1 files changed, 243 insertions, 0 deletions

diff --git a/drivers/scsi/isci/probe_roms.c b/drivers/scsi/isci/probe_roms.c
new file mode 100644
index 000000000000..b5f4341de243
--- /dev/null
+++ b/drivers/scsi/isci/probe_roms.c
@@ -0,0 +1,243 @@
+/*
+ * This file is provided under a dual BSD/GPLv2 license.  When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ * The full GNU General Public License is included in this distribution
+ * in the file called LICENSE.GPL.
+ */
+
+/* probe_roms - scan for oem parameters */
+
+#include <linux/kernel.h>
+#include <linux/firmware.h>
+#include <linux/uaccess.h>
+#include <linux/efi.h>
+#include <asm/probe_roms.h>
+
+#include "isci.h"
+#include "task.h"
+#include "probe_roms.h"
+
+static efi_char16_t isci_efivar_name[] = {
+        'R', 's', 't', 'S', 'c', 'u', 'O'
+};
+
+struct isci_orom *isci_request_oprom(struct pci_dev *pdev)
+{
+        void __iomem *oprom = pci_map_biosrom(pdev);
+        struct isci_orom *rom = NULL;
+        size_t len, i;
+        int j;
+        char oem_sig[4];
+        struct isci_oem_hdr oem_hdr;
+        u8 *tmp, sum;
+
+        if (!oprom)
+                return NULL;
+
+        len = pci_biosrom_size(pdev);
+        rom = devm_kzalloc(&pdev->dev, sizeof(*rom), GFP_KERNEL);
+        if (!rom) {
+                dev_warn(&pdev->dev,
+                         "Unable to allocate memory for orom\n");
+                return NULL;
+        }
+
+        for (i = 0; i < len && rom; i += ISCI_OEM_SIG_SIZE) {
+                memcpy_fromio(oem_sig, oprom + i, ISCI_OEM_SIG_SIZE);
+
+                /* we think we found the OEM table */
+                if (memcmp(oem_sig, ISCI_OEM_SIG, ISCI_OEM_SIG_SIZE) == 0) {
+                        size_t copy_len;
+
+                        memcpy_fromio(&oem_hdr, oprom + i, sizeof(oem_hdr));
+
+                        copy_len = min(oem_hdr.len - sizeof(oem_hdr),
+                                       sizeof(*rom));
+
+                        memcpy_fromio(rom,
+                                      oprom + i + sizeof(oem_hdr),
+                                      copy_len);
+
+                        /* calculate checksum */
+                        tmp = (u8 *)&oem_hdr;
+                        for (j = 0, sum = 0; j < sizeof(oem_hdr); j++, tmp++)
+                                sum += *tmp;
+
+                        tmp = (u8 *)rom;
+                        for (j = 0; j < sizeof(*rom); j++, tmp++)
+                                sum += *tmp;
+
+                        if (sum != 0) {
+                                dev_warn(&pdev->dev,
+                                         "OEM table checksum failed\n");
+                                continue;
+                        }
+
+                        /* keep going if that's not the oem param table */
+                        if (memcmp(rom->hdr.signature,
+                                   ISCI_ROM_SIG,
+                                   ISCI_ROM_SIG_SIZE) != 0)
+                                continue;
+
+                        dev_info(&pdev->dev,
+                                 "OEM parameter table found in OROM\n");
+                        break;
+                }
+        }
+
+        if (i >= len) {
+                dev_err(&pdev->dev, "oprom parse error\n");
+                devm_kfree(&pdev->dev, rom);
+                rom = NULL;
+        }
+        pci_unmap_biosrom(oprom);
+
+        return rom;
+}
+
+enum sci_status isci_parse_oem_parameters(struct sci_oem_params *oem,
+                                          struct isci_orom *orom, int scu_index)
+{
+        /* check for valid inputs */
+        if (scu_index < 0 || scu_index >= SCI_MAX_CONTROLLERS ||
+            scu_index > orom->hdr.num_elements || !oem)
