PCI/switchtec: Add Gen4 flash information interface support

Add the new flash_info registers struct and the implementation of
ioctl_flash_part_info() for the new Gen4 hardware.

[logang@deltatee.com: rewrote commit message]
Link: https://lore.kernel.org/r/20200115035648.2578-7-logang@deltatee.com
Signed-off-by: Kelvin Cao <kelvin.cao@microchip.com>
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

3 files changed, 171 insertions, 0 deletions

diff --git a/drivers/pci/switch/switchtec.c b/drivers/pci/switch/switchtec.c
index b09c3f53a552..af85d232d200 100644
--- a/drivers/pci/switch/switchtec.c
+++ b/drivers/pci/switch/switchtec.c
@@ -600,6 +600,9 @@ static int ioctl_flash_info(struct switchtec_dev *stdev,
 	if (stdev->gen == SWITCHTEC_GEN3) {
 		info.flash_length = ioread32(&fi->gen3.flash_length);
 		info.num_partitions = SWITCHTEC_NUM_PARTITIONS_GEN3;
+	} else if (stdev->gen == SWITCHTEC_GEN4) {
+		info.flash_length = ioread32(&fi->gen4.flash_length);
+		info.num_partitions = SWITCHTEC_NUM_PARTITIONS_GEN4;
 	} else {
 		return -ENOTSUPP;
 	}
@@ -687,6 +690,110 @@ static int flash_part_info_gen3(struct switchtec_dev *stdev,
 	return 0;
 }
 
