CRYPTO_CTX_SIZE	256
 
-/* command queue alignments */
-#define PKT_IN_ALIGN	16
+/* packet inuput ring alignments */
+#define PKTIN_Q_ALIGN_BYTES 16
 
-static int cmdq_common_init(struct nitrox_cmdq *cmdq)
+static int nitrox_cmdq_init(struct nitrox_cmdq *cmdq, int align_bytes)
 {
 	struct nitrox_device *ndev = cmdq->ndev;
-	u32 qsize;
-
-	qsize = (ndev->qlen) * cmdq->instr_size;
-	cmdq->head_unaligned = dma_zalloc_coherent(DEV(ndev),
-						   (qsize + PKT_IN_ALIGN),
-						   &cmdq->dma_unaligned,
-						   GFP_KERNEL);
-	if (!cmdq->head_unaligned)
+
+	cmdq->qsize = (ndev->qlen * cmdq->instr_size) + align_bytes;
+	cmdq->unalign_base = dma_zalloc_coherent(DEV(ndev), cmdq->qsize,
+						 &cmdq->unalign_dma,
+						 GFP_KERNEL);
+	if (!cmdq->unalign_base)
 		return -ENOMEM;
 
-	cmdq->head = PTR_ALIGN(cmdq->head_unaligned, PKT_IN_ALIGN);
-	cmdq->dma = PTR_ALIGN(cmdq->dma_unaligned, PKT_IN_ALIGN);
-	cmdq->qsize = (qsize + PKT_IN_ALIGN);
+	cmdq->dma = PTR_ALIGN(cmdq->unalign_dma, align_bytes);
+	cmdq->base = cmdq->unalign_base + (cmdq->dma - cmdq->unalign_dma);
 	cmdq->write_idx = 0;
 
-	spin_lock_init(&cmdq->response_lock);
-	spin_lock_init(&cmdq->cmdq_lock);
-	spin_lock_init(&cmdq->backlog_lock);
+	spin_lock_init(&cmdq->cmd_qlock);
+	spin_lock_init(&cmdq->resp_qlock);
+	spin_lock_init(&cmdq->backlog_qlock);
 
 	INIT_LIST_HEAD(&cmdq->response_head);
 	INIT_LIST_HEAD(&cmdq->backlog_head);
@@ -51,68 +48,79 @@ static int cmdq_common_init(struct nitrox_cmdq *cmdq)
 	return 0;
 }
 
-static void cmdq_common_cleanup(struct nitrox_cmdq *cmdq)
+static void nitrox_cmdq_reset(struct nitrox_cmdq *cmdq)
+{
+	cmdq->write_idx = 0;
+	atomic_set(&cmdq->pending_count, 0);
+	atomic_set(&cmdq->backlog_count, 0);
+}
+
+static void nitrox_cmdq_cleanup(struct nitrox_cmdq *cmdq)
 {
 	struct nitrox_device *ndev = cmdq->ndev;
 
+	if (!cmdq->unalign_base)
+		return;
+
 	cancel_work_sync(&cmdq->backlog_qflush);
 
 	dma_free_coherent(DEV(ndev), cmdq->qsize,
-			  cmdq->head_unaligned, cmdq->dma_unaligned);
-
-	atomic_set(&cmdq->pending_count, 0);
-	atomic_set(&cmdq->backlog_count, 0);
+			  cmdq->unalign_base, cmdq->unalign_dma);
+	nitrox_cmdq_reset(cmdq);
 
 	cmdq->dbell_csr_addr = NULL;
-	cmdq->head = NULL;
+	cmdq->unalign_base = NULL;
+	cmdq->base = NULL;
+	cmdq->unalign_dma = 0;
 	cmdq->dma = 0;
 	cmdq->qsize = 0;
 	cmdq->instr_size = 0;
 }
 
