lkml.org 
[lkml]   [2019]   [Mar]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 08/15] habanalabs: Move PCI code into common file
Date
From: Tomer Tayar <ttayar@habana.ai>

Move duplicated PCI-related code from ASIC-specific files into the common
pci.c file.

Signed-off-by: Tomer Tayar <ttayar@habana.ai>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
---
drivers/misc/habanalabs/Makefile | 2 +-
drivers/misc/habanalabs/goya/goya.c | 272 +------------
drivers/misc/habanalabs/habanalabs.h | 20 +
.../include/goya/asic_reg/goya_masks.h | 12 -
.../include/hw_ip/pci/pci_general.h | 23 ++
drivers/misc/habanalabs/pci.c | 370 ++++++++++++++++++
6 files changed, 434 insertions(+), 265 deletions(-)
create mode 100644 drivers/misc/habanalabs/include/hw_ip/pci/pci_general.h
create mode 100644 drivers/misc/habanalabs/pci.c

diff --git a/drivers/misc/habanalabs/Makefile b/drivers/misc/habanalabs/Makefile
index 598740d235f8..f8e85243d672 100644
--- a/drivers/misc/habanalabs/Makefile
+++ b/drivers/misc/habanalabs/Makefile
@@ -6,7 +6,7 @@ obj-m := habanalabs.o

habanalabs-y := habanalabs_drv.o device.o context.o asid.o habanalabs_ioctl.o \
command_buffer.o hw_queue.o irq.o sysfs.o hwmon.o memory.o \
- command_submission.o mmu.o firmware_if.o
+ command_submission.o mmu.o firmware_if.o pci.o

habanalabs-$(CONFIG_DEBUG_FS) += debugfs.o

diff --git a/drivers/misc/habanalabs/goya/goya.c b/drivers/misc/habanalabs/goya/goya.c
index 6ba0faa979bd..7e98383ec774 100644
--- a/drivers/misc/habanalabs/goya/goya.c
+++ b/drivers/misc/habanalabs/goya/goya.c
@@ -364,12 +364,13 @@ static void goya_get_fixed_properties(struct hl_device *hdev)
prop->cfg_size = CFG_SIZE;
prop->max_asid = MAX_ASID;
prop->num_of_events = GOYA_ASYNC_EVENT_ID_SIZE;
+ prop->high_pll = PLL_HIGH_DEFAULT;
prop->cb_pool_cb_cnt = GOYA_CB_POOL_CB_CNT;
prop->cb_pool_cb_size = GOYA_CB_POOL_CB_SIZE;
prop->max_power_default = MAX_POWER_DEFAULT;
prop->tpc_enabled_mask = TPC_ENABLED_MASK;
-
- prop->high_pll = PLL_HIGH_DEFAULT;
+ prop->pcie_dbi_base_address = mmPCIE_DBI_BASE;
+ prop->pcie_aux_dbi_reg_addr = CFG_BASE + mmPCIE_AUX_DBI;
}

/*
@@ -383,161 +384,20 @@ static void goya_get_fixed_properties(struct hl_device *hdev)
*/
static int goya_pci_bars_map(struct hl_device *hdev)
{
- struct pci_dev *pdev = hdev->pdev;
+ static const char * const name[] = {"SRAM_CFG", "MSIX", "DDR"};
+ bool is_wc[3] = {false, false, true};
int rc;

- rc = pci_request_regions(pdev, HL_NAME);
- if (rc) {
- dev_err(hdev->dev, "Cannot obtain PCI resources\n");
+ rc = hl_pci_bars_map(hdev, name, is_wc);
+ if (rc)
return rc;
- }
-
- hdev->pcie_bar[SRAM_CFG_BAR_ID] =
- pci_ioremap_bar(pdev, SRAM_CFG_BAR_ID);
- if (!hdev->pcie_bar[SRAM_CFG_BAR_ID]) {
- dev_err(hdev->dev, "pci_ioremap_bar failed for CFG\n");
- rc = -ENODEV;
- goto err_release_regions;
- }
-
- hdev->pcie_bar[MSIX_BAR_ID] = pci_ioremap_bar(pdev, MSIX_BAR_ID);
- if (!hdev->pcie_bar[MSIX_BAR_ID]) {
- dev_err(hdev->dev, "pci_ioremap_bar failed for MSIX\n");
- rc = -ENODEV;
- goto err_unmap_sram_cfg;
- }
-
- hdev->pcie_bar[DDR_BAR_ID] = pci_ioremap_wc_bar(pdev, DDR_BAR_ID);
- if (!hdev->pcie_bar[DDR_BAR_ID]) {
- dev_err(hdev->dev, "pci_ioremap_bar failed for DDR\n");
- rc = -ENODEV;
- goto err_unmap_msix;
- }

