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Date: Thu, 28 Jan 2021 16:30:24 -0800
From: Scott Branden <scott.branden@...adcom.com>
To: Arnd Bergmann <arnd@...db.de>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Scott Branden <scott.branden@...adcom.com>
Cc: Kees Cook <keescook@...omium.org>, linux-kernel@...r.kernel.org,
bcm-kernel-feedback-list@...adcom.com,
Olof Johansson <olof@...om.net>,
Desmond Yan <desmond.yan@...adcom.com>
Subject: [PATCH v10 08/13] misc: bcm-vk: add get_card_info, peerlog_info, and proc_mon_info
Add support to get card_info (details about card),
peerlog_info (to get details of peerlog on card),
and proc_mon_info (process monitoring on card).
This info is used for collection of logs via direct
read of BAR space and by sysfs access (in a follow on commit).
Co-developed-by: Desmond Yan <desmond.yan@...adcom.com>
Signed-off-by: Desmond Yan <desmond.yan@...adcom.com>
Signed-off-by: Scott Branden <scott.branden@...adcom.com>
Acked-by: Olof Johansson <olof@...om.net>
---
drivers/misc/bcm-vk/bcm_vk.h | 60 ++++++++++++++++++
drivers/misc/bcm-vk/bcm_vk_dev.c | 105 +++++++++++++++++++++++++++++++
2 files changed, 165 insertions(+)
diff --git a/drivers/misc/bcm-vk/bcm_vk.h b/drivers/misc/bcm-vk/bcm_vk.h
index 726aab71bb6b..50f2a0cd6e13 100644
--- a/drivers/misc/bcm-vk/bcm_vk.h
+++ b/drivers/misc/bcm-vk/bcm_vk.h
@@ -205,6 +205,21 @@ enum pci_barno {
#define BCM_VK_NUM_TTY 2
+/* VK device max power state, supports 3, full, reduced and low */
+#define MAX_OPP 3
+#define MAX_CARD_INFO_TAG_SIZE 64
+
+struct bcm_vk_card_info {
+ u32 version;
+ char os_tag[MAX_CARD_INFO_TAG_SIZE];
+ char cmpt_tag[MAX_CARD_INFO_TAG_SIZE];
+ u32 cpu_freq_mhz;
+ u32 cpu_scale[MAX_OPP];
+ u32 ddr_freq_mhz;
+ u32 ddr_size_MB;
+ u32 video_core_freq_mhz;
+};
+
/* DAUTH related info */
struct bcm_vk_dauth_key {
char store[VK_BAR1_DAUTH_STORE_SIZE];
@@ -215,10 +230,49 @@ struct bcm_vk_dauth_info {
struct bcm_vk_dauth_key keys[VK_BAR1_DAUTH_MAX];
};
+/*
+ * Control structure of logging messages from the card. This
+ * buffer is for logmsg that comes from vk
+ */
+struct bcm_vk_peer_log {
+ u32 rd_idx;
+ u32 wr_idx;
+ u32 buf_size;
+ u32 mask;
+ char data[0];
+};
+
+/* max buf size allowed */
+#define BCM_VK_PEER_LOG_BUF_MAX SZ_16K
+/* max size per line of peer log */
+#define BCM_VK_PEER_LOG_LINE_MAX 256
+
+/*
+ * single entry for processing type + utilization
+ */
+#define BCM_VK_PROC_TYPE_TAG_LEN 8
+struct bcm_vk_proc_mon_entry_t {
+ char tag[BCM_VK_PROC_TYPE_TAG_LEN];
+ u32 used;
+ u32 max; /**< max capacity */
+};
+
+/**
+ * Structure for run time utilization
+ */
+#define BCM_VK_PROC_MON_MAX 8 /* max entries supported */
+struct bcm_vk_proc_mon_info {
+ u32 num; /**< no of entries */
+ u32 entry_size; /**< per entry size */
+ struct bcm_vk_proc_mon_entry_t entries[BCM_VK_PROC_MON_MAX];
+};
+
struct bcm_vk {
struct pci_dev *pdev;
void __iomem *bar[MAX_BAR];
+ struct bcm_vk_card_info card_info;
+ struct bcm_vk_proc_mon_info proc_mon_info;
struct bcm_vk_dauth_info dauth_info;
/* mutex to protect the ioctls */
@@ -240,6 +294,12 @@ struct bcm_vk {
dma_addr_t tdma_addr; /* test dma segment bus addr */
struct notifier_block panic_nb;
+
+ /* offset of the peer log control in BAR2 */
+ u32 peerlog_off;
+ struct bcm_vk_peer_log peerlog_info; /* record of peer log info */
+ /* offset of processing monitoring info in BAR2 */
+ u32 proc_mon_off;
};
/* wq offload work items bits definitions */
diff --git a/drivers/misc/bcm-vk/bcm_vk_dev.c b/drivers/misc/bcm-vk/bcm_vk_dev.c
index 203a1cf2bae3..a63208513c64 100644
--- a/drivers/misc/bcm-vk/bcm_vk_dev.c
+++ b/drivers/misc/bcm-vk/bcm_vk_dev.c
@@ -172,6 +172,104 @@ static inline int bcm_vk_wait(struct bcm_vk *vk, enum pci_barno bar,
