^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (C) 2012-2020 IBM Corporation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Author: Ashley Lai <ashleydlai@gmail.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Maintained by: <tpmdd-devel@lists.sourceforge.net>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * Device driver for TCG/TCPA TPM (trusted platform module).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * Specifications at www.trustedcomputinggroup.org
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/dma-mapping.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/dmapool.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <asm/vio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <asm/irq.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/list.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/spinlock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/wait.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <asm/prom.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include "tpm.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include "tpm_ibmvtpm.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) static const char tpm_ibmvtpm_driver_name[] = "tpm_ibmvtpm";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) static const struct vio_device_id tpm_ibmvtpm_device_table[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) { "IBM,vtpm", "IBM,vtpm"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) { "IBM,vtpm", "IBM,vtpm20"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) { "", "" }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) MODULE_DEVICE_TABLE(vio, tpm_ibmvtpm_device_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) * ibmvtpm_send_crq_word() - Send a CRQ request
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) * @vdev: vio device struct
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) * @w1: pre-constructed first word of tpm crq (second word is reserved)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) * Return:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) * 0 - Success
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) * Non-zero - Failure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) static int ibmvtpm_send_crq_word(struct vio_dev *vdev, u64 w1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, w1, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) * ibmvtpm_send_crq() - Send a CRQ request
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) * @vdev: vio device struct
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) * @valid: Valid field
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) * @msg: Type field
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) * @len: Length field
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) * @data: Data field
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) * The ibmvtpm crq is defined as follows:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) * Byte | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) * -----------------------------------------------------------------------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) * Word0 | Valid | Type | Length | Data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) * -----------------------------------------------------------------------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) * Word1 | Reserved
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) * -----------------------------------------------------------------------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) * Which matches the following structure (on bigendian host):
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) * struct ibmvtpm_crq {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) * u8 valid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) * u8 msg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) * __be16 len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) * __be32 data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) * __be64 reserved;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) * } __attribute__((packed, aligned(8)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) * However, the value is passed in a register so just compute the numeric value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) * to load into the register avoiding byteswap altogether. Endian only affects
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) * memory loads and stores - registers are internally represented the same.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) * Return:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) * 0 (H_SUCCESS) - Success
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) * Non-zero - Failure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) static int ibmvtpm_send_crq(struct vio_dev *vdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) u8 valid, u8 msg, u16 len, u32 data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) u64 w1 = ((u64)valid << 56) | ((u64)msg << 48) | ((u64)len << 32) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) (u64)data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) return ibmvtpm_send_crq_word(vdev, w1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) * tpm_ibmvtpm_recv - Receive data after send
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) * @chip: tpm chip struct
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) * @buf: buffer to read
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) * @count: size of buffer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) * Return:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) * Number of bytes read
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) static int tpm_ibmvtpm_recv(struct tpm_chip *chip, u8 *buf, size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) struct ibmvtpm_dev *ibmvtpm = dev_get_drvdata(&chip->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) u16 len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) if (!ibmvtpm->rtce_buf) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) dev_err(ibmvtpm->dev, "ibmvtpm device is not ready\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) len = ibmvtpm->res_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) if (count < len) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) dev_err(ibmvtpm->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) "Invalid size in recv: count=%zd, crq_size=%d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) count, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) spin_lock(&ibmvtpm->rtce_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) memcpy((void *)buf, (void *)ibmvtpm->rtce_buf, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) memset(ibmvtpm->rtce_buf, 0, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) ibmvtpm->res_len = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) spin_unlock(&ibmvtpm->rtce_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) return len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) * ibmvtpm_crq_send_init - Send a CRQ initialize message
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) * @ibmvtpm: vtpm device struct
