diff options
Diffstat (limited to 'drivers/misc/mic/host/mic_x100.c')
| -rw-r--r-- | drivers/misc/mic/host/mic_x100.c | 251 |
1 files changed, 251 insertions, 0 deletions
diff --git a/drivers/misc/mic/host/mic_x100.c b/drivers/misc/mic/host/mic_x100.c index b63731691c73..a12ae5c8844d 100644 --- a/drivers/misc/mic/host/mic_x100.c +++ b/drivers/misc/mic/host/mic_x100.c @@ -20,6 +20,9 @@ */ #include <linux/fs.h> #include <linux/pci.h> +#include <linux/sched.h> +#include <linux/firmware.h> +#include <linux/delay.h> #include "../common/mic_device.h" #include "mic_device.h" @@ -256,6 +259,248 @@ mic_x100_program_msi_to_src_map(struct mic_device *mdev, mic_mmio_write(mw, reg, mxar); } +/* + * mic_x100_reset_fw_ready - Reset Firmware ready status field. + * @mdev: pointer to mic_device instance + */ +static void mic_x100_reset_fw_ready(struct mic_device *mdev) +{ + mdev->ops->write_spad(mdev, MIC_X100_DOWNLOAD_INFO, 0); +} + +/* + * mic_x100_is_fw_ready - Check if firmware is ready. + * @mdev: pointer to mic_device instance + */ +static bool mic_x100_is_fw_ready(struct mic_device *mdev) +{ + u32 scratch2 = mdev->ops->read_spad(mdev, MIC_X100_DOWNLOAD_INFO); + return MIC_X100_SPAD2_DOWNLOAD_STATUS(scratch2) ? true : false; +} + +/** + * mic_x100_get_apic_id - Get bootstrap APIC ID. + * @mdev: pointer to mic_device instance + */ +static u32 mic_x100_get_apic_id(struct mic_device *mdev) +{ + u32 scratch2 = 0; + + scratch2 = mdev->ops->read_spad(mdev, MIC_X100_DOWNLOAD_INFO); + return MIC_X100_SPAD2_APIC_ID(scratch2); +} + +/** + * mic_x100_send_firmware_intr - Send an interrupt to the firmware on MIC. + * @mdev: pointer to mic_device instance + */ +static void mic_x100_send_firmware_intr(struct mic_device *mdev) +{ + u32 apicicr_low; + u64 apic_icr_offset = MIC_X100_SBOX_APICICR7; + int vector = MIC_X100_BSP_INTERRUPT_VECTOR; + struct mic_mw *mw = &mdev->mmio; + + /* + * For MIC we need to make sure we "hit" + * the send_icr bit (13). + */ + apicicr_low = (vector | (1 << 13)); + + mic_mmio_write(mw, mic_x100_get_apic_id(mdev), + MIC_X100_SBOX_BASE_ADDRESS + apic_icr_offset + 4); + + /* Ensure that the interrupt is ordered w.r.t. previous stores. */ + wmb(); + mic_mmio_write(mw, apicicr_low, + MIC_X100_SBOX_BASE_ADDRESS + apic_icr_offset); +} + +/** + * mic_x100_hw_reset - Reset the MIC device. + * @mdev: pointer to mic_device instance + */ +static void mic_x100_hw_reset(struct mic_device *mdev) +{ + u32 reset_reg; + u32 rgcr = MIC_X100_SBOX_BASE_ADDRESS + MIC_X100_SBOX_RGCR; + struct mic_mw *mw = &mdev->mmio; + + /* Ensure that the reset is ordered w.r.t. previous loads and stores */ + mb(); + /* Trigger reset */ + reset_reg = mic_mmio_read(mw, rgcr); + reset_reg |= 0x1; + mic_mmio_write(mw, reset_reg, rgcr); + /* + * It seems we really want to delay at least 1 second + * after touching reset to prevent a lot of problems. + */ + msleep(1000); +} + +/** + * mic_x100_load_command_line - Load command line to MIC. + * @mdev: pointer to mic_device instance + * @fw: the firmware image + * + * RETURNS: An appropriate -ERRNO error value on error, or zero for success. + */ +static int +mic_x100_load_command_line(struct mic_device *mdev, const struct firmware *fw) +{ + u32 len = 0; + u32 boot_mem; + char *buf; + void __iomem *cmd_line_va = mdev->aper.va + mdev->bootaddr + fw->size; +#define CMDLINE_SIZE 2048 + + boot_mem = mdev->aper.len >> 20; + buf = kzalloc(CMDLINE_SIZE, GFP_KERNEL); + if (!buf) { + dev_err(mdev->sdev->parent, + "%s %d allocation failed\n", __func__, __LINE__); + return -ENOMEM; + } + len += snprintf(buf, CMDLINE_SIZE - len, + " mem=%dM", boot_mem); + if (mdev->cmdline) + snprintf(buf + len, CMDLINE_SIZE - len, + " %s", mdev->cmdline); + memcpy_toio(cmd_line_va, buf, strlen(buf) + 1); + kfree(buf); + return 0; +} + +/** + * mic_x100_load_ramdisk - Load ramdisk to MIC. + * @mdev: pointer to mic_device instance + * + * RETURNS: