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https://github.com/edk2-porting/linux-next.git
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[S390] cio: Clean up chsc response code handling.
This provides unified return codes for common response codes and also makes the debug feature messages more similar and informational. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Cornelia Huck
Martin Schwidefsky
parent
6f52ac2971
commit
b9c9a21a7c
@ -26,6 +26,25 @@
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static void *sei_page;
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static int chsc_error_from_response(int response)
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{
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switch (response) {
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case 0x0001:
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return 0;
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case 0x0002:
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case 0x0003:
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case 0x0006:
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case 0x0007:
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case 0x0008:
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case 0x000a:
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return -EINVAL;
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case 0x0004:
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return -EOPNOTSUPP;
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default:
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return -EIO;
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}
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}
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struct chsc_ssd_area {
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struct chsc_header request;
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u16 :10;
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@ -75,11 +94,11 @@ int chsc_get_ssd_info(struct subchannel_id schid, struct chsc_ssd_info *ssd)
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ret = (ccode == 3) ? -ENODEV : -EBUSY;
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goto out_free;
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}
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if (ssd_area->response.code != 0x0001) {
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ret = chsc_error_from_response(ssd_area->response.code);
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if (ret != 0) {
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CIO_MSG_EVENT(2, "chsc: ssd failed for 0.%x.%04x (rc=%04x)\n",
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schid.ssid, schid.sch_no,
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ssd_area->response.code);
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ret = -EIO;
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goto out_free;
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}
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if (!ssd_area->sch_valid) {
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@ -717,36 +736,15 @@ __chsc_do_secm(struct channel_subsystem *css, int enable, void *page)
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return (ccode == 3) ? -ENODEV : -EBUSY;
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switch (secm_area->response.code) {
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case 0x0001: /* Success. */
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ret = 0;
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break;
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case 0x0003: /* Invalid block. */
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case 0x0007: /* Invalid format. */
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case 0x0008: /* Other invalid block. */
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CIO_CRW_EVENT(2, "Error in chsc request block!\n");
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case 0x0102:
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case 0x0103:
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ret = -EINVAL;
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break;
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case 0x0004: /* Command not provided in model. */
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CIO_CRW_EVENT(2, "Model does not provide secm\n");
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ret = -EOPNOTSUPP;
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break;
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case 0x0102: /* cub adresses incorrect */
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CIO_CRW_EVENT(2, "Invalid addresses in chsc request block\n");
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ret = -EINVAL;
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break;
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case 0x0103: /* key error */
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CIO_CRW_EVENT(2, "Access key error in secm\n");
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ret = -EINVAL;
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break;
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case 0x0105: /* error while starting */
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CIO_CRW_EVENT(2, "Error while starting channel measurement\n");
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ret = -EIO;
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break;
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default:
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CIO_CRW_EVENT(2, "Unknown CHSC response %d\n",
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secm_area->response.code);
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ret = -EIO;
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ret = chsc_error_from_response(secm_area->response.code);
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}
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if (ret != 0)
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CIO_CRW_EVENT(2, "chsc: secm failed (rc=%04x)\n",
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secm_area->response.code);
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return ret;
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}
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@ -827,27 +825,14 @@ int chsc_determine_channel_path_description(struct chp_id chpid,
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goto out;
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}
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switch (scpd_area->response.code) {
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case 0x0001: /* Success. */
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ret = chsc_error_from_response(scpd_area->response.code);
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if (ret == 0)
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/* Success. */
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memcpy(desc, &scpd_area->desc,
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sizeof(struct channel_path_desc));
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ret = 0;
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break;
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case 0x0003: /* Invalid block. */
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case 0x0007: /* Invalid format. */
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case 0x0008: /* Other invalid block. */
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CIO_CRW_EVENT(2, "Error in chsc request block!\n");
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ret = -EINVAL;
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break;
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case 0x0004: /* Command not provided in model. */
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CIO_CRW_EVENT(2, "Model does not provide scpd\n");
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ret = -EOPNOTSUPP;
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break;
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default:
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CIO_CRW_EVENT(2, "Unknown CHSC response %d\n",
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else
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CIO_CRW_EVENT(2, "chsc: scpd failed (rc=%04x)\n",
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scpd_area->response.code);
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ret = -EIO;
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}