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) * Return:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) * 0 on success.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) * Non-zero on failure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) static int ibmvtpm_crq_send_init(struct ibmvtpm_dev *ibmvtpm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) rc = ibmvtpm_send_crq_word(ibmvtpm->vdev, INIT_CRQ_CMD);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) if (rc != H_SUCCESS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) dev_err(ibmvtpm->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) "%s failed rc=%d\n", __func__, rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) * tpm_ibmvtpm_resume - Resume from suspend
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) * @dev: device struct
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) * Return: Always 0.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) static int tpm_ibmvtpm_resume(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) struct tpm_chip *chip = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) struct ibmvtpm_dev *ibmvtpm = dev_get_drvdata(&chip->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) int rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) msleep(100);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) rc = plpar_hcall_norets(H_ENABLE_CRQ,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) ibmvtpm->vdev->unit_address);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) dev_err(dev, "Error enabling ibmvtpm rc=%d\n", rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) rc = vio_enable_interrupts(ibmvtpm->vdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) dev_err(dev, "Error vio_enable_interrupts rc=%d\n", rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) rc = ibmvtpm_crq_send_init(ibmvtpm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) dev_err(dev, "Error send_init rc=%d\n", rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) * tpm_ibmvtpm_send() - Send a TPM command
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) * @chip: tpm chip struct
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) * @buf: buffer contains data to send
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) * @count: size of buffer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) * Return:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) * 0 on success,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) * -errno on error
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) static int tpm_ibmvtpm_send(struct tpm_chip *chip, u8 *buf, size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) struct ibmvtpm_dev *ibmvtpm = dev_get_drvdata(&chip->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) bool retry = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) int rc, sig;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) if (!ibmvtpm->rtce_buf) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) dev_err(ibmvtpm->dev, "ibmvtpm device is not ready\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) if (count > ibmvtpm->rtce_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) dev_err(ibmvtpm->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) "Invalid size in send: count=%zd, rtce_size=%d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) count, ibmvtpm->rtce_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) if (ibmvtpm->tpm_processing_cmd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) dev_info(ibmvtpm->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) "Need to wait for TPM to finish\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) /* wait for previous command to finish */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) sig = wait_event_interruptible(ibmvtpm->wq, !ibmvtpm->tpm_processing_cmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) if (sig)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) return -EINTR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) spin_lock(&ibmvtpm->rtce_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) ibmvtpm->res_len = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) memcpy((void *)ibmvtpm->rtce_buf, (void *)buf, count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) * set the processing flag before the Hcall, since we may get the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) * result (interrupt) before even being able to check rc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) ibmvtpm->tpm_processing_cmd = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) again:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) rc = ibmvtpm_send_crq(ibmvtpm->vdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) IBMVTPM_VALID_CMD, VTPM_TPM_COMMAND,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) count, ibmvtpm->rtce_dma_handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) if (rc != H_SUCCESS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) * H_CLOSED can be returned after LPM resume. Call
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) * tpm_ibmvtpm_resume() to re-enable the CRQ then retry
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) * ibmvtpm_send_crq() once before failing.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) if (rc == H_CLOSED && retry) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) tpm_ibmvtpm_resume(ibmvtpm->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) retry = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) goto again;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) dev_err(ibmvtpm->dev, "tpm_ibmvtpm_send failed rc=%d\n", rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) ibmvtpm->tpm_processing_cmd = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) spin_unlock(&ibmvtpm->rtce_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) static void tpm_ibmvtpm_cancel(struct tpm_chip *chip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) static u8 tpm_ibmvtpm_status(struct tpm_chip *chip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) struct ibmvtpm_dev *ibmvtpm = dev_get_drvdata(&chip->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) return ibmvtpm->tpm_processing_cmd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) * ibmvtpm_crq_get_rtce_size - Send a CRQ request to get rtce size
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) * @ibmvtpm: vtpm device struct
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) * Return:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) * 0 on success.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) * Non-zero on failure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) static int ibmvtpm_crq_get_rtce_size(struct ibmvtpm_dev *ibmvtpm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) rc = ibmvtpm_send_crq(ibmvtpm->vdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) IBMVTPM_VALID_CMD, VTPM_GET_RTCE_BUFFER_SIZE, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) if (rc != H_SUCCESS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) dev_err(ibmvtpm->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) "ibmvtpm_crq_get_rtce_size failed rc=%d\n", rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) * ibmvtpm_crq_get_version - Send a CRQ request to get vtpm version
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) * - Note that this is vtpm version and not tpm version
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) * @ibmvtpm: vtpm device struct