An appropriate -ERRNO error value on error, or zero for success. + */ +static int +mic_x100_load_ramdisk(struct mic_device *mdev) +{ + const struct firmware *fw; + int rc; + struct boot_params __iomem *bp = mdev->aper.va + mdev->bootaddr; + + rc = request_firmware(&fw, + mdev->ramdisk, mdev->sdev->parent); + if (rc < 0) { + dev_err(mdev->sdev->parent, + "ramdisk request_firmware failed: %d %s\n", + rc, mdev->ramdisk); + goto error; + } + /* + * Typically the bootaddr for card OS is 64M + * so copy over the ramdisk @ 128M. + */ + memcpy_toio(mdev->aper.va + (mdev->bootaddr << 1), + fw->data, fw->size); + iowrite32(cpu_to_le32(mdev->bootaddr << 1), &bp->hdr.ramdisk_image); + iowrite32(cpu_to_le32(fw->size), &bp->hdr.ramdisk_size); + release_firmware(fw); +error: + return rc; +} + +/** + * mic_x100_get_boot_addr - Get MIC boot address. + * @mdev: pointer to mic_device instance + * + * This function is called during firmware load to determine + * the address at which the OS should be downloaded in card + * memory i.e. GDDR. + * RETURNS: An appropriate -ERRNO error value on error, or zero for success. + */ +static int +mic_x100_get_boot_addr(struct mic_device *mdev) +{ + u32 scratch2, boot_addr; + int rc = 0; + + scratch2 = mdev->ops->read_spad(mdev, MIC_X100_DOWNLOAD_INFO); + boot_addr = MIC_X100_SPAD2_DOWNLOAD_ADDR(scratch2); + dev_dbg(mdev->sdev->parent, "%s %d boot_addr 0x%x\n", + __func__, __LINE__, boot_addr); + if (boot_addr > (1 << 31)) { + dev_err(mdev->sdev->parent, + "incorrect bootaddr 0x%x\n", + boot_addr); + rc = -EINVAL; + goto error; + } + mdev->bootaddr = boot_addr; +error: + return rc; +} + +/** + * mic_x100_load_firmware - Load firmware to MIC. + * @mdev: pointer to mic_device instance + * @buf: buffer containing boot string including firmware/ramdisk path. + * + * RETURNS: An appropriate -ERRNO error value on error, or zero for success. + */ +static int +mic_x100_load_firmware(struct mic_device *mdev, const char *buf) +{ + int rc; + const struct firmware *fw; + + rc = mic_x100_get_boot_addr(mdev); + if (rc) + goto error; + /* load OS */ + rc = request_firmware(&fw, mdev->firmware, mdev->sdev->parent); + if (rc < 0) { + dev_err(mdev->sdev->parent, + "ramdisk request_firmware failed: %d %s\n", + rc, mdev->firmware); + goto error; + } + if (mdev->bootaddr > mdev->aper.len - fw->size) { + rc = -EINVAL; + dev_err(mdev->sdev->parent, "%s %d rc %d bootaddr 0x%x\n", + __func__, __LINE__, rc, mdev->bootaddr); + release_firmware(fw); + goto error; + } + memcpy_toio(mdev->aper.va + mdev->bootaddr, fw->data, fw->size); + mdev->ops->write_spad(mdev, MIC_X100_FW_SIZE, fw->size); + if (!strcmp(mdev->bootmode, "elf")) + goto done; + /* load command line */ + rc = mic_x100_load_command_line(mdev, fw); + if (rc) { + dev_err(mdev->sdev->parent, "%s %d rc %d\n", + __func__, __LINE__, rc); + goto error; + } + release_firmware(fw); + /* load ramdisk */ + if (mdev->ramdisk) + rc = mic_x100_load_ramdisk(mdev); +error: + dev_dbg(mdev->sdev->parent, "%s %d rc %d\n", + __func__, __LINE__, rc); +done: + return rc; +} + +/** + * mic_x100_get_postcode - Get postcode status from firmware. + * @mdev: pointer to mic_device instance + * + * RETURNS: postcode. + */ +static u32 mic_x100_get_postcode(struct mic_device *mdev) +{ + return mic_mmio_read(&mdev->mmio, MIC_X100_POSTCODE); +} + /** * mic_x100_smpt_set - Update an SMPT entry with a DMA address. * @mdev: pointer to mic_device instance @@ -311,6 +556,12 @@ struct mic_hw_ops mic_x100_ops = { .write_spad = mic_x100_write_spad, .send_intr = mic_x100_send_intr, .ack_interrupt = mic_x100_ack_interrupt, + .reset = mic_x100_hw_reset, + .reset_fw_ready = mic_x100_reset_fw_ready, + .is_fw_ready = mic_x100_is_fw_ready, + .send_firmware_intr = mic_x100_send_firmware_intr, + .load_mic_fw = mic_x100_load_firmware, + .get_postcode = mic_x100_get_postcode, }; struct mic_hw_intr_ops mic_x100_intr_ops = { |