net-next/hinic: Initialize cmdq

Create the work queues for cmdq and update the nic about the work queue
contexts. cmdq commands are used for updating the nic about the qp
contexts.

Signed-off-by: Aviad Krawczyk <aviad.krawczyk@huawei.com>
Signed-off-by: Zhao Chen <zhaochen6@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 276 insertions, 6 deletions

diff --git a/drivers/net/ethernet/huawei/hinic/hinic_hw_cmdq.c b/drivers/net/ethernet/huawei/hinic/hinic_hw_cmdq.c
index 2fd3924f4eaf..0dccbe678c31 100644
--- a/drivers/net/ethernet/huawei/hinic/hinic_hw_cmdq.c
+++ b/drivers/net/ethernet/huawei/hinic/hinic_hw_cmdq.c
@@ -13,11 +13,49 @@
  *
  */
 
+#include <linux/kernel.h>
 #include <linux/types.h>
 #include <linux/errno.h>
+#include <linux/pci.h>
+#include <linux/device.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+#include <linux/spinlock.h>
+#include <linux/sizes.h>
+#include <linux/atomic.h>
+#include <linux/log2.h>
+#include <asm/byteorder.h>
 
 #include "hinic_hw_if.h"
+#include "hinic_hw_mgmt.h"
+#include "hinic_hw_wq.h"
 #include "hinic_hw_cmdq.h"
+#include "hinic_hw_io.h"
+#include "hinic_hw_dev.h"
+
+#define CMDQ_DB_OFF                     SZ_2K
+
+#define CMDQ_WQEBB_SIZE                 64
+#define CMDQ_DEPTH                      SZ_4K
+
+#define CMDQ_WQ_PAGE_SIZE               SZ_4K
+
+#define WQE_LCMD_SIZE                   64
+#define WQE_SCMD_SIZE                   64
+
+#define CMDQ_PFN(addr, page_size)       ((addr) >> (ilog2(page_size)))
+
+#define cmdq_to_cmdqs(cmdq)     container_of((cmdq) - (cmdq)->cmdq_type, \
+					     struct hinic_cmdqs, cmdq[0])
+
+#define cmdqs_to_func_to_io(cmdqs)      container_of(cmdqs, \
+						     struct hinic_func_to_io, \
+						     cmdqs)
+
+enum cmdq_wqe_type {
+	WQE_LCMD_TYPE = 0,
+	WQE_SCMD_TYPE = 1,
+};
 
 /**
  * hinic_alloc_cmdq_buf - alloc buffer for sending command
@@ -29,8 +67,17 @@
 int hinic_alloc_cmdq_buf(struct hinic_cmdqs *cmdqs,
 			 struct hinic_cmdq_buf *cmdq_buf)
 {
-	/* should be implemented */
-	return -ENOMEM;
+	struct hinic_hwif *hwif = cmdqs->hwif;
+	struct pci_dev *pdev = hwif->pdev;
+
+	cmdq_buf->buf = pci_pool_alloc(cmdqs->cmdq_buf_pool, GFP_KERNEL,
+				       &cmdq_buf->dma_addr);
+	if (!cmdq_buf->buf) {
+		dev_err(&pdev->dev, "Failed to allocate cmd from the pool\n");
+		return -ENOMEM;
+	}
+
+	return 0;
 }
 
 /**
@@ -41,7 +88,7 @@ int hinic_alloc_cmdq_buf(struct hinic_cmdqs *cmdqs,
 void hinic_free_cmdq_buf(struct hinic_cmdqs *cmdqs,
 			 struct hinic_cmdq_buf *cmdq_buf)
 {
-	/* should be implemented */
+	pci_pool_free(cmdqs->cmdq_buf_pool, cmdq_buf->buf, cmdq_buf->dma_addr);
 }
 
 /**
@@ -63,6 +110,169 @@ int hinic_cmdq_direct_resp(struct hinic_cmdqs *cmdqs,
 }
 
