From 0ca944b16fd6c0d25bee666206ada43f95024ce3 Mon Sep 17 00:00:00 2001 From: Arthur Heymans Date: Wed, 20 Nov 2019 19:51:06 +0100 Subject: security/tpm: Drop CAR_GLOBAL_MIGRATION support Change-Id: I1c09eda6164efb390de4626f52aafba59962f9c4 Signed-off-by: Arthur Heymans Reviewed-on: https://review.coreboot.org/c/coreboot/+/37029 Reviewed-by: HAOUAS Elyes Reviewed-by: Patrick Georgi Tested-by: build bot (Jenkins) --- src/drivers/i2c/tpm/cr50.c | 32 +++++++---------- src/drivers/i2c/tpm/tis.c | 41 ++++++++++------------ src/drivers/i2c/tpm/tis_atmel.c | 1 - src/drivers/i2c/tpm/tpm.c | 77 +++++++++++++++++++---------------------- 4 files changed, 66 insertions(+), 85 deletions(-) (limited to 'src/drivers/i2c/tpm') diff --git a/src/drivers/i2c/tpm/cr50.c b/src/drivers/i2c/tpm/cr50.c index f9a286241e..f386dacb0b 100644 --- a/src/drivers/i2c/tpm/cr50.c +++ b/src/drivers/i2c/tpm/cr50.c @@ -27,7 +27,6 @@ * instead of just reading header and determining the remainder */ -#include #include #include #include @@ -55,15 +54,15 @@ struct tpm_inf_dev { uint8_t buf[CR50_MAX_BUFSIZE + sizeof(uint8_t)]; }; -static struct tpm_inf_dev g_tpm_dev CAR_GLOBAL; +static struct tpm_inf_dev g_tpm_dev; __weak int tis_plat_irq_status(void) { - static int warning_displayed CAR_GLOBAL; + static int warning_displayed; - if (!car_get_var(warning_displayed)) { + if (!warning_displayed) { printk(BIOS_WARNING, "WARNING: tis_plat_irq_status() not implemented, wasting 20ms to wait on Cr50!\n"); - car_set_var(warning_displayed, 1); + warning_displayed = 1; } mdelay(CR50_TIMEOUT_NOIRQ_MS); @@ -102,16 +101,14 @@ static int cr50_i2c_wait_tpm_ready(struct tpm_chip *chip) static int cr50_i2c_read(struct tpm_chip *chip, uint8_t addr, uint8_t *buffer, size_t len) { - struct tpm_inf_dev *tpm_dev = car_get_var_ptr(&g_tpm_dev); - - if (tpm_dev->addr == 0) + if (g_tpm_dev.addr == 0) return -1; /* Clear interrupt before starting transaction */ tis_plat_irq_status(); /* Send the register address byte to the TPM */ - if (i2c_write_raw(tpm_dev->bus, tpm_dev->addr, &addr, 1)) { + if (i2c_write_raw(g_tpm_dev.bus, g_tpm_dev.addr, &addr, 1)) { printk(BIOS_ERR, "%s: Address write failed\n", __func__); return -1; } @@ -121,7 +118,7 @@ static int cr50_i2c_read(struct tpm_chip *chip, uint8_t addr, return -1; /* Read response data from the TPM */ - if (i2c_read_raw(tpm_dev->bus, tpm_dev->addr, buffer, len)) { + if (i2c_read_raw(g_tpm_dev.bus, g_tpm_dev.addr, buffer, len)) { printk(BIOS_ERR, "%s: Read response failed\n", __func__); return -1; } @@ -146,22 +143,20 @@ static int cr50_i2c_read(struct tpm_chip *chip, uint8_t addr, static int cr50_i2c_write(struct tpm_chip *chip, uint8_t addr, uint8_t *buffer, size_t len) { - struct tpm_inf_dev *tpm_dev = car_get_var_ptr(&g_tpm_dev); - - if (tpm_dev->addr == 0) + if (g_tpm_dev.addr == 0) return -1; if (len > CR50_MAX_BUFSIZE) return -1; /* Prepend the 'register address' to the buffer */ - tpm_dev->buf[0] = addr; - memcpy(tpm_dev->buf + 1, buffer, len); + g_tpm_dev.buf[0] = addr; + memcpy(g_tpm_dev.buf + 1, buffer, len); /* Clear interrupt before starting transaction */ tis_plat_irq_status(); /* Send write request buffer with address */ - if (i2c_write_raw(tpm_dev->bus, tpm_dev->addr, tpm_dev->buf, len + 1)) { + if (i2c_write_raw(g_tpm_dev.bus, g_tpm_dev.addr, g_tpm_dev.buf, len + 1)) { printk(BIOS_ERR, "%s: Error writing to TPM\n", __func__); return -1; } @@ -492,7 +487,6 @@ static int cr50_i2c_probe(struct tpm_chip *chip, uint32_t *did_vid) int tpm_vendor_init(struct tpm_chip *chip, unsigned int bus, uint32_t dev_addr) { - struct tpm_inf_dev *tpm_dev = car_get_var_ptr(&g_tpm_dev); uint32_t did_vid = 0; if (dev_addr == 0) { @@ -500,8 +494,8 @@ int tpm_vendor_init(struct tpm_chip *chip, unsigned int bus, uint32_t dev_addr) return -1; } - tpm_dev->bus = bus; - tpm_dev->addr = dev_addr; + g_tpm_dev.bus = bus; + g_tpm_dev.addr = dev_addr; cr50_vendor_init(chip); diff --git a/src/drivers/i2c/tpm/tis.c b/src/drivers/i2c/tpm/tis.c index e466c45c9f..d791a56af5 100644 --- a/src/drivers/i2c/tpm/tis.c +++ b/src/drivers/i2c/tpm/tis.c @@ -12,7 +12,6 @@ * GNU General Public License for more details. */ -#include #include #include #include @@ -27,25 +26,24 @@ #include "tpm.h" /* global structure for tpm chip data */ -static struct tpm_chip g_chip CAR_GLOBAL; +static struct tpm_chip g_chip; #define TPM_CMD_COUNT_BYTE 2 #define TPM_CMD_ORDINAL_BYTE 6 int tis_open(void) { - struct tpm_chip *chip = car_get_var_ptr(&g_chip); int rc; - if (chip->is_open) { + if (g_chip.is_open) { printk(BIOS_DEBUG, "tis_open() called twice.\n"); return -1; } - rc = tpm_vendor_init(chip, CONFIG_DRIVER_TPM_I2C_BUS, + rc = tpm_vendor_init(&g_chip, CONFIG_DRIVER_TPM_I2C_BUS, CONFIG_DRIVER_TPM_I2C_ADDR); if (rc < 0) - chip->is_open = 0; + g_chip.is_open = 0; if (rc) return -1; @@ -55,11 +53,9 @@ int tis_open(void) int tis_close(void) { - struct tpm_chip *chip = car_get_var_ptr(&g_chip); - - if (chip->is_open) { - tpm_vendor_cleanup(chip); - chip->is_open = 0; + if (g_chip.is_open) { + tpm_vendor_cleanup(&g_chip); + g_chip.is_open = 0; } return 0; @@ -76,12 +72,11 @@ static ssize_t tpm_transmit(const uint8_t *sbuf, size_t sbufsiz, void *rbuf, { int rc; uint32_t count; - struct tpm_chip *chip = car_get_var_ptr(&g_chip); memcpy(&count, sbuf + TPM_CMD_COUNT_BYTE, sizeof(count)); count = be32_to_cpu(count); - if (!chip->vendor.send || !chip->vendor.status || !chip->vendor.cancel) + if (!g_chip.vendor.send || !g_chip.vendor.status || !g_chip.vendor.cancel) return -1; if (count == 0) { @@ -94,8 +89,8 @@ static ssize_t tpm_transmit(const