[PATCH v2 20/38] cxlflash: Support reading adapter VPD data

Uma Krishnan
2018-02-26T22:22:50Z

Use the PCI VPD services to support reading the VPD data of the
underlying adapter.

Signed-off-by: Uma Krishnan <ukrishn@linux.vnet.ibm.com>
Acked-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com>
---
drivers/scsi/cxlflash/ocxl_hw.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)

diff --git a/drivers/scsi/cxlflash/ocxl_hw.c b/drivers/scsi/cxlflash/ocxl_hw.c
index 364e7a5..a1d58fc 100644
--- a/drivers/scsi/cxlflash/ocxl_hw.c
+++ b/drivers/scsi/cxlflash/ocxl_hw.c
@@ -324,6 +324,20 @@ static void ocxlflash_perst_reloads_same_image(void *afu_cookie, bool image)
}

/**
+ * ocxlflash_read_adapter_vpd() - reads the adapter VPD
+ * @pdev: PCI device associated with the host.
+ * @buf: Buffer to get the VPD data.
+ * @count: Size of buffer (maximum bytes that can be read).
+ *
+ * Return: size of VPD on success, -errno on failure
+ */
+static ssize_t ocxlflash_read_adapter_vpd(struct pci_dev *pdev, void *buf,
+ size_t count)
+{
+ return pci_read_vpd(pdev, 0, count, buf);
+}
+
+/**
* ocxlflash_unconfig_afu() - unconfigure the AFU
* @afu: AFU associated with the host.
*/
@@ -650,6 +664,7 @@ const struct cxlflash_backend_ops cxlflash_ocxl_ops = {
.dev_context_init = ocxlflash_dev_context_init,
.release_context = ocxlflash_release_context,
.perst_reloads_same_image = ocxlflash_perst_reloads_same_image,
+ .read_adapter_vpd = ocxlflash_read_adapter_vpd,
.create_afu = ocxlflash_create_afu,
.destroy_afu = ocxlflash_destroy_afu,
.get_fd = ocxlflash_get_fd,
--
2.1.0