qed: Add nvram selftest

Signed-off-by: Yuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/qlogic/qed/qed_hsi.h

@@ -8666,6 +8666,8 @@ struct public_drv_mb {
 
 #define DRV_MB_PARAM_BIST_REGISTER_TEST		1
 #define DRV_MB_PARAM_BIST_CLOCK_TEST		2
+#define DRV_MB_PARAM_BIST_NVM_TEST_NUM_IMAGES	3
+#define DRV_MB_PARAM_BIST_NVM_TEST_IMAGE_BY_INDEX	4
 
 #define DRV_MB_PARAM_BIST_RC_UNKNOWN		0
 #define DRV_MB_PARAM_BIST_RC_PASSED		1
@@ -8674,6 +8676,8 @@ struct public_drv_mb {
 
 #define DRV_MB_PARAM_BIST_TEST_INDEX_SHIFT	0
 #define DRV_MB_PARAM_BIST_TEST_INDEX_MASK	0x000000FF
+#define DRV_MB_PARAM_BIST_TEST_IMAGE_INDEX_SHIFT	8
+#define DRV_MB_PARAM_BIST_TEST_IMAGE_INDEX_MASK		0x0000FF00
 
 	u32 fw_mb_header;
 #define FW_MSG_CODE_MASK			0xffff0000

drivers/net/ethernet/qlogic/qed/qed_main.c

@@ -1508,6 +1508,7 @@ static struct qed_selftest_ops qed_selftest_ops_pass = {
 	.selftest_interrupt = &qed_selftest_interrupt,
 	.selftest_register = &qed_selftest_register,
 	.selftest_clock = &qed_selftest_clock,
+	.selftest_nvram = &qed_selftest_nvram,
 };
 
 const struct qed_common_ops qed_common_ops_pass = {

drivers/net/ethernet/qlogic/qed/qed_mcp.c

@@ -1434,6 +1434,52 @@ int qed_mcp_mask_parities(struct qed_hwfn *p_hwfn,
 	return rc;
 }
 
+int qed_mcp_nvm_read(struct qed_dev *cdev, u32 addr, u8 *p_buf, u32 len)
+{
+	u32 bytes_left = len, offset = 0, bytes_to_copy, read_len = 0;
+	struct qed_hwfn *p_hwfn = QED_LEADING_HWFN(cdev);
+	u32 resp = 0, resp_param = 0;
+	struct qed_ptt *p_ptt;
+	int rc = 0;
+
+	p_ptt = qed_ptt_acquire(p_hwfn);
+	if (!p_ptt)
+		return -EBUSY;
+
+	while (bytes_left > 0) {
+		bytes_to_copy = min_t(u32, bytes_left, MCP_DRV_NVM_BUF_LEN);
+
+		rc = qed_mcp_nvm_rd_cmd(p_hwfn, p_ptt,
+					DRV_MSG_CODE_NVM_READ_NVRAM,
+					addr + offset +
+					(bytes_to_copy <<
+					 DRV_MB_PARAM_NVM_LEN_SHIFT),
+					&resp, &resp_param,
+					&read_len,
+					(u32 *)(p_buf + offset));
+
+		if (rc || (resp != FW_MSG_CODE_NVM_OK)) {
+			DP_NOTICE(cdev, "MCP command rc = %d\n", rc);
+			break;
+		}
+
+		/* This can be a lengthy process, and it's possible scheduler
+		 * isn't preemptable. Sleep a bit to prevent CPU hogging.
+		 */
+		if (bytes_left % 0x1000 <
+		    (bytes_left - read_len) % 0x1000)
+			usleep_range(1000, 2000);
+
+		offset += read_len;
+		bytes_left -= read_len;
+	}
+
+	cdev->mcp_nvm_resp = resp;
+	qed_ptt_release(p_hwfn, p_ptt);
+
+	return rc;
+}
+
 int qed_mcp_bist_register_test(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
 {
 	u32 drv_mb_param = 0, rsp, param;
@@ -1475,3 +1521,51 @@ int qed_mcp_bist_clock_test(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
 