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out:
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free_page((unsigned long)scpd_area);
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return ret;
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@ -923,8 +908,9 @@ int chsc_get_channel_measurement_chars(struct channel_path *chp)
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goto out;
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}
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switch (scmc_area->response.code) {
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case 0x0001: /* Success. */
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ret = chsc_error_from_response(scmc_area->response.code);
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if (ret == 0) {
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/* Success. */
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if (!scmc_area->not_valid) {
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chp->cmg = scmc_area->cmg;
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chp->shared = scmc_area->shared;
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@ -935,22 +921,9 @@ int chsc_get_channel_measurement_chars(struct channel_path *chp)
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chp->cmg = -1;
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chp->shared = -1;
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}
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ret = 0;
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break;
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case 0x0003: /* Invalid block. */
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case 0x0007: /* Invalid format. */
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case 0x0008: /* Invalid bit combination. */
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CIO_CRW_EVENT(2, "Error in chsc request block!\n");
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ret = -EINVAL;
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break;
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case 0x0004: /* Command not provided. */
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CIO_CRW_EVENT(2, "Model does not provide scmc\n");
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ret = -EOPNOTSUPP;
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break;
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default:
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CIO_CRW_EVENT(2, "Unknown CHSC response %d\n",
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} else {
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CIO_CRW_EVENT(2, "chsc: scmc failed (rc=%04x)\n",
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scmc_area->response.code);
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ret = -EIO;
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}
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out:
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free_page((unsigned long)scmc_area);
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@ -1002,21 +975,17 @@ chsc_enable_facility(int operation_code)
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ret = (ret == 3) ? -ENODEV : -EBUSY;
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goto out;
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}
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switch (sda_area->response.code) {
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case 0x0001: /* everything ok */
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ret = 0;
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break;
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case 0x0003: /* invalid request block */
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case 0x0007:
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ret = -EINVAL;
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break;
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case 0x0004: /* command not provided */
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case 0x0101: /* facility not provided */
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case 0x0101:
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ret = -EOPNOTSUPP;
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break;
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default: /* something went wrong */
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ret = -EIO;
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default:
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ret = chsc_error_from_response(sda_area->response.code);
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}
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if (ret != 0)
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CIO_CRW_EVENT(2, "chsc: sda (oc=%x) failed (rc=%04x)\n",
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operation_code, sda_area->response.code);
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out:
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free_page((unsigned long)sda_area);
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return ret;
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@ -1041,33 +1010,27 @@ chsc_determine_css_characteristics(void)
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} __attribute__ ((packed)) *scsc_area;
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scsc_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
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if (!scsc_area) {
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CIO_MSG_EVENT(0, "Was not able to determine available "
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"CHSCs due to no memory.\n");
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if (!scsc_area)
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return -ENOMEM;
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}
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scsc_area->request.length = 0x0010;
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scsc_area->request.code = 0x0010;
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result = chsc(scsc_area);
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if (result) {
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CIO_MSG_EVENT(0, "Was not able to determine available CHSCs, "
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"cc=%i.\n", result);
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result = -EIO;
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result = (result == 3) ? -ENODEV : -EBUSY;
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goto exit;
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}
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if (scsc_area->response.code != 1) {
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CIO_MSG_EVENT(0, "Was not able to determine "
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"available CHSCs.\n");
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result = -EIO;
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goto exit;
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}
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memcpy(&css_general_characteristics, scsc_area->general_char,
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sizeof(css_general_characteristics));
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memcpy(&css_chsc_characteristics, scsc_area->chsc_char,
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sizeof(css_chsc_characteristics));
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result = chsc_error_from_response(scsc_area->response.code);
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if (result == 0) {
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memcpy(&css_general_characteristics, scsc_area->general_char,
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sizeof(css_general_characteristics));
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memcpy(&css_chsc_characteristics, scsc_area->chsc_char,
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sizeof(css_chsc_characteristics));
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} else
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CIO_CRW_EVENT(2, "chsc: scsc failed (rc=%04x)\n",
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scsc_area->response.code);
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exit:
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free_page ((unsigned long) scsc_area);
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return result;
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