1 files changed, 0 insertions, 409 deletions
diff --git a/drivers/misc/habanalabs/pci.c b/drivers/misc/habanalabs/pci.c
deleted file mode 100644
index 9f634ef6f5b3..000000000000
--- a/drivers/misc/habanalabs/pci.c
+++ /dev/null
@@ -1,409 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-
-/*
- * Copyright 2016-2019 HabanaLabs, Ltd.
- * All Rights Reserved.
- */
-
-#include "habanalabs.h"
-#include "include/hw_ip/pci/pci_general.h"
-
-#include <linux/pci.h>
-
-#define HL_PLDM_PCI_ELBI_TIMEOUT_MSEC	(HL_PCI_ELBI_TIMEOUT_MSEC * 10)
-
-/**
- * hl_pci_bars_map() - Map PCI BARs.
- * @hdev: Pointer to hl_device structure.
- * @bar_name: Array of BAR names.
- * @is_wc: Array with flag per BAR whether a write-combined mapping is needed.
- *
- * Request PCI regions and map them to kernel virtual addresses.
- *
- * Return: 0 on success, non-zero for failure.
- */
-int hl_pci_bars_map(struct hl_device *hdev, const char * const name[3],
-			bool is_wc[3])
-{
-	struct pci_dev *pdev = hdev->pdev;
-	int rc, i, bar;
-
-	rc = pci_request_regions(pdev, HL_NAME);
-	if (rc) {
-		dev_err(hdev->dev, "Cannot obtain PCI resources\n");
-		return rc;
-	}
-
-	for (i = 0 ; i < 3 ; i++) {
-		bar = i * 2; /* 64-bit BARs */
-		hdev->pcie_bar[bar] = is_wc[i] ?
-				pci_ioremap_wc_bar(pdev, bar) :
-				pci_ioremap_bar(pdev, bar);
-		if (!hdev->pcie_bar[bar]) {
-			dev_err(hdev->dev, "pci_ioremap%s_bar failed for %s\n",
-					is_wc[i] ? "_wc" : "", name[i]);
-			rc = -ENODEV;
-			goto err;
-		}
-	}
-
-	return 0;
-
-err:
-	for (i = 2 ; i >= 0 ; i--) {
-		bar = i * 2; /* 64-bit BARs */
-		if (hdev->pcie_bar[bar])
-			iounmap(hdev->pcie_bar[bar]);
-	}
-
-	pci_release_regions(pdev);
-
-	return rc;
-}
-
-/*
- * hl_pci_bars_unmap() - Unmap PCI BARS.
- * @hdev: Pointer to hl_device structure.
- *
- * Release all PCI BARs and unmap their virtual addresses.
- */
-static void hl_pci_bars_unmap(struct hl_device *hdev)
-{
-	struct pci_dev *pdev = hdev->pdev;
-	int i, bar;
-
-	for (i = 2 ; i >= 0 ; i--) {
-		bar = i * 2; /* 64-bit BARs */
-		iounmap(hdev->pcie_bar[bar]);
-	}
-
-	pci_release_regions(pdev);
-}
-
-/*
- * hl_pci_elbi_write() - Write through the ELBI interface.
- * @hdev: Pointer to hl_device structure.
- *
- * Return: 0 on success, negative value for failure.