+static int flash_part_info_gen4(struct switchtec_dev *stdev,
+		struct switchtec_ioctl_flash_part_info *info)
+{
+	struct flash_info_regs_gen4 __iomem *fi = &stdev->mmio_flash_info->gen4;
+	struct sys_info_regs_gen4 __iomem *si = &stdev->mmio_sys_info->gen4;
+	struct active_partition_info_gen4 __iomem *af = &fi->active_flag;
+
+	switch (info->flash_partition) {
+	case SWITCHTEC_IOCTL_PART_MAP_0:
+		set_fw_info_part(info, &fi->map0);
+		break;
+	case SWITCHTEC_IOCTL_PART_MAP_1:
+		set_fw_info_part(info, &fi->map1);
+		break;
+	case SWITCHTEC_IOCTL_PART_KEY_0:
+		set_fw_info_part(info, &fi->key0);
+		if (ioread8(&af->key) == SWITCHTEC_GEN4_KEY0_ACTIVE)
+			info->active |= SWITCHTEC_IOCTL_PART_ACTIVE;
+		if (ioread16(&si->key_running) == SWITCHTEC_GEN4_KEY0_RUNNING)
+			info->active |= SWITCHTEC_IOCTL_PART_RUNNING;
+		break;
+	case SWITCHTEC_IOCTL_PART_KEY_1:
+		set_fw_info_part(info, &fi->key1);
+		if (ioread8(&af->key) == SWITCHTEC_GEN4_KEY1_ACTIVE)
+			info->active |= SWITCHTEC_IOCTL_PART_ACTIVE;
+		if (ioread16(&si->key_running) == SWITCHTEC_GEN4_KEY1_RUNNING)
+			info->active |= SWITCHTEC_IOCTL_PART_RUNNING;
+		break;
+	case SWITCHTEC_IOCTL_PART_BL2_0:
+		set_fw_info_part(info, &fi->bl2_0);
+		if (ioread8(&af->bl2) == SWITCHTEC_GEN4_BL2_0_ACTIVE)
+			info->active |= SWITCHTEC_IOCTL_PART_ACTIVE;
+		if (ioread16(&si->bl2_running) == SWITCHTEC_GEN4_BL2_0_RUNNING)
+			info->active |= SWITCHTEC_IOCTL_PART_RUNNING;
+		break;
+	case SWITCHTEC_IOCTL_PART_BL2_1:
+		set_fw_info_part(info, &fi->bl2_1);
+		if (ioread8(&af->bl2) == SWITCHTEC_GEN4_BL2_1_ACTIVE)
+			info->active |= SWITCHTEC_IOCTL_PART_ACTIVE;
+		if (ioread16(&si->bl2_running) == SWITCHTEC_GEN4_BL2_1_RUNNING)
+			info->active |= SWITCHTEC_IOCTL_PART_RUNNING;
+		break;
+	case SWITCHTEC_IOCTL_PART_CFG0:
+		set_fw_info_part(info, &fi->cfg0);
+		if (ioread8(&af->cfg) == SWITCHTEC_GEN4_CFG0_ACTIVE)
+			info->active |= SWITCHTEC_IOCTL_PART_ACTIVE;
+		if (ioread16(&si->cfg_running) == SWITCHTEC_GEN4_CFG0_RUNNING)
+			info->active |= SWITCHTEC_IOCTL_PART_RUNNING;
+		break;
+	case SWITCHTEC_IOCTL_PART_CFG1:
+		set_fw_info_part(info, &fi->cfg1);
+		if (ioread8(&af->cfg) == SWITCHTEC_GEN4_CFG1_ACTIVE)
+			info->active |= SWITCHTEC_IOCTL_PART_ACTIVE;
+		if (ioread16(&si->cfg_running) == SWITCHTEC_GEN4_CFG1_RUNNING)
+			info->active |= SWITCHTEC_IOCTL_PART_RUNNING;
+		break;
+	case SWITCHTEC_IOCTL_PART_IMG0:
+		set_fw_info_part(info, &fi->img0);
+		if (ioread8(&af->img) == SWITCHTEC_GEN4_IMG0_ACTIVE)
+			info->active |= SWITCHTEC_IOCTL_PART_ACTIVE;
+		if (ioread16(&si->img_running) == SWITCHTEC_GEN4_IMG0_RUNNING)
+			info->active |= SWITCHTEC_IOCTL_PART_RUNNING;
+		break;
+	case SWITCHTEC_IOCTL_PART_IMG1:
+		set_fw_info_part(info, &fi->img1);
+		if (ioread8(&af->img) == SWITCHTEC_GEN4_IMG1_ACTIVE)
+			info->active |= SWITCHTEC_IOCTL_PART_ACTIVE;
+		if (ioread16(&si->img_running) == SWITCHTEC_GEN4_IMG1_RUNNING)
+			info->active |= SWITCHTEC_IOCTL_PART_RUNNING;
+		break;
+	case SWITCHTEC_IOCTL_PART_NVLOG:
+		set_fw_info_part(info, &fi->nvlog);
+		break;
+	case SWITCHTEC_IOCTL_PART_VENDOR0:
+		set_fw_info_part(info, &fi->vendor[0]);
+		break;
+	case SWITCHTEC_IOCTL_PART_VENDOR1:
+		set_fw_info_part(info, &fi->vendor[1]);
+		break;
+	case SWITCHTEC_IOCTL_PART_VENDOR2:
+		set_fw_info_part(info, &fi->vendor[2]);
+		break;
+	case SWITCHTEC_IOCTL_PART_VENDOR3:
+		set_fw_info_part(info, &fi->vendor[3]);
+		break;
+	case SWITCHTEC_IOCTL_PART_VENDOR4:
+		set_fw_info_part(info, &fi->vendor[4]);
+		break;
+	case SWITCHTEC_IOCTL_PART_VENDOR5:
+		set_fw_info_part(info, &fi->vendor[5]);
+		break;
+	case SWITCHTEC_IOCTL_PART_VENDOR6:
+		set_fw_info_part(info, &fi->vendor[6]);
+		break;
+	case SWITCHTEC_IOCTL_PART_VENDOR7:
+		set_fw_info_part(info, &fi->vendor[7]);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
 static int ioctl_flash_part_info(struct switchtec_dev *stdev,
 		struct switchtec_ioctl_flash_part_info __user *uinfo)
 {
@@ -700,6 +807,10 @@ static int ioctl_flash_part_info(struct switchtec_dev *stdev,
 		ret = flash_part_info_gen3(stdev, &info);
 		if (ret)
 			return ret;
+	} else if (stdev->gen == SWITCHTEC_GEN4) {
+		ret = flash_part_info_gen4(stdev, &info);
+		if (ret)
+			return ret;
 	} else {
 		return -ENOTSUPP;
 	}
diff --git a/include/linux/switchtec.h b/include/linux/switchtec.h
index d012520e5cc5..e85155244135 100644
--- a/include/linux/switchtec.h
+++ b/include/linux/switchtec.h
@@ -109,6 +109,30 @@ enum {
 	SWITCHTEC_GEN3_IMG1_RUNNING = 0x07,
 };
 