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) * Return:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) * 0 on success.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) * Non-zero on failure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) static int ibmvtpm_crq_get_version(struct ibmvtpm_dev *ibmvtpm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) rc = ibmvtpm_send_crq(ibmvtpm->vdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) IBMVTPM_VALID_CMD, VTPM_GET_VERSION, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) if (rc != H_SUCCESS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) dev_err(ibmvtpm->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) "ibmvtpm_crq_get_version failed rc=%d\n", rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) * ibmvtpm_crq_send_init_complete - Send a CRQ initialize complete message
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) * @ibmvtpm: vtpm device struct
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) * Return:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) * 0 on success.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) * Non-zero on failure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) static int ibmvtpm_crq_send_init_complete(struct ibmvtpm_dev *ibmvtpm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) rc = ibmvtpm_send_crq_word(ibmvtpm->vdev, INIT_CRQ_COMP_CMD);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) if (rc != H_SUCCESS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) dev_err(ibmvtpm->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) "ibmvtpm_crq_send_init_complete failed rc=%d\n", rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) * tpm_ibmvtpm_remove - ibm vtpm remove entry point
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) * @vdev: vio device struct
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) * Return: Always 0.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) static int tpm_ibmvtpm_remove(struct vio_dev *vdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) struct tpm_chip *chip = dev_get_drvdata(&vdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) struct ibmvtpm_dev *ibmvtpm = dev_get_drvdata(&chip->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) int rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) tpm_chip_unregister(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) free_irq(vdev->irq, ibmvtpm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) msleep(100);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) dma_unmap_single(ibmvtpm->dev, ibmvtpm->crq_dma_handle,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) CRQ_RES_BUF_SIZE, DMA_BIDIRECTIONAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) free_page((unsigned long)ibmvtpm->crq_queue.crq_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) if (ibmvtpm->rtce_buf) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) dma_unmap_single(ibmvtpm->dev, ibmvtpm->rtce_dma_handle,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) ibmvtpm->rtce_size, DMA_BIDIRECTIONAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) kfree(ibmvtpm->rtce_buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) kfree(ibmvtpm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) /* For tpm_ibmvtpm_get_desired_dma */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) dev_set_drvdata(&vdev->dev, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) * tpm_ibmvtpm_get_desired_dma - Get DMA size needed by this driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) * @vdev: vio device struct
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) * Return:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) * Number of bytes the driver needs to DMA map.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) static unsigned long tpm_ibmvtpm_get_desired_dma(struct vio_dev *vdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) struct tpm_chip *chip = dev_get_drvdata(&vdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) struct ibmvtpm_dev *ibmvtpm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) * ibmvtpm initializes at probe time, so the data we are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) * asking for may not be set yet. Estimate that 4K required
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) * for TCE-mapped buffer in addition to CRQ.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) if (chip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) ibmvtpm = dev_get_drvdata(&chip->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) return CRQ_RES_BUF_SIZE + PAGE_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) return CRQ_RES_BUF_SIZE + ibmvtpm->rtce_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) * tpm_ibmvtpm_suspend - Suspend
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) * @dev: device struct
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) * Return: Always 0.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) static int tpm_ibmvtpm_suspend(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) struct tpm_chip *chip = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) struct ibmvtpm_dev *ibmvtpm = dev_get_drvdata(&chip->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) int rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) rc = ibmvtpm_send_crq(ibmvtpm->vdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) IBMVTPM_VALID_CMD, VTPM_PREPARE_TO_SUSPEND, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) if (rc != H_SUCCESS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) dev_err(ibmvtpm->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) "tpm_ibmvtpm_suspend failed rc=%d\n", rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) * ibmvtpm_reset_crq - Reset CRQ
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) * @ibmvtpm: ibm vtpm struct
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) * Return:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) * 0 on success.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) * Non-zero on failure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) static int ibmvtpm_reset_crq(struct ibmvtpm_dev *ibmvtpm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) int rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) msleep(100);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) rc = plpar_hcall_norets(H_FREE_CRQ,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) ibmvtpm->vdev->unit_address);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) memset(ibmvtpm->crq_queue.crq_addr, 0, CRQ_RES_BUF_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) ibmvtpm->crq_queue.index = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) return plpar_hcall_norets(H_REG_CRQ, ibmvtpm->vdev->unit_address,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) ibmvtpm->crq_dma_handle, CRQ_RES_BUF_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) static bool tpm_ibmvtpm_req_canceled(struct tpm_chip *chip, u8 status)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) return (status == 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) static const struct tpm_class_ops tpm_ibmvtpm = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) .recv = tpm_ibmvtpm_recv,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) .send = tpm_ibmvtpm_send,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) .cancel = tpm_ibmvtpm_cancel,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) .status = tpm_ibmvtpm_status,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) .req_complete_mask = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) .req_complete_val = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) .req_canceled = tpm_ibmvtpm_req_canceled,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) static const struct dev_pm_ops tpm_ibmvtpm_pm_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) .suspend = tpm_ibmvtpm_suspend,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) .resume = tpm_ibmvtpm_resume,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) * ibmvtpm_crq_get_next - Get next responded crq