 	return rc;
 }
+
+int qed_mcp_bist_nvm_test_get_num_images(struct qed_hwfn *p_hwfn,
+					 struct qed_ptt *p_ptt,
+					 u32 *num_images)
+{
+	u32 drv_mb_param = 0, rsp;
+	int rc = 0;
+
+	drv_mb_param = (DRV_MB_PARAM_BIST_NVM_TEST_NUM_IMAGES <<
+			DRV_MB_PARAM_BIST_TEST_INDEX_SHIFT);
+
+	rc = qed_mcp_cmd(p_hwfn, p_ptt, DRV_MSG_CODE_BIST_TEST,
+			 drv_mb_param, &rsp, num_images);
+	if (rc)
+		return rc;
+
+	if (((rsp & FW_MSG_CODE_MASK) != FW_MSG_CODE_OK))
+		rc = -EINVAL;
+
+	return rc;
+}
+
+int qed_mcp_bist_nvm_test_get_image_att(struct qed_hwfn *p_hwfn,
+					struct qed_ptt *p_ptt,
+					struct bist_nvm_image_att *p_image_att,
+					u32 image_index)
+{
+	u32 buf_size = 0, param, resp = 0, resp_param = 0;
+	int rc;
+
+	param = DRV_MB_PARAM_BIST_NVM_TEST_IMAGE_BY_INDEX <<
+		DRV_MB_PARAM_BIST_TEST_INDEX_SHIFT;
+	param |= image_index << DRV_MB_PARAM_BIST_TEST_IMAGE_INDEX_SHIFT;
+
+	rc = qed_mcp_nvm_rd_cmd(p_hwfn, p_ptt,
+				DRV_MSG_CODE_BIST_TEST, param,
+				&resp, &resp_param,
+				&buf_size,
+				(u32 *)p_image_att);
+	if (rc)
+		return rc;
+
+	if (((resp & FW_MSG_CODE_MASK) != FW_MSG_CODE_OK) ||
+	    (p_image_att->return_code != 1))
+		rc = -EINVAL;
+
+	return rc;
+}

drivers/net/ethernet/qlogic/qed/qed_mcp.h

@@ -379,6 +379,18 @@ int qed_mcp_set_led(struct qed_hwfn *p_hwfn,
 		    struct qed_ptt *p_ptt,
 		    enum qed_led_mode mode);
 
+/**
+ * @brief Read from nvm
+ *
+ *  @param cdev
+ *  @param addr - nvm offset
+ *  @param p_buf - nvm read buffer
+ *  @param len - buffer len
+ *
+ * @return int - 0 - operation was successful.
+ */
+int qed_mcp_nvm_read(struct qed_dev *cdev, u32 addr, u8 *p_buf, u32 len);
+
 /**
  * @brief Bist register test
  *
@@ -401,6 +413,35 @@ int qed_mcp_bist_register_test(struct qed_hwfn *p_hwfn,
 int qed_mcp_bist_clock_test(struct qed_hwfn *p_hwfn,
 			    struct qed_ptt *p_ptt);
 
+/**
+ * @brief Bist nvm test - get number of images
+ *
+ *  @param p_hwfn       - hw function
+ *  @param p_ptt        - PTT required for register access
+ *  @param num_images   - number of images if operation was
+ *			  successful. 0 if not.
+ *
+ * @return int - 0 - operation was successful.
+ */
+int qed_mcp_bist_nvm_test_get_num_images(struct qed_hwfn *p_hwfn,
+					 struct qed_ptt *p_ptt,
+					 u32 *num_images);
+
+/**
+ * @brief Bist nvm test - get image attributes by index
+ *
+ *  @param p_hwfn      - hw function
+ *  @param p_ptt       - PTT required for register access
+ *  @param p_image_att - Attributes of image
+ *  @param image_index - Index of image to get information for
+ *
+ * @return int - 0 - operation was successful.
+ */
+int qed_mcp_bist_nvm_test_get_image_att(struct qed_hwfn *p_hwfn,
+					struct qed_ptt *p_ptt,
+					struct bist_nvm_image_att *p_image_att,
+					u32 image_index);
+
 /* Using hwfn number (and not pf_num) is required since in CMT mode,
  * same pf_num may be used by two different hwfn
  * TODO - this shouldn't really be in .h file, but until all fields

drivers/net/ethernet/qlogic/qed/qed_selftest.c

@@ -1,3 +1,4 @@
+#include <linux/crc32.h>
 #include "qed.h"
 #include "qed_dev_api.h"
 #include "qed_mcp.h"
@@ -75,3 +76,103 @@ int qed_selftest_clock(struct qed_dev *cdev)
 