- */
-static int hl_pci_elbi_write(struct hl_device *hdev, u64 addr, u32 data)
-{
-	struct pci_dev *pdev = hdev->pdev;
-	ktime_t timeout;
-	u64 msec;
-	u32 val;
-
-	if (hdev->pldm)
-		msec = HL_PLDM_PCI_ELBI_TIMEOUT_MSEC;
-	else
-		msec = HL_PCI_ELBI_TIMEOUT_MSEC;
-
-	/* Clear previous status */
-	pci_write_config_dword(pdev, mmPCI_CONFIG_ELBI_STS, 0);
-
-	pci_write_config_dword(pdev, mmPCI_CONFIG_ELBI_ADDR, (u32) addr);
-	pci_write_config_dword(pdev, mmPCI_CONFIG_ELBI_DATA, data);
-	pci_write_config_dword(pdev, mmPCI_CONFIG_ELBI_CTRL,
-				PCI_CONFIG_ELBI_CTRL_WRITE);
-
-	timeout = ktime_add_ms(ktime_get(), msec);
-	for (;;) {
-		pci_read_config_dword(pdev, mmPCI_CONFIG_ELBI_STS, &val);
-		if (val & PCI_CONFIG_ELBI_STS_MASK)
-			break;
-		if (ktime_compare(ktime_get(), timeout) > 0) {
-			pci_read_config_dword(pdev, mmPCI_CONFIG_ELBI_STS,
-						&val);
-			break;
-		}
-
-		usleep_range(300, 500);
-	}
-
-	if ((val & PCI_CONFIG_ELBI_STS_MASK) == PCI_CONFIG_ELBI_STS_DONE)
-		return 0;
-
-	if (val & PCI_CONFIG_ELBI_STS_ERR) {
-		dev_err(hdev->dev, "Error writing to ELBI\n");
-		return -EIO;
-	}
-
-	if (!(val & PCI_CONFIG_ELBI_STS_MASK)) {
-		dev_err(hdev->dev, "ELBI write didn't finish in time\n");
-		return -EIO;
-	}
-
-	dev_err(hdev->dev, "ELBI write has undefined bits in status\n");
-	return -EIO;
-}
-
-/**
- * hl_pci_iatu_write() - iatu write routine.
- * @hdev: Pointer to hl_device structure.
- *
- * Return: 0 on success, negative value for failure.
- */
-int hl_pci_iatu_write(struct hl_device *hdev, u32 addr, u32 data)
-{
-	struct asic_fixed_properties *prop = &hdev->asic_prop;
-	u32 dbi_offset;
-	int rc;
-
-	dbi_offset = addr & 0xFFF;
-
-	rc = hl_pci_elbi_write(hdev, prop->pcie_aux_dbi_reg_addr, 0x00300000);
-	rc |= hl_pci_elbi_write(hdev, prop->pcie_dbi_base_address + dbi_offset,
-				data);
-
-	if (rc)
-		return -EIO;
-
-	return 0;
-}
-
-/*
- * hl_pci_reset_link_through_bridge() - Reset PCI link.
- * @hdev: Pointer to hl_device structure.
- */
-static void hl_pci_reset_link_through_bridge(struct hl_device *hdev)
-{
-	struct pci_dev *pdev = hdev->pdev;
-	struct pci_dev *parent_port;
-	u16 val;
-
-	parent_port = pdev->bus->self;
-	pci_read_config_word(parent_port, PCI_BRIDGE_CONTROL, &val);
-	val |= PCI_BRIDGE_CTL_BUS_RESET;
-	pci_write_config_word(parent_port, PCI_BRIDGE_CONTROL, val);
-	ssleep(1);
-
-	val &= ~(PCI_BRIDGE_CTL_BUS_RESET);
-	pci_write_config_word(parent_port, PCI_BRIDGE_CONTROL, val);
-	ssleep(3);
-}
-
-/**
- * hl_pci_set_dram_bar_base() - Set DDR BAR to map specific device address.
- * @hdev: Pointer to hl_device structure.
- * @inbound_region: Inbound region number.
- * @bar: PCI BAR number.
- * @addr: Address in DRAM. Must be aligned to DRAM bar size.
- *
- * Configure the iATU so that the DRAM bar will start at the specified address.
- *
- * Return: 0 on success, negative value for failure.
