diff options
author | Dave Jiang <dave.jiang@intel.com> | 2023-05-19 02:38:20 +0300 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-05-30 16:17:27 +0300 |
commit | 84b54b5e2d89d22d5aaa0bfd6e03425678c85f71 (patch) | |
tree | 3cd5cdfd2303b03d8ca1da706402c352f8c558fd | |
parent | 9eb6f0935415b8174883fe0c59a5cb9c4e422d48 (diff) | |
download | linux-84b54b5e2d89d22d5aaa0bfd6e03425678c85f71.tar.xz |
cxl: Move cxl_await_media_ready() to before capacity info retrieval
commit e764f12208b99ac7892c4e3f6bf88d71ca71036f upstream.
Move cxl_await_media_ready() to cxl_pci probe before driver starts issuing
IDENTIFY and retrieving memory device information to ensure that the
device is ready to provide the information. Allow cxl_pci_probe() to succeed
even if media is not ready. Cache the media failure in cxlds and don't ask
the device for any media information.
The rationale for proceeding in the !media_ready case is to allow for
mailbox operations to interrogate and/or remediate the device. After
media is repaired then rebinding the cxl_pci driver is expected to
restart the capacity scan.
Suggested-by: Dan Williams <dan.j.williams@intel.com>
Fixes: b39cb1052a5c ("cxl/mem: Register CXL memX devices")
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/168445310026.3251520.8124296540679268206.stgit@djiang5-mobl3
[djbw: fixup cxl_test]
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r-- | drivers/cxl/core/mbox.c | 15 | ||||
-rw-r--r-- | drivers/cxl/cxlmem.h | 2 | ||||
-rw-r--r-- | drivers/cxl/mem.c | 3 | ||||
-rw-r--r-- | drivers/cxl/pci.c | 6 | ||||
-rw-r--r-- | drivers/cxl/port.c | 6 | ||||
-rw-r--r-- | tools/testing/cxl/test/mem.c | 1 |
6 files changed, 22 insertions, 11 deletions
diff --git a/drivers/cxl/core/mbox.c b/drivers/cxl/core/mbox.c index f2addb457172..114e15d02bde 100644 --- a/drivers/cxl/core/mbox.c +++ b/drivers/cxl/core/mbox.c @@ -984,7 +984,7 @@ static int cxl_mem_get_partition_info(struct cxl_dev_state *cxlds) * cxl_dev_state_identify() - Send the IDENTIFY command to the device. * @cxlds: The device data for the operation * - * Return: 0 if identify was executed successfully. + * Return: 0 if identify was executed successfully or media not ready. * * This will dispatch the identify command to the device and on success populate * structures to be exported to sysfs. @@ -996,6 +996,9 @@ int cxl_dev_state_identify(struct cxl_dev_state *cxlds) struct cxl_mbox_cmd mbox_cmd; int rc; + if (!cxlds->media_ready) + return 0; + mbox_cmd = (struct cxl_mbox_cmd) { .opcode = CXL_MBOX_OP_IDENTIFY, .size_out = sizeof(id), @@ -1065,10 +1068,12 @@ int cxl_mem_create_range_info(struct cxl_dev_state *cxlds) cxlds->persistent_only_bytes, "pmem"); } - rc = cxl_mem_get_partition_info(cxlds); - if (rc) { - dev_err(dev, "Failed to query partition information\n"); - return rc; + if (cxlds->media_ready) { + rc = cxl_mem_get_partition_info(cxlds); + if (rc) { + dev_err(dev, "Failed to query partition information\n"); + return rc; + } } rc = add_dpa_res(dev, &cxlds->dpa_res, &cxlds->ram_res, 0, diff --git a/drivers/cxl/cxlmem.h b/drivers/cxl/cxlmem.h index 090acebba4fa..2c97acfa8416 100644 --- a/drivers/cxl/cxlmem.h +++ b/drivers/cxl/cxlmem.h @@ -227,6 +227,7 @@ struct cxl_event_state { * @regs: Parsed register blocks * @cxl_dvsec: Offset to the PCIe device DVSEC * @rcd: operating in RCD mode (CXL 3.0 9.11.8 CXL Devices Attached to an RCH) + * @media_ready: Indicate whether the device media is usable * @payload_size: Size of space for payload * (CXL 2.0 8.2.8.4.3 Mailbox Capabilities Register) * @lsa_size: Size of Label Storage Area @@ -264,6 +265,7 @@ struct cxl_dev_state { int cxl_dvsec; bool rcd; + bool media_ready; size_t payload_size; size_t lsa_size; struct mutex mbox_mutex; /* Protects device mailbox and firmware */ diff --git a/drivers/cxl/mem.c b/drivers/cxl/mem.c index 39c4b54f0715..71d7eafb6c94 100644 --- a/drivers/cxl/mem.c +++ b/drivers/cxl/mem.c @@ -104,6 +104,9 @@ static int cxl_mem_probe(struct device *dev) struct dentry *dentry; int rc; + if (!cxlds->media_ready) + return -EBUSY; + /* * Someone is trying to reattach this device after it lost its port * connection (an endpoint port previously registered by this memdev was diff --git a/drivers/cxl/pci.c b/drivers/cxl/pci.c index 60b23624d167..24a2ad5caeb7 100644 --- a/drivers/cxl/pci.c +++ b/drivers/cxl/pci.c @@ -757,6 +757,12 @@ static int cxl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) if (rc) dev_dbg(&pdev->dev, "Failed to map RAS capability.\n"); + rc = cxl_await_media_ready(cxlds); + if (rc == 0) + cxlds->media_ready = true; + else + dev_warn(&pdev->dev, "Media not active (%d)\n", rc); + rc = cxl_pci_setup_mailbox(cxlds); if (rc) return rc; diff --git a/drivers/cxl/port.c b/drivers/cxl/port.c index 17a95f469c26..c23b6164e1c0 100644 --- a/drivers/cxl/port.c +++ b/drivers/cxl/port.c @@ -117,12 +117,6 @@ static int cxl_endpoint_port_probe(struct cxl_port *port) if (rc) return rc; - rc = cxl_await_media_ready(cxlds); - if (rc) { - dev_err(&port->dev, "Media not active (%d)\n", rc); - return rc; - } - rc = devm_cxl_enumerate_decoders(cxlhdm, &info); if (rc) return rc; diff --git a/tools/testing/cxl/test/mem.c b/tools/testing/cxl/test/mem.c index 9263b04d35f7..2c153cdeb420 100644 --- a/tools/testing/cxl/test/mem.c +++ b/tools/testing/cxl/test/mem.c @@ -1010,6 +1010,7 @@ static int cxl_mock_mem_probe(struct platform_device *pdev) if (rc) return rc; + cxlds->media_ready = true; rc = cxl_dev_state_identify(cxlds); if (rc) return rc; |