+enum {
+	SWITCHTEC_GEN4_MAP0_RUNNING = 0x00,
+	SWITCHTEC_GEN4_MAP1_RUNNING = 0x01,
+	SWITCHTEC_GEN4_KEY0_RUNNING = 0x02,
+	SWITCHTEC_GEN4_KEY1_RUNNING = 0x03,
+	SWITCHTEC_GEN4_BL2_0_RUNNING = 0x04,
+	SWITCHTEC_GEN4_BL2_1_RUNNING = 0x05,
+	SWITCHTEC_GEN4_CFG0_RUNNING = 0x06,
+	SWITCHTEC_GEN4_CFG1_RUNNING = 0x07,
+	SWITCHTEC_GEN4_IMG0_RUNNING = 0x08,
+	SWITCHTEC_GEN4_IMG1_RUNNING = 0x09,
+};
+
+enum {
+	SWITCHTEC_GEN4_KEY0_ACTIVE = 0,
+	SWITCHTEC_GEN4_KEY1_ACTIVE = 1,
+	SWITCHTEC_GEN4_BL2_0_ACTIVE = 0,
+	SWITCHTEC_GEN4_BL2_1_ACTIVE = 1,
+	SWITCHTEC_GEN4_CFG0_ACTIVE = 0,
+	SWITCHTEC_GEN4_CFG1_ACTIVE = 1,
+	SWITCHTEC_GEN4_IMG0_ACTIVE = 0,
+	SWITCHTEC_GEN4_IMG1_ACTIVE = 1,
+};
+
 struct sys_info_regs_gen3 {
 	u32 reserved1;
 	u32 vendor_table_revision;
@@ -205,9 +229,37 @@ struct flash_info_regs_gen3 {
 	struct partition_info vendor[8];
 };
 
+struct flash_info_regs_gen4 {
+	u32 flash_address;
+	u32 flash_length;
+
+	struct active_partition_info_gen4 {
+		unsigned char bl2;
+		unsigned char cfg;
+		unsigned char img;
+		unsigned char key;
+	} active_flag;
+
+	u32 reserved[3];
+
+	struct partition_info map0;
+	struct partition_info map1;
+	struct partition_info key0;
+	struct partition_info key1;
+	struct partition_info bl2_0;
+	struct partition_info bl2_1;
+	struct partition_info cfg0;
+	struct partition_info cfg1;
+	struct partition_info img0;
+	struct partition_info img1;
+	struct partition_info nvlog;
+	struct partition_info vendor[8];
+};
+
 struct flash_info_regs {
 	union {
 		struct flash_info_regs_gen3 gen3;
+		struct flash_info_regs_gen4 gen4;
 	};
 };
 
diff --git a/include/uapi/linux/switchtec_ioctl.h b/include/uapi/linux/switchtec_ioctl.h
index 4d09cfa2e9e6..2c661a3557e5 100644
--- a/include/uapi/linux/switchtec_ioctl.h
+++ b/include/uapi/linux/switchtec_ioctl.h
@@ -32,7 +32,15 @@
 #define SWITCHTEC_IOCTL_PART_VENDOR5	10
 #define SWITCHTEC_IOCTL_PART_VENDOR6	11
 #define SWITCHTEC_IOCTL_PART_VENDOR7	12
+#define SWITCHTEC_IOCTL_PART_BL2_0	13
+#define SWITCHTEC_IOCTL_PART_BL2_1	14
+#define SWITCHTEC_IOCTL_PART_MAP_0	15
+#define SWITCHTEC_IOCTL_PART_MAP_1	16
+#define SWITCHTEC_IOCTL_PART_KEY_0	17
+#define SWITCHTEC_IOCTL_PART_KEY_1	18
+
 #define SWITCHTEC_NUM_PARTITIONS_GEN3	13
+#define SWITCHTEC_NUM_PARTITIONS_GEN4	19
 
 /* obsolete: for compatibility with old userspace software */
 #define SWITCHTEC_IOCTL_NUM_PARTITIONS	SWITCHTEC_NUM_PARTITIONS_GEN3