hdev->rmmio = hdev->pcie_bar[SRAM_CFG_BAR_ID] +
- (CFG_BASE - SRAM_BASE_ADDR);
-
- return 0;
-
-err_unmap_msix:
- iounmap(hdev->pcie_bar[MSIX_BAR_ID]);
-err_unmap_sram_cfg:
- iounmap(hdev->pcie_bar[SRAM_CFG_BAR_ID]);
-err_release_regions:
- pci_release_regions(pdev);
-
- return rc;
-}
-
-/*
- * goya_pci_bars_unmap - Unmap PCI BARS of Goya device
- *
- * @hdev: pointer to hl_device structure
- *
- * Release all PCI BARS and unmap their virtual addresses
- *
- */
-static void goya_pci_bars_unmap(struct hl_device *hdev)
-{
- struct pci_dev *pdev = hdev->pdev;
-
- iounmap(hdev->pcie_bar[DDR_BAR_ID]);
- iounmap(hdev->pcie_bar[MSIX_BAR_ID]);
- iounmap(hdev->pcie_bar[SRAM_CFG_BAR_ID]);
- pci_release_regions(pdev);
-}
-
-/*
- * goya_elbi_write - Write through the ELBI interface
- *
- * @hdev: pointer to hl_device structure
- *
- * return 0 on success, -1 on failure
- *
- */
-static int goya_elbi_write(struct hl_device *hdev, u64 addr, u32 data)
-{
- struct pci_dev *pdev = hdev->pdev;
- ktime_t timeout;
- u32 val;
-
- /* 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(), 10);
- 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;
-}
-
-/*
- * goya_iatu_write - iatu write routine
- *
- * @hdev: pointer to hl_device structure
- *
- */
-static int goya_iatu_write(struct hl_device *hdev, u32 addr, u32 data)
-{
- u32 dbi_offset;
- int rc;
-
- dbi_offset = addr & 0xFFF;
-
- rc = goya_elbi_write(hdev, CFG_BASE + mmPCIE_AUX_DBI, 0x00300000);
- rc |= goya_elbi_write(hdev, mmPCIE_DBI_BASE + dbi_offset, data);
-
- if (rc)
- return -EIO;
+ (CFG_BASE - SRAM_BASE_ADDR);

return 0;
}

-static void goya_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);
-}
-
/*
* goya_set_ddr_bar_base - set DDR bar to map specific device address
*
@@ -557,20 +417,9 @@ static int goya_set_ddr_bar_base(struct hl_device *hdev, u64 addr)
return 0;

/* Inbound Region 1 - Bar 4 - Point to DDR */
- rc = goya_iatu_write(hdev, 0x314, lower_32_bits(addr));
- rc |= goya_iatu_write(hdev, 0x318, upper_32_bits(addr));
- rc |= goya_iatu_write(hdev, 0x300, 0);
- /* Enable + Bar match + match enable + Bar 4 */
- rc |= goya_iatu_write(hdev, 0x304, 0xC0080400);
-
- /* Return the DBI window to the default location */
- rc |= goya_elbi_write(hdev, CFG_BASE + mmPCIE_AUX_DBI, 0);
- rc |= goya_elbi_write(hdev, CFG_BASE + mmPCIE_AUX_DBI_32, 0);
-
- if (rc) {
- dev_err(hdev->dev, "failed to map DDR bar to 0x%08llx\n", addr);
- return -EIO;
- }
+ rc = hl_pci_set_dram_bar_base(hdev, 1, 4, addr);
+ if (rc)
+ return rc;