uint8_t *sbuf, size_t sbufsiz, void *rbuf, return -1; } - ASSERT(chip->vendor.send); - rc = chip->vendor.send(chip, (uint8_t *) sbuf, count); + ASSERT(g_chip.vendor.send); + rc = g_chip.vendor.send(&g_chip, (uint8_t *) sbuf, count); if (rc < 0) { printk(BIOS_DEBUG, "tpm_transmit: tpm_send error\n"); goto out; @@ -103,14 +98,14 @@ static ssize_t tpm_transmit(const uint8_t *sbuf, size_t sbufsiz, void *rbuf, int timeout = 2 * 60 * 1000; /* two minutes timeout */ while (timeout) { - ASSERT(chip->vendor.status); - uint8_t status = chip->vendor.status(chip); - if ((status & chip->vendor.req_complete_mask) == - chip->vendor.req_complete_val) { + ASSERT(g_chip.vendor.status); + uint8_t status = g_chip.vendor.status(&g_chip); + if ((status & g_chip.vendor.req_complete_mask) == + g_chip.vendor.req_complete_val) { goto out_recv; } - if (status == chip->vendor.req_canceled) { + if (status == g_chip.vendor.req_canceled) { printk(BIOS_DEBUG, "tpm_transmit: Operation Canceled\n"); rc = -1; @@ -120,15 +115,15 @@ static ssize_t tpm_transmit(const uint8_t *sbuf, size_t sbufsiz, void *rbuf, timeout--; } - ASSERT(chip->vendor.cancel); - chip->vendor.cancel(chip); + ASSERT(g_chip.vendor.cancel); + g_chip.vendor.cancel(&g_chip); printk(BIOS_DEBUG, "tpm_transmit: Operation Timed out\n"); rc = -1; //ETIME; goto out; out_recv: - rc = chip->vendor.recv(chip, (uint8_t *) rbuf, rbufsiz); + rc = g_chip.vendor.recv(&g_chip, (uint8_t *) rbuf, rbufsiz); if (rc < 0) printk(BIOS_DEBUG, "tpm_transmit: tpm_recv: error %d\n", rc); out: diff --git a/src/drivers/i2c/tpm/tis_atmel.c b/src/drivers/i2c/tpm/tis_atmel.c index 42df292615..793418a96a 100644 --- a/src/drivers/i2c/tpm/tis_atmel.c +++ b/src/drivers/i2c/tpm/tis_atmel.c @@ -12,7 +12,6 @@ * GNU General Public License for more details. */ -#include #include #include #include diff --git a/src/drivers/i2c/tpm/tpm.c b/src/drivers/i2c/tpm/tpm.c index e0950849fc..71641d0edc 100644 --- a/src/drivers/i2c/tpm/tpm.c +++ b/src/drivers/i2c/tpm/tpm.c @@ -28,7 +28,6 @@ */ -#include #include #include #include @@ -81,7 +80,7 @@ struct tpm_inf_dev { enum i2c_chip_type chip_type; }; -static struct tpm_inf_dev g_tpm_dev CAR_GLOBAL; +static struct tpm_inf_dev g_tpm_dev; /* * iic_tpm_read() - read from TPM register @@ -99,24 +98,23 @@ static struct tpm_inf_dev g_tpm_dev CAR_GLOBAL; */ static int iic_tpm_read(uint8_t addr, uint8_t *buffer, size_t len) { - struct tpm_inf_dev *tpm_dev = car_get_var_ptr(&g_tpm_dev); int rc; int count; - if (tpm_dev->addr == 0) + if (g_tpm_dev.addr == 0) return -1; - switch (tpm_dev->chip_type) { + switch (g_tpm_dev.chip_type) { case SLB9635: case UNKNOWN: /* slb9635 protocol should work in both cases */ for (count = 0; count < MAX_COUNT; count++) { - rc = i2c_write_raw(tpm_dev->bus, tpm_dev->addr, + rc = i2c_write_raw(g_tpm_dev.bus, g_tpm_dev.addr, &addr, 1); if (rc == 0) break; /* success, break to skip sleep */ - udelay(tpm_dev->sleep_short); + udelay(g_tpm_dev.sleep_short); } if (rc) @@ -127,8 +125,8 @@ static int iic_tpm_read(uint8_t addr, uint8_t *buffer, size_t len) * retrieving the data */ for (count = 0; count < MAX_COUNT; count++) { - udelay(tpm_dev->sleep_short); - rc = i2c_read_raw(tpm_dev->bus, tpm_dev->addr, + udelay(g_tpm_dev.sleep_short); + rc = i2c_read_raw(g_tpm_dev.bus, g_tpm_dev.addr, buffer, len); if (rc == 0) break; /* success, break to skip sleep */ @@ -144,23 +142,23 @@ static int iic_tpm_read(uint8_t addr, uint8_t *buffer, size_t len) * retries should usually not be needed, but are kept just to * be safe on the safe side. */ - struct i2c_msg aseg = { .flags = 0, .slave = tpm_dev->addr, + struct i2c_msg aseg = { .flags = 0, .slave = g_tpm_dev.addr, .buf = &addr, .len = 1 }; struct i2c_msg dseg = { .flags = I2C_M_RD, - .slave = tpm_dev->addr, + .slave = g_tpm_dev.addr, .buf = buffer, .len = len }; for (count = 0; count < MAX_COUNT; count++) { - rc = i2c_transfer(tpm_dev->bus, &aseg, 1) || - i2c_transfer(tpm_dev->bus, &dseg, 1); + rc = i2c_transfer(g_tpm_dev.bus, &aseg, 1) || + i2c_transfer(g_tpm_dev.bus, &dseg, 1); if (rc == 0) break; /* break here to skip sleep */ - udelay(tpm_dev->sleep_short); + udelay(g_tpm_dev.sleep_short); } } } /* take care of 'guard time' */ - udelay(tpm_dev->sleep_short); + udelay(g_tpm_dev.sleep_short); if (rc) return -1; @@ -171,7 +169,6 @@ static int iic_tpm_write_generic(uint8_t addr, uint8_t *buffer, size_t len, unsigned int sleep_time, uint8_t max_count) { - struct tpm_inf_dev *tpm_dev = car_get_var_ptr(&g_tpm_dev); int rc = 0; int count; @@ -182,14 +179,14 @@ static int iic_tpm_write_generic(uint8_t addr, uint8_t *buffer, size_t len, } /* prepare send buffer */ - tpm_dev->buf[0] = addr; - memcpy(&(tpm_dev->buf[1]), buffer, len); + g_tpm_dev.buf[0] = addr; + memcpy(&(g_tpm_dev.buf[1]), buffer, len); - if (tpm_dev->addr == 0) + if (g_tpm_dev.addr == 0) return -1; for (count = 0; count < max_count; count++) { - rc = i2c_write_raw(tpm_dev->bus, tpm_dev->addr, - tpm_dev->buf, len + 1); + rc = i2c_write_raw(g_tpm_dev.bus, g_tpm_dev.addr, + g_tpm_dev.buf, len + 1); if (rc == 0) break; /* success, break to skip sleep */ @@ -197,7 +194,7 @@ static int iic_tpm_write_generic(uint8_t addr, uint8_t *buffer, size_t len, } /* take care of 'guard time' */ - udelay(tpm_dev->sleep_short); + udelay(g_tpm_dev.sleep_short); if (rc) return -1; @@ -222,8 +219,7 @@ static int iic_tpm_write_generic(uint8_t addr, uint8_t *buffer, size_t len, */ static int iic_tpm_write(uint8_t addr, uint8_t *buffer, size_t len) { - struct tpm_inf_dev *tpm_dev = car_get_var_ptr(&g_tpm_dev); - return