Commit 20675b37 authored by Mintz, Yuval's avatar Mintz, Yuval Committed by David S. Miller

qed: Support NVM-image reading API

Storage drivers require images from the nvram in boot-from-SAN
scenarios. This provides the necessary API between qed and the
protocol drivers to perform such reads.
Signed-off-by: default avatarYuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 3c5da942
......@@ -1535,6 +1535,21 @@ static int qed_drain(struct qed_dev *cdev)
return 0;
}
static int qed_nvm_get_image(struct qed_dev *cdev, enum qed_nvm_images type,
u8 *buf, u16 len)
{
struct qed_hwfn *hwfn = QED_LEADING_HWFN(cdev);
struct qed_ptt *ptt = qed_ptt_acquire(hwfn);
int rc;
if (!ptt)
return -EAGAIN;
rc = qed_mcp_get_nvm_image(hwfn, ptt, type, buf, len);
qed_ptt_release(hwfn, ptt);
return rc;
}
static void qed_get_coalesce(struct qed_dev *cdev, u16 *rx_coal, u16 *tx_coal)
{
*rx_coal = cdev->rx_coalesce_usecs;
......@@ -1712,6 +1727,7 @@ const struct qed_common_ops qed_common_ops_pass = {
.dbg_all_data_size = &qed_dbg_all_data_size,
.chain_alloc = &qed_chain_alloc,
.chain_free = &qed_chain_free,
.nvm_get_image = &qed_nvm_get_image,
.get_coalesce = &qed_get_coalesce,
.set_coalesce = &qed_set_coalesce,
.set_led = &qed_set_led,
......
......@@ -2310,6 +2310,95 @@ int qed_mcp_bist_nvm_test_get_image_att(struct qed_hwfn *p_hwfn,
return rc;
}
static int
qed_mcp_get_nvm_image_att(struct qed_hwfn *p_hwfn,
struct qed_ptt *p_ptt,
enum qed_nvm_images image_id,
struct qed_nvm_image_att *p_image_att)
{
struct bist_nvm_image_att mfw_image_att;
enum nvm_image_type type;
u32 num_images, i;
int rc;
/* Translate image_id into MFW definitions */
switch (image_id) {
case QED_NVM_IMAGE_ISCSI_CFG:
type = NVM_TYPE_ISCSI_CFG;
break;
case QED_NVM_IMAGE_FCOE_CFG:
type = NVM_TYPE_FCOE_CFG;
break;
default:
DP_NOTICE(p_hwfn, "Unknown request of image_id %08x\n",
image_id);
return -EINVAL;
}
/* Learn number of images, then traverse and see if one fits */
rc = qed_mcp_bist_nvm_test_get_num_images(p_hwfn, p_ptt, &num_images);
if (rc || !num_images)
return -EINVAL;
for (i = 0; i < num_images; i++) {
rc = qed_mcp_bist_nvm_test_get_image_att(p_hwfn, p_ptt,
&mfw_image_att, i);
if (rc)
return rc;
if (type == mfw_image_att.image_type)
break;
}
if (i == num_images) {
DP_VERBOSE(p_hwfn, QED_MSG_STORAGE,
"Failed to find nvram image of type %08x\n",
image_id);
return -EINVAL;
}
p_image_att->start_addr = mfw_image_att.nvm_start_addr;
p_image_att->length = mfw_image_att.len;
return 0;
}
int qed_mcp_get_nvm_image(struct qed_hwfn *p_hwfn,
struct qed_ptt *p_ptt,
enum qed_nvm_images image_id,
u8 *p_buffer, u32 buffer_len)
{
struct qed_nvm_image_att image_att;
int rc;
memset(p_buffer, 0, buffer_len);
rc = qed_mcp_get_nvm_image_att(p_hwfn, p_ptt, image_id, &image_att);
if (rc)
return rc;
/* Validate sizes - both the image's and the supplied buffer's */
if (image_att.length <= 4) {
DP_VERBOSE(p_hwfn, QED_MSG_STORAGE,
"Image [%d] is too small - only %d bytes\n",
image_id, image_att.length);
return -EINVAL;
}
/* Each NVM image is suffixed by CRC; Upper-layer has no need for it */
image_att.length -= 4;
if (image_att.length > buffer_len) {
DP_VERBOSE(p_hwfn,
QED_MSG_STORAGE,
"Image [%d] is too big - %08x bytes where only %08x are available\n",
image_id, image_att.length, buffer_len);
return -ENOMEM;
}
return qed_mcp_nvm_read(p_hwfn->cdev, image_att.start_addr,
p_buffer, image_att.length);
}
static enum resource_id_enum qed_mcp_get_mfw_res_id(enum qed_resources res_id)
{
enum resource_id_enum mfw_res_id = RESOURCE_NUM_INVALID;
......
......@@ -430,6 +430,27 @@ int qed_mcp_set_led(struct qed_hwfn *p_hwfn,
*/
int qed_mcp_nvm_read(struct qed_dev *cdev, u32 addr, u8 *p_buf, u32 len);
struct qed_nvm_image_att {
u32 start_addr;
u32 length;
};
/**
* @brief Allows reading a whole nvram image
*
* @param p_hwfn
* @param p_ptt
* @param image_id - image requested for reading
* @param p_buffer - allocated buffer into which to fill data
* @param buffer_len - length of the allocated buffer.
*
* @return 0 iff p_buffer now contains the nvram image.
*/
int qed_mcp_get_nvm_image(struct qed_hwfn *p_hwfn,
struct qed_ptt *p_ptt,
enum qed_nvm_images image_id,
u8 *p_buffer, u32 buffer_len);
/**
* @brief Bist register test
*
......
......@@ -156,6 +156,11 @@ struct qed_dcbx_get {
struct qed_dcbx_admin_params local;
};
enum qed_nvm_images {
QED_NVM_IMAGE_ISCSI_CFG,
QED_NVM_IMAGE_FCOE_CFG,
};
enum qed_led_mode {
QED_LED_MODE_OFF,
QED_LED_MODE_ON,
......@@ -630,6 +635,19 @@ struct qed_common_ops {
void (*chain_free)(struct qed_dev *cdev,
struct qed_chain *p_chain);
/**
* @brief nvm_get_image - reads an entire image from nvram
*
* @param cdev
* @param type - type of the request nvram image
* @param buf - preallocated buffer to fill with the image
* @param len - length of the allocated buffer
*
* @return 0 on success, error otherwise
*/
int (*nvm_get_image)(struct qed_dev *cdev,
enum qed_nvm_images type, u8 *buf, u16 len);
/**
* @brief get_coalesce - Get coalesce parameters in usec
*
......
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