crypto: cavium/nitrox - Allocate asymmetric crypto command queues

This patch adds support to allocate CNN55XX device AQMQ command queues
required for submitting asymmetric crypto requests.
Signed-off-by: Phani Kiran Hemadri <phemadri@marvell.com>
Reviewed-by: Srikanth Jampala <jsrikanth@marvell.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/cavium/nitrox/nitrox_dev.h

@@ -10,6 +10,8 @@
 #define VERSION_LEN 32
 /* Maximum queues in PF mode */
 #define MAX_PF_QUEUES	64
+/* Maximum device queues */
+#define MAX_DEV_QUEUES (MAX_PF_QUEUES)
 /* Maximum UCD Blocks */
 #define CNN55XX_MAX_UCD_BLOCKS	8
 
@@ -208,6 +210,7 @@ enum vf_mode {
  * @mode: Device mode PF/VF
  * @ctx_pool: DMA pool for crypto context
  * @pkt_inq: Packet input rings
+ * @aqmq: AQM command queues
  * @qvec: MSI-X queue vectors information
  * @iov: SR-IOV informatin
  * @num_vecs: number of MSI-X vectors
@@ -234,6 +237,7 @@ struct nitrox_device {
 
 	struct dma_pool *ctx_pool;
 	struct nitrox_cmdq *pkt_inq;
+	struct nitrox_cmdq *aqmq[MAX_DEV_QUEUES] ____cacheline_aligned_in_smp;
 
 	struct nitrox_q_vector *qvec;
 	struct nitrox_iov iov;

drivers/crypto/cavium/nitrox/nitrox_lib.c

@@ -19,6 +19,8 @@
 
 /* packet inuput ring alignments */
 #define PKTIN_Q_ALIGN_BYTES 16
+/* AQM Queue input alignments */
+#define AQM_Q_ALIGN_BYTES 32
 
 static int nitrox_cmdq_init(struct nitrox_cmdq *cmdq, int align_bytes)
 {
@@ -57,11 +59,15 @@ static void nitrox_cmdq_reset(struct nitrox_cmdq *cmdq)
 
 static void nitrox_cmdq_cleanup(struct nitrox_cmdq *cmdq)
 {
-	struct nitrox_device *ndev = cmdq->ndev;
+	struct nitrox_device *ndev;
+
+	if (!cmdq)
+		return;
 
 	if (!cmdq->unalign_base)
 		return;
 
+	ndev = cmdq->ndev;
 	cancel_work_sync(&cmdq->backlog_qflush);
 
 	dma_free_coherent(DEV(ndev), cmdq->qsize,
@@ -78,6 +84,57 @@ static void nitrox_cmdq_cleanup(struct nitrox_cmdq *cmdq)
 	cmdq->instr_size = 0;
 }
 
+static void nitrox_free_aqm_queues(struct nitrox_device *ndev)
+{
+	int i;
+
+	for (i = 0; i < ndev->nr_queues; i++) {
+		nitrox_cmdq_cleanup(ndev->aqmq[i]);
+		kzfree(ndev->aqmq[i]);
+		ndev->aqmq[i] = NULL;
+	}
+}
+
+static int nitrox_alloc_aqm_queues(struct nitrox_device *ndev)
+{
+	int i, err;
+
+	for (i = 0; i < ndev->nr_queues; i++) {
+		struct nitrox_cmdq *cmdq;
+		u64 offset;
+
+		cmdq = kzalloc_node(sizeof(*cmdq), GFP_KERNEL, ndev->node);
+		if (!cmdq) {
+			err = -ENOMEM;
+			goto aqmq_fail;
+		}
+
+		cmdq->ndev = ndev;
+		cmdq->qno = i;
+		cmdq->instr_size = sizeof(struct aqmq_command_s);
+
+		/* AQM Queue Doorbell Counter Register Address */
+		offset = AQMQ_DRBLX(i);
+		cmdq->dbell_csr_addr = NITROX_CSR_ADDR(ndev, offset);
+		/* AQM Queue Commands Completed Count Register Address */
+		offset = AQMQ_CMD_CNTX(i);
+		cmdq->compl_cnt_csr_addr = NITROX_CSR_ADDR(ndev, offset);
+
+		err = nitrox_cmdq_init(cmdq, AQM_Q_ALIGN_BYTES);
+		if (err) {
+			kzfree(cmdq);
+			goto aqmq_fail;
+		}
+		ndev->aqmq[i] = cmdq;
+	}
+
+	return 0;
+
+aqmq_fail:
+	nitrox_free_aqm_queues(ndev);
+	return err;
+}
+
 static void nitrox_free_pktin_queues(struct nitrox_device *ndev)
 {
 	int i;
@@ -222,6 +279,12 @@ int nitrox_common_sw_init(struct nitrox_device *ndev)
 	if (err)
 		destroy_crypto_dma_pool(ndev);
 
+	err = nitrox_alloc_aqm_queues(ndev);
+	if (err) {
+		nitrox_free_pktin_queues(ndev);
+		destroy_crypto_dma_pool(ndev);
+	}
+
 	return err;
 }
 
@@ -231,6 +294,7 @@ int nitrox_common_sw_init(struct nitrox_device *ndev)
  */
 void nitrox_common_sw_cleanup(struct nitrox_device *ndev)
 {
+	nitrox_free_aqm_queues(ndev);
 	nitrox_free_pktin_queues(ndev);
 	destroy_crypto_dma_pool(ndev);
 }

drivers/crypto/cavium/nitrox/nitrox_req.h

@@ -399,6 +399,36 @@ struct nps_pkt_instr {
 	u64 fdata[2];
 };
 
+/**
+ * struct aqmq_command_s - The 32 byte command for AE processing.
+ * @opcode: Request opcode
+ * @param1: Request control parameter 1
+ * @param2: Request control parameter 2
+ * @dlen: Input length
+ * @dptr: Input pointer points to buffer in remote host
+ * @rptr: Result pointer points to buffer in remote host
+ * @grp: AQM Group (0..7)
+ * @cptr: Context pointer
+ */
+struct aqmq_command_s {
+	__be16 opcode;
+	__be16 param1;
+	__be16 param2;
+	__be16 dlen;
+	__be64 dptr;
+	__be64 rptr;
+	union {
+		__be64 word3;
+#if defined(__BIG_ENDIAN_BITFIELD)
+		u64 grp : 3;
+		u64 cptr : 61;
+#else
+		u64 cptr : 61;
+		u64 grp : 3;
+#endif
+	};
+};
+
 /**
  * struct ctx_hdr - Book keeping data about the crypto context
  * @pool: Pool used to allocate crypto context