-static void nitrox_cleanup_pkt_cmdqs(struct nitrox_device *ndev)
+static void nitrox_free_pktin_queues(struct nitrox_device *ndev)
 {
 	int i;
 
 	for (i = 0; i < ndev->nr_queues; i++) {
-		struct nitrox_cmdq *cmdq = &ndev->pkt_cmdqs[i];
+		struct nitrox_cmdq *cmdq = &ndev->pkt_inq[i];
 
-		cmdq_common_cleanup(cmdq);
+		nitrox_cmdq_cleanup(cmdq);
 	}
-	kfree(ndev->pkt_cmdqs);
-	ndev->pkt_cmdqs = NULL;
+	kfree(ndev->pkt_inq);
+	ndev->pkt_inq = NULL;
 }
 
-static int nitrox_init_pkt_cmdqs(struct nitrox_device *ndev)
+static int nitrox_alloc_pktin_queues(struct nitrox_device *ndev)
 {
-	int i, err, size;
+	int i, err;
 
-	size = ndev->nr_queues * sizeof(struct nitrox_cmdq);
-	ndev->pkt_cmdqs = kzalloc(size, GFP_KERNEL);
-	if (!ndev->pkt_cmdqs)
+	ndev->pkt_inq = kcalloc_node(ndev->nr_queues,
+				     sizeof(struct nitrox_cmdq),
+				     GFP_KERNEL, ndev->node);
+	if (!ndev->pkt_inq)
 		return -ENOMEM;
 
 	for (i = 0; i < ndev->nr_queues; i++) {
 		struct nitrox_cmdq *cmdq;
 		u64 offset;
 
-		cmdq = &ndev->pkt_cmdqs[i];
+		cmdq = &ndev->pkt_inq[i];
 		cmdq->ndev = ndev;
 		cmdq->qno = i;
 		cmdq->instr_size = sizeof(struct nps_pkt_instr);
 
+		/* packet input ring doorbell address */
 		offset = NPS_PKT_IN_INSTR_BAOFF_DBELLX(i);
-		/* SE ring doorbell address for this queue */
 		cmdq->dbell_csr_addr = NITROX_CSR_ADDR(ndev, offset);
 
-		err = cmdq_common_init(cmdq);
+		err = nitrox_cmdq_init(cmdq, PKTIN_Q_ALIGN_BYTES);
 		if (err)
-			goto pkt_cmdq_fail;
+			goto pktq_fail;
 	}
 	return 0;
 
-pkt_cmdq_fail:
-	nitrox_cleanup_pkt_cmdqs(ndev);
+pktq_fail:
+	nitrox_free_pktin_queues(ndev);
 	return err;
 }
 
@@ -194,7 +202,7 @@ int nitrox_common_sw_init(struct nitrox_device *ndev)
 	if (err)
 		return err;
 
-	err = nitrox_init_pkt_cmdqs(ndev);
+	err = nitrox_alloc_pktin_queues(ndev);
 	if (err)
 		destroy_crypto_dma_pool(ndev);
 
@@ -207,6 +215,6 @@ int nitrox_common_sw_init(struct nitrox_device *ndev)
  */
 void nitrox_common_sw_cleanup(struct nitrox_device *ndev)
 {
-	nitrox_cleanup_pkt_cmdqs(ndev);
+	nitrox_free_pktin_queues(ndev);
 	destroy_crypto_dma_pool(ndev);
 }
diff --git a/drivers/crypto/cavium/nitrox/nitrox_reqmgr.c b/drivers/crypto/cavium/nitrox/nitrox_reqmgr.c
index f325b48ba904..d606c7af4667 100644
--- a/drivers/crypto/cavium/nitrox/nitrox_reqmgr.c
+++ b/drivers/crypto/cavium/nitrox/nitrox_reqmgr.c
@@ -382,11 +382,11 @@ static inline void backlog_list_add(struct nitrox_softreq *sr,
 {
 	INIT_LIST_HEAD(&sr->backlog);
 