if (goya)
goya->ddr_bar_cur_addr = addr;
@@ -588,40 +437,8 @@ static int goya_set_ddr_bar_base(struct hl_device *hdev, u64 addr)
*/
static int goya_init_iatu(struct hl_device *hdev)
{
- int rc;
-
- /* Inbound Region 0 - Bar 0 - Point to SRAM_BASE_ADDR */
- rc = goya_iatu_write(hdev, 0x114, lower_32_bits(SRAM_BASE_ADDR));
- rc |= goya_iatu_write(hdev, 0x118, upper_32_bits(SRAM_BASE_ADDR));
- rc |= goya_iatu_write(hdev, 0x100, 0);
- /* Enable + Bar match + match enable */
- rc |= goya_iatu_write(hdev, 0x104, 0xC0080000);
-
- /* Inbound Region 1 - Bar 4 - Point to DDR */
- rc |= goya_set_ddr_bar_base(hdev, DRAM_PHYS_BASE);
-
- /* Outbound Region 0 - Point to Host */
- rc |= goya_iatu_write(hdev, 0x008, lower_32_bits(HOST_PHYS_BASE));
- rc |= goya_iatu_write(hdev, 0x00C, upper_32_bits(HOST_PHYS_BASE));
- rc |= goya_iatu_write(hdev, 0x010,
- lower_32_bits(HOST_PHYS_BASE + HOST_PHYS_SIZE - 1));
- rc |= goya_iatu_write(hdev, 0x014, 0);
- rc |= goya_iatu_write(hdev, 0x018, 0);
- rc |= goya_iatu_write(hdev, 0x020,
- upper_32_bits(HOST_PHYS_BASE + HOST_PHYS_SIZE - 1));
- /* Increase region size */
- rc |= goya_iatu_write(hdev, 0x000, 0x00002000);
- /* Enable */
- rc |= goya_iatu_write(hdev, 0x004, 0x80000000);
-
- /* Return the DBI window to the default location */
- rc |= goya_elbi_write(hdev, CFG_BASE + mmPCIE_AUX_DBI, 0);
- rc |= goya_elbi_write(hdev, CFG_BASE + mmPCIE_AUX_DBI_32, 0);
-
- if (rc)
- return -EIO;
-
- return 0;
+ return hl_pci_init_iatu(hdev, SRAM_BASE_ADDR, DRAM_PHYS_BASE,
+ HOST_PHYS_SIZE);
}

/*
@@ -667,52 +484,9 @@ static int goya_early_init(struct hl_device *hdev)

prop->dram_pci_bar_size = pci_resource_len(pdev, DDR_BAR_ID);

- /* set DMA mask for GOYA */
- rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(39));
- if (rc) {
- dev_warn(hdev->dev, "Unable to set pci dma mask to 39 bits\n");
- rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
- if (rc) {
- dev_err(hdev->dev,
- "Unable to set pci dma mask to 32 bits\n");
- return rc;
- }
- }
-
- rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(39));
- if (rc) {
- dev_warn(hdev->dev,
- "Unable to set pci consistent dma mask to 39 bits\n");
- rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
- if (rc) {
- dev_err(hdev->dev,
- "Unable to set pci consistent dma mask to 32 bits\n");
- return rc;
- }
- }
-
- if (hdev->reset_pcilink)
- goya_reset_link_through_bridge(hdev);
-
- rc = pci_enable_device_mem(pdev);
- if (rc) {
- dev_err(hdev->dev, "can't enable PCI device\n");
+ rc = hl_pci_init(hdev);
+ if (rc)
return rc;
- }
-
- pci_set_master(pdev);
-
- rc = goya_init_iatu(hdev);
- if (rc) {
- dev_err(hdev->dev, "Failed to initialize iATU\n");
- goto disable_device;
- }
-
- rc = goya_pci_bars_map(hdev);
- if (rc) {
- dev_err(hdev->dev, "Failed to initialize PCI BARS\n");
- goto disable_device;
- }

if (!hdev->pldm) {
val = RREG32(mmPSOC_GLOBAL_CONF_BOOT_STRAP_PINS);
@@ -722,12 +496,6 @@ static int goya_early_init(struct hl_device *hdev)
}

return 0;
-
-disable_device:
- pci_clear_master(pdev);
- pci_disable_device(pdev);
-
- return rc;
}

/*
@@ -740,10 +508,7 @@ static int goya_early_init(struct hl_device *hdev)
*/
static int goya_early_fini(struct hl_device *hdev)
{
- goya_pci_bars_unmap(hdev);
-
- pci_clear_master(hdev->pdev);
- pci_disable_device(hdev->pdev);
+ hl_pci_fini(hdev);

return 0;
}
@@ -5072,7 +4837,10 @@ static const struct hl_asic_funcs goya_funcs = {
.get_pci_id = goya_get_pci_id,
.get_eeprom_data = goya_get_eeprom_data,
.send_cpu_message = goya_send_cpu_message,
- .get_hw_state = goya_get_hw_state
+ .get_hw_state = goya_get_hw_state,
+ .pci_bars_map = goya_pci_bars_map,
+ .set_dram_bar_base = goya_set_ddr_bar_base,
+ .init_iatu = goya_init_iatu
};

