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| author | Ben Widawsky <ben.widawsky@intel.com> | 2022-01-23 16:31:13 -0800 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2022-02-08 22:57:31 -0800 |
| commit | 523e594d9cc03db962c741ce02c8a58aab58a123 (patch) | |
| tree | 0c8479f68282ffca41e7e82306bbf2961fc8f4e4 /tools/testing/cxl | |
| parent | 560f78559006a4bab20455ae7eca33d8417c38fc (diff) | |
| download | linux-stable-523e594d9cc03db962c741ce02c8a58aab58a123.tar.gz linux-stable-523e594d9cc03db962c741ce02c8a58aab58a123.tar.bz2 linux-stable-523e594d9cc03db962c741ce02c8a58aab58a123.zip | |
cxl/pci: Implement wait for media active
CXL 2.0 8.1.3.8.2 states:
Memory_Active: When set, indicates that the CXL Range 1 memory is
fully initialized and available for software use. Must be set within
Range 1. Memory_Active_Timeout of deassertion of reset to CXL device
if CXL.mem HwInit Mode=1
Unfortunately, Memory_Active can take quite a long time depending on
media size (up to 256s per 2.0 spec). Provide a callback for the
eventual establishment of CXL.mem operations via the 'cxl_mem' driver
the 'struct cxl_memdev'. The implementation waits for 60s by default for
now and can be overridden by the mbox_ready_time module parameter.
Signed-off-by: Ben Widawsky <ben.widawsky@intel.com>
[djbw: switch to sleeping wait]
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://lore.kernel.org/r/164298427373.3018233.9309741847039301834.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'tools/testing/cxl')
| -rw-r--r-- | tools/testing/cxl/test/mem.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/tools/testing/cxl/test/mem.c b/tools/testing/cxl/test/mem.c index 8c2086c4caef..3af3f94de0c3 100644 --- a/tools/testing/cxl/test/mem.c +++ b/tools/testing/cxl/test/mem.c @@ -4,6 +4,7 @@ #include <linux/platform_device.h> #include <linux/mod_devicetable.h> #include <linux/module.h> +#include <linux/delay.h> #include <linux/sizes.h> #include <linux/bits.h> #include <cxlmem.h> @@ -236,6 +237,12 @@ static int cxl_mock_mbox_send(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd * return rc; } +static int cxl_mock_wait_media_ready(struct cxl_dev_state *cxlds) +{ + msleep(100); + return 0; +} + static void label_area_release(void *lsa) { vfree(lsa); @@ -262,6 +269,7 @@ static int cxl_mock_mem_probe(struct platform_device *pdev) return PTR_ERR(cxlds); cxlds->mbox_send = cxl_mock_mbox_send; + cxlds->wait_media_ready = cxl_mock_wait_media_ready; cxlds->payload_size = SZ_4K; rc = cxl_enumerate_cmds(cxlds); |