 /**
+ * cmdq_init_queue_ctxt - init the queue ctxt of a cmdq
+ * @cmdq_ctxt: cmdq ctxt to initialize
+ * @cmdq: the cmdq
+ * @cmdq_pages: the memory of the queue
+ **/
+static void cmdq_init_queue_ctxt(struct hinic_cmdq_ctxt *cmdq_ctxt,
+				 struct hinic_cmdq *cmdq,
+				 struct hinic_cmdq_pages *cmdq_pages)
+{
+	struct hinic_cmdq_ctxt_info *ctxt_info = &cmdq_ctxt->ctxt_info;
+	u64 wq_first_page_paddr, cmdq_first_block_paddr, pfn;
+	struct hinic_cmdqs *cmdqs = cmdq_to_cmdqs(cmdq);
+	struct hinic_wq *wq = cmdq->wq;
+
+	/* The data in the HW is in Big Endian Format */
+	wq_first_page_paddr = be64_to_cpu(*wq->block_vaddr);
+
+	pfn = CMDQ_PFN(wq_first_page_paddr, wq->wq_page_size);
+
+	ctxt_info->curr_wqe_page_pfn =
+		HINIC_CMDQ_CTXT_PAGE_INFO_SET(pfn, CURR_WQE_PAGE_PFN)   |
+		HINIC_CMDQ_CTXT_PAGE_INFO_SET(HINIC_CEQ_ID_CMDQ, EQ_ID) |
+		HINIC_CMDQ_CTXT_PAGE_INFO_SET(1, CEQ_ARM)               |
+		HINIC_CMDQ_CTXT_PAGE_INFO_SET(1, CEQ_EN)                |
+		HINIC_CMDQ_CTXT_PAGE_INFO_SET(cmdq->wrapped, WRAPPED);
+
+	/* block PFN - Read Modify Write */
+	cmdq_first_block_paddr = cmdq_pages->page_paddr;
+
+	pfn = CMDQ_PFN(cmdq_first_block_paddr, wq->wq_page_size);
+
+	ctxt_info->wq_block_pfn =
+		HINIC_CMDQ_CTXT_BLOCK_INFO_SET(pfn, WQ_BLOCK_PFN) |
+		HINIC_CMDQ_CTXT_BLOCK_INFO_SET(atomic_read(&wq->cons_idx), CI);
+
+	cmdq_ctxt->func_idx = HINIC_HWIF_FUNC_IDX(cmdqs->hwif);
+	cmdq_ctxt->cmdq_type  = cmdq->cmdq_type;
+}
+
+/**
+ * init_cmdq - initialize cmdq
+ * @cmdq: the cmdq
+ * @wq: the wq attaced to the cmdq
+ * @q_type: the cmdq type of the cmdq
+ * @db_area: doorbell area for the cmdq
+ *
+ * Return 0 - Success, negative - Failure
+ **/
+static int init_cmdq(struct hinic_cmdq *cmdq, struct hinic_wq *wq,
+		     enum hinic_cmdq_type q_type, void __iomem *db_area)
+{
+	int err;
+
+	cmdq->wq = wq;
+	cmdq->cmdq_type = q_type;
+	cmdq->wrapped = 1;
+
+	spin_lock_init(&cmdq->cmdq_lock);
+
+	cmdq->done = vzalloc(wq->q_depth * sizeof(*cmdq->done));
+	if (!cmdq->done)
+		return -ENOMEM;
+
+	cmdq->errcode = vzalloc(wq->q_depth * sizeof(*cmdq->errcode));
+	if (!cmdq->errcode) {
+		err = -ENOMEM;
+		goto err_errcode;
+	}
+
+	cmdq->db_base = db_area + CMDQ_DB_OFF;
+	return 0;
+
+err_errcode:
+	vfree(cmdq->done);
+	return err;
+}
+
+/**
+ * free_cmdq - Free cmdq