/*
diff --git a/drivers/misc/habanalabs/habanalabs.h b/drivers/misc/habanalabs/habanalabs.h
index 1445ba1cafd4..ed3649d38ff8 100644
--- a/drivers/misc/habanalabs/habanalabs.h
+++ b/drivers/misc/habanalabs/habanalabs.h
@@ -148,6 +148,8 @@ enum hl_device_hw_state {
* mapping DRAM memory.
* @dram_size_for_default_page_mapping: DRAM size needed to map to avoid page
* fault.
+ * @pcie_dbi_base_address: Base address of the PCIE_DBI block.
+ * @pcie_aux_dbi_reg_addr: Address of the PCIE_AUX DBI register.
* @mmu_pgt_addr: base physical address in DRAM of MMU page tables.
* @mmu_dram_default_page_addr: DRAM default page physical address.
* @mmu_pgt_size: MMU page tables total size.
@@ -189,6 +191,8 @@ struct asic_fixed_properties {
u64 va_space_dram_start_address;
u64 va_space_dram_end_address;
u64 dram_size_for_default_page_mapping;
+ u64 pcie_dbi_base_address;
+ u64 pcie_aux_dbi_reg_addr;
u64 mmu_pgt_addr;
u64 mmu_dram_default_page_addr;
u32 mmu_pgt_size;
@@ -485,6 +489,9 @@ enum hl_pll_frequency {
* @get_eeprom_data: retrieve EEPROM data from F/W.
* @send_cpu_message: send buffer to ArmCP.
* @get_hw_state: retrieve the H/W state
+ * @pci_bars_map: Map PCI BARs.
+ * @set_dram_bar_base: Set DRAM BAR to map specific device address.
+ * @init_iatu: Initialize the iATU unit inside the PCI controller.
*/
struct hl_asic_funcs {
int (*early_init)(struct hl_device *hdev);
@@ -558,6 +565,9 @@ struct hl_asic_funcs {
int (*send_cpu_message)(struct hl_device *hdev, u32 *msg,
u16 len, u32 timeout, long *result);
enum hl_device_hw_state (*get_hw_state)(struct hl_device *hdev);
+ int (*pci_bars_map)(struct hl_device *hdev);
+ int (*set_dram_bar_base)(struct hl_device *hdev, u64 addr);
+ int (*init_iatu)(struct hl_device *hdev);
};


@@ -1368,6 +1378,16 @@ int hl_fw_send_heartbeat(struct hl_device *hdev);
int hl_fw_armcp_info_get(struct hl_device *hdev);
int hl_fw_get_eeprom_data(struct hl_device *hdev, void *data, size_t max_size);

+int hl_pci_bars_map(struct hl_device *hdev, const char * const name[3],
+ bool is_wc[3]);
+int hl_pci_iatu_write(struct hl_device *hdev, u32 addr, u32 data);
+int hl_pci_set_dram_bar_base(struct hl_device *hdev, u8 inbound_region, u8 bar,
+ u64 addr);
+int hl_pci_init_iatu(struct hl_device *hdev, u64 sram_base_address,
+ u64 dram_base_address, u64 host_phys_size);
+int hl_pci_init(struct hl_device *hdev);
+void hl_pci_fini(struct hl_device *hdev);
+
long hl_get_frequency(struct hl_device *hdev, u32 pll_index, bool curr);
void hl_set_frequency(struct hl_device *hdev, u32 pll_index, u64 freq);
long hl_get_temperature(struct hl_device *hdev, int sensor_index, u32 attr);
diff --git a/drivers/misc/habanalabs/include/goya/asic_reg/goya_masks.h b/drivers/misc/habanalabs/include/goya/asic_reg/goya_masks.h
index a161ecfe74de..8618891d5afa 100644
--- a/drivers/misc/habanalabs/include/goya/asic_reg/goya_masks.h
+++ b/drivers/misc/habanalabs/include/goya/asic_reg/goya_masks.h
@@ -189,18 +189,6 @@
1 << CPU_CA53_CFG_ARM_RST_CONTROL_NL2RESET_SHIFT |\
1 << CPU_CA53_CFG_ARM_RST_CONTROL_NMBISTRESET_SHIFT)

