Re: [PATCH 2/8] lightnvm: show generic geometry in sysfs

From: Matias BjÃrling
Date: Thu Feb 15 2018 - 05:20:24 EST

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In reply to: Javier GonzÃlez: "[PATCH 2/8] lightnvm: show generic geometry in sysfs"
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On 02/13/2018 03:06 PM, Javier GonzÃlez wrote:

From: Javier GonzÃlez <javier@xxxxxxxxxxx>

Apart from showing the geometry returned by the different identify
commands, provide the generic geometry too, as this is the geometry that
targets will use to describe the device.

Signed-off-by: Javier GonzÃlez <javier@xxxxxxxxxxxx>
---
drivers/nvme/host/lightnvm.c | 146 ++++++++++++++++++++++++++++---------------
1 file changed, 97 insertions(+), 49 deletions(-)

diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c
index 97739e668602..7bc75182c723 100644
--- a/drivers/nvme/host/lightnvm.c
+++ b/drivers/nvme/host/lightnvm.c
@@ -944,8 +944,27 @@ static ssize_t nvm_dev_attr_show(struct device *dev,
return scnprintf(page, PAGE_SIZE, "%u.%u\n",
dev_geo->major_ver_id,
dev_geo->minor_ver_id);
- } else if (strcmp(attr->name, "capabilities") == 0) {
- return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.cap);
+ } else if (strcmp(attr->name, "clba") == 0) {
+ return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.clba);
+ } else if (strcmp(attr->name, "csecs") == 0) {
+ return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.csecs);
+ } else if (strcmp(attr->name, "sos") == 0) {
+ return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.sos);
+ } else if (strcmp(attr->name, "ws_min") == 0) {
+ return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.ws_min);
+ } else if (strcmp(attr->name, "ws_opt") == 0) {
+ return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.ws_opt);
+ } else if (strcmp(attr->name, "maxoc") == 0) {
+ return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.maxoc);
+ } else if (strcmp(attr->name, "maxocpu") == 0) {
+ return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.maxocpu);
+ } else if (strcmp(attr->name, "mw_cunits") == 0) {
+ return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.mw_cunits);
+ } else if (strcmp(attr->name, "media_capabilities") == 0) {
+ return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.mccap);
+ } else if (strcmp(attr->name, "max_phys_secs") == 0) {
+ return scnprintf(page, PAGE_SIZE, "%u\n",
+ ndev->ops->max_phys_sect);
} else if (strcmp(attr->name, "read_typ") == 0) {
return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.trdt);
} else if (strcmp(attr->name, "read_max") == 0) {
@@ -984,19 +1003,8 @@ static ssize_t nvm_dev_attr_show_12(struct device *dev,
attr = &dattr->attr;
- if (strcmp(attr->name, "vendor_opcode") == 0) {
- return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.vmnt);
- } else if (strcmp(attr->name, "device_mode") == 0) {
- return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.dom);
- /* kept for compatibility */
- } else if (strcmp(attr->name, "media_manager") == 0) {
- return scnprintf(page, PAGE_SIZE, "%s\n", "gennvm");
- } else if (strcmp(attr->name, "ppa_format") == 0) {
+ if (strcmp(attr->name, "ppa_format") == 0) {
return nvm_dev_attr_show_ppaf((void *)&dev_geo->c.addrf, page);
- } else if (strcmp(attr->name, "media_type") == 0) { /* u8 */
- return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.mtype);
- } else if (strcmp(attr->name, "flash_media_type") == 0) {
- return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.fmtype);
} else if (strcmp(attr->name, "num_channels") == 0) {
return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->num_ch);
} else if (strcmp(attr->name, "num_luns") == 0) {
@@ -1011,8 +1019,6 @@ static ssize_t nvm_dev_attr_show_12(struct device *dev,
return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.fpg_sz);
} else if (strcmp(attr->name, "hw_sector_size") == 0) {
return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.csecs);
- } else if (strcmp(attr->name, "oob_sector_size") == 0) {/* u32 */
- return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.sos);
} else if (strcmp(attr->name, "prog_typ") == 0) {
return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.tprt);
} else if (strcmp(attr->name, "prog_max") == 0) {
@@ -1021,13 +1027,21 @@ static ssize_t nvm_dev_attr_show_12(struct device *dev,
return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.tbet);
} else if (strcmp(attr->name, "erase_max") == 0) {
return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.tbem);
+ } else if (strcmp(attr->name, "vendor_opcode") == 0) {
+ return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.vmnt);
+ } else if (strcmp(attr->name, "device_mode") == 0) {