iic_tpm_write_generic(addr, buffer, len, tpm_dev->sleep_short, + return iic_tpm_write_generic(addr, buffer, len, g_tpm_dev.sleep_short, MAX_COUNT); } @@ -233,8 +229,7 @@ static int iic_tpm_write(uint8_t addr, uint8_t *buffer, size_t len) * */ static int iic_tpm_write_long(uint8_t addr, uint8_t *buffer, size_t len) { - struct tpm_inf_dev *tpm_dev = car_get_var_ptr(&g_tpm_dev); - return iic_tpm_write_generic(addr, buffer, len, tpm_dev->sleep_long, + return iic_tpm_write_generic(addr, buffer, len, g_tpm_dev.sleep_long, MAX_COUNT_LONG); } @@ -479,17 +474,16 @@ out_err: int tpm_vendor_probe(unsigned int bus, uint32_t addr) { - struct tpm_inf_dev *tpm_dev = car_get_var_ptr(&g_tpm_dev); struct stopwatch sw; uint8_t buf = 0; int ret; long sw_run_duration = SLEEP_DURATION_PROBE_MS; - tpm_dev->chip_type = UNKNOWN; - tpm_dev->bus = bus; - tpm_dev->addr = addr; - tpm_dev->sleep_short = SLEEP_DURATION; - tpm_dev->sleep_long = SLEEP_DURATION_LONG; + g_tpm_dev.chip_type = UNKNOWN; + g_tpm_dev.bus = bus; + g_tpm_dev.addr = addr; + g_tpm_dev.sleep_short = SLEEP_DURATION; + g_tpm_dev.sleep_long = SLEEP_DURATION_LONG; /* * Probe TPM. Check if the TPM_ACCESS register's ValidSts bit is set(1) @@ -521,7 +515,6 @@ int tpm_vendor_probe(unsigned int bus, uint32_t addr) int tpm_vendor_init(struct tpm_chip *chip, unsigned int bus, uint32_t dev_addr) { - struct tpm_inf_dev *tpm_dev = car_get_var_ptr(&g_tpm_dev); uint32_t vendor; if (dev_addr == 0) { @@ -529,11 +522,11 @@ int tpm_vendor_init(struct tpm_chip *chip, unsigned int bus, uint32_t dev_addr) return -1; } - tpm_dev->chip_type = UNKNOWN; - tpm_dev->bus = bus; - tpm_dev->addr = dev_addr; - tpm_dev->sleep_short = SLEEP_DURATION; - tpm_dev->sleep_long = SLEEP_DURATION_LONG; + g_tpm_dev.chip_type = UNKNOWN; + g_tpm_dev.bus = bus; + g_tpm_dev.addr = dev_addr; + g_tpm_dev.sleep_short = SLEEP_DURATION; + g_tpm_dev.sleep_long = SLEEP_DURATION_LONG; memset(&chip->vendor, 0, sizeof(struct tpm_vendor_specific)); chip->is_open = 1; @@ -554,9 +547,9 @@ int tpm_vendor_init(struct tpm_chip *chip, unsigned int bus, uint32_t dev_addr) goto out_err; if (vendor == TPM_TIS_I2C_DID_VID_9645) { - tpm_dev->chip_type = SLB9645; + g_tpm_dev.chip_type = SLB9645; } else if (be32_to_cpu(vendor) == TPM_TIS_I2C_DID_VID_9635) { - tpm_dev->chip_type = SLB9635; + g_tpm_dev.chip_type = SLB9635; } else { printk(BIOS_DEBUG, "Vendor ID 0x%08x not recognized.\n", vendor); @@ -564,8 +557,8 @@ int tpm_vendor_init(struct tpm_chip *chip, unsigned int bus, uint32_t dev_addr) } printk(BIOS_DEBUG, "I2C TPM %u:%02x (chip type %s device-id 0x%X)\n", - tpm_dev->bus, tpm_dev->addr, - chip_name[tpm_dev->chip_type], vendor >> 16); + g_tpm_dev.bus, g_tpm_dev.addr, + chip_name[g_tpm_dev.chip_type], vendor >> 16); /* * A timeout query to TPM can be placed here. -- cgit v1.2.3