- */
-int hl_pci_set_dram_bar_base(struct hl_device *hdev, u8 inbound_region, u8 bar,
-				u64 addr)
-{
-	struct asic_fixed_properties *prop = &hdev->asic_prop;
-	u32 offset;
-	int rc;
-
-	switch (inbound_region) {
-	case 0:
-		offset = 0x100;
-		break;
-	case 1:
-		offset = 0x300;
-		break;
-	case 2:
-		offset = 0x500;
-		break;
-	default:
-		dev_err(hdev->dev, "Invalid inbound region %d\n",
-			inbound_region);
-		return -EINVAL;
-	}
-
-	if (bar != 0 && bar != 2 && bar != 4) {
-		dev_err(hdev->dev, "Invalid PCI BAR %d\n", bar);
-		return -EINVAL;
-	}
-
-	/* Point to the specified address */
-	rc = hl_pci_iatu_write(hdev, offset + 0x14, lower_32_bits(addr));
-	rc |= hl_pci_iatu_write(hdev, offset + 0x18, upper_32_bits(addr));
-	rc |= hl_pci_iatu_write(hdev, offset + 0x0, 0);
-	/* Enable + BAR match + match enable + BAR number */
-	rc |= hl_pci_iatu_write(hdev, offset + 0x4, 0xC0080000 | (bar << 8));
-
-	/* Return the DBI window to the default location */
-	rc |= hl_pci_elbi_write(hdev, prop->pcie_aux_dbi_reg_addr, 0);
-	rc |= hl_pci_elbi_write(hdev, prop->pcie_aux_dbi_reg_addr + 4, 0);
-
-	if (rc)
-		dev_err(hdev->dev, "failed to map DRAM bar to 0x%08llx\n",
-			addr);
-
-	return rc;
-}
-
-/**
- * hl_pci_init_iatu() - Initialize the iATU unit inside the PCI controller.
- * @hdev: Pointer to hl_device structure.
- * @sram_base_address: SRAM base address.
- * @dram_base_address: DRAM base address.
- * @host_phys_base_address: Base physical address of host memory for device
- *                          transactions.
- * @host_phys_size: Size of host memory for device transactions.
- *
- * This is needed in case the firmware doesn't initialize the iATU.
- *
- * Return: 0 on success, negative value for failure.
- */
-int hl_pci_init_iatu(struct hl_device *hdev, u64 sram_base_address,
-			u64 dram_base_address, u64 host_phys_base_address,
-			u64 host_phys_size)
-{
-	struct asic_fixed_properties *prop = &hdev->asic_prop;
-	u64 host_phys_end_addr;
-	int rc = 0;
-
-	/* Inbound Region 0 - Bar 0 - Point to SRAM base address */
-	rc  = hl_pci_iatu_write(hdev, 0x114, lower_32_bits(sram_base_address));
-	rc |= hl_pci_iatu_write(hdev, 0x118, upper_32_bits(sram_base_address));
-	rc |= hl_pci_iatu_write(hdev, 0x100, 0);
-	/* Enable + Bar match + match enable */
-	rc |= hl_pci_iatu_write(hdev, 0x104, 0xC0080000);
-
-	/* Return the DBI window to the default location */
-	rc |= hl_pci_elbi_write(hdev, prop->pcie_aux_dbi_reg_addr, 0);
-	rc |= hl_pci_elbi_write(hdev, prop->pcie_aux_dbi_reg_addr + 4, 0);
-
-	hdev->asic_funcs->set_dma_mask_from_fw(hdev);
-
-	/* Point to DRAM */
-	if (!hdev->asic_funcs->set_dram_bar_base)
-		return -EINVAL;
-	if (hdev->asic_funcs->set_dram_bar_base(hdev, dram_base_address) ==
-								U64_MAX)
-		return -EIO;
-
-	/* Outbound Region 0 - Point to Host */
-	host_phys_end_addr = host_phys_base_address + host_phys_size - 1;
-	rc |= hl_pci_iatu_write(hdev, 0x008,
-				lower_32_bits(host_phys_base_address));
-	rc |= hl_pci_iatu_write(hdev, 0x00C,
-				upper_32_bits(host_phys_base_address));
-	rc |= hl_pci_iatu_write(hdev, 0x010, lower_32_bits(host_phys_end_addr));
-	rc |= hl_pci_iatu_write(hdev, 0x014, 0);
-
-	if ((hdev->power9_64bit_dma_enable) && (hdev->dma_mask == 64))
-		rc |= hl_pci_iatu_write(hdev, 0x018, 0x08000000);
-	else
-		rc |= hl_pci_iatu_write(hdev, 0x018, 0);
-
-	rc |= hl_pci_iatu_write(hdev, 0x020, upper_32_bits(host_phys_end_addr));
-	/* Increase region size */
-	rc |= hl_pci_iatu_write(hdev, 0x000, 0x00002000);
-	/* Enable */
-	rc |= hl_pci_iatu_write(hdev, 0x004, 0x80000000);
-
-	/* Return the DBI window to the default location */
-	rc |= hl_pci_elbi_write(hdev, prop->pcie_aux_dbi_reg_addr, 0);
-	rc |= hl_pci_elbi_write(hdev, prop->pcie_aux_dbi_reg_addr + 4, 0);
-
-	if (rc)
-		return -EIO;
-
-	return 0;
-}
-
-/**
- * hl_pci_set_dma_mask() - Set DMA masks for the device.