-/* PCI CONFIGURATION SPACE */
-#define mmPCI_CONFIG_ELBI_ADDR 0xFF0
-#define mmPCI_CONFIG_ELBI_DATA 0xFF4
-#define mmPCI_CONFIG_ELBI_CTRL 0xFF8
-#define PCI_CONFIG_ELBI_CTRL_WRITE (1 << 31)
-
-#define mmPCI_CONFIG_ELBI_STS 0xFFC
-#define PCI_CONFIG_ELBI_STS_ERR (1 << 30)
-#define PCI_CONFIG_ELBI_STS_DONE (1 << 31)
-#define PCI_CONFIG_ELBI_STS_MASK (PCI_CONFIG_ELBI_STS_ERR | \
- PCI_CONFIG_ELBI_STS_DONE)
-
#define GOYA_IRQ_HBW_ID_MASK 0x1FFF
#define GOYA_IRQ_HBW_ID_SHIFT 0
#define GOYA_IRQ_HBW_INTERNAL_ID_MASK 0xE000
diff --git a/drivers/misc/habanalabs/include/hw_ip/pci/pci_general.h b/drivers/misc/habanalabs/include/hw_ip/pci/pci_general.h
new file mode 100644
index 000000000000..d232081d4e0f
--- /dev/null
+++ b/drivers/misc/habanalabs/include/hw_ip/pci/pci_general.h
@@ -0,0 +1,23 @@
+/* SPDX-License-Identifier: GPL-2.0
+ *
+ * Copyright 2016-2019 HabanaLabs, Ltd.
+ * All Rights Reserved.
+ *
+ */
+
+#ifndef INCLUDE_PCI_GENERAL_H_
+#define INCLUDE_PCI_GENERAL_H_
+
+/* PCI CONFIGURATION SPACE */
+#define mmPCI_CONFIG_ELBI_ADDR 0xFF0
+#define mmPCI_CONFIG_ELBI_DATA 0xFF4
+#define mmPCI_CONFIG_ELBI_CTRL 0xFF8
+#define PCI_CONFIG_ELBI_CTRL_WRITE (1 << 31)
+
+#define mmPCI_CONFIG_ELBI_STS 0xFFC
+#define PCI_CONFIG_ELBI_STS_ERR (1 << 30)
+#define PCI_CONFIG_ELBI_STS_DONE (1 << 31)
+#define PCI_CONFIG_ELBI_STS_MASK (PCI_CONFIG_ELBI_STS_ERR | \
+ PCI_CONFIG_ELBI_STS_DONE)
+
+#endif /* INCLUDE_PCI_GENERAL_H_ */
diff --git a/drivers/misc/habanalabs/pci.c b/drivers/misc/habanalabs/pci.c
new file mode 100644
index 000000000000..822ac110b997
--- /dev/null
+++ b/drivers/misc/habanalabs/pci.c
@@ -0,0 +1,370 @@
+// 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>
+
+/**
+ * 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;
+ u32 val;
+
+ /* 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(), 10);
+ 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_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_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);
+
+ /* Point to DRAM */
+ if (!hdev->asic_funcs->set_dram_bar_base)
+ return -EINVAL;
+ rc |= hdev->asic_funcs->set_dram_bar_base(hdev, dram_base_address);
+
+ /* Outbound Region 0 - Point to Host */
+ host_phys_end_addr = prop->host_phys_base_address + host_phys_size - 1;
+ rc |= hl_pci_iatu_write(hdev, 0x008,
+ lower_32_bits(prop->host_phys_base_address));
+ rc |= hl_pci_iatu_write(hdev, 0x00C,
+ upper_32_bits(prop->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);
+ 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_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;
+
+ /* set DMA mask */
+ rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(39));
+ if (rc) {
+ dev_warn(hdev->dev, "Unable to set pci dma mask to 39 bits\n");
+ rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
+ if (rc) {
+ dev_err(hdev->dev,
+ "Unable to set pci dma mask to 32 bits\n");
+ return rc;
+ }
+ }
+
+ rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(39));
+ if (rc) {
+ dev_warn(hdev->dev,
+ "Unable to set pci consistent dma mask to 39 bits\n");
+ rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
+ if (rc) {
+ dev_err(hdev->dev,
+ "Unable to set pci consistent dma mask to 32 bits\n");
+ return 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->init_iatu(hdev);
+ if (rc) {
+ dev_err(hdev->dev, "Failed to initialize iATU\n");
+ goto disable_device;
+ }
+
+ rc = hdev->asic_funcs->pci_bars_map(hdev);
+ if (rc) {
+ dev_err(hdev->dev, "Failed to initialize PCI BARs\n");
+ 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);
+}
--
2.17.1
\
 
 \ /
  Last update: 2019-03-17 21:01    [W:0.097 / U:2.800 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site