+ * @cmdq: the cmdq to free
+ **/
+static void free_cmdq(struct hinic_cmdq *cmdq)
+{
+	vfree(cmdq->errcode);
+	vfree(cmdq->done);
+}
+
+/**
+ * init_cmdqs_ctxt - write the cmdq ctxt to HW after init all cmdq
+ * @hwdev: the NIC HW device
+ * @cmdqs: cmdqs to write the ctxts for
+ * &db_area: db_area for all the cmdqs
+ *
+ * Return 0 - Success, negative - Failure
+ **/
+static int init_cmdqs_ctxt(struct hinic_hwdev *hwdev,
+			   struct hinic_cmdqs *cmdqs, void __iomem **db_area)
+{
+	struct hinic_hwif *hwif = hwdev->hwif;
+	enum hinic_cmdq_type type, cmdq_type;
+	struct hinic_cmdq_ctxt *cmdq_ctxts;
+	struct pci_dev *pdev = hwif->pdev;
+	struct hinic_pfhwdev *pfhwdev;
+	size_t cmdq_ctxts_size;
+	int err;
+
+	if (!HINIC_IS_PF(hwif) && !HINIC_IS_PPF(hwif)) {
+		dev_err(&pdev->dev, "Unsupported PCI function type\n");
+		return -EINVAL;
+	}
+
+	cmdq_ctxts_size = HINIC_MAX_CMDQ_TYPES * sizeof(*cmdq_ctxts);
+	cmdq_ctxts = devm_kzalloc(&pdev->dev, cmdq_ctxts_size, GFP_KERNEL);
+	if (!cmdq_ctxts)
+		return -ENOMEM;
+
+	pfhwdev = container_of(hwdev, struct hinic_pfhwdev, hwdev);
+
+	cmdq_type = HINIC_CMDQ_SYNC;
+	for (; cmdq_type < HINIC_MAX_CMDQ_TYPES; cmdq_type++) {
+		err = init_cmdq(&cmdqs->cmdq[cmdq_type],
+				&cmdqs->saved_wqs[cmdq_type], cmdq_type,
+				db_area[cmdq_type]);
+		if (err) {
+			dev_err(&pdev->dev, "Failed to initialize cmdq\n");
+			goto err_init_cmdq;
+		}
+
+		cmdq_init_queue_ctxt(&cmdq_ctxts[cmdq_type],
+				     &cmdqs->cmdq[cmdq_type],
+				     &cmdqs->cmdq_pages);
+	}
+
+	/* Write the CMDQ ctxts */
+	cmdq_type = HINIC_CMDQ_SYNC;
+	for (; cmdq_type < HINIC_MAX_CMDQ_TYPES; cmdq_type++) {
+		err = hinic_msg_to_mgmt(&pfhwdev->pf_to_mgmt, HINIC_MOD_COMM,
+					HINIC_COMM_CMD_CMDQ_CTXT_SET,
+					&cmdq_ctxts[cmdq_type],
+					sizeof(cmdq_ctxts[cmdq_type]),
+					NULL, NULL, HINIC_MGMT_MSG_SYNC);
+		if (err) {
+			dev_err(&pdev->dev, "Failed to set CMDQ CTXT type = %d\n",
+				cmdq_type);
+			goto err_write_cmdq_ctxt;
+		}
+	}
+
+	devm_kfree(&pdev->dev, cmdq_ctxts);
+	return 0;
+
+err_write_cmdq_ctxt:
+	cmdq_type = HINIC_MAX_CMDQ_TYPES;
+
+err_init_cmdq:
+	for (type = HINIC_CMDQ_SYNC; type < cmdq_type; type++)
+		free_cmdq(&cmdqs->cmdq[type]);
+
+	devm_kfree(&pdev->dev, cmdq_ctxts);
+	return err;
+}
+
+/**
  * hinic_init_cmdqs - init all cmdqs