- * @hdev: Pointer to hl_device structure.
- * @dma_mask: number of bits for the requested dma mask.
- *
- * This function sets the DMA masks (regular and consistent) for a specified
- * value. If it doesn't succeed, it tries to set it to a fall-back value
- *
- * Return: 0 on success, non-zero for failure.
- */
-static int hl_pci_set_dma_mask(struct hl_device *hdev)
-{
-	struct pci_dev *pdev = hdev->pdev;
-	int rc;
-
-	/* set DMA mask */
-	rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(hdev->dma_mask));
-	if (rc) {
-		dev_err(hdev->dev,
-			"Failed to set pci dma mask to %d bits, error %d\n",
-			hdev->dma_mask, rc);
-		return rc;
-	}
-
-	rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(hdev->dma_mask));
-	if (rc) {
-		dev_err(hdev->dev,
-			"Failed to set pci consistent dma mask to %d bits, error %d\n",
-			hdev->dma_mask, rc);
-		return rc;
-	}
-
-	return 0;
-}
-
-/**
- * hl_pci_init() - PCI initialization code.
- * @hdev: Pointer to hl_device structure.
- *
- * Set DMA masks, initialize the PCI controller and map the PCI BARs.
- *
- * Return: 0 on success, non-zero for failure.
- */
-int hl_pci_init(struct hl_device *hdev)
-{
-	struct pci_dev *pdev = hdev->pdev;
-	int rc;
-
-	if (hdev->reset_pcilink)
-		hl_pci_reset_link_through_bridge(hdev);
-
-	rc = pci_enable_device_mem(pdev);
-	if (rc) {
-		dev_err(hdev->dev, "can't enable PCI device\n");
-		return rc;
-	}
-
-	pci_set_master(pdev);
-
-	rc = hdev->asic_funcs->pci_bars_map(hdev);
-	if (rc) {
-		dev_err(hdev->dev, "Failed to initialize PCI BARs\n");
-		goto disable_device;
-	}
-
-	rc = hdev->asic_funcs->init_iatu(hdev);
-	if (rc) {
-		dev_err(hdev->dev, "Failed to initialize iATU\n");
-		goto disable_device;
-	}
-
-	rc = hl_pci_set_dma_mask(hdev);
-	if (rc)
-		goto disable_device;
-
-	return 0;
-
-disable_device:
-	pci_clear_master(pdev);
-	pci_disable_device(pdev);
-
-	return rc;
-}
-
-/**
- * hl_fw_fini() - PCI finalization code.
- * @hdev: Pointer to hl_device structure
- *
- * Unmap PCI bars and disable PCI device.
- */
-void hl_pci_fini(struct hl_device *hdev)
-{
-	hl_pci_bars_unmap(hdev);
-
-	pci_clear_master(hdev->pdev);
-	pci_disable_device(hdev->pdev);
-}