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From 70f82e7201fd2d85b99113395e386f7e4923e276 Mon Sep 17 00:00:00 2001
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From: Artur Paszkiewicz <artur.paszkiewicz@intel.com>
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Date: Fri, 28 Feb 2014 11:29:27 +0100
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Subject: [PATCH 1/2] imsm: support for second AHCI controller in EFI mode
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mdadm was unable to find IMSM platform capabilities when only the second
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AHCI controller was enabled on a platform in EFI mode. The second AHCI
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controller uses a different EFI variable and this patch adds support for
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reading this variable.
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Signed-off-by: Artur Paszkiewicz <artur.paszkiewicz@intel.com>
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Reviewed-by: Lukasz Dorau <lukasz.dorau@intel.com>
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---
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platform-intel.c | 11 ++++++++++-
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1 file changed, 10 insertions(+), 1 deletion(-)
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diff --git a/platform-intel.c b/platform-intel.c
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index f347382..77f8639 100644
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--- a/platform-intel.c
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+++ b/platform-intel.c
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@@ -343,6 +343,7 @@ static const struct imsm_orom *find_imsm_hba_orom(enum sys_dev_type hba_id)
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#define SYS_EFI_VAR_PATH "/sys/firmware/efi/vars"
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#define SCU_PROP "RstScuV"
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#define AHCI_PROP "RstSataV"
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+#define AHCI_SSATA_PROP "RstsSatV"
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#define VENDOR_GUID \
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EFI_GUID(0x193dfefa, 0xa445, 0x4302, 0x99, 0xd8, 0xef, 0x3a, 0xad, 0x1a, 0x04, 0xc6)
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@@ -397,6 +398,8 @@ int read_efi_variable(void *buffer, ssize_t buf_size, char *variable_name, struc
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const struct imsm_orom *find_imsm_efi(enum sys_dev_type hba_id)
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{
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+ int err;
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+
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if (hba_id >= SYS_DEV_MAX)
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return NULL;
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@@ -419,7 +422,13 @@ const struct imsm_orom *find_imsm_efi(enum sys_dev_type hba_id)
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if (check_env("IMSM_TEST_OROM"))
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return NULL;
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- if (read_efi_variable(&imsm_efi[hba_id], sizeof(imsm_efi[0]), hba_id == SYS_DEV_SAS ? SCU_PROP : AHCI_PROP, VENDOR_GUID)) {
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+ err = read_efi_variable(&imsm_efi[hba_id], sizeof(imsm_efi[0]), hba_id == SYS_DEV_SAS ? SCU_PROP : AHCI_PROP, VENDOR_GUID);
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+
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+ /* try to read variable for second AHCI controller */
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+ if (err && hba_id == SYS_DEV_SATA)
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+ err = read_efi_variable(&imsm_efi[hba_id], sizeof(imsm_efi[0]), AHCI_SSATA_PROP, VENDOR_GUID);
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+
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+ if (err) {
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populated_efi[hba_id] = 0;
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return NULL;
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}
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--
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1.8.5.3
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