 	return rc;
 }
+
+int qed_selftest_nvram(struct qed_dev *cdev)
+{
+	struct qed_hwfn *p_hwfn = QED_LEADING_HWFN(cdev);
+	struct qed_ptt *p_ptt = qed_ptt_acquire(p_hwfn);
+	u32 num_images, i, j, nvm_crc, calc_crc;
+	struct bist_nvm_image_att image_att;
+	u8 *buf = NULL;
+	__be32 val;
+	int rc;
+
+	if (!p_ptt) {
+		DP_ERR(p_hwfn, "failed to acquire ptt\n");
+		return -EBUSY;
+	}
+
+	/* Acquire from MFW the amount of available images */
+	rc = qed_mcp_bist_nvm_test_get_num_images(p_hwfn, p_ptt, &num_images);
+	if (rc || !num_images) {
+		DP_ERR(p_hwfn, "Failed getting number of images\n");
+		return -EINVAL;
+	}
+
+	/* Iterate over images and validate CRC */
+	for (i = 0; i < num_images; i++) {
+		/* This mailbox returns information about the image required for
+		 * reading it.
+		 */
+		rc = qed_mcp_bist_nvm_test_get_image_att(p_hwfn, p_ptt,
+							 &image_att, i);
+		if (rc) {
+			DP_ERR(p_hwfn,
+			       "Failed getting image index %d attributes\n",
+			       i);
+			goto err0;
+		}
+
+		/* After MFW crash dump is collected - the image's CRC stops
+		 * being valid.
+		 */
+		if (image_att.image_type == NVM_TYPE_MDUMP)
+			continue;
+
+		DP_VERBOSE(p_hwfn, QED_MSG_SP, "image index %d, size %x\n",
+			   i, image_att.len);
+
+		/* Allocate a buffer for holding the nvram image */
+		buf = kzalloc(image_att.len, GFP_KERNEL);
+		if (!buf) {
+			rc = -ENOMEM;
+			goto err0;
+		}
+
+		/* Read image into buffer */
+		rc = qed_mcp_nvm_read(p_hwfn->cdev, image_att.nvm_start_addr,
+				      buf, image_att.len);
+		if (rc) {
+			DP_ERR(p_hwfn,
+			       "Failed reading image index %d from nvm.\n", i);
+			goto err1;
+		}
+
+		/* Convert the buffer into big-endian format (excluding the
+		 * closing 4 bytes of CRC).
+		 */
+		for (j = 0; j < image_att.len - 4; j += 4) {
+			val = cpu_to_be32(*(u32 *)&buf[j]);
+			*(u32 *)&buf[j] = (__force u32)val;
+		}
+
+		/* Calc CRC for the "actual" image buffer, i.e. not including
+		 * the last 4 CRC bytes.
+		 */
+		nvm_crc = *(u32 *)(buf + image_att.len - 4);
+		calc_crc = crc32(0xffffffff, buf, image_att.len - 4);
+		calc_crc = (__force u32)~cpu_to_be32(calc_crc);
+		DP_VERBOSE(p_hwfn, QED_MSG_SP,
+			   "nvm crc 0x%x, calc_crc 0x%x\n", nvm_crc, calc_crc);
+
+		if (calc_crc != nvm_crc) {
+			rc = -EINVAL;
+			goto err1;
+		}
+
+		/* Done with this image; Free to prevent double release
+		 * on subsequent failure.
+		 */
+		kfree(buf);
+		buf = NULL;
+	}
+
+	qed_ptt_release(p_hwfn, p_ptt);
+	return 0;
+
+err1:
+	kfree(buf);
+err0:
+	qed_ptt_release(p_hwfn, p_ptt);
+	return rc;
+}

drivers/net/ethernet/qlogic/qed/qed_selftest.h

@@ -37,4 +37,14 @@ int qed_selftest_register(struct qed_dev *cdev);
  * @return int
  */
 int qed_selftest_clock(struct qed_dev *cdev);
+
+/**
+ * @brief qed_selftest_nvram - Perform nvram test
+ *
+ * @param cdev
+ *
+ * @return int
+ */
+int qed_selftest_nvram(struct qed_dev *cdev);
+
 #endif

drivers/net/ethernet/qlogic/qede/qede_ethtool.c

@@ -157,6 +157,7 @@ enum qede_ethtool_tests {
 	QEDE_ETHTOOL_MEMORY_TEST,
 	QEDE_ETHTOOL_REGISTER_TEST,
 	QEDE_ETHTOOL_CLOCK_TEST,
+	QEDE_ETHTOOL_NVRAM_TEST,
 	QEDE_ETHTOOL_TEST_MAX
 };
 
@@ -166,6 +167,7 @@ static const char qede_tests_str_arr[QEDE_ETHTOOL_TEST_MAX][ETH_GSTRING_LEN] = {
 	"Memory (online)\t\t",
 	"Register (online)\t",
 	"Clock (online)\t\t",
+	"Nvram (online)\t\t",
 };
 
 static void qede_get_strings_stats(struct qede_dev *edev, u8 *buf)
@@ -1392,6 +1394,11 @@ static void qede_self_test(struct net_device *dev,
 		buf[QEDE_ETHTOOL_CLOCK_TEST] = 1;
 		etest->flags |= ETH_TEST_FL_FAILED;
 	}
+
+	if (edev->ops->common->selftest->selftest_nvram(edev->cdev)) {
+		buf[QEDE_ETHTOOL_NVRAM_TEST] = 1;
+		etest->flags |= ETH_TEST_FL_FAILED;
+	}
 }
 
 static int qede_set_tunable(struct net_device *dev,

include/linux/qed/qed_if.h

@@ -402,6 +402,15 @@ struct qed_selftest_ops {
  * @return 0 on success, error otherwise.
  */
 	int (*selftest_clock)(struct qed_dev *cdev);
+
+/**
+ * @brief selftest_nvram - Perform nvram test
+ *
+ * @param cdev
+ *
+ * @return 0 on success, error otherwise.
+ */
+	int (*selftest_nvram) (struct qed_dev *cdev);
 };
 
 struct qed_common_ops {