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) * @ibmvtpm: vtpm device struct
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) * Return: vtpm crq pointer or NULL.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) static struct ibmvtpm_crq *ibmvtpm_crq_get_next(struct ibmvtpm_dev *ibmvtpm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) struct ibmvtpm_crq_queue *crq_q = &ibmvtpm->crq_queue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) struct ibmvtpm_crq *crq = &crq_q->crq_addr[crq_q->index];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) if (crq->valid & VTPM_MSG_RES) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) if (++crq_q->index == crq_q->num_entry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) crq_q->index = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) smp_rmb();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) crq = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) return crq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) * ibmvtpm_crq_process - Process responded crq
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) * @crq: crq to be processed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) * @ibmvtpm: vtpm device struct
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) static void ibmvtpm_crq_process(struct ibmvtpm_crq *crq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) struct ibmvtpm_dev *ibmvtpm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) int rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) switch (crq->valid) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) case VALID_INIT_CRQ:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) switch (crq->msg) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) case INIT_CRQ_RES:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) dev_info(ibmvtpm->dev, "CRQ initialized\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) rc = ibmvtpm_crq_send_init_complete(ibmvtpm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) dev_err(ibmvtpm->dev, "Unable to send CRQ init complete rc=%d\n", rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) case INIT_CRQ_COMP_RES:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) dev_info(ibmvtpm->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) "CRQ initialization completed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) dev_err(ibmvtpm->dev, "Unknown crq message type: %d\n", crq->msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) case IBMVTPM_VALID_CMD:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) switch (crq->msg) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) case VTPM_GET_RTCE_BUFFER_SIZE_RES:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) if (be16_to_cpu(crq->len) <= 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) dev_err(ibmvtpm->dev, "Invalid rtce size\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) ibmvtpm->rtce_size = be16_to_cpu(crq->len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) ibmvtpm->rtce_buf = kmalloc(ibmvtpm->rtce_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) if (!ibmvtpm->rtce_buf) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) dev_err(ibmvtpm->dev, "Failed to allocate memory for rtce buffer\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) ibmvtpm->rtce_dma_handle = dma_map_single(ibmvtpm->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) ibmvtpm->rtce_buf, ibmvtpm->rtce_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) DMA_BIDIRECTIONAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) if (dma_mapping_error(ibmvtpm->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) ibmvtpm->rtce_dma_handle)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) kfree(ibmvtpm->rtce_buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) ibmvtpm->rtce_buf = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) dev_err(ibmvtpm->dev, "Failed to dma map rtce buffer\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) case VTPM_GET_VERSION_RES:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) ibmvtpm->vtpm_version = be32_to_cpu(crq->data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) case VTPM_TPM_COMMAND_RES:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) /* len of the data in rtce buffer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) ibmvtpm->res_len = be16_to_cpu(crq->len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) ibmvtpm->tpm_processing_cmd = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) wake_up_interruptible(&ibmvtpm->wq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) * ibmvtpm_interrupt - Interrupt handler
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) * @irq: irq number to handle
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) * @vtpm_instance: vtpm that received interrupt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) * Returns:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) * IRQ_HANDLED
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) **/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) static irqreturn_t ibmvtpm_interrupt(int irq, void *vtpm_instance)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) struct ibmvtpm_dev *ibmvtpm = (struct ibmvtpm_dev *) vtpm_instance;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) struct ibmvtpm_crq *crq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) /* while loop is needed for initial setup (get version and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) * get rtce_size). There should be only one tpm request at any
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) * given time.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) while ((crq = ibmvtpm_crq_get_next(ibmvtpm)) != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) ibmvtpm_crq_process(crq, ibmvtpm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) wake_up_interruptible(&ibmvtpm->crq_queue.wq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) crq->valid = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) smp_wmb();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) * tpm_ibmvtpm_probe - ibm vtpm initialize entry point
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) * @vio_dev: vio device struct
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) * @id: vio device id struct