+ return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.dom);
+ /* kept for compatibility */
+ } else if (strcmp(attr->name, "media_manager") == 0) {
+ return scnprintf(page, PAGE_SIZE, "%s\n", "gennvm");
+ } else if (strcmp(attr->name, "capabilities") == 0) {
+ return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.cap);
+ } else if (strcmp(attr->name, "media_type") == 0) { /* u8 */
+ return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.mtype);
+ } else if (strcmp(attr->name, "flash_media_type") == 0) {
+ return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.fmtype);
} else if (strcmp(attr->name, "multiplane_modes") == 0) {
return scnprintf(page, PAGE_SIZE, "0x%08x\n", dev_geo->c.mpos);
- } else if (strcmp(attr->name, "media_capabilities") == 0) {
- return scnprintf(page, PAGE_SIZE, "0x%08x\n", dev_geo->c.mccap);
- } else if (strcmp(attr->name, "max_phys_secs") == 0) {
- return scnprintf(page, PAGE_SIZE, "%u\n",
- ndev->ops->max_phys_sect);
} else {
return scnprintf(page, PAGE_SIZE,
"Unhandled attr(%s) in `nvm_dev_attr_show_12`\n",
@@ -1035,6 +1049,17 @@ static ssize_t nvm_dev_attr_show_12(struct device *dev,
}
}
+static ssize_t nvm_dev_attr_show_lbaf(struct nvm_addr_format *lbaf,
+ char *page)
+{
+ return scnprintf(page, PAGE_SIZE,
+ "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
+ lbaf->ch_offset, lbaf->ch_len,
+ lbaf->lun_offset, lbaf->lun_len,
+ lbaf->chk_offset, lbaf->chk_len,
+ lbaf->sec_offset, lbaf->sec_len);
+}
+
static ssize_t nvm_dev_attr_show_20(struct device *dev,
struct device_attribute *dattr, char *page)
{
@@ -1048,20 +1073,14 @@ static ssize_t nvm_dev_attr_show_20(struct device *dev,
attr = &dattr->attr;
- if (strcmp(attr->name, "groups") == 0) {
+ if (strcmp(attr->name, "lba_format") == 0) {
+ return nvm_dev_attr_show_lbaf((void *)&dev_geo->c.addrf, page);
+ } else if (strcmp(attr->name, "groups") == 0) {
return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->num_ch);
} else if (strcmp(attr->name, "punits") == 0) {
return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->num_lun);
} else if (strcmp(attr->name, "chunks") == 0) {
return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.num_chk);
- } else if (strcmp(attr->name, "clba") == 0) {
- return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.clba);
- } else if (strcmp(attr->name, "ws_min") == 0) {
- return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.ws_min);
- } else if (strcmp(attr->name, "ws_opt") == 0) {
- return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.ws_opt);
- } else if (strcmp(attr->name, "mw_cunits") == 0) {
- return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.mw_cunits);
} else if (strcmp(attr->name, "write_typ") == 0) {
return scnprintf(page, PAGE_SIZE, "%u\n", dev_geo->c.tprt);
} else if (strcmp(attr->name, "write_max") == 0) {
@@ -1086,7 +1105,19 @@ static ssize_t nvm_dev_attr_show_20(struct device *dev,
/* general attributes */
static NVM_DEV_ATTR_RO(version);
-static NVM_DEV_ATTR_RO(capabilities);
+
+static NVM_DEV_ATTR_RO(ws_min);
+static NVM_DEV_ATTR_RO(ws_opt);
+static NVM_DEV_ATTR_RO(mw_cunits);
+static NVM_DEV_ATTR_RO(maxoc);
+static NVM_DEV_ATTR_RO(maxocpu);
+
+static NVM_DEV_ATTR_RO(media_capabilities);
+static NVM_DEV_ATTR_RO(max_phys_secs);
+
+static NVM_DEV_ATTR_RO(clba);
+static NVM_DEV_ATTR_RO(csecs);
+static NVM_DEV_ATTR_RO(sos);
static NVM_DEV_ATTR_RO(read_typ);
static NVM_DEV_ATTR_RO(read_max);
@@ -1105,42 +1136,53 @@ static NVM_DEV_ATTR_12_RO(num_blocks);
static NVM_DEV_ATTR_12_RO(num_pages);
static NVM_DEV_ATTR_12_RO(page_size);
static NVM_DEV_ATTR_12_RO(hw_sector_size);
-static NVM_DEV_ATTR_12_RO(oob_sector_size);
static NVM_DEV_ATTR_12_RO(prog_typ);
static NVM_DEV_ATTR_12_RO(prog_max);
static NVM_DEV_ATTR_12_RO(erase_typ);
static NVM_DEV_ATTR_12_RO(erase_max);
static NVM_DEV_ATTR_12_RO(multiplane_modes);
-static NVM_DEV_ATTR_12_RO(media_capabilities);
-static NVM_DEV_ATTR_12_RO(max_phys_secs);
+static NVM_DEV_ATTR_12_RO(capabilities);
static struct attribute *nvm_dev_attrs_12[] = {
&dev_attr_version.attr,
- &dev_attr_capabilities.attr,
-
- &dev_attr_vendor_opcode.attr,
- &dev_attr_device_mode.attr,
- &dev_attr_media_manager.attr,
&dev_attr_ppa_format.attr,
- &dev_attr_media_type.attr,
- &dev_attr_flash_media_type.attr,
+
&dev_attr_num_channels.attr,
&dev_attr_num_luns.attr,
&dev_attr_num_planes.attr,
&dev_attr_num_blocks.attr,
&dev_attr_num_pages.attr,
&dev_attr_page_size.attr,
+
&dev_attr_hw_sector_size.attr,
- &dev_attr_oob_sector_size.attr,
+
+ &dev_attr_clba.attr,
+ &dev_attr_csecs.attr,
+ &dev_attr_sos.attr,
+
+ &dev_attr_ws_min.attr,
+ &dev_attr_ws_opt.attr,
+ &dev_attr_maxoc.attr,
+ &dev_attr_maxocpu.attr,
+ &dev_attr_mw_cunits.attr,
+
+ &dev_attr_media_capabilities.attr,
+ &dev_attr_max_phys_secs.attr,
+