  * @cmdqs: cmdqs to init
  * @hwif: HW interface for accessing cmdqs
@@ -73,8 +283,55 @@ int hinic_cmdq_direct_resp(struct hinic_cmdqs *cmdqs,
 int hinic_init_cmdqs(struct hinic_cmdqs *cmdqs, struct hinic_hwif *hwif,
 		     void __iomem **db_area)
 {
-	/* should be implemented */
-	return -EINVAL;
+	struct hinic_func_to_io *func_to_io = cmdqs_to_func_to_io(cmdqs);
+	struct pci_dev *pdev = hwif->pdev;
+	struct hinic_hwdev *hwdev;
+	size_t saved_wqs_size;
+	u16 max_wqe_size;
+	int err;
+
+	cmdqs->hwif = hwif;
+	cmdqs->cmdq_buf_pool = pci_pool_create("hinic_cmdq", pdev,
+					       HINIC_CMDQ_BUF_SIZE,
+					       HINIC_CMDQ_BUF_SIZE, 0);
+	if (!cmdqs->cmdq_buf_pool)
+		return -ENOMEM;
+
+	saved_wqs_size = HINIC_MAX_CMDQ_TYPES * sizeof(struct hinic_wq);
+	cmdqs->saved_wqs = devm_kzalloc(&pdev->dev, saved_wqs_size, GFP_KERNEL);
+	if (!cmdqs->saved_wqs) {
+		err = -ENOMEM;
+		goto err_saved_wqs;
+	}
+
+	max_wqe_size = WQE_LCMD_SIZE;
+	err = hinic_wqs_cmdq_alloc(&cmdqs->cmdq_pages, cmdqs->saved_wqs, hwif,
+				   HINIC_MAX_CMDQ_TYPES, CMDQ_WQEBB_SIZE,
+				   CMDQ_WQ_PAGE_SIZE, CMDQ_DEPTH, max_wqe_size);
+	if (err) {
+		dev_err(&pdev->dev, "Failed to allocate CMDQ wqs\n");
+		goto err_cmdq_wqs;
+	}
+
+	hwdev = container_of(func_to_io, struct hinic_hwdev, func_to_io);
+	err = init_cmdqs_ctxt(hwdev, cmdqs, db_area);
+	if (err) {
+		dev_err(&pdev->dev, "Failed to write cmdq ctxt\n");
+		goto err_cmdq_ctxt;
+	}
+
+	return 0;
+
+err_cmdq_ctxt:
+	hinic_wqs_cmdq_free(&cmdqs->cmdq_pages, cmdqs->saved_wqs,
+			    HINIC_MAX_CMDQ_TYPES);
+
+err_cmdq_wqs:
+	devm_kfree(&pdev->dev, cmdqs->saved_wqs);
+
+err_saved_wqs:
+	pci_pool_destroy(cmdqs->cmdq_buf_pool);
+	return err;
 }
 
 /**
@@ -83,5 +340,18 @@ int hinic_init_cmdqs(struct hinic_cmdqs *cmdqs, struct hinic_hwif *hwif,
  **/
 void hinic_free_cmdqs(struct hinic_cmdqs *cmdqs)
 {
-	/* should be implemented */
+	struct hinic_hwif *hwif = cmdqs->hwif;
+	struct pci_dev *pdev = hwif->pdev;
+	enum hinic_cmdq_type cmdq_type;
+
+	cmdq_type = HINIC_CMDQ_SYNC;
+	for (; cmdq_type < HINIC_MAX_CMDQ_TYPES; cmdq_type++)
+		free_cmdq(&cmdqs->cmdq[cmdq_type]);
+
+	hinic_wqs_cmdq_free(&cmdqs->cmdq_pages, cmdqs->saved_wqs,
+			    HINIC_MAX_CMDQ_TYPES);
+
+	devm_kfree(&pdev->dev, cmdqs->saved_wqs);
+
+	pci_pool_destroy(cmdqs->cmdq_buf_pool);
 }