return 0;
}
+static void bcm_vk_get_card_info(struct bcm_vk *vk)
+{
+ struct device *dev = &vk->pdev->dev;
+ u32 offset;
+ int i;
+ u8 *dst;
+ struct bcm_vk_card_info *info = &vk->card_info;
+
+ /* first read the offset from spare register */
+ offset = vkread32(vk, BAR_0, BAR_CARD_STATIC_INFO);
+ offset &= (pci_resource_len(vk->pdev, BAR_2 * 2) - 1);
+
+ /* based on the offset, read info to internal card info structure */
+ dst = (u8 *)info;
+ for (i = 0; i < sizeof(*info); i++)
+ *dst++ = vkread8(vk, BAR_2, offset++);
+
+#define CARD_INFO_LOG_FMT "version : %x\n" \
+ "os_tag : %s\n" \
+ "cmpt_tag : %s\n" \
+ "cpu_freq : %d MHz\n" \
+ "cpu_scale : %d full, %d lowest\n" \
+ "ddr_freq : %d MHz\n" \
+ "ddr_size : %d MB\n" \
+ "video_freq: %d MHz\n"
+ dev_dbg(dev, CARD_INFO_LOG_FMT, info->version, info->os_tag,
+ info->cmpt_tag, info->cpu_freq_mhz, info->cpu_scale[0],
+ info->cpu_scale[MAX_OPP - 1], info->ddr_freq_mhz,
+ info->ddr_size_MB, info->video_core_freq_mhz);
+
+ /*
+ * get the peer log pointer, only need the offset, and get record
+ * of the log buffer information which would be used for checking
+ * before dump, in case the BAR2 memory has been corrupted.
+ */
+ vk->peerlog_off = offset;
+ memcpy_fromio(&vk->peerlog_info, vk->bar[BAR_2] + vk->peerlog_off,
+ sizeof(vk->peerlog_info));
+
+ /*
+ * Do a range checking and if out of bound, the record will be zeroed
+ * which guarantees that nothing would be dumped. In other words,
+ * peer dump is disabled.
+ */
+ if ((vk->peerlog_info.buf_size > BCM_VK_PEER_LOG_BUF_MAX) ||
+ (vk->peerlog_info.mask != (vk->peerlog_info.buf_size - 1)) ||
+ (vk->peerlog_info.rd_idx > vk->peerlog_info.mask) ||
+ (vk->peerlog_info.wr_idx > vk->peerlog_info.mask)) {
+ dev_err(dev, "Peer log disabled - range error: Size 0x%x(0x%x), [Rd Wr] = [%d %d]\n",
+ vk->peerlog_info.buf_size,
+ vk->peerlog_info.mask,
+ vk->peerlog_info.rd_idx,
+ vk->peerlog_info.wr_idx);
+ memset(&vk->peerlog_info, 0, sizeof(vk->peerlog_info));
+ } else {
+ dev_dbg(dev, "Peer log: Size 0x%x(0x%x), [Rd Wr] = [%d %d]\n",
+ vk->peerlog_info.buf_size,
+ vk->peerlog_info.mask,
+ vk->peerlog_info.rd_idx,
+ vk->peerlog_info.wr_idx);
+ }
+}
+
+static void bcm_vk_get_proc_mon_info(struct bcm_vk *vk)
+{
+ struct device *dev = &vk->pdev->dev;
+ struct bcm_vk_proc_mon_info *mon = &vk->proc_mon_info;
+ u32 num, entry_size, offset, buf_size;
+ u8 *dst;
+
+ /* calculate offset which is based on peerlog offset */
+ buf_size = vkread32(vk, BAR_2,
+ vk->peerlog_off
+ + offsetof(struct bcm_vk_peer_log, buf_size));
+ offset = vk->peerlog_off + sizeof(struct bcm_vk_peer_log)
+ + buf_size;
+
+ /* first read the num and entry size */
+ num = vkread32(vk, BAR_2, offset);
+ entry_size = vkread32(vk, BAR_2, offset + sizeof(num));
+
+ /* check for max allowed */
+ if (num > BCM_VK_PROC_MON_MAX) {
+ dev_err(dev, "Processing monitoring entry %d exceeds max %d\n",
+ num, BCM_VK_PROC_MON_MAX);
+ return;
+ }
+ mon->num = num;
+ mon->entry_size = entry_size;
+
+ vk->proc_mon_off = offset;
+
+ /* read it once that will capture those static info */
+ dst = (u8 *)&mon->entries[0];
+ offset += sizeof(num) + sizeof(entry_size);
+ memcpy_fromio(dst, vk->bar[BAR_2] + offset, num * entry_size);
+}
+
static int bcm_vk_sync_card_info(struct bcm_vk *vk)
{
u32 rdy_marker = vkread32(vk, BAR_1, VK_BAR1_MSGQ_DEF_RDY);
@@ -193,6 +291,13 @@ static int bcm_vk_sync_card_info(struct bcm_vk *vk)
vkwrite32(vk, nr_scratch_pages * PAGE_SIZE, BAR_1,
VK_BAR1_SCRATCH_SZ_ADDR);
}
+
+ /* get static card info, only need to read once */
+ bcm_vk_get_card_info(vk);
+
+ /* get the proc mon info once */
+ bcm_vk_get_proc_mon_info(vk);
+
return 0;
}
--
2.17.1
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