-	spin_lock_bh(&cmdq->backlog_lock);
+	spin_lock_bh(&cmdq->backlog_qlock);
 	list_add_tail(&sr->backlog, &cmdq->backlog_head);
 	atomic_inc(&cmdq->backlog_count);
 	atomic_set(&sr->status, REQ_BACKLOG);
-	spin_unlock_bh(&cmdq->backlog_lock);
+	spin_unlock_bh(&cmdq->backlog_qlock);
 }
 
 static inline void response_list_add(struct nitrox_softreq *sr,
@@ -394,17 +394,17 @@ static inline void response_list_add(struct nitrox_softreq *sr,
 {
 	INIT_LIST_HEAD(&sr->response);
 
-	spin_lock_bh(&cmdq->response_lock);
+	spin_lock_bh(&cmdq->resp_qlock);
 	list_add_tail(&sr->response, &cmdq->response_head);
-	spin_unlock_bh(&cmdq->response_lock);
+	spin_unlock_bh(&cmdq->resp_qlock);
 }
 
 static inline void response_list_del(struct nitrox_softreq *sr,
 				     struct nitrox_cmdq *cmdq)
 {
-	spin_lock_bh(&cmdq->response_lock);
+	spin_lock_bh(&cmdq->resp_qlock);
 	list_del(&sr->response);
-	spin_unlock_bh(&cmdq->response_lock);
+	spin_unlock_bh(&cmdq->resp_qlock);
 }
 
 static struct nitrox_softreq *
@@ -439,11 +439,11 @@ static void post_se_instr(struct nitrox_softreq *sr,
 	int idx;
 	u8 *ent;
 
-	spin_lock_bh(&cmdq->cmdq_lock);
+	spin_lock_bh(&cmdq->cmd_qlock);
 
 	idx = cmdq->write_idx;
 	/* copy the instruction */
-	ent = cmdq->head + (idx * cmdq->instr_size);
+	ent = cmdq->base + (idx * cmdq->instr_size);
 	memcpy(ent, &sr->instr, cmdq->instr_size);
 
 	atomic_set(&sr->status, REQ_POSTED);
@@ -459,7 +459,7 @@ static void post_se_instr(struct nitrox_softreq *sr,
 
 	cmdq->write_idx = incr_index(idx, 1, ndev->qlen);
 
-	spin_unlock_bh(&cmdq->cmdq_lock);
+	spin_unlock_bh(&cmdq->cmd_qlock);
 
 	/* increment the posted command count */
 	atomic64_inc(&ndev->stats.posted);
@@ -474,7 +474,7 @@ static int post_backlog_cmds(struct nitrox_cmdq *cmdq)
 	if (!atomic_read(&cmdq->backlog_count))
 		return 0;
 
-	spin_lock_bh(&cmdq->backlog_lock);
+	spin_lock_bh(&cmdq->backlog_qlock);
 
 	list_for_each_entry_safe(sr, tmp, &cmdq->backlog_head, backlog) {
 		struct skcipher_request *skreq;
@@ -497,7 +497,7 @@ static int post_backlog_cmds(struct nitrox_cmdq *cmdq)
 		/* backlog requests are posted, wakeup with -EINPROGRESS */
 		skcipher_request_complete(skreq, -EINPROGRESS);
 	}
-	spin_unlock_bh(&cmdq->backlog_lock);
+	spin_unlock_bh(&cmdq->backlog_qlock);
 
 	return ret;
 }
@@ -578,7 +578,7 @@ int nitrox_process_se_request(struct nitrox_device *ndev,
 	/* select the queue */
 	qno = smp_processor_id() % ndev->nr_queues;
 
-	sr->cmdq = &ndev->pkt_cmdqs[qno];
+	sr->cmdq = &ndev->pkt_inq[qno];
 
 	/*
 	 * 64-Byte Instruction Format
-- 
2.17.1