This breaks user-space. The intention is for user-space to decide based on version id. Then it can either retrieve the 1.2 or 2.0 attributes. The 2.0 attributes should not be available when a device is 1.2.

&dev_attr_read_typ.attr,
&dev_attr_read_max.attr,
&dev_attr_prog_typ.attr,
&dev_attr_prog_max.attr,
&dev_attr_erase_typ.attr,
&dev_attr_erase_max.attr,
+
+ &dev_attr_vendor_opcode.attr,
+ &dev_attr_device_mode.attr,
+ &dev_attr_media_manager.attr,
+ &dev_attr_capabilities.attr,
+ &dev_attr_media_type.attr,
+ &dev_attr_flash_media_type.attr,
&dev_attr_multiplane_modes.attr,
- &dev_attr_media_capabilities.attr,
- &dev_attr_max_phys_secs.attr,
NULL,
};
@@ -1152,12 +1194,9 @@ static const struct attribute_group nvm_dev_attr_group_12 = {
/* 2.0 values */
static NVM_DEV_ATTR_20_RO(groups);
+static NVM_DEV_ATTR_20_RO(lba_format);
static NVM_DEV_ATTR_20_RO(punits);
static NVM_DEV_ATTR_20_RO(chunks);
-static NVM_DEV_ATTR_20_RO(clba);
-static NVM_DEV_ATTR_20_RO(ws_min);
-static NVM_DEV_ATTR_20_RO(ws_opt);
-static NVM_DEV_ATTR_20_RO(mw_cunits);
static NVM_DEV_ATTR_20_RO(write_typ);
static NVM_DEV_ATTR_20_RO(write_max);
static NVM_DEV_ATTR_20_RO(reset_typ);
@@ -1165,16 +1204,25 @@ static NVM_DEV_ATTR_20_RO(reset_max);
static struct attribute *nvm_dev_attrs_20[] = {
&dev_attr_version.attr,
- &dev_attr_capabilities.attr,
+ &dev_attr_lba_format.attr,
&dev_attr_groups.attr,
&dev_attr_punits.attr,
&dev_attr_chunks.attr,
+
&dev_attr_clba.attr,
+ &dev_attr_csecs.attr,
+ &dev_attr_sos.attr,

csecs and sos are derived from the the generic block device data structures.

+
&dev_attr_ws_min.attr,
&dev_attr_ws_opt.attr,
+ &dev_attr_maxoc.attr,
+ &dev_attr_maxocpu.attr,

When the maxoc/maxocpu are in another patch, these changes can be included.

&dev_attr_mw_cunits.attr,
+ &dev_attr_media_capabilities.attr,

What is the meaning of media in this context? The 2.0 spec defines vector copy and double resets in its capabilities, it does not have media in mind.

+ &dev_attr_max_phys_secs.attr,
+

I kill max_phys_secs in another patch. It has been made redundant after null_blk has been removed.

&dev_attr_read_typ.attr,
&dev_attr_read_max.attr,
&dev_attr_write_typ.attr,

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