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) * Return:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) * 0 on success.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) * Non-zero on failure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) static int tpm_ibmvtpm_probe(struct vio_dev *vio_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) const struct vio_device_id *id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) struct ibmvtpm_dev *ibmvtpm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) struct device *dev = &vio_dev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) struct ibmvtpm_crq_queue *crq_q;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) struct tpm_chip *chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) int rc = -ENOMEM, rc1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) chip = tpmm_chip_alloc(dev, &tpm_ibmvtpm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) if (IS_ERR(chip))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) return PTR_ERR(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) ibmvtpm = kzalloc(sizeof(struct ibmvtpm_dev), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) if (!ibmvtpm) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) dev_err(dev, "kzalloc for ibmvtpm failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) goto cleanup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) ibmvtpm->dev = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) ibmvtpm->vdev = vio_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) crq_q = &ibmvtpm->crq_queue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) crq_q->crq_addr = (struct ibmvtpm_crq *)get_zeroed_page(GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) if (!crq_q->crq_addr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) dev_err(dev, "Unable to allocate memory for crq_addr\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) goto cleanup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) crq_q->num_entry = CRQ_RES_BUF_SIZE / sizeof(*crq_q->crq_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) init_waitqueue_head(&crq_q->wq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) ibmvtpm->crq_dma_handle = dma_map_single(dev, crq_q->crq_addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) CRQ_RES_BUF_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) DMA_BIDIRECTIONAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) if (dma_mapping_error(dev, ibmvtpm->crq_dma_handle)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) dev_err(dev, "dma mapping failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) goto cleanup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) rc = plpar_hcall_norets(H_REG_CRQ, vio_dev->unit_address,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) ibmvtpm->crq_dma_handle, CRQ_RES_BUF_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) if (rc == H_RESOURCE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) rc = ibmvtpm_reset_crq(ibmvtpm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) dev_err(dev, "Unable to register CRQ rc=%d\n", rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) goto reg_crq_cleanup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) rc = request_irq(vio_dev->irq, ibmvtpm_interrupt, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) tpm_ibmvtpm_driver_name, ibmvtpm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) dev_err(dev, "Error %d register irq 0x%x\n", rc, vio_dev->irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) goto init_irq_cleanup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) rc = vio_enable_interrupts(vio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) dev_err(dev, "Error %d enabling interrupts\n", rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) goto init_irq_cleanup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) init_waitqueue_head(&ibmvtpm->wq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) crq_q->index = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) dev_set_drvdata(&chip->dev, ibmvtpm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) spin_lock_init(&ibmvtpm->rtce_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) rc = ibmvtpm_crq_send_init(ibmvtpm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) goto init_irq_cleanup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) rc = ibmvtpm_crq_get_version(ibmvtpm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) goto init_irq_cleanup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) rc = ibmvtpm_crq_get_rtce_size(ibmvtpm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) goto init_irq_cleanup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) if (!wait_event_timeout(ibmvtpm->crq_queue.wq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) ibmvtpm->rtce_buf != NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) HZ)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) dev_err(dev, "CRQ response timed out\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) goto init_irq_cleanup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) if (!strcmp(id->compat, "IBM,vtpm20"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) chip->flags |= TPM_CHIP_FLAG_TPM2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) rc = tpm_get_timeouts(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) goto init_irq_cleanup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) if (chip->flags & TPM_CHIP_FLAG_TPM2) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) rc = tpm2_get_cc_attrs_tbl(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) goto init_irq_cleanup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) return tpm_chip_register(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) init_irq_cleanup:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) rc1 = plpar_hcall_norets(H_FREE_CRQ, vio_dev->unit_address);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) } while (rc1 == H_BUSY || H_IS_LONG_BUSY(rc1));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) reg_crq_cleanup:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) dma_unmap_single(dev, ibmvtpm->crq_dma_handle, CRQ_RES_BUF_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) DMA_BIDIRECTIONAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) cleanup:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) if (ibmvtpm) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) if (crq_q->crq_addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) free_page((unsigned long)crq_q->crq_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) kfree(ibmvtpm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) static struct vio_driver ibmvtpm_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) .id_table = tpm_ibmvtpm_device_table,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) .probe = tpm_ibmvtpm_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) .remove = tpm_ibmvtpm_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) .get_desired_dma = tpm_ibmvtpm_get_desired_dma,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) .name = tpm_ibmvtpm_driver_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) .pm = &tpm_ibmvtpm_pm_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) * ibmvtpm_module_init - Initialize ibm vtpm module.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) * Return:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) * 0 on success.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) * Non-zero on failure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) static int __init ibmvtpm_module_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) return vio_register_driver(&ibmvtpm_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) * ibmvtpm_module_exit - Tear down ibm vtpm module.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) static void __exit ibmvtpm_module_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) vio_unregister_driver(&ibmvtpm_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) module_init(ibmvtpm_module_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) module_exit(ibmvtpm_module_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) MODULE_AUTHOR("adlai@us.ibm.com");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) MODULE_DESCRIPTION("IBM vTPM Driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) MODULE_VERSION("1.0");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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