+                return -EINVAL;
+
+        *oem = orom->ctrl[scu_index];
+        return 0;
+}
+
+struct isci_orom *isci_request_firmware(struct pci_dev *pdev, const struct firmware *fw)
+{
+        struct isci_orom *orom = NULL, *data;
+        int i, j;
+
+        if (request_firmware(&fw, ISCI_FW_NAME, &pdev->dev) != 0)
+                return NULL;
+
+        if (fw->size < sizeof(*orom))
+                goto out;
+
+        data = (struct isci_orom *)fw->data;
+
+        if (strncmp(ISCI_ROM_SIG, data->hdr.signature,
+                    strlen(ISCI_ROM_SIG)) != 0)
+                goto out;
+
+        orom = devm_kzalloc(&pdev->dev, fw->size, GFP_KERNEL);
+        if (!orom)
+                goto out;
+
+        memcpy(orom, fw->data, fw->size);
+
+        if (is_c0(pdev))
+                goto out;
+
+        /*
+         * deprecated: override default amp_control for pre-preproduction
+         * silicon revisions
+         */
+        for (i = 0; i < ARRAY_SIZE(orom->ctrl); i++)
+                for (j = 0; j < ARRAY_SIZE(orom->ctrl[i].phys); j++) {
+                        orom->ctrl[i].phys[j].afe_tx_amp_control0 = 0xe7c03;
+                        orom->ctrl[i].phys[j].afe_tx_amp_control1 = 0xe7c03;
+                        orom->ctrl[i].phys[j].afe_tx_amp_control2 = 0xe7c03;
+                        orom->ctrl[i].phys[j].afe_tx_amp_control3 = 0xe7c03;
+                }
+ out:
+        release_firmware(fw);
+
+        return orom;
+}
+
+static struct efi *get_efi(void)
+{
+#ifdef CONFIG_EFI
+        return &efi;
+#else
+        return NULL;
+#endif
+}
+
+struct isci_orom *isci_get_efi_var(struct pci_dev *pdev)
+{
+        efi_status_t status;
+        struct isci_orom *rom;
+        struct isci_oem_hdr *oem_hdr;
+        u8 *tmp, sum;
+        int j;
+        unsigned long data_len;
+        u8 *efi_data;
+        u32 efi_attrib = 0;
+
+        data_len = 1024;
+        efi_data = devm_kzalloc(&pdev->dev, data_len, GFP_KERNEL);
+        if (!efi_data) {
+                dev_warn(&pdev->dev,
+                         "Unable to allocate memory for EFI data\n");
+                return NULL;
+        }
+
+        rom = (struct isci_orom *)(efi_data + sizeof(struct isci_oem_hdr));
+
+        if (get_efi())
+                status = get_efi()->get_variable(isci_efivar_name,
+                                                 &ISCI_EFI_VENDOR_GUID,
+                                                 &efi_attrib,
+                                                 &data_len,
+                                                 efi_data);
+        else
+                status = EFI_NOT_FOUND;
+
+        if (status != EFI_SUCCESS) {
+                dev_warn(&pdev->dev,
+                         "Unable to obtain EFI var data for OEM parms\n");
+                return NULL;
+        }
+
+        oem_hdr = (struct isci_oem_hdr *)efi_data;
+
+        if (memcmp(oem_hdr->sig, ISCI_OEM_SIG, ISCI_OEM_SIG_SIZE) != 0) {
+                dev_warn(&pdev->dev,
+                         "Invalid OEM header signature\n");
+                return NULL;
+        }
+
+        /* calculate checksum */
+        tmp = (u8 *)efi_data;
+        for (j = 0, sum = 0; j < (sizeof(*oem_hdr) + sizeof(*rom)); j++, tmp++)
+                sum += *tmp;
+
+        if (sum != 0) {
+                dev_warn(&pdev->dev,
+                         "OEM table checksum failed\n");
+                return NULL;
+        }
+
+        if (memcmp(rom->hdr.signature,
+                   ISCI_ROM_SIG,
+                   ISCI_ROM_SIG_SIZE) != 0) {
+                dev_warn(&pdev->dev,
+                         "Invalid OEM table signature\n");
+                return NULL;
+        }
+
+        return rom;
+}