diff options
Diffstat (limited to 'drivers/misc/mei/hw-me.c')
| -rw-r--r-- | drivers/misc/mei/hw-me.c | 77 |
1 files changed, 51 insertions, 26 deletions
diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c index 334ab02e1de2..0759c3a668de 100644 --- a/drivers/misc/mei/hw-me.c +++ b/drivers/misc/mei/hw-me.c @@ -19,6 +19,7 @@ #include <linux/kthread.h> #include <linux/interrupt.h> #include <linux/pm_runtime.h> +#include <linux/sizes.h> #include "mei_dev.h" #include "hbm.h" @@ -228,7 +229,7 @@ static void mei_me_hw_config(struct mei_device *dev) /* Doesn't change in runtime */ hcsr = mei_hcsr_read(dev); - dev->hbuf_depth = (hcsr & H_CBD) >> 24; + hw->hbuf_depth = (hcsr & H_CBD) >> 24; reg = 0; pci_read_config_dword(pdev, PCI_CFG_HFS_1, ®); @@ -490,70 +491,82 @@ static bool mei_me_hbuf_is_empty(struct mei_device *dev) */ static int mei_me_hbuf_empty_slots(struct mei_device *dev) { + struct mei_me_hw *hw = to_me_hw(dev); unsigned char filled_slots, empty_slots; filled_slots = mei_hbuf_filled_slots(dev); - empty_slots = dev->hbuf_depth - filled_slots; + empty_slots = hw->hbuf_depth - filled_slots; /* check for overflow */ - if (filled_slots > dev->hbuf_depth) + if (filled_slots > hw->hbuf_depth) return -EOVERFLOW; return empty_slots; } /** - * mei_me_hbuf_max_len - returns size of hw buffer. + * mei_me_hbuf_depth - returns depth of the hw buffer. * * @dev: the device structure * - * Return: size of hw buffer in bytes + * Return: size of hw buffer in slots */ -static size_t mei_me_hbuf_max_len(const struct mei_device *dev) +static u32 mei_me_hbuf_depth(const struct mei_device *dev) { - return dev->hbuf_depth * sizeof(u32) - sizeof(struct mei_msg_hdr); -} + struct mei_me_hw *hw = to_me_hw(dev); + return hw->hbuf_depth; +} /** * mei_me_hbuf_write - writes a message to host hw buffer. * * @dev: the device structure - * @header: mei HECI header of message - * @buf: message payload will be written + * @hdr: header of message + * @hdr_len: header length in bytes: must be multiplication of a slot (4bytes) + * @data: payload + * @data_len: payload length in bytes * - * Return: -EIO if write has failed + * Return: 0 if success, < 0 - otherwise. */ static int mei_me_hbuf_write(struct mei_device *dev, - struct mei_msg_hdr *header, - const unsigned char *buf) + const void *hdr, size_t hdr_len, + const void *data, size_t data_len) { unsigned long rem; - unsigned long length = header->length; - u32 *reg_buf = (u32 *)buf; + unsigned long i; + const u32 *reg_buf; u32 dw_cnt; - int i; int empty_slots; - dev_dbg(dev->dev, MEI_HDR_FMT, MEI_HDR_PRM(header)); + if (WARN_ON(!hdr || !data || hdr_len & 0x3)) + return -EINVAL; + + dev_dbg(dev->dev, MEI_HDR_FMT, MEI_HDR_PRM((struct mei_msg_hdr *)hdr)); empty_slots = mei_hbuf_empty_slots(dev); dev_dbg(dev->dev, "empty slots = %hu.\n", empty_slots); - dw_cnt = mei_data2slots(length); - if (empty_slots < 0 || dw_cnt > empty_slots) + if (empty_slots < 0) + return -EOVERFLOW; + + dw_cnt = mei_data2slots(hdr_len + data_len); + if (dw_cnt > (u32)empty_slots) return -EMSGSIZE; - mei_me_hcbww_write(dev, *((u32 *) header)); + reg_buf = hdr; + for (i = 0; i < hdr_len / MEI_SLOT_SIZE; i++) + mei_me_hcbww_write(dev, reg_buf[i]); - for (i = 0; i < length / 4; i++) + reg_buf = data; + for (i = 0; i < data_len / MEI_SLOT_SIZE; i++) mei_me_hcbww_write(dev, reg_buf[i]); - rem = length & 0x3; + rem = data_len & 0x3; if (rem > 0) { u32 reg = 0; - memcpy(®, &buf[length - rem], rem); + memcpy(®, (const u8 *)data + data_len - rem, rem); mei_me_hcbww_write(dev, reg); } @@ -601,11 +614,11 @@ static int mei_me_count_full_read_slots(struct mei_device *dev) * Return: always 0 */ static int mei_me_read_slots(struct mei_device *dev, unsigned char *buffer, - unsigned long buffer_length) + unsigned long buffer_length) { u32 *reg_buf = (u32 *)buffer; - for (; buffer_length >= sizeof(u32); buffer_length -= sizeof(u32)) + for (; buffer_length >= MEI_SLOT_SIZE; buffer_length -= MEI_SLOT_SIZE) *reg_buf++ = mei_me_mecbrw_read(dev); if (buffer_length > 0) { @@ -1314,7 +1327,7 @@ static const struct mei_hw_ops mei_me_hw_ops = { .hbuf_free_slots = mei_me_hbuf_empty_slots, .hbuf_is_ready = mei_me_hbuf_is_empty, - .hbuf_max_len = mei_me_hbuf_max_len, + .hbuf_depth = mei_me_hbuf_depth, .write = mei_me_hbuf_write, @@ -1377,6 +1390,11 @@ static bool mei_me_fw_type_sps(struct pci_dev *pdev) .fw_status.status[4] = PCI_CFG_HFS_5, \ .fw_status.status[5] = PCI_CFG_HFS_6 +#define MEI_CFG_DMA_128 \ + .dma_size[DMA_DSCR_HOST] = SZ_128K, \ + .dma_size[DMA_DSCR_DEVICE] = SZ_128K, \ + .dma_size[DMA_DSCR_CTRL] = PAGE_SIZE + /* ICH Legacy devices */ static const struct mei_cfg mei_me_ich_cfg = { MEI_CFG_ICH_HFS, @@ -1409,6 +1427,12 @@ static const struct mei_cfg mei_me_pch8_sps_cfg = { MEI_CFG_FW_SPS, }; +/* Cannon Lake and newer devices */ +static const struct mei_cfg mei_me_pch12_cfg = { + MEI_CFG_PCH8_HFS, + MEI_CFG_DMA_128, +}; + /* * mei_cfg_list - A list of platform platform specific configurations. * Note: has to be synchronized with enum mei_cfg_idx. @@ -1421,6 +1445,7 @@ static const struct mei_cfg *const mei_cfg_list[] = { [MEI_ME_PCH_CPT_PBG_CFG] = &mei_me_pch_cpt_pbg_cfg, [MEI_ME_PCH8_CFG] = &mei_me_pch8_cfg, [MEI_ME_PCH8_SPS_CFG] = &mei_me_pch8_sps_cfg, + [MEI_ME_PCH12_CFG] = &mei_me_pch12_cfg, }; const struct mei_cfg *mei_me_get_cfg(kernel_ulong_t idx) |